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
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2019 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_defer.h"
#include "xfs_btree.h"
#include "xfs_bit.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_inode.h"
#include "xfs_inode_fork.h"
#include "xfs_alloc.h"
#include "xfs_bmap.h"
#include "xfs_quota.h"
#include "xfs_qm.h"
#include "xfs_dquot.h"
#include "xfs_dquot_item.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/trace.h"
#include "scrub/repair.h"
/*
* Quota Repair
* ============
*
* Quota repairs are fairly simplistic; we fix everything that the dquot
* verifiers complain about, cap any counters or limits that make no sense,
* and schedule a quotacheck if we had to fix anything. We also repair any
* data fork extent records that don't apply to metadata files.
*/
struct xrep_quota_info {
struct xfs_scrub *sc;
bool need_quotacheck;
};
/* Scrub the fields in an individual quota item. */
STATIC int
xrep_quota_item(
struct xfs_dquot *dq,
uint dqtype,
void *priv)
{
struct xrep_quota_info *rqi = priv;
struct xfs_scrub *sc = rqi->sc;
struct xfs_mount *mp = sc->mp;
struct xfs_disk_dquot *d = &dq->q_core;
unsigned long long bsoft;
unsigned long long isoft;
unsigned long long rsoft;
unsigned long long bhard;
unsigned long long ihard;
unsigned long long rhard;
unsigned long long bcount;
unsigned long long icount;
unsigned long long rcount;
xfs_ino_t fs_icount;
bool dirty = false;
int error;
/* Did we get the dquot type we wanted? */
if (dqtype != (d->d_flags & XFS_DQ_ALLTYPES)) {
d->d_flags = dqtype;
dirty = true;
}
if (d->d_pad0 || d->d_pad) {
d->d_pad0 = 0;
d->d_pad = 0;
dirty = true;
}
/* Check the limits. */
bhard = be64_to_cpu(d->d_blk_hardlimit);
ihard = be64_to_cpu(d->d_ino_hardlimit);
rhard = be64_to_cpu(d->d_rtb_hardlimit);
bsoft = be64_to_cpu(d->d_blk_softlimit);
isoft = be64_to_cpu(d->d_ino_softlimit);
rsoft = be64_to_cpu(d->d_rtb_softlimit);
if (bsoft > bhard) {
d->d_blk_softlimit = d->d_blk_hardlimit;
dirty = true;
}
if (isoft > ihard) {
d->d_ino_softlimit = d->d_ino_hardlimit;
dirty = true;
}
if (rsoft > rhard) {
d->d_rtb_softlimit = d->d_rtb_hardlimit;
dirty = true;
}
/* Check the resource counts. */
bcount = be64_to_cpu(d->d_bcount);
icount = be64_to_cpu(d->d_icount);
rcount = be64_to_cpu(d->d_rtbcount);
fs_icount = percpu_counter_sum(&mp->m_icount);
/*
* Check that usage doesn't exceed physical limits. However, on
* a reflink filesystem we're allowed to exceed physical space
* if there are no quota limits. We don't know what the real number
* is, but we can make quotacheck find out for us.
*/
if (!xfs_sb_version_hasreflink(&mp->m_sb) &&
mp->m_sb.sb_dblocks < bcount) {
dq->q_res_bcount -= be64_to_cpu(dq->q_core.d_bcount);
dq->q_res_bcount += mp->m_sb.sb_dblocks;
d->d_bcount = cpu_to_be64(mp->m_sb.sb_dblocks);
rqi->need_quotacheck = true;
dirty = true;
}
if (icount > fs_icount) {
dq->q_res_icount -= be64_to_cpu(dq->q_core.d_icount);
dq->q_res_icount += fs_icount;
d->d_icount = cpu_to_be64(fs_icount);
rqi->need_quotacheck = true;
dirty = true;
}
if (rcount > mp->m_sb.sb_rblocks) {
dq->q_res_rtbcount -= be64_to_cpu(dq->q_core.d_rtbcount);
dq->q_res_rtbcount += mp->m_sb.sb_rblocks;
d->d_rtbcount = cpu_to_be64(mp->m_sb.sb_rblocks);
rqi->need_quotacheck = true;
dirty = true;
}
if (!dirty)
return 0;
dq->dq_flags |= XFS_DQ_DIRTY;
xfs_trans_dqjoin(sc->tp, dq);
xfs_trans_log_dquot(sc->tp, dq);
error = xfs_trans_roll(&sc->tp);
xfs_dqlock(dq);
return error;
}
/* Fix a quota timer so that we can pass the verifier. */
STATIC void
xrep_quota_fix_timer(
__be64 softlimit,
__be64 countnow,
__be32 *timer,
time_t timelimit)
{
uint64_t soft = be64_to_cpu(softlimit);
uint64_t count = be64_to_cpu(countnow);
if (soft && count > soft && *timer == 0)
*timer = cpu_to_be32(get_seconds() + timelimit);
}
/* Fix anything the verifiers complain about. */
STATIC int
xrep_quota_block(
struct xfs_scrub *sc,
struct xfs_buf *bp,
uint dqtype,
xfs_dqid_t id)
{
struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr;
struct xfs_disk_dquot *ddq;
struct xfs_quotainfo *qi = sc->mp->m_quotainfo;
enum xfs_blft buftype = 0;
int i;
bp->b_ops = &xfs_dquot_buf_ops;
for (i = 0; i < qi->qi_dqperchunk; i++) {
ddq = &d[i].dd_diskdq;
ddq->d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
ddq->d_version = XFS_DQUOT_VERSION;
ddq->d_flags = dqtype;
ddq->d_id = cpu_to_be32(id + i);
xrep_quota_fix_timer(ddq->d_blk_softlimit,
ddq->d_bcount, &ddq->d_btimer,
qi->qi_btimelimit);
xrep_quota_fix_timer(ddq->d_ino_softlimit,
ddq->d_icount, &ddq->d_itimer,
qi->qi_itimelimit);
xrep_quota_fix_timer(ddq->d_rtb_softlimit,
ddq->d_rtbcount, &ddq->d_rtbtimer,
qi->qi_rtbtimelimit);
/* We only support v5 filesystems so always set these. */
uuid_copy(&d->dd_uuid, &sc->mp->m_sb.sb_meta_uuid);
xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk),
XFS_DQUOT_CRC_OFF);
d->dd_lsn = 0;
}
switch (dqtype) {
case XFS_DQ_USER:
buftype = XFS_BLFT_UDQUOT_BUF;
break;
case XFS_DQ_GROUP:
buftype = XFS_BLFT_GDQUOT_BUF;
break;
case XFS_DQ_PROJ:
buftype = XFS_BLFT_PDQUOT_BUF;
break;
}
xfs_trans_buf_set_type(sc->tp, bp, buftype);
xfs_trans_log_buf(sc->tp, bp, 0, BBTOB(bp->b_length) - 1);
return xfs_trans_roll(&sc->tp);
}
/* Repair quota's data fork. */
STATIC int
xrep_quota_data_fork(
struct xfs_scrub *sc,
uint dqtype)
{
struct xfs_bmbt_irec irec = { 0 };
struct xfs_iext_cursor icur;
struct xfs_quotainfo *qi = sc->mp->m_quotainfo;
struct xfs_ifork *ifp;
struct xfs_buf *bp;
struct xfs_dqblk *d;
xfs_dqid_t id;
xfs_fileoff_t max_dqid_off;
xfs_fileoff_t off;
xfs_fsblock_t fsbno;
bool truncate = false;
int error = 0;
error = xrep_metadata_inode_forks(sc);
if (error)
goto out;
/* Check for data fork problems that apply only to quota files. */
max_dqid_off = ((xfs_dqid_t)-1) / qi->qi_dqperchunk;
ifp = XFS_IFORK_PTR(sc->ip, XFS_DATA_FORK);
for_each_xfs_iext(ifp, &icur, &irec) {
if (isnullstartblock(irec.br_startblock)) {
error = -EFSCORRUPTED;
goto out;
}
if (irec.br_startoff > max_dqid_off ||
irec.br_startoff + irec.br_blockcount - 1 > max_dqid_off) {
truncate = true;
break;
}
}
if (truncate) {
error = xfs_itruncate_extents(&sc->tp, sc->ip, XFS_DATA_FORK,
max_dqid_off * sc->mp->m_sb.sb_blocksize);
if (error)
goto out;
}
/* Now go fix anything that fails the verifiers. */
for_each_xfs_iext(ifp, &icur, &irec) {
for (fsbno = irec.br_startblock, off = irec.br_startoff;
fsbno < irec.br_startblock + irec.br_blockcount;
fsbno += XFS_DQUOT_CLUSTER_SIZE_FSB,
off += XFS_DQUOT_CLUSTER_SIZE_FSB) {
id = off * qi->qi_dqperchunk;
error = xfs_trans_read_buf(sc->mp, sc->tp,
sc->mp->m_ddev_targp,
XFS_FSB_TO_DADDR(sc->mp, fsbno),
qi->qi_dqchunklen,
0, &bp, &xfs_dquot_buf_ops);
if (error == 0) {
d = (struct xfs_dqblk *)bp->b_addr;
if (id == be32_to_cpu(d->dd_diskdq.d_id)) {
xfs_trans_brelse(sc->tp, bp);
continue;
}
error = -EFSCORRUPTED;
xfs_trans_brelse(sc->tp, bp);
}
if (error != -EFSBADCRC && error != -EFSCORRUPTED)
goto out;
/* Failed verifier, try again. */
error = xfs_trans_read_buf(sc->mp, sc->tp,
sc->mp->m_ddev_targp,
XFS_FSB_TO_DADDR(sc->mp, fsbno),
qi->qi_dqchunklen,
0, &bp, NULL);
if (error)
goto out;
/*
* Fix the quota block, which will roll our transaction
* and release bp.
*/
error = xrep_quota_block(sc, bp, dqtype, id);
if (error)
goto out;
}
}
out:
return error;
}
/*
* Go fix anything in the quota items that we could have been mad about. Now
* that we've checked the quota inode data fork we have to drop ILOCK_EXCL to
* use the regular dquot functions.
*/
STATIC int
xrep_quota_problems(
struct xfs_scrub *sc,
uint dqtype)
{
struct xrep_quota_info rqi;
int error;
rqi.sc = sc;
rqi.need_quotacheck = false;
error = xfs_qm_dqiterate(sc->mp, dqtype, xrep_quota_item, &rqi);
if (error)
return error;
/* Make a quotacheck happen. */
if (rqi.need_quotacheck)
xrep_force_quotacheck(sc, dqtype);
return 0;
}
/* Repair all of a quota type's items. */
int
xrep_quota(
struct xfs_scrub *sc)
{
uint dqtype;
int error;
dqtype = xchk_quota_to_dqtype(sc);
/* Fix problematic data fork mappings. */
error = xrep_quota_data_fork(sc, dqtype);
if (error)
goto out;
/* Unlock quota inode; we play only with dquots from now on. */
xfs_iunlock(sc->ip, sc->ilock_flags);
sc->ilock_flags = 0;
/* Fix anything the dquot verifiers complain about. */
error = xrep_quota_problems(sc, dqtype);
out:
return error;
}
|