diff options
Diffstat (limited to 'pkg/sentry')
-rw-r--r-- | pkg/sentry/fsimpl/devpts/master.go | 11 | ||||
-rw-r--r-- | pkg/sentry/fsimpl/devpts/replica.go | 11 | ||||
-rw-r--r-- | pkg/sentry/fsimpl/gofer/gofer.go | 8 | ||||
-rw-r--r-- | pkg/sentry/fsimpl/host/host.go | 11 | ||||
-rw-r--r-- | pkg/sentry/fsimpl/host/tty.go | 11 | ||||
-rw-r--r-- | pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go | 11 | ||||
-rw-r--r-- | pkg/sentry/fsimpl/kernfs/fd_impl_util.go | 11 | ||||
-rw-r--r-- | pkg/sentry/fsimpl/overlay/overlay.go | 11 | ||||
-rw-r--r-- | pkg/sentry/fsimpl/proc/task_files.go | 21 | ||||
-rw-r--r-- | pkg/sentry/fsimpl/tmpfs/tmpfs.go | 11 | ||||
-rw-r--r-- | pkg/sentry/kernel/fd_table.go | 5 | ||||
-rw-r--r-- | pkg/sentry/kernel/pipe/vfs.go | 11 | ||||
-rw-r--r-- | pkg/sentry/socket/hostinet/socket_vfs2.go | 11 | ||||
-rw-r--r-- | pkg/sentry/socket/netlink/socket_vfs2.go | 11 | ||||
-rw-r--r-- | pkg/sentry/socket/netstack/netstack_vfs2.go | 11 | ||||
-rw-r--r-- | pkg/sentry/socket/unix/unix_vfs2.go | 11 | ||||
-rw-r--r-- | pkg/sentry/syscalls/linux/vfs2/fd.go | 11 | ||||
-rw-r--r-- | pkg/sentry/vfs/file_description.go | 39 | ||||
-rw-r--r-- | pkg/sentry/vfs/file_description_impl_util.go | 14 | ||||
-rw-r--r-- | pkg/sentry/vfs/lock.go | 16 |
20 files changed, 63 insertions, 194 deletions
diff --git a/pkg/sentry/fsimpl/devpts/master.go b/pkg/sentry/fsimpl/devpts/master.go index e91fa26a4..b44117f40 100644 --- a/pkg/sentry/fsimpl/devpts/master.go +++ b/pkg/sentry/fsimpl/devpts/master.go @@ -19,7 +19,6 @@ import ( "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/marshal/primitive" "gvisor.dev/gvisor/pkg/sentry/arch" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" @@ -194,16 +193,6 @@ func (mfd *masterFileDescription) Stat(ctx context.Context, opts vfs.StatOptions return mfd.inode.Stat(ctx, fs, opts) } -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (mfd *masterFileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return mfd.Locks().LockPOSIX(ctx, &mfd.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (mfd *masterFileDescription) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return mfd.Locks().UnlockPOSIX(ctx, &mfd.vfsfd, uid, start, length, whence) -} - // maybeEmitUnimplementedEvent emits unimplemented event if cmd is valid. func maybeEmitUnimplementedEvent(ctx context.Context, cmd uint32) { switch cmd { diff --git a/pkg/sentry/fsimpl/devpts/replica.go b/pkg/sentry/fsimpl/devpts/replica.go index 70c68cf0a..a0c5b5af5 100644 --- a/pkg/sentry/fsimpl/devpts/replica.go +++ b/pkg/sentry/fsimpl/devpts/replica.go @@ -19,7 +19,6 @@ import ( "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/marshal/primitive" "gvisor.dev/gvisor/pkg/sentry/arch" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" @@ -189,13 +188,3 @@ func (rfd *replicaFileDescription) Stat(ctx context.Context, opts vfs.StatOption fs := rfd.vfsfd.VirtualDentry().Mount().Filesystem() return rfd.inode.Stat(ctx, fs, opts) } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (rfd *replicaFileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return rfd.Locks().LockPOSIX(ctx, &rfd.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (rfd *replicaFileDescription) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return rfd.Locks().UnlockPOSIX(ctx, &rfd.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/fsimpl/gofer/gofer.go b/pkg/sentry/fsimpl/gofer/gofer.go index 3cdb1e659..a43364b55 100644 --- a/pkg/sentry/fsimpl/gofer/gofer.go +++ b/pkg/sentry/fsimpl/gofer/gofer.go @@ -1952,14 +1952,14 @@ func (fd *fileDescription) LockBSD(ctx context.Context, uid fslock.UniqueID, t f } // LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (fd *fileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { +func (fd *fileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, r fslock.LockRange, block fslock.Blocker) error { fd.lockLogging.Do(func() { log.Infof("Range lock using gofer file handled internally.") }) - return fd.Locks().LockPOSIX(ctx, &fd.vfsfd, uid, t, start, length, whence, block) + return fd.Locks().LockPOSIX(ctx, uid, t, r, block) } // UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (fd *fileDescription) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return fd.Locks().UnlockPOSIX(ctx, &fd.vfsfd, uid, start, length, whence) +func (fd *fileDescription) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, r fslock.LockRange) error { + return fd.Locks().UnlockPOSIX(ctx, uid, r) } diff --git a/pkg/sentry/fsimpl/host/host.go b/pkg/sentry/fsimpl/host/host.go index 36a3f6810..05f11fbd5 100644 --- a/pkg/sentry/fsimpl/host/host.go +++ b/pkg/sentry/fsimpl/host/host.go @@ -28,7 +28,6 @@ import ( "gvisor.dev/gvisor/pkg/fdnotifier" "gvisor.dev/gvisor/pkg/fspath" "gvisor.dev/gvisor/pkg/log" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs" "gvisor.dev/gvisor/pkg/sentry/hostfd" "gvisor.dev/gvisor/pkg/sentry/kernel" @@ -810,13 +809,3 @@ func (f *fileDescription) EventUnregister(e *waiter.Entry) { func (f *fileDescription) Readiness(mask waiter.EventMask) waiter.EventMask { return fdnotifier.NonBlockingPoll(int32(f.inode.hostFD), mask) } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (f *fileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return f.Locks().LockPOSIX(ctx, &f.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (f *fileDescription) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return f.Locks().UnlockPOSIX(ctx, &f.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/fsimpl/host/tty.go b/pkg/sentry/fsimpl/host/tty.go index f5c596fec..0f9e20a84 100644 --- a/pkg/sentry/fsimpl/host/tty.go +++ b/pkg/sentry/fsimpl/host/tty.go @@ -19,7 +19,6 @@ import ( "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/marshal/primitive" "gvisor.dev/gvisor/pkg/sentry/arch" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/unimpl" "gvisor.dev/gvisor/pkg/sentry/vfs" @@ -370,13 +369,3 @@ func (t *TTYFileDescription) checkChange(ctx context.Context, sig linux.Signal) _ = pg.SendSignal(kernel.SignalInfoPriv(sig)) return syserror.ERESTARTSYS } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (t *TTYFileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, typ fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return t.Locks().LockPOSIX(ctx, &t.vfsfd, uid, typ, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (t *TTYFileDescription) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return t.Locks().UnlockPOSIX(ctx, &t.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go b/pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go index 485504995..65054b0ea 100644 --- a/pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go +++ b/pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go @@ -19,7 +19,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" "gvisor.dev/gvisor/pkg/sentry/vfs" "gvisor.dev/gvisor/pkg/syserror" @@ -136,13 +135,3 @@ func (fd *DynamicBytesFD) SetStat(context.Context, vfs.SetStatOptions) error { // DynamicBytesFiles are immutable. return syserror.EPERM } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (fd *DynamicBytesFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return fd.Locks().LockPOSIX(ctx, &fd.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (fd *DynamicBytesFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return fd.Locks().UnlockPOSIX(ctx, &fd.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/fsimpl/kernfs/fd_impl_util.go b/pkg/sentry/fsimpl/kernfs/fd_impl_util.go index f8dae22f8..e55111af0 100644 --- a/pkg/sentry/fsimpl/kernfs/fd_impl_util.go +++ b/pkg/sentry/fsimpl/kernfs/fd_impl_util.go @@ -19,7 +19,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" - fslock "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/vfs" @@ -275,13 +274,3 @@ func (fd *GenericDirectoryFD) SetStat(ctx context.Context, opts vfs.SetStatOptio func (fd *GenericDirectoryFD) Allocate(ctx context.Context, mode, offset, length uint64) error { return fd.DirectoryFileDescriptionDefaultImpl.Allocate(ctx, mode, offset, length) } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (fd *GenericDirectoryFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return fd.Locks().LockPOSIX(ctx, &fd.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (fd *GenericDirectoryFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return fd.Locks().UnlockPOSIX(ctx, &fd.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/fsimpl/overlay/overlay.go b/pkg/sentry/fsimpl/overlay/overlay.go index 3492409b2..082fa6504 100644 --- a/pkg/sentry/fsimpl/overlay/overlay.go +++ b/pkg/sentry/fsimpl/overlay/overlay.go @@ -42,7 +42,6 @@ import ( "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/fspath" "gvisor.dev/gvisor/pkg/refsvfs2" - fslock "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/vfs" @@ -820,13 +819,3 @@ func (fd *fileDescription) RemoveXattr(ctx context.Context, name string) error { d.InotifyWithParent(ctx, linux.IN_ATTRIB, 0, vfs.InodeEvent) return nil } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (fd *fileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return fd.Locks().LockPOSIX(ctx, &fd.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (fd *fileDescription) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return fd.Locks().UnlockPOSIX(ctx, &fd.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/fsimpl/proc/task_files.go b/pkg/sentry/fsimpl/proc/task_files.go index 75be6129f..fdae163d1 100644 --- a/pkg/sentry/fsimpl/proc/task_files.go +++ b/pkg/sentry/fsimpl/proc/task_files.go @@ -22,7 +22,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/safemem" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/fsbridge" "gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs" "gvisor.dev/gvisor/pkg/sentry/kernel" @@ -518,16 +517,6 @@ func (fd *memFD) SetStat(context.Context, vfs.SetStatOptions) error { // Release implements vfs.FileDescriptionImpl.Release. func (fd *memFD) Release(context.Context) {} -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (fd *memFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return fd.Locks().LockPOSIX(ctx, &fd.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (fd *memFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return fd.Locks().UnlockPOSIX(ctx, &fd.vfsfd, uid, start, length, whence) -} - // mapsData implements vfs.DynamicBytesSource for /proc/[pid]/maps. // // +stateify savable @@ -1110,13 +1099,3 @@ func (fd *namespaceFD) SetStat(ctx context.Context, opts vfs.SetStatOptions) err func (fd *namespaceFD) Release(ctx context.Context) { fd.inode.DecRef(ctx) } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (fd *namespaceFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return fd.Locks().LockPOSIX(ctx, &fd.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (fd *namespaceFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return fd.Locks().UnlockPOSIX(ctx, &fd.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/fsimpl/tmpfs/tmpfs.go b/pkg/sentry/fsimpl/tmpfs/tmpfs.go index 0c9c639d3..b32c54e20 100644 --- a/pkg/sentry/fsimpl/tmpfs/tmpfs.go +++ b/pkg/sentry/fsimpl/tmpfs/tmpfs.go @@ -36,7 +36,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" "gvisor.dev/gvisor/pkg/sentry/kernel/time" "gvisor.dev/gvisor/pkg/sentry/pgalloc" @@ -797,16 +796,6 @@ func (fd *fileDescription) RemoveXattr(ctx context.Context, name string) error { return nil } -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (fd *fileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return fd.Locks().LockPOSIX(ctx, &fd.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (fd *fileDescription) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return fd.Locks().UnlockPOSIX(ctx, &fd.vfsfd, uid, start, length, whence) -} - // Sync implements vfs.FileDescriptionImpl.Sync. It does nothing because all // filesystem state is in-memory. func (*fileDescription) Sync(context.Context) error { diff --git a/pkg/sentry/kernel/fd_table.go b/pkg/sentry/kernel/fd_table.go index 7aba31587..97aa679ed 100644 --- a/pkg/sentry/kernel/fd_table.go +++ b/pkg/sentry/kernel/fd_table.go @@ -153,9 +153,8 @@ func (f *FDTable) drop(ctx context.Context, file *fs.File) { // dropVFS2 drops the table reference. func (f *FDTable) dropVFS2(ctx context.Context, file *vfs.FileDescription) { - // Release any POSIX lock possibly held by the FDTable. Range {0, 0} means the - // entire file. - err := file.UnlockPOSIX(ctx, f, 0, 0, linux.SEEK_SET) + // Release any POSIX lock possibly held by the FDTable. + err := file.UnlockPOSIX(ctx, f, lock.LockRange{0, lock.LockEOF}) if err != nil && err != syserror.ENOLCK { panic(fmt.Sprintf("UnlockPOSIX failed: %v", err)) } diff --git a/pkg/sentry/kernel/pipe/vfs.go b/pkg/sentry/kernel/pipe/vfs.go index d5a91730d..3b6336e94 100644 --- a/pkg/sentry/kernel/pipe/vfs.go +++ b/pkg/sentry/kernel/pipe/vfs.go @@ -19,7 +19,6 @@ import ( "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/safemem" "gvisor.dev/gvisor/pkg/sentry/arch" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/vfs" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" @@ -441,13 +440,3 @@ func spliceOrTee(ctx context.Context, dst, src *VFSPipeFD, count int64, removeFr } return n, err } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (fd *VFSPipeFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return fd.Locks().LockPOSIX(ctx, &fd.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (fd *VFSPipeFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return fd.Locks().UnlockPOSIX(ctx, &fd.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/socket/hostinet/socket_vfs2.go b/pkg/sentry/socket/hostinet/socket_vfs2.go index 9a2cac40b..f82c7c224 100644 --- a/pkg/sentry/socket/hostinet/socket_vfs2.go +++ b/pkg/sentry/socket/hostinet/socket_vfs2.go @@ -21,7 +21,6 @@ import ( "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/fdnotifier" "gvisor.dev/gvisor/pkg/sentry/arch" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/fsimpl/sockfs" "gvisor.dev/gvisor/pkg/sentry/hostfd" "gvisor.dev/gvisor/pkg/sentry/kernel" @@ -144,16 +143,6 @@ func (s *socketVFS2) Write(ctx context.Context, src usermem.IOSequence, opts vfs return int64(n), err } -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (s *socketVFS2) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return s.Locks().LockPOSIX(ctx, &s.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (s *socketVFS2) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return s.Locks().UnlockPOSIX(ctx, &s.vfsfd, uid, start, length, whence) -} - type socketProviderVFS2 struct { family int } diff --git a/pkg/sentry/socket/netlink/socket_vfs2.go b/pkg/sentry/socket/netlink/socket_vfs2.go index 461d524e5..842036764 100644 --- a/pkg/sentry/socket/netlink/socket_vfs2.go +++ b/pkg/sentry/socket/netlink/socket_vfs2.go @@ -18,7 +18,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/sentry/arch" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/socket" "gvisor.dev/gvisor/pkg/sentry/socket/unix" @@ -149,13 +148,3 @@ func (s *SocketVFS2) Write(ctx context.Context, src usermem.IOSequence, opts vfs n, err := s.sendMsg(ctx, src, nil, 0, socket.ControlMessages{}) return int64(n), err.ToError() } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (s *SocketVFS2) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return s.Locks().LockPOSIX(ctx, &s.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (s *SocketVFS2) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return s.Locks().UnlockPOSIX(ctx, &s.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/socket/netstack/netstack_vfs2.go b/pkg/sentry/socket/netstack/netstack_vfs2.go index 6f70b02fc..9600a64e1 100644 --- a/pkg/sentry/socket/netstack/netstack_vfs2.go +++ b/pkg/sentry/socket/netstack/netstack_vfs2.go @@ -20,7 +20,6 @@ import ( "gvisor.dev/gvisor/pkg/marshal" "gvisor.dev/gvisor/pkg/marshal/primitive" "gvisor.dev/gvisor/pkg/sentry/arch" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/fsimpl/sockfs" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/socket" @@ -262,13 +261,3 @@ func (s *SocketVFS2) SetSockOpt(t *kernel.Task, level int, name int, optVal []by return SetSockOpt(t, s, s.Endpoint, level, name, optVal) } - -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (s *SocketVFS2) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return s.Locks().LockPOSIX(ctx, &s.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (s *SocketVFS2) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return s.Locks().UnlockPOSIX(ctx, &s.vfsfd, uid, start, length, whence) -} diff --git a/pkg/sentry/socket/unix/unix_vfs2.go b/pkg/sentry/socket/unix/unix_vfs2.go index 27f705bb2..a7d4d7f1f 100644 --- a/pkg/sentry/socket/unix/unix_vfs2.go +++ b/pkg/sentry/socket/unix/unix_vfs2.go @@ -20,7 +20,6 @@ import ( "gvisor.dev/gvisor/pkg/fspath" "gvisor.dev/gvisor/pkg/marshal" "gvisor.dev/gvisor/pkg/sentry/arch" - fslock "gvisor.dev/gvisor/pkg/sentry/fs/lock" "gvisor.dev/gvisor/pkg/sentry/fsimpl/sockfs" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/socket" @@ -331,16 +330,6 @@ func (s *SocketVFS2) SetSockOpt(t *kernel.Task, level int, name int, optVal []by return netstack.SetSockOpt(t, s, s.ep, level, name, optVal) } -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (s *SocketVFS2) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - return s.Locks().LockPOSIX(ctx, &s.vfsfd, uid, t, start, length, whence, block) -} - -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (s *SocketVFS2) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { - return s.Locks().UnlockPOSIX(ctx, &s.vfsfd, uid, start, length, whence) -} - // providerVFS2 is a unix domain socket provider for VFS2. type providerVFS2 struct{} diff --git a/pkg/sentry/syscalls/linux/vfs2/fd.go b/pkg/sentry/syscalls/linux/vfs2/fd.go index 7dd9ef857..9281952cb 100644 --- a/pkg/sentry/syscalls/linux/vfs2/fd.go +++ b/pkg/sentry/syscalls/linux/vfs2/fd.go @@ -305,21 +305,26 @@ func posixLock(t *kernel.Task, args arch.SyscallArguments, file *vfs.FileDescrip blocker = t } + r, err := file.ComputeLockRange(t, uint64(flock.Start), uint64(flock.Len), flock.Whence) + if err != nil { + return err + } + switch flock.Type { case linux.F_RDLCK: if !file.IsReadable() { return syserror.EBADF } - return file.LockPOSIX(t, t.FDTable(), lock.ReadLock, uint64(flock.Start), uint64(flock.Len), flock.Whence, blocker) + return file.LockPOSIX(t, t.FDTable(), lock.ReadLock, r, blocker) case linux.F_WRLCK: if !file.IsWritable() { return syserror.EBADF } - return file.LockPOSIX(t, t.FDTable(), lock.WriteLock, uint64(flock.Start), uint64(flock.Len), flock.Whence, blocker) + return file.LockPOSIX(t, t.FDTable(), lock.WriteLock, r, blocker) case linux.F_UNLCK: - return file.UnlockPOSIX(t, t.FDTable(), uint64(flock.Start), uint64(flock.Len), flock.Whence) + return file.UnlockPOSIX(t, t.FDTable(), r) default: return syserror.EINVAL diff --git a/pkg/sentry/vfs/file_description.go b/pkg/sentry/vfs/file_description.go index 5321ac80a..dbf8425b4 100644 --- a/pkg/sentry/vfs/file_description.go +++ b/pkg/sentry/vfs/file_description.go @@ -454,10 +454,10 @@ type FileDescriptionImpl interface { UnlockBSD(ctx context.Context, uid lock.UniqueID) error // LockPOSIX tries to acquire a POSIX-style advisory file lock. - LockPOSIX(ctx context.Context, uid lock.UniqueID, t lock.LockType, start, length uint64, whence int16, block lock.Blocker) error + LockPOSIX(ctx context.Context, uid lock.UniqueID, t lock.LockType, r lock.LockRange, block lock.Blocker) error // UnlockPOSIX releases a POSIX-style advisory file lock. - UnlockPOSIX(ctx context.Context, uid lock.UniqueID, start, length uint64, whence int16) error + UnlockPOSIX(ctx context.Context, uid lock.UniqueID, ComputeLockRange lock.LockRange) error } // Dirent holds the information contained in struct linux_dirent64. @@ -802,13 +802,40 @@ func (fd *FileDescription) UnlockBSD(ctx context.Context) error { } // LockPOSIX locks a POSIX-style file range lock. -func (fd *FileDescription) LockPOSIX(ctx context.Context, uid lock.UniqueID, t lock.LockType, start, end uint64, whence int16, block lock.Blocker) error { - return fd.impl.LockPOSIX(ctx, uid, t, start, end, whence, block) +func (fd *FileDescription) LockPOSIX(ctx context.Context, uid lock.UniqueID, t lock.LockType, r lock.LockRange, block lock.Blocker) error { + return fd.impl.LockPOSIX(ctx, uid, t, r, block) } // UnlockPOSIX unlocks a POSIX-style file range lock. -func (fd *FileDescription) UnlockPOSIX(ctx context.Context, uid lock.UniqueID, start, end uint64, whence int16) error { - return fd.impl.UnlockPOSIX(ctx, uid, start, end, whence) +func (fd *FileDescription) UnlockPOSIX(ctx context.Context, uid lock.UniqueID, r lock.LockRange) error { + return fd.impl.UnlockPOSIX(ctx, uid, r) +} + +// ComputeLockRange computes the range of a file lock based on the given values. +func (fd *FileDescription) ComputeLockRange(ctx context.Context, start uint64, length uint64, whence int16) (lock.LockRange, error) { + var off int64 + switch whence { + case linux.SEEK_SET: + off = 0 + case linux.SEEK_CUR: + // Note that Linux does not hold any mutexes while retrieving the file + // offset, see fs/locks.c:flock_to_posix_lock and fs/locks.c:fcntl_setlk. + curOff, err := fd.Seek(ctx, 0, linux.SEEK_CUR) + if err != nil { + return lock.LockRange{}, err + } + off = curOff + case linux.SEEK_END: + stat, err := fd.Stat(ctx, StatOptions{Mask: linux.STATX_SIZE}) + if err != nil { + return lock.LockRange{}, err + } + off = int64(stat.Size) + default: + return lock.LockRange{}, syserror.EINVAL + } + + return lock.ComputeRange(int64(start), int64(length), off) } // A FileAsync sends signals to its owner when w is ready for IO. This is only diff --git a/pkg/sentry/vfs/file_description_impl_util.go b/pkg/sentry/vfs/file_description_impl_util.go index 48ca9de44..9d13e2ccb 100644 --- a/pkg/sentry/vfs/file_description_impl_util.go +++ b/pkg/sentry/vfs/file_description_impl_util.go @@ -429,6 +429,16 @@ func (fd *LockFD) UnlockBSD(ctx context.Context, uid fslock.UniqueID) error { return nil } +// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. +func (fd *LockFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, r fslock.LockRange, block fslock.Blocker) error { + return fd.locks.LockPOSIX(ctx, uid, t, r, block) +} + +// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. +func (fd *LockFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, r fslock.LockRange) error { + return fd.locks.UnlockPOSIX(ctx, uid, r) +} + // NoLockFD implements Lock*/Unlock* portion of FileDescriptionImpl interface // returning ENOLCK. // @@ -446,11 +456,11 @@ func (NoLockFD) UnlockBSD(ctx context.Context, uid fslock.UniqueID) error { } // LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. -func (NoLockFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { +func (NoLockFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, r fslock.LockRange, block fslock.Blocker) error { return syserror.ENOLCK } // UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. -func (NoLockFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, start, length uint64, whence int16) error { +func (NoLockFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, r fslock.LockRange) error { return syserror.ENOLCK } diff --git a/pkg/sentry/vfs/lock.go b/pkg/sentry/vfs/lock.go index 1ff202f2a..bcff35792 100644 --- a/pkg/sentry/vfs/lock.go +++ b/pkg/sentry/vfs/lock.go @@ -61,12 +61,8 @@ func (fl *FileLocks) UnlockBSD(uid fslock.UniqueID) { } // LockPOSIX tries to acquire a POSIX-style lock on a file region. -func (fl *FileLocks) LockPOSIX(ctx context.Context, fd *FileDescription, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { - rng, err := computeRange(ctx, fd, start, length, whence) - if err != nil { - return err - } - if fl.posix.LockRegion(uid, t, rng, block) { +func (fl *FileLocks) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, r fslock.LockRange, block fslock.Blocker) error { + if fl.posix.LockRegion(uid, t, r, block) { return nil } @@ -82,12 +78,8 @@ func (fl *FileLocks) LockPOSIX(ctx context.Context, fd *FileDescription, uid fsl // // This operation is always successful, even if there did not exist a lock on // the requested region held by uid in the first place. -func (fl *FileLocks) UnlockPOSIX(ctx context.Context, fd *FileDescription, uid fslock.UniqueID, start, length uint64, whence int16) error { - rng, err := computeRange(ctx, fd, start, length, whence) - if err != nil { - return err - } - fl.posix.UnlockRegion(uid, rng) +func (fl *FileLocks) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, r fslock.LockRange) error { + fl.posix.UnlockRegion(uid, r) return nil } |