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/*
* Copyright (C) 2017 Oracle. All Rights Reserved.
*
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*
* 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_sb.h"
#include "xfs_alloc.h"
#include "xfs_rmap.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/btree.h"
#include "scrub/trace.h"
/*
* Set us up to scrub reference count btrees.
*/
int
xfs_scrub_setup_ag_refcountbt(
struct xfs_scrub_context *sc,
struct xfs_inode *ip)
{
return xfs_scrub_setup_ag_btree(sc, ip, false);
}
/* Reference count btree scrubber. */
/* Scrub a refcountbt record. */
STATIC int
xfs_scrub_refcountbt_rec(
struct xfs_scrub_btree *bs,
union xfs_btree_rec *rec)
{
struct xfs_mount *mp = bs->cur->bc_mp;
xfs_agnumber_t agno = bs->cur->bc_private.a.agno;
xfs_agblock_t bno;
xfs_extlen_t len;
xfs_nlink_t refcount;
bool has_cowflag;
int error = 0;
bno = be32_to_cpu(rec->refc.rc_startblock);
len = be32_to_cpu(rec->refc.rc_blockcount);
refcount = be32_to_cpu(rec->refc.rc_refcount);
/* Only CoW records can have refcount == 1. */
has_cowflag = (bno & XFS_REFC_COW_START);
if ((refcount == 1 && !has_cowflag) || (refcount != 1 && has_cowflag))
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
/* Check the extent. */
bno &= ~XFS_REFC_COW_START;
if (bno + len <= bno ||
!xfs_verify_agbno(mp, agno, bno) ||
!xfs_verify_agbno(mp, agno, bno + len - 1))
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
if (refcount == 0)
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
return error;
}
/* Scrub the refcount btree for some AG. */
int
xfs_scrub_refcountbt(
struct xfs_scrub_context *sc)
{
struct xfs_owner_info oinfo;
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_REFC);
return xfs_scrub_btree(sc, sc->sa.refc_cur, xfs_scrub_refcountbt_rec,
&oinfo, NULL);
}
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