From patchwork Sat Jan 21 08:05:25 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 9529997 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 57ACD6020B for ; Sat, 21 Jan 2017 08:05:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4732228427 for ; Sat, 21 Jan 2017 08:05:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3C0EC28698; Sat, 21 Jan 2017 08:05:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8FD2128427 for ; Sat, 21 Jan 2017 08:05:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751045AbdAUIFa (ORCPT ); Sat, 21 Jan 2017 03:05:30 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:20047 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750836AbdAUIFa (ORCPT ); Sat, 21 Jan 2017 03:05:30 -0500 Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v0L85TEL015243 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 21 Jan 2017 08:05:29 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id v0L85SMR025698 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sat, 21 Jan 2017 08:05:28 GMT Received: from abhmp0018.oracle.com (abhmp0018.oracle.com [141.146.116.24]) by aserv0121.oracle.com (8.13.8/8.13.8) with ESMTP id v0L85QC8002915; Sat, 21 Jan 2017 08:05:27 GMT Received: from localhost (/24.21.211.40) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sat, 21 Jan 2017 00:05:26 -0800 Subject: [PATCH 47/55] xfs: rebuild the AGI From: "Darrick J. Wong" To: darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Date: Sat, 21 Jan 2017 00:05:25 -0800 Message-ID: <148498592507.15323.8403871751302815121.stgit@birch.djwong.org> In-Reply-To: <148498561504.15323.8531512066874274553.stgit@birch.djwong.org> References: <148498561504.15323.8531512066874274553.stgit@birch.djwong.org> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Source-IP: userv0022.oracle.com [156.151.31.74] Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Rebuild the AGI header items with some help from the rmapbt. Signed-off-by: Darrick J. Wong --- fs/xfs/scrub/agheader.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++ fs/xfs/scrub/common.c | 2 - fs/xfs/scrub/common.h | 1 3 files changed, 100 insertions(+), 1 deletion(-) -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c index 6916933..f3ae4e0 100644 --- a/fs/xfs/scrub/agheader.c +++ b/fs/xfs/scrub/agheader.c @@ -1337,3 +1337,101 @@ xfs_scrub_agi( #undef XFS_SCRUB_AGI_XCHECK #undef XFS_SCRUB_AGI_CHECK #undef XFS_SCRUB_AGI_OP_ERROR_GOTO + +/* Repair the AGI. */ +int +xfs_repair_agi( + struct xfs_scrub_context *sc) +{ + struct xfs_repair_find_ag_btree fab[] = { + {XFS_RMAP_OWN_INOBT, &xfs_inobt_buf_ops, XFS_IBT_CRC_MAGIC, 0, 0}, + {XFS_RMAP_OWN_INOBT, &xfs_inobt_buf_ops, XFS_FIBT_CRC_MAGIC, 0, 0}, + {0, NULL, 0, 0, 0}, + }; + struct xfs_agi old_agi; + struct xfs_mount *mp = sc->tp->t_mountp; + struct xfs_buf *agi_bp; + struct xfs_buf *agf_bp; + struct xfs_agi *agi; + struct xfs_btree_cur *cur; + struct xfs_perag *pag; + xfs_agino_t old_count; + xfs_agino_t old_freecount; + xfs_agino_t count; + xfs_agino_t freecount; + int bucket; + int error; + + /* We require the rmapbt to rebuild anything. */ + if (!xfs_sb_version_hasrmapbt(&mp->m_sb)) + return -EOPNOTSUPP; + + error = xfs_trans_read_buf(mp, sc->tp, mp->m_ddev_targp, + XFS_AG_DADDR(mp, sc->sa.agno, XFS_AGI_DADDR(mp)), + XFS_FSS_TO_BB(mp, 1), 0, &agi_bp, NULL); + if (error) + return error; + agi_bp->b_ops = &xfs_agi_buf_ops; + + error = xfs_alloc_read_agf(mp, sc->tp, sc->sa.agno, 0, &agf_bp); + if (error) + return error; + + /* Find the btree roots. */ + error = xfs_repair_find_ag_btree_roots(sc, agf_bp, fab); + if (error) + return error; + if (fab[0].root == NULLAGBLOCK || fab[0].level > XFS_BTREE_MAXLEVELS) + return -EFSCORRUPTED; + if (xfs_sb_version_hasfinobt(&mp->m_sb) && + (fab[1].root == NULLAGBLOCK || fab[1].level > XFS_BTREE_MAXLEVELS)) + return -EFSCORRUPTED; + + /* Start rewriting the header. */ + agi = XFS_BUF_TO_AGI(agi_bp); + old_agi = *agi; + old_count = be32_to_cpu(old_agi.agi_count); + old_freecount = be32_to_cpu(old_agi.agi_freecount); + memset(agi, 0, mp->m_sb.sb_sectsize); + agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); + agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); + agi->agi_seqno = cpu_to_be32(sc->sa.agno); + agi->agi_length = cpu_to_be32(xfs_scrub_ag_blocks(mp, sc->sa.agno)); + agi->agi_newino = cpu_to_be32(NULLAGINO); + agi->agi_dirino = cpu_to_be32(NULLAGINO); + if (xfs_sb_version_hascrc(&mp->m_sb)) + uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid); + for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) + agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); + agi->agi_root = cpu_to_be32(fab[0].root); + agi->agi_level = cpu_to_be32(fab[0].level); + if (xfs_sb_version_hasfinobt(&mp->m_sb)) { + agi->agi_free_root = cpu_to_be32(fab[1].root); + agi->agi_free_level = cpu_to_be32(fab[1].level); + } + + /* Update the AGI counters. */ + cur = xfs_inobt_init_cursor(mp, sc->tp, agi_bp, sc->sa.agno, + XFS_BTNUM_INO); + error = xfs_ialloc_count_inodes(cur, &count, &freecount); + xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); + if (error) + goto err; + agi->agi_count = cpu_to_be32(count); + agi->agi_freecount = cpu_to_be32(freecount); + if (old_count != count || old_freecount != freecount) { + pag = xfs_perag_get(mp, sc->sa.agno); + pag->pagi_init = 0; + xfs_perag_put(pag); + sc->reset_counters = true; + } + + /* Write this to disk. */ + xfs_trans_buf_set_type(sc->tp, agi_bp, XFS_BLFT_AGI_BUF); + xfs_trans_log_buf(sc->tp, agi_bp, 0, mp->m_sb.sb_sectsize - 1); + return error; + +err: + *agi = old_agi; + return error; +} diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c index 4abb504..ceaa528 100644 --- a/fs/xfs/scrub/common.c +++ b/fs/xfs/scrub/common.c @@ -764,7 +764,7 @@ static const struct xfs_scrub_meta_fns meta_scrub_fns[] = { {xfs_scrub_setup_ag, xfs_scrub_superblock, xfs_repair_superblock, NULL}, {xfs_scrub_setup_ag, xfs_scrub_agf, xfs_repair_agf, NULL}, {xfs_scrub_setup_ag, xfs_scrub_agfl, xfs_repair_agfl, NULL}, - {xfs_scrub_setup_ag, xfs_scrub_agi, NULL, NULL}, + {xfs_scrub_setup_ag, xfs_scrub_agi, xfs_repair_agi, NULL}, {xfs_scrub_setup_ag_header, xfs_scrub_bnobt, NULL, NULL}, {xfs_scrub_setup_ag_header, xfs_scrub_cntbt, NULL, NULL}, {xfs_scrub_setup_ag_iallocbt, xfs_scrub_inobt, NULL, NULL}, diff --git a/fs/xfs/scrub/common.h b/fs/xfs/scrub/common.h index aa7049b..e23a22a 100644 --- a/fs/xfs/scrub/common.h +++ b/fs/xfs/scrub/common.h @@ -377,5 +377,6 @@ xfs_extlen_t xfs_repair_calc_ag_resblks(struct xfs_scrub_context *sc, int xfs_repair_superblock(struct xfs_scrub_context *sc); int xfs_repair_agf(struct xfs_scrub_context *sc); int xfs_repair_agfl(struct xfs_scrub_context *sc); +int xfs_repair_agi(struct xfs_scrub_context *sc); #endif /* __XFS_REPAIR_COMMON_H__ */