From patchwork Wed Oct 10 00:14:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 10633769 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0887516B1 for ; Wed, 10 Oct 2018 00:15:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EB54F28ED7 for ; Wed, 10 Oct 2018 00:15:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DFB6228FA5; Wed, 10 Oct 2018 00:15:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from userp2120.oracle.com (userp2120.oracle.com [156.151.31.85]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7E15A28ED7 for ; Wed, 10 Oct 2018 00:15:11 +0000 (UTC) Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w9A0E7ln086640; Wed, 10 Oct 2018 00:14:57 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : date : message-id : in-reply-to : references : mime-version : cc : subject : list-id : list-unsubscribe : list-archive : list-post : list-help : list-subscribe : content-type : content-transfer-encoding : sender; s=corp-2018-07-02; bh=L97tiXxwrHR+a32Ig0gwqLxGsCRQ+yHDA7UpmF1bh6o=; b=5QWd3AxPhn11wtsyi6UQzFcfR7xdOiq0NaImT7z2FCWBgetaQWAQ4IyIW2nlAhN3F/Py I9A20FhzTLJFGeVoOrB77fI0nZD5P6n8lCyE6vgDfu36yoENJjWoDn8xz2YCXLMzUhf3 mHp4mhBIyDcRy75no95KigbuKML5/Qp+fY0UopPpLI2Hm2x07K2N+6rOx6ZkX51fk+Dz S6XuHXzjiGh+DFwjSjfngDJEcSYCIKRfPr2LzfBb6sqxByQj1THy6QBdTfeH4378fjA9 fO20dHJ37MHn2iWwx/TqfLtJfPS138gdJa7UU/50lNrm9reVlu+sQBEx4nIYWYJQ3wFF 6Q== Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by userp2120.oracle.com with ESMTP id 2mxnpr0pba-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 10 Oct 2018 00:14:57 +0000 Received: from oss.oracle.com (oss-old-reserved.oracle.com [137.254.22.2]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w9A0Eu9o000451 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 10 Oct 2018 00:14:56 GMT Received: from localhost ([127.0.0.1] helo=lb-oss.oracle.com) by oss.oracle.com with esmtp (Exim 4.63) (envelope-from ) id 1gA29Q-0003a5-Lc; Tue, 09 Oct 2018 17:14:56 -0700 Received: from userv0021.oracle.com ([156.151.31.71]) by oss.oracle.com with esmtp (Exim 4.63) (envelope-from ) id 1gA29O-0003ZB-LL for ocfs2-devel@oss.oracle.com; Tue, 09 Oct 2018 17:14:54 -0700 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w9A0Es5e006907 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 10 Oct 2018 00:14:54 GMT Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w9A0ErHZ004470; Wed, 10 Oct 2018 00:14:53 GMT Received: from localhost (/10.159.249.114) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 10 Oct 2018 00:14:53 +0000 From: "Darrick J. Wong" To: david@fromorbit.com, darrick.wong@oracle.com Date: Tue, 09 Oct 2018 17:14:52 -0700 Message-ID: <153913049195.32295.13614911442275409372.stgit@magnolia> In-Reply-To: <153913023835.32295.13962696655740190941.stgit@magnolia> References: <153913023835.32295.13962696655740190941.stgit@magnolia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Cc: sandeen@redhat.com, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, ocfs2-devel@oss.oracle.com, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org Subject: [Ocfs2-devel] [PATCH 25/25] xfs: support returning partial reflink results X-BeenThere: ocfs2-devel@oss.oracle.com X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: ocfs2-devel-bounces@oss.oracle.com Errors-To: ocfs2-devel-bounces@oss.oracle.com X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9041 signatures=668706 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810100001 X-Virus-Scanned: ClamAV using ClamSMTP From: Darrick J. Wong Back when the XFS reflink code only supported clone_file_range, we were only able to return zero or negative error codes to userspace. However, now that copy_file_range (which returns bytes copied) can use XFS' clone_file_range, we have the opportunity to return partial results. For example, if userspace sends a 1GB clone request and we run out of space halfway through, we at least can tell userspace that we completed 512M of that request like a regular write. Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_file.c | 7 ++----- fs/xfs/xfs_reflink.c | 19 ++++++++++++++----- fs/xfs/xfs_reflink.h | 2 +- 3 files changed, 17 insertions(+), 11 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 6f4205846451..a15057be1994 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -928,11 +928,8 @@ xfs_file_remap_range( loff_t len, unsigned int flags) { - int ret; - - ret = xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, - len, false); - return ret < 0 ? ret : len; + return xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, + len, flags); } STATIC int diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index 0f4678920240..b33107a35330 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -1123,6 +1123,7 @@ xfs_reflink_remap_blocks( struct xfs_inode *dest, xfs_fileoff_t destoff, xfs_filblks_t len, + xfs_filblks_t *remapped, xfs_off_t new_isize) { struct xfs_bmbt_irec imap; @@ -1130,6 +1131,7 @@ xfs_reflink_remap_blocks( int error = 0; xfs_filblks_t range_len; + *remapped = 0; /* drange = (destoff, destoff + len); srange = (srcoff, srcoff + len) */ while (len) { uint lock_mode; @@ -1168,6 +1170,7 @@ xfs_reflink_remap_blocks( srcoff += range_len; destoff += range_len; len -= range_len; + *remapped += range_len; } return 0; @@ -1349,7 +1352,7 @@ xfs_reflink_remap_prep( /* * Link a range of blocks from one file to another. */ -int +loff_t xfs_reflink_remap_range( struct file *file_in, loff_t pos_in, @@ -1364,9 +1367,9 @@ xfs_reflink_remap_range( struct xfs_inode *dest = XFS_I(inode_out); struct xfs_mount *mp = src->i_mount; xfs_fileoff_t sfsbno, dfsbno; - xfs_filblks_t fsblen; + xfs_filblks_t fsblen, remapped = 0; xfs_extlen_t cowextsize; - ssize_t ret; + int ret; if (!xfs_sb_version_hasreflink(&mp->m_sb)) return -EOPNOTSUPP; @@ -1382,11 +1385,17 @@ xfs_reflink_remap_range( trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out); + if (len == 0) { + ret = 0; + goto out_unlock; + } + dfsbno = XFS_B_TO_FSBT(mp, pos_out); sfsbno = XFS_B_TO_FSBT(mp, pos_in); fsblen = XFS_B_TO_FSB(mp, len); ret = xfs_reflink_remap_blocks(src, sfsbno, dest, dfsbno, fsblen, - pos_out + len); + &remapped, pos_out + len); + remapped = min_t(int64_t, len, XFS_FSB_TO_B(mp, remapped)); if (ret) goto out_unlock; @@ -1409,7 +1418,7 @@ xfs_reflink_remap_range( xfs_reflink_remap_unlock(file_in, file_out); if (ret) trace_xfs_reflink_remap_range_error(dest, ret, _RET_IP_); - return ret; + return remapped > 0 ? remapped : ret; } /* diff --git a/fs/xfs/xfs_reflink.h b/fs/xfs/xfs_reflink.h index c3c46c276fe1..cbc26ff79a8f 100644 --- a/fs/xfs/xfs_reflink.h +++ b/fs/xfs/xfs_reflink.h @@ -27,7 +27,7 @@ extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset, extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset, xfs_off_t count); extern int xfs_reflink_recover_cow(struct xfs_mount *mp); -extern int xfs_reflink_remap_range(struct file *file_in, loff_t pos_in, +extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, loff_t len, unsigned int remap_flags); extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,