f2fs: compress: relocate some judgments in f2fs_reserve_compress_blocks

The following f2fs_io test will get a "0" result instead of -EINVAL,
unisoc # ./f2fs_io compress file
unisoc # ./f2fs_io reserve_cblocks file
 0
it's not reasonable, so the judgement of
atomic_read(&F2FS_I(inode)->i_compr_blocks) should be placed after
the judgement of is_inode_flag_set(inode, FI_COMPRESS_RELEASED).

Fixes: c75488fb4d82 ("f2fs: introduce F2FS_IOC_RESERVE_COMPRESS_BLOCKS")
Signed-off-by: Xiuhong Wang <xiuhong.wang@unisoc.com>
Signed-off-by: Zhiguo Niu <zhiguo.niu@unisoc.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 4ca6c693b33a507936df6ac49960309b647b87c9..74c5e48fce2229d2d6b239f7eae41873de3b7041 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3720,9 +3720,6 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)
        if (ret)
                return ret;
 
-       if (atomic_read(&F2FS_I(inode)->i_compr_blocks))
-               goto out;
-
        f2fs_balance_fs(sbi, true);
 
        inode_lock(inode);
@@ -3732,6 +3729,9 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)
                goto unlock_inode;
        }
 
+       if (atomic_read(&F2FS_I(inode)->i_compr_blocks))
+               goto unlock_inode;
+
        f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
        filemap_invalidate_lock(inode->i_mapping);
 
@@ -3778,7 +3778,6 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)
        }
 unlock_inode:
        inode_unlock(inode);
-out:
        mnt_drop_write_file(filp);
 
        if (ret >= 0) {