From patchwork Fri Feb 26 00:20:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiyang Ruan X-Patchwork-Id: 12105321 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B83ACC433E9 for ; Fri, 26 Feb 2021 00:29:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9413A64F22 for ; Fri, 26 Feb 2021 00:29:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233396AbhBZA3H (ORCPT ); Thu, 25 Feb 2021 19:29:07 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:8517 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S233313AbhBZA27 (ORCPT ); Thu, 25 Feb 2021 19:28:59 -0500 X-IronPort-AV: E=Sophos;i="5.81,207,1610380800"; d="scan'208";a="104882847" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 26 Feb 2021 08:21:36 +0800 Received: from G08CNEXMBPEKD04.g08.fujitsu.local (unknown [10.167.33.201]) by cn.fujitsu.com (Postfix) with ESMTP id 359364CE6D8A; Fri, 26 Feb 2021 08:21:31 +0800 (CST) Received: from G08CNEXCHPEKD04.g08.fujitsu.local (10.167.33.200) by G08CNEXMBPEKD04.g08.fujitsu.local (10.167.33.201) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 26 Feb 2021 08:21:31 +0800 Received: from irides.mr.mr.mr (10.167.225.141) by G08CNEXCHPEKD04.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 26 Feb 2021 08:21:31 +0800 From: Shiyang Ruan To: , , , CC: , , , , , , , , , Subject: [PATCH v2 09/10] fs/xfs: Handle CoW for fsdax write() path Date: Fri, 26 Feb 2021 08:20:29 +0800 Message-ID: <20210226002030.653855-10-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210226002030.653855-1-ruansy.fnst@fujitsu.com> References: <20210226002030.653855-1-ruansy.fnst@fujitsu.com> MIME-Version: 1.0 X-yoursite-MailScanner-ID: 359364CE6D8A.A44C2 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@fujitsu.com Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org In fsdax mode, WRITE and ZERO on a shared extent need CoW performed. After CoW, new allocated extents needs to be remapped to the file. So, add an iomap_end for dax write ops to do the remapping work. Signed-off-by: Shiyang Ruan --- fs/xfs/xfs_bmap_util.c | 3 ++- fs/xfs/xfs_file.c | 9 +++------ fs/xfs/xfs_iomap.c | 30 +++++++++++++++++++++++++++++- fs/xfs/xfs_iomap.h | 1 + fs/xfs/xfs_iops.c | 11 ++++++++--- fs/xfs/xfs_reflink.c | 2 ++ 6 files changed, 45 insertions(+), 11 deletions(-) diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index 7371a7f7c652..65a8782b6378 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -977,7 +977,8 @@ xfs_free_file_space( if (offset + len > XFS_ISIZE(ip)) len = XFS_ISIZE(ip) - offset; error = iomap_zero_range(VFS_I(ip), offset, len, NULL, - &xfs_buffered_write_iomap_ops); + IS_DAX(VFS_I(ip)) ? + &xfs_dax_write_iomap_ops : &xfs_buffered_write_iomap_ops); if (error) return error; diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 5b0f93f73837..1987d15eab61 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -623,11 +623,8 @@ xfs_file_dax_write( count = iov_iter_count(from); trace_xfs_file_dax_write(ip, count, pos); - ret = dax_iomap_rw(iocb, from, &xfs_direct_write_iomap_ops); - if (ret > 0 && iocb->ki_pos > i_size_read(inode)) { - i_size_write(inode, iocb->ki_pos); - error = xfs_setfilesize(ip, pos, ret); - } + ret = dax_iomap_rw(iocb, from, &xfs_dax_write_iomap_ops); + out: xfs_iunlock(ip, iolock); if (error) @@ -1250,7 +1247,7 @@ __xfs_filemap_fault( ret = dax_iomap_fault(vmf, pe_size, &pfn, NULL, (write_fault && !vmf->cow_page) ? - &xfs_direct_write_iomap_ops : + &xfs_dax_write_iomap_ops : &xfs_read_iomap_ops); if (ret & VM_FAULT_NEEDDSYNC) ret = dax_finish_sync_fault(vmf, pe_size, pfn); diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 7b9ff824e82d..23c6f8c97047 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -771,7 +771,8 @@ xfs_direct_write_iomap_begin( /* may drop and re-acquire the ilock */ error = xfs_reflink_allocate_cow(ip, &imap, &cmap, &shared, - &lockmode, flags & IOMAP_DIRECT); + &lockmode, + flags & IOMAP_DIRECT || IS_DAX(inode)); if (error) goto out_unlock; if (shared) @@ -850,6 +851,33 @@ const struct iomap_ops xfs_direct_write_iomap_ops = { .iomap_begin = xfs_direct_write_iomap_begin, }; +static int +xfs_dax_write_iomap_end( + struct inode *inode, + loff_t pos, + loff_t length, + ssize_t written, + unsigned int flags, + struct iomap *iomap) +{ + int error = 0; + xfs_inode_t *ip = XFS_I(inode); + + if (pos + written > i_size_read(inode)) { + i_size_write(inode, pos + written); + error = xfs_setfilesize(ip, pos, written); + } + if (xfs_is_cow_inode(ip)) + error = xfs_reflink_end_cow(ip, pos, written); + + return error; +} + +const struct iomap_ops xfs_dax_write_iomap_ops = { + .iomap_begin = xfs_direct_write_iomap_begin, + .iomap_end = xfs_dax_write_iomap_end, +}; + static int xfs_buffered_write_iomap_begin( struct inode *inode, diff --git a/fs/xfs/xfs_iomap.h b/fs/xfs/xfs_iomap.h index 7d3703556d0e..a361c2f27cf3 100644 --- a/fs/xfs/xfs_iomap.h +++ b/fs/xfs/xfs_iomap.h @@ -42,6 +42,7 @@ xfs_aligned_fsb_count( extern const struct iomap_ops xfs_buffered_write_iomap_ops; extern const struct iomap_ops xfs_direct_write_iomap_ops; +extern const struct iomap_ops xfs_dax_write_iomap_ops; extern const struct iomap_ops xfs_read_iomap_ops; extern const struct iomap_ops xfs_seek_iomap_ops; extern const struct iomap_ops xfs_xattr_iomap_ops; diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 67c8dc9de8aa..adf4467ab862 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -841,6 +841,7 @@ xfs_setattr_size( int error; uint lock_flags = 0; bool did_zeroing = false; + const struct iomap_ops *ops; ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); @@ -887,10 +888,15 @@ xfs_setattr_size( * extension, or zeroing out the rest of the block on a downward * truncate. */ + if (IS_DAX(inode)) + ops = &xfs_direct_write_iomap_ops; + else + ops = &xfs_buffered_write_iomap_ops; + if (newsize > oldsize) { trace_xfs_zero_eof(ip, oldsize, newsize - oldsize); error = iomap_zero_range(inode, oldsize, newsize - oldsize, - &did_zeroing, &xfs_buffered_write_iomap_ops); + &did_zeroing, ops); } else { /* * iomap won't detect a dirty page over an unwritten block (or a @@ -902,8 +908,7 @@ xfs_setattr_size( newsize); if (error) return error; - error = iomap_truncate_page(inode, newsize, &did_zeroing, - &xfs_buffered_write_iomap_ops); + error = iomap_truncate_page(inode, newsize, &did_zeroing, ops); } if (error) diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index f5b3a3da36b7..dfe4e1912ff9 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -1246,6 +1246,8 @@ xfs_reflink_zero_posteof( trace_xfs_zero_eof(ip, isize, pos - isize); return iomap_zero_range(VFS_I(ip), isize, pos - isize, NULL, + IS_DAX(VFS_I(ip)) ? + &xfs_dax_write_iomap_ops : &xfs_buffered_write_iomap_ops); }