Return-Path: Received: from mx142.netapp.com ([216.240.21.19]:52316 "EHLO mx142.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760608AbbIDUR0 (ORCPT ); Fri, 4 Sep 2015 16:17:26 -0400 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> 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 Content-Type: text/plain Sender: linux-nfs-owner@vger.kernel.org List-ID: 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; -- 2.5.1