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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
93static struct attribute *xfs_mp_attrs[] = {
94 NULL,
95};
96
97struct kobj_type xfs_mp_ktype = {
98 .release = xfs_sysfs_release,
99 .sysfs_ops = &xfs_sysfs_ops,
100 .default_attrs = xfs_mp_attrs,
101};
102
103#ifdef DEBUG
104/* debug */
105
106STATIC ssize_t
107bug_on_assert_store(
108 struct kobject *kobject,
109 const char *buf,
110 size_t count)
111{
112 int ret;
113 int val;
114
115 ret = kstrtoint(buf, 0, &val);
116 if (ret)
117 return ret;
118
119 if (val == 1)
120 xfs_globals.bug_on_assert = true;
121 else if (val == 0)
122 xfs_globals.bug_on_assert = false;
123 else
124 return -EINVAL;
125
126 return count;
127}
128
129STATIC ssize_t
130bug_on_assert_show(
131 struct kobject *kobject,
132 char *buf)
133{
134 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.bug_on_assert ? 1 : 0);
135}
136XFS_SYSFS_ATTR_RW(bug_on_assert);
137
138STATIC ssize_t
139log_recovery_delay_store(
140 struct kobject *kobject,
141 const char *buf,
142 size_t count)
143{
144 int ret;
145 int val;
146
147 ret = kstrtoint(buf, 0, &val);
148 if (ret)
149 return ret;
150
151 if (val < 0 || val > 60)
152 return -EINVAL;
153
154 xfs_globals.log_recovery_delay = val;
155
156 return count;
157}
158
159STATIC ssize_t
160log_recovery_delay_show(
161 struct kobject *kobject,
162 char *buf)
163{
164 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
165}
166XFS_SYSFS_ATTR_RW(log_recovery_delay);
167
168static struct attribute *xfs_dbg_attrs[] = {
169 ATTR_LIST(bug_on_assert),
170 ATTR_LIST(log_recovery_delay),
171 NULL,
172};
173
174struct kobj_type xfs_dbg_ktype = {
175 .release = xfs_sysfs_release,
176 .sysfs_ops = &xfs_sysfs_ops,
177 .default_attrs = xfs_dbg_attrs,
178};
179
180#endif /* DEBUG */
181
182/* stats */
183
184static inline struct xstats *
185to_xstats(struct kobject *kobject)
186{
187 struct xfs_kobj *kobj = to_kobj(kobject);
188
189 return container_of(kobj, struct xstats, xs_kobj);
190}
191
192STATIC ssize_t
193stats_show(
194 struct kobject *kobject,
195 char *buf)
196{
197 struct xstats *stats = to_xstats(kobject);
198
199 return xfs_stats_format(stats->xs_stats, buf);
200}
201XFS_SYSFS_ATTR_RO(stats);
202
203STATIC ssize_t
204stats_clear_store(
205 struct kobject *kobject,
206 const char *buf,
207 size_t count)
208{
209 int ret;
210 int val;
211 struct xstats *stats = to_xstats(kobject);
212
213 ret = kstrtoint(buf, 0, &val);
214 if (ret)
215 return ret;
216
217 if (val != 1)
218 return -EINVAL;
219
220 xfs_stats_clearall(stats->xs_stats);
221 return count;
222}
223XFS_SYSFS_ATTR_WO(stats_clear);
224
225static struct attribute *xfs_stats_attrs[] = {
226 ATTR_LIST(stats),
227 ATTR_LIST(stats_clear),
228 NULL,
229};
230
231struct kobj_type xfs_stats_ktype = {
232 .release = xfs_sysfs_release,
233 .sysfs_ops = &xfs_sysfs_ops,
234 .default_attrs = xfs_stats_attrs,
235};
236
237/* xlog */
238
239static inline struct xlog *
240to_xlog(struct kobject *kobject)
241{
242 struct xfs_kobj *kobj = to_kobj(kobject);
243
244 return container_of(kobj, struct xlog, l_kobj);
245}
246
247STATIC ssize_t
248log_head_lsn_show(
249 struct kobject *kobject,
250 char *buf)
251{
252 int cycle;
253 int block;
254 struct xlog *log = to_xlog(kobject);
255
256 spin_lock(&log->l_icloglock);
257 cycle = log->l_curr_cycle;
258 block = log->l_curr_block;
259 spin_unlock(&log->l_icloglock);
260
261 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
262}
263XFS_SYSFS_ATTR_RO(log_head_lsn);
264
265STATIC ssize_t
266log_tail_lsn_show(
267 struct kobject *kobject,
268 char *buf)
269{
270 int cycle;
271 int block;
272 struct xlog *log = to_xlog(kobject);
273
274 xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
275 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
276}
277XFS_SYSFS_ATTR_RO(log_tail_lsn);
278
279STATIC ssize_t
280reserve_grant_head_show(
281 struct kobject *kobject,
282 char *buf)
283
284{
285 int cycle;
286 int bytes;
287 struct xlog *log = to_xlog(kobject);
288
289 xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
290 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
291}
292XFS_SYSFS_ATTR_RO(reserve_grant_head);
293
294STATIC ssize_t
295write_grant_head_show(
296 struct kobject *kobject,
297 char *buf)
298{
299 int cycle;
300 int bytes;
301 struct xlog *log = to_xlog(kobject);
302
303 xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
304 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
305}
306XFS_SYSFS_ATTR_RO(write_grant_head);
307
308static struct attribute *xfs_log_attrs[] = {
309 ATTR_LIST(log_head_lsn),
310 ATTR_LIST(log_tail_lsn),
311 ATTR_LIST(reserve_grant_head),
312 ATTR_LIST(write_grant_head),
313 NULL,
314};
315
316struct kobj_type xfs_log_ktype = {
317 .release = xfs_sysfs_release,
318 .sysfs_ops = &xfs_sysfs_ops,
319 .default_attrs = xfs_log_attrs,
320};
321
322/*
323 * Metadata IO error configuration
324 *
325 * The sysfs structure here is:
326 * ...xfs/<dev>/error/<class>/<errno>/<error_attrs>
327 *
328 * where <class> allows us to discriminate between data IO and metadata IO,
329 * and any other future type of IO (e.g. special inode or directory error
330 * handling) we care to support.
331 */
332static inline struct xfs_error_cfg *
333to_error_cfg(struct kobject *kobject)
334{
335 struct xfs_kobj *kobj = to_kobj(kobject);
336 return container_of(kobj, struct xfs_error_cfg, kobj);
337}
338
339static inline struct xfs_mount *
340err_to_mp(struct kobject *kobject)
341{
342 struct xfs_kobj *kobj = to_kobj(kobject);
343 return container_of(kobj, struct xfs_mount, m_error_kobj);
344}
345
346static ssize_t
347max_retries_show(
348 struct kobject *kobject,
349 char *buf)
350{
351 int retries;
352 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
353
354 if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
355 retries = -1;
356 else
357 retries = cfg->max_retries;
358
359 return snprintf(buf, PAGE_SIZE, "%d\n", retries);
360}
361
362static ssize_t
363max_retries_store(
364 struct kobject *kobject,
365 const char *buf,
366 size_t count)
367{
368 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
369 int ret;
370 int val;
371
372 ret = kstrtoint(buf, 0, &val);
373 if (ret)
374 return ret;
375
376 if (val < -1)
377 return -EINVAL;
378
379 if (val == -1)
380 cfg->max_retries = XFS_ERR_RETRY_FOREVER;
381 else
382 cfg->max_retries = val;
383 return count;
384}
385XFS_SYSFS_ATTR_RW(max_retries);
386
387static ssize_t
388retry_timeout_seconds_show(
389 struct kobject *kobject,
390 char *buf)
391{
392 int timeout;
393 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
394
395 if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
396 timeout = -1;
397 else
398 timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
399
400 return snprintf(buf, PAGE_SIZE, "%d\n", timeout);
401}
402
403static ssize_t
404retry_timeout_seconds_store(
405 struct kobject *kobject,
406 const char *buf,
407 size_t count)
408{
409 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
410 int ret;
411 int val;
412
413 ret = kstrtoint(buf, 0, &val);
414 if (ret)
415 return ret;
416
417 /* 1 day timeout maximum, -1 means infinite */
418 if (val < -1 || val > 86400)
419 return -EINVAL;
420
421 if (val == -1)
422 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
423 else {
424 cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
425 ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
426 }
427 return count;
428}
429XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
430
431static ssize_t
432fail_at_unmount_show(
433 struct kobject *kobject,
434 char *buf)
435{
436 struct xfs_mount *mp = err_to_mp(kobject);
437
438 return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount);
439}
440
441static ssize_t
442fail_at_unmount_store(
443 struct kobject *kobject,
444 const char *buf,
445 size_t count)
446{
447 struct xfs_mount *mp = err_to_mp(kobject);
448 int ret;
449 int val;
450
451 ret = kstrtoint(buf, 0, &val);
452 if (ret)
453 return ret;
454
455 if (val < 0 || val > 1)
456 return -EINVAL;
457
458 mp->m_fail_unmount = val;
459 return count;
460}
461XFS_SYSFS_ATTR_RW(fail_at_unmount);
462
463static struct attribute *xfs_error_attrs[] = {
464 ATTR_LIST(max_retries),
465 ATTR_LIST(retry_timeout_seconds),
466 NULL,
467};
468
469
470static struct kobj_type xfs_error_cfg_ktype = {
471 .release = xfs_sysfs_release,
472 .sysfs_ops = &xfs_sysfs_ops,
473 .default_attrs = xfs_error_attrs,
474};
475
476static struct kobj_type xfs_error_ktype = {
477 .release = xfs_sysfs_release,
478 .sysfs_ops = &xfs_sysfs_ops,
479};
480
481/*
482 * Error initialization tables. These need to be ordered in the same
483 * order as the enums used to index the array. All class init tables need to
484 * define a "default" behaviour as the first entry, all other entries can be
485 * empty.
486 */
487struct xfs_error_init {
488 char *name;
489 int max_retries;
490 int retry_timeout; /* in seconds */
491};
492
493static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
494 { .name = "default",
495 .max_retries = XFS_ERR_RETRY_FOREVER,
496 .retry_timeout = XFS_ERR_RETRY_FOREVER,
497 },
498 { .name = "EIO",
499 .max_retries = XFS_ERR_RETRY_FOREVER,
500 .retry_timeout = XFS_ERR_RETRY_FOREVER,
501 },
502 { .name = "ENOSPC",
503 .max_retries = XFS_ERR_RETRY_FOREVER,
504 .retry_timeout = XFS_ERR_RETRY_FOREVER,
505 },
506 { .name = "ENODEV",
507 .max_retries = 0, /* We can't recover from devices disappearing */
508 .retry_timeout = 0,
509 },
510};
511
512static int
513xfs_error_sysfs_init_class(
514 struct xfs_mount *mp,
515 int class,
516 const char *parent_name,
517 struct xfs_kobj *parent_kobj,
518 const struct xfs_error_init init[])
519{
520 struct xfs_error_cfg *cfg;
521 int error;
522 int i;
523
524 ASSERT(class < XFS_ERR_CLASS_MAX);
525
526 error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
527 &mp->m_error_kobj, parent_name);
528 if (error)
529 return error;
530
531 for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
532 cfg = &mp->m_error_cfg[class][i];
533 error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
534 parent_kobj, init[i].name);
535 if (error)
536 goto out_error;
537
538 cfg->max_retries = init[i].max_retries;
539 if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
540 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
541 else
542 cfg->retry_timeout = msecs_to_jiffies(
543 init[i].retry_timeout * MSEC_PER_SEC);
544 }
545 return 0;
546
547out_error:
548 /* unwind the entries that succeeded */
549 for (i--; i >= 0; i--) {
550 cfg = &mp->m_error_cfg[class][i];
551 xfs_sysfs_del(&cfg->kobj);
552 }
553 xfs_sysfs_del(parent_kobj);
554 return error;
555}
556
557int
558xfs_error_sysfs_init(
559 struct xfs_mount *mp)
560{
561 int error;
562
563 /* .../xfs/<dev>/error/ */
564 error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
565 &mp->m_kobj, "error");
566 if (error)
567 return error;
568
569 error = sysfs_create_file(&mp->m_error_kobj.kobject,
570 ATTR_LIST(fail_at_unmount));
571
572 if (error)
573 goto out_error;
574
575 /* .../xfs/<dev>/error/metadata/ */
576 error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
577 "metadata", &mp->m_error_meta_kobj,
578 xfs_error_meta_init);
579 if (error)
580 goto out_error;
581
582 return 0;
583
584out_error:
585 xfs_sysfs_del(&mp->m_error_kobj);
586 return error;
587}
588
589void
590xfs_error_sysfs_del(
591 struct xfs_mount *mp)
592{
593 struct xfs_error_cfg *cfg;
594 int i, j;
595
596 for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
597 for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
598 cfg = &mp->m_error_cfg[i][j];
599
600 xfs_sysfs_del(&cfg->kobj);
601 }
602 }
603 xfs_sysfs_del(&mp->m_error_meta_kobj);
604 xfs_sysfs_del(&mp->m_error_kobj);
605}
606
607struct xfs_error_cfg *
608xfs_error_get_cfg(
609 struct xfs_mount *mp,
610 int error_class,
611 int error)
612{
613 struct xfs_error_cfg *cfg;
614
615 if (error < 0)
616 error = -error;
617
618 switch (error) {
619 case EIO:
620 cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
621 break;
622 case ENOSPC:
623 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
624 break;
625 case ENODEV:
626 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
627 break;
628 default:
629 cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
630 break;
631 }
632
633 return cfg;
634}
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}