vendor: update c/{common,storage}

Closes: https://github.com/containers/podman/issues/25572

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

vendor/github.com/pkg/sftp/client.go

@@ -17,6 +17,8 @@ import (
 
 	"github.com/kr/fs"
 	"golang.org/x/crypto/ssh"
+
+	"github.com/pkg/sftp/internal/encoding/ssh/filexfer/openssh"
 )
 
 var (
@@ -758,20 +760,39 @@ func (c *Client) Join(elem ...string) string { return path.Join(elem...) }
 // file or directory with the specified path exists, or if the specified directory
 // is not empty.
 func (c *Client) Remove(path string) error {
-	err := c.removeFile(path)
-	// some servers, *cough* osx *cough*, return EPERM, not ENODIR.
-	// serv-u returns ssh_FX_FILE_IS_A_DIRECTORY
-	// EPERM is converted to os.ErrPermission so it is not a StatusError
-	if err, ok := err.(*StatusError); ok {
-		switch err.Code {
-		case sshFxFailure, sshFxFileIsADirectory:
-			return c.RemoveDirectory(path)
+	errF := c.removeFile(path)
+	if errF == nil {
+		return nil
+	}
+
+	errD := c.RemoveDirectory(path)
+	if errD == nil {
+		return nil
+	}
+
+	// Both failed: figure out which error to return.
+
+	if errF, ok := errF.(*os.PathError); ok {
+		// The only time it makes sense to compare errors, is when both are `*os.PathError`.
+		// We cannot test these directly with errF == errD, as that would be a pointer comparison.
+
+		if errD, ok := errD.(*os.PathError); ok && errors.Is(errF.Err, errD.Err) {
+			// If they are both pointers to PathError,
+			// and the same underlying error, then return that.
+			return errF
 		}
 	}
-	if os.IsPermission(err) {
-		return c.RemoveDirectory(path)
+
+	fi, err := c.Stat(path)
+	if err != nil {
+		return err
 	}
-	return err
+
+	if fi.IsDir() {
+		return errD
+	}
+
+	return errF
 }
 
 func (c *Client) removeFile(path string) error {
@@ -785,7 +806,15 @@ func (c *Client) removeFile(path string) error {
 	}
 	switch typ {
 	case sshFxpStatus:
-		return normaliseError(unmarshalStatus(id, data))
+		err = normaliseError(unmarshalStatus(id, data))
+		if err == nil {
+			return nil
+		}
+		return &os.PathError{
+			Op:   "remove",
+			Path: path,
+			Err:  err,
+		}
 	default:
 		return unimplementedPacketErr(typ)
 	}
@@ -803,7 +832,15 @@ func (c *Client) RemoveDirectory(path string) error {
 	}
 	switch typ {
 	case sshFxpStatus:
-		return normaliseError(unmarshalStatus(id, data))
+		err = normaliseError(unmarshalStatus(id, data))
+		if err == nil {
+			return nil
+		}
+		return &os.PathError{
+			Op:   "remove",
+			Path: path,
+			Err:  err,
+		}
 	default:
 		return unimplementedPacketErr(typ)
 	}
@@ -1805,7 +1842,8 @@ func (f *File) readFromWithConcurrency(r io.Reader, concurrency int) (read int64
 		off := f.offset
 
 		for {
-			n, err := r.Read(b)
+			// Fill the entire buffer.
+			n, err := io.ReadFull(r, b)
 
 			if n > 0 {
 				read += int64(n)
@@ -1831,7 +1869,7 @@ func (f *File) readFromWithConcurrency(r io.Reader, concurrency int) (read int64
 			}
 
 			if err != nil {
-				if err != io.EOF {
+				if !errors.Is(err, io.EOF) && !errors.Is(err, io.ErrUnexpectedEOF) {
 					errCh <- rwErr{off, err}
 				}
 				return
@@ -1985,7 +2023,8 @@ func (f *File) ReadFrom(r io.Reader) (int64, error) {
 
 	var read int64
 	for {
-		n, err := r.Read(b)
+		// Fill the entire buffer.
+		n, err := io.ReadFull(r, b)
 		if n < 0 {
 			panic("sftp.File: reader returned negative count from Read")
 		}
@@ -2002,7 +2041,7 @@ func (f *File) ReadFrom(r io.Reader) (int64, error) {
 		}
 
 		if err != nil {
-			if err == io.EOF {
+			if errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF) {
 				return read, nil // return nil explicitly.
 			}
 
@@ -2122,6 +2161,13 @@ func (f *File) Sync() error {
 		return os.ErrClosed
 	}
 
+	if data, ok := f.c.HasExtension(openssh.ExtensionFSync().Name); !ok || data != "1" {
+		return &StatusError{
+			Code: sshFxOPUnsupported,
+			msg:  "fsync not supported",
+		}
+	}
+
 	id := f.c.nextID()
 	typ, data, err := f.c.sendPacket(context.Background(), nil, &sshFxpFsyncPacket{
 		ID:     id,

vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/openssh/fsync.go

@@ -0,0 +1,73 @@
+package openssh
+
+import (
+	sshfx "github.com/pkg/sftp/internal/encoding/ssh/filexfer"
+)
+
+const extensionFSync = "fsync@openssh.com"
+
+// RegisterExtensionFSync registers the "fsync@openssh.com" extended packet with the encoding/ssh/filexfer package.
+func RegisterExtensionFSync() {
+	sshfx.RegisterExtendedPacketType(extensionFSync, func() sshfx.ExtendedData {
+		return new(FSyncExtendedPacket)
+	})
+}
+
+// ExtensionFSync returns an ExtensionPair suitable to append into an sshfx.InitPacket or sshfx.VersionPacket.
+func ExtensionFSync() *sshfx.ExtensionPair {
+	return &sshfx.ExtensionPair{
+		Name: extensionFSync,
+		Data: "1",
+	}
+}
+
+// FSyncExtendedPacket defines the fsync@openssh.com extend packet.
+type FSyncExtendedPacket struct {
+	Handle string
+}
+
+// Type returns the SSH_FXP_EXTENDED packet type.
+func (ep *FSyncExtendedPacket) Type() sshfx.PacketType {
+	return sshfx.PacketTypeExtended
+}
+
+// MarshalPacket returns ep as a two-part binary encoding of the full extended packet.
+func (ep *FSyncExtendedPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
+	p := &sshfx.ExtendedPacket{
+		ExtendedRequest: extensionFSync,
+
+		Data: ep,
+	}
+	return p.MarshalPacket(reqid, b)
+}
+
+// MarshalInto encodes ep into the binary encoding of the fsync@openssh.com extended packet-specific data.
+func (ep *FSyncExtendedPacket) MarshalInto(buf *sshfx.Buffer) {
+	buf.AppendString(ep.Handle)
+}
+
+// MarshalBinary encodes ep into the binary encoding of the fsync@openssh.com extended packet-specific data.
+//
+// NOTE: This _only_ encodes the packet-specific data, it does not encode the full extended packet.
+func (ep *FSyncExtendedPacket) MarshalBinary() ([]byte, error) {
+	// string(handle)
+	size := 4 + len(ep.Handle)
+
+	buf := sshfx.NewBuffer(make([]byte, 0, size))
+	ep.MarshalInto(buf)
+	return buf.Bytes(), nil
+}
+
+// UnmarshalFrom decodes the fsync@openssh.com extended packet-specific data from buf.
+func (ep *FSyncExtendedPacket) UnmarshalFrom(buf *sshfx.Buffer) (err error) {
+	*ep = FSyncExtendedPacket{
+		Handle: buf.ConsumeString(),
+	}
+
+	return buf.Err
+}
+
+// UnmarshalBinary decodes the fsync@openssh.com extended packet-specific data into ep.
+func (ep *FSyncExtendedPacket) UnmarshalBinary(data []byte) (err error) {
+	return ep.UnmarshalFrom(sshfx.NewBuffer(data))
+}

vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/openssh/hardlink.go

@@ -0,0 +1,76 @@
+package openssh
+
+import (
+	sshfx "github.com/pkg/sftp/internal/encoding/ssh/filexfer"
+)
+
+const extensionHardlink = "hardlink@openssh.com"
+
+// RegisterExtensionHardlink registers the "hardlink@openssh.com" extended packet with the encoding/ssh/filexfer package.
+func RegisterExtensionHardlink() {
+	sshfx.RegisterExtendedPacketType(extensionHardlink, func() sshfx.ExtendedData {
+		return new(HardlinkExtendedPacket)
+	})
+}
+
+// ExtensionHardlink returns an ExtensionPair suitable to append into an sshfx.InitPacket or sshfx.VersionPacket.
+func ExtensionHardlink() *sshfx.ExtensionPair {
+	return &sshfx.ExtensionPair{
+		Name: extensionHardlink,
+		Data: "1",
+	}
+}
+
+// HardlinkExtendedPacket defines the hardlink@openssh.com extend packet.
+type HardlinkExtendedPacket struct {
+	OldPath string
+	NewPath string
+}
+
+// Type returns the SSH_FXP_EXTENDED packet type.
+func (ep *HardlinkExtendedPacket) Type() sshfx.PacketType {
+	return sshfx.PacketTypeExtended
+}
+
+// MarshalPacket returns ep as a two-part binary encoding of the full extended packet.
+func (ep *HardlinkExtendedPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
+	p := &sshfx.ExtendedPacket{
+		ExtendedRequest: extensionHardlink,
+
+		Data: ep,
+	}
+	return p.MarshalPacket(reqid, b)
+}
+
+// MarshalInto encodes ep into the binary encoding of the hardlink@openssh.com extended packet-specific data.
+func (ep *HardlinkExtendedPacket) MarshalInto(buf *sshfx.Buffer) {
+	buf.AppendString(ep.OldPath)
+	buf.AppendString(ep.NewPath)
+}
+
+// MarshalBinary encodes ep into the binary encoding of the hardlink@openssh.com extended packet-specific data.
+//
+// NOTE: This _only_ encodes the packet-specific data, it does not encode the full extended packet.
+func (ep *HardlinkExtendedPacket) MarshalBinary() ([]byte, error) {
+	// string(oldpath) + string(newpath)
+	size := 4 + len(ep.OldPath) + 4 + len(ep.NewPath)
+
+	buf := sshfx.NewBuffer(make([]byte, 0, size))
+	ep.MarshalInto(buf)
+	return buf.Bytes(), nil
+}
+
+// UnmarshalFrom decodes the hardlink@openssh.com extended packet-specific data from buf.
+func (ep *HardlinkExtendedPacket) UnmarshalFrom(buf *sshfx.Buffer) (err error) {
+	*ep = HardlinkExtendedPacket{
+		OldPath: buf.ConsumeString(),
+		NewPath: buf.ConsumeString(),
+	}
+
+	return buf.Err
+}
+
+// UnmarshalBinary decodes the hardlink@openssh.com extended packet-specific data into ep.
+func (ep *HardlinkExtendedPacket) UnmarshalBinary(data []byte) (err error) {
+	return ep.UnmarshalFrom(sshfx.NewBuffer(data))
+}

vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/openssh/openssh.go

@@ -0,0 +1,2 @@
+// Package openssh implements the openssh secsh-filexfer extensions as described in https://github.com/openssh/openssh-portable/blob/master/PROTOCOL
+package openssh

vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/openssh/posix-rename.go

@@ -0,0 +1,76 @@
+package openssh
+
+import (
+	sshfx "github.com/pkg/sftp/internal/encoding/ssh/filexfer"
+)
+
+const extensionPOSIXRename = "posix-rename@openssh.com"
+
+// RegisterExtensionPOSIXRename registers the "posix-rename@openssh.com" extended packet with the encoding/ssh/filexfer package.
+func RegisterExtensionPOSIXRename() {
+	sshfx.RegisterExtendedPacketType(extensionPOSIXRename, func() sshfx.ExtendedData {
+		return new(POSIXRenameExtendedPacket)
+	})
+}
+
+// ExtensionPOSIXRename returns an ExtensionPair suitable to append into an sshfx.InitPacket or sshfx.VersionPacket.
+func ExtensionPOSIXRename() *sshfx.ExtensionPair {
+	return &sshfx.ExtensionPair{
+		Name: extensionPOSIXRename,
+		Data: "1",
+	}
+}
+
+// POSIXRenameExtendedPacket defines the posix-rename@openssh.com extend packet.
+type POSIXRenameExtendedPacket struct {
+	OldPath string
+	NewPath string
+}
+
+// Type returns the SSH_FXP_EXTENDED packet type.
+func (ep *POSIXRenameExtendedPacket) Type() sshfx.PacketType {
+	return sshfx.PacketTypeExtended
+}
+
+// MarshalPacket returns ep as a two-part binary encoding of the full extended packet.
+func (ep *POSIXRenameExtendedPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
+	p := &sshfx.ExtendedPacket{
+		ExtendedRequest: extensionPOSIXRename,
+
+		Data: ep,
+	}
+	return p.MarshalPacket(reqid, b)
+}
+
+// MarshalInto encodes ep into the binary encoding of the hardlink@openssh.com extended packet-specific data.
+func (ep *POSIXRenameExtendedPacket) MarshalInto(buf *sshfx.Buffer) {
+	buf.AppendString(ep.OldPath)
+	buf.AppendString(ep.NewPath)
+}
+
+// MarshalBinary encodes ep into the binary encoding of the hardlink@openssh.com extended packet-specific data.
+//
+// NOTE: This _only_ encodes the packet-specific data, it does not encode the full extended packet.
+func (ep *POSIXRenameExtendedPacket) MarshalBinary() ([]byte, error) {
+	// string(oldpath) + string(newpath)
+	size := 4 + len(ep.OldPath) + 4 + len(ep.NewPath)
+
+	buf := sshfx.NewBuffer(make([]byte, 0, size))
+	ep.MarshalInto(buf)
+	return buf.Bytes(), nil
+}
+
+// UnmarshalFrom decodes the hardlink@openssh.com extended packet-specific data from buf.
+func (ep *POSIXRenameExtendedPacket) UnmarshalFrom(buf *sshfx.Buffer) (err error) {
+	*ep = POSIXRenameExtendedPacket{
+		OldPath: buf.ConsumeString(),
+		NewPath: buf.ConsumeString(),
+	}
+
+	return buf.Err
+}
+
+// UnmarshalBinary decodes the hardlink@openssh.com extended packet-specific data into ep.
+func (ep *POSIXRenameExtendedPacket) UnmarshalBinary(data []byte) (err error) {
+	return ep.UnmarshalFrom(sshfx.NewBuffer(data))
+}

vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/openssh/statvfs.go

@@ -0,0 +1,236 @@
+package openssh
+
+import (
+	sshfx "github.com/pkg/sftp/internal/encoding/ssh/filexfer"
+)
+
+const extensionStatVFS = "statvfs@openssh.com"
+
+// RegisterExtensionStatVFS registers the "statvfs@openssh.com" extended packet with the encoding/ssh/filexfer package.
+func RegisterExtensionStatVFS() {
+	sshfx.RegisterExtendedPacketType(extensionStatVFS, func() sshfx.ExtendedData {
+		return new(StatVFSExtendedPacket)
+	})
+}
+
+// ExtensionStatVFS returns an ExtensionPair suitable to append into an sshfx.InitPacket or sshfx.VersionPacket.
+func ExtensionStatVFS() *sshfx.ExtensionPair {
+	return &sshfx.ExtensionPair{
+		Name: extensionStatVFS,
+		Data: "2",
+	}
+}
+
+// StatVFSExtendedPacket defines the statvfs@openssh.com extend packet.
+type StatVFSExtendedPacket struct {
+	Path string
+}
+
+// Type returns the SSH_FXP_EXTENDED packet type.
+func (ep *StatVFSExtendedPacket) Type() sshfx.PacketType {
+	return sshfx.PacketTypeExtended
+}
+
+// MarshalPacket returns ep as a two-part binary encoding of the full extended packet.
+func (ep *StatVFSExtendedPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
+	p := &sshfx.ExtendedPacket{
+		ExtendedRequest: extensionStatVFS,
+
+		Data: ep,
+	}
+	return p.MarshalPacket(reqid, b)
+}
+
+// MarshalInto encodes ep into the binary encoding of the statvfs@openssh.com extended packet-specific data.
+func (ep *StatVFSExtendedPacket) MarshalInto(buf *sshfx.Buffer) {
+	buf.AppendString(ep.Path)
+}
+
+// MarshalBinary encodes ep into the binary encoding of the statvfs@openssh.com extended packet-specific data.
+//
+// NOTE: This _only_ encodes the packet-specific data, it does not encode the full extended packet.
+func (ep *StatVFSExtendedPacket) MarshalBinary() ([]byte, error) {
+	size := 4 + len(ep.Path) // string(path)
+
+	buf := sshfx.NewBuffer(make([]byte, 0, size))
+
+	ep.MarshalInto(buf)
+
+	return buf.Bytes(), nil
+}
+
+// UnmarshalFrom decodes the statvfs@openssh.com extended packet-specific data into ep.
+func (ep *StatVFSExtendedPacket) UnmarshalFrom(buf *sshfx.Buffer) (err error) {
+	*ep = StatVFSExtendedPacket{
+		Path: buf.ConsumeString(),
+	}
+
+	return buf.Err
+}
+
+// UnmarshalBinary decodes the statvfs@openssh.com extended packet-specific data into ep.
+func (ep *StatVFSExtendedPacket) UnmarshalBinary(data []byte) (err error) {
+	return ep.UnmarshalFrom(sshfx.NewBuffer(data))
+}
+
+const extensionFStatVFS = "fstatvfs@openssh.com"
+
+// RegisterExtensionFStatVFS registers the "fstatvfs@openssh.com" extended packet with the encoding/ssh/filexfer package.
+func RegisterExtensionFStatVFS() {
+	sshfx.RegisterExtendedPacketType(extensionFStatVFS, func() sshfx.ExtendedData {
+		return new(FStatVFSExtendedPacket)
+	})
+}
+
+// ExtensionFStatVFS returns an ExtensionPair suitable to append into an sshfx.InitPacket or sshfx.VersionPacket.
+func ExtensionFStatVFS() *sshfx.ExtensionPair {
+	return &sshfx.ExtensionPair{
+		Name: extensionFStatVFS,
+		Data: "2",
+	}
+}
+
+// FStatVFSExtendedPacket defines the fstatvfs@openssh.com extend packet.
+type FStatVFSExtendedPacket struct {
+	Path string
+}
+
+// Type returns the SSH_FXP_EXTENDED packet type.
+func (ep *FStatVFSExtendedPacket) Type() sshfx.PacketType {
+	return sshfx.PacketTypeExtended
+}
+
+// MarshalPacket returns ep as a two-part binary encoding of the full extended packet.
+func (ep *FStatVFSExtendedPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
+	p := &sshfx.ExtendedPacket{
+		ExtendedRequest: extensionFStatVFS,
+
+		Data: ep,
+	}
+	return p.MarshalPacket(reqid, b)
+}
+
+// MarshalInto encodes ep into the binary encoding of the statvfs@openssh.com extended packet-specific data.
+func (ep *FStatVFSExtendedPacket) MarshalInto(buf *sshfx.Buffer) {
+	buf.AppendString(ep.Path)
+}
+
+// MarshalBinary encodes ep into the binary encoding of the statvfs@openssh.com extended packet-specific data.
+//
+// NOTE: This _only_ encodes the packet-specific data, it does not encode the full extended packet.
+func (ep *FStatVFSExtendedPacket) MarshalBinary() ([]byte, error) {
+	size := 4 + len(ep.Path) // string(path)
+
+	buf := sshfx.NewBuffer(make([]byte, 0, size))
+
+	ep.MarshalInto(buf)
+
+	return buf.Bytes(), nil
+}
+
+// UnmarshalFrom decodes the statvfs@openssh.com extended packet-specific data into ep.
+func (ep *FStatVFSExtendedPacket) UnmarshalFrom(buf *sshfx.Buffer) (err error) {
+	*ep = FStatVFSExtendedPacket{
+		Path: buf.ConsumeString(),
+	}
+
+	return buf.Err
+}
+
+// UnmarshalBinary decodes the statvfs@openssh.com extended packet-specific data into ep.
+func (ep *FStatVFSExtendedPacket) UnmarshalBinary(data []byte) (err error) {
+	return ep.UnmarshalFrom(sshfx.NewBuffer(data))
+}
+
+// The values for the MountFlags field.
+// https://github.com/openssh/openssh-portable/blob/master/PROTOCOL
+const (
+	MountFlagsReadOnly = 0x1 // SSH_FXE_STATVFS_ST_RDONLY
+	MountFlagsNoSUID   = 0x2 // SSH_FXE_STATVFS_ST_NOSUID
+)
+
+// StatVFSExtendedReplyPacket defines the extended reply packet for statvfs@openssh.com and fstatvfs@openssh.com requests.
+type StatVFSExtendedReplyPacket struct {
+	BlockSize     uint64 /* f_bsize:   file system block size */
+	FragmentSize  uint64 /* f_frsize:  fundamental fs block size / fagment size */
+	Blocks        uint64 /* f_blocks:  number of blocks (unit f_frsize) */
+	BlocksFree    uint64 /* f_bfree:   free blocks in filesystem */
+	BlocksAvail   uint64 /* f_bavail:  free blocks for non-root */
+	Files         uint64 /* f_files:   total file inodes */
+	FilesFree     uint64 /* f_ffree:   free file inodes */
+	FilesAvail    uint64 /* f_favail:  free file inodes for to non-root */
+	FilesystemID  uint64 /* f_fsid:    file system id */
+	MountFlags    uint64 /* f_flag:    bit mask of mount flag values */
+	MaxNameLength uint64 /* f_namemax: maximum filename length */
+}
+
+// Type returns the SSH_FXP_EXTENDED_REPLY packet type.
+func (ep *StatVFSExtendedReplyPacket) Type() sshfx.PacketType {
+	return sshfx.PacketTypeExtendedReply
+}
+
+// MarshalPacket returns ep as a two-part binary encoding of the full extended reply packet.
+func (ep *StatVFSExtendedReplyPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
+	p := &sshfx.ExtendedReplyPacket{
+		Data: ep,
+	}
+	return p.MarshalPacket(reqid, b)
+}
+
+// UnmarshalPacketBody returns ep as a two-part binary encoding of the full extended reply packet.
+func (ep *StatVFSExtendedReplyPacket) UnmarshalPacketBody(buf *sshfx.Buffer) (err error) {
+	p := &sshfx.ExtendedReplyPacket{
+		Data: ep,
+	}
+	return p.UnmarshalPacketBody(buf)
+}
+
+// MarshalInto encodes ep into the binary encoding of the (f)statvfs@openssh.com extended reply packet-specific data.
+func (ep *StatVFSExtendedReplyPacket) MarshalInto(buf *sshfx.Buffer) {
+	buf.AppendUint64(ep.BlockSize)
+	buf.AppendUint64(ep.FragmentSize)
+	buf.AppendUint64(ep.Blocks)
+	buf.AppendUint64(ep.BlocksFree)
+	buf.AppendUint64(ep.BlocksAvail)
+	buf.AppendUint64(ep.Files)
+	buf.AppendUint64(ep.FilesFree)
+	buf.AppendUint64(ep.FilesAvail)
+	buf.AppendUint64(ep.FilesystemID)
+	buf.AppendUint64(ep.MountFlags)
+	buf.AppendUint64(ep.MaxNameLength)
+}
+
+// MarshalBinary encodes ep into the binary encoding of the (f)statvfs@openssh.com extended reply packet-specific data.
+//
+// NOTE: This _only_ encodes the packet-specific data, it does not encode the full extended reply packet.
+func (ep *StatVFSExtendedReplyPacket) MarshalBinary() ([]byte, error) {
+	size := 11 * 8 // 11 × uint64(various)
+
+	b := sshfx.NewBuffer(make([]byte, 0, size))
+	ep.MarshalInto(b)
+	return b.Bytes(), nil
+}
+
+// UnmarshalFrom decodes the fstatvfs@openssh.com extended reply packet-specific data into ep.
+func (ep *StatVFSExtendedReplyPacket) UnmarshalFrom(buf *sshfx.Buffer) (err error) {
+	*ep = StatVFSExtendedReplyPacket{
+		BlockSize:     buf.ConsumeUint64(),
+		FragmentSize:  buf.ConsumeUint64(),
+		Blocks:        buf.ConsumeUint64(),
+		BlocksFree:    buf.ConsumeUint64(),
+		BlocksAvail:   buf.ConsumeUint64(),
+		Files:         buf.ConsumeUint64(),
+		FilesFree:     buf.ConsumeUint64(),
+		FilesAvail:    buf.ConsumeUint64(),
+		FilesystemID:  buf.ConsumeUint64(),
+		MountFlags:    buf.ConsumeUint64(),
+		MaxNameLength: buf.ConsumeUint64(),
+	}
+
+	return buf.Err
+}
+
+// UnmarshalBinary decodes the fstatvfs@openssh.com extended reply packet-specific data into ep.
+func (ep *StatVFSExtendedReplyPacket) UnmarshalBinary(data []byte) (err error) {
+	return ep.UnmarshalFrom(sshfx.NewBuffer(data))
+}