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35e3b9a117
Create a xfs_alloc_btrec_to_irec function to convert an ondisk record to an incore record, and a xfs_alloc_check_irec function to detect corruption. Replace all the open-coded logic with calls to the new helpers and bubble up corruption reports. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com>
159 lines
3.3 KiB
C
159 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2017-2023 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <djwong@kernel.org>
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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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#include "xfs_ag.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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{
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if (xchk_need_intent_drain(sc))
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xchk_fsgates_enable(sc, XCHK_FSGATES_DRAIN);
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return xchk_setup_ag_btree(sc, 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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const struct xfs_alloc_rec_incore *irec)
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{
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xfs_agblock_t agbno = irec->ar_startblock;
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xfs_extlen_t len = irec->ar_blockcount;
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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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const union xfs_btree_rec *rec)
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{
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struct xfs_alloc_rec_incore irec;
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xfs_alloc_btrec_to_irec(rec, &irec);
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if (xfs_alloc_check_irec(bs->cur, &irec) != NULL) {
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xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
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return 0;
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}
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xchk_allocbt_xref(bs->sc, &irec);
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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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