From patchwork Sun Oct 21 16:17:57 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: 10651267 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 E73AA174E for ; Sun, 21 Oct 2018 16:18:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D7D79287B7 for ; Sun, 21 Oct 2018 16:18:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CBDEE287BE; Sun, 21 Oct 2018 16:18:16 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6C0C2287C6 for ; Sun, 21 Oct 2018 16:18:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728122AbeJVAdD (ORCPT ); Sun, 21 Oct 2018 20:33:03 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:43170 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728077AbeJVAdB (ORCPT ); Sun, 21 Oct 2018 20:33:01 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w9LGEMks155132; Sun, 21 Oct 2018 16:18:05 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : from : to : cc : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=jBhmb/N7l//SEdkHcVUE3iIqA8iaNxSFon2zX2S1w8g=; b=rFr3O4uUYl5F957T+le4lmrP2or8osZt8RblSUTrVCcXiX1cYVK10JKixDPDfftzv6lB Q6NokYaIYMmqRHrHxlL4RKVQP4kMCwTI4lOFemGVdb2pGN8mMVuVLxb6kDxkZy+3La2i 7OTI4cY7zI+oncaChJfyIzAmXaPIvMoR2WVXjUei134KgMeJd5PAAeF1zsqkiqVrZs0W 7tzB7WdOpc0NvpOCCYGdscvhHNb/JGoz7+AKF/LqAmO9LfcwP9ecprvMqsnzA9Y8p+Iy 9gfHJyUMGfcWZIH0QIR/+o0WItl8H9/RHep7/2IIAI7UHwNuCEZda8HuG+TEc4yiqSmj vA== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by aserp2120.oracle.com with ESMTP id 2n7vapjysm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 21 Oct 2018 16:18:05 +0000 Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w9LGHxPG007062 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 21 Oct 2018 16:17:59 GMT Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w9LGHxSA024891; Sun, 21 Oct 2018 16:17:59 GMT Received: from localhost (/10.159.225.70) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sun, 21 Oct 2018 09:17:58 -0700 Subject: [PATCH 25/28] xfs: support returning partial reflink results From: "Darrick J. Wong" To: david@fromorbit.com, darrick.wong@oracle.com 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, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, ocfs2-devel@oss.oracle.com Date: Sun, 21 Oct 2018 09:17:57 -0700 Message-ID: <154013867727.29026.14417615066515846065.stgit@magnolia> In-Reply-To: <154013850285.29026.16168387526580596209.stgit@magnolia> References: <154013850285.29026.16168387526580596209.stgit@magnolia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9053 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=856 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810210151 Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org 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 Reviewed-by: Dave Chinner --- fs/xfs/xfs_file.c | 5 +---- fs/xfs/xfs_reflink.c | 17 ++++++++++++----- fs/xfs/xfs_reflink.h | 2 +- 3 files changed, 14 insertions(+), 10 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 38fde4e11714..7d42ab8fe6e1 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -928,14 +928,11 @@ xfs_file_remap_range( loff_t len, unsigned int remap_flags) { - int ret; - if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY)) return -EINVAL; - ret = xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, + return xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out, len, remap_flags); - return ret < 0 ? ret : len; } STATIC int diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index 79dec457f7fb..4abb2aea8f31 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -1122,13 +1122,15 @@ xfs_reflink_remap_blocks( loff_t pos_in, struct xfs_inode *dest, loff_t pos_out, - loff_t remap_len) + loff_t remap_len, + loff_t *remapped) { struct xfs_bmbt_irec imap; xfs_fileoff_t srcoff; xfs_fileoff_t destoff; xfs_filblks_t len; xfs_filblks_t range_len; + xfs_filblks_t remapped_len = 0; xfs_off_t new_isize = pos_out + remap_len; int nimaps; int error = 0; @@ -1175,10 +1177,13 @@ xfs_reflink_remap_blocks( srcoff += range_len; destoff += range_len; len -= range_len; + remapped_len += range_len; } if (error) trace_xfs_reflink_remap_blocks_error(dest, error, _RET_IP_); + *remapped = min_t(loff_t, remap_len, + XFS_FSB_TO_B(src->i_mount, remapped_len)); return error; } @@ -1387,7 +1392,7 @@ 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, @@ -1401,8 +1406,9 @@ xfs_reflink_remap_range( struct inode *inode_out = file_inode(file_out); struct xfs_inode *dest = XFS_I(inode_out); struct xfs_mount *mp = src->i_mount; + loff_t remapped = 0; xfs_extlen_t cowextsize; - ssize_t ret; + int ret; if (!xfs_sb_version_hasreflink(&mp->m_sb)) return -EOPNOTSUPP; @@ -1418,7 +1424,8 @@ xfs_reflink_remap_range( trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out); - ret = xfs_reflink_remap_blocks(src, pos_in, dest, pos_out, len); + ret = xfs_reflink_remap_blocks(src, pos_in, dest, pos_out, len, + &remapped); if (ret) goto out_unlock; @@ -1441,7 +1448,7 @@ 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,