Commit 5fed0be8 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: do not allow partial truncation on pinned file 



If the pinned file has a hole by partial truncation, application that has
the block map will be broken.

Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 2b642898

fs/f2fs/file.c

+5 −1
Original line number Diff line number Diff line
@@ -1750,7 +1750,11 @@ static long f2fs_fallocate(struct file *file, int mode, 
		(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))

		return -EOPNOTSUPP;



	if (f2fs_compressed_file(inode) &&

	/*

	 * Pinned file should not support partial trucation since the block

	 * can be used by applications.

	 */

	if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) &&

		(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |

			FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE)))

		return -EOPNOTSUPP;