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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2022 Fujitsu. All Rights Reserved.
*/
#include "xfs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_alloc.h"
#include "xfs_bit.h"
#include "xfs_btree.h"
#include "xfs_inode.h"
#include "xfs_icache.h"
#include "xfs_rmap.h"
#include "xfs_rmap_btree.h"
#include "xfs_rtalloc.h"
#include "xfs_trans.h"
#include "xfs_ag.h"
#include <linux/mm.h>
#include <linux/dax.h>
struct xfs_failure_info {
xfs_agblock_t startblock;
xfs_extlen_t blockcount;
int mf_flags;
bool want_shutdown;
};
static pgoff_t
xfs_failure_pgoff(
struct xfs_mount *mp,
const struct xfs_rmap_irec *rec,
const struct xfs_failure_info *notify)
{
loff_t pos = XFS_FSB_TO_B(mp, rec->rm_offset);
if (notify->startblock > rec->rm_startblock)
pos += XFS_FSB_TO_B(mp,
notify->startblock - rec->rm_startblock);
return pos >> PAGE_SHIFT;
}
static unsigned long
xfs_failure_pgcnt(
struct xfs_mount *mp,
const struct xfs_rmap_irec *rec,
const struct xfs_failure_info *notify)
{
xfs_agblock_t end_rec;
xfs_agblock_t end_notify;
xfs_agblock_t start_cross;
xfs_agblock_t end_cross;
start_cross = max(rec->rm_startblock, notify->startblock);
end_rec = rec->rm_startblock + rec->rm_blockcount;
end_notify = notify->startblock + notify->blockcount;
end_cross = min(end_rec, end_notify);
return XFS_FSB_TO_B(mp, end_cross - start_cross) >> PAGE_SHIFT;
}
static int
xfs_dax_failure_fn(
struct xfs_btree_cur *cur,
const struct xfs_rmap_irec *rec,
void *data)
{
struct xfs_mount *mp = cur->bc_mp;
struct xfs_inode *ip;
struct xfs_failure_info *notify = data;
int error = 0;
if (XFS_RMAP_NON_INODE_OWNER(rec->rm_owner) ||
(rec->rm_flags & (XFS_RMAP_ATTR_FORK | XFS_RMAP_BMBT_BLOCK))) {
notify->want_shutdown = true;
return 0;
}
/* Get files that incore, filter out others that are not in use. */
error = xfs_iget(mp, cur->bc_tp, rec->rm_owner, XFS_IGET_INCORE,
0, &ip);
/* Continue the rmap query if the inode isn't incore */
if (error == -ENODATA)
return 0;
if (error) {
notify->want_shutdown = true;
return 0;
}
error = mf_dax_kill_procs(VFS_I(ip)->i_mapping,
xfs_failure_pgoff(mp, rec, notify),
xfs_failure_pgcnt(mp, rec, notify),
notify->mf_flags);
xfs_irele(ip);
return error;
}
static int
xfs_dax_notify_ddev_failure(
struct xfs_mount *mp,
xfs_daddr_t daddr,
xfs_daddr_t bblen,
int mf_flags)
{
struct xfs_failure_info notify = { .mf_flags = mf_flags };
struct xfs_trans *tp = NULL;
struct xfs_btree_cur *cur = NULL;
struct xfs_buf *agf_bp = NULL;
int error = 0;
xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, daddr);
xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, fsbno);
xfs_fsblock_t end_fsbno = XFS_DADDR_TO_FSB(mp, daddr + bblen);
xfs_agnumber_t end_agno = XFS_FSB_TO_AGNO(mp, end_fsbno);
error = xfs_trans_alloc_empty(mp, &tp);
if (error)
return error;
for (; agno <= end_agno; agno++) {
struct xfs_rmap_irec ri_low = { };
struct xfs_rmap_irec ri_high;
struct xfs_agf *agf;
xfs_agblock_t agend;
struct xfs_perag *pag;
pag = xfs_perag_get(mp, agno);
error = xfs_alloc_read_agf(pag, tp, 0, &agf_bp);
if (error) {
xfs_perag_put(pag);
break;
}
cur = xfs_rmapbt_init_cursor(mp, tp, agf_bp, pag);
/*
* Set the rmap range from ri_low to ri_high, which represents
* a [start, end] where we looking for the files or metadata.
*/
memset(&ri_high, 0xFF, sizeof(ri_high));
ri_low.rm_startblock = XFS_FSB_TO_AGBNO(mp, fsbno);
if (agno == end_agno)
ri_high.rm_startblock = XFS_FSB_TO_AGBNO(mp, end_fsbno);
agf = agf_bp->b_addr;
agend = min(be32_to_cpu(agf->agf_length),
ri_high.rm_startblock);
notify.startblock = ri_low.rm_startblock;
notify.blockcount = agend - ri_low.rm_startblock;
error = xfs_rmap_query_range(cur, &ri_low, &ri_high,
xfs_dax_failure_fn, ¬ify);
xfs_btree_del_cursor(cur, error);
xfs_trans_brelse(tp, agf_bp);
xfs_perag_put(pag);
if (error)
break;
fsbno = XFS_AGB_TO_FSB(mp, agno + 1, 0);
}
xfs_trans_cancel(tp);
if (error || notify.want_shutdown) {
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_ONDISK);
if (!error)
error = -EFSCORRUPTED;
}
return error;
}
static int
xfs_dax_notify_failure(
struct dax_device *dax_dev,
u64 offset,
u64 len,
int mf_flags)
{
struct xfs_mount *mp = dax_holder(dax_dev);
u64 ddev_start;
u64 ddev_end;
if (!(mp->m_super->s_flags & SB_BORN)) {
xfs_warn(mp, "filesystem is not ready for notify_failure()!");
return -EIO;
}
if (mp->m_rtdev_targp && mp->m_rtdev_targp->bt_daxdev == dax_dev) {
xfs_debug(mp,
"notify_failure() not supported on realtime device!");
return -EOPNOTSUPP;
}
if (mp->m_logdev_targp && mp->m_logdev_targp->bt_daxdev == dax_dev &&
mp->m_logdev_targp != mp->m_ddev_targp) {
xfs_err(mp, "ondisk log corrupt, shutting down fs!");
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_ONDISK);
return -EFSCORRUPTED;
}
if (!xfs_has_rmapbt(mp)) {
xfs_debug(mp, "notify_failure() needs rmapbt enabled!");
return -EOPNOTSUPP;
}
ddev_start = mp->m_ddev_targp->bt_dax_part_off;
ddev_end = ddev_start + bdev_nr_bytes(mp->m_ddev_targp->bt_bdev) - 1;
/* Ignore the range out of filesystem area */
if (offset + len < ddev_start)
return -ENXIO;
if (offset > ddev_end)
return -ENXIO;
/* Calculate the real range when it touches the boundary */
if (offset > ddev_start)
offset -= ddev_start;
else {
len -= ddev_start - offset;
offset = 0;
}
if (offset + len > ddev_end)
len -= ddev_end - offset;
return xfs_dax_notify_ddev_failure(mp, BTOBB(offset), BTOBB(len),
mf_flags);
}
const struct dax_holder_operations xfs_dax_holder_operations = {
.notify_failure = xfs_dax_notify_failure,
};
|
