From patchwork Thu Apr 8 12:04:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiyang Ruan X-Patchwork-Id: 12190869 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=-16.7 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 98121C433ED for ; Thu, 8 Apr 2021 12:05:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6BB566115B for ; Thu, 8 Apr 2021 12:05:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231572AbhDHMFk (ORCPT ); Thu, 8 Apr 2021 08:05:40 -0400 Received: from mail.cn.fujitsu.com ([183.91.158.132]:24879 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S230467AbhDHMFg (ORCPT ); Thu, 8 Apr 2021 08:05:36 -0400 IronPort-HdrOrdr: A9a23:WSmrB64l1Mx8I0MRhwPXwCjXdLJzesId70hD6mlaTxtJfsuE0/2/hfhz726RtB89elEF3eqBNq6JXG/G+fdOjLU5EL++UGDd1leAA41v4IDryT+lOwCWzIRg/Ih6dawWMrzNJHxbqeq/3wWiCdYnx7C8gcWVrMPT1W1kQw0vS4wI1XYbNi+hHkd7RBZLCPMCffLy2uN8uzGidX4LB/7LZEUtYu6rnb32vaOjSRsHKjpi0wOWkA6vgYSQLzGomjsYTBNDqI1PzVT4 X-IronPort-AV: E=Sophos;i="5.82,206,1613404800"; d="scan'208";a="106797311" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 08 Apr 2021 20:05:23 +0800 Received: from G08CNEXMBPEKD04.g08.fujitsu.local (unknown [10.167.33.201]) by cn.fujitsu.com (Postfix) with ESMTP id 2EBEE4CF2676; Thu, 8 Apr 2021 20:05:18 +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; Thu, 8 Apr 2021 20:05:08 +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; Thu, 8 Apr 2021 20:05:07 +0800 From: Shiyang Ruan To: , , , CC: , , , , , , , , Subject: [PATCH v4 6/7] fs/xfs: Handle CoW for fsdax write() path Date: Thu, 8 Apr 2021 20:04:31 +0800 Message-ID: <20210408120432.1063608-7-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20210408120432.1063608-1-ruansy.fnst@fujitsu.com> References: <20210408120432.1063608-1-ruansy.fnst@fujitsu.com> MIME-Version: 1.0 X-yoursite-MailScanner-ID: 2EBEE4CF2676.A45D4 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@fujitsu.com Precedence: bulk List-ID: X-Mailing-List: linux-xfs@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 | 58 +++++++++++++++++++++++++++++++++++++++++- fs/xfs/xfs_iomap.h | 4 +++ fs/xfs/xfs_iops.c | 7 +++-- fs/xfs/xfs_reflink.c | 3 +-- 6 files changed, 69 insertions(+), 15 deletions(-) diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index e7d68318e6a5..9fcea33dd2c9 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -954,8 +954,7 @@ xfs_free_file_space( return 0; 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); + error = xfs_iomap_zero_range(VFS_I(ip), offset, len, NULL); if (error) return error; diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index a007ca0711d9..5795d5d6f869 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -684,11 +684,8 @@ xfs_file_dax_write( pos = iocb->ki_pos; trace_xfs_file_dax_write(iocb, from); - 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: if (iolock) xfs_iunlock(ip, iolock); @@ -1309,7 +1306,7 @@ __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 e17ab7f42928..f818f989687b 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -760,7 +760,8 @@ 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) @@ -853,6 +854,38 @@ 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); + bool cow = xfs_is_cow_inode(ip); + + if (pos + written > i_size_read(inode)) { + i_size_write(inode, pos + written); + error = xfs_setfilesize(ip, pos, written); + if (error && cow) { + xfs_reflink_cancel_cow_range(ip, pos, written, true); + return error; + } + } + if (cow) + 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, @@ -1314,3 +1347,26 @@ xfs_xattr_iomap_begin( const struct iomap_ops xfs_xattr_iomap_ops = { .iomap_begin = xfs_xattr_iomap_begin, }; + +int +xfs_iomap_zero_range( + struct inode *inode, + loff_t offset, + loff_t len, + bool *did_zero) +{ + return iomap_zero_range(inode, offset, len, did_zero, + IS_DAX(inode) ? &xfs_dax_write_iomap_ops : + &xfs_buffered_write_iomap_ops); +} + +int +xfs_iomap_truncate_page( + struct inode *inode, + loff_t pos, + bool *did_zero) +{ + return iomap_truncate_page(inode, pos, did_zero, + IS_DAX(inode) ? &xfs_dax_write_iomap_ops : + &xfs_buffered_write_iomap_ops); +} diff --git a/fs/xfs/xfs_iomap.h b/fs/xfs/xfs_iomap.h index 7d3703556d0e..8adb2bf78a5a 100644 --- a/fs/xfs/xfs_iomap.h +++ b/fs/xfs/xfs_iomap.h @@ -14,6 +14,9 @@ struct xfs_bmbt_irec; int xfs_iomap_write_direct(struct xfs_inode *ip, xfs_fileoff_t offset_fsb, xfs_fileoff_t count_fsb, struct xfs_bmbt_irec *imap); int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t, bool); +int xfs_iomap_zero_range(struct inode *inode, loff_t offset, loff_t len, + bool *did_zero); +int xfs_iomap_truncate_page(struct inode *inode, loff_t pos, bool *did_zero); xfs_fileoff_t xfs_iomap_eof_align_last_fsb(struct xfs_inode *ip, xfs_fileoff_t end_fsb); @@ -42,6 +45,7 @@ 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 66ebccb5a6ff..db8eeaa8a773 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -879,8 +879,8 @@ xfs_setattr_size( */ 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); + error = xfs_iomap_zero_range(inode, oldsize, newsize - oldsize, + &did_zeroing); } else { /* * iomap won't detect a dirty page over an unwritten block (or a @@ -892,8 +892,7 @@ xfs_setattr_size( newsize); if (error) return error; - error = iomap_truncate_page(inode, newsize, &did_zeroing, - &xfs_buffered_write_iomap_ops); + error = xfs_iomap_truncate_page(inode, newsize, &did_zeroing); } if (error) diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index 9ef9f98725a2..a4cd6e8a7aa0 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -1266,8 +1266,7 @@ xfs_reflink_zero_posteof( return 0; trace_xfs_zero_eof(ip, isize, pos - isize); - return iomap_zero_range(VFS_I(ip), isize, pos - isize, NULL, - &xfs_buffered_write_iomap_ops); + return xfs_iomap_zero_range(VFS_I(ip), isize, pos - isize, NULL); } /*