diff options
Diffstat (limited to 'pkg')
55 files changed, 342 insertions, 229 deletions
diff --git a/pkg/abi/linux/fs.go b/pkg/abi/linux/fs.go index 2b1ef0d4e..0d921ed6f 100644 --- a/pkg/abi/linux/fs.go +++ b/pkg/abi/linux/fs.go @@ -29,6 +29,7 @@ const ( SYSFS_MAGIC = 0x62656572 TMPFS_MAGIC = 0x01021994 V9FS_MAGIC = 0x01021997 + FUSE_SUPER_MAGIC = 0x65735546 ) // Filesystem path limits, from uapi/linux/limits.h. diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go index e6a35c60f..02d8c9d42 100644 --- a/pkg/abi/linux/linux_abi_autogen_unsafe.go +++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go @@ -154,7 +154,7 @@ func (s *Statx) UnmarshalBytes(src []byte) { // Packed implements marshal.Marshallable.Packed. //go:nosplit func (s *Statx) Packed() bool { - return s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() + return s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() } // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. @@ -169,7 +169,7 @@ func (s *Statx) MarshalUnsafe(dst []byte) { // UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe. func (s *Statx) UnmarshalUnsafe(src []byte) { - if s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() { + if s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() { safecopy.CopyOut(unsafe.Pointer(s), src) } else { // Type Statx doesn't have a packed layout in memory, fallback to UnmarshalBytes. @@ -210,7 +210,7 @@ func (s *Statx) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (s *Statx) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() { + if !s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() { // Type Statx doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. @@ -711,7 +711,7 @@ func (f *FUSEHeaderIn) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) // WriteTo implements io.WriterTo.WriteTo. func (f *FUSEHeaderIn) WriteTo(writer io.Writer) (int64, error) { - if !f.Unique.Packed() && f.Opcode.Packed() { + if !f.Opcode.Packed() && f.Unique.Packed() { // Type FUSEHeaderIn doesn't have a packed layout in memory, fall back to MarshalBytes. buf := make([]byte, f.SizeBytes()) f.MarshalBytes(buf) @@ -2022,7 +2022,7 @@ func (i *IPTEntry) UnmarshalBytes(src []byte) { // Packed implements marshal.Marshallable.Packed. //go:nosplit func (i *IPTEntry) Packed() bool { - return i.Counters.Packed() && i.IP.Packed() + return i.IP.Packed() && i.Counters.Packed() } // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. @@ -2037,7 +2037,7 @@ func (i *IPTEntry) MarshalUnsafe(dst []byte) { // UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe. func (i *IPTEntry) UnmarshalUnsafe(src []byte) { - if i.IP.Packed() && i.Counters.Packed() { + if i.Counters.Packed() && i.IP.Packed() { safecopy.CopyOut(unsafe.Pointer(i), src) } else { // Type IPTEntry doesn't have a packed layout in memory, fallback to UnmarshalBytes. @@ -2048,7 +2048,7 @@ func (i *IPTEntry) UnmarshalUnsafe(src []byte) { // CopyOutN implements marshal.Marshallable.CopyOutN. //go:nosplit func (i *IPTEntry) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) { - if !i.IP.Packed() && i.Counters.Packed() { + if !i.Counters.Packed() && i.IP.Packed() { // Type IPTEntry doesn't have a packed layout in memory, fall back to MarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. i.MarshalBytes(buf) // escapes: fallback. @@ -2104,7 +2104,7 @@ func (i *IPTEntry) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { // WriteTo implements io.WriterTo.WriteTo. func (i *IPTEntry) WriteTo(writer io.Writer) (int64, error) { - if !i.Counters.Packed() && i.IP.Packed() { + if !i.IP.Packed() && i.Counters.Packed() { // Type IPTEntry doesn't have a packed layout in memory, fall back to MarshalBytes. buf := make([]byte, i.SizeBytes()) i.MarshalBytes(buf) @@ -2215,7 +2215,7 @@ func (i *IPTIP) Packed() bool { // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. func (i *IPTIP) MarshalUnsafe(dst []byte) { - if i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() { + if i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { safecopy.CopyIn(dst, unsafe.Pointer(i)) } else { // Type IPTIP doesn't have a packed layout in memory, fallback to MarshalBytes. @@ -2236,7 +2236,7 @@ func (i *IPTIP) UnmarshalUnsafe(src []byte) { // CopyOutN implements marshal.Marshallable.CopyOutN. //go:nosplit func (i *IPTIP) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) { - if !i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() { + if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { // Type IPTIP doesn't have a packed layout in memory, fall back to MarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. i.MarshalBytes(buf) // escapes: fallback. @@ -2266,7 +2266,7 @@ func (i *IPTIP) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (i *IPTIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { + if !i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() { // Type IPTIP doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. @@ -3001,7 +3001,7 @@ func (i *IP6TEntry) UnmarshalBytes(src []byte) { // Packed implements marshal.Marshallable.Packed. //go:nosplit func (i *IP6TEntry) Packed() bool { - return i.Counters.Packed() && i.IPv6.Packed() + return i.IPv6.Packed() && i.Counters.Packed() } // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. @@ -3027,7 +3027,7 @@ func (i *IP6TEntry) UnmarshalUnsafe(src []byte) { // CopyOutN implements marshal.Marshallable.CopyOutN. //go:nosplit func (i *IP6TEntry) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) { - if !i.Counters.Packed() && i.IPv6.Packed() { + if !i.IPv6.Packed() && i.Counters.Packed() { // Type IP6TEntry doesn't have a packed layout in memory, fall back to MarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. i.MarshalBytes(buf) // escapes: fallback. @@ -3224,7 +3224,7 @@ func (i *IP6TIP) UnmarshalUnsafe(src []byte) { // CopyOutN implements marshal.Marshallable.CopyOutN. //go:nosplit func (i *IP6TIP) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) { - if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { + if !i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() { // Type IP6TIP doesn't have a packed layout in memory, fall back to MarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. i.MarshalBytes(buf) // escapes: fallback. @@ -3254,7 +3254,7 @@ func (i *IP6TIP) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (i *IP6TIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() { + if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { // Type IP6TIP doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(i.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. @@ -3280,7 +3280,7 @@ func (i *IP6TIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { // WriteTo implements io.WriterTo.WriteTo. func (i *IP6TIP) WriteTo(writer io.Writer) (int64, error) { - if !i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() { + if !i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() { // Type IP6TIP doesn't have a packed layout in memory, fall back to MarshalBytes. buf := make([]byte, i.SizeBytes()) i.MarshalBytes(buf) diff --git a/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go b/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go index 40afcf70b..35dee59d0 100644 --- a/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go +++ b/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go @@ -288,7 +288,7 @@ func (s *Stat) UnmarshalBytes(src []byte) { // Packed implements marshal.Marshallable.Packed. //go:nosplit func (s *Stat) Packed() bool { - return s.CTime.Packed() && s.ATime.Packed() && s.MTime.Packed() + return s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() } // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe. @@ -314,7 +314,7 @@ func (s *Stat) UnmarshalUnsafe(src []byte) { // CopyOutN implements marshal.Marshallable.CopyOutN. //go:nosplit func (s *Stat) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) { - if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() { + if !s.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed() { // Type Stat doesn't have a packed layout in memory, fall back to MarshalBytes. buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay. s.MarshalBytes(buf) // escapes: fallback. @@ -344,7 +344,7 @@ func (s *Stat) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (s *Stat) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !s.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed() { + if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() { // Type Stat doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. @@ -370,7 +370,7 @@ func (s *Stat) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { // WriteTo implements io.WriterTo.WriteTo. func (s *Stat) WriteTo(writer io.Writer) (int64, error) { - if !s.CTime.Packed() && s.ATime.Packed() && s.MTime.Packed() { + if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() { // Type Stat doesn't have a packed layout in memory, fall back to MarshalBytes. buf := make([]byte, s.SizeBytes()) s.MarshalBytes(buf) diff --git a/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go b/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go index ad1d20bc6..7a5f4e86c 100644 --- a/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go +++ b/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go @@ -351,7 +351,7 @@ func (s *Stat) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) { // CopyIn implements marshal.Marshallable.CopyIn. //go:nosplit func (s *Stat) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) { - if !s.CTime.Packed() && s.ATime.Packed() && s.MTime.Packed() { + if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() { // Type Stat doesn't have a packed layout in memory, fall back to UnmarshalBytes. buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay. length, err := task.CopyInBytes(addr, buf) // escapes: okay. diff --git a/pkg/sentry/fsimpl/devpts/devpts.go b/pkg/sentry/fsimpl/devpts/devpts.go index 0eaff9087..57580f4d4 100644 --- a/pkg/sentry/fsimpl/devpts/devpts.go +++ b/pkg/sentry/fsimpl/devpts/devpts.go @@ -111,12 +111,13 @@ func (fs *filesystem) Release(ctx context.Context) { // rootInode is the root directory inode for the devpts mounts. type rootInode struct { - rootInodeRefs + implStatFS kernfs.AlwaysValid kernfs.InodeAttrs kernfs.InodeDirectoryNoNewChildren kernfs.InodeNotSymlink kernfs.OrderedChildren + rootInodeRefs locks vfs.FileLocks @@ -240,3 +241,10 @@ func (i *rootInode) IterDirents(ctx context.Context, cb vfs.IterDirentsCallback, func (i *rootInode) DecRef(context.Context) { i.rootInodeRefs.DecRef(i.Destroy) } + +type implStatFS struct{} + +// StatFS implements kernfs.Inode.StatFS. +func (*implStatFS) StatFS(context.Context, *vfs.Filesystem) (linux.Statfs, error) { + return vfs.GenericStatFS(linux.DEVPTS_SUPER_MAGIC), nil +} diff --git a/pkg/sentry/fsimpl/devpts/master.go b/pkg/sentry/fsimpl/devpts/master.go index 3bb397f71..60feb1993 100644 --- a/pkg/sentry/fsimpl/devpts/master.go +++ b/pkg/sentry/fsimpl/devpts/master.go @@ -30,6 +30,7 @@ import ( // masterInode is the inode for the master end of the Terminal. type masterInode struct { + implStatFS kernfs.InodeAttrs kernfs.InodeNoopRefCount kernfs.InodeNotDirectory diff --git a/pkg/sentry/fsimpl/devpts/root_inode_refs.go b/pkg/sentry/fsimpl/devpts/root_inode_refs.go index 1b7090229..051801202 100644 --- a/pkg/sentry/fsimpl/devpts/root_inode_refs.go +++ b/pkg/sentry/fsimpl/devpts/root_inode_refs.go @@ -2,11 +2,11 @@ package devpts import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/devpts/slave.go b/pkg/sentry/fsimpl/devpts/slave.go index 32e4e1908..a9da7af64 100644 --- a/pkg/sentry/fsimpl/devpts/slave.go +++ b/pkg/sentry/fsimpl/devpts/slave.go @@ -29,6 +29,7 @@ import ( // slaveInode is the inode for the slave end of the Terminal. type slaveInode struct { + implStatFS kernfs.InodeAttrs kernfs.InodeNoopRefCount kernfs.InodeNotDirectory diff --git a/pkg/sentry/fsimpl/fuse/fusefs.go b/pkg/sentry/fsimpl/fuse/fusefs.go index 9717c0e15..810819ae4 100644 --- a/pkg/sentry/fsimpl/fuse/fusefs.go +++ b/pkg/sentry/fsimpl/fuse/fusefs.go @@ -200,9 +200,9 @@ func (fs *filesystem) Release(ctx context.Context) { type inode struct { inodeRefs kernfs.InodeAttrs + kernfs.InodeDirectoryNoNewChildren kernfs.InodeNoDynamicLookup kernfs.InodeNotSymlink - kernfs.InodeDirectoryNoNewChildren kernfs.OrderedChildren locks vfs.FileLocks @@ -331,3 +331,9 @@ func (i *inode) Stat(ctx context.Context, fs *vfs.Filesystem, opts vfs.StatOptio func (i *inode) DecRef(context.Context) { i.inodeRefs.DecRef(i.Destroy) } + +// StatFS implements kernfs.Inode.StatFS. +func (i *inode) StatFS(ctx context.Context, fs *vfs.Filesystem) (linux.Statfs, error) { + // TODO(gvisor.dev/issues/3413): Complete the implementation of statfs. + return vfs.GenericStatFS(linux.FUSE_SUPER_MAGIC), nil +} diff --git a/pkg/sentry/fsimpl/fuse/inode_refs.go b/pkg/sentry/fsimpl/fuse/inode_refs.go index 12e7d6e6c..6b9456e1d 100644 --- a/pkg/sentry/fsimpl/fuse/inode_refs.go +++ b/pkg/sentry/fsimpl/fuse/inode_refs.go @@ -2,11 +2,11 @@ package fuse import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/host/connected_endpoint_refs.go b/pkg/sentry/fsimpl/host/connected_endpoint_refs.go index 7fa5a516d..babb3f664 100644 --- a/pkg/sentry/fsimpl/host/connected_endpoint_refs.go +++ b/pkg/sentry/fsimpl/host/connected_endpoint_refs.go @@ -2,11 +2,11 @@ package host import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/host/host.go b/pkg/sentry/fsimpl/host/host.go index 2d3821f33..7561f821c 100644 --- a/pkg/sentry/fsimpl/host/host.go +++ b/pkg/sentry/fsimpl/host/host.go @@ -186,6 +186,7 @@ func (fs *filesystem) PrependPath(ctx context.Context, vfsroot, vd vfs.VirtualDe // inode implements kernfs.Inode. type inode struct { + kernfs.InodeNoStatFS kernfs.InodeNotDirectory kernfs.InodeNotSymlink diff --git a/pkg/sentry/fsimpl/host/inode_refs.go b/pkg/sentry/fsimpl/host/inode_refs.go index c294b8b80..17f90ce4a 100644 --- a/pkg/sentry/fsimpl/host/inode_refs.go +++ b/pkg/sentry/fsimpl/host/inode_refs.go @@ -2,11 +2,11 @@ package host import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/kernfs/dentry_refs.go b/pkg/sentry/fsimpl/kernfs/dentry_refs.go index dd5325635..79863b3bc 100644 --- a/pkg/sentry/fsimpl/kernfs/dentry_refs.go +++ b/pkg/sentry/fsimpl/kernfs/dentry_refs.go @@ -2,11 +2,11 @@ package kernfs import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go b/pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go index 12adf727a..1ee089620 100644 --- a/pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go +++ b/pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go @@ -35,6 +35,7 @@ import ( // +stateify savable type DynamicBytesFile struct { InodeAttrs + InodeNoStatFS InodeNoopRefCount InodeNotDirectory InodeNotSymlink diff --git a/pkg/sentry/fsimpl/kernfs/filesystem.go b/pkg/sentry/fsimpl/kernfs/filesystem.go index e5d6b5c35..0e3011689 100644 --- a/pkg/sentry/fsimpl/kernfs/filesystem.go +++ b/pkg/sentry/fsimpl/kernfs/filesystem.go @@ -721,14 +721,13 @@ func (fs *Filesystem) StatAt(ctx context.Context, rp *vfs.ResolvingPath, opts vf // StatFSAt implements vfs.FilesystemImpl.StatFSAt. func (fs *Filesystem) StatFSAt(ctx context.Context, rp *vfs.ResolvingPath) (linux.Statfs, error) { fs.mu.RLock() - _, _, err := fs.walkExistingLocked(ctx, rp) + _, inode, err := fs.walkExistingLocked(ctx, rp) fs.mu.RUnlock() fs.processDeferredDecRefs(ctx) if err != nil { return linux.Statfs{}, err } - // TODO(gvisor.dev/issue/1193): actually implement statfs. - return linux.Statfs{}, syserror.ENOSYS + return inode.StatFS(ctx, fs.VFSFilesystem()) } // SymlinkAt implements vfs.FilesystemImpl.SymlinkAt. diff --git a/pkg/sentry/fsimpl/kernfs/inode_impl_util.go b/pkg/sentry/fsimpl/kernfs/inode_impl_util.go index f442a5606..c0b863ba4 100644 --- a/pkg/sentry/fsimpl/kernfs/inode_impl_util.go +++ b/pkg/sentry/fsimpl/kernfs/inode_impl_util.go @@ -546,12 +546,13 @@ func (InodeSymlink) Open(ctx context.Context, rp *vfs.ResolvingPath, vfsd *vfs.D // // +stateify savable type StaticDirectory struct { - StaticDirectoryRefs - InodeNotSymlink - InodeDirectoryNoNewChildren InodeAttrs + InodeDirectoryNoNewChildren InodeNoDynamicLookup + InodeNoStatFS + InodeNotSymlink OrderedChildren + StaticDirectoryRefs locks vfs.FileLocks fdOpts GenericDirectoryFDOptions @@ -609,3 +610,12 @@ type AlwaysValid struct{} func (*AlwaysValid) Valid(context.Context) bool { return true } + +// InodeNoStatFS partially implements the Inode interface, where the client +// filesystem doesn't support statfs(2). +type InodeNoStatFS struct{} + +// StatFS implements Inode.StatFS. +func (*InodeNoStatFS) StatFS(context.Context, *vfs.Filesystem) (linux.Statfs, error) { + return linux.Statfs{}, syserror.ENOSYS +} diff --git a/pkg/sentry/fsimpl/kernfs/kernfs.go b/pkg/sentry/fsimpl/kernfs/kernfs.go index ca3685800..88fcd54aa 100644 --- a/pkg/sentry/fsimpl/kernfs/kernfs.go +++ b/pkg/sentry/fsimpl/kernfs/kernfs.go @@ -320,6 +320,11 @@ type Inode interface { // Precondition: rp.Done(). vfsd.Impl() must be the kernfs Dentry containing // the inode on which Open() is being called. Open(ctx context.Context, rp *vfs.ResolvingPath, vfsd *vfs.Dentry, opts vfs.OpenOptions) (*vfs.FileDescription, error) + + // StatFS returns filesystem statistics for the client filesystem. This + // corresponds to vfs.FilesystemImpl.StatFSAt. If the client filesystem + // doesn't support statfs(2), this should return ENOSYS. + StatFS(ctx context.Context, fs *vfs.Filesystem) (linux.Statfs, error) } type inodeRefs interface { diff --git a/pkg/sentry/fsimpl/kernfs/kernfs_state_autogen.go b/pkg/sentry/fsimpl/kernfs/kernfs_state_autogen.go index 12aaf797f..cf480327f 100644 --- a/pkg/sentry/fsimpl/kernfs/kernfs_state_autogen.go +++ b/pkg/sentry/fsimpl/kernfs/kernfs_state_autogen.go @@ -36,6 +36,7 @@ func (x *DynamicBytesFile) StateTypeName() string { func (x *DynamicBytesFile) StateFields() []string { return []string{ "InodeAttrs", + "InodeNoStatFS", "InodeNoopRefCount", "InodeNotDirectory", "InodeNotSymlink", @@ -49,22 +50,24 @@ func (x *DynamicBytesFile) beforeSave() {} func (x *DynamicBytesFile) StateSave(m state.Sink) { x.beforeSave() m.Save(0, &x.InodeAttrs) - m.Save(1, &x.InodeNoopRefCount) - m.Save(2, &x.InodeNotDirectory) - m.Save(3, &x.InodeNotSymlink) - m.Save(4, &x.locks) - m.Save(5, &x.data) + m.Save(1, &x.InodeNoStatFS) + m.Save(2, &x.InodeNoopRefCount) + m.Save(3, &x.InodeNotDirectory) + m.Save(4, &x.InodeNotSymlink) + m.Save(5, &x.locks) + m.Save(6, &x.data) } func (x *DynamicBytesFile) afterLoad() {} func (x *DynamicBytesFile) StateLoad(m state.Source) { m.Load(0, &x.InodeAttrs) - m.Load(1, &x.InodeNoopRefCount) - m.Load(2, &x.InodeNotDirectory) - m.Load(3, &x.InodeNotSymlink) - m.Load(4, &x.locks) - m.Load(5, &x.data) + m.Load(1, &x.InodeNoStatFS) + m.Load(2, &x.InodeNoopRefCount) + m.Load(3, &x.InodeNotDirectory) + m.Load(4, &x.InodeNotSymlink) + m.Load(5, &x.locks) + m.Load(6, &x.data) } func (x *DynamicBytesFD) StateTypeName() string { @@ -108,12 +111,13 @@ func (x *StaticDirectory) StateTypeName() string { func (x *StaticDirectory) StateFields() []string { return []string{ - "StaticDirectoryRefs", - "InodeNotSymlink", - "InodeDirectoryNoNewChildren", "InodeAttrs", + "InodeDirectoryNoNewChildren", "InodeNoDynamicLookup", + "InodeNoStatFS", + "InodeNotSymlink", "OrderedChildren", + "StaticDirectoryRefs", "locks", "fdOpts", } @@ -123,27 +127,29 @@ func (x *StaticDirectory) beforeSave() {} func (x *StaticDirectory) StateSave(m state.Sink) { x.beforeSave() - m.Save(0, &x.StaticDirectoryRefs) - m.Save(1, &x.InodeNotSymlink) - m.Save(2, &x.InodeDirectoryNoNewChildren) - m.Save(3, &x.InodeAttrs) - m.Save(4, &x.InodeNoDynamicLookup) + m.Save(0, &x.InodeAttrs) + m.Save(1, &x.InodeDirectoryNoNewChildren) + m.Save(2, &x.InodeNoDynamicLookup) + m.Save(3, &x.InodeNoStatFS) + m.Save(4, &x.InodeNotSymlink) m.Save(5, &x.OrderedChildren) - m.Save(6, &x.locks) - m.Save(7, &x.fdOpts) + m.Save(6, &x.StaticDirectoryRefs) + m.Save(7, &x.locks) + m.Save(8, &x.fdOpts) } func (x *StaticDirectory) afterLoad() {} func (x *StaticDirectory) StateLoad(m state.Source) { - m.Load(0, &x.StaticDirectoryRefs) - m.Load(1, &x.InodeNotSymlink) - m.Load(2, &x.InodeDirectoryNoNewChildren) - m.Load(3, &x.InodeAttrs) - m.Load(4, &x.InodeNoDynamicLookup) + m.Load(0, &x.InodeAttrs) + m.Load(1, &x.InodeDirectoryNoNewChildren) + m.Load(2, &x.InodeNoDynamicLookup) + m.Load(3, &x.InodeNoStatFS) + m.Load(4, &x.InodeNotSymlink) m.Load(5, &x.OrderedChildren) - m.Load(6, &x.locks) - m.Load(7, &x.fdOpts) + m.Load(6, &x.StaticDirectoryRefs) + m.Load(7, &x.locks) + m.Load(8, &x.fdOpts) } func (x *slotList) StateTypeName() string { diff --git a/pkg/sentry/fsimpl/kernfs/static_directory_refs.go b/pkg/sentry/fsimpl/kernfs/static_directory_refs.go index 80513f6aa..478b04bdd 100644 --- a/pkg/sentry/fsimpl/kernfs/static_directory_refs.go +++ b/pkg/sentry/fsimpl/kernfs/static_directory_refs.go @@ -2,11 +2,11 @@ package kernfs import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/kernfs/symlink.go b/pkg/sentry/fsimpl/kernfs/symlink.go index 2ab3f53fd..64731a3e4 100644 --- a/pkg/sentry/fsimpl/kernfs/symlink.go +++ b/pkg/sentry/fsimpl/kernfs/symlink.go @@ -28,6 +28,7 @@ type StaticSymlink struct { InodeAttrs InodeNoopRefCount InodeSymlink + InodeNoStatFS target string } diff --git a/pkg/sentry/fsimpl/pipefs/pipefs.go b/pkg/sentry/fsimpl/pipefs/pipefs.go index 2ca793db9..7053ad6db 100644 --- a/pkg/sentry/fsimpl/pipefs/pipefs.go +++ b/pkg/sentry/fsimpl/pipefs/pipefs.go @@ -143,14 +143,16 @@ func (i *inode) SetStat(ctx context.Context, vfsfs *vfs.Filesystem, creds *auth. return syserror.EPERM } -// TODO(gvisor.dev/issue/1193): kernfs does not provide a way to implement -// statfs, from which we should indicate PIPEFS_MAGIC. - // Open implements kernfs.Inode.Open. func (i *inode) Open(ctx context.Context, rp *vfs.ResolvingPath, vfsd *vfs.Dentry, opts vfs.OpenOptions) (*vfs.FileDescription, error) { return i.pipe.Open(ctx, rp.Mount(), vfsd, opts.Flags, &i.locks) } +// StatFS implements kernfs.Inode.StatFS. +func (i *inode) StatFS(ctx context.Context, fs *vfs.Filesystem) (linux.Statfs, error) { + return vfs.GenericStatFS(linux.PIPEFS_MAGIC), nil +} + // NewConnectedPipeFDs returns a pair of FileDescriptions representing the read // and write ends of a newly-created pipe, as for pipe(2) and pipe2(2). // diff --git a/pkg/sentry/fsimpl/proc/fd_dir_inode_refs.go b/pkg/sentry/fsimpl/proc/fd_dir_inode_refs.go index 8ed286c46..9431c1506 100644 --- a/pkg/sentry/fsimpl/proc/fd_dir_inode_refs.go +++ b/pkg/sentry/fsimpl/proc/fd_dir_inode_refs.go @@ -2,11 +2,11 @@ package proc import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/proc/fd_info_dir_inode_refs.go b/pkg/sentry/fsimpl/proc/fd_info_dir_inode_refs.go index 957c6a6dd..872b20eb0 100644 --- a/pkg/sentry/fsimpl/proc/fd_info_dir_inode_refs.go +++ b/pkg/sentry/fsimpl/proc/fd_info_dir_inode_refs.go @@ -2,11 +2,11 @@ package proc import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/proc/filesystem.go b/pkg/sentry/fsimpl/proc/filesystem.go index c350ec127..03b5941b9 100644 --- a/pkg/sentry/fsimpl/proc/filesystem.go +++ b/pkg/sentry/fsimpl/proc/filesystem.go @@ -121,3 +121,10 @@ func newStaticDir(creds *auth.Credentials, devMajor, devMinor uint32, ino uint64 type InternalData struct { Cgroups map[string]string } + +type implStatFS struct{} + +// StatFS implements kernfs.Inode.StatFS. +func (*implStatFS) StatFS(context.Context, *vfs.Filesystem) (linux.Statfs, error) { + return vfs.GenericStatFS(linux.PROC_SUPER_MAGIC), nil +} diff --git a/pkg/sentry/fsimpl/proc/proc_state_autogen.go b/pkg/sentry/fsimpl/proc/proc_state_autogen.go index 907ef38e0..1a13f066a 100644 --- a/pkg/sentry/fsimpl/proc/proc_state_autogen.go +++ b/pkg/sentry/fsimpl/proc/proc_state_autogen.go @@ -77,12 +77,13 @@ func (x *subtasksInode) StateTypeName() string { func (x *subtasksInode) StateFields() []string { return []string{ - "subtasksInodeRefs", - "InodeNotSymlink", - "InodeDirectoryNoNewChildren", + "implStatFS", + "AlwaysValid", "InodeAttrs", + "InodeDirectoryNoNewChildren", + "InodeNotSymlink", "OrderedChildren", - "AlwaysValid", + "subtasksInodeRefs", "locks", "fs", "task", @@ -95,33 +96,35 @@ func (x *subtasksInode) beforeSave() {} func (x *subtasksInode) StateSave(m state.Sink) { x.beforeSave() - m.Save(0, &x.subtasksInodeRefs) - m.Save(1, &x.InodeNotSymlink) - m.Save(2, &x.InodeDirectoryNoNewChildren) - m.Save(3, &x.InodeAttrs) - m.Save(4, &x.OrderedChildren) - m.Save(5, &x.AlwaysValid) - m.Save(6, &x.locks) - m.Save(7, &x.fs) - m.Save(8, &x.task) - m.Save(9, &x.pidns) - m.Save(10, &x.cgroupControllers) + m.Save(0, &x.implStatFS) + m.Save(1, &x.AlwaysValid) + m.Save(2, &x.InodeAttrs) + m.Save(3, &x.InodeDirectoryNoNewChildren) + m.Save(4, &x.InodeNotSymlink) + m.Save(5, &x.OrderedChildren) + m.Save(6, &x.subtasksInodeRefs) + m.Save(7, &x.locks) + m.Save(8, &x.fs) + m.Save(9, &x.task) + m.Save(10, &x.pidns) + m.Save(11, &x.cgroupControllers) } func (x *subtasksInode) afterLoad() {} func (x *subtasksInode) StateLoad(m state.Source) { - m.Load(0, &x.subtasksInodeRefs) - m.Load(1, &x.InodeNotSymlink) - m.Load(2, &x.InodeDirectoryNoNewChildren) - m.Load(3, &x.InodeAttrs) - m.Load(4, &x.OrderedChildren) - m.Load(5, &x.AlwaysValid) - m.Load(6, &x.locks) - m.Load(7, &x.fs) - m.Load(8, &x.task) - m.Load(9, &x.pidns) - m.Load(10, &x.cgroupControllers) + m.Load(0, &x.implStatFS) + m.Load(1, &x.AlwaysValid) + m.Load(2, &x.InodeAttrs) + m.Load(3, &x.InodeDirectoryNoNewChildren) + m.Load(4, &x.InodeNotSymlink) + m.Load(5, &x.OrderedChildren) + m.Load(6, &x.subtasksInodeRefs) + m.Load(7, &x.locks) + m.Load(8, &x.fs) + m.Load(9, &x.task) + m.Load(10, &x.pidns) + m.Load(11, &x.cgroupControllers) } func (x *subtasksInodeRefs) StateTypeName() string { @@ -153,12 +156,13 @@ func (x *taskInode) StateTypeName() string { func (x *taskInode) StateFields() []string { return []string{ - "taskInodeRefs", - "InodeNotSymlink", + "implStatFS", + "InodeAttrs", "InodeDirectoryNoNewChildren", "InodeNoDynamicLookup", - "InodeAttrs", + "InodeNotSymlink", "OrderedChildren", + "taskInodeRefs", "locks", "task", } @@ -168,27 +172,29 @@ func (x *taskInode) beforeSave() {} func (x *taskInode) StateSave(m state.Sink) { x.beforeSave() - m.Save(0, &x.taskInodeRefs) - m.Save(1, &x.InodeNotSymlink) + m.Save(0, &x.implStatFS) + m.Save(1, &x.InodeAttrs) m.Save(2, &x.InodeDirectoryNoNewChildren) m.Save(3, &x.InodeNoDynamicLookup) - m.Save(4, &x.InodeAttrs) + m.Save(4, &x.InodeNotSymlink) m.Save(5, &x.OrderedChildren) - m.Save(6, &x.locks) - m.Save(7, &x.task) + m.Save(6, &x.taskInodeRefs) + m.Save(7, &x.locks) + m.Save(8, &x.task) } func (x *taskInode) afterLoad() {} func (x *taskInode) StateLoad(m state.Source) { - m.Load(0, &x.taskInodeRefs) - m.Load(1, &x.InodeNotSymlink) + m.Load(0, &x.implStatFS) + m.Load(1, &x.InodeAttrs) m.Load(2, &x.InodeDirectoryNoNewChildren) m.Load(3, &x.InodeNoDynamicLookup) - m.Load(4, &x.InodeAttrs) + m.Load(4, &x.InodeNotSymlink) m.Load(5, &x.OrderedChildren) - m.Load(6, &x.locks) - m.Load(7, &x.task) + m.Load(6, &x.taskInodeRefs) + m.Load(7, &x.locks) + m.Load(8, &x.task) } func (x *fdDirInode) StateTypeName() string { @@ -197,13 +203,14 @@ func (x *fdDirInode) StateTypeName() string { func (x *fdDirInode) StateFields() []string { return []string{ + "fdDir", "fdDirInodeRefs", - "InodeNotSymlink", - "InodeDirectoryNoNewChildren", + "implStatFS", + "AlwaysValid", "InodeAttrs", + "InodeDirectoryNoNewChildren", + "InodeNotSymlink", "OrderedChildren", - "AlwaysValid", - "fdDir", } } @@ -211,25 +218,27 @@ func (x *fdDirInode) beforeSave() {} func (x *fdDirInode) StateSave(m state.Sink) { x.beforeSave() - m.Save(0, &x.fdDirInodeRefs) - m.Save(1, &x.InodeNotSymlink) - m.Save(2, &x.InodeDirectoryNoNewChildren) - m.Save(3, &x.InodeAttrs) - m.Save(4, &x.OrderedChildren) - m.Save(5, &x.AlwaysValid) - m.Save(6, &x.fdDir) + m.Save(0, &x.fdDir) + m.Save(1, &x.fdDirInodeRefs) + m.Save(2, &x.implStatFS) + m.Save(3, &x.AlwaysValid) + m.Save(4, &x.InodeAttrs) + m.Save(5, &x.InodeDirectoryNoNewChildren) + m.Save(6, &x.InodeNotSymlink) + m.Save(7, &x.OrderedChildren) } func (x *fdDirInode) afterLoad() {} func (x *fdDirInode) StateLoad(m state.Source) { - m.Load(0, &x.fdDirInodeRefs) - m.Load(1, &x.InodeNotSymlink) - m.Load(2, &x.InodeDirectoryNoNewChildren) - m.Load(3, &x.InodeAttrs) - m.Load(4, &x.OrderedChildren) - m.Load(5, &x.AlwaysValid) - m.Load(6, &x.fdDir) + m.Load(0, &x.fdDir) + m.Load(1, &x.fdDirInodeRefs) + m.Load(2, &x.implStatFS) + m.Load(3, &x.AlwaysValid) + m.Load(4, &x.InodeAttrs) + m.Load(5, &x.InodeDirectoryNoNewChildren) + m.Load(6, &x.InodeNotSymlink) + m.Load(7, &x.OrderedChildren) } func (x *fdSymlink) StateTypeName() string { @@ -238,6 +247,7 @@ func (x *fdSymlink) StateTypeName() string { func (x *fdSymlink) StateFields() []string { return []string{ + "implStatFS", "InodeAttrs", "InodeNoopRefCount", "InodeSymlink", @@ -250,21 +260,23 @@ func (x *fdSymlink) beforeSave() {} func (x *fdSymlink) StateSave(m state.Sink) { x.beforeSave() - m.Save(0, &x.InodeAttrs) - m.Save(1, &x.InodeNoopRefCount) - m.Save(2, &x.InodeSymlink) - m.Save(3, &x.task) - m.Save(4, &x.fd) + m.Save(0, &x.implStatFS) + m.Save(1, &x.InodeAttrs) + m.Save(2, &x.InodeNoopRefCount) + m.Save(3, &x.InodeSymlink) + m.Save(4, &x.task) + m.Save(5, &x.fd) } func (x *fdSymlink) afterLoad() {} func (x *fdSymlink) StateLoad(m state.Source) { - m.Load(0, &x.InodeAttrs) - m.Load(1, &x.InodeNoopRefCount) - m.Load(2, &x.InodeSymlink) - m.Load(3, &x.task) - m.Load(4, &x.fd) + m.Load(0, &x.implStatFS) + m.Load(1, &x.InodeAttrs) + m.Load(2, &x.InodeNoopRefCount) + m.Load(3, &x.InodeSymlink) + m.Load(4, &x.task) + m.Load(5, &x.fd) } func (x *fdInfoDirInode) StateTypeName() string { @@ -273,13 +285,14 @@ func (x *fdInfoDirInode) StateTypeName() string { func (x *fdInfoDirInode) StateFields() []string { return []string{ + "fdDir", "fdInfoDirInodeRefs", - "InodeNotSymlink", - "InodeDirectoryNoNewChildren", + "implStatFS", + "AlwaysValid", "InodeAttrs", + "InodeDirectoryNoNewChildren", + "InodeNotSymlink", "OrderedChildren", - "AlwaysValid", - "fdDir", } } @@ -287,25 +300,27 @@ func (x *fdInfoDirInode) beforeSave() {} func (x *fdInfoDirInode) StateSave(m state.Sink) { x.beforeSave() - m.Save(0, &x.fdInfoDirInodeRefs) - m.Save(1, &x.InodeNotSymlink) - m.Save(2, &x.InodeDirectoryNoNewChildren) - m.Save(3, &x.InodeAttrs) - m.Save(4, &x.OrderedChildren) - m.Save(5, &x.AlwaysValid) - m.Save(6, &x.fdDir) + m.Save(0, &x.fdDir) + m.Save(1, &x.fdInfoDirInodeRefs) + m.Save(2, &x.implStatFS) + m.Save(3, &x.AlwaysValid) + m.Save(4, &x.InodeAttrs) + m.Save(5, &x.InodeDirectoryNoNewChildren) + m.Save(6, &x.InodeNotSymlink) + m.Save(7, &x.OrderedChildren) } func (x *fdInfoDirInode) afterLoad() {} func (x *fdInfoDirInode) StateLoad(m state.Source) { - m.Load(0, &x.fdInfoDirInodeRefs) - m.Load(1, &x.InodeNotSymlink) - m.Load(2, &x.InodeDirectoryNoNewChildren) - m.Load(3, &x.InodeAttrs) - m.Load(4, &x.OrderedChildren) - m.Load(5, &x.AlwaysValid) - m.Load(6, &x.fdDir) + m.Load(0, &x.fdDir) + m.Load(1, &x.fdInfoDirInodeRefs) + m.Load(2, &x.implStatFS) + m.Load(3, &x.AlwaysValid) + m.Load(4, &x.InodeAttrs) + m.Load(5, &x.InodeDirectoryNoNewChildren) + m.Load(6, &x.InodeNotSymlink) + m.Load(7, &x.OrderedChildren) } func (x *fdInfoData) StateTypeName() string { @@ -670,6 +685,7 @@ func (x *exeSymlink) StateTypeName() string { func (x *exeSymlink) StateFields() []string { return []string{ + "implStatFS", "InodeAttrs", "InodeNoopRefCount", "InodeSymlink", @@ -681,19 +697,21 @@ func (x *exeSymlink) beforeSave() {} func (x *exeSymlink) StateSave(m state.Sink) { x.beforeSave() - m.Save(0, &x.InodeAttrs) - m.Save(1, &x.InodeNoopRefCount) - m.Save(2, &x.InodeSymlink) - m.Save(3, &x.task) + m.Save(0, &x.implStatFS) + m.Save(1, &x.InodeAttrs) + m.Save(2, &x.InodeNoopRefCount) + m.Save(3, &x.InodeSymlink) + m.Save(4, &x.task) } func (x *exeSymlink) afterLoad() {} func (x *exeSymlink) StateLoad(m state.Source) { - m.Load(0, &x.InodeAttrs) - m.Load(1, &x.InodeNoopRefCount) - m.Load(2, &x.InodeSymlink) - m.Load(3, &x.task) + m.Load(0, &x.implStatFS) + m.Load(1, &x.InodeAttrs) + m.Load(2, &x.InodeNoopRefCount) + m.Load(3, &x.InodeSymlink) + m.Load(4, &x.task) } func (x *mountInfoData) StateTypeName() string { @@ -1011,12 +1029,13 @@ func (x *tasksInode) StateTypeName() string { func (x *tasksInode) StateFields() []string { return []string{ - "tasksInodeRefs", - "InodeNotSymlink", - "InodeDirectoryNoNewChildren", + "implStatFS", + "AlwaysValid", "InodeAttrs", + "InodeDirectoryNoNewChildren", + "InodeNotSymlink", "OrderedChildren", - "AlwaysValid", + "tasksInodeRefs", "locks", "fs", "pidns", @@ -1030,35 +1049,37 @@ func (x *tasksInode) beforeSave() {} func (x *tasksInode) StateSave(m state.Sink) { x.beforeSave() - m.Save(0, &x.tasksInodeRefs) - m.Save(1, &x.InodeNotSymlink) - m.Save(2, &x.InodeDirectoryNoNewChildren) - m.Save(3, &x.InodeAttrs) - m.Save(4, &x.OrderedChildren) - m.Save(5, &x.AlwaysValid) - m.Save(6, &x.locks) - m.Save(7, &x.fs) - m.Save(8, &x.pidns) - m.Save(9, &x.selfSymlink) - m.Save(10, &x.threadSelfSymlink) - m.Save(11, &x.cgroupControllers) + m.Save(0, &x.implStatFS) + m.Save(1, &x.AlwaysValid) + m.Save(2, &x.InodeAttrs) + m.Save(3, &x.InodeDirectoryNoNewChildren) + m.Save(4, &x.InodeNotSymlink) + m.Save(5, &x.OrderedChildren) + m.Save(6, &x.tasksInodeRefs) + m.Save(7, &x.locks) + m.Save(8, &x.fs) + m.Save(9, &x.pidns) + m.Save(10, &x.selfSymlink) + m.Save(11, &x.threadSelfSymlink) + m.Save(12, &x.cgroupControllers) } func (x *tasksInode) afterLoad() {} func (x *tasksInode) StateLoad(m state.Source) { - m.Load(0, &x.tasksInodeRefs) - m.Load(1, &x.InodeNotSymlink) - m.Load(2, &x.InodeDirectoryNoNewChildren) - m.Load(3, &x.InodeAttrs) - m.Load(4, &x.OrderedChildren) - m.Load(5, &x.AlwaysValid) - m.Load(6, &x.locks) - m.Load(7, &x.fs) - m.Load(8, &x.pidns) - m.Load(9, &x.selfSymlink) - m.Load(10, &x.threadSelfSymlink) - m.Load(11, &x.cgroupControllers) + m.Load(0, &x.implStatFS) + m.Load(1, &x.AlwaysValid) + m.Load(2, &x.InodeAttrs) + m.Load(3, &x.InodeDirectoryNoNewChildren) + m.Load(4, &x.InodeNotSymlink) + m.Load(5, &x.OrderedChildren) + m.Load(6, &x.tasksInodeRefs) + m.Load(7, &x.locks) + m.Load(8, &x.fs) + m.Load(9, &x.pidns) + m.Load(10, &x.selfSymlink) + m.Load(11, &x.threadSelfSymlink) + m.Load(12, &x.cgroupControllers) } func (x *statData) StateTypeName() string { diff --git a/pkg/sentry/fsimpl/proc/subtasks.go b/pkg/sentry/fsimpl/proc/subtasks.go index 01c0efb3a..d57d94dbc 100644 --- a/pkg/sentry/fsimpl/proc/subtasks.go +++ b/pkg/sentry/fsimpl/proc/subtasks.go @@ -31,12 +31,13 @@ import ( // // +stateify savable type subtasksInode struct { - subtasksInodeRefs - kernfs.InodeNotSymlink - kernfs.InodeDirectoryNoNewChildren + implStatFS + kernfs.AlwaysValid kernfs.InodeAttrs + kernfs.InodeDirectoryNoNewChildren + kernfs.InodeNotSymlink kernfs.OrderedChildren - kernfs.AlwaysValid + subtasksInodeRefs locks vfs.FileLocks diff --git a/pkg/sentry/fsimpl/proc/subtasks_inode_refs.go b/pkg/sentry/fsimpl/proc/subtasks_inode_refs.go index a80ec9e0a..c6d9b3522 100644 --- a/pkg/sentry/fsimpl/proc/subtasks_inode_refs.go +++ b/pkg/sentry/fsimpl/proc/subtasks_inode_refs.go @@ -2,11 +2,11 @@ package proc import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/proc/task.go b/pkg/sentry/fsimpl/proc/task.go index 66b557abd..dbdb5d929 100644 --- a/pkg/sentry/fsimpl/proc/task.go +++ b/pkg/sentry/fsimpl/proc/task.go @@ -32,12 +32,13 @@ import ( // // +stateify savable type taskInode struct { - taskInodeRefs - kernfs.InodeNotSymlink + implStatFS + kernfs.InodeAttrs kernfs.InodeDirectoryNoNewChildren kernfs.InodeNoDynamicLookup - kernfs.InodeAttrs + kernfs.InodeNotSymlink kernfs.OrderedChildren + taskInodeRefs locks vfs.FileLocks diff --git a/pkg/sentry/fsimpl/proc/task_fds.go b/pkg/sentry/fsimpl/proc/task_fds.go index 0527b2de8..3f0d78461 100644 --- a/pkg/sentry/fsimpl/proc/task_fds.go +++ b/pkg/sentry/fsimpl/proc/task_fds.go @@ -100,13 +100,14 @@ func (i *fdDir) IterDirents(ctx context.Context, cb vfs.IterDirentsCallback, off // // +stateify savable type fdDirInode struct { + fdDir fdDirInodeRefs - kernfs.InodeNotSymlink - kernfs.InodeDirectoryNoNewChildren + implStatFS + kernfs.AlwaysValid kernfs.InodeAttrs + kernfs.InodeDirectoryNoNewChildren + kernfs.InodeNotSymlink kernfs.OrderedChildren - kernfs.AlwaysValid - fdDir } var _ kernfs.Inode = (*fdDirInode)(nil) @@ -185,6 +186,7 @@ func (i *fdDirInode) DecRef(context.Context) { // // +stateify savable type fdSymlink struct { + implStatFS kernfs.InodeAttrs kernfs.InodeNoopRefCount kernfs.InodeSymlink @@ -233,13 +235,14 @@ func (s *fdSymlink) Getlink(ctx context.Context, mnt *vfs.Mount) (vfs.VirtualDen // // +stateify savable type fdInfoDirInode struct { + fdDir fdInfoDirInodeRefs - kernfs.InodeNotSymlink - kernfs.InodeDirectoryNoNewChildren + implStatFS + kernfs.AlwaysValid kernfs.InodeAttrs + kernfs.InodeDirectoryNoNewChildren + kernfs.InodeNotSymlink kernfs.OrderedChildren - kernfs.AlwaysValid - fdDir } var _ kernfs.Inode = (*fdInfoDirInode)(nil) diff --git a/pkg/sentry/fsimpl/proc/task_files.go b/pkg/sentry/fsimpl/proc/task_files.go index 830b78949..356036b9b 100644 --- a/pkg/sentry/fsimpl/proc/task_files.go +++ b/pkg/sentry/fsimpl/proc/task_files.go @@ -648,6 +648,7 @@ func (o *oomScoreAdj) Write(ctx context.Context, src usermem.IOSequence, offset // // +stateify savable type exeSymlink struct { + implStatFS kernfs.InodeAttrs kernfs.InodeNoopRefCount kernfs.InodeSymlink @@ -832,6 +833,7 @@ func (s *namespaceSymlink) Getlink(ctx context.Context, mnt *vfs.Mount) (vfs.Vir // namespaceInode is a synthetic inode created to represent a namespace in // /proc/[pid]/ns/*. type namespaceInode struct { + implStatFS kernfs.InodeAttrs kernfs.InodeNoopRefCount kernfs.InodeNotDirectory diff --git a/pkg/sentry/fsimpl/proc/task_inode_refs.go b/pkg/sentry/fsimpl/proc/task_inode_refs.go index c4835cbca..714488450 100644 --- a/pkg/sentry/fsimpl/proc/task_inode_refs.go +++ b/pkg/sentry/fsimpl/proc/task_inode_refs.go @@ -2,11 +2,11 @@ package proc import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/proc/tasks.go b/pkg/sentry/fsimpl/proc/tasks.go index 863c4467e..3ea00ab87 100644 --- a/pkg/sentry/fsimpl/proc/tasks.go +++ b/pkg/sentry/fsimpl/proc/tasks.go @@ -37,12 +37,13 @@ const ( // // +stateify savable type tasksInode struct { - tasksInodeRefs - kernfs.InodeNotSymlink - kernfs.InodeDirectoryNoNewChildren + implStatFS + kernfs.AlwaysValid kernfs.InodeAttrs + kernfs.InodeDirectoryNoNewChildren + kernfs.InodeNotSymlink kernfs.OrderedChildren - kernfs.AlwaysValid + tasksInodeRefs locks vfs.FileLocks diff --git a/pkg/sentry/fsimpl/proc/tasks_files.go b/pkg/sentry/fsimpl/proc/tasks_files.go index 7d8983aa5..8c41729e4 100644 --- a/pkg/sentry/fsimpl/proc/tasks_files.go +++ b/pkg/sentry/fsimpl/proc/tasks_files.go @@ -32,6 +32,7 @@ import ( ) type selfSymlink struct { + implStatFS kernfs.InodeAttrs kernfs.InodeNoopRefCount kernfs.InodeSymlink @@ -74,6 +75,7 @@ func (*selfSymlink) SetStat(context.Context, *vfs.Filesystem, *auth.Credentials, } type threadSelfSymlink struct { + implStatFS kernfs.InodeAttrs kernfs.InodeNoopRefCount kernfs.InodeSymlink diff --git a/pkg/sentry/fsimpl/proc/tasks_inode_refs.go b/pkg/sentry/fsimpl/proc/tasks_inode_refs.go index 5dfb34238..22d9cc488 100644 --- a/pkg/sentry/fsimpl/proc/tasks_inode_refs.go +++ b/pkg/sentry/fsimpl/proc/tasks_inode_refs.go @@ -2,11 +2,11 @@ package proc import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/sockfs/sockfs.go b/pkg/sentry/fsimpl/sockfs/sockfs.go index c61818ff6..94a998568 100644 --- a/pkg/sentry/fsimpl/sockfs/sockfs.go +++ b/pkg/sentry/fsimpl/sockfs/sockfs.go @@ -81,10 +81,10 @@ func (fs *filesystem) PrependPath(ctx context.Context, vfsroot, vd vfs.VirtualDe // inode implements kernfs.Inode. type inode struct { - kernfs.InodeNotDirectory - kernfs.InodeNotSymlink kernfs.InodeAttrs kernfs.InodeNoopRefCount + kernfs.InodeNotDirectory + kernfs.InodeNotSymlink } // Open implements kernfs.Inode.Open. @@ -92,6 +92,11 @@ func (i *inode) Open(ctx context.Context, rp *vfs.ResolvingPath, vfsd *vfs.Dentr return nil, syserror.ENXIO } +// StatFS implements kernfs.Inode.StatFS. +func (i *inode) StatFS(ctx context.Context, fs *vfs.Filesystem) (linux.Statfs, error) { + return vfs.GenericStatFS(linux.SOCKFS_MAGIC), nil +} + // NewDentry constructs and returns a sockfs dentry. // // Preconditions: mnt.Filesystem() must have been returned by NewFilesystem(). diff --git a/pkg/sentry/fsimpl/sys/dir_refs.go b/pkg/sentry/fsimpl/sys/dir_refs.go index c05154e2b..89609b198 100644 --- a/pkg/sentry/fsimpl/sys/dir_refs.go +++ b/pkg/sentry/fsimpl/sys/dir_refs.go @@ -2,11 +2,11 @@ package sys import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/fsimpl/sys/kcov.go b/pkg/sentry/fsimpl/sys/kcov.go index 92710d877..73f3d3309 100644 --- a/pkg/sentry/fsimpl/sys/kcov.go +++ b/pkg/sentry/fsimpl/sys/kcov.go @@ -39,8 +39,9 @@ func (fs *filesystem) newKcovFile(ctx context.Context, creds *auth.Credentials) type kcovInode struct { kernfs.InodeAttrs kernfs.InodeNoopRefCount - kernfs.InodeNotSymlink kernfs.InodeNotDirectory + kernfs.InodeNotSymlink + implStatFS } func (i *kcovInode) Open(ctx context.Context, rp *vfs.ResolvingPath, vfsd *vfs.Dentry, opts vfs.OpenOptions) (*vfs.FileDescription, error) { diff --git a/pkg/sentry/fsimpl/sys/sys.go b/pkg/sentry/fsimpl/sys/sys.go index ea30a4ec2..39952d2d0 100644 --- a/pkg/sentry/fsimpl/sys/sys.go +++ b/pkg/sentry/fsimpl/sys/sys.go @@ -163,9 +163,16 @@ func (d *dir) DecRef(context.Context) { d.dirRefs.DecRef(d.Destroy) } +// StatFS implements kernfs.Inode.StatFS. +func (d *dir) StatFS(ctx context.Context, fs *vfs.Filesystem) (linux.Statfs, error) { + return vfs.GenericStatFS(linux.SYSFS_MAGIC), nil +} + // cpuFile implements kernfs.Inode. type cpuFile struct { + implStatFS kernfs.DynamicBytesFile + maxCores uint } @@ -182,3 +189,10 @@ func (fs *filesystem) newCPUFile(creds *auth.Credentials, maxCores uint, mode li d.Init(c) return d } + +type implStatFS struct{} + +// StatFS implements kernfs.Inode.StatFS. +func (*implStatFS) StatFS(context.Context, *vfs.Filesystem) (linux.Statfs, error) { + return vfs.GenericStatFS(linux.SYSFS_MAGIC), nil +} diff --git a/pkg/sentry/fsimpl/tmpfs/inode_refs.go b/pkg/sentry/fsimpl/tmpfs/inode_refs.go index 38cc30981..dbf0b2766 100644 --- a/pkg/sentry/fsimpl/tmpfs/inode_refs.go +++ b/pkg/sentry/fsimpl/tmpfs/inode_refs.go @@ -2,11 +2,11 @@ package tmpfs import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/kernel/fd_table_refs.go b/pkg/sentry/kernel/fd_table_refs.go index 8973cac8a..ecba138ac 100644 --- a/pkg/sentry/kernel/fd_table_refs.go +++ b/pkg/sentry/kernel/fd_table_refs.go @@ -2,11 +2,11 @@ package kernel import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/kernel/fs_context_refs.go b/pkg/sentry/kernel/fs_context_refs.go index c0e01dbb3..fb2fde971 100644 --- a/pkg/sentry/kernel/fs_context_refs.go +++ b/pkg/sentry/kernel/fs_context_refs.go @@ -2,11 +2,11 @@ package kernel import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/kernel/process_group_refs.go b/pkg/sentry/kernel/process_group_refs.go index 5ff83ab96..4ed6e6458 100644 --- a/pkg/sentry/kernel/process_group_refs.go +++ b/pkg/sentry/kernel/process_group_refs.go @@ -2,11 +2,11 @@ package kernel import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/kernel/session_refs.go b/pkg/sentry/kernel/session_refs.go index 9c51eda6c..f2e1bb797 100644 --- a/pkg/sentry/kernel/session_refs.go +++ b/pkg/sentry/kernel/session_refs.go @@ -2,11 +2,11 @@ package kernel import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/kernel/shm/shm_refs.go b/pkg/sentry/kernel/shm/shm_refs.go index 0da23fa5f..51e07d0b3 100644 --- a/pkg/sentry/kernel/shm/shm_refs.go +++ b/pkg/sentry/kernel/shm/shm_refs.go @@ -2,11 +2,11 @@ package shm import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/mm/aio_mappable_refs.go b/pkg/sentry/mm/aio_mappable_refs.go index c80c56d94..b99909f07 100644 --- a/pkg/sentry/mm/aio_mappable_refs.go +++ b/pkg/sentry/mm/aio_mappable_refs.go @@ -2,11 +2,11 @@ package mm import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/mm/special_mappable_refs.go b/pkg/sentry/mm/special_mappable_refs.go index 5eb7e69e0..035bbe690 100644 --- a/pkg/sentry/mm/special_mappable_refs.go +++ b/pkg/sentry/mm/special_mappable_refs.go @@ -2,11 +2,11 @@ package mm import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/platform/ring0/defs_impl_arm64.go b/pkg/sentry/platform/ring0/defs_impl_arm64.go index 8ebfbfdb6..424b66f76 100644 --- a/pkg/sentry/platform/ring0/defs_impl_arm64.go +++ b/pkg/sentry/platform/ring0/defs_impl_arm64.go @@ -1,10 +1,10 @@ package ring0 import ( + "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables" "fmt" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/usermem" "io" "reflect" diff --git a/pkg/sentry/socket/unix/socket_refs.go b/pkg/sentry/socket/unix/socket_refs.go index 680ea06cd..dababb85f 100644 --- a/pkg/sentry/socket/unix/socket_refs.go +++ b/pkg/sentry/socket/unix/socket_refs.go @@ -2,11 +2,11 @@ package unix import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/socket/unix/transport/queue_refs.go b/pkg/sentry/socket/unix/transport/queue_refs.go index 17951eb2f..0d4e34988 100644 --- a/pkg/sentry/socket/unix/transport/queue_refs.go +++ b/pkg/sentry/socket/unix/transport/queue_refs.go @@ -2,11 +2,11 @@ package transport import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/vfs/file_description_refs.go b/pkg/sentry/vfs/file_description_refs.go index 5e612d7f0..bdd7e6554 100644 --- a/pkg/sentry/vfs/file_description_refs.go +++ b/pkg/sentry/vfs/file_description_refs.go @@ -2,11 +2,11 @@ package vfs import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/vfs/filesystem_impl_util.go b/pkg/sentry/vfs/filesystem_impl_util.go index 465e610e0..2620cf975 100644 --- a/pkg/sentry/vfs/filesystem_impl_util.go +++ b/pkg/sentry/vfs/filesystem_impl_util.go @@ -16,6 +16,9 @@ package vfs import ( "strings" + + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/usermem" ) // GenericParseMountOptions parses a comma-separated list of options of the @@ -41,3 +44,13 @@ func GenericParseMountOptions(str string) map[string]string { } return m } + +// GenericStatFS returns a statfs struct filled with the common fields for a +// general filesystem. This is analogous to Linux's fs/libfs.cs:simple_statfs(). +func GenericStatFS(fsMagic uint64) linux.Statfs { + return linux.Statfs{ + Type: fsMagic, + BlockSize: usermem.PageSize, + NameLength: linux.NAME_MAX, + } +} diff --git a/pkg/sentry/vfs/filesystem_refs.go b/pkg/sentry/vfs/filesystem_refs.go index aaa753c43..38a9a986f 100644 --- a/pkg/sentry/vfs/filesystem_refs.go +++ b/pkg/sentry/vfs/filesystem_refs.go @@ -2,11 +2,11 @@ package vfs import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/sentry/vfs/mount_namespace_refs.go b/pkg/sentry/vfs/mount_namespace_refs.go index 56b8d9903..63285fb8e 100644 --- a/pkg/sentry/vfs/mount_namespace_refs.go +++ b/pkg/sentry/vfs/mount_namespace_refs.go @@ -2,11 +2,11 @@ package vfs import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so diff --git a/pkg/tcpip/link/tun/tun_endpoint_refs.go b/pkg/tcpip/link/tun/tun_endpoint_refs.go index 7f80b1fa3..e0595429c 100644 --- a/pkg/tcpip/link/tun/tun_endpoint_refs.go +++ b/pkg/tcpip/link/tun/tun_endpoint_refs.go @@ -2,11 +2,11 @@ package tun import ( "fmt" - refs_vfs1 "gvisor.dev/gvisor/pkg/refs" "runtime" "sync/atomic" "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" ) // ownerType is used to customize logging. Note that we use a pointer to T so |