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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};
70ATTRIBUTE_GROUPS(xfs_mp);
71
72struct kobj_type xfs_mp_ktype = {
73 .release = xfs_sysfs_release,
74 .sysfs_ops = &xfs_sysfs_ops,
75 .default_groups = xfs_mp_groups,
76};
77
78#ifdef DEBUG
79
80
81STATIC ssize_t
82bug_on_assert_store(
83 struct kobject *kobject,
84 const char *buf,
85 size_t count)
86{
87 int ret;
88 int val;
89
90 ret = kstrtoint(buf, 0, &val);
91 if (ret)
92 return ret;
93
94 if (val == 1)
95 xfs_globals.bug_on_assert = true;
96 else if (val == 0)
97 xfs_globals.bug_on_assert = false;
98 else
99 return -EINVAL;
100
101 return count;
102}
103
104STATIC ssize_t
105bug_on_assert_show(
106 struct kobject *kobject,
107 char *buf)
108{
109 return sysfs_emit(buf, "%d\n", xfs_globals.bug_on_assert);
110}
111XFS_SYSFS_ATTR_RW(bug_on_assert);
112
113STATIC ssize_t
114log_recovery_delay_store(
115 struct kobject *kobject,
116 const char *buf,
117 size_t count)
118{
119 int ret;
120 int val;
121
122 ret = kstrtoint(buf, 0, &val);
123 if (ret)
124 return ret;
125
126 if (val < 0 || val > 60)
127 return -EINVAL;
128
129 xfs_globals.log_recovery_delay = val;
130
131 return count;
132}
133
134STATIC ssize_t
135log_recovery_delay_show(
136 struct kobject *kobject,
137 char *buf)
138{
139 return sysfs_emit(buf, "%d\n", xfs_globals.log_recovery_delay);
140}
141XFS_SYSFS_ATTR_RW(log_recovery_delay);
142
143STATIC ssize_t
144mount_delay_store(
145 struct kobject *kobject,
146 const char *buf,
147 size_t count)
148{
149 int ret;
150 int val;
151
152 ret = kstrtoint(buf, 0, &val);
153 if (ret)
154 return ret;
155
156 if (val < 0 || val > 60)
157 return -EINVAL;
158
159 xfs_globals.mount_delay = val;
160
161 return count;
162}
163
164STATIC ssize_t
165mount_delay_show(
166 struct kobject *kobject,
167 char *buf)
168{
169 return sysfs_emit(buf, "%d\n", xfs_globals.mount_delay);
170}
171XFS_SYSFS_ATTR_RW(mount_delay);
172
173static ssize_t
174always_cow_store(
175 struct kobject *kobject,
176 const char *buf,
177 size_t count)
178{
179 ssize_t ret;
180
181 ret = kstrtobool(buf, &xfs_globals.always_cow);
182 if (ret < 0)
183 return ret;
184 return count;
185}
186
187static ssize_t
188always_cow_show(
189 struct kobject *kobject,
190 char *buf)
191{
192 return sysfs_emit(buf, "%d\n", xfs_globals.always_cow);
193}
194XFS_SYSFS_ATTR_RW(always_cow);
195
196#ifdef DEBUG
197
198
199
200
201
202STATIC ssize_t
203pwork_threads_store(
204 struct kobject *kobject,
205 const char *buf,
206 size_t count)
207{
208 int ret;
209 int val;
210
211 ret = kstrtoint(buf, 0, &val);
212 if (ret)
213 return ret;
214
215 if (val < -1 || val > num_possible_cpus())
216 return -EINVAL;
217
218 xfs_globals.pwork_threads = val;
219
220 return count;
221}
222
223STATIC ssize_t
224pwork_threads_show(
225 struct kobject *kobject,
226 char *buf)
227{
228 return sysfs_emit(buf, "%d\n", xfs_globals.pwork_threads);
229}
230XFS_SYSFS_ATTR_RW(pwork_threads);
231#endif
232
233static struct attribute *xfs_dbg_attrs[] = {
234 ATTR_LIST(bug_on_assert),
235 ATTR_LIST(log_recovery_delay),
236 ATTR_LIST(mount_delay),
237 ATTR_LIST(always_cow),
238#ifdef DEBUG
239 ATTR_LIST(pwork_threads),
240#endif
241 NULL,
242};
243ATTRIBUTE_GROUPS(xfs_dbg);
244
245struct kobj_type xfs_dbg_ktype = {
246 .release = xfs_sysfs_release,
247 .sysfs_ops = &xfs_sysfs_ops,
248 .default_groups = xfs_dbg_groups,
249};
250
251#endif
252
253
254
255static inline struct xstats *
256to_xstats(struct kobject *kobject)
257{
258 struct xfs_kobj *kobj = to_kobj(kobject);
259
260 return container_of(kobj, struct xstats, xs_kobj);
261}
262
263STATIC ssize_t
264stats_show(
265 struct kobject *kobject,
266 char *buf)
267{
268 struct xstats *stats = to_xstats(kobject);
269
270 return xfs_stats_format(stats->xs_stats, buf);
271}
272XFS_SYSFS_ATTR_RO(stats);
273
274STATIC ssize_t
275stats_clear_store(
276 struct kobject *kobject,
277 const char *buf,
278 size_t count)
279{
280 int ret;
281 int val;
282 struct xstats *stats = to_xstats(kobject);
283
284 ret = kstrtoint(buf, 0, &val);
285 if (ret)
286 return ret;
287
288 if (val != 1)
289 return -EINVAL;
290
291 xfs_stats_clearall(stats->xs_stats);
292 return count;
293}
294XFS_SYSFS_ATTR_WO(stats_clear);
295
296static struct attribute *xfs_stats_attrs[] = {
297 ATTR_LIST(stats),
298 ATTR_LIST(stats_clear),
299 NULL,
300};
301ATTRIBUTE_GROUPS(xfs_stats);
302
303struct kobj_type xfs_stats_ktype = {
304 .release = xfs_sysfs_release,
305 .sysfs_ops = &xfs_sysfs_ops,
306 .default_groups = xfs_stats_groups,
307};
308
309
310
311static inline struct xlog *
312to_xlog(struct kobject *kobject)
313{
314 struct xfs_kobj *kobj = to_kobj(kobject);
315
316 return container_of(kobj, struct xlog, l_kobj);
317}
318
319STATIC ssize_t
320log_head_lsn_show(
321 struct kobject *kobject,
322 char *buf)
323{
324 int cycle;
325 int block;
326 struct xlog *log = to_xlog(kobject);
327
328 spin_lock(&log->l_icloglock);
329 cycle = log->l_curr_cycle;
330 block = log->l_curr_block;
331 spin_unlock(&log->l_icloglock);
332
333 return sysfs_emit(buf, "%d:%d\n", cycle, block);
334}
335XFS_SYSFS_ATTR_RO(log_head_lsn);
336
337STATIC ssize_t
338log_tail_lsn_show(
339 struct kobject *kobject,
340 char *buf)
341{
342 int cycle;
343 int block;
344 struct xlog *log = to_xlog(kobject);
345
346 xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
347 return sysfs_emit(buf, "%d:%d\n", cycle, block);
348}
349XFS_SYSFS_ATTR_RO(log_tail_lsn);
350
351STATIC ssize_t
352reserve_grant_head_show(
353 struct kobject *kobject,
354 char *buf)
355
356{
357 int cycle;
358 int bytes;
359 struct xlog *log = to_xlog(kobject);
360
361 xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
362 return sysfs_emit(buf, "%d:%d\n", cycle, bytes);
363}
364XFS_SYSFS_ATTR_RO(reserve_grant_head);
365
366STATIC ssize_t
367write_grant_head_show(
368 struct kobject *kobject,
369 char *buf)
370{
371 int cycle;
372 int bytes;
373 struct xlog *log = to_xlog(kobject);
374
375 xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
376 return sysfs_emit(buf, "%d:%d\n", cycle, bytes);
377}
378XFS_SYSFS_ATTR_RO(write_grant_head);
379
380static struct attribute *xfs_log_attrs[] = {
381 ATTR_LIST(log_head_lsn),
382 ATTR_LIST(log_tail_lsn),
383 ATTR_LIST(reserve_grant_head),
384 ATTR_LIST(write_grant_head),
385 NULL,
386};
387ATTRIBUTE_GROUPS(xfs_log);
388
389struct kobj_type xfs_log_ktype = {
390 .release = xfs_sysfs_release,
391 .sysfs_ops = &xfs_sysfs_ops,
392 .default_groups = xfs_log_groups,
393};
394
395
396
397
398
399
400
401
402
403
404
405static inline struct xfs_error_cfg *
406to_error_cfg(struct kobject *kobject)
407{
408 struct xfs_kobj *kobj = to_kobj(kobject);
409 return container_of(kobj, struct xfs_error_cfg, kobj);
410}
411
412static inline struct xfs_mount *
413err_to_mp(struct kobject *kobject)
414{
415 struct xfs_kobj *kobj = to_kobj(kobject);
416 return container_of(kobj, struct xfs_mount, m_error_kobj);
417}
418
419static ssize_t
420max_retries_show(
421 struct kobject *kobject,
422 char *buf)
423{
424 int retries;
425 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
426
427 if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
428 retries = -1;
429 else
430 retries = cfg->max_retries;
431
432 return sysfs_emit(buf, "%d\n", retries);
433}
434
435static ssize_t
436max_retries_store(
437 struct kobject *kobject,
438 const char *buf,
439 size_t count)
440{
441 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
442 int ret;
443 int val;
444
445 ret = kstrtoint(buf, 0, &val);
446 if (ret)
447 return ret;
448
449 if (val < -1)
450 return -EINVAL;
451
452 if (val == -1)
453 cfg->max_retries = XFS_ERR_RETRY_FOREVER;
454 else
455 cfg->max_retries = val;
456 return count;
457}
458XFS_SYSFS_ATTR_RW(max_retries);
459
460static ssize_t
461retry_timeout_seconds_show(
462 struct kobject *kobject,
463 char *buf)
464{
465 int timeout;
466 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
467
468 if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
469 timeout = -1;
470 else
471 timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
472
473 return sysfs_emit(buf, "%d\n", timeout);
474}
475
476static ssize_t
477retry_timeout_seconds_store(
478 struct kobject *kobject,
479 const char *buf,
480 size_t count)
481{
482 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
483 int ret;
484 int val;
485
486 ret = kstrtoint(buf, 0, &val);
487 if (ret)
488 return ret;
489
490
491 if (val < -1 || val > 86400)
492 return -EINVAL;
493
494 if (val == -1)
495 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
496 else {
497 cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
498 ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
499 }
500 return count;
501}
502XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
503
504static ssize_t
505fail_at_unmount_show(
506 struct kobject *kobject,
507 char *buf)
508{
509 struct xfs_mount *mp = err_to_mp(kobject);
510
511 return sysfs_emit(buf, "%d\n", mp->m_fail_unmount);
512}
513
514static ssize_t
515fail_at_unmount_store(
516 struct kobject *kobject,
517 const char *buf,
518 size_t count)
519{
520 struct xfs_mount *mp = err_to_mp(kobject);
521 int ret;
522 int val;
523
524 ret = kstrtoint(buf, 0, &val);
525 if (ret)
526 return ret;
527
528 if (val < 0 || val > 1)
529 return -EINVAL;
530
531 mp->m_fail_unmount = val;
532 return count;
533}
534XFS_SYSFS_ATTR_RW(fail_at_unmount);
535
536static struct attribute *xfs_error_attrs[] = {
537 ATTR_LIST(max_retries),
538 ATTR_LIST(retry_timeout_seconds),
539 NULL,
540};
541ATTRIBUTE_GROUPS(xfs_error);
542
543static struct kobj_type xfs_error_cfg_ktype = {
544 .release = xfs_sysfs_release,
545 .sysfs_ops = &xfs_sysfs_ops,
546 .default_groups = xfs_error_groups,
547};
548
549static struct kobj_type xfs_error_ktype = {
550 .release = xfs_sysfs_release,
551 .sysfs_ops = &xfs_sysfs_ops,
552};
553
554
555
556
557
558
559
560struct xfs_error_init {
561 char *name;
562 int max_retries;
563 int retry_timeout;
564};
565
566static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
567 { .name = "default",
568 .max_retries = XFS_ERR_RETRY_FOREVER,
569 .retry_timeout = XFS_ERR_RETRY_FOREVER,
570 },
571 { .name = "EIO",
572 .max_retries = XFS_ERR_RETRY_FOREVER,
573 .retry_timeout = XFS_ERR_RETRY_FOREVER,
574 },
575 { .name = "ENOSPC",
576 .max_retries = XFS_ERR_RETRY_FOREVER,
577 .retry_timeout = XFS_ERR_RETRY_FOREVER,
578 },
579 { .name = "ENODEV",
580 .max_retries = 0,
581 .retry_timeout = 0,
582 },
583};
584
585static int
586xfs_error_sysfs_init_class(
587 struct xfs_mount *mp,
588 int class,
589 const char *parent_name,
590 struct xfs_kobj *parent_kobj,
591 const struct xfs_error_init init[])
592{
593 struct xfs_error_cfg *cfg;
594 int error;
595 int i;
596
597 ASSERT(class < XFS_ERR_CLASS_MAX);
598
599 error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
600 &mp->m_error_kobj, parent_name);
601 if (error)
602 return error;
603
604 for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
605 cfg = &mp->m_error_cfg[class][i];
606 error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
607 parent_kobj, init[i].name);
608 if (error)
609 goto out_error;
610
611 cfg->max_retries = init[i].max_retries;
612 if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
613 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
614 else
615 cfg->retry_timeout = msecs_to_jiffies(
616 init[i].retry_timeout * MSEC_PER_SEC);
617 }
618 return 0;
619
620out_error:
621
622 for (i--; i >= 0; i--) {
623 cfg = &mp->m_error_cfg[class][i];
624 xfs_sysfs_del(&cfg->kobj);
625 }
626 xfs_sysfs_del(parent_kobj);
627 return error;
628}
629
630int
631xfs_error_sysfs_init(
632 struct xfs_mount *mp)
633{
634 int error;
635
636
637 error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
638 &mp->m_kobj, "error");
639 if (error)
640 return error;
641
642 error = sysfs_create_file(&mp->m_error_kobj.kobject,
643 ATTR_LIST(fail_at_unmount));
644
645 if (error)
646 goto out_error;
647
648
649 error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
650 "metadata", &mp->m_error_meta_kobj,
651 xfs_error_meta_init);
652 if (error)
653 goto out_error;
654
655 return 0;
656
657out_error:
658 xfs_sysfs_del(&mp->m_error_kobj);
659 return error;
660}
661
662void
663xfs_error_sysfs_del(
664 struct xfs_mount *mp)
665{
666 struct xfs_error_cfg *cfg;
667 int i, j;
668
669 for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
670 for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
671 cfg = &mp->m_error_cfg[i][j];
672
673 xfs_sysfs_del(&cfg->kobj);
674 }
675 }
676 xfs_sysfs_del(&mp->m_error_meta_kobj);
677 xfs_sysfs_del(&mp->m_error_kobj);
678}
679
680struct xfs_error_cfg *
681xfs_error_get_cfg(
682 struct xfs_mount *mp,
683 int error_class,
684 int error)
685{
686 struct xfs_error_cfg *cfg;
687
688 if (error < 0)
689 error = -error;
690
691 switch (error) {
692 case EIO:
693 cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
694 break;
695 case ENOSPC:
696 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
697 break;
698 case ENODEV:
699 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
700 break;
701 default:
702 cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
703 break;
704 }
705
706 return cfg;
707}
708