From patchwork Fri Sep 4 20:16:58 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Schumaker, Anna" X-Patchwork-Id: 7126271 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D55C7BEEC1 for ; Fri, 4 Sep 2015 20:28:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 13968208A2 for ; Fri, 4 Sep 2015 20:28:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2568B208A9 for ; Fri, 4 Sep 2015 20:28:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760158AbbIDU2b (ORCPT ); Fri, 4 Sep 2015 16:28:31 -0400 Received: from mx142.netapp.com ([216.240.21.19]:28032 "EHLO mx142.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759978AbbIDU2a (ORCPT ); Fri, 4 Sep 2015 16:28:30 -0400 X-IronPort-AV: E=Sophos;i="5.17,470,1437462000"; d="scan'208";a="63671527" Received: from vmwexchts03-prd.hq.netapp.com ([10.122.105.31]) by mx142-out.netapp.com with ESMTP; 04 Sep 2015 13:17:14 -0700 Received: from smtp2.corp.netapp.com (10.57.159.114) by VMWEXCHTS03-PRD.hq.netapp.com (10.122.105.31) with Microsoft SMTP Server id 15.0.1076.9; Fri, 4 Sep 2015 13:17:14 -0700 Received: from davros.com ([10.63.224.137]) by smtp2.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id t84KH4kq024651; Fri, 4 Sep 2015 13:17:12 -0700 (PDT) From: Anna Schumaker To: , , , , , , , , , , Subject: [PATCH v1 4/8] btrfs: Add mountpoint checking during btrfs_copy_file_range Date: Fri, 4 Sep 2015 16:16:58 -0400 Message-ID: <1441397823-1203-5-git-send-email-Anna.Schumaker@Netapp.com> X-Mailer: git-send-email 2.5.1 In-Reply-To: <1441397823-1203-1-git-send-email-Anna.Schumaker@Netapp.com> References: <1441397823-1203-1-git-send-email-Anna.Schumaker@Netapp.com> MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We need to verify that both the source and the destination files are part of the same filesystem, otherwise we can't create a reflink. Signed-off-by: Anna Schumaker --- fs/btrfs/ioctl.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 62ae286..9c0c955 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3856,6 +3856,10 @@ ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, { ssize_t ret; + if (inode_in->i_sb != inode_out->i_sb || + file_in->f_path.mnt != file_out->f_path.mnt) + return -EXDEV; + ret = btrfs_clone_files(file_out, file_in, pos_in, len, pos_out); if (ret == 0) ret = len;