NFSv4: link must update the inode nlink.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

fs/nfs/dir.c

@@ -1711,7 +1711,7 @@ static void nfs_drop_nlink(struct inode *inode)
 	NFS_I(inode)->attr_gencount = nfs_inc_attr_generation_counter();
 	nfs_set_cache_invalid(
 		inode, NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME |
-			       NFS_INO_INVALID_NLINK | NFS_INO_REVAL_FORCED);
+			       NFS_INO_INVALID_NLINK);
 	spin_unlock(&inode->i_lock);
 }
 

fs/nfs/nfs4proc.c

@@ -1175,6 +1175,14 @@ nfs4_inc_nlink_locked(struct inode *inode)
 	inc_nlink(inode);
 }
 
+static void
+nfs4_inc_nlink(struct inode *inode)
+{
+	spin_lock(&inode->i_lock);
+	nfs4_inc_nlink_locked(inode);
+	spin_unlock(&inode->i_lock);
+}
+
 static void
 nfs4_dec_nlink_locked(struct inode *inode)
 {
@@ -4791,6 +4799,7 @@ static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct
 	if (!status) {
 		nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start,
 				       NFS_INO_INVALID_DATA);
+		nfs4_inc_nlink(inode);
 		status = nfs_post_op_update_inode(inode, res.fattr);
 		if (!status)
 			nfs_setsecurity(inode, res.fattr, res.label);