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=ham 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 0DF22C4361B for ; Tue, 15 Dec 2020 12:14:35 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8A48F2223E for ; Tue, 15 Dec 2020 12:14:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8A48F2223E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=cn.fujitsu.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C01E36B007B; Tue, 15 Dec 2020 07:14:33 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id BB09A6B007D; Tue, 15 Dec 2020 07:14:33 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AC79E8D0005; Tue, 15 Dec 2020 07:14:33 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0251.hostedemail.com [216.40.44.251]) by kanga.kvack.org (Postfix) with ESMTP id 95C976B007B for ; Tue, 15 Dec 2020 07:14:33 -0500 (EST) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 54C42181AEF31 for ; Tue, 15 Dec 2020 12:14:33 +0000 (UTC) X-FDA: 77595409626.03.place78_4816eec27423 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin03.hostedemail.com (Postfix) with ESMTP id 3794A28A4E9 for ; Tue, 15 Dec 2020 12:14:33 +0000 (UTC) X-HE-Tag: place78_4816eec27423 X-Filterd-Recvd-Size: 4835 Received: from heian.cn.fujitsu.com (mail.cn.fujitsu.com [183.91.158.132]) by imf43.hostedemail.com (Postfix) with ESMTP for ; Tue, 15 Dec 2020 12:14:31 +0000 (UTC) X-IronPort-AV: E=Sophos;i="5.78,420,1599494400"; d="scan'208";a="102420175" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 15 Dec 2020 20:14:30 +0800 Received: from G08CNEXMBPEKD05.g08.fujitsu.local (unknown [10.167.33.204]) by cn.fujitsu.com (Postfix) with ESMTP id 649AF4CE5CCA; Tue, 15 Dec 2020 20:14:29 +0800 (CST) Received: from G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.203) by G08CNEXMBPEKD05.g08.fujitsu.local (10.167.33.204) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 15 Dec 2020 20:14:28 +0800 Received: from localhost.localdomain (10.167.225.141) by G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 15 Dec 2020 20:14:28 +0800 From: Shiyang Ruan To: , , , CC: , , , , , , , , , Subject: [RFC PATCH v3 0/9] fsdax: introduce fs query to support reflink Date: Tue, 15 Dec 2020 20:14:05 +0800 Message-ID: <20201215121414.253660-1-ruansy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Type: text/plain X-yoursite-MailScanner-ID: 649AF4CE5CCA.AE812 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@cn.fujitsu.com Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patchset is a try to resolve the problem of tracking shared page for fsdax. Change from v2: - Adjust the order of patches - Divide the infrastructure and the drivers that use it - Rebased to v5.10 Change from 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() =3D> pmem_pgmap_memory_failure() gendisk->fops->corrupted_range() =3D> - pmem_corrupted_range() - md_blk_corrupted_range() sb->s_ops->currupted_range() =3D> 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=20 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 (9): 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 block/genhd.c | 12 +++ drivers/md/dm-linear.c | 8 ++ drivers/md/dm.c | 66 +++++++++++++++ drivers/nvdimm/pmem.c | 51 ++++++++++++ fs/block_dev.c | 21 +++++ fs/dax.c | 24 +++--- fs/xfs/xfs_fsops.c | 10 +++ fs/xfs/xfs_mount.h | 2 + fs/xfs/xfs_super.c | 93 +++++++++++++++++++++ include/linux/blkdev.h | 2 + include/linux/dax.h | 5 +- include/linux/device-mapper.h | 2 + include/linux/fs.h | 2 + include/linux/genhd.h | 8 ++ include/linux/memremap.h | 8 ++ include/linux/mm.h | 9 ++ mm/memory-failure.c | 150 +++++++++++++++++++--------------- 17 files changed, 391 insertions(+), 82 deletions(-) --=20 2.29.2