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158 lines
3.4 KiB
158 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2017 Oracle. All Rights Reserved. |
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* Author: Darrick J. Wong <[email protected]> |
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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_btree.h" |
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#include "xfs_alloc.h" |
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#include "xfs_rmap.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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/* |
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* Set us up to scrub free space btrees. |
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*/ |
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int |
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xchk_setup_ag_allocbt( |
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struct xfs_scrub *sc, |
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struct xfs_inode *ip) |
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{ |
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return xchk_setup_ag_btree(sc, ip, false); |
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} |
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/* Free space btree scrubber. */ |
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/* |
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* Ensure there's a corresponding cntbt/bnobt record matching this |
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* bnobt/cntbt record, respectively. |
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*/ |
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STATIC void |
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xchk_allocbt_xref_other( |
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struct xfs_scrub *sc, |
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xfs_agblock_t agbno, |
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xfs_extlen_t len) |
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{ |
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struct xfs_btree_cur **pcur; |
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xfs_agblock_t fbno; |
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xfs_extlen_t flen; |
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int has_otherrec; |
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int error; |
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if (sc->sm->sm_type == XFS_SCRUB_TYPE_BNOBT) |
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pcur = &sc->sa.cnt_cur; |
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else |
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pcur = &sc->sa.bno_cur; |
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if (!*pcur || xchk_skip_xref(sc->sm)) |
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return; |
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error = xfs_alloc_lookup_le(*pcur, agbno, len, &has_otherrec); |
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if (!xchk_should_check_xref(sc, &error, pcur)) |
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return; |
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if (!has_otherrec) { |
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xchk_btree_xref_set_corrupt(sc, *pcur, 0); |
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return; |
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} |
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error = xfs_alloc_get_rec(*pcur, &fbno, &flen, &has_otherrec); |
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if (!xchk_should_check_xref(sc, &error, pcur)) |
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return; |
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if (!has_otherrec) { |
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xchk_btree_xref_set_corrupt(sc, *pcur, 0); |
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return; |
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} |
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if (fbno != agbno || flen != len) |
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xchk_btree_xref_set_corrupt(sc, *pcur, 0); |
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} |
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/* Cross-reference with the other btrees. */ |
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STATIC void |
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xchk_allocbt_xref( |
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struct xfs_scrub *sc, |
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xfs_agblock_t agbno, |
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xfs_extlen_t len) |
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{ |
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if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT) |
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return; |
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xchk_allocbt_xref_other(sc, agbno, len); |
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xchk_xref_is_not_inode_chunk(sc, agbno, len); |
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xchk_xref_has_no_owner(sc, agbno, len); |
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xchk_xref_is_not_shared(sc, agbno, len); |
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} |
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/* Scrub a bnobt/cntbt record. */ |
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STATIC int |
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xchk_allocbt_rec( |
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struct xchk_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_ag.agno; |
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xfs_agblock_t bno; |
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xfs_extlen_t len; |
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bno = be32_to_cpu(rec->alloc.ar_startblock); |
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len = be32_to_cpu(rec->alloc.ar_blockcount); |
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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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xchk_btree_set_corrupt(bs->sc, bs->cur, 0); |
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xchk_allocbt_xref(bs->sc, bno, len); |
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return 0; |
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} |
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/* Scrub the freespace btrees for some AG. */ |
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STATIC int |
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xchk_allocbt( |
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struct xfs_scrub *sc, |
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xfs_btnum_t which) |
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{ |
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struct xfs_btree_cur *cur; |
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cur = which == XFS_BTNUM_BNO ? sc->sa.bno_cur : sc->sa.cnt_cur; |
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return xchk_btree(sc, cur, xchk_allocbt_rec, &XFS_RMAP_OINFO_AG, NULL); |
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} |
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int |
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xchk_bnobt( |
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struct xfs_scrub *sc) |
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{ |
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return xchk_allocbt(sc, XFS_BTNUM_BNO); |
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} |
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int |
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xchk_cntbt( |
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struct xfs_scrub *sc) |
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{ |
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return xchk_allocbt(sc, XFS_BTNUM_CNT); |
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} |
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/* xref check that the extent is not free */ |
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void |
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xchk_xref_is_used_space( |
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struct xfs_scrub *sc, |
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xfs_agblock_t agbno, |
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xfs_extlen_t len) |
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{ |
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bool is_freesp; |
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int error; |
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if (!sc->sa.bno_cur || xchk_skip_xref(sc->sm)) |
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return; |
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error = xfs_alloc_has_record(sc->sa.bno_cur, agbno, len, &is_freesp); |
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if (!xchk_should_check_xref(sc, &error, &sc->sa.bno_cur)) |
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return; |
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if (is_freesp) |
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xchk_btree_xref_set_corrupt(sc, sc->sa.bno_cur, 0); |
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}
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