1
2
3
4
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.h"
14#include "xfs_log_priv.h"
15#include "xfs_mount.h"
16
17struct xfs_sysfs_attr {
18 struct attribute attr;
19 ssize_t (*show)(struct kobject *kobject, char *buf);
20 ssize_t (*store)(struct kobject *kobject, const char *buf,
21 size_t count);
22};
23
24static inline struct xfs_sysfs_attr *
25to_attr(struct attribute *attr)
26{
27 return container_of(attr, struct xfs_sysfs_attr, attr);
28}
29
30#define XFS_SYSFS_ATTR_RW(name) \
31 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
32#define XFS_SYSFS_ATTR_RO(name) \
33 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
34#define XFS_SYSFS_ATTR_WO(name) \
35 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)
36
37#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
38
39STATIC ssize_t
40xfs_sysfs_object_show(
41 struct kobject *kobject,
42 struct attribute *attr,
43 char *buf)
44{
45 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
46
47 return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
48}
49
50STATIC ssize_t
51xfs_sysfs_object_store(
52 struct kobject *kobject,
53 struct attribute *attr,
54 const char *buf,
55 size_t count)
56{
57 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
58
59 return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
60}
61
62static const struct sysfs_ops xfs_sysfs_ops = {
63 .show = xfs_sysfs_object_show,
64 .store = xfs_sysfs_object_store,
65};
66
67static struct attribute *xfs_mp_attrs[] = {
68 NULL,
69};
70
71struct kobj_type xfs_mp_ktype = {
72 .release = xfs_sysfs_release,
73 .sysfs_ops = &xfs_sysfs_ops,
74 .default_attrs = xfs_mp_attrs,
75};
76
77#ifdef DEBUG
78
79
80STATIC ssize_t
81bug_on_assert_store(
82 struct kobject *kobject,
83 const char *buf,
84 size_t count)
85{
86 int ret;
87 int val;
88
89 ret = kstrtoint(buf, 0, &val);
90 if (ret)
91 return ret;
92
93 if (val == 1)
94 xfs_globals.bug_on_assert = true;
95 else if (val == 0)
96 xfs_globals.bug_on_assert = false;
97 else
98 return -EINVAL;
99
100 return count;
101}
102
103STATIC ssize_t
104bug_on_assert_show(
105 struct kobject *kobject,
106 char *buf)
107{
108 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.bug_on_assert ? 1 : 0);
109}
110XFS_SYSFS_ATTR_RW(bug_on_assert);
111
112STATIC ssize_t
113log_recovery_delay_store(
114 struct kobject *kobject,
115 const char *buf,
116 size_t count)
117{
118 int ret;
119 int val;
120
121 ret = kstrtoint(buf, 0, &val);
122 if (ret)
123 return ret;
124
125 if (val < 0 || val > 60)
126 return -EINVAL;
127
128 xfs_globals.log_recovery_delay = val;
129
130 return count;
131}
132
133STATIC ssize_t
134log_recovery_delay_show(
135 struct kobject *kobject,
136 char *buf)
137{
138 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
139}
140XFS_SYSFS_ATTR_RW(log_recovery_delay);
141
142STATIC ssize_t
143mount_delay_store(
144 struct kobject *kobject,
145 const char *buf,
146 size_t count)
147{
148 int ret;
149 int val;
150
151 ret = kstrtoint(buf, 0, &val);
152 if (ret)
153 return ret;
154
155 if (val < 0 || val > 60)
156 return -EINVAL;
157
158 xfs_globals.mount_delay = val;
159
160 return count;
161}
162
163STATIC ssize_t
164mount_delay_show(
165 struct kobject *kobject,
166 char *buf)
167{
168 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.mount_delay);
169}
170XFS_SYSFS_ATTR_RW(mount_delay);
171
172static ssize_t
173always_cow_store(
174 struct kobject *kobject,
175 const char *buf,
176 size_t count)
177{
178 ssize_t ret;
179
180 ret = kstrtobool(buf, &xfs_globals.always_cow);
181 if (ret < 0)
182 return ret;
183 return count;
184}
185
186static ssize_t
187always_cow_show(
188 struct kobject *kobject,
189 char *buf)
190{
191 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.always_cow);
192}
193XFS_SYSFS_ATTR_RW(always_cow);
194
195#ifdef DEBUG
196
197
198
199
200
201STATIC ssize_t
202pwork_threads_store(
203 struct kobject *kobject,
204 const char *buf,
205 size_t count)
206{
207 int ret;
208 int val;
209
210 ret = kstrtoint(buf, 0, &val);
211 if (ret)
212 return ret;
213
214 if (val < -1 || val > num_possible_cpus())
215 return -EINVAL;
216
217 xfs_globals.pwork_threads = val;
218
219 return count;
220}
221
222STATIC ssize_t
223pwork_threads_show(
224 struct kobject *kobject,
225 char *buf)
226{
227 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.pwork_threads);
228}
229XFS_SYSFS_ATTR_RW(pwork_threads);
230#endif
231
232static struct attribute *xfs_dbg_attrs[] = {
233 ATTR_LIST(bug_on_assert),
234 ATTR_LIST(log_recovery_delay),
235 ATTR_LIST(mount_delay),
236 ATTR_LIST(always_cow),
237#ifdef DEBUG
238 ATTR_LIST(pwork_threads),
239#endif
240 NULL,
241};
242
243struct kobj_type xfs_dbg_ktype = {
244 .release = xfs_sysfs_release,
245 .sysfs_ops = &xfs_sysfs_ops,
246 .default_attrs = xfs_dbg_attrs,
247};
248
249#endif
250
251
252
253static inline struct xstats *
254to_xstats(struct kobject *kobject)
255{
256 struct xfs_kobj *kobj = to_kobj(kobject);
257
258 return container_of(kobj, struct xstats, xs_kobj);
259}
260
261STATIC ssize_t
262stats_show(
263 struct kobject *kobject,
264 char *buf)
265{
266 struct xstats *stats = to_xstats(kobject);
267
268 return xfs_stats_format(stats->xs_stats, buf);
269}
270XFS_SYSFS_ATTR_RO(stats);
271
272STATIC ssize_t
273stats_clear_store(
274 struct kobject *kobject,
275 const char *buf,
276 size_t count)
277{
278 int ret;
279 int val;
280 struct xstats *stats = to_xstats(kobject);
281
282 ret = kstrtoint(buf, 0, &val);
283 if (ret)
284 return ret;
285
286 if (val != 1)
287 return -EINVAL;
288
289 xfs_stats_clearall(stats->xs_stats);
290 return count;
291}
292XFS_SYSFS_ATTR_WO(stats_clear);
293
294static struct attribute *xfs_stats_attrs[] = {
295 ATTR_LIST(stats),
296 ATTR_LIST(stats_clear),
297 NULL,
298};
299
300struct kobj_type xfs_stats_ktype = {
301 .release = xfs_sysfs_release,
302 .sysfs_ops = &xfs_sysfs_ops,
303 .default_attrs = xfs_stats_attrs,
304};
305
306
307
308static inline struct xlog *
309to_xlog(struct kobject *kobject)
310{
311 struct xfs_kobj *kobj = to_kobj(kobject);
312
313 return container_of(kobj, struct xlog, l_kobj);
314}
315
316STATIC ssize_t
317log_head_lsn_show(
318 struct kobject *kobject,
319 char *buf)
320{
321 int cycle;
322 int block;
323 struct xlog *log = to_xlog(kobject);
324
325 spin_lock(&log->l_icloglock);
326 cycle = log->l_curr_cycle;
327 block = log->l_curr_block;
328 spin_unlock(&log->l_icloglock);
329
330 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
331}
332XFS_SYSFS_ATTR_RO(log_head_lsn);
333
334STATIC ssize_t
335log_tail_lsn_show(
336 struct kobject *kobject,
337 char *buf)
338{
339 int cycle;
340 int block;
341 struct xlog *log = to_xlog(kobject);
342
343 xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
344 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
345}
346XFS_SYSFS_ATTR_RO(log_tail_lsn);
347
348STATIC ssize_t
349reserve_grant_head_show(
350 struct kobject *kobject,
351 char *buf)
352
353{
354 int cycle;
355 int bytes;
356 struct xlog *log = to_xlog(kobject);
357
358 xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
359 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
360}
361XFS_SYSFS_ATTR_RO(reserve_grant_head);
362
363STATIC ssize_t
364write_grant_head_show(
365 struct kobject *kobject,
366 char *buf)
367{
368 int cycle;
369 int bytes;
370 struct xlog *log = to_xlog(kobject);
371
372 xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
373 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
374}
375XFS_SYSFS_ATTR_RO(write_grant_head);
376
377static struct attribute *xfs_log_attrs[] = {
378 ATTR_LIST(log_head_lsn),
379 ATTR_LIST(log_tail_lsn),
380 ATTR_LIST(reserve_grant_head),
381 ATTR_LIST(write_grant_head),
382 NULL,
383};
384
385struct kobj_type xfs_log_ktype = {
386 .release = xfs_sysfs_release,
387 .sysfs_ops = &xfs_sysfs_ops,
388 .default_attrs = xfs_log_attrs,
389};
390
391
392
393
394
395
396
397
398
399
400
401static inline struct xfs_error_cfg *
402to_error_cfg(struct kobject *kobject)
403{
404 struct xfs_kobj *kobj = to_kobj(kobject);
405 return container_of(kobj, struct xfs_error_cfg, kobj);
406}
407
408static inline struct xfs_mount *
409err_to_mp(struct kobject *kobject)
410{
411 struct xfs_kobj *kobj = to_kobj(kobject);
412 return container_of(kobj, struct xfs_mount, m_error_kobj);
413}
414
415static ssize_t
416max_retries_show(
417 struct kobject *kobject,
418 char *buf)
419{
420 int retries;
421 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
422
423 if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
424 retries = -1;
425 else
426 retries = cfg->max_retries;
427
428 return snprintf(buf, PAGE_SIZE, "%d\n", retries);
429}
430
431static ssize_t
432max_retries_store(
433 struct kobject *kobject,
434 const char *buf,
435 size_t count)
436{
437 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
438 int ret;
439 int val;
440
441 ret = kstrtoint(buf, 0, &val);
442 if (ret)
443 return ret;
444
445 if (val < -1)
446 return -EINVAL;
447
448 if (val == -1)
449 cfg->max_retries = XFS_ERR_RETRY_FOREVER;
450 else
451 cfg->max_retries = val;
452 return count;
453}
454XFS_SYSFS_ATTR_RW(max_retries);
455
456static ssize_t
457retry_timeout_seconds_show(
458 struct kobject *kobject,
459 char *buf)
460{
461 int timeout;
462 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
463
464 if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
465 timeout = -1;
466 else
467 timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
468
469 return snprintf(buf, PAGE_SIZE, "%d\n", timeout);
470}
471
472static ssize_t
473retry_timeout_seconds_store(
474 struct kobject *kobject,
475 const char *buf,
476 size_t count)
477{
478 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
479 int ret;
480 int val;
481
482 ret = kstrtoint(buf, 0, &val);
483 if (ret)
484 return ret;
485
486
487 if (val < -1 || val > 86400)
488 return -EINVAL;
489
490 if (val == -1)
491 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
492 else {
493 cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
494 ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
495 }
496 return count;
497}
498XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
499
500static ssize_t
501fail_at_unmount_show(
502 struct kobject *kobject,
503 char *buf)
504{
505 struct xfs_mount *mp = err_to_mp(kobject);
506
507 return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount);
508}
509
510static ssize_t
511fail_at_unmount_store(
512 struct kobject *kobject,
513 const char *buf,
514 size_t count)
515{
516 struct xfs_mount *mp = err_to_mp(kobject);
517 int ret;
518 int val;
519
520 ret = kstrtoint(buf, 0, &val);
521 if (ret)
522 return ret;
523
524 if (val < 0 || val > 1)
525 return -EINVAL;
526
527 mp->m_fail_unmount = val;
528 return count;
529}
530XFS_SYSFS_ATTR_RW(fail_at_unmount);
531
532static struct attribute *xfs_error_attrs[] = {
533 ATTR_LIST(max_retries),
534 ATTR_LIST(retry_timeout_seconds),
535 NULL,
536};
537
538
539static struct kobj_type xfs_error_cfg_ktype = {
540 .release = xfs_sysfs_release,
541 .sysfs_ops = &xfs_sysfs_ops,
542 .default_attrs = xfs_error_attrs,
543};
544
545static struct kobj_type xfs_error_ktype = {
546 .release = xfs_sysfs_release,
547 .sysfs_ops = &xfs_sysfs_ops,
548};
549
550
551
552
553
554
555
556struct xfs_error_init {
557 char *name;
558 int max_retries;
559 int retry_timeout;
560};
561
562static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
563 { .name = "default",
564 .max_retries = XFS_ERR_RETRY_FOREVER,
565 .retry_timeout = XFS_ERR_RETRY_FOREVER,
566 },
567 { .name = "EIO",
568 .max_retries = XFS_ERR_RETRY_FOREVER,
569 .retry_timeout = XFS_ERR_RETRY_FOREVER,
570 },
571 { .name = "ENOSPC",
572 .max_retries = XFS_ERR_RETRY_FOREVER,
573 .retry_timeout = XFS_ERR_RETRY_FOREVER,
574 },
575 { .name = "ENODEV",
576 .max_retries = 0,
577 .retry_timeout = 0,
578 },
579};
580
581static int
582xfs_error_sysfs_init_class(
583 struct xfs_mount *mp,
584 int class,
585 const char *parent_name,
586 struct xfs_kobj *parent_kobj,
587 const struct xfs_error_init init[])
588{
589 struct xfs_error_cfg *cfg;
590 int error;
591 int i;
592
593 ASSERT(class < XFS_ERR_CLASS_MAX);
594
595 error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
596 &mp->m_error_kobj, parent_name);
597 if (error)
598 return error;
599
600 for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
601 cfg = &mp->m_error_cfg[class][i];
602 error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
603 parent_kobj, init[i].name);
604 if (error)
605 goto out_error;
606
607 cfg->max_retries = init[i].max_retries;
608 if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
609 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
610 else
611 cfg->retry_timeout = msecs_to_jiffies(
612 init[i].retry_timeout * MSEC_PER_SEC);
613 }
614 return 0;
615
616out_error:
617
618 for (i--; i >= 0; i--) {
619 cfg = &mp->m_error_cfg[class][i];
620 xfs_sysfs_del(&cfg->kobj);
621 }
622 xfs_sysfs_del(parent_kobj);
623 return error;
624}
625
626int
627xfs_error_sysfs_init(
628 struct xfs_mount *mp)
629{
630 int error;
631
632
633 error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
634 &mp->m_kobj, "error");
635 if (error)
636 return error;
637
638 error = sysfs_create_file(&mp->m_error_kobj.kobject,
639 ATTR_LIST(fail_at_unmount));
640
641 if (error)
642 goto out_error;
643
644
645 error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
646 "metadata", &mp->m_error_meta_kobj,
647 xfs_error_meta_init);
648 if (error)
649 goto out_error;
650
651 return 0;
652
653out_error:
654 xfs_sysfs_del(&mp->m_error_kobj);
655 return error;
656}
657
658void
659xfs_error_sysfs_del(
660 struct xfs_mount *mp)
661{
662 struct xfs_error_cfg *cfg;
663 int i, j;
664
665 for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
666 for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
667 cfg = &mp->m_error_cfg[i][j];
668
669 xfs_sysfs_del(&cfg->kobj);
670 }
671 }
672 xfs_sysfs_del(&mp->m_error_meta_kobj);
673 xfs_sysfs_del(&mp->m_error_kobj);
674}
675
676struct xfs_error_cfg *
677xfs_error_get_cfg(
678 struct xfs_mount *mp,
679 int error_class,
680 int error)
681{
682 struct xfs_error_cfg *cfg;
683
684 if (error < 0)
685 error = -error;
686
687 switch (error) {
688 case EIO:
689 cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
690 break;
691 case ENOSPC:
692 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
693 break;
694 case ENODEV:
695 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
696 break;
697 default:
698 cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
699 break;
700 }
701
702 return cfg;
703}
704