From patchwork Tue Apr 19 04:50:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiyang Ruan X-Patchwork-Id: 12817336 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53619C433EF for ; Tue, 19 Apr 2022 04:50:53 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B044F8D0035; Tue, 19 Apr 2022 00:50:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A8D9F8D0032; Tue, 19 Apr 2022 00:50:52 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 92D398D0035; Tue, 19 Apr 2022 00:50:52 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.28]) by kanga.kvack.org (Postfix) with ESMTP id 808518D0032 for ; Tue, 19 Apr 2022 00:50:52 -0400 (EDT) Received: from smtpin07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 453F324312 for ; Tue, 19 Apr 2022 04:50:52 +0000 (UTC) X-FDA: 79372403544.07.A645DC8 Received: from heian.cn.fujitsu.com (mail.cn.fujitsu.com [183.91.158.132]) by imf03.hostedemail.com (Postfix) with ESMTP id 5850520002 for ; Tue, 19 Apr 2022 04:50:49 +0000 (UTC) IronPort-Data: A9a23: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 IronPort-HdrOrdr: A9a23:Ox2m76hS8LA8xk4fM2ePciqv63BQXjAji2hC6mlwRA09TySZ//rOoB19726StN9xYgBHpTnuAtjifZqxz/FICOoqTNOftWvdyQmVxehZhOOIqVCNJ8SUzI5gPMlbHZSWcOeAaGSSk/yKmjWQIpIxxsWd6qC0iaP7x3dpdwtjbKZt9G5Ce36mO3wzVA9bHoA4CZbZwsJGogCrcXMRYt/+KWICW4H41qb2vaOjcRgbHAQm9QXLqTup7YTxGx+e0gxbcx4n+8ZazVT4 X-IronPort-AV: E=Sophos;i="5.88,333,1635177600"; d="scan'208";a="123671746" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 19 Apr 2022 12:50:48 +0800 Received: from G08CNEXMBPEKD05.g08.fujitsu.local (unknown [10.167.33.204]) by cn.fujitsu.com (Postfix) with ESMTP id D439E4D17171; Tue, 19 Apr 2022 12:50:47 +0800 (CST) Received: from G08CNEXJMPEKD02.g08.fujitsu.local (10.167.33.202) by G08CNEXMBPEKD05.g08.fujitsu.local (10.167.33.204) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Tue, 19 Apr 2022 12:50:47 +0800 Received: from G08CNEXCHPEKD09.g08.fujitsu.local (10.167.33.85) by G08CNEXJMPEKD02.g08.fujitsu.local (10.167.33.202) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Tue, 19 Apr 2022 12:50:49 +0800 Received: from irides.mr.mr (10.167.225.141) by G08CNEXCHPEKD09.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.23 via Frontend Transport; Tue, 19 Apr 2022 12:50:45 +0800 From: Shiyang Ruan To: , , , , CC: , , , , Subject: [PATCH v13 0/7] fsdax: introduce fs query to support reflink Date: Tue, 19 Apr 2022 12:50:38 +0800 Message-ID: <20220419045045.1664996-1-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 X-yoursite-MailScanner-ID: D439E4D17171.A07DF X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@fujitsu.com X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 5850520002 X-Rspam-User: Authentication-Results: imf03.hostedemail.com; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=fujitsu.com (policy=none); spf=none (imf03.hostedemail.com: domain of ruansy.fnst@fujitsu.com has no SPF policy when checking 183.91.158.132) smtp.mailfrom=ruansy.fnst@fujitsu.com X-Stat-Signature: yi3t16sy5d33bxez74efbmi1muzy3nfm X-HE-Tag: 1650343849-176575 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 aimed to support shared pages tracking for fsdax. Changes since V12: - Rebased onto next-20220414 - Do not continue ->notify_failure() if filesystem is not ready yet - Simplify the logic of setting CoW flag - Fix build warning/error and typo This patchset moves owner tracking from dax_assocaite_entry() to pmem device driver, by introducing an interface ->memory_failure() for struct pagemap. This interface is called by memory_failure() in mm, and implemented by pmem device. Then call holder operations to find the filesystem which the corrupted data located in, and call filesystem handler to track files or metadata associated 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() |* fsdax case |------------ |pgmap->ops->memory_failure() => pmem_pgmap_memory_failure() | dax_holder_notify_failure() => | dax_device->holder_ops->notify_failure() => | - xfs_dax_notify_failure() | |* xfs_dax_notify_failure() | |-------------------------- | | xfs_rmap_query_range() | | xfs_dax_failure_fn() | | * corrupted on metadata | | try to recover data, call xfs_force_shutdown() | | * corrupted on file data | | try to recover data, call mf_dax_kill_procs() |* normal case |------------- |mf_generic_kill_procs() == Shiyang Ruan (7): dax: Introduce holder for dax_device mm: factor helpers for memory_failure_dev_pagemap pagemap,pmem: Introduce ->memory_failure() fsdax: Introduce dax_lock_mapping_entry() mm: Introduce mf_dax_kill_procs() for fsdax case xfs: Implement ->notify_failure() for XFS fsdax: set a CoW flag when associate reflink mappings drivers/dax/super.c | 67 +++++++++- drivers/md/dm.c | 2 +- drivers/nvdimm/pmem.c | 17 +++ fs/dax.c | 113 ++++++++++++++-- fs/erofs/super.c | 10 +- fs/ext2/super.c | 7 +- fs/ext4/super.c | 9 +- fs/xfs/Makefile | 5 + fs/xfs/xfs_buf.c | 10 +- fs/xfs/xfs_fsops.c | 3 + fs/xfs/xfs_mount.h | 1 + fs/xfs/xfs_notify_failure.c | 220 +++++++++++++++++++++++++++++++ fs/xfs/xfs_super.h | 1 + include/linux/dax.h | 48 +++++-- include/linux/memremap.h | 12 ++ include/linux/mm.h | 2 + include/linux/page-flags.h | 6 + mm/memory-failure.c | 255 +++++++++++++++++++++++++----------- 18 files changed, 682 insertions(+), 106 deletions(-) create mode 100644 fs/xfs/xfs_notify_failure.c