From mboxrd@z Thu Jan 1 00:00:00 1970 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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 8552AC4332B for ; Wed, 30 Dec 2020 16:59:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 68B8422288 for ; Wed, 30 Dec 2020 16:59:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726703AbgL3Q7t (ORCPT ); Wed, 30 Dec 2020 11:59:49 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:50482 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726594AbgL3Q7t (ORCPT ); Wed, 30 Dec 2020 11:59:49 -0500 X-IronPort-AV: E=Sophos;i="5.78,461,1599494400"; d="scan'208";a="103085830" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 31 Dec 2020 00:58:39 +0800 Received: from G08CNEXMBPEKD05.g08.fujitsu.local (unknown [10.167.33.204]) by cn.fujitsu.com (Postfix) with ESMTP id CCD554CE6018; Thu, 31 Dec 2020 00:58:32 +0800 (CST) Received: from G08CNEXCHPEKD04.g08.fujitsu.local (10.167.33.200) by G08CNEXMBPEKD05.g08.fujitsu.local (10.167.33.204) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 31 Dec 2020 00:58:32 +0800 Received: from irides.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, 31 Dec 2020 00:58:32 +0800 From: Shiyang Ruan To: , , , CC: , , , , , , , , , Subject: [PATCH 00/10] fsdax: introduce fs query to support reflink Date: Thu, 31 Dec 2020 00:55:51 +0800 Message-ID: <20201230165601.845024-1-ruansy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-yoursite-MailScanner-ID: CCD554CE6018.ACD3C X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@cn.fujitsu.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset is aimed to support shared pages tracking for fsdax. Change from RFC v3: - Do not lock dax entry in memory failure handler - Add a helper function for corrupted_range - Add restrictions in xfs code - Fix code style - remove the useless association and lock in fsdax Change from RFC v2: - Adjust the order of patches - Divide the infrastructure and the drivers that use it - Rebased to v5.10 Change from RFC v1: - Introduce ->block_lost() for block device - Support mapped device - Add 'not available' warning for realtime device in XFS - Rebased to v5.10-rc1 This patchset moves owner tracking from dax_assocaite_entry() to pmem device driver, by introducing an interface ->memory_failure() of struct pagemap. This interface is called by memory_failure() in mm, and implemented by pmem device. Then pmem device calls its ->corrupted_range() to find the filesystem which the corrupted data located in, and call filesystem handler to track files or metadata assocaited with this page. Finally we are able to try to fix the corrupted data in filesystem and do other necessary processing, such as killing processes who are using the files affected. The call trace is like this: memory_failure() pgmap->ops->memory_failure() => pmem_pgmap_memory_failure() gendisk->fops->corrupted_range() => - pmem_corrupted_range() - md_blk_corrupted_range() sb->s_ops->currupted_range() => xfs_fs_corrupted_range() xfs_rmap_query_range() xfs_currupt_helper() * corrupted on metadata try to recover data, call xfs_force_shutdown() * corrupted on file data try to recover data, call mf_dax_mapping_kill_procs() The fsdax & reflink support for XFS is not contained in this patchset. (Rebased on v5.10) -- Shiyang Ruan (10): pagemap: Introduce ->memory_failure() blk: Introduce ->corrupted_range() for block device fs: Introduce ->corrupted_range() for superblock mm, fsdax: Refactor memory-failure handler for dax mapping mm, pmem: Implement ->memory_failure() in pmem driver pmem: Implement ->corrupted_range() for pmem driver dm: Introduce ->rmap() to find bdev offset md: Implement ->corrupted_range() xfs: Implement ->corrupted_range() for XFS fs/dax: remove useless functions block/genhd.c | 12 ++++ drivers/md/dm-linear.c | 8 +++ drivers/md/dm.c | 54 ++++++++++++++ drivers/nvdimm/pmem.c | 43 +++++++++++ fs/block_dev.c | 37 ++++++++++ fs/dax.c | 115 ++++------------------------- fs/xfs/xfs_fsops.c | 5 ++ fs/xfs/xfs_mount.h | 1 + fs/xfs/xfs_super.c | 107 +++++++++++++++++++++++++++ include/linux/blkdev.h | 2 + include/linux/dax.h | 3 +- include/linux/device-mapper.h | 2 + include/linux/fs.h | 2 + include/linux/genhd.h | 3 + include/linux/memremap.h | 8 +++ include/linux/mm.h | 9 +++ mm/memory-failure.c | 131 ++++++++++++++++++---------------- 17 files changed, 375 insertions(+), 167 deletions(-) -- 2.29.2