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https://github.com/torvalds/linux
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026f57ebe1
Now that the scrub context stores a pointer to the file that was used to invoke the scrub call, the struct xfs_inode pointer that we passed to all the setup functions is no longer necessary. This is only ever used if the caller wants us to scrub the metadata of the open file. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
158 lines
3.3 KiB
C
158 lines
3.3 KiB
C
// 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 <darrick.wong@oracle.com>
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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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{
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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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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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