1 files changed, 0 insertions, 337 deletions
diff --git a/pkg/sentry/fsimpl/proc/tasks_files.go b/pkg/sentry/fsimpl/proc/tasks_files.go
deleted file mode 100644
index 434998910..000000000
--- a/pkg/sentry/fsimpl/proc/tasks_files.go
+++ /dev/null
@@ -1,337 +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 proc
-
-import (
-	"bytes"
-	"fmt"
-	"strconv"
-
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/context"
-	"gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs"
-	"gvisor.dev/gvisor/pkg/sentry/kernel"
-	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
-	"gvisor.dev/gvisor/pkg/sentry/kernel/time"
-	"gvisor.dev/gvisor/pkg/sentry/usage"
-	"gvisor.dev/gvisor/pkg/syserror"
-	"gvisor.dev/gvisor/pkg/usermem"
-)
-
-type selfSymlink struct {
-	kernfs.InodeAttrs
-	kernfs.InodeNoopRefCount
-	kernfs.InodeSymlink
-
-	pidns *kernel.PIDNamespace
-}
-
-var _ kernfs.Inode = (*selfSymlink)(nil)
-
-func newSelfSymlink(creds *auth.Credentials, ino uint64, perm linux.FileMode, pidns *kernel.PIDNamespace) *kernfs.Dentry {
-	inode := &selfSymlink{pidns: pidns}
-	inode.Init(creds, ino, linux.ModeSymlink|perm)
-
-	d := &kernfs.Dentry{}
-	d.Init(inode)
-	return d
-}
-
-func (s *selfSymlink) Readlink(ctx context.Context) (string, error) {
-	t := kernel.TaskFromContext(ctx)
-	if t == nil {
-		// Who is reading this link?
-		return "", syserror.EINVAL
-	}
-	tgid := s.pidns.IDOfThreadGroup(t.ThreadGroup())
-	if tgid == 0 {
-		return "", syserror.ENOENT
-	}
-	return strconv.FormatUint(uint64(tgid), 10), nil
-}
-
-type threadSelfSymlink struct {
-	kernfs.InodeAttrs
-	kernfs.InodeNoopRefCount
-	kernfs.InodeSymlink
-
-	pidns *kernel.PIDNamespace
-}
-
-var _ kernfs.Inode = (*threadSelfSymlink)(nil)
-
-func newThreadSelfSymlink(creds *auth.Credentials, ino uint64, perm linux.FileMode, pidns *kernel.PIDNamespace) *kernfs.Dentry {
-	inode := &threadSelfSymlink{pidns: pidns}
-	inode.Init(creds, ino, linux.ModeSymlink|perm)
-
-	d := &kernfs.Dentry{}
-	d.Init(inode)
-	return d
-}
-
-func (s *threadSelfSymlink) Readlink(ctx context.Context) (string, error) {
-	t := kernel.TaskFromContext(ctx)
-	if t == nil {
-		// Who is reading this link?
-		return "", syserror.EINVAL
-	}
-	tgid := s.pidns.IDOfThreadGroup(t.ThreadGroup())
-	tid := s.pidns.IDOfTask(t)
-	if tid == 0 || tgid == 0 {
-		return "", syserror.ENOENT
-	}
-	return fmt.Sprintf("%d/task/%d", tgid, tid), nil
-}
-
-// cpuStats contains the breakdown of CPU time for /proc/stat.
-type cpuStats struct {
-	// user is time spent in userspace tasks with non-positive niceness.
-	user uint64
-
-	// nice is time spent in userspace tasks with positive niceness.
-	nice uint64
-
-	// system is time spent in non-interrupt kernel context.
-	system uint64
-
-	// idle is time spent idle.
-	idle uint64
-
-	// ioWait is time spent waiting for IO.
-	ioWait uint64
-
-	// irq is time spent in interrupt context.
-	irq uint64
-
-	// softirq is time spent in software interrupt context.
-	softirq uint64
-
-	// steal is involuntary wait time.
-	steal uint64
-
-	// guest is time spent in guests with non-positive niceness.
-	guest uint64
-
-	// guestNice is time spent in guests with positive niceness.
-	guestNice uint64
-}
-
-// String implements fmt.Stringer.
-func (c cpuStats) String() string {
-	return fmt.Sprintf("%d %d %d %d %d %d %d %d %d %d", c.user, c.nice, c.system, c.idle, c.ioWait, c.irq, c.softirq, c.steal, c.guest, c.guestNice)
-}
-
-// statData implements vfs.DynamicBytesSource for /proc/stat.
-//
-// +stateify savable
-type statData struct {
-	kernfs.DynamicBytesFile
-
-	// k is the owning Kernel.
-	k *kernel.Kernel
-}
-
-var _ dynamicInode = (*statData)(nil)
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (s *statData) Generate(ctx context.Context, buf *bytes.Buffer) error {
-	// TODO(b/37226836): We currently export only zero CPU stats. We could
-	// at least provide some aggregate stats.
-	var cpu cpuStats
-	fmt.Fprintf(buf, "cpu  %s\n", cpu)
-
-	for c, max := uint(0), s.k.ApplicationCores(); c < max; c++ {
-		fmt.Fprintf(buf, "cpu%d %s\n", c, cpu)
-	}
-
-	// The total number of interrupts is dependent on the CPUs and PCI
-	// devices on the system. See arch_probe_nr_irqs.
-	//
-	// Since we don't report real interrupt stats, just choose an arbitrary
-	// value from a representative VM.
-	const numInterrupts = 256
-
-	// The Kernel doesn't handle real interrupts, so report all zeroes.
-	// TODO(b/37226836): We could count page faults as #PF.
-	fmt.Fprintf(buf, "intr 0") // total
-	for i := 0; i < numInterrupts; i++ {
-		fmt.Fprintf(buf, " 0")
-	}
-	fmt.Fprintf(buf, "\n")
-
-	// Total number of context switches.
-	// TODO(b/37226836): Count this.
-	fmt.Fprintf(buf, "ctxt 0\n")
-
-	// CLOCK_REALTIME timestamp from boot, in seconds.
-	fmt.Fprintf(buf, "btime %d\n", s.k.Timekeeper().BootTime().Seconds())
-
-	// Total number of clones.
-	// TODO(b/37226836): Count this.
-	fmt.Fprintf(buf, "processes 0\n")
-
-	// Number of runnable tasks.
-	// TODO(b/37226836): Count this.
-	fmt.Fprintf(buf, "procs_running 0\n")
-
-	// Number of tasks waiting on IO.
-	// TODO(b/37226836): Count this.
-	fmt.Fprintf(buf, "procs_blocked 0\n")
-
-	// Number of each softirq handled.
-	fmt.Fprintf(buf, "softirq 0") // total
-	for i := 0; i < linux.NumSoftIRQ; i++ {
-		fmt.Fprintf(buf, " 0")
-	}
-	fmt.Fprintf(buf, "\n")
-	return nil
-}
-
-// loadavgData backs /proc/loadavg.
-//
-// +stateify savable
-type loadavgData struct {
-	kernfs.DynamicBytesFile
-}
-
-var _ dynamicInode = (*loadavgData)(nil)
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (d *loadavgData) Generate(ctx context.Context, buf *bytes.Buffer) error {
-	// TODO(b/62345059): Include real data in fields.
-	// Column 1-3: CPU and IO utilization of the last 1, 5, and 10 minute periods.
-	// Column 4-5: currently running processes and the total number of processes.
-	// Column 6: the last process ID used.
-	fmt.Fprintf(buf, "%.2f %.2f %.2f %d/%d %d\n", 0.00, 0.00, 0.00, 0, 0, 0)
-	return nil
-}
-
-// meminfoData implements vfs.DynamicBytesSource for /proc/meminfo.
-//
-// +stateify savable
-type meminfoData struct {
-	kernfs.DynamicBytesFile
-
-	// k is the owning Kernel.
-	k *kernel.Kernel
-}
-
-var _ dynamicInode = (*meminfoData)(nil)
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (d *meminfoData) Generate(ctx context.Context, buf *bytes.Buffer) error {
-	mf := d.k.MemoryFile()
-	mf.UpdateUsage()
-	snapshot, totalUsage := usage.MemoryAccounting.Copy()
-	totalSize := usage.TotalMemory(mf.TotalSize(), totalUsage)
-	anon := snapshot.Anonymous + snapshot.Tmpfs
-	file := snapshot.PageCache + snapshot.Mapped
-	// We don't actually have active/inactive LRUs, so just make up numbers.
-	activeFile := (file / 2) &^ (usermem.PageSize - 1)
-	inactiveFile := file - activeFile
-
-	fmt.Fprintf(buf, "MemTotal:       %8d kB\n", totalSize/1024)
-	memFree := (totalSize - totalUsage) / 1024
-	// We use MemFree as MemAvailable because we don't swap.
-	// TODO(rahat): When reclaim is implemented the value of MemAvailable
-	// should change.
-	fmt.Fprintf(buf, "MemFree:        %8d kB\n", memFree)
-	fmt.Fprintf(buf, "MemAvailable:   %8d kB\n", memFree)
-	fmt.Fprintf(buf, "Buffers:               0 kB\n") // memory usage by block devices
-	fmt.Fprintf(buf, "Cached:         %8d kB\n", (file+snapshot.Tmpfs)/1024)
-	// Emulate a system with no swap, which disables inactivation of anon pages.
-	fmt.Fprintf(buf, "SwapCache:             0 kB\n")
-	fmt.Fprintf(buf, "Active:         %8d kB\n", (anon+activeFile)/1024)
-	fmt.Fprintf(buf, "Inactive:       %8d kB\n", inactiveFile/1024)
-	fmt.Fprintf(buf, "Active(anon):   %8d kB\n", anon/1024)
-	fmt.Fprintf(buf, "Inactive(anon):        0 kB\n")
-	fmt.Fprintf(buf, "Active(file):   %8d kB\n", activeFile/1024)
-	fmt.Fprintf(buf, "Inactive(file): %8d kB\n", inactiveFile/1024)
-	fmt.Fprintf(buf, "Unevictable:           0 kB\n") // TODO(b/31823263)
-	fmt.Fprintf(buf, "Mlocked:               0 kB\n") // TODO(b/31823263)
-	fmt.Fprintf(buf, "SwapTotal:             0 kB\n")
-	fmt.Fprintf(buf, "SwapFree:              0 kB\n")
-	fmt.Fprintf(buf, "Dirty:                 0 kB\n")
-	fmt.Fprintf(buf, "Writeback:             0 kB\n")
-	fmt.Fprintf(buf, "AnonPages:      %8d kB\n", anon/1024)
-	fmt.Fprintf(buf, "Mapped:         %8d kB\n", file/1024) // doesn't count mapped tmpfs, which we don't know
-	fmt.Fprintf(buf, "Shmem:          %8d kB\n", snapshot.Tmpfs/1024)
-	return nil
-}
-
-// uptimeData implements vfs.DynamicBytesSource for /proc/uptime.
-//
-// +stateify savable
-type uptimeData struct {
-	kernfs.DynamicBytesFile
-}
-
-var _ dynamicInode = (*uptimeData)(nil)
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (*uptimeData) Generate(ctx context.Context, buf *bytes.Buffer) error {
-	k := kernel.KernelFromContext(ctx)
-	now := time.NowFromContext(ctx)
-
-	// Pretend that we've spent zero time sleeping (second number).
-	fmt.Fprintf(buf, "%.2f 0.00\n", now.Sub(k.Timekeeper().BootTime()).Seconds())
-	return nil
-}
-
-// versionData implements vfs.DynamicBytesSource for /proc/version.
-//
-// +stateify savable
-type versionData struct {
-	kernfs.DynamicBytesFile
-
-	// k is the owning Kernel.
-	k *kernel.Kernel
-}
-
-var _ dynamicInode = (*versionData)(nil)
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (v *versionData) Generate(ctx context.Context, buf *bytes.Buffer) error {
-	init := v.k.GlobalInit()
-	if init == nil {
-		// Attempted to read before the init Task is created. This can
-		// only occur during startup, which should never need to read
-		// this file.
-		panic("Attempted to read version before initial Task is available")
-	}
-
-	// /proc/version takes the form:
-	//
-	// "SYSNAME version RELEASE (COMPILE_USER@COMPILE_HOST)
-	// (COMPILER_VERSION) VERSION"
-	//
-	// where:
-	// - SYSNAME, RELEASE, and VERSION are the same as returned by
-	// sys_utsname
-	// - COMPILE_USER is the user that build the kernel
-	// - COMPILE_HOST is the hostname of the machine on which the kernel
-	// was built
-	// - COMPILER_VERSION is the version reported by the building compiler
-	//
-	// Since we don't really want to expose build information to
-	// applications, those fields are omitted.
-	//
-	// FIXME(mpratt): Using Version from the init task SyscallTable
-	// disregards the different version a task may have (e.g., in a uts
-	// namespace).
-	ver := init.Leader().SyscallTable().Version
-	fmt.Fprintf(buf, "%s version %s %s\n", ver.Sysname, ver.Release, ver.Version)
-	return nil
-}