mirror of
https://github.com/torvalds/linux.git
synced 2024-11-23 04:31:50 +00:00
c7e693d983
Check the reverse mapping records to make sure that the contents make sense. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
139 lines
3.9 KiB
C
139 lines
3.9 KiB
C
/*
|
|
* 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_ialloc.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 reverse mapping btrees.
|
|
*/
|
|
int
|
|
xfs_scrub_setup_ag_rmapbt(
|
|
struct xfs_scrub_context *sc,
|
|
struct xfs_inode *ip)
|
|
{
|
|
return xfs_scrub_setup_ag_btree(sc, ip, false);
|
|
}
|
|
|
|
/* Reverse-mapping scrubber. */
|
|
|
|
/* Scrub an rmapbt record. */
|
|
STATIC int
|
|
xfs_scrub_rmapbt_rec(
|
|
struct xfs_scrub_btree *bs,
|
|
union xfs_btree_rec *rec)
|
|
{
|
|
struct xfs_mount *mp = bs->cur->bc_mp;
|
|
struct xfs_rmap_irec irec;
|
|
xfs_agnumber_t agno = bs->cur->bc_private.a.agno;
|
|
bool non_inode;
|
|
bool is_unwritten;
|
|
bool is_bmbt;
|
|
bool is_attr;
|
|
int error;
|
|
|
|
error = xfs_rmap_btrec_to_irec(rec, &irec);
|
|
if (!xfs_scrub_btree_process_error(bs->sc, bs->cur, 0, &error))
|
|
goto out;
|
|
|
|
/* Check extent. */
|
|
if (irec.rm_startblock + irec.rm_blockcount <= irec.rm_startblock)
|
|
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
|
|
|
|
if (irec.rm_owner == XFS_RMAP_OWN_FS) {
|
|
/*
|
|
* xfs_verify_agbno returns false for static fs metadata.
|
|
* Since that only exists at the start of the AG, validate
|
|
* that by hand.
|
|
*/
|
|
if (irec.rm_startblock != 0 ||
|
|
irec.rm_blockcount != XFS_AGFL_BLOCK(mp) + 1)
|
|
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
|
|
} else {
|
|
/*
|
|
* Otherwise we must point somewhere past the static metadata
|
|
* but before the end of the FS. Run the regular check.
|
|
*/
|
|
if (!xfs_verify_agbno(mp, agno, irec.rm_startblock) ||
|
|
!xfs_verify_agbno(mp, agno, irec.rm_startblock +
|
|
irec.rm_blockcount - 1))
|
|
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
|
|
}
|
|
|
|
/* Check flags. */
|
|
non_inode = XFS_RMAP_NON_INODE_OWNER(irec.rm_owner);
|
|
is_bmbt = irec.rm_flags & XFS_RMAP_BMBT_BLOCK;
|
|
is_attr = irec.rm_flags & XFS_RMAP_ATTR_FORK;
|
|
is_unwritten = irec.rm_flags & XFS_RMAP_UNWRITTEN;
|
|
|
|
if (is_bmbt && irec.rm_offset != 0)
|
|
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
|
|
|
|
if (non_inode && irec.rm_offset != 0)
|
|
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
|
|
|
|
if (is_unwritten && (is_bmbt || non_inode || is_attr))
|
|
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
|
|
|
|
if (non_inode && (is_bmbt || is_unwritten || is_attr))
|
|
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
|
|
|
|
if (!non_inode) {
|
|
if (!xfs_verify_ino(mp, irec.rm_owner))
|
|
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
|
|
} else {
|
|
/* Non-inode owner within the magic values? */
|
|
if (irec.rm_owner <= XFS_RMAP_OWN_MIN ||
|
|
irec.rm_owner > XFS_RMAP_OWN_FS)
|
|
xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
|
|
}
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
/* Scrub the rmap btree for some AG. */
|
|
int
|
|
xfs_scrub_rmapbt(
|
|
struct xfs_scrub_context *sc)
|
|
{
|
|
struct xfs_owner_info oinfo;
|
|
|
|
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_AG);
|
|
return xfs_scrub_btree(sc, sc->sa.rmap_cur, xfs_scrub_rmapbt_rec,
|
|
&oinfo, NULL);
|
|
}
|