From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ipmailnode02.adl6.internode.on.net ([150.101.137.148]:60959 "EHLO ipmailnode02.adl6.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725937AbeLCIee (ORCPT ); Mon, 3 Dec 2018 03:34:34 -0500 From: Dave Chinner Subject: [PATCH 11/11] ovl: allow cross-device copy_file_range calls Date: Mon, 3 Dec 2018 19:34:16 +1100 Message-Id: <20181203083416.28978-12-david@fromorbit.com> In-Reply-To: <20181203083416.28978-1-david@fromorbit.com> References: <20181203083416.28978-1-david@fromorbit.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-unionfs-owner@vger.kernel.org To: linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org Cc: olga.kornievskaia@gmail.com, linux-nfs@vger.kernel.org, linux-unionfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-cifs@vger.kernel.org List-ID: From: Dave Chinner Restrictions on cross-device copy_file_range() only affect the vfs_copy_file_range() call to the lower filesystems. They will handle the copy appropriately, so OVL will never see a EXDEV error from them. Hence we can remove the EXDEV checks and error handling from the ovl_copy_file_range() implementation. Signed-off-by: Dave Chinner --- fs/overlayfs/file.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index 34fb0398d016..146901d204df 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -443,14 +443,6 @@ static loff_t ovl_copyfile(struct file *file_in, loff_t pos_in, const struct cred *old_cred; loff_t ret; - /* - * Temporary. Cross device copy checks should be left to the copy file - * call on the real inodes, but existing behaviour checks the upper - * files only. - */ - if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb) - return -EXDEV; - ret = ovl_real_fdget(file_out, &real_out); if (ret) return ret; @@ -499,7 +491,8 @@ static ssize_t ovl_copy_file_range(struct file *file_in, loff_t pos_in, ret = ovl_copyfile(file_in, pos_in, file_out, pos_out, len, flags, OVL_COPY); - if (ret == -EOPNOTSUPP || ret == -EXDEV) + WARN_ON_ONCE(ret == -EXDEV); + if (ret == -EOPNOTSUPP) ret = generic_copy_file_range(file_in, pos_in, file_out, pos_out, len, flags); return ret; -- 2.19.1