Minor vfs.FileDescriptionImpl fixes.

- Pass context.Context to OnClose().

- Pass memmap.MMapOpts to ConfigureMMap() by pointer so that implementations
  can actually mutate it as required.

PiperOrigin-RevId: 274934967

pkg/sentry/fsimpl/ext/directory.go

@@ -301,8 +301,8 @@ func (fd *directoryFD) Seek(ctx context.Context, offset int64, whence int32) (in
 	return offset, nil
 }
 
-// IterDirents implements vfs.FileDescriptionImpl.IterDirents.
-func (fd *directoryFD) ConfigureMMap(ctx context.Context, opts memmap.MMapOpts) error {
+// ConfigureMMap implements vfs.FileDescriptionImpl.ConfigureMMap.
+func (fd *directoryFD) ConfigureMMap(ctx context.Context, opts *memmap.MMapOpts) error {
 	// mmap(2) specifies that EACCESS should be returned for non-regular file fds.
 	return syserror.EACCES
 }

pkg/sentry/fsimpl/ext/file_description.go

@@ -43,9 +43,6 @@ func (fd *fileDescription) inode() *inode {
 	return fd.vfsfd.VirtualDentry().Dentry().Impl().(*dentry).inode
 }
 
-// OnClose implements vfs.FileDescriptionImpl.OnClose.
-func (fd *fileDescription) OnClose() error { return nil }
-
 // StatusFlags implements vfs.FileDescriptionImpl.StatusFlags.
 func (fd *fileDescription) StatusFlags(ctx context.Context) (uint32, error) {
 	return fd.flags, nil

pkg/sentry/fsimpl/ext/regular_file.go

@@ -152,8 +152,8 @@ func (fd *regularFileFD) Seek(ctx context.Context, offset int64, whence int32) (
 	return offset, nil
 }
 
-// IterDirents implements vfs.FileDescriptionImpl.IterDirents.
-func (fd *regularFileFD) ConfigureMMap(ctx context.Context, opts memmap.MMapOpts) error {
+// ConfigureMMap implements vfs.FileDescriptionImpl.ConfigureMMap.
+func (fd *regularFileFD) ConfigureMMap(ctx context.Context, opts *memmap.MMapOpts) error {
 	// TODO(b/134676337): Implement mmap(2).
 	return syserror.ENODEV
 }

pkg/sentry/fsimpl/ext/symlink.go

@@ -105,7 +105,7 @@ func (fd *symlinkFD) Seek(ctx context.Context, offset int64, whence int32) (int6
 	return 0, syserror.EBADF
 }
 
-// IterDirents implements vfs.FileDescriptionImpl.IterDirents.
-func (fd *symlinkFD) ConfigureMMap(ctx context.Context, opts memmap.MMapOpts) error {
+// ConfigureMMap implements vfs.FileDescriptionImpl.ConfigureMMap.
+func (fd *symlinkFD) ConfigureMMap(ctx context.Context, opts *memmap.MMapOpts) error {
 	return syserror.EBADF
 }

pkg/sentry/vfs/file_description.go

@@ -102,7 +102,7 @@ type FileDescriptionImpl interface {
 	// OnClose is called when a file descriptor representing the
 	// FileDescription is closed. Note that returning a non-nil error does not
 	// prevent the file descriptor from being closed.
-	OnClose() error
+	OnClose(ctx context.Context) error
 
 	// StatusFlags returns file description status flags, as for
 	// fcntl(F_GETFL).
@@ -180,7 +180,7 @@ type FileDescriptionImpl interface {
 	// ConfigureMMap mutates opts to implement mmap(2) for the file. Most
 	// implementations that support memory mapping can call
 	// GenericConfigureMMap with the appropriate memmap.Mappable.
-	ConfigureMMap(ctx context.Context, opts memmap.MMapOpts) error
+	ConfigureMMap(ctx context.Context, opts *memmap.MMapOpts) error
 
 	// Ioctl implements the ioctl(2) syscall.
 	Ioctl(ctx context.Context, uio usermem.IO, args arch.SyscallArguments) (uintptr, error)

pkg/sentry/vfs/file_description_impl_util.go

@@ -45,7 +45,7 @@ type FileDescriptionDefaultImpl struct{}
 
 // OnClose implements FileDescriptionImpl.OnClose analogously to
 // file_operations::flush == NULL in Linux.
-func (FileDescriptionDefaultImpl) OnClose() error {
+func (FileDescriptionDefaultImpl) OnClose(ctx context.Context) error {
 	return nil
 }
 
@@ -117,7 +117,7 @@ func (FileDescriptionDefaultImpl) Sync(ctx context.Context) error {
 
 // ConfigureMMap implements FileDescriptionImpl.ConfigureMMap analogously to
 // file_operations::mmap == NULL in Linux.
-func (FileDescriptionDefaultImpl) ConfigureMMap(ctx context.Context, opts memmap.MMapOpts) error {
+func (FileDescriptionDefaultImpl) ConfigureMMap(ctx context.Context, opts *memmap.MMapOpts) error {
 	return syserror.ENODEV
 }