NFS: Ensure nfs_instantiate() invalidates the parent dir on error

Also ensure that it drops the dentry in this case.

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

1 files changed, 15 insertions, 8 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index e275a6eb0a7..82395c51171 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1174,32 +1174,39 @@ out_renew:
 int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle,
                                 struct nfs_fattr *fattr)
 {
+        struct dentry *parent = dget_parent(dentry);
+        struct inode *dir = parent->d_inode;
         struct inode *inode;
         int error = -EACCES;
 
+        d_drop(dentry);
+
         /* We may have been initialized further down */
         if (dentry->d_inode)
-                return 0;
+                goto out;
         if (fhandle->size == 0) {
-                struct inode *dir = dentry->d_parent->d_inode;
                 error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);
                 if (error)
-                        return error;
+                        goto out_error;
         }
         if (!(fattr->valid & NFS_ATTR_FATTR)) {
                 struct nfs_server *server = NFS_SB(dentry->d_sb);
                 error = server->nfs_client->rpc_ops->getattr(server, fhandle, fattr);
                 if (error < 0)
-                        return error;
+                        goto out_error;
         }
         inode = nfs_fhget(dentry->d_sb, fhandle, fattr);
         error = PTR_ERR(inode);
         if (IS_ERR(inode))
-                return error;
-        d_instantiate(dentry, inode);
-        if (d_unhashed(dentry))
-                d_rehash(dentry);
+                goto out_error;
+        d_add(dentry, inode);
+out:
+        dput(parent);
         return 0;
+out_error:
+        nfs_mark_for_revalidate(dir);
+        dput(parent);
+        return error;
 }
 
 /*