Compresse file and normal file has differ in i_addr addressing, specifically addrs per inode/block. So, we will face data loss, if we disable the compression flag on non-empty files. Therefore we should disallow not only enabling but disabling the compression flag on non-empty files.
Signed-off-by: Sungjong Seo <[email protected]> Signed-off-by: Hyeong-Jun Kim <[email protected]> --- fs/f2fs/f2fs.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index b8e8f8c716b0..19146c834abd 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -4177,8 +4177,7 @@ static inline bool f2fs_disable_compressed_file(struct inode *inode) if (!f2fs_compressed_file(inode)) return true; - if (S_ISREG(inode->i_mode) && - (get_dirty_pages(inode) || atomic_read(&fi->i_compr_blocks))) + if (S_ISREG(inode->i_mode) && inode->i_size) return false; fi->i_flags &= ~F2FS_COMPR_FL; -- 2.25.1 _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
