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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2022-2024 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#include "xfs_platform.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_rtgroup.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_rmap.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/repair.h"
/* Set us up with a transaction and an empty context. */
int
xchk_setup_rgsuperblock(
struct xfs_scrub *sc)
{
if (xchk_need_intent_drain(sc))
xchk_fsgates_enable(sc, XCHK_FSGATES_DRAIN);
return xchk_trans_alloc(sc, 0);
}
/* Cross-reference with the other rt metadata. */
STATIC void
xchk_rgsuperblock_xref(
struct xfs_scrub *sc)
{
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
xchk_xref_is_used_rt_space(sc, xfs_rgbno_to_rtb(sc->sr.rtg, 0),
sc->mp->m_sb.sb_rextsize);
xchk_xref_is_only_rt_owned_by(sc, 0, sc->mp->m_sb.sb_rextsize,
&XFS_RMAP_OINFO_FS);
}
int
xchk_rgsuperblock(
struct xfs_scrub *sc)
{
struct xfs_buf *bp = NULL;
xfs_rgnumber_t rgno = sc->sm->sm_agno;
unsigned int flags;
int error;
/*
* Only rtgroup 0 has a superblock. We may someday want to use higher
* rgno for other functions, similar to what we do with the primary
* super scrub function.
*/
if (rgno != 0)
return -ENOENT;
/*
* Grab an active reference to the rtgroup structure. If we can't get
* it, we're racing with something that's tearing down the group, so
* signal that the group no longer exists. Take the rtbitmap in shared
* mode so that the group can't change while we're doing things.
*/
error = xchk_rtgroup_init_existing(sc, rgno, &sc->sr);
if (!xchk_xref_process_error(sc, 0, 0, &error))
return error;
if (xfs_has_rtrmapbt(sc->mp))
flags = XFS_RTGLOCK_BITMAP | XFS_RTGLOCK_RMAP;
else
flags = XFS_RTGLOCK_BITMAP_SHARED;
error = xchk_rtgroup_lock(sc, &sc->sr, flags);
if (error)
return error;
/*
* Read the rt super from disk in case it's been corrupted since mount
* time. Crashing with a bad rt super may prevent remount, so we want
* to fix these things ASAP.
*/
error = xfs_buf_read_uncached(sc->mp->m_rtdev_targp, XFS_RTSB_DADDR,
sc->mp->m_sb.sb_blocksize >> BBSHIFT, &bp,
&xfs_rtsb_buf_ops);
if (!xchk_process_rt_error(sc, 0, 0, &error))
return error;
xfs_buf_relse(bp);
xchk_rgsuperblock_xref(sc);
return 0;
}
#ifdef CONFIG_XFS_ONLINE_REPAIR
int
xrep_rgsuperblock(
struct xfs_scrub *sc)
{
struct xfs_buf *sb_bp;
struct xfs_buf *rtsb_bp;
int error;
ASSERT(rtg_rgno(sc->sr.rtg) == 0);
sb_bp = xfs_trans_getsb(sc->tp);
xfs_log_sb(sc->tp);
rtsb_bp = xfs_log_rtsb(sc->tp, sb_bp);
if (!rtsb_bp)
return 0;
/* synchronous transaction to flush/release the buffer log item */
xfs_trans_set_sync(sc->tp);
error = xrep_trans_commit(sc);
if (error)
return error;
/* write the rt super out immediately */
xfs_buf_lock(rtsb_bp);
xfs_buf_hold(rtsb_bp);
error = xfs_bwrite(rtsb_bp);
xfs_buf_relse(rtsb_bp);
return error;
}
#endif /* CONFIG_XFS_ONLINE_REPAIR */
|
