diff options
Diffstat (limited to 'fs/xfs/scrub/alloc.c')
| -rw-r--r-- | fs/xfs/scrub/alloc.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/fs/xfs/scrub/alloc.c b/fs/xfs/scrub/alloc.c new file mode 100644 index 000000000000..517c079d3f68 --- /dev/null +++ b/fs/xfs/scrub/alloc.c @@ -0,0 +1,183 @@ +/* + * 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 "xfs_alloc.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 free space btrees. + */ +int +xfs_scrub_setup_ag_allocbt( + struct xfs_scrub_context *sc, + struct xfs_inode *ip) +{ + return xfs_scrub_setup_ag_btree(sc, ip, false); +} + +/* Free space btree scrubber. */ +/* + * Ensure there's a corresponding cntbt/bnobt record matching this + * bnobt/cntbt record, respectively. + */ +STATIC void +xfs_scrub_allocbt_xref_other( + struct xfs_scrub_context *sc, + xfs_agblock_t agbno, + xfs_extlen_t len) +{ + struct xfs_btree_cur **pcur; + xfs_agblock_t fbno; + xfs_extlen_t flen; + int has_otherrec; + int error; + + if (sc->sm->sm_type == XFS_SCRUB_TYPE_BNOBT) + pcur = &sc->sa.cnt_cur; + else + pcur = &sc->sa.bno_cur; + if (!*pcur) + return; + + error = xfs_alloc_lookup_le(*pcur, agbno, len, &has_otherrec); + if (!xfs_scrub_should_check_xref(sc, &error, pcur)) + return; + if (!has_otherrec) { + xfs_scrub_btree_xref_set_corrupt(sc, *pcur, 0); + return; + } + + error = xfs_alloc_get_rec(*pcur, &fbno, &flen, &has_otherrec); + if (!xfs_scrub_should_check_xref(sc, &error, pcur)) + return; + if (!has_otherrec) { + xfs_scrub_btree_xref_set_corrupt(sc, *pcur, 0); + return; + } + + if (fbno != agbno || flen != len) + xfs_scrub_btree_xref_set_corrupt(sc, *pcur, 0); +} + +/* Cross-reference with the other btrees. */ +STATIC void +xfs_scrub_allocbt_xref( + struct xfs_scrub_context *sc, + xfs_agblock_t agbno, + xfs_extlen_t len) +{ + if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT) + return; + + xfs_scrub_allocbt_xref_other(sc, agbno, len); + xfs_scrub_xref_is_not_inode_chunk(sc, agbno, len); + xfs_scrub_xref_has_no_owner(sc, agbno, len); + xfs_scrub_xref_is_not_shared(sc, agbno, len); +} + +/* Scrub a bnobt/cntbt record. */ +STATIC int +xfs_scrub_allocbt_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; + int error = 0; + + bno = be32_to_cpu(rec->alloc.ar_startblock); + len = be32_to_cpu(rec->alloc.ar_blockcount); + + 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); + + xfs_scrub_allocbt_xref(bs->sc, bno, len); + + 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_rec, &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); +} + +/* xref check that the extent is not free */ +void +xfs_scrub_xref_is_used_space( + struct xfs_scrub_context *sc, + xfs_agblock_t agbno, + xfs_extlen_t len) +{ + bool is_freesp; + int error; + + if (!sc->sa.bno_cur) + return; + + error = xfs_alloc_has_record(sc->sa.bno_cur, agbno, len, &is_freesp); + if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.bno_cur)) + return; + if (is_freesp) + xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.bno_cur, 0); +} |