diff options
Diffstat (limited to 'pkg/sentry/fs')
70 files changed, 263 insertions, 351 deletions
diff --git a/pkg/sentry/fs/BUILD b/pkg/sentry/fs/BUILD index c035ffff7..7d5d72d5a 100644 --- a/pkg/sentry/fs/BUILD +++ b/pkg/sentry/fs/BUILD @@ -68,7 +68,7 @@ go_library( "//pkg/sentry/usage", "//pkg/sentry/usermem", "//pkg/state", - "//pkg/syncutil", + "//pkg/sync", "//pkg/syserror", "//pkg/waiter", ], @@ -115,6 +115,7 @@ go_test( "//pkg/sentry/fs/tmpfs", "//pkg/sentry/kernel/contexttest", "//pkg/sentry/usermem", + "//pkg/sync", "//pkg/syserror", ], ) diff --git a/pkg/sentry/fs/copy_up.go b/pkg/sentry/fs/copy_up.go index 9ac62c84d..e03e3e417 100644 --- a/pkg/sentry/fs/copy_up.go +++ b/pkg/sentry/fs/copy_up.go @@ -17,12 +17,13 @@ package fs import ( "fmt" "io" - "sync" + "gvisor.dev/gvisor/pkg/abi/linux" "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/sync" "gvisor.dev/gvisor/pkg/syserror" ) @@ -395,12 +396,12 @@ func copyContentsLocked(ctx context.Context, upper *Inode, lower *Inode, size in // Size and permissions are set on upper when the file content is copied // and when the file is created respectively. func copyAttributesLocked(ctx context.Context, upper *Inode, lower *Inode) error { - // Extract attributes fro the lower filesystem. + // Extract attributes from the lower filesystem. lowerAttr, err := lower.UnstableAttr(ctx) if err != nil { return err } - lowerXattr, err := lower.Listxattr() + lowerXattr, err := lower.ListXattr(ctx) if err != nil && err != syserror.EOPNOTSUPP { return err } @@ -421,11 +422,11 @@ func copyAttributesLocked(ctx context.Context, upper *Inode, lower *Inode) error if isXattrOverlay(name) { continue } - value, err := lower.Getxattr(name) + value, err := lower.GetXattr(ctx, name, linux.XATTR_SIZE_MAX) if err != nil { return err } - if err := upper.InodeOperations.Setxattr(upper, name, value); err != nil { + if err := upper.InodeOperations.SetXattr(ctx, upper, name, value, 0 /* flags */); err != nil { return err } } diff --git a/pkg/sentry/fs/copy_up_test.go b/pkg/sentry/fs/copy_up_test.go index 1d80bf15a..738580c5f 100644 --- a/pkg/sentry/fs/copy_up_test.go +++ b/pkg/sentry/fs/copy_up_test.go @@ -19,13 +19,13 @@ import ( "crypto/rand" "fmt" "io" - "sync" "testing" "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" + "gvisor.dev/gvisor/pkg/sync" ) const ( diff --git a/pkg/sentry/fs/dirent.go b/pkg/sentry/fs/dirent.go index 3cb73bd78..31fc4d87b 100644 --- a/pkg/sentry/fs/dirent.go +++ b/pkg/sentry/fs/dirent.go @@ -18,7 +18,6 @@ import ( "fmt" "path" "sort" - "sync" "sync/atomic" "syscall" @@ -28,6 +27,7 @@ import ( "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/sync" "gvisor.dev/gvisor/pkg/syserror" ) diff --git a/pkg/sentry/fs/dirent_cache.go b/pkg/sentry/fs/dirent_cache.go index 60a15a275..25514ace4 100644 --- a/pkg/sentry/fs/dirent_cache.go +++ b/pkg/sentry/fs/dirent_cache.go @@ -16,7 +16,8 @@ package fs import ( "fmt" - "sync" + + "gvisor.dev/gvisor/pkg/sync" ) // DirentCache is an LRU cache of Dirents. The Dirent's refCount is diff --git a/pkg/sentry/fs/dirent_cache_limiter.go b/pkg/sentry/fs/dirent_cache_limiter.go index ebb80bd50..525ee25f9 100644 --- a/pkg/sentry/fs/dirent_cache_limiter.go +++ b/pkg/sentry/fs/dirent_cache_limiter.go @@ -16,7 +16,8 @@ package fs import ( "fmt" - "sync" + + "gvisor.dev/gvisor/pkg/sync" ) // DirentCacheLimiter acts as a global limit for all dirent caches in the diff --git a/pkg/sentry/fs/fdpipe/BUILD b/pkg/sentry/fs/fdpipe/BUILD index 277ee4c31..cc43de69d 100644 --- a/pkg/sentry/fs/fdpipe/BUILD +++ b/pkg/sentry/fs/fdpipe/BUILD @@ -23,6 +23,7 @@ go_library( "//pkg/sentry/fs/fsutil", "//pkg/sentry/safemem", "//pkg/sentry/usermem", + "//pkg/sync", "//pkg/syserror", "//pkg/waiter", ], diff --git a/pkg/sentry/fs/fdpipe/pipe.go b/pkg/sentry/fs/fdpipe/pipe.go index 669ffcb75..5b6cfeb0a 100644 --- a/pkg/sentry/fs/fdpipe/pipe.go +++ b/pkg/sentry/fs/fdpipe/pipe.go @@ -17,7 +17,6 @@ package fdpipe import ( "os" - "sync" "syscall" "gvisor.dev/gvisor/pkg/fd" @@ -29,6 +28,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" "gvisor.dev/gvisor/pkg/sentry/safemem" "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) diff --git a/pkg/sentry/fs/fdpipe/pipe_state.go b/pkg/sentry/fs/fdpipe/pipe_state.go index 29175fb3d..cee87f726 100644 --- a/pkg/sentry/fs/fdpipe/pipe_state.go +++ b/pkg/sentry/fs/fdpipe/pipe_state.go @@ -17,10 +17,10 @@ package fdpipe import ( "fmt" "io/ioutil" - "sync" "gvisor.dev/gvisor/pkg/sentry/context" "gvisor.dev/gvisor/pkg/sentry/fs" + "gvisor.dev/gvisor/pkg/sync" ) // beforeSave is invoked by stateify. diff --git a/pkg/sentry/fs/file.go b/pkg/sentry/fs/file.go index a2f966cb6..7c4586296 100644 --- a/pkg/sentry/fs/file.go +++ b/pkg/sentry/fs/file.go @@ -16,7 +16,6 @@ package fs import ( "math" - "sync" "sync/atomic" "time" @@ -29,6 +28,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/memmap" "gvisor.dev/gvisor/pkg/sentry/uniqueid" "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) diff --git a/pkg/sentry/fs/file_overlay.go b/pkg/sentry/fs/file_overlay.go index 225e40186..8991207b4 100644 --- a/pkg/sentry/fs/file_overlay.go +++ b/pkg/sentry/fs/file_overlay.go @@ -16,13 +16,13 @@ package fs import ( "io" - "sync" "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/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) @@ -475,7 +475,7 @@ func readdirEntries(ctx context.Context, o *overlayEntry) (*SortedDentryMap, err // Skip this name if it is a negative entry in the // upper or there exists a whiteout for it. if o.upper != nil { - if overlayHasWhiteout(o.upper, name) { + if overlayHasWhiteout(ctx, o.upper, name) { continue } } diff --git a/pkg/sentry/fs/filesystems.go b/pkg/sentry/fs/filesystems.go index b157fd228..c5b51620a 100644 --- a/pkg/sentry/fs/filesystems.go +++ b/pkg/sentry/fs/filesystems.go @@ -18,9 +18,9 @@ import ( "fmt" "sort" "strings" - "sync" "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sync" ) // FilesystemFlags matches include/linux/fs.h:file_system_type.fs_flags. diff --git a/pkg/sentry/fs/fs.go b/pkg/sentry/fs/fs.go index 8b2a5e6b2..26abf49e2 100644 --- a/pkg/sentry/fs/fs.go +++ b/pkg/sentry/fs/fs.go @@ -54,10 +54,9 @@ package fs import ( - "sync" - "gvisor.dev/gvisor/pkg/log" "gvisor.dev/gvisor/pkg/sentry/context" + "gvisor.dev/gvisor/pkg/sync" ) var ( diff --git a/pkg/sentry/fs/fsutil/BUILD b/pkg/sentry/fs/fsutil/BUILD index 9ca695a95..945b6270d 100644 --- a/pkg/sentry/fs/fsutil/BUILD +++ b/pkg/sentry/fs/fsutil/BUILD @@ -93,6 +93,7 @@ go_library( "//pkg/sentry/usage", "//pkg/sentry/usermem", "//pkg/state", + "//pkg/sync", "//pkg/syserror", "//pkg/waiter", ], diff --git a/pkg/sentry/fs/fsutil/host_file_mapper.go b/pkg/sentry/fs/fsutil/host_file_mapper.go index b06a71cc2..837fc70b5 100644 --- a/pkg/sentry/fs/fsutil/host_file_mapper.go +++ b/pkg/sentry/fs/fsutil/host_file_mapper.go @@ -16,7 +16,6 @@ package fsutil import ( "fmt" - "sync" "syscall" "gvisor.dev/gvisor/pkg/log" @@ -24,6 +23,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/platform" "gvisor.dev/gvisor/pkg/sentry/safemem" "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sync" ) // HostFileMapper caches mappings of an arbitrary host file descriptor. It is diff --git a/pkg/sentry/fs/fsutil/host_mappable.go b/pkg/sentry/fs/fsutil/host_mappable.go index 30475f340..a625f0e26 100644 --- a/pkg/sentry/fs/fsutil/host_mappable.go +++ b/pkg/sentry/fs/fsutil/host_mappable.go @@ -16,7 +16,6 @@ package fsutil import ( "math" - "sync" "gvisor.dev/gvisor/pkg/sentry/context" "gvisor.dev/gvisor/pkg/sentry/fs" @@ -24,6 +23,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/platform" "gvisor.dev/gvisor/pkg/sentry/safemem" "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sync" ) // 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 4e100a402..df7b74855 100644 --- a/pkg/sentry/fs/fsutil/inode.go +++ b/pkg/sentry/fs/fsutil/inode.go @@ -15,13 +15,13 @@ package fsutil import ( - "sync" - + "gvisor.dev/gvisor/pkg/abi/linux" "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/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) @@ -203,7 +203,7 @@ func (i *InodeSimpleAttributes) NotifyModificationAndStatusChange(ctx context.Co } // InodeSimpleExtendedAttributes implements -// fs.InodeOperations.{Get,Set,List}xattr. +// fs.InodeOperations.{Get,Set,List}Xattr. // // +stateify savable type InodeSimpleExtendedAttributes struct { @@ -212,8 +212,8 @@ type InodeSimpleExtendedAttributes struct { xattrs map[string]string } -// Getxattr implements fs.InodeOperations.Getxattr. -func (i *InodeSimpleExtendedAttributes) Getxattr(_ *fs.Inode, name string) (string, error) { +// GetXattr implements fs.InodeOperations.GetXattr. +func (i *InodeSimpleExtendedAttributes) GetXattr(_ context.Context, _ *fs.Inode, name string, _ uint64) (string, error) { i.mu.RLock() value, ok := i.xattrs[name] i.mu.RUnlock() @@ -223,19 +223,31 @@ func (i *InodeSimpleExtendedAttributes) Getxattr(_ *fs.Inode, name string) (stri return value, nil } -// Setxattr implements fs.InodeOperations.Setxattr. -func (i *InodeSimpleExtendedAttributes) Setxattr(_ *fs.Inode, name, value string) error { +// SetXattr implements fs.InodeOperations.SetXattr. +func (i *InodeSimpleExtendedAttributes) SetXattr(_ context.Context, _ *fs.Inode, name, value string, flags uint32) error { i.mu.Lock() + defer i.mu.Unlock() if i.xattrs == nil { + if flags&linux.XATTR_REPLACE != 0 { + return syserror.ENODATA + } i.xattrs = make(map[string]string) } + + _, ok := i.xattrs[name] + if ok && flags&linux.XATTR_CREATE != 0 { + return syserror.EEXIST + } + if !ok && flags&linux.XATTR_REPLACE != 0 { + return syserror.ENODATA + } + i.xattrs[name] = value - i.mu.Unlock() return nil } -// Listxattr implements fs.InodeOperations.Listxattr. -func (i *InodeSimpleExtendedAttributes) Listxattr(_ *fs.Inode) (map[string]struct{}, error) { +// ListXattr implements fs.InodeOperations.ListXattr. +func (i *InodeSimpleExtendedAttributes) ListXattr(context.Context, *fs.Inode) (map[string]struct{}, error) { i.mu.RLock() names := make(map[string]struct{}, len(i.xattrs)) for name := range i.xattrs { @@ -437,18 +449,18 @@ func (InodeNotSymlink) Getlink(context.Context, *fs.Inode) (*fs.Dirent, error) { // extended attributes. type InodeNoExtendedAttributes struct{} -// Getxattr implements fs.InodeOperations.Getxattr. -func (InodeNoExtendedAttributes) Getxattr(*fs.Inode, string) (string, error) { +// GetXattr implements fs.InodeOperations.GetXattr. +func (InodeNoExtendedAttributes) GetXattr(context.Context, *fs.Inode, string, uint64) (string, error) { return "", syserror.EOPNOTSUPP } -// Setxattr implements fs.InodeOperations.Setxattr. -func (InodeNoExtendedAttributes) Setxattr(*fs.Inode, string, string) error { +// SetXattr implements fs.InodeOperations.SetXattr. +func (InodeNoExtendedAttributes) SetXattr(context.Context, *fs.Inode, string, string, uint32) error { return syserror.EOPNOTSUPP } -// Listxattr implements fs.InodeOperations.Listxattr. -func (InodeNoExtendedAttributes) Listxattr(*fs.Inode) (map[string]struct{}, error) { +// ListXattr implements fs.InodeOperations.ListXattr. +func (InodeNoExtendedAttributes) ListXattr(context.Context, *fs.Inode) (map[string]struct{}, error) { return nil, syserror.EOPNOTSUPP } diff --git a/pkg/sentry/fs/fsutil/inode_cached.go b/pkg/sentry/fs/fsutil/inode_cached.go index 798920d18..20a014402 100644 --- a/pkg/sentry/fs/fsutil/inode_cached.go +++ b/pkg/sentry/fs/fsutil/inode_cached.go @@ -17,7 +17,6 @@ package fsutil import ( "fmt" "io" - "sync" "gvisor.dev/gvisor/pkg/log" "gvisor.dev/gvisor/pkg/sentry/context" @@ -30,6 +29,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/safemem" "gvisor.dev/gvisor/pkg/sentry/usage" "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sync" ) // Lock order (compare the lock order model in mm/mm.go): diff --git a/pkg/sentry/fs/gofer/BUILD b/pkg/sentry/fs/gofer/BUILD index 4a005c605..fd870e8e1 100644 --- a/pkg/sentry/fs/gofer/BUILD +++ b/pkg/sentry/fs/gofer/BUILD @@ -44,6 +44,7 @@ go_library( "//pkg/sentry/safemem", "//pkg/sentry/socket/unix/transport", "//pkg/sentry/usermem", + "//pkg/sync", "//pkg/syserr", "//pkg/syserror", "//pkg/unet", diff --git a/pkg/sentry/fs/gofer/context_file.go b/pkg/sentry/fs/gofer/context_file.go index 44b72582a..2125dafef 100644 --- a/pkg/sentry/fs/gofer/context_file.go +++ b/pkg/sentry/fs/gofer/context_file.go @@ -59,6 +59,20 @@ func (c *contextFile) setAttr(ctx context.Context, valid p9.SetAttrMask, attr p9 return err } +func (c *contextFile) getXattr(ctx context.Context, name string, size uint64) (string, error) { + ctx.UninterruptibleSleepStart(false) + val, err := c.file.GetXattr(name, size) + ctx.UninterruptibleSleepFinish(false) + return val, err +} + +func (c *contextFile) setXattr(ctx context.Context, name, value string, flags uint32) error { + ctx.UninterruptibleSleepStart(false) + err := c.file.SetXattr(name, value, flags) + ctx.UninterruptibleSleepFinish(false) + return err +} + func (c *contextFile) allocate(ctx context.Context, mode p9.AllocateMode, offset, length uint64) error { ctx.UninterruptibleSleepStart(false) err := c.file.Allocate(mode, offset, length) diff --git a/pkg/sentry/fs/gofer/inode.go b/pkg/sentry/fs/gofer/inode.go index 91263ebdc..98d1a8a48 100644 --- a/pkg/sentry/fs/gofer/inode.go +++ b/pkg/sentry/fs/gofer/inode.go @@ -16,7 +16,6 @@ package gofer import ( "errors" - "sync" "syscall" "gvisor.dev/gvisor/pkg/abi/linux" @@ -31,6 +30,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/fs/host" "gvisor.dev/gvisor/pkg/sentry/memmap" "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" ) @@ -38,8 +38,7 @@ import ( // // +stateify savable type inodeOperations struct { - fsutil.InodeNotVirtual `state:"nosave"` - fsutil.InodeNoExtendedAttributes `state:"nosave"` + fsutil.InodeNotVirtual `state:"nosave"` // fileState implements fs.CachedFileObject. It exists // to break a circular load dependency between inodeOperations @@ -604,6 +603,21 @@ func (i *inodeOperations) Truncate(ctx context.Context, inode *fs.Inode, length return i.fileState.file.setAttr(ctx, p9.SetAttrMask{Size: true}, p9.SetAttr{Size: uint64(length)}) } +// GetXattr implements fs.InodeOperations.GetXattr. +func (i *inodeOperations) GetXattr(ctx context.Context, inode *fs.Inode, name string, size uint64) (string, error) { + return i.fileState.file.getXattr(ctx, name, size) +} + +// SetXattr implements fs.InodeOperations.SetXattr. +func (i *inodeOperations) SetXattr(ctx context.Context, inode *fs.Inode, name string, value string, flags uint32) error { + return i.fileState.file.setXattr(ctx, name, value, flags) +} + +// ListXattr implements fs.InodeOperations.ListXattr. +func (i *inodeOperations) ListXattr(context.Context, *fs.Inode) (map[string]struct{}, error) { + return nil, syscall.EOPNOTSUPP +} + // Allocate implements fs.InodeOperations.Allocate. func (i *inodeOperations) Allocate(ctx context.Context, inode *fs.Inode, offset, length int64) error { // This can only be called for files anyway. diff --git a/pkg/sentry/fs/gofer/session.go b/pkg/sentry/fs/gofer/session.go index 4e358a46a..edc796ce0 100644 --- a/pkg/sentry/fs/gofer/session.go +++ b/pkg/sentry/fs/gofer/session.go @@ -16,7 +16,6 @@ package gofer import ( "fmt" - "sync" "gvisor.dev/gvisor/pkg/p9" "gvisor.dev/gvisor/pkg/refs" @@ -25,6 +24,7 @@ import ( "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/sync" "gvisor.dev/gvisor/pkg/unet" ) diff --git a/pkg/sentry/fs/host/BUILD b/pkg/sentry/fs/host/BUILD index 23daeb528..2b581aa69 100644 --- a/pkg/sentry/fs/host/BUILD +++ b/pkg/sentry/fs/host/BUILD @@ -50,6 +50,7 @@ go_library( "//pkg/sentry/unimpl", "//pkg/sentry/uniqueid", "//pkg/sentry/usermem", + "//pkg/sync", "//pkg/syserr", "//pkg/syserror", "//pkg/tcpip", diff --git a/pkg/sentry/fs/host/inode.go b/pkg/sentry/fs/host/inode.go index a6e4a09e3..873a1c52d 100644 --- a/pkg/sentry/fs/host/inode.go +++ b/pkg/sentry/fs/host/inode.go @@ -15,7 +15,6 @@ package host import ( - "sync" "syscall" "gvisor.dev/gvisor/pkg/abi/linux" @@ -28,6 +27,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/memmap" "gvisor.dev/gvisor/pkg/sentry/safemem" "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) diff --git a/pkg/sentry/fs/host/socket.go b/pkg/sentry/fs/host/socket.go index 107336a3e..c076d5bdd 100644 --- a/pkg/sentry/fs/host/socket.go +++ b/pkg/sentry/fs/host/socket.go @@ -16,7 +16,6 @@ package host import ( "fmt" - "sync" "syscall" "gvisor.dev/gvisor/pkg/abi/linux" @@ -30,6 +29,7 @@ import ( 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/sync" "gvisor.dev/gvisor/pkg/syserr" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/tcpip" diff --git a/pkg/sentry/fs/host/tty.go b/pkg/sentry/fs/host/tty.go index 90331e3b2..753ef8cd6 100644 --- a/pkg/sentry/fs/host/tty.go +++ b/pkg/sentry/fs/host/tty.go @@ -15,8 +15,6 @@ package host import ( - "sync" - "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/context" @@ -24,6 +22,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/unimpl" "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" ) diff --git a/pkg/sentry/fs/inode.go b/pkg/sentry/fs/inode.go index 91e2fde2f..e4cf5a570 100644 --- a/pkg/sentry/fs/inode.go +++ b/pkg/sentry/fs/inode.go @@ -15,8 +15,6 @@ package fs import ( - "sync" - "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/log" "gvisor.dev/gvisor/pkg/metric" @@ -26,6 +24,7 @@ import ( "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/sync" "gvisor.dev/gvisor/pkg/syserror" ) @@ -262,28 +261,28 @@ func (i *Inode) UnstableAttr(ctx context.Context) (UnstableAttr, error) { return i.InodeOperations.UnstableAttr(ctx, i) } -// Getxattr calls i.InodeOperations.Getxattr with i as the Inode. -func (i *Inode) Getxattr(name string) (string, error) { +// GetXattr calls i.InodeOperations.GetXattr with i as the Inode. +func (i *Inode) GetXattr(ctx context.Context, name string, size uint64) (string, error) { if i.overlay != nil { - return overlayGetxattr(i.overlay, name) + return overlayGetXattr(ctx, i.overlay, name, size) } - return i.InodeOperations.Getxattr(i, name) + return i.InodeOperations.GetXattr(ctx, i, name, size) } -// Setxattr calls i.InodeOperations.Setxattr with i as the Inode. -func (i *Inode) Setxattr(name, value string) error { +// SetXattr calls i.InodeOperations.SetXattr with i as the Inode. +func (i *Inode) SetXattr(ctx context.Context, d *Dirent, name, value string, flags uint32) error { if i.overlay != nil { - return overlaySetxattr(i.overlay, name, value) + return overlaySetxattr(ctx, i.overlay, d, name, value, flags) } - return i.InodeOperations.Setxattr(i, name, value) + return i.InodeOperations.SetXattr(ctx, i, name, value, flags) } -// Listxattr calls i.InodeOperations.Listxattr with i as the Inode. -func (i *Inode) Listxattr() (map[string]struct{}, error) { +// ListXattr calls i.InodeOperations.ListXattr with i as the Inode. +func (i *Inode) ListXattr(ctx context.Context) (map[string]struct{}, error) { if i.overlay != nil { - return overlayListxattr(i.overlay) + return overlayListXattr(ctx, i.overlay) } - return i.InodeOperations.Listxattr(i) + return i.InodeOperations.ListXattr(ctx, i) } // CheckPermission will check if the caller may access this file in the diff --git a/pkg/sentry/fs/inode_inotify.go b/pkg/sentry/fs/inode_inotify.go index 0f2a66a79..efd3c962b 100644 --- a/pkg/sentry/fs/inode_inotify.go +++ b/pkg/sentry/fs/inode_inotify.go @@ -16,7 +16,8 @@ package fs import ( "fmt" - "sync" + + "gvisor.dev/gvisor/pkg/sync" ) // Watches is the collection of inotify watches on an inode. diff --git a/pkg/sentry/fs/inode_operations.go b/pkg/sentry/fs/inode_operations.go index 5cde9d215..13261cb81 100644 --- a/pkg/sentry/fs/inode_operations.go +++ b/pkg/sentry/fs/inode_operations.go @@ -170,20 +170,27 @@ type InodeOperations interface { // file system events. UnstableAttr(ctx context.Context, inode *Inode) (UnstableAttr, error) - // Getxattr retrieves the value of extended attribute name. Inodes that - // do not support extended attributes return EOPNOTSUPP. Inodes that - // support extended attributes but don't have a value at name return + // GetXattr retrieves the value of extended attribute specified by name. + // Inodes that do not support extended attributes return EOPNOTSUPP. Inodes + // that support extended attributes but don't have a value at name return // ENODATA. - Getxattr(inode *Inode, name string) (string, error) + // + // If this is called through the getxattr(2) syscall, size indicates the + // size of the buffer that the application has allocated to hold the + // attribute value. If the value is larger than size, implementations may + // return ERANGE to indicate that the buffer is too small, but they are also + // free to ignore the hint entirely (i.e. the value returned may be larger + // than size). All size checking is done independently at the syscall layer. + GetXattr(ctx context.Context, inode *Inode, name string, size uint64) (string, error) - // Setxattr sets the value of extended attribute name. Inodes that - // do not support extended attributes return EOPNOTSUPP. - Setxattr(inode *Inode, name, value string) error + // SetXattr sets the value of extended attribute specified by name. Inodes + // that do not support extended attributes return EOPNOTSUPP. + SetXattr(ctx context.Context, inode *Inode, name, value string, flags uint32) error - // Listxattr returns the set of all extended attributes names that + // ListXattr returns the set of all extended attributes names that // have values. Inodes that do not support extended attributes return // EOPNOTSUPP. - Listxattr(inode *Inode) (map[string]struct{}, error) + ListXattr(ctx context.Context, inode *Inode) (map[string]struct{}, error) // Check determines whether an Inode can be accessed with the // requested permission mask using the context (which gives access diff --git a/pkg/sentry/fs/inode_overlay.go b/pkg/sentry/fs/inode_overlay.go index 13d11e001..c477de837 100644 --- a/pkg/sentry/fs/inode_overlay.go +++ b/pkg/sentry/fs/inode_overlay.go @@ -25,13 +25,13 @@ import ( "gvisor.dev/gvisor/pkg/syserror" ) -func overlayHasWhiteout(parent *Inode, name string) bool { - s, err := parent.Getxattr(XattrOverlayWhiteout(name)) +func overlayHasWhiteout(ctx context.Context, parent *Inode, name string) bool { + s, err := parent.GetXattr(ctx, XattrOverlayWhiteout(name), 1) return err == nil && s == "y" } -func overlayCreateWhiteout(parent *Inode, name string) error { - return parent.InodeOperations.Setxattr(parent, XattrOverlayWhiteout(name), "y") +func overlayCreateWhiteout(ctx context.Context, parent *Inode, name string) error { + return parent.InodeOperations.SetXattr(ctx, parent, XattrOverlayWhiteout(name), "y", 0 /* flags */) } func overlayWriteOut(ctx context.Context, o *overlayEntry) error { @@ -89,7 +89,7 @@ func overlayLookup(ctx context.Context, parent *overlayEntry, inode *Inode, name } // Are we done? - if overlayHasWhiteout(parent.upper, name) { + if overlayHasWhiteout(ctx, parent.upper, name) { if upperInode == nil { parent.copyMu.RUnlock() if negativeUpperChild { @@ -345,7 +345,7 @@ func overlayRemove(ctx context.Context, o *overlayEntry, parent *Dirent, child * } } if child.Inode.overlay.lowerExists { - if err := overlayCreateWhiteout(o.upper, child.name); err != nil { + if err := overlayCreateWhiteout(ctx, o.upper, child.name); err != nil { return err } } @@ -426,7 +426,7 @@ func overlayRename(ctx context.Context, o *overlayEntry, oldParent *Dirent, rena return err } if renamed.Inode.overlay.lowerExists { - if err := overlayCreateWhiteout(oldParent.Inode.overlay.upper, oldName); err != nil { + if err := overlayCreateWhiteout(ctx, oldParent.Inode.overlay.upper, oldName); err != nil { return err } } @@ -528,7 +528,7 @@ func overlayUnstableAttr(ctx context.Context, o *overlayEntry) (UnstableAttr, er return attr, err } -func overlayGetxattr(o *overlayEntry, name string) (string, error) { +func overlayGetXattr(ctx context.Context, o *overlayEntry, name string, size uint64) (string, error) { // Hot path. This is how the overlay checks for whiteout files. // Avoid defers. var ( @@ -544,31 +544,38 @@ func overlayGetxattr(o *overlayEntry, name string) (string, error) { o.copyMu.RLock() if o.upper != nil { - s, err = o.upper.Getxattr(name) + s, err = o.upper.GetXattr(ctx, name, size) } else { - s, err = o.lower.Getxattr(name) + s, err = o.lower.GetXattr(ctx, name, size) } o.copyMu.RUnlock() return s, err } -// TODO(b/146028302): Support setxattr for overlayfs. -func overlaySetxattr(o *overlayEntry, name, value string) error { - return syserror.EOPNOTSUPP +func overlaySetxattr(ctx context.Context, o *overlayEntry, d *Dirent, name, value string, flags uint32) error { + // Don't allow changes to overlay xattrs through a setxattr syscall. + if strings.HasPrefix(XattrOverlayPrefix, name) { + return syserror.EPERM + } + + if err := copyUp(ctx, d); err != nil { + return err + } + return o.upper.SetXattr(ctx, d, name, value, flags) } -func overlayListxattr(o *overlayEntry) (map[string]struct{}, error) { +func overlayListXattr(ctx context.Context, o *overlayEntry) (map[string]struct{}, error) { o.copyMu.RLock() defer o.copyMu.RUnlock() var names map[string]struct{} var err error if o.upper != nil { - names, err = o.upper.Listxattr() + names, err = o.upper.ListXattr(ctx) } else { - names, err = o.lower.Listxattr() + names, err = o.lower.ListXattr(ctx) } for name := range names { - // Same as overlayGetxattr, we shouldn't forward along + // Same as overlayGetXattr, we shouldn't forward along // overlay attributes. if strings.HasPrefix(XattrOverlayPrefix, name) { delete(names, name) diff --git a/pkg/sentry/fs/inode_overlay_test.go b/pkg/sentry/fs/inode_overlay_test.go index 8935aad65..493d98c36 100644 --- a/pkg/sentry/fs/inode_overlay_test.go +++ b/pkg/sentry/fs/inode_overlay_test.go @@ -382,8 +382,8 @@ type dir struct { ReaddirCalled bool } -// Getxattr implements InodeOperations.Getxattr. -func (d *dir) Getxattr(inode *fs.Inode, name string) (string, error) { +// GetXattr implements InodeOperations.GetXattr. +func (d *dir) GetXattr(_ context.Context, _ *fs.Inode, name string, _ uint64) (string, error) { for _, n := range d.negative { if name == fs.XattrOverlayWhiteout(n) { return "y", nil diff --git a/pkg/sentry/fs/inotify.go b/pkg/sentry/fs/inotify.go index ba3e0233d..cc7dd1c92 100644 --- a/pkg/sentry/fs/inotify.go +++ b/pkg/sentry/fs/inotify.go @@ -16,7 +16,6 @@ package fs import ( "io" - "sync" "sync/atomic" "gvisor.dev/gvisor/pkg/abi/linux" @@ -25,6 +24,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/memmap" "gvisor.dev/gvisor/pkg/sentry/uniqueid" "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) diff --git a/pkg/sentry/fs/inotify_watch.go b/pkg/sentry/fs/inotify_watch.go index 0aa0a5e9b..900cba3ca 100644 --- a/pkg/sentry/fs/inotify_watch.go +++ b/pkg/sentry/fs/inotify_watch.go @@ -15,10 +15,10 @@ package fs import ( - "sync" "sync/atomic" "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sync" ) // 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 8d62642e7..2c332a82a 100644 --- a/pkg/sentry/fs/lock/BUILD +++ b/pkg/sentry/fs/lock/BUILD @@ -44,6 +44,7 @@ go_library( visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/log", + "//pkg/sync", "//pkg/waiter", ], ) diff --git a/pkg/sentry/fs/lock/lock.go b/pkg/sentry/fs/lock/lock.go index 636484424..926538d90 100644 --- a/pkg/sentry/fs/lock/lock.go +++ b/pkg/sentry/fs/lock/lock.go @@ -52,9 +52,9 @@ package lock import ( "fmt" "math" - "sync" "syscall" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/waiter" ) @@ -78,6 +78,9 @@ const ( ) // LockEOF is the maximal possible end of a regional file lock. +// +// A BSD-style full file lock can be represented as a regional file lock from +// offset 0 to LockEOF. const LockEOF = math.MaxUint64 // Lock is a regional file lock. It consists of either a single writer diff --git a/pkg/sentry/fs/mounts.go b/pkg/sentry/fs/mounts.go index ac0398bd9..db3dfd096 100644 --- a/pkg/sentry/fs/mounts.go +++ b/pkg/sentry/fs/mounts.go @@ -19,7 +19,6 @@ import ( "math" "path" "strings" - "sync" "syscall" "gvisor.dev/gvisor/pkg/abi/linux" @@ -27,6 +26,7 @@ import ( "gvisor.dev/gvisor/pkg/refs" "gvisor.dev/gvisor/pkg/sentry/context" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" ) diff --git a/pkg/sentry/fs/overlay.go b/pkg/sentry/fs/overlay.go index 25573e986..4cad55327 100644 --- a/pkg/sentry/fs/overlay.go +++ b/pkg/sentry/fs/overlay.go @@ -17,13 +17,12 @@ package fs import ( "fmt" "strings" - "sync" "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/syncutil" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" ) @@ -199,7 +198,7 @@ type overlayEntry struct { upper *Inode // dirCacheMu protects dirCache. - dirCacheMu syncutil.DowngradableRWMutex `state:"nosave"` + dirCacheMu sync.DowngradableRWMutex `state:"nosave"` // dirCache is cache of DentAttrs from upper and lower Inodes. dirCache *SortedDentryMap diff --git a/pkg/sentry/fs/proc/BUILD b/pkg/sentry/fs/proc/BUILD index 75cbb0622..cb37c6c6b 100644 --- a/pkg/sentry/fs/proc/BUILD +++ b/pkg/sentry/fs/proc/BUILD @@ -18,7 +18,6 @@ go_library( "mounts.go", "net.go", "proc.go", - "rpcinet_proc.go", "stat.go", "sys.go", "sys_net.go", @@ -46,11 +45,11 @@ go_library( "//pkg/sentry/limits", "//pkg/sentry/mm", "//pkg/sentry/socket", - "//pkg/sentry/socket/rpcinet", "//pkg/sentry/socket/unix", "//pkg/sentry/socket/unix/transport", "//pkg/sentry/usage", "//pkg/sentry/usermem", + "//pkg/sync", "//pkg/syserror", "//pkg/tcpip/header", "//pkg/waiter", diff --git a/pkg/sentry/fs/proc/cgroup.go b/pkg/sentry/fs/proc/cgroup.go index 05e31c55d..c4abe319d 100644 --- a/pkg/sentry/fs/proc/cgroup.go +++ b/pkg/sentry/fs/proc/cgroup.go @@ -21,6 +21,8 @@ import ( "gvisor.dev/gvisor/pkg/sentry/fs" ) +// LINT.IfChange + func newCGroupInode(ctx context.Context, msrc *fs.MountSource, cgroupControllers map[string]string) *fs.Inode { // From man 7 cgroups: "For each cgroup hierarchy of which the process // is a member, there is one entry containing three colon-separated @@ -39,3 +41,5 @@ func newCGroupInode(ctx context.Context, msrc *fs.MountSource, cgroupControllers return newStaticProcInode(ctx, msrc, []byte(data)) } + +// LINT.ThenChange(../../fsimpl/proc/tasks_files.go) diff --git a/pkg/sentry/fs/proc/cpuinfo.go b/pkg/sentry/fs/proc/cpuinfo.go index 3edf36780..df0c4e3a7 100644 --- a/pkg/sentry/fs/proc/cpuinfo.go +++ b/pkg/sentry/fs/proc/cpuinfo.go @@ -15,11 +15,15 @@ package proc import ( + "bytes" + "gvisor.dev/gvisor/pkg/sentry/context" "gvisor.dev/gvisor/pkg/sentry/fs" "gvisor.dev/gvisor/pkg/sentry/kernel" ) +// LINT.IfChange + func newCPUInfo(ctx context.Context, msrc *fs.MountSource) *fs.Inode { k := kernel.KernelFromContext(ctx) features := k.FeatureSet() @@ -27,9 +31,11 @@ func newCPUInfo(ctx context.Context, msrc *fs.MountSource) *fs.Inode { // Kernel is always initialized with a FeatureSet. panic("cpuinfo read with nil FeatureSet") } - contents := make([]byte, 0, 1024) + var buf bytes.Buffer for i, max := uint(0), k.ApplicationCores(); i < max; i++ { - contents = append(contents, []byte(features.CPUInfo(i))...) + features.WriteCPUInfoTo(i, &buf) } - return newStaticProcInode(ctx, msrc, contents) + return newStaticProcInode(ctx, msrc, buf.Bytes()) } + +// LINT.ThenChange(../../fsimpl/proc/tasks_files.go) diff --git a/pkg/sentry/fs/proc/exec_args.go b/pkg/sentry/fs/proc/exec_args.go index 1d3a2d426..9aaeb780b 100644 --- a/pkg/sentry/fs/proc/exec_args.go +++ b/pkg/sentry/fs/proc/exec_args.go @@ -29,6 +29,8 @@ import ( "gvisor.dev/gvisor/pkg/waiter" ) +// LINT.IfChange + // execArgType enumerates the types of exec arguments that are exposed through // proc. type execArgType int @@ -201,3 +203,5 @@ func (f *execArgFile) Read(ctx context.Context, _ *fs.File, dst usermem.IOSequen } return int64(n), err } + +// LINT.ThenChange(../../fsimpl/proc/task.go) diff --git a/pkg/sentry/fs/proc/fds.go b/pkg/sentry/fs/proc/fds.go index bee421d76..2fa3cfa7d 100644 --- a/pkg/sentry/fs/proc/fds.go +++ b/pkg/sentry/fs/proc/fds.go @@ -28,6 +28,8 @@ import ( "gvisor.dev/gvisor/pkg/syserror" ) +// LINT.IfChange + // walkDescriptors finds the descriptor (file-flag pair) for the fd identified // by p, and calls the toInodeOperations callback with that descriptor. This is a helper // method for implementing fs.InodeOperations.Lookup. @@ -277,3 +279,5 @@ func (fdid *fdInfoDir) GetFile(ctx context.Context, dirent *fs.Dirent, flags fs. } return fs.NewFile(ctx, dirent, flags, fops), nil } + +// LINT.ThenChange(../../fsimpl/proc/task_files.go) diff --git a/pkg/sentry/fs/proc/filesystems.go b/pkg/sentry/fs/proc/filesystems.go index e9250c51c..7b3b974ab 100644 --- a/pkg/sentry/fs/proc/filesystems.go +++ b/pkg/sentry/fs/proc/filesystems.go @@ -23,6 +23,8 @@ import ( "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" ) +// LINT.IfChange + // filesystemsData backs /proc/filesystems. // // +stateify savable @@ -59,3 +61,5 @@ func (*filesystemsData) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle // Return the SeqData and advance the generation counter. return []seqfile.SeqData{{Buf: buf.Bytes(), Handle: (*filesystemsData)(nil)}}, 1 } + +// LINT.ThenChange(../../fsimpl/proc/filesystem.go) diff --git a/pkg/sentry/fs/proc/fs.go b/pkg/sentry/fs/proc/fs.go index f14833805..761d24462 100644 --- a/pkg/sentry/fs/proc/fs.go +++ b/pkg/sentry/fs/proc/fs.go @@ -21,6 +21,8 @@ import ( "gvisor.dev/gvisor/pkg/sentry/fs" ) +// LINT.IfChange + // filesystem is a procfs. // // +stateify savable @@ -79,3 +81,5 @@ func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSou // never want them cached. return New(ctx, fs.NewNonCachingMountSource(ctx, f, flags), cgroups) } + +// LINT.ThenChange(../../fsimpl/proc/filesystem.go) diff --git a/pkg/sentry/fs/proc/inode.go b/pkg/sentry/fs/proc/inode.go index 0c04f81fa..723f6b661 100644 --- a/pkg/sentry/fs/proc/inode.go +++ b/pkg/sentry/fs/proc/inode.go @@ -26,6 +26,8 @@ import ( "gvisor.dev/gvisor/pkg/sentry/usermem" ) +// LINT.IfChange + // taskOwnedInodeOps wraps an fs.InodeOperations and overrides the UnstableAttr // method to return either the task or root as the owner, depending on the // task's dumpability. @@ -131,3 +133,5 @@ func newProcInode(ctx context.Context, iops fs.InodeOperations, msrc *fs.MountSo } return fs.NewInode(ctx, iops, msrc, sattr) } + +// LINT.ThenChange(../../fsimpl/proc/tasks.go) diff --git a/pkg/sentry/fs/proc/loadavg.go b/pkg/sentry/fs/proc/loadavg.go index 8602b7426..d7d2afcb7 100644 --- a/pkg/sentry/fs/proc/loadavg.go +++ b/pkg/sentry/fs/proc/loadavg.go @@ -22,6 +22,8 @@ import ( "gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile" ) +// LINT.IfChange + // loadavgData backs /proc/loadavg. // // +stateify savable @@ -53,3 +55,5 @@ func (d *loadavgData) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) }, }, 0 } + +// LINT.ThenChange(../../fsimpl/proc/tasks_files.go) diff --git a/pkg/sentry/fs/proc/meminfo.go b/pkg/sentry/fs/proc/meminfo.go index 495f3e3ba..313c6a32b 100644 --- a/pkg/sentry/fs/proc/meminfo.go +++ b/pkg/sentry/fs/proc/meminfo.go @@ -25,6 +25,8 @@ import ( "gvisor.dev/gvisor/pkg/sentry/usermem" ) +// LINT.IfChange + // meminfoData backs /proc/meminfo. // // +stateify savable @@ -83,3 +85,5 @@ func (d *meminfoData) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) fmt.Fprintf(&buf, "Shmem: %8d kB\n", snapshot.Tmpfs/1024) return []seqfile.SeqData{{Buf: buf.Bytes(), Handle: (*meminfoData)(nil)}}, 0 } + +// LINT.ThenChange(../../fsimpl/proc/tasks_files.go) diff --git a/pkg/sentry/fs/proc/mounts.go b/pkg/sentry/fs/proc/mounts.go index e33c4a460..5aedae799 100644 --- a/pkg/sentry/fs/proc/mounts.go +++ b/pkg/sentry/fs/proc/mounts.go @@ -25,6 +25,8 @@ import ( "gvisor.dev/gvisor/pkg/sentry/kernel" ) +// LINT.IfChange + // forEachMountSource runs f for the process root mount and each mount that is a // descendant of the root. func forEachMount(t *kernel.Task, fn func(string, *fs.Mount)) { @@ -195,3 +197,5 @@ func (mf *mountsFile) ReadSeqFileData(ctx context.Context, handle seqfile.SeqHan return []seqfile.SeqData{{Buf: buf.Bytes(), Handle: (*mountsFile)(nil)}}, 0 } + +// LINT.ThenChange(../../fsimpl/proc/tasks_files.go) diff --git a/pkg/sentry/fs/proc/net.go b/pkg/sentry/fs/proc/net.go index 402919924..3f17e98ea 100644 --- a/pkg/sentry/fs/proc/net.go +++ b/pkg/sentry/fs/proc/net.go @@ -38,6 +38,8 @@ import ( "gvisor.dev/gvisor/pkg/tcpip/header" ) +// LINT.IfChange + // newNet creates a new proc net entry. func (p *proc) newNetDir(ctx context.Context, k *kernel.Kernel, msrc *fs.MountSource) *fs.Inode { var contents map[string]*fs.Inode @@ -831,3 +833,5 @@ func (n *netUDP) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ([]se } return data, 0 } + +// LINT.ThenChange(../../fsimpl/proc/tasks_net.go) diff --git a/pkg/sentry/fs/proc/proc.go b/pkg/sentry/fs/proc/proc.go index 56e92721e..29867dc3a 100644 --- a/pkg/sentry/fs/proc/proc.go +++ b/pkg/sentry/fs/proc/proc.go @@ -27,10 +27,11 @@ import ( "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" ) +// LINT.IfChange + // proc is a root proc node. // // +stateify savable @@ -85,15 +86,9 @@ func New(ctx context.Context, msrc *fs.MountSource, cgroupControllers map[string } // Add more contents that need proc to be initialized. + p.AddChild(ctx, "net", p.newNetDir(ctx, k, msrc)) p.AddChild(ctx, "sys", p.newSysDir(ctx, msrc)) - // If we're using rpcinet we will let it manage /proc/net. - if _, ok := p.k.NetworkStack().(*rpcinet.Stack); ok { - p.AddChild(ctx, "net", newRPCInetProcNet(ctx, msrc)) - } else { - p.AddChild(ctx, "net", p.newNetDir(ctx, k, msrc)) - } - return newProcInode(ctx, p, msrc, fs.SpecialDirectory, nil), nil } @@ -249,3 +244,5 @@ func (rpf *rootProcFile) Readdir(ctx context.Context, file *fs.File, ser fs.Dent } return offset, nil } + +// LINT.ThenChange(../../fsimpl/proc/tasks.go) diff --git a/pkg/sentry/fs/proc/rpcinet_proc.go b/pkg/sentry/fs/proc/rpcinet_proc.go deleted file mode 100644 index 01ac97530..000000000 --- a/pkg/sentry/fs/proc/rpcinet_proc.go +++ /dev/null @@ -1,217 +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 proc - -import ( - "io" - - "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 implements fs.InodeOperations. -type rpcInetInode struct { - fsutil.SimpleFileInode - - // filepath is the full path of this rpcInetInode. - filepath string - - k *kernel.Kernel -} - -func newRPCInetInode(ctx context.Context, msrc *fs.MountSource, filepath string, mode linux.FileMode) *fs.Inode { - f := &rpcInetInode{ - SimpleFileInode: *fsutil.NewSimpleFileInode(ctx, fs.RootOwner, fs.FilePermsFromMode(mode), linux.PROC_SUPER_MAGIC), - filepath: filepath, - k: kernel.KernelFromContext(ctx), - } - return newProcInode(ctx, f, msrc, fs.SpecialFile, nil) -} - -// GetFile implements fs.InodeOperations.GetFile. -func (i *rpcInetInode) GetFile(ctx context.Context, dirent *fs.Dirent, flags fs.FileFlags) (*fs.File, error) { - flags.Pread = true - flags.Pwrite = true - fops := &rpcInetFile{ - inode: i, - } - return fs.NewFile(ctx, dirent, flags, fops), nil -} - -// rpcInetFile implements fs.FileOperations as RPCs. -type rpcInetFile struct { - fsutil.FileGenericSeek `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.FileNotDirReaddir `state:"nosave"` - fsutil.FileUseInodeUnstableAttr `state:"nosave"` - waiter.AlwaysReady `state:"nosave"` - - inode *rpcInetInode -} - -// Read implements fs.FileOperations.Read. -// -// This method can panic if an rpcInetInode was created without an rpcinet -// stack. -func (f *rpcInetFile) Read(ctx context.Context, file *fs.File, dst usermem.IOSequence, offset int64) (int64, error) { - if offset < 0 { - return 0, syserror.EINVAL - } - s, ok := f.inode.k.NetworkStack().(*rpcinet.Stack) - if !ok { - panic("Network stack is not a rpcinet.") - } - - contents, se := s.RPCReadFile(f.inode.filepath) - if se != nil || offset >= int64(len(contents)) { - return 0, io.EOF - } - - n, err := dst.CopyOut(ctx, contents[offset:]) - return int64(n), err -} - -// Write implements fs.FileOperations.Write. -// -// This method can panic if an rpcInetInode was created without an rpcInet -// stack. -func (f *rpcInetFile) Write(ctx context.Context, file *fs.File, src usermem.IOSequence, offset int64) (int64, error) { - s, ok := f.inode.k.NetworkStack().(*rpcinet.Stack) - if !ok { - panic("Network stack is not a rpcinet.") - } - - if src.NumBytes() == 0 { - return 0, nil - } - - b := make([]byte, src.NumBytes(), src.NumBytes()) - n, err := src.CopyIn(ctx, b) - if err != nil { - return int64(n), err - } - - written, se := s.RPCWriteFile(f.inode.filepath, b) - return int64(written), se.ToError() -} - -// newRPCInetProcNet will build an inode for /proc/net. -func newRPCInetProcNet(ctx context.Context, msrc *fs.MountSource) *fs.Inode { - contents := map[string]*fs.Inode{ - "arp": newRPCInetInode(ctx, msrc, "/proc/net/arp", 0444), - "dev": newRPCInetInode(ctx, msrc, "/proc/net/dev", 0444), - "if_inet6": newRPCInetInode(ctx, msrc, "/proc/net/if_inet6", 0444), - "ipv6_route": newRPCInetInode(ctx, msrc, "/proc/net/ipv6_route", 0444), - "netlink": newRPCInetInode(ctx, msrc, "/proc/net/netlink", 0444), - "netstat": newRPCInetInode(ctx, msrc, "/proc/net/netstat", 0444), - "packet": newRPCInetInode(ctx, msrc, "/proc/net/packet", 0444), - "protocols": newRPCInetInode(ctx, msrc, "/proc/net/protocols", 0444), - "psched": newRPCInetInode(ctx, msrc, "/proc/net/psched", 0444), - "ptype": newRPCInetInode(ctx, msrc, "/proc/net/ptype", 0444), - "route": newRPCInetInode(ctx, msrc, "/proc/net/route", 0444), - "tcp": newRPCInetInode(ctx, msrc, "/proc/net/tcp", 0444), - "tcp6": newRPCInetInode(ctx, msrc, "/proc/net/tcp6", 0444), - "udp": newRPCInetInode(ctx, msrc, "/proc/net/udp", 0444), - "udp6": newRPCInetInode(ctx, msrc, "/proc/net/udp6", 0444), - } - - d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) -} - -// newRPCInetProcSysNet will build an inode for /proc/sys/net. -func newRPCInetProcSysNet(ctx context.Context, msrc *fs.MountSource) *fs.Inode { - contents := map[string]*fs.Inode{ - "ipv4": newRPCInetSysNetIPv4Dir(ctx, msrc), - "core": newRPCInetSysNetCore(ctx, msrc), - } - - d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) -} - -// newRPCInetSysNetCore builds the /proc/sys/net/core directory. -func newRPCInetSysNetCore(ctx context.Context, msrc *fs.MountSource) *fs.Inode { - contents := map[string]*fs.Inode{ - "default_qdisc": newRPCInetInode(ctx, msrc, "/proc/sys/net/core/default_qdisc", 0444), - "message_burst": newRPCInetInode(ctx, msrc, "/proc/sys/net/core/message_burst", 0444), - "message_cost": newRPCInetInode(ctx, msrc, "/proc/sys/net/core/message_cost", 0444), - "optmem_max": newRPCInetInode(ctx, msrc, "/proc/sys/net/core/optmem_max", 0444), - "rmem_default": newRPCInetInode(ctx, msrc, "/proc/sys/net/core/rmem_default", 0444), - "rmem_max": newRPCInetInode(ctx, msrc, "/proc/sys/net/core/rmem_max", 0444), - "somaxconn": newRPCInetInode(ctx, msrc, "/proc/sys/net/core/somaxconn", 0444), - "wmem_default": newRPCInetInode(ctx, msrc, "/proc/sys/net/core/wmem_default", 0444), - "wmem_max": newRPCInetInode(ctx, msrc, "/proc/sys/net/core/wmem_max", 0444), - } - - d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) -} - -// newRPCInetSysNetIPv4Dir builds the /proc/sys/net/ipv4 directory. -func newRPCInetSysNetIPv4Dir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { - contents := map[string]*fs.Inode{ - "ip_local_port_range": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/ip_local_port_range", 0444), - "ip_local_reserved_ports": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/ip_local_reserved_ports", 0444), - "ipfrag_time": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/ipfrag_time", 0444), - "ip_nonlocal_bind": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/ip_nonlocal_bind", 0444), - "ip_no_pmtu_disc": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/ip_no_pmtu_disc", 0444), - "tcp_allowed_congestion_control": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_allowed_congestion_control", 0444), - "tcp_available_congestion_control": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_available_congestion_control", 0444), - "tcp_base_mss": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_base_mss", 0444), - "tcp_congestion_control": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_congestion_control", 0644), - "tcp_dsack": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_dsack", 0644), - "tcp_early_retrans": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_early_retrans", 0644), - "tcp_fack": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_fack", 0644), - "tcp_fastopen": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_fastopen", 0644), - "tcp_fastopen_key": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_fastopen_key", 0444), - "tcp_fin_timeout": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_fin_timeout", 0644), - "tcp_invalid_ratelimit": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_invalid_ratelimit", 0444), - "tcp_keepalive_intvl": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_keepalive_intvl", 0644), - "tcp_keepalive_probes": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_keepalive_probes", 0644), - "tcp_keepalive_time": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_keepalive_time", 0644), - "tcp_mem": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_mem", 0444), - "tcp_mtu_probing": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_mtu_probing", 0644), - "tcp_no_metrics_save": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_no_metrics_save", 0444), - "tcp_probe_interval": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_probe_interval", 0444), - "tcp_probe_threshold": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_probe_threshold", 0444), - "tcp_retries1": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_retries1", 0644), - "tcp_retries2": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_retries2", 0644), - "tcp_rfc1337": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_rfc1337", 0444), - "tcp_rmem": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_rmem", 0444), - "tcp_sack": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_sack", 0644), - "tcp_slow_start_after_idle": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_slow_start_after_idle", 0644), - "tcp_synack_retries": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_synack_retries", 0644), - "tcp_syn_retries": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_syn_retries", 0644), - "tcp_timestamps": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_timestamps", 0644), - "tcp_wmem": newRPCInetInode(ctx, msrc, "/proc/sys/net/ipv4/tcp_wmem", 0444), - } - - d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) - 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 fe7067be1..38b246dff 100644 --- a/pkg/sentry/fs/proc/seqfile/BUILD +++ b/pkg/sentry/fs/proc/seqfile/BUILD @@ -16,6 +16,7 @@ go_library( "//pkg/sentry/fs/proc/device", "//pkg/sentry/kernel/time", "//pkg/sentry/usermem", + "//pkg/sync", "//pkg/syserror", "//pkg/waiter", ], diff --git a/pkg/sentry/fs/proc/seqfile/seqfile.go b/pkg/sentry/fs/proc/seqfile/seqfile.go index 5fe823000..f9af191d5 100644 --- a/pkg/sentry/fs/proc/seqfile/seqfile.go +++ b/pkg/sentry/fs/proc/seqfile/seqfile.go @@ -17,7 +17,6 @@ package seqfile import ( "io" - "sync" "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/sentry/context" @@ -26,6 +25,7 @@ import ( "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/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) diff --git a/pkg/sentry/fs/proc/stat.go b/pkg/sentry/fs/proc/stat.go index b641effbb..bc5b2bc7b 100644 --- a/pkg/sentry/fs/proc/stat.go +++ b/pkg/sentry/fs/proc/stat.go @@ -24,6 +24,8 @@ import ( "gvisor.dev/gvisor/pkg/sentry/kernel" ) +// LINT.IfChange + // statData backs /proc/stat. // // +stateify savable @@ -140,3 +142,5 @@ func (s *statData) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ([] }, }, 0 } + +// LINT.ThenChange(../../fsimpl/proc/task_files.go) diff --git a/pkg/sentry/fs/proc/sys.go b/pkg/sentry/fs/proc/sys.go index cd37776c8..2bdcf5f70 100644 --- a/pkg/sentry/fs/proc/sys.go +++ b/pkg/sentry/fs/proc/sys.go @@ -26,11 +26,12 @@ import ( "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" ) +// LINT.IfChange + // mmapMinAddrData backs /proc/sys/vm/mmap_min_addr. // // +stateify savable @@ -104,16 +105,10 @@ func (p *proc) newVMDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { func (p *proc) newSysDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { children := map[string]*fs.Inode{ "kernel": p.newKernelDir(ctx, msrc), + "net": p.newSysNetDir(ctx, msrc), "vm": p.newVMDir(ctx, msrc), } - // If we're using rpcinet we will let it manage /proc/sys/net. - if _, ok := p.k.NetworkStack().(*rpcinet.Stack); ok { - children["net"] = newRPCInetProcSysNet(ctx, msrc) - } else { - children["net"] = p.newSysNetDir(ctx, msrc) - } - d := ramfs.NewDir(ctx, children, fs.RootOwner, fs.FilePermsFromMode(0555)) return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } @@ -160,3 +155,5 @@ func (hf *hostnameFile) Read(ctx context.Context, _ *fs.File, dst usermem.IOSequ } var _ fs.FileOperations = (*hostnameFile)(nil) + +// LINT.ThenChange(../../fsimpl/proc/tasks_sys.go) diff --git a/pkg/sentry/fs/proc/sys_net.go b/pkg/sentry/fs/proc/sys_net.go index bd93f83fa..b9e8ef35f 100644 --- a/pkg/sentry/fs/proc/sys_net.go +++ b/pkg/sentry/fs/proc/sys_net.go @@ -17,7 +17,6 @@ package proc import ( "fmt" "io" - "sync" "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/sentry/context" @@ -27,9 +26,12 @@ import ( "gvisor.dev/gvisor/pkg/sentry/fs/ramfs" "gvisor.dev/gvisor/pkg/sentry/inet" "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/waiter" ) +// LINT.IfChange + type tcpMemDir int const ( @@ -364,3 +366,5 @@ func (p *proc) newSysNetDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil) } + +// LINT.ThenChange(../../fsimpl/proc/tasks_sys.go) diff --git a/pkg/sentry/fs/proc/task.go b/pkg/sentry/fs/proc/task.go index 9bf4b4527..7358d6ef9 100644 --- a/pkg/sentry/fs/proc/task.go +++ b/pkg/sentry/fs/proc/task.go @@ -37,6 +37,8 @@ import ( "gvisor.dev/gvisor/pkg/waiter" ) +// LINT.IfChange + // getTaskMM returns t's MemoryManager. If getTaskMM succeeds, the MemoryManager's // users count is incremented, and must be decremented by the caller when it is // no longer in use. @@ -800,3 +802,5 @@ func (f *auxvecFile) Read(ctx context.Context, _ *fs.File, dst usermem.IOSequenc n, err := dst.CopyOut(ctx, buf[offset:]) return int64(n), err } + +// LINT.ThenChange(../../fsimpl/proc/task.go|../../fsimpl/proc/task_files.go) diff --git a/pkg/sentry/fs/proc/uid_gid_map.go b/pkg/sentry/fs/proc/uid_gid_map.go index eea37d15c..3eacc9265 100644 --- a/pkg/sentry/fs/proc/uid_gid_map.go +++ b/pkg/sentry/fs/proc/uid_gid_map.go @@ -30,6 +30,8 @@ import ( "gvisor.dev/gvisor/pkg/waiter" ) +// LINT.IfChange + // idMapInodeOperations implements fs.InodeOperations for // /proc/[pid]/{uid,gid}_map. // @@ -177,3 +179,5 @@ func (imfo *idMapFileOperations) Write(ctx context.Context, file *fs.File, src u // count, even if fewer bytes were used. return int64(srclen), nil } + +// LINT.ThenChange(../../fsimpl/proc/task_files.go) diff --git a/pkg/sentry/fs/proc/uptime.go b/pkg/sentry/fs/proc/uptime.go index 4e903917a..adfe58adb 100644 --- a/pkg/sentry/fs/proc/uptime.go +++ b/pkg/sentry/fs/proc/uptime.go @@ -28,6 +28,8 @@ import ( "gvisor.dev/gvisor/pkg/waiter" ) +// LINT.IfChange + // uptime is a file containing the system uptime. // // +stateify savable @@ -85,3 +87,5 @@ func (f *uptimeFile) Read(ctx context.Context, _ *fs.File, dst usermem.IOSequenc n, err := dst.CopyOut(ctx, s[offset:]) return int64(n), err } + +// LINT.ThenChange(../../fsimpl/proc/tasks_files.go) diff --git a/pkg/sentry/fs/proc/version.go b/pkg/sentry/fs/proc/version.go index a6d2c3cd3..27fd5b1cb 100644 --- a/pkg/sentry/fs/proc/version.go +++ b/pkg/sentry/fs/proc/version.go @@ -22,6 +22,8 @@ import ( "gvisor.dev/gvisor/pkg/sentry/kernel" ) +// LINT.IfChange + // versionData backs /proc/version. // // +stateify savable @@ -76,3 +78,5 @@ func (v *versionData) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) }, }, 0 } + +// LINT.ThenChange(../../fsimpl/proc/task_files.go) diff --git a/pkg/sentry/fs/ramfs/BUILD b/pkg/sentry/fs/ramfs/BUILD index 012cb3e44..3fb7b0633 100644 --- a/pkg/sentry/fs/ramfs/BUILD +++ b/pkg/sentry/fs/ramfs/BUILD @@ -21,6 +21,7 @@ go_library( "//pkg/sentry/fs/fsutil", "//pkg/sentry/socket/unix/transport", "//pkg/sentry/usermem", + "//pkg/sync", "//pkg/syserror", "//pkg/waiter", ], diff --git a/pkg/sentry/fs/ramfs/dir.go b/pkg/sentry/fs/ramfs/dir.go index 78e082b8e..dcbb8eb2e 100644 --- a/pkg/sentry/fs/ramfs/dir.go +++ b/pkg/sentry/fs/ramfs/dir.go @@ -17,7 +17,6 @@ package ramfs import ( "fmt" - "sync" "syscall" "gvisor.dev/gvisor/pkg/abi/linux" @@ -25,6 +24,7 @@ import ( "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/sync" "gvisor.dev/gvisor/pkg/syserror" ) diff --git a/pkg/sentry/fs/restore.go b/pkg/sentry/fs/restore.go index f10168125..64c6a6ae9 100644 --- a/pkg/sentry/fs/restore.go +++ b/pkg/sentry/fs/restore.go @@ -15,7 +15,7 @@ package fs import ( - "sync" + "gvisor.dev/gvisor/pkg/sync" ) // RestoreEnvironment is the restore environment for file systems. It consists diff --git a/pkg/sentry/fs/tmpfs/BUILD b/pkg/sentry/fs/tmpfs/BUILD index 59ce400c2..3400b940c 100644 --- a/pkg/sentry/fs/tmpfs/BUILD +++ b/pkg/sentry/fs/tmpfs/BUILD @@ -31,6 +31,7 @@ go_library( "//pkg/sentry/socket/unix/transport", "//pkg/sentry/usage", "//pkg/sentry/usermem", + "//pkg/sync", "//pkg/syserror", "//pkg/waiter", ], diff --git a/pkg/sentry/fs/tmpfs/inode_file.go b/pkg/sentry/fs/tmpfs/inode_file.go index f86dfaa36..f1c87fe41 100644 --- a/pkg/sentry/fs/tmpfs/inode_file.go +++ b/pkg/sentry/fs/tmpfs/inode_file.go @@ -17,7 +17,6 @@ package tmpfs import ( "fmt" "io" - "sync" "time" "gvisor.dev/gvisor/pkg/abi/linux" @@ -31,6 +30,7 @@ import ( "gvisor.dev/gvisor/pkg/sentry/safemem" "gvisor.dev/gvisor/pkg/sentry/usage" "gvisor.dev/gvisor/pkg/sentry/usermem" + "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" ) diff --git a/pkg/sentry/fs/tmpfs/tmpfs.go b/pkg/sentry/fs/tmpfs/tmpfs.go index 69089c8a8..0f718e236 100644 --- a/pkg/sentry/fs/tmpfs/tmpfs.go +++ b/pkg/sentry/fs/tmpfs/tmpfs.go @@ -148,19 +148,19 @@ func (d *Dir) CreateFifo(ctx context.Context, dir *fs.Inode, name string, perms return d.ramfsDir.CreateFifo(ctx, dir, name, perms) } -// Getxattr implements fs.InodeOperations.Getxattr. -func (d *Dir) Getxattr(i *fs.Inode, name string) (string, error) { - return d.ramfsDir.Getxattr(i, name) +// GetXattr implements fs.InodeOperations.GetXattr. +func (d *Dir) GetXattr(ctx context.Context, i *fs.Inode, name string, size uint64) (string, error) { + return d.ramfsDir.GetXattr(ctx, i, name, size) } -// Setxattr implements fs.InodeOperations.Setxattr. -func (d *Dir) Setxattr(i *fs.Inode, name, value string) error { - return d.ramfsDir.Setxattr(i, name, value) +// SetXattr implements fs.InodeOperations.SetXattr. +func (d *Dir) SetXattr(ctx context.Context, i *fs.Inode, name, value string, flags uint32) error { + return d.ramfsDir.SetXattr(ctx, i, name, value, flags) } -// Listxattr implements fs.InodeOperations.Listxattr. -func (d *Dir) Listxattr(i *fs.Inode) (map[string]struct{}, error) { - return d.ramfsDir.Listxattr(i) +// ListXattr implements fs.InodeOperations.ListXattr. +func (d *Dir) ListXattr(ctx context.Context, i *fs.Inode) (map[string]struct{}, error) { + return d.ramfsDir.ListXattr(ctx, i) } // Lookup implements fs.InodeOperations.Lookup. diff --git a/pkg/sentry/fs/tty/BUILD b/pkg/sentry/fs/tty/BUILD index 95ad98cb0..f6f60d0cf 100644 --- a/pkg/sentry/fs/tty/BUILD +++ b/pkg/sentry/fs/tty/BUILD @@ -30,6 +30,7 @@ go_library( "//pkg/sentry/socket/unix/transport", "//pkg/sentry/unimpl", "//pkg/sentry/usermem", + "//pkg/sync", "//pkg/syserror", "//pkg/waiter", ], diff --git a/pkg/sentry/fs/tty/dir.go b/pkg/sentry/fs/tty/dir.go index 2f639c823..88aa66b24 100644 --- a/pkg/sentry/fs/tty/dir.go +++ b/pkg/sentry/fs/tty/dir.go @@ -19,7 +19,6 @@ import ( "fmt" "math" "strconv" - "sync" "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/sentry/context" @@ -28,6 +27,7 @@ import ( "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/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) diff --git a/pkg/sentry/fs/tty/line_discipline.go b/pkg/sentry/fs/tty/line_discipline.go index 7cc0eb409..894964260 100644 --- a/pkg/sentry/fs/tty/line_discipline.go +++ b/pkg/sentry/fs/tty/line_discipline.go @@ -16,13 +16,13 @@ package tty import ( "bytes" - "sync" "unicode/utf8" "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/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) diff --git a/pkg/sentry/fs/tty/queue.go b/pkg/sentry/fs/tty/queue.go index 231e4e6eb..8b5d4699a 100644 --- a/pkg/sentry/fs/tty/queue.go +++ b/pkg/sentry/fs/tty/queue.go @@ -15,13 +15,12 @@ package tty import ( - "sync" - "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/sync" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" ) |