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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 4FA41C432BE for ; Fri, 30 Jul 2021 10:02:27 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id F028E60F48 for ; Fri, 30 Jul 2021 10:02:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org F028E60F48 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=fujitsu.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 5D8366B0074; Fri, 30 Jul 2021 06:02:22 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 58A8E6B0075; Fri, 30 Jul 2021 06:02:22 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 38D218D0001; Fri, 30 Jul 2021 06:02:22 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0058.hostedemail.com [216.40.44.58]) by kanga.kvack.org (Postfix) with ESMTP id 1DC996B0074 for ; Fri, 30 Jul 2021 06:02:22 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id C19188249980 for ; Fri, 30 Jul 2021 10:02:21 +0000 (UTC) X-FDA: 78418814082.03.BF07430 Received: from heian.cn.fujitsu.com (mail.cn.fujitsu.com [183.91.158.132]) by imf17.hostedemail.com (Postfix) with ESMTP id C57F3F003498 for ; Fri, 30 Jul 2021 10:02:20 +0000 (UTC) IronPort-HdrOrdr: =?us-ascii?q?A9a23=3A075swKH1jGovkDZbpLqE1MeALOsnbusQ8zAX?= =?us-ascii?q?PiFKOHhom6mj+vxG88506faKslwssR0b+OxoW5PwJE80l6QFgrX5VI3KNGbbUQ?= =?us-ascii?q?CTXeNfBOXZowHIKmnX8+5x8eNaebFiNduYNzNHpPe/zA6mM9tI+rW6zJw=3D?= X-IronPort-AV: E=Sophos;i="5.84,281,1620662400"; d="scan'208";a="112074019" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 30 Jul 2021 18:02:19 +0800 Received: from G08CNEXMBPEKD04.g08.fujitsu.local (unknown [10.167.33.201]) by cn.fujitsu.com (Postfix) with ESMTP id CA90D4D0D4A1; Fri, 30 Jul 2021 18:02:13 +0800 (CST) Received: from G08CNEXCHPEKD09.g08.fujitsu.local (10.167.33.85) by G08CNEXMBPEKD04.g08.fujitsu.local (10.167.33.201) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Fri, 30 Jul 2021 18:02:14 +0800 Received: from irides.mr.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; Fri, 30 Jul 2021 18:02:12 +0800 From: Shiyang Ruan To: , , , , , CC: , , , , , Subject: [PATCH RESEND v6 6/9] xfs: Implement ->notify_failure() for XFS Date: Fri, 30 Jul 2021 18:01:55 +0800 Message-ID: <20210730100158.3117319-7-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210730100158.3117319-1-ruansy.fnst@fujitsu.com> References: <20210730100158.3117319-1-ruansy.fnst@fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain X-yoursite-MailScanner-ID: CA90D4D0D4A1.A4774 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@fujitsu.com X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: C57F3F003498 Authentication-Results: imf17.hostedemail.com; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=fujitsu.com (policy=none); spf=none (imf17.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: tk1todxoide734zyyibc48gmzrawq9i8 X-HE-Tag: 1627639340-127686 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 function is used to handle errors which may cause data lost in filesystem. Such as memory failure in fsdax mode. If the rmap feature of XFS enabled, we can query it to find files and metadata which are associated with the corrupt data. For now all we do is kill processes with that file mapped into their address spaces, but future patches could actually do something about corrupt metadata. After that, the memory failure needs to notify the processes who are using those files. Signed-off-by: Shiyang Ruan --- drivers/dax/super.c | 12 ++++ fs/xfs/xfs_fsops.c | 5 ++ fs/xfs/xfs_mount.h | 1 + fs/xfs/xfs_super.c | 135 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/dax.h | 13 +++++ 5 files changed, 166 insertions(+) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 00c32dfa5665..63f7b63d078d 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -65,6 +65,18 @@ struct dax_device *fs_dax_get_by_bdev(struct block_dev= ice *bdev) return dax_get_by_host(bdev->bd_disk->disk_name); } EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev); + +void fs_dax_set_holder(struct dax_device *dax_dev, void *holder, + const struct dax_holder_operations *ops) +{ + dax_set_holder(dax_dev, holder, ops); +} +EXPORT_SYMBOL_GPL(fs_dax_set_holder); +void *fs_dax_get_holder(struct dax_device *dax_dev) +{ + return dax_get_holder(dax_dev); +} +EXPORT_SYMBOL_GPL(fs_dax_get_holder); #endif =20 bool __generic_fsdax_supported(struct dax_device *dax_dev, diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index 6ed29b158312..e96ddb5c28bc 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -549,6 +549,11 @@ xfs_do_force_shutdown( flags, __return_address, fname, lnnum); if (XFS_ERRLEVEL_HIGH <=3D xfs_error_level) xfs_stack_trace(); + } else if (flags & SHUTDOWN_CORRUPT_META) { + xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT, +"Corruption of on-disk metadata detected. Shutting down filesystem"); + if (XFS_ERRLEVEL_HIGH <=3D xfs_error_level) + xfs_stack_trace(); } else if (logerror) { xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR, "Log I/O error (0x%x) detected at %pS (%s:%d). Shutting down filesystem"= , diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index c78b63fe779a..203eb62d16d0 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -277,6 +277,7 @@ void xfs_do_force_shutdown(struct xfs_mount *mp, int = flags, char *fname, #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed = */ #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount *= / #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structu= res */ +#define SHUTDOWN_CORRUPT_META 0x0010 /* corrupt metadata on device */ =20 /* * Flags for xfs_mountfs diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 2c9e26a44546..4a362e14318d 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -37,11 +37,19 @@ #include "xfs_reflink.h" #include "xfs_pwork.h" #include "xfs_ag.h" +#include "xfs_alloc.h" +#include "xfs_rmap.h" +#include "xfs_rmap_btree.h" +#include "xfs_rtalloc.h" +#include "xfs_bit.h" =20 #include #include #include +#include +#include =20 +static const struct dax_holder_operations xfs_dax_holder_operations; static const struct super_operations xfs_super_operations; =20 static struct kset *xfs_kset; /* top-level xfs sysfs dir */ @@ -352,6 +360,7 @@ xfs_close_devices( =20 xfs_free_buftarg(mp->m_logdev_targp); xfs_blkdev_put(logdev); + fs_dax_set_holder(dax_logdev, NULL, NULL); fs_put_dax(dax_logdev); } if (mp->m_rtdev_targp) { @@ -360,9 +369,11 @@ xfs_close_devices( =20 xfs_free_buftarg(mp->m_rtdev_targp); xfs_blkdev_put(rtdev); + fs_dax_set_holder(dax_rtdev, NULL, NULL); fs_put_dax(dax_rtdev); } xfs_free_buftarg(mp->m_ddev_targp); + fs_dax_set_holder(dax_ddev, NULL, NULL); fs_put_dax(dax_ddev); } =20 @@ -386,6 +397,7 @@ xfs_open_devices( struct block_device *logdev =3D NULL, *rtdev =3D NULL; int error; =20 + fs_dax_set_holder(dax_ddev, mp, &xfs_dax_holder_operations); /* * Open real time and log devices - order is important. */ @@ -394,6 +406,9 @@ xfs_open_devices( if (error) goto out; dax_logdev =3D fs_dax_get_by_bdev(logdev); + if (dax_logdev !=3D dax_ddev) + fs_dax_set_holder(dax_logdev, mp, + &xfs_dax_holder_operations); } =20 if (mp->m_rtname) { @@ -408,6 +423,7 @@ xfs_open_devices( goto out_close_rtdev; } dax_rtdev =3D fs_dax_get_by_bdev(rtdev); + fs_dax_set_holder(dax_rtdev, mp, &xfs_dax_holder_operations); } =20 /* @@ -1070,6 +1086,125 @@ xfs_fs_free_cached_objects( return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); } =20 +static int +xfs_corrupt_helper( + struct xfs_btree_cur *cur, + struct xfs_rmap_irec *rec, + void *data) +{ + struct xfs_inode *ip; + struct address_space *mapping; + int error =3D 0, *flags =3D data, i; + + if (XFS_RMAP_NON_INODE_OWNER(rec->rm_owner) || + (rec->rm_flags & (XFS_RMAP_ATTR_FORK | XFS_RMAP_BMBT_BLOCK))) { + // TODO check and try to fix metadata + xfs_force_shutdown(cur->bc_mp, SHUTDOWN_CORRUPT_META); + return -EFSCORRUPTED; + } + + /* Get files that incore, filter out others that are not in use. */ + error =3D xfs_iget(cur->bc_mp, cur->bc_tp, rec->rm_owner, XFS_IGET_INCO= RE, + 0, &ip); + if (error) + return error; + + mapping =3D VFS_I(ip)->i_mapping; + if (IS_ENABLED(CONFIG_MEMORY_FAILURE)) { + for (i =3D 0; i < rec->rm_blockcount; i++) { + error =3D mf_dax_kill_procs(mapping, rec->rm_offset + i, + *flags); + if (error) + break; + } + } + // TODO try to fix data + xfs_irele(ip); + + return error; +} + +static loff_t +xfs_dax_bdev_offset( + struct xfs_mount *mp, + struct dax_device *dax_dev, + loff_t disk_offset) +{ + struct block_device *bdev; + + if (mp->m_ddev_targp->bt_daxdev =3D=3D dax_dev) + bdev =3D mp->m_ddev_targp->bt_bdev; + else if (mp->m_logdev_targp->bt_daxdev =3D=3D dax_dev) + bdev =3D mp->m_logdev_targp->bt_bdev; + else + bdev =3D mp->m_rtdev_targp->bt_bdev; + + return disk_offset - (get_start_sect(bdev) << SECTOR_SHIFT); +} + +static int +xfs_dax_notify_failure( + struct dax_device *dax_dev, + loff_t offset, + size_t len, + void *data) +{ + struct xfs_mount *mp =3D fs_dax_get_holder(dax_dev); + struct xfs_trans *tp =3D NULL; + struct xfs_btree_cur *cur =3D NULL; + struct xfs_buf *agf_bp =3D NULL; + struct xfs_rmap_irec rmap_low, rmap_high; + loff_t bdev_offset =3D xfs_dax_bdev_offset(mp, dax_dev, + offset); + xfs_fsblock_t fsbno =3D XFS_B_TO_FSB(mp, bdev_offset); + xfs_filblks_t bcnt =3D XFS_B_TO_FSB(mp, len); + xfs_agnumber_t agno =3D XFS_FSB_TO_AGNO(mp, fsbno); + xfs_agblock_t agbno =3D XFS_FSB_TO_AGBNO(mp, fsbno); + int error =3D 0; + + if (mp->m_logdev_targp && mp->m_logdev_targp->bt_daxdev =3D=3D dax_dev = && + mp->m_logdev_targp !=3D mp->m_ddev_targp) { + xfs_err(mp, "ondisk log corrupt, shutting down fs!"); + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_META); + return -EFSCORRUPTED; + } + + if (!xfs_sb_version_hasrmapbt(&mp->m_sb)) { + xfs_warn(mp, "notify_failure() needs rmapbt enabled!"); + return -EOPNOTSUPP; + } + + error =3D xfs_trans_alloc_empty(mp, &tp); + if (error) + return error; + + error =3D xfs_alloc_read_agf(mp, tp, agno, 0, &agf_bp); + if (error) + goto out_cancel_tp; + + cur =3D xfs_rmapbt_init_cursor(mp, tp, agf_bp, agf_bp->b_pag); + + /* Construct a range for rmap query */ + memset(&rmap_low, 0, sizeof(rmap_low)); + memset(&rmap_high, 0xFF, sizeof(rmap_high)); + rmap_low.rm_startblock =3D rmap_high.rm_startblock =3D agbno; + rmap_low.rm_blockcount =3D rmap_high.rm_blockcount =3D bcnt; + + error =3D xfs_rmap_query_range(cur, &rmap_low, &rmap_high, + xfs_corrupt_helper, data); + + xfs_btree_del_cursor(cur, error); + xfs_trans_brelse(tp, agf_bp); + +out_cancel_tp: + xfs_trans_cancel(tp); + return error; +} + +static const struct dax_holder_operations xfs_dax_holder_operations =3D = { + .notify_failure =3D xfs_dax_notify_failure, +}; + static const struct super_operations xfs_super_operations =3D { .alloc_inode =3D xfs_fs_alloc_inode, .destroy_inode =3D xfs_fs_destroy_inode, diff --git a/include/linux/dax.h b/include/linux/dax.h index 359e809516b8..c8a188b76031 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -160,6 +160,9 @@ static inline void fs_put_dax(struct dax_device *dax_= dev) } =20 struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev); +void fs_dax_set_holder(struct dax_device *dax_dev, void *holder, + const struct dax_holder_operations *ops); +void *fs_dax_get_holder(struct dax_device *dax_dev); int dax_writeback_mapping_range(struct address_space *mapping, struct dax_device *dax_dev, struct writeback_control *wbc); =20 @@ -191,6 +194,16 @@ static inline struct dax_device *fs_dax_get_by_bdev(= struct block_device *bdev) return NULL; } =20 +static inline void fs_dax_set_holder(struct dax_device *dax_dev, void *h= older, + const struct dax_holder_operations *ops) +{ +} + +static inline void *fs_dax_get_holder(struct dax_device *dax_dev) +{ + return NULL; +} + static inline struct page *dax_layout_busy_page(struct address_space *ma= pping) { return NULL; --=20 2.32.0