[PATCH v2 2/2] f2fs: move the conditional statement after holding the inode lock in f2fs_fallocate()

[Yangtao Li]

For judging the inode flag state, the inode lock must be held.

Cc: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Fixes: fcc85a4d86b5 ("f2fs crypto: activate encryption support for fs APIs")
Signed-off-by: Yangtao Li <frank.li@xxxxxxxx>
---
v2:
-add unlock
 fs/f2fs/file.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 42a9b683118c..0dbbcb406d3f 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1801,9 +1801,18 @@ static long f2fs_fallocate(struct file *file, int mode,
 	if (!S_ISREG(inode->i_mode))
 		return -EINVAL;
 
+	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
+			FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
+			FALLOC_FL_INSERT_RANGE))
+		return -EOPNOTSUPP;
+
+	inode_lock(inode);
+
 	if (IS_ENCRYPTED(inode) &&
-		(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
+		(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) {
+		inode_unlock(inode);
 		return -EOPNOTSUPP;
+	}
 
 	/*
 	 * Pinned file should not support partial truncation since the block
@@ -1811,15 +1820,10 @@ static long f2fs_fallocate(struct file *file, int mode,
 	 */
 	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;
-
-	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
-			FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
-			FALLOC_FL_INSERT_RANGE))
+			FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE))) {
+		inode_unlock(inode);
 		return -EOPNOTSUPP;
-
-	inode_lock(inode);
+	}
 
 	ret = file_modified(file);
 	if (ret)
-- 
2.39.0