diff options
Diffstat (limited to 'fs/nilfs2/super.c')
| -rw-r--r-- | fs/nilfs2/super.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index a76d6ea51ffb..6522cac6057c 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -945,6 +945,8 @@ static int nilfs_attach_snapshot(struct super_block *s, __u64 cno, struct nilfs_root *root; int ret; + mutex_lock(&nilfs->ns_snapshot_mount_mutex); + down_read(&nilfs->ns_segctor_sem); ret = nilfs_cpfile_is_snapshot(nilfs->ns_cpfile, cno); up_read(&nilfs->ns_segctor_sem); @@ -969,6 +971,7 @@ static int nilfs_attach_snapshot(struct super_block *s, __u64 cno, ret = nilfs_get_root_dentry(s, root, root_dentry); nilfs_put_root(root); out: + mutex_unlock(&nilfs->ns_snapshot_mount_mutex); return ret; } |