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100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
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/*
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* Copyright (C) 2017 Oracle. All Rights Reserved.
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*
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_defer.h"
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#include "xfs_btree.h"
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#include "xfs_bit.h"
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#include "xfs_log_format.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_alloc.h"
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#include "xfs_rmap.h"
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#include "scrub/xfs_scrub.h"
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#include "scrub/scrub.h"
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#include "scrub/common.h"
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#include "scrub/btree.h"
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#include "scrub/trace.h"
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/*
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* Set us up to scrub reference count btrees.
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*/
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int
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xfs_scrub_setup_ag_refcountbt(
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struct xfs_scrub_context *sc,
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struct xfs_inode *ip)
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{
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return xfs_scrub_setup_ag_btree(sc, ip, false);
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}
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/* Reference count btree scrubber. */
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/* Scrub a refcountbt record. */
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STATIC int
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xfs_scrub_refcountbt_rec(
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struct xfs_scrub_btree *bs,
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union xfs_btree_rec *rec)
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{
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struct xfs_mount *mp = bs->cur->bc_mp;
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xfs_agnumber_t agno = bs->cur->bc_private.a.agno;
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xfs_agblock_t bno;
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xfs_extlen_t len;
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xfs_nlink_t refcount;
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bool has_cowflag;
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int error = 0;
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bno = be32_to_cpu(rec->refc.rc_startblock);
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len = be32_to_cpu(rec->refc.rc_blockcount);
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refcount = be32_to_cpu(rec->refc.rc_refcount);
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/* Only CoW records can have refcount == 1. */
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has_cowflag = (bno & XFS_REFC_COW_START);
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if ((refcount == 1 && !has_cowflag) || (refcount != 1 && has_cowflag))
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xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
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/* Check the extent. */
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bno &= ~XFS_REFC_COW_START;
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if (bno + len <= bno ||
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!xfs_verify_agbno(mp, agno, bno) ||
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!xfs_verify_agbno(mp, agno, bno + len - 1))
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xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
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if (refcount == 0)
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xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
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return error;
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}
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/* Scrub the refcount btree for some AG. */
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int
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xfs_scrub_refcountbt(
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struct xfs_scrub_context *sc)
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{
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struct xfs_owner_info oinfo;
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xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_REFC);
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return xfs_scrub_btree(sc, sc->sa.refc_cur, xfs_scrub_refcountbt_rec,
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&oinfo, NULL);
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}
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