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-rw-r--r--fs/ceph/mds_client.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 377ac34ddbb3..7c2eb28c24f6 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1800,13 +1800,18 @@ static int build_dentry_path(struct dentry *dentry,
int *pfreepath)
{
char *path;
+ struct inode *dir;
- if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_NOSNAP) {
- *pino = ceph_ino(d_inode(dentry->d_parent));
+ rcu_read_lock();
+ dir = d_inode_rcu(dentry->d_parent);
+ if (dir && ceph_snap(dir) == CEPH_NOSNAP) {
+ *pino = ceph_ino(dir);
+ rcu_read_unlock();
*ppath = dentry->d_name.name;
*ppathlen = dentry->d_name.len;
return 0;
}
+ rcu_read_unlock();
path = ceph_mdsc_build_path(dentry, ppathlen, pino, 1);
if (IS_ERR(path))
return PTR_ERR(path);