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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 55450C433EF for ; Sun, 27 Feb 2022 12:08:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230396AbiB0MIi (ORCPT ); Sun, 27 Feb 2022 07:08:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40606 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230289AbiB0MIc (ORCPT ); Sun, 27 Feb 2022 07:08:32 -0500 Received: from heian.cn.fujitsu.com (mail.cn.fujitsu.com [183.91.158.132]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 262D725EA7; Sun, 27 Feb 2022 04:07:55 -0800 (PST) IronPort-Data: =?us-ascii?q?A9a23=3AhfpkI6gn03LpJm5iP9LzOcBWX161CxEKZh0ujC4?= =?us-ascii?q?5NGQNrF6WrkUHyjYWX2yHa/feMGenc410PIrk/EIP7JPUn9JnG1RtqHw8FHgiR?= =?us-ascii?q?ejtX4rAdhiqV8+xwmwvdGo+toNGLICowPkcFhcwnT/wdOixxZVA/fvQHOCkUra?= =?us-ascii?q?dYnkZqTJME0/NtzoywobVvaY42bBVMyvV0T/Di5W31G2NglaYAUpIg063ky6Di?= =?us-ascii?q?dyp0N8uUvPSUtgQ1LPWvyF94JvyvshdJVOgKmVfNrbSq+ouUNiEEm3lExcFUrt?= =?us-ascii?q?Jk57wdAsEX7zTIROTzHFRXsBOgDAb/mprjPl9b6FaNC+7iB3Q9zx14M9QvJqrW?= =?us-ascii?q?EEnOLbQsOoAURhECDw4NqpDkFPCCSHl65TIkBOWLRMAxN0rVinaJ7Yw9u9pAG1?= =?us-ascii?q?m++YfLTcXZBGfwemxxdqTSuJsrsUlItPiMI4Wtjdn1z6xJfovR9bBBbrL4dtZ1?= =?us-ascii?q?TIrrsFIAfvaIcEebFJHYBbfZBtAElQaEpQzmKGvnHaXWzlZrk+F4K8yy2vNxQd?= =?us-ascii?q?ylr/3P7L9fMKGRMBQtkKZvX7duWD4BAwKctCS11Kt8Huqi6nEnT7TX5gbH7m1s?= =?us-ascii?q?PVthTW7wm0VFQ1TW0C3rOe0jmagVN9FbU8Z4Cwjqe417kPDZt38WQCo5X2JpBg?= =?us-ascii?q?RX/JOHOAgrgKA0KzZ50CeHGdsZjpAbsE28d84XhQ02VKT2dDkHzpitPuSU331y?= =?us-ascii?q?1s+hVteIgBMdSlbO3BCFlBDvrHeTEgIpkqnZr5e/GSd07UZwQ3N/g0=3D?= IronPort-HdrOrdr: =?us-ascii?q?A9a23=3AqTB5vKvWqXOeuAG9rVpcKm5Y7skCW4Mji2hC?= =?us-ascii?q?6mlwRA09TyXGra2TdaUgvyMc1gx7ZJhBo7+90ci7MBfhHPtOjbX5Uo3SOTUO1F?= =?us-ascii?q?HYTr2KjrGSuwEIeReOj9K1vJ0IG8YeNDSZNykdsS+Q2mmF+rgbsbq6GPfCv5a4?= =?us-ascii?q?854hd3AbV4hQqyNCTiqLGEx/QwdLQbI/CZqn/8JC4x6tY24eYMiXDmQMG7Grna?= =?us-ascii?q?y4qLvWJTo9QzI34giHij2lrJb8Dhijxx8bFxdC260r/2TpmxHwoo+jr/a44BnB?= =?us-ascii?q?0HK71eUkpPLRjv94QOCcgMkcLTvhziyyYp56ZrGEtDcp5Mmy9VcDirD30mEdFv?= =?us-ascii?q?U2z0mUUnC+oBPr1QWl+i0p8WXexViRhmamidDlRQg9F9FKietiA2zkAnIbzZlB?= =?us-ascii?q?OZ9wrimkX8I9N2KLoM293am9a/hSrDv8nZJ4+tRjwkC2UuMlGcBsRMIkjQ9o+a?= =?us-ascii?q?w7bVjHAbAcYZJT5f7nlYtrmHOhHg7kVzpUsa2RtkpaJGb7fqFFgL3h7wRr?= 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 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-yoursite-MailScanner-ID: D5A014D169EF.A274D X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@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. 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 -- 2.35.1