NFS: nfs_lookup_revalidate should not trust an inode with i_nlink == 0

If the inode has no links, then we should force a new lookup.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index a46a74654488..d8e58ed3d45c 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -978,10 +978,11 @@ static int nfs_is_exclusive_create(struct inode *dir, unsigned int flags)
  * particular file and the "nocto" mount flag is not set.
  *
  */
-static inline
+static
 int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
 {
         struct nfs_server *server = NFS_SERVER(inode);
+        int ret;
 
         if (IS_AUTOMOUNT(inode))
                 return 0;
@@ -992,9 +993,13 @@ int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
         if ((flags & LOOKUP_OPEN) && !(server->flags & NFS_MOUNT_NOCTO) &&
             (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
                 goto out_force;
-        return 0;
+out:
+        return (inode->i_nlink == 0) ? -ENOENT : 0;
 out_force:
-        return __nfs_revalidate_inode(server, inode);
+        ret = __nfs_revalidate_inode(server, inode);
+        if (ret != 0)
+                return ret;
+        goto out;
 }
 
 /*