| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2017 Oracle. All Rights Reserved. |
| * Author: Darrick J. Wong <darrick.wong@oracle.com> |
| */ |
| #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_btree.h" |
| #include "xfs_alloc.h" |
| #include "xfs_rmap.h" |
| #include "scrub/scrub.h" |
| #include "scrub/common.h" |
| #include "scrub/btree.h" |
| |
| /* |
| * Set us up to scrub free space btrees. |
| */ |
| int |
| xchk_setup_ag_allocbt( |
| struct xfs_scrub *sc, |
| struct xfs_inode *ip) |
| { |
| return xchk_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 |
| xchk_allocbt_xref_other( |
| struct xfs_scrub *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 || xchk_skip_xref(sc->sm)) |
| return; |
| |
| error = xfs_alloc_lookup_le(*pcur, agbno, len, &has_otherrec); |
| if (!xchk_should_check_xref(sc, &error, pcur)) |
| return; |
| if (!has_otherrec) { |
| xchk_btree_xref_set_corrupt(sc, *pcur, 0); |
| return; |
| } |
| |
| error = xfs_alloc_get_rec(*pcur, &fbno, &flen, &has_otherrec); |
| if (!xchk_should_check_xref(sc, &error, pcur)) |
| return; |
| if (!has_otherrec) { |
| xchk_btree_xref_set_corrupt(sc, *pcur, 0); |
| return; |
| } |
| |
| if (fbno != agbno || flen != len) |
| xchk_btree_xref_set_corrupt(sc, *pcur, 0); |
| } |
| |
| /* Cross-reference with the other btrees. */ |
| STATIC void |
| xchk_allocbt_xref( |
| struct xfs_scrub *sc, |
| xfs_agblock_t agbno, |
| xfs_extlen_t len) |
| { |
| if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT) |
| return; |
| |
| xchk_allocbt_xref_other(sc, agbno, len); |
| xchk_xref_is_not_inode_chunk(sc, agbno, len); |
| xchk_xref_has_no_owner(sc, agbno, len); |
| xchk_xref_is_not_shared(sc, agbno, len); |
| } |
| |
| /* Scrub a bnobt/cntbt record. */ |
| STATIC int |
| xchk_allocbt_rec( |
| struct xchk_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)) |
| xchk_btree_set_corrupt(bs->sc, bs->cur, 0); |
| |
| xchk_allocbt_xref(bs->sc, bno, len); |
| |
| return error; |
| } |
| |
| /* Scrub the freespace btrees for some AG. */ |
| STATIC int |
| xchk_allocbt( |
| struct xfs_scrub *sc, |
| xfs_btnum_t which) |
| { |
| struct xfs_btree_cur *cur; |
| |
| cur = which == XFS_BTNUM_BNO ? sc->sa.bno_cur : sc->sa.cnt_cur; |
| return xchk_btree(sc, cur, xchk_allocbt_rec, &XFS_RMAP_OINFO_AG, NULL); |
| } |
| |
| int |
| xchk_bnobt( |
| struct xfs_scrub *sc) |
| { |
| return xchk_allocbt(sc, XFS_BTNUM_BNO); |
| } |
| |
| int |
| xchk_cntbt( |
| struct xfs_scrub *sc) |
| { |
| return xchk_allocbt(sc, XFS_BTNUM_CNT); |
| } |
| |
| /* xref check that the extent is not free */ |
| void |
| xchk_xref_is_used_space( |
| struct xfs_scrub *sc, |
| xfs_agblock_t agbno, |
| xfs_extlen_t len) |
| { |
| bool is_freesp; |
| int error; |
| |
| if (!sc->sa.bno_cur || xchk_skip_xref(sc->sm)) |
| return; |
| |
| error = xfs_alloc_has_record(sc->sa.bno_cur, agbno, len, &is_freesp); |
| if (!xchk_should_check_xref(sc, &error, &sc->sa.bno_cur)) |
| return; |
| if (is_freesp) |
| xchk_btree_xref_set_corrupt(sc, sc->sa.bno_cur, 0); |
| } |