1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
// 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"
#include "xfs_ag.h"
/*
* Set us up to scrub free space btrees.
*/
int
xchk_setup_ag_allocbt(
struct xfs_scrub *sc)
{
return xchk_setup_ag_btree(sc, 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,
const union xfs_btree_rec *rec)
{
struct xfs_perag *pag = bs->cur->bc_ag.pag;
xfs_agblock_t bno;
xfs_extlen_t len;
bno = be32_to_cpu(rec->alloc.ar_startblock);
len = be32_to_cpu(rec->alloc.ar_blockcount);
if (!xfs_verify_agbext(pag, bno, len))
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
xchk_allocbt_xref(bs->sc, bno, len);
return 0;
}
/* 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);
}
|
