1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2017 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_trans_resv.h"
11 #include "xfs_mount.h"
12 #include "xfs_defer.h"
13 #include "xfs_btree.h"
15 #include "xfs_log_format.h"
16 #include "xfs_trans.h"
18 #include "xfs_alloc.h"
20 #include "xfs_alloc.h"
21 #include "scrub/xfs_scrub.h"
22 #include "scrub/scrub.h"
23 #include "scrub/common.h"
24 #include "scrub/btree.h"
25 #include "scrub/trace.h"
28 * Set us up to scrub free space btrees.
31 xfs_scrub_setup_ag_allocbt(
32 struct xfs_scrub_context *sc,
35 return xfs_scrub_setup_ag_btree(sc, ip, false);
38 /* Free space btree scrubber. */
40 * Ensure there's a corresponding cntbt/bnobt record matching this
41 * bnobt/cntbt record, respectively.
44 xfs_scrub_allocbt_xref_other(
45 struct xfs_scrub_context *sc,
49 struct xfs_btree_cur **pcur;
55 if (sc->sm->sm_type == XFS_SCRUB_TYPE_BNOBT)
56 pcur = &sc->sa.cnt_cur;
58 pcur = &sc->sa.bno_cur;
59 if (!*pcur || xfs_scrub_skip_xref(sc->sm))
62 error = xfs_alloc_lookup_le(*pcur, agbno, len, &has_otherrec);
63 if (!xfs_scrub_should_check_xref(sc, &error, pcur))
66 xfs_scrub_btree_xref_set_corrupt(sc, *pcur, 0);
70 error = xfs_alloc_get_rec(*pcur, &fbno, &flen, &has_otherrec);
71 if (!xfs_scrub_should_check_xref(sc, &error, pcur))
74 xfs_scrub_btree_xref_set_corrupt(sc, *pcur, 0);
78 if (fbno != agbno || flen != len)
79 xfs_scrub_btree_xref_set_corrupt(sc, *pcur, 0);
82 /* Cross-reference with the other btrees. */
84 xfs_scrub_allocbt_xref(
85 struct xfs_scrub_context *sc,
89 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
92 xfs_scrub_allocbt_xref_other(sc, agbno, len);
93 xfs_scrub_xref_is_not_inode_chunk(sc, agbno, len);
94 xfs_scrub_xref_has_no_owner(sc, agbno, len);
95 xfs_scrub_xref_is_not_shared(sc, agbno, len);
98 /* Scrub a bnobt/cntbt record. */
100 xfs_scrub_allocbt_rec(
101 struct xfs_scrub_btree *bs,
102 union xfs_btree_rec *rec)
104 struct xfs_mount *mp = bs->cur->bc_mp;
105 xfs_agnumber_t agno = bs->cur->bc_private.a.agno;
110 bno = be32_to_cpu(rec->alloc.ar_startblock);
111 len = be32_to_cpu(rec->alloc.ar_blockcount);
113 if (bno + len <= bno ||
114 !xfs_verify_agbno(mp, agno, bno) ||
115 !xfs_verify_agbno(mp, agno, bno + len - 1))
116 xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
118 xfs_scrub_allocbt_xref(bs->sc, bno, len);
123 /* Scrub the freespace btrees for some AG. */
126 struct xfs_scrub_context *sc,
129 struct xfs_owner_info oinfo;
130 struct xfs_btree_cur *cur;
132 xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_AG);
133 cur = which == XFS_BTNUM_BNO ? sc->sa.bno_cur : sc->sa.cnt_cur;
134 return xfs_scrub_btree(sc, cur, xfs_scrub_allocbt_rec, &oinfo, NULL);
139 struct xfs_scrub_context *sc)
141 return xfs_scrub_allocbt(sc, XFS_BTNUM_BNO);
146 struct xfs_scrub_context *sc)
148 return xfs_scrub_allocbt(sc, XFS_BTNUM_CNT);
151 /* xref check that the extent is not free */
153 xfs_scrub_xref_is_used_space(
154 struct xfs_scrub_context *sc,
161 if (!sc->sa.bno_cur || xfs_scrub_skip_xref(sc->sm))
164 error = xfs_alloc_has_record(sc->sa.bno_cur, agbno, len, &is_freesp);
165 if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.bno_cur))
168 xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.bno_cur, 0);