From patchwork Sun Apr 10 16:08:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiyang Ruan X-Patchwork-Id: 12808177 Received: from heian.cn.fujitsu.com (mail.cn.fujitsu.com [183.91.158.132]) by smtp.subspace.kernel.org (Postfix) with ESMTP id F2A09137A for ; Sun, 10 Apr 2022 16:09:31 +0000 (UTC) IronPort-Data: A9a23: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 IronPort-HdrOrdr: A9a23:pSggPaOycVo3YMBcTimjsMiBIKoaSvp037Eqv3oedfUzSL39qynOpoV96faaslYssR0b9exoW5PwJE80l6QFgrX5VI3KNGKN1VdAR7sC0WKN+VLd8lXFh4xgPLlbAtNDIey1HV5nltz7/QX9N94hxeOM+Keuify29QYVcShaL7Fn8xxiChuWVml/RAx9D5I/E5aGouVdoT7IQwVuUu2LQmkCQ/PYp8DG0LbvYRs9DRYh7wWUyROEgYSKdSSl4g== X-IronPort-AV: E=Sophos;i="5.88,333,1635177600"; d="scan'208";a="123453820" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 11 Apr 2022 00:09:08 +0800 Received: from G08CNEXMBPEKD05.g08.fujitsu.local (unknown [10.167.33.204]) by cn.fujitsu.com (Postfix) with ESMTP id DE4DC4D16FF4; Mon, 11 Apr 2022 00:09:05 +0800 (CST) Received: from G08CNEXCHPEKD09.g08.fujitsu.local (10.167.33.85) by G08CNEXMBPEKD05.g08.fujitsu.local (10.167.33.204) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Mon, 11 Apr 2022 00:09:07 +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; Mon, 11 Apr 2022 00:09:04 +0800 From: Shiyang Ruan To: , , , , CC: , , , , Subject: [PATCH v12 0/7] fsdax: introduce fs query to support reflink Date: Mon, 11 Apr 2022 00:08:57 +0800 Message-ID: <20220410160904.3758789-1-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 2.35.1 Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-yoursite-MailScanner-ID: DE4DC4D16FF4.A3DF7 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@fujitsu.com X-Spam-Status: No This patchset is aimed to support shared pages tracking for fsdax. Changes since V11: - Rebased onto next-20220408 - Move dax_register_holder()'s job into fs_dax_get_by_bdev(), and move dax_unregister_holder()'s job into fs_put_dax() - Change ->memory_failure() signature to page-based - Drop "mm: move pgoff_address() to vma_pgoff_address()" - Fix #ifdef ... #endif wrappers - Other minor fixes 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 | 66 +++++++++- drivers/md/dm.c | 2 +- drivers/nvdimm/pmem.c | 17 +++ fs/dax.c | 128 ++++++++++++++++-- fs/erofs/super.c | 10 +- fs/ext2/super.c | 7 +- fs/ext4/super.c | 9 +- fs/xfs/Makefile | 5 + fs/xfs/xfs_buf.c | 6 +- fs/xfs/xfs_fsops.c | 3 + fs/xfs/xfs_mount.h | 1 + fs/xfs/xfs_notify_failure.c | 219 +++++++++++++++++++++++++++++++ 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, 691 insertions(+), 106 deletions(-) create mode 100644 fs/xfs/xfs_notify_failure.c