From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:20673 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934307AbdCJXUo (ORCPT ); Fri, 10 Mar 2017 18:20:44 -0500 Subject: [PATCH 08/19] xfs: support scrubbing free space btrees From: "Darrick J. Wong" To: darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Date: Fri, 10 Mar 2017 15:20:39 -0800 Message-ID: <148918803912.6959.17532418996977401197.stgit@birch.djwong.org> In-Reply-To: <148918798893.6959.7972227235163150709.stgit@birch.djwong.org> References: <148918798893.6959.7972227235163150709.stgit@birch.djwong.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-fsdevel-owner@vger.kernel.org List-ID: From: Darrick J. Wong Check the extent records free space btrees to ensure that the values look sane. Signed-off-by: Darrick J. Wong --- fs/xfs/Makefile | 1 fs/xfs/libxfs/xfs_alloc_btree.c | 6 -- fs/xfs/libxfs/xfs_fs.h | 4 + fs/xfs/scrub/alloc.c | 114 +++++++++++++++++++++++++++++++++++++++ fs/xfs/scrub/common.c | 2 + fs/xfs/scrub/common.h | 6 ++ fs/xfs/xfs_trace.h | 4 + 7 files changed, 129 insertions(+), 8 deletions(-) create mode 100644 fs/xfs/scrub/alloc.c diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index ca7399a..3168655 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -105,6 +105,7 @@ xfs-y += xfs_aops.o \ # online scrub/repair xfs-$(CONFIG_XFS_DEBUG) += $(addprefix scrub/, \ agheader.o \ + alloc.o \ btree.o \ common.o \ ) diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c index e1fcfe7..5968a77 100644 --- a/fs/xfs/libxfs/xfs_alloc_btree.c +++ b/fs/xfs/libxfs/xfs_alloc_btree.c @@ -395,7 +395,6 @@ const struct xfs_buf_ops xfs_allocbt_buf_ops = { }; -#if defined(DEBUG) || defined(XFS_WARN) STATIC int xfs_bnobt_keys_inorder( struct xfs_btree_cur *cur, @@ -442,7 +441,6 @@ xfs_cntbt_recs_inorder( be32_to_cpu(r1->alloc.ar_startblock) < be32_to_cpu(r2->alloc.ar_startblock)); } -#endif /* DEBUG */ static const struct xfs_btree_ops xfs_bnobt_ops = { .rec_len = sizeof(xfs_alloc_rec_t), @@ -462,10 +460,8 @@ static const struct xfs_btree_ops xfs_bnobt_ops = { .key_diff = xfs_bnobt_key_diff, .buf_ops = &xfs_allocbt_buf_ops, .diff_two_keys = xfs_bnobt_diff_two_keys, -#if defined(DEBUG) || defined(XFS_WARN) .keys_inorder = xfs_bnobt_keys_inorder, .recs_inorder = xfs_bnobt_recs_inorder, -#endif }; static const struct xfs_btree_ops xfs_cntbt_ops = { @@ -486,10 +482,8 @@ static const struct xfs_btree_ops xfs_cntbt_ops = { .key_diff = xfs_cntbt_key_diff, .buf_ops = &xfs_allocbt_buf_ops, .diff_two_keys = xfs_cntbt_diff_two_keys, -#if defined(DEBUG) || defined(XFS_WARN) .keys_inorder = xfs_cntbt_keys_inorder, .recs_inorder = xfs_cntbt_recs_inorder, -#endif }; /* diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index 2253df4..6556eba 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -497,7 +497,9 @@ struct xfs_scrub_metadata { #define XFS_SCRUB_TYPE_AGF 2 /* AG free header */ #define XFS_SCRUB_TYPE_AGFL 3 /* AG free list */ #define XFS_SCRUB_TYPE_AGI 4 /* AG inode header */ -#define XFS_SCRUB_TYPE_MAX 4 +#define XFS_SCRUB_TYPE_BNOBT 5 /* freesp by block btree */ +#define XFS_SCRUB_TYPE_CNTBT 6 /* freesp by length btree */ +#define XFS_SCRUB_TYPE_MAX 6 #define XFS_SCRUB_FLAG_REPAIR 0x01 /* i: repair this metadata */ #define XFS_SCRUB_FLAG_CORRUPT 0x02 /* o: needs repair */ diff --git a/fs/xfs/scrub/alloc.c b/fs/xfs/scrub/alloc.c new file mode 100644 index 0000000..2edf85d --- /dev/null +++ b/fs/xfs/scrub/alloc.c @@ -0,0 +1,114 @@ +/* + * Copyright (C) 2017 Oracle. All Rights Reserved. + * + * Author: Darrick J. Wong + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#include "xfs.h" +#include "xfs_fs.h" +#include "xfs_shared.h" +#include "xfs_format.h" +#include "xfs_trans_resv.h" +#include "xfs_mount.h" +#include "xfs_defer.h" +#include "xfs_btree.h" +#include "xfs_bit.h" +#include "xfs_log_format.h" +#include "xfs_trans.h" +#include "xfs_trace.h" +#include "xfs_sb.h" +#include "xfs_rmap.h" +#include "scrub/common.h" +#include "scrub/btree.h" + +/* Set us up with AG headers and btree cursors. */ +int +xfs_scrub_setup_ag_header( + struct xfs_scrub_context *sc, + struct xfs_inode *ip, + struct xfs_scrub_metadata *sm, + bool retry_deadlocked) +{ + int error; + + error = xfs_scrub_setup_ag(sc, ip, sm, retry_deadlocked); + if (error) + goto out; + + error = xfs_scrub_ag_init(sc, sm->sm_agno, &sc->sa); + if (error) + xfs_trans_cancel(sc->tp); +out: + return error; +} + +/* Free space btree scrubber. */ + +/* Scrub a bnobt/cntbt record. */ +STATIC int +xfs_scrub_allocbt_helper( + struct xfs_scrub_btree *bs, + union xfs_btree_rec *rec) +{ + struct xfs_mount *mp = bs->cur->bc_mp; + struct xfs_agf *agf; + xfs_agblock_t bno; + xfs_extlen_t len; + int error = 0; + + bno = be32_to_cpu(rec->alloc.ar_startblock); + len = be32_to_cpu(rec->alloc.ar_blockcount); + agf = XFS_BUF_TO_AGF(bs->sc->sa.agf_bp); + + XFS_SCRUB_BTREC_CHECK(bs, bno < mp->m_sb.sb_agblocks); + XFS_SCRUB_BTREC_CHECK(bs, bno < be32_to_cpu(agf->agf_length)); + XFS_SCRUB_BTREC_CHECK(bs, bno < bno + len); + XFS_SCRUB_BTREC_CHECK(bs, (unsigned long long)bno + len <= + mp->m_sb.sb_agblocks); + XFS_SCRUB_BTREC_CHECK(bs, (unsigned long long)bno + len <= + be32_to_cpu(agf->agf_length)); + + return error; +} + +/* Scrub the freespace btrees for some AG. */ +STATIC int +xfs_scrub_allocbt( + struct xfs_scrub_context *sc, + xfs_btnum_t which) +{ + struct xfs_owner_info oinfo; + struct xfs_btree_cur *cur; + + xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_AG); + cur = which == XFS_BTNUM_BNO ? sc->sa.bno_cur : sc->sa.cnt_cur; + return xfs_scrub_btree(sc, cur, xfs_scrub_allocbt_helper, + &oinfo, NULL); +} + +int +xfs_scrub_bnobt( + struct xfs_scrub_context *sc) +{ + return xfs_scrub_allocbt(sc, XFS_BTNUM_BNO); +} + +int +xfs_scrub_cntbt( + struct xfs_scrub_context *sc) +{ + return xfs_scrub_allocbt(sc, XFS_BTNUM_CNT); +} diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c index 6725e36..6fee592 100644 --- a/fs/xfs/scrub/common.c +++ b/fs/xfs/scrub/common.c @@ -683,6 +683,8 @@ static const struct xfs_scrub_meta_fns meta_scrub_fns[] = { {xfs_scrub_setup_ag, xfs_scrub_agf, NULL, NULL}, {xfs_scrub_setup_ag, xfs_scrub_agfl, NULL, NULL}, {xfs_scrub_setup_ag, xfs_scrub_agi, NULL, NULL}, + {xfs_scrub_setup_ag_header, xfs_scrub_bnobt, NULL, NULL}, + {xfs_scrub_setup_ag_header, xfs_scrub_cntbt, NULL, NULL}, }; /* Dispatch metadata scrubbing. */ diff --git a/fs/xfs/scrub/common.h b/fs/xfs/scrub/common.h index e11b3fb..ab36616 100644 --- a/fs/xfs/scrub/common.h +++ b/fs/xfs/scrub/common.h @@ -204,6 +204,10 @@ int xfs_scrub_setup(struct xfs_scrub_context *sc, struct xfs_inode *ip, struct xfs_scrub_metadata *sm, bool retry_deadlocked); int xfs_scrub_setup_ag(struct xfs_scrub_context *sc, struct xfs_inode *ip, struct xfs_scrub_metadata *sm, bool retry_deadlocked); +int xfs_scrub_setup_ag_header(struct xfs_scrub_context *sc, + struct xfs_inode *ip, + struct xfs_scrub_metadata *sm, + bool retry_deadlocked); /* Metadata scrubbers */ @@ -211,5 +215,7 @@ int xfs_scrub_superblock(struct xfs_scrub_context *sc); int xfs_scrub_agf(struct xfs_scrub_context *sc); int xfs_scrub_agfl(struct xfs_scrub_context *sc); int xfs_scrub_agi(struct xfs_scrub_context *sc); +int xfs_scrub_bnobt(struct xfs_scrub_context *sc); +int xfs_scrub_cntbt(struct xfs_scrub_context *sc); #endif /* __XFS_REPAIR_COMMON_H__ */ diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 56e0447..e8a7c34 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -3358,7 +3358,9 @@ DEFINE_GETFSMAP_EVENT(xfs_getfsmap_mapping); { XFS_SCRUB_TYPE_SB, "superblock" }, \ { XFS_SCRUB_TYPE_AGF, "AGF" }, \ { XFS_SCRUB_TYPE_AGFL, "AGFL" }, \ - { XFS_SCRUB_TYPE_AGI, "AGI" } + { XFS_SCRUB_TYPE_AGI, "AGI" }, \ + { XFS_SCRUB_TYPE_BNOBT, "bnobt" }, \ + { XFS_SCRUB_TYPE_CNTBT, "cntbt" } DECLARE_EVENT_CLASS(xfs_scrub_class, TP_PROTO(struct xfs_inode *ip, struct xfs_scrub_metadata *sm, int error),