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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
// 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_log_format.h"
#include "xfs_trans.h"
#include "xfs_rtalloc.h"
#include "xfs_inode.h"
#include "xfs_bmap.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
/* Set us up with the realtime metadata locked. */
int
xchk_setup_rt(
struct xfs_scrub *sc)
{
int error;
error = xchk_setup_fs(sc);
if (error)
return error;
sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP;
sc->ip = sc->mp->m_rbmip;
xfs_ilock(sc->ip, sc->ilock_flags);
return 0;
}
/* Realtime bitmap. */
/* Scrub a free extent record from the realtime bitmap. */
STATIC int
xchk_rtbitmap_rec(
struct xfs_trans *tp,
struct xfs_rtalloc_rec *rec,
void *priv)
{
struct xfs_scrub *sc = priv;
xfs_rtblock_t startblock;
xfs_rtblock_t blockcount;
startblock = rec->ar_startext * tp->t_mountp->m_sb.sb_rextsize;
blockcount = rec->ar_extcount * tp->t_mountp->m_sb.sb_rextsize;
if (!xfs_verify_rtext(sc->mp, startblock, blockcount))
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
return 0;
}
/* Make sure the entire rtbitmap file is mapped with written extents. */
STATIC int
xchk_rtbitmap_check_extents(
struct xfs_scrub *sc)
{
struct xfs_mount *mp = sc->mp;
struct xfs_bmbt_irec map;
xfs_rtblock_t off;
int nmap;
int error = 0;
for (off = 0; off < mp->m_sb.sb_rbmblocks;) {
if (xchk_should_terminate(sc, &error) ||
(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
break;
/* Make sure we have a written extent. */
nmap = 1;
error = xfs_bmapi_read(mp->m_rbmip, off,
mp->m_sb.sb_rbmblocks - off, &map, &nmap,
XFS_DATA_FORK);
if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, off, &error))
break;
if (nmap != 1 || !xfs_bmap_is_written_extent(&map)) {
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, off);
break;
}
off += map.br_blockcount;
}
return error;
}
/* Scrub the realtime bitmap. */
int
xchk_rtbitmap(
struct xfs_scrub *sc)
{
int error;
/* Is the size of the rtbitmap correct? */
if (sc->mp->m_rbmip->i_disk_size !=
XFS_FSB_TO_B(sc->mp, sc->mp->m_sb.sb_rbmblocks)) {
xchk_ino_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
return 0;
}
/* Invoke the fork scrubber. */
error = xchk_metadata_inode_forks(sc);
if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
return error;
error = xchk_rtbitmap_check_extents(sc);
if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
return error;
error = xfs_rtalloc_query_all(sc->tp, xchk_rtbitmap_rec, sc);
if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
goto out;
out:
return error;
}
/* Scrub the realtime summary. */
int
xchk_rtsummary(
struct xfs_scrub *sc)
{
struct xfs_inode *rsumip = sc->mp->m_rsumip;
struct xfs_inode *old_ip = sc->ip;
uint old_ilock_flags = sc->ilock_flags;
int error = 0;
/*
* We ILOCK'd the rt bitmap ip in the setup routine, now lock the
* rt summary ip in compliance with the rt inode locking rules.
*
* Since we switch sc->ip to rsumip we have to save the old ilock
* flags so that we don't mix up the inode state that @sc tracks.
*/
sc->ip = rsumip;
sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM;
xfs_ilock(sc->ip, sc->ilock_flags);
/* Invoke the fork scrubber. */
error = xchk_metadata_inode_forks(sc);
if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
goto out;
/* XXX: implement this some day */
xchk_set_incomplete(sc);
out:
/* Switch back to the rtbitmap inode and lock flags. */
xfs_iunlock(sc->ip, sc->ilock_flags);
sc->ilock_flags = old_ilock_flags;
sc->ip = old_ip;
return error;
}
/* xref check that the extent is not free in the rtbitmap */
void
xchk_xref_is_used_rt_space(
struct xfs_scrub *sc,
xfs_rtblock_t fsbno,
xfs_extlen_t len)
{
xfs_rtblock_t startext;
xfs_rtblock_t endext;
xfs_rtblock_t extcount;
bool is_free;
int error;
if (xchk_skip_xref(sc->sm))
return;
startext = fsbno;
endext = fsbno + len - 1;
do_div(startext, sc->mp->m_sb.sb_rextsize);
do_div(endext, sc->mp->m_sb.sb_rextsize);
extcount = endext - startext + 1;
xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount,
&is_free);
if (!xchk_should_check_xref(sc, &error, NULL))
goto out_unlock;
if (is_free)
xchk_ino_xref_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
out_unlock:
xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
}
|
