From patchwork Sun Feb 27 12:07:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiyang Ruan X-Patchwork-Id: 12761626 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 5A4BBC43219 for ; Sun, 27 Feb 2022 12:08:00 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 98BA68D0005; Sun, 27 Feb 2022 07:07:58 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 93D1C8D0001; Sun, 27 Feb 2022 07:07:58 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7B6098D0005; Sun, 27 Feb 2022 07:07:58 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.a.hostedemail.com [64.99.140.24]) by kanga.kvack.org (Postfix) with ESMTP id 6C7D68D0001 for ; Sun, 27 Feb 2022 07:07:58 -0500 (EST) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay12.hostedemail.com (Postfix) with ESMTP id 2D8581205D3 for ; Sun, 27 Feb 2022 12:07:58 +0000 (UTC) X-FDA: 79188436236.12.7FA1892 Received: from heian.cn.fujitsu.com (mail.cn.fujitsu.com [183.91.158.132]) by imf22.hostedemail.com (Postfix) with ESMTP id 31612C0003 for ; Sun, 27 Feb 2022 12:07:56 +0000 (UTC) IronPort-Data: A9a23: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 IronPort-HdrOrdr: A9a23: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 X-IronPort-AV: E=Sophos;i="5.88,333,1635177600"; d="scan'208";a="122037686" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 27 Feb 2022 20:07:51 +0800 Received: from G08CNEXMBPEKD06.g08.fujitsu.local (unknown [10.167.33.206]) by cn.fujitsu.com (Postfix) with ESMTP id D5A014D169EF; Sun, 27 Feb 2022 20:07:48 +0800 (CST) Received: from G08CNEXCHPEKD09.g08.fujitsu.local (10.167.33.85) by G08CNEXMBPEKD06.g08.fujitsu.local (10.167.33.206) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Sun, 27 Feb 2022 20:07:48 +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; Sun, 27 Feb 2022 20:07:48 +0800 From: Shiyang Ruan To: , , , , CC: , , , , Subject: [PATCH v11 0/8] fsdax: introduce fs query to support reflink Date: Sun, 27 Feb 2022 20:07:39 +0800 Message-ID: <20220227120747.711169-1-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 X-yoursite-MailScanner-ID: D5A014D169EF.A274D X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@fujitsu.com X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 31612C0003 X-Stat-Signature: kx6nfi6f7zzgwnr3awke5kkkf45xn9oq Authentication-Results: imf22.hostedemail.com; dkim=none; spf=none (imf22.hostedemail.com: domain of ruansy.fnst@fujitsu.com has no SPF policy when checking 183.91.158.132) smtp.mailfrom=ruansy.fnst@fujitsu.com; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=fujitsu.com (policy=none) X-HE-Tag: 1645963676-958227 X-Bogosity: Ham, tests=bogofilter, spamicity=0.016023, 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 V10: - Use cmpxchg() to prevent concurrent registration/unregistration - Use phys_addr_t for ->memory_failure() - Add dax_entry_lock() for dax_lock_mapping_entry() - Fix offset and length calculation at the boundary of a filesystem 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 (8): 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: move pgoff_address() to vma_pgoff_address() 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 | 89 +++++++++++++ drivers/nvdimm/pmem.c | 16 +++ fs/dax.c | 140 ++++++++++++++++++--- fs/xfs/Makefile | 1 + fs/xfs/xfs_buf.c | 12 ++ fs/xfs/xfs_fsops.c | 3 + fs/xfs/xfs_mount.h | 1 + fs/xfs/xfs_notify_failure.c | 235 +++++++++++++++++++++++++++++++++++ fs/xfs/xfs_notify_failure.h | 10 ++ fs/xfs/xfs_super.c | 6 + include/linux/dax.h | 47 +++++++ include/linux/memremap.h | 12 ++ include/linux/mm.h | 17 +++ include/linux/page-flags.h | 6 + mm/memory-failure.c | 240 ++++++++++++++++++++++++++---------- 15 files changed, 747 insertions(+), 88 deletions(-) create mode 100644 fs/xfs/xfs_notify_failure.c create mode 100644 fs/xfs/xfs_notify_failure.h