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1/*
2 * Copyright (c) 2014 Red Hat, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#include "xfs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_sysfs.h"
25#include "xfs_log.h"
26#include "xfs_log_priv.h"
27#include "xfs_stats.h"
28#include "xfs_mount.h"
29
30struct xfs_sysfs_attr {
31 struct attribute attr;
32 ssize_t (*show)(struct kobject *kobject, char *buf);
33 ssize_t (*store)(struct kobject *kobject, const char *buf,
34 size_t count);
35};
36
37static inline struct xfs_sysfs_attr *
38to_attr(struct attribute *attr)
39{
40 return container_of(attr, struct xfs_sysfs_attr, attr);
41}
42
43#define XFS_SYSFS_ATTR_RW(name) \
44 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
45#define XFS_SYSFS_ATTR_RO(name) \
46 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
47#define XFS_SYSFS_ATTR_WO(name) \
48 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)
49
50#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
51
52STATIC ssize_t
53xfs_sysfs_object_show(
54 struct kobject *kobject,
55 struct attribute *attr,
56 char *buf)
57{
58 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
59
60 return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
61}
62
63STATIC ssize_t
64xfs_sysfs_object_store(
65 struct kobject *kobject,
66 struct attribute *attr,
67 const char *buf,
68 size_t count)
69{
70 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
71
72 return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
73}
74
75static const struct sysfs_ops xfs_sysfs_ops = {
76 .show = xfs_sysfs_object_show,
77 .store = xfs_sysfs_object_store,
78};
79
80/*
81 * xfs_mount kobject. The mp kobject also serves as the per-mount parent object
82 * that is identified by the fsname under sysfs.
83 */
84
85static inline struct xfs_mount *
86to_mp(struct kobject *kobject)
87{
88 struct xfs_kobj *kobj = to_kobj(kobject);
89
90 return container_of(kobj, struct xfs_mount, m_kobj);
91}
92
93#ifdef DEBUG
94
95STATIC ssize_t
96fail_writes_store(
97 struct kobject *kobject,
98 const char *buf,
99 size_t count)
100{
101 struct xfs_mount *mp = to_mp(kobject);
102 int ret;
103 int val;
104
105 ret = kstrtoint(buf, 0, &val);
106 if (ret)
107 return ret;
108
109 if (val == 1)
110 mp->m_fail_writes = true;
111 else if (val == 0)
112 mp->m_fail_writes = false;
113 else
114 return -EINVAL;
115
116 return count;
117}
118
119STATIC ssize_t
120fail_writes_show(
121 struct kobject *kobject,
122 char *buf)
123{
124 struct xfs_mount *mp = to_mp(kobject);
125
126 return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_writes ? 1 : 0);
127}
128XFS_SYSFS_ATTR_RW(fail_writes);
129
130#endif /* DEBUG */
131
132static struct attribute *xfs_mp_attrs[] = {
133#ifdef DEBUG
134 ATTR_LIST(fail_writes),
135#endif
136 NULL,
137};
138
139struct kobj_type xfs_mp_ktype = {
140 .release = xfs_sysfs_release,
141 .sysfs_ops = &xfs_sysfs_ops,
142 .default_attrs = xfs_mp_attrs,
143};
144
145#ifdef DEBUG
146/* debug */
147
148STATIC ssize_t
149log_recovery_delay_store(
150 struct kobject *kobject,
151 const char *buf,
152 size_t count)
153{
154 int ret;
155 int val;
156
157 ret = kstrtoint(buf, 0, &val);
158 if (ret)
159 return ret;
160
161 if (val < 0 || val > 60)
162 return -EINVAL;
163
164 xfs_globals.log_recovery_delay = val;
165
166 return count;
167}
168
169STATIC ssize_t
170log_recovery_delay_show(
171 struct kobject *kobject,
172 char *buf)
173{
174 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
175}
176XFS_SYSFS_ATTR_RW(log_recovery_delay);
177
178static struct attribute *xfs_dbg_attrs[] = {
179 ATTR_LIST(log_recovery_delay),
180 NULL,
181};
182
183struct kobj_type xfs_dbg_ktype = {
184 .release = xfs_sysfs_release,
185 .sysfs_ops = &xfs_sysfs_ops,
186 .default_attrs = xfs_dbg_attrs,
187};
188
189#endif /* DEBUG */
190
191/* stats */
192
193static inline struct xstats *
194to_xstats(struct kobject *kobject)
195{
196 struct xfs_kobj *kobj = to_kobj(kobject);
197
198 return container_of(kobj, struct xstats, xs_kobj);
199}
200
201STATIC ssize_t
202stats_show(
203 struct kobject *kobject,
204 char *buf)
205{
206 struct xstats *stats = to_xstats(kobject);
207
208 return xfs_stats_format(stats->xs_stats, buf);
209}
210XFS_SYSFS_ATTR_RO(stats);
211
212STATIC ssize_t
213stats_clear_store(
214 struct kobject *kobject,
215 const char *buf,
216 size_t count)
217{
218 int ret;
219 int val;
220 struct xstats *stats = to_xstats(kobject);
221
222 ret = kstrtoint(buf, 0, &val);
223 if (ret)
224 return ret;
225
226 if (val != 1)
227 return -EINVAL;
228
229 xfs_stats_clearall(stats->xs_stats);
230 return count;
231}
232XFS_SYSFS_ATTR_WO(stats_clear);
233
234static struct attribute *xfs_stats_attrs[] = {
235 ATTR_LIST(stats),
236 ATTR_LIST(stats_clear),
237 NULL,
238};
239
240struct kobj_type xfs_stats_ktype = {
241 .release = xfs_sysfs_release,
242 .sysfs_ops = &xfs_sysfs_ops,
243 .default_attrs = xfs_stats_attrs,
244};
245
246/* xlog */
247
248static inline struct xlog *
249to_xlog(struct kobject *kobject)
250{
251 struct xfs_kobj *kobj = to_kobj(kobject);
252
253 return container_of(kobj, struct xlog, l_kobj);
254}
255
256STATIC ssize_t
257log_head_lsn_show(
258 struct kobject *kobject,
259 char *buf)
260{
261 int cycle;
262 int block;
263 struct xlog *log = to_xlog(kobject);
264
265 spin_lock(&log->l_icloglock);
266 cycle = log->l_curr_cycle;
267 block = log->l_curr_block;
268 spin_unlock(&log->l_icloglock);
269
270 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
271}
272XFS_SYSFS_ATTR_RO(log_head_lsn);
273
274STATIC ssize_t
275log_tail_lsn_show(
276 struct kobject *kobject,
277 char *buf)
278{
279 int cycle;
280 int block;
281 struct xlog *log = to_xlog(kobject);
282
283 xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
284 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
285}
286XFS_SYSFS_ATTR_RO(log_tail_lsn);
287
288STATIC ssize_t
289reserve_grant_head_show(
290 struct kobject *kobject,
291 char *buf)
292
293{
294 int cycle;
295 int bytes;
296 struct xlog *log = to_xlog(kobject);
297
298 xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
299 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
300}
301XFS_SYSFS_ATTR_RO(reserve_grant_head);
302
303STATIC ssize_t
304write_grant_head_show(
305 struct kobject *kobject,
306 char *buf)
307{
308 int cycle;
309 int bytes;
310 struct xlog *log = to_xlog(kobject);
311
312 xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
313 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
314}
315XFS_SYSFS_ATTR_RO(write_grant_head);
316
317#ifdef DEBUG
318STATIC ssize_t
319log_badcrc_factor_store(
320 struct kobject *kobject,
321 const char *buf,
322 size_t count)
323{
324 struct xlog *log = to_xlog(kobject);
325 int ret;
326 uint32_t val;
327
328 ret = kstrtouint(buf, 0, &val);
329 if (ret)
330 return ret;
331
332 log->l_badcrc_factor = val;
333
334 return count;
335}
336
337STATIC ssize_t
338log_badcrc_factor_show(
339 struct kobject *kobject,
340 char *buf)
341{
342 struct xlog *log = to_xlog(kobject);
343
344 return snprintf(buf, PAGE_SIZE, "%d\n", log->l_badcrc_factor);
345}
346
347XFS_SYSFS_ATTR_RW(log_badcrc_factor);
348#endif /* DEBUG */
349
350static struct attribute *xfs_log_attrs[] = {
351 ATTR_LIST(log_head_lsn),
352 ATTR_LIST(log_tail_lsn),
353 ATTR_LIST(reserve_grant_head),
354 ATTR_LIST(write_grant_head),
355#ifdef DEBUG
356 ATTR_LIST(log_badcrc_factor),
357#endif
358 NULL,
359};
360
361struct kobj_type xfs_log_ktype = {
362 .release = xfs_sysfs_release,
363 .sysfs_ops = &xfs_sysfs_ops,
364 .default_attrs = xfs_log_attrs,
365};
366
367/*
368 * Metadata IO error configuration
369 *
370 * The sysfs structure here is:
371 * ...xfs/<dev>/error/<class>/<errno>/<error_attrs>
372 *
373 * where <class> allows us to discriminate between data IO and metadata IO,
374 * and any other future type of IO (e.g. special inode or directory error
375 * handling) we care to support.
376 */
377static inline struct xfs_error_cfg *
378to_error_cfg(struct kobject *kobject)
379{
380 struct xfs_kobj *kobj = to_kobj(kobject);
381 return container_of(kobj, struct xfs_error_cfg, kobj);
382}
383
384static inline struct xfs_mount *
385err_to_mp(struct kobject *kobject)
386{
387 struct xfs_kobj *kobj = to_kobj(kobject);
388 return container_of(kobj, struct xfs_mount, m_error_kobj);
389}
390
391static ssize_t
392max_retries_show(
393 struct kobject *kobject,
394 char *buf)
395{
396 int retries;
397 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
398
399 if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
400 retries = -1;
401 else
402 retries = cfg->max_retries;
403
404 return snprintf(buf, PAGE_SIZE, "%d\n", retries);
405}
406
407static ssize_t
408max_retries_store(
409 struct kobject *kobject,
410 const char *buf,
411 size_t count)
412{
413 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
414 int ret;
415 int val;
416
417 ret = kstrtoint(buf, 0, &val);
418 if (ret)
419 return ret;
420
421 if (val < -1)
422 return -EINVAL;
423
424 if (val == -1)
425 cfg->max_retries = XFS_ERR_RETRY_FOREVER;
426 else
427 cfg->max_retries = val;
428 return count;
429}
430XFS_SYSFS_ATTR_RW(max_retries);
431
432static ssize_t
433retry_timeout_seconds_show(
434 struct kobject *kobject,
435 char *buf)
436{
437 int timeout;
438 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
439
440 if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
441 timeout = -1;
442 else
443 timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
444
445 return snprintf(buf, PAGE_SIZE, "%d\n", timeout);
446}
447
448static ssize_t
449retry_timeout_seconds_store(
450 struct kobject *kobject,
451 const char *buf,
452 size_t count)
453{
454 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
455 int ret;
456 int val;
457
458 ret = kstrtoint(buf, 0, &val);
459 if (ret)
460 return ret;
461
462 /* 1 day timeout maximum, -1 means infinite */
463 if (val < -1 || val > 86400)
464 return -EINVAL;
465
466 if (val == -1)
467 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
468 else {
469 cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
470 ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
471 }
472 return count;
473}
474XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
475
476static ssize_t
477fail_at_unmount_show(
478 struct kobject *kobject,
479 char *buf)
480{
481 struct xfs_mount *mp = err_to_mp(kobject);
482
483 return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount);
484}
485
486static ssize_t
487fail_at_unmount_store(
488 struct kobject *kobject,
489 const char *buf,
490 size_t count)
491{
492 struct xfs_mount *mp = err_to_mp(kobject);
493 int ret;
494 int val;
495
496 ret = kstrtoint(buf, 0, &val);
497 if (ret)
498 return ret;
499
500 if (val < 0 || val > 1)
501 return -EINVAL;
502
503 mp->m_fail_unmount = val;
504 return count;
505}
506XFS_SYSFS_ATTR_RW(fail_at_unmount);
507
508static struct attribute *xfs_error_attrs[] = {
509 ATTR_LIST(max_retries),
510 ATTR_LIST(retry_timeout_seconds),
511 NULL,
512};
513
514
515static struct kobj_type xfs_error_cfg_ktype = {
516 .release = xfs_sysfs_release,
517 .sysfs_ops = &xfs_sysfs_ops,
518 .default_attrs = xfs_error_attrs,
519};
520
521static struct kobj_type xfs_error_ktype = {
522 .release = xfs_sysfs_release,
523 .sysfs_ops = &xfs_sysfs_ops,
524};
525
526/*
527 * Error initialization tables. These need to be ordered in the same
528 * order as the enums used to index the array. All class init tables need to
529 * define a "default" behaviour as the first entry, all other entries can be
530 * empty.
531 */
532struct xfs_error_init {
533 char *name;
534 int max_retries;
535 int retry_timeout; /* in seconds */
536};
537
538static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
539 { .name = "default",
540 .max_retries = XFS_ERR_RETRY_FOREVER,
541 .retry_timeout = XFS_ERR_RETRY_FOREVER,
542 },
543 { .name = "EIO",
544 .max_retries = XFS_ERR_RETRY_FOREVER,
545 .retry_timeout = XFS_ERR_RETRY_FOREVER,
546 },
547 { .name = "ENOSPC",
548 .max_retries = XFS_ERR_RETRY_FOREVER,
549 .retry_timeout = XFS_ERR_RETRY_FOREVER,
550 },
551 { .name = "ENODEV",
552 .max_retries = 0, /* We can't recover from devices disappearing */
553 .retry_timeout = 0,
554 },
555};
556
557static int
558xfs_error_sysfs_init_class(
559 struct xfs_mount *mp,
560 int class,
561 const char *parent_name,
562 struct xfs_kobj *parent_kobj,
563 const struct xfs_error_init init[])
564{
565 struct xfs_error_cfg *cfg;
566 int error;
567 int i;
568
569 ASSERT(class < XFS_ERR_CLASS_MAX);
570
571 error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
572 &mp->m_error_kobj, parent_name);
573 if (error)
574 return error;
575
576 for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
577 cfg = &mp->m_error_cfg[class][i];
578 error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
579 parent_kobj, init[i].name);
580 if (error)
581 goto out_error;
582
583 cfg->max_retries = init[i].max_retries;
584 if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
585 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
586 else
587 cfg->retry_timeout = msecs_to_jiffies(
588 init[i].retry_timeout * MSEC_PER_SEC);
589 }
590 return 0;
591
592out_error:
593 /* unwind the entries that succeeded */
594 for (i--; i >= 0; i--) {
595 cfg = &mp->m_error_cfg[class][i];
596 xfs_sysfs_del(&cfg->kobj);
597 }
598 xfs_sysfs_del(parent_kobj);
599 return error;
600}
601
602int
603xfs_error_sysfs_init(
604 struct xfs_mount *mp)
605{
606 int error;
607
608 /* .../xfs/<dev>/error/ */
609 error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
610 &mp->m_kobj, "error");
611 if (error)
612 return error;
613
614 error = sysfs_create_file(&mp->m_error_kobj.kobject,
615 ATTR_LIST(fail_at_unmount));
616
617 if (error)
618 goto out_error;
619
620 /* .../xfs/<dev>/error/metadata/ */
621 error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
622 "metadata", &mp->m_error_meta_kobj,
623 xfs_error_meta_init);
624 if (error)
625 goto out_error;
626
627 return 0;
628
629out_error:
630 xfs_sysfs_del(&mp->m_error_kobj);
631 return error;
632}
633
634void
635xfs_error_sysfs_del(
636 struct xfs_mount *mp)
637{
638 struct xfs_error_cfg *cfg;
639 int i, j;
640
641 for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
642 for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
643 cfg = &mp->m_error_cfg[i][j];
644
645 xfs_sysfs_del(&cfg->kobj);
646 }
647 }
648 xfs_sysfs_del(&mp->m_error_meta_kobj);
649 xfs_sysfs_del(&mp->m_error_kobj);
650}
651
652struct xfs_error_cfg *
653xfs_error_get_cfg(
654 struct xfs_mount *mp,
655 int error_class,
656 int error)
657{
658 struct xfs_error_cfg *cfg;
659
660 if (error < 0)
661 error = -error;
662
663 switch (error) {
664 case EIO:
665 cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
666 break;
667 case ENOSPC:
668 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
669 break;
670 case ENODEV:
671 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
672 break;
673 default:
674 cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
675 break;
676 }
677
678 return cfg;
679}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2014 Red Hat, Inc.
4 * All Rights Reserved.
5 */
6
7#include "xfs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_sysfs.h"
13#include "xfs_log_priv.h"
14#include "xfs_mount.h"
15
16struct xfs_sysfs_attr {
17 struct attribute attr;
18 ssize_t (*show)(struct kobject *kobject, char *buf);
19 ssize_t (*store)(struct kobject *kobject, const char *buf,
20 size_t count);
21};
22
23static inline struct xfs_sysfs_attr *
24to_attr(struct attribute *attr)
25{
26 return container_of(attr, struct xfs_sysfs_attr, attr);
27}
28
29#define XFS_SYSFS_ATTR_RW(name) \
30 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
31#define XFS_SYSFS_ATTR_RO(name) \
32 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
33#define XFS_SYSFS_ATTR_WO(name) \
34 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)
35
36#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
37
38STATIC ssize_t
39xfs_sysfs_object_show(
40 struct kobject *kobject,
41 struct attribute *attr,
42 char *buf)
43{
44 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
45
46 return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
47}
48
49STATIC ssize_t
50xfs_sysfs_object_store(
51 struct kobject *kobject,
52 struct attribute *attr,
53 const char *buf,
54 size_t count)
55{
56 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
57
58 return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
59}
60
61static const struct sysfs_ops xfs_sysfs_ops = {
62 .show = xfs_sysfs_object_show,
63 .store = xfs_sysfs_object_store,
64};
65
66static struct attribute *xfs_mp_attrs[] = {
67 NULL,
68};
69
70struct kobj_type xfs_mp_ktype = {
71 .release = xfs_sysfs_release,
72 .sysfs_ops = &xfs_sysfs_ops,
73 .default_attrs = xfs_mp_attrs,
74};
75
76#ifdef DEBUG
77/* debug */
78
79STATIC ssize_t
80bug_on_assert_store(
81 struct kobject *kobject,
82 const char *buf,
83 size_t count)
84{
85 int ret;
86 int val;
87
88 ret = kstrtoint(buf, 0, &val);
89 if (ret)
90 return ret;
91
92 if (val == 1)
93 xfs_globals.bug_on_assert = true;
94 else if (val == 0)
95 xfs_globals.bug_on_assert = false;
96 else
97 return -EINVAL;
98
99 return count;
100}
101
102STATIC ssize_t
103bug_on_assert_show(
104 struct kobject *kobject,
105 char *buf)
106{
107 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.bug_on_assert ? 1 : 0);
108}
109XFS_SYSFS_ATTR_RW(bug_on_assert);
110
111STATIC ssize_t
112log_recovery_delay_store(
113 struct kobject *kobject,
114 const char *buf,
115 size_t count)
116{
117 int ret;
118 int val;
119
120 ret = kstrtoint(buf, 0, &val);
121 if (ret)
122 return ret;
123
124 if (val < 0 || val > 60)
125 return -EINVAL;
126
127 xfs_globals.log_recovery_delay = val;
128
129 return count;
130}
131
132STATIC ssize_t
133log_recovery_delay_show(
134 struct kobject *kobject,
135 char *buf)
136{
137 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
138}
139XFS_SYSFS_ATTR_RW(log_recovery_delay);
140
141STATIC ssize_t
142mount_delay_store(
143 struct kobject *kobject,
144 const char *buf,
145 size_t count)
146{
147 int ret;
148 int val;
149
150 ret = kstrtoint(buf, 0, &val);
151 if (ret)
152 return ret;
153
154 if (val < 0 || val > 60)
155 return -EINVAL;
156
157 xfs_globals.mount_delay = val;
158
159 return count;
160}
161
162STATIC ssize_t
163mount_delay_show(
164 struct kobject *kobject,
165 char *buf)
166{
167 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.mount_delay);
168}
169XFS_SYSFS_ATTR_RW(mount_delay);
170
171static ssize_t
172always_cow_store(
173 struct kobject *kobject,
174 const char *buf,
175 size_t count)
176{
177 ssize_t ret;
178
179 ret = kstrtobool(buf, &xfs_globals.always_cow);
180 if (ret < 0)
181 return ret;
182 return count;
183}
184
185static ssize_t
186always_cow_show(
187 struct kobject *kobject,
188 char *buf)
189{
190 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.always_cow);
191}
192XFS_SYSFS_ATTR_RW(always_cow);
193
194#ifdef DEBUG
195/*
196 * Override how many threads the parallel work queue is allowed to create.
197 * This has to be a debug-only global (instead of an errortag) because one of
198 * the main users of parallel workqueues is mount time quotacheck.
199 */
200STATIC ssize_t
201pwork_threads_store(
202 struct kobject *kobject,
203 const char *buf,
204 size_t count)
205{
206 int ret;
207 int val;
208
209 ret = kstrtoint(buf, 0, &val);
210 if (ret)
211 return ret;
212
213 if (val < -1 || val > num_possible_cpus())
214 return -EINVAL;
215
216 xfs_globals.pwork_threads = val;
217
218 return count;
219}
220
221STATIC ssize_t
222pwork_threads_show(
223 struct kobject *kobject,
224 char *buf)
225{
226 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.pwork_threads);
227}
228XFS_SYSFS_ATTR_RW(pwork_threads);
229#endif /* DEBUG */
230
231static struct attribute *xfs_dbg_attrs[] = {
232 ATTR_LIST(bug_on_assert),
233 ATTR_LIST(log_recovery_delay),
234 ATTR_LIST(mount_delay),
235 ATTR_LIST(always_cow),
236#ifdef DEBUG
237 ATTR_LIST(pwork_threads),
238#endif
239 NULL,
240};
241
242struct kobj_type xfs_dbg_ktype = {
243 .release = xfs_sysfs_release,
244 .sysfs_ops = &xfs_sysfs_ops,
245 .default_attrs = xfs_dbg_attrs,
246};
247
248#endif /* DEBUG */
249
250/* stats */
251
252static inline struct xstats *
253to_xstats(struct kobject *kobject)
254{
255 struct xfs_kobj *kobj = to_kobj(kobject);
256
257 return container_of(kobj, struct xstats, xs_kobj);
258}
259
260STATIC ssize_t
261stats_show(
262 struct kobject *kobject,
263 char *buf)
264{
265 struct xstats *stats = to_xstats(kobject);
266
267 return xfs_stats_format(stats->xs_stats, buf);
268}
269XFS_SYSFS_ATTR_RO(stats);
270
271STATIC ssize_t
272stats_clear_store(
273 struct kobject *kobject,
274 const char *buf,
275 size_t count)
276{
277 int ret;
278 int val;
279 struct xstats *stats = to_xstats(kobject);
280
281 ret = kstrtoint(buf, 0, &val);
282 if (ret)
283 return ret;
284
285 if (val != 1)
286 return -EINVAL;
287
288 xfs_stats_clearall(stats->xs_stats);
289 return count;
290}
291XFS_SYSFS_ATTR_WO(stats_clear);
292
293static struct attribute *xfs_stats_attrs[] = {
294 ATTR_LIST(stats),
295 ATTR_LIST(stats_clear),
296 NULL,
297};
298
299struct kobj_type xfs_stats_ktype = {
300 .release = xfs_sysfs_release,
301 .sysfs_ops = &xfs_sysfs_ops,
302 .default_attrs = xfs_stats_attrs,
303};
304
305/* xlog */
306
307static inline struct xlog *
308to_xlog(struct kobject *kobject)
309{
310 struct xfs_kobj *kobj = to_kobj(kobject);
311
312 return container_of(kobj, struct xlog, l_kobj);
313}
314
315STATIC ssize_t
316log_head_lsn_show(
317 struct kobject *kobject,
318 char *buf)
319{
320 int cycle;
321 int block;
322 struct xlog *log = to_xlog(kobject);
323
324 spin_lock(&log->l_icloglock);
325 cycle = log->l_curr_cycle;
326 block = log->l_curr_block;
327 spin_unlock(&log->l_icloglock);
328
329 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
330}
331XFS_SYSFS_ATTR_RO(log_head_lsn);
332
333STATIC ssize_t
334log_tail_lsn_show(
335 struct kobject *kobject,
336 char *buf)
337{
338 int cycle;
339 int block;
340 struct xlog *log = to_xlog(kobject);
341
342 xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
343 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
344}
345XFS_SYSFS_ATTR_RO(log_tail_lsn);
346
347STATIC ssize_t
348reserve_grant_head_show(
349 struct kobject *kobject,
350 char *buf)
351
352{
353 int cycle;
354 int bytes;
355 struct xlog *log = to_xlog(kobject);
356
357 xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
358 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
359}
360XFS_SYSFS_ATTR_RO(reserve_grant_head);
361
362STATIC ssize_t
363write_grant_head_show(
364 struct kobject *kobject,
365 char *buf)
366{
367 int cycle;
368 int bytes;
369 struct xlog *log = to_xlog(kobject);
370
371 xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
372 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
373}
374XFS_SYSFS_ATTR_RO(write_grant_head);
375
376static struct attribute *xfs_log_attrs[] = {
377 ATTR_LIST(log_head_lsn),
378 ATTR_LIST(log_tail_lsn),
379 ATTR_LIST(reserve_grant_head),
380 ATTR_LIST(write_grant_head),
381 NULL,
382};
383
384struct kobj_type xfs_log_ktype = {
385 .release = xfs_sysfs_release,
386 .sysfs_ops = &xfs_sysfs_ops,
387 .default_attrs = xfs_log_attrs,
388};
389
390/*
391 * Metadata IO error configuration
392 *
393 * The sysfs structure here is:
394 * ...xfs/<dev>/error/<class>/<errno>/<error_attrs>
395 *
396 * where <class> allows us to discriminate between data IO and metadata IO,
397 * and any other future type of IO (e.g. special inode or directory error
398 * handling) we care to support.
399 */
400static inline struct xfs_error_cfg *
401to_error_cfg(struct kobject *kobject)
402{
403 struct xfs_kobj *kobj = to_kobj(kobject);
404 return container_of(kobj, struct xfs_error_cfg, kobj);
405}
406
407static inline struct xfs_mount *
408err_to_mp(struct kobject *kobject)
409{
410 struct xfs_kobj *kobj = to_kobj(kobject);
411 return container_of(kobj, struct xfs_mount, m_error_kobj);
412}
413
414static ssize_t
415max_retries_show(
416 struct kobject *kobject,
417 char *buf)
418{
419 int retries;
420 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
421
422 if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
423 retries = -1;
424 else
425 retries = cfg->max_retries;
426
427 return snprintf(buf, PAGE_SIZE, "%d\n", retries);
428}
429
430static ssize_t
431max_retries_store(
432 struct kobject *kobject,
433 const char *buf,
434 size_t count)
435{
436 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
437 int ret;
438 int val;
439
440 ret = kstrtoint(buf, 0, &val);
441 if (ret)
442 return ret;
443
444 if (val < -1)
445 return -EINVAL;
446
447 if (val == -1)
448 cfg->max_retries = XFS_ERR_RETRY_FOREVER;
449 else
450 cfg->max_retries = val;
451 return count;
452}
453XFS_SYSFS_ATTR_RW(max_retries);
454
455static ssize_t
456retry_timeout_seconds_show(
457 struct kobject *kobject,
458 char *buf)
459{
460 int timeout;
461 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
462
463 if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
464 timeout = -1;
465 else
466 timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
467
468 return snprintf(buf, PAGE_SIZE, "%d\n", timeout);
469}
470
471static ssize_t
472retry_timeout_seconds_store(
473 struct kobject *kobject,
474 const char *buf,
475 size_t count)
476{
477 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
478 int ret;
479 int val;
480
481 ret = kstrtoint(buf, 0, &val);
482 if (ret)
483 return ret;
484
485 /* 1 day timeout maximum, -1 means infinite */
486 if (val < -1 || val > 86400)
487 return -EINVAL;
488
489 if (val == -1)
490 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
491 else {
492 cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
493 ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
494 }
495 return count;
496}
497XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
498
499static ssize_t
500fail_at_unmount_show(
501 struct kobject *kobject,
502 char *buf)
503{
504 struct xfs_mount *mp = err_to_mp(kobject);
505
506 return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount);
507}
508
509static ssize_t
510fail_at_unmount_store(
511 struct kobject *kobject,
512 const char *buf,
513 size_t count)
514{
515 struct xfs_mount *mp = err_to_mp(kobject);
516 int ret;
517 int val;
518
519 ret = kstrtoint(buf, 0, &val);
520 if (ret)
521 return ret;
522
523 if (val < 0 || val > 1)
524 return -EINVAL;
525
526 mp->m_fail_unmount = val;
527 return count;
528}
529XFS_SYSFS_ATTR_RW(fail_at_unmount);
530
531static struct attribute *xfs_error_attrs[] = {
532 ATTR_LIST(max_retries),
533 ATTR_LIST(retry_timeout_seconds),
534 NULL,
535};
536
537
538static struct kobj_type xfs_error_cfg_ktype = {
539 .release = xfs_sysfs_release,
540 .sysfs_ops = &xfs_sysfs_ops,
541 .default_attrs = xfs_error_attrs,
542};
543
544static struct kobj_type xfs_error_ktype = {
545 .release = xfs_sysfs_release,
546 .sysfs_ops = &xfs_sysfs_ops,
547};
548
549/*
550 * Error initialization tables. These need to be ordered in the same
551 * order as the enums used to index the array. All class init tables need to
552 * define a "default" behaviour as the first entry, all other entries can be
553 * empty.
554 */
555struct xfs_error_init {
556 char *name;
557 int max_retries;
558 int retry_timeout; /* in seconds */
559};
560
561static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
562 { .name = "default",
563 .max_retries = XFS_ERR_RETRY_FOREVER,
564 .retry_timeout = XFS_ERR_RETRY_FOREVER,
565 },
566 { .name = "EIO",
567 .max_retries = XFS_ERR_RETRY_FOREVER,
568 .retry_timeout = XFS_ERR_RETRY_FOREVER,
569 },
570 { .name = "ENOSPC",
571 .max_retries = XFS_ERR_RETRY_FOREVER,
572 .retry_timeout = XFS_ERR_RETRY_FOREVER,
573 },
574 { .name = "ENODEV",
575 .max_retries = 0, /* We can't recover from devices disappearing */
576 .retry_timeout = 0,
577 },
578};
579
580static int
581xfs_error_sysfs_init_class(
582 struct xfs_mount *mp,
583 int class,
584 const char *parent_name,
585 struct xfs_kobj *parent_kobj,
586 const struct xfs_error_init init[])
587{
588 struct xfs_error_cfg *cfg;
589 int error;
590 int i;
591
592 ASSERT(class < XFS_ERR_CLASS_MAX);
593
594 error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
595 &mp->m_error_kobj, parent_name);
596 if (error)
597 return error;
598
599 for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
600 cfg = &mp->m_error_cfg[class][i];
601 error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
602 parent_kobj, init[i].name);
603 if (error)
604 goto out_error;
605
606 cfg->max_retries = init[i].max_retries;
607 if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
608 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
609 else
610 cfg->retry_timeout = msecs_to_jiffies(
611 init[i].retry_timeout * MSEC_PER_SEC);
612 }
613 return 0;
614
615out_error:
616 /* unwind the entries that succeeded */
617 for (i--; i >= 0; i--) {
618 cfg = &mp->m_error_cfg[class][i];
619 xfs_sysfs_del(&cfg->kobj);
620 }
621 xfs_sysfs_del(parent_kobj);
622 return error;
623}
624
625int
626xfs_error_sysfs_init(
627 struct xfs_mount *mp)
628{
629 int error;
630
631 /* .../xfs/<dev>/error/ */
632 error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
633 &mp->m_kobj, "error");
634 if (error)
635 return error;
636
637 error = sysfs_create_file(&mp->m_error_kobj.kobject,
638 ATTR_LIST(fail_at_unmount));
639
640 if (error)
641 goto out_error;
642
643 /* .../xfs/<dev>/error/metadata/ */
644 error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
645 "metadata", &mp->m_error_meta_kobj,
646 xfs_error_meta_init);
647 if (error)
648 goto out_error;
649
650 return 0;
651
652out_error:
653 xfs_sysfs_del(&mp->m_error_kobj);
654 return error;
655}
656
657void
658xfs_error_sysfs_del(
659 struct xfs_mount *mp)
660{
661 struct xfs_error_cfg *cfg;
662 int i, j;
663
664 for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
665 for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
666 cfg = &mp->m_error_cfg[i][j];
667
668 xfs_sysfs_del(&cfg->kobj);
669 }
670 }
671 xfs_sysfs_del(&mp->m_error_meta_kobj);
672 xfs_sysfs_del(&mp->m_error_kobj);
673}
674
675struct xfs_error_cfg *
676xfs_error_get_cfg(
677 struct xfs_mount *mp,
678 int error_class,
679 int error)
680{
681 struct xfs_error_cfg *cfg;
682
683 if (error < 0)
684 error = -error;
685
686 switch (error) {
687 case EIO:
688 cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
689 break;
690 case ENOSPC:
691 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
692 break;
693 case ENODEV:
694 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
695 break;
696 default:
697 cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
698 break;
699 }
700
701 return cfg;
702}