From patchwork Mon Jan 25 22:55:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ruan Shiyang X-Patchwork-Id: 12044671 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 8ECE6C433E0 for ; Mon, 25 Jan 2021 22:55:51 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 46F1C22482 for ; Mon, 25 Jan 2021 22:55:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 46F1C22482 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=cn.fujitsu.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id C52EE100EBBDF; Mon, 25 Jan 2021 14:55:50 -0800 (PST) Received-SPF: None (mailfrom) identity=mailfrom; client-ip=183.91.158.132; helo=heian.cn.fujitsu.com; envelope-from=ruansy.fnst@cn.fujitsu.com; receiver= Received: from heian.cn.fujitsu.com (mail.cn.fujitsu.com [183.91.158.132]) by ml01.01.org (Postfix) with ESMTP id BCE93100EBBDA for ; Mon, 25 Jan 2021 14:55:47 -0800 (PST) X-IronPort-AV: E=Sophos;i="5.79,374,1602518400"; d="scan'208";a="103820589" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 26 Jan 2021 06:55:45 +0800 Received: from G08CNEXMBPEKD05.g08.fujitsu.local (unknown [10.167.33.204]) by cn.fujitsu.com (Postfix) with ESMTP id EB5904CE6781; Tue, 26 Jan 2021 06:55:40 +0800 (CST) Received: from G08CNEXCHPEKD04.g08.fujitsu.local (10.167.33.200) by G08CNEXMBPEKD05.g08.fujitsu.local (10.167.33.204) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 26 Jan 2021 06:55:41 +0800 Received: from irides.mr.mr.mr (10.167.225.141) by G08CNEXCHPEKD04.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 26 Jan 2021 06:55:39 +0800 From: Shiyang Ruan To: , , , Subject: [PATCH v2 09/10] xfs: Implement ->corrupted_range() for XFS Date: Tue, 26 Jan 2021 06:55:25 +0800 Message-ID: <20210125225526.1048877-10-ruansy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210125225526.1048877-1-ruansy.fnst@cn.fujitsu.com> References: <20210125225526.1048877-1-ruansy.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-yoursite-MailScanner-ID: EB5904CE6781.AB736 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@cn.fujitsu.com Message-ID-Hash: EQ3MHDRFPWJGU5VXFIMBQF6NE3JNSBZN X-Message-ID-Hash: EQ3MHDRFPWJGU5VXFIMBQF6NE3JNSBZN X-MailFrom: ruansy.fnst@cn.fujitsu.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: linux-fsdevel@vger.kernel.org, linux-raid@vger.kernel.org, darrick.wong@oracle.com, david@fromorbit.com, hch@lst.de, song@kernel.org, rgoldwyn@suse.de, qi.fuli@fujitsu.com, y-goto@fujitsu.com X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: This function is used to handle errors which may cause data lost in filesystem. Such as memory failure in fsdax mode. In XFS, it requires "rmapbt" feature in order to query for files or metadata which associated to the corrupted data. Then we could call fs recover functions to try to repair the corrupted data.(did not implemented in this patchset) After that, the memory failure also needs to notify the processes who are using those files. Only support data device. Realtime device is not supported for now. Signed-off-by: Shiyang Ruan --- fs/xfs/xfs_fsops.c | 5 +++ fs/xfs/xfs_mount.h | 1 + fs/xfs/xfs_super.c | 109 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 115 insertions(+) diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index 959ce91a3755..f03901a5c673 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -498,6 +498,11 @@ xfs_do_force_shutdown( "Corruption of in-memory data detected. Shutting down filesystem"); if (XFS_ERRLEVEL_HIGH <= 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 <= xfs_error_level) + xfs_stack_trace(); } else if (logerror) { xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR, "Log I/O Error Detected. Shutting down filesystem"); diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index dfa429b77ee2..8f0df67ffcc1 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -274,6 +274,7 @@ 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 structures */ +#define SHUTDOWN_CORRUPT_META 0x0010 /* corrupt metadata on device */ /* * Flags for xfs_mountfs diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 813be879a5e5..93093fe0ee8a 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -35,6 +35,11 @@ #include "xfs_refcount_item.h" #include "xfs_bmap_item.h" #include "xfs_reflink.h" +#include "xfs_alloc.h" +#include "xfs_rmap.h" +#include "xfs_rmap_btree.h" +#include "xfs_rtalloc.h" +#include "xfs_bit.h" #include #include @@ -1105,6 +1110,109 @@ xfs_fs_free_cached_objects( return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); } +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 rc = 0; + int *flags = data; + + 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 + rc = -EFSCORRUPTED; + } else { + /* + * Get files that incore, filter out others that are not in use. + */ + rc = xfs_iget(cur->bc_mp, cur->bc_tp, rec->rm_owner, + XFS_IGET_INCORE, 0, &ip); + if (rc || !ip) + return rc; + if (!VFS_I(ip)->i_mapping) + goto out; + + mapping = VFS_I(ip)->i_mapping; + if (IS_DAX(VFS_I(ip))) + rc = mf_dax_mapping_kill_procs(mapping, rec->rm_offset, + *flags); + else + mapping_set_error(mapping, -EIO); + + // TODO try to fix data +out: + xfs_irele(ip); + } + + return rc; +} + +static int +xfs_fs_corrupted_range( + struct super_block *sb, + struct block_device *bdev, + loff_t offset, + size_t len, + void *data) +{ + struct xfs_mount *mp = XFS_M(sb); + struct xfs_trans *tp = NULL; + struct xfs_btree_cur *cur = NULL; + struct xfs_rmap_irec rmap_low, rmap_high; + struct xfs_buf *agf_bp = NULL; + xfs_fsblock_t fsbno = XFS_B_TO_FSB(mp, offset); + xfs_filblks_t bcnt = XFS_B_TO_FSB(mp, len); + xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, fsbno); + xfs_agblock_t agbno = XFS_FSB_TO_AGBNO(mp, fsbno); + int error = 0; + + if (mp->m_rtdev_targp && mp->m_rtdev_targp->bt_bdev == bdev) { + xfs_warn(mp, "corrupted_range support not available for realtime device!"); + return 0; + } + if (mp->m_logdev_targp && mp->m_logdev_targp->bt_bdev == bdev && + mp->m_logdev_targp != mp->m_ddev_targp) { + xfs_err(mp, "ondisk log corrupt, shutting down fs!"); + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_META); + return 0; + } + + if (!xfs_sb_version_hasrmapbt(&mp->m_sb)) { + xfs_warn(mp, "corrupted_range needs rmapbt enabled!"); + return 0; + } + + error = xfs_trans_alloc_empty(mp, &tp); + if (error) + return error; + + error = xfs_alloc_read_agf(mp, tp, agno, 0, &agf_bp); + if (error) + goto out_cancel_tp; + + cur = xfs_rmapbt_init_cursor(mp, tp, agf_bp, agno); + + /* Construct a range for rmap query */ + memset(&rmap_low, 0, sizeof(rmap_low)); + memset(&rmap_high, 0xFF, sizeof(rmap_high)); + rmap_low.rm_startblock = rmap_high.rm_startblock = agbno; + rmap_low.rm_blockcount = rmap_high.rm_blockcount = bcnt; + + error = xfs_rmap_query_range(cur, &rmap_low, &rmap_high, xfs_corrupt_helper, data); + if (error == -EFSCORRUPTED) + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_META); + + xfs_btree_del_cursor(cur, error); + xfs_trans_brelse(tp, agf_bp); +out_cancel_tp: + xfs_trans_cancel(tp); + return error; +} + static const struct super_operations xfs_super_operations = { .alloc_inode = xfs_fs_alloc_inode, .destroy_inode = xfs_fs_destroy_inode, @@ -1118,6 +1226,7 @@ static const struct super_operations xfs_super_operations = { .show_options = xfs_fs_show_options, .nr_cached_objects = xfs_fs_nr_cached_objects, .free_cached_objects = xfs_fs_free_cached_objects, + .corrupted_range = xfs_fs_corrupted_range, }; static int