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-rw-r--r--pkg/abi/linux/fuse.go55
-rw-r--r--pkg/abi/linux/linux_abi_autogen_unsafe.go406
-rw-r--r--pkg/sentry/fsimpl/fuse/fusefs.go96
-rw-r--r--pkg/sentry/platform/ring0/defs_impl_arm64.go4
4 files changed, 549 insertions, 12 deletions
diff --git a/pkg/abi/linux/fuse.go b/pkg/abi/linux/fuse.go
index 5c6ffe4a3..7e30483ee 100644
--- a/pkg/abi/linux/fuse.go
+++ b/pkg/abi/linux/fuse.go
@@ -246,3 +246,58 @@ type FUSEInitOut struct {
_ [8]uint32
}
+
+// FUSEGetAttrIn is the request sent by the kernel to the daemon,
+// to get the attribute of a inode.
+//
+// +marshal
+type FUSEGetAttrIn struct {
+ // GetAttrFlags specifies whether getattr request is sent with a nodeid or
+ // with a file handle.
+ GetAttrFlags uint32
+
+ _ uint32
+
+ // Fh is the file handler when GetAttrFlags has FUSE_GETATTR_FH bit. If
+ // used, the operation is analogous to fstat(2).
+ Fh uint64
+}
+
+// FUSEAttr is the struct used in the reponse FUSEGetAttrOut.
+//
+// +marshal
+type FUSEAttr struct {
+ Ino uint64
+ Size uint64
+ Blocks uint64
+ Atime uint64
+ Mtime uint64
+ Ctime uint64
+ AtimeNsec uint32
+ MtimeNsec uint32
+ CtimeNsec uint32
+ Mode uint32
+ Nlink uint32
+ UID uint32
+ GID uint32
+ Rdev uint32
+ BlkSize uint32
+ _ uint32
+}
+
+// FUSEGetAttrOut is the reply sent by the daemon to the kernel
+// for FUSEGetAttrIn.
+//
+// +marshal
+type FUSEGetAttrOut struct {
+ // AttrValid and AttrValidNsec describe the attribute cache duration
+ AttrValid uint64
+
+ // AttrValidNsec is the nanosecond part of the attribute cache duration
+ AttrValidNsec uint32
+
+ _ uint32
+
+ // Attr contains the metadata returned from the FUSE server
+ Attr FUSEAttr
+}
diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go
index 0ff71c56b..8fdb4f1b1 100644
--- a/pkg/abi/linux/linux_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go
@@ -15,6 +15,9 @@ import (
// Marshallable types used by this file.
var _ marshal.Marshallable = (*ControlMessageCredentials)(nil)
+var _ marshal.Marshallable = (*FUSEAttr)(nil)
+var _ marshal.Marshallable = (*FUSEGetAttrIn)(nil)
+var _ marshal.Marshallable = (*FUSEGetAttrOut)(nil)
var _ marshal.Marshallable = (*FUSEHeaderIn)(nil)
var _ marshal.Marshallable = (*FUSEHeaderOut)(nil)
var _ marshal.Marshallable = (*FUSEInitIn)(nil)
@@ -145,12 +148,12 @@ func (s *Statx) UnmarshalBytes(src []byte) {
// Packed implements marshal.Marshallable.Packed.
//go:nosplit
func (s *Statx) Packed() bool {
- return s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed()
+ return s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed()
}
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (s *Statx) MarshalUnsafe(dst []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.CopyIn(dst, unsafe.Pointer(s))
} else {
// Type Statx doesn't have a packed layout in memory, fallback to MarshalBytes.
@@ -160,7 +163,7 @@ 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.
@@ -171,7 +174,7 @@ func (s *Statx) UnmarshalUnsafe(src []byte) {
// CopyOutN implements marshal.Marshallable.CopyOutN.
//go:nosplit
func (s *Statx) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
- if !s.Atime.Packed() && s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() {
+ if !s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() {
// Type Statx doesn't have a packed layout in memory, fall back to MarshalBytes.
buf := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
s.MarshalBytes(buf) // escapes: fallback.
@@ -201,7 +204,7 @@ 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.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.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.
@@ -227,7 +230,7 @@ func (s *Statx) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
// WriteTo implements io.WriterTo.WriteTo.
func (s *Statx) WriteTo(w io.Writer) (int64, 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 MarshalBytes.
buf := make([]byte, s.SizeBytes())
s.MarshalBytes(buf)
@@ -625,7 +628,7 @@ func (f *FUSEHeaderIn) Packed() bool {
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (f *FUSEHeaderIn) MarshalUnsafe(dst []byte) {
- if f.Unique.Packed() && f.Opcode.Packed() {
+ if f.Opcode.Packed() && f.Unique.Packed() {
safecopy.CopyIn(dst, unsafe.Pointer(f))
} else {
// Type FUSEHeaderIn doesn't have a packed layout in memory, fallback to MarshalBytes.
@@ -1202,6 +1205,389 @@ func (f *FUSEInitOut) WriteTo(w io.Writer) (int64, error) {
}
// SizeBytes implements marshal.Marshallable.SizeBytes.
+func (f *FUSEGetAttrIn) SizeBytes() int {
+ return 16
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (f *FUSEGetAttrIn) MarshalBytes(dst []byte) {
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.GetAttrFlags))
+ dst = dst[4:]
+ // Padding: dst[:sizeof(uint32)] ~= uint32(0)
+ dst = dst[4:]
+ usermem.ByteOrder.PutUint64(dst[:8], uint64(f.Fh))
+ dst = dst[8:]
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (f *FUSEGetAttrIn) UnmarshalBytes(src []byte) {
+ f.GetAttrFlags = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ // Padding: var _ uint32 ~= src[:sizeof(uint32)]
+ src = src[4:]
+ f.Fh = uint64(usermem.ByteOrder.Uint64(src[:8]))
+ src = src[8:]
+}
+
+// Packed implements marshal.Marshallable.Packed.
+//go:nosplit
+func (f *FUSEGetAttrIn) Packed() bool {
+ return true
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (f *FUSEGetAttrIn) MarshalUnsafe(dst []byte) {
+ safecopy.CopyIn(dst, unsafe.Pointer(f))
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (f *FUSEGetAttrIn) UnmarshalUnsafe(src []byte) {
+ safecopy.CopyOut(unsafe.Pointer(f), src)
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (f *FUSEGetAttrIn) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(f)))
+ hdr.Len = f.SizeBytes()
+ hdr.Cap = f.SizeBytes()
+
+ length, err := task.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
+ // Since we bypassed the compiler's escape analysis, indicate that f
+ // must live until the use above.
+ runtime.KeepAlive(f)
+ return length, err
+}
+
+// CopyOut implements marshal.Marshallable.CopyOut.
+//go:nosplit
+func (f *FUSEGetAttrIn) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
+ return f.CopyOutN(task, addr, f.SizeBytes())
+}
+
+// CopyIn implements marshal.Marshallable.CopyIn.
+//go:nosplit
+func (f *FUSEGetAttrIn) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(f)))
+ hdr.Len = f.SizeBytes()
+ hdr.Cap = f.SizeBytes()
+
+ length, err := task.CopyInBytes(addr, buf) // escapes: okay.
+ // Since we bypassed the compiler's escape analysis, indicate that f
+ // must live until the use above.
+ runtime.KeepAlive(f)
+ return length, err
+}
+
+// WriteTo implements io.WriterTo.WriteTo.
+func (f *FUSEGetAttrIn) WriteTo(w io.Writer) (int64, error) {
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(f)))
+ hdr.Len = f.SizeBytes()
+ hdr.Cap = f.SizeBytes()
+
+ length, err := w.Write(buf)
+ // Since we bypassed the compiler's escape analysis, indicate that f
+ // must live until the use above.
+ runtime.KeepAlive(f)
+ return int64(length), err
+}
+
+// SizeBytes implements marshal.Marshallable.SizeBytes.
+func (f *FUSEAttr) SizeBytes() int {
+ return 88
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (f *FUSEAttr) MarshalBytes(dst []byte) {
+ usermem.ByteOrder.PutUint64(dst[:8], uint64(f.Ino))
+ dst = dst[8:]
+ usermem.ByteOrder.PutUint64(dst[:8], uint64(f.Size))
+ dst = dst[8:]
+ usermem.ByteOrder.PutUint64(dst[:8], uint64(f.Blocks))
+ dst = dst[8:]
+ usermem.ByteOrder.PutUint64(dst[:8], uint64(f.Atime))
+ dst = dst[8:]
+ usermem.ByteOrder.PutUint64(dst[:8], uint64(f.Mtime))
+ dst = dst[8:]
+ usermem.ByteOrder.PutUint64(dst[:8], uint64(f.Ctime))
+ dst = dst[8:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.AtimeNsec))
+ dst = dst[4:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.MtimeNsec))
+ dst = dst[4:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.CtimeNsec))
+ dst = dst[4:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.Mode))
+ dst = dst[4:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.Nlink))
+ dst = dst[4:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.UID))
+ dst = dst[4:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.GID))
+ dst = dst[4:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.Rdev))
+ dst = dst[4:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.BlkSize))
+ dst = dst[4:]
+ // Padding: dst[:sizeof(uint32)] ~= uint32(0)
+ dst = dst[4:]
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (f *FUSEAttr) UnmarshalBytes(src []byte) {
+ f.Ino = uint64(usermem.ByteOrder.Uint64(src[:8]))
+ src = src[8:]
+ f.Size = uint64(usermem.ByteOrder.Uint64(src[:8]))
+ src = src[8:]
+ f.Blocks = uint64(usermem.ByteOrder.Uint64(src[:8]))
+ src = src[8:]
+ f.Atime = uint64(usermem.ByteOrder.Uint64(src[:8]))
+ src = src[8:]
+ f.Mtime = uint64(usermem.ByteOrder.Uint64(src[:8]))
+ src = src[8:]
+ f.Ctime = uint64(usermem.ByteOrder.Uint64(src[:8]))
+ src = src[8:]
+ f.AtimeNsec = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ f.MtimeNsec = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ f.CtimeNsec = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ f.Mode = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ f.Nlink = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ f.UID = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ f.GID = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ f.Rdev = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ f.BlkSize = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ // Padding: var _ uint32 ~= src[:sizeof(uint32)]
+ src = src[4:]
+}
+
+// Packed implements marshal.Marshallable.Packed.
+//go:nosplit
+func (f *FUSEAttr) Packed() bool {
+ return true
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (f *FUSEAttr) MarshalUnsafe(dst []byte) {
+ safecopy.CopyIn(dst, unsafe.Pointer(f))
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (f *FUSEAttr) UnmarshalUnsafe(src []byte) {
+ safecopy.CopyOut(unsafe.Pointer(f), src)
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (f *FUSEAttr) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(f)))
+ hdr.Len = f.SizeBytes()
+ hdr.Cap = f.SizeBytes()
+
+ length, err := task.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
+ // Since we bypassed the compiler's escape analysis, indicate that f
+ // must live until the use above.
+ runtime.KeepAlive(f)
+ return length, err
+}
+
+// CopyOut implements marshal.Marshallable.CopyOut.
+//go:nosplit
+func (f *FUSEAttr) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
+ return f.CopyOutN(task, addr, f.SizeBytes())
+}
+
+// CopyIn implements marshal.Marshallable.CopyIn.
+//go:nosplit
+func (f *FUSEAttr) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(f)))
+ hdr.Len = f.SizeBytes()
+ hdr.Cap = f.SizeBytes()
+
+ length, err := task.CopyInBytes(addr, buf) // escapes: okay.
+ // Since we bypassed the compiler's escape analysis, indicate that f
+ // must live until the use above.
+ runtime.KeepAlive(f)
+ return length, err
+}
+
+// WriteTo implements io.WriterTo.WriteTo.
+func (f *FUSEAttr) WriteTo(w io.Writer) (int64, error) {
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(f)))
+ hdr.Len = f.SizeBytes()
+ hdr.Cap = f.SizeBytes()
+
+ length, err := w.Write(buf)
+ // Since we bypassed the compiler's escape analysis, indicate that f
+ // must live until the use above.
+ runtime.KeepAlive(f)
+ return int64(length), err
+}
+
+// SizeBytes implements marshal.Marshallable.SizeBytes.
+func (f *FUSEGetAttrOut) SizeBytes() int {
+ return 16 +
+ (*FUSEAttr)(nil).SizeBytes()
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (f *FUSEGetAttrOut) MarshalBytes(dst []byte) {
+ usermem.ByteOrder.PutUint64(dst[:8], uint64(f.AttrValid))
+ dst = dst[8:]
+ usermem.ByteOrder.PutUint32(dst[:4], uint32(f.AttrValidNsec))
+ dst = dst[4:]
+ // Padding: dst[:sizeof(uint32)] ~= uint32(0)
+ dst = dst[4:]
+ f.Attr.MarshalBytes(dst[:f.Attr.SizeBytes()])
+ dst = dst[f.Attr.SizeBytes():]
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (f *FUSEGetAttrOut) UnmarshalBytes(src []byte) {
+ f.AttrValid = uint64(usermem.ByteOrder.Uint64(src[:8]))
+ src = src[8:]
+ f.AttrValidNsec = uint32(usermem.ByteOrder.Uint32(src[:4]))
+ src = src[4:]
+ // Padding: var _ uint32 ~= src[:sizeof(uint32)]
+ src = src[4:]
+ f.Attr.UnmarshalBytes(src[:f.Attr.SizeBytes()])
+ src = src[f.Attr.SizeBytes():]
+}
+
+// Packed implements marshal.Marshallable.Packed.
+//go:nosplit
+func (f *FUSEGetAttrOut) Packed() bool {
+ return f.Attr.Packed()
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (f *FUSEGetAttrOut) MarshalUnsafe(dst []byte) {
+ if f.Attr.Packed() {
+ safecopy.CopyIn(dst, unsafe.Pointer(f))
+ } else {
+ // Type FUSEGetAttrOut doesn't have a packed layout in memory, fallback to MarshalBytes.
+ f.MarshalBytes(dst)
+ }
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (f *FUSEGetAttrOut) UnmarshalUnsafe(src []byte) {
+ if f.Attr.Packed() {
+ safecopy.CopyOut(unsafe.Pointer(f), src)
+ } else {
+ // Type FUSEGetAttrOut doesn't have a packed layout in memory, fallback to UnmarshalBytes.
+ f.UnmarshalBytes(src)
+ }
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (f *FUSEGetAttrOut) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
+ if !f.Attr.Packed() {
+ // Type FUSEGetAttrOut doesn't have a packed layout in memory, fall back to MarshalBytes.
+ buf := task.CopyScratchBuffer(f.SizeBytes()) // escapes: okay.
+ f.MarshalBytes(buf) // escapes: fallback.
+ return task.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
+ }
+
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(f)))
+ hdr.Len = f.SizeBytes()
+ hdr.Cap = f.SizeBytes()
+
+ length, err := task.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
+ // Since we bypassed the compiler's escape analysis, indicate that f
+ // must live until the use above.
+ runtime.KeepAlive(f)
+ return length, err
+}
+
+// CopyOut implements marshal.Marshallable.CopyOut.
+//go:nosplit
+func (f *FUSEGetAttrOut) CopyOut(task marshal.Task, addr usermem.Addr) (int, error) {
+ return f.CopyOutN(task, addr, f.SizeBytes())
+}
+
+// CopyIn implements marshal.Marshallable.CopyIn.
+//go:nosplit
+func (f *FUSEGetAttrOut) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
+ if !f.Attr.Packed() {
+ // Type FUSEGetAttrOut doesn't have a packed layout in memory, fall back to UnmarshalBytes.
+ buf := task.CopyScratchBuffer(f.SizeBytes()) // escapes: okay.
+ length, err := task.CopyInBytes(addr, buf) // escapes: okay.
+ // Unmarshal unconditionally. If we had a short copy-in, this results in a
+ // partially unmarshalled struct.
+ f.UnmarshalBytes(buf) // escapes: fallback.
+ return length, err
+ }
+
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(f)))
+ hdr.Len = f.SizeBytes()
+ hdr.Cap = f.SizeBytes()
+
+ length, err := task.CopyInBytes(addr, buf) // escapes: okay.
+ // Since we bypassed the compiler's escape analysis, indicate that f
+ // must live until the use above.
+ runtime.KeepAlive(f)
+ return length, err
+}
+
+// WriteTo implements io.WriterTo.WriteTo.
+func (f *FUSEGetAttrOut) WriteTo(w io.Writer) (int64, error) {
+ if !f.Attr.Packed() {
+ // Type FUSEGetAttrOut doesn't have a packed layout in memory, fall back to MarshalBytes.
+ buf := make([]byte, f.SizeBytes())
+ f.MarshalBytes(buf)
+ length, err := w.Write(buf)
+ return int64(length), err
+ }
+
+ // Construct a slice backed by dst's underlying memory.
+ var buf []byte
+ hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+ hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(f)))
+ hdr.Len = f.SizeBytes()
+ hdr.Cap = f.SizeBytes()
+
+ length, err := w.Write(buf)
+ // Since we bypassed the compiler's escape analysis, indicate that f
+ // must live until the use above.
+ runtime.KeepAlive(f)
+ return int64(length), err
+}
+
+// SizeBytes implements marshal.Marshallable.SizeBytes.
func (r *RobustListHead) SizeBytes() int {
return 24
}
@@ -1818,7 +2204,7 @@ func (i *IPTIP) UnmarshalBytes(src []byte) {
// Packed implements marshal.Marshallable.Packed.
//go:nosplit
func (i *IPTIP) Packed() bool {
- return i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed()
+ return i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed()
}
// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
@@ -1844,7 +2230,7 @@ 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.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() && i.Dst.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.
@@ -1900,7 +2286,7 @@ func (i *IPTIP) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
// WriteTo implements io.WriterTo.WriteTo.
func (i *IPTIP) WriteTo(w io.Writer) (int64, error) {
- if !i.DstMask.Packed() && i.Src.Packed() && i.Dst.Packed() && i.SrcMask.Packed() {
+ if !i.Dst.Packed() && i.SrcMask.Packed() && i.DstMask.Packed() && i.Src.Packed() {
// Type IPTIP doesn't have a packed layout in memory, fall back to MarshalBytes.
buf := make([]byte, i.SizeBytes())
i.MarshalBytes(buf)
diff --git a/pkg/sentry/fsimpl/fuse/fusefs.go b/pkg/sentry/fsimpl/fuse/fusefs.go
index a1405f7c3..83c24ec25 100644
--- a/pkg/sentry/fsimpl/fuse/fusefs.go
+++ b/pkg/sentry/fsimpl/fuse/fusefs.go
@@ -226,3 +226,99 @@ func (i *inode) Open(ctx context.Context, rp *vfs.ResolvingPath, vfsd *vfs.Dentr
}
return fd.VFSFileDescription(), nil
}
+
+// statFromFUSEAttr makes attributes from linux.FUSEAttr to linux.Statx. The
+// opts.Sync attribute is ignored since the synchronization is handled by the
+// FUSE server.
+func statFromFUSEAttr(attr linux.FUSEAttr, mask, devMinor uint32) linux.Statx {
+ var stat linux.Statx
+ stat.Blksize = attr.BlkSize
+ stat.DevMajor, stat.DevMinor = linux.UNNAMED_MAJOR, devMinor
+
+ rdevMajor, rdevMinor := linux.DecodeDeviceID(attr.Rdev)
+ stat.RdevMajor, stat.RdevMinor = uint32(rdevMajor), rdevMinor
+
+ if mask&linux.STATX_MODE != 0 {
+ stat.Mode = uint16(attr.Mode)
+ }
+ if mask&linux.STATX_NLINK != 0 {
+ stat.Nlink = attr.Nlink
+ }
+ if mask&linux.STATX_UID != 0 {
+ stat.UID = attr.UID
+ }
+ if mask&linux.STATX_GID != 0 {
+ stat.GID = attr.GID
+ }
+ if mask&linux.STATX_ATIME != 0 {
+ stat.Atime = linux.StatxTimestamp{
+ Sec: int64(attr.Atime),
+ Nsec: attr.AtimeNsec,
+ }
+ }
+ if mask&linux.STATX_MTIME != 0 {
+ stat.Mtime = linux.StatxTimestamp{
+ Sec: int64(attr.Mtime),
+ Nsec: attr.MtimeNsec,
+ }
+ }
+ if mask&linux.STATX_CTIME != 0 {
+ stat.Ctime = linux.StatxTimestamp{
+ Sec: int64(attr.Ctime),
+ Nsec: attr.CtimeNsec,
+ }
+ }
+ if mask&linux.STATX_INO != 0 {
+ stat.Ino = attr.Ino
+ }
+ if mask&linux.STATX_SIZE != 0 {
+ stat.Size = attr.Size
+ }
+ if mask&linux.STATX_BLOCKS != 0 {
+ stat.Blocks = attr.Blocks
+ }
+ return stat
+}
+
+// Stat implements kernfs.Inode.Stat.
+func (i *inode) Stat(ctx context.Context, fs *vfs.Filesystem, opts vfs.StatOptions) (linux.Statx, error) {
+ fusefs := fs.Impl().(*filesystem)
+ conn := fusefs.conn
+ task, creds := kernel.TaskFromContext(ctx), auth.CredentialsFromContext(ctx)
+ if task == nil {
+ log.Warningf("couldn't get kernel task from context")
+ return linux.Statx{}, syserror.EINVAL
+ }
+
+ var in linux.FUSEGetAttrIn
+ // We don't set any attribute in the request, because in VFS2 fstat(2) will
+ // finally be translated into vfs.FilesystemImpl.StatAt() (see
+ // pkg/sentry/syscalls/linux/vfs2/stat.go), resulting in the same flow
+ // as stat(2). Thus GetAttrFlags and Fh variable will never be used in VFS2.
+ req, err := conn.NewRequest(creds, uint32(task.ThreadID()), i.Ino(), linux.FUSE_GETATTR, &in)
+ if err != nil {
+ return linux.Statx{}, err
+ }
+
+ res, err := conn.Call(task, req)
+ if err != nil {
+ return linux.Statx{}, err
+ }
+ if err := res.Error(); err != nil {
+ return linux.Statx{}, err
+ }
+
+ var out linux.FUSEGetAttrOut
+ if err := res.UnmarshalPayload(&out); err != nil {
+ return linux.Statx{}, err
+ }
+
+ // Set all metadata into kernfs.InodeAttrs.
+ if err := i.SetStat(ctx, fs, creds, vfs.SetStatOptions{
+ Stat: statFromFUSEAttr(out.Attr, linux.STATX_ALL, fusefs.devMinor),
+ }); err != nil {
+ return linux.Statx{}, err
+ }
+
+ return statFromFUSEAttr(out.Attr, opts.Mask, fusefs.devMinor), nil
+}
diff --git a/pkg/sentry/platform/ring0/defs_impl_arm64.go b/pkg/sentry/platform/ring0/defs_impl_arm64.go
index 424b66f76..eba2eac30 100644
--- a/pkg/sentry/platform/ring0/defs_impl_arm64.go
+++ b/pkg/sentry/platform/ring0/defs_impl_arm64.go
@@ -3,11 +3,11 @@ package ring0
import (
"gvisor.dev/gvisor/pkg/sentry/arch"
"gvisor.dev/gvisor/pkg/sentry/platform/ring0/pagetables"
+ "io"
+ "reflect"
"fmt"
"gvisor.dev/gvisor/pkg/usermem"
- "io"
- "reflect"
)
// Useful bits.
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 20:02:32 +0000