From patchwork Thu Nov 12 07:14:26 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: TARUISI Hiroaki X-Patchwork-Id: 59519 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nAC7ERcW028658 for ; Thu, 12 Nov 2009 07:14:27 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751103AbZKLHOT (ORCPT ); Thu, 12 Nov 2009 02:14:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751126AbZKLHOT (ORCPT ); Thu, 12 Nov 2009 02:14:19 -0500 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:46806 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751103AbZKLHOS (ORCPT ); Thu, 12 Nov 2009 02:14:18 -0500 Received: from m4.gw.fujitsu.co.jp ([10.0.50.74]) by fgwmail5.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id nAC7ENuY017797 for (envelope-from taruishi.hiroak@jp.fujitsu.com); Thu, 12 Nov 2009 16:14:23 +0900 Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 08E4345DE4D for ; Thu, 12 Nov 2009 16:14:23 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id DF59745DE6E for ; Thu, 12 Nov 2009 16:14:22 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id C8AD51DB8037 for ; Thu, 12 Nov 2009 16:14:22 +0900 (JST) Received: from m022.s.css.fujitsu.com (m022.s.css.fujitsu.com [10.0.81.62]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 7F6F21DB803F for ; Thu, 12 Nov 2009 16:14:19 +0900 (JST) Received: from m022.css.fujitsu.com (m022 [127.0.0.1]) by m022.s.css.fujitsu.com (Postfix) with ESMTP id 6D9FD480001; Thu, 12 Nov 2009 16:14:19 +0900 (JST) Received: from [127.0.0.1] (unknown [10.124.100.186]) by m022.s.css.fujitsu.com (Postfix) with ESMTP id 4E68F18061; Thu, 12 Nov 2009 16:14:19 +0900 (JST) X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.4.0 Received: from paxd3.soft.fujitsu.com[10.124.100.186] by paxd3.soft.fujitsu.com (FujitsuOutboundMailChecker v1.4.0/9992[10.124.100.186]); Thu, 12 Nov 2009 16:14:31 +0900 (JST) Message-ID: <4AFBB5D2.3060405@jp.fujitsu.com> Date: Thu, 12 Nov 2009 16:14:26 +0900 From: TARUISI Hiroaki User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: linux-btrfs@vger.kernel.org CC: chris.mason@oracle.com Subject: [PATCH] Deny sys_link across subvolumes. References: <4AEA7A07.4020006@jp.fujitsu.com> In-Reply-To: <4AEA7A07.4020006@jp.fujitsu.com> X-Enigmail-Version: 0.95.7 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 78139ef..c7f66e4 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4284,6 +4284,10 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, if (inode->i_nlink == 0) return -ENOENT; + /* do not allow sys_link's with other subvols of the same device */ + if (root->objectid != BTRFS_I(inode)->root->objectid) + return -EPERM; + /* * 1 item for inode ref * 2 items for dir items