diff options
Diffstat (limited to 'pkg/sentry')
530 files changed, 7930 insertions, 5353 deletions
diff --git a/pkg/sentry/arch/BUILD b/pkg/sentry/arch/BUILD index 0c044bc33..7aace2d7b 100644 --- a/pkg/sentry/arch/BUILD +++ b/pkg/sentry/arch/BUILD @@ -21,7 +21,7 @@ go_library( "stack.go", "syscalls_amd64.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/arch", + importpath = "gvisor.dev/gvisor/pkg/sentry/arch", visibility = ["//:sandbox"], deps = [ ":registers_go_proto", @@ -44,7 +44,7 @@ proto_library( go_proto_library( name = "registers_go_proto", - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/arch/registers_go_proto", + importpath = "gvisor.dev/gvisor/pkg/sentry/arch/registers_go_proto", proto = ":registers_proto", visibility = ["//visibility:public"], ) diff --git a/pkg/sentry/arch/arch.go b/pkg/sentry/arch/arch.go index 53f0c9018..ace7d5b18 100644 --- a/pkg/sentry/arch/arch.go +++ b/pkg/sentry/arch/arch.go @@ -20,11 +20,11 @@ import ( "fmt" "io" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/cpuid" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // Arch describes an architecture. diff --git a/pkg/sentry/arch/arch_amd64.go b/pkg/sentry/arch/arch_amd64.go index 135c2ee1f..9e7db8b30 100644 --- a/pkg/sentry/arch/arch_amd64.go +++ b/pkg/sentry/arch/arch_amd64.go @@ -22,10 +22,10 @@ import ( "math/rand" "syscall" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/cpuid" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // Host specifies the host architecture. diff --git a/pkg/sentry/arch/arch_state_x86.go b/pkg/sentry/arch/arch_state_x86.go index bb52d8db0..9061fcc86 100644 --- a/pkg/sentry/arch/arch_state_x86.go +++ b/pkg/sentry/arch/arch_state_x86.go @@ -18,8 +18,8 @@ import ( "fmt" "syscall" - "gvisor.googlesource.com/gvisor/pkg/cpuid" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // ErrFloatingPoint indicates a failed restore due to unusable floating point diff --git a/pkg/sentry/arch/arch_x86.go b/pkg/sentry/arch/arch_x86.go index 4d167ce98..9294ac773 100644 --- a/pkg/sentry/arch/arch_x86.go +++ b/pkg/sentry/arch/arch_x86.go @@ -22,12 +22,12 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/cpuid" - "gvisor.googlesource.com/gvisor/pkg/log" - rpb "gvisor.googlesource.com/gvisor/pkg/sentry/arch/registers_go_proto" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/log" + rpb "gvisor.dev/gvisor/pkg/sentry/arch/registers_go_proto" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // System-related constants for x86. diff --git a/pkg/sentry/arch/auxv.go b/pkg/sentry/arch/auxv.go index 80c923103..4546b2ef9 100644 --- a/pkg/sentry/arch/auxv.go +++ b/pkg/sentry/arch/auxv.go @@ -15,7 +15,7 @@ package arch import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // An AuxEntry represents an entry in an ELF auxiliary vector. diff --git a/pkg/sentry/arch/signal_amd64.go b/pkg/sentry/arch/signal_amd64.go index aa030fd70..febd6f9b9 100644 --- a/pkg/sentry/arch/signal_amd64.go +++ b/pkg/sentry/arch/signal_amd64.go @@ -21,9 +21,9 @@ import ( "math" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // SignalAct represents the action that should be taken when a signal is diff --git a/pkg/sentry/arch/signal_stack.go b/pkg/sentry/arch/signal_stack.go index a442f9fdc..5a3228113 100644 --- a/pkg/sentry/arch/signal_stack.go +++ b/pkg/sentry/arch/signal_stack.go @@ -17,7 +17,7 @@ package arch import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) const ( diff --git a/pkg/sentry/arch/stack.go b/pkg/sentry/arch/stack.go index 7e6324e82..7472c3c61 100644 --- a/pkg/sentry/arch/stack.go +++ b/pkg/sentry/arch/stack.go @@ -18,8 +18,8 @@ import ( "encoding/binary" "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // Stack is a simple wrapper around a usermem.IO and an address. diff --git a/pkg/sentry/context/BUILD b/pkg/sentry/context/BUILD index a3c8d0177..8dc1a77b1 100644 --- a/pkg/sentry/context/BUILD +++ b/pkg/sentry/context/BUILD @@ -5,7 +5,7 @@ package(licenses = ["notice"]) go_library( name = "context", srcs = ["context.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/context", + importpath = "gvisor.dev/gvisor/pkg/sentry/context", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/amutex", diff --git a/pkg/sentry/context/context.go b/pkg/sentry/context/context.go index d70f3a5c3..dfd62cbdb 100644 --- a/pkg/sentry/context/context.go +++ b/pkg/sentry/context/context.go @@ -16,8 +16,8 @@ package context import ( - "gvisor.googlesource.com/gvisor/pkg/amutex" - "gvisor.googlesource.com/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/amutex" + "gvisor.dev/gvisor/pkg/log" ) type contextID int diff --git a/pkg/sentry/context/contexttest/BUILD b/pkg/sentry/context/contexttest/BUILD index d17b1bdcf..3b6841b7e 100644 --- a/pkg/sentry/context/contexttest/BUILD +++ b/pkg/sentry/context/contexttest/BUILD @@ -6,7 +6,7 @@ go_library( name = "contexttest", testonly = 1, srcs = ["contexttest.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest", + importpath = "gvisor.dev/gvisor/pkg/sentry/context/contexttest", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/memutil", diff --git a/pkg/sentry/context/contexttest/contexttest.go b/pkg/sentry/context/contexttest/contexttest.go index 83da40711..15cf086a9 100644 --- a/pkg/sentry/context/contexttest/contexttest.go +++ b/pkg/sentry/context/contexttest/contexttest.go @@ -21,15 +21,15 @@ import ( "testing" "time" - "gvisor.googlesource.com/gvisor/pkg/memutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace" - "gvisor.googlesource.com/gvisor/pkg/sentry/uniqueid" + "gvisor.dev/gvisor/pkg/memutil" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/platform/ptrace" + "gvisor.dev/gvisor/pkg/sentry/uniqueid" ) // Context returns a Context that may be used in tests. Uses ptrace as the @@ -59,6 +59,7 @@ func Context(tb testing.TB) context.Context { l: limits.NewLimitSet(), mf: mf, platform: p, + creds: auth.NewAnonymousCredentials(), otherValues: make(map[interface{}]interface{}), } } @@ -70,6 +71,7 @@ type TestContext struct { l *limits.LimitSet mf *pgalloc.MemoryFile platform platform.Platform + creds *auth.Credentials otherValues map[interface{}]interface{} } @@ -108,6 +110,8 @@ func (t *TestContext) RegisterValue(key, value interface{}) { // Value implements context.Context. func (t *TestContext) Value(key interface{}) interface{} { switch key { + case auth.CtxCredentials: + return t.creds case limits.CtxLimits: return t.l case pgalloc.CtxMemoryFile: diff --git a/pkg/sentry/control/BUILD b/pkg/sentry/control/BUILD index 5052bcc0d..bf802d1b6 100644 --- a/pkg/sentry/control/BUILD +++ b/pkg/sentry/control/BUILD @@ -6,11 +6,12 @@ go_library( name = "control", srcs = [ "control.go", + "logging.go", "pprof.go", "proc.go", "state.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/control", + importpath = "gvisor.dev/gvisor/pkg/sentry/control", visibility = [ "//pkg/sentry:internal", ], @@ -22,12 +23,13 @@ go_library( "//pkg/sentry/fs/host", "//pkg/sentry/kernel", "//pkg/sentry/kernel/auth", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/time", "//pkg/sentry/limits", "//pkg/sentry/state", + "//pkg/sentry/strace", "//pkg/sentry/usage", "//pkg/sentry/watchdog", + "//pkg/tcpip/link/sniffer", "//pkg/urpc", ], ) diff --git a/pkg/sentry/control/logging.go b/pkg/sentry/control/logging.go new file mode 100644 index 000000000..811f24324 --- /dev/null +++ b/pkg/sentry/control/logging.go @@ -0,0 +1,136 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package control + +import ( + "fmt" + "sync/atomic" + + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/strace" + "gvisor.dev/gvisor/pkg/tcpip/link/sniffer" +) + +// LoggingArgs are the arguments to use for changing the logging +// level and strace list. +type LoggingArgs struct { + // SetLevel is a flag used to indicate that we should update + // the logging level. We should be able to change the strace + // list without affecting the logging level and vice versa. + SetLevel bool + + // Level is the log level that will be set if SetLevel is true. + Level log.Level + + // SetLogPackets indicates that we should update the log packets flag. + SetLogPackets bool + + // LogPackets is the actual value to set for LogPackets. + // SetLogPackets must be enabled to indicate that we're changing + // the value. + LogPackets bool + + // SetStrace is a flag used to indicate that strace related + // arguments were passed in. + SetStrace bool + + // EnableStrace is a flag from the CLI that specifies whether to + // enable strace at all. If this flag is false then a completely + // pristine copy of the syscall table will be swapped in. This + // approach is used to remain consistent with an empty strace + // whitelist meaning trace all system calls. + EnableStrace bool + + // Strace is the whitelist of syscalls to trace to log. If this + // and StraceEventWhitelist are empty trace all system calls. + StraceWhitelist []string + + // SetEventStrace is a flag used to indicate that event strace + // related arguments were passed in. + SetEventStrace bool + + // StraceEventWhitelist is the whitelist of syscalls to trace + // to event log. + StraceEventWhitelist []string +} + +// Logging provides functions related to logging. +type Logging struct{} + +// Change will change the log level and strace arguments. Although +// this functions signature requires an error it never acctually +// return san error. It's required by the URPC interface. +// Additionally, it may look odd that this is the only method +// attached to an empty struct but this is also part of how +// URPC dispatches. +func (l *Logging) Change(args *LoggingArgs, code *int) error { + if args.SetLevel { + // Logging uses an atomic for the level so this is thread safe. + log.SetLevel(args.Level) + } + + if args.SetLogPackets { + if args.LogPackets { + atomic.StoreUint32(&sniffer.LogPackets, 1) + } else { + atomic.StoreUint32(&sniffer.LogPackets, 0) + } + log.Infof("LogPackets set to: %v", atomic.LoadUint32(&sniffer.LogPackets)) + } + + if args.SetStrace { + if err := l.configureStrace(args); err != nil { + return fmt.Errorf("error configuring strace: %v", err) + } + } + + if args.SetEventStrace { + if err := l.configureEventStrace(args); err != nil { + return fmt.Errorf("error configuring event strace: %v", err) + } + } + + return nil +} + +func (l *Logging) configureStrace(args *LoggingArgs) error { + if args.EnableStrace { + // Install the whitelist specified. + if len(args.StraceWhitelist) > 0 { + if err := strace.Enable(args.StraceWhitelist, strace.SinkTypeLog); err != nil { + return err + } + } else { + // For convenience, if strace is enabled but whitelist + // is empty, enable everything to log. + strace.EnableAll(strace.SinkTypeLog) + } + } else { + // Uninstall all strace functions. + strace.Disable(strace.SinkTypeLog) + } + return nil +} + +func (l *Logging) configureEventStrace(args *LoggingArgs) error { + if len(args.StraceEventWhitelist) > 0 { + if err := strace.Enable(args.StraceEventWhitelist, strace.SinkTypeEvent); err != nil { + return err + } + } else { + strace.Disable(strace.SinkTypeEvent) + } + return nil +} diff --git a/pkg/sentry/control/pprof.go b/pkg/sentry/control/pprof.go index d63916600..1f78d54a2 100644 --- a/pkg/sentry/control/pprof.go +++ b/pkg/sentry/control/pprof.go @@ -21,8 +21,8 @@ import ( "runtime/trace" "sync" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/urpc" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/urpc" ) var errNoOutput = errors.New("no output writer provided") diff --git a/pkg/sentry/control/proc.go b/pkg/sentry/control/proc.go index f7f02a3e1..6ae60c5cb 100644 --- a/pkg/sentry/control/proc.go +++ b/pkg/sentry/control/proc.go @@ -23,16 +23,15 @@ import ( "text/tabwriter" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/host" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/urpc" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/host" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/urpc" ) // Proc includes task-related functions. @@ -123,9 +122,8 @@ func ExecAsync(proc *Proc, args *ExecArgs) (*kernel.ThreadGroup, kernel.ThreadID // TTYFileOperations that wraps the TTY is also returned. func (proc *Proc) execAsync(args *ExecArgs) (*kernel.ThreadGroup, kernel.ThreadID, *host.TTYFileOperations, error) { // Import file descriptors. - l := limits.NewLimitSet() - fdm := proc.Kernel.NewFDMap() - defer fdm.DecRef() + fdTable := proc.Kernel.NewFDTable() + defer fdTable.DecRef() // No matter what happens, we should close all files in the FilePayload // before returning. Any files that are imported will be duped. @@ -149,9 +147,9 @@ func (proc *Proc) execAsync(args *ExecArgs) (*kernel.ThreadGroup, kernel.ThreadI WorkingDirectory: args.WorkingDirectory, Root: args.Root, Credentials: creds, - FDMap: fdm, + FDTable: fdTable, Umask: 0022, - Limits: l, + Limits: limits.NewLimitSet(), MaxSymlinkTraversals: linux.MaxSymlinkTraversals, UTSNamespace: proc.Kernel.RootUTSNamespace(), IPCNamespace: proc.Kernel.RootIPCNamespace(), @@ -212,7 +210,7 @@ func (proc *Proc) execAsync(args *ExecArgs) (*kernel.ThreadGroup, kernel.ThreadI } // Add the file to the FD map. - if err := fdm.NewFDAt(kdefs.FD(appFD), appFile, kernel.FDFlags{}, l); err != nil { + if err := fdTable.NewFDAt(ctx, int32(appFD), appFile, kernel.FDFlags{}); err != nil { return nil, 0, nil, err } } diff --git a/pkg/sentry/control/proc_test.go b/pkg/sentry/control/proc_test.go index b7895d03c..d8ada2694 100644 --- a/pkg/sentry/control/proc_test.go +++ b/pkg/sentry/control/proc_test.go @@ -17,9 +17,9 @@ package control import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/log" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/log" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/usage" ) func init() { diff --git a/pkg/sentry/control/state.go b/pkg/sentry/control/state.go index 11efcaba1..41feeffe3 100644 --- a/pkg/sentry/control/state.go +++ b/pkg/sentry/control/state.go @@ -17,11 +17,11 @@ package control import ( "errors" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/state" - "gvisor.googlesource.com/gvisor/pkg/sentry/watchdog" - "gvisor.googlesource.com/gvisor/pkg/urpc" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/state" + "gvisor.dev/gvisor/pkg/sentry/watchdog" + "gvisor.dev/gvisor/pkg/urpc" ) // ErrInvalidFiles is returned when the urpc call to Save does not include an diff --git a/pkg/sentry/device/BUILD b/pkg/sentry/device/BUILD index 4ccf0674d..7e8918722 100644 --- a/pkg/sentry/device/BUILD +++ b/pkg/sentry/device/BUILD @@ -5,7 +5,7 @@ load("//tools/go_stateify:defs.bzl", "go_library", "go_test") go_library( name = "device", srcs = ["device.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/device", + importpath = "gvisor.dev/gvisor/pkg/sentry/device", visibility = ["//pkg/sentry:internal"], deps = ["//pkg/abi/linux"], ) diff --git a/pkg/sentry/device/device.go b/pkg/sentry/device/device.go index 458d03b30..47945d1a7 100644 --- a/pkg/sentry/device/device.go +++ b/pkg/sentry/device/device.go @@ -22,7 +22,7 @@ import ( "sync" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) // Registry tracks all simple devices and related state on the system for diff --git a/pkg/sentry/fs/BUILD b/pkg/sentry/fs/BUILD index 142a00840..d7259b47b 100644 --- a/pkg/sentry/fs/BUILD +++ b/pkg/sentry/fs/BUILD @@ -43,7 +43,7 @@ go_library( "splice.go", "sync.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", @@ -69,6 +69,7 @@ go_library( "//pkg/state", "//pkg/syserror", "//pkg/waiter", + "//third_party/gvsync", ], ) diff --git a/pkg/sentry/fs/README.md b/pkg/sentry/fs/README.md index f53ed3eaa..db4a1b730 100644 --- a/pkg/sentry/fs/README.md +++ b/pkg/sentry/fs/README.md @@ -69,7 +69,7 @@ Specifically this state is: - An `fs.MountManager` containing mount points. -- A `kernel.FDMap` containing pointers to open files. +- A `kernel.FDTable` containing pointers to open files. Anything else managed by the VFS that can be easily loaded into memory from a filesystem is synced back to those filesystems and is not saved. Examples are @@ -126,7 +126,7 @@ A mount point is restored in two steps: - Second, during state.Load, each `fs.MountedFilesystem` optionally searches for a mount in the `fs.RestoreEnvironment` that matches its saved device - name. The `fs.MountedFilesystem` then restablishes a pointer to the root of + name. The `fs.MountedFilesystem` then reestablishes a pointer to the root of the mounted filesystem. For example, the mount specification provides the network connection for a mounted remote filesystem client to communicate with its remote file server. The `fs.MountedFilesystem` also trivially loads @@ -158,7 +158,7 @@ Otherwise an `fs.File` restores flags, an offset, and a unique identifier (only used internally). It may use the `fs.Inode`, which it indirectly holds a reference on through the -`fs.Dirent`, to restablish an open file handle on the backing filesystem (e.g. +`fs.Dirent`, to reestablish an open file handle on the backing filesystem (e.g. to continue reading and writing). ## Overlay diff --git a/pkg/sentry/fs/anon/BUILD b/pkg/sentry/fs/anon/BUILD index 2111df2e8..ae1c9cf76 100644 --- a/pkg/sentry/fs/anon/BUILD +++ b/pkg/sentry/fs/anon/BUILD @@ -8,7 +8,7 @@ go_library( "anon.go", "device.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/anon", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/anon", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/fs/anon/anon.go b/pkg/sentry/fs/anon/anon.go index a6ea8b9e7..7323c7222 100644 --- a/pkg/sentry/fs/anon/anon.go +++ b/pkg/sentry/fs/anon/anon.go @@ -17,11 +17,11 @@ package anon import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // NewInode constructs an anonymous Inode that is not associated @@ -33,7 +33,7 @@ func NewInode(ctx context.Context) *fs.Inode { User: fs.PermMask{Read: true, Write: true}, }, linux.ANON_INODE_FS_MAGIC), } - return fs.NewInode(iops, fs.NewPseudoMountSource(), fs.StableAttr{ + return fs.NewInode(ctx, iops, fs.NewPseudoMountSource(ctx), fs.StableAttr{ Type: fs.Anonymous, DeviceID: PseudoDevice.DeviceID(), InodeID: PseudoDevice.NextIno(), diff --git a/pkg/sentry/fs/anon/device.go b/pkg/sentry/fs/anon/device.go index 5927bd11e..d9ac14956 100644 --- a/pkg/sentry/fs/anon/device.go +++ b/pkg/sentry/fs/anon/device.go @@ -15,7 +15,7 @@ package anon import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/device" ) // PseudoDevice is the device on which all anonymous inodes reside. diff --git a/pkg/sentry/fs/ashmem/BUILD b/pkg/sentry/fs/ashmem/BUILD deleted file mode 100644 index ef1c31a3e..000000000 --- a/pkg/sentry/fs/ashmem/BUILD +++ /dev/null @@ -1,65 +0,0 @@ -package(licenses = ["notice"]) - -load("//tools/go_stateify:defs.bzl", "go_library", "go_test") -load("//tools/go_generics:defs.bzl", "go_template_instance") - -go_library( - name = "ashmem", - srcs = [ - "area.go", - "device.go", - "pin_board.go", - "uint64_range.go", - "uint64_set.go", - ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ashmem", - visibility = ["//pkg/sentry:internal"], - deps = [ - "//pkg/abi/linux", - "//pkg/sentry/arch", - "//pkg/sentry/context", - "//pkg/sentry/fs", - "//pkg/sentry/fs/fsutil", - "//pkg/sentry/fs/tmpfs", - "//pkg/sentry/kernel/time", - "//pkg/sentry/memmap", - "//pkg/sentry/usage", - "//pkg/sentry/usermem", - "//pkg/syserror", - "//pkg/waiter", - ], -) - -go_test( - name = "ashmem_test", - size = "small", - srcs = ["pin_board_test.go"], - embed = [":ashmem"], - deps = [ - "//pkg/abi/linux", - "//pkg/sentry/usermem", - ], -) - -go_template_instance( - name = "uint64_range", - out = "uint64_range.go", - package = "ashmem", - template = "//pkg/segment:generic_range", - types = { - "T": "uint64", - }, -) - -go_template_instance( - name = "uint64_set", - out = "uint64_set.go", - package = "ashmem", - template = "//pkg/segment:generic_set", - types = { - "Key": "uint64", - "Range": "Range", - "Value": "noValue", - "Functions": "setFunctions", - }, -) diff --git a/pkg/sentry/fs/ashmem/area.go b/pkg/sentry/fs/ashmem/area.go deleted file mode 100644 index b4b0cc08b..000000000 --- a/pkg/sentry/fs/ashmem/area.go +++ /dev/null @@ -1,308 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package ashmem - -import ( - "sync" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/tmpfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" -) - -const ( - // namePrefix is the name prefix assumed and forced by the Linux implementation. - namePrefix = "dev/ashmem" - - // nameLen is the maximum name length. - nameLen = 256 -) - -// Area implements fs.FileOperations. -// -// +stateify savable -type Area struct { - fsutil.FileNoFsync `state:"nosave"` - fsutil.FileNoSplice `state:"nosave"` - fsutil.FileNoopFlush `state:"nosave"` - fsutil.FileNotDirReaddir `state:"nosave"` - fsutil.FileUseInodeUnstableAttr `state:"nosave"` - waiter.AlwaysReady `state:"nosave"` - - ad *Device - - // mu protects fields below. - mu sync.Mutex `state:"nosave"` - tmpfsFile *fs.File - name string - size uint64 - perms usermem.AccessType - pb *PinBoard -} - -// Release implements fs.FileOperations.Release. -func (a *Area) Release() { - a.mu.Lock() - defer a.mu.Unlock() - if a.tmpfsFile != nil { - a.tmpfsFile.DecRef() - a.tmpfsFile = nil - } -} - -// Seek implements fs.FileOperations.Seek. -func (a *Area) Seek(ctx context.Context, file *fs.File, whence fs.SeekWhence, offset int64) (int64, error) { - a.mu.Lock() - defer a.mu.Unlock() - if a.size == 0 { - return 0, syserror.EINVAL - } - if a.tmpfsFile == nil { - return 0, syserror.EBADF - } - return a.tmpfsFile.FileOperations.Seek(ctx, file, whence, offset) -} - -// Read implements fs.FileOperations.Read. -func (a *Area) Read(ctx context.Context, file *fs.File, dst usermem.IOSequence, offset int64) (int64, error) { - a.mu.Lock() - defer a.mu.Unlock() - if a.size == 0 { - return 0, nil - } - if a.tmpfsFile == nil { - return 0, syserror.EBADF - } - return a.tmpfsFile.FileOperations.Read(ctx, file, dst, offset) -} - -// Write implements fs.FileOperations.Write. -func (a *Area) Write(ctx context.Context, file *fs.File, src usermem.IOSequence, offset int64) (int64, error) { - return 0, syserror.ENOSYS -} - -// ConfigureMMap implements fs.FileOperations.ConfigureMMap. -func (a *Area) ConfigureMMap(ctx context.Context, file *fs.File, opts *memmap.MMapOpts) error { - a.mu.Lock() - defer a.mu.Unlock() - if a.size == 0 { - return syserror.EINVAL - } - - if !a.perms.SupersetOf(opts.Perms) { - return syserror.EPERM - } - opts.MaxPerms = opts.MaxPerms.Intersect(a.perms) - - if a.tmpfsFile == nil { - tmpfsInodeOps := tmpfs.NewInMemoryFile(ctx, usage.Tmpfs, fs.UnstableAttr{}) - tmpfsInode := fs.NewInode(tmpfsInodeOps, fs.NewPseudoMountSource(), fs.StableAttr{}) - dirent := fs.NewDirent(tmpfsInode, namePrefix+"/"+a.name) - tmpfsFile, err := tmpfsInode.GetFile(ctx, dirent, fs.FileFlags{Read: true, Write: true}) - // Drop the extra reference on the Dirent. - dirent.DecRef() - - if err != nil { - return err - } - - // Truncate to the size set by ASHMEM_SET_SIZE ioctl. - err = tmpfsInodeOps.Truncate(ctx, tmpfsInode, int64(a.size)) - if err != nil { - return err - } - a.tmpfsFile = tmpfsFile - a.pb = NewPinBoard() - } - - return a.tmpfsFile.ConfigureMMap(ctx, opts) -} - -// Ioctl implements fs.FileOperations.Ioctl. -func (a *Area) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { - // Switch on ioctl request. - switch args[1].Uint() { - case linux.AshmemSetNameIoctl: - name, err := usermem.CopyStringIn(ctx, io, args[2].Pointer(), nameLen-1, usermem.IOOpts{ - AddressSpaceActive: true, - }) - if err != nil { - return 0, err - } - - a.mu.Lock() - defer a.mu.Unlock() - - // Cannot set name for already mapped ashmem. - if a.tmpfsFile != nil { - return 0, syserror.EINVAL - } - a.name = name - return 0, nil - - case linux.AshmemGetNameIoctl: - a.mu.Lock() - var local []byte - if a.name != "" { - nameLen := len([]byte(a.name)) - local = make([]byte, nameLen, nameLen+1) - copy(local, []byte(a.name)) - local = append(local, 0) - } else { - nameLen := len([]byte(namePrefix)) - local = make([]byte, nameLen, nameLen+1) - copy(local, []byte(namePrefix)) - local = append(local, 0) - } - a.mu.Unlock() - - if _, err := io.CopyOut(ctx, args[2].Pointer(), local, usermem.IOOpts{ - AddressSpaceActive: true, - }); err != nil { - return 0, syserror.EFAULT - } - return 0, nil - - case linux.AshmemSetSizeIoctl: - a.mu.Lock() - defer a.mu.Unlock() - - // Cannot set size for already mapped ashmem. - if a.tmpfsFile != nil { - return 0, syserror.EINVAL - } - a.size = uint64(args[2].SizeT()) - return 0, nil - - case linux.AshmemGetSizeIoctl: - return uintptr(a.size), nil - - case linux.AshmemPinIoctl, linux.AshmemUnpinIoctl, linux.AshmemGetPinStatusIoctl: - // Locking and unlocking is ok since once tmpfsFile is set, it won't be nil again - // even after unmapping! Unlocking is needed in order to avoid a deadlock on - // usermem.CopyObjectIn. - - // Cannot execute pin-related ioctls before mapping. - a.mu.Lock() - if a.tmpfsFile == nil { - a.mu.Unlock() - return 0, syserror.EINVAL - } - a.mu.Unlock() - - var pin linux.AshmemPin - _, err := usermem.CopyObjectIn(ctx, io, args[2].Pointer(), &pin, usermem.IOOpts{ - AddressSpaceActive: true, - }) - if err != nil { - return 0, syserror.EFAULT - } - - a.mu.Lock() - defer a.mu.Unlock() - return a.pinOperation(pin, args[1].Uint()) - - case linux.AshmemPurgeAllCachesIoctl: - return 0, nil - - case linux.AshmemSetProtMaskIoctl: - prot := uint64(args[2].ModeT()) - perms := usermem.AccessType{ - Read: prot&linux.PROT_READ != 0, - Write: prot&linux.PROT_WRITE != 0, - Execute: prot&linux.PROT_EXEC != 0, - } - - a.mu.Lock() - defer a.mu.Unlock() - - // Can only narrow prot mask. - if !a.perms.SupersetOf(perms) { - return 0, syserror.EINVAL - } - - // TODO(b/30946773,gvisor.dev/issue/153): If personality flag - // READ_IMPLIES_EXEC is set, set PROT_EXEC if PORT_READ is set. - - a.perms = perms - return 0, nil - - case linux.AshmemGetProtMaskIoctl: - return uintptr(a.perms.Prot()), nil - default: - // Ioctls irrelevant to Ashmem. - return 0, syserror.EINVAL - } -} - -// pinOperation should only be called while holding a.mu. -func (a *Area) pinOperation(pin linux.AshmemPin, op uint32) (uintptr, error) { - // Page-align a.size for checks. - pageAlignedSize, ok := usermem.Addr(a.size).RoundUp() - if !ok { - return 0, syserror.EINVAL - } - // Len 0 means everything onward. - if pin.Len == 0 { - pin.Len = uint32(pageAlignedSize) - pin.Offset - } - // Both Offset and Len have to be page-aligned. - if pin.Offset%uint32(usermem.PageSize) != 0 { - return 0, syserror.EINVAL - } - if pin.Len%uint32(usermem.PageSize) != 0 { - return 0, syserror.EINVAL - } - // Adding Offset and Len must not cause an uint32 overflow. - if end := pin.Offset + pin.Len; end < pin.Offset { - return 0, syserror.EINVAL - } - // Pin range must not exceed a's size. - if uint32(pageAlignedSize) < pin.Offset+pin.Len { - return 0, syserror.EINVAL - } - // Handle each operation. - r := RangeFromAshmemPin(pin) - switch op { - case linux.AshmemPinIoctl: - if a.pb.PinRange(r) { - return linux.AshmemWasPurged, nil - } - return linux.AshmemNotPurged, nil - - case linux.AshmemUnpinIoctl: - // TODO(b/30946773): Implement purge on unpin. - a.pb.UnpinRange(r) - return 0, nil - - case linux.AshmemGetPinStatusIoctl: - if a.pb.RangePinnedStatus(r) { - return linux.AshmemIsPinned, nil - } - return linux.AshmemIsUnpinned, nil - - default: - panic("unreachable") - } - -} diff --git a/pkg/sentry/fs/ashmem/device.go b/pkg/sentry/fs/ashmem/device.go deleted file mode 100644 index 22e1530e9..000000000 --- a/pkg/sentry/fs/ashmem/device.go +++ /dev/null @@ -1,61 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Package ashmem implements Android ashmem module (Anonymus Shared Memory). -package ashmem - -import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" -) - -// Device implements fs.InodeOperations. -// -// +stateify savable -type Device struct { - fsutil.InodeGenericChecker `state:"nosave"` - fsutil.InodeNoExtendedAttributes `state:"nosave"` - fsutil.InodeNoopAllocate `state:"nosave"` - fsutil.InodeNoopRelease `state:"nosave"` - fsutil.InodeNoopTruncate `state:"nosave"` - fsutil.InodeNoopWriteOut `state:"nosave"` - fsutil.InodeNotDirectory `state:"nosave"` - fsutil.InodeNotMappable `state:"nosave"` - fsutil.InodeNotSocket `state:"nosave"` - fsutil.InodeNotSymlink `state:"nosave"` - fsutil.InodeVirtual `state:"nosave"` - - fsutil.InodeSimpleAttributes -} - -var _ fs.InodeOperations = (*Device)(nil) - -// NewDevice creates and intializes a Device structure. -func NewDevice(ctx context.Context, owner fs.FileOwner, fp fs.FilePermissions) *Device { - return &Device{ - InodeSimpleAttributes: fsutil.NewInodeSimpleAttributes(ctx, owner, fp, linux.ANON_INODE_FS_MAGIC), - } -} - -// GetFile implements fs.InodeOperations.GetFile. -func (ad *Device) GetFile(ctx context.Context, d *fs.Dirent, flags fs.FileFlags) (*fs.File, error) { - return fs.NewFile(ctx, d, flags, &Area{ - ad: ad, - tmpfsFile: nil, - perms: usermem.AnyAccess, - }), nil -} diff --git a/pkg/sentry/fs/ashmem/pin_board.go b/pkg/sentry/fs/ashmem/pin_board.go deleted file mode 100644 index bdf23b371..000000000 --- a/pkg/sentry/fs/ashmem/pin_board.go +++ /dev/null @@ -1,127 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package ashmem - -import "gvisor.googlesource.com/gvisor/pkg/abi/linux" - -const maxUint64 = ^uint64(0) - -// setFunctions implements segment.Functions generated from segment.Functions for -// uint64 Key and noValue Value. For more information, see the build file and -// segment set implementation at pkg/segment/set.go. -type setFunctions struct{} - -// noValue is a type of range attached value, which is irrelevant here. -type noValue struct{} - -// MinKey implements segment.Functions.MinKey. -func (setFunctions) MinKey() uint64 { - return 0 -} - -// MaxKey implements segment.Functions.MaxKey. -func (setFunctions) MaxKey() uint64 { - return maxUint64 -} - -// ClearValue implements segment.Functions.ClearValue. -func (setFunctions) ClearValue(*noValue) { - return -} - -// Merge implements segment.Functions.Merge. -func (setFunctions) Merge(Range, noValue, Range, noValue) (noValue, bool) { - return noValue{}, true -} - -// Split implements segment.Functions.Split. -func (setFunctions) Split(Range, noValue, uint64) (noValue, noValue) { - return noValue{}, noValue{} -} - -// PinBoard represents a set of pinned ranges in ashmem. -// -// segment.Set is used for implementation where segments represent -// ranges of pinned bytes, while gaps represent ranges of unpinned -// bytes. All ranges are page-aligned. -// -// +stateify savable -type PinBoard struct { - Set -} - -// NewPinBoard creates a new pin board with all pages pinned. -func NewPinBoard() *PinBoard { - var pb PinBoard - pb.PinRange(Range{0, maxUint64}) - return &pb -} - -// PinRange pins all pages in the specified range and returns true -// if there are any newly pinned pages. -func (pb *PinBoard) PinRange(r Range) bool { - pinnedPages := false - for gap := pb.LowerBoundGap(r.Start); gap.Ok() && gap.Start() < r.End; { - common := gap.Range().Intersect(r) - if common.Length() == 0 { - gap = gap.NextGap() - continue - } - pinnedPages = true - gap = pb.Insert(gap, common, noValue{}).NextGap() - } - return pinnedPages -} - -// UnpinRange unpins all pages in the specified range. -func (pb *PinBoard) UnpinRange(r Range) { - for seg := pb.LowerBoundSegment(r.Start); seg.Ok() && seg.Start() < r.End; { - common := seg.Range().Intersect(r) - if common.Length() == 0 { - seg = seg.NextSegment() - continue - } - seg = pb.RemoveRange(common).NextSegment() - } -} - -// RangePinnedStatus returns false if there's at least one unpinned page in the -// specified range. -func (pb *PinBoard) RangePinnedStatus(r Range) bool { - for gap := pb.LowerBoundGap(r.Start); gap.Ok() && gap.Start() < r.End; { - common := gap.Range().Intersect(r) - if common.Length() == 0 { - gap = gap.NextGap() - continue - } - return false - } - return true -} - -// RangeFromAshmemPin converts ashmem's original pin structure -// to Range. -func RangeFromAshmemPin(ap linux.AshmemPin) Range { - if ap.Len == 0 { - return Range{ - uint64(ap.Offset), - maxUint64, - } - } - return Range{ - uint64(ap.Offset), - uint64(ap.Offset) + uint64(ap.Len), - } -} diff --git a/pkg/sentry/fs/ashmem/pin_board_test.go b/pkg/sentry/fs/ashmem/pin_board_test.go deleted file mode 100644 index 24f5d86d6..000000000 --- a/pkg/sentry/fs/ashmem/pin_board_test.go +++ /dev/null @@ -1,130 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package ashmem - -import ( - "testing" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" -) - -func TestPinBoard(t *testing.T) { - pb := NewPinBoard() - - // Confirm that all pages are pinned. - if !pb.RangePinnedStatus(RangeFromAshmemPin(linux.AshmemPin{0, 0})) { - t.Errorf("RangePinnedStatus(all pages) returned false (unpinned) at start.") - } - - // Unpin pages [1, 11) (counting from 0) - pb.UnpinRange(RangeFromAshmemPin(linux.AshmemPin{ - usermem.PageSize, - usermem.PageSize * 10, - })) - - // Confirm that pages [1, 11) are unpinned and that page 0 and pages - // larger than 10 are pinned. - pinned := []linux.AshmemPin{ - { - 0, - usermem.PageSize, - }, { - usermem.PageSize * 11, - 0, - }, - } - - for _, pin := range pinned { - if !pb.RangePinnedStatus(RangeFromAshmemPin(pin)) { - t.Errorf("RangePinnedStatus(AshmemPin{offset (pages): %v, len (pages): %v}) returned false (unpinned).", - pin.Offset, pin.Len) - } - } - - unpinned := []linux.AshmemPin{ - { - usermem.PageSize, - usermem.PageSize * 10, - }, - } - - for _, pin := range unpinned { - if pb.RangePinnedStatus(RangeFromAshmemPin(pin)) { - t.Errorf("RangePinnedStatus(AshmemPin{offset (pages): %v, len (pages): %v}) returned true (pinned).", - pin.Offset, pin.Len) - } - } - - // Pin pages [2, 6). - pb.PinRange(RangeFromAshmemPin(linux.AshmemPin{ - usermem.PageSize * 2, - usermem.PageSize * 4, - })) - - // Confirm that pages 0, [2, 6) and pages larger than 10 are pinned - // while others remain unpinned. - pinned = []linux.AshmemPin{ - { - 0, - usermem.PageSize, - }, - { - usermem.PageSize * 2, - usermem.PageSize * 4, - }, - { - usermem.PageSize * 11, - 0, - }, - } - - for _, pin := range pinned { - if !pb.RangePinnedStatus(RangeFromAshmemPin(pin)) { - t.Errorf("RangePinnedStatus(AshmemPin{offset (pages): %v, len (pages): %v}) returned false (unpinned).", - pin.Offset, pin.Len) - } - } - - unpinned = []linux.AshmemPin{ - { - usermem.PageSize, - usermem.PageSize, - }, { - usermem.PageSize * 6, - usermem.PageSize * 5, - }, - } - - for _, pin := range unpinned { - if pb.RangePinnedStatus(RangeFromAshmemPin(pin)) { - t.Errorf("RangePinnedStatus(AshmemPin{offset (pages): %v, len (pages): %v}) returned true (pinned).", - pin.Offset, pin.Len) - } - } - - // Status of a partially pinned range is unpinned. - if pb.RangePinnedStatus(RangeFromAshmemPin(linux.AshmemPin{0, 0})) { - t.Errorf("RangePinnedStatus(all pages) returned true (pinned).") - } - - // Pin the whole range again. - pb.PinRange(RangeFromAshmemPin(linux.AshmemPin{0, 0})) - - // Confirm that all pages are pinned. - if !pb.RangePinnedStatus(RangeFromAshmemPin(linux.AshmemPin{0, 0})) { - t.Errorf("RangePinnedStatus(all pages) returned false (unpinned) at start.") - } -} diff --git a/pkg/sentry/fs/attr.go b/pkg/sentry/fs/attr.go index 591e35e6a..9fc6a5bc2 100644 --- a/pkg/sentry/fs/attr.go +++ b/pkg/sentry/fs/attr.go @@ -19,11 +19,11 @@ import ( "os" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" ) // InodeType enumerates types of Inodes. @@ -89,6 +89,28 @@ func (n InodeType) String() string { } } +// LinuxType returns the linux file type for this inode type. +func (n InodeType) LinuxType() uint32 { + switch n { + case RegularFile, SpecialFile: + return linux.ModeRegular + case Directory, SpecialDirectory: + return linux.ModeDirectory + case Symlink: + return linux.ModeSymlink + case Pipe: + return linux.ModeNamedPipe + case CharacterDevice: + return linux.ModeCharacterDevice + case BlockDevice: + return linux.ModeBlockDevice + case Socket: + return linux.ModeSocket + default: + return 0 + } +} + // StableAttr contains Inode attributes that will be stable throughout the // lifetime of the Inode. // diff --git a/pkg/sentry/fs/binder/BUILD b/pkg/sentry/fs/binder/BUILD deleted file mode 100644 index 3710664d3..000000000 --- a/pkg/sentry/fs/binder/BUILD +++ /dev/null @@ -1,27 +0,0 @@ -package(licenses = ["notice"]) - -load("//tools/go_stateify:defs.bzl", "go_library") - -go_library( - name = "binder", - srcs = [ - "binder.go", - ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/binder", - visibility = ["//pkg/sentry:internal"], - deps = [ - "//pkg/abi/linux", - "//pkg/sentry/arch", - "//pkg/sentry/context", - "//pkg/sentry/fs", - "//pkg/sentry/fs/fsutil", - "//pkg/sentry/kernel", - "//pkg/sentry/memmap", - "//pkg/sentry/pgalloc", - "//pkg/sentry/platform", - "//pkg/sentry/usage", - "//pkg/sentry/usermem", - "//pkg/syserror", - "//pkg/waiter", - ], -) diff --git a/pkg/sentry/fs/binder/binder.go b/pkg/sentry/fs/binder/binder.go deleted file mode 100644 index c78f1fc40..000000000 --- a/pkg/sentry/fs/binder/binder.go +++ /dev/null @@ -1,260 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Package binder implements Android Binder IPC module. -package binder - -import ( - "sync" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" -) - -const ( - currentProtocolVersion = 8 - - // mmapSizeLimit is the upper limit for mapped memory size in Binder. - mmapSizeLimit = 4 * 1024 * 1024 // 4MB -) - -// Device implements fs.InodeOperations. -// -// +stateify savable -type Device struct { - fsutil.InodeGenericChecker `state:"nosave"` - fsutil.InodeNoExtendedAttributes `state:"nosave"` - fsutil.InodeNoopAllocate `state:"nosave"` - fsutil.InodeNoopRelease `state:"nosave"` - fsutil.InodeNoopTruncate `state:"nosave"` - fsutil.InodeNoopWriteOut `state:"nosave"` - fsutil.InodeNotDirectory `state:"nosave"` - fsutil.InodeNotMappable `state:"nosave"` - fsutil.InodeNotSocket `state:"nosave"` - fsutil.InodeNotSymlink `state:"nosave"` - fsutil.InodeVirtual `state:"nosave"` - - fsutil.InodeSimpleAttributes -} - -var _ fs.InodeOperations = (*Device)(nil) - -// NewDevice creates and intializes a Device structure. -func NewDevice(ctx context.Context, owner fs.FileOwner, fp fs.FilePermissions) *Device { - return &Device{ - InodeSimpleAttributes: fsutil.NewInodeSimpleAttributes(ctx, owner, fp, 0), - } -} - -// GetFile implements fs.InodeOperations.GetFile. -// -// TODO(b/30946773): Add functionality to GetFile: Additional fields will be -// needed in the Device structure, initialize them here. Also, Device will need -// to keep track of the created Procs in order to implement BINDER_READ_WRITE -// ioctl. -func (bd *Device) GetFile(ctx context.Context, d *fs.Dirent, flags fs.FileFlags) (*fs.File, error) { - return fs.NewFile(ctx, d, flags, &Proc{ - bd: bd, - task: kernel.TaskFromContext(ctx), - mfp: pgalloc.MemoryFileProviderFromContext(ctx), - }), nil -} - -// Proc implements fs.FileOperations and fs.IoctlGetter. -// -// +stateify savable -type Proc struct { - fsutil.FileNoFsync `state:"nosave"` - fsutil.FileNoSplice `state:"nosave"` - fsutil.FileNotDirReaddir `state:"nosave"` - fsutil.FileUseInodeUnstableAttr `state:"nosave"` - waiter.AlwaysReady `state:"nosave"` - - bd *Device - task *kernel.Task - mfp pgalloc.MemoryFileProvider - - // mu protects fr. - mu sync.Mutex `state:"nosave"` - - // mapped is memory allocated from mfp.MemoryFile() by AddMapping. - mapped platform.FileRange -} - -// Release implements fs.FileOperations.Release. -func (bp *Proc) Release() { - bp.mu.Lock() - defer bp.mu.Unlock() - if bp.mapped.Length() != 0 { - bp.mfp.MemoryFile().DecRef(bp.mapped) - } -} - -// Seek implements fs.FileOperations.Seek. -// -// Binder doesn't support seek operation (unless in debug mode). -func (bp *Proc) Seek(ctx context.Context, file *fs.File, whence fs.SeekWhence, offset int64) (int64, error) { - return offset, syserror.EOPNOTSUPP -} - -// Read implements fs.FileOperations.Read. -// -// Binder doesn't support read operation (unless in debug mode). -func (bp *Proc) Read(ctx context.Context, file *fs.File, dst usermem.IOSequence, offset int64) (int64, error) { - return 0, syserror.EOPNOTSUPP -} - -// Write implements fs.FileOperations.Write. -// -// Binder doesn't support write operation. -func (bp *Proc) Write(ctx context.Context, file *fs.File, src usermem.IOSequence, offset int64) (int64, error) { - return 0, syserror.EOPNOTSUPP -} - -// Flush implements fs.FileOperations.Flush. -// -// TODO(b/30946773): Implement. -func (bp *Proc) Flush(ctx context.Context, file *fs.File) error { - return nil -} - -// ConfigureMMap implements fs.FileOperations.ConfigureMMap. -func (bp *Proc) ConfigureMMap(ctx context.Context, file *fs.File, opts *memmap.MMapOpts) error { - // Compare drivers/android/binder.c:binder_mmap(). - if caller := kernel.TaskFromContext(ctx); caller != bp.task { - return syserror.EINVAL - } - if opts.Length > mmapSizeLimit { - opts.Length = mmapSizeLimit - } - opts.MaxPerms.Write = false - - // TODO(b/30946773): Binder sets VM_DONTCOPY, preventing the created vma - // from being copied across fork(), but we don't support this yet. As - // a result, MMs containing a Binder mapping cannot be forked (MM.Fork will - // fail when AddMapping returns EBUSY). - - return fsutil.GenericConfigureMMap(file, bp, opts) -} - -// Ioctl implements fs.FileOperations.Ioctl. -// -// TODO(b/30946773): Implement. -func (bp *Proc) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { - // Switch on ioctl request. - switch uint32(args[1].Int()) { - case linux.BinderVersionIoctl: - ver := &linux.BinderVersion{ - ProtocolVersion: currentProtocolVersion, - } - // Copy result to user-space. - _, err := usermem.CopyObjectOut(ctx, io, args[2].Pointer(), ver, usermem.IOOpts{ - AddressSpaceActive: true, - }) - return 0, err - case linux.BinderWriteReadIoctl: - // TODO(b/30946773): Implement. - fallthrough - case linux.BinderSetIdleTimeoutIoctl: - // TODO(b/30946773): Implement. - fallthrough - case linux.BinderSetMaxThreadsIoctl: - // TODO(b/30946773): Implement. - fallthrough - case linux.BinderSetIdlePriorityIoctl: - // TODO(b/30946773): Implement. - fallthrough - case linux.BinderSetContextMgrIoctl: - // TODO(b/30946773): Implement. - fallthrough - case linux.BinderThreadExitIoctl: - // TODO(b/30946773): Implement. - return 0, syserror.ENOSYS - default: - // Ioctls irrelevant to Binder. - return 0, syserror.EINVAL - } -} - -// AddMapping implements memmap.Mappable.AddMapping. -func (bp *Proc) AddMapping(ctx context.Context, ms memmap.MappingSpace, ar usermem.AddrRange, offset uint64, _ bool) error { - bp.mu.Lock() - defer bp.mu.Unlock() - if bp.mapped.Length() != 0 { - // mmap has been called before, which binder_mmap() doesn't like. - return syserror.EBUSY - } - // Binder only allocates and maps a single page up-front - // (drivers/android/binder.c:binder_mmap() => binder_update_page_range()). - fr, err := bp.mfp.MemoryFile().Allocate(usermem.PageSize, usage.Anonymous) - if err != nil { - return err - } - bp.mapped = fr - return nil -} - -// RemoveMapping implements memmap.Mappable.RemoveMapping. -func (*Proc) RemoveMapping(context.Context, memmap.MappingSpace, usermem.AddrRange, uint64, bool) { - // Nothing to do. Notably, we don't free bp.mapped to allow another mmap. -} - -// CopyMapping implements memmap.Mappable.CopyMapping. -func (bp *Proc) CopyMapping(ctx context.Context, ms memmap.MappingSpace, srcAR, dstAR usermem.AddrRange, offset uint64, _ bool) error { - // Nothing to do. Notably, this is one case where CopyMapping isn't - // equivalent to AddMapping, as AddMapping would return EBUSY. - return nil -} - -// Translate implements memmap.Mappable.Translate. -func (bp *Proc) Translate(ctx context.Context, required, optional memmap.MappableRange, at usermem.AccessType) ([]memmap.Translation, error) { - // TODO(b/30946773): In addition to the page initially allocated and mapped - // in AddMapping (Linux: binder_mmap), Binder allocates and maps pages for - // each transaction (Linux: binder_ioctl => binder_ioctl_write_read => - // binder_thread_write => binder_transaction => binder_alloc_buf => - // binder_update_page_range). Since we don't actually implement - // BinderWriteReadIoctl (Linux: BINDER_WRITE_READ), we only ever have the - // first page. - var err error - if required.End > usermem.PageSize { - err = &memmap.BusError{syserror.EFAULT} - } - if required.Start == 0 { - return []memmap.Translation{ - { - Source: memmap.MappableRange{0, usermem.PageSize}, - File: bp.mfp.MemoryFile(), - Offset: bp.mapped.Start, - Perms: usermem.AnyAccess, - }, - }, err - } - return nil, err -} - -// InvalidateUnsavable implements memmap.Mappable.InvalidateUnsavable. -func (bp *Proc) InvalidateUnsavable(ctx context.Context) error { - return nil -} diff --git a/pkg/sentry/fs/context.go b/pkg/sentry/fs/context.go index c80ea0175..51b4c7ee1 100644 --- a/pkg/sentry/fs/context.go +++ b/pkg/sentry/fs/context.go @@ -15,9 +15,9 @@ package fs import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" ) // contextID is the fs package's type for context.Context.Value keys. diff --git a/pkg/sentry/fs/copy_up.go b/pkg/sentry/fs/copy_up.go index 41265704c..9ac62c84d 100644 --- a/pkg/sentry/fs/copy_up.go +++ b/pkg/sentry/fs/copy_up.go @@ -19,11 +19,11 @@ import ( "io" "sync" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // copyUp copies a file in an overlay from a lower filesystem to an diff --git a/pkg/sentry/fs/copy_up_test.go b/pkg/sentry/fs/copy_up_test.go index 54810afca..1d80bf15a 100644 --- a/pkg/sentry/fs/copy_up_test.go +++ b/pkg/sentry/fs/copy_up_test.go @@ -22,10 +22,10 @@ import ( "sync" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - _ "gvisor.googlesource.com/gvisor/pkg/sentry/fs/tmpfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/fs" + _ "gvisor.dev/gvisor/pkg/sentry/fs/tmpfs" + "gvisor.dev/gvisor/pkg/sentry/kernel/contexttest" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) const ( @@ -102,7 +102,7 @@ func makeOverlayTestFiles(t *testing.T) []*overlayTestFile { if err != nil { t.Fatalf("failed to mount tmpfs: %v", err) } - lowerRoot := fs.NewDirent(lower, "") + lowerRoot := fs.NewDirent(ctx, lower, "") // Make a deep set of subdirectories that everyone shares. next := lowerRoot diff --git a/pkg/sentry/fs/dentry.go b/pkg/sentry/fs/dentry.go index 7a2d4b180..6b2699f15 100644 --- a/pkg/sentry/fs/dentry.go +++ b/pkg/sentry/fs/dentry.go @@ -17,7 +17,7 @@ package fs import ( "sort" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/device" ) // DentAttr is the metadata of a directory entry. It is a subset of StableAttr. diff --git a/pkg/sentry/fs/dev/BUILD b/pkg/sentry/fs/dev/BUILD index 6c4fdaba9..80e106e6f 100644 --- a/pkg/sentry/fs/dev/BUILD +++ b/pkg/sentry/fs/dev/BUILD @@ -11,8 +11,9 @@ go_library( "full.go", "null.go", "random.go", + "tty.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/dev", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/dev", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", @@ -20,8 +21,6 @@ go_library( "//pkg/sentry/context", "//pkg/sentry/device", "//pkg/sentry/fs", - "//pkg/sentry/fs/ashmem", - "//pkg/sentry/fs/binder", "//pkg/sentry/fs/fsutil", "//pkg/sentry/fs/ramfs", "//pkg/sentry/fs/tmpfs", diff --git a/pkg/sentry/fs/dev/dev.go b/pkg/sentry/fs/dev/dev.go index 34ac01173..f739c476c 100644 --- a/pkg/sentry/fs/dev/dev.go +++ b/pkg/sentry/fs/dev/dev.go @@ -18,13 +18,11 @@ package dev import ( "math" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ashmem" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/binder" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/tmpfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/fs/tmpfs" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // Memory device numbers are from Linux's drivers/char/mem.c @@ -40,17 +38,25 @@ const ( urandomDevMinor uint32 = 9 ) -func newCharacterDevice(iops fs.InodeOperations, msrc *fs.MountSource) *fs.Inode { - return fs.NewInode(iops, msrc, fs.StableAttr{ - DeviceID: devDevice.DeviceID(), - InodeID: devDevice.NextIno(), - BlockSize: usermem.PageSize, - Type: fs.CharacterDevice, +// TTY major device number comes from include/uapi/linux/major.h. +const ( + ttyDevMinor = 0 + ttyDevMajor = 5 +) + +func newCharacterDevice(ctx context.Context, iops fs.InodeOperations, msrc *fs.MountSource, major uint16, minor uint32) *fs.Inode { + return fs.NewInode(ctx, iops, msrc, fs.StableAttr{ + DeviceID: devDevice.DeviceID(), + InodeID: devDevice.NextIno(), + BlockSize: usermem.PageSize, + Type: fs.CharacterDevice, + DeviceFileMajor: major, + DeviceFileMinor: minor, }) } -func newMemDevice(iops fs.InodeOperations, msrc *fs.MountSource, minor uint32) *fs.Inode { - return fs.NewInode(iops, msrc, fs.StableAttr{ +func newMemDevice(ctx context.Context, iops fs.InodeOperations, msrc *fs.MountSource, minor uint32) *fs.Inode { + return fs.NewInode(ctx, iops, msrc, fs.StableAttr{ DeviceID: devDevice.DeviceID(), InodeID: devDevice.NextIno(), BlockSize: usermem.PageSize, @@ -62,7 +68,7 @@ func newMemDevice(iops fs.InodeOperations, msrc *fs.MountSource, minor uint32) * func newDirectory(ctx context.Context, msrc *fs.MountSource) *fs.Inode { iops := ramfs.NewDir(ctx, nil, fs.RootOwner, fs.FilePermsFromMode(0555)) - return fs.NewInode(iops, msrc, fs.StableAttr{ + return fs.NewInode(ctx, iops, msrc, fs.StableAttr{ DeviceID: devDevice.DeviceID(), InodeID: devDevice.NextIno(), BlockSize: usermem.PageSize, @@ -72,7 +78,7 @@ func newDirectory(ctx context.Context, msrc *fs.MountSource) *fs.Inode { func newSymlink(ctx context.Context, target string, msrc *fs.MountSource) *fs.Inode { iops := ramfs.NewSymlink(ctx, fs.RootOwner, target) - return fs.NewInode(iops, msrc, fs.StableAttr{ + return fs.NewInode(ctx, iops, msrc, fs.StableAttr{ DeviceID: devDevice.DeviceID(), InodeID: devDevice.NextIno(), BlockSize: usermem.PageSize, @@ -81,24 +87,24 @@ func newSymlink(ctx context.Context, target string, msrc *fs.MountSource) *fs.In } // New returns the root node of a device filesystem. -func New(ctx context.Context, msrc *fs.MountSource, binderEnabled bool, ashmemEnabled bool) *fs.Inode { +func New(ctx context.Context, msrc *fs.MountSource) *fs.Inode { contents := map[string]*fs.Inode{ "fd": newSymlink(ctx, "/proc/self/fd", msrc), "stdin": newSymlink(ctx, "/proc/self/fd/0", msrc), "stdout": newSymlink(ctx, "/proc/self/fd/1", msrc), "stderr": newSymlink(ctx, "/proc/self/fd/2", msrc), - "null": newMemDevice(newNullDevice(ctx, fs.RootOwner, 0666), msrc, nullDevMinor), - "zero": newMemDevice(newZeroDevice(ctx, fs.RootOwner, 0666), msrc, zeroDevMinor), - "full": newMemDevice(newFullDevice(ctx, fs.RootOwner, 0666), msrc, fullDevMinor), + "null": newMemDevice(ctx, newNullDevice(ctx, fs.RootOwner, 0666), msrc, nullDevMinor), + "zero": newMemDevice(ctx, newZeroDevice(ctx, fs.RootOwner, 0666), msrc, zeroDevMinor), + "full": newMemDevice(ctx, newFullDevice(ctx, fs.RootOwner, 0666), msrc, fullDevMinor), // This is not as good as /dev/random in linux because go // runtime uses sys_random and /dev/urandom internally. // According to 'man 4 random', this will be sufficient unless // application uses this to generate long-lived GPG/SSL/SSH // keys. - "random": newMemDevice(newRandomDevice(ctx, fs.RootOwner, 0444), msrc, randomDevMinor), - "urandom": newMemDevice(newRandomDevice(ctx, fs.RootOwner, 0444), msrc, urandomDevMinor), + "random": newMemDevice(ctx, newRandomDevice(ctx, fs.RootOwner, 0444), msrc, randomDevMinor), + "urandom": newMemDevice(ctx, newRandomDevice(ctx, fs.RootOwner, 0444), msrc, urandomDevMinor), "shm": tmpfs.NewDir(ctx, nil, fs.RootOwner, fs.FilePermsFromMode(0777), msrc), @@ -116,20 +122,12 @@ func New(ctx context.Context, msrc *fs.MountSource, binderEnabled bool, ashmemEn // If no devpts is mounted, this will simply be a dangling // symlink, which is fine. "ptmx": newSymlink(ctx, "pts/ptmx", msrc), - } - - if binderEnabled { - binder := binder.NewDevice(ctx, fs.RootOwner, fs.FilePermsFromMode(0666)) - contents["binder"] = newCharacterDevice(binder, msrc) - } - if ashmemEnabled { - ashmem := ashmem.NewDevice(ctx, fs.RootOwner, fs.FilePermsFromMode(0666)) - contents["ashmem"] = newCharacterDevice(ashmem, msrc) + "tty": newCharacterDevice(ctx, newTTYDevice(ctx, fs.RootOwner, 0666), msrc, ttyDevMajor, ttyDevMinor), } iops := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return fs.NewInode(iops, msrc, fs.StableAttr{ + return fs.NewInode(ctx, iops, msrc, fs.StableAttr{ DeviceID: devDevice.DeviceID(), InodeID: devDevice.NextIno(), BlockSize: usermem.PageSize, diff --git a/pkg/sentry/fs/dev/device.go b/pkg/sentry/fs/dev/device.go index 9f4e41fc9..a0493474e 100644 --- a/pkg/sentry/fs/dev/device.go +++ b/pkg/sentry/fs/dev/device.go @@ -14,7 +14,7 @@ package dev -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" // devDevice is the pseudo-filesystem device. var devDevice = device.NewAnonDevice() diff --git a/pkg/sentry/fs/dev/fs.go b/pkg/sentry/fs/dev/fs.go index 6096a40f8..55f8af704 100644 --- a/pkg/sentry/fs/dev/fs.go +++ b/pkg/sentry/fs/dev/fs.go @@ -15,19 +15,10 @@ package dev import ( - "strconv" - - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) -// Optional key containing boolean flag which specifies if Android Binder IPC should be enabled. -const binderEnabledKey = "binder_enabled" - -// Optional key containing boolean flag which specifies if Android ashmem should be enabled. -const ashmemEnabledKey = "ashmem_enabled" - // filesystem is a devtmpfs. // // +stateify savable @@ -39,7 +30,7 @@ func init() { fs.RegisterFilesystem(&filesystem{}) } -// FilesystemName is the name underwhich the filesystem is registered. +// FilesystemName is the name under which the filesystem is registered. // Name matches drivers/base/devtmpfs.c:dev_fs_type.name. const FilesystemName = "devtmpfs" @@ -67,33 +58,7 @@ func (*filesystem) Flags() fs.FilesystemFlags { // Mount returns a devtmpfs root that can be positioned in the vfs. func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSourceFlags, data string, _ interface{}) (*fs.Inode, error) { - // device is always ignored. // devtmpfs backed by ramfs ignores bad options. See fs/ramfs/inode.c:ramfs_parse_options. // -> we should consider parsing the mode and backing devtmpfs by this. - - // Parse generic comma-separated key=value options. - options := fs.GenericMountSourceOptions(data) - - // binerEnabledKey is optional and binder is disabled by default. - binderEnabled := false - if beStr, exists := options[binderEnabledKey]; exists { - var err error - binderEnabled, err = strconv.ParseBool(beStr) - if err != nil { - return nil, syserror.EINVAL - } - } - - // ashmemEnabledKey is optional and ashmem is disabled by default. - ashmemEnabled := false - if aeStr, exists := options[ashmemEnabledKey]; exists { - var err error - ashmemEnabled, err = strconv.ParseBool(aeStr) - if err != nil { - return nil, syserror.EINVAL - } - } - - // Construct the devtmpfs root. - return New(ctx, fs.NewNonCachingMountSource(f, flags), binderEnabled, ashmemEnabled), nil + return New(ctx, fs.NewNonCachingMountSource(ctx, f, flags)), nil } diff --git a/pkg/sentry/fs/dev/full.go b/pkg/sentry/fs/dev/full.go index 8f6c6da2d..07e0ea010 100644 --- a/pkg/sentry/fs/dev/full.go +++ b/pkg/sentry/fs/dev/full.go @@ -15,13 +15,13 @@ package dev import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // fullDevice is used to implement /dev/full. diff --git a/pkg/sentry/fs/dev/null.go b/pkg/sentry/fs/dev/null.go index 3f1accef8..4404b97ef 100644 --- a/pkg/sentry/fs/dev/null.go +++ b/pkg/sentry/fs/dev/null.go @@ -15,14 +15,14 @@ package dev import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/waiter" ) // +stateify savable @@ -97,6 +97,7 @@ func newZeroDevice(ctx context.Context, owner fs.FileOwner, mode linux.FileMode) func (zd *zeroDevice) GetFile(ctx context.Context, dirent *fs.Dirent, flags fs.FileFlags) (*fs.File, error) { flags.Pread = true flags.Pwrite = true + flags.NonSeekable = true return fs.NewFile(ctx, dirent, flags, &zeroFileOperations{}), nil } diff --git a/pkg/sentry/fs/dev/random.go b/pkg/sentry/fs/dev/random.go index e5a01a906..49cb92f6e 100644 --- a/pkg/sentry/fs/dev/random.go +++ b/pkg/sentry/fs/dev/random.go @@ -15,14 +15,14 @@ package dev import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/rand" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/rand" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/waiter" ) // +stateify savable diff --git a/pkg/sentry/fs/dev/tty.go b/pkg/sentry/fs/dev/tty.go new file mode 100644 index 000000000..87d80e292 --- /dev/null +++ b/pkg/sentry/fs/dev/tty.go @@ -0,0 +1,67 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package dev + +import ( + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/waiter" +) + +// +stateify savable +type ttyInodeOperations struct { + fsutil.InodeGenericChecker `state:"nosave"` + fsutil.InodeNoExtendedAttributes `state:"nosave"` + fsutil.InodeNoopAllocate `state:"nosave"` + fsutil.InodeNoopRelease `state:"nosave"` + fsutil.InodeNoopTruncate `state:"nosave"` + fsutil.InodeNoopWriteOut `state:"nosave"` + fsutil.InodeNotDirectory `state:"nosave"` + fsutil.InodeNotMappable `state:"nosave"` + fsutil.InodeNotOpenable `state:"nosave"` + fsutil.InodeNotSocket `state:"nosave"` + fsutil.InodeNotSymlink `state:"nosave"` + fsutil.InodeVirtual `state:"nosave"` + + fsutil.InodeSimpleAttributes +} + +var _ fs.InodeOperations = (*ttyInodeOperations)(nil) + +func newTTYDevice(ctx context.Context, owner fs.FileOwner, mode linux.FileMode) *ttyInodeOperations { + return &ttyInodeOperations{ + InodeSimpleAttributes: fsutil.NewInodeSimpleAttributes(ctx, owner, fs.FilePermsFromMode(mode), linux.TMPFS_MAGIC), + } +} + +// +stateify savable +type ttyFileOperations struct { + fsutil.FileNoSeek `state:"nosave"` + fsutil.FileNoIoctl `state:"nosave"` + fsutil.FileNoMMap `state:"nosave"` + fsutil.FileNoSplice `state:"nosave"` + fsutil.FileNoopFlush `state:"nosave"` + fsutil.FileNoopFsync `state:"nosave"` + fsutil.FileNoopRelease `state:"nosave"` + fsutil.FileNoopWrite `state:"nosave"` + fsutil.FileNoopRead `state:"nosave"` + fsutil.FileNotDirReaddir `state:"nosave"` + fsutil.FileUseInodeUnstableAttr `state:"nosave"` + waiter.AlwaysReady `state:"nosave"` +} + +var _ fs.FileOperations = (*ttyFileOperations)(nil) diff --git a/pkg/sentry/fs/dirent.go b/pkg/sentry/fs/dirent.go index a0a35c242..fbca06761 100644 --- a/pkg/sentry/fs/dirent.go +++ b/pkg/sentry/fs/dirent.go @@ -22,13 +22,13 @@ import ( "sync/atomic" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/uniqueid" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/uniqueid" + "gvisor.dev/gvisor/pkg/syserror" ) type globalDirentMap struct { @@ -206,7 +206,7 @@ type Dirent struct { // NewDirent returns a new root Dirent, taking the caller's reference on inode. The caller // holds the only reference to the Dirent. Parents may call hashChild to parent this Dirent. -func NewDirent(inode *Inode, name string) *Dirent { +func NewDirent(ctx context.Context, inode *Inode, name string) *Dirent { d := newDirent(inode, name) allDirents.add(d) d.userVisible = true @@ -229,11 +229,13 @@ func newDirent(inode *Inode, name string) *Dirent { if inode != nil { inode.MountSource.IncDirentRefs() } - return &Dirent{ + d := Dirent{ Inode: inode, name: name, children: make(map[string]*refs.WeakRef), } + d.EnableLeakCheck("fs.Dirent") + return &d } // NewNegativeDirent returns a new root negative Dirent. Otherwise same as NewDirent. @@ -918,7 +920,7 @@ type DirIterator interface { // calls, and must start with the given offset. // // The caller must ensure that this operation is permitted. - IterateDir(ctx context.Context, dirCtx *DirCtx, offset int) (int, error) + IterateDir(ctx context.Context, d *Dirent, dirCtx *DirCtx, offset int) (int, error) } // DirentReaddir serializes the directory entries of d including "." and "..". @@ -948,9 +950,6 @@ func direntReaddir(ctx context.Context, d *Dirent, it DirIterator, root *Dirent, if dirCtx.Serializer == nil { panic("Dirent.Readdir: serializer must not be nil") } - if d.frozen { - return d.readdirFrozen(root, offset, dirCtx) - } // Check that this is actually a directory before emitting anything. // Once we have written entries for "." and "..", future errors from @@ -959,6 +958,16 @@ func direntReaddir(ctx context.Context, d *Dirent, it DirIterator, root *Dirent, return 0, syserror.ENOTDIR } + // This is a special case for lseek(fd, 0, SEEK_END). + // See SeekWithDirCursor for more details. + if offset == FileMaxOffset { + return offset, nil + } + + if d.frozen { + return d.readdirFrozen(root, offset, dirCtx) + } + // Collect attrs for "." and "..". dot, dotdot := d.GetDotAttrs(root) @@ -981,7 +990,7 @@ func direntReaddir(ctx context.Context, d *Dirent, it DirIterator, root *Dirent, // it.IterateDir should be passed an offset that does not include the // initial dot elements. We will add them back later. offset -= 2 - newOffset, err := it.IterateDir(ctx, dirCtx, int(offset)) + newOffset, err := it.IterateDir(ctx, d, dirCtx, int(offset)) if int64(newOffset) < offset { panic(fmt.Sprintf("node.Readdir returned offset %v less than input offset %v", newOffset, offset)) } @@ -1068,7 +1077,7 @@ func (d *Dirent) mount(ctx context.Context, inode *Inode) (newChild *Dirent, err // // Note that NewDirent returns with one reference taken; the reference // is donated to the caller as the mount reference. - replacement := NewDirent(inode, d.name) + replacement := NewDirent(ctx, inode, d.name) replacement.mounted = true weakRef, ok := d.parent.hashChild(replacement) diff --git a/pkg/sentry/fs/dirent_cache.go b/pkg/sentry/fs/dirent_cache.go index 71f2d11de..60a15a275 100644 --- a/pkg/sentry/fs/dirent_cache.go +++ b/pkg/sentry/fs/dirent_cache.go @@ -146,7 +146,7 @@ func (c *DirentCache) contains(d *Dirent) bool { return c.list.Front() == d } -// Invalidate removes all Dirents from the cache, caling DecRef on each. +// Invalidate removes all Dirents from the cache, calling DecRef on each. func (c *DirentCache) Invalidate() { if c == nil { return @@ -159,7 +159,7 @@ func (c *DirentCache) Invalidate() { } // setMaxSize sets cache max size. If current size is larger than max size, the -// cache shrinks to acommodate the new max. +// cache shrinks to accommodate the new max. func (c *DirentCache) setMaxSize(max uint64) { c.mu.Lock() c.maxSize = max diff --git a/pkg/sentry/fs/dirent_refs_test.go b/pkg/sentry/fs/dirent_refs_test.go index db88d850e..884e3ff06 100644 --- a/pkg/sentry/fs/dirent_refs_test.go +++ b/pkg/sentry/fs/dirent_refs_test.go @@ -18,8 +18,8 @@ import ( "syscall" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" ) func newMockDirInode(ctx context.Context, cache *DirentCache) *Inode { @@ -31,7 +31,7 @@ func TestWalkPositive(t *testing.T) { // refs == -1 -> has been destroyed. ctx := contexttest.Context(t) - root := NewDirent(newMockDirInode(ctx, nil), "root") + root := NewDirent(ctx, newMockDirInode(ctx, nil), "root") if got := root.ReadRefs(); got != 1 { t.Fatalf("root has a ref count of %d, want %d", got, 1) @@ -73,7 +73,7 @@ func TestWalkNegative(t *testing.T) { // refs == -1 -> has been destroyed. ctx := contexttest.Context(t) - root := NewDirent(NewEmptyDir(ctx, nil), "root") + root := NewDirent(ctx, NewEmptyDir(ctx, nil), "root") mn := root.Inode.InodeOperations.(*mockInodeOperationsLookupNegative) if got := root.ReadRefs(); got != 1 { @@ -144,7 +144,7 @@ type mockInodeOperationsLookupNegative struct { func NewEmptyDir(ctx context.Context, cache *DirentCache) *Inode { m := NewMockMountSource(cache) - return NewInode(&mockInodeOperationsLookupNegative{ + return NewInode(ctx, &mockInodeOperationsLookupNegative{ MockInodeOperations: NewMockInodeOperations(ctx), }, m, StableAttr{Type: Directory}) } @@ -162,7 +162,7 @@ func TestHashNegativeToPositive(t *testing.T) { // refs == -1 -> has been destroyed. ctx := contexttest.Context(t) - root := NewDirent(NewEmptyDir(ctx, nil), "root") + root := NewDirent(ctx, NewEmptyDir(ctx, nil), "root") name := "d" _, err := root.walk(ctx, root, name, false) @@ -215,7 +215,6 @@ func TestRevalidate(t *testing.T) { // refs == 0 -> one reference. // refs == -1 -> has been destroyed. - ctx := contexttest.Context(t) for _, test := range []struct { // desc is the test's description. desc string @@ -233,7 +232,8 @@ func TestRevalidate(t *testing.T) { }, } { t.Run(test.desc, func(t *testing.T) { - root := NewDirent(NewMockInodeRevalidate(ctx, test.makeNegative), "root") + ctx := contexttest.Context(t) + root := NewDirent(ctx, NewMockInodeRevalidate(ctx, test.makeNegative), "root") name := "d" d1, err := root.walk(ctx, root, name, false) @@ -263,7 +263,7 @@ func NewMockInodeRevalidate(ctx context.Context, makeNegative bool) *Inode { mn := NewMockInodeOperations(ctx) m := NewMockMountSource(nil) m.MountSourceOperations.(*MockMountSourceOps).revalidate = true - return NewInode(&MockInodeOperationsRevalidate{MockInodeOperations: mn, makeNegative: makeNegative}, m, StableAttr{Type: Directory}) + return NewInode(ctx, &MockInodeOperationsRevalidate{MockInodeOperations: mn, makeNegative: makeNegative}, m, StableAttr{Type: Directory}) } func (m *MockInodeOperationsRevalidate) Lookup(ctx context.Context, dir *Inode, p string) (*Dirent, error) { @@ -290,12 +290,12 @@ func TestCreateExtraRefs(t *testing.T) { }{ { desc: "Create caching", - root: NewDirent(NewEmptyDir(ctx, NewDirentCache(1)), "root"), + root: NewDirent(ctx, NewEmptyDir(ctx, NewDirentCache(1)), "root"), refs: 2, }, { desc: "Create not caching", - root: NewDirent(NewEmptyDir(ctx, nil), "root"), + root: NewDirent(ctx, NewEmptyDir(ctx, nil), "root"), refs: 1, }, } { @@ -328,11 +328,11 @@ func TestRemoveExtraRefs(t *testing.T) { }{ { desc: "Remove caching", - root: NewDirent(NewEmptyDir(ctx, NewDirentCache(1)), "root"), + root: NewDirent(ctx, NewEmptyDir(ctx, NewDirentCache(1)), "root"), }, { desc: "Remove not caching", - root: NewDirent(NewEmptyDir(ctx, nil), "root"), + root: NewDirent(ctx, NewEmptyDir(ctx, nil), "root"), }, } { t.Run(test.desc, func(t *testing.T) { @@ -366,7 +366,6 @@ func TestRenameExtraRefs(t *testing.T) { // refs == 0 -> one reference. // refs == -1 -> has been destroyed. - ctx := contexttest.Context(t) for _, test := range []struct { // desc is the test's description. desc string @@ -384,10 +383,12 @@ func TestRenameExtraRefs(t *testing.T) { }, } { t.Run(test.desc, func(t *testing.T) { + ctx := contexttest.Context(t) + dirAttr := StableAttr{Type: Directory} - oldParent := NewDirent(NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "old_parent") - newParent := NewDirent(NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "new_parent") + oldParent := NewDirent(ctx, NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "old_parent") + newParent := NewDirent(ctx, NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "new_parent") renamed, err := oldParent.Walk(ctx, oldParent, "old_child") if err != nil { diff --git a/pkg/sentry/fs/dirent_state.go b/pkg/sentry/fs/dirent_state.go index 18652b809..f623d6c0e 100644 --- a/pkg/sentry/fs/dirent_state.go +++ b/pkg/sentry/fs/dirent_state.go @@ -18,7 +18,7 @@ import ( "fmt" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/refs" ) // beforeSave is invoked by stateify. diff --git a/pkg/sentry/fs/ext/BUILD b/pkg/sentry/fs/ext/BUILD new file mode 100644 index 000000000..3c2a02eac --- /dev/null +++ b/pkg/sentry/fs/ext/BUILD @@ -0,0 +1,11 @@ +package(licenses = ["notice"]) + +load("//tools/go_stateify:defs.bzl", "go_library") + +go_library( + name = "ext", + srcs = ["ext.go"], + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/ext", + visibility = ["//pkg/sentry:internal"], + deps = ["//pkg/sentry/fs/ext/disklayout"], +) diff --git a/pkg/sentry/fs/ext/assets/README.md b/pkg/sentry/fs/ext/assets/README.md new file mode 100644 index 000000000..b6eac4f40 --- /dev/null +++ b/pkg/sentry/fs/ext/assets/README.md @@ -0,0 +1,28 @@ +### Tiny Ext4 Image + +The image is of size 64Kb which supports 64 1k blocks and 16 inodes. This is the +smallest size mkfs.ext4 works with. + +This image was generated using the following commands. + +```bash +fallocate -l 64K tiny.ext4 +mkfs.ext4 -j tiny.ext4 +``` + +You can mount it using: + +```bash +sudo mount -o loop tiny.ext4 $MOUNTPOINT +``` + +`file.txt`, `bigfile.txt` and `symlink.txt` were added to this image by just +mounting it and copying (while preserving links) those files to the mountpoint +directory using: + +```bash +sudo cp -P {file.txt,symlink.txt,bigfile.txt} $MOUNTPOINT/ +``` + +The files in this directory mirror the contents and organisation of the files +stored in the image. diff --git a/pkg/sentry/fs/ext/assets/bigfile.txt b/pkg/sentry/fs/ext/assets/bigfile.txt new file mode 100644 index 000000000..3857cf516 --- /dev/null +++ b/pkg/sentry/fs/ext/assets/bigfile.txt @@ -0,0 +1,41 @@ +Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus faucibus eleifend orci, ut ornare nibh faucibus eu. Cras at condimentum massa. Nullam luctus, elit non porttitor congue, sapien diam feugiat sapien, sed eleifend nulla mauris non arcu. Sed lacinia mauris magna, eu mollis libero varius sit amet. Donec mollis, quam convallis commodo posuere, dolor nisi placerat nisi, in faucibus augue mi eu lorem. In pharetra consectetur faucibus. Ut euismod ex efficitur egestas tincidunt. Maecenas condimentum ut ante in rutrum. Vivamus sed arcu tempor, faucibus turpis et, lacinia diam. + +Sed in lacus vel nisl interdum bibendum in sed justo. Nunc tellus risus, molestie vitae arcu sed, molestie tempus ligula. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nunc risus neque, volutpat et ante non, ullamcorper condimentum ante. Aliquam sed metus in urna condimentum convallis. Vivamus ut libero mauris. Proin mollis posuere consequat. Vestibulum placerat mollis est et pulvinar. + +Donec rutrum odio ac diam pharetra, id fermentum magna cursus. Pellentesque in dapibus elit, et condimentum orci. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Suspendisse euismod dapibus est, id vestibulum mauris. Nulla facilisi. Nulla cursus gravida nisi. Phasellus vestibulum rutrum lectus, a dignissim mauris hendrerit vitae. In at elementum mauris. Integer vel efficitur velit. Nullam fringilla sapien mi, quis luctus neque efficitur ac. Aenean nec quam dapibus nunc commodo pharetra. Proin sapien mi, fermentum aliquet vulputate non, aliquet porttitor diam. Quisque lacinia, urna et finibus fermentum, nunc lacus vehicula ex, sed congue metus lectus ac quam. Aliquam erat volutpat. Suspendisse sodales, dolor ut tincidunt finibus, augue erat varius tellus, a interdum erat sem at nunc. Vestibulum cursus iaculis sapien, vitae feugiat dui auctor quis. + +Pellentesque nec maximus nulla, eu blandit diam. Maecenas quis arcu ornare, congue ante at, vehicula ipsum. Praesent feugiat mauris rutrum sem fermentum, nec luctus ipsum placerat. Pellentesque placerat ipsum at dignissim fringilla. Vivamus et posuere sem, eget hendrerit felis. Aenean vulputate, augue vel mollis feugiat, justo ipsum mollis dolor, eu mollis elit neque ut ipsum. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Fusce bibendum sem quam, vulputate laoreet mi dapibus imperdiet. Sed a purus non nibh pretium aliquet. Integer eget luctus augue, vitae tincidunt magna. Ut eros enim, egestas eu nulla et, lobortis egestas arcu. Cras id ipsum ac justo lacinia rutrum. Vivamus lectus leo, ultricies sed justo at, pellentesque feugiat magna. Ut sollicitudin neque elit, vel ornare mauris commodo id. + +Duis dapibus orci et sapien finibus finibus. Mauris eleifend, lacus at vestibulum maximus, quam ligula pharetra erat, sit amet dapibus neque elit vitae neque. In bibendum sollicitudin erat, eget ultricies tortor malesuada at. Sed sit amet orci turpis. Donec feugiat ligula nibh, molestie tincidunt lectus elementum id. Donec volutpat maximus nibh, in vulputate felis posuere eu. Cras tincidunt ullamcorper lacus. Phasellus porta lorem auctor, congue magna a, commodo elit. + +Etiam auctor mi quis elit sodales, eu pulvinar arcu condimentum. Aenean imperdiet risus et dapibus tincidunt. Nullam tincidunt dictum dui, sed commodo urna rutrum id. Ut mollis libero vel elit laoreet bibendum. Quisque arcu arcu, tincidunt at ultricies id, vulputate nec metus. In tristique posuere quam sit amet volutpat. Vivamus scelerisque et nunc at dapibus. Fusce finibus libero ut ligula pretium rhoncus. Mauris non elit in arcu finibus imperdiet. Pellentesque nec massa odio. Proin rutrum mauris non sagittis efficitur. Aliquam auctor quam at dignissim faucibus. Ut eget ligula in magna posuere ultricies vitae sit amet turpis. Duis maximus odio nulla. Donec gravida sem tristique tempus scelerisque. + +Interdum et malesuada fames ac ante ipsum primis in faucibus. Fusce pharetra magna vulputate aliquet tempus. Duis id hendrerit arcu. Quisque ut ex elit. Integer velit orci, venenatis ut sapien ac, placerat porttitor dui. Interdum et malesuada fames ac ante ipsum primis in faucibus. Nunc hendrerit cursus diam, hendrerit finibus ipsum scelerisque ut. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. + +Nulla non euismod neque. Phasellus vel sapien eu metus pulvinar rhoncus. Suspendisse eu mollis tellus, quis vestibulum tortor. Maecenas interdum dolor sed nulla fermentum maximus. Donec imperdiet ullamcorper condimentum. Nam quis nibh ante. Praesent quis tellus ut tortor pulvinar blandit sit amet ut sapien. Vestibulum est orci, pellentesque vitae tristique sit amet, tristique non felis. + +Vivamus sodales pellentesque varius. Sed vel tempus ligula. Nulla tristique nisl vel dui facilisis, ac sodales augue hendrerit. Proin augue nisi, vestibulum quis augue nec, sagittis tincidunt velit. Vestibulum euismod, nulla nec sodales faucibus, urna sapien vulputate magna, id varius metus sapien ut neque. Duis in mollis urna, in scelerisque enim. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nunc condimentum dictum turpis, et egestas neque dapibus eget. Quisque fringilla, dui eu venenatis eleifend, erat nibh lacinia urna, at lacinia lacus sapien eu dui. Duis eu erat ut mi lacinia convallis a sed ex. + +Fusce elit metus, tincidunt nec eleifend a, hendrerit nec ligula. Duis placerat finibus sollicitudin. In euismod porta tellus, in luctus justo bibendum bibendum. Maecenas at magna eleifend lectus tincidunt suscipit ut a ligula. Nulla tempor accumsan felis, fermentum dapibus est eleifend vitae. Mauris urna sem, fringilla at ultricies non, ultrices in arcu. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Nam vehicula nunc at laoreet imperdiet. Nunc tristique ut risus id aliquet. Integer eleifend massa orci. + +Vestibulum sed ante sollicitudin nisi fringilla bibendum nec vel quam. Sed pretium augue eu ligula congue pulvinar. Donec vitae magna tincidunt, pharetra lacus id, convallis nulla. Cras viverra nisl nisl, varius convallis leo vulputate nec. Morbi at consequat dui, sed aliquet metus. Sed suscipit fermentum mollis. Maecenas nec mi sodales, tincidunt purus in, tristique mauris. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec interdum mi in velit efficitur, quis ultrices ex imperdiet. Sed vestibulum, magna ut tristique pretium, mi ipsum placerat tellus, non tempor enim augue et ex. Pellentesque eget felis quis ante sodales viverra ac sed lacus. Donec suscipit tempus massa, eget laoreet massa molestie at. + +Aenean fringilla dui non aliquet consectetur. Fusce cursus quam nec orci hendrerit faucibus. Donec consequat suscipit enim, non volutpat lectus auctor interdum. Proin lorem purus, maximus vel orci vitae, suscipit egestas turpis. Donec risus urna, congue a sem eu, aliquet placerat odio. Morbi gravida tristique turpis, quis efficitur enim. Nunc interdum gravida ipsum vel facilisis. Nunc congue finibus sollicitudin. Quisque euismod aliquet lectus et tincidunt. Curabitur ultrices sem ut mi fringilla fermentum. Morbi pretium, nisi sit amet dapibus congue, dolor enim consectetur risus, a interdum ligula odio sed odio. Quisque facilisis, mi at suscipit gravida, nunc sapien cursus justo, ut luctus odio nulla quis leo. Integer condimentum lobortis mauris, non egestas tellus lobortis sit amet. + +In sollicitudin velit ac ante vehicula, vitae varius tortor mollis. In hac habitasse platea dictumst. Quisque et orci lorem. Integer malesuada fringilla luctus. Pellentesque malesuada, mi non lobortis porttitor, ante ligula vulputate ante, nec dictum risus eros sit amet sapien. Nulla aliquam lorem libero, ac varius nulla tristique eget. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Ut pellentesque mauris orci, vel consequat mi varius a. Ut sit amet elit vulputate, lacinia metus non, fermentum nisl. Pellentesque eu nisi sed quam egestas blandit. Duis sit amet lobortis dolor. Donec consectetur sem interdum, tristique elit sit amet, sodales lacus. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Fusce id aliquam augue. Sed pretium congue risus vitae lacinia. Vestibulum non vulputate risus, ut malesuada justo. + +Sed odio elit, consectetur ac mauris quis, consequat commodo libero. Fusce sodales velit vulputate pulvinar fermentum. Donec iaculis nec nisl eget faucibus. Mauris at dictum velit. Donec fermentum lectus eu viverra volutpat. Aliquam consequat facilisis lorem, cursus consequat dui bibendum ullamcorper. Pellentesque nulla magna, imperdiet at magna et, cursus egestas enim. Nullam semper molestie lectus sit amet semper. Duis eget tincidunt est. Integer id neque risus. Integer ultricies hendrerit vestibulum. Donec blandit blandit sagittis. Nunc consectetur vitae nisi consectetur volutpat. + +Nulla id lorem fermentum, efficitur magna a, hendrerit dui. Vivamus sagittis orci gravida, bibendum quam eget, molestie est. Phasellus nec enim tincidunt, volutpat sapien non, laoreet diam. Nulla posuere enim nec porttitor lobortis. Donec auctor odio ut orci eleifend, ut eleifend purus convallis. Interdum et malesuada fames ac ante ipsum primis in faucibus. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut hendrerit, purus eget viverra tincidunt, sem magna imperdiet libero, et aliquam turpis neque vitae elit. Maecenas semper varius iaculis. Cras non lorem quis quam bibendum eleifend in et libero. Curabitur at purus mauris. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus porta diam sed elit eleifend gravida. + +Nulla facilisi. Ut ultricies diam vel diam consectetur, vel porta augue molestie. Fusce interdum sapien et metus facilisis pellentesque. Nulla convallis sem at nunc vehicula facilisis. Nam ac rutrum purus. Nunc bibendum, dolor sit amet tempus ullamcorper, lorem leo tempor sem, id fringilla nunc augue scelerisque augue. Nullam sit amet rutrum nisl. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Donec sed mauris gravida eros vehicula sagittis at eget orci. Cras elementum, eros at accumsan bibendum, libero neque blandit purus, vitae vestibulum libero massa ac nibh. Integer at placerat nulla. Mauris eu eleifend orci. Aliquam consequat ligula vitae erat porta lobortis. Duis fermentum elit ac aliquet ornare. + +Mauris eget cursus tellus, eget sodales purus. Aliquam malesuada, augue id vulputate finibus, nisi ex bibendum nisl, sit amet laoreet quam urna a dolor. Nullam ultricies, sapien eu laoreet consequat, erat eros dignissim diam, ultrices sodales lectus mauris et leo. Morbi lacinia eu ante at tempus. Sed iaculis finibus magna malesuada efficitur. Donec faucibus erat sit amet elementum feugiat. Praesent a placerat nisi. Etiam lacinia gravida diam, et sollicitudin sapien tincidunt ut. + +Maecenas felis quam, tincidunt vitae venenatis scelerisque, viverra vitae odio. Phasellus enim neque, ultricies suscipit malesuada sit amet, vehicula sit amet purus. Nulla placerat sit amet dui vel tincidunt. Nam quis neque vel magna commodo egestas. Vestibulum sagittis rutrum lorem ut congue. Maecenas vel ultrices tellus. Donec efficitur, urna ac consequat iaculis, lorem felis pharetra eros, eget faucibus orci lectus sit amet arcu. + +Ut a tempus nisi. Nulla facilisi. Praesent vulputate maximus mi et dapibus. Sed sit amet libero ac augue hendrerit efficitur in a sapien. Mauris placerat velit sit amet tellus sollicitudin faucibus. Donec egestas a magna ac suscipit. Duis enim sapien, mollis sed egestas et, vestibulum vel leo. + +Proin quis dapibus dui. Donec eu tincidunt nunc. Vivamus eget purus consectetur, maximus ante vitae, tincidunt elit. Aenean mattis dolor a gravida aliquam. Praesent quis tellus id sem maximus vulputate nec sed nulla. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur metus nulla, volutpat volutpat est eu, hendrerit congue erat. Aliquam sollicitudin augue ante. Sed sollicitudin, magna eu consequat elementum, mi augue ullamcorper felis, molestie imperdiet erat metus iaculis est. Proin ac tortor nisi. Pellentesque quis nisi risus. Integer enim sapien, tincidunt quis tortor id, accumsan venenatis mi. Nulla facilisi. + +Cras pretium sit amet quam congue maximus. Morbi lacus libero, imperdiet commodo massa sed, scelerisque placerat libero. Cras nisl nisi, consectetur sed bibendum eu, venenatis at enim. Proin sodales justo at quam aliquam, a consectetur mi ornare. Donec porta ac est sit amet efficitur. Suspendisse vestibulum tortor id neque imperdiet, id lacinia risus vehicula. Phasellus ac eleifend purus. Mauris vel gravida ante. Aliquam vitae lobortis risus. Sed vehicula consectetur tincidunt. Nam et justo vitae purus molestie consequat. Pellentesque ipsum ex, convallis quis blandit non, gravida et urna. Donec diam ligula amet. diff --git a/pkg/sentry/fs/ext/assets/file.txt b/pkg/sentry/fs/ext/assets/file.txt new file mode 100644 index 000000000..980a0d5f1 --- /dev/null +++ b/pkg/sentry/fs/ext/assets/file.txt @@ -0,0 +1 @@ +Hello World! diff --git a/pkg/sentry/fs/ext/assets/symlink.txt b/pkg/sentry/fs/ext/assets/symlink.txt new file mode 120000 index 000000000..4c330738c --- /dev/null +++ b/pkg/sentry/fs/ext/assets/symlink.txt @@ -0,0 +1 @@ +file.txt
\ No newline at end of file diff --git a/pkg/sentry/fs/ext/assets/tiny.ext4 b/pkg/sentry/fs/ext/assets/tiny.ext4 Binary files differnew file mode 100644 index 000000000..a6859736d --- /dev/null +++ b/pkg/sentry/fs/ext/assets/tiny.ext4 diff --git a/pkg/sentry/fs/ext/disklayout/BUILD b/pkg/sentry/fs/ext/disklayout/BUILD new file mode 100644 index 000000000..e4cb26645 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/BUILD @@ -0,0 +1,46 @@ +package(licenses = ["notice"]) + +load("//tools/go_stateify:defs.bzl", "go_library", "go_test") + +go_library( + name = "disklayout", + srcs = [ + "block_group.go", + "block_group_32.go", + "block_group_64.go", + "dirent.go", + "dirent_new.go", + "dirent_old.go", + "disklayout.go", + "inode.go", + "inode_new.go", + "inode_old.go", + "superblock.go", + "superblock_32.go", + "superblock_64.go", + "superblock_old.go", + "test_utils.go", + ], + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/ext/disklayout", + visibility = ["//pkg/sentry:internal"], + deps = [ + "//pkg/abi/linux", + "//pkg/binary", + "//pkg/sentry/fs", + "//pkg/sentry/kernel/auth", + "//pkg/sentry/kernel/time", + ], +) + +go_test( + name = "disklayout_test", + size = "small", + srcs = [ + "block_group_test.go", + "dirent_test.go", + "inode_test.go", + "superblock_test.go", + ], + embed = [":disklayout"], + deps = ["//pkg/sentry/kernel/time"], +) diff --git a/pkg/sentry/fs/ext/disklayout/block_group.go b/pkg/sentry/fs/ext/disklayout/block_group.go new file mode 100644 index 000000000..32ea3d97d --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/block_group.go @@ -0,0 +1,127 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +// BlockGroup represents a Linux ext block group descriptor. An ext file system +// is split into a series of block groups. This provides an access layer to +// information needed to access and use a block group. +// +// See https://www.kernel.org/doc/html/latest/filesystems/ext4/globals.html#block-group-descriptors. +type BlockGroup interface { + // InodeTable returns the absolute block number of the block containing the + // inode table. This points to an array of Inode structs. Inode tables are + // statically allocated at mkfs time. The superblock records the number of + // inodes per group (length of this table) and the size of each inode struct. + InodeTable() uint64 + + // BlockBitmap returns the absolute block number of the block containing the + // block bitmap. This bitmap tracks the usage of data blocks within this block + // group and has its own checksum. + BlockBitmap() uint64 + + // InodeBitmap returns the absolute block number of the block containing the + // inode bitmap. This bitmap tracks the usage of this group's inode table + // entries and has its own checksum. + InodeBitmap() uint64 + + // ExclusionBitmap returns the absolute block number of the snapshot exclusion + // bitmap. + ExclusionBitmap() uint64 + + // FreeBlocksCount returns the number of free blocks in the group. + FreeBlocksCount() uint32 + + // FreeInodesCount returns the number of free inodes in the group. + FreeInodesCount() uint32 + + // DirectoryCount returns the number of inodes that represent directories + // under this block group. + DirectoryCount() uint32 + + // UnusedInodeCount returns the number of unused inodes beyond the last used + // inode in this group's inode table. As a result, we needn’t scan past the + // (InodesPerGroup - UnusedInodeCount())th entry in the inode table. + UnusedInodeCount() uint32 + + // BlockBitmapChecksum returns the block bitmap checksum. This is calculated + // using crc32c(FS UUID + group number + entire bitmap). + BlockBitmapChecksum() uint32 + + // InodeBitmapChecksum returns the inode bitmap checksum. This is calculated + // using crc32c(FS UUID + group number + entire bitmap). + InodeBitmapChecksum() uint32 + + // Checksum returns this block group's checksum. + // + // If SbMetadataCsum feature is set: + // - checksum is crc32c(FS UUID + group number + group descriptor + // structure) & 0xFFFF. + // + // If SbGdtCsum feature is set: + // - checksum is crc16(FS UUID + group number + group descriptor + // structure). + // + // SbMetadataCsum and SbGdtCsum should not be both set. + // If they are, Linux warns and asks to run fsck. + Checksum() uint16 + + // Flags returns BGFlags which represents the block group flags. + Flags() BGFlags +} + +// These are the different block group flags. +const ( + // BgInodeUninit indicates that inode table and bitmap are not initialized. + BgInodeUninit uint16 = 0x1 + + // BgBlockUninit indicates that block bitmap is not initialized. + BgBlockUninit uint16 = 0x2 + + // BgInodeZeroed indicates that inode table is zeroed. + BgInodeZeroed uint16 = 0x4 +) + +// BGFlags represents all the different combinations of block group flags. +type BGFlags struct { + InodeUninit bool + BlockUninit bool + InodeZeroed bool +} + +// ToInt converts a BGFlags struct back to its 16-bit representation. +func (f BGFlags) ToInt() uint16 { + var res uint16 + + if f.InodeUninit { + res |= BgInodeUninit + } + if f.BlockUninit { + res |= BgBlockUninit + } + if f.InodeZeroed { + res |= BgInodeZeroed + } + + return res +} + +// BGFlagsFromInt converts the 16-bit flag representation to a BGFlags struct. +func BGFlagsFromInt(flags uint16) BGFlags { + return BGFlags{ + InodeUninit: flags&BgInodeUninit > 0, + BlockUninit: flags&BgBlockUninit > 0, + InodeZeroed: flags&BgInodeZeroed > 0, + } +} diff --git a/pkg/sentry/fs/ext/disklayout/block_group_32.go b/pkg/sentry/fs/ext/disklayout/block_group_32.go new file mode 100644 index 000000000..3e16c76db --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/block_group_32.go @@ -0,0 +1,72 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +// BlockGroup32Bit emulates the first half of struct ext4_group_desc in +// fs/ext4/ext4.h. It is the block group descriptor struct for ext2, ext3 and +// 32-bit ext4 filesystems. It implements BlockGroup interface. +type BlockGroup32Bit struct { + BlockBitmapLo uint32 + InodeBitmapLo uint32 + InodeTableLo uint32 + FreeBlocksCountLo uint16 + FreeInodesCountLo uint16 + UsedDirsCountLo uint16 + FlagsRaw uint16 + ExcludeBitmapLo uint32 + BlockBitmapChecksumLo uint16 + InodeBitmapChecksumLo uint16 + ItableUnusedLo uint16 + ChecksumRaw uint16 +} + +// Compiles only if BlockGroup32Bit implements BlockGroup. +var _ BlockGroup = (*BlockGroup32Bit)(nil) + +// InodeTable implements BlockGroup.InodeTable. +func (bg *BlockGroup32Bit) InodeTable() uint64 { return uint64(bg.InodeTableLo) } + +// BlockBitmap implements BlockGroup.BlockBitmap. +func (bg *BlockGroup32Bit) BlockBitmap() uint64 { return uint64(bg.BlockBitmapLo) } + +// InodeBitmap implements BlockGroup.InodeBitmap. +func (bg *BlockGroup32Bit) InodeBitmap() uint64 { return uint64(bg.InodeBitmapLo) } + +// ExclusionBitmap implements BlockGroup.ExclusionBitmap. +func (bg *BlockGroup32Bit) ExclusionBitmap() uint64 { return uint64(bg.ExcludeBitmapLo) } + +// FreeBlocksCount implements BlockGroup.FreeBlocksCount. +func (bg *BlockGroup32Bit) FreeBlocksCount() uint32 { return uint32(bg.FreeBlocksCountLo) } + +// FreeInodesCount implements BlockGroup.FreeInodesCount. +func (bg *BlockGroup32Bit) FreeInodesCount() uint32 { return uint32(bg.FreeInodesCountLo) } + +// DirectoryCount implements BlockGroup.DirectoryCount. +func (bg *BlockGroup32Bit) DirectoryCount() uint32 { return uint32(bg.UsedDirsCountLo) } + +// UnusedInodeCount implements BlockGroup.UnusedInodeCount. +func (bg *BlockGroup32Bit) UnusedInodeCount() uint32 { return uint32(bg.ItableUnusedLo) } + +// BlockBitmapChecksum implements BlockGroup.BlockBitmapChecksum. +func (bg *BlockGroup32Bit) BlockBitmapChecksum() uint32 { return uint32(bg.BlockBitmapChecksumLo) } + +// InodeBitmapChecksum implements BlockGroup.InodeBitmapChecksum. +func (bg *BlockGroup32Bit) InodeBitmapChecksum() uint32 { return uint32(bg.InodeBitmapChecksumLo) } + +// Checksum implements BlockGroup.Checksum. +func (bg *BlockGroup32Bit) Checksum() uint16 { return bg.ChecksumRaw } + +// Flags implements BlockGroup.Flags. +func (bg *BlockGroup32Bit) Flags() BGFlags { return BGFlagsFromInt(bg.FlagsRaw) } diff --git a/pkg/sentry/fs/ext/disklayout/block_group_64.go b/pkg/sentry/fs/ext/disklayout/block_group_64.go new file mode 100644 index 000000000..9a809197a --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/block_group_64.go @@ -0,0 +1,93 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +// BlockGroup64Bit emulates struct ext4_group_desc in fs/ext4/ext4.h. +// It is the block group descriptor struct for 64-bit ext4 filesystems. +// It implements BlockGroup interface. It is an extension of the 32-bit +// version of BlockGroup. +type BlockGroup64Bit struct { + // We embed the 32-bit struct here because 64-bit version is just an extension + // of the 32-bit version. + BlockGroup32Bit + + // 64-bit specific fields. + BlockBitmapHi uint32 + InodeBitmapHi uint32 + InodeTableHi uint32 + FreeBlocksCountHi uint16 + FreeInodesCountHi uint16 + UsedDirsCountHi uint16 + ItableUnusedHi uint16 + ExcludeBitmapHi uint32 + BlockBitmapChecksumHi uint16 + InodeBitmapChecksumHi uint16 + _ uint32 // Padding to 64 bytes. +} + +// Compiles only if BlockGroup64Bit implements BlockGroup. +var _ BlockGroup = (*BlockGroup64Bit)(nil) + +// Methods to override. Checksum() and Flags() are not overridden. + +// InodeTable implements BlockGroup.InodeTable. +func (bg *BlockGroup64Bit) InodeTable() uint64 { + return (uint64(bg.InodeTableHi) << 32) | uint64(bg.InodeTableLo) +} + +// BlockBitmap implements BlockGroup.BlockBitmap. +func (bg *BlockGroup64Bit) BlockBitmap() uint64 { + return (uint64(bg.BlockBitmapHi) << 32) | uint64(bg.BlockBitmapLo) +} + +// InodeBitmap implements BlockGroup.InodeBitmap. +func (bg *BlockGroup64Bit) InodeBitmap() uint64 { + return (uint64(bg.InodeBitmapHi) << 32) | uint64(bg.InodeBitmapLo) +} + +// ExclusionBitmap implements BlockGroup.ExclusionBitmap. +func (bg *BlockGroup64Bit) ExclusionBitmap() uint64 { + return (uint64(bg.ExcludeBitmapHi) << 32) | uint64(bg.ExcludeBitmapLo) +} + +// FreeBlocksCount implements BlockGroup.FreeBlocksCount. +func (bg *BlockGroup64Bit) FreeBlocksCount() uint32 { + return (uint32(bg.FreeBlocksCountHi) << 16) | uint32(bg.FreeBlocksCountLo) +} + +// FreeInodesCount implements BlockGroup.FreeInodesCount. +func (bg *BlockGroup64Bit) FreeInodesCount() uint32 { + return (uint32(bg.FreeInodesCountHi) << 16) | uint32(bg.FreeInodesCountLo) +} + +// DirectoryCount implements BlockGroup.DirectoryCount. +func (bg *BlockGroup64Bit) DirectoryCount() uint32 { + return (uint32(bg.UsedDirsCountHi) << 16) | uint32(bg.UsedDirsCountLo) +} + +// UnusedInodeCount implements BlockGroup.UnusedInodeCount. +func (bg *BlockGroup64Bit) UnusedInodeCount() uint32 { + return (uint32(bg.ItableUnusedHi) << 16) | uint32(bg.ItableUnusedLo) +} + +// BlockBitmapChecksum implements BlockGroup.BlockBitmapChecksum. +func (bg *BlockGroup64Bit) BlockBitmapChecksum() uint32 { + return (uint32(bg.BlockBitmapChecksumHi) << 16) | uint32(bg.BlockBitmapChecksumLo) +} + +// InodeBitmapChecksum implements BlockGroup.InodeBitmapChecksum. +func (bg *BlockGroup64Bit) InodeBitmapChecksum() uint32 { + return (uint32(bg.InodeBitmapChecksumHi) << 16) | uint32(bg.InodeBitmapChecksumLo) +} diff --git a/pkg/sentry/fs/ext/disklayout/block_group_test.go b/pkg/sentry/fs/ext/disklayout/block_group_test.go new file mode 100644 index 000000000..0ef4294c0 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/block_group_test.go @@ -0,0 +1,26 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import ( + "testing" +) + +// TestBlockGroupSize tests that the block group descriptor structs are of the +// correct size. +func TestBlockGroupSize(t *testing.T) { + assertSize(t, BlockGroup32Bit{}, 32) + assertSize(t, BlockGroup64Bit{}, 64) +} diff --git a/pkg/sentry/fs/ext/disklayout/dirent.go b/pkg/sentry/fs/ext/disklayout/dirent.go new file mode 100644 index 000000000..685bf57b8 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/dirent.go @@ -0,0 +1,69 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import ( + "gvisor.dev/gvisor/pkg/sentry/fs" +) + +const ( + // MaxFileName is the maximum length of an ext fs file's name. + MaxFileName = 255 +) + +var ( + // inodeTypeByFileType maps ext4 file types to vfs inode types. + // + // See https://www.kernel.org/doc/html/latest/filesystems/ext4/dynamic.html#ftype. + inodeTypeByFileType = map[uint8]fs.InodeType{ + 0: fs.Anonymous, + 1: fs.RegularFile, + 2: fs.Directory, + 3: fs.CharacterDevice, + 4: fs.BlockDevice, + 5: fs.Pipe, + 6: fs.Socket, + 7: fs.Symlink, + } +) + +// The Dirent interface should be implemented by structs representing ext +// directory entries. These are for the linear classical directories which +// just store a list of dirent structs. A directory is a series of data blocks +// where is each data block contains a linear array of dirents. The last entry +// of the block has a record size that takes it to the end of the block. The +// end of the directory is when you read dirInode.Size() bytes from the blocks. +// +// See https://www.kernel.org/doc/html/latest/filesystems/ext4/dynamic.html#linear-classic-directories. +type Dirent interface { + // Inode returns the absolute inode number of the underlying inode. + // Inode number 0 signifies an unused dirent. + Inode() uint32 + + // RecordSize returns the record length of this dirent on disk. The next + // dirent in the dirent list should be read after these many bytes from + // the current dirent. Must be a multiple of 4. + RecordSize() uint16 + + // FileName returns the name of the file. Can be at most 255 is length. + FileName() string + + // FileType returns the inode type of the underlying inode. This is a + // performance hack so that we do not have to read the underlying inode struct + // to know the type of inode. This will only work when the SbDirentFileType + // feature is set. If not, the second returned value will be false indicating + // that user code has to use the inode mode to extract the file type. + FileType() (fs.InodeType, bool) +} diff --git a/pkg/sentry/fs/ext/disklayout/dirent_new.go b/pkg/sentry/fs/ext/disklayout/dirent_new.go new file mode 100644 index 000000000..29ae4a5c2 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/dirent_new.go @@ -0,0 +1,61 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import ( + "fmt" + + "gvisor.dev/gvisor/pkg/sentry/fs" +) + +// DirentNew represents the ext4 directory entry struct. This emulates Linux's +// ext4_dir_entry_2 struct. The FileName can not be more than 255 bytes so we +// only need 8 bits to store the NameLength. As a result, NameLength has been +// shortened and the other 8 bits are used to encode the file type. Use the +// FileTypeRaw field only if the SbDirentFileType feature is set. +// +// Note: This struct can be of variable size on disk. The one described below +// is of maximum size and the FileName beyond NameLength bytes might contain +// garbage. +type DirentNew struct { + InodeNumber uint32 + RecordLength uint16 + NameLength uint8 + FileTypeRaw uint8 + FileNameRaw [MaxFileName]byte +} + +// Compiles only if DirentNew implements Dirent. +var _ Dirent = (*DirentNew)(nil) + +// Inode implements Dirent.Inode. +func (d *DirentNew) Inode() uint32 { return d.InodeNumber } + +// RecordSize implements Dirent.RecordSize. +func (d *DirentNew) RecordSize() uint16 { return d.RecordLength } + +// FileName implements Dirent.FileName. +func (d *DirentNew) FileName() string { + return string(d.FileNameRaw[:d.NameLength]) +} + +// FileType implements Dirent.FileType. +func (d *DirentNew) FileType() (fs.InodeType, bool) { + if inodeType, ok := inodeTypeByFileType[d.FileTypeRaw]; ok { + return inodeType, true + } + + panic(fmt.Sprintf("unknown file type %v", d.FileTypeRaw)) +} diff --git a/pkg/sentry/fs/ext/disklayout/dirent_old.go b/pkg/sentry/fs/ext/disklayout/dirent_old.go new file mode 100644 index 000000000..2e0f9c812 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/dirent_old.go @@ -0,0 +1,50 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import "gvisor.dev/gvisor/pkg/sentry/fs" + +// DirentOld represents the old directory entry struct which does not contain +// the file type. This emulates Linux's ext4_dir_entry struct. This is used in +// ext2, ext3 and sometimes in ext4. +// +// Note: This struct can be of variable size on disk. The one described below +// is of maximum size and the FileName beyond NameLength bytes might contain +// garbage. +type DirentOld struct { + InodeNumber uint32 + RecordLength uint16 + NameLength uint16 + FileNameRaw [MaxFileName]byte +} + +// Compiles only if DirentOld implements Dirent. +var _ Dirent = (*DirentOld)(nil) + +// Inode implements Dirent.Inode. +func (d *DirentOld) Inode() uint32 { return d.InodeNumber } + +// RecordSize implements Dirent.RecordSize. +func (d *DirentOld) RecordSize() uint16 { return d.RecordLength } + +// FileName implements Dirent.FileName. +func (d *DirentOld) FileName() string { + return string(d.FileNameRaw[:d.NameLength]) +} + +// FileType implements Dirent.FileType. +func (d *DirentOld) FileType() (fs.InodeType, bool) { + return fs.Anonymous, false +} diff --git a/pkg/sentry/kernel/kdefs/kdefs.go b/pkg/sentry/fs/ext/disklayout/dirent_test.go index 304da2032..cc6dff2c9 100644 --- a/pkg/sentry/kernel/kdefs/kdefs.go +++ b/pkg/sentry/fs/ext/disklayout/dirent_test.go @@ -1,4 +1,4 @@ -// Copyright 2018 The gVisor Authors. +// Copyright 2019 The gVisor Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. @@ -12,9 +12,17 @@ // See the License for the specific language governing permissions and // limitations under the License. -// Package kdefs defines common kernel definitions. -// -package kdefs +package disklayout + +import ( + "testing" +) + +// TestDirentSize tests that the dirent structs are of the correct +// size. +func TestDirentSize(t *testing.T) { + want := uintptr(263) -// FD is a File Descriptor. -type FD int32 + assertSize(t, DirentOld{}, want) + assertSize(t, DirentNew{}, want) +} diff --git a/pkg/sentry/fs/ext/disklayout/disklayout.go b/pkg/sentry/fs/ext/disklayout/disklayout.go new file mode 100644 index 000000000..bdf4e2132 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/disklayout.go @@ -0,0 +1,50 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package disklayout provides Linux ext file system's disk level structures +// which can be directly read into from the underlying device. Structs aim to +// emulate structures `exactly` how they are layed out on disk. +// +// This library aims to be compatible with all ext(2/3/4) systems so it +// provides a generic interface for all major structures and various +// implementations (for different versions). The user code is responsible for +// using appropriate implementations based on the underlying device. +// +// Interfacing all major structures here serves a few purposes: +// - Abstracts away the complexity of the underlying structure from client +// code. The client only has to figure out versioning on set up and then +// can use these as black boxes and pass it higher up the stack. +// - Having pointer receivers forces the user to use pointers to these +// heavy structs. Hence, prevents the client code from unintentionally +// copying these by value while passing the interface around. +// - Version-based implementation selection is resolved on set up hence +// avoiding per call overhead of choosing implementation. +// - All interface methods are pretty light weight (do not take in any +// parameters by design). Passing pointer arguments to interface methods +// can lead to heap allocation as the compiler won't be able to perform +// escape analysis on an unknown implementation at compile time. +// +// Notes: +// - All fields in these structs are exported because binary.Read would +// panic otherwise. +// - All structures on disk are in little-endian order. Only jbd2 (journal) +// structures are in big-endian order. +// - All OS dependent fields in these structures will be interpretted using +// the Linux version of that field. +// - The suffix `Lo` in field names stands for lower bits of that field. +// - The suffix `Hi` in field names stands for upper bits of that field. +// - The suffix `Raw` has been added to indicate that the field is not split +// into Lo and Hi fields and also to resolve name collision with the +// respective interface. +package disklayout diff --git a/pkg/sentry/fs/ext/disklayout/inode.go b/pkg/sentry/fs/ext/disklayout/inode.go new file mode 100644 index 000000000..b48001910 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/inode.go @@ -0,0 +1,267 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import ( + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/kernel/time" +) + +// The Inode interface must be implemented by structs representing ext inodes. +// The inode stores all the metadata pertaining to the file (except for the +// file name which is held by the directory entry). It does NOT expose all +// fields and should be extended if need be. +// +// Some file systems (e.g. FAT) use the directory entry to store all this +// information. Ext file systems do not so that they can support hard links. +// However, ext4 cheats a little bit and duplicates the file type in the +// directory entry for performance gains. +// +// See https://www.kernel.org/doc/html/latest/filesystems/ext4/dynamic.html#index-nodes. +type Inode interface { + // Mode returns the linux file mode which is majorly used to extract + // information like: + // - File permissions (read/write/execute by user/group/others). + // - Sticky, set UID and GID bits. + // - File type. + // + // Masks to extract this information are provided in pkg/abi/linux/file.go. + Mode() linux.FileMode + + // UID returns the owner UID. + UID() auth.KUID + + // GID returns the owner GID. + GID() auth.KGID + + // Size returns the size of the file in bytes. + Size() uint64 + + // InodeSize returns the size of this inode struct in bytes. + // In ext2 and ext3, the inode struct and inode disk record size was fixed at + // 128 bytes. Ext4 makes it possible for the inode struct to be bigger. + // However, accessing any field beyond the 128 bytes marker must be verified + // using this method. + InodeSize() uint16 + + // AccessTime returns the last access time. Shows when the file was last read. + // + // If InExtendedAttr is set, then this should NOT be used because the + // underlying field is used to store the extended attribute value checksum. + AccessTime() time.Time + + // ChangeTime returns the last change time. Shows when the file meta data + // (like permissions) was last changed. + // + // If InExtendedAttr is set, then this should NOT be used because the + // underlying field is used to store the lower 32 bits of the attribute + // value’s reference count. + ChangeTime() time.Time + + // ModificationTime returns the last modification time. Shows when the file + // content was last modified. + // + // If InExtendedAttr is set, then this should NOT be used because + // the underlying field contains the number of the inode that owns the + // extended attribute. + ModificationTime() time.Time + + // DeletionTime returns the deletion time. Inodes are marked as deleted by + // writing to the underlying field. FS tools can restore files until they are + // actually overwritten. + DeletionTime() time.Time + + // LinksCount returns the number of hard links to this inode. + // + // Normally there is an upper limit on the number of hard links: + // - ext2/ext3 = 32,000 + // - ext4 = 65,000 + // + // This implies that an ext4 directory cannot have more than 64,998 + // subdirectories because each subdirectory will have a hard link to the + // directory via the `..` entry. The directory has hard link via the `.` entry + // of its own. And finally the inode is initiated with 1 hard link (itself). + // + // The underlying value is reset to 1 if all the following hold: + // - Inode is a directory. + // - SbDirNlink is enabled. + // - Number of hard links is incremented past 64,999. + // Hard link value of 1 for a directory would indicate that the number of hard + // links is unknown because a directory can have minimum 2 hard links (itself + // and `.` entry). + LinksCount() uint16 + + // Flags returns InodeFlags which represents the inode flags. + Flags() InodeFlags + + // Blocks returns the underlying inode.i_block array. This field is special + // and is used to store various kinds of things depending on the filesystem + // version and inode type. + // - In ext2/ext3, it contains the block map. + // - In ext4, it contains the extent tree. + // - For inline files, it contains the file contents. + // - For symlinks, it contains the link path (if it fits here). + // + // See https://www.kernel.org/doc/html/latest/filesystems/ext4/dynamic.html#the-contents-of-inode-i-block. + Blocks() [60]byte +} + +// Inode flags. This is not comprehensive and flags which were not used in +// the Linux kernel have been excluded. +const ( + // InSync indicates that all writes to the file must be synchronous. + InSync = 0x8 + + // InImmutable indicates that this file is immutable. + InImmutable = 0x10 + + // InAppend indicates that this file can only be appended to. + InAppend = 0x20 + + // InNoDump indicates that teh dump(1) utility should not dump this file. + InNoDump = 0x40 + + // InNoAccessTime indicates that the access time of this inode must not be + // updated. + InNoAccessTime = 0x80 + + // InIndex indicates that this directory has hashed indexes. + InIndex = 0x1000 + + // InJournalData indicates that file data must always be written through a + // journal device. + InJournalData = 0x4000 + + // InDirSync indicates that all the directory entiry data must be written + // synchronously. + InDirSync = 0x10000 + + // InTopDir indicates that this inode is at the top of the directory hierarchy. + InTopDir = 0x20000 + + // InHugeFile indicates that this is a huge file. + InHugeFile = 0x40000 + + // InExtents indicates that this inode uses extents. + InExtents = 0x80000 + + // InExtendedAttr indicates that this inode stores a large extended attribute + // value in its data blocks. + InExtendedAttr = 0x200000 + + // InInline indicates that this inode has inline data. + InInline = 0x10000000 + + // InReserved indicates that this inode is reserved for the ext4 library. + InReserved = 0x80000000 +) + +// InodeFlags represents all possible combinations of inode flags. It aims to +// cover the bit masks and provide a more user-friendly interface. +type InodeFlags struct { + Sync bool + Immutable bool + Append bool + NoDump bool + NoAccessTime bool + Index bool + JournalData bool + DirSync bool + TopDir bool + HugeFile bool + Extents bool + ExtendedAttr bool + Inline bool + Reserved bool +} + +// ToInt converts inode flags back to its 32-bit rep. +func (f InodeFlags) ToInt() uint32 { + var res uint32 + + if f.Sync { + res |= InSync + } + if f.Immutable { + res |= InImmutable + } + if f.Append { + res |= InAppend + } + if f.NoDump { + res |= InNoDump + } + if f.NoAccessTime { + res |= InNoAccessTime + } + if f.Index { + res |= InIndex + } + if f.JournalData { + res |= InJournalData + } + if f.DirSync { + res |= InDirSync + } + if f.TopDir { + res |= InTopDir + } + if f.HugeFile { + res |= InHugeFile + } + if f.Extents { + res |= InExtents + } + if f.ExtendedAttr { + res |= InExtendedAttr + } + if f.Inline { + res |= InInline + } + if f.Reserved { + res |= InReserved + } + + return res +} + +// InodeFlagsFromInt converts the integer representation of inode flags to +// a InodeFlags struct. +func InodeFlagsFromInt(f uint32) InodeFlags { + return InodeFlags{ + Sync: f&InSync > 0, + Immutable: f&InImmutable > 0, + Append: f&InAppend > 0, + NoDump: f&InNoDump > 0, + NoAccessTime: f&InNoAccessTime > 0, + Index: f&InIndex > 0, + JournalData: f&InJournalData > 0, + DirSync: f&InDirSync > 0, + TopDir: f&InTopDir > 0, + HugeFile: f&InHugeFile > 0, + Extents: f&InExtents > 0, + ExtendedAttr: f&InExtendedAttr > 0, + Inline: f&InInline > 0, + Reserved: f&InReserved > 0, + } +} + +// These masks define how users can view/modify inode flags. The rest of the +// flags are for internal kernel usage only. +const ( + InUserReadFlagMask = 0x4BDFFF + InUserWriteFlagMask = 0x4B80FF +) diff --git a/pkg/sentry/fs/ext/disklayout/inode_new.go b/pkg/sentry/fs/ext/disklayout/inode_new.go new file mode 100644 index 000000000..4f5348372 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/inode_new.go @@ -0,0 +1,96 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import "gvisor.dev/gvisor/pkg/sentry/kernel/time" + +// InodeNew represents ext4 inode structure which can be bigger than +// OldInodeSize. The actual size of this struct should be determined using +// inode.ExtraInodeSize. Accessing any field here should be verified with the +// actual size. The extra space between the end of the inode struct and end of +// the inode record can be used to store extended attr. +// +// If the TimeExtra fields are in scope, the lower 2 bits of those are used +// to extend their counter part to be 34 bits wide; the rest (upper) 30 bits +// are used to provide nanoscond precision. Hence, these timestamps will now +// overflow in May 2446. +// See https://www.kernel.org/doc/html/latest/filesystems/ext4/dynamic.html#inode-timestamps. +type InodeNew struct { + InodeOld + + ExtraInodeSize uint16 + ChecksumHi uint16 + ChangeTimeExtra uint32 + ModificationTimeExtra uint32 + AccessTimeExtra uint32 + CreationTime uint32 + CreationTimeExtra uint32 + VersionHi uint32 + ProjectID uint32 +} + +// Compiles only if InodeNew implements Inode. +var _ Inode = (*InodeNew)(nil) + +// fromExtraTime decodes the extra time and constructs the kernel time struct +// with nanosecond precision. +func fromExtraTime(lo int32, extra uint32) time.Time { + // See description above InodeNew for format. + seconds := (int64(extra&0x3) << 32) + int64(lo) + nanoseconds := int64(extra >> 2) + return time.FromUnix(seconds, nanoseconds) +} + +// Only override methods which change due to ext4 specific fields. + +// Size implements Inode.Size. +func (in *InodeNew) Size() uint64 { + return (uint64(in.SizeHi) << 32) | uint64(in.SizeLo) +} + +// InodeSize implements Inode.InodeSize. +func (in *InodeNew) InodeSize() uint16 { + return oldInodeSize + in.ExtraInodeSize +} + +// ChangeTime implements Inode.ChangeTime. +func (in *InodeNew) ChangeTime() time.Time { + // Apply new timestamp logic if inode.ChangeTimeExtra is in scope. + if in.ExtraInodeSize >= 8 { + return fromExtraTime(in.ChangeTimeRaw, in.ChangeTimeExtra) + } + + return in.InodeOld.ChangeTime() +} + +// ModificationTime implements Inode.ModificationTime. +func (in *InodeNew) ModificationTime() time.Time { + // Apply new timestamp logic if inode.ModificationTimeExtra is in scope. + if in.ExtraInodeSize >= 12 { + return fromExtraTime(in.ModificationTimeRaw, in.ModificationTimeExtra) + } + + return in.InodeOld.ModificationTime() +} + +// AccessTime implements Inode.AccessTime. +func (in *InodeNew) AccessTime() time.Time { + // Apply new timestamp logic if inode.AccessTimeExtra is in scope. + if in.ExtraInodeSize >= 16 { + return fromExtraTime(in.AccessTimeRaw, in.AccessTimeExtra) + } + + return in.InodeOld.AccessTime() +} diff --git a/pkg/sentry/fs/ext/disklayout/inode_old.go b/pkg/sentry/fs/ext/disklayout/inode_old.go new file mode 100644 index 000000000..dc4c9d8e4 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/inode_old.go @@ -0,0 +1,117 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import ( + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/kernel/time" +) + +const ( + // oldInodeSize is the inode size in ext2/ext3. + oldInodeSize = 128 +) + +// InodeOld implements Inode interface. It emulates ext2/ext3 inode struct. +// Inode struct size and record size are both 128 bytes for this. +// +// All fields representing time are in seconds since the epoch. Which means that +// they will overflow in January 2038. +type InodeOld struct { + ModeRaw uint16 + UIDLo uint16 + SizeLo uint32 + + // The time fields are signed integers because they could be negative to + // represent time before the epoch. + AccessTimeRaw int32 + ChangeTimeRaw int32 + ModificationTimeRaw int32 + DeletionTimeRaw int32 + + GIDLo uint16 + LinksCountRaw uint16 + BlocksCountLo uint32 + FlagsRaw uint32 + VersionLo uint32 // This is OS dependent. + BlocksRaw [60]byte + Generation uint32 + FileACLLo uint32 + SizeHi uint32 + ObsoFaddr uint32 + + // OS dependent fields have been inlined here. + BlocksCountHi uint16 + FileACLHi uint16 + UIDHi uint16 + GIDHi uint16 + ChecksumLo uint16 + _ uint16 +} + +// Compiles only if InodeOld implements Inode. +var _ Inode = (*InodeOld)(nil) + +// Mode implements Inode.Mode. +func (in *InodeOld) Mode() linux.FileMode { return linux.FileMode(in.ModeRaw) } + +// UID implements Inode.UID. +func (in *InodeOld) UID() auth.KUID { + return auth.KUID((uint32(in.UIDHi) << 16) | uint32(in.UIDLo)) +} + +// GID implements Inode.GID. +func (in *InodeOld) GID() auth.KGID { + return auth.KGID((uint32(in.GIDHi) << 16) | uint32(in.GIDLo)) +} + +// Size implements Inode.Size. +func (in *InodeOld) Size() uint64 { + // In ext2/ext3, in.SizeHi did not exist, it was instead named in.DirACL. + return uint64(in.SizeLo) +} + +// InodeSize implements Inode.InodeSize. +func (in *InodeOld) InodeSize() uint16 { return oldInodeSize } + +// AccessTime implements Inode.AccessTime. +func (in *InodeOld) AccessTime() time.Time { + return time.FromUnix(int64(in.AccessTimeRaw), 0) +} + +// ChangeTime implements Inode.ChangeTime. +func (in *InodeOld) ChangeTime() time.Time { + return time.FromUnix(int64(in.ChangeTimeRaw), 0) +} + +// ModificationTime implements Inode.ModificationTime. +func (in *InodeOld) ModificationTime() time.Time { + return time.FromUnix(int64(in.ModificationTimeRaw), 0) +} + +// DeletionTime implements Inode.DeletionTime. +func (in *InodeOld) DeletionTime() time.Time { + return time.FromUnix(int64(in.DeletionTimeRaw), 0) +} + +// LinksCount implements Inode.LinksCount. +func (in *InodeOld) LinksCount() uint16 { return in.LinksCountRaw } + +// Flags implements Inode.Flags. +func (in *InodeOld) Flags() InodeFlags { return InodeFlagsFromInt(in.FlagsRaw) } + +// Blocks implements Inode.Blocks. +func (in *InodeOld) Blocks() [60]byte { return in.BlocksRaw } diff --git a/pkg/sentry/fs/ext/disklayout/inode_test.go b/pkg/sentry/fs/ext/disklayout/inode_test.go new file mode 100644 index 000000000..9cae9e4f0 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/inode_test.go @@ -0,0 +1,222 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import ( + "fmt" + "strconv" + "testing" + + "gvisor.dev/gvisor/pkg/sentry/kernel/time" +) + +// TestInodeSize tests that the inode structs are of the correct size. +func TestInodeSize(t *testing.T) { + assertSize(t, InodeOld{}, oldInodeSize) + + // This was updated from 156 bytes to 160 bytes in Oct 2015. + assertSize(t, InodeNew{}, 160) +} + +// TestTimestampSeconds tests that the seconds part of [a/c/m] timestamps in +// ext4 inode structs are decoded correctly. +// +// These tests are derived from the table under https://www.kernel.org/doc/html/latest/filesystems/ext4/dynamic.html#inode-timestamps. +func TestTimestampSeconds(t *testing.T) { + type timestampTest struct { + // msbSet tells if the most significant bit of InodeOld.[X]TimeRaw is set. + // If this is set then the 32-bit time is negative. + msbSet bool + + // lowerBound tells if we should take the lowest possible value of + // InodeOld.[X]TimeRaw while satisfying test.msbSet condition. If set to + // false it tells to take the highest possible value. + lowerBound bool + + // extraBits is InodeNew.[X]TimeExtra. + extraBits uint32 + + // want is the kernel time struct that is expected. + want time.Time + } + + tests := []timestampTest{ + // 1901-12-13 + { + msbSet: true, + lowerBound: true, + extraBits: 0, + want: time.FromUnix(int64(-0x80000000), 0), + }, + + // 1969-12-31 + { + msbSet: true, + lowerBound: false, + extraBits: 0, + want: time.FromUnix(int64(-1), 0), + }, + + // 1970-01-01 + { + msbSet: false, + lowerBound: true, + extraBits: 0, + want: time.FromUnix(int64(0), 0), + }, + + // 2038-01-19 + { + msbSet: false, + lowerBound: false, + extraBits: 0, + want: time.FromUnix(int64(0x7fffffff), 0), + }, + + // 2038-01-19 + { + msbSet: true, + lowerBound: true, + extraBits: 1, + want: time.FromUnix(int64(0x80000000), 0), + }, + + // 2106-02-07 + { + msbSet: true, + lowerBound: false, + extraBits: 1, + want: time.FromUnix(int64(0xffffffff), 0), + }, + + // 2106-02-07 + { + msbSet: false, + lowerBound: true, + extraBits: 1, + want: time.FromUnix(int64(0x100000000), 0), + }, + + // 2174-02-25 + { + msbSet: false, + lowerBound: false, + extraBits: 1, + want: time.FromUnix(int64(0x17fffffff), 0), + }, + + // 2174-02-25 + { + msbSet: true, + lowerBound: true, + extraBits: 2, + want: time.FromUnix(int64(0x180000000), 0), + }, + + // 2242-03-16 + { + msbSet: true, + lowerBound: false, + extraBits: 2, + want: time.FromUnix(int64(0x1ffffffff), 0), + }, + + // 2242-03-16 + { + msbSet: false, + lowerBound: true, + extraBits: 2, + want: time.FromUnix(int64(0x200000000), 0), + }, + + // 2310-04-04 + { + msbSet: false, + lowerBound: false, + extraBits: 2, + want: time.FromUnix(int64(0x27fffffff), 0), + }, + + // 2310-04-04 + { + msbSet: true, + lowerBound: true, + extraBits: 3, + want: time.FromUnix(int64(0x280000000), 0), + }, + + // 2378-04-22 + { + msbSet: true, + lowerBound: false, + extraBits: 3, + want: time.FromUnix(int64(0x2ffffffff), 0), + }, + + // 2378-04-22 + { + msbSet: false, + lowerBound: true, + extraBits: 3, + want: time.FromUnix(int64(0x300000000), 0), + }, + + // 2446-05-10 + { + msbSet: false, + lowerBound: false, + extraBits: 3, + want: time.FromUnix(int64(0x37fffffff), 0), + }, + } + + lowerMSB0 := int32(0) // binary: 00000000 00000000 00000000 00000000 + upperMSB0 := int32(0x7fffffff) // binary: 01111111 11111111 11111111 11111111 + lowerMSB1 := int32(-0x80000000) // binary: 10000000 00000000 00000000 00000000 + upperMSB1 := int32(-1) // binary: 11111111 11111111 11111111 11111111 + + get32BitTime := func(test timestampTest) int32 { + if test.msbSet { + if test.lowerBound { + return lowerMSB1 + } + + return upperMSB1 + } + + if test.lowerBound { + return lowerMSB0 + } + + return upperMSB0 + } + + getTestName := func(test timestampTest) string { + return fmt.Sprintf( + "Tests time decoding with epoch bits 0b%s and 32-bit raw time: MSB set=%t, lower bound=%t", + strconv.FormatInt(int64(test.extraBits), 2), + test.msbSet, + test.lowerBound, + ) + } + + for _, test := range tests { + t.Run(getTestName(test), func(t *testing.T) { + if got := fromExtraTime(get32BitTime(test), test.extraBits); got != test.want { + t.Errorf("Expected: %v, Got: %v", test.want, got) + } + }) + } +} diff --git a/pkg/sentry/fs/ext/disklayout/superblock.go b/pkg/sentry/fs/ext/disklayout/superblock.go new file mode 100644 index 000000000..e4b8f46fb --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/superblock.go @@ -0,0 +1,468 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +// SuperBlock should be implemented by structs representing the ext superblock. +// The superblock holds a lot of information about the enclosing filesystem. +// This interface aims to provide access methods to important information held +// by the superblock. It does NOT expose all fields of the superblock, only the +// ones necessary. This can be expanded when need be. +// +// Location and replication: +// - The superblock is located at offset 1024 in block group 0. +// - Redundant copies of the superblock and group descriptors are kept in +// all groups if SbSparse feature flag is NOT set. If it is set, the +// replicas only exist in groups whose group number is either 0 or a +// power of 3, 5, or 7. +// - There is also a sparse superblock feature v2 in which there are just +// two replicas saved in the block groups pointed by sb.s_backup_bgs. +// +// Replicas should eventually be updated if the superblock is updated. +// +// See https://www.kernel.org/doc/html/latest/filesystems/ext4/globals.html#super-block. +type SuperBlock interface { + // InodesCount returns the total number of inodes in this filesystem. + InodesCount() uint32 + + // BlocksCount returns the total number of data blocks in this filesystem. + BlocksCount() uint64 + + // FreeBlocksCount returns the number of free blocks in this filesystem. + FreeBlocksCount() uint64 + + // FreeInodesCount returns the number of free inodes in this filesystem. + FreeInodesCount() uint32 + + // MountCount returns the number of mounts since the last fsck. + MountCount() uint16 + + // MaxMountCount returns the number of mounts allowed beyond which a fsck is + // needed. + MaxMountCount() uint16 + + // FirstDataBlock returns the absolute block number of the first data block, + // which contains the super block itself. + // + // If the filesystem has 1kb data blocks then this should return 1. For all + // other configurations, this typically returns 0. + // + // The first block group descriptor is in (FirstDataBlock() + 1)th block. + FirstDataBlock() uint32 + + // BlockSize returns the size of one data block in this filesystem. + // This can be calculated by 2^(10 + sb.s_log_block_size). This ensures that + // the smallest block size is 1kb. + BlockSize() uint64 + + // BlocksPerGroup returns the number of data blocks in a block group. + BlocksPerGroup() uint32 + + // ClusterSize returns block cluster size (set during mkfs time by admin). + // This can be calculated by 2^(10 + sb.s_log_cluster_size). This ensures that + // the smallest cluster size is 1kb. + // + // sb.s_log_cluster_size must equal sb.s_log_block_size if bigalloc feature + // is NOT set and consequently BlockSize() = ClusterSize() in that case. + ClusterSize() uint64 + + // ClustersPerGroup returns: + // - number of clusters per group if bigalloc is enabled. + // - BlocksPerGroup() otherwise. + ClustersPerGroup() uint32 + + // InodeSize returns the size of the inode disk record size in bytes. Use this + // to iterate over inode arrays on disk. + // + // In ext2 and ext3: + // - Each inode had a disk record of 128 bytes. + // - The inode struct size was fixed at 128 bytes. + // + // In ext4 its possible to allocate larger on-disk inodes: + // - Inode disk record size = sb.s_inode_size (function return value). + // = 256 (default) + // - Inode struct size = 128 + inode.i_extra_isize. + // = 128 + 32 = 160 (default) + InodeSize() uint16 + + // InodesPerGroup returns the number of inodes in a block group. + InodesPerGroup() uint32 + + // BgDescSize returns the size of the block group descriptor struct. + // + // In ext2, ext3, ext4 (without 64-bit feature), the block group descriptor + // is only 32 bytes long. + // In ext4 with 64-bit feature, the block group descriptor expands to AT LEAST + // 64 bytes. It might be bigger than that. + BgDescSize() uint16 + + // CompatibleFeatures returns the CompatFeatures struct which holds all the + // compatible features this fs supports. + CompatibleFeatures() CompatFeatures + + // IncompatibleFeatures returns the CompatFeatures struct which holds all the + // incompatible features this fs supports. + IncompatibleFeatures() IncompatFeatures + + // ReadOnlyCompatibleFeatures returns the CompatFeatures struct which holds all the + // readonly compatible features this fs supports. + ReadOnlyCompatibleFeatures() RoCompatFeatures + + // Magic() returns the magic signature which must be 0xef53. + Magic() uint16 + + // Revision returns the superblock revision. Superblock struct fields from + // offset 0x54 till 0x150 should only be used if superblock has DynamicRev. + Revision() SbRevision +} + +// SbRevision is the type for superblock revisions. +type SbRevision int + +// Super block revisions. +const ( + // OldRev is the good old (original) format. + OldRev SbRevision = 0 + + // DynamicRev is v2 format w/ dynamic inode sizes. + DynamicRev SbRevision = 1 +) + +// Superblock compatible features. +// This is not exhaustive, unused features are not listed. +const ( + // SbDirPrealloc indicates directory preallocation. + SbDirPrealloc = 0x1 + + // SbHasJournal indicates the presence of a journal. jbd2 should only work + // with this being set. + SbHasJournal = 0x4 + + // SbExtAttr indicates extended attributes support. + SbExtAttr = 0x8 + + // SbResizeInode indicates that the fs has reserved GDT blocks (right after + // group descriptors) for fs expansion. + SbResizeInode = 0x10 + + // SbDirIndex indicates that the fs has directory indices. + SbDirIndex = 0x20 + + // SbSparseV2 stands for Sparse superblock version 2. + SbSparseV2 = 0x200 +) + +// CompatFeatures represents a superblock's compatible feature set. If the +// kernel does not understand any of these feature, it can still read/write +// to this fs. +type CompatFeatures struct { + DirPrealloc bool + HasJournal bool + ExtAttr bool + ResizeInode bool + DirIndex bool + SparseV2 bool +} + +// ToInt converts superblock compatible features back to its 32-bit rep. +func (f CompatFeatures) ToInt() uint32 { + var res uint32 + + if f.DirPrealloc { + res |= SbDirPrealloc + } + if f.HasJournal { + res |= SbHasJournal + } + if f.ExtAttr { + res |= SbExtAttr + } + if f.ResizeInode { + res |= SbResizeInode + } + if f.DirIndex { + res |= SbDirIndex + } + if f.SparseV2 { + res |= SbSparseV2 + } + + return res +} + +// CompatFeaturesFromInt converts the integer representation of superblock +// compatible features to CompatFeatures struct. +func CompatFeaturesFromInt(f uint32) CompatFeatures { + return CompatFeatures{ + DirPrealloc: f&SbDirPrealloc > 0, + HasJournal: f&SbHasJournal > 0, + ExtAttr: f&SbExtAttr > 0, + ResizeInode: f&SbResizeInode > 0, + DirIndex: f&SbDirIndex > 0, + SparseV2: f&SbSparseV2 > 0, + } +} + +// Superblock incompatible features. +// This is not exhaustive, unused features are not listed. +const ( + // SbDirentFileType indicates that directory entries record the file type. + // We should use struct ext4_dir_entry_2 for dirents then. + SbDirentFileType = 0x2 + + // SbRecovery indicates that the filesystem needs recovery. + SbRecovery = 0x4 + + // SbJournalDev indicates that the filesystem has a separate journal device. + SbJournalDev = 0x8 + + // SbMetaBG indicates that the filesystem is using Meta block groups. Moves + // the group descriptors from the congested first block group into the first + // group of each metablock group to increase the maximum block groups limit + // and hence support much larger filesystems. + // + // See https://www.kernel.org/doc/html/latest/filesystems/ext4/overview.html#meta-block-groups. + SbMetaBG = 0x10 + + // SbExtents indicates that the filesystem uses extents. Must be set in ext4 + // filesystems. + SbExtents = 0x40 + + // SbIs64Bit indicates that this filesystem addresses blocks with 64-bits. + // Hence can support 2^64 data blocks. + SbIs64Bit = 0x80 + + // SbMMP indicates that this filesystem has multiple mount protection. + // + // See https://www.kernel.org/doc/html/latest/filesystems/ext4/globals.html#multiple-mount-protection. + SbMMP = 0x100 + + // SbFlexBg indicates that this filesystem has flexible block groups. Several + // block groups are tied into one logical block group so that all the metadata + // for the block groups (bitmaps and inode tables) are close together for + // faster loading. Consequently, large files will be continuous on disk. + // However, this does not affect the placement of redundant superblocks and + // group descriptors. + // + // See https://www.kernel.org/doc/html/latest/filesystems/ext4/overview.html#flexible-block-groups. + SbFlexBg = 0x200 + + // SbLargeDir shows that large directory enabled. Directory htree can be 3 + // levels deep. Directory htrees are allowed to be 2 levels deep otherwise. + SbLargeDir = 0x4000 + + // SbInlineData allows inline data in inodes for really small files. + SbInlineData = 0x8000 + + // SbEncrypted indicates that this fs contains encrypted inodes. + SbEncrypted = 0x10000 +) + +// IncompatFeatures represents a superblock's incompatible feature set. If the +// kernel does not understand any of these feature, it should refuse to mount. +type IncompatFeatures struct { + DirentFileType bool + Recovery bool + JournalDev bool + MetaBG bool + Extents bool + Is64Bit bool + MMP bool + FlexBg bool + LargeDir bool + InlineData bool + Encrypted bool +} + +// ToInt converts superblock incompatible features back to its 32-bit rep. +func (f IncompatFeatures) ToInt() uint32 { + var res uint32 + + if f.DirentFileType { + res |= SbDirentFileType + } + if f.Recovery { + res |= SbRecovery + } + if f.JournalDev { + res |= SbJournalDev + } + if f.MetaBG { + res |= SbMetaBG + } + if f.Extents { + res |= SbExtents + } + if f.Is64Bit { + res |= SbIs64Bit + } + if f.MMP { + res |= SbMMP + } + if f.FlexBg { + res |= SbFlexBg + } + if f.LargeDir { + res |= SbLargeDir + } + if f.InlineData { + res |= SbInlineData + } + if f.Encrypted { + res |= SbEncrypted + } + + return res +} + +// IncompatFeaturesFromInt converts the integer representation of superblock +// incompatible features to IncompatFeatures struct. +func IncompatFeaturesFromInt(f uint32) IncompatFeatures { + return IncompatFeatures{ + DirentFileType: f&SbDirentFileType > 0, + Recovery: f&SbRecovery > 0, + JournalDev: f&SbJournalDev > 0, + MetaBG: f&SbMetaBG > 0, + Extents: f&SbExtents > 0, + Is64Bit: f&SbIs64Bit > 0, + MMP: f&SbMMP > 0, + FlexBg: f&SbFlexBg > 0, + LargeDir: f&SbLargeDir > 0, + InlineData: f&SbInlineData > 0, + Encrypted: f&SbEncrypted > 0, + } +} + +// Superblock readonly compatible features. +// This is not exhaustive, unused features are not listed. +const ( + // SbSparse indicates sparse superblocks. Only groups with number either 0 or + // a power of 3, 5, or 7 will have redundant copies of the superblock and + // block descriptors. + SbSparse = 0x1 + + // SbLargeFile indicates that this fs has been used to store a file >= 2GiB. + SbLargeFile = 0x2 + + // SbHugeFile indicates that this fs contains files whose sizes are + // represented in units of logicals blocks, not 512-byte sectors. + SbHugeFile = 0x8 + + // SbGdtCsum indicates that group descriptors have checksums. + SbGdtCsum = 0x10 + + // SbDirNlink indicates that the new subdirectory limit is 64,999. Ext3 has a + // 32,000 subdirectory limit. + SbDirNlink = 0x20 + + // SbExtraIsize indicates that large inodes exist on this filesystem. + SbExtraIsize = 0x40 + + // SbHasSnapshot indicates the existence of a snapshot. + SbHasSnapshot = 0x80 + + // SbQuota enables usage tracking for all quota types. + SbQuota = 0x100 + + // SbBigalloc maps to the bigalloc feature. When set, the minimum allocation + // unit becomes a cluster rather than a data block. Then block bitmaps track + // clusters, not data blocks. + // + // See https://www.kernel.org/doc/html/latest/filesystems/ext4/overview.html#bigalloc. + SbBigalloc = 0x200 + + // SbMetadataCsum indicates that the fs supports metadata checksumming. + SbMetadataCsum = 0x400 + + // SbReadOnly marks this filesystem as readonly. Should refuse to mount in + // read/write mode. + SbReadOnly = 0x1000 +) + +// RoCompatFeatures represents a superblock's readonly compatible feature set. +// If the kernel does not understand any of these feature, it can still mount +// readonly. But if the user wants to mount read/write, the kernel should +// refuse to mount. +type RoCompatFeatures struct { + Sparse bool + LargeFile bool + HugeFile bool + GdtCsum bool + DirNlink bool + ExtraIsize bool + HasSnapshot bool + Quota bool + Bigalloc bool + MetadataCsum bool + ReadOnly bool +} + +// ToInt converts superblock readonly compatible features to its 32-bit rep. +func (f RoCompatFeatures) ToInt() uint32 { + var res uint32 + + if f.Sparse { + res |= SbSparse + } + if f.LargeFile { + res |= SbLargeFile + } + if f.HugeFile { + res |= SbHugeFile + } + if f.GdtCsum { + res |= SbGdtCsum + } + if f.DirNlink { + res |= SbDirNlink + } + if f.ExtraIsize { + res |= SbExtraIsize + } + if f.HasSnapshot { + res |= SbHasSnapshot + } + if f.Quota { + res |= SbQuota + } + if f.Bigalloc { + res |= SbBigalloc + } + if f.MetadataCsum { + res |= SbMetadataCsum + } + if f.ReadOnly { + res |= SbReadOnly + } + + return res +} + +// RoCompatFeaturesFromInt converts the integer representation of superblock +// readonly compatible features to RoCompatFeatures struct. +func RoCompatFeaturesFromInt(f uint32) RoCompatFeatures { + return RoCompatFeatures{ + Sparse: f&SbSparse > 0, + LargeFile: f&SbLargeFile > 0, + HugeFile: f&SbHugeFile > 0, + GdtCsum: f&SbGdtCsum > 0, + DirNlink: f&SbDirNlink > 0, + ExtraIsize: f&SbExtraIsize > 0, + HasSnapshot: f&SbHasSnapshot > 0, + Quota: f&SbQuota > 0, + Bigalloc: f&SbBigalloc > 0, + MetadataCsum: f&SbMetadataCsum > 0, + ReadOnly: f&SbReadOnly > 0, + } +} diff --git a/pkg/sentry/fs/ext/disklayout/superblock_32.go b/pkg/sentry/fs/ext/disklayout/superblock_32.go new file mode 100644 index 000000000..587e4afaa --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/superblock_32.go @@ -0,0 +1,75 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +// SuperBlock32Bit implements SuperBlock and represents the 32-bit version of +// the ext4_super_block struct in fs/ext4/ext4.h. +type SuperBlock32Bit struct { + // We embed the old superblock struct here because the 32-bit version is just + // an extension of the old version. + SuperBlockOld + + FirstInode uint32 + InodeSizeRaw uint16 + BlockGroupNumber uint16 + FeatureCompat uint32 + FeatureIncompat uint32 + FeatureRoCompat uint32 + UUID [16]byte + VolumeName [16]byte + LastMounted [64]byte + AlgoUsageBitmap uint32 + PreallocBlocks uint8 + PreallocDirBlocks uint8 + ReservedGdtBlocks uint16 + JournalUUID [16]byte + JournalInum uint32 + JournalDev uint32 + LastOrphan uint32 + HashSeed [4]uint32 + DefaultHashVersion uint8 + JnlBackupType uint8 + BgDescSizeRaw uint16 + DefaultMountOpts uint32 + FirstMetaBg uint32 + MkfsTime uint32 + JnlBlocks [17]uint32 +} + +// Compiles only if SuperBlock32Bit implements SuperBlock. +var _ SuperBlock = (*SuperBlock32Bit)(nil) + +// Only override methods which change based on the additional fields above. +// Not overriding SuperBlock.BgDescSize because it would still return 32 here. + +// InodeSize implements SuperBlock.InodeSize. +func (sb *SuperBlock32Bit) InodeSize() uint16 { + return sb.InodeSizeRaw +} + +// CompatibleFeatures implements SuperBlock.CompatibleFeatures. +func (sb *SuperBlock32Bit) CompatibleFeatures() CompatFeatures { + return CompatFeaturesFromInt(sb.FeatureCompat) +} + +// IncompatibleFeatures implements SuperBlock.IncompatibleFeatures. +func (sb *SuperBlock32Bit) IncompatibleFeatures() IncompatFeatures { + return IncompatFeaturesFromInt(sb.FeatureIncompat) +} + +// ReadOnlyCompatibleFeatures implements SuperBlock.ReadOnlyCompatibleFeatures. +func (sb *SuperBlock32Bit) ReadOnlyCompatibleFeatures() RoCompatFeatures { + return RoCompatFeaturesFromInt(sb.FeatureRoCompat) +} diff --git a/pkg/sentry/fs/ext/disklayout/superblock_64.go b/pkg/sentry/fs/ext/disklayout/superblock_64.go new file mode 100644 index 000000000..a2c2278fb --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/superblock_64.go @@ -0,0 +1,94 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +// SuperBlock64Bit implements SuperBlock and represents the 64-bit version of +// the ext4_super_block struct in fs/ext4/ext4.h. This sums up to be exactly +// 1024 bytes (smallest possible block size) and hence the superblock always +// fits in no more than one data block. +type SuperBlock64Bit struct { + // We embed the 32-bit struct here because 64-bit version is just an extension + // of the 32-bit version. + SuperBlock32Bit + + BlocksCountHi uint32 + ReservedBlocksCountHi uint32 + FreeBlocksCountHi uint32 + MinInodeSize uint16 + WantInodeSize uint16 + Flags uint32 + RaidStride uint16 + MmpInterval uint16 + MmpBlock uint64 + RaidStripeWidth uint32 + LogGroupsPerFlex uint8 + ChecksumType uint8 + _ uint16 + KbytesWritten uint64 + SnapshotInum uint32 + SnapshotID uint32 + SnapshotRsrvBlocksCount uint64 + SnapshotList uint32 + ErrorCount uint32 + FirstErrorTime uint32 + FirstErrorInode uint32 + FirstErrorBlock uint64 + FirstErrorFunction [32]byte + FirstErrorLine uint32 + LastErrorTime uint32 + LastErrorInode uint32 + LastErrorLine uint32 + LastErrorBlock uint64 + LastErrorFunction [32]byte + MountOpts [64]byte + UserQuotaInum uint32 + GroupQuotaInum uint32 + OverheadBlocks uint32 + BackupBgs [2]uint32 + EncryptAlgos [4]uint8 + EncryptPwSalt [16]uint8 + LostFoundInode uint32 + ProjectQuotaInode uint32 + ChecksumSeed uint32 + WtimeHi uint8 + MtimeHi uint8 + MkfsTimeHi uint8 + LastCheckHi uint8 + FirstErrorTimeHi uint8 + LastErrorTimeHi uint8 + _ [2]uint8 + Encoding uint16 + EncodingFlags uint16 + _ [95]uint32 + Checksum uint32 +} + +// Compiles only if SuperBlock64Bit implements SuperBlock. +var _ SuperBlock = (*SuperBlock64Bit)(nil) + +// Only override methods which change based on the 64-bit feature. + +// BlocksCount implements SuperBlock.BlocksCount. +func (sb *SuperBlock64Bit) BlocksCount() uint64 { + return (uint64(sb.BlocksCountHi) << 32) | uint64(sb.BlocksCountLo) +} + +// FreeBlocksCount implements SuperBlock.FreeBlocksCount. +func (sb *SuperBlock64Bit) FreeBlocksCount() uint64 { + return (uint64(sb.FreeBlocksCountHi) << 32) | uint64(sb.FreeBlocksCountLo) +} + +// BgDescSize implements SuperBlock.BgDescSize. +func (sb *SuperBlock64Bit) BgDescSize() uint16 { return sb.BgDescSizeRaw } diff --git a/pkg/sentry/fs/ext/disklayout/superblock_old.go b/pkg/sentry/fs/ext/disklayout/superblock_old.go new file mode 100644 index 000000000..c74953610 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/superblock_old.go @@ -0,0 +1,102 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +// SuperBlockOld implements SuperBlock and represents the old version of the +// superblock struct in ext2 and ext3 systems. +type SuperBlockOld struct { + InodesCountRaw uint32 + BlocksCountLo uint32 + ReservedBlocksCount uint32 + FreeBlocksCountLo uint32 + FreeInodesCountRaw uint32 + FirstDataBlockRaw uint32 + LogBlockSize uint32 + LogClusterSize uint32 + BlocksPerGroupRaw uint32 + ClustersPerGroupRaw uint32 + InodesPerGroupRaw uint32 + Mtime uint32 + Wtime uint32 + MountCountRaw uint16 + MaxMountCountRaw uint16 + MagicRaw uint16 + State uint16 + Errors uint16 + MinorRevLevel uint16 + LastCheck uint32 + CheckInterval uint32 + CreatorOS uint32 + RevLevel uint32 + DefResUID uint16 + DefResGID uint16 +} + +// InodesCount implements SuperBlock.InodesCount. +func (sb *SuperBlockOld) InodesCount() uint32 { return sb.InodesCountRaw } + +// BlocksCount implements SuperBlock.BlocksCount. +func (sb *SuperBlockOld) BlocksCount() uint64 { return uint64(sb.BlocksCountLo) } + +// FreeBlocksCount implements SuperBlock.FreeBlocksCount. +func (sb *SuperBlockOld) FreeBlocksCount() uint64 { return uint64(sb.FreeBlocksCountLo) } + +// FreeInodesCount implements SuperBlock.FreeInodesCount. +func (sb *SuperBlockOld) FreeInodesCount() uint32 { return sb.FreeInodesCountRaw } + +// MountCount implements SuperBlock.MountCount. +func (sb *SuperBlockOld) MountCount() uint16 { return sb.MountCountRaw } + +// MaxMountCount implements SuperBlock.MaxMountCount. +func (sb *SuperBlockOld) MaxMountCount() uint16 { return sb.MaxMountCountRaw } + +// FirstDataBlock implements SuperBlock.FirstDataBlock. +func (sb *SuperBlockOld) FirstDataBlock() uint32 { return sb.FirstDataBlockRaw } + +// BlockSize implements SuperBlock.BlockSize. +func (sb *SuperBlockOld) BlockSize() uint64 { return 1 << (10 + sb.LogBlockSize) } + +// BlocksPerGroup implements SuperBlock.BlocksPerGroup. +func (sb *SuperBlockOld) BlocksPerGroup() uint32 { return sb.BlocksPerGroupRaw } + +// ClusterSize implements SuperBlock.ClusterSize. +func (sb *SuperBlockOld) ClusterSize() uint64 { return 1 << (10 + sb.LogClusterSize) } + +// ClustersPerGroup implements SuperBlock.ClustersPerGroup. +func (sb *SuperBlockOld) ClustersPerGroup() uint32 { return sb.ClustersPerGroupRaw } + +// InodeSize implements SuperBlock.InodeSize. +func (sb *SuperBlockOld) InodeSize() uint16 { return oldInodeSize } + +// InodesPerGroup implements SuperBlock.InodesPerGroup. +func (sb *SuperBlockOld) InodesPerGroup() uint32 { return sb.InodesPerGroupRaw } + +// BgDescSize implements SuperBlock.BgDescSize. +func (sb *SuperBlockOld) BgDescSize() uint16 { return 32 } + +// CompatibleFeatures implements SuperBlock.CompatibleFeatures. +func (sb *SuperBlockOld) CompatibleFeatures() CompatFeatures { return CompatFeatures{} } + +// IncompatibleFeatures implements SuperBlock.IncompatibleFeatures. +func (sb *SuperBlockOld) IncompatibleFeatures() IncompatFeatures { return IncompatFeatures{} } + +// ReadOnlyCompatibleFeatures implements SuperBlock.ReadOnlyCompatibleFeatures. +func (sb *SuperBlockOld) ReadOnlyCompatibleFeatures() RoCompatFeatures { return RoCompatFeatures{} } + +// Magic implements SuperBlock.Magic. +func (sb *SuperBlockOld) Magic() uint16 { return sb.MagicRaw } + +// Revision implements SuperBlock.Revision. +func (sb *SuperBlockOld) Revision() SbRevision { return SbRevision(sb.RevLevel) } diff --git a/pkg/sentry/fs/ext/disklayout/superblock_test.go b/pkg/sentry/fs/ext/disklayout/superblock_test.go new file mode 100644 index 000000000..463b5ba21 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/superblock_test.go @@ -0,0 +1,27 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import ( + "testing" +) + +// TestSuperBlockSize tests that the superblock structs are of the correct +// size. +func TestSuperBlockSize(t *testing.T) { + assertSize(t, SuperBlockOld{}, 84) + assertSize(t, SuperBlock32Bit{}, 336) + assertSize(t, SuperBlock64Bit{}, 1024) +} diff --git a/pkg/sentry/fs/ext/disklayout/test_utils.go b/pkg/sentry/fs/ext/disklayout/test_utils.go new file mode 100644 index 000000000..9c63f04c0 --- /dev/null +++ b/pkg/sentry/fs/ext/disklayout/test_utils.go @@ -0,0 +1,30 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package disklayout + +import ( + "reflect" + "testing" + + "gvisor.dev/gvisor/pkg/binary" +) + +func assertSize(t *testing.T, v interface{}, want uintptr) { + t.Helper() + + if got := binary.Size(v); got != want { + t.Errorf("struct %s should be exactly %d bytes but is %d bytes", reflect.TypeOf(v).Name(), want, got) + } +} diff --git a/pkg/sentry/fs/ext/ext.go b/pkg/sentry/fs/ext/ext.go new file mode 100644 index 000000000..7602e2bf0 --- /dev/null +++ b/pkg/sentry/fs/ext/ext.go @@ -0,0 +1,49 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package ext implements readonly ext(2/3/4) filesystems. +package ext + +import ( + "io" + "sync" + + "gvisor.dev/gvisor/pkg/sentry/fs/ext/disklayout" +) + +// Filesystem implements vfs.FilesystemImpl. +type Filesystem struct { + // dev is the ReadSeeker for the underlying fs device and is protected by mu. + dev io.ReadSeeker + + // mu synchronizes the usage of dev. The ext filesystems take locality into + // condsideration, i.e. data blocks of a file will tend to be placed close + // together. On a spinning disk, locality reduces the amount of movement of + // the head hence speeding up IO operations. On an SSD there are no moving + // parts but locality increases the size of each transer request. Hence, + // having mutual exclusion on the read seeker while reading a file *should* + // help in achieving the intended performance gains. + // + // Note: This synchronization was not coupled with the ReadSeeker itself + // because we want to synchronize across read/seek operations for the + // performance gains mentioned above. Helps enforcing one-file-at-a-time IO. + mu sync.Mutex + + // sb represents the filesystem superblock. Immutable after initialization. + sb disklayout.SuperBlock + + // bgs represents all the block group descriptors for the filesystem. + // Immutable after initialization. + bgs []disklayout.BlockGroup +} diff --git a/pkg/sentry/fs/ext4/BUILD b/pkg/sentry/fs/ext4/BUILD deleted file mode 100644 index 9df9084c3..000000000 --- a/pkg/sentry/fs/ext4/BUILD +++ /dev/null @@ -1,14 +0,0 @@ -package(licenses = ["notice"]) - -load("//tools/go_stateify:defs.bzl", "go_library") - -go_library( - name = "ext4", - srcs = ["fs.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ext4", - visibility = ["//pkg/sentry:internal"], - deps = [ - "//pkg/sentry/context", - "//pkg/sentry/fs", - ], -) diff --git a/pkg/sentry/fs/ext4/fs.go b/pkg/sentry/fs/ext4/fs.go deleted file mode 100644 index de5f0ef63..000000000 --- a/pkg/sentry/fs/ext4/fs.go +++ /dev/null @@ -1,61 +0,0 @@ -// Copyright 2019 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Package ext4 implements the ext4 filesystem. -package ext4 - -import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" -) - -// filesystem implements fs.Filesystem for ext4. -// -// +stateify savable -type filesystem struct{} - -func init() { - fs.RegisterFilesystem(&filesystem{}) -} - -// FilesystemName is the name under which the filesystem is registered. -// Name matches fs/ext4/super.c:ext4_fs_type.name. -const FilesystemName = "ext4" - -// Name is the name of the file system. -func (*filesystem) Name() string { - return FilesystemName -} - -// AllowUserMount prohibits users from using mount(2) with this file system. -func (*filesystem) AllowUserMount() bool { - return false -} - -// AllowUserList prohibits this filesystem to be listed in /proc/filesystems. -func (*filesystem) AllowUserList() bool { - return false -} - -// Flags returns properties of the filesystem. -// -// In Linux, ext4 returns FS_REQUIRES_DEV. See fs/ext4/super.c -func (*filesystem) Flags() fs.FilesystemFlags { - return fs.FilesystemRequiresDev -} - -// Mount returns the root inode of the ext4 fs. -func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSourceFlags, data string, cgroupsInt interface{}) (*fs.Inode, error) { - panic("unimplemented") -} diff --git a/pkg/sentry/fs/fdpipe/BUILD b/pkg/sentry/fs/fdpipe/BUILD index 098463e97..bf00b9c09 100644 --- a/pkg/sentry/fs/fdpipe/BUILD +++ b/pkg/sentry/fs/fdpipe/BUILD @@ -9,8 +9,8 @@ go_library( "pipe_opener.go", "pipe_state.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fdpipe", - imports = ["gvisor.googlesource.com/gvisor/pkg/sentry/fs"], + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/fdpipe", + imports = ["gvisor.dev/gvisor/pkg/sentry/fs"], visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/fd", diff --git a/pkg/sentry/fs/fdpipe/pipe.go b/pkg/sentry/fs/fdpipe/pipe.go index 4ef7ea08a..5a0a67eab 100644 --- a/pkg/sentry/fs/fdpipe/pipe.go +++ b/pkg/sentry/fs/fdpipe/pipe.go @@ -20,17 +20,17 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/fdnotifier" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/secio" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/secio" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // pipeOperations are the fs.FileOperations of a host pipe. diff --git a/pkg/sentry/fs/fdpipe/pipe_opener.go b/pkg/sentry/fs/fdpipe/pipe_opener.go index 0cabe2e18..64b558975 100644 --- a/pkg/sentry/fs/fdpipe/pipe_opener.go +++ b/pkg/sentry/fs/fdpipe/pipe_opener.go @@ -20,10 +20,10 @@ import ( "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/syserror" ) // NonBlockingOpener is a generic host file opener used to retry opening host diff --git a/pkg/sentry/fs/fdpipe/pipe_opener_test.go b/pkg/sentry/fs/fdpipe/pipe_opener_test.go index 8c8b1b40c..8e4d839e1 100644 --- a/pkg/sentry/fs/fdpipe/pipe_opener_test.go +++ b/pkg/sentry/fs/fdpipe/pipe_opener_test.go @@ -25,12 +25,12 @@ import ( "time" "github.com/google/uuid" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) type hostOpener struct { @@ -359,7 +359,7 @@ func TestCopiedReadAheadBuffer(t *testing.T) { inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{ Type: fs.Pipe, }) - file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, pipeOps) + file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, pipeOps) // Check that the file we opened points to a pipe with a non-empty read ahead buffer. bufsize := len(pipeOps.readAheadBuffer) diff --git a/pkg/sentry/fs/fdpipe/pipe_state.go b/pkg/sentry/fs/fdpipe/pipe_state.go index 8b347aa11..29175fb3d 100644 --- a/pkg/sentry/fs/fdpipe/pipe_state.go +++ b/pkg/sentry/fs/fdpipe/pipe_state.go @@ -19,8 +19,8 @@ import ( "io/ioutil" "sync" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // beforeSave is invoked by stateify. diff --git a/pkg/sentry/fs/fdpipe/pipe_test.go b/pkg/sentry/fs/fdpipe/pipe_test.go index b59a6aa0e..69abc1e71 100644 --- a/pkg/sentry/fs/fdpipe/pipe_test.go +++ b/pkg/sentry/fs/fdpipe/pipe_test.go @@ -21,12 +21,12 @@ import ( "syscall" "testing" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/fdnotifier" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) func singlePipeFD() (int, error) { @@ -50,11 +50,11 @@ func mockPipeDirent(t *testing.T) *fs.Dirent { User: fs.PermMask{Read: true, Write: true}, }, } - inode := fs.NewInode(node, fs.NewMockMountSource(nil), fs.StableAttr{ + inode := fs.NewInode(ctx, node, fs.NewMockMountSource(nil), fs.StableAttr{ Type: fs.Pipe, BlockSize: usermem.PageSize, }) - return fs.NewDirent(inode, "") + return fs.NewDirent(ctx, inode, "") } func TestNewPipe(t *testing.T) { @@ -285,7 +285,7 @@ func TestPipeRequest(t *testing.T) { defer p.Release() inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{Type: fs.Pipe}) - file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, p) + file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, p) // Issue request via the appropriate function. switch c := test.context.(type) { @@ -339,7 +339,7 @@ func TestPipeReadAheadBuffer(t *testing.T) { inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{ Type: fs.Pipe, }) - file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, p) + file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, p) // In total we expect to read data + buffered. total := append(buffered, data...) @@ -358,9 +358,9 @@ func TestPipeReadAheadBuffer(t *testing.T) { } } -// This is very important for pipes in general because they can return EWOULDBLOCK and for -// those that block they must continue until they have read all of the data (and report it -// as such. +// This is very important for pipes in general because they can return +// EWOULDBLOCK and for those that block they must continue until they have read +// all of the data (and report it as such). func TestPipeReadsAccumulate(t *testing.T) { fds := make([]int, 2) if err := syscall.Pipe(fds); err != nil { @@ -385,7 +385,7 @@ func TestPipeReadsAccumulate(t *testing.T) { inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{ Type: fs.Pipe, }) - file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, p) + file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, p) // Write some some bytes to the pipe. data := []byte("some message") @@ -393,8 +393,8 @@ func TestPipeReadsAccumulate(t *testing.T) { t.Fatalf("write to pipe got (%d, %v), want (%d, nil)", n, err, len(data)) } - // Construct a segment vec that is a bit more than we have written so we trigger - // an EWOULDBLOCK. + // Construct a segment vec that is a bit more than we have written so we + // trigger an EWOULDBLOCK. wantBytes := len(data) + 1 readBuffer := make([]byte, wantBytes) iov := usermem.BytesIOSequence(readBuffer) @@ -446,41 +446,57 @@ func TestPipeWritesAccumulate(t *testing.T) { wfile.Close() t.Fatalf("newPipeOperations got error %v, want nil", err) } - // Don't forget to remove the fd from the fd notifier. Otherwise other tests will - // likely be borked, because it's global :( + // Don't forget to remove the fd from the fd notifier. Otherwise other tests + // will likely be borked, because it's global :( defer p.Release() inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{ Type: fs.Pipe, }) - file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, p) + file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, p) + + pipeSize, _, errno := syscall.Syscall(syscall.SYS_FCNTL, uintptr(wfile.FD()), syscall.F_GETPIPE_SZ, 0) + if errno != 0 { + t.Fatalf("fcntl(F_GETPIPE_SZ) failed: %v", errno) + } + t.Logf("Pipe buffer size: %d", pipeSize) - // Construct a segment vec that is larger than the pipe size to trigger an EWOULDBLOCK. - wantBytes := 65536 * 2 + // Construct a segment vec that is larger than the pipe size to trigger an + // EWOULDBLOCK. + wantBytes := int(pipeSize) * 2 writeBuffer := make([]byte, wantBytes) for i := 0; i < wantBytes; i++ { writeBuffer[i] = 'a' } iov := usermem.BytesIOSequence(writeBuffer) n, err := p.Write(ctx, file, iov, 0) - total := n - iov = iov.DropFirst64(n) if err != syserror.ErrWouldBlock { t.Fatalf("Writev got error %v, want %v", err, syserror.ErrWouldBlock) } + if n != int64(pipeSize) { + t.Fatalf("Writev partial write, got: %v, want %v", n, pipeSize) + } + total := n + iov = iov.DropFirst64(n) // Read the entire pipe buf size to make space for the second half. - throwAway := make([]byte, 65536) - if n, err := syscall.Read(fds[0], throwAway); n != len(throwAway) || err != nil { - t.Fatalf("write to pipe got (%d, %v), want (%d, nil)", n, err, len(throwAway)) + readBuffer := make([]byte, n) + if n, err := syscall.Read(fds[0], readBuffer); n != len(readBuffer) || err != nil { + t.Fatalf("write to pipe got (%d, %v), want (%d, nil)", n, err, len(readBuffer)) + } + if !bytes.Equal(readBuffer, writeBuffer[:len(readBuffer)]) { + t.Fatalf("wrong data read from pipe, got: %v, want: %v", readBuffer, writeBuffer) } // This time we should not block. n, err = p.Write(ctx, file, iov, 0) - total += n if err != nil { t.Fatalf("Writev got error %v, want nil", err) } + if n != int64(pipeSize) { + t.Fatalf("Writev partial write, got: %v, want %v", n, pipeSize) + } + total += n // Assert that the result we got back is cumulative. if total != int64(wantBytes) { diff --git a/pkg/sentry/fs/file.go b/pkg/sentry/fs/file.go index f64954457..bb8117f89 100644 --- a/pkg/sentry/fs/file.go +++ b/pkg/sentry/fs/file.go @@ -20,17 +20,17 @@ import ( "sync/atomic" "time" - "gvisor.googlesource.com/gvisor/pkg/amutex" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/lock" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/uniqueid" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/amutex" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs/lock" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/uniqueid" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) var ( @@ -130,14 +130,15 @@ type File struct { // to false respectively. func NewFile(ctx context.Context, dirent *Dirent, flags FileFlags, fops FileOperations) *File { dirent.IncRef() - f := &File{ + f := File{ UniqueID: uniqueid.GlobalFromContext(ctx), Dirent: dirent, FileOperations: fops, flags: flags, } f.mu.Init() - return f + f.EnableLeakCheck("fs.File") + return &f } // DecRef destroys the File when it is no longer referenced. @@ -267,7 +268,7 @@ func (f *File) Readv(ctx context.Context, dst usermem.IOSequence) (int64, error) reads.Increment() n, err := f.FileOperations.Read(ctx, f, dst, f.offset) - if n > 0 { + if n > 0 && !f.flags.NonSeekable { atomic.AddInt64(&f.offset, n) } f.mu.Unlock() @@ -310,9 +311,11 @@ func (f *File) Writev(ctx context.Context, src usermem.IOSequence) (int64, error return 0, syserror.ErrInterrupted } + unlockAppendMu := f.Dirent.Inode.lockAppendMu(f.Flags().Append) // Handle append mode. if f.Flags().Append { if err := f.offsetForAppend(ctx, &f.offset); err != nil { + unlockAppendMu() f.mu.Unlock() return 0, err } @@ -322,6 +325,7 @@ func (f *File) Writev(ctx context.Context, src usermem.IOSequence) (int64, error limit, ok := f.checkLimit(ctx, f.offset) switch { case ok && limit == 0: + unlockAppendMu() f.mu.Unlock() return 0, syserror.ErrExceedsFileSizeLimit case ok: @@ -330,9 +334,10 @@ func (f *File) Writev(ctx context.Context, src usermem.IOSequence) (int64, error // We must hold the lock during the write. n, err := f.FileOperations.Write(ctx, f, src, f.offset) - if n >= 0 { + if n >= 0 && !f.flags.NonSeekable { atomic.StoreInt64(&f.offset, f.offset+n) } + unlockAppendMu() f.mu.Unlock() return n, err } @@ -348,13 +353,11 @@ func (f *File) Pwritev(ctx context.Context, src usermem.IOSequence, offset int64 // However, on Linux, if a file is opened with O_APPEND, pwrite() // appends data to the end of the file, regardless of the value of // offset." + unlockAppendMu := f.Dirent.Inode.lockAppendMu(f.Flags().Append) + defer unlockAppendMu() + if f.Flags().Append { - if !f.mu.Lock(ctx) { - return 0, syserror.ErrInterrupted - } - defer f.mu.Unlock() if err := f.offsetForAppend(ctx, &offset); err != nil { - f.mu.Unlock() return 0, err } } @@ -373,7 +376,7 @@ func (f *File) Pwritev(ctx context.Context, src usermem.IOSequence, offset int64 // offsetForAppend sets the given offset to the end of the file. // -// Precondition: the underlying file mutex should be held. +// Precondition: the file.Dirent.Inode.appendMu mutex should be held for writing. func (f *File) offsetForAppend(ctx context.Context, offset *int64) error { uattr, err := f.Dirent.Inode.UnstableAttr(ctx) if err != nil { diff --git a/pkg/sentry/fs/file_operations.go b/pkg/sentry/fs/file_operations.go index 0f2dfa273..d86f5bf45 100644 --- a/pkg/sentry/fs/file_operations.go +++ b/pkg/sentry/fs/file_operations.go @@ -15,11 +15,11 @@ package fs import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/waiter" ) // SpliceOpts define how a splice works. @@ -155,5 +155,16 @@ type FileOperations interface { // refer. // // Preconditions: The AddressSpace (if any) that io refers to is activated. - Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) + Ioctl(ctx context.Context, file *File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) +} + +// FifoSizer is an interface for setting and getting the size of a pipe. +type FifoSizer interface { + // FifoSize returns the pipe capacity in bytes. + FifoSize(ctx context.Context, file *File) (int64, error) + + // SetFifoSize sets the new pipe capacity in bytes. + // + // The new size is returned (which may be capped). + SetFifoSize(size int64) (int64, error) } diff --git a/pkg/sentry/fs/file_overlay.go b/pkg/sentry/fs/file_overlay.go index 273de1e14..9820f0b13 100644 --- a/pkg/sentry/fs/file_overlay.go +++ b/pkg/sentry/fs/file_overlay.go @@ -17,13 +17,13 @@ package fs import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // overlayFile gets a handle to a file from the upper or lower filesystem @@ -85,12 +85,6 @@ type overlayFileOperations struct { // protected by File.mu of the owning file, which is held during // Readdir and Seek calls. dirCursor string - - // dirCacheMu protects dirCache. - dirCacheMu sync.RWMutex `state:"nosave"` - - // dirCache is cache of DentAttrs from upper and lower Inodes. - dirCache *SortedDentryMap } // Release implements FileOperations.Release. @@ -171,53 +165,68 @@ func (f *overlayFileOperations) Readdir(ctx context.Context, file *File, seriali if root != nil { defer root.DecRef() } + dirCtx := &DirCtx{ Serializer: serializer, DirCursor: &f.dirCursor, } + return DirentReaddir(ctx, file.Dirent, f, root, dirCtx, file.Offset()) +} - // If the directory dirent is frozen, then DirentReaddir will calculate - // the children based off the frozen dirent tree. There is no need to - // call readdir on the upper/lower layers. - if file.Dirent.frozen { - return DirentReaddir(ctx, file.Dirent, f, root, dirCtx, file.Offset()) +// IterateDir implements DirIterator.IterateDir. +func (f *overlayFileOperations) IterateDir(ctx context.Context, d *Dirent, dirCtx *DirCtx, offset int) (int, error) { + o := d.Inode.overlay + + if !d.Inode.MountSource.CacheReaddir() { + // Can't use the dirCache. Simply read the entries. + entries, err := readdirEntries(ctx, o) + if err != nil { + return offset, err + } + n, err := GenericReaddir(dirCtx, entries) + return offset + n, err } - // Otherwise proceed with usual overlay readdir. - o := file.Dirent.Inode.overlay + // Otherwise, use or create cached entries. + + o.dirCacheMu.RLock() + if o.dirCache != nil { + n, err := GenericReaddir(dirCtx, o.dirCache) + o.dirCacheMu.RUnlock() + return offset + n, err + } + o.dirCacheMu.RUnlock() // readdirEntries holds o.copyUpMu to ensure that copy-up does not - // occur while calculating the readir results. + // occur while calculating the readdir results. // // However, it is possible for a copy-up to occur after the call to - // readdirEntries, but before setting f.dirCache. This is OK, since - // copy-up only does not change the children in a way that would affect - // the children returned in dirCache. Copy-up only moves - // files/directories between layers in the overlay. + // readdirEntries, but before setting o.dirCache. This is OK, since + // copy-up does not change the children in a way that would affect the + // children returned in dirCache. Copy-up only moves files/directories + // between layers in the overlay. // - // It is also possible for Readdir to race with a Create operation - // (which may trigger a copy-up during it's execution). Depending on - // whether the Create happens before or after the readdirEntries call, - // the newly created file may or may not appear in the readdir results. - // But this can only be caused by a real race between readdir and - // create syscalls, so it's also OK. - dirCache, err := readdirEntries(ctx, o) - if err != nil { - return file.Offset(), err + // We must hold dirCacheMu around both readdirEntries and setting + // o.dirCache to synchronize with dirCache invalidations done by + // Create, Remove, Rename. + o.dirCacheMu.Lock() + + // We expect dirCache to be nil (we just checked above), but there is a + // chance that a racing call managed to just set it, in which case we + // can use that new value. + if o.dirCache == nil { + dirCache, err := readdirEntries(ctx, o) + if err != nil { + o.dirCacheMu.Unlock() + return offset, err + } + o.dirCache = dirCache } - f.dirCacheMu.Lock() - f.dirCache = dirCache - f.dirCacheMu.Unlock() + o.dirCacheMu.DowngradeLock() + n, err := GenericReaddir(dirCtx, o.dirCache) + o.dirCacheMu.RUnlock() - return DirentReaddir(ctx, file.Dirent, f, root, dirCtx, file.Offset()) -} - -// IterateDir implements DirIterator.IterateDir. -func (f *overlayFileOperations) IterateDir(ctx context.Context, dirCtx *DirCtx, offset int) (int, error) { - f.dirCacheMu.RLock() - n, err := GenericReaddir(dirCtx, f.dirCache) - f.dirCacheMu.RUnlock() return offset + n, err } @@ -338,13 +347,14 @@ func (*overlayFileOperations) ConfigureMMap(ctx context.Context, file *File, opt // preventing us from saving a proper inode mapping for the // file. file.IncRef() - id := &overlayMappingIdentity{ + id := overlayMappingIdentity{ id: opts.MappingIdentity, overlayFile: file, } + id.EnableLeakCheck("fs.overlayMappingIdentity") // Swap out the old MappingIdentity for the wrapped one. - opts.MappingIdentity = id + opts.MappingIdentity = &id return nil } @@ -388,9 +398,49 @@ func (f *overlayFileOperations) UnstableAttr(ctx context.Context, file *File) (U return f.lower.UnstableAttr(ctx) } -// Ioctl implements fs.FileOperations.Ioctl and always returns ENOTTY. -func (*overlayFileOperations) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { - return 0, syserror.ENOTTY +// Ioctl implements fs.FileOperations.Ioctl. +func (f *overlayFileOperations) Ioctl(ctx context.Context, overlayFile *File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { + f.upperMu.Lock() + defer f.upperMu.Unlock() + + if f.upper == nil { + // It's possible that ioctl changes the file. Since we don't know all + // possible ioctls, only allow them to propagate to the upper. Triggering a + // copy up on any ioctl would be too drastic. In the future, it can have a + // list of ioctls that are safe to send to lower and a list that triggers a + // copy up. + return 0, syserror.ENOTTY + } + return f.upper.FileOperations.Ioctl(ctx, f.upper, io, args) +} + +// FifoSize implements FifoSizer.FifoSize. +func (f *overlayFileOperations) FifoSize(ctx context.Context, overlayFile *File) (rv int64, err error) { + err = f.onTop(ctx, overlayFile, func(file *File, ops FileOperations) error { + sz, ok := ops.(FifoSizer) + if !ok { + return syserror.EINVAL + } + rv, err = sz.FifoSize(ctx, file) + return err + }) + return +} + +// SetFifoSize implements FifoSizer.SetFifoSize. +func (f *overlayFileOperations) SetFifoSize(size int64) (rv int64, err error) { + f.upperMu.Lock() + defer f.upperMu.Unlock() + + if f.upper == nil { + // Named pipes cannot be copied up and changes to the lower are prohibited. + return 0, syserror.EINVAL + } + sz, ok := f.upper.FileOperations.(FifoSizer) + if !ok { + return 0, syserror.EINVAL + } + return sz.SetFifoSize(size) } // readdirEntries returns a sorted map of directory entries from the diff --git a/pkg/sentry/fs/file_overlay_test.go b/pkg/sentry/fs/file_overlay_test.go index 6a2b8007c..2fb824d5c 100644 --- a/pkg/sentry/fs/file_overlay_test.go +++ b/pkg/sentry/fs/file_overlay_test.go @@ -18,18 +18,18 @@ import ( "reflect" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/contexttest" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/kernel/contexttest" ) func TestReaddir(t *testing.T) { ctx := contexttest.Context(t) ctx = &rootContext{ Context: ctx, - root: fs.NewDirent(newTestRamfsDir(ctx, nil, nil), "root"), + root: fs.NewDirent(ctx, newTestRamfsDir(ctx, nil, nil), "root"), } for _, test := range []struct { // Test description. @@ -103,7 +103,7 @@ func TestReaddir(t *testing.T) { }, } { t.Run(test.desc, func(t *testing.T) { - openDir, err := test.dir.GetFile(ctx, fs.NewDirent(test.dir, "stub"), fs.FileFlags{Read: true}) + openDir, err := test.dir.GetFile(ctx, fs.NewDirent(ctx, test.dir, "stub"), fs.FileFlags{Read: true}) if err != nil { t.Fatalf("GetFile got error %v, want nil", err) } @@ -126,7 +126,7 @@ func TestReaddirRevalidation(t *testing.T) { ctx := contexttest.Context(t) ctx = &rootContext{ Context: ctx, - root: fs.NewDirent(newTestRamfsDir(ctx, nil, nil), "root"), + root: fs.NewDirent(ctx, newTestRamfsDir(ctx, nil, nil), "root"), } // Create an overlay with two directories, each with one file. @@ -139,7 +139,7 @@ func TestReaddirRevalidation(t *testing.T) { upperDir := upper.InodeOperations.(*dir).InodeOperations.(*ramfs.Dir) // Check that overlay returns the files from both upper and lower. - openDir, err := overlay.GetFile(ctx, fs.NewDirent(overlay, "stub"), fs.FileFlags{Read: true}) + openDir, err := overlay.GetFile(ctx, fs.NewDirent(ctx, overlay, "stub"), fs.FileFlags{Read: true}) if err != nil { t.Fatalf("GetFile got error %v, want nil", err) } @@ -156,7 +156,7 @@ func TestReaddirRevalidation(t *testing.T) { if err := upperDir.Remove(ctx, upper, "a"); err != nil { t.Fatalf("error removing child: %v", err) } - upperDir.AddChild(ctx, "c", fs.NewInode(fsutil.NewSimpleFileInode(ctx, fs.RootOwner, fs.FilePermissions{}, 0), + upperDir.AddChild(ctx, "c", fs.NewInode(ctx, fsutil.NewSimpleFileInode(ctx, fs.RootOwner, fs.FilePermissions{}, 0), upper.MountSource, fs.StableAttr{Type: fs.RegularFile})) // Seek to beginning of the directory and do the readdir again. @@ -186,7 +186,7 @@ func TestReaddirOverlayFrozen(t *testing.T) { overlayInode := fs.NewTestOverlayDir(ctx, upper, lower, false) // Set that overlay as the root. - root := fs.NewDirent(overlayInode, "root") + root := fs.NewDirent(ctx, overlayInode, "root") ctx = &rootContext{ Context: ctx, root: root, diff --git a/pkg/sentry/fs/filesystems.go b/pkg/sentry/fs/filesystems.go index acd84dfcc..b157fd228 100644 --- a/pkg/sentry/fs/filesystems.go +++ b/pkg/sentry/fs/filesystems.go @@ -20,7 +20,7 @@ import ( "strings" "sync" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) // FilesystemFlags matches include/linux/fs.h:file_system_type.fs_flags. diff --git a/pkg/sentry/fs/filetest/BUILD b/pkg/sentry/fs/filetest/BUILD index 05ca72aa0..a9d6d9301 100644 --- a/pkg/sentry/fs/filetest/BUILD +++ b/pkg/sentry/fs/filetest/BUILD @@ -6,7 +6,7 @@ go_library( name = "filetest", testonly = 1, srcs = ["filetest.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/filetest", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/filetest", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/sentry/context", diff --git a/pkg/sentry/fs/filetest/filetest.go b/pkg/sentry/fs/filetest/filetest.go index c0b1b088d..22270a494 100644 --- a/pkg/sentry/fs/filetest/filetest.go +++ b/pkg/sentry/fs/filetest/filetest.go @@ -19,13 +19,13 @@ import ( "fmt" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/anon" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/anon" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/waiter" ) // TestFileOperations is an implementation of the File interface. It provides all @@ -46,7 +46,7 @@ type TestFileOperations struct { // NewTestFile creates and initializes a new test file. func NewTestFile(tb testing.TB) *fs.File { ctx := contexttest.Context(tb) - dirent := fs.NewDirent(anon.NewInode(ctx), "test") + dirent := fs.NewDirent(ctx, anon.NewInode(ctx), "test") return fs.NewFile(ctx, dirent, fs.FileFlags{}, &TestFileOperations{}) } diff --git a/pkg/sentry/fs/flags.go b/pkg/sentry/fs/flags.go index 5c8cb773f..1278f9c78 100644 --- a/pkg/sentry/fs/flags.go +++ b/pkg/sentry/fs/flags.go @@ -15,7 +15,7 @@ package fs import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) // FileFlags encodes file flags. @@ -57,6 +57,9 @@ type FileFlags struct { // Linux sets this flag for all files. Since gVisor is only compatible // with 64-bit Linux, it also sets this flag for all files. LargeFile bool + + // NonSeekable indicates that file.offset isn't used. + NonSeekable bool } // SettableFileFlags is a subset of FileFlags above that can be changed diff --git a/pkg/sentry/fs/fs.go b/pkg/sentry/fs/fs.go index 632055cce..8b2a5e6b2 100644 --- a/pkg/sentry/fs/fs.go +++ b/pkg/sentry/fs/fs.go @@ -56,8 +56,8 @@ package fs import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" ) var ( diff --git a/pkg/sentry/fs/fsutil/BUILD b/pkg/sentry/fs/fsutil/BUILD index 44f43b965..6499f87ac 100644 --- a/pkg/sentry/fs/fsutil/BUILD +++ b/pkg/sentry/fs/fsutil/BUILD @@ -7,8 +7,8 @@ go_template_instance( name = "dirty_set_impl", out = "dirty_set_impl.go", imports = { - "memmap": "gvisor.googlesource.com/gvisor/pkg/sentry/memmap", - "platform": "gvisor.googlesource.com/gvisor/pkg/sentry/platform", + "memmap": "gvisor.dev/gvisor/pkg/sentry/memmap", + "platform": "gvisor.dev/gvisor/pkg/sentry/platform", }, package = "fsutil", prefix = "Dirty", @@ -25,7 +25,7 @@ go_template_instance( name = "frame_ref_set_impl", out = "frame_ref_set_impl.go", imports = { - "platform": "gvisor.googlesource.com/gvisor/pkg/sentry/platform", + "platform": "gvisor.dev/gvisor/pkg/sentry/platform", }, package = "fsutil", prefix = "frameRef", @@ -42,8 +42,8 @@ go_template_instance( name = "file_range_set_impl", out = "file_range_set_impl.go", imports = { - "memmap": "gvisor.googlesource.com/gvisor/pkg/sentry/memmap", - "platform": "gvisor.googlesource.com/gvisor/pkg/sentry/platform", + "memmap": "gvisor.dev/gvisor/pkg/sentry/memmap", + "platform": "gvisor.dev/gvisor/pkg/sentry/platform", }, package = "fsutil", prefix = "FileRange", @@ -74,7 +74,7 @@ go_library( "inode.go", "inode_cached.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/fsutil", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/fs/fsutil/dirty_set.go b/pkg/sentry/fs/fsutil/dirty_set.go index f1451d77a..12132680b 100644 --- a/pkg/sentry/fs/fsutil/dirty_set.go +++ b/pkg/sentry/fs/fsutil/dirty_set.go @@ -17,11 +17,11 @@ package fsutil import ( "math" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // DirtySet maps offsets into a memmap.Mappable to DirtyInfo. It is used to diff --git a/pkg/sentry/fs/fsutil/dirty_set_test.go b/pkg/sentry/fs/fsutil/dirty_set_test.go index d9c68baa3..75575d994 100644 --- a/pkg/sentry/fs/fsutil/dirty_set_test.go +++ b/pkg/sentry/fs/fsutil/dirty_set_test.go @@ -18,8 +18,8 @@ import ( "reflect" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) func TestDirtySet(t *testing.T) { diff --git a/pkg/sentry/fs/fsutil/file.go b/pkg/sentry/fs/fsutil/file.go index 9381963d0..626b9126a 100644 --- a/pkg/sentry/fs/fsutil/file.go +++ b/pkg/sentry/fs/fsutil/file.go @@ -15,13 +15,13 @@ package fsutil import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // FileNoopRelease implements fs.FileOperations.Release for files that have no @@ -219,7 +219,7 @@ func GenericConfigureMMap(file *fs.File, m memmap.Mappable, opts *memmap.MMapOpt type FileNoIoctl struct{} // Ioctl implements fs.FileOperations.Ioctl. -func (FileNoIoctl) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (FileNoIoctl) Ioctl(context.Context, *fs.File, usermem.IO, arch.SyscallArguments) (uintptr, error) { return 0, syserror.ENOTTY } @@ -285,7 +285,7 @@ func NewStaticDirFileOperations(dentries *fs.SortedDentryMap) *StaticDirFileOper } // IterateDir implements DirIterator.IterateDir. -func (sdfo *StaticDirFileOperations) IterateDir(ctx context.Context, dirCtx *fs.DirCtx, offset int) (int, error) { +func (sdfo *StaticDirFileOperations) IterateDir(ctx context.Context, d *fs.Dirent, dirCtx *fs.DirCtx, offset int) (int, error) { n, err := fs.GenericReaddir(dirCtx, sdfo.dentryMap) return offset + n, err } diff --git a/pkg/sentry/fs/fsutil/file_range_set.go b/pkg/sentry/fs/fsutil/file_range_set.go index b5ac6c71c..0a5466b0a 100644 --- a/pkg/sentry/fs/fsutil/file_range_set.go +++ b/pkg/sentry/fs/fsutil/file_range_set.go @@ -19,13 +19,13 @@ import ( "io" "math" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // FileRangeSet maps offsets into a memmap.Mappable to offsets into a diff --git a/pkg/sentry/fs/fsutil/frame_ref_set.go b/pkg/sentry/fs/fsutil/frame_ref_set.go index 6565c28c8..dd63db32b 100644 --- a/pkg/sentry/fs/fsutil/frame_ref_set.go +++ b/pkg/sentry/fs/fsutil/frame_ref_set.go @@ -17,7 +17,7 @@ package fsutil import ( "math" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/platform" ) type frameRefSetFunctions struct{} diff --git a/pkg/sentry/fs/fsutil/host_file_mapper.go b/pkg/sentry/fs/fsutil/host_file_mapper.go index 2bdfc0db6..e239f12a5 100644 --- a/pkg/sentry/fs/fsutil/host_file_mapper.go +++ b/pkg/sentry/fs/fsutil/host_file_mapper.go @@ -19,11 +19,11 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // HostFileMapper caches mappings of an arbitrary host file descriptor. It is diff --git a/pkg/sentry/fs/fsutil/host_file_mapper_unsafe.go b/pkg/sentry/fs/fsutil/host_file_mapper_unsafe.go index 7167be263..ad11a0573 100644 --- a/pkg/sentry/fs/fsutil/host_file_mapper_unsafe.go +++ b/pkg/sentry/fs/fsutil/host_file_mapper_unsafe.go @@ -17,7 +17,7 @@ package fsutil import ( "unsafe" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/safemem" ) func (*HostFileMapper) unsafeBlockFromChunkMapping(addr uintptr) safemem.Block { diff --git a/pkg/sentry/fs/fsutil/host_mappable.go b/pkg/sentry/fs/fsutil/host_mappable.go index ad0518b8f..d2495cb83 100644 --- a/pkg/sentry/fs/fsutil/host_mappable.go +++ b/pkg/sentry/fs/fsutil/host_mappable.go @@ -18,12 +18,12 @@ import ( "math" "sync" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // HostMappable implements memmap.Mappable and platform.File over a diff --git a/pkg/sentry/fs/fsutil/inode.go b/pkg/sentry/fs/fsutil/inode.go index 925887335..4e100a402 100644 --- a/pkg/sentry/fs/fsutil/inode.go +++ b/pkg/sentry/fs/fsutil/inode.go @@ -17,13 +17,13 @@ package fsutil import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // SimpleFileInode is a simple implementation of InodeOperations. diff --git a/pkg/sentry/fs/fsutil/inode_cached.go b/pkg/sentry/fs/fsutil/inode_cached.go index 7bee2eb5f..ed62049a9 100644 --- a/pkg/sentry/fs/fsutil/inode_cached.go +++ b/pkg/sentry/fs/fsutil/inode_cached.go @@ -19,17 +19,17 @@ import ( "io" "sync" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/time" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // Lock order (compare the lock order model in mm/mm.go): diff --git a/pkg/sentry/fs/fsutil/inode_cached_test.go b/pkg/sentry/fs/fsutil/inode_cached_test.go index be3d4b6fc..dc19255ed 100644 --- a/pkg/sentry/fs/fsutil/inode_cached_test.go +++ b/pkg/sentry/fs/fsutil/inode_cached_test.go @@ -19,14 +19,14 @@ import ( "io" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) type noopBackingFile struct{} @@ -253,11 +253,11 @@ func (noopMappingSpace) Invalidate(ar usermem.AddrRange, opts memmap.InvalidateO } func anonInode(ctx context.Context) *fs.Inode { - return fs.NewInode(&SimpleFileInode{ + return fs.NewInode(ctx, &SimpleFileInode{ InodeSimpleAttributes: NewInodeSimpleAttributes(ctx, fs.FileOwnerFromContext(ctx), fs.FilePermissions{ User: fs.PermMask{Read: true, Write: true}, }, 0), - }, fs.NewPseudoMountSource(), fs.StableAttr{ + }, fs.NewPseudoMountSource(ctx), fs.StableAttr{ Type: fs.Anonymous, BlockSize: usermem.PageSize, }) @@ -276,7 +276,7 @@ func TestRead(t *testing.T) { // Construct a 3-page file. buf := pagesOf('a', 'b', 'c') - file := fs.NewFile(ctx, fs.NewDirent(anonInode(ctx), "anon"), fs.FileFlags{}, nil) + file := fs.NewFile(ctx, fs.NewDirent(ctx, anonInode(ctx), "anon"), fs.FileFlags{}, nil) uattr := fs.UnstableAttr{ Size: int64(len(buf)), } diff --git a/pkg/sentry/fs/g3doc/inotify.md b/pkg/sentry/fs/g3doc/inotify.md index 1e99a3357..71a577d9d 100644 --- a/pkg/sentry/fs/g3doc/inotify.md +++ b/pkg/sentry/fs/g3doc/inotify.md @@ -9,7 +9,7 @@ For the most part, the sentry implementation of inotify mirrors the Linux architecture. Inotify instances (i.e. the fd returned by inotify_init(2)) are backed by a pseudo-filesystem. Events are generated from various places in the sentry, including the [syscall layer][syscall_dir], the [vfs layer][dirent] and -the [process fd table][fd_map]. Watches are stored in inodes and generated +the [process fd table][fd_table]. Watches are stored in inodes and generated events are queued to the inotify instance owning the watches for delivery to the user. @@ -112,11 +112,11 @@ attempts to queue a new event, it is already holding `fs.Watches.mu`. If we used `Inotify.mu` to also protect the event queue, this would violate the above lock ordering. -[dirent]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/fs/dirent.go -[event]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/fs/inotify_event.go -[fd_map]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/kernel/fd_map.go -[inode]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/fs/inode.go -[inode_watches]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/fs/inode_inotify.go -[inotify]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/fs/inotify.go -[syscall_dir]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/syscalls/linux/ -[watch]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/fs/inotify_watch.go +[dirent]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/fs/dirent.go +[event]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/fs/inotify_event.go +[fd_table]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/kernel/fd_table.go +[inode]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/fs/inode.go +[inode_watches]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/fs/inode_inotify.go +[inotify]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/fs/inotify.go +[syscall_dir]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/syscalls/linux/ +[watch]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/fs/inotify_watch.go diff --git a/pkg/sentry/fs/gofer/BUILD b/pkg/sentry/fs/gofer/BUILD index f2c79b475..6b993928c 100644 --- a/pkg/sentry/fs/gofer/BUILD +++ b/pkg/sentry/fs/gofer/BUILD @@ -21,7 +21,7 @@ go_library( "socket.go", "util.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/gofer", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/fs/gofer/attr.go b/pkg/sentry/fs/gofer/attr.go index c572f3396..4848e2374 100644 --- a/pkg/sentry/fs/gofer/attr.go +++ b/pkg/sentry/fs/gofer/attr.go @@ -17,12 +17,12 @@ package gofer import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // getattr returns the 9p attributes of the p9.File. On success, Mode, Size, and RDev diff --git a/pkg/sentry/fs/gofer/cache_policy.go b/pkg/sentry/fs/gofer/cache_policy.go index c59344589..cc11c6339 100644 --- a/pkg/sentry/fs/gofer/cache_policy.go +++ b/pkg/sentry/fs/gofer/cache_policy.go @@ -17,8 +17,8 @@ package gofer import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // cachePolicy is a 9p cache policy. It has methods that determine what to diff --git a/pkg/sentry/fs/gofer/context_file.go b/pkg/sentry/fs/gofer/context_file.go index be53ac4d9..44b72582a 100644 --- a/pkg/sentry/fs/gofer/context_file.go +++ b/pkg/sentry/fs/gofer/context_file.go @@ -15,9 +15,9 @@ package gofer import ( - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" ) // contextFile is a wrapper around p9.File that notifies the context that diff --git a/pkg/sentry/fs/gofer/device.go b/pkg/sentry/fs/gofer/device.go index 1de6c247c..cbd3c5da2 100644 --- a/pkg/sentry/fs/gofer/device.go +++ b/pkg/sentry/fs/gofer/device.go @@ -14,7 +14,7 @@ package gofer -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" // goferDevice is the gofer virtual device. var goferDevice = device.NewAnonMultiDevice() diff --git a/pkg/sentry/fs/gofer/file.go b/pkg/sentry/fs/gofer/file.go index fb4f50113..9e2e412cd 100644 --- a/pkg/sentry/fs/gofer/file.go +++ b/pkg/sentry/fs/gofer/file.go @@ -19,17 +19,17 @@ import ( "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) var ( @@ -137,7 +137,7 @@ func (f *fileOperations) Readdir(ctx context.Context, file *fs.File, serializer } // IterateDir implements fs.DirIterator.IterateDir. -func (f *fileOperations) IterateDir(ctx context.Context, dirCtx *fs.DirCtx, offset int) (int, error) { +func (f *fileOperations) IterateDir(ctx context.Context, d *fs.Dirent, dirCtx *fs.DirCtx, offset int) (int, error) { f.inodeOperations.readdirMu.Lock() defer f.inodeOperations.readdirMu.Unlock() diff --git a/pkg/sentry/fs/gofer/file_state.go b/pkg/sentry/fs/gofer/file_state.go index 31264e065..9aa68a70e 100644 --- a/pkg/sentry/fs/gofer/file_state.go +++ b/pkg/sentry/fs/gofer/file_state.go @@ -17,8 +17,8 @@ package gofer import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // afterLoad is invoked by stateify. diff --git a/pkg/sentry/fs/gofer/fs.go b/pkg/sentry/fs/gofer/fs.go index 6ab89fcc2..69999dc28 100644 --- a/pkg/sentry/fs/gofer/fs.go +++ b/pkg/sentry/fs/gofer/fs.go @@ -20,9 +20,9 @@ import ( "fmt" "strconv" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // The following are options defined by the Linux 9p client that we support, diff --git a/pkg/sentry/fs/gofer/gofer_test.go b/pkg/sentry/fs/gofer/gofer_test.go index 29d34da7e..7fc3c32ae 100644 --- a/pkg/sentry/fs/gofer/gofer_test.go +++ b/pkg/sentry/fs/gofer/gofer_test.go @@ -20,11 +20,11 @@ import ( "testing" "time" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/p9/p9test" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/p9/p9test" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // rootTest runs a test with a p9 mock and an fs.InodeOperations created from @@ -62,8 +62,8 @@ func rootTest(t *testing.T, name string, cp cachePolicy, fn func(context.Context sattr, rootInodeOperations := newInodeOperations(ctx, s, contextFile{ file: rootFile, }, root.QID, p9.AttrMaskAll(), root.Attr, false /* socket */) - m := fs.NewMountSource(s, &filesystem{}, fs.MountSourceFlags{}) - rootInode := fs.NewInode(rootInodeOperations, m, sattr) + m := fs.NewMountSource(ctx, s, &filesystem{}, fs.MountSourceFlags{}) + rootInode := fs.NewInode(ctx, rootInodeOperations, m, sattr) // Ensure that the cache is fully invalidated, so that any // close actions actually take place before the full harness is @@ -207,7 +207,7 @@ func TestRevalidation(t *testing.T) { name := fmt.Sprintf("cachepolicy=%s", test.cachePolicy) rootTest(t, name, test.cachePolicy, func(ctx context.Context, h *p9test.Harness, rootFile *p9test.Mock, rootInode *fs.Inode) { // Wrap in a dirent object. - rootDir := fs.NewDirent(rootInode, "root") + rootDir := fs.NewDirent(ctx, rootInode, "root") // Create a mock file a child of the root. We save when // this is generated, so that when the time changed, we diff --git a/pkg/sentry/fs/gofer/handles.go b/pkg/sentry/fs/gofer/handles.go index c7098cd36..27eeae3d9 100644 --- a/pkg/sentry/fs/gofer/handles.go +++ b/pkg/sentry/fs/gofer/handles.go @@ -17,14 +17,14 @@ package gofer import ( "io" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/secio" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/secio" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/safemem" ) // handles are the open handles of a gofer file. They are reference counted to @@ -79,11 +79,12 @@ func newHandles(ctx context.Context, file contextFile, flags fs.FileFlags) (*han newFile.close(ctx) return nil, err } - h := &handles{ + h := handles{ File: newFile, Host: hostFile, } - return h, nil + h.EnableLeakCheck("gofer.handles") + return &h, nil } type handleReadWriter struct { diff --git a/pkg/sentry/fs/gofer/inode.go b/pkg/sentry/fs/gofer/inode.go index dcb3b2880..95b064aea 100644 --- a/pkg/sentry/fs/gofer/inode.go +++ b/pkg/sentry/fs/gofer/inode.go @@ -19,19 +19,19 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fdpipe" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/host" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fdpipe" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/host" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/syserror" ) // inodeOperations implements fs.InodeOperations. diff --git a/pkg/sentry/fs/gofer/inode_state.go b/pkg/sentry/fs/gofer/inode_state.go index ac22ee4b1..0b2eedb7c 100644 --- a/pkg/sentry/fs/gofer/inode_state.go +++ b/pkg/sentry/fs/gofer/inode_state.go @@ -20,11 +20,11 @@ import ( "path/filepath" "strings" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/time" ) // Some fs implementations may not support atime, ctime, or mtime in getattr. diff --git a/pkg/sentry/fs/gofer/path.go b/pkg/sentry/fs/gofer/path.go index 092f8b586..8c17603f8 100644 --- a/pkg/sentry/fs/gofer/path.go +++ b/pkg/sentry/fs/gofer/path.go @@ -18,13 +18,13 @@ import ( "fmt" "syscall" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/syserror" ) // maxFilenameLen is the maximum length of a filename. This is dictated by 9P's @@ -73,7 +73,7 @@ func (i *inodeOperations) Lookup(ctx context.Context, dir *fs.Inode, name string sattr, node := newInodeOperations(ctx, i.fileState.s, newFile, qids[0], mask, p9attr, false) // Construct a positive Dirent. - return fs.NewDirent(fs.NewInode(node, dir.MountSource, sattr), name), nil + return fs.NewDirent(ctx, fs.NewInode(ctx, node, dir.MountSource, sattr), name), nil } // Creates a new Inode at name and returns its File based on the session's cache policy. @@ -141,20 +141,21 @@ func (i *inodeOperations) Create(ctx context.Context, dir *fs.Inode, name string sattr, iops := newInodeOperations(ctx, i.fileState.s, unopened, qid, mask, p9attr, false) // Construct the positive Dirent. - d := fs.NewDirent(fs.NewInode(iops, dir.MountSource, sattr), name) + d := fs.NewDirent(ctx, fs.NewInode(ctx, iops, dir.MountSource, sattr), name) defer d.DecRef() // Construct the new file, caching the handles if allowed. - h := &handles{ + h := handles{ File: newFile, Host: hostFile, } + h.EnableLeakCheck("gofer.handles") if iops.fileState.canShareHandles() { iops.fileState.handlesMu.Lock() - iops.fileState.setSharedHandlesLocked(flags, h) + iops.fileState.setSharedHandlesLocked(flags, &h) iops.fileState.handlesMu.Unlock() } - return NewFile(ctx, d, name, flags, iops, h), nil + return NewFile(ctx, d, name, flags, iops, &h), nil } // CreateLink uses Create to create a symlink between oldname and newname. @@ -277,7 +278,7 @@ func (i *inodeOperations) Bind(ctx context.Context, dir *fs.Inode, name string, sattr, iops := newInodeOperations(ctx, i.fileState.s, unopened, qid, mask, attr, true) // Construct the positive Dirent. - childDir := fs.NewDirent(fs.NewInode(iops, dir.MountSource, sattr), name) + childDir := fs.NewDirent(ctx, fs.NewInode(ctx, iops, dir.MountSource, sattr), name) i.session().endpoints.add(key, childDir, ep) return childDir, nil } diff --git a/pkg/sentry/fs/gofer/session.go b/pkg/sentry/fs/gofer/session.go index 085a358fe..69d08a627 100644 --- a/pkg/sentry/fs/gofer/session.go +++ b/pkg/sentry/fs/gofer/session.go @@ -18,18 +18,18 @@ import ( "fmt" "sync" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/unet" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/unet" ) // DefaultDirentCacheSize is the default dirent cache size for 9P mounts. It can -// be adjusted independentely from the other dirent caches. +// be adjusted independently from the other dirent caches. var DefaultDirentCacheSize uint64 = fs.DefaultDirentCacheSize // +stateify savable @@ -145,16 +145,21 @@ func (s *session) Destroy() { s.client.Close() } -// Revalidate implements MountSource.Revalidate. +// Revalidate implements MountSourceOperations.Revalidate. func (s *session) Revalidate(ctx context.Context, name string, parent, child *fs.Inode) bool { return s.cachePolicy.revalidate(ctx, name, parent, child) } -// Keep implements MountSource.Keep. +// Keep implements MountSourceOperations.Keep. func (s *session) Keep(d *fs.Dirent) bool { return s.cachePolicy.keep(d) } +// CacheReaddir implements MountSourceOperations.CacheReaddir. +func (s *session) CacheReaddir() bool { + return s.cachePolicy.cacheReaddir() +} + // ResetInodeMappings implements fs.MountSourceOperations.ResetInodeMappings. func (s *session) ResetInodeMappings() { s.inodeMappings = make(map[uint64]string) @@ -236,7 +241,7 @@ func Root(ctx context.Context, dev string, filesystem fs.Filesystem, superBlockF } // Construct the session. - s := &session{ + s := session{ connID: dev, msize: o.msize, version: o.version, @@ -245,13 +250,14 @@ func Root(ctx context.Context, dev string, filesystem fs.Filesystem, superBlockF superBlockFlags: superBlockFlags, mounter: mounter, } + s.EnableLeakCheck("gofer.session") if o.privateunixsocket { s.endpoints = newEndpointMaps() } // Construct the MountSource with the session and superBlockFlags. - m := fs.NewMountSource(s, filesystem, superBlockFlags) + m := fs.NewMountSource(ctx, &s, filesystem, superBlockFlags) // Given that gofer files can consume host FDs, restrict the number // of files that can be held by the cache. @@ -285,8 +291,8 @@ func Root(ctx context.Context, dev string, filesystem fs.Filesystem, superBlockF return nil, err } - sattr, iops := newInodeOperations(ctx, s, s.attach, qid, valid, attr, false) - return fs.NewInode(iops, m, sattr), nil + sattr, iops := newInodeOperations(ctx, &s, s.attach, qid, valid, attr, false) + return fs.NewInode(ctx, iops, m, sattr), nil } // newEndpointMaps creates a new endpointMaps. diff --git a/pkg/sentry/fs/gofer/session_state.go b/pkg/sentry/fs/gofer/session_state.go index 68fbf3417..d045e04ff 100644 --- a/pkg/sentry/fs/gofer/session_state.go +++ b/pkg/sentry/fs/gofer/session_state.go @@ -17,10 +17,10 @@ package gofer import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/unet" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/unet" ) // beforeSave is invoked by stateify. @@ -111,5 +111,4 @@ func (s *session) afterLoad() { panic("failed to restore endpoint maps: " + err.Error()) } } - } diff --git a/pkg/sentry/fs/gofer/socket.go b/pkg/sentry/fs/gofer/socket.go index 7ac0a421f..a45a8f36c 100644 --- a/pkg/sentry/fs/gofer/socket.go +++ b/pkg/sentry/fs/gofer/socket.go @@ -15,14 +15,15 @@ package gofer import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/host" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/host" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/waiter" ) // BoundEndpoint returns a gofer-backed transport.BoundEndpoint. @@ -75,7 +76,7 @@ func sockTypeToP9(t linux.SockType) (p9.ConnectFlags, bool) { } // BidirectionalConnect implements ConnectableEndpoint.BidirectionalConnect. -func (e *endpoint) BidirectionalConnect(ce transport.ConnectingEndpoint, returnConnect func(transport.Receiver, transport.ConnectedEndpoint)) *syserr.Error { +func (e *endpoint) BidirectionalConnect(ctx context.Context, ce transport.ConnectingEndpoint, returnConnect func(transport.Receiver, transport.ConnectedEndpoint)) *syserr.Error { cf, ok := sockTypeToP9(ce.Type()) if !ok { return syserr.ErrConnectionRefused @@ -100,7 +101,7 @@ func (e *endpoint) BidirectionalConnect(ce transport.ConnectingEndpoint, returnC return syserr.ErrConnectionRefused } - c, serr := host.NewConnectedEndpoint(hostFile, ce.WaiterQueue(), e.path) + c, serr := host.NewConnectedEndpoint(ctx, hostFile, ce.WaiterQueue(), e.path) if serr != nil { ce.Unlock() log.Warningf("Gofer returned invalid host socket for BidirectionalConnect; file %+v flags %+v: %v", e.file, cf, serr) @@ -116,13 +117,13 @@ func (e *endpoint) BidirectionalConnect(ce transport.ConnectingEndpoint, returnC // UnidirectionalConnect implements // transport.BoundEndpoint.UnidirectionalConnect. -func (e *endpoint) UnidirectionalConnect() (transport.ConnectedEndpoint, *syserr.Error) { +func (e *endpoint) UnidirectionalConnect(ctx context.Context) (transport.ConnectedEndpoint, *syserr.Error) { hostFile, err := e.file.Connect(p9.DgramSocket) if err != nil { return nil, syserr.ErrConnectionRefused } - c, serr := host.NewConnectedEndpoint(hostFile, &waiter.Queue{}, e.path) + c, serr := host.NewConnectedEndpoint(ctx, hostFile, &waiter.Queue{}, e.path) if serr != nil { log.Warningf("Gofer returned invalid host socket for UnidirectionalConnect; file %+v: %v", e.file, serr) return nil, serr diff --git a/pkg/sentry/fs/gofer/util.go b/pkg/sentry/fs/gofer/util.go index d0e1096ce..848e6812b 100644 --- a/pkg/sentry/fs/gofer/util.go +++ b/pkg/sentry/fs/gofer/util.go @@ -17,9 +17,9 @@ package gofer import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/p9" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/p9" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) func utimes(ctx context.Context, file contextFile, ts fs.TimeSpec) error { diff --git a/pkg/sentry/fs/host/BUILD b/pkg/sentry/fs/host/BUILD index ea2ca11bf..b1080fb1a 100644 --- a/pkg/sentry/fs/host/BUILD +++ b/pkg/sentry/fs/host/BUILD @@ -22,7 +22,7 @@ go_library( "util.go", "util_unsafe.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/host", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/host", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/fs/host/control.go b/pkg/sentry/fs/host/control.go index 9ebb9bbb3..5532ff5a0 100644 --- a/pkg/sentry/fs/host/control.go +++ b/pkg/sentry/fs/host/control.go @@ -17,10 +17,10 @@ package host import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/control" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/socket/control" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" ) type scmRights struct { diff --git a/pkg/sentry/fs/host/descriptor.go b/pkg/sentry/fs/host/descriptor.go index ffcd57a94..2a4d1b291 100644 --- a/pkg/sentry/fs/host/descriptor.go +++ b/pkg/sentry/fs/host/descriptor.go @@ -19,9 +19,9 @@ import ( "path" "syscall" - "gvisor.googlesource.com/gvisor/pkg/fdnotifier" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/waiter" ) // descriptor wraps a host fd. diff --git a/pkg/sentry/fs/host/descriptor_test.go b/pkg/sentry/fs/host/descriptor_test.go index ff08e43af..4205981f5 100644 --- a/pkg/sentry/fs/host/descriptor_test.go +++ b/pkg/sentry/fs/host/descriptor_test.go @@ -20,8 +20,8 @@ import ( "syscall" "testing" - "gvisor.googlesource.com/gvisor/pkg/fdnotifier" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/waiter" ) func TestDescriptorRelease(t *testing.T) { diff --git a/pkg/sentry/fs/host/device.go b/pkg/sentry/fs/host/device.go index 055024c44..484f0b58b 100644 --- a/pkg/sentry/fs/host/device.go +++ b/pkg/sentry/fs/host/device.go @@ -15,7 +15,7 @@ package host import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/device" ) // hostFileDevice is the host file virtual device. diff --git a/pkg/sentry/fs/host/file.go b/pkg/sentry/fs/host/file.go index ad0a3ec85..f6c626f2c 100644 --- a/pkg/sentry/fs/host/file.go +++ b/pkg/sentry/fs/host/file.go @@ -18,18 +18,18 @@ import ( "fmt" "syscall" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/fdnotifier" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/secio" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/secio" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // fileOperations implements fs.FileOperations for a host file descriptor. @@ -109,7 +109,7 @@ func newFileFromDonatedFD(ctx context.Context, donated int, mounter fs.FileOwner iops := inode.InodeOperations.(*inodeOperations) name := fmt.Sprintf("host:[%d]", inode.StableAttr.InodeID) - dirent := fs.NewDirent(inode, name) + dirent := fs.NewDirent(ctx, inode, name) defer dirent.DecRef() if isTTY { @@ -179,7 +179,7 @@ func (f *fileOperations) Readdir(ctx context.Context, file *fs.File, serializer } // IterateDir implements fs.DirIterator.IterateDir. -func (f *fileOperations) IterateDir(ctx context.Context, dirCtx *fs.DirCtx, offset int) (int, error) { +func (f *fileOperations) IterateDir(ctx context.Context, d *fs.Dirent, dirCtx *fs.DirCtx, offset int) (int, error) { if f.dirinfo == nil { f.dirinfo = new(dirInfo) f.dirinfo.buf = make([]byte, usermem.PageSize) diff --git a/pkg/sentry/fs/host/fs.go b/pkg/sentry/fs/host/fs.go index b1b8dc0b6..68d2697c0 100644 --- a/pkg/sentry/fs/host/fs.go +++ b/pkg/sentry/fs/host/fs.go @@ -23,9 +23,9 @@ import ( "strconv" "strings" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // FilesystemName is the name under which Filesystem is registered. @@ -262,7 +262,7 @@ func childDentAttrs(ctx context.Context, d *fs.Dirent) map[string]fs.DentAttr { // newMountSource constructs a new host fs.MountSource // relative to a root path. The root should match the mount point. func newMountSource(ctx context.Context, root string, mounter fs.FileOwner, filesystem fs.Filesystem, flags fs.MountSourceFlags, dontTranslateOwnership bool) *fs.MountSource { - return fs.NewMountSource(&superOperations{ + return fs.NewMountSource(ctx, &superOperations{ root: root, inodeMappings: make(map[uint64]string), mounter: mounter, diff --git a/pkg/sentry/fs/host/fs_test.go b/pkg/sentry/fs/host/fs_test.go index 16c89ddf1..c6852ee30 100644 --- a/pkg/sentry/fs/host/fs_test.go +++ b/pkg/sentry/fs/host/fs_test.go @@ -23,9 +23,9 @@ import ( "sort" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // newTestMountNamespace creates a MountNamespace with a ramfs root. diff --git a/pkg/sentry/fs/host/inode.go b/pkg/sentry/fs/host/inode.go index 7a230e426..679d8321a 100644 --- a/pkg/sentry/fs/host/inode.go +++ b/pkg/sentry/fs/host/inode.go @@ -18,18 +18,18 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/secio" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/secio" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // inodeOperations implements fs.InodeOperations for an fs.Inodes backed @@ -205,7 +205,7 @@ func newInode(ctx context.Context, msrc *fs.MountSource, fd int, saveable bool, } // Return the fs.Inode. - return fs.NewInode(iops, msrc, fileState.sattr), nil + return fs.NewInode(ctx, iops, msrc, fileState.sattr), nil } // Mappable implements fs.InodeOperations.Mappable. @@ -245,7 +245,7 @@ func (i *inodeOperations) Lookup(ctx context.Context, dir *fs.Inode, name string } // Return the fs.Dirent. - return fs.NewDirent(inode, name), nil + return fs.NewDirent(ctx, inode, name), nil } // Create implements fs.InodeOperations.Create. @@ -265,7 +265,7 @@ func (i *inodeOperations) Create(ctx context.Context, dir *fs.Inode, name string return nil, err } - d := fs.NewDirent(inode, name) + d := fs.NewDirent(ctx, inode, name) defer d.DecRef() return inode.GetFile(ctx, d, flags) } diff --git a/pkg/sentry/fs/host/inode_state.go b/pkg/sentry/fs/host/inode_state.go index 26cc755bc..b267ec305 100644 --- a/pkg/sentry/fs/host/inode_state.go +++ b/pkg/sentry/fs/host/inode_state.go @@ -18,9 +18,9 @@ import ( "fmt" "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // beforeSave is invoked by stateify. diff --git a/pkg/sentry/fs/host/inode_test.go b/pkg/sentry/fs/host/inode_test.go index ad1878b5a..2d959f10d 100644 --- a/pkg/sentry/fs/host/inode_test.go +++ b/pkg/sentry/fs/host/inode_test.go @@ -21,8 +21,8 @@ import ( "syscall" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // TestMultipleReaddir verifies that multiple Readdir calls return the same @@ -56,7 +56,7 @@ func TestMultipleReaddir(t *testing.T) { t.Fatalf("Failed to create inode: %v", err) } - dirent := fs.NewDirent(n, "readdir") + dirent := fs.NewDirent(ctx, n, "readdir") openFile, err := n.GetFile(ctx, dirent, fs.FileFlags{Read: true}) if err != nil { t.Fatalf("Failed to get file: %v", err) @@ -64,12 +64,12 @@ func TestMultipleReaddir(t *testing.T) { defer openFile.DecRef() c1 := &fs.DirCtx{DirCursor: new(string)} - if _, err := openFile.FileOperations.(*fileOperations).IterateDir(ctx, c1, 0); err != nil { + if _, err := openFile.FileOperations.(*fileOperations).IterateDir(ctx, dirent, c1, 0); err != nil { t.Fatalf("First Readdir failed: %v", err) } c2 := &fs.DirCtx{DirCursor: new(string)} - if _, err := openFile.FileOperations.(*fileOperations).IterateDir(ctx, c2, 0); err != nil { + if _, err := openFile.FileOperations.(*fileOperations).IterateDir(ctx, dirent, c2, 0); err != nil { t.Errorf("Second Readdir failed: %v", err) } diff --git a/pkg/sentry/fs/host/ioctl_unsafe.go b/pkg/sentry/fs/host/ioctl_unsafe.go index b5a85c4d9..271582e54 100644 --- a/pkg/sentry/fs/host/ioctl_unsafe.go +++ b/pkg/sentry/fs/host/ioctl_unsafe.go @@ -18,7 +18,7 @@ import ( "syscall" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) func ioctlGetTermios(fd int) (*linux.Termios, error) { diff --git a/pkg/sentry/fs/host/socket.go b/pkg/sentry/fs/host/socket.go index 305eea718..44c4ee5f2 100644 --- a/pkg/sentry/fs/host/socket.go +++ b/pkg/sentry/fs/host/socket.go @@ -19,22 +19,22 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/fdnotifier" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/control" - unixsocket "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/uniqueid" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/unet" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/socket/control" + unixsocket "gvisor.dev/gvisor/pkg/sentry/socket/unix" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/uniqueid" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/unet" + "gvisor.dev/gvisor/pkg/waiter" ) // maxSendBufferSize is the maximum host send buffer size allowed for endpoint. @@ -47,12 +47,12 @@ const maxSendBufferSize = 8 << 20 // // +stateify savable type ConnectedEndpoint struct { - queue *waiter.Queue - path string - // ref keeps track of references to a connectedEndpoint. ref refs.AtomicRefCount + queue *waiter.Queue + path string + // If srfd >= 0, it is the host FD that file was imported from. srfd int `state:"wait"` @@ -118,7 +118,7 @@ func (c *ConnectedEndpoint) init() *syserr.Error { // The caller is responsible for calling Init(). Additionaly, Release needs to // be called twice because ConnectedEndpoint is both a transport.Receiver and // transport.ConnectedEndpoint. -func NewConnectedEndpoint(file *fd.FD, queue *waiter.Queue, path string) (*ConnectedEndpoint, *syserr.Error) { +func NewConnectedEndpoint(ctx context.Context, file *fd.FD, queue *waiter.Queue, path string) (*ConnectedEndpoint, *syserr.Error) { e := ConnectedEndpoint{ path: path, queue: queue, @@ -133,6 +133,8 @@ func NewConnectedEndpoint(file *fd.FD, queue *waiter.Queue, path string) (*Conne // AtomicRefCounters start off with a single reference. We need two. e.ref.IncRef() + e.ref.EnableLeakCheck("host.ConnectedEndpoint") + return &e, nil } @@ -151,7 +153,7 @@ func (c *ConnectedEndpoint) Init() { func NewSocketWithDirent(ctx context.Context, d *fs.Dirent, f *fd.FD, flags fs.FileFlags) (*fs.File, error) { f2 := fd.New(f.FD()) var q waiter.Queue - e, err := NewConnectedEndpoint(f2, &q, "" /* path */) + e, err := NewConnectedEndpoint(ctx, f2, &q, "" /* path */) if err != nil { f2.Release() return nil, err.ToError() @@ -162,7 +164,7 @@ func NewSocketWithDirent(ctx context.Context, d *fs.Dirent, f *fd.FD, flags fs.F e.Init() - ep := transport.NewExternal(e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e) + ep := transport.NewExternal(ctx, e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e) return unixsocket.NewWithDirent(ctx, d, ep, e.stype, flags), nil } @@ -181,7 +183,7 @@ func newSocket(ctx context.Context, orgfd int, saveable bool) (*fs.File, error) } f := fd.New(ownedfd) var q waiter.Queue - e, err := NewConnectedEndpoint(f, &q, "" /* path */) + e, err := NewConnectedEndpoint(ctx, f, &q, "" /* path */) if err != nil { if saveable { f.Close() @@ -194,7 +196,7 @@ func newSocket(ctx context.Context, orgfd int, saveable bool) (*fs.File, error) e.srfd = srfd e.Init() - ep := transport.NewExternal(e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e) + ep := transport.NewExternal(ctx, e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e) return unixsocket.New(ctx, ep, e.stype), nil } diff --git a/pkg/sentry/fs/host/socket_iovec.go b/pkg/sentry/fs/host/socket_iovec.go index 5efbb3ae8..05d7c79ad 100644 --- a/pkg/sentry/fs/host/socket_iovec.go +++ b/pkg/sentry/fs/host/socket_iovec.go @@ -17,8 +17,8 @@ package host import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/syserror" ) // maxIovs is the maximum number of iovecs to pass to the host. diff --git a/pkg/sentry/fs/host/socket_state.go b/pkg/sentry/fs/host/socket_state.go index 5676c451a..498018f0a 100644 --- a/pkg/sentry/fs/host/socket_state.go +++ b/pkg/sentry/fs/host/socket_state.go @@ -18,7 +18,7 @@ import ( "fmt" "syscall" - "gvisor.googlesource.com/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/fd" ) // beforeSave is invoked by stateify. diff --git a/pkg/sentry/fs/host/socket_test.go b/pkg/sentry/fs/host/socket_test.go index bc3ce5627..68b38fd1c 100644 --- a/pkg/sentry/fs/host/socket_test.go +++ b/pkg/sentry/fs/host/socket_test.go @@ -19,16 +19,16 @@ import ( "syscall" "testing" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/fdnotifier" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/waiter" ) var ( diff --git a/pkg/sentry/fs/host/tty.go b/pkg/sentry/fs/host/tty.go index e45b339f5..2526412a4 100644 --- a/pkg/sentry/fs/host/tty.go +++ b/pkg/sentry/fs/host/tty.go @@ -17,14 +17,14 @@ package host import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/unimpl" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/unimpl" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // TTYFileOperations implements fs.FileOperations for a host file descriptor @@ -114,7 +114,7 @@ func (t *TTYFileOperations) Release() { } // Ioctl implements fs.FileOperations.Ioctl. -func (t *TTYFileOperations) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (t *TTYFileOperations) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { // Ignore arg[0]. This is the real FD: fd := t.fileOperations.iops.fileState.FD() ioctl := args[1].Uint64() diff --git a/pkg/sentry/fs/host/util.go b/pkg/sentry/fs/host/util.go index 94ff7708e..bad61a9a1 100644 --- a/pkg/sentry/fs/host/util.go +++ b/pkg/sentry/fs/host/util.go @@ -19,13 +19,13 @@ import ( "path" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/syserror" ) func open(parent *inodeOperations, name string) (int, error) { diff --git a/pkg/sentry/fs/host/util_unsafe.go b/pkg/sentry/fs/host/util_unsafe.go index b95a57c3f..2b76f1065 100644 --- a/pkg/sentry/fs/host/util_unsafe.go +++ b/pkg/sentry/fs/host/util_unsafe.go @@ -18,9 +18,9 @@ import ( "syscall" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/fs" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" ) // NulByte is a single NUL byte. It is passed to readlinkat as an empty string. diff --git a/pkg/sentry/fs/host/wait_test.go b/pkg/sentry/fs/host/wait_test.go index afcb74724..88d24d693 100644 --- a/pkg/sentry/fs/host/wait_test.go +++ b/pkg/sentry/fs/host/wait_test.go @@ -19,9 +19,9 @@ import ( "testing" "time" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/waiter" ) func TestWait(t *testing.T) { diff --git a/pkg/sentry/fs/inode.go b/pkg/sentry/fs/inode.go index 0b54c2e77..f4ddfa406 100644 --- a/pkg/sentry/fs/inode.go +++ b/pkg/sentry/fs/inode.go @@ -15,16 +15,18 @@ package fs import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/lock" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "sync" + + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs/lock" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/syserror" ) var opens = metric.MustCreateNewUint64Metric("/fs/opens", false /* sync */, "Number of file opens.") @@ -55,6 +57,12 @@ type Inode struct { // overlay is the overlay entry for this Inode. overlay *overlayEntry + + // appendMu is used to synchronize write operations into files which + // have been opened with O_APPEND. Operations which change a file size + // have to take this lock for read. Write operations to files with + // O_APPEND have to take this lock for write. + appendMu sync.RWMutex `state:"nosave"` } // LockCtx is an Inode's lock context and contains different personalities of locks; both @@ -76,14 +84,16 @@ type LockCtx struct { // NewInode constructs an Inode from InodeOperations, a MountSource, and stable attributes. // // NewInode takes a reference on msrc. -func NewInode(iops InodeOperations, msrc *MountSource, sattr StableAttr) *Inode { +func NewInode(ctx context.Context, iops InodeOperations, msrc *MountSource, sattr StableAttr) *Inode { msrc.IncRef() - return &Inode{ + i := Inode{ InodeOperations: iops, StableAttr: sattr, Watches: newWatches(), MountSource: msrc, } + i.EnableLeakCheck("fs.Inode") + return &i } // DecRef drops a reference on the Inode. @@ -337,6 +347,8 @@ func (i *Inode) Truncate(ctx context.Context, d *Dirent, size int64) error { if i.overlay != nil { return overlayTruncate(ctx, i.overlay, d, size) } + i.appendMu.RLock() + defer i.appendMu.RUnlock() return i.InodeOperations.Truncate(ctx, i, size) } @@ -438,3 +450,12 @@ func (i *Inode) CheckCapability(ctx context.Context, cp linux.Capability) bool { } return creds.HasCapability(cp) } + +func (i *Inode) lockAppendMu(appendMode bool) func() { + if appendMode { + i.appendMu.Lock() + return i.appendMu.Unlock + } + i.appendMu.RLock() + return i.appendMu.RUnlock +} diff --git a/pkg/sentry/fs/inode_operations.go b/pkg/sentry/fs/inode_operations.go index ea089dfae..5cde9d215 100644 --- a/pkg/sentry/fs/inode_operations.go +++ b/pkg/sentry/fs/inode_operations.go @@ -17,10 +17,10 @@ package fs import ( "errors" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/context" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" ) var ( diff --git a/pkg/sentry/fs/inode_overlay.go b/pkg/sentry/fs/inode_overlay.go index 06506fb20..e0602da17 100644 --- a/pkg/sentry/fs/inode_overlay.go +++ b/pkg/sentry/fs/inode_overlay.go @@ -17,11 +17,11 @@ package fs import ( "strings" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/syserror" ) func overlayHasWhiteout(parent *Inode, name string) bool { @@ -111,7 +111,7 @@ func overlayLookup(ctx context.Context, parent *overlayEntry, inode *Inode, name parent.copyMu.RUnlock() return nil, false, err } - d, err := NewDirent(newOverlayInode(ctx, entry, inode.MountSource), name), nil + d, err := NewDirent(ctx, newOverlayInode(ctx, entry, inode.MountSource), name), nil parent.copyMu.RUnlock() return d, true, err } @@ -201,7 +201,7 @@ func overlayLookup(ctx context.Context, parent *overlayEntry, inode *Inode, name parent.copyMu.RUnlock() return nil, false, err } - d, err := NewDirent(newOverlayInode(ctx, entry, inode.MountSource), name), nil + d, err := NewDirent(ctx, newOverlayInode(ctx, entry, inode.MountSource), name), nil parent.copyMu.RUnlock() return d, upperInode != nil, err } @@ -217,6 +217,9 @@ func overlayCreate(ctx context.Context, o *overlayEntry, parent *Dirent, name st return nil, err } + // We've added to the directory so we must drop the cache. + o.markDirectoryDirty() + // Take another reference on the upper file's inode, which will be // owned by the overlay entry. upperFile.Dirent.Inode.IncRef() @@ -245,7 +248,7 @@ func overlayCreate(ctx context.Context, o *overlayEntry, parent *Dirent, name st // overlay file. overlayInode := newOverlayInode(ctx, entry, parent.Inode.MountSource) // d will own the inode reference. - overlayDirent := NewDirent(overlayInode, name) + overlayDirent := NewDirent(ctx, overlayInode, name) // The overlay file created below with NewFile will take a reference on // the overlayDirent, and it should be the only thing holding a // reference at the time of creation, so we must drop this reference. @@ -265,7 +268,12 @@ func overlayCreateDirectory(ctx context.Context, o *overlayEntry, parent *Dirent if err := copyUpLockedForRename(ctx, parent); err != nil { return err } - return o.upper.InodeOperations.CreateDirectory(ctx, o.upper, name, perm) + if err := o.upper.InodeOperations.CreateDirectory(ctx, o.upper, name, perm); err != nil { + return err + } + // We've added to the directory so we must drop the cache. + o.markDirectoryDirty() + return nil } func overlayCreateLink(ctx context.Context, o *overlayEntry, parent *Dirent, oldname string, newname string) error { @@ -273,7 +281,12 @@ func overlayCreateLink(ctx context.Context, o *overlayEntry, parent *Dirent, old if err := copyUpLockedForRename(ctx, parent); err != nil { return err } - return o.upper.InodeOperations.CreateLink(ctx, o.upper, oldname, newname) + if err := o.upper.InodeOperations.CreateLink(ctx, o.upper, oldname, newname); err != nil { + return err + } + // We've added to the directory so we must drop the cache. + o.markDirectoryDirty() + return nil } func overlayCreateHardLink(ctx context.Context, o *overlayEntry, parent *Dirent, target *Dirent, name string) error { @@ -285,7 +298,12 @@ func overlayCreateHardLink(ctx context.Context, o *overlayEntry, parent *Dirent, if err := copyUpLockedForRename(ctx, target); err != nil { return err } - return o.upper.InodeOperations.CreateHardLink(ctx, o.upper, target.Inode.overlay.upper, name) + if err := o.upper.InodeOperations.CreateHardLink(ctx, o.upper, target.Inode.overlay.upper, name); err != nil { + return err + } + // We've added to the directory so we must drop the cache. + o.markDirectoryDirty() + return nil } func overlayCreateFifo(ctx context.Context, o *overlayEntry, parent *Dirent, name string, perm FilePermissions) error { @@ -293,7 +311,12 @@ func overlayCreateFifo(ctx context.Context, o *overlayEntry, parent *Dirent, nam if err := copyUpLockedForRename(ctx, parent); err != nil { return err } - return o.upper.InodeOperations.CreateFifo(ctx, o.upper, name, perm) + if err := o.upper.InodeOperations.CreateFifo(ctx, o.upper, name, perm); err != nil { + return err + } + // We've added to the directory so we must drop the cache. + o.markDirectoryDirty() + return nil } func overlayRemove(ctx context.Context, o *overlayEntry, parent *Dirent, child *Dirent) error { @@ -316,8 +339,12 @@ func overlayRemove(ctx context.Context, o *overlayEntry, parent *Dirent, child * } } if child.Inode.overlay.lowerExists { - return overlayCreateWhiteout(o.upper, child.name) + if err := overlayCreateWhiteout(o.upper, child.name); err != nil { + return err + } } + // We've removed from the directory so we must drop the cache. + o.markDirectoryDirty() return nil } @@ -393,8 +420,12 @@ func overlayRename(ctx context.Context, o *overlayEntry, oldParent *Dirent, rena return err } if renamed.Inode.overlay.lowerExists { - return overlayCreateWhiteout(oldParent.Inode.overlay.upper, oldName) + if err := overlayCreateWhiteout(oldParent.Inode.overlay.upper, oldName); err != nil { + return err + } } + // We've changed the directory so we must drop the cache. + oldParent.Inode.overlay.markDirectoryDirty() return nil } @@ -411,6 +442,9 @@ func overlayBind(ctx context.Context, o *overlayEntry, parent *Dirent, name stri return nil, err } + // We've added to the directory so we must drop the cache. + o.markDirectoryDirty() + // Grab the inode and drop the dirent, we don't need it. inode := d.Inode inode.IncRef() @@ -422,7 +456,7 @@ func overlayBind(ctx context.Context, o *overlayEntry, parent *Dirent, name stri inode.DecRef() return nil, err } - return NewDirent(newOverlayInode(ctx, entry, inode.MountSource), name), nil + return NewDirent(ctx, newOverlayInode(ctx, entry, inode.MountSource), name), nil } func overlayBoundEndpoint(o *overlayEntry, path string) transport.BoundEndpoint { @@ -648,13 +682,13 @@ func NewTestOverlayDir(ctx context.Context, upper, lower *Inode, revalidate bool fs := &overlayFilesystem{} var upperMsrc *MountSource if revalidate { - upperMsrc = NewRevalidatingMountSource(fs, MountSourceFlags{}) + upperMsrc = NewRevalidatingMountSource(ctx, fs, MountSourceFlags{}) } else { - upperMsrc = NewNonCachingMountSource(fs, MountSourceFlags{}) + upperMsrc = NewNonCachingMountSource(ctx, fs, MountSourceFlags{}) } - msrc := NewMountSource(&overlayMountSourceOperations{ + msrc := NewMountSource(ctx, &overlayMountSourceOperations{ upper: upperMsrc, - lower: NewNonCachingMountSource(fs, MountSourceFlags{}), + lower: NewNonCachingMountSource(ctx, fs, MountSourceFlags{}), }, fs, MountSourceFlags{}) overlay := &overlayEntry{ upper: upper, diff --git a/pkg/sentry/fs/inode_overlay_test.go b/pkg/sentry/fs/inode_overlay_test.go index 52ce1d29e..8935aad65 100644 --- a/pkg/sentry/fs/inode_overlay_test.go +++ b/pkg/sentry/fs/inode_overlay_test.go @@ -17,12 +17,12 @@ package fs_test import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/contexttest" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/kernel/contexttest" + "gvisor.dev/gvisor/pkg/syserror" ) func TestLookup(t *testing.T) { @@ -275,12 +275,12 @@ func TestLookupRevalidation(t *testing.T) { }, } { t.Run(tc.desc, func(t *testing.T) { - root := fs.NewDirent(newTestRamfsDir(ctx, nil, nil), "root") + root := fs.NewDirent(ctx, newTestRamfsDir(ctx, nil, nil), "root") ctx = &rootContext{ Context: ctx, root: root, } - overlay := fs.NewDirent(fs.NewTestOverlayDir(ctx, tc.upper, tc.lower, tc.revalidate), "overlay") + overlay := fs.NewDirent(ctx, fs.NewTestOverlayDir(ctx, tc.upper, tc.lower, tc.revalidate), "overlay") // Lookup the file twice through the overlay. first, err := overlay.Walk(ctx, root, fileName) if err != nil { @@ -442,7 +442,7 @@ func (f *dirFile) Readdir(ctx context.Context, file *fs.File, ser fs.DentrySeria } func newTestRamfsInode(ctx context.Context, msrc *fs.MountSource) *fs.Inode { - inode := fs.NewInode(&inode{ + inode := fs.NewInode(ctx, &inode{ InodeStaticFileGetter: fsutil.InodeStaticFileGetter{ Contents: []byte("foobar"), }, @@ -451,7 +451,7 @@ func newTestRamfsInode(ctx context.Context, msrc *fs.MountSource) *fs.Inode { } func newTestRamfsDir(ctx context.Context, contains []dirContent, negative []string) *fs.Inode { - msrc := fs.NewPseudoMountSource() + msrc := fs.NewPseudoMountSource(ctx) contents := make(map[string]*fs.Inode) for _, c := range contains { if c.dir { @@ -463,7 +463,7 @@ func newTestRamfsDir(ctx context.Context, contains []dirContent, negative []stri dops := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermissions{ User: fs.PermMask{Read: true, Execute: true}, }) - return fs.NewInode(&dir{ + return fs.NewInode(ctx, &dir{ InodeOperations: dops, negative: negative, }, msrc, fs.StableAttr{Type: fs.Directory}) diff --git a/pkg/sentry/fs/inotify.go b/pkg/sentry/fs/inotify.go index 7dfd31020..c7f4e2d13 100644 --- a/pkg/sentry/fs/inotify.go +++ b/pkg/sentry/fs/inotify.go @@ -18,14 +18,14 @@ import ( "sync" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/uniqueid" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/uniqueid" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // Inotify represents an inotify instance created by inotify_init(2) or @@ -202,7 +202,7 @@ func (i *Inotify) UnstableAttr(ctx context.Context, file *File) (UnstableAttr, e } // Ioctl implements fs.FileOperations.Ioctl. -func (i *Inotify) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (i *Inotify) Ioctl(ctx context.Context, _ *File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { switch args[1].Int() { case linux.FIONREAD: i.evMu.Lock() diff --git a/pkg/sentry/fs/inotify_event.go b/pkg/sentry/fs/inotify_event.go index d52f956e4..9f70a3e82 100644 --- a/pkg/sentry/fs/inotify_event.go +++ b/pkg/sentry/fs/inotify_event.go @@ -18,8 +18,8 @@ import ( "bytes" "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // inotifyEventBaseSize is the base size of linux's struct inotify_event. This diff --git a/pkg/sentry/fs/inotify_watch.go b/pkg/sentry/fs/inotify_watch.go index a0b488467..0aa0a5e9b 100644 --- a/pkg/sentry/fs/inotify_watch.go +++ b/pkg/sentry/fs/inotify_watch.go @@ -18,7 +18,7 @@ import ( "sync" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) // Watch represent a particular inotify watch created by inotify_add_watch. diff --git a/pkg/sentry/fs/lock/BUILD b/pkg/sentry/fs/lock/BUILD index 7164744b8..08d7c0c57 100644 --- a/pkg/sentry/fs/lock/BUILD +++ b/pkg/sentry/fs/lock/BUILD @@ -39,7 +39,7 @@ go_library( "lock_set.go", "lock_set_functions.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/lock", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/lock", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/log", diff --git a/pkg/sentry/fs/lock/lock.go b/pkg/sentry/fs/lock/lock.go index f2aee4512..636484424 100644 --- a/pkg/sentry/fs/lock/lock.go +++ b/pkg/sentry/fs/lock/lock.go @@ -55,7 +55,7 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/waiter" ) // LockType is a type of regional file lock. @@ -134,7 +134,7 @@ const ( // LockRegion attempts to acquire a typed lock for the uid on a region // of a file. Returns true if successful in locking the region. If false // is returned, the caller should normally interpret this as "try again later" if -// accquiring the lock in a non-blocking mode or "interrupted" if in a blocking mode. +// acquiring the lock in a non-blocking mode or "interrupted" if in a blocking mode. // Blocker is the interface used to provide blocking behavior, passing a nil Blocker // will result in non-blocking behavior. func (l *Locks) LockRegion(uid UniqueID, t LockType, r LockRange, block Blocker) bool { diff --git a/pkg/sentry/fs/mock.go b/pkg/sentry/fs/mock.go index ff04e9b22..7a24c6f1b 100644 --- a/pkg/sentry/fs/mock.go +++ b/pkg/sentry/fs/mock.go @@ -15,8 +15,8 @@ package fs import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/syserror" ) // MockInodeOperations implements InodeOperations for testing Inodes. @@ -34,7 +34,7 @@ type MockInodeOperations struct { // NewMockInode returns a mock *Inode using MockInodeOperations. func NewMockInode(ctx context.Context, msrc *MountSource, sattr StableAttr) *Inode { - return NewInode(NewMockInodeOperations(ctx), msrc, sattr) + return NewInode(ctx, NewMockInodeOperations(ctx), msrc, sattr) } // NewMockInodeOperations returns a *MockInodeOperations. @@ -75,6 +75,12 @@ func (n *MockMountSourceOps) Keep(dirent *Dirent) bool { return n.keep } +// CacheReaddir implements fs.MountSourceOperations.CacheReaddir. +func (n *MockMountSourceOps) CacheReaddir() bool { + // Common case: cache readdir results if there is a dirent cache. + return n.keep +} + // WriteOut implements fs.InodeOperations.WriteOut. func (n *MockInodeOperations) WriteOut(context.Context, *Inode) error { return nil @@ -93,7 +99,7 @@ func (n *MockInodeOperations) IsVirtual() bool { // Lookup implements fs.InodeOperations.Lookup. func (n *MockInodeOperations) Lookup(ctx context.Context, dir *Inode, p string) (*Dirent, error) { n.walkCalled = true - return NewDirent(NewInode(&MockInodeOperations{}, dir.MountSource, StableAttr{}), p), nil + return NewDirent(ctx, NewInode(ctx, &MockInodeOperations{}, dir.MountSource, StableAttr{}), p), nil } // SetPermissions implements fs.InodeOperations.SetPermissions. @@ -114,7 +120,7 @@ func (n *MockInodeOperations) SetTimestamps(context.Context, *Inode, TimeSpec) e // Create implements fs.InodeOperations.Create. func (n *MockInodeOperations) Create(ctx context.Context, dir *Inode, p string, flags FileFlags, perms FilePermissions) (*File, error) { n.createCalled = true - d := NewDirent(NewInode(&MockInodeOperations{}, dir.MountSource, StableAttr{}), p) + d := NewDirent(ctx, NewInode(ctx, &MockInodeOperations{}, dir.MountSource, StableAttr{}), p) return &File{Dirent: d}, nil } diff --git a/pkg/sentry/fs/mount.go b/pkg/sentry/fs/mount.go index 41e0d285b..7a9692800 100644 --- a/pkg/sentry/fs/mount.go +++ b/pkg/sentry/fs/mount.go @@ -19,12 +19,12 @@ import ( "fmt" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" ) -// DirentOperations provide file systems greater control over how long a Dirent stays pinned -// in core. Implementations must not take Dirent.mu. +// DirentOperations provide file systems greater control over how long a Dirent +// stays pinned in core. Implementations must not take Dirent.mu. type DirentOperations interface { // Revalidate is called during lookup each time we encounter a Dirent // in the cache. Implementations may update stale properties of the @@ -37,6 +37,12 @@ type DirentOperations interface { // Keep returns true if the Dirent should be kept in memory for as long // as possible beyond any active references. Keep(dirent *Dirent) bool + + // CacheReaddir returns true if directory entries returned by + // FileOperations.Readdir may be cached for future use. + // + // Postconditions: This method must always return the same value. + CacheReaddir() bool } // MountSourceOperations contains filesystem specific operations. @@ -127,17 +133,19 @@ const DefaultDirentCacheSize uint64 = 1000 // NewMountSource returns a new MountSource. Filesystem may be nil if there is no // filesystem backing the mount. -func NewMountSource(mops MountSourceOperations, filesystem Filesystem, flags MountSourceFlags) *MountSource { +func NewMountSource(ctx context.Context, mops MountSourceOperations, filesystem Filesystem, flags MountSourceFlags) *MountSource { fsType := "none" if filesystem != nil { fsType = filesystem.Name() } - return &MountSource{ + msrc := MountSource{ MountSourceOperations: mops, Flags: flags, FilesystemType: fsType, fscache: NewDirentCache(DefaultDirentCacheSize), } + msrc.EnableLeakCheck("fs.MountSource") + return &msrc } // DirentRefs returns the current mount direntRefs. @@ -188,36 +196,40 @@ func (msrc *MountSource) SetDirentCacheLimiter(l *DirentCacheLimiter) { // NewCachingMountSource returns a generic mount that will cache dirents // aggressively. -func NewCachingMountSource(filesystem Filesystem, flags MountSourceFlags) *MountSource { - return NewMountSource(&SimpleMountSourceOperations{ - keep: true, - revalidate: false, +func NewCachingMountSource(ctx context.Context, filesystem Filesystem, flags MountSourceFlags) *MountSource { + return NewMountSource(ctx, &SimpleMountSourceOperations{ + keep: true, + revalidate: false, + cacheReaddir: true, }, filesystem, flags) } // NewNonCachingMountSource returns a generic mount that will never cache dirents. -func NewNonCachingMountSource(filesystem Filesystem, flags MountSourceFlags) *MountSource { - return NewMountSource(&SimpleMountSourceOperations{ - keep: false, - revalidate: false, +func NewNonCachingMountSource(ctx context.Context, filesystem Filesystem, flags MountSourceFlags) *MountSource { + return NewMountSource(ctx, &SimpleMountSourceOperations{ + keep: false, + revalidate: false, + cacheReaddir: false, }, filesystem, flags) } // NewRevalidatingMountSource returns a generic mount that will cache dirents, -// but will revalidate them on each lookup. -func NewRevalidatingMountSource(filesystem Filesystem, flags MountSourceFlags) *MountSource { - return NewMountSource(&SimpleMountSourceOperations{ - keep: true, - revalidate: true, +// but will revalidate them on each lookup and always perform uncached readdir. +func NewRevalidatingMountSource(ctx context.Context, filesystem Filesystem, flags MountSourceFlags) *MountSource { + return NewMountSource(ctx, &SimpleMountSourceOperations{ + keep: true, + revalidate: true, + cacheReaddir: false, }, filesystem, flags) } // NewPseudoMountSource returns a "pseudo" mount source that is not backed by // an actual filesystem. It is always non-caching. -func NewPseudoMountSource() *MountSource { - return NewMountSource(&SimpleMountSourceOperations{ - keep: false, - revalidate: false, +func NewPseudoMountSource(ctx context.Context) *MountSource { + return NewMountSource(ctx, &SimpleMountSourceOperations{ + keep: false, + revalidate: false, + cacheReaddir: false, }, nil, MountSourceFlags{}) } @@ -225,8 +237,9 @@ func NewPseudoMountSource() *MountSource { // // +stateify savable type SimpleMountSourceOperations struct { - keep bool - revalidate bool + keep bool + revalidate bool + cacheReaddir bool } // Revalidate implements MountSourceOperations.Revalidate. @@ -239,6 +252,11 @@ func (smo *SimpleMountSourceOperations) Keep(*Dirent) bool { return smo.keep } +// CacheReaddir implements MountSourceOperations.CacheReaddir. +func (smo *SimpleMountSourceOperations) CacheReaddir() bool { + return smo.cacheReaddir +} + // ResetInodeMappings implements MountSourceOperations.ResetInodeMappings. func (*SimpleMountSourceOperations) ResetInodeMappings() {} diff --git a/pkg/sentry/fs/mount_overlay.go b/pkg/sentry/fs/mount_overlay.go index 535f812c8..4fcdd6c01 100644 --- a/pkg/sentry/fs/mount_overlay.go +++ b/pkg/sentry/fs/mount_overlay.go @@ -15,7 +15,7 @@ package fs import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) // overlayMountSourceOperations implements MountSourceOperations for an overlay @@ -28,10 +28,10 @@ type overlayMountSourceOperations struct { lower *MountSource } -func newOverlayMountSource(upper, lower *MountSource, flags MountSourceFlags) *MountSource { +func newOverlayMountSource(ctx context.Context, upper, lower *MountSource, flags MountSourceFlags) *MountSource { upper.IncRef() lower.IncRef() - msrc := NewMountSource(&overlayMountSourceOperations{ + msrc := NewMountSource(ctx, &overlayMountSourceOperations{ upper: upper, lower: lower, }, &overlayFilesystem{}, flags) @@ -81,6 +81,17 @@ func (o *overlayMountSourceOperations) Keep(dirent *Dirent) bool { return o.upper.Keep(dirent) } +// CacheReaddir implements MountSourceOperations.CacheReaddir for an overlay by +// performing the logical AND of the upper and lower filesystems' CacheReaddir +// methods. +// +// N.B. This is fs-global instead of inode-specific because it must always +// return the same value. If it was inode-specific, we couldn't guarantee that +// property across copy up. +func (o *overlayMountSourceOperations) CacheReaddir() bool { + return o.lower.CacheReaddir() && o.upper.CacheReaddir() +} + // ResetInodeMappings propagates the call to both upper and lower MountSource. func (o *overlayMountSourceOperations) ResetInodeMappings() { o.upper.ResetInodeMappings() diff --git a/pkg/sentry/fs/mount_test.go b/pkg/sentry/fs/mount_test.go index 2e2716643..0b84732aa 100644 --- a/pkg/sentry/fs/mount_test.go +++ b/pkg/sentry/fs/mount_test.go @@ -18,7 +18,7 @@ import ( "fmt" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" ) // cacheReallyContains iterates through the dirent cache to determine whether diff --git a/pkg/sentry/fs/mounts.go b/pkg/sentry/fs/mounts.go index a5c52d7ba..693ffc760 100644 --- a/pkg/sentry/fs/mounts.go +++ b/pkg/sentry/fs/mounts.go @@ -22,12 +22,12 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/syserror" ) // DefaultTraversalLimit provides a sensible default traversal limit that may @@ -124,7 +124,16 @@ func (m *Mount) IsUndo() bool { return false } -// MountNamespace defines a collection of mounts. +// MountNamespace defines a VFS root. It contains collection of Mounts that are +// mounted inside the Dirent tree rooted at the Root Dirent. It provides +// methods for traversing the Dirent, and for mounting/unmounting in the tree. +// +// Note that this does not correspond to a "mount namespace" in the Linux. It +// is more like a unique VFS instance. +// +// It's possible for different processes to have different MountNamespaces. In +// this case, the file systems exposed to the processes are completely +// distinct. // // +stateify savable type MountNamespace struct { @@ -166,18 +175,20 @@ func NewMountNamespace(ctx context.Context, root *Inode) (*MountNamespace, error // Set the root dirent and id on the root mount. The reference returned from // NewDirent will be donated to the MountNamespace constructed below. - d := NewDirent(root, "/") + d := NewDirent(ctx, root, "/") mnts := map[*Dirent]*Mount{ d: newRootMount(1, d), } - return &MountNamespace{ + mns := MountNamespace{ userns: creds.UserNamespace, root: d, mounts: mnts, mountID: 2, - }, nil + } + mns.EnableLeakCheck("fs.MountNamespace") + return &mns, nil } // UserNamespace returns the user namespace associated with this mount manager. @@ -652,6 +663,11 @@ func (mns *MountNamespace) ResolveExecutablePath(ctx context.Context, wd, name s } defer d.DecRef() + // Check that it is a regular file. + if !IsRegular(d.Inode.StableAttr) { + continue + } + // Check whether we can read and execute the found file. if err := d.Inode.CheckPermission(ctx, PermMask{Read: true, Execute: true}); err != nil { log.Infof("Found executable at %q, but user cannot execute it: %v", binPath, err) diff --git a/pkg/sentry/fs/mounts_test.go b/pkg/sentry/fs/mounts_test.go index 56d726dd1..c4c771f2c 100644 --- a/pkg/sentry/fs/mounts_test.go +++ b/pkg/sentry/fs/mounts_test.go @@ -17,11 +17,11 @@ package fs_test import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/contexttest" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/kernel/contexttest" ) // Creates a new MountNamespace with filesystem: @@ -30,17 +30,17 @@ import ( // |-bar (file) func createMountNamespace(ctx context.Context) (*fs.MountNamespace, error) { perms := fs.FilePermsFromMode(0777) - m := fs.NewPseudoMountSource() + m := fs.NewPseudoMountSource(ctx) barFile := fsutil.NewSimpleFileInode(ctx, fs.RootOwner, perms, 0) fooDir := ramfs.NewDir(ctx, map[string]*fs.Inode{ - "bar": fs.NewInode(barFile, m, fs.StableAttr{Type: fs.RegularFile}), + "bar": fs.NewInode(ctx, barFile, m, fs.StableAttr{Type: fs.RegularFile}), }, fs.RootOwner, perms) rootDir := ramfs.NewDir(ctx, map[string]*fs.Inode{ - "foo": fs.NewInode(fooDir, m, fs.StableAttr{Type: fs.Directory}), + "foo": fs.NewInode(ctx, fooDir, m, fs.StableAttr{Type: fs.Directory}), }, fs.RootOwner, perms) - return fs.NewMountNamespace(ctx, fs.NewInode(rootDir, m, fs.StableAttr{Type: fs.Directory})) + return fs.NewMountNamespace(ctx, fs.NewInode(ctx, rootDir, m, fs.StableAttr{Type: fs.Directory})) } func TestFindLink(t *testing.T) { diff --git a/pkg/sentry/fs/offset.go b/pkg/sentry/fs/offset.go index 3f68da149..f7d844ce7 100644 --- a/pkg/sentry/fs/offset.go +++ b/pkg/sentry/fs/offset.go @@ -17,7 +17,7 @@ package fs import ( "math" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // OffsetPageEnd returns the file offset rounded up to the nearest diff --git a/pkg/sentry/fs/overlay.go b/pkg/sentry/fs/overlay.go index db89a5f70..1d3ff39e0 100644 --- a/pkg/sentry/fs/overlay.go +++ b/pkg/sentry/fs/overlay.go @@ -19,11 +19,12 @@ import ( "strings" "sync" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/third_party/gvsync" ) // The virtual filesystem implements an overlay configuration. For a high-level @@ -104,7 +105,7 @@ func NewOverlayRoot(ctx context.Context, upper *Inode, lower *Inode, flags Mount return nil, fmt.Errorf("cannot nest overlay in upper file of another overlay") } - msrc := newOverlayMountSource(upper.MountSource, lower.MountSource, flags) + msrc := newOverlayMountSource(ctx, upper.MountSource, lower.MountSource, flags) overlay, err := newOverlayEntry(ctx, upper, lower, true) if err != nil { msrc.DecRef() @@ -127,7 +128,7 @@ func NewOverlayRootFile(ctx context.Context, upperMS *MountSource, lower *Inode, if !IsRegular(lower.StableAttr) { return nil, fmt.Errorf("lower Inode is not a regular file") } - msrc := newOverlayMountSource(upperMS, lower.MountSource, flags) + msrc := newOverlayMountSource(ctx, upperMS, lower.MountSource, flags) overlay, err := newOverlayEntry(ctx, nil, lower, true) if err != nil { msrc.DecRef() @@ -140,9 +141,9 @@ func NewOverlayRootFile(ctx context.Context, upperMS *MountSource, lower *Inode, func newOverlayInode(ctx context.Context, o *overlayEntry, msrc *MountSource) *Inode { var inode *Inode if o.upper != nil { - inode = NewInode(nil, msrc, o.upper.StableAttr) + inode = NewInode(ctx, nil, msrc, o.upper.StableAttr) } else { - inode = NewInode(nil, msrc, o.lower.StableAttr) + inode = NewInode(ctx, nil, msrc, o.lower.StableAttr) } inode.overlay = o return inode @@ -196,6 +197,12 @@ type overlayEntry struct { // these locks is sufficient to read upper; holding all three for writing // is required to mutate it. upper *Inode + + // dirCacheMu protects dirCache. + dirCacheMu gvsync.DowngradableRWMutex `state:"nosave"` + + // dirCache is cache of DentAttrs from upper and lower Inodes. + dirCache *SortedDentryMap } // newOverlayEntry returns a new overlayEntry. @@ -258,6 +265,17 @@ func (o *overlayEntry) isMappableLocked() bool { return o.inodeLocked().Mappable() != nil } +// markDirectoryDirty marks any cached data dirty for this directory. This is +// necessary in order to ensure that this node does not retain stale state +// throughout its lifetime across multiple open directory handles. +// +// Currently this means invalidating any readdir caches. +func (o *overlayEntry) markDirectoryDirty() { + o.dirCacheMu.Lock() + o.dirCache = nil + o.dirCacheMu.Unlock() +} + // AddMapping implements memmap.Mappable.AddMapping. func (o *overlayEntry) AddMapping(ctx context.Context, ms memmap.MappingSpace, ar usermem.AddrRange, offset uint64, writable bool) error { o.mapsMu.Lock() diff --git a/pkg/sentry/fs/proc/BUILD b/pkg/sentry/fs/proc/BUILD index 1728fe0b5..70ed854a8 100644 --- a/pkg/sentry/fs/proc/BUILD +++ b/pkg/sentry/fs/proc/BUILD @@ -27,10 +27,11 @@ go_library( "uptime.go", "version.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/proc", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", + "//pkg/binary", "//pkg/log", "//pkg/sentry/context", "//pkg/sentry/fs", @@ -41,7 +42,6 @@ go_library( "//pkg/sentry/inet", "//pkg/sentry/kernel", "//pkg/sentry/kernel/auth", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/time", "//pkg/sentry/limits", "//pkg/sentry/mm", diff --git a/pkg/sentry/fs/proc/cgroup.go b/pkg/sentry/fs/proc/cgroup.go index 1019f862a..05e31c55d 100644 --- a/pkg/sentry/fs/proc/cgroup.go +++ b/pkg/sentry/fs/proc/cgroup.go @@ -17,8 +17,8 @@ package proc import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) func newCGroupInode(ctx context.Context, msrc *fs.MountSource, cgroupControllers map[string]string) *fs.Inode { diff --git a/pkg/sentry/fs/proc/cpuinfo.go b/pkg/sentry/fs/proc/cpuinfo.go index 15031234e..3edf36780 100644 --- a/pkg/sentry/fs/proc/cpuinfo.go +++ b/pkg/sentry/fs/proc/cpuinfo.go @@ -15,9 +15,9 @@ package proc import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" ) func newCPUInfo(ctx context.Context, msrc *fs.MountSource) *fs.Inode { diff --git a/pkg/sentry/fs/proc/device/BUILD b/pkg/sentry/fs/proc/device/BUILD index 64b0c5a3a..0394451d4 100644 --- a/pkg/sentry/fs/proc/device/BUILD +++ b/pkg/sentry/fs/proc/device/BUILD @@ -5,7 +5,7 @@ package(licenses = ["notice"]) go_library( name = "device", srcs = ["device.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/device", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/proc/device", visibility = ["//pkg/sentry:internal"], deps = ["//pkg/sentry/device"], ) diff --git a/pkg/sentry/fs/proc/device/device.go b/pkg/sentry/fs/proc/device/device.go index 0de466c73..bbe66e796 100644 --- a/pkg/sentry/fs/proc/device/device.go +++ b/pkg/sentry/fs/proc/device/device.go @@ -16,7 +16,7 @@ package device import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/device" ) // ProcDevice is the kernel proc device. diff --git a/pkg/sentry/fs/proc/exec_args.go b/pkg/sentry/fs/proc/exec_args.go index cb28f6bc3..1d3a2d426 100644 --- a/pkg/sentry/fs/proc/exec_args.go +++ b/pkg/sentry/fs/proc/exec_args.go @@ -19,14 +19,14 @@ import ( "fmt" "io" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // execArgType enumerates the types of exec arguments that are exposed through @@ -64,7 +64,7 @@ func newExecArgInode(t *kernel.Task, msrc *fs.MountSource, arg execArgType) *fs. arg: arg, t: t, } - return newProcInode(f, msrc, fs.SpecialFile, t) + return newProcInode(t, f, msrc, fs.SpecialFile, t) } // GetFile implements fs.InodeOperations.GetFile. diff --git a/pkg/sentry/fs/proc/fds.go b/pkg/sentry/fs/proc/fds.go index 744b31c74..bee421d76 100644 --- a/pkg/sentry/fs/proc/fds.go +++ b/pkg/sentry/fs/proc/fds.go @@ -19,14 +19,13 @@ import ( "sort" "strconv" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/device" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) // walkDescriptors finds the descriptor (file-flag pair) for the fd identified @@ -42,8 +41,8 @@ func walkDescriptors(t *kernel.Task, p string, toInode func(*fs.File, kernel.FDF var file *fs.File var fdFlags kernel.FDFlags t.WithMuLocked(func(t *kernel.Task) { - if fdm := t.FDMap(); fdm != nil { - file, fdFlags = fdm.GetDescriptor(kdefs.FD(n)) + if fdTable := t.FDTable(); fdTable != nil { + file, fdFlags = fdTable.Get(int32(n)) } }) if file == nil { @@ -56,36 +55,31 @@ func walkDescriptors(t *kernel.Task, p string, toInode func(*fs.File, kernel.FDF // toDentAttr callback for each to get a DentAttr, which it then emits. This is // a helper for implementing fs.InodeOperations.Readdir. func readDescriptors(t *kernel.Task, c *fs.DirCtx, offset int64, toDentAttr func(int) fs.DentAttr) (int64, error) { - var fds kernel.FDs + var fds []int32 t.WithMuLocked(func(t *kernel.Task) { - if fdm := t.FDMap(); fdm != nil { - fds = fdm.GetFDs() + if fdTable := t.FDTable(); fdTable != nil { + fds = fdTable.GetFDs() } }) - fdInts := make([]int, 0, len(fds)) - for _, fd := range fds { - fdInts = append(fdInts, int(fd)) - } - - // Find the fd to start at. - idx := sort.SearchInts(fdInts, int(offset)) - if idx == len(fdInts) { + // Find the appropriate starting point. + idx := sort.Search(len(fds), func(i int) bool { return fds[i] >= int32(offset) }) + if idx == len(fds) { return offset, nil } - fdInts = fdInts[idx:] + fds = fds[idx:] - var fd int - for _, fd = range fdInts { + // Serialize all FDs. + for _, fd := range fds { name := strconv.FormatUint(uint64(fd), 10) - if err := c.DirEmit(name, toDentAttr(fd)); err != nil { + if err := c.DirEmit(name, toDentAttr(int(fd))); err != nil { // Returned offset is the next fd to serialize. return int64(fd), err } } // We serialized them all. Next offset should be higher than last // serialized fd. - return int64(fd + 1), nil + return int64(fds[len(fds)-1] + 1), nil } // fd implements fs.InodeOperations for a file in /proc/TID/fd/. @@ -105,7 +99,7 @@ func newFd(t *kernel.Task, f *fs.File, msrc *fs.MountSource) *fs.Inode { Symlink: *ramfs.NewSymlink(t, fs.RootOwner, ""), file: f, } - return newProcInode(fd, msrc, fs.Symlink, t) + return newProcInode(t, fd, msrc, fs.Symlink, t) } // GetFile returns the fs.File backing this fd. The dirent and flags @@ -154,9 +148,9 @@ func (f *fd) Close() error { type fdDir struct { ramfs.Dir - // We hold a reference on the task's fdmap but only keep an indirect - // task pointer to avoid Dirent loading circularity caused by fdmap's - // potential back pointers into the dirent tree. + // We hold a reference on the task's FDTable but only keep an indirect + // task pointer to avoid Dirent loading circularity caused by the + // table's back pointers into the dirent tree. t *kernel.Task } @@ -168,7 +162,7 @@ func newFdDir(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { Dir: *ramfs.NewDir(t, nil, fs.RootOwner, fs.FilePermissions{User: fs.PermMask{Read: true, Execute: true}}), t: t, } - return newProcInode(f, msrc, fs.SpecialDirectory, t) + return newProcInode(t, f, msrc, fs.SpecialDirectory, t) } // Check implements InodeOperations.Check. @@ -198,7 +192,7 @@ func (f *fdDir) Lookup(ctx context.Context, dir *fs.Inode, p string) (*fs.Dirent if err != nil { return nil, err } - return fs.NewDirent(n, p), nil + return fs.NewDirent(ctx, n, p), nil } // GetFile implements fs.FileOperations.GetFile. @@ -252,7 +246,7 @@ func newFdInfoDir(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { Dir: *ramfs.NewDir(t, nil, fs.RootOwner, fs.FilePermsFromMode(0500)), t: t, } - return newProcInode(fdid, msrc, fs.SpecialDirectory, t) + return newProcInode(t, fdid, msrc, fs.SpecialDirectory, t) } // Lookup loads an fd in /proc/TID/fdinfo into a Dirent. @@ -272,7 +266,7 @@ func (fdid *fdInfoDir) Lookup(ctx context.Context, dir *fs.Inode, p string) (*fs if err != nil { return nil, err } - return fs.NewDirent(inode, p), nil + return fs.NewDirent(ctx, inode, p), nil } // GetFile implements fs.FileOperations.GetFile. diff --git a/pkg/sentry/fs/proc/filesystems.go b/pkg/sentry/fs/proc/filesystems.go index 7bb081d0e..e9250c51c 100644 --- a/pkg/sentry/fs/proc/filesystems.go +++ b/pkg/sentry/fs/proc/filesystems.go @@ -18,9 +18,9 @@ import ( "bytes" "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" ) // filesystemsData backs /proc/filesystems. diff --git a/pkg/sentry/fs/proc/fs.go b/pkg/sentry/fs/proc/fs.go index d57d6cc5d..f14833805 100644 --- a/pkg/sentry/fs/proc/fs.go +++ b/pkg/sentry/fs/proc/fs.go @@ -17,8 +17,8 @@ package proc import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // filesystem is a procfs. @@ -30,7 +30,7 @@ func init() { fs.RegisterFilesystem(&filesystem{}) } -// FilesystemName is the name underwhich the filesystem is registered. +// FilesystemName is the name under which the filesystem is registered. // Name matches fs/proc/root.c:proc_fs_type.name. const FilesystemName = "proc" @@ -77,5 +77,5 @@ func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSou // Construct the procfs root. Since procfs files are all virtual, we // never want them cached. - return New(ctx, fs.NewNonCachingMountSource(f, flags), cgroups) + return New(ctx, fs.NewNonCachingMountSource(ctx, f, flags), cgroups) } diff --git a/pkg/sentry/fs/proc/inode.go b/pkg/sentry/fs/proc/inode.go index 986bc0a45..0c04f81fa 100644 --- a/pkg/sentry/fs/proc/inode.go +++ b/pkg/sentry/fs/proc/inode.go @@ -15,15 +15,15 @@ package proc import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/device" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // taskOwnedInodeOps wraps an fs.InodeOperations and overrides the UnstableAttr @@ -115,11 +115,11 @@ func newStaticProcInode(ctx context.Context, msrc *fs.MountSource, contents []by Contents: contents, }, } - return newProcInode(iops, msrc, fs.SpecialFile, nil) + return newProcInode(ctx, iops, msrc, fs.SpecialFile, nil) } // newProcInode creates a new inode from the given inode operations. -func newProcInode(iops fs.InodeOperations, msrc *fs.MountSource, typ fs.InodeType, t *kernel.Task) *fs.Inode { +func newProcInode(ctx context.Context, iops fs.InodeOperations, msrc *fs.MountSource, typ fs.InodeType, t *kernel.Task) *fs.Inode { sattr := fs.StableAttr{ DeviceID: device.ProcDevice.DeviceID(), InodeID: device.ProcDevice.NextIno(), @@ -129,5 +129,5 @@ func newProcInode(iops fs.InodeOperations, msrc *fs.MountSource, typ fs.InodeTyp if t != nil { iops = &taskOwnedInodeOps{iops, t} } - return fs.NewInode(iops, msrc, sattr) + return fs.NewInode(ctx, iops, msrc, sattr) } diff --git a/pkg/sentry/fs/proc/loadavg.go b/pkg/sentry/fs/proc/loadavg.go index 2dfe7089a..8602b7426 100644 --- a/pkg/sentry/fs/proc/loadavg.go +++ b/pkg/sentry/fs/proc/loadavg.go @@ -18,8 +18,8 @@ import ( "bytes" "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" ) // loadavgData backs /proc/loadavg. diff --git a/pkg/sentry/fs/proc/meminfo.go b/pkg/sentry/fs/proc/meminfo.go index d2b9b92c7..495f3e3ba 100644 --- a/pkg/sentry/fs/proc/meminfo.go +++ b/pkg/sentry/fs/proc/meminfo.go @@ -18,11 +18,11 @@ import ( "bytes" "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // meminfoData backs /proc/meminfo. diff --git a/pkg/sentry/fs/proc/mounts.go b/pkg/sentry/fs/proc/mounts.go index 1f7817947..e33c4a460 100644 --- a/pkg/sentry/fs/proc/mounts.go +++ b/pkg/sentry/fs/proc/mounts.go @@ -19,10 +19,10 @@ import ( "fmt" "sort" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/kernel" ) // forEachMountSource runs f for the process root mount and each mount that is a diff --git a/pkg/sentry/fs/proc/net.go b/pkg/sentry/fs/proc/net.go index 034950158..6b839685b 100644 --- a/pkg/sentry/fs/proc/net.go +++ b/pkg/sentry/fs/proc/net.go @@ -19,17 +19,18 @@ import ( "fmt" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/socket/unix" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" ) // newNet creates a new proc net entry. @@ -55,9 +56,8 @@ func (p *proc) newNetDir(ctx context.Context, k *kernel.Kernel, msrc *fs.MountSo "psched": newStaticProcInode(ctx, msrc, []byte(fmt.Sprintf("%08x %08x %08x %08x\n", uint64(time.Microsecond/time.Nanosecond), 64, 1000000, uint64(time.Second/time.Nanosecond)))), "ptype": newStaticProcInode(ctx, msrc, []byte("Type Device Function")), "route": newStaticProcInode(ctx, msrc, []byte("Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT")), - "tcp": newStaticProcInode(ctx, msrc, []byte(" sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode")), - - "udp": newStaticProcInode(ctx, msrc, []byte(" sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode ref pointer drops")), + "tcp": seqfile.NewSeqFileInode(ctx, &netTCP{k: k}, msrc), + "udp": newStaticProcInode(ctx, msrc, []byte(" sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode ref pointer drops")), "unix": seqfile.NewSeqFileInode(ctx, &netUnix{k: k}, msrc), } @@ -70,7 +70,7 @@ func (p *proc) newNetDir(ctx context.Context, k *kernel.Kernel, msrc *fs.MountSo } } d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } // ifinet6 implements seqfile.SeqSource for /proc/net/if_inet6. @@ -155,37 +155,40 @@ func (n *netDev) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ([]se contents[1] = " face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed\n" for _, i := range interfaces { - // TODO(b/71872867): Collect stats from each inet.Stack - // implementation (hostinet, epsocket, and rpcinet). - // Implements the same format as // net/core/net-procfs.c:dev_seq_printf_stats. - l := fmt.Sprintf("%6s: %7d %7d %4d %4d %4d %5d %10d %9d %8d %7d %4d %4d %4d %5d %7d %10d\n", + var stats inet.StatDev + if err := n.s.Statistics(&stats, i.Name); err != nil { + log.Warningf("Failed to retrieve interface statistics for %v: %v", i.Name, err) + continue + } + l := fmt.Sprintf( + "%6s: %7d %7d %4d %4d %4d %5d %10d %9d %8d %7d %4d %4d %4d %5d %7d %10d\n", i.Name, // Received - 0, // bytes - 0, // packets - 0, // errors - 0, // dropped - 0, // fifo - 0, // frame - 0, // compressed - 0, // multicast + stats[0], // bytes + stats[1], // packets + stats[2], // errors + stats[3], // dropped + stats[4], // fifo + stats[5], // frame + stats[6], // compressed + stats[7], // multicast // Transmitted - 0, // bytes - 0, // packets - 0, // errors - 0, // dropped - 0, // fifo - 0, // frame - 0, // compressed - 0) // multicast + stats[8], // bytes + stats[9], // packets + stats[10], // errors + stats[11], // dropped + stats[12], // fifo + stats[13], // frame + stats[14], // compressed + stats[15]) // multicast contents = append(contents, l) } var data []seqfile.SeqData for _, l := range contents { - data = append(data, seqfile.SeqData{Buf: []byte(l), Handle: (*ifinet6)(nil)}) + data = append(data, seqfile.SeqData{Buf: []byte(l), Handle: (*netDev)(nil)}) } return data, 0 @@ -210,10 +213,6 @@ func (n *netUnix) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ([]s } var buf bytes.Buffer - // Header - fmt.Fprintf(&buf, "Num RefCount Protocol Flags Type St Inode Path\n") - - // Entries for _, se := range n.k.ListSockets() { s := se.Sock.Get() if s == nil { @@ -222,6 +221,7 @@ func (n *netUnix) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ([]s } sfile := s.(*fs.File) if family, _, _ := sfile.FileOperations.(socket.Socket).Type(); family != linux.AF_UNIX { + s.DecRef() // Not a unix socket. continue } @@ -281,12 +281,160 @@ func (n *netUnix) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ([]s } fmt.Fprintf(&buf, "\n") - sfile.DecRef() + s.DecRef() + } + + data := []seqfile.SeqData{ + { + Buf: []byte("Num RefCount Protocol Flags Type St Inode Path\n"), + Handle: n, + }, + { + Buf: buf.Bytes(), + Handle: n, + }, + } + return data, 0 +} + +// netTCP implements seqfile.SeqSource for /proc/net/tcp. +// +// +stateify savable +type netTCP struct { + k *kernel.Kernel +} + +// NeedsUpdate implements seqfile.SeqSource.NeedsUpdate. +func (*netTCP) NeedsUpdate(generation int64) bool { + return true +} + +// ReadSeqFileData implements seqfile.SeqSource.ReadSeqFileData. +func (n *netTCP) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ([]seqfile.SeqData, int64) { + t := kernel.TaskFromContext(ctx) + + if h != nil { + return nil, 0 + } + + var buf bytes.Buffer + for _, se := range n.k.ListSockets() { + s := se.Sock.Get() + if s == nil { + log.Debugf("Couldn't resolve weakref %+v in socket table, racing with destruction?", se.Sock) + continue + } + sfile := s.(*fs.File) + sops, ok := sfile.FileOperations.(socket.Socket) + if !ok { + panic(fmt.Sprintf("Found non-socket file in socket table: %+v", sfile)) + } + if family, stype, _ := sops.Type(); !(family == linux.AF_INET && stype == linux.SOCK_STREAM) { + s.DecRef() + // Not tcp4 sockets. + continue + } + + // Linux's documentation for the fields below can be found at + // https://www.kernel.org/doc/Documentation/networking/proc_net_tcp.txt. + // For Linux's implementation, see net/ipv4/tcp_ipv4.c:get_tcp4_sock(). + // Note that the header doesn't contain labels for all the fields. + + // Field: sl; entry number. + fmt.Fprintf(&buf, "%4d: ", se.ID) + + portBuf := make([]byte, 2) + + // Field: local_adddress. + var localAddr linux.SockAddrInet + if local, _, err := sops.GetSockName(t); err == nil { + localAddr = local.(linux.SockAddrInet) + } + binary.LittleEndian.PutUint16(portBuf, localAddr.Port) + fmt.Fprintf(&buf, "%08X:%04X ", + binary.LittleEndian.Uint32(localAddr.Addr[:]), + portBuf) + + // Field: rem_address. + var remoteAddr linux.SockAddrInet + if remote, _, err := sops.GetPeerName(t); err == nil { + remoteAddr = remote.(linux.SockAddrInet) + } + binary.LittleEndian.PutUint16(portBuf, remoteAddr.Port) + fmt.Fprintf(&buf, "%08X:%04X ", + binary.LittleEndian.Uint32(remoteAddr.Addr[:]), + portBuf) + + // Field: state; socket state. + fmt.Fprintf(&buf, "%02X ", sops.State()) + + // Field: tx_queue, rx_queue; number of packets in the transmit and + // receive queue. Unimplemented. + fmt.Fprintf(&buf, "%08X:%08X ", 0, 0) + + // Field: tr, tm->when; timer active state and number of jiffies + // until timer expires. Unimplemented. + fmt.Fprintf(&buf, "%02X:%08X ", 0, 0) + + // Field: retrnsmt; number of unrecovered RTO timeouts. + // Unimplemented. + fmt.Fprintf(&buf, "%08X ", 0) + + // Field: uid. + uattr, err := sfile.Dirent.Inode.UnstableAttr(ctx) + if err != nil { + log.Warningf("Failed to retrieve unstable attr for socket file: %v", err) + fmt.Fprintf(&buf, "%5d ", 0) + } else { + fmt.Fprintf(&buf, "%5d ", uint32(uattr.Owner.UID.In(t.UserNamespace()).OrOverflow())) + } + + // Field: timeout; number of unanswered 0-window probes. + // Unimplemented. + fmt.Fprintf(&buf, "%8d ", 0) + + // Field: inode. + fmt.Fprintf(&buf, "%8d ", sfile.InodeID()) + + // Field: refcount. Don't count the ref we obtain while deferencing + // the weakref to this socket. + fmt.Fprintf(&buf, "%d ", sfile.ReadRefs()-1) + + // Field: Socket struct address. Redacted due to the same reason as + // the 'Num' field in /proc/net/unix, see netUnix.ReadSeqFileData. + fmt.Fprintf(&buf, "%#016p ", (*socket.Socket)(nil)) + + // Field: retransmit timeout. Unimplemented. + fmt.Fprintf(&buf, "%d ", 0) + + // Field: predicted tick of soft clock (delayed ACK control data). + // Unimplemented. + fmt.Fprintf(&buf, "%d ", 0) + + // Field: (ack.quick<<1)|ack.pingpong, Unimplemented. + fmt.Fprintf(&buf, "%d ", 0) + + // Field: sending congestion window, Unimplemented. + fmt.Fprintf(&buf, "%d ", 0) + + // Field: Slow start size threshold, -1 if threshold >= 0xFFFF. + // Unimplemented, report as large threshold. + fmt.Fprintf(&buf, "%d", -1) + + fmt.Fprintf(&buf, "\n") + + s.DecRef() } - data := []seqfile.SeqData{{ - Buf: buf.Bytes(), - Handle: (*netUnix)(nil), - }} + data := []seqfile.SeqData{ + { + Buf: []byte(" sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode \n"), + Handle: n, + }, + { + Buf: buf.Bytes(), + Handle: n, + }, + } return data, 0 } diff --git a/pkg/sentry/fs/proc/net_test.go b/pkg/sentry/fs/proc/net_test.go index 9aed5fdca..f18681405 100644 --- a/pkg/sentry/fs/proc/net_test.go +++ b/pkg/sentry/fs/proc/net_test.go @@ -18,8 +18,8 @@ import ( "reflect" "testing" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/inet" ) func newIPv6TestStack() *inet.TestStack { diff --git a/pkg/sentry/fs/proc/proc.go b/pkg/sentry/fs/proc/proc.go index 0e15894b4..0ef13f2f5 100644 --- a/pkg/sentry/fs/proc/proc.go +++ b/pkg/sentry/fs/proc/proc.go @@ -20,15 +20,15 @@ import ( "sort" "strconv" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/device" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet" + "gvisor.dev/gvisor/pkg/syserror" ) // proc is a root proc node. @@ -68,7 +68,7 @@ func New(ctx context.Context, msrc *fs.MountSource, cgroupControllers map[string "filesystems": seqfile.NewSeqFileInode(ctx, &filesystemsData{}, msrc), "loadavg": seqfile.NewSeqFileInode(ctx, &loadavgData{}, msrc), "meminfo": seqfile.NewSeqFileInode(ctx, &meminfoData{k}, msrc), - "mounts": newProcInode(ramfs.NewSymlink(ctx, fs.RootOwner, "self/mounts"), msrc, fs.Symlink, nil), + "mounts": newProcInode(ctx, ramfs.NewSymlink(ctx, fs.RootOwner, "self/mounts"), msrc, fs.Symlink, nil), "self": newSelf(ctx, pidns, msrc), "stat": seqfile.NewSeqFileInode(ctx, &statData{k}, msrc), "thread-self": newThreadSelf(ctx, pidns, msrc), @@ -94,7 +94,7 @@ func New(ctx context.Context, msrc *fs.MountSource, cgroupControllers map[string p.AddChild(ctx, "net", p.newNetDir(ctx, k, msrc)) } - return newProcInode(p, msrc, fs.SpecialDirectory, nil), nil + return newProcInode(ctx, p, msrc, fs.SpecialDirectory, nil), nil } // self is a magical link. @@ -112,7 +112,7 @@ func newSelf(ctx context.Context, pidns *kernel.PIDNamespace, msrc *fs.MountSour Symlink: *ramfs.NewSymlink(ctx, fs.RootOwner, ""), pidns: pidns, } - return newProcInode(s, msrc, fs.Symlink, nil) + return newProcInode(ctx, s, msrc, fs.Symlink, nil) } // newThreadSelf returns a new "threadSelf" node. @@ -121,7 +121,7 @@ func newThreadSelf(ctx context.Context, pidns *kernel.PIDNamespace, msrc *fs.Mou Symlink: *ramfs.NewSymlink(ctx, fs.RootOwner, ""), pidns: pidns, } - return newProcInode(s, msrc, fs.Symlink, nil) + return newProcInode(ctx, s, msrc, fs.Symlink, nil) } // Readlink implements fs.InodeOperations.Readlink. @@ -185,7 +185,7 @@ func (p *proc) Lookup(ctx context.Context, dir *fs.Inode, name string) (*fs.Dire // Wrap it in a taskDir. td := p.newTaskDir(otherTask, dir.MountSource, true) - return fs.NewDirent(td, name), nil + return fs.NewDirent(ctx, td, name), nil } // GetFile implements fs.InodeOperations. diff --git a/pkg/sentry/fs/proc/rpcinet_proc.go b/pkg/sentry/fs/proc/rpcinet_proc.go index e36c0bfa6..01ac97530 100644 --- a/pkg/sentry/fs/proc/rpcinet_proc.go +++ b/pkg/sentry/fs/proc/rpcinet_proc.go @@ -17,19 +17,19 @@ package proc import ( "io" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) -// rpcInetInode implments fs.InodeOperations. +// rpcInetInode implements fs.InodeOperations. type rpcInetInode struct { fsutil.SimpleFileInode @@ -45,7 +45,7 @@ func newRPCInetInode(ctx context.Context, msrc *fs.MountSource, filepath string, filepath: filepath, k: kernel.KernelFromContext(ctx), } - return newProcInode(f, msrc, fs.SpecialFile, nil) + return newProcInode(ctx, f, msrc, fs.SpecialFile, nil) } // GetFile implements fs.InodeOperations.GetFile. @@ -141,7 +141,7 @@ func newRPCInetProcNet(ctx context.Context, msrc *fs.MountSource) *fs.Inode { } d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } // newRPCInetProcSysNet will build an inode for /proc/sys/net. @@ -152,7 +152,7 @@ func newRPCInetProcSysNet(ctx context.Context, msrc *fs.MountSource) *fs.Inode { } d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } // newRPCInetSysNetCore builds the /proc/sys/net/core directory. @@ -170,7 +170,7 @@ func newRPCInetSysNetCore(ctx context.Context, msrc *fs.MountSource) *fs.Inode { } d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } // newRPCInetSysNetIPv4Dir builds the /proc/sys/net/ipv4 directory. @@ -213,5 +213,5 @@ func newRPCInetSysNetIPv4Dir(ctx context.Context, msrc *fs.MountSource) *fs.Inod } d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } diff --git a/pkg/sentry/fs/proc/seqfile/BUILD b/pkg/sentry/fs/proc/seqfile/BUILD index 6b44c0075..20c3eefc8 100644 --- a/pkg/sentry/fs/proc/seqfile/BUILD +++ b/pkg/sentry/fs/proc/seqfile/BUILD @@ -5,7 +5,7 @@ load("//tools/go_stateify:defs.bzl", "go_library", "go_test") go_library( name = "seqfile", srcs = ["seqfile.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/fs/proc/seqfile/seqfile.go b/pkg/sentry/fs/proc/seqfile/seqfile.go index 8364d86ed..5fe823000 100644 --- a/pkg/sentry/fs/proc/seqfile/seqfile.go +++ b/pkg/sentry/fs/proc/seqfile/seqfile.go @@ -12,21 +12,22 @@ // See the License for the specific language governing permissions and // limitations under the License. +// Package seqfile provides dynamic ordered files. package seqfile import ( "io" "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/device" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/device" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // SeqHandle is a helper handle to seek in the file. @@ -133,7 +134,7 @@ func NewSeqFileInode(ctx context.Context, source SeqSource, msrc *fs.MountSource BlockSize: usermem.PageSize, Type: fs.SpecialFile, } - return fs.NewInode(iops, msrc, sattr) + return fs.NewInode(ctx, iops, msrc, sattr) } // UnstableAttr returns unstable attributes of the SeqFile. diff --git a/pkg/sentry/fs/proc/seqfile/seqfile_test.go b/pkg/sentry/fs/proc/seqfile/seqfile_test.go index c4de565eb..ebfeee835 100644 --- a/pkg/sentry/fs/proc/seqfile/seqfile_test.go +++ b/pkg/sentry/fs/proc/seqfile/seqfile_test.go @@ -20,11 +20,11 @@ import ( "io" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) type seqTest struct { @@ -120,15 +120,15 @@ func TestSeqFile(t *testing.T) { testSource.Init() // Create a file that can be R/W. - m := fs.NewPseudoMountSource() ctx := contexttest.Context(t) + m := fs.NewPseudoMountSource(ctx) contents := map[string]*fs.Inode{ "foo": NewSeqFileInode(ctx, testSource, m), } root := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0777)) // How about opening it? - inode := fs.NewInode(root, m, fs.StableAttr{Type: fs.Directory}) + inode := fs.NewInode(ctx, root, m, fs.StableAttr{Type: fs.Directory}) dirent2, err := root.Lookup(ctx, inode, "foo") if err != nil { t.Fatalf("failed to walk to foo for n2: %v", err) @@ -196,15 +196,15 @@ func TestSeqFileFileUpdated(t *testing.T) { testSource.update = true // Create a file that can be R/W. - m := fs.NewPseudoMountSource() ctx := contexttest.Context(t) + m := fs.NewPseudoMountSource(ctx) contents := map[string]*fs.Inode{ "foo": NewSeqFileInode(ctx, testSource, m), } root := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0777)) // How about opening it? - inode := fs.NewInode(root, m, fs.StableAttr{Type: fs.Directory}) + inode := fs.NewInode(ctx, root, m, fs.StableAttr{Type: fs.Directory}) dirent2, err := root.Lookup(ctx, inode, "foo") if err != nil { t.Fatalf("failed to walk to foo for dirent2: %v", err) diff --git a/pkg/sentry/fs/proc/stat.go b/pkg/sentry/fs/proc/stat.go index 397f9ec6b..b641effbb 100644 --- a/pkg/sentry/fs/proc/stat.go +++ b/pkg/sentry/fs/proc/stat.go @@ -18,10 +18,10 @@ import ( "bytes" "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/kernel" ) // statData backs /proc/stat. diff --git a/pkg/sentry/fs/proc/sys.go b/pkg/sentry/fs/proc/sys.go index 59846af4f..cd37776c8 100644 --- a/pkg/sentry/fs/proc/sys.go +++ b/pkg/sentry/fs/proc/sys.go @@ -19,16 +19,16 @@ import ( "io" "strconv" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/waiter" ) // mmapMinAddrData backs /proc/sys/vm/mmap_min_addr. @@ -82,14 +82,14 @@ func (p *proc) newKernelDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode } children := map[string]*fs.Inode{ - "hostname": newProcInode(&h, msrc, fs.SpecialFile, nil), + "hostname": newProcInode(ctx, &h, msrc, fs.SpecialFile, nil), "shmall": newStaticProcInode(ctx, msrc, []byte(strconv.FormatUint(linux.SHMALL, 10))), "shmmax": newStaticProcInode(ctx, msrc, []byte(strconv.FormatUint(linux.SHMMAX, 10))), "shmmni": newStaticProcInode(ctx, msrc, []byte(strconv.FormatUint(linux.SHMMNI, 10))), } d := ramfs.NewDir(ctx, children, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } func (p *proc) newVMDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { @@ -98,7 +98,7 @@ func (p *proc) newVMDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { "overcommit_memory": seqfile.NewSeqFileInode(ctx, &overcommitMemory{}, msrc), } d := ramfs.NewDir(ctx, children, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } func (p *proc) newSysDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { @@ -115,7 +115,7 @@ func (p *proc) newSysDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { } d := ramfs.NewDir(ctx, children, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } // hostname is the inode for a file containing the system hostname. diff --git a/pkg/sentry/fs/proc/sys_net.go b/pkg/sentry/fs/proc/sys_net.go index dbf1a987c..f3b63dfc2 100644 --- a/pkg/sentry/fs/proc/sys_net.go +++ b/pkg/sentry/fs/proc/sys_net.go @@ -19,15 +19,15 @@ import ( "io" "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/device" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/waiter" ) type tcpMemDir int @@ -74,7 +74,7 @@ func newTCPMemInode(ctx context.Context, msrc *fs.MountSource, s inet.Stack, dir BlockSize: usermem.PageSize, Type: fs.SpecialFile, } - return fs.NewInode(tm, msrc, sattr) + return fs.NewInode(ctx, tm, msrc, sattr) } // GetFile implements fs.InodeOperations.GetFile. @@ -184,7 +184,7 @@ func newTCPSackInode(ctx context.Context, msrc *fs.MountSource, s inet.Stack) *f BlockSize: usermem.PageSize, Type: fs.SpecialFile, } - return fs.NewInode(ts, msrc, sattr) + return fs.NewInode(ctx, ts, msrc, sattr) } // GetFile implements fs.InodeOperations.GetFile. @@ -277,7 +277,7 @@ func (p *proc) newSysNetCore(ctx context.Context, msrc *fs.MountSource, s inet.S } d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } func (p *proc) newSysNetIPv4Dir(ctx context.Context, msrc *fs.MountSource, s inet.Stack) *fs.Inode { @@ -339,7 +339,7 @@ func (p *proc) newSysNetIPv4Dir(ctx context.Context, msrc *fs.MountSource, s ine } d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } func (p *proc) newSysNetDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { @@ -351,5 +351,5 @@ func (p *proc) newSysNetDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode } } d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(d, msrc, fs.SpecialDirectory, nil) + return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } diff --git a/pkg/sentry/fs/proc/sys_net_test.go b/pkg/sentry/fs/proc/sys_net_test.go index 78135ba13..6abae7a60 100644 --- a/pkg/sentry/fs/proc/sys_net_test.go +++ b/pkg/sentry/fs/proc/sys_net_test.go @@ -17,9 +17,9 @@ package proc import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) func TestQuerySendBufferSize(t *testing.T) { diff --git a/pkg/sentry/fs/proc/task.go b/pkg/sentry/fs/proc/task.go index 21a965f90..87184ec67 100644 --- a/pkg/sentry/fs/proc/task.go +++ b/pkg/sentry/fs/proc/task.go @@ -21,20 +21,20 @@ import ( "sort" "strconv" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/device" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // getTaskMM returns t's MemoryManager. If getTaskMM succeeds, the MemoryManager's @@ -101,7 +101,7 @@ func (p *proc) newTaskDir(t *kernel.Task, msrc *fs.MountSource, showSubtasks boo Dir: *ramfs.NewDir(t, contents, fs.RootOwner, fs.FilePermsFromMode(0555)), t: t, } - return newProcInode(d, msrc, fs.SpecialDirectory, t) + return newProcInode(t, d, msrc, fs.SpecialDirectory, t) } // subtasks represents a /proc/TID/task directory. @@ -122,7 +122,7 @@ func (p *proc) newSubtasks(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { t: t, p: p, } - return newProcInode(s, msrc, fs.SpecialDirectory, t) + return newProcInode(t, s, msrc, fs.SpecialDirectory, t) } // UnstableAttr returns unstable attributes of the subtasks. @@ -162,6 +162,11 @@ func (f *subtasksFile) Readdir(ctx context.Context, file *fs.File, ser fs.Dentry // subtask to emit. offset := file.Offset() + tasks := f.t.ThreadGroup().MemberIDs(f.pidns) + if len(tasks) == 0 { + return offset, syserror.ENOENT + } + if offset == 0 { // Serialize "." and "..". root := fs.RootFromContext(ctx) @@ -178,12 +183,12 @@ func (f *subtasksFile) Readdir(ctx context.Context, file *fs.File, ser fs.Dentry } // Serialize tasks. - tasks := f.t.ThreadGroup().MemberIDs(f.pidns) taskInts := make([]int, 0, len(tasks)) for _, tid := range tasks { taskInts = append(taskInts, int(tid)) } + sort.Sort(sort.IntSlice(taskInts)) // Find the task to start at. idx := sort.SearchInts(taskInts, int(offset)) if idx == len(taskInts) { @@ -223,7 +228,7 @@ func (s *subtasks) Lookup(ctx context.Context, dir *fs.Inode, p string) (*fs.Dir } td := s.p.newTaskDir(task, dir.MountSource, false) - return fs.NewDirent(td, p), nil + return fs.NewDirent(ctx, td, p), nil } // exe is an fs.InodeOperations symlink for the /proc/PID/exe file. @@ -240,7 +245,7 @@ func newExe(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { Symlink: *ramfs.NewSymlink(t, fs.RootOwner, ""), t: t, } - return newProcInode(exeSymlink, msrc, fs.Symlink, t) + return newProcInode(t, exeSymlink, msrc, fs.Symlink, t) } func (e *exe) executable() (d *fs.Dirent, err error) { @@ -308,7 +313,7 @@ func newNamespaceSymlink(t *kernel.Task, msrc *fs.MountSource, name string) *fs. Symlink: *ramfs.NewSymlink(t, fs.RootOwner, target), t: t, } - return newProcInode(n, msrc, fs.Symlink, t) + return newProcInode(t, n, msrc, fs.Symlink, t) } // Getlink implements fs.InodeOperations.Getlink. @@ -319,7 +324,7 @@ func (n *namespaceSymlink) Getlink(ctx context.Context, inode *fs.Inode) (*fs.Di // Create a new regular file to fake the namespace file. iops := fsutil.NewNoReadWriteFileInode(ctx, fs.RootOwner, fs.FilePermsFromMode(0777), linux.PROC_SUPER_MAGIC) - return fs.NewDirent(newProcInode(iops, inode.MountSource, fs.RegularFile, nil), n.Symlink.Target), nil + return fs.NewDirent(ctx, newProcInode(ctx, iops, inode.MountSource, fs.RegularFile, nil), n.Symlink.Target), nil } func newNamespaceDir(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { @@ -329,7 +334,7 @@ func newNamespaceDir(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { "user": newNamespaceSymlink(t, msrc, "user"), } d := ramfs.NewDir(t, contents, fs.RootOwner, fs.FilePermsFromMode(0511)) - return newProcInode(d, msrc, fs.SpecialDirectory, t) + return newProcInode(t, d, msrc, fs.SpecialDirectory, t) } // mapsData implements seqfile.SeqSource for /proc/[pid]/maps. @@ -340,7 +345,7 @@ type mapsData struct { } func newMaps(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { - return newProcInode(seqfile.NewSeqFile(t, &mapsData{t}), msrc, fs.SpecialFile, t) + return newProcInode(t, seqfile.NewSeqFile(t, &mapsData{t}), msrc, fs.SpecialFile, t) } func (md *mapsData) mm() *mm.MemoryManager { @@ -380,7 +385,7 @@ type smapsData struct { } func newSmaps(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { - return newProcInode(seqfile.NewSeqFile(t, &smapsData{t}), msrc, fs.SpecialFile, t) + return newProcInode(t, seqfile.NewSeqFile(t, &smapsData{t}), msrc, fs.SpecialFile, t) } func (sd *smapsData) mm() *mm.MemoryManager { @@ -426,7 +431,7 @@ type taskStatData struct { } func newTaskStat(t *kernel.Task, msrc *fs.MountSource, showSubtasks bool, pidns *kernel.PIDNamespace) *fs.Inode { - return newProcInode(seqfile.NewSeqFile(t, &taskStatData{t, showSubtasks /* tgstats */, pidns}), msrc, fs.SpecialFile, t) + return newProcInode(t, seqfile.NewSeqFile(t, &taskStatData{t, showSubtasks /* tgstats */, pidns}), msrc, fs.SpecialFile, t) } // NeedsUpdate returns whether the generation is old or not. @@ -511,7 +516,7 @@ type statmData struct { } func newStatm(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { - return newProcInode(seqfile.NewSeqFile(t, &statmData{t}), msrc, fs.SpecialFile, t) + return newProcInode(t, seqfile.NewSeqFile(t, &statmData{t}), msrc, fs.SpecialFile, t) } // NeedsUpdate implements seqfile.SeqSource.NeedsUpdate. @@ -548,7 +553,7 @@ type statusData struct { } func newStatus(t *kernel.Task, msrc *fs.MountSource, pidns *kernel.PIDNamespace) *fs.Inode { - return newProcInode(seqfile.NewSeqFile(t, &statusData{t, pidns}), msrc, fs.SpecialFile, t) + return newProcInode(t, seqfile.NewSeqFile(t, &statusData{t, pidns}), msrc, fs.SpecialFile, t) } // NeedsUpdate implements seqfile.SeqSource.NeedsUpdate. @@ -580,8 +585,8 @@ func (s *statusData) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ( var fds int var vss, rss, data uint64 s.t.WithMuLocked(func(t *kernel.Task) { - if fdm := t.FDMap(); fdm != nil { - fds = fdm.Size() + if fdTable := t.FDTable(); fdTable != nil { + fds = fdTable.Size() } if mm := t.MemoryManager(); mm != nil { vss = mm.VirtualMemorySize() @@ -615,7 +620,7 @@ type ioData struct { } func newIO(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { - return newProcInode(seqfile.NewSeqFile(t, &ioData{t.ThreadGroup()}), msrc, fs.SpecialFile, t) + return newProcInode(t, seqfile.NewSeqFile(t, &ioData{t.ThreadGroup()}), msrc, fs.SpecialFile, t) } // NeedsUpdate returns whether the generation is old or not. @@ -664,7 +669,7 @@ func newComm(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { SimpleFileInode: *fsutil.NewSimpleFileInode(t, fs.RootOwner, fs.FilePermsFromMode(0444), linux.PROC_SUPER_MAGIC), t: t, } - return newProcInode(c, msrc, fs.SpecialFile, t) + return newProcInode(t, c, msrc, fs.SpecialFile, t) } // Check implements fs.InodeOperations.Check. @@ -736,7 +741,7 @@ func newAuxvec(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { SimpleFileInode: *fsutil.NewSimpleFileInode(t, fs.RootOwner, fs.FilePermsFromMode(0444), linux.PROC_SUPER_MAGIC), t: t, } - return newProcInode(a, msrc, fs.SpecialFile, t) + return newProcInode(t, a, msrc, fs.SpecialFile, t) } // GetFile implements fs.InodeOperations.GetFile. diff --git a/pkg/sentry/fs/proc/uid_gid_map.go b/pkg/sentry/fs/proc/uid_gid_map.go index a14b1b45f..eea37d15c 100644 --- a/pkg/sentry/fs/proc/uid_gid_map.go +++ b/pkg/sentry/fs/proc/uid_gid_map.go @@ -19,15 +19,15 @@ import ( "fmt" "io" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // idMapInodeOperations implements fs.InodeOperations for @@ -66,7 +66,7 @@ func newGIDMap(t *kernel.Task, msrc *fs.MountSource) *fs.Inode { } func newIDMap(t *kernel.Task, msrc *fs.MountSource, gids bool) *fs.Inode { - return newProcInode(&idMapInodeOperations{ + return newProcInode(t, &idMapInodeOperations{ InodeSimpleAttributes: fsutil.NewInodeSimpleAttributes(t, fs.RootOwner, fs.FilePermsFromMode(0644), linux.PROC_SUPER_MAGIC), t: t, gids: gids, diff --git a/pkg/sentry/fs/proc/uptime.go b/pkg/sentry/fs/proc/uptime.go index 35c3851e1..4e903917a 100644 --- a/pkg/sentry/fs/proc/uptime.go +++ b/pkg/sentry/fs/proc/uptime.go @@ -18,14 +18,14 @@ import ( "fmt" "io" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // uptime is a file containing the system uptime. @@ -44,7 +44,7 @@ func newUptime(ctx context.Context, msrc *fs.MountSource) *fs.Inode { SimpleFileInode: *fsutil.NewSimpleFileInode(ctx, fs.RootOwner, fs.FilePermsFromMode(0444), linux.PROC_SUPER_MAGIC), startTime: ktime.NowFromContext(ctx), } - return newProcInode(u, msrc, fs.SpecialFile, nil) + return newProcInode(ctx, u, msrc, fs.SpecialFile, nil) } // GetFile implements fs.InodeOperations.GetFile. diff --git a/pkg/sentry/fs/proc/version.go b/pkg/sentry/fs/proc/version.go index a5479990c..a6d2c3cd3 100644 --- a/pkg/sentry/fs/proc/version.go +++ b/pkg/sentry/fs/proc/version.go @@ -17,9 +17,9 @@ package proc import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/kernel" ) // versionData backs /proc/version. diff --git a/pkg/sentry/fs/ramfs/BUILD b/pkg/sentry/fs/ramfs/BUILD index f36e4a5e8..516efcc4c 100644 --- a/pkg/sentry/fs/ramfs/BUILD +++ b/pkg/sentry/fs/ramfs/BUILD @@ -10,7 +10,7 @@ go_library( "symlink.go", "tree.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/ramfs", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/fs/ramfs/dir.go b/pkg/sentry/fs/ramfs/dir.go index cd6e03d66..f3e984c24 100644 --- a/pkg/sentry/fs/ramfs/dir.go +++ b/pkg/sentry/fs/ramfs/dir.go @@ -12,6 +12,7 @@ // See the License for the specific language governing permissions and // limitations under the License. +// Package ramfs provides the fundamentals for a simple in-memory filesystem. package ramfs import ( @@ -19,12 +20,12 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/syserror" ) // CreateOps represents operations to create different file types. @@ -269,7 +270,7 @@ func (d *Dir) Lookup(ctx context.Context, _ *fs.Inode, p string) (*fs.Dirent, er // Take a reference on the inode before returning it. This reference // is owned by the dirent we are about to create. inode.IncRef() - return fs.NewDirent(inode, p), nil + return fs.NewDirent(ctx, inode, p), nil } // walkLocked must be called with d.mu held. @@ -321,7 +322,7 @@ func (d *Dir) Create(ctx context.Context, dir *fs.Inode, name string, flags fs.F inode.IncRef() // Create the Dirent and corresponding file. - created := fs.NewDirent(inode, name) + created := fs.NewDirent(ctx, inode, name) defer created.DecRef() return created.Inode.GetFile(ctx, created, flags) } @@ -382,7 +383,7 @@ func (d *Dir) Bind(ctx context.Context, dir *fs.Inode, name string, ep transport } // Take another ref on inode which will be donated to the new dirent. inode.IncRef() - return fs.NewDirent(inode, name), nil + return fs.NewDirent(ctx, inode, name), nil } // CreateFifo implements fs.InodeOperations.CreateFifo. @@ -430,7 +431,7 @@ func (dfo *dirFileOperations) Seek(ctx context.Context, file *fs.File, whence fs } // IterateDir implements DirIterator.IterateDir. -func (dfo *dirFileOperations) IterateDir(ctx context.Context, dirCtx *fs.DirCtx, offset int) (int, error) { +func (dfo *dirFileOperations) IterateDir(ctx context.Context, d *fs.Dirent, dirCtx *fs.DirCtx, offset int) (int, error) { dfo.dir.mu.Lock() defer dfo.dir.mu.Unlock() diff --git a/pkg/sentry/fs/ramfs/socket.go b/pkg/sentry/fs/ramfs/socket.go index 7d8bca70e..a24fe2ea2 100644 --- a/pkg/sentry/fs/ramfs/socket.go +++ b/pkg/sentry/fs/ramfs/socket.go @@ -15,12 +15,12 @@ package ramfs import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/waiter" ) // Socket represents a socket. diff --git a/pkg/sentry/fs/ramfs/symlink.go b/pkg/sentry/fs/ramfs/symlink.go index 21c246169..fcfaa29aa 100644 --- a/pkg/sentry/fs/ramfs/symlink.go +++ b/pkg/sentry/fs/ramfs/symlink.go @@ -15,11 +15,11 @@ package ramfs import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/waiter" ) // Symlink represents a symlink. diff --git a/pkg/sentry/fs/ramfs/tree.go b/pkg/sentry/fs/ramfs/tree.go index 8c6b31f70..702cc4a1e 100644 --- a/pkg/sentry/fs/ramfs/tree.go +++ b/pkg/sentry/fs/ramfs/tree.go @@ -19,10 +19,10 @@ import ( "path" "strings" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/anon" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/anon" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // MakeDirectoryTree constructs a ramfs tree of all directories containing @@ -68,7 +68,7 @@ func makeSubdir(ctx context.Context, msrc *fs.MountSource, root *Dir, subdir str // emptyDir returns an empty *ramfs.Dir with all permissions granted. func emptyDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { dir := NewDir(ctx, make(map[string]*fs.Inode), fs.RootOwner, fs.FilePermsFromMode(0777)) - return fs.NewInode(dir, msrc, fs.StableAttr{ + return fs.NewInode(ctx, dir, msrc, fs.StableAttr{ DeviceID: anon.PseudoDevice.DeviceID(), InodeID: anon.PseudoDevice.NextIno(), BlockSize: usermem.PageSize, diff --git a/pkg/sentry/fs/ramfs/tree_test.go b/pkg/sentry/fs/ramfs/tree_test.go index 27abeb6ba..61a7e2900 100644 --- a/pkg/sentry/fs/ramfs/tree_test.go +++ b/pkg/sentry/fs/ramfs/tree_test.go @@ -17,12 +17,11 @@ package ramfs import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" ) func TestMakeDirectoryTree(t *testing.T) { - mount := fs.NewPseudoMountSource() for _, test := range []struct { name string @@ -54,6 +53,7 @@ func TestMakeDirectoryTree(t *testing.T) { }, } { ctx := contexttest.Context(t) + mount := fs.NewPseudoMountSource(ctx) tree, err := MakeDirectoryTree(ctx, mount, test.subdirs) if err != nil { t.Errorf("%s: failed to make ramfs tree, got error %v, want nil", test.name, err) diff --git a/pkg/sentry/fs/save.go b/pkg/sentry/fs/save.go index 2eaf6ab69..fe5c76b44 100644 --- a/pkg/sentry/fs/save.go +++ b/pkg/sentry/fs/save.go @@ -18,7 +18,7 @@ import ( "fmt" "syscall" - "gvisor.googlesource.com/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/log" ) // SaveInodeMappings saves a mapping of path -> inode ID for every diff --git a/pkg/sentry/fs/splice.go b/pkg/sentry/fs/splice.go index 65937f44d..eed1c2854 100644 --- a/pkg/sentry/fs/splice.go +++ b/pkg/sentry/fs/splice.go @@ -18,9 +18,9 @@ import ( "io" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/secio" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/secio" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/syserror" ) // Splice moves data to this file, directly from another. @@ -88,6 +88,8 @@ func Splice(ctx context.Context, dst *File, src *File, opts SpliceOpts) (int64, // Check append-only mode and the limit. if !dstPipe { + unlock := dst.Dirent.Inode.lockAppendMu(dst.Flags().Append) + defer unlock() if dst.Flags().Append { if opts.DstOffset { // We need to acquire the lock. diff --git a/pkg/sentry/fs/sys/BUILD b/pkg/sentry/fs/sys/BUILD index 42e98230e..70fa3af89 100644 --- a/pkg/sentry/fs/sys/BUILD +++ b/pkg/sentry/fs/sys/BUILD @@ -10,7 +10,7 @@ go_library( "fs.go", "sys.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/sys", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/sys", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/fs/sys/device.go b/pkg/sentry/fs/sys/device.go index 128d3a9d9..4e79dbb71 100644 --- a/pkg/sentry/fs/sys/device.go +++ b/pkg/sentry/fs/sys/device.go @@ -14,7 +14,7 @@ package sys -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" // sysfsDevice is the sysfs virtual device. var sysfsDevice = device.NewAnonDevice() diff --git a/pkg/sentry/fs/sys/devices.go b/pkg/sentry/fs/sys/devices.go index 54f35c6a0..4f78ca8d2 100644 --- a/pkg/sentry/fs/sys/devices.go +++ b/pkg/sentry/fs/sys/devices.go @@ -17,11 +17,11 @@ package sys import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel" ) // +stateify savable @@ -58,7 +58,7 @@ func newPossible(ctx context.Context, msrc *fs.MountSource) *fs.Inode { Contents: contents, }, } - return newFile(c, msrc) + return newFile(ctx, c, msrc) } func newCPU(ctx context.Context, msrc *fs.MountSource) *fs.Inode { diff --git a/pkg/sentry/fs/sys/fs.go b/pkg/sentry/fs/sys/fs.go index f0c2322e0..e60b63e75 100644 --- a/pkg/sentry/fs/sys/fs.go +++ b/pkg/sentry/fs/sys/fs.go @@ -15,8 +15,8 @@ package sys import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // filesystem is a sysfs. @@ -30,7 +30,7 @@ func init() { fs.RegisterFilesystem(&filesystem{}) } -// FilesystemName is the name underwhich the filesystem is registered. +// FilesystemName is the name under which the filesystem is registered. // Name matches fs/sysfs/mount.c:sysfs_fs_type.name. const FilesystemName = "sysfs" @@ -61,5 +61,5 @@ func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSou // device is always ignored. // sysfs ignores data, see fs/sysfs/mount.c:sysfs_mount. - return New(ctx, fs.NewNonCachingMountSource(f, flags)), nil + return New(ctx, fs.NewNonCachingMountSource(ctx, f, flags)), nil } diff --git a/pkg/sentry/fs/sys/sys.go b/pkg/sentry/fs/sys/sys.go index d20ef91fa..b14bf3f55 100644 --- a/pkg/sentry/fs/sys/sys.go +++ b/pkg/sentry/fs/sys/sys.go @@ -16,25 +16,25 @@ package sys import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) -func newFile(node fs.InodeOperations, msrc *fs.MountSource) *fs.Inode { +func newFile(ctx context.Context, node fs.InodeOperations, msrc *fs.MountSource) *fs.Inode { sattr := fs.StableAttr{ DeviceID: sysfsDevice.DeviceID(), InodeID: sysfsDevice.NextIno(), BlockSize: usermem.PageSize, Type: fs.SpecialFile, } - return fs.NewInode(node, msrc, sattr) + return fs.NewInode(ctx, node, msrc, sattr) } func newDir(ctx context.Context, msrc *fs.MountSource, contents map[string]*fs.Inode) *fs.Inode { d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return fs.NewInode(d, msrc, fs.StableAttr{ + return fs.NewInode(ctx, d, msrc, fs.StableAttr{ DeviceID: sysfsDevice.DeviceID(), InodeID: sysfsDevice.NextIno(), BlockSize: usermem.PageSize, diff --git a/pkg/sentry/fs/timerfd/BUILD b/pkg/sentry/fs/timerfd/BUILD index 0e06a5028..1d80daeaf 100644 --- a/pkg/sentry/fs/timerfd/BUILD +++ b/pkg/sentry/fs/timerfd/BUILD @@ -5,7 +5,7 @@ load("//tools/go_stateify:defs.bzl", "go_library") go_library( name = "timerfd", srcs = ["timerfd.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/timerfd", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/timerfd", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/sentry/context", diff --git a/pkg/sentry/fs/timerfd/timerfd.go b/pkg/sentry/fs/timerfd/timerfd.go index c1721f434..59403d9db 100644 --- a/pkg/sentry/fs/timerfd/timerfd.go +++ b/pkg/sentry/fs/timerfd/timerfd.go @@ -19,14 +19,14 @@ package timerfd import ( "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/anon" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/anon" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // TimerOperations implements fs.FileOperations for timerfds. @@ -53,7 +53,7 @@ type TimerOperations struct { // NewFile returns a timerfd File that receives time from c. func NewFile(ctx context.Context, c ktime.Clock) *fs.File { - dirent := fs.NewDirent(anon.NewInode(ctx), "anon_inode:[timerfd]") + dirent := fs.NewDirent(ctx, anon.NewInode(ctx), "anon_inode:[timerfd]") // Release the initial dirent reference after NewFile takes a reference. defer dirent.DecRef() tops := &TimerOperations{} diff --git a/pkg/sentry/fs/tmpfs/BUILD b/pkg/sentry/fs/tmpfs/BUILD index 9570c71e5..8f7eb5757 100644 --- a/pkg/sentry/fs/tmpfs/BUILD +++ b/pkg/sentry/fs/tmpfs/BUILD @@ -11,7 +11,7 @@ go_library( "inode_file.go", "tmpfs.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/tmpfs", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/tmpfs", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/fs/tmpfs/device.go b/pkg/sentry/fs/tmpfs/device.go index 179c3a46f..ae7c55ee1 100644 --- a/pkg/sentry/fs/tmpfs/device.go +++ b/pkg/sentry/fs/tmpfs/device.go @@ -14,7 +14,7 @@ package tmpfs -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" // tmpfsDevice is the kernel tmpfs device. var tmpfsDevice = device.NewAnonDevice() diff --git a/pkg/sentry/fs/tmpfs/file_regular.go b/pkg/sentry/fs/tmpfs/file_regular.go index d1c163879..9a6943fe4 100644 --- a/pkg/sentry/fs/tmpfs/file_regular.go +++ b/pkg/sentry/fs/tmpfs/file_regular.go @@ -15,12 +15,12 @@ package tmpfs import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/waiter" ) // regularFileOperations implements fs.FileOperations for a regular diff --git a/pkg/sentry/fs/tmpfs/file_test.go b/pkg/sentry/fs/tmpfs/file_test.go index b44c06556..0075ef023 100644 --- a/pkg/sentry/fs/tmpfs/file_test.go +++ b/pkg/sentry/fs/tmpfs/file_test.go @@ -18,17 +18,17 @@ import ( "bytes" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/contexttest" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) func newFileInode(ctx context.Context) *fs.Inode { - m := fs.NewCachingMountSource(&Filesystem{}, fs.MountSourceFlags{}) + m := fs.NewCachingMountSource(ctx, &Filesystem{}, fs.MountSourceFlags{}) iops := NewInMemoryFile(ctx, usage.Tmpfs, fs.WithCurrentTime(ctx, fs.UnstableAttr{})) - return fs.NewInode(iops, m, fs.StableAttr{ + return fs.NewInode(ctx, iops, m, fs.StableAttr{ DeviceID: tmpfsDevice.DeviceID(), InodeID: tmpfsDevice.NextIno(), BlockSize: usermem.PageSize, @@ -38,7 +38,7 @@ func newFileInode(ctx context.Context) *fs.Inode { func newFile(ctx context.Context) *fs.File { inode := newFileInode(ctx) - f, _ := inode.GetFile(ctx, fs.NewDirent(inode, "stub"), fs.FileFlags{Read: true, Write: true}) + f, _ := inode.GetFile(ctx, fs.NewDirent(ctx, inode, "stub"), fs.FileFlags{Read: true, Write: true}) return f } diff --git a/pkg/sentry/fs/tmpfs/fs.go b/pkg/sentry/fs/tmpfs/fs.go index 83e1bf247..be98ad751 100644 --- a/pkg/sentry/fs/tmpfs/fs.go +++ b/pkg/sentry/fs/tmpfs/fs.go @@ -18,10 +18,10 @@ import ( "fmt" "strconv" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" ) const ( @@ -65,7 +65,7 @@ func init() { fs.RegisterFilesystem(&Filesystem{}) } -// FilesystemName is the name underwhich the filesystem is registered. +// FilesystemName is the name under which the filesystem is registered. // Name matches mm/shmem.c:shmem_fs_type.name. const FilesystemName = "tmpfs" @@ -133,12 +133,15 @@ func (f *Filesystem) Mount(ctx context.Context, device string, flags fs.MountSou } // Construct a mount which will follow the cache options provided. + // + // TODO(gvisor.dev/issue/179): There should be no reason to disable + // caching once bind mounts are properly supported. var msrc *fs.MountSource switch options[cacheKey] { case "", cacheAll: - msrc = fs.NewCachingMountSource(f, flags) + msrc = fs.NewCachingMountSource(ctx, f, flags) case cacheRevalidate: - msrc = fs.NewRevalidatingMountSource(f, flags) + msrc = fs.NewRevalidatingMountSource(ctx, f, flags) default: return nil, fmt.Errorf("invalid cache policy option %q", options[cacheKey]) } diff --git a/pkg/sentry/fs/tmpfs/inode_file.go b/pkg/sentry/fs/tmpfs/inode_file.go index 3fe659543..f86dfaa36 100644 --- a/pkg/sentry/fs/tmpfs/inode_file.go +++ b/pkg/sentry/fs/tmpfs/inode_file.go @@ -20,18 +20,18 @@ import ( "sync" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) var ( @@ -128,7 +128,7 @@ func NewMemfdInode(ctx context.Context, allowSeals bool) *fs.Inode { if allowSeals { iops.seals = 0 } - return fs.NewInode(iops, fs.NewNonCachingMountSource(nil, fs.MountSourceFlags{}), fs.StableAttr{ + return fs.NewInode(ctx, iops, fs.NewNonCachingMountSource(ctx, nil, fs.MountSourceFlags{}), fs.StableAttr{ Type: fs.RegularFile, DeviceID: tmpfsDevice.DeviceID(), InodeID: tmpfsDevice.NextIno(), diff --git a/pkg/sentry/fs/tmpfs/tmpfs.go b/pkg/sentry/fs/tmpfs/tmpfs.go index 263d10cfe..0f4497cd6 100644 --- a/pkg/sentry/fs/tmpfs/tmpfs.go +++ b/pkg/sentry/fs/tmpfs/tmpfs.go @@ -16,17 +16,17 @@ package tmpfs import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ramfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/pipe" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) var fsInfo = fs.Info{ @@ -90,7 +90,7 @@ func NewDir(ctx context.Context, contents map[string]*fs.Inode, owner fs.FileOwn // Manually set the CreateOps. d.ramfsDir.CreateOps = d.newCreateOps() - return fs.NewInode(d, msrc, fs.StableAttr{ + return fs.NewInode(ctx, d, msrc, fs.StableAttr{ DeviceID: tmpfsDevice.DeviceID(), InodeID: tmpfsDevice.NextIno(), BlockSize: usermem.PageSize, @@ -218,7 +218,7 @@ func (d *Dir) newCreateOps() *ramfs.CreateOps { Links: 0, }) iops := NewInMemoryFile(ctx, usage.Tmpfs, uattr) - return fs.NewInode(iops, dir.MountSource, fs.StableAttr{ + return fs.NewInode(ctx, iops, dir.MountSource, fs.StableAttr{ DeviceID: tmpfsDevice.DeviceID(), InodeID: tmpfsDevice.NextIno(), BlockSize: usermem.PageSize, @@ -262,7 +262,7 @@ type Symlink struct { // NewSymlink returns a new symlink with the provided permissions. func NewSymlink(ctx context.Context, target string, owner fs.FileOwner, msrc *fs.MountSource) *fs.Inode { s := &Symlink{Symlink: *ramfs.NewSymlink(ctx, owner, target)} - return fs.NewInode(s, msrc, fs.StableAttr{ + return fs.NewInode(ctx, s, msrc, fs.StableAttr{ DeviceID: tmpfsDevice.DeviceID(), InodeID: tmpfsDevice.NextIno(), BlockSize: usermem.PageSize, @@ -292,7 +292,7 @@ type Socket struct { // NewSocket returns a new socket with the provided permissions. func NewSocket(ctx context.Context, socket transport.BoundEndpoint, owner fs.FileOwner, perms fs.FilePermissions, msrc *fs.MountSource) *fs.Inode { s := &Socket{Socket: *ramfs.NewSocket(ctx, socket, owner, perms)} - return fs.NewInode(s, msrc, fs.StableAttr{ + return fs.NewInode(ctx, s, msrc, fs.StableAttr{ DeviceID: tmpfsDevice.DeviceID(), InodeID: tmpfsDevice.NextIno(), BlockSize: usermem.PageSize, @@ -329,7 +329,7 @@ func NewFifo(ctx context.Context, owner fs.FileOwner, perms fs.FilePermissions, fifoIops := &Fifo{iops} // Build a new Inode. - return fs.NewInode(fifoIops, msrc, fs.StableAttr{ + return fs.NewInode(ctx, fifoIops, msrc, fs.StableAttr{ DeviceID: tmpfsDevice.DeviceID(), InodeID: tmpfsDevice.NextIno(), BlockSize: usermem.PageSize, diff --git a/pkg/sentry/fs/tty/BUILD b/pkg/sentry/fs/tty/BUILD index 908d9de09..5e9327aec 100644 --- a/pkg/sentry/fs/tty/BUILD +++ b/pkg/sentry/fs/tty/BUILD @@ -13,7 +13,7 @@ go_library( "slave.go", "terminal.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty", + importpath = "gvisor.dev/gvisor/pkg/sentry/fs/tty", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/fs/tty/dir.go b/pkg/sentry/fs/tty/dir.go index 2603354c4..1d128532b 100644 --- a/pkg/sentry/fs/tty/dir.go +++ b/pkg/sentry/fs/tty/dir.go @@ -21,15 +21,15 @@ import ( "strconv" "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // dirInodeOperations is the root of a devpts mount. @@ -114,7 +114,7 @@ func newDir(ctx context.Context, m *fs.MountSource) *fs.Inode { InodeID: d.master.StableAttr.InodeID, }) - return fs.NewInode(d, m, fs.StableAttr{ + return fs.NewInode(ctx, d, m, fs.StableAttr{ DeviceID: ptsDevice.DeviceID(), // N.B. Linux always uses inode id 1 for the directory. See // fs/devpts/inode.c:devpts_fill_super. @@ -143,7 +143,7 @@ func (d *dirInodeOperations) Lookup(ctx context.Context, dir *fs.Inode, name str // Master? if name == "ptmx" { d.master.IncRef() - return fs.NewDirent(d.master, name), nil + return fs.NewDirent(ctx, d.master, name), nil } // Slave number? @@ -159,7 +159,7 @@ func (d *dirInodeOperations) Lookup(ctx context.Context, dir *fs.Inode, name str } s.IncRef() - return fs.NewDirent(s, name), nil + return fs.NewDirent(ctx, s, name), nil } // Create implements fs.InodeOperations.Create. @@ -307,7 +307,7 @@ type dirFileOperations struct { var _ fs.FileOperations = (*dirFileOperations)(nil) // IterateDir implements DirIterator.IterateDir. -func (df *dirFileOperations) IterateDir(ctx context.Context, dirCtx *fs.DirCtx, offset int) (int, error) { +func (df *dirFileOperations) IterateDir(ctx context.Context, d *fs.Dirent, dirCtx *fs.DirCtx, offset int) (int, error) { df.di.mu.Lock() defer df.di.mu.Unlock() diff --git a/pkg/sentry/fs/tty/fs.go b/pkg/sentry/fs/tty/fs.go index 701b2f7d9..edee56c12 100644 --- a/pkg/sentry/fs/tty/fs.go +++ b/pkg/sentry/fs/tty/fs.go @@ -15,10 +15,10 @@ package tty import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/syserror" ) // ptsDevice is the pseudo-filesystem device. @@ -67,7 +67,7 @@ func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSou return nil, syserror.EINVAL } - return newDir(ctx, fs.NewMountSource(&superOperations{}, f, flags)), nil + return newDir(ctx, fs.NewMountSource(ctx, &superOperations{}, f, flags)), nil } // superOperations implements fs.MountSourceOperations, preventing caching. @@ -94,6 +94,13 @@ func (superOperations) Keep(*fs.Dirent) bool { return false } +// CacheReaddir implements fs.DirentOperations.CacheReaddir. +// +// CacheReaddir returns false because entries change on master operations. +func (superOperations) CacheReaddir() bool { + return false +} + // ResetInodeMappings implements MountSourceOperations.ResetInodeMappings. func (superOperations) ResetInodeMappings() {} diff --git a/pkg/sentry/fs/tty/line_discipline.go b/pkg/sentry/fs/tty/line_discipline.go index 20d29d130..7cc0eb409 100644 --- a/pkg/sentry/fs/tty/line_discipline.go +++ b/pkg/sentry/fs/tty/line_discipline.go @@ -19,12 +19,12 @@ import ( "sync" "unicode/utf8" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) const ( diff --git a/pkg/sentry/fs/tty/master.go b/pkg/sentry/fs/tty/master.go index afdf44cd1..92ec1ca18 100644 --- a/pkg/sentry/fs/tty/master.go +++ b/pkg/sentry/fs/tty/master.go @@ -15,15 +15,15 @@ package tty import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/unimpl" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/unimpl" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // masterInodeOperations are the fs.InodeOperations for the master end of the @@ -46,7 +46,7 @@ func newMasterInode(ctx context.Context, d *dirInodeOperations, owner fs.FileOwn d: d, } - return fs.NewInode(iops, d.msrc, fs.StableAttr{ + return fs.NewInode(ctx, iops, d.msrc, fs.StableAttr{ DeviceID: ptsDevice.DeviceID(), // N.B. Linux always uses inode id 2 for ptmx. See // fs/devpts/inode.c:mknod_ptmx. @@ -144,7 +144,7 @@ func (mf *masterFileOperations) Write(ctx context.Context, _ *fs.File, src userm } // Ioctl implements fs.FileOperations.Ioctl. -func (mf *masterFileOperations) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (mf *masterFileOperations) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { switch cmd := args[1].Uint(); cmd { case linux.FIONREAD: // linux.FIONREAD == linux.TIOCINQ // Get the number of bytes in the output queue read buffer. diff --git a/pkg/sentry/fs/tty/queue.go b/pkg/sentry/fs/tty/queue.go index 11fb92be3..231e4e6eb 100644 --- a/pkg/sentry/fs/tty/queue.go +++ b/pkg/sentry/fs/tty/queue.go @@ -17,13 +17,13 @@ package tty import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // waitBufMaxBytes is the maximum size of a wait buffer. It is based on diff --git a/pkg/sentry/fs/tty/slave.go b/pkg/sentry/fs/tty/slave.go index 2abf32e57..e30266404 100644 --- a/pkg/sentry/fs/tty/slave.go +++ b/pkg/sentry/fs/tty/slave.go @@ -15,14 +15,14 @@ package tty import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // slaveInodeOperations are the fs.InodeOperations for the slave end of the @@ -51,7 +51,7 @@ func newSlaveInode(ctx context.Context, d *dirInodeOperations, t *Terminal, owne t: t, } - return fs.NewInode(iops, d.msrc, fs.StableAttr{ + return fs.NewInode(ctx, iops, d.msrc, fs.StableAttr{ DeviceID: ptsDevice.DeviceID(), // N.B. Linux always uses inode id = tty index + 3. See // fs/devpts/inode.c:devpts_pty_new. @@ -128,7 +128,7 @@ func (sf *slaveFileOperations) Write(ctx context.Context, _ *fs.File, src userme } // Ioctl implements fs.FileOperations.Ioctl. -func (sf *slaveFileOperations) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (sf *slaveFileOperations) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { switch cmd := args[1].Uint(); cmd { case linux.FIONREAD: // linux.FIONREAD == linux.TIOCINQ // Get the number of bytes in the input queue read buffer. diff --git a/pkg/sentry/fs/tty/terminal.go b/pkg/sentry/fs/tty/terminal.go index 2b4160ba5..b7cecb2ed 100644 --- a/pkg/sentry/fs/tty/terminal.go +++ b/pkg/sentry/fs/tty/terminal.go @@ -15,9 +15,9 @@ package tty import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" ) // Terminal is a pseudoterminal. @@ -38,9 +38,11 @@ type Terminal struct { func newTerminal(ctx context.Context, d *dirInodeOperations, n uint32) *Terminal { termios := linux.DefaultSlaveTermios - return &Terminal{ + t := Terminal{ d: d, n: n, ld: newLineDiscipline(termios), } + t.EnableLeakCheck("tty.Terminal") + return &t } diff --git a/pkg/sentry/fs/tty/tty_test.go b/pkg/sentry/fs/tty/tty_test.go index d2e75a511..59f07ff8e 100644 --- a/pkg/sentry/fs/tty/tty_test.go +++ b/pkg/sentry/fs/tty/tty_test.go @@ -17,9 +17,9 @@ package tty import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) func TestSimpleMasterToSlave(t *testing.T) { diff --git a/pkg/sentry/hostcpu/BUILD b/pkg/sentry/hostcpu/BUILD index b5067ae6d..f989f2f8b 100644 --- a/pkg/sentry/hostcpu/BUILD +++ b/pkg/sentry/hostcpu/BUILD @@ -8,7 +8,7 @@ go_library( "getcpu_amd64.s", "hostcpu.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/hostcpu", + importpath = "gvisor.dev/gvisor/pkg/sentry/hostcpu", visibility = ["//:sandbox"], ) diff --git a/pkg/sentry/hostmm/BUILD b/pkg/sentry/hostmm/BUILD index 1a4632a54..67831d5a1 100644 --- a/pkg/sentry/hostmm/BUILD +++ b/pkg/sentry/hostmm/BUILD @@ -8,7 +8,7 @@ go_library( "cgroup.go", "hostmm.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/hostmm", + importpath = "gvisor.dev/gvisor/pkg/sentry/hostmm", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/fd", diff --git a/pkg/sentry/hostmm/hostmm.go b/pkg/sentry/hostmm/hostmm.go index 5432cada9..19335ca73 100644 --- a/pkg/sentry/hostmm/hostmm.go +++ b/pkg/sentry/hostmm/hostmm.go @@ -22,9 +22,9 @@ import ( "path" "syscall" - "gvisor.googlesource.com/gvisor/pkg/fd" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/fd" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // NotifyCurrentMemcgPressureCallback requests that f is called whenever the diff --git a/pkg/sentry/inet/BUILD b/pkg/sentry/inet/BUILD index e288d34e9..184b566d9 100644 --- a/pkg/sentry/inet/BUILD +++ b/pkg/sentry/inet/BUILD @@ -12,6 +12,6 @@ go_library( "inet.go", "test_stack.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/inet", + importpath = "gvisor.dev/gvisor/pkg/sentry/inet", deps = ["//pkg/sentry/context"], ) diff --git a/pkg/sentry/inet/context.go b/pkg/sentry/inet/context.go index 8550c4793..4eda7dd1f 100644 --- a/pkg/sentry/inet/context.go +++ b/pkg/sentry/inet/context.go @@ -15,7 +15,7 @@ package inet import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) // contextID is the inet package's type for context.Context.Value keys. diff --git a/pkg/sentry/inet/inet.go b/pkg/sentry/inet/inet.go index 7c104fd47..5b75a4a06 100644 --- a/pkg/sentry/inet/inet.go +++ b/pkg/sentry/inet/inet.go @@ -49,6 +49,9 @@ type Stack interface { // SetTCPSACKEnabled attempts to change TCP selective acknowledgement // settings. SetTCPSACKEnabled(enabled bool) error + + // Statistics reports stack statistics. + Statistics(stat interface{}, arg string) error } // Interface contains information about a network interface. @@ -102,3 +105,7 @@ type TCPBufferSize struct { // Max is the maximum size. Max int } + +// StatDev describes one line of /proc/net/dev, i.e., stats for one network +// interface. +type StatDev [16]uint64 diff --git a/pkg/sentry/inet/test_stack.go b/pkg/sentry/inet/test_stack.go index 624371eb6..75f9e7a77 100644 --- a/pkg/sentry/inet/test_stack.go +++ b/pkg/sentry/inet/test_stack.go @@ -81,3 +81,8 @@ func (s *TestStack) SetTCPSACKEnabled(enabled bool) error { s.TCPSACKFlag = enabled return nil } + +// Statistics implements inet.Stack.Statistics. +func (s *TestStack) Statistics(stat interface{}, arg string) error { + return nil +} diff --git a/pkg/sentry/kernel/BUILD b/pkg/sentry/kernel/BUILD index 04e375910..e61d39c82 100644 --- a/pkg/sentry/kernel/BUILD +++ b/pkg/sentry/kernel/BUILD @@ -31,7 +31,7 @@ go_template_instance( go_template_instance( name = "seqatomic_taskgoroutineschedinfo", - out = "seqatomic_taskgoroutineschedinfo.go", + out = "seqatomic_taskgoroutineschedinfo_unsafe.go", package = "kernel", suffix = "TaskGoroutineSchedInfo", template = "//third_party/gvsync:generic_seqatomic", @@ -85,7 +85,7 @@ proto_library( go_proto_library( name = "uncaught_signal_go_proto", - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/uncaught_signal_go_proto", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/uncaught_signal_go_proto", proto = ":uncaught_signal_proto", visibility = ["//visibility:public"], deps = ["//pkg/sentry/arch:registers_go_proto"], @@ -96,7 +96,8 @@ go_library( srcs = [ "abstract_socket_namespace.go", "context.go", - "fd_map.go", + "fd_table.go", + "fd_table_unsafe.go", "fs_context.go", "ipc_namespace.go", "kernel.go", @@ -111,7 +112,7 @@ go_library( "ptrace_arm64.go", "rseq.go", "seccomp.go", - "seqatomic_taskgoroutineschedinfo.go", + "seqatomic_taskgoroutineschedinfo_unsafe.go", "session_list.go", "sessions.go", "signal.go", @@ -147,11 +148,11 @@ go_library( "vdso.go", "version.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel", imports = [ - "gvisor.googlesource.com/gvisor/pkg/bpf", - "gvisor.googlesource.com/gvisor/pkg/sentry/device", - "gvisor.googlesource.com/gvisor/pkg/tcpip", + "gvisor.dev/gvisor/pkg/bpf", + "gvisor.dev/gvisor/pkg/sentry/device", + "gvisor.dev/gvisor/pkg/tcpip", ], visibility = ["//:sandbox"], deps = [ @@ -179,7 +180,6 @@ go_library( "//pkg/sentry/kernel/auth", "//pkg/sentry/kernel/epoll", "//pkg/sentry/kernel/futex", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/sched", "//pkg/sentry/kernel/semaphore", "//pkg/sentry/kernel/shm", @@ -214,7 +214,7 @@ go_test( name = "kernel_test", size = "small", srcs = [ - "fd_map_test.go", + "fd_table_test.go", "table_test.go", "task_test.go", "timekeeper_test.go", @@ -223,9 +223,10 @@ go_test( deps = [ "//pkg/abi", "//pkg/sentry/arch", + "//pkg/sentry/context", "//pkg/sentry/context/contexttest", + "//pkg/sentry/fs", "//pkg/sentry/fs/filetest", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/sched", "//pkg/sentry/limits", "//pkg/sentry/pgalloc", diff --git a/pkg/sentry/kernel/abstract_socket_namespace.go b/pkg/sentry/kernel/abstract_socket_namespace.go index 5ce52e66c..244655b5c 100644 --- a/pkg/sentry/kernel/abstract_socket_namespace.go +++ b/pkg/sentry/kernel/abstract_socket_namespace.go @@ -18,8 +18,8 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" ) // +stateify savable diff --git a/pkg/sentry/kernel/auth/BUILD b/pkg/sentry/kernel/auth/BUILD index abd4f2dae..1d00a6310 100644 --- a/pkg/sentry/kernel/auth/BUILD +++ b/pkg/sentry/kernel/auth/BUILD @@ -4,6 +4,17 @@ load("//tools/go_generics:defs.bzl", "go_template_instance") load("//tools/go_stateify:defs.bzl", "go_library") go_template_instance( + name = "atomicptr_credentials", + out = "atomicptr_credentials_unsafe.go", + package = "auth", + suffix = "Credentials", + template = "//third_party/gvsync:generic_atomicptr", + types = { + "Value": "Credentials", + }, +) + +go_template_instance( name = "id_map_range", out = "id_map_range.go", package = "auth", @@ -34,6 +45,7 @@ go_template_instance( go_library( name = "auth", srcs = [ + "atomicptr_credentials_unsafe.go", "auth.go", "capability_set.go", "context.go", @@ -45,7 +57,7 @@ go_library( "id_map_set.go", "user_namespace.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/auth", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/kernel/auth/capability_set.go b/pkg/sentry/kernel/auth/capability_set.go index 7a0c967cd..fc8c6745c 100644 --- a/pkg/sentry/kernel/auth/capability_set.go +++ b/pkg/sentry/kernel/auth/capability_set.go @@ -15,8 +15,8 @@ package auth import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/bits" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/bits" ) // A CapabilitySet is a set of capabilities implemented as a bitset. The zero @@ -24,7 +24,7 @@ import ( type CapabilitySet uint64 // AllCapabilities is a CapabilitySet containing all valid capabilities. -var AllCapabilities = CapabilitySetOf(linux.MaxCapability+1) - 1 +var AllCapabilities = CapabilitySetOf(linux.CAP_LAST_CAP+1) - 1 // CapabilitySetOf returns a CapabilitySet containing only the given // capability. diff --git a/pkg/sentry/kernel/auth/context.go b/pkg/sentry/kernel/auth/context.go index 16d110610..5c0e7d6b6 100644 --- a/pkg/sentry/kernel/auth/context.go +++ b/pkg/sentry/kernel/auth/context.go @@ -15,7 +15,7 @@ package auth import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) // contextID is the auth package's type for context.Context.Value keys. diff --git a/pkg/sentry/kernel/auth/credentials.go b/pkg/sentry/kernel/auth/credentials.go index 1511a0324..e057d2c6d 100644 --- a/pkg/sentry/kernel/auth/credentials.go +++ b/pkg/sentry/kernel/auth/credentials.go @@ -15,8 +15,8 @@ package auth import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/syserror" ) // Credentials contains information required to authorize privileged operations diff --git a/pkg/sentry/kernel/auth/id_map.go b/pkg/sentry/kernel/auth/id_map.go index e5d6028d6..3d74bc610 100644 --- a/pkg/sentry/kernel/auth/id_map.go +++ b/pkg/sentry/kernel/auth/id_map.go @@ -15,9 +15,9 @@ package auth import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/syserror" ) // MapFromKUID translates kuid, a UID in the root namespace, to a UID in ns. diff --git a/pkg/sentry/kernel/auth/user_namespace.go b/pkg/sentry/kernel/auth/user_namespace.go index a40dd668f..af28ccc65 100644 --- a/pkg/sentry/kernel/auth/user_namespace.go +++ b/pkg/sentry/kernel/auth/user_namespace.go @@ -18,7 +18,7 @@ import ( "math" "sync" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/syserror" ) // A UserNamespace represents a user namespace. See user_namespaces(7) for diff --git a/pkg/sentry/kernel/context.go b/pkg/sentry/kernel/context.go index a1a084eab..e3f5b0d83 100644 --- a/pkg/sentry/kernel/context.go +++ b/pkg/sentry/kernel/context.go @@ -15,8 +15,8 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" ) // contextID is the kernel package's type for context.Context.Value keys. diff --git a/pkg/sentry/kernel/contexttest/BUILD b/pkg/sentry/kernel/contexttest/BUILD index bfb2a0b73..bec13a3d9 100644 --- a/pkg/sentry/kernel/contexttest/BUILD +++ b/pkg/sentry/kernel/contexttest/BUILD @@ -6,7 +6,7 @@ go_library( name = "contexttest", testonly = 1, srcs = ["contexttest.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/contexttest", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/contexttest", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/sentry/context", diff --git a/pkg/sentry/kernel/contexttest/contexttest.go b/pkg/sentry/kernel/contexttest/contexttest.go index ae67e2a25..82f9d8922 100644 --- a/pkg/sentry/kernel/contexttest/contexttest.go +++ b/pkg/sentry/kernel/contexttest/contexttest.go @@ -19,11 +19,11 @@ package contexttest import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" ) // Context returns a Context that may be used in tests. Uses ptrace as the diff --git a/pkg/sentry/kernel/epoll/BUILD b/pkg/sentry/kernel/epoll/BUILD index 3ac59e13e..f46c43128 100644 --- a/pkg/sentry/kernel/epoll/BUILD +++ b/pkg/sentry/kernel/epoll/BUILD @@ -22,7 +22,7 @@ go_library( "epoll_list.go", "epoll_state.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/epoll", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/epoll", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/refs", @@ -30,7 +30,6 @@ go_library( "//pkg/sentry/fs", "//pkg/sentry/fs/anon", "//pkg/sentry/fs/fsutil", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/usermem", "//pkg/waiter", ], diff --git a/pkg/sentry/kernel/epoll/epoll.go b/pkg/sentry/kernel/epoll/epoll.go index 43ae22a5d..9c0a4e1b4 100644 --- a/pkg/sentry/kernel/epoll/epoll.go +++ b/pkg/sentry/kernel/epoll/epoll.go @@ -21,14 +21,13 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/anon" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/anon" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/waiter" ) // Event describes the event mask that was observed and the user data to be @@ -61,7 +60,7 @@ const ( // +stateify savable type FileIdentifier struct { File *fs.File `state:"wait"` - Fd kdefs.FD + Fd int32 } // pollEntry holds all the state associated with an event poll entry, that is, @@ -155,7 +154,7 @@ var cycleMu sync.Mutex // NewEventPoll allocates and initializes a new event poll object. func NewEventPoll(ctx context.Context) *fs.File { // name matches fs/eventpoll.c:epoll_create1. - dirent := fs.NewDirent(anon.NewInode(ctx), fmt.Sprintf("anon_inode:[eventpoll]")) + dirent := fs.NewDirent(ctx, anon.NewInode(ctx), fmt.Sprintf("anon_inode:[eventpoll]")) // Release the initial dirent reference after NewFile takes a reference. defer dirent.DecRef() return fs.NewFile(ctx, dirent, fs.FileFlags{}, &EventPoll{ diff --git a/pkg/sentry/kernel/epoll/epoll_state.go b/pkg/sentry/kernel/epoll/epoll_state.go index 4c3c38f9e..a0d35d350 100644 --- a/pkg/sentry/kernel/epoll/epoll_state.go +++ b/pkg/sentry/kernel/epoll/epoll_state.go @@ -15,8 +15,8 @@ package epoll import ( - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/waiter" ) // afterLoad is invoked by stateify. diff --git a/pkg/sentry/kernel/epoll/epoll_test.go b/pkg/sentry/kernel/epoll/epoll_test.go index 49b781b69..4a20d4c82 100644 --- a/pkg/sentry/kernel/epoll/epoll_test.go +++ b/pkg/sentry/kernel/epoll/epoll_test.go @@ -17,9 +17,9 @@ package epoll import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/filetest" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs/filetest" + "gvisor.dev/gvisor/pkg/waiter" ) func TestFileDestroyed(t *testing.T) { diff --git a/pkg/sentry/kernel/eventfd/BUILD b/pkg/sentry/kernel/eventfd/BUILD index f2f1a1223..1c5f979d4 100644 --- a/pkg/sentry/kernel/eventfd/BUILD +++ b/pkg/sentry/kernel/eventfd/BUILD @@ -5,7 +5,7 @@ load("//tools/go_stateify:defs.bzl", "go_library", "go_test") go_library( name = "eventfd", srcs = ["eventfd.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/eventfd", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/eventfd", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/kernel/eventfd/eventfd.go b/pkg/sentry/kernel/eventfd/eventfd.go index fe474cbf0..12f0d429b 100644 --- a/pkg/sentry/kernel/eventfd/eventfd.go +++ b/pkg/sentry/kernel/eventfd/eventfd.go @@ -21,15 +21,15 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/fdnotifier" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/anon" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/anon" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // EventOperations represents an event with the semantics of Linux's file-based event @@ -68,7 +68,7 @@ type EventOperations struct { // New creates a new event object with the supplied initial value and mode. func New(ctx context.Context, initVal uint64, semMode bool) *fs.File { // name matches fs/eventfd.c:eventfd_file_create. - dirent := fs.NewDirent(anon.NewInode(ctx), "anon_inode:[eventfd]") + dirent := fs.NewDirent(ctx, anon.NewInode(ctx), "anon_inode:[eventfd]") // Release the initial dirent reference after NewFile takes a reference. defer dirent.DecRef() return fs.NewFile(ctx, dirent, fs.FileFlags{Read: true, Write: true}, &EventOperations{ diff --git a/pkg/sentry/kernel/eventfd/eventfd_test.go b/pkg/sentry/kernel/eventfd/eventfd_test.go index 1159638e5..018c7f3ef 100644 --- a/pkg/sentry/kernel/eventfd/eventfd_test.go +++ b/pkg/sentry/kernel/eventfd/eventfd_test.go @@ -17,9 +17,9 @@ package eventfd import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/waiter" ) func TestEventfd(t *testing.T) { diff --git a/pkg/sentry/kernel/fasync/BUILD b/pkg/sentry/kernel/fasync/BUILD index 59b4a49e1..5eddca115 100644 --- a/pkg/sentry/kernel/fasync/BUILD +++ b/pkg/sentry/kernel/fasync/BUILD @@ -5,7 +5,7 @@ load("//tools/go_stateify:defs.bzl", "go_library") go_library( name = "fasync", srcs = ["fasync.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/fasync", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/fasync", visibility = ["//:sandbox"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/kernel/fasync/fasync.go b/pkg/sentry/kernel/fasync/fasync.go index 84cd08501..6b0bb0324 100644 --- a/pkg/sentry/kernel/fasync/fasync.go +++ b/pkg/sentry/kernel/fasync/fasync.go @@ -18,11 +18,11 @@ package fasync import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/waiter" ) // New creates a new FileAsync. @@ -34,9 +34,23 @@ func New() fs.FileAsync { // // +stateify savable type FileAsync struct { - mu sync.Mutex `state:"nosave"` - e waiter.Entry - requester *auth.Credentials + // e is immutable after first use (which is protected by mu below). + e waiter.Entry + + // regMu protects registeration and unregistration actions on e. + // + // regMu must be held while registration decisions are being made + // through the registration action itself. + // + // Lock ordering: regMu, mu. + regMu sync.Mutex `state:"nosave"` + + // mu protects all following fields. + // + // Lock ordering: e.mu, mu. + mu sync.Mutex `state:"nosave"` + requester *auth.Credentials + registered bool // Only one of the following is allowed to be non-nil. recipientPG *kernel.ProcessGroup @@ -47,7 +61,7 @@ type FileAsync struct { // Callback sends a signal. func (a *FileAsync) Callback(e *waiter.Entry) { a.mu.Lock() - if a.e.Callback == nil { + if !a.registered { a.mu.Unlock() return } @@ -80,14 +94,21 @@ func (a *FileAsync) Callback(e *waiter.Entry) { // // The file must not be currently registered. func (a *FileAsync) Register(w waiter.Waitable) { + a.regMu.Lock() + defer a.regMu.Unlock() a.mu.Lock() - defer a.mu.Unlock() - if a.e.Callback != nil { + if a.registered { + a.mu.Unlock() panic("registering already registered file") } - a.e.Callback = a + if a.e.Callback == nil { + a.e.Callback = a + } + a.registered = true + + a.mu.Unlock() w.EventRegister(&a.e, waiter.EventIn|waiter.EventOut|waiter.EventErr|waiter.EventHUp) } @@ -95,15 +116,19 @@ func (a *FileAsync) Register(w waiter.Waitable) { // // The file must be currently registered. func (a *FileAsync) Unregister(w waiter.Waitable) { + a.regMu.Lock() + defer a.regMu.Unlock() a.mu.Lock() - defer a.mu.Unlock() - if a.e.Callback == nil { + if !a.registered { + a.mu.Unlock() panic("unregistering unregistered file") } + a.registered = false + + a.mu.Unlock() w.EventUnregister(&a.e) - a.e.Callback = nil } // Owner returns who is currently getting signals. All return values will be diff --git a/pkg/sentry/kernel/fd_map.go b/pkg/sentry/kernel/fd_map.go deleted file mode 100644 index c5636d233..000000000 --- a/pkg/sentry/kernel/fd_map.go +++ /dev/null @@ -1,364 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package kernel - -import ( - "bytes" - "fmt" - "sort" - "sync" - "sync/atomic" - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/lock" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" -) - -// FDs is an ordering of FD's that can be made stable. -type FDs []kdefs.FD - -func (f FDs) Len() int { - return len(f) -} - -func (f FDs) Swap(i, j int) { - f[i], f[j] = f[j], f[i] -} - -func (f FDs) Less(i, j int) bool { - return f[i] < f[j] -} - -// FDFlags define flags for an individual descriptor. -// -// +stateify savable -type FDFlags struct { - // CloseOnExec indicates the descriptor should be closed on exec. - CloseOnExec bool -} - -// ToLinuxFileFlags converts a kernel.FDFlags object to a Linux file flags -// representation. -func (f FDFlags) ToLinuxFileFlags() (mask uint) { - if f.CloseOnExec { - mask |= linux.O_CLOEXEC - } - return -} - -// ToLinuxFDFlags converts a kernel.FDFlags object to a Linux descriptor flags -// representation. -func (f FDFlags) ToLinuxFDFlags() (mask uint) { - if f.CloseOnExec { - mask |= linux.FD_CLOEXEC - } - return -} - -// descriptor holds the details about a file descriptor, namely a pointer the -// file itself and the descriptor flags. -// -// +stateify savable -type descriptor struct { - file *fs.File - flags FDFlags -} - -// FDMap is used to manage File references and flags. -// -// +stateify savable -type FDMap struct { - refs.AtomicRefCount - k *Kernel - files map[kdefs.FD]descriptor - mu sync.RWMutex `state:"nosave"` - uid uint64 -} - -// ID returns a unique identifier for this FDMap. -func (f *FDMap) ID() uint64 { - return f.uid -} - -// NewFDMap allocates a new FDMap that may be used by tasks in k. -func (k *Kernel) NewFDMap() *FDMap { - return &FDMap{ - k: k, - files: make(map[kdefs.FD]descriptor), - uid: atomic.AddUint64(&k.fdMapUids, 1), - } -} - -// destroy removes all of the file descriptors from the map. -func (f *FDMap) destroy() { - f.RemoveIf(func(*fs.File, FDFlags) bool { - return true - }) -} - -// DecRef implements RefCounter.DecRef with destructor f.destroy. -func (f *FDMap) DecRef() { - f.DecRefWithDestructor(f.destroy) -} - -// Size returns the number of file descriptor slots currently allocated. -func (f *FDMap) Size() int { - f.mu.RLock() - defer f.mu.RUnlock() - - return len(f.files) -} - -// String is a stringer for FDMap. -func (f *FDMap) String() string { - f.mu.RLock() - defer f.mu.RUnlock() - - var b bytes.Buffer - for k, v := range f.files { - n, _ := v.file.Dirent.FullName(nil /* root */) - b.WriteString(fmt.Sprintf("\tfd:%d => name %s\n", k, n)) - } - return b.String() -} - -// NewFDFrom allocates a new FD guaranteed to be the lowest number available -// greater than or equal to from. This property is important as Unix programs -// tend to count on this allocation order. -func (f *FDMap) NewFDFrom(fd kdefs.FD, file *fs.File, flags FDFlags, limitSet *limits.LimitSet) (kdefs.FD, error) { - if fd < 0 { - // Don't accept negative FDs. - return 0, syscall.EINVAL - } - - f.mu.Lock() - defer f.mu.Unlock() - - // Finds the lowest fd not in the handles map. - lim := limitSet.Get(limits.NumberOfFiles) - for i := fd; lim.Cur == limits.Infinity || i < kdefs.FD(lim.Cur); i++ { - if _, ok := f.files[i]; !ok { - file.IncRef() - f.files[i] = descriptor{file, flags} - return i, nil - } - } - - return -1, syscall.EMFILE -} - -// NewFDAt sets the file reference for the given FD. If there is an -// active reference for that FD, the ref count for that existing reference -// is decremented. -func (f *FDMap) NewFDAt(fd kdefs.FD, file *fs.File, flags FDFlags, limitSet *limits.LimitSet) error { - if fd < 0 { - // Don't accept negative FDs. - return syscall.EBADF - } - - // In this one case we do not do a defer of the Unlock. The - // reason is that we must have done all the work needed for - // discarding any old open file before we return to the - // caller. In other words, the DecRef(), below, must have - // completed by the time we return to the caller to ensure - // side effects are, in fact, effected. A classic example is - // dup2(fd1, fd2); if fd2 was already open, it must be closed, - // and we don't want to resume the caller until it is; we have - // to block on the DecRef(). Hence we can not just do a 'go - // oldfile.DecRef()', since there would be no guarantee that - // it would be done before we the caller resumed. Since we - // must wait for the DecRef() to finish, and that could take - // time, it's best to first call f.muUnlock beore so we are - // not blocking other uses of this FDMap on the DecRef() call. - f.mu.Lock() - oldDesc, oldExists := f.files[fd] - lim := limitSet.Get(limits.NumberOfFiles).Cur - // if we're closing one then the effective limit is one - // more than the actual limit. - if oldExists && lim != limits.Infinity { - lim++ - } - if lim != limits.Infinity && fd >= kdefs.FD(lim) { - f.mu.Unlock() - return syscall.EMFILE - } - - file.IncRef() - f.files[fd] = descriptor{file, flags} - f.mu.Unlock() - - if oldExists { - oldDesc.file.DecRef() - } - return nil -} - -// SetFlags sets the flags for the given file descriptor, if it is valid. -func (f *FDMap) SetFlags(fd kdefs.FD, flags FDFlags) { - f.mu.Lock() - defer f.mu.Unlock() - - desc, ok := f.files[fd] - if !ok { - return - } - - f.files[fd] = descriptor{desc.file, flags} -} - -// GetDescriptor returns a reference to the file and the flags for the FD. It -// bumps its reference count as well. It returns nil if there is no File -// for the FD, i.e. if the FD is invalid. The caller must use DecRef -// when they are done. -func (f *FDMap) GetDescriptor(fd kdefs.FD) (*fs.File, FDFlags) { - f.mu.RLock() - defer f.mu.RUnlock() - - if desc, ok := f.files[fd]; ok { - desc.file.IncRef() - return desc.file, desc.flags - } - return nil, FDFlags{} -} - -// GetFile returns a reference to the File for the FD and bumps -// its reference count as well. It returns nil if there is no File -// for the FD, i.e. if the FD is invalid. The caller must use DecRef -// when they are done. -func (f *FDMap) GetFile(fd kdefs.FD) *fs.File { - f.mu.RLock() - if desc, ok := f.files[fd]; ok { - desc.file.IncRef() - f.mu.RUnlock() - return desc.file - } - f.mu.RUnlock() - return nil -} - -// fds returns an ordering of FDs. -func (f *FDMap) fds() FDs { - fds := make(FDs, 0, len(f.files)) - for fd := range f.files { - fds = append(fds, fd) - } - sort.Sort(fds) - return fds -} - -// GetFDs returns a list of valid fds. -func (f *FDMap) GetFDs() FDs { - f.mu.RLock() - defer f.mu.RUnlock() - return f.fds() -} - -// GetRefs returns a stable slice of references to all files and bumps the -// reference count on each. The caller must use DecRef on each reference when -// they're done using the slice. -func (f *FDMap) GetRefs() []*fs.File { - f.mu.RLock() - defer f.mu.RUnlock() - - fds := f.fds() - fs := make([]*fs.File, 0, len(fds)) - for _, fd := range fds { - desc := f.files[fd] - desc.file.IncRef() - fs = append(fs, desc.file) - } - return fs -} - -// Fork returns an independent FDMap pointing to the same descriptors. -func (f *FDMap) Fork() *FDMap { - f.mu.RLock() - defer f.mu.RUnlock() - - clone := f.k.NewFDMap() - - // Grab a extra reference for every file. - for fd, desc := range f.files { - desc.file.IncRef() - clone.files[fd] = desc - } - - // That's it! - return clone -} - -// unlock releases all file locks held by this FDMap's uid. Must only be -// called on a non-nil *fs.File. -func (f *FDMap) unlock(file *fs.File) { - id := lock.UniqueID(f.ID()) - file.Dirent.Inode.LockCtx.Posix.UnlockRegion(id, lock.LockRange{0, lock.LockEOF}) -} - -// inotifyFileClose generates the appropriate inotify events for f being closed. -func inotifyFileClose(f *fs.File) { - var ev uint32 - d := f.Dirent - - if fs.IsDir(d.Inode.StableAttr) { - ev |= linux.IN_ISDIR - } - - if f.Flags().Write { - ev |= linux.IN_CLOSE_WRITE - } else { - ev |= linux.IN_CLOSE_NOWRITE - } - - d.InotifyEvent(ev, 0) -} - -// Remove removes an FD from the FDMap, and returns (File, true) if a File -// one was found. Callers are expected to decrement the reference count on -// the File. Otherwise returns (nil, false). -func (f *FDMap) Remove(fd kdefs.FD) (*fs.File, bool) { - f.mu.Lock() - desc := f.files[fd] - delete(f.files, fd) - f.mu.Unlock() - if desc.file != nil { - f.unlock(desc.file) - inotifyFileClose(desc.file) - return desc.file, true - } - return nil, false -} - -// RemoveIf removes all FDs where cond is true. -func (f *FDMap) RemoveIf(cond func(*fs.File, FDFlags) bool) { - var removed []*fs.File - f.mu.Lock() - for fd, desc := range f.files { - if desc.file != nil && cond(desc.file, desc.flags) { - delete(f.files, fd) - removed = append(removed, desc.file) - } - } - f.mu.Unlock() - - for _, file := range removed { - f.unlock(file) - inotifyFileClose(file) - file.DecRef() - } -} diff --git a/pkg/sentry/kernel/fd_map_test.go b/pkg/sentry/kernel/fd_map_test.go deleted file mode 100644 index 22db4c7cf..000000000 --- a/pkg/sentry/kernel/fd_map_test.go +++ /dev/null @@ -1,136 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package kernel - -import ( - "testing" - - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/filetest" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" -) - -const ( - // maxFD is the maximum FD to try to create in the map. - // This number of open files has been seen in the wild. - maxFD = 2 * 1024 -) - -func newTestFDMap() *FDMap { - return &FDMap{ - files: make(map[kdefs.FD]descriptor), - } -} - -// TestFDMapMany allocates maxFD FDs, i.e. maxes out the FDMap, -// until there is no room, then makes sure that NewFDAt works -// and also that if we remove one and add one that works too. -func TestFDMapMany(t *testing.T) { - file := filetest.NewTestFile(t) - limitSet := limits.NewLimitSet() - limitSet.Set(limits.NumberOfFiles, limits.Limit{maxFD, maxFD}, true /* privileged */) - - f := newTestFDMap() - for i := 0; i < maxFD; i++ { - if _, err := f.NewFDFrom(0, file, FDFlags{}, limitSet); err != nil { - t.Fatalf("Allocated %v FDs but wanted to allocate %v", i, maxFD) - } - } - - if _, err := f.NewFDFrom(0, file, FDFlags{}, limitSet); err == nil { - t.Fatalf("f.NewFDFrom(0, r) in full map: got nil, wanted error") - } - - if err := f.NewFDAt(1, file, FDFlags{}, limitSet); err != nil { - t.Fatalf("f.NewFDAt(1, r, FDFlags{}): got %v, wanted nil", err) - } -} - -// TestFDMap does a set of simple tests to make sure simple adds, -// removes, GetRefs, and DecRefs work. The ordering is just weird -// enough that a table-driven approach seemed clumsy. -func TestFDMap(t *testing.T) { - file := filetest.NewTestFile(t) - limitSet := limits.NewLimitSet() - limitSet.Set(limits.NumberOfFiles, limits.Limit{1, maxFD}, true /* privileged */) - - f := newTestFDMap() - if _, err := f.NewFDFrom(0, file, FDFlags{}, limitSet); err != nil { - t.Fatalf("Adding an FD to an empty 1-size map: got %v, want nil", err) - } - - if _, err := f.NewFDFrom(0, file, FDFlags{}, limitSet); err == nil { - t.Fatalf("Adding an FD to a filled 1-size map: got nil, wanted an error") - } - - largeLimit := limits.Limit{maxFD, maxFD} - limitSet.Set(limits.NumberOfFiles, largeLimit, true /* privileged */) - - if fd, err := f.NewFDFrom(0, file, FDFlags{}, limitSet); err != nil { - t.Fatalf("Adding an FD to a resized map: got %v, want nil", err) - } else if fd != kdefs.FD(1) { - t.Fatalf("Added an FD to a resized map: got %v, want 1", fd) - } - - if err := f.NewFDAt(1, file, FDFlags{}, limitSet); err != nil { - t.Fatalf("Replacing FD 1 via f.NewFDAt(1, r, FDFlags{}): got %v, wanted nil", err) - } - - if err := f.NewFDAt(maxFD+1, file, FDFlags{}, limitSet); err == nil { - t.Fatalf("Using an FD that was too large via f.NewFDAt(%v, r, FDFlags{}): got nil, wanted an error", maxFD+1) - } - - if ref := f.GetFile(1); ref == nil { - t.Fatalf("f.GetFile(1): got nil, wanted %v", file) - } - - if ref := f.GetFile(2); ref != nil { - t.Fatalf("f.GetFile(2): got a %v, wanted nil", ref) - } - - ref, ok := f.Remove(1) - if !ok { - t.Fatalf("f.Remove(1) for an existing FD: failed, want success") - } - ref.DecRef() - - if ref, ok := f.Remove(1); ok { - ref.DecRef() - t.Fatalf("r.Remove(1) for a removed FD: got success, want failure") - } - -} - -func TestDescriptorFlags(t *testing.T) { - file := filetest.NewTestFile(t) - f := newTestFDMap() - limitSet := limits.NewLimitSet() - limitSet.Set(limits.NumberOfFiles, limits.Limit{maxFD, maxFD}, true /* privileged */) - - origFlags := FDFlags{CloseOnExec: true} - - if err := f.NewFDAt(2, file, origFlags, limitSet); err != nil { - t.Fatalf("f.NewFDAt(2, r, FDFlags{}): got %v, wanted nil", err) - } - - newFile, newFlags := f.GetDescriptor(2) - if newFile == nil { - t.Fatalf("f.GetFile(2): got a %v, wanted nil", newFile) - } - - if newFlags != origFlags { - t.Fatalf("new File flags %+v don't match original %+v", newFlags, origFlags) - } -} diff --git a/pkg/sentry/kernel/fd_table.go b/pkg/sentry/kernel/fd_table.go new file mode 100644 index 000000000..cc3f43a45 --- /dev/null +++ b/pkg/sentry/kernel/fd_table.go @@ -0,0 +1,382 @@ +// Copyright 2018 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package kernel + +import ( + "bytes" + "fmt" + "math" + "sync" + "sync/atomic" + "syscall" + + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/lock" + "gvisor.dev/gvisor/pkg/sentry/limits" +) + +// FDFlags define flags for an individual descriptor. +// +// +stateify savable +type FDFlags struct { + // CloseOnExec indicates the descriptor should be closed on exec. + CloseOnExec bool +} + +// ToLinuxFileFlags converts a kernel.FDFlags object to a Linux file flags +// representation. +func (f FDFlags) ToLinuxFileFlags() (mask uint) { + if f.CloseOnExec { + mask |= linux.O_CLOEXEC + } + return +} + +// ToLinuxFDFlags converts a kernel.FDFlags object to a Linux descriptor flags +// representation. +func (f FDFlags) ToLinuxFDFlags() (mask uint) { + if f.CloseOnExec { + mask |= linux.FD_CLOEXEC + } + return +} + +// descriptor holds the details about a file descriptor, namely a pointer to +// the file itself and the descriptor flags. +// +// Note that this is immutable and can only be changed via operations on the +// descriptorTable. +// +// +stateify savable +type descriptor struct { + file *fs.File + flags FDFlags +} + +// FDTable is used to manage File references and flags. +// +// +stateify savable +type FDTable struct { + refs.AtomicRefCount + k *Kernel + + // uid is a unique identifier. + uid uint64 + + // mu protects below. + mu sync.Mutex `state:"nosave"` + + // used contains the number of non-nil entries. It must be accessed + // atomically. It may be read atomically without holding mu (but not + // written). + used int32 + + // descriptorTable holds descriptors. + descriptorTable `state:".(map[int32]descriptor)"` +} + +func (f *FDTable) saveDescriptorTable() map[int32]descriptor { + m := make(map[int32]descriptor) + f.forEach(func(fd int32, file *fs.File, flags FDFlags) { + m[fd] = descriptor{ + file: file, + flags: flags, + } + }) + return m +} + +func (f *FDTable) loadDescriptorTable(m map[int32]descriptor) { + f.init() // Initialize table. + for fd, d := range m { + f.set(fd, d.file, d.flags) + + // Note that we do _not_ need to acquire a extra table + // reference here. The table reference will already be + // accounted for in the file, so we drop the reference taken by + // set above. + d.file.DecRef() + } +} + +// drop drops the table reference. +func (f *FDTable) drop(file *fs.File) { + // Release locks. + file.Dirent.Inode.LockCtx.Posix.UnlockRegion(lock.UniqueID(f.uid), lock.LockRange{0, lock.LockEOF}) + + // Send inotify events. + d := file.Dirent + var ev uint32 + if fs.IsDir(d.Inode.StableAttr) { + ev |= linux.IN_ISDIR + } + if file.Flags().Write { + ev |= linux.IN_CLOSE_WRITE + } else { + ev |= linux.IN_CLOSE_NOWRITE + } + d.InotifyEvent(ev, 0) + + // Drop the table reference. + file.DecRef() +} + +// ID returns a unique identifier for this FDTable. +func (f *FDTable) ID() uint64 { + return f.uid +} + +// NewFDTable allocates a new FDTable that may be used by tasks in k. +func (k *Kernel) NewFDTable() *FDTable { + f := &FDTable{ + k: k, + uid: atomic.AddUint64(&k.fdMapUids, 1), + } + f.init() + return f +} + +// destroy removes all of the file descriptors from the map. +func (f *FDTable) destroy() { + f.RemoveIf(func(*fs.File, FDFlags) bool { + return true + }) +} + +// DecRef implements RefCounter.DecRef with destructor f.destroy. +func (f *FDTable) DecRef() { + f.DecRefWithDestructor(f.destroy) +} + +// Size returns the number of file descriptor slots currently allocated. +func (f *FDTable) Size() int { + size := atomic.LoadInt32(&f.used) + return int(size) +} + +// forEach iterates over all non-nil files. +// +// It is the caller's responsibility to acquire an appropriate lock. +func (f *FDTable) forEach(fn func(fd int32, file *fs.File, flags FDFlags)) { + fd := int32(0) + for { + file, flags, ok := f.get(fd) + if !ok { + break + } + if file != nil { + if !file.TryIncRef() { + continue // Race caught. + } + fn(int32(fd), file, flags) + file.DecRef() + } + fd++ + } +} + +// String is a stringer for FDTable. +func (f *FDTable) String() string { + var b bytes.Buffer + f.forEach(func(fd int32, file *fs.File, flags FDFlags) { + n, _ := file.Dirent.FullName(nil /* root */) + b.WriteString(fmt.Sprintf("\tfd:%d => name %s\n", fd, n)) + }) + return b.String() +} + +// NewFDs allocates new FDs guaranteed to be the lowest number available +// greater than or equal to the fd parameter. All files will share the set +// flags. Success is guaranteed to be all or none. +func (f *FDTable) NewFDs(ctx context.Context, fd int32, files []*fs.File, flags FDFlags) (fds []int32, err error) { + if fd < 0 { + // Don't accept negative FDs. + return nil, syscall.EINVAL + } + + // Default limit. + end := int32(math.MaxInt32) + + // Ensure we don't get past the provided limit. + if limitSet := limits.FromContext(ctx); limitSet != nil { + lim := limitSet.Get(limits.NumberOfFiles) + if lim.Cur != limits.Infinity { + end = int32(lim.Cur) + } + if fd >= end { + return nil, syscall.EMFILE + } + } + + f.mu.Lock() + defer f.mu.Unlock() + + // Install all entries. + for i := fd; i < end && len(fds) < len(files); i++ { + if d, _, _ := f.get(i); d == nil { + f.set(i, files[len(fds)], flags) // Set the descriptor. + fds = append(fds, i) // Record the file descriptor. + } + } + + // Failure? Unwind existing FDs. + if len(fds) < len(files) { + for _, i := range fds { + f.set(i, nil, FDFlags{}) // Zap entry. + } + return nil, syscall.EMFILE + } + + return fds, nil +} + +// NewFDAt sets the file reference for the given FD. If there is an active +// reference for that FD, the ref count for that existing reference is +// decremented. +func (f *FDTable) NewFDAt(ctx context.Context, fd int32, file *fs.File, flags FDFlags) error { + if fd < 0 { + // Don't accept negative FDs. + return syscall.EBADF + } + + f.mu.Lock() + defer f.mu.Unlock() + + // Check the limit for the provided file. + if limitSet := limits.FromContext(ctx); limitSet != nil { + if lim := limitSet.Get(limits.NumberOfFiles); lim.Cur != limits.Infinity && uint64(fd) >= lim.Cur { + return syscall.EMFILE + } + } + + // Install the entry. + f.set(fd, file, flags) + return nil +} + +// SetFlags sets the flags for the given file descriptor. +// +// True is returned iff flags were changed. +func (f *FDTable) SetFlags(fd int32, flags FDFlags) error { + if fd < 0 { + // Don't accept negative FDs. + return syscall.EBADF + } + + f.mu.Lock() + defer f.mu.Unlock() + + file, _, _ := f.get(fd) + if file == nil { + // No file found. + return syscall.EBADF + } + + // Update the flags. + f.set(fd, file, flags) + return nil +} + +// Get returns a reference to the file and the flags for the FD or nil if no +// file is defined for the given fd. +// +// N.B. Callers are required to use DecRef when they are done. +// +//go:nosplit +func (f *FDTable) Get(fd int32) (*fs.File, FDFlags) { + if fd < 0 { + return nil, FDFlags{} + } + + for { + file, flags, _ := f.get(fd) + if file != nil { + if !file.TryIncRef() { + continue // Race caught. + } + // Reference acquired. + return file, flags + } + // No file available. + return nil, FDFlags{} + } +} + +// GetFDs returns a list of valid fds. +func (f *FDTable) GetFDs() []int32 { + fds := make([]int32, 0, int(atomic.LoadInt32(&f.used))) + f.forEach(func(fd int32, file *fs.File, flags FDFlags) { + fds = append(fds, fd) + }) + return fds +} + +// GetRefs returns a stable slice of references to all files and bumps the +// reference count on each. The caller must use DecRef on each reference when +// they're done using the slice. +func (f *FDTable) GetRefs() []*fs.File { + files := make([]*fs.File, 0, f.Size()) + f.forEach(func(_ int32, file *fs.File, flags FDFlags) { + file.IncRef() // Acquire a reference for caller. + files = append(files, file) + }) + return files +} + +// Fork returns an independent FDTable. +func (f *FDTable) Fork() *FDTable { + clone := f.k.NewFDTable() + + f.forEach(func(fd int32, file *fs.File, flags FDFlags) { + // The set function here will acquire an appropriate table + // reference for the clone. We don't need anything else. + clone.set(fd, file, flags) + }) + return clone +} + +// Remove removes an FD from and returns a non-file iff successful. +// +// N.B. Callers are required to use DecRef when they are done. +func (f *FDTable) Remove(fd int32) *fs.File { + if fd < 0 { + return nil + } + + f.mu.Lock() + defer f.mu.Unlock() + + orig, _, _ := f.get(fd) + if orig != nil { + orig.IncRef() // Reference for caller. + f.set(fd, nil, FDFlags{}) // Zap entry. + } + return orig +} + +// RemoveIf removes all FDs where cond is true. +func (f *FDTable) RemoveIf(cond func(*fs.File, FDFlags) bool) { + f.mu.Lock() + defer f.mu.Unlock() + + f.forEach(func(fd int32, file *fs.File, flags FDFlags) { + if cond(file, flags) { + f.set(fd, nil, FDFlags{}) // Clear from table. + } + }) +} diff --git a/pkg/sentry/kernel/fd_table_test.go b/pkg/sentry/kernel/fd_table_test.go new file mode 100644 index 000000000..2413788e7 --- /dev/null +++ b/pkg/sentry/kernel/fd_table_test.go @@ -0,0 +1,192 @@ +// Copyright 2018 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package kernel + +import ( + "runtime" + "sync" + "testing" + + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/filetest" + "gvisor.dev/gvisor/pkg/sentry/limits" +) + +const ( + // maxFD is the maximum FD to try to create in the map. + // + // This number of open files has been seen in the wild. + maxFD = 2 * 1024 +) + +func runTest(t testing.TB, fn func(ctx context.Context, fdTable *FDTable, file *fs.File, limitSet *limits.LimitSet)) { + t.Helper() // Don't show in stacks. + + // Create the limits and context. + limitSet := limits.NewLimitSet() + limitSet.Set(limits.NumberOfFiles, limits.Limit{maxFD, maxFD}, true) + ctx := contexttest.WithLimitSet(contexttest.Context(t), limitSet) + + // Create a test file.; + file := filetest.NewTestFile(t) + + // Create the table. + fdTable := new(FDTable) + fdTable.init() + + // Run the test. + fn(ctx, fdTable, file, limitSet) +} + +// TestFDTableMany allocates maxFD FDs, i.e. maxes out the FDTable, until there +// is no room, then makes sure that NewFDAt works and also that if we remove +// one and add one that works too. +func TestFDTableMany(t *testing.T) { + runTest(t, func(ctx context.Context, fdTable *FDTable, file *fs.File, _ *limits.LimitSet) { + for i := 0; i < maxFD; i++ { + if _, err := fdTable.NewFDs(ctx, 0, []*fs.File{file}, FDFlags{}); err != nil { + t.Fatalf("Allocated %v FDs but wanted to allocate %v", i, maxFD) + } + } + + if _, err := fdTable.NewFDs(ctx, 0, []*fs.File{file}, FDFlags{}); err == nil { + t.Fatalf("fdTable.NewFDs(0, r) in full map: got nil, wanted error") + } + + if err := fdTable.NewFDAt(ctx, 1, file, FDFlags{}); err != nil { + t.Fatalf("fdTable.NewFDAt(1, r, FDFlags{}): got %v, wanted nil", err) + } + }) +} + +// TestFDTable does a set of simple tests to make sure simple adds, removes, +// GetRefs, and DecRefs work. The ordering is just weird enough that a +// table-driven approach seemed clumsy. +func TestFDTable(t *testing.T) { + runTest(t, func(ctx context.Context, fdTable *FDTable, file *fs.File, limitSet *limits.LimitSet) { + // Cap the limit at one. + limitSet.Set(limits.NumberOfFiles, limits.Limit{1, maxFD}, true) + + if _, err := fdTable.NewFDs(ctx, 0, []*fs.File{file}, FDFlags{}); err != nil { + t.Fatalf("Adding an FD to an empty 1-size map: got %v, want nil", err) + } + + if _, err := fdTable.NewFDs(ctx, 0, []*fs.File{file}, FDFlags{}); err == nil { + t.Fatalf("Adding an FD to a filled 1-size map: got nil, wanted an error") + } + + // Remove the previous limit. + limitSet.Set(limits.NumberOfFiles, limits.Limit{maxFD, maxFD}, true) + + if fds, err := fdTable.NewFDs(ctx, 0, []*fs.File{file}, FDFlags{}); err != nil { + t.Fatalf("Adding an FD to a resized map: got %v, want nil", err) + } else if len(fds) != 1 || fds[0] != 1 { + t.Fatalf("Added an FD to a resized map: got %v, want {1}", fds) + } + + if err := fdTable.NewFDAt(ctx, 1, file, FDFlags{}); err != nil { + t.Fatalf("Replacing FD 1 via fdTable.NewFDAt(1, r, FDFlags{}): got %v, wanted nil", err) + } + + if err := fdTable.NewFDAt(ctx, maxFD+1, file, FDFlags{}); err == nil { + t.Fatalf("Using an FD that was too large via fdTable.NewFDAt(%v, r, FDFlags{}): got nil, wanted an error", maxFD+1) + } + + if ref, _ := fdTable.Get(1); ref == nil { + t.Fatalf("fdTable.Get(1): got nil, wanted %v", file) + } + + if ref, _ := fdTable.Get(2); ref != nil { + t.Fatalf("fdTable.Get(2): got a %v, wanted nil", ref) + } + + ref := fdTable.Remove(1) + if ref == nil { + t.Fatalf("fdTable.Remove(1) for an existing FD: failed, want success") + } + ref.DecRef() + + if ref := fdTable.Remove(1); ref != nil { + t.Fatalf("r.Remove(1) for a removed FD: got success, want failure") + } + }) +} + +func TestDescriptorFlags(t *testing.T) { + runTest(t, func(ctx context.Context, fdTable *FDTable, file *fs.File, _ *limits.LimitSet) { + if err := fdTable.NewFDAt(ctx, 2, file, FDFlags{CloseOnExec: true}); err != nil { + t.Fatalf("fdTable.NewFDAt(2, r, FDFlags{}): got %v, wanted nil", err) + } + + newFile, flags := fdTable.Get(2) + if newFile == nil { + t.Fatalf("fdTable.Get(2): got a %v, wanted nil", newFile) + } + + if !flags.CloseOnExec { + t.Fatalf("new File flags %v don't match original %d\n", flags, 0) + } + }) +} + +func BenchmarkFDLookupAndDecRef(b *testing.B) { + b.StopTimer() // Setup. + + runTest(b, func(ctx context.Context, fdTable *FDTable, file *fs.File, _ *limits.LimitSet) { + fds, err := fdTable.NewFDs(ctx, 0, []*fs.File{file, file, file, file, file}, FDFlags{}) + if err != nil { + b.Fatalf("fdTable.NewFDs: got %v, wanted nil", err) + } + + b.StartTimer() // Benchmark. + for i := 0; i < b.N; i++ { + tf, _ := fdTable.Get(fds[i%len(fds)]) + tf.DecRef() + } + }) +} + +func BenchmarkFDLookupAndDecRefConcurrent(b *testing.B) { + b.StopTimer() // Setup. + + runTest(b, func(ctx context.Context, fdTable *FDTable, file *fs.File, _ *limits.LimitSet) { + fds, err := fdTable.NewFDs(ctx, 0, []*fs.File{file, file, file, file, file}, FDFlags{}) + if err != nil { + b.Fatalf("fdTable.NewFDs: got %v, wanted nil", err) + } + + concurrency := runtime.GOMAXPROCS(0) + if concurrency < 4 { + concurrency = 4 + } + each := b.N / concurrency + + b.StartTimer() // Benchmark. + var wg sync.WaitGroup + for i := 0; i < concurrency; i++ { + wg.Add(1) + go func() { + defer wg.Done() + for i := 0; i < each; i++ { + tf, _ := fdTable.Get(fds[i%len(fds)]) + tf.DecRef() + } + }() + } + wg.Wait() + }) +} diff --git a/pkg/sentry/kernel/fd_table_unsafe.go b/pkg/sentry/kernel/fd_table_unsafe.go new file mode 100644 index 000000000..e009df974 --- /dev/null +++ b/pkg/sentry/kernel/fd_table_unsafe.go @@ -0,0 +1,103 @@ +// Copyright 2018 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package kernel + +import ( + "sync/atomic" + "unsafe" + + "gvisor.dev/gvisor/pkg/sentry/fs" +) + +type descriptorTable struct { + // slice is a *[]unsafe.Pointer, where each element is actually + // *descriptor object, updated atomically. + // + // Changes to the slice itself requiring holding FDTable.mu. + slice unsafe.Pointer `state:".(map[int32]*descriptor)"` +} + +// init initializes the table. +func (f *FDTable) init() { + var slice []unsafe.Pointer // Empty slice. + atomic.StorePointer(&f.slice, unsafe.Pointer(&slice)) +} + +// get gets a file entry. +// +// The boolean indicates whether this was in range. +// +//go:nosplit +func (f *FDTable) get(fd int32) (*fs.File, FDFlags, bool) { + slice := *(*[]unsafe.Pointer)(atomic.LoadPointer(&f.slice)) + if fd >= int32(len(slice)) { + return nil, FDFlags{}, false + } + d := (*descriptor)(atomic.LoadPointer(&slice[fd])) + if d == nil { + return nil, FDFlags{}, true + } + return d.file, d.flags, true +} + +// set sets an entry. +// +// This handles accounting changes, as well as acquiring and releasing the +// reference needed by the table iff the file is different. +// +// Precondition: mu must be held. +func (f *FDTable) set(fd int32, file *fs.File, flags FDFlags) { + slice := *(*[]unsafe.Pointer)(atomic.LoadPointer(&f.slice)) + + // Grow the table as required. + if last := int32(len(slice)); fd >= last { + end := fd + 1 + if end < 2*last { + end = 2 * last + } + slice = append(slice, make([]unsafe.Pointer, end-last)...) + atomic.StorePointer(&f.slice, unsafe.Pointer(&slice)) + } + + // Create the new element. + var d *descriptor + if file != nil { + d = &descriptor{ + file: file, + flags: flags, + } + } + + // Update the single element. + orig := (*descriptor)(atomic.SwapPointer(&slice[fd], unsafe.Pointer(d))) + + // Acquire a table reference. + if file != nil && (orig == nil || file != orig.file) { + file.IncRef() + } + + // Drop the table reference. + if orig != nil && file != orig.file { + f.drop(orig.file) + } + + // Adjust used. + switch { + case orig == nil && file != nil: + atomic.AddInt32(&f.used, 1) + case orig != nil && file == nil: + atomic.AddInt32(&f.used, -1) + } +} diff --git a/pkg/sentry/kernel/fs_context.go b/pkg/sentry/kernel/fs_context.go index d8115f59a..ded27d668 100644 --- a/pkg/sentry/kernel/fs_context.go +++ b/pkg/sentry/kernel/fs_context.go @@ -18,8 +18,8 @@ import ( "fmt" "sync" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // FSContext contains filesystem context. @@ -51,18 +51,20 @@ type FSContext struct { func newFSContext(root, cwd *fs.Dirent, umask uint) *FSContext { root.IncRef() cwd.IncRef() - return &FSContext{ + f := FSContext{ root: root, cwd: cwd, umask: umask, } + f.EnableLeakCheck("kernel.FSContext") + return &f } // destroy is the destructor for an FSContext. // // This will call DecRef on both root and cwd Dirents. If either call to -// DecRef returns an error, then it will be propigated. If both calls to -// DecRef return an error, then the one from root.DecRef will be propigated. +// DecRef returns an error, then it will be propagated. If both calls to +// DecRef return an error, then the one from root.DecRef will be propagated. // // Note that there may still be calls to WorkingDirectory() or RootDirectory() // (that return nil). This is because valid references may still be held via diff --git a/pkg/sentry/kernel/futex/BUILD b/pkg/sentry/kernel/futex/BUILD index b6af5b20b..6a31dc044 100644 --- a/pkg/sentry/kernel/futex/BUILD +++ b/pkg/sentry/kernel/futex/BUILD @@ -5,7 +5,7 @@ load("//tools/go_stateify:defs.bzl", "go_library", "go_test") go_template_instance( name = "atomicptr_bucket", - out = "atomicptr_bucket.go", + out = "atomicptr_bucket_unsafe.go", package = "futex", suffix = "Bucket", template = "//third_party/gvsync:generic_atomicptr", @@ -29,11 +29,11 @@ go_template_instance( go_library( name = "futex", srcs = [ - "atomicptr_bucket.go", + "atomicptr_bucket_unsafe.go", "futex.go", "waiter_list.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/futex", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/futex", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/kernel/futex/futex.go b/pkg/sentry/kernel/futex/futex.go index bb38eb81e..278cc8143 100644 --- a/pkg/sentry/kernel/futex/futex.go +++ b/pkg/sentry/kernel/futex/futex.go @@ -20,10 +20,10 @@ package futex import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // KeyKind indicates the type of a Key. @@ -729,14 +729,14 @@ func (m *Manager) UnlockPI(t Target, addr usermem.Addr, tid uint32, private bool } b := m.lockBucket(&k) - err = m.unlockPILocked(t, addr, tid, b) + err = m.unlockPILocked(t, addr, tid, b, &k) k.release() b.mu.Unlock() return err } -func (m *Manager) unlockPILocked(t Target, addr usermem.Addr, tid uint32, b *bucket) error { +func (m *Manager) unlockPILocked(t Target, addr usermem.Addr, tid uint32, b *bucket, key *Key) error { cur, err := t.LoadUint32(addr) if err != nil { return err @@ -746,7 +746,22 @@ func (m *Manager) unlockPILocked(t Target, addr usermem.Addr, tid uint32, b *buc return syserror.EPERM } - if b.waiters.Empty() { + var next *Waiter // Who's the next owner? + var next2 *Waiter // Who's the one after that? + for w := b.waiters.Front(); w != nil; w = w.Next() { + if !w.key.matches(key) { + continue + } + + if next == nil { + next = w + } else { + next2 = w + break + } + } + + if next == nil { // It's safe to set 0 because there are no waiters, no new owner, and the // executing task is the current owner (no owner died bit). prev, err := t.CompareAndSwapUint32(addr, cur, 0) @@ -761,12 +776,10 @@ func (m *Manager) unlockPILocked(t Target, addr usermem.Addr, tid uint32, b *buc return nil } - next := b.waiters.Front() - // Set next owner's TID, waiters if there are any. Resets owner died bit, if // set, because the executing task takes over as the owner. val := next.tid - if next.Next() != nil { + if next2 != nil { val |= linux.FUTEX_WAITERS } diff --git a/pkg/sentry/kernel/futex/futex_test.go b/pkg/sentry/kernel/futex/futex_test.go index 2de5239bf..65e5d1428 100644 --- a/pkg/sentry/kernel/futex/futex_test.go +++ b/pkg/sentry/kernel/futex/futex_test.go @@ -23,7 +23,7 @@ import ( "testing" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // testData implements the Target interface, and allows us to diff --git a/pkg/sentry/kernel/ipc_namespace.go b/pkg/sentry/kernel/ipc_namespace.go index ebe12812c..80a070d7e 100644 --- a/pkg/sentry/kernel/ipc_namespace.go +++ b/pkg/sentry/kernel/ipc_namespace.go @@ -15,9 +15,9 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/semaphore" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/kernel/semaphore" + "gvisor.dev/gvisor/pkg/sentry/kernel/shm" ) // IPCNamespace represents an IPC namespace. @@ -40,7 +40,7 @@ func NewIPCNamespace(userNS *auth.UserNamespace) *IPCNamespace { } } -// SemaphoreRegistry returns the semanphore set registry for this namespace. +// SemaphoreRegistry returns the semaphore set registry for this namespace. func (i *IPCNamespace) SemaphoreRegistry() *semaphore.Registry { return i.semaphores } diff --git a/pkg/sentry/kernel/kdefs/BUILD b/pkg/sentry/kernel/kdefs/BUILD deleted file mode 100644 index 38aaca134..000000000 --- a/pkg/sentry/kernel/kdefs/BUILD +++ /dev/null @@ -1,10 +0,0 @@ -load("//tools/go_stateify:defs.bzl", "go_library") - -package(licenses = ["notice"]) - -go_library( - name = "kdefs", - srcs = ["kdefs.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs", - visibility = ["//:sandbox"], -) diff --git a/pkg/sentry/kernel/kernel.go b/pkg/sentry/kernel/kernel.go index f253a81d9..38b49cba2 100644 --- a/pkg/sentry/kernel/kernel.go +++ b/pkg/sentry/kernel/kernel.go @@ -39,34 +39,34 @@ import ( "sync/atomic" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/cpuid" - "gvisor.googlesource.com/gvisor/pkg/eventchannel" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/timerfd" - "gvisor.googlesource.com/gvisor/pkg/sentry/hostcpu" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/epoll" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/futex" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/sched" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/loader" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/netlink/port" - sentrytime "gvisor.googlesource.com/gvisor/pkg/sentry/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/unimpl" - uspb "gvisor.googlesource.com/gvisor/pkg/sentry/unimpl/unimplemented_syscall_go_proto" - "gvisor.googlesource.com/gvisor/pkg/sentry/uniqueid" - "gvisor.googlesource.com/gvisor/pkg/state" - "gvisor.googlesource.com/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/eventchannel" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/timerfd" + "gvisor.dev/gvisor/pkg/sentry/hostcpu" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/kernel/epoll" + "gvisor.dev/gvisor/pkg/sentry/kernel/futex" + "gvisor.dev/gvisor/pkg/sentry/kernel/sched" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/loader" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/socket/netlink/port" + sentrytime "gvisor.dev/gvisor/pkg/sentry/time" + "gvisor.dev/gvisor/pkg/sentry/unimpl" + uspb "gvisor.dev/gvisor/pkg/sentry/unimpl/unimplemented_syscall_go_proto" + "gvisor.dev/gvisor/pkg/sentry/uniqueid" + "gvisor.dev/gvisor/pkg/state" + "gvisor.dev/gvisor/pkg/tcpip" ) // Kernel represents an emulated Linux kernel. It must be initialized by calling @@ -155,7 +155,7 @@ type Kernel struct { // cpuClockTicker increments cpuClock. cpuClockTicker *ktime.Timer `state:"nosave"` - // fdMapUids is an ever-increasing counter for generating FDMap uids. + // fdMapUids is an ever-increasing counter for generating FDTable uids. // // fdMapUids is mutable, and is accessed using atomic memory operations. fdMapUids uint64 @@ -381,13 +381,27 @@ func (k *Kernel) SaveTo(w io.Writer) error { // flushMountSourceRefs flushes the MountSources for all mounted filesystems // and open FDs. func (k *Kernel) flushMountSourceRefs() error { - // Flush all mount sources for currently mounted filesystems. + // Flush all mount sources for currently mounted filesystems in the + // root mount namespace. k.mounts.FlushMountSourceRefs() + // Some tasks may have other mount namespaces; flush those as well. + flushed := make(map[*fs.MountNamespace]struct{}) + k.tasks.mu.RLock() + k.tasks.forEachThreadGroupLocked(func(tg *ThreadGroup) { + if _, ok := flushed[tg.mounts]; ok { + // Already flushed. + return + } + tg.mounts.FlushMountSourceRefs() + flushed[tg.mounts] = struct{}{} + }) + k.tasks.mu.RUnlock() + // There may be some open FDs whose filesystems have been unmounted. We // must flush those as well. - return k.tasks.forEachFDPaused(func(desc descriptor) error { - desc.file.Dirent.Inode.MountSource.FlushDirentRefs() + return k.tasks.forEachFDPaused(func(file *fs.File) error { + file.Dirent.Inode.MountSource.FlushDirentRefs() return nil }) } @@ -396,35 +410,35 @@ func (k *Kernel) flushMountSourceRefs() error { // task. // // Precondition: Must be called with the kernel paused. -func (ts *TaskSet) forEachFDPaused(f func(descriptor) error) error { +func (ts *TaskSet) forEachFDPaused(f func(*fs.File) error) (err error) { ts.mu.RLock() defer ts.mu.RUnlock() for t := range ts.Root.tids { // We can skip locking Task.mu here since the kernel is paused. - if t.fds == nil { + if t.fdTable == nil { continue } - for _, desc := range t.fds.files { - if err := f(desc); err != nil { - return err + t.fdTable.forEach(func(_ int32, file *fs.File, _ FDFlags) { + if lastErr := f(file); lastErr != nil && err == nil { + err = lastErr } - } + }) } - return nil + return err } func (ts *TaskSet) flushWritesToFiles(ctx context.Context) error { - return ts.forEachFDPaused(func(desc descriptor) error { - if flags := desc.file.Flags(); !flags.Write { + return ts.forEachFDPaused(func(file *fs.File) error { + if flags := file.Flags(); !flags.Write { return nil } - if sattr := desc.file.Dirent.Inode.StableAttr; !fs.IsFile(sattr) && !fs.IsDir(sattr) { + if sattr := file.Dirent.Inode.StableAttr; !fs.IsFile(sattr) && !fs.IsDir(sattr) { return nil } // Here we need all metadata synced. - syncErr := desc.file.Fsync(ctx, 0, fs.FileMaxOffset, fs.SyncAll) + syncErr := file.Fsync(ctx, 0, fs.FileMaxOffset, fs.SyncAll) if err := fs.SaveFileFsyncError(syncErr); err != nil { - name, _ := desc.file.Dirent.FullName(nil /* root */) + name, _ := file.Dirent.FullName(nil /* root */) // Wrap this error in ErrSaveRejection // so that it will trigger a save // error, rather than a panic. This @@ -469,14 +483,12 @@ func (ts *TaskSet) unregisterEpollWaiters() { defer ts.mu.RUnlock() for t := range ts.Root.tids { // We can skip locking Task.mu here since the kernel is paused. - if fdmap := t.fds; fdmap != nil { - for _, desc := range fdmap.files { - if desc.file != nil { - if e, ok := desc.file.FileOperations.(*epoll.EventPoll); ok { - e.UnregisterEpollWaiters() - } + if t.fdTable != nil { + t.fdTable.forEach(func(_ int32, file *fs.File, _ FDFlags) { + if e, ok := file.FileOperations.(*epoll.EventPoll); ok { + e.UnregisterEpollWaiters() } - } + }) } } } @@ -524,6 +536,8 @@ func (k *Kernel) LoadFrom(r io.Reader, net inet.Stack) error { } log.Infof("Memory load took [%s].", time.Since(memoryStart)) + log.Infof("Overall load took [%s]", time.Since(loadStart)) + // Ensure that all pending asynchronous work is complete: // - namedpipe opening // - inode file opening @@ -588,9 +602,9 @@ type CreateProcessArgs struct { // Credentials is the initial credentials. Credentials *auth.Credentials - // FDMap is the initial set of file descriptors. If CreateProcess succeeds, - // it takes a reference on FDMap. - FDMap *FDMap + // FDTable is the initial set of file descriptors. If CreateProcess succeeds, + // it takes a reference on FDTable. + FDTable *FDTable // Umask is the initial umask. Umask uint @@ -611,12 +625,18 @@ type CreateProcessArgs struct { // AbstractSocketNamespace is the initial Abstract Socket namespace. AbstractSocketNamespace *AbstractSocketNamespace + // MountNamespace optionally contains the mount namespace for this + // process. If nil, the kernel's mount namespace is used. + // + // Anyone setting MountNamespace must donate a reference (i.e. + // increment it). + MountNamespace *fs.MountNamespace + // Root optionally contains the dirent that serves as the root for the // process. If nil, the mount namespace's root is used as the process' // root. // - // Anyone setting Root must donate a reference (i.e. increment it) to - // keep it alive until it is decremented by CreateProcess. + // Anyone setting Root must donate a reference (i.e. increment it). Root *fs.Dirent // ContainerID is the container that the process belongs to. @@ -659,7 +679,7 @@ func (ctx *createProcessContext) Value(key interface{}) interface{} { return ctx.args.Credentials case fs.CtxRoot: if ctx.args.Root != nil { - // Take a refernce on the root dirent that will be + // Take a reference on the root dirent that will be // given to the caller. ctx.args.Root.IncRef() return ctx.args.Root @@ -715,20 +735,29 @@ func (k *Kernel) CreateProcess(args CreateProcessArgs) (*ThreadGroup, ThreadID, return nil, 0, fmt.Errorf("no kernel MountNamespace") } - tg := k.newThreadGroup(k.tasks.Root, NewSignalHandlers(), linux.SIGCHLD, args.Limits, k.monotonicClock) + // Grab the mount namespace. + mounts := args.MountNamespace + if mounts == nil { + // If no MountNamespace was configured, then use the kernel's + // root mount namespace, with an extra reference that will be + // donated to the task. + mounts = k.mounts + mounts.IncRef() + } + + tg := k.newThreadGroup(mounts, k.tasks.Root, NewSignalHandlers(), linux.SIGCHLD, args.Limits, k.monotonicClock) ctx := args.NewContext(k) // Grab the root directory. root := args.Root if root == nil { - root = fs.RootFromContext(ctx) - // Is the root STILL nil? - if root == nil { - return nil, 0, fmt.Errorf("CreateProcessArgs.Root was not provided, and failed to get root from context") - } + // If no Root was configured, then get it from the + // MountNamespace. + root = mounts.Root() } + // The call to newFSContext below will take a reference on root, so we + // don't need to hold this one. defer root.DecRef() - args.Root = nil // Grab the working directory. remainingTraversals := uint(args.MaxSymlinkTraversals) @@ -760,9 +789,9 @@ func (k *Kernel) CreateProcess(args CreateProcessArgs) (*ThreadGroup, ThreadID, return nil, 0, errors.New(se.String()) } - // Take a reference on the FDMap, which will be transferred to + // Take a reference on the FDTable, which will be transferred to // TaskSet.NewTask(). - args.FDMap.IncRef() + args.FDTable.IncRef() // Create the task. config := &TaskConfig{ @@ -770,7 +799,7 @@ func (k *Kernel) CreateProcess(args CreateProcessArgs) (*ThreadGroup, ThreadID, ThreadGroup: tg, TaskContext: tc, FSContext: newFSContext(root, wd, args.Umask), - FDMap: args.FDMap, + FDTable: args.FDTable, Credentials: args.Credentials, AllowedCPUMask: sched.NewFullCPUSet(k.applicationCores), UTSNamespace: args.UTSNamespace, @@ -842,7 +871,7 @@ func (k *Kernel) pauseTimeLocked() { } // By precondition, nothing else can be interacting with PIDNamespace.tids - // or FDMap.files, so we can iterate them without synchronization. (We + // or FDTable.files, so we can iterate them without synchronization. (We // can't hold the TaskSet mutex when pausing thread group timers because // thread group timers call ThreadGroup.SendSignal, which takes the TaskSet // mutex, while holding the Timer mutex.) @@ -853,14 +882,14 @@ func (k *Kernel) pauseTimeLocked() { it.PauseTimer() } } - // This means we'll iterate FDMaps shared by multiple tasks repeatedly, + // This means we'll iterate FDTables shared by multiple tasks repeatedly, // but ktime.Timer.Pause is idempotent so this is harmless. - if fdm := t.fds; fdm != nil { - for _, desc := range fdm.files { - if tfd, ok := desc.file.FileOperations.(*timerfd.TimerOperations); ok { + if t.fdTable != nil { + t.fdTable.forEach(func(_ int32, file *fs.File, _ FDFlags) { + if tfd, ok := file.FileOperations.(*timerfd.TimerOperations); ok { tfd.PauseTimer() } - } + }) } } k.timekeeper.PauseUpdates() @@ -885,12 +914,12 @@ func (k *Kernel) resumeTimeLocked() { it.ResumeTimer() } } - if fdm := t.fds; fdm != nil { - for _, desc := range fdm.files { - if tfd, ok := desc.file.FileOperations.(*timerfd.TimerOperations); ok { + if t.fdTable != nil { + t.fdTable.forEach(func(_ int32, file *fs.File, _ FDFlags) { + if tfd, ok := file.FileOperations.(*timerfd.TimerOperations); ok { tfd.ResumeTimer() } - } + }) } } } diff --git a/pkg/sentry/kernel/kernel_state.go b/pkg/sentry/kernel/kernel_state.go index 48c3ff5a9..909219086 100644 --- a/pkg/sentry/kernel/kernel_state.go +++ b/pkg/sentry/kernel/kernel_state.go @@ -15,8 +15,8 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/tcpip" ) // saveDanglingEndpoints is invoked by stateify. diff --git a/pkg/sentry/kernel/memevent/BUILD b/pkg/sentry/kernel/memevent/BUILD index 347a69062..ebcfaa619 100644 --- a/pkg/sentry/kernel/memevent/BUILD +++ b/pkg/sentry/kernel/memevent/BUILD @@ -6,7 +6,7 @@ package(licenses = ["notice"]) go_library( name = "memevent", srcs = ["memory_events.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/memevent", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/memevent", visibility = ["//:sandbox"], deps = [ ":memory_events_go_proto", @@ -26,7 +26,7 @@ proto_library( go_proto_library( name = "memory_events_go_proto", - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/memevent/memory_events_go_proto", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/memevent/memory_events_go_proto", proto = ":memory_events_proto", visibility = ["//visibility:public"], ) diff --git a/pkg/sentry/kernel/memevent/memory_events.go b/pkg/sentry/kernel/memevent/memory_events.go index 0e2cee807..b0d98e7f0 100644 --- a/pkg/sentry/kernel/memevent/memory_events.go +++ b/pkg/sentry/kernel/memevent/memory_events.go @@ -20,12 +20,12 @@ import ( "sync" "time" - "gvisor.googlesource.com/gvisor/pkg/eventchannel" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - pb "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/memevent/memory_events_go_proto" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/eventchannel" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/sentry/kernel" + pb "gvisor.dev/gvisor/pkg/sentry/kernel/memevent/memory_events_go_proto" + "gvisor.dev/gvisor/pkg/sentry/usage" ) var totalTicks = metric.MustCreateNewUint64Metric("/memory_events/ticks", false /*sync*/, "Total number of memory event periods that have elapsed since startup.") diff --git a/pkg/sentry/kernel/pending_signals.go b/pkg/sentry/kernel/pending_signals.go index c93f6598a..77a35b788 100644 --- a/pkg/sentry/kernel/pending_signals.go +++ b/pkg/sentry/kernel/pending_signals.go @@ -15,9 +15,9 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/bits" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/bits" + "gvisor.dev/gvisor/pkg/sentry/arch" ) const ( diff --git a/pkg/sentry/kernel/pending_signals_state.go b/pkg/sentry/kernel/pending_signals_state.go index 2c902c7e3..ca8b4e164 100644 --- a/pkg/sentry/kernel/pending_signals_state.go +++ b/pkg/sentry/kernel/pending_signals_state.go @@ -15,7 +15,7 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/arch" ) // +stateify savable diff --git a/pkg/sentry/kernel/pipe/BUILD b/pkg/sentry/kernel/pipe/BUILD index b07d15a2a..4d15cca85 100644 --- a/pkg/sentry/kernel/pipe/BUILD +++ b/pkg/sentry/kernel/pipe/BUILD @@ -27,7 +27,7 @@ go_library( "reader_writer.go", "writer.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/pipe", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/kernel/pipe/buffer.go b/pkg/sentry/kernel/pipe/buffer.go index 4360dc44f..69ef2a720 100644 --- a/pkg/sentry/kernel/pipe/buffer.go +++ b/pkg/sentry/kernel/pipe/buffer.go @@ -17,7 +17,7 @@ package pipe import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/safemem" ) // buffer encapsulates a queueable byte buffer. diff --git a/pkg/sentry/kernel/pipe/buffer_test.go b/pkg/sentry/kernel/pipe/buffer_test.go index 4b7dbc43f..ee1b90115 100644 --- a/pkg/sentry/kernel/pipe/buffer_test.go +++ b/pkg/sentry/kernel/pipe/buffer_test.go @@ -18,7 +18,7 @@ import ( "testing" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) func TestBufferSize(t *testing.T) { diff --git a/pkg/sentry/kernel/pipe/device.go b/pkg/sentry/kernel/pipe/device.go index eb59e15a1..89f5d9342 100644 --- a/pkg/sentry/kernel/pipe/device.go +++ b/pkg/sentry/kernel/pipe/device.go @@ -14,7 +14,7 @@ package pipe -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" // pipeDevice is used for all pipe files. var pipeDevice = device.NewAnonDevice() diff --git a/pkg/sentry/kernel/pipe/node.go b/pkg/sentry/kernel/pipe/node.go index dc7da529e..a2dc72204 100644 --- a/pkg/sentry/kernel/pipe/node.go +++ b/pkg/sentry/kernel/pipe/node.go @@ -17,12 +17,12 @@ package pipe import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/amutex" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/amutex" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/syserror" ) // inodeOperations implements fs.InodeOperations for pipes. diff --git a/pkg/sentry/kernel/pipe/node_test.go b/pkg/sentry/kernel/pipe/node_test.go index 9a946b380..adbad7764 100644 --- a/pkg/sentry/kernel/pipe/node_test.go +++ b/pkg/sentry/kernel/pipe/node_test.go @@ -18,11 +18,11 @@ import ( "testing" "time" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) type sleeper struct { @@ -63,7 +63,7 @@ var perms fs.FilePermissions = fs.FilePermissions{ func testOpenOrDie(ctx context.Context, t *testing.T, n fs.InodeOperations, flags fs.FileFlags, doneChan chan<- struct{}) (*fs.File, error) { inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{Type: fs.Pipe}) - d := fs.NewDirent(inode, "pipe") + d := fs.NewDirent(ctx, inode, "pipe") file, err := n.GetFile(ctx, d, flags) if err != nil { t.Fatalf("open with flags %+v failed: %v", flags, err) @@ -76,7 +76,7 @@ func testOpenOrDie(ctx context.Context, t *testing.T, n fs.InodeOperations, flag func testOpen(ctx context.Context, t *testing.T, n fs.InodeOperations, flags fs.FileFlags, resChan chan<- openResult) (*fs.File, error) { inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{Type: fs.Pipe}) - d := fs.NewDirent(inode, "pipe") + d := fs.NewDirent(ctx, inode, "pipe") file, err := n.GetFile(ctx, d, flags) if resChan != nil { resChan <- openResult{file, err} diff --git a/pkg/sentry/kernel/pipe/pipe.go b/pkg/sentry/kernel/pipe/pipe.go index 73438dc62..247e2928e 100644 --- a/pkg/sentry/kernel/pipe/pipe.go +++ b/pkg/sentry/kernel/pipe/pipe.go @@ -21,11 +21,11 @@ import ( "sync/atomic" "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) const ( @@ -39,19 +39,6 @@ const ( MaximumPipeSize = 8 << 20 ) -// Sizer is an interface for setting and getting the size of a pipe. -// -// It is implemented by Pipe and, through embedding, all other types. -type Sizer interface { - // PipeSize returns the pipe capacity in bytes. - PipeSize() int64 - - // SetPipeSize sets the new pipe capacity in bytes. - // - // The new size is returned (which may be capped). - SetPipeSize(int64) (int64, error) -} - // Pipe is an encapsulation of a platform-independent pipe. // It manages a buffered byte queue shared between a reader/writer // pair. @@ -150,8 +137,8 @@ func NewConnectedPipe(ctx context.Context, sizeBytes, atomicIOBytes int64) (*fs. InodeID: ino, BlockSize: int64(atomicIOBytes), } - ms := fs.NewPseudoMountSource() - d := fs.NewDirent(fs.NewInode(iops, ms, sattr), fmt.Sprintf("pipe:[%d]", ino)) + ms := fs.NewPseudoMountSource(ctx) + d := fs.NewDirent(ctx, fs.NewInode(ctx, iops, ms, sattr), fmt.Sprintf("pipe:[%d]", ino)) // The p.Open calls below will each take a reference on the Dirent. We // must drop the one we already have. defer d.DecRef() @@ -162,6 +149,7 @@ func NewConnectedPipe(ctx context.Context, sizeBytes, atomicIOBytes int64) (*fs. // // Precondition: at least one of flags.Read or flags.Write must be set. func (p *Pipe) Open(ctx context.Context, d *fs.Dirent, flags fs.FileFlags) *fs.File { + flags.NonSeekable = true switch { case flags.Read && flags.Write: p.rOpen() @@ -398,15 +386,15 @@ func (p *Pipe) queued() int64 { return p.size } -// PipeSize implements PipeSizer.PipeSize. -func (p *Pipe) PipeSize() int64 { +// FifoSize implements fs.FifoSizer.FifoSize. +func (p *Pipe) FifoSize(context.Context, *fs.File) (int64, error) { p.mu.Lock() defer p.mu.Unlock() - return p.max + return p.max, nil } -// SetPipeSize implements PipeSize.SetPipeSize. -func (p *Pipe) SetPipeSize(size int64) (int64, error) { +// SetFifoSize implements fs.FifoSizer.SetFifoSize. +func (p *Pipe) SetFifoSize(size int64) (int64, error) { if size < 0 { return 0, syserror.EINVAL } diff --git a/pkg/sentry/kernel/pipe/pipe_test.go b/pkg/sentry/kernel/pipe/pipe_test.go index 298c6587b..e3a14b665 100644 --- a/pkg/sentry/kernel/pipe/pipe_test.go +++ b/pkg/sentry/kernel/pipe/pipe_test.go @@ -18,10 +18,10 @@ import ( "bytes" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) func TestPipeRW(t *testing.T) { diff --git a/pkg/sentry/kernel/pipe/reader.go b/pkg/sentry/kernel/pipe/reader.go index 656be824d..7724b4452 100644 --- a/pkg/sentry/kernel/pipe/reader.go +++ b/pkg/sentry/kernel/pipe/reader.go @@ -15,7 +15,7 @@ package pipe import ( - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/waiter" ) // Reader satisfies the fs.FileOperations interface for read-only pipes. diff --git a/pkg/sentry/kernel/pipe/reader_writer.go b/pkg/sentry/kernel/pipe/reader_writer.go index e560b9be9..f69dbf27b 100644 --- a/pkg/sentry/kernel/pipe/reader_writer.go +++ b/pkg/sentry/kernel/pipe/reader_writer.go @@ -18,13 +18,13 @@ import ( "math" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/waiter" ) // ReaderWriter satisfies the FileOperations interface and services both @@ -77,7 +77,7 @@ func (rw *ReaderWriter) Readiness(mask waiter.EventMask) waiter.EventMask { } // Ioctl implements fs.FileOperations.Ioctl. -func (rw *ReaderWriter) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (rw *ReaderWriter) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { // Switch on ioctl request. switch int(args[1].Int()) { case linux.FIONREAD: diff --git a/pkg/sentry/kernel/pipe/writer.go b/pkg/sentry/kernel/pipe/writer.go index 8d5b68541..5bc6aa931 100644 --- a/pkg/sentry/kernel/pipe/writer.go +++ b/pkg/sentry/kernel/pipe/writer.go @@ -15,7 +15,7 @@ package pipe import ( - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/waiter" ) // Writer satisfies the fs.FileOperations interface for write-only pipes. diff --git a/pkg/sentry/kernel/posixtimer.go b/pkg/sentry/kernel/posixtimer.go index a016b4087..c5d095af7 100644 --- a/pkg/sentry/kernel/posixtimer.go +++ b/pkg/sentry/kernel/posixtimer.go @@ -17,10 +17,10 @@ package kernel import ( "math" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/syserror" ) // IntervalTimer represents a POSIX interval timer as described by diff --git a/pkg/sentry/kernel/ptrace.go b/pkg/sentry/kernel/ptrace.go index 193447b17..3be171cdc 100644 --- a/pkg/sentry/kernel/ptrace.go +++ b/pkg/sentry/kernel/ptrace.go @@ -17,11 +17,11 @@ package kernel import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // ptraceOptions are the subset of options controlling a task's ptrace behavior diff --git a/pkg/sentry/kernel/ptrace_amd64.go b/pkg/sentry/kernel/ptrace_amd64.go index 048eeaa3f..5514cf432 100644 --- a/pkg/sentry/kernel/ptrace_amd64.go +++ b/pkg/sentry/kernel/ptrace_amd64.go @@ -17,9 +17,9 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // ptraceArch implements arch-specific ptrace commands. diff --git a/pkg/sentry/kernel/ptrace_arm64.go b/pkg/sentry/kernel/ptrace_arm64.go index 4899c813f..0acdf769d 100644 --- a/pkg/sentry/kernel/ptrace_arm64.go +++ b/pkg/sentry/kernel/ptrace_arm64.go @@ -17,9 +17,9 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // ptraceArch implements arch-specific ptrace commands. diff --git a/pkg/sentry/kernel/rseq.go b/pkg/sentry/kernel/rseq.go index c4fb2c56c..24ea002ba 100644 --- a/pkg/sentry/kernel/rseq.go +++ b/pkg/sentry/kernel/rseq.go @@ -15,9 +15,9 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/hostcpu" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/hostcpu" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // Restartable sequences, as described in https://lwn.net/Articles/650333/. diff --git a/pkg/sentry/kernel/sched/BUILD b/pkg/sentry/kernel/sched/BUILD index 184e8a35b..1725b8562 100644 --- a/pkg/sentry/kernel/sched/BUILD +++ b/pkg/sentry/kernel/sched/BUILD @@ -8,7 +8,7 @@ go_library( "cpuset.go", "sched.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/sched", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/sched", visibility = ["//pkg/sentry:internal"], ) diff --git a/pkg/sentry/kernel/seccomp.go b/pkg/sentry/kernel/seccomp.go index cc75eb08a..2347dcf36 100644 --- a/pkg/sentry/kernel/seccomp.go +++ b/pkg/sentry/kernel/seccomp.go @@ -17,12 +17,12 @@ package kernel import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/bpf" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/bpf" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) const maxSyscallFilterInstructions = 1 << 15 diff --git a/pkg/sentry/kernel/semaphore/BUILD b/pkg/sentry/kernel/semaphore/BUILD index 840943ca8..36edf10f3 100644 --- a/pkg/sentry/kernel/semaphore/BUILD +++ b/pkg/sentry/kernel/semaphore/BUILD @@ -21,7 +21,7 @@ go_library( "semaphore.go", "waiter_list.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/semaphore", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/semaphore", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/kernel/semaphore/semaphore.go b/pkg/sentry/kernel/semaphore/semaphore.go index 9d0620e02..93fe68a3e 100644 --- a/pkg/sentry/kernel/semaphore/semaphore.go +++ b/pkg/sentry/kernel/semaphore/semaphore.go @@ -19,13 +19,13 @@ import ( "fmt" "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/syserror" ) const ( @@ -86,7 +86,7 @@ type Set struct { dead bool } -// sem represents a single semanphore from a set. +// sem represents a single semaphore from a set. // // +stateify savable type sem struct { diff --git a/pkg/sentry/kernel/semaphore/semaphore_test.go b/pkg/sentry/kernel/semaphore/semaphore_test.go index abfcd0fb4..c235f6ca4 100644 --- a/pkg/sentry/kernel/semaphore/semaphore_test.go +++ b/pkg/sentry/kernel/semaphore/semaphore_test.go @@ -17,11 +17,11 @@ package semaphore import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/syserror" ) func executeOps(ctx context.Context, t *testing.T, set *Set, ops []linux.Sembuf, block bool) chan struct{} { diff --git a/pkg/sentry/kernel/sessions.go b/pkg/sentry/kernel/sessions.go index 610e199da..81fcd8258 100644 --- a/pkg/sentry/kernel/sessions.go +++ b/pkg/sentry/kernel/sessions.go @@ -15,10 +15,10 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/syserror" ) // SessionID is the public identifier. @@ -294,6 +294,7 @@ func (tg *ThreadGroup) createSession() error { id: SessionID(id), leader: tg, } + s.refs.EnableLeakCheck("kernel.Session") // Create a new ProcessGroup, belonging to that Session. // This also has a single reference (assigned below). @@ -307,6 +308,7 @@ func (tg *ThreadGroup) createSession() error { session: s, ancestors: 0, } + pg.refs.EnableLeakCheck("kernel.ProcessGroup") // Tie them and return the result. s.processGroups.PushBack(pg) @@ -378,11 +380,13 @@ func (tg *ThreadGroup) CreateProcessGroup() error { // We manually adjust the ancestors if the parent is in the same // session. tg.processGroup.session.incRef() - pg := &ProcessGroup{ + pg := ProcessGroup{ id: ProcessGroupID(id), originator: tg, session: tg.processGroup.session, } + pg.refs.EnableLeakCheck("kernel.ProcessGroup") + if tg.leader.parent != nil && tg.leader.parent.tg.processGroup.session == pg.session { pg.ancestors++ } @@ -390,20 +394,20 @@ func (tg *ThreadGroup) CreateProcessGroup() error { // Assign the new process group; adjust children. oldParentPG := tg.parentPG() tg.forEachChildThreadGroupLocked(func(childTG *ThreadGroup) { - childTG.processGroup.incRefWithParent(pg) + childTG.processGroup.incRefWithParent(&pg) childTG.processGroup.decRefWithParent(oldParentPG) }) tg.processGroup.decRefWithParent(oldParentPG) - tg.processGroup = pg + tg.processGroup = &pg // Add the new process group to the session. - pg.session.processGroups.PushBack(pg) + pg.session.processGroups.PushBack(&pg) // Ensure this translation is added to all namespaces. for ns := tg.pidns; ns != nil; ns = ns.parent { local := ns.tgids[tg] - ns.pgids[pg] = ProcessGroupID(local) - ns.processGroups[ProcessGroupID(local)] = pg + ns.pgids[&pg] = ProcessGroupID(local) + ns.processGroups[ProcessGroupID(local)] = &pg } return nil diff --git a/pkg/sentry/kernel/shm/BUILD b/pkg/sentry/kernel/shm/BUILD index bc2089872..aa7471eb6 100644 --- a/pkg/sentry/kernel/shm/BUILD +++ b/pkg/sentry/kernel/shm/BUILD @@ -8,7 +8,7 @@ go_library( "device.go", "shm.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/shm", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/kernel/shm/device.go b/pkg/sentry/kernel/shm/device.go index 3cb759072..6b0d5818b 100644 --- a/pkg/sentry/kernel/shm/device.go +++ b/pkg/sentry/kernel/shm/device.go @@ -14,7 +14,7 @@ package shm -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" // shmDevice is the kernel shm device. var shmDevice = device.NewAnonDevice() diff --git a/pkg/sentry/kernel/shm/shm.go b/pkg/sentry/kernel/shm/shm.go index 00393b5f0..5bd610f68 100644 --- a/pkg/sentry/kernel/shm/shm.go +++ b/pkg/sentry/kernel/shm/shm.go @@ -37,19 +37,19 @@ import ( "fmt" "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // Key represents a shm segment key. Analogous to a file name. @@ -224,6 +224,7 @@ func (r *Registry) newShm(ctx context.Context, pid int32, key Key, creator fs.Fi creatorPID: pid, changeTime: ktime.NowFromContext(ctx), } + shm.EnableLeakCheck("kernel.Shm") // Find the next available ID. for id := r.lastIDUsed + 1; id != r.lastIDUsed; id++ { diff --git a/pkg/sentry/kernel/signal.go b/pkg/sentry/kernel/signal.go index b528ec0dc..02eede93d 100644 --- a/pkg/sentry/kernel/signal.go +++ b/pkg/sentry/kernel/signal.go @@ -17,10 +17,10 @@ package kernel import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/platform" ) // SignalPanic is used to panic the running threads. It is a signal which diff --git a/pkg/sentry/kernel/signal_handlers.go b/pkg/sentry/kernel/signal_handlers.go index ce8bcb5e5..a16f3d57f 100644 --- a/pkg/sentry/kernel/signal_handlers.go +++ b/pkg/sentry/kernel/signal_handlers.go @@ -17,8 +17,8 @@ package kernel import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" ) // SignalHandlers holds information about signal actions. diff --git a/pkg/sentry/kernel/syscalls.go b/pkg/sentry/kernel/syscalls.go index 27cd3728b..220fa73a2 100644 --- a/pkg/sentry/kernel/syscalls.go +++ b/pkg/sentry/kernel/syscalls.go @@ -19,10 +19,10 @@ import ( "sync" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/bits" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/bits" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // maxSyscallNum is the highest supported syscall number. diff --git a/pkg/sentry/kernel/syslog.go b/pkg/sentry/kernel/syslog.go index 175d1b247..8227ecf1d 100644 --- a/pkg/sentry/kernel/syslog.go +++ b/pkg/sentry/kernel/syslog.go @@ -67,6 +67,7 @@ func (s *syslog) Log() []byte { "Creating process schedule...", "Generating random numbers by fair dice roll...", "Rewriting operating system in Javascript...", + "Reticulating splines...", "Consulting tar man page...", "Forking spaghetti code...", "Checking naughty and nice process list...", diff --git a/pkg/sentry/kernel/table_test.go b/pkg/sentry/kernel/table_test.go index 3f2b042c8..32cf47e05 100644 --- a/pkg/sentry/kernel/table_test.go +++ b/pkg/sentry/kernel/table_test.go @@ -17,8 +17,8 @@ package kernel import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/sentry/arch" ) const ( diff --git a/pkg/sentry/kernel/task.go b/pkg/sentry/kernel/task.go index 4d889422f..e91f82bb3 100644 --- a/pkg/sentry/kernel/task.go +++ b/pkg/sentry/kernel/task.go @@ -18,24 +18,24 @@ import ( "sync" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/bpf" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/futex" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/sched" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/unimpl" - "gvisor.googlesource.com/gvisor/pkg/sentry/uniqueid" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/third_party/gvsync" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/bpf" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/kernel/futex" + "gvisor.dev/gvisor/pkg/sentry/kernel/sched" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/unimpl" + "gvisor.dev/gvisor/pkg/sentry/uniqueid" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/third_party/gvsync" ) // Task represents a thread of execution in the untrusted app. It @@ -236,15 +236,15 @@ type Task struct { // tc is protected by mu, and is owned by the task goroutine. tc TaskContext - // fsc is the task's filesystem context. + // fsContext is the task's filesystem context. // - // fsc is protected by mu, and is owned by the task goroutine. - fsc *FSContext + // fsContext is protected by mu, and is owned by the task goroutine. + fsContext *FSContext - // fds is the task's file descriptor table. + // fdTable is the task's file descriptor table. // - // fds is protected by mu, and is owned by the task goroutine. - fds *FDMap + // fdTable is protected by mu, and is owned by the task goroutine. + fdTable *FDTable // If vforkParent is not nil, it is the task that created this task with // vfork() or clone(CLONE_VFORK), and should have its vforkStop ended when @@ -386,10 +386,11 @@ type Task struct { // creds is the task's credentials. // - // creds is protected by mu, however the value itself is immutable and can - // only be changed by a copy. After reading the pointer, access will - // proceed outside the scope of mu. creds is owned by the task goroutine. - creds *auth.Credentials + // creds.Load() may be called without synchronization. creds.Store() is + // serialized by mu. creds is owned by the task goroutine. All + // auth.Credentials objects that creds may point to, or have pointed to + // in the past, must be treated as immutable. + creds auth.AtomicPtrCredentials // utsns is the task's UTS namespace. // @@ -597,11 +598,11 @@ func (t *Task) Value(key interface{}) interface{} { case CtxTask: return t case auth.CtxCredentials: - return t.creds + return t.Credentials() case context.CtxThreadGroupID: return int32(t.ThreadGroup().ID()) case fs.CtxRoot: - return t.fsc.RootDirectory() + return t.fsContext.RootDirectory() case fs.CtxDirentCacheLimiter: return t.k.DirentCacheLimiter case inet.CtxStack: @@ -665,9 +666,9 @@ func (t *Task) SyscallRestartBlock() SyscallRestartBlock { // Preconditions: The caller must be running on the task goroutine, or t.mu // must be locked. func (t *Task) IsChrooted() bool { - realRoot := t.k.mounts.Root() + realRoot := t.tg.mounts.Root() defer realRoot.DecRef() - root := t.fsc.RootDirectory() + root := t.fsContext.RootDirectory() if root != nil { defer root.DecRef() } @@ -688,29 +689,68 @@ func (t *Task) TaskContext() *TaskContext { // Precondition: The caller must be running on the task goroutine, or t.mu must // be locked. func (t *Task) FSContext() *FSContext { - return t.fsc + return t.fsContext } -// FDMap returns t's FDMap. FDMap does not take an additional reference on the -// returned FDMap. +// FDTable returns t's FDTable. FDMTable does not take an additional reference +// on the returned FDMap. // // Precondition: The caller must be running on the task goroutine, or t.mu must // be locked. -func (t *Task) FDMap() *FDMap { - return t.fds +func (t *Task) FDTable() *FDTable { + return t.fdTable +} + +// GetFile is a convenience wrapper t.FDTable().GetFile. +// +// Precondition: same as FDTable. +func (t *Task) GetFile(fd int32) *fs.File { + f, _ := t.fdTable.Get(fd) + return f +} + +// NewFDs is a convenience wrapper for t.FDTable().NewFDs. +// +// This automatically passes the task as the context. +// +// Precondition: same as FDTable. +func (t *Task) NewFDs(fd int32, files []*fs.File, flags FDFlags) ([]int32, error) { + return t.fdTable.NewFDs(t, fd, files, flags) +} + +// NewFDFrom is a convenience wrapper for t.FDTable().NewFDs with a single file. +// +// This automatically passes the task as the context. +// +// Precondition: same as FDTable. +func (t *Task) NewFDFrom(fd int32, file *fs.File, flags FDFlags) (int32, error) { + fds, err := t.fdTable.NewFDs(t, fd, []*fs.File{file}, flags) + if err != nil { + return 0, err + } + return fds[0], nil +} + +// NewFDAt is a convenience wrapper for t.FDTable().NewFDAt. +// +// This automatically passes the task as the context. +// +// Precondition: same as FDTable. +func (t *Task) NewFDAt(fd int32, file *fs.File, flags FDFlags) error { + return t.fdTable.NewFDAt(t, fd, file, flags) } // WithMuLocked executes f with t.mu locked. func (t *Task) WithMuLocked(f func(*Task)) { t.mu.Lock() - defer t.mu.Unlock() f(t) + t.mu.Unlock() } // MountNamespace returns t's MountNamespace. MountNamespace does not take an // additional reference on the returned MountNamespace. func (t *Task) MountNamespace() *fs.MountNamespace { - return t.k.mounts + return t.tg.mounts } // AbstractSockets returns t's AbstractSocketNamespace. diff --git a/pkg/sentry/kernel/task_acct.go b/pkg/sentry/kernel/task_acct.go index 1ca2a82eb..5f3e60fe8 100644 --- a/pkg/sentry/kernel/task_acct.go +++ b/pkg/sentry/kernel/task_acct.go @@ -17,11 +17,11 @@ package kernel // Accounting, limits, timers. import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/syserror" ) // Getitimer implements getitimer(2). diff --git a/pkg/sentry/kernel/task_block.go b/pkg/sentry/kernel/task_block.go index 1c76c4d84..2a2e6f662 100644 --- a/pkg/sentry/kernel/task_block.go +++ b/pkg/sentry/kernel/task_block.go @@ -17,8 +17,8 @@ package kernel import ( "time" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/syserror" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/syserror" ) // BlockWithTimeout blocks t until an event is received from C, the application diff --git a/pkg/sentry/kernel/task_clone.go b/pkg/sentry/kernel/task_clone.go index bba8ddd39..0916fd658 100644 --- a/pkg/sentry/kernel/task_clone.go +++ b/pkg/sentry/kernel/task_clone.go @@ -15,10 +15,10 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/bpf" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/bpf" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // SharingOptions controls what resources are shared by a new task created by @@ -214,20 +214,20 @@ func (t *Task) Clone(opts *CloneOptions) (ThreadID, *SyscallControl, error) { } } - var fsc *FSContext + var fsContext *FSContext if opts.NewFSContext { - fsc = t.fsc.Fork() + fsContext = t.fsContext.Fork() } else { - fsc = t.fsc - fsc.IncRef() + fsContext = t.fsContext + fsContext.IncRef() } - var fds *FDMap + var fdTable *FDTable if opts.NewFiles { - fds = t.fds.Fork() + fdTable = t.fdTable.Fork() } else { - fds = t.fds - fds.IncRef() + fdTable = t.fdTable + fdTable.IncRef() } pidns := t.tg.pidns @@ -238,11 +238,12 @@ func (t *Task) Clone(opts *CloneOptions) (ThreadID, *SyscallControl, error) { } tg := t.tg if opts.NewThreadGroup { + tg.mounts.IncRef() sh := t.tg.signalHandlers if opts.NewSignalHandlers { sh = sh.Fork() } - tg = t.k.newThreadGroup(pidns, sh, opts.TerminationSignal, tg.limits.GetCopy(), t.k.monotonicClock) + tg = t.k.newThreadGroup(tg.mounts, pidns, sh, opts.TerminationSignal, tg.limits.GetCopy(), t.k.monotonicClock) } cfg := &TaskConfig{ @@ -250,8 +251,8 @@ func (t *Task) Clone(opts *CloneOptions) (ThreadID, *SyscallControl, error) { ThreadGroup: tg, SignalMask: t.SignalMask(), TaskContext: tc, - FSContext: fsc, - FDMap: fds, + FSContext: fsContext, + FDTable: fdTable, Credentials: creds, Niceness: t.Niceness(), NetworkNamespaced: t.netns, @@ -424,6 +425,7 @@ func (t *Task) Unshare(opts *SharingOptions) error { if opts.NewAddressSpace || opts.NewSignalHandlers { return syserror.EINVAL } + creds := t.Credentials() if opts.NewThreadGroup { t.tg.signalHandlers.mu.Lock() if t.tg.tasksCount != 1 { @@ -438,8 +440,6 @@ func (t *Task) Unshare(opts *SharingOptions) error { if t.IsChrooted() { return syserror.EPERM } - // This temporary is needed because Go. - creds := t.Credentials() newUserNS, err := creds.NewChildUserNamespace() if err != nil { return err @@ -448,6 +448,8 @@ func (t *Task) Unshare(opts *SharingOptions) error { if err != nil { return err } + // Need to reload creds, becaue t.SetUserNamespace() changed task credentials. + creds = t.Credentials() } haveCapSysAdmin := t.HasCapability(linux.CAP_SYS_ADMIN) if opts.NewPIDNamespace { @@ -472,7 +474,7 @@ func (t *Task) Unshare(opts *SharingOptions) error { } // Note that this must happen after NewUserNamespace, so the // new user namespace is used if there is one. - t.utsns = t.utsns.Clone(t.creds.UserNamespace) + t.utsns = t.utsns.Clone(creds.UserNamespace) } if opts.NewIPCNamespace { if !haveCapSysAdmin { @@ -481,24 +483,24 @@ func (t *Task) Unshare(opts *SharingOptions) error { } // Note that "If CLONE_NEWIPC is set, then create the process in a new IPC // namespace" - t.ipcns = NewIPCNamespace(t.creds.UserNamespace) + t.ipcns = NewIPCNamespace(creds.UserNamespace) } - var oldfds *FDMap + var oldFDTable *FDTable if opts.NewFiles { - oldfds = t.fds - t.fds = oldfds.Fork() + oldFDTable = t.fdTable + t.fdTable = oldFDTable.Fork() } - var oldfsc *FSContext + var oldFSContext *FSContext if opts.NewFSContext { - oldfsc = t.fsc - t.fsc = oldfsc.Fork() + oldFSContext = t.fsContext + t.fsContext = oldFSContext.Fork() } t.mu.Unlock() - if oldfds != nil { - oldfds.DecRef() + if oldFDTable != nil { + oldFDTable.DecRef() } - if oldfsc != nil { - oldfsc.DecRef() + if oldFSContext != nil { + oldFSContext.DecRef() } return nil } diff --git a/pkg/sentry/kernel/task_context.go b/pkg/sentry/kernel/task_context.go index bbd294141..54b1676b0 100644 --- a/pkg/sentry/kernel/task_context.go +++ b/pkg/sentry/kernel/task_context.go @@ -17,16 +17,16 @@ package kernel import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/cpuid" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/futex" - "gvisor.googlesource.com/gvisor/pkg/sentry/loader" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/futex" + "gvisor.dev/gvisor/pkg/sentry/loader" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" ) var errNoSyscalls = syserr.New("no syscall table found", linux.ENOEXEC) diff --git a/pkg/sentry/kernel/task_exec.go b/pkg/sentry/kernel/task_exec.go index 35d5cb90c..17a089b90 100644 --- a/pkg/sentry/kernel/task_exec.go +++ b/pkg/sentry/kernel/task_exec.go @@ -65,11 +65,11 @@ package kernel // """ import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/syserror" ) // execStop is a TaskStop that a task sets on itself when it wants to execve @@ -195,7 +195,7 @@ func (r *runSyscallAfterExecStop) execute(t *Task) taskRunState { t.tg.pidns.owner.mu.Unlock() // Remove FDs with the CloseOnExec flag set. - t.fds.RemoveIf(func(file *fs.File, flags FDFlags) bool { + t.fdTable.RemoveIf(func(file *fs.File, flags FDFlags) bool { return flags.CloseOnExec }) diff --git a/pkg/sentry/kernel/task_exit.go b/pkg/sentry/kernel/task_exit.go index 158e665d3..535f03e50 100644 --- a/pkg/sentry/kernel/task_exit.go +++ b/pkg/sentry/kernel/task_exit.go @@ -29,11 +29,11 @@ import ( "fmt" "strconv" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // An ExitStatus is a value communicated from an exiting task or thread group @@ -265,8 +265,8 @@ func (*runExitMain) execute(t *Task) taskRunState { // Releasing the MM unblocks a blocked CLONE_VFORK parent. t.unstopVforkParent() - t.fsc.DecRef() - t.fds.DecRef() + t.fsContext.DecRef() + t.fdTable.DecRef() // If this is the last task to exit from the thread group, release the // thread group's resources. diff --git a/pkg/sentry/kernel/task_futex.go b/pkg/sentry/kernel/task_futex.go index f98097c2c..c211b5b74 100644 --- a/pkg/sentry/kernel/task_futex.go +++ b/pkg/sentry/kernel/task_futex.go @@ -15,8 +15,8 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/futex" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/kernel/futex" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // Futex returns t's futex manager. @@ -34,14 +34,14 @@ func (t *Task) SwapUint32(addr usermem.Addr, new uint32) (uint32, error) { }) } -// CompareAndSwapUint32 implemets futex.Target.CompareAndSwapUint32. +// CompareAndSwapUint32 implements futex.Target.CompareAndSwapUint32. func (t *Task) CompareAndSwapUint32(addr usermem.Addr, old, new uint32) (uint32, error) { return t.MemoryManager().CompareAndSwapUint32(t, addr, old, new, usermem.IOOpts{ AddressSpaceActive: true, }) } -// LoadUint32 implemets futex.Target.LoadUint32. +// LoadUint32 implements futex.Target.LoadUint32. func (t *Task) LoadUint32(addr usermem.Addr) (uint32, error) { return t.MemoryManager().LoadUint32(t, addr, usermem.IOOpts{ AddressSpaceActive: true, diff --git a/pkg/sentry/kernel/task_identity.go b/pkg/sentry/kernel/task_identity.go index ec95f78d0..78ff14b20 100644 --- a/pkg/sentry/kernel/task_identity.go +++ b/pkg/sentry/kernel/task_identity.go @@ -15,40 +15,32 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/syserror" ) // Credentials returns t's credentials. // // This value must be considered immutable. func (t *Task) Credentials() *auth.Credentials { - t.mu.Lock() - defer t.mu.Unlock() - return t.creds + return t.creds.Load() } // UserNamespace returns the user namespace associated with the task. func (t *Task) UserNamespace() *auth.UserNamespace { - t.mu.Lock() - defer t.mu.Unlock() - return t.creds.UserNamespace + return t.Credentials().UserNamespace } // HasCapabilityIn checks if the task has capability cp in user namespace ns. func (t *Task) HasCapabilityIn(cp linux.Capability, ns *auth.UserNamespace) bool { - t.mu.Lock() - defer t.mu.Unlock() - return t.creds.HasCapabilityIn(cp, ns) + return t.Credentials().HasCapabilityIn(cp, ns) } // HasCapability checks if the task has capability cp in its user namespace. func (t *Task) HasCapability(cp linux.Capability) bool { - t.mu.Lock() - defer t.mu.Unlock() - return t.creds.HasCapability(cp) + return t.Credentials().HasCapability(cp) } // SetUID implements the semantics of setuid(2). @@ -57,9 +49,12 @@ func (t *Task) SetUID(uid auth.UID) error { if !uid.Ok() { return syserror.EINVAL } + t.mu.Lock() defer t.mu.Unlock() - kuid := t.creds.UserNamespace.MapToKUID(uid) + + creds := t.Credentials() + kuid := creds.UserNamespace.MapToKUID(uid) if !kuid.Ok() { return syserror.EINVAL } @@ -67,17 +62,17 @@ func (t *Task) SetUID(uid auth.UID) error { // effective UID of the caller is root (more precisely: if the caller has // the CAP_SETUID capability), the real UID and saved set-user-ID are also // set." - setuid(2) - if t.creds.HasCapability(linux.CAP_SETUID) { + if creds.HasCapability(linux.CAP_SETUID) { t.setKUIDsUncheckedLocked(kuid, kuid, kuid) return nil } // "EPERM: The user is not privileged (Linux: does not have the CAP_SETUID // capability) and uid does not match the real UID or saved set-user-ID of // the calling process." - if kuid != t.creds.RealKUID && kuid != t.creds.SavedKUID { + if kuid != creds.RealKUID && kuid != creds.SavedKUID { return syserror.EPERM } - t.setKUIDsUncheckedLocked(t.creds.RealKUID, kuid, t.creds.SavedKUID) + t.setKUIDsUncheckedLocked(creds.RealKUID, kuid, creds.SavedKUID) return nil } @@ -87,37 +82,38 @@ func (t *Task) SetREUID(r, e auth.UID) error { defer t.mu.Unlock() // "Supplying a value of -1 for either the real or effective user ID forces // the system to leave that ID unchanged." - setreuid(2) - newR := t.creds.RealKUID + creds := t.Credentials() + newR := creds.RealKUID if r.Ok() { - newR = t.creds.UserNamespace.MapToKUID(r) + newR = creds.UserNamespace.MapToKUID(r) if !newR.Ok() { return syserror.EINVAL } } - newE := t.creds.EffectiveKUID + newE := creds.EffectiveKUID if e.Ok() { - newE = t.creds.UserNamespace.MapToKUID(e) + newE = creds.UserNamespace.MapToKUID(e) if !newE.Ok() { return syserror.EINVAL } } - if !t.creds.HasCapability(linux.CAP_SETUID) { + if !creds.HasCapability(linux.CAP_SETUID) { // "Unprivileged processes may only set the effective user ID to the // real user ID, the effective user ID, or the saved set-user-ID." - if newE != t.creds.RealKUID && newE != t.creds.EffectiveKUID && newE != t.creds.SavedKUID { + if newE != creds.RealKUID && newE != creds.EffectiveKUID && newE != creds.SavedKUID { return syserror.EPERM } // "Unprivileged users may only set the real user ID to the real user // ID or the effective user ID." - if newR != t.creds.RealKUID && newR != t.creds.EffectiveKUID { + if newR != creds.RealKUID && newR != creds.EffectiveKUID { return syserror.EPERM } } // "If the real user ID is set (i.e., ruid is not -1) or the effective user // ID is set to a value not equal to the previous real user ID, the saved // set-user-ID will be set to the new effective user ID." - newS := t.creds.SavedKUID - if r.Ok() || (e.Ok() && newE != t.creds.EffectiveKUID) { + newS := creds.SavedKUID + if r.Ok() || (e.Ok() && newE != creds.EffectiveKUID) { newS = newE } t.setKUIDsUncheckedLocked(newR, newE, newS) @@ -136,23 +132,24 @@ func (t *Task) SetRESUID(r, e, s auth.UID) error { // arguments equals -1, the corresponding value is not changed." - // setresuid(2) var err error - newR := t.creds.RealKUID + creds := t.Credentials() + newR := creds.RealKUID if r.Ok() { - newR, err = t.creds.UseUID(r) + newR, err = creds.UseUID(r) if err != nil { return err } } - newE := t.creds.EffectiveKUID + newE := creds.EffectiveKUID if e.Ok() { - newE, err = t.creds.UseUID(e) + newE, err = creds.UseUID(e) if err != nil { return err } } - newS := t.creds.SavedKUID + newS := creds.SavedKUID if s.Ok() { - newS, err = t.creds.UseUID(s) + newS, err = creds.UseUID(s) if err != nil { return err } @@ -163,10 +160,10 @@ func (t *Task) SetRESUID(r, e, s auth.UID) error { // Preconditions: t.mu must be locked. func (t *Task) setKUIDsUncheckedLocked(newR, newE, newS auth.KUID) { - root := t.creds.UserNamespace.MapToKUID(auth.RootUID) - oldR, oldE, oldS := t.creds.RealKUID, t.creds.EffectiveKUID, t.creds.SavedKUID - t.creds = t.creds.Fork() // See doc for creds. - t.creds.RealKUID, t.creds.EffectiveKUID, t.creds.SavedKUID = newR, newE, newS + creds := t.Credentials().Fork() // The credentials object is immutable. See doc for creds. + root := creds.UserNamespace.MapToKUID(auth.RootUID) + oldR, oldE, oldS := creds.RealKUID, creds.EffectiveKUID, creds.SavedKUID + creds.RealKUID, creds.EffectiveKUID, creds.SavedKUID = newR, newE, newS // "1. If one or more of the real, effective or saved set user IDs was // previously 0, and as a result of the UID changes all of these IDs have a @@ -184,9 +181,9 @@ func (t *Task) setKUIDsUncheckedLocked(newR, newE, newS auth.KUID) { // being cleared." (A thread's effective capability set is always // cleared when such a credential change is made, // regardless of the setting of the "keep capabilities" flag.) - if !t.creds.KeepCaps { - t.creds.PermittedCaps = 0 - t.creds.EffectiveCaps = 0 + if !creds.KeepCaps { + creds.PermittedCaps = 0 + creds.EffectiveCaps = 0 } } // """ @@ -197,9 +194,9 @@ func (t *Task) setKUIDsUncheckedLocked(newR, newE, newS auth.KUID) { // permitted set is copied to the effective set. // """ if oldE == root && newE != root { - t.creds.EffectiveCaps = 0 + creds.EffectiveCaps = 0 } else if oldE != root && newE == root { - t.creds.EffectiveCaps = t.creds.PermittedCaps + creds.EffectiveCaps = creds.PermittedCaps } // "4. If the filesystem user ID is changed from 0 to nonzero (see // setfsuid(2)), then the following capabilities are cleared from the @@ -220,6 +217,7 @@ func (t *Task) setKUIDsUncheckedLocked(newR, newE, newS auth.KUID) { // Not documented, but compare Linux's kernel/cred.c:commit_creds(). t.parentDeathSignal = 0 } + t.creds.Store(creds) } // SetGID implements the semantics of setgid(2). @@ -227,20 +225,23 @@ func (t *Task) SetGID(gid auth.GID) error { if !gid.Ok() { return syserror.EINVAL } + t.mu.Lock() defer t.mu.Unlock() - kgid := t.creds.UserNamespace.MapToKGID(gid) + + creds := t.Credentials() + kgid := creds.UserNamespace.MapToKGID(gid) if !kgid.Ok() { return syserror.EINVAL } - if t.creds.HasCapability(linux.CAP_SETGID) { + if creds.HasCapability(linux.CAP_SETGID) { t.setKGIDsUncheckedLocked(kgid, kgid, kgid) return nil } - if kgid != t.creds.RealKGID && kgid != t.creds.SavedKGID { + if kgid != creds.RealKGID && kgid != creds.SavedKGID { return syserror.EPERM } - t.setKGIDsUncheckedLocked(t.creds.RealKGID, kgid, t.creds.SavedKGID) + t.setKGIDsUncheckedLocked(creds.RealKGID, kgid, creds.SavedKGID) return nil } @@ -248,30 +249,32 @@ func (t *Task) SetGID(gid auth.GID) error { func (t *Task) SetREGID(r, e auth.GID) error { t.mu.Lock() defer t.mu.Unlock() - newR := t.creds.RealKGID + + creds := t.Credentials() + newR := creds.RealKGID if r.Ok() { - newR = t.creds.UserNamespace.MapToKGID(r) + newR = creds.UserNamespace.MapToKGID(r) if !newR.Ok() { return syserror.EINVAL } } - newE := t.creds.EffectiveKGID + newE := creds.EffectiveKGID if e.Ok() { - newE = t.creds.UserNamespace.MapToKGID(e) + newE = creds.UserNamespace.MapToKGID(e) if !newE.Ok() { return syserror.EINVAL } } - if !t.creds.HasCapability(linux.CAP_SETGID) { - if newE != t.creds.RealKGID && newE != t.creds.EffectiveKGID && newE != t.creds.SavedKGID { + if !creds.HasCapability(linux.CAP_SETGID) { + if newE != creds.RealKGID && newE != creds.EffectiveKGID && newE != creds.SavedKGID { return syserror.EPERM } - if newR != t.creds.RealKGID && newR != t.creds.EffectiveKGID { + if newR != creds.RealKGID && newR != creds.EffectiveKGID { return syserror.EPERM } } - newS := t.creds.SavedKGID - if r.Ok() || (e.Ok() && newE != t.creds.EffectiveKGID) { + newS := creds.SavedKGID + if r.Ok() || (e.Ok() && newE != creds.EffectiveKGID) { newS = newE } t.setKGIDsUncheckedLocked(newR, newE, newS) @@ -280,26 +283,29 @@ func (t *Task) SetREGID(r, e auth.GID) error { // SetRESGID implements the semantics of the setresgid(2) syscall. func (t *Task) SetRESGID(r, e, s auth.GID) error { + var err error + t.mu.Lock() defer t.mu.Unlock() - var err error - newR := t.creds.RealKGID + + creds := t.Credentials() + newR := creds.RealKGID if r.Ok() { - newR, err = t.creds.UseGID(r) + newR, err = creds.UseGID(r) if err != nil { return err } } - newE := t.creds.EffectiveKGID + newE := creds.EffectiveKGID if e.Ok() { - newE, err = t.creds.UseGID(e) + newE, err = creds.UseGID(e) if err != nil { return err } } - newS := t.creds.SavedKGID + newS := creds.SavedKGID if s.Ok() { - newS, err = t.creds.UseGID(s) + newS, err = creds.UseGID(s) if err != nil { return err } @@ -309,9 +315,9 @@ func (t *Task) SetRESGID(r, e, s auth.GID) error { } func (t *Task) setKGIDsUncheckedLocked(newR, newE, newS auth.KGID) { - oldE := t.creds.EffectiveKGID - t.creds = t.creds.Fork() // See doc for creds. - t.creds.RealKGID, t.creds.EffectiveKGID, t.creds.SavedKGID = newR, newE, newS + creds := t.Credentials().Fork() // The credentials object is immutable. See doc for creds. + oldE := creds.EffectiveKGID + creds.RealKGID, creds.EffectiveKGID, creds.SavedKGID = newR, newE, newS if oldE != newE { // "[dumpability] is reset to the current value contained in @@ -327,6 +333,7 @@ func (t *Task) setKGIDsUncheckedLocked(newR, newE, newS auth.KGID) { // kernel/cred.c:commit_creds(). t.parentDeathSignal = 0 } + t.creds.Store(creds) } // SetExtraGIDs attempts to change t's supplemental groups. All IDs are @@ -334,19 +341,21 @@ func (t *Task) setKGIDsUncheckedLocked(newR, newE, newS auth.KGID) { func (t *Task) SetExtraGIDs(gids []auth.GID) error { t.mu.Lock() defer t.mu.Unlock() - if !t.creds.HasCapability(linux.CAP_SETGID) { + creds := t.Credentials() + if !creds.HasCapability(linux.CAP_SETGID) { return syserror.EPERM } kgids := make([]auth.KGID, len(gids)) for i, gid := range gids { - kgid := t.creds.UserNamespace.MapToKGID(gid) + kgid := creds.UserNamespace.MapToKGID(gid) if !kgid.Ok() { return syserror.EINVAL } kgids[i] = kgid } - t.creds = t.creds.Fork() // See doc for creds. - t.creds.ExtraKGIDs = kgids + creds = creds.Fork() // The credentials object is immutable. See doc for creds. + creds.ExtraKGIDs = kgids + t.creds.Store(creds) return nil } @@ -360,27 +369,29 @@ func (t *Task) SetCapabilitySets(permitted, inheritable, effective auth.Capabili if effective & ^permitted != 0 { return syserror.EPERM } + creds := t.Credentials() // "It is also a limiting superset for the capabilities that may be added // to the inheritable set by a thread that does not have the CAP_SETPCAP // capability in its effective set." - if !t.creds.HasCapability(linux.CAP_SETPCAP) && (inheritable & ^(t.creds.InheritableCaps|t.creds.PermittedCaps) != 0) { + if !creds.HasCapability(linux.CAP_SETPCAP) && (inheritable & ^(creds.InheritableCaps|creds.PermittedCaps) != 0) { return syserror.EPERM } // "If a thread drops a capability from its permitted set, it can never // reacquire that capability (unless it execve(2)s ..." - if permitted & ^t.creds.PermittedCaps != 0 { + if permitted & ^creds.PermittedCaps != 0 { return syserror.EPERM } // "... if a capability is not in the bounding set, then a thread can't add // this capability to its inheritable set, even if it was in its permitted // capabilities ..." - if inheritable & ^(t.creds.InheritableCaps|t.creds.BoundingCaps) != 0 { + if inheritable & ^(creds.InheritableCaps|creds.BoundingCaps) != 0 { return syserror.EPERM } - t.creds = t.creds.Fork() // See doc for creds. - t.creds.PermittedCaps = permitted - t.creds.InheritableCaps = inheritable - t.creds.EffectiveCaps = effective + creds = creds.Fork() // The credentials object is immutable. See doc for creds. + creds.PermittedCaps = permitted + creds.InheritableCaps = inheritable + creds.EffectiveCaps = effective + t.creds.Store(creds) return nil } @@ -389,11 +400,13 @@ func (t *Task) SetCapabilitySets(permitted, inheritable, effective auth.Capabili func (t *Task) DropBoundingCapability(cp linux.Capability) error { t.mu.Lock() defer t.mu.Unlock() - if !t.creds.HasCapability(linux.CAP_SETPCAP) { + creds := t.Credentials() + if !creds.HasCapability(linux.CAP_SETPCAP) { return syserror.EPERM } - t.creds = t.creds.Fork() // See doc for creds. - t.creds.BoundingCaps &^= auth.CapabilitySetOf(cp) + creds = creds.Fork() // The credentials object is immutable. See doc for creds. + creds.BoundingCaps &^= auth.CapabilitySetOf(cp) + t.creds.Store(creds) return nil } @@ -402,31 +415,33 @@ func (t *Task) SetUserNamespace(ns *auth.UserNamespace) error { t.mu.Lock() defer t.mu.Unlock() + creds := t.Credentials() // "A process reassociating itself with a user namespace must have the // CAP_SYS_ADMIN capability in the target user namespace." - setns(2) // // If t just created ns, then t.creds is guaranteed to have CAP_SYS_ADMIN // in ns (by rule 3 in auth.Credentials.HasCapability). - if !t.creds.HasCapabilityIn(linux.CAP_SYS_ADMIN, ns) { + if !creds.HasCapabilityIn(linux.CAP_SYS_ADMIN, ns) { return syserror.EPERM } - t.creds = t.creds.Fork() // See doc for creds. - t.creds.UserNamespace = ns + creds = creds.Fork() // The credentials object is immutable. See doc for creds. + creds.UserNamespace = ns // "The child process created by clone(2) with the CLONE_NEWUSER flag // starts out with a complete set of capabilities in the new user // namespace. Likewise, a process that creates a new user namespace using // unshare(2) or joins an existing user namespace using setns(2) gains a // full set of capabilities in that namespace." - t.creds.PermittedCaps = auth.AllCapabilities - t.creds.InheritableCaps = 0 - t.creds.EffectiveCaps = auth.AllCapabilities - t.creds.BoundingCaps = auth.AllCapabilities + creds.PermittedCaps = auth.AllCapabilities + creds.InheritableCaps = 0 + creds.EffectiveCaps = auth.AllCapabilities + creds.BoundingCaps = auth.AllCapabilities // "A call to clone(2), unshare(2), or setns(2) using the CLONE_NEWUSER // flag sets the "securebits" flags (see capabilities(7)) to their default // values (all flags disabled) in the child (for clone(2)) or caller (for // unshare(2), or setns(2)." - user_namespaces(7) - t.creds.KeepCaps = false + creds.KeepCaps = false + t.creds.Store(creds) return nil } @@ -435,8 +450,9 @@ func (t *Task) SetUserNamespace(ns *auth.UserNamespace) error { func (t *Task) SetKeepCaps(k bool) { t.mu.Lock() defer t.mu.Unlock() - t.creds = t.creds.Fork() // See doc for creds. - t.creds.KeepCaps = k + creds := t.Credentials().Fork() // The credentials object is immutable. See doc for creds. + creds.KeepCaps = k + t.creds.Store(creds) } // updateCredsForExec updates t.creds to reflect an execve(). @@ -512,15 +528,16 @@ func (t *Task) updateCredsForExecLocked() { // the effective user ID. var newPermitted auth.CapabilitySet // since F(inheritable) == F(permitted) == 0 fileEffective := false - root := t.creds.UserNamespace.MapToKUID(auth.RootUID) - if t.creds.EffectiveKUID == root || t.creds.RealKUID == root { - newPermitted = t.creds.InheritableCaps | t.creds.BoundingCaps - if t.creds.EffectiveKUID == root { + creds := t.Credentials() + root := creds.UserNamespace.MapToKUID(auth.RootUID) + if creds.EffectiveKUID == root || creds.RealKUID == root { + newPermitted = creds.InheritableCaps | creds.BoundingCaps + if creds.EffectiveKUID == root { fileEffective = true } } - t.creds = t.creds.Fork() // See doc for creds. + creds = creds.Fork() // The credentials object is immutable. See doc for creds. // Now we enter poorly-documented, somewhat confusing territory. (The // accompanying comment in Linux's security/commoncap.c:cap_bprm_set_creds @@ -562,27 +579,28 @@ func (t *Task) updateCredsForExecLocked() { // But since no_new_privs is always set (A3 is always true), this becomes // much simpler. If B1 and B2 are false, C2 is a no-op. If B3 is false, C1 // is a no-op. So we can just do C1 and C2 unconditionally. - if t.creds.EffectiveKUID != t.creds.RealKUID || t.creds.EffectiveKGID != t.creds.RealKGID { - t.creds.EffectiveKUID = t.creds.RealKUID - t.creds.EffectiveKGID = t.creds.RealKGID + if creds.EffectiveKUID != creds.RealKUID || creds.EffectiveKGID != creds.RealKGID { + creds.EffectiveKUID = creds.RealKUID + creds.EffectiveKGID = creds.RealKGID t.parentDeathSignal = 0 } // (Saved set-user-ID is always set to the new effective user ID, and saved // set-group-ID is always set to the new effective group ID, regardless of // the above.) - t.creds.SavedKUID = t.creds.RealKUID - t.creds.SavedKGID = t.creds.RealKGID - t.creds.PermittedCaps &= newPermitted + creds.SavedKUID = creds.RealKUID + creds.SavedKGID = creds.RealKGID + creds.PermittedCaps &= newPermitted if fileEffective { - t.creds.EffectiveCaps = t.creds.PermittedCaps + creds.EffectiveCaps = creds.PermittedCaps } else { - t.creds.EffectiveCaps = 0 + creds.EffectiveCaps = 0 } // prctl(2): The "keep capabilities" value will be reset to 0 on subsequent // calls to execve(2). - t.creds.KeepCaps = false + creds.KeepCaps = false // "The bounding set is inherited at fork(2) from the thread's parent, and // is preserved across an execve(2)". So we're done. + t.creds.Store(creds) } diff --git a/pkg/sentry/kernel/task_log.go b/pkg/sentry/kernel/task_log.go index e0e57e8bd..a29e9b9eb 100644 --- a/pkg/sentry/kernel/task_log.go +++ b/pkg/sentry/kernel/task_log.go @@ -18,8 +18,8 @@ import ( "fmt" "sort" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) const ( @@ -63,7 +63,7 @@ func (t *Task) DebugDumpState() { if mm := t.MemoryManager(); mm != nil { t.Debugf("Mappings:\n%s", mm) } - t.Debugf("FDMap:\n%s", t.fds) + t.Debugf("FDTable:\n%s", t.fdTable) } // debugDumpRegisters logs register state at log level debug. diff --git a/pkg/sentry/kernel/task_net.go b/pkg/sentry/kernel/task_net.go index 04c684c1a..172a31e1d 100644 --- a/pkg/sentry/kernel/task_net.go +++ b/pkg/sentry/kernel/task_net.go @@ -15,7 +15,7 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/inet" ) // IsNetworkNamespaced returns true if t is in a non-root network namespace. diff --git a/pkg/sentry/kernel/task_run.go b/pkg/sentry/kernel/task_run.go index a79101a18..c92266c59 100644 --- a/pkg/sentry/kernel/task_run.go +++ b/pkg/sentry/kernel/task_run.go @@ -19,13 +19,13 @@ import ( "runtime" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/hostcpu" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/hostcpu" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // A taskRunState is a reified state in the task state machine. See README.md diff --git a/pkg/sentry/kernel/task_sched.go b/pkg/sentry/kernel/task_sched.go index 1c94ab11b..e76c069b0 100644 --- a/pkg/sentry/kernel/task_sched.go +++ b/pkg/sentry/kernel/task_sched.go @@ -22,13 +22,13 @@ import ( "sync/atomic" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/hostcpu" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/sched" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/hostcpu" + "gvisor.dev/gvisor/pkg/sentry/kernel/sched" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/syserror" ) // TaskGoroutineState is a coarse representation of the current execution diff --git a/pkg/sentry/kernel/task_signals.go b/pkg/sentry/kernel/task_signals.go index 654cf7525..266959a07 100644 --- a/pkg/sentry/kernel/task_signals.go +++ b/pkg/sentry/kernel/task_signals.go @@ -21,13 +21,13 @@ import ( "sync/atomic" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/eventchannel" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - ucspb "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/uncaught_signal_go_proto" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/eventchannel" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + ucspb "gvisor.dev/gvisor/pkg/sentry/kernel/uncaught_signal_go_proto" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // SignalAction is an internal signal action. diff --git a/pkg/sentry/kernel/task_start.go b/pkg/sentry/kernel/task_start.go index b67251d5b..d60cd62c7 100644 --- a/pkg/sentry/kernel/task_start.go +++ b/pkg/sentry/kernel/task_start.go @@ -15,13 +15,13 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/futex" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/sched" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/kernel/futex" + "gvisor.dev/gvisor/pkg/sentry/kernel/sched" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/syserror" ) // TaskConfig defines the configuration of a new Task (see below). @@ -52,9 +52,10 @@ type TaskConfig struct { // succeeds. FSContext *FSContext - // FDMap is the FDMap of the new task. A reference must be held on FDMap, - // which is transferred to TaskSet.NewTask whether or not it succeeds. - FDMap *FDMap + // FDTable is the FDTableof the new task. A reference must be held on + // FDMap, which is transferred to TaskSet.NewTask whether or not it + // succeeds. + FDTable *FDTable // Credentials is the Credentials of the new task. Credentials *auth.Credentials @@ -90,7 +91,7 @@ func (ts *TaskSet) NewTask(cfg *TaskConfig) (*Task, error) { if err != nil { cfg.TaskContext.release() cfg.FSContext.DecRef() - cfg.FDMap.DecRef() + cfg.FDTable.DecRef() return nil, err } return t, nil @@ -112,14 +113,13 @@ func (ts *TaskSet) newTask(cfg *TaskConfig) (*Task, error) { signalMask: cfg.SignalMask, signalStack: arch.SignalStack{Flags: arch.SignalStackFlagDisable}, tc: *tc, - fsc: cfg.FSContext, - fds: cfg.FDMap, + fsContext: cfg.FSContext, + fdTable: cfg.FDTable, p: cfg.Kernel.Platform.NewContext(), k: cfg.Kernel, ptraceTracees: make(map[*Task]struct{}), allowedCPUMask: cfg.AllowedCPUMask.Copy(), ioUsage: &usage.IO{}, - creds: cfg.Credentials, niceness: cfg.Niceness, netns: cfg.NetworkNamespaced, utsns: cfg.UTSNamespace, @@ -129,6 +129,7 @@ func (ts *TaskSet) newTask(cfg *TaskConfig) (*Task, error) { futexWaiter: futex.NewWaiter(), containerID: cfg.ContainerID, } + t.creds.Store(cfg.Credentials) t.endStopCond.L = &t.tg.signalHandlers.mu t.ptraceTracer.Store((*Task)(nil)) // We don't construct t.blockingTimer until Task.run(); see that function @@ -260,7 +261,7 @@ func (ns *PIDNamespace) allocateTID() (ThreadID, error) { return true } return false - } () + }() if !tidInUse { ns.last = tid diff --git a/pkg/sentry/kernel/task_stop.go b/pkg/sentry/kernel/task_stop.go index e735a5dd0..10c6e455c 100644 --- a/pkg/sentry/kernel/task_stop.go +++ b/pkg/sentry/kernel/task_stop.go @@ -172,7 +172,7 @@ func (t *Task) beginStopLocked() { } } -// endStopLocked decerements t.stopCount to indicate that an existing internal +// endStopLocked decrements t.stopCount to indicate that an existing internal // or external stop no longer applies to t. // // Preconditions: The signal mutex must be locked. diff --git a/pkg/sentry/kernel/task_syscall.go b/pkg/sentry/kernel/task_syscall.go index a9283d0df..b543d536a 100644 --- a/pkg/sentry/kernel/task_syscall.go +++ b/pkg/sentry/kernel/task_syscall.go @@ -19,13 +19,13 @@ import ( "os" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/bits" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/bits" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // SyscallRestartErrno represents a ERESTART* errno defined in the Linux's kernel diff --git a/pkg/sentry/kernel/task_test.go b/pkg/sentry/kernel/task_test.go index b895361d0..cfcde9a7a 100644 --- a/pkg/sentry/kernel/task_test.go +++ b/pkg/sentry/kernel/task_test.go @@ -17,7 +17,7 @@ package kernel import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/sched" + "gvisor.dev/gvisor/pkg/sentry/kernel/sched" ) func TestTaskCPU(t *testing.T) { diff --git a/pkg/sentry/kernel/task_usermem.go b/pkg/sentry/kernel/task_usermem.go index 461bd7316..518bfe1bd 100644 --- a/pkg/sentry/kernel/task_usermem.go +++ b/pkg/sentry/kernel/task_usermem.go @@ -17,9 +17,9 @@ package kernel import ( "math" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // MAX_RW_COUNT is the maximum size in bytes of a single read or write. diff --git a/pkg/sentry/kernel/thread_group.go b/pkg/sentry/kernel/thread_group.go index 8bd53928e..2a97e3e8e 100644 --- a/pkg/sentry/kernel/thread_group.go +++ b/pkg/sentry/kernel/thread_group.go @@ -18,10 +18,11 @@ import ( "sync" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/fs" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/usage" ) // A ThreadGroup is a logical grouping of tasks that has widespread @@ -236,13 +237,21 @@ type ThreadGroup struct { // rscr is the thread group's RSEQ critical region. rscr atomic.Value `state:".(*RSEQCriticalRegion)"` + + // mounts is the thread group's mount namespace. This does not really + // correspond to a "mount namespace" in Linux, but is more like a + // complete VFS that need not be shared between processes. See the + // comment in mounts.go for more information. + // + // mounts is immutable. + mounts *fs.MountNamespace } // newThreadGroup returns a new, empty thread group in PID namespace ns. The // thread group leader will send its parent terminationSignal when it exits. // The new thread group isn't visible to the system until a task has been // created inside of it by a successful call to TaskSet.NewTask. -func (k *Kernel) newThreadGroup(ns *PIDNamespace, sh *SignalHandlers, terminationSignal linux.Signal, limits *limits.LimitSet, monotonicClock *timekeeperClock) *ThreadGroup { +func (k *Kernel) newThreadGroup(mounts *fs.MountNamespace, ns *PIDNamespace, sh *SignalHandlers, terminationSignal linux.Signal, limits *limits.LimitSet, monotonicClock *timekeeperClock) *ThreadGroup { tg := &ThreadGroup{ threadGroupNode: threadGroupNode{ pidns: ns, @@ -251,6 +260,7 @@ func (k *Kernel) newThreadGroup(ns *PIDNamespace, sh *SignalHandlers, terminatio terminationSignal: terminationSignal, ioUsage: &usage.IO{}, limits: limits, + mounts: mounts, } tg.itimerRealTimer = ktime.NewTimer(k.monotonicClock, &itimerRealListener{tg: tg}) tg.timers = make(map[linux.TimerID]*IntervalTimer) @@ -258,7 +268,7 @@ func (k *Kernel) newThreadGroup(ns *PIDNamespace, sh *SignalHandlers, terminatio return tg } -// saveRscr is invopked by stateify. +// saveRscr is invoked by stateify. func (tg *ThreadGroup) saveRscr() *RSEQCriticalRegion { return tg.rscr.Load().(*RSEQCriticalRegion) } @@ -298,6 +308,7 @@ func (tg *ThreadGroup) release() { for _, it := range its { it.DestroyTimer() } + tg.mounts.DecRef() } // forEachChildThreadGroupLocked indicates over all child ThreadGroups. diff --git a/pkg/sentry/kernel/threads.go b/pkg/sentry/kernel/threads.go index 656bbd46c..b21b182fc 100644 --- a/pkg/sentry/kernel/threads.go +++ b/pkg/sentry/kernel/threads.go @@ -18,8 +18,8 @@ import ( "fmt" "sync" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/waiter" ) // TasksLimit is the maximum number of threads for untrusted application. diff --git a/pkg/sentry/kernel/time/BUILD b/pkg/sentry/kernel/time/BUILD index 584f7c7cc..9beae4b31 100644 --- a/pkg/sentry/kernel/time/BUILD +++ b/pkg/sentry/kernel/time/BUILD @@ -8,7 +8,7 @@ go_library( "context.go", "time.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time", + importpath = "gvisor.dev/gvisor/pkg/sentry/kernel/time", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/kernel/time/context.go b/pkg/sentry/kernel/time/context.go index c0660d362..8ef483dd3 100644 --- a/pkg/sentry/kernel/time/context.go +++ b/pkg/sentry/kernel/time/context.go @@ -15,7 +15,7 @@ package time import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) // contextID is the time package's type for context.Context.Value keys. diff --git a/pkg/sentry/kernel/time/time.go b/pkg/sentry/kernel/time/time.go index 3846cf1ea..aa6c75d25 100644 --- a/pkg/sentry/kernel/time/time.go +++ b/pkg/sentry/kernel/time/time.go @@ -22,9 +22,9 @@ import ( "sync" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // Events that may be generated by a Clock. @@ -142,6 +142,11 @@ func (t Time) Timeval() linux.Timeval { return linux.NsecToTimeval(t.Nanoseconds()) } +// StatxTimestamp converts Time to a Linux statx_timestamp. +func (t Time) StatxTimestamp() linux.StatxTimestamp { + return linux.NsecToStatxTimestamp(t.Nanoseconds()) +} + // Add adds the duration of d to t. func (t Time) Add(d time.Duration) Time { if t.ns > 0 && d.Nanoseconds() > math.MaxInt64-int64(t.ns) { diff --git a/pkg/sentry/kernel/timekeeper.go b/pkg/sentry/kernel/timekeeper.go index 505a4fa4f..76417342a 100644 --- a/pkg/sentry/kernel/timekeeper.go +++ b/pkg/sentry/kernel/timekeeper.go @@ -19,11 +19,11 @@ import ( "sync" "time" - "gvisor.googlesource.com/gvisor/pkg/log" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - sentrytime "gvisor.googlesource.com/gvisor/pkg/sentry/time" + "gvisor.dev/gvisor/pkg/log" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + sentrytime "gvisor.dev/gvisor/pkg/sentry/time" ) // Timekeeper manages all of the kernel clocks. @@ -122,7 +122,7 @@ func (t *Timekeeper) SetClocks(c sentrytime.Clocks) { // // In a restored sentry, monotonic time jumps forward by approximately // the same amount as real time. There are no guarantees here, we are - // just making a best-effort attempt to to make it appear that the app + // just making a best-effort attempt to make it appear that the app // was simply not scheduled for a long period, rather than that the // real time clock was changed. // diff --git a/pkg/sentry/kernel/timekeeper_state.go b/pkg/sentry/kernel/timekeeper_state.go index 6ce358a05..8e961c832 100644 --- a/pkg/sentry/kernel/timekeeper_state.go +++ b/pkg/sentry/kernel/timekeeper_state.go @@ -15,7 +15,7 @@ package kernel import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/time" + "gvisor.dev/gvisor/pkg/sentry/time" ) // beforeSave is invoked by stateify. diff --git a/pkg/sentry/kernel/timekeeper_test.go b/pkg/sentry/kernel/timekeeper_test.go index a92ad689e..849c5b646 100644 --- a/pkg/sentry/kernel/timekeeper_test.go +++ b/pkg/sentry/kernel/timekeeper_test.go @@ -17,12 +17,12 @@ package kernel import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - sentrytime "gvisor.googlesource.com/gvisor/pkg/sentry/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + sentrytime "gvisor.dev/gvisor/pkg/sentry/time" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // mockClocks is a sentrytime.Clocks that simply returns the times in the diff --git a/pkg/sentry/kernel/uts_namespace.go b/pkg/sentry/kernel/uts_namespace.go index 96fe3cbb9..0a563e715 100644 --- a/pkg/sentry/kernel/uts_namespace.go +++ b/pkg/sentry/kernel/uts_namespace.go @@ -17,7 +17,7 @@ package kernel import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" ) // UTSNamespace represents a UTS namespace, a holder of two system identifiers: diff --git a/pkg/sentry/kernel/vdso.go b/pkg/sentry/kernel/vdso.go index d40ad74f4..fdd10c56c 100644 --- a/pkg/sentry/kernel/vdso.go +++ b/pkg/sentry/kernel/vdso.go @@ -17,11 +17,11 @@ package kernel import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // vdsoParams are the parameters exposed to the VDSO. diff --git a/pkg/sentry/limits/BUILD b/pkg/sentry/limits/BUILD index 800166675..40025d62d 100644 --- a/pkg/sentry/limits/BUILD +++ b/pkg/sentry/limits/BUILD @@ -9,7 +9,7 @@ go_library( "limits.go", "linux.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/limits", + importpath = "gvisor.dev/gvisor/pkg/sentry/limits", visibility = ["//:sandbox"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/limits/context.go b/pkg/sentry/limits/context.go index 9200edb52..6972749ed 100644 --- a/pkg/sentry/limits/context.go +++ b/pkg/sentry/limits/context.go @@ -15,7 +15,7 @@ package limits import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) // contextID is the limit package's type for context.Context.Value keys. diff --git a/pkg/sentry/limits/linux.go b/pkg/sentry/limits/linux.go index a2b401e3d..3f71abecc 100644 --- a/pkg/sentry/limits/linux.go +++ b/pkg/sentry/limits/linux.go @@ -17,7 +17,7 @@ package limits import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) // FromLinuxResource maps linux resources to sentry LimitTypes. diff --git a/pkg/sentry/loader/BUILD b/pkg/sentry/loader/BUILD index 66300f25a..3b322f5f3 100644 --- a/pkg/sentry/loader/BUILD +++ b/pkg/sentry/loader/BUILD @@ -21,7 +21,7 @@ go_library( "vdso_state.go", ":vdso_bin", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/loader", + importpath = "gvisor.dev/gvisor/pkg/sentry/loader", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi", diff --git a/pkg/sentry/loader/elf.go b/pkg/sentry/loader/elf.go index 900236531..fba2f27fe 100644 --- a/pkg/sentry/loader/elf.go +++ b/pkg/sentry/loader/elf.go @@ -20,19 +20,19 @@ import ( "fmt" "io" - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/cpuid" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) const ( diff --git a/pkg/sentry/loader/interpreter.go b/pkg/sentry/loader/interpreter.go index b88062ae5..ccf909cac 100644 --- a/pkg/sentry/loader/interpreter.go +++ b/pkg/sentry/loader/interpreter.go @@ -18,10 +18,10 @@ import ( "bytes" "io" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) const ( diff --git a/pkg/sentry/loader/loader.go b/pkg/sentry/loader/loader.go index dc1a52398..baa12d9a0 100644 --- a/pkg/sentry/loader/loader.go +++ b/pkg/sentry/loader/loader.go @@ -21,18 +21,18 @@ import ( "io" "path" - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/cpuid" - "gvisor.googlesource.com/gvisor/pkg/rand" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/rand" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/syserror" ) // readFull behaves like io.ReadFull for an *fs.File. @@ -54,7 +54,7 @@ func readFull(ctx context.Context, f *fs.File, dst usermem.IOSequence, offset in // openPath opens name for loading. // // openPath returns the fs.Dirent and an *fs.File for name, which is not -// installed in the Task FDMap. The caller takes ownership of both. +// installed in the Task FDTable. The caller takes ownership of both. // // name must be a readable, executable, regular file. func openPath(ctx context.Context, mm *fs.MountNamespace, root, wd *fs.Dirent, maxTraversals *uint, name string) (*fs.Dirent, *fs.File, error) { diff --git a/pkg/sentry/loader/vdso.go b/pkg/sentry/loader/vdso.go index 4e73527cf..ada28aea3 100644 --- a/pkg/sentry/loader/vdso.go +++ b/pkg/sentry/loader/vdso.go @@ -19,22 +19,22 @@ import ( "fmt" "io" - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/anon" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/uniqueid" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/anon" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/uniqueid" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) type fileContext struct { @@ -69,11 +69,12 @@ type byteReader struct { var _ fs.FileOperations = (*byteReader)(nil) // newByteReaderFile creates a fake file to read data from. -func newByteReaderFile(data []byte) *fs.File { +func newByteReaderFile(ctx context.Context, data []byte) *fs.File { // Create a fake inode. inode := fs.NewInode( + ctx, &fsutil.SimpleFileInode{}, - fs.NewPseudoMountSource(), + fs.NewPseudoMountSource(ctx), fs.StableAttr{ Type: fs.Anonymous, DeviceID: anon.PseudoDevice.DeviceID(), @@ -219,8 +220,8 @@ type VDSO struct { // PrepareVDSO validates the system VDSO and returns a VDSO, containing the // param page for updating by the kernel. -func PrepareVDSO(mfp pgalloc.MemoryFileProvider) (*VDSO, error) { - vdsoFile := newByteReaderFile(vdsoBin) +func PrepareVDSO(ctx context.Context, mfp pgalloc.MemoryFileProvider) (*VDSO, error) { + vdsoFile := newByteReaderFile(ctx, vdsoBin) // First make sure the VDSO is valid. vdsoFile does not use ctx, so a // nil context can be passed. diff --git a/pkg/sentry/memmap/BUILD b/pkg/sentry/memmap/BUILD index 9c2cbd18b..29c14ec56 100644 --- a/pkg/sentry/memmap/BUILD +++ b/pkg/sentry/memmap/BUILD @@ -36,7 +36,7 @@ go_library( "mapping_set_impl.go", "memmap.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/memmap", + importpath = "gvisor.dev/gvisor/pkg/sentry/memmap", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/log", diff --git a/pkg/sentry/memmap/mapping_set.go b/pkg/sentry/memmap/mapping_set.go index 3cf2b338f..0a5b7ce45 100644 --- a/pkg/sentry/memmap/mapping_set.go +++ b/pkg/sentry/memmap/mapping_set.go @@ -18,7 +18,7 @@ import ( "fmt" "math" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // MappingSet maps offsets into a Mappable to mappings of those offsets. It is @@ -85,7 +85,7 @@ func (mappingSetFunctions) Merge(r1 MappableRange, val1 MappingsOfRange, r2 Mapp // Each MappingOfRange in val1 must have a matching region in val2, forming // one contiguous region. for k1 := range val1 { - // We expect val2 to to contain a key that forms a contiguous + // We expect val2 to contain a key that forms a contiguous // region with k1. k2 := MappingOfRange{ MappingSpace: k1.MappingSpace, diff --git a/pkg/sentry/memmap/mapping_set_test.go b/pkg/sentry/memmap/mapping_set_test.go index c702555ce..f9b11a59c 100644 --- a/pkg/sentry/memmap/mapping_set_test.go +++ b/pkg/sentry/memmap/mapping_set_test.go @@ -18,7 +18,7 @@ import ( "reflect" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) type testMappingSpace struct { diff --git a/pkg/sentry/memmap/memmap.go b/pkg/sentry/memmap/memmap.go index 0106c857d..03b99aaea 100644 --- a/pkg/sentry/memmap/memmap.go +++ b/pkg/sentry/memmap/memmap.go @@ -18,10 +18,10 @@ package memmap import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // Mappable represents a memory-mappable object, a mutable mapping from uint64 diff --git a/pkg/sentry/mm/BUILD b/pkg/sentry/mm/BUILD index c78cb4280..072745a08 100644 --- a/pkg/sentry/mm/BUILD +++ b/pkg/sentry/mm/BUILD @@ -7,7 +7,7 @@ go_template_instance( name = "file_refcount_set", out = "file_refcount_set.go", imports = { - "platform": "gvisor.googlesource.com/gvisor/pkg/sentry/platform", + "platform": "gvisor.dev/gvisor/pkg/sentry/platform", }, package = "mm", prefix = "fileRefcount", @@ -27,7 +27,7 @@ go_template_instance( "minDegree": "8", }, imports = { - "usermem": "gvisor.googlesource.com/gvisor/pkg/sentry/usermem", + "usermem": "gvisor.dev/gvisor/pkg/sentry/usermem", }, package = "mm", prefix = "vma", @@ -47,7 +47,7 @@ go_template_instance( "minDegree": "8", }, imports = { - "usermem": "gvisor.googlesource.com/gvisor/pkg/sentry/usermem", + "usermem": "gvisor.dev/gvisor/pkg/sentry/usermem", }, package = "mm", prefix = "pma", @@ -95,7 +95,7 @@ go_library( "vma.go", "vma_set.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/mm", + importpath = "gvisor.dev/gvisor/pkg/sentry/mm", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/mm/README.md b/pkg/sentry/mm/README.md index e6efbf565..e1322e373 100644 --- a/pkg/sentry/mm/README.md +++ b/pkg/sentry/mm/README.md @@ -274,7 +274,7 @@ In the sentry: methods [`platform.AddressSpace.MapFile` and `platform.AddressSpace.Unmap`][platform]. -[memmap]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/memmap/memmap.go -[mm]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/mm/mm.go -[pgalloc]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/pgalloc/pgalloc.go -[platform]: https://gvisor.googlesource.com/gvisor/+/master/pkg/sentry/platform/platform.go +[memmap]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/memmap/memmap.go +[mm]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/mm/mm.go +[pgalloc]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/pgalloc/pgalloc.go +[platform]: https://github.com/google/gvisor/blob/master/+/master/pkg/sentry/platform/platform.go diff --git a/pkg/sentry/mm/address_space.go b/pkg/sentry/mm/address_space.go index 06f587fde..cfebcfd42 100644 --- a/pkg/sentry/mm/address_space.go +++ b/pkg/sentry/mm/address_space.go @@ -18,9 +18,9 @@ import ( "fmt" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/atomicbitops" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/atomicbitops" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // AddressSpace returns the platform.AddressSpace bound to mm. diff --git a/pkg/sentry/mm/aio_context.go b/pkg/sentry/mm/aio_context.go index 5c61acf36..1b746d030 100644 --- a/pkg/sentry/mm/aio_context.go +++ b/pkg/sentry/mm/aio_context.go @@ -17,15 +17,15 @@ package mm import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // aioManager creates and manages asynchronous I/O contexts. @@ -213,7 +213,9 @@ func newAIOMappable(mfp pgalloc.MemoryFileProvider) (*aioMappable, error) { if err != nil { return nil, err } - return &aioMappable{mfp: mfp, fr: fr}, nil + m := aioMappable{mfp: mfp, fr: fr} + m.EnableLeakCheck("mm.aioMappable") + return &m, nil } // DecRef implements refs.RefCounter.DecRef. diff --git a/pkg/sentry/mm/debug.go b/pkg/sentry/mm/debug.go index fe58cfc4c..df9adf708 100644 --- a/pkg/sentry/mm/debug.go +++ b/pkg/sentry/mm/debug.go @@ -18,7 +18,7 @@ import ( "bytes" "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) const ( diff --git a/pkg/sentry/mm/io.go b/pkg/sentry/mm/io.go index e4c057d28..b03e7d020 100644 --- a/pkg/sentry/mm/io.go +++ b/pkg/sentry/mm/io.go @@ -15,11 +15,11 @@ package mm import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // There are two supported ways to copy data to/from application virtual diff --git a/pkg/sentry/mm/lifecycle.go b/pkg/sentry/mm/lifecycle.go index 7646d5ab2..4e9ca1de6 100644 --- a/pkg/sentry/mm/lifecycle.go +++ b/pkg/sentry/mm/lifecycle.go @@ -18,14 +18,14 @@ import ( "fmt" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/atomicbitops" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/atomicbitops" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // NewMemoryManager returns a new MemoryManager with no mappings and 1 user. @@ -86,10 +86,22 @@ func (mm *MemoryManager) Fork(ctx context.Context) (*MemoryManager, error) { } // Copy vmas. + dontforks := false dstvgap := mm2.vmas.FirstGap() for srcvseg := mm.vmas.FirstSegment(); srcvseg.Ok(); srcvseg = srcvseg.NextSegment() { vma := srcvseg.Value() // makes a copy of the vma vmaAR := srcvseg.Range() + + if vma.dontfork { + length := uint64(vmaAR.Length()) + mm2.usageAS -= length + if vma.isPrivateDataLocked() { + mm2.dataAS -= length + } + dontforks = true + continue + } + // Inform the Mappable, if any, of the new mapping. if vma.mappable != nil { if err := vma.mappable.AddMapping(ctx, mm2, vmaAR, vma.off, vma.canWriteMappableLocked()); err != nil { @@ -118,6 +130,10 @@ func (mm *MemoryManager) Fork(ctx context.Context) (*MemoryManager, error) { defer mm2.activeMu.Unlock() mm.activeMu.Lock() defer mm.activeMu.Unlock() + if dontforks { + defer mm.pmas.MergeRange(mm.applicationAddrRange()) + } + srcvseg := mm.vmas.FirstSegment() dstpgap := mm2.pmas.FirstGap() var unmapAR usermem.AddrRange for srcpseg := mm.pmas.FirstSegment(); srcpseg.Ok(); srcpseg = srcpseg.NextSegment() { @@ -125,6 +141,27 @@ func (mm *MemoryManager) Fork(ctx context.Context) (*MemoryManager, error) { if !pma.private { continue } + + if dontforks { + // Find the 'vma' that contains the starting address + // associated with the 'pma' (there must be one). + srcvseg = srcvseg.seekNextLowerBound(srcpseg.Start()) + if checkInvariants { + if !srcvseg.Ok() { + panic(fmt.Sprintf("no vma covers pma range %v", srcpseg.Range())) + } + if srcpseg.Start() < srcvseg.Start() { + panic(fmt.Sprintf("vma %v ran ahead of pma %v", srcvseg.Range(), srcpseg.Range())) + } + } + + srcpseg = mm.pmas.Isolate(srcpseg, srcvseg.Range()) + if srcvseg.ValuePtr().dontfork { + continue + } + pma = srcpseg.ValuePtr() + } + if !pma.needCOW { pma.needCOW = true if pma.effectivePerms.Write { diff --git a/pkg/sentry/mm/metadata.go b/pkg/sentry/mm/metadata.go index c218006ee..d2a01d48a 100644 --- a/pkg/sentry/mm/metadata.go +++ b/pkg/sentry/mm/metadata.go @@ -15,9 +15,9 @@ package mm import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // Dumpability describes if and how core dumps should be created. diff --git a/pkg/sentry/mm/mm.go b/pkg/sentry/mm/mm.go index 604866d04..f350e0109 100644 --- a/pkg/sentry/mm/mm.go +++ b/pkg/sentry/mm/mm.go @@ -37,14 +37,14 @@ package mm import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/third_party/gvsync" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/third_party/gvsync" ) // MemoryManager implements a virtual address space. @@ -74,7 +74,7 @@ type MemoryManager struct { // privateRefs is immutable. privateRefs *privateRefs - // users is the number of dependences on the mappings in the MemoryManager. + // users is the number of dependencies on the mappings in the MemoryManager. // When the number of references in users reaches zero, all mappings are // unmapped. // @@ -274,6 +274,9 @@ type vma struct { // metag, none of which we currently support. growsDown bool `state:"manual"` + // dontfork is the MADV_DONTFORK setting for this vma configured by madvise(). + dontfork bool + mlockMode memmap.MLockMode // numaPolicy is the NUMA policy for this vma set by mbind(). diff --git a/pkg/sentry/mm/mm_test.go b/pkg/sentry/mm/mm_test.go index 7209c73ce..4d2bfaaed 100644 --- a/pkg/sentry/mm/mm_test.go +++ b/pkg/sentry/mm/mm_test.go @@ -17,15 +17,15 @@ package mm import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context/contexttest" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) func testMemoryManager(ctx context.Context) *MemoryManager { diff --git a/pkg/sentry/mm/pma.go b/pkg/sentry/mm/pma.go index ece561ff0..c976c6f45 100644 --- a/pkg/sentry/mm/pma.go +++ b/pkg/sentry/mm/pma.go @@ -17,14 +17,14 @@ package mm import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/safecopy" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/platform/safecopy" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // existingPMAsLocked checks that pmas exist for all addresses in ar, and diff --git a/pkg/sentry/mm/procfs.go b/pkg/sentry/mm/procfs.go index c8302a553..a8819aa84 100644 --- a/pkg/sentry/mm/procfs.go +++ b/pkg/sentry/mm/procfs.go @@ -19,10 +19,10 @@ import ( "fmt" "strings" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/proc/seqfile" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) const ( diff --git a/pkg/sentry/mm/save_restore.go b/pkg/sentry/mm/save_restore.go index 0385957bd..93259c5a3 100644 --- a/pkg/sentry/mm/save_restore.go +++ b/pkg/sentry/mm/save_restore.go @@ -17,7 +17,7 @@ package mm import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) // InvalidateUnsavable invokes memmap.Mappable.InvalidateUnsavable on all diff --git a/pkg/sentry/mm/shm.go b/pkg/sentry/mm/shm.go index 12913007b..b9f2d23e5 100644 --- a/pkg/sentry/mm/shm.go +++ b/pkg/sentry/mm/shm.go @@ -15,10 +15,10 @@ package mm import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/kernel/shm" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // DetachShm unmaps a sysv shared memory segment. diff --git a/pkg/sentry/mm/special_mappable.go b/pkg/sentry/mm/special_mappable.go index 687959005..ea2d7af74 100644 --- a/pkg/sentry/mm/special_mappable.go +++ b/pkg/sentry/mm/special_mappable.go @@ -15,14 +15,14 @@ package mm import ( - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // SpecialMappable implements memmap.MappingIdentity and memmap.Mappable with @@ -45,7 +45,9 @@ type SpecialMappable struct { // // Preconditions: fr.Length() != 0. func NewSpecialMappable(name string, mfp pgalloc.MemoryFileProvider, fr platform.FileRange) *SpecialMappable { - return &SpecialMappable{mfp: mfp, fr: fr, name: name} + m := SpecialMappable{mfp: mfp, fr: fr, name: name} + m.EnableLeakCheck("mm.SpecialMappable") + return &m } // DecRef implements refs.RefCounter.DecRef. diff --git a/pkg/sentry/mm/syscalls.go b/pkg/sentry/mm/syscalls.go index 9cf136532..c2466c988 100644 --- a/pkg/sentry/mm/syscalls.go +++ b/pkg/sentry/mm/syscalls.go @@ -18,15 +18,15 @@ import ( "fmt" mrand "math/rand" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/futex" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/kernel/futex" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/pgalloc" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // HandleUserFault handles an application page fault. sp is the faulting @@ -1026,6 +1026,32 @@ func (mm *MemoryManager) SetNumaPolicy(addr usermem.Addr, length uint64, policy } } +// SetDontFork implements the semantics of madvise MADV_DONTFORK. +func (mm *MemoryManager) SetDontFork(addr usermem.Addr, length uint64, dontfork bool) error { + ar, ok := addr.ToRange(length) + if !ok { + return syserror.EINVAL + } + + mm.mappingMu.Lock() + defer mm.mappingMu.Unlock() + defer func() { + mm.vmas.MergeRange(ar) + mm.vmas.MergeAdjacent(ar) + }() + + for vseg := mm.vmas.LowerBoundSegment(ar.Start); vseg.Ok() && vseg.Start() < ar.End; vseg = vseg.NextSegment() { + vseg = mm.vmas.Isolate(vseg, ar) + vma := vseg.ValuePtr() + vma.dontfork = dontfork + } + + if mm.vmas.SpanRange(ar) != ar.Length() { + return syserror.ENOMEM + } + return nil +} + // Decommit implements the semantics of Linux's madvise(MADV_DONTNEED). func (mm *MemoryManager) Decommit(addr usermem.Addr, length uint64) error { ar, ok := addr.ToRange(length) diff --git a/pkg/sentry/mm/vma.go b/pkg/sentry/mm/vma.go index 0af8de5b0..f2fd70799 100644 --- a/pkg/sentry/mm/vma.go +++ b/pkg/sentry/mm/vma.go @@ -17,14 +17,14 @@ package mm import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // Preconditions: mm.mappingMu must be locked for writing. opts must be valid @@ -34,7 +34,7 @@ func (mm *MemoryManager) createVMALocked(ctx context.Context, opts memmap.MMapOp panic(fmt.Sprintf("Non-effective MaxPerms %s cannot be enforced", opts.MaxPerms)) } - // Find a useable range. + // Find a usable range. addr, err := mm.findAvailableLocked(opts.Length, findAvailableOpts{ Addr: opts.Addr, Fixed: opts.Fixed, @@ -439,6 +439,7 @@ func (vmaSetFunctions) Merge(ar1 usermem.AddrRange, vma1 vma, ar2 usermem.AddrRa vma1.mlockMode != vma2.mlockMode || vma1.numaPolicy != vma2.numaPolicy || vma1.numaNodemask != vma2.numaNodemask || + vma1.dontfork != vma2.dontfork || vma1.id != vma2.id || vma1.hint != vma2.hint { return vma{}, false diff --git a/pkg/sentry/pgalloc/BUILD b/pkg/sentry/pgalloc/BUILD index ca2d5ba6f..858f895f2 100644 --- a/pkg/sentry/pgalloc/BUILD +++ b/pkg/sentry/pgalloc/BUILD @@ -35,7 +35,7 @@ go_template_instance( "minDegree": "10", }, imports = { - "platform": "gvisor.googlesource.com/gvisor/pkg/sentry/platform", + "platform": "gvisor.dev/gvisor/pkg/sentry/platform", }, package = "pgalloc", prefix = "usage", @@ -59,7 +59,7 @@ go_library( "save_restore.go", "usage_set.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc", + importpath = "gvisor.dev/gvisor/pkg/sentry/pgalloc", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/log", diff --git a/pkg/sentry/pgalloc/context.go b/pkg/sentry/pgalloc/context.go index cb9809b1f..11ccf897b 100644 --- a/pkg/sentry/pgalloc/context.go +++ b/pkg/sentry/pgalloc/context.go @@ -15,7 +15,7 @@ package pgalloc import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) // contextID is this package's type for context.Context.Value keys. diff --git a/pkg/sentry/pgalloc/pgalloc.go b/pkg/sentry/pgalloc/pgalloc.go index 6d91f1a7b..8bd3e885d 100644 --- a/pkg/sentry/pgalloc/pgalloc.go +++ b/pkg/sentry/pgalloc/pgalloc.go @@ -30,14 +30,14 @@ import ( "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/hostmm" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/hostmm" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // MemoryFile is a platform.File whose pages may be allocated to arbitrary diff --git a/pkg/sentry/pgalloc/pgalloc_test.go b/pkg/sentry/pgalloc/pgalloc_test.go index 14a39bb9e..428e6a859 100644 --- a/pkg/sentry/pgalloc/pgalloc_test.go +++ b/pkg/sentry/pgalloc/pgalloc_test.go @@ -17,7 +17,7 @@ package pgalloc import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) const ( diff --git a/pkg/sentry/pgalloc/save_restore.go b/pkg/sentry/pgalloc/save_restore.go index d4ba384b1..1effc7735 100644 --- a/pkg/sentry/pgalloc/save_restore.go +++ b/pkg/sentry/pgalloc/save_restore.go @@ -22,10 +22,10 @@ import ( "sync/atomic" "syscall" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/state" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/state" ) // SaveTo writes f's state to the given stream. diff --git a/pkg/sentry/platform/BUILD b/pkg/sentry/platform/BUILD index ac8a6cb7f..9aa6ec507 100644 --- a/pkg/sentry/platform/BUILD +++ b/pkg/sentry/platform/BUILD @@ -22,12 +22,13 @@ go_library( "mmap_min_addr.go", "platform.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/platform", + importpath = "gvisor.dev/gvisor/pkg/sentry/platform", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", "//pkg/atomicbitops", "//pkg/log", + "//pkg/seccomp", "//pkg/sentry/arch", "//pkg/sentry/context", "//pkg/sentry/platform/safecopy", diff --git a/pkg/sentry/platform/context.go b/pkg/sentry/platform/context.go index 793f57fd7..e29bc4485 100644 --- a/pkg/sentry/platform/context.go +++ b/pkg/sentry/platform/context.go @@ -15,7 +15,7 @@ package platform import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/context" ) // contextID is the auth package's type for context.Context.Value keys. diff --git a/pkg/sentry/platform/interrupt/BUILD b/pkg/sentry/platform/interrupt/BUILD index eeccd4d0e..eeb634644 100644 --- a/pkg/sentry/platform/interrupt/BUILD +++ b/pkg/sentry/platform/interrupt/BUILD @@ -7,7 +7,7 @@ go_library( srcs = [ "interrupt.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/platform/interrupt", + importpath = "gvisor.dev/gvisor/pkg/sentry/platform/interrupt", visibility = ["//pkg/sentry:internal"], ) diff --git a/pkg/sentry/platform/kvm/BUILD b/pkg/sentry/platform/kvm/BUILD index 2931d6ddc..ad8b95744 100644 --- a/pkg/sentry/platform/kvm/BUILD +++ b/pkg/sentry/platform/kvm/BUILD @@ -14,6 +14,7 @@ go_library( "bluepill_fault.go", "bluepill_unsafe.go", "context.go", + "filters.go", "kvm.go", "kvm_amd64.go", "kvm_amd64_unsafe.go", @@ -25,7 +26,7 @@ go_library( "physical_map.go", "virtual_map.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/platform/kvm", + importpath = "gvisor.dev/gvisor/pkg/sentry/platform/kvm", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", @@ -33,6 +34,7 @@ go_library( "//pkg/cpuid", "//pkg/log", "//pkg/procid", + "//pkg/seccomp", "//pkg/sentry/arch", "//pkg/sentry/platform", "//pkg/sentry/platform/interrupt", diff --git a/pkg/sentry/platform/kvm/address_space.go b/pkg/sentry/platform/kvm/address_space.go index 689122175..acd41f73d 100644 --- a/pkg/sentry/platform/kvm/address_space.go +++ b/pkg/sentry/platform/kvm/address_space.go @@ -18,10 +18,10 @@ import ( "sync" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/atomicbitops" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0/pagetables" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/atomicbitops" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // dirtySet tracks vCPUs for invalidation. diff --git a/pkg/sentry/platform/kvm/allocator.go b/pkg/sentry/platform/kvm/allocator.go index 42bcc9733..80942e9c9 100644 --- a/pkg/sentry/platform/kvm/allocator.go +++ b/pkg/sentry/platform/kvm/allocator.go @@ -17,7 +17,7 @@ package kvm import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0/pagetables" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables" ) type allocator struct { diff --git a/pkg/sentry/platform/kvm/bluepill.go b/pkg/sentry/platform/kvm/bluepill.go index a926e6f8b..043de51b3 100644 --- a/pkg/sentry/platform/kvm/bluepill.go +++ b/pkg/sentry/platform/kvm/bluepill.go @@ -19,8 +19,8 @@ import ( "reflect" "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/safecopy" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/platform/safecopy" ) // bluepill enters guest mode. diff --git a/pkg/sentry/platform/kvm/bluepill_amd64.go b/pkg/sentry/platform/kvm/bluepill_amd64.go index c258408f9..421c88220 100644 --- a/pkg/sentry/platform/kvm/bluepill_amd64.go +++ b/pkg/sentry/platform/kvm/bluepill_amd64.go @@ -19,8 +19,8 @@ package kvm import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0" ) var ( diff --git a/pkg/sentry/platform/kvm/bluepill_amd64_unsafe.go b/pkg/sentry/platform/kvm/bluepill_amd64_unsafe.go index 92fde7ee0..9d8af143e 100644 --- a/pkg/sentry/platform/kvm/bluepill_amd64_unsafe.go +++ b/pkg/sentry/platform/kvm/bluepill_amd64_unsafe.go @@ -19,8 +19,8 @@ package kvm import ( "unsafe" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0" ) // bluepillArchContext returns the arch-specific context. @@ -30,7 +30,7 @@ func bluepillArchContext(context unsafe.Pointer) *arch.SignalContext64 { return &((*arch.UContext64)(context).MContext) } -// dieArchSetup initialies the state for dieTrampoline. +// dieArchSetup initializes the state for dieTrampoline. // // The amd64 dieTrampoline requires the vCPU to be set in BX, and the last RIP // to be in AX. The trampoline then simulates a call to dieHandler from the diff --git a/pkg/sentry/platform/kvm/bluepill_fault.go b/pkg/sentry/platform/kvm/bluepill_fault.go index 3c452f5ba..b97476053 100644 --- a/pkg/sentry/platform/kvm/bluepill_fault.go +++ b/pkg/sentry/platform/kvm/bluepill_fault.go @@ -18,7 +18,7 @@ import ( "sync/atomic" "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) const ( diff --git a/pkg/sentry/platform/kvm/context.go b/pkg/sentry/platform/kvm/context.go index 0eb0020f7..99450d22d 100644 --- a/pkg/sentry/platform/kvm/context.go +++ b/pkg/sentry/platform/kvm/context.go @@ -15,11 +15,11 @@ package kvm import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/interrupt" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/platform/interrupt" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // context is an implementation of the platform context. diff --git a/pkg/sentry/platform/kvm/filters.go b/pkg/sentry/platform/kvm/filters.go new file mode 100644 index 000000000..7d949f1dd --- /dev/null +++ b/pkg/sentry/platform/kvm/filters.go @@ -0,0 +1,33 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package kvm + +import ( + "syscall" + + "gvisor.dev/gvisor/pkg/seccomp" +) + +// SyscallFilters returns syscalls made exclusively by the KVM platform. +func (*KVM) SyscallFilters() seccomp.SyscallRules { + return seccomp.SyscallRules{ + syscall.SYS_ARCH_PRCTL: {}, + syscall.SYS_IOCTL: {}, + syscall.SYS_MMAP: {}, + syscall.SYS_RT_SIGSUSPEND: {}, + syscall.SYS_RT_SIGTIMEDWAIT: {}, + 0xffffffffffffffff: {}, // KVM uses syscall -1 to transition to host. + } +} diff --git a/pkg/sentry/platform/kvm/kvm.go b/pkg/sentry/platform/kvm/kvm.go index ed0521c3f..ee4cd2f4d 100644 --- a/pkg/sentry/platform/kvm/kvm.go +++ b/pkg/sentry/platform/kvm/kvm.go @@ -21,11 +21,11 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/cpuid" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0/pagetables" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // KVM represents a lightweight VM context. @@ -141,3 +141,17 @@ func (k *KVM) NewContext() platform.Context { machine: k.machine, } } + +type constructor struct{} + +func (*constructor) New(f *os.File) (platform.Platform, error) { + return New(f) +} + +func (*constructor) OpenDevice() (*os.File, error) { + return OpenDevice() +} + +func init() { + platform.Register("kvm", &constructor{}) +} diff --git a/pkg/sentry/platform/kvm/kvm_amd64.go b/pkg/sentry/platform/kvm/kvm_amd64.go index 61493ccaf..5d8ef4761 100644 --- a/pkg/sentry/platform/kvm/kvm_amd64.go +++ b/pkg/sentry/platform/kvm/kvm_amd64.go @@ -17,7 +17,7 @@ package kvm import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0" ) // userMemoryRegion is a region of physical memory. diff --git a/pkg/sentry/platform/kvm/kvm_test.go b/pkg/sentry/platform/kvm/kvm_test.go index e83db71e9..30df725d4 100644 --- a/pkg/sentry/platform/kvm/kvm_test.go +++ b/pkg/sentry/platform/kvm/kvm_test.go @@ -22,12 +22,12 @@ import ( "testing" "time" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/kvm/testutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0/pagetables" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/platform/kvm/testutil" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) var dummyFPState = (*byte)(arch.NewFloatingPointData()) diff --git a/pkg/sentry/platform/kvm/machine.go b/pkg/sentry/platform/kvm/machine.go index f8ccd86af..679087e25 100644 --- a/pkg/sentry/platform/kvm/machine.go +++ b/pkg/sentry/platform/kvm/machine.go @@ -21,12 +21,12 @@ import ( "sync/atomic" "syscall" - "gvisor.googlesource.com/gvisor/pkg/atomicbitops" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/procid" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0/pagetables" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/atomicbitops" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/procid" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // machine contains state associated with the VM as a whole. @@ -135,7 +135,7 @@ type dieState struct { // newVCPU creates a returns a new vCPU. // -// Precondtion: mu must be held. +// Precondition: mu must be held. func (m *machine) newVCPU() *vCPU { id := len(m.vCPUs) @@ -426,7 +426,12 @@ func (c *vCPU) unlock() { // Normal state. case vCPUUser | vCPUGuest | vCPUWaiter: // Force a transition: this must trigger a notification when we - // return from guest mode. + // return from guest mode. We must clear vCPUWaiter here + // anyways, because BounceToKernel will force a transition only + // from ring3 to ring0, which will not clear this bit. Halt may + // workaround the issue, but if there is no exception or + // syscall in this period, BounceToKernel will hang. + atomicbitops.AndUint32(&c.state, ^vCPUWaiter) c.notify() case vCPUUser | vCPUWaiter: // Waiting for the lock to be released; the responsibility is diff --git a/pkg/sentry/platform/kvm/machine_amd64.go b/pkg/sentry/platform/kvm/machine_amd64.go index b6821122a..c1cbe33be 100644 --- a/pkg/sentry/platform/kvm/machine_amd64.go +++ b/pkg/sentry/platform/kvm/machine_amd64.go @@ -22,11 +22,11 @@ import ( "runtime/debug" "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0/pagetables" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // initArchState initializes architecture-specific state. diff --git a/pkg/sentry/platform/kvm/machine_amd64_unsafe.go b/pkg/sentry/platform/kvm/machine_amd64_unsafe.go index 06a2e3b0c..506ec9af1 100644 --- a/pkg/sentry/platform/kvm/machine_amd64_unsafe.go +++ b/pkg/sentry/platform/kvm/machine_amd64_unsafe.go @@ -22,8 +22,8 @@ import ( "syscall" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/time" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/time" ) // setMemoryRegion initializes a region. @@ -87,7 +87,7 @@ func (c *vCPU) setCPUID() error { // setSystemTime sets the TSC for the vCPU. // -// This has to make the call many times in order to minimize the intrinstic +// This has to make the call many times in order to minimize the intrinsic // error in the offset. Unfortunately KVM does not expose a relative offset via // the API, so this is an approximation. We do this via an iterative algorithm. // This has the advantage that it can generally deal with highly variable diff --git a/pkg/sentry/platform/kvm/machine_unsafe.go b/pkg/sentry/platform/kvm/machine_unsafe.go index 1d3c6d2d6..405e00292 100644 --- a/pkg/sentry/platform/kvm/machine_unsafe.go +++ b/pkg/sentry/platform/kvm/machine_unsafe.go @@ -21,11 +21,12 @@ package kvm import ( "fmt" + "math" "sync/atomic" "syscall" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) //go:linkname entersyscall runtime.entersyscall @@ -134,7 +135,7 @@ func (c *vCPU) notify() { syscall.SYS_FUTEX, uintptr(unsafe.Pointer(&c.state)), linux.FUTEX_WAKE|linux.FUTEX_PRIVATE_FLAG, - ^uintptr(0), // Number of waiters. + math.MaxInt32, // Number of waiters. 0, 0, 0) if errno != 0 { throw("futex wake error") diff --git a/pkg/sentry/platform/kvm/physical_map.go b/pkg/sentry/platform/kvm/physical_map.go index 450eb8201..586e91bb2 100644 --- a/pkg/sentry/platform/kvm/physical_map.go +++ b/pkg/sentry/platform/kvm/physical_map.go @@ -19,9 +19,9 @@ import ( "sort" "syscall" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) const ( diff --git a/pkg/sentry/platform/kvm/testutil/BUILD b/pkg/sentry/platform/kvm/testutil/BUILD index e10087e8e..77a449a8b 100644 --- a/pkg/sentry/platform/kvm/testutil/BUILD +++ b/pkg/sentry/platform/kvm/testutil/BUILD @@ -10,6 +10,6 @@ go_library( "testutil_amd64.go", "testutil_amd64.s", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/platform/kvm/testutil", + importpath = "gvisor.dev/gvisor/pkg/sentry/platform/kvm/testutil", visibility = ["//pkg/sentry/platform/kvm:__pkg__"], ) diff --git a/pkg/sentry/platform/kvm/virtual_map.go b/pkg/sentry/platform/kvm/virtual_map.go index 28a1b4414..2d68855ef 100644 --- a/pkg/sentry/platform/kvm/virtual_map.go +++ b/pkg/sentry/platform/kvm/virtual_map.go @@ -22,7 +22,7 @@ import ( "regexp" "strconv" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) type virtualRegion struct { diff --git a/pkg/sentry/platform/kvm/virtual_map_test.go b/pkg/sentry/platform/kvm/virtual_map_test.go index d03ec654a..6a2f145be 100644 --- a/pkg/sentry/platform/kvm/virtual_map_test.go +++ b/pkg/sentry/platform/kvm/virtual_map_test.go @@ -18,7 +18,7 @@ import ( "syscall" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) type checker struct { diff --git a/pkg/sentry/platform/mmap_min_addr.go b/pkg/sentry/platform/mmap_min_addr.go index 90976735b..999787462 100644 --- a/pkg/sentry/platform/mmap_min_addr.go +++ b/pkg/sentry/platform/mmap_min_addr.go @@ -20,7 +20,7 @@ import ( "strconv" "strings" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // systemMMapMinAddrSource is the source file. diff --git a/pkg/sentry/platform/platform.go b/pkg/sentry/platform/platform.go index ae37276ad..ec22dbf87 100644 --- a/pkg/sentry/platform/platform.go +++ b/pkg/sentry/platform/platform.go @@ -19,11 +19,13 @@ package platform import ( "fmt" + "os" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/seccomp" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // Platform provides abstractions for execution contexts (Context, @@ -93,6 +95,9 @@ type Platform interface { // Platforms for which this does not hold may panic if PreemptAllCPUs is // called. PreemptAllCPUs() error + + // SyscallFilters returns syscalls made exclusively by this platform. + SyscallFilters() seccomp.SyscallRules } // NoCPUPreemptionDetection implements Platform.DetectsCPUPreemption and @@ -256,7 +261,7 @@ type AddressSpaceIO interface { LoadUint32(addr usermem.Addr) (uint32, error) } -// NoAddressSpaceIO implements AddressSpaceIO methods by panicing. +// NoAddressSpaceIO implements AddressSpaceIO methods by panicking. type NoAddressSpaceIO struct{} // CopyOut implements AddressSpaceIO.CopyOut. @@ -347,3 +352,26 @@ type File interface { func (fr FileRange) String() string { return fmt.Sprintf("[%#x, %#x)", fr.Start, fr.End) } + +// Constructor represents a platform type. +type Constructor interface { + New(deviceFile *os.File) (Platform, error) + OpenDevice() (*os.File, error) +} + +// platforms contains all available platform types. +var platforms = map[string]Constructor{} + +// Register registers a new platform type. +func Register(name string, platform Constructor) { + platforms[name] = platform +} + +// Lookup looks up the platform constructor by name. +func Lookup(name string) (Constructor, error) { + p, ok := platforms[name] + if !ok { + return nil, fmt.Errorf("unknown platform: %v", name) + } + return p, nil +} diff --git a/pkg/sentry/platform/ptrace/BUILD b/pkg/sentry/platform/ptrace/BUILD index 434d003a3..1b6c54e96 100644 --- a/pkg/sentry/platform/ptrace/BUILD +++ b/pkg/sentry/platform/ptrace/BUILD @@ -5,6 +5,7 @@ package(licenses = ["notice"]) go_library( name = "ptrace", srcs = [ + "filters.go", "ptrace.go", "ptrace_unsafe.go", "stub_amd64.s", @@ -15,7 +16,7 @@ go_library( "subprocess_linux_amd64_unsafe.go", "subprocess_unsafe.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace", + importpath = "gvisor.dev/gvisor/pkg/sentry/platform/ptrace", visibility = ["//:sandbox"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/platform/ptrace/filters.go b/pkg/sentry/platform/ptrace/filters.go new file mode 100644 index 000000000..1e07cfd0d --- /dev/null +++ b/pkg/sentry/platform/ptrace/filters.go @@ -0,0 +1,33 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package ptrace + +import ( + "syscall" + + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/seccomp" +) + +// SyscallFilters returns syscalls made exclusively by the ptrace platform. +func (*PTrace) SyscallFilters() seccomp.SyscallRules { + return seccomp.SyscallRules{ + unix.SYS_GETCPU: {}, + unix.SYS_SCHED_SETAFFINITY: {}, + syscall.SYS_PTRACE: {}, + syscall.SYS_TGKILL: {}, + syscall.SYS_WAIT4: {}, + } +} diff --git a/pkg/sentry/platform/ptrace/ptrace.go b/pkg/sentry/platform/ptrace/ptrace.go index 6a890dd81..6fd30ed25 100644 --- a/pkg/sentry/platform/ptrace/ptrace.go +++ b/pkg/sentry/platform/ptrace/ptrace.go @@ -45,13 +45,14 @@ package ptrace import ( + "os" "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/interrupt" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/platform/interrupt" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) var ( @@ -236,3 +237,17 @@ func (p *PTrace) NewAddressSpace(_ interface{}) (platform.AddressSpace, <-chan s func (*PTrace) NewContext() platform.Context { return &context{} } + +type constructor struct{} + +func (*constructor) New(*os.File) (platform.Platform, error) { + return New() +} + +func (*constructor) OpenDevice() (*os.File, error) { + return nil, nil +} + +func init() { + platform.Register("ptrace", &constructor{}) +} diff --git a/pkg/sentry/platform/ptrace/ptrace_unsafe.go b/pkg/sentry/platform/ptrace/ptrace_unsafe.go index 585f6c1fb..2706039a5 100644 --- a/pkg/sentry/platform/ptrace/ptrace_unsafe.go +++ b/pkg/sentry/platform/ptrace/ptrace_unsafe.go @@ -18,8 +18,8 @@ import ( "syscall" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // GETREGSET/SETREGSET register set types. diff --git a/pkg/sentry/platform/ptrace/stub_unsafe.go b/pkg/sentry/platform/ptrace/stub_unsafe.go index 54d5021a9..aa1b87237 100644 --- a/pkg/sentry/platform/ptrace/stub_unsafe.go +++ b/pkg/sentry/platform/ptrace/stub_unsafe.go @@ -19,8 +19,8 @@ import ( "syscall" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/safecopy" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/platform/safecopy" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // stub is defined in arch-specific assembly. diff --git a/pkg/sentry/platform/ptrace/subprocess.go b/pkg/sentry/platform/ptrace/subprocess.go index d3b196924..15e84735e 100644 --- a/pkg/sentry/platform/ptrace/subprocess.go +++ b/pkg/sentry/platform/ptrace/subprocess.go @@ -21,10 +21,11 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/procid" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/procid" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/platform" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // globalPool exists to solve two distinct problems: @@ -122,7 +123,7 @@ type subprocess struct { contexts map[*context]struct{} } -// newSubprocess returns a useable subprocess. +// newSubprocess returns a usable subprocess. // // This will either be a newly created subprocess, or one from the global pool. // The create function will be called in the latter case, which is guaranteed @@ -154,6 +155,7 @@ func newSubprocess(create func() (*thread, error)) (*subprocess, error) { errChan <- err return } + firstThread.grabInitRegs() // Ready to handle requests. errChan <- nil @@ -178,6 +180,7 @@ func newSubprocess(create func() (*thread, error)) (*subprocess, error) { // Detach the thread. t.detach() + t.initRegs = firstThread.initRegs // Return the thread. r <- t @@ -252,7 +255,7 @@ func (s *subprocess) newThread() *thread { return t } -// attach attachs to the thread. +// attach attaches to the thread. func (t *thread) attach() { if _, _, errno := syscall.RawSyscall(syscall.SYS_PTRACE, syscall.PTRACE_ATTACH, uintptr(t.tid), 0); errno != 0 { panic(fmt.Sprintf("unable to attach: %v", errno)) @@ -268,7 +271,9 @@ func (t *thread) attach() { // Initialize options. t.init() +} +func (t *thread) grabInitRegs() { // Grab registers. // // Note that we adjust the current register RIP value to be just before @@ -280,9 +285,9 @@ func (t *thread) attach() { t.initRegs.Rip -= initRegsRipAdjustment } -// detach detachs from the thread. +// detach detaches from the thread. // -// Because the SIGSTOP is not supressed, the thread will enter group-stop. +// Because the SIGSTOP is not suppressed, the thread will enter group-stop. func (t *thread) detach() { if _, _, errno := syscall.RawSyscall6(syscall.SYS_PTRACE, syscall.PTRACE_DETACH, uintptr(t.tid), 0, uintptr(syscall.SIGSTOP), 0, 0); errno != 0 { panic(fmt.Sprintf("can't detach new clone: %v", errno)) @@ -300,6 +305,18 @@ const ( killed ) +func (t *thread) dumpAndPanic(message string) { + var regs syscall.PtraceRegs + message += "\n" + if err := t.getRegs(®s); err == nil { + message += dumpRegs(®s) + } else { + log.Warningf("unable to get registers: %v", err) + } + message += fmt.Sprintf("stubStart\t = %016x\n", stubStart) + panic(message) +} + // wait waits for a stop event. // // Precondition: outcome is a valid waitOutcome. @@ -320,7 +337,7 @@ func (t *thread) wait(outcome waitOutcome) syscall.Signal { switch outcome { case stopped: if !status.Stopped() { - panic(fmt.Sprintf("ptrace status unexpected: got %v, wanted stopped", status)) + t.dumpAndPanic(fmt.Sprintf("ptrace status unexpected: got %v, wanted stopped", status)) } stopSig := status.StopSignal() if stopSig == 0 { @@ -334,12 +351,12 @@ func (t *thread) wait(outcome waitOutcome) syscall.Signal { return stopSig case killed: if !status.Exited() && !status.Signaled() { - panic(fmt.Sprintf("ptrace status unexpected: got %v, wanted exited", status)) + t.dumpAndPanic(fmt.Sprintf("ptrace status unexpected: got %v, wanted exited", status)) } return syscall.Signal(status.ExitStatus()) default: // Should not happen. - panic(fmt.Sprintf("unknown outcome: %v", outcome)) + t.dumpAndPanic(fmt.Sprintf("unknown outcome: %v", outcome)) } } } @@ -357,13 +374,16 @@ func (t *thread) destroy() { // init initializes trace options. func (t *thread) init() { - // Set our TRACESYSGOOD option to differeniate real SIGTRAP. + // Set the TRACESYSGOOD option to differentiate real SIGTRAP. + // set PTRACE_O_EXITKILL to ensure that the unexpected exit of the + // sentry will immediately kill the associated stubs. + const PTRACE_O_EXITKILL = 0x100000 _, _, errno := syscall.RawSyscall6( syscall.SYS_PTRACE, syscall.PTRACE_SETOPTIONS, uintptr(t.tid), 0, - syscall.PTRACE_O_TRACESYSGOOD, + syscall.PTRACE_O_TRACESYSGOOD|syscall.PTRACE_O_TRACEEXIT|PTRACE_O_EXITKILL, 0, 0) if errno != 0 { panic(fmt.Sprintf("ptrace set options failed: %v", errno)) @@ -406,7 +426,7 @@ func (t *thread) syscall(regs *syscall.PtraceRegs) (uintptr, error) { // between syscall-enter-stop and syscall-exit-stop; it happens *after* // syscall-exit-stop.)" - ptrace(2), "Syscall-stops" if sig := t.wait(stopped); sig != (syscallEvent | syscall.SIGTRAP) { - panic(fmt.Sprintf("wait failed: expected SIGTRAP, got %v [%d]", sig, sig)) + t.dumpAndPanic(fmt.Sprintf("wait failed: expected SIGTRAP, got %v [%d]", sig, sig)) } // Grab registers. @@ -538,7 +558,7 @@ func (s *subprocess) switchToApp(c *context, ac arch.Context) bool { if c.signalInfo.Code > 0 { // The signal was generated by the kernel. We inspect // the signal information, and may patch it in order to - // faciliate vsyscall emulation. See patchSignalInfo. + // facilitate vsyscall emulation. See patchSignalInfo. patchSignalInfo(regs, &c.signalInfo) return false } else if c.signalInfo.Code <= 0 && c.signalInfo.Pid() == int32(os.Getpid()) { diff --git a/pkg/sentry/platform/ptrace/subprocess_amd64.go b/pkg/sentry/platform/ptrace/subprocess_amd64.go index 77a0e908f..a70512913 100644 --- a/pkg/sentry/platform/ptrace/subprocess_amd64.go +++ b/pkg/sentry/platform/ptrace/subprocess_amd64.go @@ -17,9 +17,11 @@ package ptrace import ( + "fmt" + "strings" "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/arch" ) const ( @@ -102,3 +104,38 @@ func syscallReturnValue(regs *syscall.PtraceRegs) (uintptr, error) { } return uintptr(rval), nil } + +func dumpRegs(regs *syscall.PtraceRegs) string { + var m strings.Builder + + fmt.Fprintf(&m, "Registers:\n") + fmt.Fprintf(&m, "\tR15\t = %016x\n", regs.R15) + fmt.Fprintf(&m, "\tR14\t = %016x\n", regs.R14) + fmt.Fprintf(&m, "\tR13\t = %016x\n", regs.R13) + fmt.Fprintf(&m, "\tR12\t = %016x\n", regs.R12) + fmt.Fprintf(&m, "\tRbp\t = %016x\n", regs.Rbp) + fmt.Fprintf(&m, "\tRbx\t = %016x\n", regs.Rbx) + fmt.Fprintf(&m, "\tR11\t = %016x\n", regs.R11) + fmt.Fprintf(&m, "\tR10\t = %016x\n", regs.R10) + fmt.Fprintf(&m, "\tR9\t = %016x\n", regs.R9) + fmt.Fprintf(&m, "\tR8\t = %016x\n", regs.R8) + fmt.Fprintf(&m, "\tRax\t = %016x\n", regs.Rax) + fmt.Fprintf(&m, "\tRcx\t = %016x\n", regs.Rcx) + fmt.Fprintf(&m, "\tRdx\t = %016x\n", regs.Rdx) + fmt.Fprintf(&m, "\tRsi\t = %016x\n", regs.Rsi) + fmt.Fprintf(&m, "\tRdi\t = %016x\n", regs.Rdi) + fmt.Fprintf(&m, "\tOrig_rax = %016x\n", regs.Orig_rax) + fmt.Fprintf(&m, "\tRip\t = %016x\n", regs.Rip) + fmt.Fprintf(&m, "\tCs\t = %016x\n", regs.Cs) + fmt.Fprintf(&m, "\tEflags\t = %016x\n", regs.Eflags) + fmt.Fprintf(&m, "\tRsp\t = %016x\n", regs.Rsp) + fmt.Fprintf(&m, "\tSs\t = %016x\n", regs.Ss) + fmt.Fprintf(&m, "\tFs_base\t = %016x\n", regs.Fs_base) + fmt.Fprintf(&m, "\tGs_base\t = %016x\n", regs.Gs_base) + fmt.Fprintf(&m, "\tDs\t = %016x\n", regs.Ds) + fmt.Fprintf(&m, "\tEs\t = %016x\n", regs.Es) + fmt.Fprintf(&m, "\tFs\t = %016x\n", regs.Fs) + fmt.Fprintf(&m, "\tGs\t = %016x\n", regs.Gs) + + return m.String() +} diff --git a/pkg/sentry/platform/ptrace/subprocess_linux.go b/pkg/sentry/platform/ptrace/subprocess_linux.go index 914be7486..87ded0bbd 100644 --- a/pkg/sentry/platform/ptrace/subprocess_linux.go +++ b/pkg/sentry/platform/ptrace/subprocess_linux.go @@ -20,11 +20,11 @@ import ( "fmt" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/procid" - "gvisor.googlesource.com/gvisor/pkg/seccomp" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/procid" + "gvisor.dev/gvisor/pkg/seccomp" + "gvisor.dev/gvisor/pkg/sentry/arch" ) const syscallEvent syscall.Signal = 0x80 @@ -235,6 +235,7 @@ func attachedThread(flags uintptr, defaultAction linux.BPFAction) (*thread, erro return nil, fmt.Errorf("wait failed: expected SIGSTOP, got %v", sig) } t.attach() + t.grabInitRegs() return t, nil } @@ -305,7 +306,7 @@ func (s *subprocess) createStub() (*thread, error) { arch.SyscallArgument{Value: 0}, arch.SyscallArgument{Value: 0}) if err != nil { - return nil, err + return nil, fmt.Errorf("creating stub process: %v", err) } // Wait for child to enter group-stop, so we don't stop its @@ -324,7 +325,7 @@ func (s *subprocess) createStub() (*thread, error) { arch.SyscallArgument{Value: 0}, arch.SyscallArgument{Value: 0}) if err != nil { - return nil, err + return nil, fmt.Errorf("waiting on stub process: %v", err) } childT := &thread{ diff --git a/pkg/sentry/platform/ptrace/subprocess_linux_amd64_unsafe.go b/pkg/sentry/platform/ptrace/subprocess_linux_amd64_unsafe.go index 1bf7eab28..e977992f9 100644 --- a/pkg/sentry/platform/ptrace/subprocess_linux_amd64_unsafe.go +++ b/pkg/sentry/platform/ptrace/subprocess_linux_amd64_unsafe.go @@ -23,7 +23,7 @@ import ( "unsafe" "golang.org/x/sys/unix" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) // maskPool contains reusable CPU masks for setting affinity. Unfortunately, diff --git a/pkg/sentry/platform/ring0/BUILD b/pkg/sentry/platform/ring0/BUILD index ecb3e9a9c..8ed6c7652 100644 --- a/pkg/sentry/platform/ring0/BUILD +++ b/pkg/sentry/platform/ring0/BUILD @@ -43,7 +43,7 @@ go_library( "lib_amd64.s", "ring0.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0", + importpath = "gvisor.dev/gvisor/pkg/sentry/platform/ring0", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/cpuid", diff --git a/pkg/sentry/platform/ring0/defs.go b/pkg/sentry/platform/ring0/defs.go index 5bbd4612d..076063f85 100644 --- a/pkg/sentry/platform/ring0/defs.go +++ b/pkg/sentry/platform/ring0/defs.go @@ -17,7 +17,7 @@ package ring0 import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) var ( diff --git a/pkg/sentry/platform/ring0/defs_amd64.go b/pkg/sentry/platform/ring0/defs_amd64.go index 413c3dbc4..7206322b1 100644 --- a/pkg/sentry/platform/ring0/defs_amd64.go +++ b/pkg/sentry/platform/ring0/defs_amd64.go @@ -17,7 +17,7 @@ package ring0 import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0/pagetables" + "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables" ) // Segment indices and Selectors. diff --git a/pkg/sentry/platform/ring0/entry_amd64.s b/pkg/sentry/platform/ring0/entry_amd64.s index 8cb8c4996..02df38331 100644 --- a/pkg/sentry/platform/ring0/entry_amd64.s +++ b/pkg/sentry/platform/ring0/entry_amd64.s @@ -15,7 +15,7 @@ #include "funcdata.h" #include "textflag.h" -// NB: Offsets are programatically generated (see BUILD). +// NB: Offsets are programmatically generated (see BUILD). // // This file is concatenated with the definitions. diff --git a/pkg/sentry/platform/ring0/kernel_amd64.go b/pkg/sentry/platform/ring0/kernel_amd64.go index 3577b5127..0feff8778 100644 --- a/pkg/sentry/platform/ring0/kernel_amd64.go +++ b/pkg/sentry/platform/ring0/kernel_amd64.go @@ -70,6 +70,14 @@ func (c *CPU) init() { c.tss.ist1Lo = uint32(stackAddr) c.tss.ist1Hi = uint32(stackAddr >> 32) + // Set the I/O bitmap base address beyond the last byte in the TSS + // to block access to the entire I/O address range. + // + // From section 18.5.2 "I/O Permission Bit Map" from Intel SDM vol1: + // I/O addresses not spanned by the map are treated as if they had set + // bits in the map. + c.tss.ioPerm = tssLimit + 1 + // Permanently set the kernel segments. c.registers.Cs = uint64(Kcode) c.registers.Ds = uint64(Kdata) diff --git a/pkg/sentry/platform/ring0/lib_amd64.go b/pkg/sentry/platform/ring0/lib_amd64.go index 9c5f26962..ca968a036 100644 --- a/pkg/sentry/platform/ring0/lib_amd64.go +++ b/pkg/sentry/platform/ring0/lib_amd64.go @@ -17,7 +17,7 @@ package ring0 import ( - "gvisor.googlesource.com/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/cpuid" ) // LoadFloatingPoint loads floating point state by the most efficient mechanism diff --git a/pkg/sentry/platform/ring0/pagetables/BUILD b/pkg/sentry/platform/ring0/pagetables/BUILD index fe93d3030..3b95af617 100644 --- a/pkg/sentry/platform/ring0/pagetables/BUILD +++ b/pkg/sentry/platform/ring0/pagetables/BUILD @@ -84,7 +84,7 @@ go_library( "walker_map.go", "walker_unmap.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0/pagetables", + importpath = "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables", visibility = [ "//pkg/sentry/platform/kvm:__subpackages__", "//pkg/sentry/platform/ring0:__subpackages__", diff --git a/pkg/sentry/platform/ring0/pagetables/allocator_unsafe.go b/pkg/sentry/platform/ring0/pagetables/allocator_unsafe.go index 1b996b4e2..a90394a33 100644 --- a/pkg/sentry/platform/ring0/pagetables/allocator_unsafe.go +++ b/pkg/sentry/platform/ring0/pagetables/allocator_unsafe.go @@ -17,7 +17,7 @@ package pagetables import ( "unsafe" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // newAlignedPTEs returns a set of aligned PTEs. diff --git a/pkg/sentry/platform/ring0/pagetables/pagetables.go b/pkg/sentry/platform/ring0/pagetables/pagetables.go index e5dcaada7..904f1a6de 100644 --- a/pkg/sentry/platform/ring0/pagetables/pagetables.go +++ b/pkg/sentry/platform/ring0/pagetables/pagetables.go @@ -21,7 +21,7 @@ package pagetables import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // PageTables is a set of page tables. diff --git a/pkg/sentry/platform/ring0/pagetables/pagetables_amd64_test.go b/pkg/sentry/platform/ring0/pagetables/pagetables_amd64_test.go index a1ec4b109..35e917526 100644 --- a/pkg/sentry/platform/ring0/pagetables/pagetables_amd64_test.go +++ b/pkg/sentry/platform/ring0/pagetables/pagetables_amd64_test.go @@ -19,7 +19,7 @@ package pagetables import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) func Test2MAnd4K(t *testing.T) { diff --git a/pkg/sentry/platform/ring0/pagetables/pagetables_test.go b/pkg/sentry/platform/ring0/pagetables/pagetables_test.go index 36e424495..6e95ad2b9 100644 --- a/pkg/sentry/platform/ring0/pagetables/pagetables_test.go +++ b/pkg/sentry/platform/ring0/pagetables/pagetables_test.go @@ -17,7 +17,7 @@ package pagetables import ( "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) type mapping struct { diff --git a/pkg/sentry/platform/ring0/pagetables/pagetables_x86.go b/pkg/sentry/platform/ring0/pagetables/pagetables_x86.go index ff427fbe9..3e2383c5e 100644 --- a/pkg/sentry/platform/ring0/pagetables/pagetables_x86.go +++ b/pkg/sentry/platform/ring0/pagetables/pagetables_x86.go @@ -19,7 +19,7 @@ package pagetables import ( "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // archPageTables is architecture-specific data. diff --git a/pkg/sentry/platform/ring0/x86.go b/pkg/sentry/platform/ring0/x86.go index 7e5ceafdb..5f80d64e8 100644 --- a/pkg/sentry/platform/ring0/x86.go +++ b/pkg/sentry/platform/ring0/x86.go @@ -17,7 +17,7 @@ package ring0 import ( - "gvisor.googlesource.com/gvisor/pkg/cpuid" + "gvisor.dev/gvisor/pkg/cpuid" ) // Useful bits. diff --git a/pkg/sentry/platform/safecopy/BUILD b/pkg/sentry/platform/safecopy/BUILD index d97a40297..924d8a6d6 100644 --- a/pkg/sentry/platform/safecopy/BUILD +++ b/pkg/sentry/platform/safecopy/BUILD @@ -16,7 +16,7 @@ go_library( "sighandler_amd64.s", "sighandler_arm64.s", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/platform/safecopy", + importpath = "gvisor.dev/gvisor/pkg/sentry/platform/safecopy", visibility = ["//pkg/sentry:internal"], deps = ["//pkg/syserror"], ) diff --git a/pkg/sentry/platform/safecopy/safecopy.go b/pkg/sentry/platform/safecopy/safecopy.go index 5126871eb..2fb7e5809 100644 --- a/pkg/sentry/platform/safecopy/safecopy.go +++ b/pkg/sentry/platform/safecopy/safecopy.go @@ -22,7 +22,7 @@ import ( "runtime" "syscall" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/syserror" ) // SegvError is returned when a safecopy function receives SIGSEGV. diff --git a/pkg/sentry/safemem/BUILD b/pkg/sentry/safemem/BUILD index 3ab453718..fd6dc8e6e 100644 --- a/pkg/sentry/safemem/BUILD +++ b/pkg/sentry/safemem/BUILD @@ -10,7 +10,7 @@ go_library( "safemem.go", "seq_unsafe.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/safemem", + importpath = "gvisor.dev/gvisor/pkg/sentry/safemem", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/sentry/platform/safecopy", diff --git a/pkg/sentry/safemem/block_unsafe.go b/pkg/sentry/safemem/block_unsafe.go index 1f72deb61..6f03c94bf 100644 --- a/pkg/sentry/safemem/block_unsafe.go +++ b/pkg/sentry/safemem/block_unsafe.go @@ -19,7 +19,7 @@ import ( "reflect" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/sentry/platform/safecopy" + "gvisor.dev/gvisor/pkg/sentry/platform/safecopy" ) // A Block is a range of contiguous bytes, similar to []byte but with the diff --git a/pkg/sentry/sighandling/BUILD b/pkg/sentry/sighandling/BUILD index cec3af92e..f561670c7 100644 --- a/pkg/sentry/sighandling/BUILD +++ b/pkg/sentry/sighandling/BUILD @@ -8,7 +8,7 @@ go_library( "sighandling.go", "sighandling_unsafe.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/sighandling", + importpath = "gvisor.dev/gvisor/pkg/sentry/sighandling", visibility = ["//pkg/sentry:internal"], deps = ["//pkg/abi/linux"], ) diff --git a/pkg/sentry/sighandling/sighandling.go b/pkg/sentry/sighandling/sighandling.go index 659b43363..2f65db70b 100644 --- a/pkg/sentry/sighandling/sighandling.go +++ b/pkg/sentry/sighandling/sighandling.go @@ -22,7 +22,7 @@ import ( "reflect" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) // numSignals is the number of normal (non-realtime) signals on Linux. diff --git a/pkg/sentry/sighandling/sighandling_unsafe.go b/pkg/sentry/sighandling/sighandling_unsafe.go index aca77888a..eace3766d 100644 --- a/pkg/sentry/sighandling/sighandling_unsafe.go +++ b/pkg/sentry/sighandling/sighandling_unsafe.go @@ -20,7 +20,7 @@ import ( "syscall" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) // TODO(b/34161764): Move to pkg/abi/linux along with definitions in diff --git a/pkg/sentry/socket/BUILD b/pkg/sentry/socket/BUILD index 076f953e7..2b03ea87c 100644 --- a/pkg/sentry/socket/BUILD +++ b/pkg/sentry/socket/BUILD @@ -5,7 +5,7 @@ load("//tools/go_stateify:defs.bzl", "go_library") go_library( name = "socket", srcs = ["socket.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", @@ -14,7 +14,6 @@ go_library( "//pkg/sentry/fs", "//pkg/sentry/fs/fsutil", "//pkg/sentry/kernel", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/time", "//pkg/sentry/socket/unix/transport", "//pkg/sentry/usermem", diff --git a/pkg/sentry/socket/control/BUILD b/pkg/sentry/socket/control/BUILD index 9f4763906..81dbd7309 100644 --- a/pkg/sentry/socket/control/BUILD +++ b/pkg/sentry/socket/control/BUILD @@ -5,9 +5,9 @@ load("//tools/go_stateify:defs.bzl", "go_library") go_library( name = "control", srcs = ["control.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/control", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/control", imports = [ - "gvisor.googlesource.com/gvisor/pkg/sentry/fs", + "gvisor.dev/gvisor/pkg/sentry/fs", ], visibility = ["//pkg/sentry:internal"], deps = [ @@ -17,7 +17,6 @@ go_library( "//pkg/sentry/fs", "//pkg/sentry/kernel", "//pkg/sentry/kernel/auth", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/socket/unix/transport", "//pkg/sentry/usermem", "//pkg/syserror", diff --git a/pkg/sentry/socket/control/control.go b/pkg/sentry/socket/control/control.go index 434d7ca2e..4f4a20dfe 100644 --- a/pkg/sentry/socket/control/control.go +++ b/pkg/sentry/socket/control/control.go @@ -17,16 +17,15 @@ package control import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) const maxInt = int(^uint(0) >> 1) @@ -63,7 +62,7 @@ type RightsFiles []*fs.File func NewSCMRights(t *kernel.Task, fds []int32) (SCMRights, error) { files := make(RightsFiles, 0, len(fds)) for _, fd := range fds { - file, _ := t.FDMap().GetDescriptor(kdefs.FD(fd)) + file := t.GetFile(fd) if file == nil { files.Release() return nil, syserror.EBADF @@ -109,7 +108,9 @@ func rightsFDs(t *kernel.Task, rights SCMRights, cloexec bool, max int) ([]int32 files, trunc := rights.Files(t, max) fds := make([]int32, 0, len(files)) for i := 0; i < max && len(files) > 0; i++ { - fd, err := t.FDMap().NewFDFrom(0, files[0], kernel.FDFlags{cloexec}, t.ThreadGroup().Limits()) + fd, err := t.NewFDFrom(0, files[0], kernel.FDFlags{ + CloseOnExec: cloexec, + }) files[0].DecRef() files = files[1:] if err != nil { @@ -315,8 +316,7 @@ func PackTimestamp(t *kernel.Task, timestamp int64, buf []byte) []byte { // Parse parses a raw socket control message into portable objects. func Parse(t *kernel.Task, socketOrEndpoint interface{}, buf []byte) (transport.ControlMessages, error) { var ( - fds linux.ControlMessageRights - + fds linux.ControlMessageRights haveCreds bool creds linux.ControlMessageCredentials ) diff --git a/pkg/sentry/socket/epsocket/BUILD b/pkg/sentry/socket/epsocket/BUILD index 7e2679ea0..1f014f399 100644 --- a/pkg/sentry/socket/epsocket/BUILD +++ b/pkg/sentry/socket/epsocket/BUILD @@ -11,7 +11,7 @@ go_library( "save_restore.go", "stack.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/epsocket", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/epsocket", visibility = [ "//pkg/sentry:internal", ], @@ -28,7 +28,6 @@ go_library( "//pkg/sentry/inet", "//pkg/sentry/kernel", "//pkg/sentry/kernel/auth", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/time", "//pkg/sentry/safemem", "//pkg/sentry/socket", diff --git a/pkg/sentry/socket/epsocket/device.go b/pkg/sentry/socket/epsocket/device.go index ab4083efe..85484d5b1 100644 --- a/pkg/sentry/socket/epsocket/device.go +++ b/pkg/sentry/socket/epsocket/device.go @@ -14,7 +14,7 @@ package epsocket -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" // epsocketDevice is the endpoint socket virtual device. var epsocketDevice = device.NewAnonDevice() diff --git a/pkg/sentry/socket/epsocket/epsocket.go b/pkg/sentry/socket/epsocket/epsocket.go index f67451179..69eff7373 100644 --- a/pkg/sentry/socket/epsocket/epsocket.go +++ b/pkg/sentry/socket/epsocket/epsocket.go @@ -31,28 +31,27 @@ import ( "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/unimpl" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/tcpip/buffer" - "gvisor.googlesource.com/gvisor/pkg/tcpip/stack" - "gvisor.googlesource.com/gvisor/pkg/tcpip/transport/tcp" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/unimpl" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/tcpip/buffer" + "gvisor.dev/gvisor/pkg/tcpip/stack" + "gvisor.dev/gvisor/pkg/tcpip/transport/tcp" + "gvisor.dev/gvisor/pkg/waiter" ) func mustCreateMetric(name, description string) *tcpip.StatCounter { @@ -262,7 +261,7 @@ func New(t *kernel.Task, family int, skType linux.SockType, protocol int, queue dirent := socket.NewDirent(t, epsocketDevice) defer dirent.DecRef() - return fs.NewFile(t, dirent, fs.FileFlags{Read: true, Write: true}, &SocketOperations{ + return fs.NewFile(t, dirent, fs.FileFlags{Read: true, Write: true, NonSeekable: true}, &SocketOperations{ Queue: queue, family: family, Endpoint: endpoint, @@ -286,14 +285,14 @@ func bytesToIPAddress(addr []byte) tcpip.Address { // GetAddress reads an sockaddr struct from the given address and converts it // to the FullAddress format. It supports AF_UNIX, AF_INET and AF_INET6 // addresses. -func GetAddress(sfamily int, addr []byte) (tcpip.FullAddress, *syserr.Error) { +func GetAddress(sfamily int, addr []byte, strict bool) (tcpip.FullAddress, *syserr.Error) { // Make sure we have at least 2 bytes for the address family. if len(addr) < 2 { return tcpip.FullAddress{}, syserr.ErrInvalidArgument } family := usermem.ByteOrder.Uint16(addr) - if family != uint16(sfamily) { + if family != uint16(sfamily) && (!strict && family != linux.AF_UNSPEC) { return tcpip.FullAddress{}, syserr.ErrAddressFamilyNotSupported } @@ -318,7 +317,7 @@ func GetAddress(sfamily int, addr []byte) (tcpip.FullAddress, *syserr.Error) { case linux.AF_INET: var a linux.SockAddrInet if len(addr) < sockAddrInetSize { - return tcpip.FullAddress{}, syserr.ErrBadAddress + return tcpip.FullAddress{}, syserr.ErrInvalidArgument } binary.Unmarshal(addr[:sockAddrInetSize], usermem.ByteOrder, &a) @@ -331,7 +330,7 @@ func GetAddress(sfamily int, addr []byte) (tcpip.FullAddress, *syserr.Error) { case linux.AF_INET6: var a linux.SockAddrInet6 if len(addr) < sockAddrInet6Size { - return tcpip.FullAddress{}, syserr.ErrBadAddress + return tcpip.FullAddress{}, syserr.ErrInvalidArgument } binary.Unmarshal(addr[:sockAddrInet6Size], usermem.ByteOrder, &a) @@ -344,6 +343,9 @@ func GetAddress(sfamily int, addr []byte) (tcpip.FullAddress, *syserr.Error) { } return out, nil + case linux.AF_UNSPEC: + return tcpip.FullAddress{}, nil + default: return tcpip.FullAddress{}, syserr.ErrAddressFamilyNotSupported } @@ -466,7 +468,7 @@ func (s *SocketOperations) Readiness(mask waiter.EventMask) waiter.EventMask { // Connect implements the linux syscall connect(2) for sockets backed by // tpcip.Endpoint. func (s *SocketOperations) Connect(t *kernel.Task, sockaddr []byte, blocking bool) *syserr.Error { - addr, err := GetAddress(s.family, sockaddr) + addr, err := GetAddress(s.family, sockaddr, false /* strict */) if err != nil { return err } @@ -499,7 +501,7 @@ func (s *SocketOperations) Connect(t *kernel.Task, sockaddr []byte, blocking boo // Bind implements the linux syscall bind(2) for sockets backed by // tcpip.Endpoint. func (s *SocketOperations) Bind(t *kernel.Task, sockaddr []byte) *syserr.Error { - addr, err := GetAddress(s.family, sockaddr) + addr, err := GetAddress(s.family, sockaddr, true /* strict */) if err != nil { return err } @@ -537,7 +539,7 @@ func (s *SocketOperations) blockingAccept(t *kernel.Task) (tcpip.Endpoint, *wait // Accept implements the linux syscall accept(2) for sockets backed by // tcpip.Endpoint. -func (s *SocketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (kdefs.FD, interface{}, uint32, *syserr.Error) { +func (s *SocketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, interface{}, uint32, *syserr.Error) { // Issue the accept request to get the new endpoint. ep, wq, terr := s.Endpoint.Accept() if terr != nil { @@ -575,10 +577,9 @@ func (s *SocketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, } } - fdFlags := kernel.FDFlags{ + fd, e := t.NewFDFrom(0, ns, kernel.FDFlags{ CloseOnExec: flags&linux.SOCK_CLOEXEC != 0, - } - fd, e := t.FDMap().NewFDFrom(0, ns, fdFlags, t.ThreadGroup().Limits()) + }) t.Kernel().RecordSocket(ns) @@ -668,12 +669,6 @@ func GetSockOpt(t *kernel.Task, s socket.Socket, ep commonEndpoint, family int, func getSockOptSocket(t *kernel.Task, s socket.Socket, ep commonEndpoint, family int, skType linux.SockType, name, outLen int) (interface{}, *syserr.Error) { // TODO(b/124056281): Stop rejecting short optLen values in getsockopt. switch name { - case linux.SO_TYPE: - if outLen < sizeOfInt32 { - return nil, syserr.ErrInvalidArgument - } - return int32(skType), nil - case linux.SO_ERROR: if outLen < sizeOfInt32 { return nil, syserr.ErrInvalidArgument @@ -872,6 +867,18 @@ func getSockOptTCP(t *kernel.Task, ep commonEndpoint, name, outLen int) (interfa return int32(v), nil + case linux.TCP_MAXSEG: + if outLen < sizeOfInt32 { + return nil, syserr.ErrInvalidArgument + } + + var v tcpip.MaxSegOption + if err := ep.GetSockOpt(&v); err != nil { + return nil, syserr.TranslateNetstackError(err) + } + + return int32(v), nil + case linux.TCP_KEEPIDLE: if outLen < sizeOfInt32 { return nil, syserr.ErrInvalidArgument @@ -920,6 +927,30 @@ func getSockOptTCP(t *kernel.Task, ep commonEndpoint, name, outLen int) (interfa t.Kernel().EmitUnimplementedEvent(t) + case linux.TCP_CONGESTION: + if outLen <= 0 { + return nil, syserr.ErrInvalidArgument + } + + var v tcpip.CongestionControlOption + if err := ep.GetSockOpt(&v); err != nil { + return nil, syserr.TranslateNetstackError(err) + } + + // We match linux behaviour here where it returns the lower of + // TCP_CA_NAME_MAX bytes or the value of the option length. + // + // This is Linux's net/tcp.h TCP_CA_NAME_MAX. + const tcpCANameMax = 16 + + toCopy := tcpCANameMax + if outLen < tcpCANameMax { + toCopy = outLen + } + b := make([]byte, toCopy) + copy(b, v) + return b, nil + default: emitUnimplementedEventTCP(t, name) } @@ -1200,6 +1231,14 @@ func setSockOptTCP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) * v := usermem.ByteOrder.Uint32(optVal) return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.QuickAckOption(v))) + case linux.TCP_MAXSEG: + if len(optVal) < sizeOfInt32 { + return syserr.ErrInvalidArgument + } + + v := usermem.ByteOrder.Uint32(optVal) + return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.MaxSegOption(v))) + case linux.TCP_KEEPIDLE: if len(optVal) < sizeOfInt32 { return syserr.ErrInvalidArgument @@ -1222,6 +1261,12 @@ func setSockOptTCP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) * } return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.KeepaliveIntervalOption(time.Second * time.Duration(v)))) + case linux.TCP_CONGESTION: + v := tcpip.CongestionControlOption(optVal) + if err := ep.SetSockOpt(v); err != nil { + return syserr.TranslateNetstackError(err) + } + return nil case linux.TCP_REPAIR_OPTIONS: t.Kernel().EmitUnimplementedEvent(t) @@ -1695,6 +1740,7 @@ func (s *SocketOperations) coalescingRead(ctx context.Context, dst usermem.IOSeq // If we managed to copy something, we must deliver it. if copied > 0 { + s.Endpoint.ModerateRecvBuf(copied) return copied, nil } @@ -1899,7 +1945,7 @@ func (s *SocketOperations) SendMsg(t *kernel.Task, src usermem.IOSequence, to [] var addr *tcpip.FullAddress if len(to) > 0 { - addrBuf, err := GetAddress(s.family, to) + addrBuf, err := GetAddress(s.family, to, true /* strict */) if err != nil { return 0, err } @@ -1968,7 +2014,7 @@ func (s *SocketOperations) SendMsg(t *kernel.Task, src usermem.IOSequence, to [] } // Ioctl implements fs.FileOperations.Ioctl. -func (s *SocketOperations) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (s *SocketOperations) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { // SIOCGSTAMP is implemented by epsocket rather than all commonEndpoint // sockets. // TODO(b/78348848): Add a commonEndpoint method to support SIOCGSTAMP. diff --git a/pkg/sentry/socket/epsocket/provider.go b/pkg/sentry/socket/epsocket/provider.go index 516582828..421f93dc4 100644 --- a/pkg/sentry/socket/epsocket/provider.go +++ b/pkg/sentry/socket/epsocket/provider.go @@ -17,20 +17,20 @@ package epsocket import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/tcpip/header" - "gvisor.googlesource.com/gvisor/pkg/tcpip/network/ipv4" - "gvisor.googlesource.com/gvisor/pkg/tcpip/network/ipv6" - "gvisor.googlesource.com/gvisor/pkg/tcpip/transport/tcp" - "gvisor.googlesource.com/gvisor/pkg/tcpip/transport/udp" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/pkg/tcpip/network/ipv4" + "gvisor.dev/gvisor/pkg/tcpip/network/ipv6" + "gvisor.dev/gvisor/pkg/tcpip/transport/tcp" + "gvisor.dev/gvisor/pkg/tcpip/transport/udp" + "gvisor.dev/gvisor/pkg/waiter" ) // provider is an inet socket provider. @@ -40,42 +40,49 @@ type provider struct { } // getTransportProtocol figures out transport protocol. Currently only TCP, -// UDP, and ICMP are supported. -func getTransportProtocol(ctx context.Context, stype linux.SockType, protocol int) (tcpip.TransportProtocolNumber, *syserr.Error) { +// UDP, and ICMP are supported. The bool return value is true when this socket +// is associated with a transport protocol. This is only false for SOCK_RAW, +// IPPROTO_IP sockets. +func getTransportProtocol(ctx context.Context, stype linux.SockType, protocol int) (tcpip.TransportProtocolNumber, bool, *syserr.Error) { switch stype { case linux.SOCK_STREAM: if protocol != 0 && protocol != syscall.IPPROTO_TCP { - return 0, syserr.ErrInvalidArgument + return 0, true, syserr.ErrInvalidArgument } - return tcp.ProtocolNumber, nil + return tcp.ProtocolNumber, true, nil case linux.SOCK_DGRAM: switch protocol { case 0, syscall.IPPROTO_UDP: - return udp.ProtocolNumber, nil + return udp.ProtocolNumber, true, nil case syscall.IPPROTO_ICMP: - return header.ICMPv4ProtocolNumber, nil + return header.ICMPv4ProtocolNumber, true, nil case syscall.IPPROTO_ICMPV6: - return header.ICMPv6ProtocolNumber, nil + return header.ICMPv6ProtocolNumber, true, nil } case linux.SOCK_RAW: // Raw sockets require CAP_NET_RAW. creds := auth.CredentialsFromContext(ctx) if !creds.HasCapability(linux.CAP_NET_RAW) { - return 0, syserr.ErrPermissionDenied + return 0, true, syserr.ErrPermissionDenied } switch protocol { case syscall.IPPROTO_ICMP: - return header.ICMPv4ProtocolNumber, nil + return header.ICMPv4ProtocolNumber, true, nil case syscall.IPPROTO_UDP: - return header.UDPProtocolNumber, nil + return header.UDPProtocolNumber, true, nil case syscall.IPPROTO_TCP: - return header.TCPProtocolNumber, nil + return header.TCPProtocolNumber, true, nil + // IPPROTO_RAW signifies that the raw socket isn't assigned to + // a transport protocol. Users will be able to write packets' + // IP headers and won't receive anything. + case syscall.IPPROTO_RAW: + return tcpip.TransportProtocolNumber(0), false, nil } } - return 0, syserr.ErrProtocolNotSupported + return 0, true, syserr.ErrProtocolNotSupported } // Socket creates a new socket object for the AF_INET or AF_INET6 family. @@ -93,7 +100,7 @@ func (p *provider) Socket(t *kernel.Task, stype linux.SockType, protocol int) (* } // Figure out the transport protocol. - transProto, err := getTransportProtocol(t, stype, protocol) + transProto, associated, err := getTransportProtocol(t, stype, protocol) if err != nil { return nil, err } @@ -103,7 +110,7 @@ func (p *provider) Socket(t *kernel.Task, stype linux.SockType, protocol int) (* var e *tcpip.Error wq := &waiter.Queue{} if stype == linux.SOCK_RAW { - ep, e = eps.Stack.NewRawEndpoint(transProto, p.netProto, wq) + ep, e = eps.Stack.NewRawEndpoint(transProto, p.netProto, wq, associated) } else { ep, e = eps.Stack.NewEndpoint(transProto, p.netProto, wq) } @@ -111,7 +118,7 @@ func (p *provider) Socket(t *kernel.Task, stype linux.SockType, protocol int) (* return nil, syserr.TranslateNetstackError(e) } - return New(t, p.family, stype, protocol, wq, ep) + return New(t, p.family, stype, int(transProto), wq, ep) } // Pair just returns nil sockets (not supported). diff --git a/pkg/sentry/socket/epsocket/save_restore.go b/pkg/sentry/socket/epsocket/save_restore.go index feaafb7cc..f7b8c10cc 100644 --- a/pkg/sentry/socket/epsocket/save_restore.go +++ b/pkg/sentry/socket/epsocket/save_restore.go @@ -15,7 +15,7 @@ package epsocket import ( - "gvisor.googlesource.com/gvisor/pkg/tcpip/stack" + "gvisor.dev/gvisor/pkg/tcpip/stack" ) // afterLoad is invoked by stateify. diff --git a/pkg/sentry/socket/epsocket/stack.go b/pkg/sentry/socket/epsocket/stack.go index edefa225b..7eef19f74 100644 --- a/pkg/sentry/socket/epsocket/stack.go +++ b/pkg/sentry/socket/epsocket/stack.go @@ -15,14 +15,14 @@ package epsocket import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/tcpip/network/ipv4" - "gvisor.googlesource.com/gvisor/pkg/tcpip/network/ipv6" - "gvisor.googlesource.com/gvisor/pkg/tcpip/stack" - "gvisor.googlesource.com/gvisor/pkg/tcpip/transport/tcp" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/tcpip/network/ipv4" + "gvisor.dev/gvisor/pkg/tcpip/network/ipv6" + "gvisor.dev/gvisor/pkg/tcpip/stack" + "gvisor.dev/gvisor/pkg/tcpip/transport/tcp" ) // Stack implements inet.Stack for netstack/tcpip/stack.Stack. @@ -138,3 +138,8 @@ func (s *Stack) TCPSACKEnabled() (bool, error) { func (s *Stack) SetTCPSACKEnabled(enabled bool) error { return syserr.TranslateNetstackError(s.Stack.SetTransportProtocolOption(tcp.ProtocolNumber, tcp.SACKEnabled(enabled))).ToError() } + +// Statistics implements inet.Stack.Statistics. +func (s *Stack) Statistics(stat interface{}, arg string) error { + return syserr.ErrEndpointOperation.ToError() +} diff --git a/pkg/sentry/socket/hostinet/BUILD b/pkg/sentry/socket/hostinet/BUILD index 975f47bc3..a951f1bb0 100644 --- a/pkg/sentry/socket/hostinet/BUILD +++ b/pkg/sentry/socket/hostinet/BUILD @@ -12,7 +12,7 @@ go_library( "socket_unsafe.go", "stack.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/hostinet", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/hostinet", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", @@ -26,7 +26,6 @@ go_library( "//pkg/sentry/fs/fsutil", "//pkg/sentry/inet", "//pkg/sentry/kernel", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/time", "//pkg/sentry/safemem", "//pkg/sentry/socket", diff --git a/pkg/sentry/socket/hostinet/device.go b/pkg/sentry/socket/hostinet/device.go index 4267e3691..27049d65f 100644 --- a/pkg/sentry/socket/hostinet/device.go +++ b/pkg/sentry/socket/hostinet/device.go @@ -14,6 +14,6 @@ package hostinet -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" var socketDevice = device.NewAnonDevice() diff --git a/pkg/sentry/socket/hostinet/socket.go b/pkg/sentry/socket/hostinet/socket.go index c62c8d8f1..7f69406b7 100644 --- a/pkg/sentry/socket/hostinet/socket.go +++ b/pkg/sentry/socket/hostinet/socket.go @@ -18,22 +18,21 @@ import ( "fmt" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/fdnotifier" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) const ( @@ -77,7 +76,7 @@ func newSocketFile(ctx context.Context, family int, stype linux.SockType, protoc } dirent := socket.NewDirent(ctx, socketDevice) defer dirent.DecRef() - return fs.NewFile(ctx, dirent, fs.FileFlags{NonBlocking: nonblock, Read: true, Write: true}, s), nil + return fs.NewFile(ctx, dirent, fs.FileFlags{NonBlocking: nonblock, Read: true, Write: true, NonSeekable: true}, s), nil } // Release implements fs.FileOperations.Release. @@ -190,7 +189,7 @@ func (s *socketOperations) Connect(t *kernel.Task, sockaddr []byte, blocking boo } // Accept implements socket.Socket.Accept. -func (s *socketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (kdefs.FD, interface{}, uint32, *syserr.Error) { +func (s *socketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, interface{}, uint32, *syserr.Error) { var peerAddr []byte var peerAddrlen uint32 var peerAddrPtr *byte @@ -236,11 +235,11 @@ func (s *socketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, } defer f.DecRef() - fdFlags := kernel.FDFlags{ + kfd, kerr := t.NewFDFrom(0, f, kernel.FDFlags{ CloseOnExec: flags&syscall.SOCK_CLOEXEC != 0, - } - kfd, kerr := t.FDMap().NewFDFrom(0, f, fdFlags, t.ThreadGroup().Limits()) + }) t.Kernel().RecordSocket(f) + return kfd, peerAddr, peerAddrlen, syserr.FromError(kerr) } @@ -288,7 +287,7 @@ func (s *socketOperations) GetSockOpt(t *kernel.Task, level int, name int, outLe } case syscall.SOL_SOCKET: switch name { - case syscall.SO_ERROR, syscall.SO_KEEPALIVE, syscall.SO_SNDBUF, syscall.SO_RCVBUF, syscall.SO_REUSEADDR, syscall.SO_TYPE: + case syscall.SO_ERROR, syscall.SO_KEEPALIVE, syscall.SO_SNDBUF, syscall.SO_RCVBUF, syscall.SO_REUSEADDR: optlen = sizeofInt32 case syscall.SO_LINGER: optlen = syscall.SizeofLinger diff --git a/pkg/sentry/socket/hostinet/socket_unsafe.go b/pkg/sentry/socket/hostinet/socket_unsafe.go index eed0c7837..6c69ba9c7 100644 --- a/pkg/sentry/socket/hostinet/socket_unsafe.go +++ b/pkg/sentry/socket/hostinet/socket_unsafe.go @@ -18,12 +18,13 @@ import ( "syscall" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/syserror" ) func firstBytePtr(bs []byte) unsafe.Pointer { @@ -52,7 +53,7 @@ func writev(fd int, srcs []syscall.Iovec) (uint64, error) { } // Ioctl implements fs.FileOperations.Ioctl. -func (s *socketOperations) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (s *socketOperations) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { switch cmd := uintptr(args[1].Int()); cmd { case syscall.TIOCINQ, syscall.TIOCOUTQ: var val int32 diff --git a/pkg/sentry/socket/hostinet/stack.go b/pkg/sentry/socket/hostinet/stack.go index 9c45991ba..cc1f66fa1 100644 --- a/pkg/sentry/socket/hostinet/stack.go +++ b/pkg/sentry/socket/hostinet/stack.go @@ -21,12 +21,12 @@ import ( "strings" "syscall" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) var defaultRecvBufSize = inet.TCPBufferSize{ @@ -244,3 +244,8 @@ func (s *Stack) TCPSACKEnabled() (bool, error) { func (s *Stack) SetTCPSACKEnabled(enabled bool) error { return syserror.EACCES } + +// Statistics implements inet.Stack.Statistics. +func (s *Stack) Statistics(stat interface{}, arg string) error { + return syserror.EOPNOTSUPP +} diff --git a/pkg/sentry/socket/netlink/BUILD b/pkg/sentry/socket/netlink/BUILD index 148306329..45ebb2a0e 100644 --- a/pkg/sentry/socket/netlink/BUILD +++ b/pkg/sentry/socket/netlink/BUILD @@ -9,7 +9,7 @@ go_library( "provider.go", "socket.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/netlink", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/netlink", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", @@ -20,7 +20,6 @@ go_library( "//pkg/sentry/fs", "//pkg/sentry/fs/fsutil", "//pkg/sentry/kernel", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/time", "//pkg/sentry/socket", "//pkg/sentry/socket/netlink/port", diff --git a/pkg/sentry/socket/netlink/message.go b/pkg/sentry/socket/netlink/message.go index 5bd3b49ce..ce0a1afd0 100644 --- a/pkg/sentry/socket/netlink/message.go +++ b/pkg/sentry/socket/netlink/message.go @@ -18,9 +18,9 @@ import ( "fmt" "math" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // alignUp rounds a length up to an alignment. diff --git a/pkg/sentry/socket/netlink/port/BUILD b/pkg/sentry/socket/netlink/port/BUILD index a7370a4ec..9e2e12799 100644 --- a/pkg/sentry/socket/netlink/port/BUILD +++ b/pkg/sentry/socket/netlink/port/BUILD @@ -5,7 +5,7 @@ load("//tools/go_stateify:defs.bzl", "go_library", "go_test") go_library( name = "port", srcs = ["port.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/netlink/port", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/netlink/port", visibility = ["//pkg/sentry:internal"], ) diff --git a/pkg/sentry/socket/netlink/provider.go b/pkg/sentry/socket/netlink/provider.go index 5dc103877..689cad997 100644 --- a/pkg/sentry/socket/netlink/provider.go +++ b/pkg/sentry/socket/netlink/provider.go @@ -17,12 +17,12 @@ package netlink import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/syserr" ) // Protocol is the implementation of a netlink socket protocol. @@ -89,7 +89,7 @@ func (*socketProvider) Socket(t *kernel.Task, stype linux.SockType, protocol int d := socket.NewDirent(t, netlinkSocketDevice) defer d.DecRef() - return fs.NewFile(t, d, fs.FileFlags{Read: true, Write: true}, s), nil + return fs.NewFile(t, d, fs.FileFlags{Read: true, Write: true, NonSeekable: true}, s), nil } // Pair implements socket.Provider.Pair by returning an error. diff --git a/pkg/sentry/socket/netlink/route/BUILD b/pkg/sentry/socket/netlink/route/BUILD index be0419679..5dc8533ec 100644 --- a/pkg/sentry/socket/netlink/route/BUILD +++ b/pkg/sentry/socket/netlink/route/BUILD @@ -5,7 +5,7 @@ load("//tools/go_stateify:defs.bzl", "go_library") go_library( name = "route", srcs = ["protocol.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/netlink/route", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/netlink/route", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/socket/netlink/route/protocol.go b/pkg/sentry/socket/netlink/route/protocol.go index 9f0a81403..fb1ff329c 100644 --- a/pkg/sentry/socket/netlink/route/protocol.go +++ b/pkg/sentry/socket/netlink/route/protocol.go @@ -18,13 +18,13 @@ package route import ( "bytes" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/netlink" - "gvisor.googlesource.com/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/socket/netlink" + "gvisor.dev/gvisor/pkg/syserr" ) // commandKind describes the operational class of a message type. diff --git a/pkg/sentry/socket/netlink/socket.go b/pkg/sentry/socket/netlink/socket.go index 62659784a..f3d6c1e9b 100644 --- a/pkg/sentry/socket/netlink/socket.go +++ b/pkg/sentry/socket/netlink/socket.go @@ -19,25 +19,24 @@ import ( "math" "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/netlink/port" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/socket/netlink/port" + "gvisor.dev/gvisor/pkg/sentry/socket/unix" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/waiter" ) const sizeOfInt32 int = 4 @@ -111,7 +110,7 @@ var _ socket.Socket = (*Socket)(nil) // NewSocket creates a new Socket. func NewSocket(t *kernel.Task, skType linux.SockType, protocol Protocol) (*Socket, *syserr.Error) { // Datagram endpoint used to buffer kernel -> user messages. - ep := transport.NewConnectionless() + ep := transport.NewConnectionless(t) // Bind the endpoint for good measure so we can connect to it. The // bound address will never be exposed. @@ -121,7 +120,7 @@ func NewSocket(t *kernel.Task, skType linux.SockType, protocol Protocol) (*Socke } // Create a connection from which the kernel can write messages. - connection, err := ep.(transport.BoundEndpoint).UnidirectionalConnect() + connection, err := ep.(transport.BoundEndpoint).UnidirectionalConnect(t) if err != nil { ep.Close() return nil, err @@ -173,7 +172,7 @@ func (s *Socket) EventUnregister(e *waiter.Entry) { } // Ioctl implements fs.FileOperations.Ioctl. -func (s *Socket) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (*Socket) Ioctl(context.Context, *fs.File, usermem.IO, arch.SyscallArguments) (uintptr, error) { // TODO(b/68878065): no ioctls supported. return 0, syserror.ENOTTY } @@ -272,7 +271,7 @@ func (s *Socket) Connect(t *kernel.Task, sockaddr []byte, blocking bool) *syserr } // Accept implements socket.Socket.Accept. -func (s *Socket) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (kdefs.FD, interface{}, uint32, *syserr.Error) { +func (s *Socket) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, interface{}, uint32, *syserr.Error) { // Netlink sockets never support accept. return 0, nil, 0, syserr.ErrNotSupported } diff --git a/pkg/sentry/socket/rpcinet/BUILD b/pkg/sentry/socket/rpcinet/BUILD index 33ba20de7..5061dcbde 100644 --- a/pkg/sentry/socket/rpcinet/BUILD +++ b/pkg/sentry/socket/rpcinet/BUILD @@ -12,7 +12,7 @@ go_library( "stack.go", "stack_unsafe.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet", visibility = ["//pkg/sentry:internal"], deps = [ ":syscall_rpc_go_proto", @@ -25,7 +25,6 @@ go_library( "//pkg/sentry/fs/fsutil", "//pkg/sentry/inet", "//pkg/sentry/kernel", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/time", "//pkg/sentry/socket", "//pkg/sentry/socket/hostinet", @@ -52,7 +51,7 @@ proto_library( go_proto_library( name = "syscall_rpc_go_proto", - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto", proto = ":syscall_rpc_proto", visibility = [ "//visibility:public", diff --git a/pkg/sentry/socket/rpcinet/conn/BUILD b/pkg/sentry/socket/rpcinet/conn/BUILD index 4336ae9b4..23eadcb1b 100644 --- a/pkg/sentry/socket/rpcinet/conn/BUILD +++ b/pkg/sentry/socket/rpcinet/conn/BUILD @@ -5,7 +5,7 @@ package(licenses = ["notice"]) go_library( name = "conn", srcs = ["conn.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/conn", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/conn", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/binary", diff --git a/pkg/sentry/socket/rpcinet/conn/conn.go b/pkg/sentry/socket/rpcinet/conn/conn.go index f537c7f63..356adad99 100644 --- a/pkg/sentry/socket/rpcinet/conn/conn.go +++ b/pkg/sentry/socket/rpcinet/conn/conn.go @@ -22,11 +22,11 @@ import ( "syscall" "github.com/golang/protobuf/proto" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/unet" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/unet" - pb "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto" + pb "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto" ) type request struct { diff --git a/pkg/sentry/socket/rpcinet/device.go b/pkg/sentry/socket/rpcinet/device.go index 44c0a39b7..8cfd5f6e5 100644 --- a/pkg/sentry/socket/rpcinet/device.go +++ b/pkg/sentry/socket/rpcinet/device.go @@ -14,6 +14,6 @@ package rpcinet -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" var socketDevice = device.NewAnonDevice() diff --git a/pkg/sentry/socket/rpcinet/notifier/BUILD b/pkg/sentry/socket/rpcinet/notifier/BUILD index b0b107ddb..a536f2e44 100644 --- a/pkg/sentry/socket/rpcinet/notifier/BUILD +++ b/pkg/sentry/socket/rpcinet/notifier/BUILD @@ -5,7 +5,7 @@ package(licenses = ["notice"]) go_library( name = "notifier", srcs = ["notifier.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/notifier", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/notifier", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/sentry/socket/rpcinet:syscall_rpc_go_proto", diff --git a/pkg/sentry/socket/rpcinet/notifier/notifier.go b/pkg/sentry/socket/rpcinet/notifier/notifier.go index 601e05994..aa157dd51 100644 --- a/pkg/sentry/socket/rpcinet/notifier/notifier.go +++ b/pkg/sentry/socket/rpcinet/notifier/notifier.go @@ -20,9 +20,9 @@ import ( "sync" "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/conn" - pb "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/conn" + pb "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto" + "gvisor.dev/gvisor/pkg/waiter" ) type fdInfo struct { diff --git a/pkg/sentry/socket/rpcinet/socket.go b/pkg/sentry/socket/rpcinet/socket.go index c22ff1ff0..ccaaddbfc 100644 --- a/pkg/sentry/socket/rpcinet/socket.go +++ b/pkg/sentry/socket/rpcinet/socket.go @@ -19,26 +19,25 @@ import ( "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/conn" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/notifier" - pb "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto" - "gvisor.googlesource.com/gvisor/pkg/sentry/unimpl" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/tcpip/buffer" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/conn" + "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/notifier" + pb "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto" + "gvisor.dev/gvisor/pkg/sentry/unimpl" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/tcpip/buffer" + "gvisor.dev/gvisor/pkg/waiter" ) // socketOperations implements fs.FileOperations and socket.Socket for a socket @@ -286,7 +285,7 @@ func rpcAccept(t *kernel.Task, fd uint32, peer bool) (*pb.AcceptResponse_ResultP } // Accept implements socket.Socket.Accept. -func (s *socketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (kdefs.FD, interface{}, uint32, *syserr.Error) { +func (s *socketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, interface{}, uint32, *syserr.Error) { payload, se := rpcAccept(t, s.fd, peerRequested) // Check if we need to block. @@ -322,7 +321,13 @@ func (s *socketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, dirent := socket.NewDirent(t, socketDevice) defer dirent.DecRef() - file := fs.NewFile(t, dirent, fs.FileFlags{Read: true, Write: true, NonBlocking: flags&linux.SOCK_NONBLOCK != 0}, &socketOperations{ + fileFlags := fs.FileFlags{ + Read: true, + Write: true, + NonSeekable: true, + NonBlocking: flags&linux.SOCK_NONBLOCK != 0, + } + file := fs.NewFile(t, dirent, fileFlags, &socketOperations{ wq: &wq, fd: payload.Fd, rpcConn: s.rpcConn, @@ -330,10 +335,9 @@ func (s *socketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, }) defer file.DecRef() - fdFlags := kernel.FDFlags{ + fd, err := t.NewFDFrom(0, file, kernel.FDFlags{ CloseOnExec: flags&linux.SOCK_CLOEXEC != 0, - } - fd, err := t.FDMap().NewFDFrom(0, file, fdFlags, t.ThreadGroup().Limits()) + }) if err != nil { return 0, nil, 0, syserr.FromError(err) } @@ -558,7 +562,7 @@ func ifconfIoctlFromStack(ctx context.Context, io usermem.IO, ifc *linux.IFConf) } // Ioctl implements fs.FileOperations.Ioctl. -func (s *socketOperations) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (s *socketOperations) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { t := ctx.(*kernel.Task) cmd := uint32(args[1].Int()) diff --git a/pkg/sentry/socket/rpcinet/stack.go b/pkg/sentry/socket/rpcinet/stack.go index a1be711df..49bd3a220 100644 --- a/pkg/sentry/socket/rpcinet/stack.go +++ b/pkg/sentry/socket/rpcinet/stack.go @@ -18,12 +18,12 @@ import ( "fmt" "syscall" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/hostinet" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/conn" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/notifier" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/unet" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/socket/hostinet" + "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/conn" + "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/notifier" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/unet" ) // Stack implements inet.Stack for RPC backed sockets. @@ -133,3 +133,8 @@ func (s *Stack) TCPSACKEnabled() (bool, error) { func (s *Stack) SetTCPSACKEnabled(enabled bool) error { panic("rpcinet handles procfs directly this method should not be called") } + +// Statistics implements inet.Stack.Statistics. +func (s *Stack) Statistics(stat interface{}, arg string) error { + return syserr.ErrEndpointOperation.ToError() +} diff --git a/pkg/sentry/socket/rpcinet/stack_unsafe.go b/pkg/sentry/socket/rpcinet/stack_unsafe.go index e53f578ba..a94bdad83 100644 --- a/pkg/sentry/socket/rpcinet/stack_unsafe.go +++ b/pkg/sentry/socket/rpcinet/stack_unsafe.go @@ -18,11 +18,11 @@ import ( "syscall" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - pb "gvisor.googlesource.com/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + pb "gvisor.dev/gvisor/pkg/sentry/socket/rpcinet/syscall_rpc_go_proto" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" ) // NewNetlinkRouteRequest builds a netlink message for getting the RIB, diff --git a/pkg/sentry/socket/socket.go b/pkg/sentry/socket/socket.go index d60944b6b..0efa58a58 100644 --- a/pkg/sentry/socket/socket.go +++ b/pkg/sentry/socket/socket.go @@ -21,18 +21,17 @@ import ( "fmt" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/device" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/device" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/tcpip" ) // ControlMessages represents the union of unix control messages and tcpip @@ -53,7 +52,7 @@ type Socket interface { // Accept implements the accept4(2) linux syscall. // Returns fd, real peer address length and error. Real peer address // length is only set if len(peer) > 0. - Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (kdefs.FD, interface{}, uint32, *syserr.Error) + Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, interface{}, uint32, *syserr.Error) // Bind implements the bind(2) linux syscall. Bind(t *kernel.Task, sockaddr []byte) *syserr.Error @@ -199,7 +198,7 @@ func NewDirent(ctx context.Context, d *device.Device) *fs.Dirent { User: fs.PermMask{Read: true, Write: true}, }, linux.SOCKFS_MAGIC), } - inode := fs.NewInode(iops, fs.NewPseudoMountSource(), fs.StableAttr{ + inode := fs.NewInode(ctx, iops, fs.NewPseudoMountSource(ctx), fs.StableAttr{ Type: fs.Socket, DeviceID: d.DeviceID(), InodeID: ino, @@ -207,7 +206,7 @@ func NewDirent(ctx context.Context, d *device.Device) *fs.Dirent { }) // Dirent name matches net/socket.c:sockfs_dname. - return fs.NewDirent(inode, fmt.Sprintf("socket:[%d]", ino)) + return fs.NewDirent(ctx, inode, fmt.Sprintf("socket:[%d]", ino)) } // SendReceiveTimeout stores timeouts for send and receive calls. diff --git a/pkg/sentry/socket/unix/BUILD b/pkg/sentry/socket/unix/BUILD index fe6871cc6..da9977fde 100644 --- a/pkg/sentry/socket/unix/BUILD +++ b/pkg/sentry/socket/unix/BUILD @@ -9,7 +9,7 @@ go_library( "io.go", "unix.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/unix", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", @@ -20,7 +20,6 @@ go_library( "//pkg/sentry/fs", "//pkg/sentry/fs/fsutil", "//pkg/sentry/kernel", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/time", "//pkg/sentry/safemem", "//pkg/sentry/socket", diff --git a/pkg/sentry/socket/unix/device.go b/pkg/sentry/socket/unix/device.go index 734d39ee6..db01ac4c9 100644 --- a/pkg/sentry/socket/unix/device.go +++ b/pkg/sentry/socket/unix/device.go @@ -14,7 +14,7 @@ package unix -import "gvisor.googlesource.com/gvisor/pkg/sentry/device" +import "gvisor.dev/gvisor/pkg/sentry/device" // unixSocketDevice is the unix socket virtual device. var unixSocketDevice = device.NewAnonDevice() diff --git a/pkg/sentry/socket/unix/io.go b/pkg/sentry/socket/unix/io.go index 5a1475ec2..760c7beab 100644 --- a/pkg/sentry/socket/unix/io.go +++ b/pkg/sentry/socket/unix/io.go @@ -15,15 +15,18 @@ package unix import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/tcpip" ) // EndpointWriter implements safemem.Writer that writes to a transport.Endpoint. // // EndpointWriter is not thread-safe. type EndpointWriter struct { + Ctx context.Context + // Endpoint is the transport.Endpoint to write to. Endpoint transport.Endpoint @@ -37,7 +40,7 @@ type EndpointWriter struct { // WriteFromBlocks implements safemem.Writer.WriteFromBlocks. func (w *EndpointWriter) WriteFromBlocks(srcs safemem.BlockSeq) (uint64, error) { return safemem.FromVecWriterFunc{func(bufs [][]byte) (int64, error) { - n, err := w.Endpoint.SendMsg(bufs, w.Control, w.To) + n, err := w.Endpoint.SendMsg(w.Ctx, bufs, w.Control, w.To) if err != nil { return int64(n), err.ToError() } @@ -50,6 +53,8 @@ func (w *EndpointWriter) WriteFromBlocks(srcs safemem.BlockSeq) (uint64, error) // // EndpointReader is not thread-safe. type EndpointReader struct { + Ctx context.Context + // Endpoint is the transport.Endpoint to read from. Endpoint transport.Endpoint @@ -81,7 +86,7 @@ type EndpointReader struct { // ReadToBlocks implements safemem.Reader.ReadToBlocks. func (r *EndpointReader) ReadToBlocks(dsts safemem.BlockSeq) (uint64, error) { return safemem.FromVecReaderFunc{func(bufs [][]byte) (int64, error) { - n, ms, c, ct, err := r.Endpoint.RecvMsg(bufs, r.Creds, r.NumRights, r.Peek, r.From) + n, ms, c, ct, err := r.Endpoint.RecvMsg(r.Ctx, bufs, r.Creds, r.NumRights, r.Peek, r.From) r.Control = c r.ControlTrunc = ct r.MsgSize = ms diff --git a/pkg/sentry/socket/unix/transport/BUILD b/pkg/sentry/socket/unix/transport/BUILD index 52f324eed..0b0240336 100644 --- a/pkg/sentry/socket/unix/transport/BUILD +++ b/pkg/sentry/socket/unix/transport/BUILD @@ -25,12 +25,13 @@ go_library( "transport_message_list.go", "unix.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport", + importpath = "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport", visibility = ["//:sandbox"], deps = [ "//pkg/abi/linux", "//pkg/ilist", "//pkg/refs", + "//pkg/sentry/context", "//pkg/syserr", "//pkg/tcpip", "//pkg/tcpip/buffer", diff --git a/pkg/sentry/socket/unix/transport/connectioned.go b/pkg/sentry/socket/unix/transport/connectioned.go index db79ac904..73d2df15d 100644 --- a/pkg/sentry/socket/unix/transport/connectioned.go +++ b/pkg/sentry/socket/unix/transport/connectioned.go @@ -17,10 +17,11 @@ package transport import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/waiter" ) // UniqueIDProvider generates a sequence of unique identifiers useful for, @@ -111,8 +112,13 @@ type connectionedEndpoint struct { acceptedChan chan *connectionedEndpoint `state:".([]*connectionedEndpoint)"` } +var ( + _ = BoundEndpoint((*connectionedEndpoint)(nil)) + _ = Endpoint((*connectionedEndpoint)(nil)) +) + // NewConnectioned creates a new unbound connectionedEndpoint. -func NewConnectioned(stype linux.SockType, uid UniqueIDProvider) Endpoint { +func NewConnectioned(ctx context.Context, stype linux.SockType, uid UniqueIDProvider) Endpoint { return &connectionedEndpoint{ baseEndpoint: baseEndpoint{Queue: &waiter.Queue{}}, id: uid.UniqueID(), @@ -122,7 +128,7 @@ func NewConnectioned(stype linux.SockType, uid UniqueIDProvider) Endpoint { } // NewPair allocates a new pair of connected unix-domain connectionedEndpoints. -func NewPair(stype linux.SockType, uid UniqueIDProvider) (Endpoint, Endpoint) { +func NewPair(ctx context.Context, stype linux.SockType, uid UniqueIDProvider) (Endpoint, Endpoint) { a := &connectionedEndpoint{ baseEndpoint: baseEndpoint{Queue: &waiter.Queue{}}, id: uid.UniqueID(), @@ -137,7 +143,9 @@ func NewPair(stype linux.SockType, uid UniqueIDProvider) (Endpoint, Endpoint) { } q1 := &queue{ReaderQueue: a.Queue, WriterQueue: b.Queue, limit: initialLimit} + q1.EnableLeakCheck("transport.queue") q2 := &queue{ReaderQueue: b.Queue, WriterQueue: a.Queue, limit: initialLimit} + q2.EnableLeakCheck("transport.queue") if stype == linux.SOCK_STREAM { a.receiver = &streamQueueReceiver{queueReceiver: queueReceiver{q1}} @@ -163,7 +171,7 @@ func NewPair(stype linux.SockType, uid UniqueIDProvider) (Endpoint, Endpoint) { // NewExternal creates a new externally backed Endpoint. It behaves like a // socketpair. -func NewExternal(stype linux.SockType, uid UniqueIDProvider, queue *waiter.Queue, receiver Receiver, connected ConnectedEndpoint) Endpoint { +func NewExternal(ctx context.Context, stype linux.SockType, uid UniqueIDProvider, queue *waiter.Queue, receiver Receiver, connected ConnectedEndpoint) Endpoint { return &connectionedEndpoint{ baseEndpoint: baseEndpoint{Queue: queue, receiver: receiver, connected: connected}, id: uid.UniqueID(), @@ -238,7 +246,7 @@ func (e *connectionedEndpoint) Close() { } // BidirectionalConnect implements BoundEndpoint.BidirectionalConnect. -func (e *connectionedEndpoint) BidirectionalConnect(ce ConnectingEndpoint, returnConnect func(Receiver, ConnectedEndpoint)) *syserr.Error { +func (e *connectionedEndpoint) BidirectionalConnect(ctx context.Context, ce ConnectingEndpoint, returnConnect func(Receiver, ConnectedEndpoint)) *syserr.Error { if ce.Type() != e.stype { return syserr.ErrConnectionRefused } @@ -288,12 +296,14 @@ func (e *connectionedEndpoint) BidirectionalConnect(ce ConnectingEndpoint, retur } readQueue := &queue{ReaderQueue: ce.WaiterQueue(), WriterQueue: ne.Queue, limit: initialLimit} + readQueue.EnableLeakCheck("transport.queue") ne.connected = &connectedEndpoint{ endpoint: ce, writeQueue: readQueue, } writeQueue := &queue{ReaderQueue: ne.Queue, WriterQueue: ce.WaiterQueue(), limit: initialLimit} + writeQueue.EnableLeakCheck("transport.queue") if e.stype == linux.SOCK_STREAM { ne.receiver = &streamQueueReceiver{queueReceiver: queueReceiver{readQueue: writeQueue}} } else { @@ -334,19 +344,19 @@ func (e *connectionedEndpoint) BidirectionalConnect(ce ConnectingEndpoint, retur } // UnidirectionalConnect implements BoundEndpoint.UnidirectionalConnect. -func (e *connectionedEndpoint) UnidirectionalConnect() (ConnectedEndpoint, *syserr.Error) { +func (e *connectionedEndpoint) UnidirectionalConnect(ctx context.Context) (ConnectedEndpoint, *syserr.Error) { return nil, syserr.ErrConnectionRefused } // Connect attempts to directly connect to another Endpoint. // Implements Endpoint.Connect. -func (e *connectionedEndpoint) Connect(server BoundEndpoint) *syserr.Error { +func (e *connectionedEndpoint) Connect(ctx context.Context, server BoundEndpoint) *syserr.Error { returnConnect := func(r Receiver, ce ConnectedEndpoint) { e.receiver = r e.connected = ce } - return server.BidirectionalConnect(e, returnConnect) + return server.BidirectionalConnect(ctx, e, returnConnect) } // Listen starts listening on the connection. @@ -426,13 +436,13 @@ func (e *connectionedEndpoint) Bind(addr tcpip.FullAddress, commit func() *syser // SendMsg writes data and a control message to the endpoint's peer. // This method does not block if the data cannot be written. -func (e *connectionedEndpoint) SendMsg(data [][]byte, c ControlMessages, to BoundEndpoint) (uintptr, *syserr.Error) { +func (e *connectionedEndpoint) SendMsg(ctx context.Context, data [][]byte, c ControlMessages, to BoundEndpoint) (uintptr, *syserr.Error) { // Stream sockets do not support specifying the endpoint. Seqpacket // sockets ignore the passed endpoint. if e.stype == linux.SOCK_STREAM && to != nil { return 0, syserr.ErrNotSupported } - return e.baseEndpoint.SendMsg(data, c, to) + return e.baseEndpoint.SendMsg(ctx, data, c, to) } // Readiness returns the current readiness of the connectionedEndpoint. For diff --git a/pkg/sentry/socket/unix/transport/connectionless.go b/pkg/sentry/socket/unix/transport/connectionless.go index 81ebfba10..c7f7c5b16 100644 --- a/pkg/sentry/socket/unix/transport/connectionless.go +++ b/pkg/sentry/socket/unix/transport/connectionless.go @@ -15,14 +15,15 @@ package transport import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/waiter" ) // connectionlessEndpoint is a unix endpoint for unix sockets that support operating in -// a conectionless fashon. +// a connectionless fashon. // // Specifically, this means datagram unix sockets not created with // socketpair(2). @@ -32,10 +33,17 @@ type connectionlessEndpoint struct { baseEndpoint } +var ( + _ = BoundEndpoint((*connectionlessEndpoint)(nil)) + _ = Endpoint((*connectionlessEndpoint)(nil)) +) + // NewConnectionless creates a new unbound dgram endpoint. -func NewConnectionless() Endpoint { +func NewConnectionless(ctx context.Context) Endpoint { ep := &connectionlessEndpoint{baseEndpoint{Queue: &waiter.Queue{}}} - ep.receiver = &queueReceiver{readQueue: &queue{ReaderQueue: ep.Queue, WriterQueue: &waiter.Queue{}, limit: initialLimit}} + q := queue{ReaderQueue: ep.Queue, WriterQueue: &waiter.Queue{}, limit: initialLimit} + q.EnableLeakCheck("transport.queue") + ep.receiver = &queueReceiver{readQueue: &q} return ep } @@ -46,38 +54,33 @@ func (e *connectionlessEndpoint) isBound() bool { // Close puts the endpoint in a closed state and frees all resources associated // with it. -// -// The socket will be a fresh state after a call to close and may be reused. -// That is, close may be used to "unbind" or "disconnect" the socket in error -// paths. func (e *connectionlessEndpoint) Close() { e.Lock() - var r Receiver - if e.Connected() { - e.receiver.CloseRecv() - r = e.receiver - e.receiver = nil - + if e.connected != nil { e.connected.Release() e.connected = nil } + if e.isBound() { e.path = "" } + + e.receiver.CloseRecv() + r := e.receiver + e.receiver = nil e.Unlock() - if r != nil { - r.CloseNotify() - r.Release() - } + + r.CloseNotify() + r.Release() } // BidirectionalConnect implements BoundEndpoint.BidirectionalConnect. -func (e *connectionlessEndpoint) BidirectionalConnect(ce ConnectingEndpoint, returnConnect func(Receiver, ConnectedEndpoint)) *syserr.Error { +func (e *connectionlessEndpoint) BidirectionalConnect(ctx context.Context, ce ConnectingEndpoint, returnConnect func(Receiver, ConnectedEndpoint)) *syserr.Error { return syserr.ErrConnectionRefused } // UnidirectionalConnect implements BoundEndpoint.UnidirectionalConnect. -func (e *connectionlessEndpoint) UnidirectionalConnect() (ConnectedEndpoint, *syserr.Error) { +func (e *connectionlessEndpoint) UnidirectionalConnect(ctx context.Context) (ConnectedEndpoint, *syserr.Error) { e.Lock() r := e.receiver e.Unlock() @@ -96,12 +99,12 @@ func (e *connectionlessEndpoint) UnidirectionalConnect() (ConnectedEndpoint, *sy // SendMsg writes data and a control message to the specified endpoint. // This method does not block if the data cannot be written. -func (e *connectionlessEndpoint) SendMsg(data [][]byte, c ControlMessages, to BoundEndpoint) (uintptr, *syserr.Error) { +func (e *connectionlessEndpoint) SendMsg(ctx context.Context, data [][]byte, c ControlMessages, to BoundEndpoint) (uintptr, *syserr.Error) { if to == nil { - return e.baseEndpoint.SendMsg(data, c, nil) + return e.baseEndpoint.SendMsg(ctx, data, c, nil) } - connected, err := to.UnidirectionalConnect() + connected, err := to.UnidirectionalConnect(ctx) if err != nil { return 0, syserr.ErrInvalidEndpointState } @@ -124,13 +127,16 @@ func (e *connectionlessEndpoint) Type() linux.SockType { } // Connect attempts to connect directly to server. -func (e *connectionlessEndpoint) Connect(server BoundEndpoint) *syserr.Error { - connected, err := server.UnidirectionalConnect() +func (e *connectionlessEndpoint) Connect(ctx context.Context, server BoundEndpoint) *syserr.Error { + connected, err := server.UnidirectionalConnect(ctx) if err != nil { return err } e.Lock() + if e.connected != nil { + e.connected.Release() + } e.connected = connected e.Unlock() diff --git a/pkg/sentry/socket/unix/transport/queue.go b/pkg/sentry/socket/unix/transport/queue.go index b650caae7..0415fae9a 100644 --- a/pkg/sentry/socket/unix/transport/queue.go +++ b/pkg/sentry/socket/unix/transport/queue.go @@ -17,9 +17,9 @@ package transport import ( "sync" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/waiter" ) // queue is a buffer queue. @@ -100,7 +100,7 @@ func (q *queue) IsWritable() bool { // Enqueue adds an entry to the data queue if room is available. // -// If truncate is true, Enqueue may truncate the message beforing enqueuing it. +// If truncate is true, Enqueue may truncate the message before enqueuing it. // Otherwise, the entire message must fit. If n < e.Length(), err indicates why. // // If notify is true, ReaderQueue.Notify must be called: diff --git a/pkg/sentry/socket/unix/transport/unix.go b/pkg/sentry/socket/unix/transport/unix.go index 5c55c529e..b0765ba55 100644 --- a/pkg/sentry/socket/unix/transport/unix.go +++ b/pkg/sentry/socket/unix/transport/unix.go @@ -19,11 +19,12 @@ import ( "sync" "sync/atomic" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/tcpip/buffer" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/tcpip/buffer" + "gvisor.dev/gvisor/pkg/waiter" ) // initialLimit is the starting limit for the socket buffers. @@ -120,13 +121,13 @@ type Endpoint interface { // CMTruncated indicates that the numRights hint was used to receive fewer // than the total available SCM_RIGHTS FDs. Additional truncation may be // required by the caller. - RecvMsg(data [][]byte, creds bool, numRights uintptr, peek bool, addr *tcpip.FullAddress) (recvLen, msgLen uintptr, cm ControlMessages, CMTruncated bool, err *syserr.Error) + RecvMsg(ctx context.Context, data [][]byte, creds bool, numRights uintptr, peek bool, addr *tcpip.FullAddress) (recvLen, msgLen uintptr, cm ControlMessages, CMTruncated bool, err *syserr.Error) // SendMsg writes data and a control message to the endpoint's peer. // This method does not block if the data cannot be written. // // SendMsg does not take ownership of any of its arguments on error. - SendMsg([][]byte, ControlMessages, BoundEndpoint) (uintptr, *syserr.Error) + SendMsg(context.Context, [][]byte, ControlMessages, BoundEndpoint) (uintptr, *syserr.Error) // Connect connects this endpoint directly to another. // @@ -134,7 +135,7 @@ type Endpoint interface { // endpoint passed in as a parameter. // // The error codes are the same as Connect. - Connect(server BoundEndpoint) *syserr.Error + Connect(ctx context.Context, server BoundEndpoint) *syserr.Error // Shutdown closes the read and/or write end of the endpoint connection // to its peer. @@ -215,7 +216,7 @@ type BoundEndpoint interface { // // This method will return syserr.ErrConnectionRefused on endpoints with a // type that isn't SockStream or SockSeqpacket. - BidirectionalConnect(ep ConnectingEndpoint, returnConnect func(Receiver, ConnectedEndpoint)) *syserr.Error + BidirectionalConnect(ctx context.Context, ep ConnectingEndpoint, returnConnect func(Receiver, ConnectedEndpoint)) *syserr.Error // UnidirectionalConnect establishes a write-only connection to a unix // endpoint. @@ -225,7 +226,7 @@ type BoundEndpoint interface { // // This method will return syserr.ErrConnectionRefused on a non-SockDgram // endpoint. - UnidirectionalConnect() (ConnectedEndpoint, *syserr.Error) + UnidirectionalConnect(ctx context.Context) (ConnectedEndpoint, *syserr.Error) // Passcred returns whether or not the SO_PASSCRED socket option is // enabled on this end. @@ -776,7 +777,7 @@ func (e *baseEndpoint) Connected() bool { } // RecvMsg reads data and a control message from the endpoint. -func (e *baseEndpoint) RecvMsg(data [][]byte, creds bool, numRights uintptr, peek bool, addr *tcpip.FullAddress) (uintptr, uintptr, ControlMessages, bool, *syserr.Error) { +func (e *baseEndpoint) RecvMsg(ctx context.Context, data [][]byte, creds bool, numRights uintptr, peek bool, addr *tcpip.FullAddress) (uintptr, uintptr, ControlMessages, bool, *syserr.Error) { e.Lock() if e.receiver == nil { @@ -802,7 +803,7 @@ func (e *baseEndpoint) RecvMsg(data [][]byte, creds bool, numRights uintptr, pee // SendMsg writes data and a control message to the endpoint's peer. // This method does not block if the data cannot be written. -func (e *baseEndpoint) SendMsg(data [][]byte, c ControlMessages, to BoundEndpoint) (uintptr, *syserr.Error) { +func (e *baseEndpoint) SendMsg(ctx context.Context, data [][]byte, c ControlMessages, to BoundEndpoint) (uintptr, *syserr.Error) { e.Lock() if !e.Connected() { e.Unlock() diff --git a/pkg/sentry/socket/unix/unix.go b/pkg/sentry/socket/unix/unix.go index b07e8d67b..eb262ecaf 100644 --- a/pkg/sentry/socket/unix/unix.go +++ b/pkg/sentry/socket/unix/unix.go @@ -21,24 +21,23 @@ import ( "strings" "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/refs" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/control" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/epsocket" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserr" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/tcpip" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/refs" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/socket/control" + "gvisor.dev/gvisor/pkg/sentry/socket/epsocket" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/waiter" ) // SocketOperations is a Unix socket. It is similar to an epsocket, except it @@ -64,15 +63,24 @@ type SocketOperations struct { func New(ctx context.Context, endpoint transport.Endpoint, stype linux.SockType) *fs.File { dirent := socket.NewDirent(ctx, unixSocketDevice) defer dirent.DecRef() - return NewWithDirent(ctx, dirent, endpoint, stype, fs.FileFlags{Read: true, Write: true}) + return NewWithDirent(ctx, dirent, endpoint, stype, fs.FileFlags{Read: true, Write: true, NonSeekable: true}) } // NewWithDirent creates a new unix socket using an existing dirent. func NewWithDirent(ctx context.Context, d *fs.Dirent, ep transport.Endpoint, stype linux.SockType, flags fs.FileFlags) *fs.File { - return fs.NewFile(ctx, d, flags, &SocketOperations{ + // You can create AF_UNIX, SOCK_RAW sockets. They're the same as + // SOCK_DGRAM and don't require CAP_NET_RAW. + if stype == linux.SOCK_RAW { + stype = linux.SOCK_DGRAM + } + + s := SocketOperations{ ep: ep, stype: stype, - }) + } + s.EnableLeakCheck("unix.SocketOperations") + + return fs.NewFile(ctx, d, flags, &s) } // DecRef implements RefCounter.DecRef. @@ -108,7 +116,7 @@ func (s *SocketOperations) Endpoint() transport.Endpoint { // extractPath extracts and validates the address. func extractPath(sockaddr []byte) (string, *syserr.Error) { - addr, err := epsocket.GetAddress(linux.AF_UNIX, sockaddr) + addr, err := epsocket.GetAddress(linux.AF_UNIX, sockaddr, true /* strict */) if err != nil { return "", err } @@ -152,7 +160,7 @@ func (s *SocketOperations) GetSockName(t *kernel.Task) (interface{}, uint32, *sy } // Ioctl implements fs.FileOperations.Ioctl. -func (s *SocketOperations) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { +func (s *SocketOperations) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { return epsocket.Ioctl(ctx, s.ep, io, args) } @@ -191,7 +199,7 @@ func (s *SocketOperations) blockingAccept(t *kernel.Task) (transport.Endpoint, * // Accept implements the linux syscall accept(2) for sockets backed by // a transport.Endpoint. -func (s *SocketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (kdefs.FD, interface{}, uint32, *syserr.Error) { +func (s *SocketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, interface{}, uint32, *syserr.Error) { // Issue the accept request to get the new endpoint. ep, err := s.ep.Accept() if err != nil { @@ -226,10 +234,9 @@ func (s *SocketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, } } - fdFlags := kernel.FDFlags{ + fd, e := t.NewFDFrom(0, ns, kernel.FDFlags{ CloseOnExec: flags&linux.SOCK_CLOEXEC != 0, - } - fd, e := t.FDMap().NewFDFrom(0, ns, fdFlags, t.ThreadGroup().Limits()) + }) if e != nil { return 0, nil, 0, syserr.FromError(e) } @@ -363,7 +370,7 @@ func (s *SocketOperations) Connect(t *kernel.Task, sockaddr []byte, blocking boo defer ep.Release() // Connect the server endpoint. - return s.ep.Connect(ep) + return s.ep.Connect(t, ep) } // Writev implements fs.FileOperations.Write. @@ -372,11 +379,12 @@ func (s *SocketOperations) Write(ctx context.Context, _ *fs.File, src usermem.IO ctrl := control.New(t, s.ep, nil) if src.NumBytes() == 0 { - nInt, err := s.ep.SendMsg([][]byte{}, ctrl, nil) + nInt, err := s.ep.SendMsg(ctx, [][]byte{}, ctrl, nil) return int64(nInt), err.ToError() } return src.CopyInTo(ctx, &EndpointWriter{ + Ctx: ctx, Endpoint: s.ep, Control: ctrl, To: nil, @@ -387,6 +395,7 @@ func (s *SocketOperations) Write(ctx context.Context, _ *fs.File, src usermem.IO // a transport.Endpoint. func (s *SocketOperations) SendMsg(t *kernel.Task, src usermem.IOSequence, to []byte, flags int, haveDeadline bool, deadline ktime.Time, controlMessages socket.ControlMessages) (int, *syserr.Error) { w := EndpointWriter{ + Ctx: t, Endpoint: s.ep, Control: controlMessages.Unix, To: nil, @@ -486,6 +495,7 @@ func (s *SocketOperations) Read(ctx context.Context, _ *fs.File, dst usermem.IOS return 0, nil } return dst.CopyOutFrom(ctx, &EndpointReader{ + Ctx: ctx, Endpoint: s.ep, NumRights: 0, Peek: false, @@ -522,6 +532,7 @@ func (s *SocketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags } r := EndpointReader{ + Ctx: t, Endpoint: s.ep, Creds: wantCreds, NumRights: uintptr(numRights), @@ -634,10 +645,10 @@ func (*provider) Socket(t *kernel.Task, stype linux.SockType, protocol int) (*fs // Create the endpoint and socket. var ep transport.Endpoint switch stype { - case linux.SOCK_DGRAM: - ep = transport.NewConnectionless() + case linux.SOCK_DGRAM, linux.SOCK_RAW: + ep = transport.NewConnectionless(t) case linux.SOCK_SEQPACKET, linux.SOCK_STREAM: - ep = transport.NewConnectioned(stype, t.Kernel()) + ep = transport.NewConnectioned(t, stype, t.Kernel()) default: return nil, syserr.ErrInvalidArgument } @@ -653,14 +664,14 @@ func (*provider) Pair(t *kernel.Task, stype linux.SockType, protocol int) (*fs.F } switch stype { - case linux.SOCK_STREAM, linux.SOCK_DGRAM, linux.SOCK_SEQPACKET: + case linux.SOCK_STREAM, linux.SOCK_DGRAM, linux.SOCK_SEQPACKET, linux.SOCK_RAW: // Ok default: return nil, nil, syserr.ErrInvalidArgument } // Create the endpoints and sockets. - ep1, ep2 := transport.NewPair(stype, t.Kernel()) + ep1, ep2 := transport.NewPair(t, stype, t.Kernel()) s1 := New(t, ep1, stype) s2 := New(t, ep2, stype) diff --git a/pkg/sentry/state/BUILD b/pkg/sentry/state/BUILD index cee18f681..f297ef3b7 100644 --- a/pkg/sentry/state/BUILD +++ b/pkg/sentry/state/BUILD @@ -9,7 +9,7 @@ go_library( "state_metadata.go", "state_unsafe.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/state", + importpath = "gvisor.dev/gvisor/pkg/sentry/state", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/state/state.go b/pkg/sentry/state/state.go index 27fde505b..026549756 100644 --- a/pkg/sentry/state/state.go +++ b/pkg/sentry/state/state.go @@ -19,12 +19,12 @@ import ( "fmt" "io" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/inet" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/watchdog" - "gvisor.googlesource.com/gvisor/pkg/state/statefile" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/inet" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/watchdog" + "gvisor.dev/gvisor/pkg/state/statefile" + "gvisor.dev/gvisor/pkg/syserror" ) var previousMetadata map[string]string diff --git a/pkg/sentry/state/state_metadata.go b/pkg/sentry/state/state_metadata.go index b8e128c40..cefd20b9b 100644 --- a/pkg/sentry/state/state_metadata.go +++ b/pkg/sentry/state/state_metadata.go @@ -18,7 +18,7 @@ import ( "fmt" "time" - "gvisor.googlesource.com/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/log" ) // The save metadata keys for timestamp. diff --git a/pkg/sentry/state/state_unsafe.go b/pkg/sentry/state/state_unsafe.go index 7745b6ac6..d271c6fc9 100644 --- a/pkg/sentry/state/state_unsafe.go +++ b/pkg/sentry/state/state_unsafe.go @@ -20,7 +20,7 @@ import ( "time" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi/linux" ) // CPUTime returns the CPU time usage by Sentry and app. diff --git a/pkg/sentry/strace/BUILD b/pkg/sentry/strace/BUILD index eaaa4d118..445d25010 100644 --- a/pkg/sentry/strace/BUILD +++ b/pkg/sentry/strace/BUILD @@ -18,7 +18,7 @@ go_library( "strace.go", "syscalls.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/strace", + importpath = "gvisor.dev/gvisor/pkg/sentry/strace", visibility = ["//:sandbox"], deps = [ ":strace_go_proto", @@ -30,7 +30,6 @@ go_library( "//pkg/seccomp", "//pkg/sentry/arch", "//pkg/sentry/kernel", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/socket/control", "//pkg/sentry/socket/epsocket", "//pkg/sentry/socket/netlink", @@ -47,7 +46,7 @@ proto_library( go_proto_library( name = "strace_go_proto", - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/strace/strace_go_proto", + importpath = "gvisor.dev/gvisor/pkg/sentry/strace/strace_go_proto", proto = ":strace_proto", visibility = ["//visibility:public"], ) diff --git a/pkg/sentry/strace/capability.go b/pkg/sentry/strace/capability.go index f85d6636e..3255dc18d 100644 --- a/pkg/sentry/strace/capability.go +++ b/pkg/sentry/strace/capability.go @@ -15,11 +15,11 @@ package strace import ( - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" ) -// CapabilityBitset is the set of capabilties in a bitset. +// CapabilityBitset is the set of capabilities in a bitset. var CapabilityBitset = abi.FlagSet{ { Flag: 1 << uint32(linux.CAP_CHOWN), diff --git a/pkg/sentry/strace/clone.go b/pkg/sentry/strace/clone.go index ff6a432c6..e99158712 100644 --- a/pkg/sentry/strace/clone.go +++ b/pkg/sentry/strace/clone.go @@ -17,7 +17,7 @@ package strace import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi" ) // CloneFlagSet is the set of clone(2) flags. diff --git a/pkg/sentry/strace/futex.go b/pkg/sentry/strace/futex.go index 24301bda6..d55c4080e 100644 --- a/pkg/sentry/strace/futex.go +++ b/pkg/sentry/strace/futex.go @@ -15,8 +15,8 @@ package strace import ( - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" ) // FutexCmd are the possible futex(2) commands. diff --git a/pkg/sentry/strace/open.go b/pkg/sentry/strace/open.go index 140727b02..e40bcb53b 100644 --- a/pkg/sentry/strace/open.go +++ b/pkg/sentry/strace/open.go @@ -17,7 +17,7 @@ package strace import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi" ) // OpenMode represents the mode to open(2) a file. diff --git a/pkg/sentry/strace/poll.go b/pkg/sentry/strace/poll.go index 15605187d..5187594a7 100644 --- a/pkg/sentry/strace/poll.go +++ b/pkg/sentry/strace/poll.go @@ -18,12 +18,11 @@ import ( "fmt" "strings" - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - slinux "gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel" + slinux "gvisor.dev/gvisor/pkg/sentry/syscalls/linux" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // PollEventSet is the set of poll(2) event flags. @@ -50,7 +49,7 @@ func pollFD(t *kernel.Task, pfd *linux.PollFD, post bool) string { if post { revents = PollEventSet.Parse(uint64(pfd.REvents)) } - return fmt.Sprintf("{FD: %s, Events: %s, REvents: %s}", fd(t, kdefs.FD(pfd.FD)), PollEventSet.Parse(uint64(pfd.Events)), revents) + return fmt.Sprintf("{FD: %s, Events: %s, REvents: %s}", fd(t, pfd.FD), PollEventSet.Parse(uint64(pfd.Events)), revents) } func pollFDs(t *kernel.Task, addr usermem.Addr, nfds uint, post bool) string { diff --git a/pkg/sentry/strace/ptrace.go b/pkg/sentry/strace/ptrace.go index 485aacb8a..338bafc6c 100644 --- a/pkg/sentry/strace/ptrace.go +++ b/pkg/sentry/strace/ptrace.go @@ -15,8 +15,8 @@ package strace import ( - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" ) // PtraceRequestSet are the possible ptrace(2) requests. diff --git a/pkg/sentry/strace/signal.go b/pkg/sentry/strace/signal.go index f82460e1c..5656d53eb 100644 --- a/pkg/sentry/strace/signal.go +++ b/pkg/sentry/strace/signal.go @@ -18,10 +18,10 @@ import ( "fmt" "strings" - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // signalNames contains the names of all named signals. diff --git a/pkg/sentry/strace/socket.go b/pkg/sentry/strace/socket.go index 0b5ef84c4..386b40af7 100644 --- a/pkg/sentry/strace/socket.go +++ b/pkg/sentry/strace/socket.go @@ -18,15 +18,15 @@ import ( "fmt" "strings" - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/control" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/epsocket" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/netlink" - slinux "gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/socket/control" + "gvisor.dev/gvisor/pkg/sentry/socket/epsocket" + "gvisor.dev/gvisor/pkg/sentry/socket/netlink" + slinux "gvisor.dev/gvisor/pkg/sentry/syscalls/linux" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // SocketFamily are the possible socket(2) families. @@ -332,7 +332,7 @@ func sockAddr(t *kernel.Task, addr usermem.Addr, length uint32) string { switch family { case linux.AF_INET, linux.AF_INET6, linux.AF_UNIX: - fa, err := epsocket.GetAddress(int(family), b) + fa, err := epsocket.GetAddress(int(family), b, true /* strict */) if err != nil { return fmt.Sprintf("%#x {Family: %s, error extracting address: %v}", addr, familyStr, err) } diff --git a/pkg/sentry/strace/strace.go b/pkg/sentry/strace/strace.go index f4c1be4ce..311389547 100644 --- a/pkg/sentry/strace/strace.go +++ b/pkg/sentry/strace/strace.go @@ -24,17 +24,16 @@ import ( "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/bits" - "gvisor.googlesource.com/gvisor/pkg/eventchannel" - "gvisor.googlesource.com/gvisor/pkg/seccomp" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - pb "gvisor.googlesource.com/gvisor/pkg/sentry/strace/strace_go_proto" - slinux "gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/bits" + "gvisor.dev/gvisor/pkg/eventchannel" + "gvisor.dev/gvisor/pkg/seccomp" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + pb "gvisor.dev/gvisor/pkg/sentry/strace/strace_go_proto" + slinux "gvisor.dev/gvisor/pkg/sentry/syscalls/linux" + "gvisor.dev/gvisor/pkg/sentry/usermem" ) // DefaultLogMaximumSize is the default LogMaximumSize. @@ -133,7 +132,7 @@ func path(t *kernel.Task, addr usermem.Addr) string { return fmt.Sprintf("%#x %s", addr, path) } -func fd(t *kernel.Task, fd kdefs.FD) string { +func fd(t *kernel.Task, fd int32) string { root := t.FSContext().RootDirectory() if root != nil { defer root.DecRef() @@ -151,7 +150,7 @@ func fd(t *kernel.Task, fd kdefs.FD) string { return fmt.Sprintf("AT_FDCWD %s", name) } - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { // Cast FD to uint64 to avoid printing negative hex. return fmt.Sprintf("%#x (bad FD)", uint64(fd)) @@ -375,7 +374,7 @@ func (i *SyscallInfo) pre(t *kernel.Task, args arch.SyscallArguments, maximumBlo } switch i.format[arg] { case FD: - output = append(output, fd(t, kdefs.FD(args[arg].Int()))) + output = append(output, fd(t, args[arg].Int())) case WriteBuffer: output = append(output, dump(t, args[arg].Pointer(), args[arg+1].SizeT(), maximumBlobSize)) case WriteIOVec: diff --git a/pkg/sentry/strace/syscalls.go b/pkg/sentry/strace/syscalls.go index eae2d6c12..3c389d375 100644 --- a/pkg/sentry/strace/syscalls.go +++ b/pkg/sentry/strace/syscalls.go @@ -15,9 +15,9 @@ package strace import ( - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" ) // FormatSpecifier values describe how an individual syscall argument should be diff --git a/pkg/sentry/syscalls/BUILD b/pkg/sentry/syscalls/BUILD index 877318fa9..79d972202 100644 --- a/pkg/sentry/syscalls/BUILD +++ b/pkg/sentry/syscalls/BUILD @@ -8,14 +8,13 @@ go_library( "epoll.go", "syscalls.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/syscalls", + importpath = "gvisor.dev/gvisor/pkg/sentry/syscalls", visibility = ["//:sandbox"], deps = [ "//pkg/abi/linux", "//pkg/sentry/arch", "//pkg/sentry/kernel", "//pkg/sentry/kernel/epoll", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/time", "//pkg/syserror", "//pkg/waiter", diff --git a/pkg/sentry/syscalls/epoll.go b/pkg/sentry/syscalls/epoll.go index ec1eab331..87dcad18b 100644 --- a/pkg/sentry/syscalls/epoll.go +++ b/pkg/sentry/syscalls/epoll.go @@ -15,25 +15,23 @@ package syscalls import ( - "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/epoll" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/epoll" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // CreateEpoll implements the epoll_create(2) linux syscall. -func CreateEpoll(t *kernel.Task, closeOnExec bool) (kdefs.FD, error) { +func CreateEpoll(t *kernel.Task, closeOnExec bool) (int32, error) { file := epoll.NewEventPoll(t) defer file.DecRef() - flags := kernel.FDFlags{ + fd, err := t.NewFDFrom(0, file, kernel.FDFlags{ CloseOnExec: closeOnExec, - } - fd, err := t.FDMap().NewFDFrom(0, file, flags, t.ThreadGroup().Limits()) + }) if err != nil { return 0, err } @@ -42,25 +40,25 @@ func CreateEpoll(t *kernel.Task, closeOnExec bool) (kdefs.FD, error) { } // AddEpoll implements the epoll_ctl(2) linux syscall when op is EPOLL_CTL_ADD. -func AddEpoll(t *kernel.Task, epfd kdefs.FD, fd kdefs.FD, flags epoll.EntryFlags, mask waiter.EventMask, userData [2]int32) error { +func AddEpoll(t *kernel.Task, epfd int32, fd int32, flags epoll.EntryFlags, mask waiter.EventMask, userData [2]int32) error { // Get epoll from the file descriptor. - epollfile := t.FDMap().GetFile(epfd) + epollfile := t.GetFile(epfd) if epollfile == nil { - return syscall.EBADF + return syserror.EBADF } defer epollfile.DecRef() // Get the target file id. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return syscall.EBADF + return syserror.EBADF } defer file.DecRef() // Extract the epollPoll operations. e, ok := epollfile.FileOperations.(*epoll.EventPoll) if !ok { - return syscall.EBADF + return syserror.EBADF } // Try to add the entry. @@ -68,25 +66,25 @@ func AddEpoll(t *kernel.Task, epfd kdefs.FD, fd kdefs.FD, flags epoll.EntryFlags } // UpdateEpoll implements the epoll_ctl(2) linux syscall when op is EPOLL_CTL_MOD. -func UpdateEpoll(t *kernel.Task, epfd kdefs.FD, fd kdefs.FD, flags epoll.EntryFlags, mask waiter.EventMask, userData [2]int32) error { +func UpdateEpoll(t *kernel.Task, epfd int32, fd int32, flags epoll.EntryFlags, mask waiter.EventMask, userData [2]int32) error { // Get epoll from the file descriptor. - epollfile := t.FDMap().GetFile(epfd) + epollfile := t.GetFile(epfd) if epollfile == nil { - return syscall.EBADF + return syserror.EBADF } defer epollfile.DecRef() // Get the target file id. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return syscall.EBADF + return syserror.EBADF } defer file.DecRef() // Extract the epollPoll operations. e, ok := epollfile.FileOperations.(*epoll.EventPoll) if !ok { - return syscall.EBADF + return syserror.EBADF } // Try to update the entry. @@ -94,25 +92,25 @@ func UpdateEpoll(t *kernel.Task, epfd kdefs.FD, fd kdefs.FD, flags epoll.EntryFl } // RemoveEpoll implements the epoll_ctl(2) linux syscall when op is EPOLL_CTL_DEL. -func RemoveEpoll(t *kernel.Task, epfd kdefs.FD, fd kdefs.FD) error { +func RemoveEpoll(t *kernel.Task, epfd int32, fd int32) error { // Get epoll from the file descriptor. - epollfile := t.FDMap().GetFile(epfd) + epollfile := t.GetFile(epfd) if epollfile == nil { - return syscall.EBADF + return syserror.EBADF } defer epollfile.DecRef() // Get the target file id. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return syscall.EBADF + return syserror.EBADF } defer file.DecRef() // Extract the epollPoll operations. e, ok := epollfile.FileOperations.(*epoll.EventPoll) if !ok { - return syscall.EBADF + return syserror.EBADF } // Try to remove the entry. @@ -120,18 +118,18 @@ func RemoveEpoll(t *kernel.Task, epfd kdefs.FD, fd kdefs.FD) error { } // WaitEpoll implements the epoll_wait(2) linux syscall. -func WaitEpoll(t *kernel.Task, fd kdefs.FD, max int, timeout int) ([]epoll.Event, error) { +func WaitEpoll(t *kernel.Task, fd int32, max int, timeout int) ([]epoll.Event, error) { // Get epoll from the file descriptor. - epollfile := t.FDMap().GetFile(fd) + epollfile := t.GetFile(fd) if epollfile == nil { - return nil, syscall.EBADF + return nil, syserror.EBADF } defer epollfile.DecRef() // Extract the epollPoll operations. e, ok := epollfile.FileOperations.(*epoll.EventPoll) if !ok { - return nil, syscall.EBADF + return nil, syserror.EBADF } // Try to read events and return right away if we got them or if the @@ -164,7 +162,7 @@ func WaitEpoll(t *kernel.Task, fd kdefs.FD, max int, timeout int) ([]epoll.Event } if err := t.BlockWithDeadline(ch, haveDeadline, deadline); err != nil { - if err == syscall.ETIMEDOUT { + if err == syserror.ETIMEDOUT { return nil, nil } diff --git a/pkg/sentry/syscalls/linux/BUILD b/pkg/sentry/syscalls/linux/BUILD index 1c057526b..33a40b9c6 100644 --- a/pkg/sentry/syscalls/linux/BUILD +++ b/pkg/sentry/syscalls/linux/BUILD @@ -49,7 +49,7 @@ go_library( "sys_write.go", "timespec.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux", + importpath = "gvisor.dev/gvisor/pkg/sentry/syscalls/linux", visibility = ["//:sandbox"], deps = [ "//pkg/abi", @@ -71,7 +71,6 @@ go_library( "//pkg/sentry/kernel/epoll", "//pkg/sentry/kernel/eventfd", "//pkg/sentry/kernel/fasync", - "//pkg/sentry/kernel/kdefs", "//pkg/sentry/kernel/pipe", "//pkg/sentry/kernel/sched", "//pkg/sentry/kernel/shm", @@ -86,6 +85,7 @@ go_library( "//pkg/sentry/syscalls", "//pkg/sentry/usage", "//pkg/sentry/usermem", + "//pkg/syserr", "//pkg/syserror", "//pkg/waiter", ], diff --git a/pkg/sentry/syscalls/linux/error.go b/pkg/sentry/syscalls/linux/error.go index 72146ea63..264301bfa 100644 --- a/pkg/sentry/syscalls/linux/error.go +++ b/pkg/sentry/syscalls/linux/error.go @@ -17,14 +17,13 @@ package linux import ( "io" "sync" - "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) var ( @@ -54,7 +53,7 @@ func handleIOError(t *kernel.Task, partialResult bool, err, intr error, op strin // Do not consume the error and return it as EFBIG. // Simultaneously send a SIGXFSZ per setrlimit(2). t.SendSignal(kernel.SignalInfoNoInfo(linux.SIGXFSZ, t, t)) - return syscall.EFBIG + return syserror.EFBIG case syserror.ErrInterrupted: // The syscall was interrupted. Return nil if it completed // partially, otherwise return the error code that the syscall diff --git a/pkg/sentry/syscalls/linux/flags.go b/pkg/sentry/syscalls/linux/flags.go index d83e12971..0c1b5ec27 100644 --- a/pkg/sentry/syscalls/linux/flags.go +++ b/pkg/sentry/syscalls/linux/flags.go @@ -15,8 +15,8 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/fs" ) // flagsToPermissions returns a Permissions object from Linux flags. diff --git a/pkg/sentry/syscalls/linux/linux64.go b/pkg/sentry/syscalls/linux/linux64.go index 5251c2463..51db2d8f7 100644 --- a/pkg/sentry/syscalls/linux/linux64.go +++ b/pkg/sentry/syscalls/linux/linux64.go @@ -16,15 +16,13 @@ package linux import ( - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/abi" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/syscalls" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/syscalls" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // AUDIT_ARCH_X86_64 identifies the Linux syscall API on AMD64, and is taken @@ -50,335 +48,336 @@ var AMD64 = &kernel.SyscallTable{ Table: map[uintptr]kernel.Syscall{ 0: syscalls.Supported("read", Read), 1: syscalls.Supported("write", Write), - 2: syscalls.Supported("open", Open), + 2: syscalls.PartiallySupported("open", Open, "Options O_DIRECT, O_NOATIME, O_PATH, O_TMPFILE, O_SYNC are not supported.", nil), 3: syscalls.Supported("close", Close), - 4: syscalls.Undocumented("stat", Stat), - 5: syscalls.Undocumented("fstat", Fstat), - 6: syscalls.Undocumented("lstat", Lstat), - 7: syscalls.Undocumented("poll", Poll), - 8: syscalls.Undocumented("lseek", Lseek), - 9: syscalls.Undocumented("mmap", Mmap), - 10: syscalls.Undocumented("mprotect", Mprotect), - 11: syscalls.Undocumented("munmap", Munmap), - 12: syscalls.Undocumented("brk", Brk), - 13: syscalls.Undocumented("rt_sigaction", RtSigaction), - 14: syscalls.Undocumented("rt_sigprocmask", RtSigprocmask), - 15: syscalls.Undocumented("rt_sigreturn", RtSigreturn), - 16: syscalls.Undocumented("ioctl", Ioctl), - 17: syscalls.Undocumented("pread64", Pread64), - 18: syscalls.Undocumented("pwrite64", Pwrite64), - 19: syscalls.Undocumented("readv", Readv), - 20: syscalls.Undocumented("writev", Writev), - 21: syscalls.Undocumented("access", Access), - 22: syscalls.Undocumented("pipe", Pipe), - 23: syscalls.Undocumented("select", Select), - 24: syscalls.Undocumented("sched_yield", SchedYield), - 25: syscalls.Undocumented("mremap", Mremap), - 26: syscalls.Undocumented("msync", Msync), - 27: syscalls.Undocumented("mincore", Mincore), - 28: syscalls.Undocumented("madvise", Madvise), - 29: syscalls.Undocumented("shmget", Shmget), - 30: syscalls.Undocumented("shmat", Shmat), - 31: syscalls.Undocumented("shmctl", Shmctl), - 32: syscalls.Undocumented("dup", Dup), - 33: syscalls.Undocumented("dup2", Dup2), - 34: syscalls.Undocumented("pause", Pause), - 35: syscalls.Undocumented("nanosleep", Nanosleep), - 36: syscalls.Undocumented("getitimer", Getitimer), - 37: syscalls.Undocumented("alarm", Alarm), - 38: syscalls.Undocumented("setitimer", Setitimer), - 39: syscalls.Undocumented("getpid", Getpid), - 40: syscalls.Undocumented("sendfile", Sendfile), - 41: syscalls.Undocumented("socket", Socket), - 42: syscalls.Undocumented("connect", Connect), - 43: syscalls.Undocumented("accept", Accept), - 44: syscalls.Undocumented("sendto", SendTo), - 45: syscalls.Undocumented("recvfrom", RecvFrom), - 46: syscalls.Undocumented("sendmsg", SendMsg), - 47: syscalls.Undocumented("recvmsg", RecvMsg), - 48: syscalls.Undocumented("shutdown", Shutdown), - 49: syscalls.Undocumented("bind", Bind), - 50: syscalls.Undocumented("listen", Listen), - 51: syscalls.Undocumented("getsockname", GetSockName), - 52: syscalls.Undocumented("getpeername", GetPeerName), - 53: syscalls.Undocumented("socketpair", SocketPair), - 54: syscalls.Undocumented("setsockopt", SetSockOpt), - 55: syscalls.Undocumented("getsockopt", GetSockOpt), - 56: syscalls.Undocumented("clone", Clone), - 57: syscalls.Undocumented("fork", Fork), - 58: syscalls.Undocumented("vfork", Vfork), - 59: syscalls.Undocumented("execve", Execve), - 60: syscalls.Undocumented("exit", Exit), - 61: syscalls.Undocumented("wait4", Wait4), - 62: syscalls.Undocumented("kill", Kill), - 63: syscalls.Undocumented("uname", Uname), - 64: syscalls.Undocumented("semget", Semget), - 65: syscalls.Undocumented("semop", Semop), - 66: syscalls.Undocumented("semctl", Semctl), - 67: syscalls.Undocumented("shmdt", Shmdt), - 68: syscalls.ErrorWithEvent("msgget", syscall.ENOSYS, "", []string{"gvisor.dev/issue/135"}), // TODO(b/29354921) - 69: syscalls.ErrorWithEvent("msgsnd", syscall.ENOSYS, "", []string{"gvisor.dev/issue/135"}), // TODO(b/29354921) - 70: syscalls.ErrorWithEvent("msgrcv", syscall.ENOSYS, "", []string{"gvisor.dev/issue/135"}), // TODO(b/29354921) - 71: syscalls.ErrorWithEvent("msgctl", syscall.ENOSYS, "", []string{"gvisor.dev/issue/135"}), // TODO(b/29354921) - 72: syscalls.Undocumented("fcntl", Fcntl), - 73: syscalls.Undocumented("flock", Flock), - 74: syscalls.Undocumented("fsync", Fsync), - 75: syscalls.Undocumented("fdatasync", Fdatasync), - 76: syscalls.Undocumented("truncate", Truncate), - 77: syscalls.Undocumented("ftruncate", Ftruncate), - 78: syscalls.Undocumented("getdents", Getdents), - 79: syscalls.Undocumented("getcwd", Getcwd), - 80: syscalls.Undocumented("chdir", Chdir), - 81: syscalls.Undocumented("fchdir", Fchdir), - 82: syscalls.Undocumented("rename", Rename), - 83: syscalls.Undocumented("mkdir", Mkdir), - 84: syscalls.Undocumented("rmdir", Rmdir), - 85: syscalls.Undocumented("creat", Creat), - 86: syscalls.Undocumented("link", Link), - 87: syscalls.Undocumented("link", Unlink), - 88: syscalls.Undocumented("symlink", Symlink), - 89: syscalls.Undocumented("readlink", Readlink), - 90: syscalls.Undocumented("chmod", Chmod), - 91: syscalls.Undocumented("fchmod", Fchmod), - 92: syscalls.Undocumented("chown", Chown), - 93: syscalls.Undocumented("fchown", Fchown), - 94: syscalls.Undocumented("lchown", Lchown), - 95: syscalls.Undocumented("umask", Umask), - 96: syscalls.Undocumented("gettimeofday", Gettimeofday), - 97: syscalls.Undocumented("getrlimit", Getrlimit), - 98: syscalls.Undocumented("getrusage", Getrusage), - 99: syscalls.Undocumented("sysinfo", Sysinfo), - 100: syscalls.Undocumented("times", Times), - 101: syscalls.Undocumented("ptrace", Ptrace), - 102: syscalls.Undocumented("getuid", Getuid), - 103: syscalls.Undocumented("syslog", Syslog), - 104: syscalls.Undocumented("getgid", Getgid), - 105: syscalls.Undocumented("setuid", Setuid), - 106: syscalls.Undocumented("setgid", Setgid), - 107: syscalls.Undocumented("geteuid", Geteuid), - 108: syscalls.Undocumented("getegid", Getegid), - 109: syscalls.Undocumented("setpgid", Setpgid), - 110: syscalls.Undocumented("getppid", Getppid), - 111: syscalls.Undocumented("getpgrp", Getpgrp), - 112: syscalls.Undocumented("setsid", Setsid), - 113: syscalls.Undocumented("setreuid", Setreuid), - 114: syscalls.Undocumented("setregid", Setregid), - 115: syscalls.Undocumented("getgroups", Getgroups), - 116: syscalls.Undocumented("setgroups", Setgroups), - 117: syscalls.Undocumented("setresuid", Setresuid), - 118: syscalls.Undocumented("getresuid", Getresuid), - 119: syscalls.Undocumented("setresgid", Setresgid), - 120: syscalls.Undocumented("setresgid", Getresgid), - 121: syscalls.Undocumented("getpgid", Getpgid), - 122: syscalls.ErrorWithEvent("setfsuid", syscall.ENOSYS, "", []string{"gvisor.dev/issue/260"}), // TODO(b/112851702) - 123: syscalls.ErrorWithEvent("setfsgid", syscall.ENOSYS, "", []string{"gvisor.dev/issue/260"}), // TODO(b/112851702) - 124: syscalls.Undocumented("getsid", Getsid), - 125: syscalls.Undocumented("capget", Capget), - 126: syscalls.Undocumented("capset", Capset), - 127: syscalls.Undocumented("rt_sigpending", RtSigpending), - 128: syscalls.Undocumented("rt_sigtimedwait", RtSigtimedwait), - 129: syscalls.Undocumented("rt_sigqueueinfo", RtSigqueueinfo), - 130: syscalls.Undocumented("rt_sigsuspend", RtSigsuspend), - 131: syscalls.Undocumented("sigaltstack", Sigaltstack), - 132: syscalls.Undocumented("utime", Utime), - 133: syscalls.Undocumented("mknod", Mknod), - 134: syscalls.Error("uselib", syscall.ENOSYS, "Obsolete", nil), - 135: syscalls.ErrorWithEvent("personality", syscall.EINVAL, "Unable to change personality.", nil), - 136: syscalls.ErrorWithEvent("ustat", syscall.ENOSYS, "Needs filesystem support.", nil), - 137: syscalls.Undocumented("statfs", Statfs), - 138: syscalls.Undocumented("fstatfs", Fstatfs), - 139: syscalls.ErrorWithEvent("sysfs", syscall.ENOSYS, "", []string{"gvisor.dev/issue/165"}), - 140: syscalls.Undocumented("getpriority", Getpriority), - 141: syscalls.Undocumented("setpriority", Setpriority), + 4: syscalls.Supported("stat", Stat), + 5: syscalls.Supported("fstat", Fstat), + 6: syscalls.Supported("lstat", Lstat), + 7: syscalls.Supported("poll", Poll), + 8: syscalls.Supported("lseek", Lseek), + 9: syscalls.PartiallySupported("mmap", Mmap, "Generally supported with exceptions. Options MAP_FIXED_NOREPLACE, MAP_SHARED_VALIDATE, MAP_SYNC MAP_GROWSDOWN, MAP_HUGETLB are not supported.", nil), + 10: syscalls.Supported("mprotect", Mprotect), + 11: syscalls.Supported("munmap", Munmap), + 12: syscalls.Supported("brk", Brk), + 13: syscalls.Supported("rt_sigaction", RtSigaction), + 14: syscalls.Supported("rt_sigprocmask", RtSigprocmask), + 15: syscalls.Supported("rt_sigreturn", RtSigreturn), + 16: syscalls.PartiallySupported("ioctl", Ioctl, "Only a few ioctls are implemented for backing devices and file systems.", nil), + 17: syscalls.Supported("pread64", Pread64), + 18: syscalls.Supported("pwrite64", Pwrite64), + 19: syscalls.Supported("readv", Readv), + 20: syscalls.Supported("writev", Writev), + 21: syscalls.Supported("access", Access), + 22: syscalls.Supported("pipe", Pipe), + 23: syscalls.Supported("select", Select), + 24: syscalls.Supported("sched_yield", SchedYield), + 25: syscalls.Supported("mremap", Mremap), + 26: syscalls.PartiallySupported("msync", Msync, "Full data flush is not guaranteed at this time.", nil), + 27: syscalls.PartiallySupported("mincore", Mincore, "Stub implementation. The sandbox does not have access to this information. Reports all mapped pages are resident.", nil), + 28: syscalls.PartiallySupported("madvise", Madvise, "Options MADV_DONTNEED, MADV_DONTFORK are supported. Other advice is ignored.", nil), + 29: syscalls.PartiallySupported("shmget", Shmget, "Option SHM_HUGETLB is not supported.", nil), + 30: syscalls.PartiallySupported("shmat", Shmat, "Option SHM_RND is not supported.", nil), + 31: syscalls.PartiallySupported("shmctl", Shmctl, "Options SHM_LOCK, SHM_UNLOCK are not supported.", nil), + 32: syscalls.Supported("dup", Dup), + 33: syscalls.Supported("dup2", Dup2), + 34: syscalls.Supported("pause", Pause), + 35: syscalls.Supported("nanosleep", Nanosleep), + 36: syscalls.Supported("getitimer", Getitimer), + 37: syscalls.Supported("alarm", Alarm), + 38: syscalls.Supported("setitimer", Setitimer), + 39: syscalls.Supported("getpid", Getpid), + 40: syscalls.Supported("sendfile", Sendfile), + 41: syscalls.PartiallySupported("socket", Socket, "Limited support for AF_NETLINK, NETLINK_ROUTE sockets. Limited support for SOCK_RAW.", nil), + 42: syscalls.Supported("connect", Connect), + 43: syscalls.Supported("accept", Accept), + 44: syscalls.Supported("sendto", SendTo), + 45: syscalls.Supported("recvfrom", RecvFrom), + 46: syscalls.Supported("sendmsg", SendMsg), + 47: syscalls.PartiallySupported("recvmsg", RecvMsg, "Not all flags and control messages are supported.", nil), + 48: syscalls.PartiallySupported("shutdown", Shutdown, "Not all flags and control messages are supported.", nil), + 49: syscalls.PartiallySupported("bind", Bind, "Autobind for abstract Unix sockets is not supported.", nil), + 50: syscalls.Supported("listen", Listen), + 51: syscalls.Supported("getsockname", GetSockName), + 52: syscalls.Supported("getpeername", GetPeerName), + 53: syscalls.Supported("socketpair", SocketPair), + 54: syscalls.PartiallySupported("setsockopt", SetSockOpt, "Not all socket options are supported.", nil), + 55: syscalls.PartiallySupported("getsockopt", GetSockOpt, "Not all socket options are supported.", nil), + 56: syscalls.PartiallySupported("clone", Clone, "Mount namespace (CLONE_NEWNS) not supported. Options CLONE_PARENT, CLONE_SYSVSEM not supported.", nil), + 57: syscalls.Supported("fork", Fork), + 58: syscalls.Supported("vfork", Vfork), + 59: syscalls.Supported("execve", Execve), + 60: syscalls.Supported("exit", Exit), + 61: syscalls.Supported("wait4", Wait4), + 62: syscalls.Supported("kill", Kill), + 63: syscalls.Supported("uname", Uname), + 64: syscalls.Supported("semget", Semget), + 65: syscalls.PartiallySupported("semop", Semop, "Option SEM_UNDO not supported.", nil), + 66: syscalls.PartiallySupported("semctl", Semctl, "Options IPC_INFO, SEM_INFO, IPC_STAT, SEM_STAT, SEM_STAT_ANY, GETNCNT, GETZCNT not supported.", nil), + 67: syscalls.Supported("shmdt", Shmdt), + 68: syscalls.ErrorWithEvent("msgget", syserror.ENOSYS, "", []string{"gvisor.dev/issue/135"}), // TODO(b/29354921) + 69: syscalls.ErrorWithEvent("msgsnd", syserror.ENOSYS, "", []string{"gvisor.dev/issue/135"}), // TODO(b/29354921) + 70: syscalls.ErrorWithEvent("msgrcv", syserror.ENOSYS, "", []string{"gvisor.dev/issue/135"}), // TODO(b/29354921) + 71: syscalls.ErrorWithEvent("msgctl", syserror.ENOSYS, "", []string{"gvisor.dev/issue/135"}), // TODO(b/29354921) + 72: syscalls.PartiallySupported("fcntl", Fcntl, "Not all options are supported.", nil), + 73: syscalls.PartiallySupported("flock", Flock, "Locks are held within the sandbox only.", nil), + 74: syscalls.PartiallySupported("fsync", Fsync, "Full data flush is not guaranteed at this time.", nil), + 75: syscalls.PartiallySupported("fdatasync", Fdatasync, "Full data flush is not guaranteed at this time.", nil), + 76: syscalls.Supported("truncate", Truncate), + 77: syscalls.Supported("ftruncate", Ftruncate), + 78: syscalls.Supported("getdents", Getdents), + 79: syscalls.Supported("getcwd", Getcwd), + 80: syscalls.Supported("chdir", Chdir), + 81: syscalls.Supported("fchdir", Fchdir), + 82: syscalls.Supported("rename", Rename), + 83: syscalls.Supported("mkdir", Mkdir), + 84: syscalls.Supported("rmdir", Rmdir), + 85: syscalls.Supported("creat", Creat), + 86: syscalls.Supported("link", Link), + 87: syscalls.Supported("unlink", Unlink), + 88: syscalls.Supported("symlink", Symlink), + 89: syscalls.Supported("readlink", Readlink), + 90: syscalls.Supported("chmod", Chmod), + 91: syscalls.PartiallySupported("fchmod", Fchmod, "Options S_ISUID and S_ISGID not supported.", nil), + 92: syscalls.Supported("chown", Chown), + 93: syscalls.Supported("fchown", Fchown), + 94: syscalls.Supported("lchown", Lchown), + 95: syscalls.Supported("umask", Umask), + 96: syscalls.Supported("gettimeofday", Gettimeofday), + 97: syscalls.Supported("getrlimit", Getrlimit), + 98: syscalls.PartiallySupported("getrusage", Getrusage, "Fields ru_maxrss, ru_minflt, ru_majflt, ru_inblock, ru_oublock are not supported. Fields ru_utime and ru_stime have low precision.", nil), + 99: syscalls.PartiallySupported("sysinfo", Sysinfo, "Fields loads, sharedram, bufferram, totalswap, freeswap, totalhigh, freehigh not supported.", nil), + 100: syscalls.Supported("times", Times), + 101: syscalls.PartiallySupported("ptrace", Ptrace, "Options PTRACE_PEEKSIGINFO, PTRACE_SECCOMP_GET_FILTER not supported.", nil), + 102: syscalls.Supported("getuid", Getuid), + 103: syscalls.PartiallySupported("syslog", Syslog, "Outputs a dummy message for security reasons.", nil), + 104: syscalls.Supported("getgid", Getgid), + 105: syscalls.Supported("setuid", Setuid), + 106: syscalls.Supported("setgid", Setgid), + 107: syscalls.Supported("geteuid", Geteuid), + 108: syscalls.Supported("getegid", Getegid), + 109: syscalls.Supported("setpgid", Setpgid), + 110: syscalls.Supported("getppid", Getppid), + 111: syscalls.Supported("getpgrp", Getpgrp), + 112: syscalls.Supported("setsid", Setsid), + 113: syscalls.Supported("setreuid", Setreuid), + 114: syscalls.Supported("setregid", Setregid), + 115: syscalls.Supported("getgroups", Getgroups), + 116: syscalls.Supported("setgroups", Setgroups), + 117: syscalls.Supported("setresuid", Setresuid), + 118: syscalls.Supported("getresuid", Getresuid), + 119: syscalls.Supported("setresgid", Setresgid), + 120: syscalls.Supported("getresgid", Getresgid), + 121: syscalls.Supported("getpgid", Getpgid), + 122: syscalls.ErrorWithEvent("setfsuid", syserror.ENOSYS, "", []string{"gvisor.dev/issue/260"}), // TODO(b/112851702) + 123: syscalls.ErrorWithEvent("setfsgid", syserror.ENOSYS, "", []string{"gvisor.dev/issue/260"}), // TODO(b/112851702) + 124: syscalls.Supported("getsid", Getsid), + 125: syscalls.Supported("capget", Capget), + 126: syscalls.Supported("capset", Capset), + 127: syscalls.Supported("rt_sigpending", RtSigpending), + 128: syscalls.Supported("rt_sigtimedwait", RtSigtimedwait), + 129: syscalls.Supported("rt_sigqueueinfo", RtSigqueueinfo), + 130: syscalls.Supported("rt_sigsuspend", RtSigsuspend), + 131: syscalls.Supported("sigaltstack", Sigaltstack), + 132: syscalls.Supported("utime", Utime), + 133: syscalls.PartiallySupported("mknod", Mknod, "Device creation is not generally supported. Only regular file and FIFO creation are supported.", nil), + 134: syscalls.Error("uselib", syserror.ENOSYS, "Obsolete", nil), + 135: syscalls.ErrorWithEvent("personality", syserror.EINVAL, "Unable to change personality.", nil), + 136: syscalls.ErrorWithEvent("ustat", syserror.ENOSYS, "Needs filesystem support.", nil), + 137: syscalls.PartiallySupported("statfs", Statfs, "Depends on the backing file system implementation.", nil), + 138: syscalls.PartiallySupported("fstatfs", Fstatfs, "Depends on the backing file system implementation.", nil), + 139: syscalls.ErrorWithEvent("sysfs", syserror.ENOSYS, "", []string{"gvisor.dev/issue/165"}), + 140: syscalls.PartiallySupported("getpriority", Getpriority, "Stub implementation.", nil), + 141: syscalls.PartiallySupported("setpriority", Setpriority, "Stub implementation.", nil), 142: syscalls.CapError("sched_setparam", linux.CAP_SYS_NICE, "", nil), - 143: syscalls.Undocumented("sched_getparam", SchedGetparam), - 144: syscalls.Undocumented("sched_setscheduler", SchedSetscheduler), - 145: syscalls.Undocumented("sched_getscheduler", SchedGetscheduler), - 146: syscalls.Undocumented("sched_get_priority_max", SchedGetPriorityMax), - 147: syscalls.Undocumented("sched_get_priority_min", SchedGetPriorityMin), - 148: syscalls.ErrorWithEvent("sched_rr_get_interval", syscall.EPERM, "", nil), - 149: syscalls.Undocumented("mlock", Mlock), - 150: syscalls.Undocumented("munlock", Munlock), - 151: syscalls.Undocumented("mlockall", Mlockall), - 152: syscalls.Undocumented("munlockall", Munlockall), + 143: syscalls.PartiallySupported("sched_getparam", SchedGetparam, "Stub implementation.", nil), + 144: syscalls.PartiallySupported("sched_setscheduler", SchedSetscheduler, "Stub implementation.", nil), + 145: syscalls.PartiallySupported("sched_getscheduler", SchedGetscheduler, "Stub implementation.", nil), + 146: syscalls.PartiallySupported("sched_get_priority_max", SchedGetPriorityMax, "Stub implementation.", nil), + 147: syscalls.PartiallySupported("sched_get_priority_min", SchedGetPriorityMin, "Stub implementation.", nil), + 148: syscalls.ErrorWithEvent("sched_rr_get_interval", syserror.EPERM, "", nil), + 149: syscalls.PartiallySupported("mlock", Mlock, "Stub implementation. The sandbox lacks appropriate permissions.", nil), + 150: syscalls.PartiallySupported("munlock", Munlock, "Stub implementation. The sandbox lacks appropriate permissions.", nil), + 151: syscalls.PartiallySupported("mlockall", Mlockall, "Stub implementation. The sandbox lacks appropriate permissions.", nil), + 152: syscalls.PartiallySupported("munlockall", Munlockall, "Stub implementation. The sandbox lacks appropriate permissions.", nil), 153: syscalls.CapError("vhangup", linux.CAP_SYS_TTY_CONFIG, "", nil), - 154: syscalls.Error("modify_ldt", syscall.EPERM, "", nil), - 155: syscalls.Error("pivot_root", syscall.EPERM, "", nil), - 156: syscalls.Error("sysctl", syscall.EPERM, `syscall is "worthless"`, nil), - 157: syscalls.Undocumented("prctl", Prctl), - 158: syscalls.Undocumented("arch_prctl", ArchPrctl), + 154: syscalls.Error("modify_ldt", syserror.EPERM, "", nil), + 155: syscalls.Error("pivot_root", syserror.EPERM, "", nil), + 156: syscalls.Error("sysctl", syserror.EPERM, "Deprecated. Use /proc/sys instead.", nil), + 157: syscalls.PartiallySupported("prctl", Prctl, "Not all options are supported.", nil), + 158: syscalls.PartiallySupported("arch_prctl", ArchPrctl, "Options ARCH_GET_GS, ARCH_SET_GS not supported.", nil), 159: syscalls.CapError("adjtimex", linux.CAP_SYS_TIME, "", nil), - 160: syscalls.Undocumented("setrlimit", Setrlimit), - 161: syscalls.Undocumented("chroot", Chroot), - 162: syscalls.Undocumented("sync", Sync), + 160: syscalls.PartiallySupported("setrlimit", Setrlimit, "Not all rlimits are enforced.", nil), + 161: syscalls.Supported("chroot", Chroot), + 162: syscalls.PartiallySupported("sync", Sync, "Full data flush is not guaranteed at this time.", nil), 163: syscalls.CapError("acct", linux.CAP_SYS_PACCT, "", nil), 164: syscalls.CapError("settimeofday", linux.CAP_SYS_TIME, "", nil), - 165: syscalls.Undocumented("mount", Mount), - 166: syscalls.Undocumented("umount2", Umount2), + 165: syscalls.PartiallySupported("mount", Mount, "Not all options or file systems are supported.", nil), + 166: syscalls.PartiallySupported("umount2", Umount2, "Not all options or file systems are supported.", nil), 167: syscalls.CapError("swapon", linux.CAP_SYS_ADMIN, "", nil), 168: syscalls.CapError("swapoff", linux.CAP_SYS_ADMIN, "", nil), 169: syscalls.CapError("reboot", linux.CAP_SYS_BOOT, "", nil), - 170: syscalls.Undocumented("sethostname", Sethostname), - 171: syscalls.Undocumented("setdomainname", Setdomainname), + 170: syscalls.Supported("sethostname", Sethostname), + 171: syscalls.Supported("setdomainname", Setdomainname), 172: syscalls.CapError("iopl", linux.CAP_SYS_RAWIO, "", nil), 173: syscalls.CapError("ioperm", linux.CAP_SYS_RAWIO, "", nil), 174: syscalls.CapError("create_module", linux.CAP_SYS_MODULE, "", nil), 175: syscalls.CapError("init_module", linux.CAP_SYS_MODULE, "", nil), 176: syscalls.CapError("delete_module", linux.CAP_SYS_MODULE, "", nil), - 177: syscalls.Error("get_kernel_syms", syscall.ENOSYS, "Not supported in > 2.6", nil), - 178: syscalls.Error("query_module", syscall.ENOSYS, "Not supported in > 2.6", nil), + 177: syscalls.Error("get_kernel_syms", syserror.ENOSYS, "Not supported in Linux > 2.6.", nil), + 178: syscalls.Error("query_module", syserror.ENOSYS, "Not supported in Linux > 2.6.", nil), 179: syscalls.CapError("quotactl", linux.CAP_SYS_ADMIN, "", nil), // requires cap_sys_admin for most operations - 180: syscalls.Error("nfsservctl", syscall.ENOSYS, "Does not exist > 3.1", nil), - 181: syscalls.Error("getpmsg", syscall.ENOSYS, "Not implemented in Linux", nil), - 182: syscalls.Error("putpmsg", syscall.ENOSYS, "Not implemented in Linux", nil), - 183: syscalls.Error("afs_syscall", syscall.ENOSYS, "Not implemented in Linux", nil), - 184: syscalls.Error("tuxcall", syscall.ENOSYS, "Not implemented in Linux", nil), - 185: syscalls.Error("security", syscall.ENOSYS, "Not implemented in Linux", nil), - 186: syscalls.Undocumented("gettid", Gettid), - 187: syscalls.ErrorWithEvent("readahead", syscall.ENOSYS, "", []string{"gvisor.dev/issue/261"}), // TODO(b/29351341) - 188: syscalls.ErrorWithEvent("setxattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 189: syscalls.ErrorWithEvent("lsetxattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 190: syscalls.ErrorWithEvent("fsetxattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 191: syscalls.ErrorWithEvent("getxattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 192: syscalls.ErrorWithEvent("lgetxattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 193: syscalls.ErrorWithEvent("fgetxattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 194: syscalls.ErrorWithEvent("listxattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 195: syscalls.ErrorWithEvent("llistxattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 196: syscalls.ErrorWithEvent("flistxattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 197: syscalls.ErrorWithEvent("removexattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 198: syscalls.ErrorWithEvent("lremovexattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 199: syscalls.ErrorWithEvent("fremovexattr", syscall.ENOTSUP, "Requires filesystem support", nil), - 200: syscalls.Undocumented("tkill", Tkill), - 201: syscalls.Undocumented("time", Time), - 202: syscalls.Undocumented("futex", Futex), - 203: syscalls.Undocumented("sched_setaffinity", SchedSetaffinity), - 204: syscalls.Undocumented("sched_getaffinity", SchedGetaffinity), - 205: syscalls.Error("set_thread_area", syscall.ENOSYS, "Expected to return ENOSYS on 64-bit", nil), - 206: syscalls.Undocumented("io_setup", IoSetup), - 207: syscalls.Undocumented("io_destroy", IoDestroy), - 208: syscalls.Undocumented("io_getevents", IoGetevents), - 209: syscalls.Undocumented("io_submit", IoSubmit), - 210: syscalls.Undocumented("io_cancel", IoCancel), - 211: syscalls.Error("get_thread_area", syscall.ENOSYS, "Expected to return ENOSYS on 64-bit", nil), + 180: syscalls.Error("nfsservctl", syserror.ENOSYS, "Removed after Linux 3.1.", nil), + 181: syscalls.Error("getpmsg", syserror.ENOSYS, "Not implemented in Linux.", nil), + 182: syscalls.Error("putpmsg", syserror.ENOSYS, "Not implemented in Linux.", nil), + 183: syscalls.Error("afs_syscall", syserror.ENOSYS, "Not implemented in Linux.", nil), + 184: syscalls.Error("tuxcall", syserror.ENOSYS, "Not implemented in Linux.", nil), + 185: syscalls.Error("security", syserror.ENOSYS, "Not implemented in Linux.", nil), + 186: syscalls.Supported("gettid", Gettid), + 187: syscalls.ErrorWithEvent("readahead", syserror.ENOSYS, "", []string{"gvisor.dev/issue/261"}), // TODO(b/29351341) + 188: syscalls.Error("setxattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 189: syscalls.Error("lsetxattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 190: syscalls.Error("fsetxattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 191: syscalls.ErrorWithEvent("getxattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 192: syscalls.ErrorWithEvent("lgetxattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 193: syscalls.ErrorWithEvent("fgetxattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 194: syscalls.ErrorWithEvent("listxattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 195: syscalls.ErrorWithEvent("llistxattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 196: syscalls.ErrorWithEvent("flistxattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 197: syscalls.ErrorWithEvent("removexattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 198: syscalls.ErrorWithEvent("lremovexattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 199: syscalls.ErrorWithEvent("fremovexattr", syserror.ENOTSUP, "Requires filesystem support.", nil), + 200: syscalls.Supported("tkill", Tkill), + 201: syscalls.Supported("time", Time), + 202: syscalls.PartiallySupported("futex", Futex, "Robust futexes not supported.", nil), + 203: syscalls.PartiallySupported("sched_setaffinity", SchedSetaffinity, "Stub implementation.", nil), + 204: syscalls.PartiallySupported("sched_getaffinity", SchedGetaffinity, "Stub implementation.", nil), + 205: syscalls.Error("set_thread_area", syserror.ENOSYS, "Expected to return ENOSYS on 64-bit", nil), + 206: syscalls.PartiallySupported("io_setup", IoSetup, "Generally supported with exceptions. User ring optimizations are not implemented.", []string{"gvisor.dev/issue/204"}), + 207: syscalls.PartiallySupported("io_destroy", IoDestroy, "Generally supported with exceptions. User ring optimizations are not implemented.", []string{"gvisor.dev/issue/204"}), + 208: syscalls.PartiallySupported("io_getevents", IoGetevents, "Generally supported with exceptions. User ring optimizations are not implemented.", []string{"gvisor.dev/issue/204"}), + 209: syscalls.PartiallySupported("io_submit", IoSubmit, "Generally supported with exceptions. User ring optimizations are not implemented.", []string{"gvisor.dev/issue/204"}), + 210: syscalls.PartiallySupported("io_cancel", IoCancel, "Generally supported with exceptions. User ring optimizations are not implemented.", []string{"gvisor.dev/issue/204"}), + 211: syscalls.Error("get_thread_area", syserror.ENOSYS, "Expected to return ENOSYS on 64-bit", nil), 212: syscalls.CapError("lookup_dcookie", linux.CAP_SYS_ADMIN, "", nil), - 213: syscalls.Undocumented("epoll_create", EpollCreate), - 214: syscalls.ErrorWithEvent("epoll_ctl_old", syscall.ENOSYS, "Deprecated", nil), - 215: syscalls.ErrorWithEvent("epoll_wait_old", syscall.ENOSYS, "Deprecated", nil), - 216: syscalls.ErrorWithEvent("remap_file_pages", syscall.ENOSYS, "Deprecated since 3.16", nil), - 217: syscalls.Undocumented("getdents64", Getdents64), - 218: syscalls.Undocumented("set_tid_address", SetTidAddress), - 219: syscalls.Undocumented("restart_syscall", RestartSyscall), - 220: syscalls.ErrorWithEvent("semtimedop", syscall.ENOSYS, "", []string{"gvisor.dev/issue/137"}), // TODO(b/29354920) - 221: syscalls.Undocumented("fadvise64", Fadvise64), - 222: syscalls.Undocumented("timer_create", TimerCreate), - 223: syscalls.Undocumented("timer_settime", TimerSettime), - 224: syscalls.Undocumented("timer_gettime", TimerGettime), - 225: syscalls.Undocumented("timer_getoverrun", TimerGetoverrun), - 226: syscalls.Undocumented("timer_delete", TimerDelete), - 227: syscalls.Undocumented("clock_settime", ClockSettime), - 228: syscalls.Undocumented("clock_gettime", ClockGettime), - 229: syscalls.Undocumented("clock_getres", ClockGetres), - 230: syscalls.Undocumented("clock_nanosleep", ClockNanosleep), - 231: syscalls.Undocumented("exit_group", ExitGroup), - 232: syscalls.Undocumented("epoll_wait", EpollWait), - 233: syscalls.Undocumented("epoll_ctl", EpollCtl), - 234: syscalls.Undocumented("tgkill", Tgkill), - 235: syscalls.Undocumented("utimes", Utimes), - 236: syscalls.Error("vserver", syscall.ENOSYS, "Not implemented by Linux", nil), + 213: syscalls.Supported("epoll_create", EpollCreate), + 214: syscalls.ErrorWithEvent("epoll_ctl_old", syserror.ENOSYS, "Deprecated.", nil), + 215: syscalls.ErrorWithEvent("epoll_wait_old", syserror.ENOSYS, "Deprecated.", nil), + 216: syscalls.ErrorWithEvent("remap_file_pages", syserror.ENOSYS, "Deprecated since Linux 3.16.", nil), + 217: syscalls.Supported("getdents64", Getdents64), + 218: syscalls.Supported("set_tid_address", SetTidAddress), + 219: syscalls.Supported("restart_syscall", RestartSyscall), + 220: syscalls.ErrorWithEvent("semtimedop", syserror.ENOSYS, "", []string{"gvisor.dev/issue/137"}), // TODO(b/29354920) + 221: syscalls.PartiallySupported("fadvise64", Fadvise64, "Not all options are supported.", nil), + 222: syscalls.Supported("timer_create", TimerCreate), + 223: syscalls.Supported("timer_settime", TimerSettime), + 224: syscalls.Supported("timer_gettime", TimerGettime), + 225: syscalls.Supported("timer_getoverrun", TimerGetoverrun), + 226: syscalls.Supported("timer_delete", TimerDelete), + 227: syscalls.Supported("clock_settime", ClockSettime), + 228: syscalls.Supported("clock_gettime", ClockGettime), + 229: syscalls.Supported("clock_getres", ClockGetres), + 230: syscalls.Supported("clock_nanosleep", ClockNanosleep), + 231: syscalls.Supported("exit_group", ExitGroup), + 232: syscalls.Supported("epoll_wait", EpollWait), + 233: syscalls.Supported("epoll_ctl", EpollCtl), + 234: syscalls.Supported("tgkill", Tgkill), + 235: syscalls.Supported("utimes", Utimes), + 236: syscalls.Error("vserver", syserror.ENOSYS, "Not implemented by Linux", nil), 237: syscalls.PartiallySupported("mbind", Mbind, "Stub implementation. Only a single NUMA node is advertised, and mempolicy is ignored accordingly, but mbind() will succeed and has effects reflected by get_mempolicy.", []string{"gvisor.dev/issue/262"}), - 238: syscalls.Undocumented("set_mempolicy", SetMempolicy), - 239: syscalls.Undocumented("get_mempolicy", GetMempolicy), - 240: syscalls.ErrorWithEvent("mq_open", syscall.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) - 241: syscalls.ErrorWithEvent("mq_unlink", syscall.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) - 242: syscalls.ErrorWithEvent("mq_timedsend", syscall.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) - 243: syscalls.ErrorWithEvent("mq_timedreceive", syscall.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) - 244: syscalls.ErrorWithEvent("mq_notify", syscall.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) - 245: syscalls.ErrorWithEvent("mq_getsetattr", syscall.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) + 238: syscalls.PartiallySupported("set_mempolicy", SetMempolicy, "Stub implementation.", nil), + 239: syscalls.PartiallySupported("get_mempolicy", GetMempolicy, "Stub implementation.", nil), + 240: syscalls.ErrorWithEvent("mq_open", syserror.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) + 241: syscalls.ErrorWithEvent("mq_unlink", syserror.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) + 242: syscalls.ErrorWithEvent("mq_timedsend", syserror.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) + 243: syscalls.ErrorWithEvent("mq_timedreceive", syserror.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) + 244: syscalls.ErrorWithEvent("mq_notify", syserror.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) + 245: syscalls.ErrorWithEvent("mq_getsetattr", syserror.ENOSYS, "", []string{"gvisor.dev/issue/136"}), // TODO(b/29354921) 246: syscalls.CapError("kexec_load", linux.CAP_SYS_BOOT, "", nil), - 247: syscalls.Undocumented("waitid", Waitid), - 248: syscalls.Error("add_key", syscall.EACCES, "Not available to user", nil), - 249: syscalls.Error("request_key", syscall.EACCES, "Not available to user", nil), - 250: syscalls.Error("keyctl", syscall.EACCES, "Not available to user", nil), + 247: syscalls.Supported("waitid", Waitid), + 248: syscalls.Error("add_key", syserror.EACCES, "Not available to user.", nil), + 249: syscalls.Error("request_key", syserror.EACCES, "Not available to user.", nil), + 250: syscalls.Error("keyctl", syserror.EACCES, "Not available to user.", nil), 251: syscalls.CapError("ioprio_set", linux.CAP_SYS_ADMIN, "", nil), // requires cap_sys_nice or cap_sys_admin (depending) 252: syscalls.CapError("ioprio_get", linux.CAP_SYS_ADMIN, "", nil), // requires cap_sys_nice or cap_sys_admin (depending) - 253: syscalls.Undocumented("inotify_init", InotifyInit), - 254: syscalls.Undocumented("inotify_add_watch", InotifyAddWatch), - 255: syscalls.Undocumented("inotify_rm_watch", InotifyRmWatch), + 253: syscalls.PartiallySupported("inotify_init", InotifyInit, "inotify events are only available inside the sandbox.", nil), + 254: syscalls.PartiallySupported("inotify_add_watch", InotifyAddWatch, "inotify events are only available inside the sandbox.", nil), + 255: syscalls.PartiallySupported("inotify_rm_watch", InotifyRmWatch, "inotify events are only available inside the sandbox.", nil), 256: syscalls.CapError("migrate_pages", linux.CAP_SYS_NICE, "", nil), - 257: syscalls.Undocumented("openat", Openat), - 258: syscalls.Undocumented("mkdirat", Mkdirat), - 259: syscalls.Undocumented("mknodat", Mknodat), - 260: syscalls.Undocumented("fchownat", Fchownat), - 261: syscalls.Undocumented("futimesat", Futimesat), - 262: syscalls.Undocumented("fstatat", Fstatat), - 263: syscalls.Undocumented("unlinkat", Unlinkat), - 264: syscalls.Undocumented("renameat", Renameat), - 265: syscalls.Undocumented("linkat", Linkat), - 266: syscalls.Undocumented("symlinkat", Symlinkat), - 267: syscalls.Undocumented("readlinkat", Readlinkat), - 268: syscalls.Undocumented("fchmodat", Fchmodat), - 269: syscalls.Undocumented("faccessat", Faccessat), - 270: syscalls.Undocumented("pselect", Pselect), - 271: syscalls.Undocumented("ppoll", Ppoll), - 272: syscalls.Undocumented("unshare", Unshare), - 273: syscalls.Error("set_robust_list", syscall.ENOSYS, "Obsolete", nil), - 274: syscalls.Error("get_robust_list", syscall.ENOSYS, "Obsolete", nil), - 275: syscalls.PartiallySupported("splice", Splice, "Stub implementation", []string{"gvisor.dev/issue/138"}), // TODO(b/29354098) - 276: syscalls.ErrorWithEvent("tee", syscall.ENOSYS, "", []string{"gvisor.dev/issue/138"}), // TODO(b/29354098) - 277: syscalls.Undocumented("sync_file_range", SyncFileRange), - 278: syscalls.ErrorWithEvent("vmsplice", syscall.ENOSYS, "", []string{"gvisor.dev/issue/138"}), // TODO(b/29354098) - 279: syscalls.CapError("move_pages", linux.CAP_SYS_NICE, "", nil), // requires cap_sys_nice (mostly) - 280: syscalls.Undocumented("utimensat", Utimensat), - 281: syscalls.Undocumented("epoll_pwait", EpollPwait), - 282: syscalls.ErrorWithEvent("signalfd", syscall.ENOSYS, "", []string{"gvisor.dev/issue/139"}), // TODO(b/19846426) - 283: syscalls.Undocumented("timerfd_create", TimerfdCreate), - 284: syscalls.Undocumented("eventfd", Eventfd), - 285: syscalls.Undocumented("fallocate", Fallocate), - 286: syscalls.Undocumented("timerfd_settime", TimerfdSettime), - 287: syscalls.Undocumented("timerfd_gettime", TimerfdGettime), - 288: syscalls.Undocumented("accept4", Accept4), - 289: syscalls.ErrorWithEvent("signalfd4", syscall.ENOSYS, "", []string{"gvisor.dev/issue/139"}), // TODO(b/19846426) - 290: syscalls.Undocumented("eventfd2", Eventfd2), - 291: syscalls.Undocumented("epoll_create1", EpollCreate1), - 292: syscalls.Undocumented("dup3", Dup3), - 293: syscalls.Undocumented("pipe2", Pipe2), - 294: syscalls.Undocumented("inotify_init1", InotifyInit1), - 295: syscalls.Undocumented("preadv", Preadv), - 296: syscalls.Undocumented("pwritev", Pwritev), - 297: syscalls.Undocumented("rt_tgsigqueueinfo", RtTgsigqueueinfo), - 298: syscalls.ErrorWithEvent("perf_event_open", syscall.ENODEV, "No support for perf counters", nil), - 299: syscalls.Undocumented("recvmmsg", RecvMMsg), - 300: syscalls.ErrorWithEvent("fanotify_init", syscall.ENOSYS, "Needs CONFIG_FANOTIFY", nil), - 301: syscalls.ErrorWithEvent("fanotify_mark", syscall.ENOSYS, "Needs CONFIG_FANOTIFY", nil), - 302: syscalls.Undocumented("prlimit64", Prlimit64), - 303: syscalls.ErrorWithEvent("name_to_handle_at", syscall.EOPNOTSUPP, "Needs filesystem support", nil), - 304: syscalls.ErrorWithEvent("open_by_handle_at", syscall.EOPNOTSUPP, "Needs filesystem support", nil), + 257: syscalls.Supported("openat", Openat), + 258: syscalls.Supported("mkdirat", Mkdirat), + 259: syscalls.Supported("mknodat", Mknodat), + 260: syscalls.Supported("fchownat", Fchownat), + 261: syscalls.Supported("futimesat", Futimesat), + 262: syscalls.Supported("fstatat", Fstatat), + 263: syscalls.Supported("unlinkat", Unlinkat), + 264: syscalls.Supported("renameat", Renameat), + 265: syscalls.Supported("linkat", Linkat), + 266: syscalls.Supported("symlinkat", Symlinkat), + 267: syscalls.Supported("readlinkat", Readlinkat), + 268: syscalls.Supported("fchmodat", Fchmodat), + 269: syscalls.Supported("faccessat", Faccessat), + 270: syscalls.Supported("pselect", Pselect), + 271: syscalls.Supported("ppoll", Ppoll), + 272: syscalls.PartiallySupported("unshare", Unshare, "Mount, cgroup namespaces not supported. Network namespaces supported but must be empty.", nil), + 273: syscalls.Error("set_robust_list", syserror.ENOSYS, "Obsolete.", nil), + 274: syscalls.Error("get_robust_list", syserror.ENOSYS, "Obsolete.", nil), + 275: syscalls.PartiallySupported("splice", Splice, "Stub implementation.", []string{"gvisor.dev/issue/138"}), // TODO(b/29354098) + 276: syscalls.ErrorWithEvent("tee", syserror.ENOSYS, "", []string{"gvisor.dev/issue/138"}), // TODO(b/29354098) + 277: syscalls.PartiallySupported("sync_file_range", SyncFileRange, "Full data flush is not guaranteed at this time.", nil), + 278: syscalls.ErrorWithEvent("vmsplice", syserror.ENOSYS, "", []string{"gvisor.dev/issue/138"}), // TODO(b/29354098) + 279: syscalls.CapError("move_pages", linux.CAP_SYS_NICE, "", nil), // requires cap_sys_nice (mostly) + 280: syscalls.Supported("utimensat", Utimensat), + 281: syscalls.Supported("epoll_pwait", EpollPwait), + 282: syscalls.ErrorWithEvent("signalfd", syserror.ENOSYS, "", []string{"gvisor.dev/issue/139"}), // TODO(b/19846426) + 283: syscalls.Supported("timerfd_create", TimerfdCreate), + 284: syscalls.Supported("eventfd", Eventfd), + 285: syscalls.PartiallySupported("fallocate", Fallocate, "Not all options are supported.", nil), + 286: syscalls.Supported("timerfd_settime", TimerfdSettime), + 287: syscalls.Supported("timerfd_gettime", TimerfdGettime), + 288: syscalls.Supported("accept4", Accept4), + 289: syscalls.ErrorWithEvent("signalfd4", syserror.ENOSYS, "", []string{"gvisor.dev/issue/139"}), // TODO(b/19846426) + 290: syscalls.Supported("eventfd2", Eventfd2), + 291: syscalls.Supported("epoll_create1", EpollCreate1), + 292: syscalls.Supported("dup3", Dup3), + 293: syscalls.Supported("pipe2", Pipe2), + 294: syscalls.Supported("inotify_init1", InotifyInit1), + 295: syscalls.Supported("preadv", Preadv), + 296: syscalls.Supported("pwritev", Pwritev), + 297: syscalls.Supported("rt_tgsigqueueinfo", RtTgsigqueueinfo), + 298: syscalls.ErrorWithEvent("perf_event_open", syserror.ENODEV, "No support for perf counters", nil), + 299: syscalls.PartiallySupported("recvmmsg", RecvMMsg, "Not all flags and control messages are supported.", nil), + 300: syscalls.ErrorWithEvent("fanotify_init", syserror.ENOSYS, "Needs CONFIG_FANOTIFY", nil), + 301: syscalls.ErrorWithEvent("fanotify_mark", syserror.ENOSYS, "Needs CONFIG_FANOTIFY", nil), + 302: syscalls.Supported("prlimit64", Prlimit64), + 303: syscalls.Error("name_to_handle_at", syserror.EOPNOTSUPP, "Not supported by gVisor filesystems", nil), + 304: syscalls.Error("open_by_handle_at", syserror.EOPNOTSUPP, "Not supported by gVisor filesystems", nil), 305: syscalls.CapError("clock_adjtime", linux.CAP_SYS_TIME, "", nil), - 306: syscalls.Undocumented("syncfs", Syncfs), - 307: syscalls.Undocumented("sendmmsg", SendMMsg), - 308: syscalls.ErrorWithEvent("setns", syscall.EOPNOTSUPP, "Needs filesystem support", []string{"gvisor.dev/issue/140"}), // TODO(b/29354995) - 309: syscalls.Undocumented("getcpu", Getcpu), - 310: syscalls.ErrorWithEvent("process_vm_readv", syscall.ENOSYS, "", []string{"gvisor.dev/issue/158"}), - 311: syscalls.ErrorWithEvent("process_vm_writev", syscall.ENOSYS, "", []string{"gvisor.dev/issue/158"}), + 306: syscalls.PartiallySupported("syncfs", Syncfs, "Depends on backing file system.", nil), + 307: syscalls.PartiallySupported("sendmmsg", SendMMsg, "Not all flags and control messages are supported.", nil), + 308: syscalls.ErrorWithEvent("setns", syserror.EOPNOTSUPP, "Needs filesystem support", []string{"gvisor.dev/issue/140"}), // TODO(b/29354995) + 309: syscalls.Supported("getcpu", Getcpu), + 310: syscalls.ErrorWithEvent("process_vm_readv", syserror.ENOSYS, "", []string{"gvisor.dev/issue/158"}), + 311: syscalls.ErrorWithEvent("process_vm_writev", syserror.ENOSYS, "", []string{"gvisor.dev/issue/158"}), 312: syscalls.CapError("kcmp", linux.CAP_SYS_PTRACE, "", nil), 313: syscalls.CapError("finit_module", linux.CAP_SYS_MODULE, "", nil), - 314: syscalls.ErrorWithEvent("sched_setattr", syscall.ENOSYS, "gVisor does not implement a scheduler.", []string{"gvisor.dev/issue/264"}), // TODO(b/118902272) - 315: syscalls.ErrorWithEvent("sched_getattr", syscall.ENOSYS, "gVisor does not implement a scheduler.", []string{"gvisor.dev/issue/264"}), // TODO(b/118902272) - 316: syscalls.ErrorWithEvent("renameat2", syscall.ENOSYS, "", []string{"gvisor.dev/issue/263"}), // TODO(b/118902772) - 317: syscalls.Undocumented("seccomp", Seccomp), - 318: syscalls.Undocumented("getrandom", GetRandom), - 319: syscalls.Undocumented("memfd_create", MemfdCreate), + 314: syscalls.ErrorWithEvent("sched_setattr", syserror.ENOSYS, "gVisor does not implement a scheduler.", []string{"gvisor.dev/issue/264"}), // TODO(b/118902272) + 315: syscalls.ErrorWithEvent("sched_getattr", syserror.ENOSYS, "gVisor does not implement a scheduler.", []string{"gvisor.dev/issue/264"}), // TODO(b/118902272) + 316: syscalls.ErrorWithEvent("renameat2", syserror.ENOSYS, "", []string{"gvisor.dev/issue/263"}), // TODO(b/118902772) + 317: syscalls.Supported("seccomp", Seccomp), + 318: syscalls.Supported("getrandom", GetRandom), + 319: syscalls.Supported("memfd_create", MemfdCreate), 320: syscalls.CapError("kexec_file_load", linux.CAP_SYS_BOOT, "", nil), 321: syscalls.CapError("bpf", linux.CAP_SYS_ADMIN, "", nil), - 322: syscalls.ErrorWithEvent("execveat", syscall.ENOSYS, "", []string{"gvisor.dev/issue/265"}), // TODO(b/118901836) - 323: syscalls.ErrorWithEvent("userfaultfd", syscall.ENOSYS, "", []string{"gvisor.dev/issue/266"}), // TODO(b/118906345) - 324: syscalls.ErrorWithEvent("membarrier", syscall.ENOSYS, "", []string{"gvisor.dev/issue/267"}), // TODO(b/118904897) - 325: syscalls.Undocumented("mlock2", Mlock2), + 322: syscalls.ErrorWithEvent("execveat", syserror.ENOSYS, "", []string{"gvisor.dev/issue/265"}), // TODO(b/118901836) + 323: syscalls.ErrorWithEvent("userfaultfd", syserror.ENOSYS, "", []string{"gvisor.dev/issue/266"}), // TODO(b/118906345) + 324: syscalls.ErrorWithEvent("membarrier", syserror.ENOSYS, "", []string{"gvisor.dev/issue/267"}), // TODO(b/118904897) + 325: syscalls.PartiallySupported("mlock2", Mlock2, "Stub implementation. The sandbox lacks appropriate permissions.", nil), // Syscalls after 325 are "backports" from versions of Linux after 4.4. - 326: syscalls.ErrorWithEvent("copy_file_range", syscall.ENOSYS, "", nil), - 327: syscalls.Undocumented("preadv2", Preadv2), - 328: syscalls.Undocumented("pwritev2", Pwritev2), + 326: syscalls.ErrorWithEvent("copy_file_range", syserror.ENOSYS, "", nil), + 327: syscalls.Supported("preadv2", Preadv2), + 328: syscalls.PartiallySupported("pwritev2", Pwritev2, "Flag RWF_HIPRI is not supported.", nil), + 332: syscalls.Supported("statx", Statx), }, Emulate: map[usermem.Addr]uintptr{ diff --git a/pkg/sentry/syscalls/linux/sigset.go b/pkg/sentry/syscalls/linux/sigset.go index 5438b664b..333013d8c 100644 --- a/pkg/sentry/syscalls/linux/sigset.go +++ b/pkg/sentry/syscalls/linux/sigset.go @@ -15,19 +15,17 @@ package linux import ( - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // copyInSigSet copies in a sigset_t, checks its size, and ensures that KILL and // STOP are clear. func copyInSigSet(t *kernel.Task, sigSetAddr usermem.Addr, size uint) (linux.SignalSet, error) { if size != linux.SignalSetSize { - return 0, syscall.EINVAL + return 0, syserror.EINVAL } b := t.CopyScratchBuffer(8) if _, err := t.CopyInBytes(sigSetAddr, b); err != nil { diff --git a/pkg/sentry/syscalls/linux/sys_aio.go b/pkg/sentry/syscalls/linux/sys_aio.go index 1b27b2415..f56411bfe 100644 --- a/pkg/sentry/syscalls/linux/sys_aio.go +++ b/pkg/sentry/syscalls/linux/sys_aio.go @@ -17,15 +17,14 @@ package linux import ( "encoding/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/eventfd" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/eventfd" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // I/O commands. @@ -55,7 +54,7 @@ type ioCallback struct { OpCode uint16 ReqPrio int16 - FD uint32 + FD int32 Buf uint64 Bytes uint64 @@ -65,7 +64,7 @@ type ioCallback struct { Flags uint32 // eventfd to signal if IOCB_FLAG_RESFD is set in flags. - ResFD uint32 + ResFD int32 } // ioEvent describes an I/O result. @@ -292,7 +291,7 @@ func performCallback(t *kernel.Task, file *fs.File, cbAddr usermem.Addr, cb *ioC // submitCallback processes a single callback. func submitCallback(t *kernel.Task, id uint64, cb *ioCallback, cbAddr usermem.Addr) error { - file := t.FDMap().GetFile(kdefs.FD(cb.FD)) + file := t.GetFile(cb.FD) if file == nil { // File not found. return syserror.EBADF @@ -302,7 +301,7 @@ func submitCallback(t *kernel.Task, id uint64, cb *ioCallback, cbAddr usermem.Ad // Was there an eventFD? Extract it. var eventFile *fs.File if cb.Flags&_IOCB_FLAG_RESFD != 0 { - eventFile = t.FDMap().GetFile(kdefs.FD(cb.ResFD)) + eventFile = t.GetFile(cb.ResFD) if eventFile == nil { // Bad FD. return syserror.EBADF diff --git a/pkg/sentry/syscalls/linux/sys_capability.go b/pkg/sentry/syscalls/linux/sys_capability.go index 622cb8d0d..adf5ea5f2 100644 --- a/pkg/sentry/syscalls/linux/sys_capability.go +++ b/pkg/sentry/syscalls/linux/sys_capability.go @@ -15,11 +15,11 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/syserror" ) func lookupCaps(t *kernel.Task, tid kernel.ThreadID) (permitted, inheritable, effective auth.CapabilitySet, err error) { diff --git a/pkg/sentry/syscalls/linux/sys_epoll.go b/pkg/sentry/syscalls/linux/sys_epoll.go index 1467feb4e..4a2b9f061 100644 --- a/pkg/sentry/syscalls/linux/sys_epoll.go +++ b/pkg/sentry/syscalls/linux/sys_epoll.go @@ -15,26 +15,24 @@ package linux import ( - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/epoll" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/syscalls" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/epoll" + "gvisor.dev/gvisor/pkg/sentry/syscalls" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // EpollCreate1 implements the epoll_create1(2) linux syscall. func EpollCreate1(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { flags := args[0].Int() - if flags & ^syscall.EPOLL_CLOEXEC != 0 { + if flags & ^linux.EPOLL_CLOEXEC != 0 { return 0, nil, syserror.EINVAL } - closeOnExec := flags&syscall.EPOLL_CLOEXEC != 0 + closeOnExec := flags&linux.EPOLL_CLOEXEC != 0 fd, err := syscalls.CreateEpoll(t, closeOnExec) if err != nil { return 0, nil, err @@ -61,46 +59,43 @@ func EpollCreate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S // EpollCtl implements the epoll_ctl(2) linux syscall. func EpollCtl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - epfd := kdefs.FD(args[0].Int()) + epfd := args[0].Int() op := args[1].Int() - fd := kdefs.FD(args[2].Int()) + fd := args[2].Int() eventAddr := args[3].Pointer() // Capture the event state if needed. flags := epoll.EntryFlags(0) mask := waiter.EventMask(0) var data [2]int32 - if op != syscall.EPOLL_CTL_DEL { - var e syscall.EpollEvent + if op != linux.EPOLL_CTL_DEL { + var e linux.EpollEvent if _, err := t.CopyIn(eventAddr, &e); err != nil { return 0, nil, err } - if e.Events&syscall.EPOLLONESHOT != 0 { + if e.Events&linux.EPOLLONESHOT != 0 { flags |= epoll.OneShot } - // syscall.EPOLLET is incorrectly generated as a negative number - // in Go, see https://github.com/golang/go/issues/5328 for - // details. - if e.Events&-syscall.EPOLLET != 0 { + if e.Events&linux.EPOLLET != 0 { flags |= epoll.EdgeTriggered } mask = waiter.EventMaskFromLinux(e.Events) data[0] = e.Fd - data[1] = e.Pad + data[1] = e.Data } // Perform the requested operations. switch op { - case syscall.EPOLL_CTL_ADD: + case linux.EPOLL_CTL_ADD: // See fs/eventpoll.c. mask |= waiter.EventHUp | waiter.EventErr return 0, nil, syscalls.AddEpoll(t, epfd, fd, flags, mask, data) - case syscall.EPOLL_CTL_DEL: + case linux.EPOLL_CTL_DEL: return 0, nil, syscalls.RemoveEpoll(t, epfd, fd) - case syscall.EPOLL_CTL_MOD: + case linux.EPOLL_CTL_MOD: // Same as EPOLL_CTL_ADD. mask |= waiter.EventHUp | waiter.EventErr return 0, nil, syscalls.UpdateEpoll(t, epfd, fd, flags, mask, data) @@ -132,7 +127,7 @@ func copyOutEvents(t *kernel.Task, addr usermem.Addr, e []epoll.Event) error { // EpollWait implements the epoll_wait(2) linux syscall. func EpollWait(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - epfd := kdefs.FD(args[0].Int()) + epfd := args[0].Int() eventsAddr := args[1].Pointer() maxEvents := int(args[2].Int()) timeout := int(args[3].Int()) diff --git a/pkg/sentry/syscalls/linux/sys_eventfd.go b/pkg/sentry/syscalls/linux/sys_eventfd.go index ca4ead488..8a34c4e99 100644 --- a/pkg/sentry/syscalls/linux/sys_eventfd.go +++ b/pkg/sentry/syscalls/linux/sys_eventfd.go @@ -15,12 +15,11 @@ package linux import ( - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/eventfd" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/eventfd" + "gvisor.dev/gvisor/pkg/syserror" ) const ( @@ -38,7 +37,7 @@ func Eventfd2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc allOps := uint(EFD_SEMAPHORE | EFD_NONBLOCK | EFD_CLOEXEC) if flags & ^allOps != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } event := eventfd.New(t, uint64(initVal), flags&EFD_SEMAPHORE != 0) @@ -47,10 +46,9 @@ func Eventfd2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc }) defer event.DecRef() - fd, err := t.FDMap().NewFDFrom(0, event, kernel.FDFlags{ + fd, err := t.NewFDFrom(0, event, kernel.FDFlags{ CloseOnExec: flags&EFD_CLOEXEC != 0, - }, - t.ThreadGroup().Limits()) + }) if err != nil { return 0, nil, err } diff --git a/pkg/sentry/syscalls/linux/sys_file.go b/pkg/sentry/syscalls/linux/sys_file.go index 19f579930..2e00a91ce 100644 --- a/pkg/sentry/syscalls/linux/sys_file.go +++ b/pkg/sentry/syscalls/linux/sys_file.go @@ -17,31 +17,29 @@ package linux import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/lock" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/tmpfs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/fasync" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/lock" + "gvisor.dev/gvisor/pkg/sentry/fs/tmpfs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/kernel/fasync" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // fileOpAt performs an operation on the second last component in the path. -func fileOpAt(t *kernel.Task, dirFD kdefs.FD, path string, fn func(root *fs.Dirent, d *fs.Dirent, name string) error) error { +func fileOpAt(t *kernel.Task, dirFD int32, path string, fn func(root *fs.Dirent, d *fs.Dirent, name string, remainingTraversals uint) error) error { // Extract the last component. dir, name := fs.SplitLast(path) if dir == "/" { // Common case: we are accessing a file in the root. root := t.FSContext().RootDirectory() - err := fn(root, root, name) + err := fn(root, root, name, linux.MaxSymlinkTraversals) root.DecRef() return err } else if dir == "." && dirFD == linux.AT_FDCWD { @@ -49,19 +47,19 @@ func fileOpAt(t *kernel.Task, dirFD kdefs.FD, path string, fn func(root *fs.Dire // working directory; skip the look-up. wd := t.FSContext().WorkingDirectory() root := t.FSContext().RootDirectory() - err := fn(root, wd, name) + err := fn(root, wd, name, linux.MaxSymlinkTraversals) wd.DecRef() root.DecRef() return err } - return fileOpOn(t, dirFD, dir, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error { - return fn(root, d, name) + return fileOpOn(t, dirFD, dir, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent, remainingTraversals uint) error { + return fn(root, d, name, remainingTraversals) }) } // fileOpOn performs an operation on the last entry of the path. -func fileOpOn(t *kernel.Task, dirFD kdefs.FD, path string, resolve bool, fn func(root *fs.Dirent, d *fs.Dirent) error) error { +func fileOpOn(t *kernel.Task, dirFD int32, path string, resolve bool, fn func(root *fs.Dirent, d *fs.Dirent, remainingTraversals uint) error) error { var ( d *fs.Dirent // The file. wd *fs.Dirent // The working directory (if required.) @@ -79,7 +77,7 @@ func fileOpOn(t *kernel.Task, dirFD kdefs.FD, path string, resolve bool, fn func rel = wd } else { // Need to extract the given FD. - f = t.FDMap().GetFile(dirFD) + f = t.GetFile(dirFD) if f == nil { return syserror.EBADF } @@ -110,7 +108,7 @@ func fileOpOn(t *kernel.Task, dirFD kdefs.FD, path string, resolve bool, fn func return err } - err = fn(root, d) + err = fn(root, d, remainingTraversals) d.DecRef() return err } @@ -132,14 +130,14 @@ func copyInPath(t *kernel.Task, addr usermem.Addr, allowEmpty bool) (path string return path, dirPath, nil } -func openAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, flags uint) (fd uintptr, err error) { +func openAt(t *kernel.Task, dirFD int32, addr usermem.Addr, flags uint) (fd uintptr, err error) { path, dirPath, err := copyInPath(t, addr, false /* allowEmpty */) if err != nil { return 0, err } resolve := flags&linux.O_NOFOLLOW == 0 - err = fileOpOn(t, dirFD, path, resolve, func(root *fs.Dirent, d *fs.Dirent) error { + err = fileOpOn(t, dirFD, path, resolve, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { // First check a few things about the filesystem before trying to get the file // reference. // @@ -185,8 +183,9 @@ func openAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, flags uint) (fd u defer file.DecRef() // Success. - fdFlags := kernel.FDFlags{CloseOnExec: flags&linux.O_CLOEXEC != 0} - newFD, err := t.FDMap().NewFDFrom(0, file, fdFlags, t.ThreadGroup().Limits()) + newFD, err := t.NewFDFrom(0, file, kernel.FDFlags{ + CloseOnExec: flags&linux.O_CLOEXEC != 0, + }) if err != nil { return err } @@ -202,7 +201,7 @@ func openAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, flags uint) (fd u return fd, err // Use result in frame. } -func mknodAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, mode linux.FileMode) error { +func mknodAt(t *kernel.Task, dirFD int32, addr usermem.Addr, mode linux.FileMode) error { path, dirPath, err := copyInPath(t, addr, false /* allowEmpty */) if err != nil { return err @@ -211,7 +210,7 @@ func mknodAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, mode linux.FileM return syserror.ENOENT } - return fileOpAt(t, dirFD, path, func(root *fs.Dirent, d *fs.Dirent, name string) error { + return fileOpAt(t, dirFD, path, func(root *fs.Dirent, d *fs.Dirent, name string, _ uint) error { if !fs.IsDir(d.Inode.StableAttr) { return syserror.ENOTDIR } @@ -286,7 +285,7 @@ func Mknod(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // Mknodat implements the linux syscall mknodat(2). func Mknodat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - dirFD := kdefs.FD(args[0].Int()) + dirFD := args[0].Int() path := args[1].Pointer() mode := linux.FileMode(args[2].ModeT()) // We don't need this argument until we support creation of device nodes. @@ -295,7 +294,7 @@ func Mknodat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca return 0, nil, mknodAt(t, dirFD, path, mode) } -func createAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, flags uint, mode linux.FileMode) (fd uintptr, err error) { +func createAt(t *kernel.Task, dirFD int32, addr usermem.Addr, flags uint, mode linux.FileMode) (fd uintptr, err error) { path, dirPath, err := copyInPath(t, addr, false /* allowEmpty */) if err != nil { return 0, err @@ -304,45 +303,108 @@ func createAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, flags uint, mod return 0, syserror.ENOENT } - err = fileOpAt(t, dirFD, path, func(root *fs.Dirent, d *fs.Dirent, name string) error { - if !fs.IsDir(d.Inode.StableAttr) { - return syserror.ENOTDIR - } - - fileFlags := linuxToFlags(flags) - // Linux always adds the O_LARGEFILE flag when running in 64-bit mode. - fileFlags.LargeFile = true + fileFlags := linuxToFlags(flags) + // Linux always adds the O_LARGEFILE flag when running in 64-bit mode. + fileFlags.LargeFile = true + + err = fileOpAt(t, dirFD, path, func(root *fs.Dirent, parent *fs.Dirent, name string, remainingTraversals uint) error { + // Resolve the name to see if it exists, and follow any + // symlinks along the way. We must do the symlink resolution + // manually because if the symlink target does not exist, we + // must create the target (and not the symlink itself). + var ( + found *fs.Dirent + err error + ) + for { + if !fs.IsDir(parent.Inode.StableAttr) { + return syserror.ENOTDIR + } - // Does this file exist already? - remainingTraversals := uint(linux.MaxSymlinkTraversals) - targetDirent, err := t.MountNamespace().FindInode(t, root, d, name, &remainingTraversals) - var newFile *fs.File - switch err { - case nil: - // The file existed. - defer targetDirent.DecRef() + // Start by looking up the dirent at 'name'. + found, err = t.MountNamespace().FindLink(t, root, parent, name, &remainingTraversals) + if err != nil { + break + } + defer found.DecRef() - // Check if we wanted to create. + // We found something (possibly a symlink). If the + // O_EXCL flag was passed, then we can immediately + // return EEXIST. if flags&linux.O_EXCL != 0 { return syserror.EEXIST } + // If we have a non-symlink, then we can proceed. + if !fs.IsSymlink(found.Inode.StableAttr) { + break + } + + // If O_NOFOLLOW was passed, then don't try to resolve + // anything. + if flags&linux.O_NOFOLLOW != 0 { + return syserror.ELOOP + } + + // Try to resolve the symlink directly to a Dirent. + var resolved *fs.Dirent + resolved, err = found.Inode.Getlink(t) + if err == nil { + // No more resolution necessary. + defer resolved.DecRef() + break + } + if err != fs.ErrResolveViaReadlink { + return err + } + + // Are we able to resolve further? + if remainingTraversals == 0 { + return syscall.ELOOP + } + + // Resolve the symlink to a path via Readlink. + var path string + path, err = found.Inode.Readlink(t) + if err != nil { + break + } + remainingTraversals-- + + // Get the new parent from the target path. + var newParent *fs.Dirent + newParentPath, newName := fs.SplitLast(path) + newParent, err = t.MountNamespace().FindInode(t, root, parent, newParentPath, &remainingTraversals) + if err != nil { + break + } + defer newParent.DecRef() + + // Repeat the process with the parent and name of the + // symlink target. + parent = newParent + name = newName + } + + var newFile *fs.File + switch err { + case nil: // Like sys_open, check for a few things about the // filesystem before trying to get a reference to the // fs.File. The same constraints on Check apply. - if err := targetDirent.Inode.CheckPermission(t, flagsToPermissions(flags)); err != nil { + if err := found.Inode.CheckPermission(t, flagsToPermissions(flags)); err != nil { return err } // Should we truncate the file? if flags&linux.O_TRUNC != 0 { - if err := targetDirent.Inode.Truncate(t, targetDirent, 0); err != nil { + if err := found.Inode.Truncate(t, found, 0); err != nil { return err } } // Create a new fs.File. - newFile, err = targetDirent.Inode.GetFile(t, targetDirent, fileFlags) + newFile, err = found.Inode.GetFile(t, found, fileFlags) if err != nil { return syserror.ConvertIntr(err, kernel.ERESTARTSYS) } @@ -351,26 +413,27 @@ func createAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, flags uint, mod // File does not exist. Proceed with creation. // Do we have write permissions on the parent? - if err := d.Inode.CheckPermission(t, fs.PermMask{Write: true, Execute: true}); err != nil { + if err := parent.Inode.CheckPermission(t, fs.PermMask{Write: true, Execute: true}); err != nil { return err } // Attempt a creation. perms := fs.FilePermsFromMode(mode &^ linux.FileMode(t.FSContext().Umask())) - newFile, err = d.Create(t, root, name, fileFlags, perms) + newFile, err = parent.Create(t, root, name, fileFlags, perms) if err != nil { // No luck, bail. return err } defer newFile.DecRef() - targetDirent = newFile.Dirent + found = newFile.Dirent default: return err } // Success. - fdFlags := kernel.FDFlags{CloseOnExec: flags&linux.O_CLOEXEC != 0} - newFD, err := t.FDMap().NewFDFrom(0, newFile, fdFlags, t.ThreadGroup().Limits()) + newFD, err := t.NewFDFrom(0, newFile, kernel.FDFlags{ + CloseOnExec: flags&linux.O_CLOEXEC != 0, + }) if err != nil { return err } @@ -379,10 +442,10 @@ func createAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, flags uint, mod fd = uintptr(newFD) // Queue the open inotify event. The creation event is - // automatically queued when the dirent is targetDirent. The - // open events are implemented at the syscall layer so we need - // to manually queue one here. - targetDirent.InotifyEvent(linux.IN_OPEN, 0) + // automatically queued when the dirent is found. The open + // events are implemented at the syscall layer so we need to + // manually queue one here. + found.InotifyEvent(linux.IN_OPEN, 0) return nil }) @@ -404,7 +467,7 @@ func Open(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC // Openat implements linux syscall openat(2). func Openat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - dirFD := kdefs.FD(args[0].Int()) + dirFD := args[0].Int() addr := args[1].Pointer() flags := uint(args[2].Uint()) if flags&linux.O_CREAT != 0 { @@ -443,7 +506,7 @@ func (ac accessContext) Value(key interface{}) interface{} { } } -func accessAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, resolve bool, mode uint) error { +func accessAt(t *kernel.Task, dirFD int32, addr usermem.Addr, resolve bool, mode uint) error { const rOK = 4 const wOK = 2 const xOK = 1 @@ -458,7 +521,7 @@ func accessAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, resolve bool, m return syserror.EINVAL } - return fileOpOn(t, dirFD, path, resolve, func(root *fs.Dirent, d *fs.Dirent) error { + return fileOpOn(t, dirFD, path, resolve, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { // access(2) and faccessat(2) check permissions using real // UID/GID, not effective UID/GID. // @@ -498,7 +561,7 @@ func Access(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Faccessat implements linux syscall faccessat(2). func Faccessat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - dirFD := kdefs.FD(args[0].Int()) + dirFD := args[0].Int() addr := args[1].Pointer() mode := args[2].ModeT() flags := args[3].Int() @@ -508,10 +571,10 @@ func Faccessat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys // Ioctl implements linux syscall ioctl(2). func Ioctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() request := int(args[1].Int()) - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -520,12 +583,12 @@ func Ioctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // Shared flags between file and socket. switch request { case linux.FIONCLEX: - t.FDMap().SetFlags(fd, kernel.FDFlags{ + t.FDTable().SetFlags(fd, kernel.FDFlags{ CloseOnExec: false, }) return 0, nil, nil case linux.FIOCLEX: - t.FDMap().SetFlags(fd, kernel.FDFlags{ + t.FDTable().SetFlags(fd, kernel.FDFlags{ CloseOnExec: true, }) return 0, nil, nil @@ -572,7 +635,7 @@ func Ioctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall return 0, nil, err default: - ret, err := file.FileOperations.Ioctl(t, t.MemoryManager(), args) + ret, err := file.FileOperations.Ioctl(t, file, t.MemoryManager(), args) if err != nil { return 0, nil, err } @@ -626,7 +689,7 @@ func Chroot(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal return 0, nil, err } - return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error { + return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { // Is it a directory? if !fs.IsDir(d.Inode.StableAttr) { return syserror.ENOTDIR @@ -651,7 +714,7 @@ func Chdir(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall return 0, nil, err } - return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error { + return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { // Is it a directory? if !fs.IsDir(d.Inode.StableAttr) { return syserror.ENOTDIR @@ -669,9 +732,9 @@ func Chdir(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // Fchdir implements the linux syscall fchdir(2). func Fchdir(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -693,44 +756,47 @@ func Fchdir(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Close implements linux syscall close(2). func Close(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() - file, ok := t.FDMap().Remove(fd) - if !ok { + // Note that Remove provides a reference on the file that we may use to + // flush. It is still active until we drop the final reference below + // (and other reference-holding operations complete). + file := t.FDTable().Remove(fd) + if file == nil { return 0, nil, syserror.EBADF } defer file.DecRef() err := file.Flush(t) - return 0, nil, handleIOError(t, false /* partial */, err, syscall.EINTR, "close", file) + return 0, nil, handleIOError(t, false /* partial */, err, syserror.EINTR, "close", file) } // Dup implements linux syscall dup(2). func Dup(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } defer file.DecRef() - newfd, err := t.FDMap().NewFDFrom(0, file, kernel.FDFlags{}, t.ThreadGroup().Limits()) + newFD, err := t.NewFDFrom(0, file, kernel.FDFlags{}) if err != nil { return 0, nil, syserror.EMFILE } - return uintptr(newfd), nil, nil + return uintptr(newFD), nil, nil } // Dup2 implements linux syscall dup2(2). func Dup2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - oldfd := kdefs.FD(args[0].Int()) - newfd := kdefs.FD(args[1].Int()) + oldfd := args[0].Int() + newfd := args[1].Int() // If oldfd is a valid file descriptor, and newfd has the same value as oldfd, // then dup2() does nothing, and returns newfd. if oldfd == newfd { - oldFile := t.FDMap().GetFile(oldfd) + oldFile := t.GetFile(oldfd) if oldFile == nil { return 0, nil, syserror.EBADF } @@ -746,21 +812,21 @@ func Dup2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC // Dup3 implements linux syscall dup3(2). func Dup3(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - oldfd := kdefs.FD(args[0].Int()) - newfd := kdefs.FD(args[1].Int()) + oldfd := args[0].Int() + newfd := args[1].Int() flags := args[2].Uint() if oldfd == newfd { return 0, nil, syserror.EINVAL } - oldFile := t.FDMap().GetFile(oldfd) + oldFile := t.GetFile(oldfd) if oldFile == nil { return 0, nil, syserror.EBADF } defer oldFile.DecRef() - err := t.FDMap().NewFDAt(newfd, oldFile, kernel.FDFlags{CloseOnExec: flags&linux.O_CLOEXEC != 0}, t.ThreadGroup().Limits()) + err := t.NewFDAt(newfd, oldFile, kernel.FDFlags{CloseOnExec: flags&linux.O_CLOEXEC != 0}) if err != nil { return 0, nil, err } @@ -803,10 +869,10 @@ func fSetOwn(t *kernel.Task, file *fs.File, who int32) { // Fcntl implements linux syscall fcntl(2). func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() cmd := args[1].Int() - file, flags := t.FDMap().GetDescriptor(fd) + file, flags := t.FDTable().Get(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -814,9 +880,10 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall switch cmd { case linux.F_DUPFD, linux.F_DUPFD_CLOEXEC: - from := kdefs.FD(args[2].Int()) - fdFlags := kernel.FDFlags{CloseOnExec: cmd == linux.F_DUPFD_CLOEXEC} - fd, err := t.FDMap().NewFDFrom(from, file, fdFlags, t.ThreadGroup().Limits()) + from := args[2].Int() + fd, err := t.NewFDFrom(from, file, kernel.FDFlags{ + CloseOnExec: cmd == linux.F_DUPFD_CLOEXEC, + }) if err != nil { return 0, nil, err } @@ -825,7 +892,7 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall return uintptr(flags.ToLinuxFDFlags()), nil, nil case linux.F_SETFD: flags := args[2].Uint() - t.FDMap().SetFlags(fd, kernel.FDFlags{ + t.FDTable().SetFlags(fd, kernel.FDFlags{ CloseOnExec: flags&linux.FD_CLOEXEC != 0, }) case linux.F_GETFL: @@ -843,7 +910,7 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // Copy in the lock request. flockAddr := args[2].Pointer() - var flock syscall.Flock_t + var flock linux.Flock if _, err := t.CopyIn(flockAddr, &flock); err != nil { return 0, nil, err } @@ -886,17 +953,17 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall return 0, nil, err } - // The lock uid is that of the Task's FDMap. - lockUniqueID := lock.UniqueID(t.FDMap().ID()) + // The lock uid is that of the Task's FDTable. + lockUniqueID := lock.UniqueID(t.FDTable().ID()) // These locks don't block; execute the non-blocking operation using the inode's lock // context directly. switch flock.Type { - case syscall.F_RDLCK: + case linux.F_RDLCK: if !file.Flags().Read { return 0, nil, syserror.EBADF } - if cmd == syscall.F_SETLK { + if cmd == linux.F_SETLK { // Non-blocking lock, provide a nil lock.Blocker. if !file.Dirent.Inode.LockCtx.Posix.LockRegion(lockUniqueID, lock.ReadLock, rng, nil) { return 0, nil, syserror.EAGAIN @@ -908,11 +975,11 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall } } return 0, nil, nil - case syscall.F_WRLCK: + case linux.F_WRLCK: if !file.Flags().Write { return 0, nil, syserror.EBADF } - if cmd == syscall.F_SETLK { + if cmd == linux.F_SETLK { // Non-blocking lock, provide a nil lock.Blocker. if !file.Dirent.Inode.LockCtx.Posix.LockRegion(lockUniqueID, lock.WriteLock, rng, nil) { return 0, nil, syserror.EAGAIN @@ -924,7 +991,7 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall } } return 0, nil, nil - case syscall.F_UNLCK: + case linux.F_UNLCK: file.Dirent.Inode.LockCtx.Posix.UnlockRegion(lockUniqueID, rng) return 0, nil, nil default: @@ -945,17 +1012,18 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall err := tmpfs.AddSeals(file.Dirent.Inode, args[2].Uint()) return 0, nil, err case linux.F_GETPIPE_SZ: - sz, ok := file.FileOperations.(pipe.Sizer) + sz, ok := file.FileOperations.(fs.FifoSizer) if !ok { return 0, nil, syserror.EINVAL } - return uintptr(sz.PipeSize()), nil, nil + size, err := sz.FifoSize(t, file) + return uintptr(size), nil, err case linux.F_SETPIPE_SZ: - sz, ok := file.FileOperations.(pipe.Sizer) + sz, ok := file.FileOperations.(fs.FifoSizer) if !ok { return 0, nil, syserror.EINVAL } - n, err := sz.SetPipeSize(int64(args[2].Int())) + n, err := sz.SetFifoSize(int64(args[2].Int())) return uintptr(n), nil, err default: // Everything else is not yet supported. @@ -976,7 +1044,7 @@ const ( // Fadvise64 implements linux syscall fadvise64(2). // This implementation currently ignores the provided advice. func Fadvise64(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() length := args[2].Int64() advice := args[3].Int() @@ -985,7 +1053,7 @@ func Fadvise64(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys return 0, nil, syserror.EINVAL } - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -1011,13 +1079,13 @@ func Fadvise64(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys return 0, nil, nil } -func mkdirAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, mode linux.FileMode) error { +func mkdirAt(t *kernel.Task, dirFD int32, addr usermem.Addr, mode linux.FileMode) error { path, _, err := copyInPath(t, addr, false /* allowEmpty */) if err != nil { return err } - return fileOpAt(t, dirFD, path, func(root *fs.Dirent, d *fs.Dirent, name string) error { + return fileOpAt(t, dirFD, path, func(root *fs.Dirent, d *fs.Dirent, name string, _ uint) error { if !fs.IsDir(d.Inode.StableAttr) { return syserror.ENOTDIR } @@ -1056,14 +1124,14 @@ func Mkdir(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // Mkdirat implements linux syscall mkdirat(2). func Mkdirat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - dirFD := kdefs.FD(args[0].Int()) + dirFD := args[0].Int() addr := args[1].Pointer() mode := linux.FileMode(args[2].ModeT()) return 0, nil, mkdirAt(t, dirFD, addr, mode) } -func rmdirAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr) error { +func rmdirAt(t *kernel.Task, dirFD int32, addr usermem.Addr) error { path, _, err := copyInPath(t, addr, false /* allowEmpty */) if err != nil { return err @@ -1074,7 +1142,7 @@ func rmdirAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr) error { return syserror.EBUSY } - return fileOpAt(t, dirFD, path, func(root *fs.Dirent, d *fs.Dirent, name string) error { + return fileOpAt(t, dirFD, path, func(root *fs.Dirent, d *fs.Dirent, name string, _ uint) error { if !fs.IsDir(d.Inode.StableAttr) { return syserror.ENOTDIR } @@ -1103,7 +1171,7 @@ func Rmdir(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall return 0, nil, rmdirAt(t, linux.AT_FDCWD, addr) } -func symlinkAt(t *kernel.Task, dirFD kdefs.FD, newAddr usermem.Addr, oldAddr usermem.Addr) error { +func symlinkAt(t *kernel.Task, dirFD int32, newAddr usermem.Addr, oldAddr usermem.Addr) error { newPath, dirPath, err := copyInPath(t, newAddr, false /* allowEmpty */) if err != nil { return err @@ -1122,7 +1190,7 @@ func symlinkAt(t *kernel.Task, dirFD kdefs.FD, newAddr usermem.Addr, oldAddr use return syserror.ENOENT } - return fileOpAt(t, dirFD, newPath, func(root *fs.Dirent, d *fs.Dirent, name string) error { + return fileOpAt(t, dirFD, newPath, func(root *fs.Dirent, d *fs.Dirent, name string, _ uint) error { if !fs.IsDir(d.Inode.StableAttr) { return syserror.ENOTDIR } @@ -1146,7 +1214,7 @@ func Symlink(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca // Symlinkat implements linux syscall symlinkat(2). func Symlinkat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { oldAddr := args[0].Pointer() - dirFD := kdefs.FD(args[1].Int()) + dirFD := args[1].Int() newAddr := args[2].Pointer() return 0, nil, symlinkAt(t, dirFD, newAddr, oldAddr) @@ -1188,7 +1256,7 @@ func mayLinkAt(t *kernel.Task, target *fs.Inode) error { // linkAt creates a hard link to the target specified by oldDirFD and oldAddr, // specified by newDirFD and newAddr. If resolve is true, then the symlinks // will be followed when evaluating the target. -func linkAt(t *kernel.Task, oldDirFD kdefs.FD, oldAddr usermem.Addr, newDirFD kdefs.FD, newAddr usermem.Addr, resolve, allowEmpty bool) error { +func linkAt(t *kernel.Task, oldDirFD int32, oldAddr usermem.Addr, newDirFD int32, newAddr usermem.Addr, resolve, allowEmpty bool) error { oldPath, _, err := copyInPath(t, oldAddr, allowEmpty) if err != nil { return err @@ -1202,7 +1270,7 @@ func linkAt(t *kernel.Task, oldDirFD kdefs.FD, oldAddr usermem.Addr, newDirFD kd } if allowEmpty && oldPath == "" { - target := t.FDMap().GetFile(oldDirFD) + target := t.GetFile(oldDirFD) if target == nil { return syserror.EBADF } @@ -1212,7 +1280,7 @@ func linkAt(t *kernel.Task, oldDirFD kdefs.FD, oldAddr usermem.Addr, newDirFD kd } // Resolve the target directory. - return fileOpAt(t, newDirFD, newPath, func(root *fs.Dirent, newParent *fs.Dirent, newName string) error { + return fileOpAt(t, newDirFD, newPath, func(root *fs.Dirent, newParent *fs.Dirent, newName string, _ uint) error { if !fs.IsDir(newParent.Inode.StableAttr) { return syserror.ENOTDIR } @@ -1227,13 +1295,13 @@ func linkAt(t *kernel.Task, oldDirFD kdefs.FD, oldAddr usermem.Addr, newDirFD kd // Resolve oldDirFD and oldAddr to a dirent. The "resolve" argument // only applies to this name. - return fileOpOn(t, oldDirFD, oldPath, resolve, func(root *fs.Dirent, target *fs.Dirent) error { + return fileOpOn(t, oldDirFD, oldPath, resolve, func(root *fs.Dirent, target *fs.Dirent, _ uint) error { if err := mayLinkAt(t, target.Inode); err != nil { return err } // Next resolve newDirFD and newAddr to the parent dirent and name. - return fileOpAt(t, newDirFD, newPath, func(root *fs.Dirent, newParent *fs.Dirent, newName string) error { + return fileOpAt(t, newDirFD, newPath, func(root *fs.Dirent, newParent *fs.Dirent, newName string, _ uint) error { if !fs.IsDir(newParent.Inode.StableAttr) { return syserror.ENOTDIR } @@ -1264,9 +1332,9 @@ func Link(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC // Linkat implements linux syscall linkat(2). func Linkat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - oldDirFD := kdefs.FD(args[0].Int()) + oldDirFD := args[0].Int() oldAddr := args[1].Pointer() - newDirFD := kdefs.FD(args[2].Int()) + newDirFD := args[2].Int() newAddr := args[3].Pointer() // man linkat(2): @@ -1291,7 +1359,7 @@ func Linkat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal return 0, nil, linkAt(t, oldDirFD, oldAddr, newDirFD, newAddr, resolve, allowEmpty) } -func readlinkAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, bufAddr usermem.Addr, size uint) (copied uintptr, err error) { +func readlinkAt(t *kernel.Task, dirFD int32, addr usermem.Addr, bufAddr usermem.Addr, size uint) (copied uintptr, err error) { path, dirPath, err := copyInPath(t, addr, false /* allowEmpty */) if err != nil { return 0, err @@ -1300,7 +1368,7 @@ func readlinkAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, bufAddr userm return 0, syserror.ENOENT } - err = fileOpOn(t, dirFD, path, false /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error { + err = fileOpOn(t, dirFD, path, false /* resolve */, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { // Check for Read permission. if err := d.Inode.CheckPermission(t, fs.PermMask{Read: true}); err != nil { return err @@ -1341,7 +1409,7 @@ func Readlink(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // Readlinkat implements linux syscall readlinkat(2). func Readlinkat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - dirFD := kdefs.FD(args[0].Int()) + dirFD := args[0].Int() addr := args[1].Pointer() bufAddr := args[2].Pointer() size := args[3].SizeT() @@ -1350,7 +1418,7 @@ func Readlinkat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sy return n, nil, err } -func unlinkAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr) error { +func unlinkAt(t *kernel.Task, dirFD int32, addr usermem.Addr) error { path, dirPath, err := copyInPath(t, addr, false /* allowEmpty */) if err != nil { return err @@ -1359,7 +1427,7 @@ func unlinkAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr) error { return syserror.ENOENT } - return fileOpAt(t, dirFD, path, func(root *fs.Dirent, d *fs.Dirent, name string) error { + return fileOpAt(t, dirFD, path, func(root *fs.Dirent, d *fs.Dirent, name string, _ uint) error { if !fs.IsDir(d.Inode.StableAttr) { return syserror.ENOTDIR } @@ -1380,7 +1448,7 @@ func Unlink(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Unlinkat implements linux syscall unlinkat(2). func Unlinkat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - dirFD := kdefs.FD(args[0].Int()) + dirFD := args[0].Int() addr := args[1].Pointer() flags := args[2].Uint() if flags&linux.AT_REMOVEDIR != 0 { @@ -1408,13 +1476,13 @@ func Truncate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc if uint64(length) >= t.ThreadGroup().Limits().Get(limits.FileSize).Cur { t.SendSignal(&arch.SignalInfo{ - Signo: int32(syscall.SIGXFSZ), + Signo: int32(linux.SIGXFSZ), Code: arch.SignalInfoUser, }) return 0, nil, syserror.EFBIG } - return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error { + return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { if fs.IsDir(d.Inode.StableAttr) { return syserror.EISDIR } @@ -1441,10 +1509,10 @@ func Truncate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // Ftruncate implements linux syscall ftruncate(2). func Ftruncate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() length := args[1].Int64() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -1468,7 +1536,7 @@ func Ftruncate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys if uint64(length) >= t.ThreadGroup().Limits().Get(limits.FileSize).Cur { t.SendSignal(&arch.SignalInfo{ - Signo: int32(syscall.SIGXFSZ), + Signo: int32(linux.SIGXFSZ), Code: arch.SignalInfoUser, }) return 0, nil, syserror.EFBIG @@ -1559,7 +1627,7 @@ func chown(t *kernel.Task, d *fs.Dirent, uid auth.UID, gid auth.GID) error { return nil } -func chownAt(t *kernel.Task, fd kdefs.FD, addr usermem.Addr, resolve, allowEmpty bool, uid auth.UID, gid auth.GID) error { +func chownAt(t *kernel.Task, fd int32, addr usermem.Addr, resolve, allowEmpty bool, uid auth.UID, gid auth.GID) error { path, _, err := copyInPath(t, addr, allowEmpty) if err != nil { return err @@ -1567,7 +1635,7 @@ func chownAt(t *kernel.Task, fd kdefs.FD, addr usermem.Addr, resolve, allowEmpty if path == "" { // Annoying. What's wrong with fchown? - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return syserror.EBADF } @@ -1576,7 +1644,7 @@ func chownAt(t *kernel.Task, fd kdefs.FD, addr usermem.Addr, resolve, allowEmpty return chown(t, file.Dirent, uid, gid) } - return fileOpOn(t, fd, path, resolve, func(root *fs.Dirent, d *fs.Dirent) error { + return fileOpOn(t, fd, path, resolve, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { return chown(t, d, uid, gid) }) } @@ -1601,11 +1669,11 @@ func Lchown(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Fchown implements linux syscall fchown(2). func Fchown(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() uid := auth.UID(args[1].Uint()) gid := auth.GID(args[2].Uint()) - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -1616,7 +1684,7 @@ func Fchown(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Fchownat implements Linux syscall fchownat(2). func Fchownat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - dirFD := kdefs.FD(args[0].Int()) + dirFD := args[0].Int() addr := args[1].Pointer() uid := auth.UID(args[2].Uint()) gid := auth.GID(args[3].Uint()) @@ -1646,13 +1714,13 @@ func chmod(t *kernel.Task, d *fs.Dirent, mode linux.FileMode) error { return nil } -func chmodAt(t *kernel.Task, fd kdefs.FD, addr usermem.Addr, mode linux.FileMode) error { +func chmodAt(t *kernel.Task, fd int32, addr usermem.Addr, mode linux.FileMode) error { path, _, err := copyInPath(t, addr, false /* allowEmpty */) if err != nil { return err } - return fileOpOn(t, fd, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error { + return fileOpOn(t, fd, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { return chmod(t, d, mode) }) } @@ -1667,10 +1735,10 @@ func Chmod(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // Fchmod implements linux syscall fchmod(2). func Fchmod(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() mode := linux.FileMode(args[1].ModeT()) - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -1681,7 +1749,7 @@ func Fchmod(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Fchmodat implements linux syscall fchmodat(2). func Fchmodat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() mode := linux.FileMode(args[2].ModeT()) @@ -1697,8 +1765,8 @@ func defaultSetToSystemTimeSpec() fs.TimeSpec { } } -func utimes(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, ts fs.TimeSpec, resolve bool) error { - setTimestamp := func(root *fs.Dirent, d *fs.Dirent) error { +func utimes(t *kernel.Task, dirFD int32, addr usermem.Addr, ts fs.TimeSpec, resolve bool) error { + setTimestamp := func(root *fs.Dirent, d *fs.Dirent, _ uint) error { // Does the task own the file? if !d.Inode.CheckOwnership(t) { // Trying to set a specific time? Must be owner. @@ -1730,7 +1798,7 @@ func utimes(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, ts fs.TimeSpec, r // Linux returns EINVAL in this case. See utimes.c. return syserror.EINVAL } - f := t.FDMap().GetFile(dirFD) + f := t.GetFile(dirFD) if f == nil { return syserror.EBADF } @@ -1739,7 +1807,7 @@ func utimes(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, ts fs.TimeSpec, r root := t.FSContext().RootDirectory() defer root.DecRef() - return setTimestamp(root, f.Dirent) + return setTimestamp(root, f.Dirent, linux.MaxSymlinkTraversals) } path, _, err := copyInPath(t, addr, false /* allowEmpty */) @@ -1758,7 +1826,7 @@ func Utime(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // No timesAddr argument will be interpreted as current system time. ts := defaultSetToSystemTimeSpec() if timesAddr != 0 { - var times syscall.Utimbuf + var times linux.Utime if _, err := t.CopyIn(timesAddr, ×); err != nil { return 0, nil, err } @@ -1798,7 +1866,7 @@ func timespecIsValid(ts linux.Timespec) bool { // Utimensat implements linux syscall utimensat(2). func Utimensat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - dirFD := kdefs.FD(args[0].Int()) + dirFD := args[0].Int() pathnameAddr := args[1].Pointer() timesAddr := args[2].Pointer() flags := args[3].Int() @@ -1833,7 +1901,7 @@ func Utimensat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys // Futimesat implements linux syscall futimesat(2). func Futimesat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - dirFD := kdefs.FD(args[0].Int()) + dirFD := args[0].Int() pathnameAddr := args[1].Pointer() timesAddr := args[2].Pointer() @@ -1857,7 +1925,7 @@ func Futimesat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys return 0, nil, utimes(t, dirFD, pathnameAddr, ts, true) } -func renameAt(t *kernel.Task, oldDirFD kdefs.FD, oldAddr usermem.Addr, newDirFD kdefs.FD, newAddr usermem.Addr) error { +func renameAt(t *kernel.Task, oldDirFD int32, oldAddr usermem.Addr, newDirFD int32, newAddr usermem.Addr) error { newPath, _, err := copyInPath(t, newAddr, false /* allowEmpty */) if err != nil { return err @@ -1867,7 +1935,7 @@ func renameAt(t *kernel.Task, oldDirFD kdefs.FD, oldAddr usermem.Addr, newDirFD return err } - return fileOpAt(t, oldDirFD, oldPath, func(root *fs.Dirent, oldParent *fs.Dirent, oldName string) error { + return fileOpAt(t, oldDirFD, oldPath, func(root *fs.Dirent, oldParent *fs.Dirent, oldName string, _ uint) error { if !fs.IsDir(oldParent.Inode.StableAttr) { return syserror.ENOTDIR } @@ -1879,7 +1947,7 @@ func renameAt(t *kernel.Task, oldDirFD kdefs.FD, oldAddr usermem.Addr, newDirFD return syserror.EBUSY } - return fileOpAt(t, newDirFD, newPath, func(root *fs.Dirent, newParent *fs.Dirent, newName string) error { + return fileOpAt(t, newDirFD, newPath, func(root *fs.Dirent, newParent *fs.Dirent, newName string, _ uint) error { if !fs.IsDir(newParent.Inode.StableAttr) { return syserror.ENOTDIR } @@ -1905,21 +1973,21 @@ func Rename(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Renameat implements linux syscall renameat(2). func Renameat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - oldDirFD := kdefs.FD(args[0].Int()) + oldDirFD := args[0].Int() oldPathAddr := args[1].Pointer() - newDirFD := kdefs.FD(args[2].Int()) + newDirFD := args[2].Int() newPathAddr := args[3].Pointer() return 0, nil, renameAt(t, oldDirFD, oldPathAddr, newDirFD, newPathAddr) } // Fallocate implements linux system call fallocate(2). func Fallocate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() mode := args[1].Int64() offset := args[2].Int64() length := args[3].Int64() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -1950,7 +2018,7 @@ func Fallocate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys } if uint64(size) >= t.ThreadGroup().Limits().Get(limits.FileSize).Cur { t.SendSignal(&arch.SignalInfo{ - Signo: int32(syscall.SIGXFSZ), + Signo: int32(linux.SIGXFSZ), Code: arch.SignalInfoUser, }) return 0, nil, syserror.EFBIG @@ -1968,10 +2036,10 @@ func Fallocate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys // Flock implements linux syscall flock(2). func Flock(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() operation := args[1].Int() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { // flock(2): EBADF fd is not an open file descriptor. return 0, nil, syserror.EBADF @@ -2067,7 +2135,7 @@ func MemfdCreate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S name = memfdPrefix + name inode := tmpfs.NewMemfdInode(t, allowSeals) - dirent := fs.NewDirent(inode, name) + dirent := fs.NewDirent(t, inode, name) // Per Linux, mm/shmem.c:__shmem_file_setup(), memfd files are set up with // FMODE_READ | FMODE_WRITE. file, err := inode.GetFile(t, dirent, fs.FileFlags{Read: true, Write: true}) @@ -2078,8 +2146,9 @@ func MemfdCreate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S defer dirent.DecRef() defer file.DecRef() - fdFlags := kernel.FDFlags{CloseOnExec: cloExec} - newFD, err := t.FDMap().NewFDFrom(0, file, fdFlags, t.ThreadGroup().Limits()) + newFD, err := t.NewFDFrom(0, file, kernel.FDFlags{ + CloseOnExec: cloExec, + }) if err != nil { return 0, nil, err } diff --git a/pkg/sentry/syscalls/linux/sys_futex.go b/pkg/sentry/syscalls/linux/sys_futex.go index 7cef4b50c..b9bd25464 100644 --- a/pkg/sentry/syscalls/linux/sys_futex.go +++ b/pkg/sentry/syscalls/linux/sys_futex.go @@ -17,12 +17,12 @@ package linux import ( "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // futexWaitRestartBlock encapsulates the state required to restart futex(2) diff --git a/pkg/sentry/syscalls/linux/sys_getdents.go b/pkg/sentry/syscalls/linux/sys_getdents.go index 1b597d5bc..63e2c5a5d 100644 --- a/pkg/sentry/syscalls/linux/sys_getdents.go +++ b/pkg/sentry/syscalls/linux/sys_getdents.go @@ -17,20 +17,19 @@ package linux import ( "bytes" "io" - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // Getdents implements linux syscall getdents(2) for 64bit systems. func Getdents(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() size := int(args[2].Uint()) @@ -46,7 +45,7 @@ func Getdents(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // Getdents64 implements linux syscall getdents64(2). func Getdents64(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() size := int(args[2].Uint()) @@ -62,8 +61,8 @@ func Getdents64(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sy // getdents implements the core of getdents(2)/getdents64(2). // f is the syscall implementation dirent serialization function. -func getdents(t *kernel.Task, fd kdefs.FD, addr usermem.Addr, size int, f func(*dirent, io.Writer) (int, error)) (uintptr, error) { - dir := t.FDMap().GetFile(fd) +func getdents(t *kernel.Task, fd int32, addr usermem.Addr, size int, f func(*dirent, io.Writer) (int, error)) (uintptr, error) { + dir := t.GetFile(fd) if dir == nil { return 0, syserror.EBADF } @@ -83,7 +82,7 @@ func getdents(t *kernel.Task, fd kdefs.FD, addr usermem.Addr, size int, f func(* switch err := handleIOError(t, ds.Written() > 0, rerr, kernel.ERESTARTSYS, "getdents", dir); err { case nil: - dir.Dirent.InotifyEvent(syscall.IN_ACCESS, 0) + dir.Dirent.InotifyEvent(linux.IN_ACCESS, 0) return uintptr(ds.Written()), nil case io.EOF: return 0, nil @@ -147,21 +146,21 @@ func smallestDirent64(a arch.Context) uint { func toType(nodeType fs.InodeType) uint8 { switch nodeType { case fs.RegularFile, fs.SpecialFile: - return syscall.DT_REG + return linux.DT_REG case fs.Symlink: - return syscall.DT_LNK + return linux.DT_LNK case fs.Directory, fs.SpecialDirectory: - return syscall.DT_DIR + return linux.DT_DIR case fs.Pipe: - return syscall.DT_FIFO + return linux.DT_FIFO case fs.CharacterDevice: - return syscall.DT_CHR + return linux.DT_CHR case fs.BlockDevice: - return syscall.DT_BLK + return linux.DT_BLK case fs.Socket: - return syscall.DT_SOCK + return linux.DT_SOCK default: - return syscall.DT_UNKNOWN + return linux.DT_UNKNOWN } } diff --git a/pkg/sentry/syscalls/linux/sys_identity.go b/pkg/sentry/syscalls/linux/sys_identity.go index 27e765a2d..715ac45e6 100644 --- a/pkg/sentry/syscalls/linux/sys_identity.go +++ b/pkg/sentry/syscalls/linux/sys_identity.go @@ -15,10 +15,10 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/syserror" ) const ( diff --git a/pkg/sentry/syscalls/linux/sys_inotify.go b/pkg/sentry/syscalls/linux/sys_inotify.go index 20269a769..b2c7b3444 100644 --- a/pkg/sentry/syscalls/linux/sys_inotify.go +++ b/pkg/sentry/syscalls/linux/sys_inotify.go @@ -15,14 +15,12 @@ package linux import ( - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/anon" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/anon" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) const allFlags = int(linux.IN_NONBLOCK | linux.IN_CLOEXEC) @@ -32,10 +30,10 @@ func InotifyInit1(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel. flags := int(args[0].Int()) if flags&^allFlags != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } - dirent := fs.NewDirent(anon.NewInode(t), "inotify") + dirent := fs.NewDirent(t, anon.NewInode(t), "inotify") fileFlags := fs.FileFlags{ Read: true, Write: true, @@ -44,9 +42,9 @@ func InotifyInit1(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel. n := fs.NewFile(t, dirent, fileFlags, fs.NewInotify(t)) defer n.DecRef() - fd, err := t.FDMap().NewFDFrom(0, n, kernel.FDFlags{ + fd, err := t.NewFDFrom(0, n, kernel.FDFlags{ CloseOnExec: flags&linux.IN_CLOEXEC != 0, - }, t.ThreadGroup().Limits()) + }) if err != nil { return 0, nil, err @@ -63,18 +61,18 @@ func InotifyInit(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S // fdToInotify resolves an fd to an inotify object. If successful, the file will // have an extra ref and the caller is responsible for releasing the ref. -func fdToInotify(t *kernel.Task, fd kdefs.FD) (*fs.Inotify, *fs.File, error) { - file := t.FDMap().GetFile(fd) +func fdToInotify(t *kernel.Task, fd int32) (*fs.Inotify, *fs.File, error) { + file := t.GetFile(fd) if file == nil { // Invalid fd. - return nil, nil, syscall.EBADF + return nil, nil, syserror.EBADF } ino, ok := file.FileOperations.(*fs.Inotify) if !ok { // Not an inotify fd. file.DecRef() - return nil, nil, syscall.EINVAL + return nil, nil, syserror.EINVAL } return ino, file, nil @@ -82,7 +80,7 @@ func fdToInotify(t *kernel.Task, fd kdefs.FD) (*fs.Inotify, *fs.File, error) { // InotifyAddWatch implements the inotify_add_watch() syscall. func InotifyAddWatch(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() mask := args[2].Uint() @@ -93,7 +91,7 @@ func InotifyAddWatch(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kern // "EINVAL: The given event mask contains no valid events." // -- inotify_add_watch(2) if validBits := mask & linux.ALL_INOTIFY_BITS; validBits == 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } ino, file, err := fdToInotify(t, fd) @@ -107,14 +105,14 @@ func InotifyAddWatch(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kern return 0, nil, err } - err = fileOpOn(t, linux.AT_FDCWD, path, resolve, func(root *fs.Dirent, dirent *fs.Dirent) error { + err = fileOpOn(t, linux.AT_FDCWD, path, resolve, func(root *fs.Dirent, dirent *fs.Dirent, _ uint) error { // "IN_ONLYDIR: Only watch pathname if it is a directory." -- inotify(7) if onlyDir := mask&linux.IN_ONLYDIR != 0; onlyDir && !fs.IsDir(dirent.Inode.StableAttr) { - return syscall.ENOTDIR + return syserror.ENOTDIR } // Copy out to the return frame. - fd = kdefs.FD(ino.AddWatch(dirent, mask)) + fd = ino.AddWatch(dirent, mask) return nil }) @@ -123,7 +121,7 @@ func InotifyAddWatch(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kern // InotifyRmWatch implements the inotify_rm_watch() syscall. func InotifyRmWatch(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() wd := args[1].Int() ino, file, err := fdToInotify(t, fd) diff --git a/pkg/sentry/syscalls/linux/sys_lseek.go b/pkg/sentry/syscalls/linux/sys_lseek.go index 8aadc6d8c..297e920c4 100644 --- a/pkg/sentry/syscalls/linux/sys_lseek.go +++ b/pkg/sentry/syscalls/linux/sys_lseek.go @@ -15,20 +15,19 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) // Lseek implements linux syscall lseek(2). func Lseek(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() offset := args[1].Int64() whence := args[2].Int() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } diff --git a/pkg/sentry/syscalls/linux/sys_mempolicy.go b/pkg/sentry/syscalls/linux/sys_mempolicy.go index 652b2c206..f5a519d8a 100644 --- a/pkg/sentry/syscalls/linux/sys_mempolicy.go +++ b/pkg/sentry/syscalls/linux/sys_mempolicy.go @@ -17,11 +17,11 @@ package linux import ( "fmt" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // We unconditionally report a single NUMA node. This also means that our diff --git a/pkg/sentry/syscalls/linux/sys_mmap.go b/pkg/sentry/syscalls/linux/sys_mmap.go index 9926f0ac5..58a05b5bb 100644 --- a/pkg/sentry/syscalls/linux/sys_mmap.go +++ b/pkg/sentry/syscalls/linux/sys_mmap.go @@ -17,14 +17,13 @@ package linux import ( "bytes" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/memmap" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/memmap" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // Brk implements linux syscall brk(2). @@ -40,7 +39,7 @@ func Brk(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallCo func Mmap(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { prot := args[2].Int() flags := args[3].Int() - fd := kdefs.FD(args[4].Int()) + fd := args[4].Int() fixed := flags&linux.MAP_FIXED != 0 private := flags&linux.MAP_PRIVATE != 0 shared := flags&linux.MAP_SHARED != 0 @@ -80,7 +79,7 @@ func Mmap(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC if !anon { // Convert the passed FD to a file reference. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -180,6 +179,10 @@ func Madvise(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca switch adv { case linux.MADV_DONTNEED: return 0, nil, t.MemoryManager().Decommit(addr, length) + case linux.MADV_DOFORK: + return 0, nil, t.MemoryManager().SetDontFork(addr, length, false) + case linux.MADV_DONTFORK: + return 0, nil, t.MemoryManager().SetDontFork(addr, length, true) case linux.MADV_HUGEPAGE, linux.MADV_NOHUGEPAGE: fallthrough case linux.MADV_MERGEABLE, linux.MADV_UNMERGEABLE: @@ -191,7 +194,7 @@ func Madvise(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca case linux.MADV_NORMAL, linux.MADV_RANDOM, linux.MADV_SEQUENTIAL, linux.MADV_WILLNEED: // Do nothing, we totally ignore the suggestions above. return 0, nil, nil - case linux.MADV_REMOVE, linux.MADV_DOFORK, linux.MADV_DONTFORK: + case linux.MADV_REMOVE: // These "suggestions" have application-visible side effects, so we // have to indicate that we don't support them. return 0, nil, syserror.ENOSYS diff --git a/pkg/sentry/syscalls/linux/sys_mount.go b/pkg/sentry/syscalls/linux/sys_mount.go index cf613bad0..9080a10c3 100644 --- a/pkg/sentry/syscalls/linux/sys_mount.go +++ b/pkg/sentry/syscalls/linux/sys_mount.go @@ -15,12 +15,12 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // Mount implements Linux syscall mount(2). @@ -109,7 +109,7 @@ func Mount(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall return 0, nil, syserror.EINVAL } - return 0, nil, fileOpOn(t, linux.AT_FDCWD, targetPath, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error { + return 0, nil, fileOpOn(t, linux.AT_FDCWD, targetPath, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { return t.MountNamespace().Mount(t, d, rootInode) }) } @@ -140,7 +140,7 @@ func Umount2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca resolve := flags&linux.UMOUNT_NOFOLLOW != linux.UMOUNT_NOFOLLOW detachOnly := flags&linux.MNT_DETACH == linux.MNT_DETACH - return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, resolve, func(root *fs.Dirent, d *fs.Dirent) error { + return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, resolve, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { return t.MountNamespace().Unmount(t, d, detachOnly) }) } diff --git a/pkg/sentry/syscalls/linux/sys_pipe.go b/pkg/sentry/syscalls/linux/sys_pipe.go index 036845c13..418d7fa5f 100644 --- a/pkg/sentry/syscalls/linux/sys_pipe.go +++ b/pkg/sentry/syscalls/linux/sys_pipe.go @@ -15,20 +15,19 @@ package linux import ( - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/pipe" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // pipe2 implements the actual system call with flags. func pipe2(t *kernel.Task, addr usermem.Addr, flags uint) (uintptr, error) { if flags&^(linux.O_NONBLOCK|linux.O_CLOEXEC) != 0 { - return 0, syscall.EINVAL + return 0, syserror.EINVAL } r, w := pipe.NewConnectedPipe(t, pipe.DefaultPipeSize, usermem.PageSize) @@ -38,25 +37,18 @@ func pipe2(t *kernel.Task, addr usermem.Addr, flags uint) (uintptr, error) { w.SetFlags(linuxToFlags(flags).Settable()) defer w.DecRef() - rfd, err := t.FDMap().NewFDFrom(0, r, kernel.FDFlags{ - CloseOnExec: flags&linux.O_CLOEXEC != 0}, - t.ThreadGroup().Limits()) - if err != nil { - return 0, err - } - - wfd, err := t.FDMap().NewFDFrom(0, w, kernel.FDFlags{ - CloseOnExec: flags&linux.O_CLOEXEC != 0}, - t.ThreadGroup().Limits()) + fds, err := t.NewFDs(0, []*fs.File{r, w}, kernel.FDFlags{ + CloseOnExec: flags&linux.O_CLOEXEC != 0, + }) if err != nil { - t.FDMap().Remove(rfd) return 0, err } - if _, err := t.CopyOut(addr, []kdefs.FD{rfd, wfd}); err != nil { - t.FDMap().Remove(rfd) - t.FDMap().Remove(wfd) - return 0, syscall.EFAULT + if _, err := t.CopyOut(addr, fds); err != nil { + // The files are not closed in this case, the exact semantics + // of this error case are not well defined, but they could have + // already been observed by user space. + return 0, syserror.EFAULT } return 0, nil } diff --git a/pkg/sentry/syscalls/linux/sys_poll.go b/pkg/sentry/syscalls/linux/sys_poll.go index e32099dd4..7a13beac2 100644 --- a/pkg/sentry/syscalls/linux/sys_poll.go +++ b/pkg/sentry/syscalls/linux/sys_poll.go @@ -17,16 +17,15 @@ package linux import ( "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // fileCap is the maximum allowable files for poll & select. @@ -64,7 +63,7 @@ func initReadiness(t *kernel.Task, pfd *linux.PollFD, state *pollState, ch chan return } - file := t.FDMap().GetFile(kdefs.FD(pfd.FD)) + file := t.GetFile(pfd.FD) if file == nil { pfd.REvents = linux.POLLNVAL return @@ -265,7 +264,7 @@ func doSelect(t *kernel.Task, nfds int, readFDs, writeFDs, exceptFDs usermem.Add // immediately to ensure we don't leak. Note, another thread // might be about to close fd. This is racy, but that's // OK. Linux is racy in the same way. - file := t.FDMap().GetFile(kdefs.FD(fd)) + file := t.GetFile(fd) if file == nil { return 0, syserror.EBADF } diff --git a/pkg/sentry/syscalls/linux/sys_prctl.go b/pkg/sentry/syscalls/linux/sys_prctl.go index 1b7e5616b..98db32d77 100644 --- a/pkg/sentry/syscalls/linux/sys_prctl.go +++ b/pkg/sentry/syscalls/linux/sys_prctl.go @@ -16,15 +16,14 @@ package linux import ( "fmt" - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/mm" + + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/mm" + "gvisor.dev/gvisor/pkg/syserror" ) // Prctl implements linux syscall prctl(2). @@ -37,7 +36,7 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall case linux.PR_SET_PDEATHSIG: sig := linux.Signal(args[1].Int()) if sig != 0 && !sig.IsValid() { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } t.SetParentDeathSignal(sig) return 0, nil, nil @@ -68,7 +67,7 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall d = mm.UserDumpable default: // N.B. Userspace may not pass SUID_DUMP_ROOT. - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } t.MemoryManager().SetDumpability(d) return 0, nil, nil @@ -89,7 +88,7 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall } else if val == 1 { t.SetKeepCaps(true) } else { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } return 0, nil, nil @@ -97,7 +96,7 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall case linux.PR_SET_NAME: addr := args[1].Pointer() name, err := t.CopyInString(addr, linux.TASK_COMM_LEN-1) - if err != nil && err != syscall.ENAMETOOLONG { + if err != nil && err != syserror.ENAMETOOLONG { return 0, nil, err } t.SetName(name) @@ -117,22 +116,22 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall case linux.PR_SET_MM: if !t.HasCapability(linux.CAP_SYS_RESOURCE) { - return 0, nil, syscall.EPERM + return 0, nil, syserror.EPERM } switch args[1].Int() { case linux.PR_SET_MM_EXE_FILE: - fd := kdefs.FD(args[2].Int()) + fd := args[2].Int() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // They trying to set exe to a non-file? if !fs.IsFile(file.Dirent.Inode.StableAttr) { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } // Set the underlying executable. @@ -154,12 +153,12 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall t.Kernel().EmitUnimplementedEvent(t) fallthrough default: - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } case linux.PR_SET_NO_NEW_PRIVS: if args[1].Int() != 1 || args[2].Int() != 0 || args[3].Int() != 0 || args[4].Int() != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } // no_new_privs is assumed to always be set. See // kernel.Task.updateCredsForExec. @@ -167,14 +166,14 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall case linux.PR_GET_NO_NEW_PRIVS: if args[1].Int() != 0 || args[2].Int() != 0 || args[3].Int() != 0 || args[4].Int() != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } return 1, nil, nil case linux.PR_SET_SECCOMP: if args[1].Int() != linux.SECCOMP_MODE_FILTER { // Unsupported mode. - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } return 0, nil, seccomp(t, linux.SECCOMP_SET_MODE_FILTER, 0, args[2].Pointer()) @@ -185,7 +184,7 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall case linux.PR_CAPBSET_READ: cp := linux.Capability(args[1].Uint64()) if !cp.Ok() { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } var rv uintptr if auth.CapabilitySetOf(cp)&t.Credentials().BoundingCaps != 0 { @@ -196,7 +195,7 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall case linux.PR_CAPBSET_DROP: cp := linux.Capability(args[1].Uint64()) if !cp.Ok() { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } return 0, nil, t.DropBoundingCapability(cp) @@ -221,7 +220,7 @@ func Prctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall t.Kernel().EmitUnimplementedEvent(t) fallthrough default: - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } return 0, nil, nil diff --git a/pkg/sentry/syscalls/linux/sys_random.go b/pkg/sentry/syscalls/linux/sys_random.go index fc3959a7e..bc4c588bf 100644 --- a/pkg/sentry/syscalls/linux/sys_random.go +++ b/pkg/sentry/syscalls/linux/sys_random.go @@ -18,12 +18,12 @@ import ( "io" "math" - "gvisor.googlesource.com/gvisor/pkg/rand" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/rand" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) const ( diff --git a/pkg/sentry/syscalls/linux/sys_read.go b/pkg/sentry/syscalls/linux/sys_read.go index 48b0fd49d..b2474e60d 100644 --- a/pkg/sentry/syscalls/linux/sys_read.go +++ b/pkg/sentry/syscalls/linux/sys_read.go @@ -17,16 +17,15 @@ package linux import ( "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) const ( @@ -39,11 +38,11 @@ const ( // they can do large reads all at once. Bug for bug. Same for other read // calls below. func Read(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() size := args[2].SizeT() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -75,12 +74,12 @@ func Read(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC // Pread64 implements linux syscall pread64(2). func Pread64(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() size := args[2].SizeT() offset := args[3].Int64() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -122,11 +121,11 @@ func Pread64(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca // Readv implements linux syscall readv(2). func Readv(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() iovcnt := int(args[2].Int()) - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -152,12 +151,12 @@ func Readv(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // Preadv implements linux syscall preadv(2). func Preadv(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() iovcnt := int(args[2].Int()) offset := args[3].Int64() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -201,13 +200,13 @@ func Preadv2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca // splits the offset argument into a high/low value for compatibility with // 32-bit architectures. The flags argument is the 5th argument. - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() iovcnt := int(args[2].Int()) offset := args[3].Int64() flags := int(args[5].Int()) - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } diff --git a/pkg/sentry/syscalls/linux/sys_rlimit.go b/pkg/sentry/syscalls/linux/sys_rlimit.go index 8b0379779..51e3f836b 100644 --- a/pkg/sentry/syscalls/linux/sys_rlimit.go +++ b/pkg/sentry/syscalls/linux/sys_rlimit.go @@ -15,12 +15,12 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/limits" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/limits" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // rlimit describes an implementation of 'struct rlimit', which may vary from diff --git a/pkg/sentry/syscalls/linux/sys_rusage.go b/pkg/sentry/syscalls/linux/sys_rusage.go index 003d718da..1674c7445 100644 --- a/pkg/sentry/syscalls/linux/sys_rusage.go +++ b/pkg/sentry/syscalls/linux/sys_rusage.go @@ -15,12 +15,12 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/syserror" ) func getrusage(t *kernel.Task, which int32) linux.Rusage { diff --git a/pkg/sentry/syscalls/linux/sys_sched.go b/pkg/sentry/syscalls/linux/sys_sched.go index 8aea03abe..99f6993f5 100644 --- a/pkg/sentry/syscalls/linux/sys_sched.go +++ b/pkg/sentry/syscalls/linux/sys_sched.go @@ -15,11 +15,10 @@ package linux import ( - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) const ( @@ -37,13 +36,13 @@ func SchedGetparam(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel pid := args[0].Int() param := args[1].Pointer() if param == 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if pid < 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if pid != 0 && t.PIDNamespace().TaskWithID(kernel.ThreadID(pid)) == nil { - return 0, nil, syscall.ESRCH + return 0, nil, syserror.ESRCH } r := SchedParam{schedPriority: onlyPriority} if _, err := t.CopyOut(param, r); err != nil { @@ -57,10 +56,10 @@ func SchedGetparam(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel func SchedGetscheduler(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { pid := args[0].Int() if pid < 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if pid != 0 && t.PIDNamespace().TaskWithID(kernel.ThreadID(pid)) == nil { - return 0, nil, syscall.ESRCH + return 0, nil, syserror.ESRCH } return onlyScheduler, nil, nil } @@ -71,20 +70,20 @@ func SchedSetscheduler(t *kernel.Task, args arch.SyscallArguments) (uintptr, *ke policy := args[1].Int() param := args[2].Pointer() if pid < 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if policy != onlyScheduler { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if pid != 0 && t.PIDNamespace().TaskWithID(kernel.ThreadID(pid)) == nil { - return 0, nil, syscall.ESRCH + return 0, nil, syserror.ESRCH } var r SchedParam if _, err := t.CopyIn(param, &r); err != nil { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if r.schedPriority != onlyPriority { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } return 0, nil, nil } diff --git a/pkg/sentry/syscalls/linux/sys_seccomp.go b/pkg/sentry/syscalls/linux/sys_seccomp.go index b4262162a..18510ead8 100644 --- a/pkg/sentry/syscalls/linux/sys_seccomp.go +++ b/pkg/sentry/syscalls/linux/sys_seccomp.go @@ -15,13 +15,12 @@ package linux import ( - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/bpf" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/bpf" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // userSockFprog is equivalent to Linux's struct sock_fprog on amd64. @@ -43,7 +42,7 @@ func seccomp(t *kernel.Task, mode, flags uint64, addr usermem.Addr) error { // We only support SECCOMP_SET_MODE_FILTER at the moment. if mode != linux.SECCOMP_SET_MODE_FILTER { // Unsupported mode. - return syscall.EINVAL + return syserror.EINVAL } tsync := flags&linux.SECCOMP_FILTER_FLAG_TSYNC != 0 @@ -51,7 +50,7 @@ func seccomp(t *kernel.Task, mode, flags uint64, addr usermem.Addr) error { // The only flag we support now is SECCOMP_FILTER_FLAG_TSYNC. if flags&^linux.SECCOMP_FILTER_FLAG_TSYNC != 0 { // Unsupported flag. - return syscall.EINVAL + return syserror.EINVAL } var fprog userSockFprog @@ -65,7 +64,7 @@ func seccomp(t *kernel.Task, mode, flags uint64, addr usermem.Addr) error { compiledFilter, err := bpf.Compile(filter) if err != nil { t.Debugf("Invalid seccomp-bpf filter: %v", err) - return syscall.EINVAL + return syserror.EINVAL } return t.AppendSyscallFilter(compiledFilter, tsync) diff --git a/pkg/sentry/syscalls/linux/sys_sem.go b/pkg/sentry/syscalls/linux/sys_sem.go index 5bd61ab87..cde3b54e7 100644 --- a/pkg/sentry/syscalls/linux/sys_sem.go +++ b/pkg/sentry/syscalls/linux/sys_sem.go @@ -17,13 +17,13 @@ package linux import ( "math" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) const opsMax = 500 // SEMOPM diff --git a/pkg/sentry/syscalls/linux/sys_shm.go b/pkg/sentry/syscalls/linux/sys_shm.go index d0eceac7c..d57ffb3a1 100644 --- a/pkg/sentry/syscalls/linux/sys_shm.go +++ b/pkg/sentry/syscalls/linux/sys_shm.go @@ -15,11 +15,11 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/shm" + "gvisor.dev/gvisor/pkg/syserror" ) // Shmget implements shmget(2). diff --git a/pkg/sentry/syscalls/linux/sys_signal.go b/pkg/sentry/syscalls/linux/sys_signal.go index 7fbeb4fcd..0104a94c0 100644 --- a/pkg/sentry/syscalls/linux/sys_signal.go +++ b/pkg/sentry/syscalls/linux/sys_signal.go @@ -18,10 +18,10 @@ import ( "math" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) // "For a process to have permission to send a signal it must diff --git a/pkg/sentry/syscalls/linux/sys_socket.go b/pkg/sentry/syscalls/linux/sys_socket.go index 31295a6a9..195734257 100644 --- a/pkg/sentry/syscalls/linux/sys_socket.go +++ b/pkg/sentry/syscalls/linux/sys_socket.go @@ -15,21 +15,20 @@ package linux import ( - "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/control" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/socket/control" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserr" + "gvisor.dev/gvisor/pkg/syserror" ) // minListenBacklog is the minimum reasonable backlog for listening sockets. @@ -61,6 +60,8 @@ const controlLenOffset = 40 // to the Flags field. const flagsOffset = 48 +const sizeOfInt32 = 4 + // messageHeader64Len is the length of a MessageHeader64 struct. var messageHeader64Len = uint64(binary.Size(MessageHeader64{})) @@ -129,7 +130,7 @@ func CopyInMessageHeader64(t *kernel.Task, addr usermem.Addr, msg *MessageHeader // from the untrusted address space range. func CaptureAddress(t *kernel.Task, addr usermem.Addr, addrlen uint32) ([]byte, error) { if addrlen > maxAddrLen { - return nil, syscall.EINVAL + return nil, syserror.EINVAL } addrBuf := make([]byte, addrlen) @@ -151,7 +152,7 @@ func writeAddress(t *kernel.Task, addr interface{}, addrLen uint32, addrPtr user } if int32(bufLen) < 0 { - return syscall.EINVAL + return syserror.EINVAL } // Write the length unconditionally. @@ -184,7 +185,7 @@ func Socket(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Check and initialize the flags. if stype & ^(0xf|linux.SOCK_NONBLOCK|linux.SOCK_CLOEXEC) != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } // Create the new socket. @@ -197,9 +198,9 @@ func Socket(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal }) defer s.DecRef() - fd, err := t.FDMap().NewFDFrom(0, s, kernel.FDFlags{ + fd, err := t.NewFDFrom(0, s, kernel.FDFlags{ CloseOnExec: stype&linux.SOCK_CLOEXEC != 0, - }, t.ThreadGroup().Limits()) + }) if err != nil { return 0, nil, err } @@ -216,15 +217,12 @@ func SocketPair(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sy // Check and initialize the flags. if stype & ^(0xf|linux.SOCK_NONBLOCK|linux.SOCK_CLOEXEC) != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } fileFlags := fs.SettableFileFlags{ NonBlocking: stype&linux.SOCK_NONBLOCK != 0, } - fdFlags := kernel.FDFlags{ - CloseOnExec: stype&linux.SOCK_CLOEXEC != 0, - } // Create the socket pair. s1, s2, e := socket.Pair(t, domain, linux.SockType(stype&0xf), protocol) @@ -237,20 +235,16 @@ func SocketPair(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sy defer s2.DecRef() // Create the FDs for the sockets. - fd1, err := t.FDMap().NewFDFrom(0, s1, fdFlags, t.ThreadGroup().Limits()) - if err != nil { - return 0, nil, err - } - fd2, err := t.FDMap().NewFDFrom(0, s2, fdFlags, t.ThreadGroup().Limits()) + fds, err := t.NewFDs(0, []*fs.File{s1, s2}, kernel.FDFlags{ + CloseOnExec: stype&linux.SOCK_CLOEXEC != 0, + }) if err != nil { - t.FDMap().Remove(fd1) return 0, nil, err } // Copy the file descriptors out. - if _, err := t.CopyOut(socks, []int32{int32(fd1), int32(fd2)}); err != nil { - t.FDMap().Remove(fd1) - t.FDMap().Remove(fd2) + if _, err := t.CopyOut(socks, fds); err != nil { + // Note that we don't close files here; see pipe(2) also. return 0, nil, err } @@ -259,21 +253,21 @@ func SocketPair(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sy // Connect implements the linux syscall connect(2). func Connect(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() addrlen := args[2].Uint() // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Capture address and call syscall implementation. @@ -288,23 +282,23 @@ func Connect(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca // accept is the implementation of the accept syscall. It is called by accept // and accept4 syscall handlers. -func accept(t *kernel.Task, fd kdefs.FD, addr usermem.Addr, addrLen usermem.Addr, flags int) (uintptr, error) { +func accept(t *kernel.Task, fd int32, addr usermem.Addr, addrLen usermem.Addr, flags int) (uintptr, error) { // Check that no unsupported flags are passed in. if flags & ^(linux.SOCK_NONBLOCK|linux.SOCK_CLOEXEC) != 0 { - return 0, syscall.EINVAL + return 0, syserror.EINVAL } // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, syscall.EBADF + return 0, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, syscall.ENOTSOCK + return 0, syserror.ENOTSOCK } // Call the syscall implementation for this socket, then copy the @@ -319,7 +313,7 @@ func accept(t *kernel.Task, fd kdefs.FD, addr usermem.Addr, addrLen usermem.Addr if peerRequested { // NOTE(magi): Linux does not give you an error if it can't // write the data back out so neither do we. - if err := writeAddress(t, peer, peerLen, addr, addrLen); err == syscall.EINVAL { + if err := writeAddress(t, peer, peerLen, addr, addrLen); err == syserror.EINVAL { return 0, err } } @@ -328,7 +322,7 @@ func accept(t *kernel.Task, fd kdefs.FD, addr usermem.Addr, addrLen usermem.Addr // Accept4 implements the linux syscall accept4(2). func Accept4(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() addrlen := args[2].Pointer() flags := int(args[3].Int()) @@ -339,7 +333,7 @@ func Accept4(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca // Accept implements the linux syscall accept(2). func Accept(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() addrlen := args[2].Pointer() @@ -349,21 +343,21 @@ func Accept(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Bind implements the linux syscall bind(2). func Bind(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() addrlen := args[2].Uint() // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Capture address and call syscall implementation. @@ -377,20 +371,20 @@ func Bind(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC // Listen implements the linux syscall listen(2). func Listen(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() backlog := args[1].Int() // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Per Linux, the backlog is silently capped to reasonable values. @@ -406,27 +400,27 @@ func Listen(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Shutdown implements the linux syscall shutdown(2). func Shutdown(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() how := args[1].Int() // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Validate how, then call syscall implementation. switch how { case linux.SHUT_RD, linux.SHUT_WR, linux.SHUT_RDWR: default: - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } return 0, nil, s.Shutdown(t, int(how)).ToError() @@ -434,23 +428,23 @@ func Shutdown(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // GetSockOpt implements the linux syscall getsockopt(2). func GetSockOpt(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() level := args[1].Int() name := args[2].Int() optValAddr := args[3].Pointer() optLenAddr := args[4].Pointer() // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Read the length if present. Reject negative values. @@ -461,12 +455,12 @@ func GetSockOpt(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sy } if optLen < 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } } // Call syscall implementation then copy both value and value len out. - v, e := s.GetSockOpt(t, int(level), int(name), int(optLen)) + v, e := getSockOpt(t, s, int(level), int(name), int(optLen)) if e != nil { return 0, nil, e.ToError() } @@ -487,34 +481,61 @@ func GetSockOpt(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sy return 0, nil, nil } +// getSockOpt tries to handle common socket options, or dispatches to a specific +// socket implementation. +func getSockOpt(t *kernel.Task, s socket.Socket, level, name, len int) (interface{}, *syserr.Error) { + if level == linux.SOL_SOCKET { + switch name { + case linux.SO_TYPE, linux.SO_DOMAIN, linux.SO_PROTOCOL: + if len < sizeOfInt32 { + return nil, syserr.ErrInvalidArgument + } + } + + switch name { + case linux.SO_TYPE: + _, skType, _ := s.Type() + return int32(skType), nil + case linux.SO_DOMAIN: + family, _, _ := s.Type() + return int32(family), nil + case linux.SO_PROTOCOL: + _, _, protocol := s.Type() + return int32(protocol), nil + } + } + + return s.GetSockOpt(t, level, name, len) +} + // SetSockOpt implements the linux syscall setsockopt(2). // // Note that unlike Linux, enabling SO_PASSCRED does not autobind the socket. func SetSockOpt(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() level := args[1].Int() name := args[2].Int() optValAddr := args[3].Pointer() optLen := args[4].Int() // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } if optLen <= 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if optLen > maxOptLen { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } buf := t.CopyScratchBuffer(int(optLen)) if _, err := t.CopyIn(optValAddr, &buf); err != nil { @@ -531,21 +552,21 @@ func SetSockOpt(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sy // GetSockName implements the linux syscall getsockname(2). func GetSockName(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() addrlen := args[2].Pointer() // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Get the socket name and copy it to the caller. @@ -559,21 +580,21 @@ func GetSockName(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S // GetPeerName implements the linux syscall getpeername(2). func GetPeerName(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() addrlen := args[2].Pointer() // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Get the socket peer name and copy it to the caller. @@ -587,31 +608,31 @@ func GetPeerName(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S // RecvMsg implements the linux syscall recvmsg(2). func RecvMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() msgPtr := args[1].Pointer() flags := args[2].Int() if t.Arch().Width() != 8 { // We only handle 64-bit for now. - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Reject flags that we don't handle yet. if flags & ^(baseRecvFlags|linux.MSG_PEEK|linux.MSG_CMSG_CLOEXEC|linux.MSG_ERRQUEUE) != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if file.Flags().NonBlocking { @@ -633,7 +654,7 @@ func RecvMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca // RecvMMsg implements the linux syscall recvmmsg(2). func RecvMMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() msgPtr := args[1].Pointer() vlen := args[2].Uint() flags := args[3].Int() @@ -641,25 +662,25 @@ func RecvMMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc if t.Arch().Width() != 8 { // We only handle 64-bit for now. - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } // Reject flags that we don't handle yet. if flags & ^(baseRecvFlags|linux.MSG_CMSG_CLOEXEC|linux.MSG_ERRQUEUE) != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } if file.Flags().NonBlocking { @@ -674,7 +695,7 @@ func RecvMMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc return 0, nil, err } if !ts.Valid() { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } deadline = t.Kernel().MonotonicClock().Now().Add(ts.ToDuration()) haveDeadline = true @@ -694,7 +715,7 @@ func RecvMMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc for i := uint64(0); i < uint64(vlen); i++ { mp, ok := msgPtr.AddLength(i * multipleMessageHeader64Len) if !ok { - return 0, nil, syscall.EFAULT + return 0, nil, syserror.EFAULT } var n uintptr if n, err = recvSingleMsg(t, s, mp, flags, haveDeadline, deadline); err != nil { @@ -704,7 +725,7 @@ func RecvMMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // Copy the received length to the caller. lp, ok := mp.AddLength(messageHeader64Len) if !ok { - return 0, nil, syscall.EFAULT + return 0, nil, syserror.EFAULT } if _, err = t.CopyOut(lp, uint32(n)); err != nil { break @@ -726,7 +747,7 @@ func recvSingleMsg(t *kernel.Task, s socket.Socket, msgPtr usermem.Addr, flags i } if msg.IovLen > linux.UIO_MAXIOV { - return 0, syscall.EMSGSIZE + return 0, syserror.EMSGSIZE } dst, err := t.IovecsIOSequence(usermem.Addr(msg.Iov), int(msg.IovLen), usermem.IOOpts{ AddressSpaceActive: true, @@ -737,7 +758,7 @@ func recvSingleMsg(t *kernel.Task, s socket.Socket, msgPtr usermem.Addr, flags i // FIXME(b/63594852): Pretend we have an empty error queue. if flags&linux.MSG_ERRQUEUE != 0 { - return 0, syscall.EAGAIN + return 0, syserror.EAGAIN } // Fast path when no control message nor name buffers are provided. @@ -762,7 +783,7 @@ func recvSingleMsg(t *kernel.Task, s socket.Socket, msgPtr usermem.Addr, flags i } if msg.ControlLen > maxControlLen { - return 0, syscall.ENOBUFS + return 0, syserror.ENOBUFS } n, mflags, sender, senderLen, cms, e := s.RecvMsg(t, dst, int(flags), haveDeadline, deadline, msg.NameLen != 0, msg.ControlLen) if e != nil { @@ -812,27 +833,27 @@ func recvSingleMsg(t *kernel.Task, s socket.Socket, msgPtr usermem.Addr, flags i // recvFrom is the implementation of the recvfrom syscall. It is called by // recvfrom and recv syscall handlers. -func recvFrom(t *kernel.Task, fd kdefs.FD, bufPtr usermem.Addr, bufLen uint64, flags int32, namePtr usermem.Addr, nameLenPtr usermem.Addr) (uintptr, error) { +func recvFrom(t *kernel.Task, fd int32, bufPtr usermem.Addr, bufLen uint64, flags int32, namePtr usermem.Addr, nameLenPtr usermem.Addr) (uintptr, error) { if int(bufLen) < 0 { - return 0, syscall.EINVAL + return 0, syserror.EINVAL } // Reject flags that we don't handle yet. if flags & ^(baseRecvFlags|linux.MSG_PEEK|linux.MSG_CONFIRM) != 0 { - return 0, syscall.EINVAL + return 0, syserror.EINVAL } // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, syscall.EBADF + return 0, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, syscall.ENOTSOCK + return 0, syserror.ENOTSOCK } if file.Flags().NonBlocking { @@ -873,7 +894,7 @@ func recvFrom(t *kernel.Task, fd kdefs.FD, bufPtr usermem.Addr, bufLen uint64, f // RecvFrom implements the linux syscall recvfrom(2). func RecvFrom(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() bufPtr := args[1].Pointer() bufLen := args[2].Uint64() flags := args[3].Int() @@ -886,31 +907,31 @@ func RecvFrom(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // SendMsg implements the linux syscall sendmsg(2). func SendMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() msgPtr := args[1].Pointer() flags := args[2].Int() if t.Arch().Width() != 8 { // We only handle 64-bit for now. - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Reject flags that we don't handle yet. if flags & ^(linux.MSG_DONTWAIT|linux.MSG_EOR|linux.MSG_MORE|linux.MSG_NOSIGNAL) != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if file.Flags().NonBlocking { @@ -923,32 +944,32 @@ func SendMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca // SendMMsg implements the linux syscall sendmmsg(2). func SendMMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() msgPtr := args[1].Pointer() vlen := args[2].Uint() flags := args[3].Int() if t.Arch().Width() != 8 { // We only handle 64-bit for now. - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, nil, syscall.EBADF + return 0, nil, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, nil, syscall.ENOTSOCK + return 0, nil, syserror.ENOTSOCK } // Reject flags that we don't handle yet. if flags & ^(linux.MSG_DONTWAIT|linux.MSG_EOR|linux.MSG_MORE|linux.MSG_NOSIGNAL) != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if file.Flags().NonBlocking { @@ -960,7 +981,7 @@ func SendMMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc for i := uint64(0); i < uint64(vlen); i++ { mp, ok := msgPtr.AddLength(i * multipleMessageHeader64Len) if !ok { - return 0, nil, syscall.EFAULT + return 0, nil, syserror.EFAULT } var n uintptr if n, err = sendSingleMsg(t, s, file, mp, flags); err != nil { @@ -970,7 +991,7 @@ func SendMMsg(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // Copy the received length to the caller. lp, ok := mp.AddLength(messageHeader64Len) if !ok { - return 0, nil, syscall.EFAULT + return 0, nil, syserror.EFAULT } if _, err = t.CopyOut(lp, uint32(n)); err != nil { break @@ -995,7 +1016,7 @@ func sendSingleMsg(t *kernel.Task, s socket.Socket, file *fs.File, msgPtr userme if msg.ControlLen > 0 { // Put an upper bound to prevent large allocations. if msg.ControlLen > maxControlLen { - return 0, syscall.ENOBUFS + return 0, syserror.ENOBUFS } controlData = make([]byte, msg.ControlLen) if _, err := t.CopyIn(usermem.Addr(msg.Control), &controlData); err != nil { @@ -1015,7 +1036,7 @@ func sendSingleMsg(t *kernel.Task, s socket.Socket, file *fs.File, msgPtr userme // Read data then call the sendmsg implementation. if msg.IovLen > linux.UIO_MAXIOV { - return 0, syscall.EMSGSIZE + return 0, syserror.EMSGSIZE } src, err := t.IovecsIOSequence(usermem.Addr(msg.Iov), int(msg.IovLen), usermem.IOOpts{ AddressSpaceActive: true, @@ -1049,23 +1070,23 @@ func sendSingleMsg(t *kernel.Task, s socket.Socket, file *fs.File, msgPtr userme // sendTo is the implementation of the sendto syscall. It is called by sendto // and send syscall handlers. -func sendTo(t *kernel.Task, fd kdefs.FD, bufPtr usermem.Addr, bufLen uint64, flags int32, namePtr usermem.Addr, nameLen uint32) (uintptr, error) { +func sendTo(t *kernel.Task, fd int32, bufPtr usermem.Addr, bufLen uint64, flags int32, namePtr usermem.Addr, nameLen uint32) (uintptr, error) { bl := int(bufLen) if bl < 0 { - return 0, syscall.EINVAL + return 0, syserror.EINVAL } // Get socket from the file descriptor. - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { - return 0, syscall.EBADF + return 0, syserror.EBADF } defer file.DecRef() // Extract the socket. s, ok := file.FileOperations.(socket.Socket) if !ok { - return 0, syscall.ENOTSOCK + return 0, syserror.ENOTSOCK } if file.Flags().NonBlocking { @@ -1105,7 +1126,7 @@ func sendTo(t *kernel.Task, fd kdefs.FD, bufPtr usermem.Addr, bufLen uint64, fla // SendTo implements the linux syscall sendto(2). func SendTo(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() bufPtr := args[1].Pointer() bufLen := args[2].Uint64() flags := args[3].Int() diff --git a/pkg/sentry/syscalls/linux/sys_splice.go b/pkg/sentry/syscalls/linux/sys_splice.go index 37303606f..a7c98efcb 100644 --- a/pkg/sentry/syscalls/linux/sys_splice.go +++ b/pkg/sentry/syscalls/linux/sys_splice.go @@ -15,13 +15,12 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) // doSplice implements a blocking splice operation. @@ -48,12 +47,12 @@ func doSplice(t *kernel.Task, outFile, inFile *fs.File, opts fs.SpliceOpts, nonB if ch == nil { ch = make(chan struct{}, 1) } - if !inW && inFile.Readiness(EventMaskRead) == 0 && !inFile.Flags().NonBlocking { + if !inW && !inFile.Flags().NonBlocking { w, _ := waiter.NewChannelEntry(ch) inFile.EventRegister(&w, EventMaskRead) defer inFile.EventUnregister(&w) inW = true // Registered. - } else if !outW && outFile.Readiness(EventMaskWrite) == 0 && !outFile.Flags().NonBlocking { + } else if !outW && !outFile.Flags().NonBlocking { w, _ := waiter.NewChannelEntry(ch) outFile.EventRegister(&w, EventMaskWrite) defer outFile.EventUnregister(&w) @@ -65,6 +64,11 @@ func doSplice(t *kernel.Task, outFile, inFile *fs.File, opts fs.SpliceOpts, nonB break } + if (!inW || inFile.Readiness(EventMaskRead) != 0) && (!outW || outFile.Readiness(EventMaskWrite) != 0) { + // Something became ready, try again without blocking. + continue + } + // Block until there's data. if err = t.Block(ch); err != nil { break @@ -76,8 +80,8 @@ func doSplice(t *kernel.Task, outFile, inFile *fs.File, opts fs.SpliceOpts, nonB // Sendfile implements linux system call sendfile(2). func Sendfile(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - outFD := kdefs.FD(args[0].Int()) - inFD := kdefs.FD(args[1].Int()) + outFD := args[0].Int() + inFD := args[1].Int() offsetAddr := args[2].Pointer() count := int64(args[3].SizeT()) @@ -87,13 +91,13 @@ func Sendfile(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc } // Get files. - outFile := t.FDMap().GetFile(outFD) + outFile := t.GetFile(outFD) if outFile == nil { return 0, nil, syserror.EBADF } defer outFile.DecRef() - inFile := t.FDMap().GetFile(inFD) + inFile := t.GetFile(inFD) if inFile == nil { return 0, nil, syserror.EBADF } @@ -158,9 +162,9 @@ func Sendfile(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // Splice implements splice(2). func Splice(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - inFD := kdefs.FD(args[0].Int()) + inFD := args[0].Int() inOffset := args[1].Pointer() - outFD := kdefs.FD(args[2].Int()) + outFD := args[2].Int() outOffset := args[3].Pointer() count := int64(args[4].SizeT()) flags := args[5].Int() @@ -177,13 +181,13 @@ func Splice(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal nonBlocking := (flags & linux.SPLICE_F_NONBLOCK) != 0 // Get files. - outFile := t.FDMap().GetFile(outFD) + outFile := t.GetFile(outFD) if outFile == nil { return 0, nil, syserror.EBADF } defer outFile.DecRef() - inFile := t.FDMap().GetFile(inFD) + inFile := t.GetFile(inFD) if inFile == nil { return 0, nil, syserror.EBADF } @@ -246,8 +250,8 @@ func Splice(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Tee imlements tee(2). func Tee(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - inFD := kdefs.FD(args[0].Int()) - outFD := kdefs.FD(args[1].Int()) + inFD := args[0].Int() + outFD := args[1].Int() count := int64(args[2].SizeT()) flags := args[3].Int() @@ -260,13 +264,13 @@ func Tee(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallCo nonBlocking := (flags & linux.SPLICE_F_NONBLOCK) != 0 // Get files. - outFile := t.FDMap().GetFile(outFD) + outFile := t.GetFile(outFD) if outFile == nil { return 0, nil, syserror.EBADF } defer outFile.DecRef() - inFile := t.FDMap().GetFile(inFD) + inFile := t.GetFile(inFD) if inFile == nil { return 0, nil, syserror.EBADF } diff --git a/pkg/sentry/syscalls/linux/sys_stat.go b/pkg/sentry/syscalls/linux/sys_stat.go index 10fc201ef..5556bc276 100644 --- a/pkg/sentry/syscalls/linux/sys_stat.go +++ b/pkg/sentry/syscalls/linux/sys_stat.go @@ -15,14 +15,13 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // Stat implements linux syscall stat(2). @@ -35,14 +34,14 @@ func Stat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC return 0, nil, err } - return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error { + return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { return stat(t, d, dirPath, statAddr) }) } // Fstatat implements linux syscall newfstatat, i.e. fstatat(2). func Fstatat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() statAddr := args[2].Pointer() flags := args[3].Int() @@ -54,7 +53,7 @@ func Fstatat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca if path == "" { // Annoying. What's wrong with fstat? - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -67,7 +66,7 @@ func Fstatat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysca // then we must resolve the final component. resolve := dirPath || flags&linux.AT_SYMLINK_NOFOLLOW == 0 - return 0, nil, fileOpOn(t, fd, path, resolve, func(root *fs.Dirent, d *fs.Dirent) error { + return 0, nil, fileOpOn(t, fd, path, resolve, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { return stat(t, d, dirPath, statAddr) }) } @@ -86,17 +85,17 @@ func Lstat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // want to resolve the final component. resolve := dirPath - return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, resolve, func(root *fs.Dirent, d *fs.Dirent) error { + return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, resolve, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { return stat(t, d, dirPath, statAddr) }) } // Fstat implements linux syscall fstat(2). func Fstat(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() statAddr := args[1].Pointer() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -132,24 +131,6 @@ func fstat(t *kernel.Task, f *fs.File, statAddr usermem.Addr) error { // t.CopyObjectOut has noticeable performance impact due to its many slice // allocations and use of reflection. func copyOutStat(t *kernel.Task, dst usermem.Addr, sattr fs.StableAttr, uattr fs.UnstableAttr) error { - var mode uint32 - switch sattr.Type { - case fs.RegularFile, fs.SpecialFile: - mode |= linux.ModeRegular - case fs.Symlink: - mode |= linux.ModeSymlink - case fs.Directory, fs.SpecialDirectory: - mode |= linux.ModeDirectory - case fs.Pipe: - mode |= linux.ModeNamedPipe - case fs.CharacterDevice: - mode |= linux.ModeCharacterDevice - case fs.BlockDevice: - mode |= linux.ModeBlockDevice - case fs.Socket: - mode |= linux.ModeSocket - } - b := t.CopyScratchBuffer(int(linux.SizeOfStat))[:0] // Dev (uint64) @@ -159,7 +140,7 @@ func copyOutStat(t *kernel.Task, dst usermem.Addr, sattr fs.StableAttr, uattr fs // Nlink (uint64) b = binary.AppendUint64(b, usermem.ByteOrder, uattr.Links) // Mode (uint32) - b = binary.AppendUint32(b, usermem.ByteOrder, mode|uint32(uattr.Perms.LinuxMode())) + b = binary.AppendUint32(b, usermem.ByteOrder, sattr.Type.LinuxType()|uint32(uattr.Perms.LinuxMode())) // UID (uint32) b = binary.AppendUint32(b, usermem.ByteOrder, uint32(uattr.Owner.UID.In(t.UserNamespace()).OrOverflow())) // GID (uint32) @@ -194,6 +175,98 @@ func copyOutStat(t *kernel.Task, dst usermem.Addr, sattr fs.StableAttr, uattr fs return err } +// Statx implements linux syscall statx(2). +func Statx(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { + fd := args[0].Int() + pathAddr := args[1].Pointer() + flags := args[2].Int() + mask := args[3].Uint() + statxAddr := args[4].Pointer() + + if mask&linux.STATX__RESERVED > 0 { + return 0, nil, syserror.EINVAL + } + if flags&linux.AT_STATX_SYNC_TYPE == linux.AT_STATX_SYNC_TYPE { + return 0, nil, syserror.EINVAL + } + + path, dirPath, err := copyInPath(t, pathAddr, flags&linux.AT_EMPTY_PATH != 0) + if err != nil { + return 0, nil, err + } + + if path == "" { + file := t.GetFile(fd) + if file == nil { + return 0, nil, syserror.EBADF + } + defer file.DecRef() + uattr, err := file.UnstableAttr(t) + if err != nil { + return 0, nil, err + } + return 0, nil, statx(t, file.Dirent.Inode.StableAttr, uattr, statxAddr) + } + + resolve := dirPath || flags&linux.AT_SYMLINK_NOFOLLOW == 0 + + return 0, nil, fileOpOn(t, fd, path, resolve, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { + if dirPath && !fs.IsDir(d.Inode.StableAttr) { + return syserror.ENOTDIR + } + uattr, err := d.Inode.UnstableAttr(t) + if err != nil { + return err + } + return statx(t, d.Inode.StableAttr, uattr, statxAddr) + }) +} + +func statx(t *kernel.Task, sattr fs.StableAttr, uattr fs.UnstableAttr, statxAddr usermem.Addr) error { + // "[T]he kernel may return fields that weren't requested and may fail to + // return fields that were requested, depending on what the backing + // filesystem supports. + // [...] + // A filesystem may also fill in fields that the caller didn't ask for + // if it has values for them available and the information is available + // at no extra cost. If this happens, the corresponding bits will be + // set in stx_mask." -- statx(2) + // + // We fill in all the values we have (which currently does not include + // btime, see b/135608823), regardless of what the user asked for. The + // STATX_BASIC_STATS mask indicates that all fields are present except + // for btime. + + devMajor, devMinor := linux.DecodeDeviceID(uint32(sattr.DeviceID)) + s := linux.Statx{ + // TODO(b/135608823): Support btime, and then change this to + // STATX_ALL to indicate presence of btime. + Mask: linux.STATX_BASIC_STATS, + + // No attributes, and none supported. + Attributes: 0, + AttributesMask: 0, + + Blksize: uint32(sattr.BlockSize), + Nlink: uint32(uattr.Links), + UID: uint32(uattr.Owner.UID.In(t.UserNamespace()).OrOverflow()), + GID: uint32(uattr.Owner.GID.In(t.UserNamespace()).OrOverflow()), + Mode: uint16(sattr.Type.LinuxType()) | uint16(uattr.Perms.LinuxMode()), + Ino: sattr.InodeID, + Size: uint64(uattr.Size), + Blocks: uint64(uattr.Usage) / 512, + Atime: uattr.AccessTime.StatxTimestamp(), + Ctime: uattr.StatusChangeTime.StatxTimestamp(), + Mtime: uattr.ModificationTime.StatxTimestamp(), + RdevMajor: uint32(sattr.DeviceFileMajor), + RdevMinor: sattr.DeviceFileMinor, + DevMajor: uint32(devMajor), + DevMinor: devMinor, + } + _, err := t.CopyOut(statxAddr, &s) + return err +} + // Statfs implements linux syscall statfs(2). func Statfs(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { addr := args[0].Pointer() @@ -204,17 +277,17 @@ func Statfs(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal return 0, nil, err } - return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent) error { + return 0, nil, fileOpOn(t, linux.AT_FDCWD, path, true /* resolve */, func(root *fs.Dirent, d *fs.Dirent, _ uint) error { return statfsImpl(t, d, statfsAddr) }) } // Fstatfs implements linux syscall fstatfs(2). func Fstatfs(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() statfsAddr := args[1].Pointer() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -252,8 +325,6 @@ func statfsImpl(t *kernel.Task, d *fs.Dirent, addr usermem.Addr) error { FragmentSize: d.Inode.StableAttr.BlockSize, // Leave other fields 0 like simple_statfs does. } - if _, err := t.CopyOut(addr, &statfs); err != nil { - return err - } - return nil + _, err = t.CopyOut(addr, &statfs) + return err } diff --git a/pkg/sentry/syscalls/linux/sys_sync.go b/pkg/sentry/syscalls/linux/sys_sync.go index 4352482fb..3e55235bd 100644 --- a/pkg/sentry/syscalls/linux/sys_sync.go +++ b/pkg/sentry/syscalls/linux/sys_sync.go @@ -15,12 +15,11 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) // Sync implements linux system call sync(2). @@ -32,9 +31,9 @@ func Sync(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC // Syncfs implements linux system call syncfs(2). func Syncfs(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -47,9 +46,9 @@ func Syncfs(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Fsync implements linux syscall fsync(2). func Fsync(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -63,9 +62,9 @@ func Fsync(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // // At the moment, it just calls Fsync, which is a big hammer, but correct. func Fdatasync(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -79,6 +78,7 @@ func Fdatasync(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys func SyncFileRange(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { var err error + fd := args[0].Int() offset := args[1].Int64() nbytes := args[2].Int64() uflags := args[3].Uint() @@ -97,8 +97,7 @@ func SyncFileRange(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel nbytes = fs.FileMaxOffset } - fd := kdefs.FD(args[0].Int()) - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } diff --git a/pkg/sentry/syscalls/linux/sys_sysinfo.go b/pkg/sentry/syscalls/linux/sys_sysinfo.go index ecf88edc1..a65b560c8 100644 --- a/pkg/sentry/syscalls/linux/sys_sysinfo.go +++ b/pkg/sentry/syscalls/linux/sys_sysinfo.go @@ -15,10 +15,10 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usage" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usage" ) // Sysinfo implements the sysinfo syscall as described in man 2 sysinfo. diff --git a/pkg/sentry/syscalls/linux/sys_syslog.go b/pkg/sentry/syscalls/linux/sys_syslog.go index 9efc58d34..40c8bb061 100644 --- a/pkg/sentry/syscalls/linux/sys_syslog.go +++ b/pkg/sentry/syscalls/linux/sys_syslog.go @@ -15,9 +15,9 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) const ( diff --git a/pkg/sentry/syscalls/linux/sys_thread.go b/pkg/sentry/syscalls/linux/sys_thread.go index 26f7e8ead..595eb9155 100644 --- a/pkg/sentry/syscalls/linux/sys_thread.go +++ b/pkg/sentry/syscalls/linux/sys_thread.go @@ -17,12 +17,12 @@ package linux import ( "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/sched" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/sched" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) const ( @@ -123,29 +123,29 @@ func ExitGroup(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys func clone(t *kernel.Task, flags int, stack usermem.Addr, parentTID usermem.Addr, childTID usermem.Addr, tls usermem.Addr) (uintptr, *kernel.SyscallControl, error) { opts := kernel.CloneOptions{ SharingOptions: kernel.SharingOptions{ - NewAddressSpace: flags&syscall.CLONE_VM == 0, - NewSignalHandlers: flags&syscall.CLONE_SIGHAND == 0, - NewThreadGroup: flags&syscall.CLONE_THREAD == 0, + NewAddressSpace: flags&linux.CLONE_VM == 0, + NewSignalHandlers: flags&linux.CLONE_SIGHAND == 0, + NewThreadGroup: flags&linux.CLONE_THREAD == 0, TerminationSignal: linux.Signal(flags & exitSignalMask), - NewPIDNamespace: flags&syscall.CLONE_NEWPID == syscall.CLONE_NEWPID, - NewUserNamespace: flags&syscall.CLONE_NEWUSER == syscall.CLONE_NEWUSER, - NewNetworkNamespace: flags&syscall.CLONE_NEWNET == syscall.CLONE_NEWNET, - NewFiles: flags&syscall.CLONE_FILES == 0, - NewFSContext: flags&syscall.CLONE_FS == 0, - NewUTSNamespace: flags&syscall.CLONE_NEWUTS == syscall.CLONE_NEWUTS, - NewIPCNamespace: flags&syscall.CLONE_NEWIPC == syscall.CLONE_NEWIPC, + NewPIDNamespace: flags&linux.CLONE_NEWPID == linux.CLONE_NEWPID, + NewUserNamespace: flags&linux.CLONE_NEWUSER == linux.CLONE_NEWUSER, + NewNetworkNamespace: flags&linux.CLONE_NEWNET == linux.CLONE_NEWNET, + NewFiles: flags&linux.CLONE_FILES == 0, + NewFSContext: flags&linux.CLONE_FS == 0, + NewUTSNamespace: flags&linux.CLONE_NEWUTS == linux.CLONE_NEWUTS, + NewIPCNamespace: flags&linux.CLONE_NEWIPC == linux.CLONE_NEWIPC, }, Stack: stack, - SetTLS: flags&syscall.CLONE_SETTLS == syscall.CLONE_SETTLS, + SetTLS: flags&linux.CLONE_SETTLS == linux.CLONE_SETTLS, TLS: tls, - ChildClearTID: flags&syscall.CLONE_CHILD_CLEARTID == syscall.CLONE_CHILD_CLEARTID, - ChildSetTID: flags&syscall.CLONE_CHILD_SETTID == syscall.CLONE_CHILD_SETTID, + ChildClearTID: flags&linux.CLONE_CHILD_CLEARTID == linux.CLONE_CHILD_CLEARTID, + ChildSetTID: flags&linux.CLONE_CHILD_SETTID == linux.CLONE_CHILD_SETTID, ChildTID: childTID, - ParentSetTID: flags&syscall.CLONE_PARENT_SETTID == syscall.CLONE_PARENT_SETTID, + ParentSetTID: flags&linux.CLONE_PARENT_SETTID == linux.CLONE_PARENT_SETTID, ParentTID: parentTID, - Vfork: flags&syscall.CLONE_VFORK == syscall.CLONE_VFORK, - Untraced: flags&syscall.CLONE_UNTRACED == syscall.CLONE_UNTRACED, - InheritTracer: flags&syscall.CLONE_PTRACE == syscall.CLONE_PTRACE, + Vfork: flags&linux.CLONE_VFORK == linux.CLONE_VFORK, + Untraced: flags&linux.CLONE_UNTRACED == linux.CLONE_UNTRACED, + InheritTracer: flags&linux.CLONE_PTRACE == linux.CLONE_PTRACE, } ntid, ctrl, err := t.Clone(&opts) return uintptr(ntid), ctrl, err @@ -168,7 +168,7 @@ func Clone(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall func Fork(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { // "A call to fork() is equivalent to a call to clone(2) specifying flags // as just SIGCHLD." - fork(2) - return clone(t, int(syscall.SIGCHLD), 0, 0, 0, 0) + return clone(t, int(linux.SIGCHLD), 0, 0, 0, 0) } // Vfork implements Linux syscall vfork(2). @@ -178,7 +178,7 @@ func Vfork(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // // CLONE_VM | CLONE_VFORK | SIGCHLD // """ - vfork(2) - return clone(t, syscall.CLONE_VM|syscall.CLONE_VFORK|int(syscall.SIGCHLD), 0, 0, 0, 0) + return clone(t, linux.CLONE_VM|linux.CLONE_VFORK|int(linux.SIGCHLD), 0, 0, 0, 0) } // parseCommonWaitOptions applies the options common to wait4 and waitid to @@ -193,7 +193,7 @@ func parseCommonWaitOptions(wopts *kernel.WaitOptions, options int) error { wopts.NonCloneTasks = true wopts.CloneTasks = true default: - return syscall.EINVAL + return syserror.EINVAL } if options&linux.WCONTINUED != 0 { wopts.Events |= kernel.EventGroupContinue @@ -210,7 +210,7 @@ func parseCommonWaitOptions(wopts *kernel.WaitOptions, options int) error { // wait4 waits for the given child process to exit. func wait4(t *kernel.Task, pid int, statusAddr usermem.Addr, options int, rusageAddr usermem.Addr) (uintptr, error) { if options&^(linux.WNOHANG|linux.WUNTRACED|linux.WCONTINUED|linux.WNOTHREAD|linux.WALL|linux.WCLONE) != 0 { - return 0, syscall.EINVAL + return 0, syserror.EINVAL } wopts := kernel.WaitOptions{ Events: kernel.EventExit | kernel.EventTraceeStop, @@ -291,10 +291,10 @@ func Waitid(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal rusageAddr := args[4].Pointer() if options&^(linux.WNOHANG|linux.WEXITED|linux.WSTOPPED|linux.WCONTINUED|linux.WNOWAIT|linux.WNOTHREAD|linux.WALL|linux.WCLONE) != 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if options&(linux.WEXITED|linux.WSTOPPED|linux.WCONTINUED) == 0 { - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } wopts := kernel.WaitOptions{ Events: kernel.EventTraceeStop, @@ -307,7 +307,7 @@ func Waitid(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal case linux.P_PGID: wopts.SpecificPGID = kernel.ProcessGroupID(id) default: - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } if err := parseCommonWaitOptions(&wopts, options); err != nil { @@ -347,12 +347,12 @@ func Waitid(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal return 0, nil, nil } si := arch.SignalInfo{ - Signo: int32(syscall.SIGCHLD), + Signo: int32(linux.SIGCHLD), } si.SetPid(int32(wr.TID)) si.SetUid(int32(wr.UID)) // TODO(b/73541790): convert kernel.ExitStatus to functions and make - // WaitResult.Status a linux.WaitStatus + // WaitResult.Status a linux.WaitStatus. s := syscall.WaitStatus(wr.Status) switch { case s.Exited(): @@ -374,7 +374,7 @@ func Waitid(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal } case s.Continued(): si.Code = arch.CLD_CONTINUED - si.SetStatus(int32(syscall.SIGCONT)) + si.SetStatus(int32(linux.SIGCONT)) default: t.Warningf("waitid got incomprehensible wait status %d", s) } @@ -395,16 +395,16 @@ func SetTidAddress(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel func Unshare(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { flags := args[0].Int() opts := kernel.SharingOptions{ - NewAddressSpace: flags&syscall.CLONE_VM == syscall.CLONE_VM, - NewSignalHandlers: flags&syscall.CLONE_SIGHAND == syscall.CLONE_SIGHAND, - NewThreadGroup: flags&syscall.CLONE_THREAD == syscall.CLONE_THREAD, - NewPIDNamespace: flags&syscall.CLONE_NEWPID == syscall.CLONE_NEWPID, - NewUserNamespace: flags&syscall.CLONE_NEWUSER == syscall.CLONE_NEWUSER, - NewNetworkNamespace: flags&syscall.CLONE_NEWNET == syscall.CLONE_NEWNET, - NewFiles: flags&syscall.CLONE_FILES == syscall.CLONE_FILES, - NewFSContext: flags&syscall.CLONE_FS == syscall.CLONE_FS, - NewUTSNamespace: flags&syscall.CLONE_NEWUTS == syscall.CLONE_NEWUTS, - NewIPCNamespace: flags&syscall.CLONE_NEWIPC == syscall.CLONE_NEWIPC, + NewAddressSpace: flags&linux.CLONE_VM == linux.CLONE_VM, + NewSignalHandlers: flags&linux.CLONE_SIGHAND == linux.CLONE_SIGHAND, + NewThreadGroup: flags&linux.CLONE_THREAD == linux.CLONE_THREAD, + NewPIDNamespace: flags&linux.CLONE_NEWPID == linux.CLONE_NEWPID, + NewUserNamespace: flags&linux.CLONE_NEWUSER == linux.CLONE_NEWUSER, + NewNetworkNamespace: flags&linux.CLONE_NEWNET == linux.CLONE_NEWNET, + NewFiles: flags&linux.CLONE_FILES == linux.CLONE_FILES, + NewFSContext: flags&linux.CLONE_FS == linux.CLONE_FS, + NewUTSNamespace: flags&linux.CLONE_NEWUTS == linux.CLONE_NEWUTS, + NewIPCNamespace: flags&linux.CLONE_NEWIPC == linux.CLONE_NEWIPC, } // "CLONE_NEWPID automatically implies CLONE_THREAD as well." - unshare(2) if opts.NewPIDNamespace { @@ -623,7 +623,7 @@ func Getpriority(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S who := kernel.ThreadID(args[1].Int()) switch which { - case syscall.PRIO_PROCESS: + case linux.PRIO_PROCESS: // Look for who, return ESRCH if not found. var task *kernel.Task if who == 0 { @@ -633,7 +633,7 @@ func Getpriority(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S } if task == nil { - return 0, nil, syscall.ESRCH + return 0, nil, syserror.ESRCH } // From kernel/sys.c:getpriority: @@ -641,13 +641,13 @@ func Getpriority(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S // will not return the normal nice-value, but a negated // value that has been offset by 20" return uintptr(20 - task.Niceness()), nil, nil - case syscall.PRIO_USER: + case linux.PRIO_USER: fallthrough - case syscall.PRIO_PGRP: + case linux.PRIO_PGRP: // PRIO_USER and PRIO_PGRP have no further implementation yet. return 0, nil, nil default: - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } } @@ -669,7 +669,7 @@ func Setpriority(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S } switch which { - case syscall.PRIO_PROCESS: + case linux.PRIO_PROCESS: // Look for who, return ESRCH if not found. var task *kernel.Task if who == 0 { @@ -679,17 +679,17 @@ func Setpriority(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S } if task == nil { - return 0, nil, syscall.ESRCH + return 0, nil, syserror.ESRCH } task.SetNiceness(niceval) - case syscall.PRIO_USER: + case linux.PRIO_USER: fallthrough - case syscall.PRIO_PGRP: + case linux.PRIO_PGRP: // PRIO_USER and PRIO_PGRP have no further implementation yet. return 0, nil, nil default: - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } return 0, nil, nil diff --git a/pkg/sentry/syscalls/linux/sys_time.go b/pkg/sentry/syscalls/linux/sys_time.go index b4f2609c0..fe8725191 100644 --- a/pkg/sentry/syscalls/linux/sys_time.go +++ b/pkg/sentry/syscalls/linux/sys_time.go @@ -17,12 +17,12 @@ package linux import ( "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // The most significant 29 bits hold either a pid or a file descriptor. diff --git a/pkg/sentry/syscalls/linux/sys_timer.go b/pkg/sentry/syscalls/linux/sys_timer.go index 04ea7a4e9..d4134207b 100644 --- a/pkg/sentry/syscalls/linux/sys_timer.go +++ b/pkg/sentry/syscalls/linux/sys_timer.go @@ -15,13 +15,13 @@ package linux import ( - "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) const nsecPerSec = int64(time.Second) @@ -47,7 +47,7 @@ func copyItimerValIn(t *kernel.Task, addr usermem.Addr) (linux.ItimerVal, error) return itv, nil default: - return linux.ItimerVal{}, syscall.ENOSYS + return linux.ItimerVal{}, syserror.ENOSYS } } @@ -65,7 +65,7 @@ func copyItimerValOut(t *kernel.Task, addr usermem.Addr, itv *linux.ItimerVal) e _, err := t.CopyOut(addr, itv) return err default: - return syscall.ENOSYS + return syserror.ENOSYS } } diff --git a/pkg/sentry/syscalls/linux/sys_timerfd.go b/pkg/sentry/syscalls/linux/sys_timerfd.go index ec0155cbb..1ce5ce4c3 100644 --- a/pkg/sentry/syscalls/linux/sys_timerfd.go +++ b/pkg/sentry/syscalls/linux/sys_timerfd.go @@ -15,14 +15,13 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs/timerfd" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/fs/timerfd" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/syserror" ) // TimerfdCreate implements Linux syscall timerfd_create(2). @@ -49,9 +48,9 @@ func TimerfdCreate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel NonBlocking: flags&linux.TFD_NONBLOCK != 0, }) - fd, err := t.FDMap().NewFDFrom(0, f, kernel.FDFlags{ + fd, err := t.NewFDFrom(0, f, kernel.FDFlags{ CloseOnExec: flags&linux.TFD_CLOEXEC != 0, - }, t.ThreadGroup().Limits()) + }) if err != nil { return 0, nil, err } @@ -61,7 +60,7 @@ func TimerfdCreate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel // TimerfdSettime implements Linux syscall timerfd_settime(2). func TimerfdSettime(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() flags := args[1].Int() newValAddr := args[2].Pointer() oldValAddr := args[3].Pointer() @@ -70,7 +69,7 @@ func TimerfdSettime(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kerne return 0, nil, syserror.EINVAL } - f := t.FDMap().GetFile(fd) + f := t.GetFile(fd) if f == nil { return 0, nil, syserror.EBADF } @@ -101,10 +100,10 @@ func TimerfdSettime(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kerne // TimerfdGettime implements Linux syscall timerfd_gettime(2). func TimerfdGettime(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() curValAddr := args[1].Pointer() - f := t.FDMap().GetFile(fd) + f := t.GetFile(fd) if f == nil { return 0, nil, syserror.EBADF } diff --git a/pkg/sentry/syscalls/linux/sys_tls.go b/pkg/sentry/syscalls/linux/sys_tls.go index 1e8312e00..b3eb96a1c 100644 --- a/pkg/sentry/syscalls/linux/sys_tls.go +++ b/pkg/sentry/syscalls/linux/sys_tls.go @@ -17,11 +17,10 @@ package linux import ( - "syscall" - - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) // ArchPrctl implements linux syscall arch_prctl(2). @@ -39,14 +38,14 @@ func ArchPrctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys case linux.ARCH_SET_FS: fsbase := args[1].Uint64() if !t.Arch().SetTLS(uintptr(fsbase)) { - return 0, nil, syscall.EPERM + return 0, nil, syserror.EPERM } case linux.ARCH_GET_GS, linux.ARCH_SET_GS: t.Kernel().EmitUnimplementedEvent(t) fallthrough default: - return 0, nil, syscall.EINVAL + return 0, nil, syserror.EINVAL } return 0, nil, nil diff --git a/pkg/sentry/syscalls/linux/sys_utsname.go b/pkg/sentry/syscalls/linux/sys_utsname.go index fa81fe10e..271ace08e 100644 --- a/pkg/sentry/syscalls/linux/sys_utsname.go +++ b/pkg/sentry/syscalls/linux/sys_utsname.go @@ -17,10 +17,10 @@ package linux import ( - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) // Uname implements linux syscall uname. diff --git a/pkg/sentry/syscalls/linux/sys_write.go b/pkg/sentry/syscalls/linux/sys_write.go index 1da72d606..5278c96a6 100644 --- a/pkg/sentry/syscalls/linux/sys_write.go +++ b/pkg/sentry/syscalls/linux/sys_write.go @@ -17,16 +17,15 @@ package linux import ( "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/fs" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/kdefs" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" - "gvisor.googlesource.com/gvisor/pkg/waiter" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/sentry/socket" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/waiter" ) const ( @@ -39,11 +38,11 @@ const ( // Write implements linux syscall write(2). func Write(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() size := args[2].SizeT() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -75,12 +74,12 @@ func Write(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall // Pwrite64 implements linux syscall pwrite64(2). func Pwrite64(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() size := args[2].SizeT() offset := args[3].Int64() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -122,11 +121,11 @@ func Pwrite64(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // Writev implements linux syscall writev(2). func Writev(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() iovcnt := int(args[2].Int()) - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -152,12 +151,12 @@ func Writev(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // Pwritev implements linux syscall pwritev(2). func Pwritev(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) { - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() iovcnt := int(args[2].Int()) offset := args[3].Int64() - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } @@ -202,7 +201,7 @@ func Pwritev2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc // splits the offset argument into a high/low value for compatibility with // 32-bit architectures. The flags argument is the 5th argument. - fd := kdefs.FD(args[0].Int()) + fd := args[0].Int() addr := args[1].Pointer() iovcnt := int(args[2].Int()) offset := args[3].Int64() @@ -212,7 +211,7 @@ func Pwritev2(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc return 0, nil, syserror.EACCES } - file := t.FDMap().GetFile(fd) + file := t.GetFile(fd) if file == nil { return 0, nil, syserror.EBADF } diff --git a/pkg/sentry/syscalls/linux/timespec.go b/pkg/sentry/syscalls/linux/timespec.go index fa6fcdc0b..4ff8f9234 100644 --- a/pkg/sentry/syscalls/linux/timespec.go +++ b/pkg/sentry/syscalls/linux/timespec.go @@ -15,13 +15,12 @@ package linux import ( - "syscall" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/syserror" ) // copyTimespecIn copies a Timespec from the untrusted app range to the kernel. @@ -70,7 +69,7 @@ func copyTimevalIn(t *kernel.Task, addr usermem.Addr) (linux.Timeval, error) { tv.Usec = int64(usermem.ByteOrder.Uint64(in[8:])) return tv, nil default: - return linux.Timeval{}, syscall.ENOSYS + return linux.Timeval{}, syserror.ENOSYS } } @@ -84,7 +83,7 @@ func copyTimevalOut(t *kernel.Task, addr usermem.Addr, tv *linux.Timeval) error _, err := t.CopyOutBytes(addr, out) return err default: - return syscall.ENOSYS + return syserror.ENOSYS } } @@ -104,7 +103,7 @@ func copyTimespecInToDuration(t *kernel.Task, timespecAddr usermem.Addr) (time.D return 0, err } if !timespec.Valid() { - return 0, syscall.EINVAL + return 0, syserror.EINVAL } timeout = time.Duration(timespec.ToNsecCapped()) } diff --git a/pkg/sentry/syscalls/syscalls.go b/pkg/sentry/syscalls/syscalls.go index 48c114232..f88055676 100644 --- a/pkg/sentry/syscalls/syscalls.go +++ b/pkg/sentry/syscalls/syscalls.go @@ -26,12 +26,11 @@ package syscalls import ( "fmt" - "syscall" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/sentry/arch" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/arch" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/syserror" ) // Supported returns a syscall that is fully supported. @@ -40,16 +39,7 @@ func Supported(name string, fn kernel.SyscallFn) kernel.Syscall { Name: name, Fn: fn, SupportLevel: kernel.SupportFull, - Note: "Full Support", - } -} - -// Undocumented returns a syscall that is undocumented. -func Undocumented(name string, fn kernel.SyscallFn) kernel.Syscall { - return kernel.Syscall{ - Name: name, - Fn: fn, - SupportLevel: kernel.SupportUndocumented, + Note: "Fully Supported.", } } @@ -65,7 +55,7 @@ func PartiallySupported(name string, fn kernel.SyscallFn, note string, urls []st } // Error returns a syscall handler that will always give the passed error. -func Error(name string, err syscall.Errno, note string, urls []string) kernel.Syscall { +func Error(name string, err error, note string, urls []string) kernel.Syscall { if note != "" { note = note + "; " } @@ -75,14 +65,14 @@ func Error(name string, err syscall.Errno, note string, urls []string) kernel.Sy return 0, nil, err }, SupportLevel: kernel.SupportUnimplemented, - Note: fmt.Sprintf("%sReturns %q", note, err.Error()), + Note: fmt.Sprintf("%sReturns %q.", note, err.Error()), URLs: urls, } } // ErrorWithEvent gives a syscall function that sends an unimplemented // syscall event via the event channel and returns the passed error. -func ErrorWithEvent(name string, err syscall.Errno, note string, urls []string) kernel.Syscall { +func ErrorWithEvent(name string, err error, note string, urls []string) kernel.Syscall { if note != "" { note = note + "; " } @@ -93,7 +83,7 @@ func ErrorWithEvent(name string, err syscall.Errno, note string, urls []string) return 0, nil, err }, SupportLevel: kernel.SupportUnimplemented, - Note: fmt.Sprintf("%sReturns %q", note, err.Error()), + Note: fmt.Sprintf("%sReturns %q.", note, err.Error()), URLs: urls, } } @@ -115,7 +105,7 @@ func CapError(name string, c linux.Capability, note string, urls []string) kerne return 0, nil, syserror.ENOSYS }, SupportLevel: kernel.SupportUnimplemented, - Note: fmt.Sprintf("%sReturns %q if the process does not have %s; %q otherwise", note, syserror.EPERM, c.String(), syserror.ENOSYS), + Note: fmt.Sprintf("%sReturns %q if the process does not have %s; %q otherwise.", note, syserror.EPERM, c.String(), syserror.ENOSYS), URLs: urls, } } diff --git a/pkg/sentry/time/BUILD b/pkg/sentry/time/BUILD index b50579a92..8aa6a3017 100644 --- a/pkg/sentry/time/BUILD +++ b/pkg/sentry/time/BUILD @@ -6,7 +6,7 @@ load("//tools/go_generics:defs.bzl", "go_template_instance") go_template_instance( name = "seqatomic_parameters", - out = "seqatomic_parameters.go", + out = "seqatomic_parameters_unsafe.go", package = "time", suffix = "Parameters", template = "//third_party/gvsync:generic_seqatomic", @@ -27,11 +27,11 @@ go_library( "parameters.go", "sampler.go", "sampler_unsafe.go", - "seqatomic_parameters.go", + "seqatomic_parameters_unsafe.go", "tsc_amd64.s", "tsc_arm64.s", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/time", + importpath = "gvisor.dev/gvisor/pkg/sentry/time", visibility = ["//:sandbox"], deps = [ "//pkg/log", diff --git a/pkg/sentry/time/calibrated_clock.go b/pkg/sentry/time/calibrated_clock.go index c27e391c9..318503277 100644 --- a/pkg/sentry/time/calibrated_clock.go +++ b/pkg/sentry/time/calibrated_clock.go @@ -20,9 +20,9 @@ import ( "sync" "time" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/syserror" ) // fallbackMetric tracks failed updates. It is not sync, as it is not critical diff --git a/pkg/sentry/time/parameters.go b/pkg/sentry/time/parameters.go index 63cf7c4a3..65868cb26 100644 --- a/pkg/sentry/time/parameters.go +++ b/pkg/sentry/time/parameters.go @@ -18,7 +18,7 @@ import ( "fmt" "time" - "gvisor.googlesource.com/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/log" ) const ( diff --git a/pkg/sentry/time/sampler.go b/pkg/sentry/time/sampler.go index 2140a99b7..4ac9c4474 100644 --- a/pkg/sentry/time/sampler.go +++ b/pkg/sentry/time/sampler.go @@ -17,7 +17,7 @@ package time import ( "errors" - "gvisor.googlesource.com/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/log" ) const ( diff --git a/pkg/sentry/unimpl/BUILD b/pkg/sentry/unimpl/BUILD index b608867a9..b69603da3 100644 --- a/pkg/sentry/unimpl/BUILD +++ b/pkg/sentry/unimpl/BUILD @@ -12,7 +12,7 @@ proto_library( go_proto_library( name = "unimplemented_syscall_go_proto", - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/unimpl/unimplemented_syscall_go_proto", + importpath = "gvisor.dev/gvisor/pkg/sentry/unimpl/unimplemented_syscall_go_proto", proto = ":unimplemented_syscall_proto", visibility = ["//visibility:public"], deps = ["//pkg/sentry/arch:registers_go_proto"], @@ -21,7 +21,7 @@ go_proto_library( go_library( name = "unimpl", srcs = ["events.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/unimpl", + importpath = "gvisor.dev/gvisor/pkg/sentry/unimpl", visibility = ["//:sandbox"], deps = [ "//pkg/log", diff --git a/pkg/sentry/unimpl/events.go b/pkg/sentry/unimpl/events.go index d92766e2d..79b5de9e4 100644 --- a/pkg/sentry/unimpl/events.go +++ b/pkg/sentry/unimpl/events.go @@ -17,8 +17,8 @@ package unimpl import ( - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/sentry/context" ) // contextID is the events package's type for context.Context.Value keys. diff --git a/pkg/sentry/uniqueid/BUILD b/pkg/sentry/uniqueid/BUILD index ccc5a28d3..86a87edd4 100644 --- a/pkg/sentry/uniqueid/BUILD +++ b/pkg/sentry/uniqueid/BUILD @@ -5,7 +5,7 @@ package(licenses = ["notice"]) go_library( name = "uniqueid", srcs = ["context.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/uniqueid", + importpath = "gvisor.dev/gvisor/pkg/sentry/uniqueid", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/sentry/context", diff --git a/pkg/sentry/uniqueid/context.go b/pkg/sentry/uniqueid/context.go index e55b89689..4e466d66d 100644 --- a/pkg/sentry/uniqueid/context.go +++ b/pkg/sentry/uniqueid/context.go @@ -17,8 +17,8 @@ package uniqueid import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" ) // contextID is the kernel package's type for context.Context.Value keys. diff --git a/pkg/sentry/usage/BUILD b/pkg/sentry/usage/BUILD index 860733061..a34c39540 100644 --- a/pkg/sentry/usage/BUILD +++ b/pkg/sentry/usage/BUILD @@ -11,7 +11,7 @@ go_library( "memory_unsafe.go", "usage.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/usage", + importpath = "gvisor.dev/gvisor/pkg/sentry/usage", visibility = [ "//pkg/sentry:internal", ], diff --git a/pkg/sentry/usage/memory.go b/pkg/sentry/usage/memory.go index 9ed974ccb..f4326706a 100644 --- a/pkg/sentry/usage/memory.go +++ b/pkg/sentry/usage/memory.go @@ -21,8 +21,8 @@ import ( "sync/atomic" "syscall" - "gvisor.googlesource.com/gvisor/pkg/bits" - "gvisor.googlesource.com/gvisor/pkg/memutil" + "gvisor.dev/gvisor/pkg/bits" + "gvisor.dev/gvisor/pkg/memutil" ) // MemoryKind represents a type of memory used by the application. diff --git a/pkg/sentry/usermem/BUILD b/pkg/sentry/usermem/BUILD index e38b31b08..a5b4206bb 100644 --- a/pkg/sentry/usermem/BUILD +++ b/pkg/sentry/usermem/BUILD @@ -28,7 +28,7 @@ go_library( "usermem_unsafe.go", "usermem_x86.go", ], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/usermem", + importpath = "gvisor.dev/gvisor/pkg/sentry/usermem", visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/atomicbitops", diff --git a/pkg/sentry/usermem/bytes_io.go b/pkg/sentry/usermem/bytes_io.go index f98d82168..8d88396ba 100644 --- a/pkg/sentry/usermem/bytes_io.go +++ b/pkg/sentry/usermem/bytes_io.go @@ -15,9 +15,9 @@ package usermem import ( - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/syserror" ) const maxInt = int(^uint(0) >> 1) diff --git a/pkg/sentry/usermem/bytes_io_unsafe.go b/pkg/sentry/usermem/bytes_io_unsafe.go index bb49d2ff3..fca5952f4 100644 --- a/pkg/sentry/usermem/bytes_io_unsafe.go +++ b/pkg/sentry/usermem/bytes_io_unsafe.go @@ -18,8 +18,8 @@ import ( "sync/atomic" "unsafe" - "gvisor.googlesource.com/gvisor/pkg/atomicbitops" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/atomicbitops" + "gvisor.dev/gvisor/pkg/sentry/context" ) // SwapUint32 implements IO.SwapUint32. diff --git a/pkg/sentry/usermem/usermem.go b/pkg/sentry/usermem/usermem.go index 9dde327a2..6eced660a 100644 --- a/pkg/sentry/usermem/usermem.go +++ b/pkg/sentry/usermem/usermem.go @@ -20,10 +20,10 @@ import ( "io" "strconv" - "gvisor.googlesource.com/gvisor/pkg/binary" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/syserror" ) // IO provides access to the contents of a virtual memory space. diff --git a/pkg/sentry/usermem/usermem_test.go b/pkg/sentry/usermem/usermem_test.go index 575e5039d..299f64754 100644 --- a/pkg/sentry/usermem/usermem_test.go +++ b/pkg/sentry/usermem/usermem_test.go @@ -22,9 +22,9 @@ import ( "strings" "testing" - "gvisor.googlesource.com/gvisor/pkg/sentry/context" - "gvisor.googlesource.com/gvisor/pkg/sentry/safemem" - "gvisor.googlesource.com/gvisor/pkg/syserror" + "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/syserror" ) // newContext returns a context.Context that we can use in these tests (we diff --git a/pkg/sentry/watchdog/BUILD b/pkg/sentry/watchdog/BUILD index 0bbf3705c..4d8435265 100644 --- a/pkg/sentry/watchdog/BUILD +++ b/pkg/sentry/watchdog/BUILD @@ -5,7 +5,7 @@ package(licenses = ["notice"]) go_library( name = "watchdog", srcs = ["watchdog.go"], - importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/watchdog", + importpath = "gvisor.dev/gvisor/pkg/sentry/watchdog", visibility = ["//:sandbox"], deps = [ "//pkg/abi/linux", diff --git a/pkg/sentry/watchdog/watchdog.go b/pkg/sentry/watchdog/watchdog.go index 2fc4472dd..145102c0d 100644 --- a/pkg/sentry/watchdog/watchdog.go +++ b/pkg/sentry/watchdog/watchdog.go @@ -35,11 +35,11 @@ import ( "sync" "time" - "gvisor.googlesource.com/gvisor/pkg/abi/linux" - "gvisor.googlesource.com/gvisor/pkg/log" - "gvisor.googlesource.com/gvisor/pkg/metric" - "gvisor.googlesource.com/gvisor/pkg/sentry/kernel" - ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/metric" + "gvisor.dev/gvisor/pkg/sentry/kernel" + ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" ) // DefaultTimeout is a resonable timeout value for most applications. @@ -271,23 +271,23 @@ func (w *Watchdog) reportStuckWatchdog() { w.onStuckTask(true, &buf) } -func (w *Watchdog) onStuckTask(newTaskFound bool, buf *bytes.Buffer) { +func (w *Watchdog) onStuckTask(newTaskFound bool, msg *bytes.Buffer) { switch w.timeoutAction { case LogWarning: // Dump stack only if a new task is detected or if it sometime has passed since // the last time a stack dump was generated. if !newTaskFound && time.Since(w.lastStackDump) < stackDumpSameTaskPeriod { - buf.WriteString("\n...[stack dump skipped]...") - log.Warningf(buf.String()) + msg.WriteString("\n...[stack dump skipped]...") + log.Warningf(msg.String()) } else { - log.TracebackAll(buf.String()) + log.TracebackAll(msg.String()) w.lastStackDump = time.Now() } case Panic: // Panic will skip over running tasks, which is likely the culprit here. So manually // dump all stacks before panic'ing. - log.TracebackAll(buf.String()) + log.TracebackAll(msg.String()) // Attempt to flush metrics, timeout and move on in case metrics are stuck as well. metricsEmitted := make(chan struct{}, 1) @@ -300,6 +300,6 @@ func (w *Watchdog) onStuckTask(newTaskFound bool, buf *bytes.Buffer) { case <-metricsEmitted: case <-time.After(1 * time.Second): } - panic("Sentry detected stuck task(s). See stack trace and message above for more details") + panic(fmt.Sprintf("Stack for running G's are skipped while panicking.\n%s", msg.String())) } } |