Merge release-20200622.1-236-g112eb0c5b (automated)

4 files changed, 735 insertions, 9 deletions

diff --git a/pkg/abi/linux/fuse.go b/pkg/abi/linux/fuse.go
new file mode 100644
index 000000000..d3ebbccc4
--- /dev/null
+++ b/pkg/abi/linux/fuse.go
@@ -0,0 +1,143 @@
+// Copyright 2020 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package linux
+
+// +marshal
+type FUSEOpcode uint32
+
+// +marshal
+type FUSEOpID uint64
+
+// Opcodes for FUSE operations. Analogous to the opcodes in include/linux/fuse.h.
+const (
+	FUSE_LOOKUP   FUSEOpcode = 1
+	FUSE_FORGET              = 2 /* no reply */
+	FUSE_GETATTR             = 3
+	FUSE_SETATTR             = 4
+	FUSE_READLINK            = 5
+	FUSE_SYMLINK             = 6
+	_
+	FUSE_MKNOD   = 8
+	FUSE_MKDIR   = 9
+	FUSE_UNLINK  = 10
+	FUSE_RMDIR   = 11
+	FUSE_RENAME  = 12
+	FUSE_LINK    = 13
+	FUSE_OPEN    = 14
+	FUSE_READ    = 15
+	FUSE_WRITE   = 16
+	FUSE_STATFS  = 17
+	FUSE_RELEASE = 18
+	_
+	FUSE_FSYNC        = 20
+	FUSE_SETXATTR     = 21
+	FUSE_GETXATTR     = 22
+	FUSE_LISTXATTR    = 23
+	FUSE_REMOVEXATTR  = 24
+	FUSE_FLUSH        = 25
+	FUSE_INIT         = 26
+	FUSE_OPENDIR      = 27
+	FUSE_READDIR      = 28
+	FUSE_RELEASEDIR   = 29
+	FUSE_FSYNCDIR     = 30
+	FUSE_GETLK        = 31
+	FUSE_SETLK        = 32
+	FUSE_SETLKW       = 33
+	FUSE_ACCESS       = 34
+	FUSE_CREATE       = 35
+	FUSE_INTERRUPT    = 36
+	FUSE_BMAP         = 37
+	FUSE_DESTROY      = 38
+	FUSE_IOCTL        = 39
+	FUSE_POLL         = 40
+	FUSE_NOTIFY_REPLY = 41
+	FUSE_BATCH_FORGET = 42
+)
+
+const (
+	// FUSE_MIN_READ_BUFFER is the minimum size the read can be for any FUSE filesystem.
+	// This is the minimum size Linux supports. See linux.fuse.h.
+	FUSE_MIN_READ_BUFFER uint32 = 8192
+)
+
+// FUSEHeaderIn is the header read by the daemon with each request.
+//
+// +marshal
+type FUSEHeaderIn struct {
+	// Len specifies the total length of the data, including this header.
+	Len uint32
+
+	// Opcode specifies the kind of operation of the request.
+	Opcode FUSEOpcode
+
+	// Unique specifies the unique identifier for this request.
+	Unique FUSEOpID
+
+	// NodeID is the ID of the filesystem object being operated on.
+	NodeID uint64
+
+	// UID is the UID of the requesting process.
+	UID uint32
+
+	// GID is the GID of the requesting process.
+	GID uint32
+
+	// PID is the PID of the requesting process.
+	PID uint32
+
+	_ uint32
+}
+
+// FUSEHeaderOut is the header written by the daemon when it processes
+// a request and wants to send a reply (almost all operations require a
+// reply; if they do not, this will be explicitly documented).
+//
+// +marshal
+type FUSEHeaderOut struct {
+	// Len specifies the total length of the data, including this header.
+	Len uint32
+
+	// Error specifies the error that occurred (0 if none).
+	Error int32
+
+	// Unique specifies the unique identifier of the corresponding request.
+	Unique FUSEOpID
+}
+
+// FUSEWriteIn is the header written by a daemon when it makes a
+// write request to the FUSE filesystem.
+//
+// +marshal
+type FUSEWriteIn struct {
+	// Fh specifies the file handle that is being written to.
+	Fh uint64
+
+	// Offset is the offset of the write.
+	Offset uint64
+
+	// Size is the size of data being written.
+	Size uint32
+
+	// WriteFlags is the flags used during the write.
+	WriteFlags uint32
+
+	// LockOwner is the ID of the lock owner.
+	LockOwner uint64
+
+	// Flags is the flags for the request.
+	Flags uint32
+
+	_ uint32
+}
diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go
index 540981b56..414a8ec20 100644
--- a/pkg/abi/linux/linux_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go
@@ -15,6 +15,11 @@ import (
 
 // Marshallable types used by this file.
 var _ marshal.Marshallable = (*ControlMessageCredentials)(nil)
+var _ marshal.Marshallable = (*FUSEHeaderIn)(nil)
+var _ marshal.Marshallable = (*FUSEHeaderOut)(nil)
+var _ marshal.Marshallable = (*FUSEOpID)(nil)
+var _ marshal.Marshallable = (*FUSEOpcode)(nil)
+var _ marshal.Marshallable = (*FUSEWriteIn)(nil)
 var _ marshal.Marshallable = (*IFConf)(nil)
 var _ marshal.Marshallable = (*IFReq)(nil)
 var _ marshal.Marshallable = (*IPTEntry)(nil)
@@ -142,7 +147,7 @@ func (s *Statx) Packed() bool {
 
 // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
 func (s *Statx) MarshalUnsafe(dst []byte) {
-    if s.Btime.Packed() && s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() {
+    if s.Ctime.Packed() && s.Mtime.Packed() && s.Atime.Packed() && s.Btime.Packed() {
         safecopy.CopyIn(dst, unsafe.Pointer(s))
     } else {
         // Type Statx doesn't have a packed layout in memory, fallback to MarshalBytes.
@@ -385,6 +390,584 @@ func (s *Statfs) WriteTo(w io.Writer) (int64, error) {
 }
 
 // SizeBytes implements marshal.Marshallable.SizeBytes.
+//go:nosplit
+func (f *FUSEOpcode) SizeBytes() int {
+    return 4
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (f *FUSEOpcode) MarshalBytes(dst []byte) {
+    usermem.ByteOrder.PutUint32(dst[:4], uint32(*f))
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (f *FUSEOpcode) UnmarshalBytes(src []byte) {
+    *f = FUSEOpcode(uint32(usermem.ByteOrder.Uint32(src[:4])))
+}
+
+// Packed implements marshal.Marshallable.Packed.
+//go:nosplit
+func (f *FUSEOpcode) Packed() bool {
+    // Scalar newtypes are always packed.
+    return true
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (f *FUSEOpcode) MarshalUnsafe(dst []byte) {
+    safecopy.CopyIn(dst, unsafe.Pointer(f))
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (f *FUSEOpcode) UnmarshalUnsafe(src []byte) {
+    safecopy.CopyOut(unsafe.Pointer(f), src)
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (f *FUSEOpcode) 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 *FUSEOpcode) 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 *FUSEOpcode) 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 *FUSEOpcode) 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.
+//go:nosplit
+func (f *FUSEOpID) SizeBytes() int {
+    return 8
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (f *FUSEOpID) MarshalBytes(dst []byte) {
+    usermem.ByteOrder.PutUint64(dst[:8], uint64(*f))
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (f *FUSEOpID) UnmarshalBytes(src []byte) {
+    *f = FUSEOpID(uint64(usermem.ByteOrder.Uint64(src[:8])))
+}
+
+// Packed implements marshal.Marshallable.Packed.
+//go:nosplit
+func (f *FUSEOpID) Packed() bool {
+    // Scalar newtypes are always packed.
+    return true
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (f *FUSEOpID) MarshalUnsafe(dst []byte) {
+    safecopy.CopyIn(dst, unsafe.Pointer(f))
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (f *FUSEOpID) UnmarshalUnsafe(src []byte) {
+    safecopy.CopyOut(unsafe.Pointer(f), src)
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (f *FUSEOpID) 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 *FUSEOpID) 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 *FUSEOpID) 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 *FUSEOpID) 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 *FUSEHeaderIn) SizeBytes() int {
+    return 28 +
+        (*FUSEOpcode)(nil).SizeBytes() +
+        (*FUSEOpID)(nil).SizeBytes()
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (f *FUSEHeaderIn) MarshalBytes(dst []byte) {
+    usermem.ByteOrder.PutUint32(dst[:4], uint32(f.Len))
+    dst = dst[4:]
+    f.Opcode.MarshalBytes(dst[:f.Opcode.SizeBytes()])
+    dst = dst[f.Opcode.SizeBytes():]
+    f.Unique.MarshalBytes(dst[:f.Unique.SizeBytes()])
+    dst = dst[f.Unique.SizeBytes():]
+    usermem.ByteOrder.PutUint64(dst[:8], uint64(f.NodeID))
+    dst = dst[8:]
+    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.PID))
+    dst = dst[4:]
+    // Padding: dst[:sizeof(uint32)] ~= uint32(0)
+    dst = dst[4:]
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (f *FUSEHeaderIn) UnmarshalBytes(src []byte) {
+    f.Len = uint32(usermem.ByteOrder.Uint32(src[:4]))
+    src = src[4:]
+    f.Opcode.UnmarshalBytes(src[:f.Opcode.SizeBytes()])
+    src = src[f.Opcode.SizeBytes():]
+    f.Unique.UnmarshalBytes(src[:f.Unique.SizeBytes()])
+    src = src[f.Unique.SizeBytes():]
+    f.NodeID = uint64(usermem.ByteOrder.Uint64(src[:8]))
+    src = src[8:]
+    f.UID = uint32(usermem.ByteOrder.Uint32(src[:4]))
+    src = src[4:]
+    f.GID = uint32(usermem.ByteOrder.Uint32(src[:4]))
+    src = src[4:]
+    f.PID = 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 *FUSEHeaderIn) Packed() bool {
+    return f.Opcode.Packed() && f.Unique.Packed()
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (f *FUSEHeaderIn) MarshalUnsafe(dst []byte) {
+    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.
+        f.MarshalBytes(dst)
+    }
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (f *FUSEHeaderIn) UnmarshalUnsafe(src []byte) {
+    if f.Opcode.Packed() && f.Unique.Packed() {
+        safecopy.CopyOut(unsafe.Pointer(f), src)
+    } else {
+        // Type FUSEHeaderIn doesn't have a packed layout in memory, fallback to UnmarshalBytes.
+        f.UnmarshalBytes(src)
+    }
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (f *FUSEHeaderIn) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
+    if !f.Opcode.Packed() && f.Unique.Packed() {
+        // Type FUSEHeaderIn 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 *FUSEHeaderIn) 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 *FUSEHeaderIn) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
+    if !f.Opcode.Packed() && f.Unique.Packed() {
+        // Type FUSEHeaderIn 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 *FUSEHeaderIn) WriteTo(w io.Writer) (int64, error) {
+    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)
+        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 (f *FUSEHeaderOut) SizeBytes() int {
+    return 8 +
+        (*FUSEOpID)(nil).SizeBytes()
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (f *FUSEHeaderOut) MarshalBytes(dst []byte) {
+    usermem.ByteOrder.PutUint32(dst[:4], uint32(f.Len))
+    dst = dst[4:]
+    usermem.ByteOrder.PutUint32(dst[:4], uint32(f.Error))
+    dst = dst[4:]
+    f.Unique.MarshalBytes(dst[:f.Unique.SizeBytes()])
+    dst = dst[f.Unique.SizeBytes():]
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (f *FUSEHeaderOut) UnmarshalBytes(src []byte) {
+    f.Len = uint32(usermem.ByteOrder.Uint32(src[:4]))
+    src = src[4:]
+    f.Error = int32(usermem.ByteOrder.Uint32(src[:4]))
+    src = src[4:]
+    f.Unique.UnmarshalBytes(src[:f.Unique.SizeBytes()])
+    src = src[f.Unique.SizeBytes():]
+}
+
+// Packed implements marshal.Marshallable.Packed.
+//go:nosplit
+func (f *FUSEHeaderOut) Packed() bool {
+    return f.Unique.Packed()
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (f *FUSEHeaderOut) MarshalUnsafe(dst []byte) {
+    if f.Unique.Packed() {
+        safecopy.CopyIn(dst, unsafe.Pointer(f))
+    } else {
+        // Type FUSEHeaderOut doesn't have a packed layout in memory, fallback to MarshalBytes.
+        f.MarshalBytes(dst)
+    }
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (f *FUSEHeaderOut) UnmarshalUnsafe(src []byte) {
+    if f.Unique.Packed() {
+        safecopy.CopyOut(unsafe.Pointer(f), src)
+    } else {
+        // Type FUSEHeaderOut doesn't have a packed layout in memory, fallback to UnmarshalBytes.
+        f.UnmarshalBytes(src)
+    }
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (f *FUSEHeaderOut) CopyOutN(task marshal.Task, addr usermem.Addr, limit int) (int, error) {
+    if !f.Unique.Packed() {
+        // Type FUSEHeaderOut 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 *FUSEHeaderOut) 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 *FUSEHeaderOut) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
+    if !f.Unique.Packed() {
+        // Type FUSEHeaderOut 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 *FUSEHeaderOut) WriteTo(w io.Writer) (int64, error) {
+    if !f.Unique.Packed() {
+        // Type FUSEHeaderOut 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 (f *FUSEWriteIn) SizeBytes() int {
+    return 40
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (f *FUSEWriteIn) MarshalBytes(dst []byte) {
+    usermem.ByteOrder.PutUint64(dst[:8], uint64(f.Fh))
+    dst = dst[8:]
+    usermem.ByteOrder.PutUint64(dst[:8], uint64(f.Offset))
+    dst = dst[8:]
+    usermem.ByteOrder.PutUint32(dst[:4], uint32(f.Size))
+    dst = dst[4:]
+    usermem.ByteOrder.PutUint32(dst[:4], uint32(f.WriteFlags))
+    dst = dst[4:]
+    usermem.ByteOrder.PutUint64(dst[:8], uint64(f.LockOwner))
+    dst = dst[8:]
+    usermem.ByteOrder.PutUint32(dst[:4], uint32(f.Flags))
+    dst = dst[4:]
+    // Padding: dst[:sizeof(uint32)] ~= uint32(0)
+    dst = dst[4:]
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (f *FUSEWriteIn) UnmarshalBytes(src []byte) {
+    f.Fh = uint64(usermem.ByteOrder.Uint64(src[:8]))
+    src = src[8:]
+    f.Offset = uint64(usermem.ByteOrder.Uint64(src[:8]))
+    src = src[8:]
+    f.Size = uint32(usermem.ByteOrder.Uint32(src[:4]))
+    src = src[4:]
+    f.WriteFlags = uint32(usermem.ByteOrder.Uint32(src[:4]))
+    src = src[4:]
+    f.LockOwner = uint64(usermem.ByteOrder.Uint64(src[:8]))
+    src = src[8:]
+    f.Flags = 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 *FUSEWriteIn) Packed() bool {
+    return true
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (f *FUSEWriteIn) MarshalUnsafe(dst []byte) {
+    safecopy.CopyIn(dst, unsafe.Pointer(f))
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (f *FUSEWriteIn) UnmarshalUnsafe(src []byte) {
+    safecopy.CopyOut(unsafe.Pointer(f), src)
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (f *FUSEWriteIn) 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 *FUSEWriteIn) 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 *FUSEWriteIn) 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 *FUSEWriteIn) 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 (r *RobustListHead) SizeBytes() int {
     return 24
 }
@@ -818,7 +1401,7 @@ func (i *IPTEntry) Packed() bool {
 
 // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
 func (i *IPTEntry) MarshalUnsafe(dst []byte) {
-    if i.Counters.Packed() && i.IP.Packed() {
+    if i.IP.Packed() && i.Counters.Packed() {
         safecopy.CopyIn(dst, unsafe.Pointer(i))
     } else {
         // Type IPTEntry doesn't have a packed layout in memory, fallback to MarshalBytes.
diff --git a/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go b/pkg/abi/linux/linux_amd64_abi_autogen_unsafe.go
index 238af9fb4..42c9623af 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.MTime.Packed() && s.CTime.Packed() && s.ATime.Packed()
+    return s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed()
 }
 
 // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
@@ -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.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 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(w io.Writer) (int64, 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 := 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 bdc129008..4d0ebca49 100644
--- a/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_arm64_abi_autogen_unsafe.go
@@ -300,7 +300,7 @@ func (s *Stat) Packed() bool {
 
 // MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
 func (s *Stat) MarshalUnsafe(dst []byte) {
-    if s.CTime.Packed() && s.ATime.Packed() && s.MTime.Packed() {
+    if s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() {
         safecopy.CopyIn(dst, unsafe.Pointer(s))
     } else {
         // Type Stat doesn't have a packed layout in memory, fallback to MarshalBytes.
@@ -321,7 +321,7 @@ 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.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 := task.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
         s.MarshalBytes(buf) // escapes: fallback.
@@ -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.MTime.Packed() && s.CTime.Packed() && s.ATime.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.
@@ -377,7 +377,7 @@ func (s *Stat) CopyIn(task marshal.Task, addr usermem.Addr) (int, error) {
 
 // WriteTo implements io.WriterTo.WriteTo.
 func (s *Stat) WriteTo(w io.Writer) (int64, error) {
-    if !s.ATime.Packed() && s.MTime.Packed() && s.CTime.Packed() {
+    if !s.CTime.Packed() && s.ATime.Packed() && s.MTime.Packed() {
         // Type Stat doesn't have a packed layout in memory, fall back to MarshalBytes.
         buf := make([]byte, s.SizeBytes())
         s.MarshalBytes(buf)