ocfs2: Hold ip_lock when set/clear flags for indexed dir.

When we set/clear the dyn_features for an inode we hold the ip_lock.
So do it when we set/clear OCFS2_INDEXED_DIR_FL also.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index c49f6de0e7ab..d417b3f9b0c7 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -2461,8 +2461,10 @@ static int ocfs2_dx_dir_attach_index(struct ocfs2_super *osb,
 
         di->i_dx_root = cpu_to_le64(dr_blkno);
 
+        spin_lock(&OCFS2_I(dir)->ip_lock);
         OCFS2_I(dir)->ip_dyn_features |= OCFS2_INDEXED_DIR_FL;
         di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features);
+        spin_unlock(&OCFS2_I(dir)->ip_lock);
 
         ocfs2_journal_dirty(handle, di_bh);
 
@@ -4466,8 +4468,10 @@ static int ocfs2_dx_dir_remove_index(struct inode *dir,
                 goto out_commit;
         }
 
+        spin_lock(&OCFS2_I(dir)->ip_lock);
         OCFS2_I(dir)->ip_dyn_features &= ~OCFS2_INDEXED_DIR_FL;
         di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features);
+        spin_unlock(&OCFS2_I(dir)->ip_lock);
         di->i_dx_root = cpu_to_le64(0ULL);
 
         ocfs2_journal_dirty(handle, di_bh);