f2fs: relocate inode_{,un}lock in F2FS_IOC_SETFLAGS

This patch expands cover region of inode->i_rwsem to keep setting flag
atomically.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index cdbf1add2a11..abb0403d3414 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1473,10 +1473,10 @@ static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
         if (ret)
                 return ret;
 
-        flags = f2fs_mask_flags(inode->i_mode, flags);
-
         inode_lock(inode);
 
+        flags = f2fs_mask_flags(inode->i_mode, flags);
+
         oldflags = fi->i_flags;
 
         if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
@@ -1490,10 +1490,11 @@ static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
         flags = flags & FS_FL_USER_MODIFIABLE;
         flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
         fi->i_flags = flags;
-        inode_unlock(inode);
 
         inode->i_ctime = current_time(inode);
         f2fs_set_inode_flags(inode);
+
+        inode_unlock(inode);
 out:
         mnt_drop_write_file(filp);
         return ret;