f2fs: only set release for file that has compressed data

If a file is not comprssed yet or does not have compressed data,
for example, its data has a very low compression ratio, do not
set FI_COMPRESS_RELEASED flag.

Signed-off-by: Sheng Yong <shengyong@oppo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index b1a4de3..0f54c1f 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3510,13 +3510,15 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg)
        if (ret)
                goto out;
 
+       if (!atomic_read(&F2FS_I(inode)->i_compr_blocks)) {
+               ret = -EPERM;
+               goto out;
+       }
+
        set_inode_flag(inode, FI_COMPRESS_RELEASED);
        inode->i_ctime = current_time(inode);
        f2fs_mark_inode_dirty_sync(inode, true);
 
-       if (!atomic_read(&F2FS_I(inode)->i_compr_blocks))
-               goto out;
-
        f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
        filemap_invalidate_lock(inode->i_mapping);