blob: f7faf6e70d7f3ef31423116b5bfc95e19f8794aa [file] [log] [blame]
Dave Chinner0b61f8a2018-06-05 19:42:14 -07001// SPDX-License-Identifier: GPL-2.0
Brian Fostera31b1d32014-07-15 08:07:01 +10002/*
3 * Copyright (c) 2014 Red Hat, Inc.
4 * All Rights Reserved.
Brian Fostera31b1d32014-07-15 08:07:01 +10005 */
6
7#include "xfs.h"
Carlos Maiolino192852b2016-05-18 10:58:51 +10008#include "xfs_shared.h"
Brian Foster801cc4e2016-03-15 11:42:44 +11009#include "xfs_format.h"
Brian Fosterbaff4e42014-07-15 08:07:29 +100010#include "xfs_log_format.h"
Brian Foster801cc4e2016-03-15 11:42:44 +110011#include "xfs_trans_resv.h"
Carlos Maiolino192852b2016-05-18 10:58:51 +100012#include "xfs_sysfs.h"
Dave Chinner0020a192021-08-10 18:00:44 -070013#include "xfs_log.h"
Brian Fosterbaff4e42014-07-15 08:07:29 +100014#include "xfs_log_priv.h"
Brian Foster801cc4e2016-03-15 11:42:44 +110015#include "xfs_mount.h"
Brian Fostera31b1d32014-07-15 08:07:01 +100016
17struct xfs_sysfs_attr {
18 struct attribute attr;
Bill O'Donnella27c26402015-10-12 05:18:45 +110019 ssize_t (*show)(struct kobject *kobject, char *buf);
20 ssize_t (*store)(struct kobject *kobject, const char *buf,
21 size_t count);
Brian Fostera31b1d32014-07-15 08:07:01 +100022};
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)
Bill O'Donnellbb230c12015-10-12 05:15:45 +110034#define XFS_SYSFS_ATTR_WO(name) \
35 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)
Brian Fostera31b1d32014-07-15 08:07:01 +100036
37#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
38
Bill O'Donnella27c26402015-10-12 05:18:45 +110039STATIC 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
Brian Foster801cc4e2016-03-15 11:42:44 +110067static struct attribute *xfs_mp_attrs[] = {
Brian Foster801cc4e2016-03-15 11:42:44 +110068 NULL,
69};
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -080070ATTRIBUTE_GROUPS(xfs_mp);
Brian Foster801cc4e2016-03-15 11:42:44 +110071
72struct kobj_type xfs_mp_ktype = {
73 .release = xfs_sysfs_release,
74 .sysfs_ops = &xfs_sysfs_ops,
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -080075 .default_groups = xfs_mp_groups,
Brian Foster801cc4e2016-03-15 11:42:44 +110076};
77
Brian Foster65b65732014-09-09 11:52:42 +100078#ifdef DEBUG
79/* debug */
80
Brian Foster2e227172014-09-09 11:56:13 +100081STATIC ssize_t
Brian Fosterccdab3d2017-06-14 21:29:12 -070082bug_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{
Qing Wang53eb47b2021-10-14 09:37:03 -0700109 return sysfs_emit(buf, "%d\n", xfs_globals.bug_on_assert);
Brian Fosterccdab3d2017-06-14 21:29:12 -0700110}
111XFS_SYSFS_ATTR_RW(bug_on_assert);
112
113STATIC ssize_t
Brian Foster2e227172014-09-09 11:56:13 +1000114log_recovery_delay_store(
Bill O'Donnella27c26402015-10-12 05:18:45 +1100115 struct kobject *kobject,
Brian Foster2e227172014-09-09 11:56:13 +1000116 const char *buf,
Bill O'Donnella27c26402015-10-12 05:18:45 +1100117 size_t count)
Brian Foster2e227172014-09-09 11:56:13 +1000118{
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(
Bill O'Donnella27c26402015-10-12 05:18:45 +1100136 struct kobject *kobject,
137 char *buf)
Brian Foster2e227172014-09-09 11:56:13 +1000138{
Qing Wang53eb47b2021-10-14 09:37:03 -0700139 return sysfs_emit(buf, "%d\n", xfs_globals.log_recovery_delay);
Brian Foster2e227172014-09-09 11:56:13 +1000140}
141XFS_SYSFS_ATTR_RW(log_recovery_delay);
142
Dave Chinnerdae5cd82018-05-10 21:50:23 -0700143STATIC 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{
Qing Wang53eb47b2021-10-14 09:37:03 -0700169 return sysfs_emit(buf, "%d\n", xfs_globals.mount_delay);
Dave Chinnerdae5cd82018-05-10 21:50:23 -0700170}
171XFS_SYSFS_ATTR_RW(mount_delay);
172
Christoph Hellwig66ae56a2019-02-18 09:38:49 -0800173static 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{
Qing Wang53eb47b2021-10-14 09:37:03 -0700192 return sysfs_emit(buf, "%d\n", xfs_globals.always_cow);
Christoph Hellwig66ae56a2019-02-18 09:38:49 -0800193}
194XFS_SYSFS_ATTR_RW(always_cow);
195
Darrick J. Wong40786712019-07-03 07:33:26 -0700196#ifdef DEBUG
197/*
198 * Override how many threads the parallel work queue is allowed to create.
199 * This has to be a debug-only global (instead of an errortag) because one of
200 * the main users of parallel workqueues is mount time quotacheck.
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{
Qing Wang53eb47b2021-10-14 09:37:03 -0700228 return sysfs_emit(buf, "%d\n", xfs_globals.pwork_threads);
Darrick J. Wong40786712019-07-03 07:33:26 -0700229}
230XFS_SYSFS_ATTR_RW(pwork_threads);
Allison Henderson535e2f72022-05-11 17:01:22 +1000231
232static ssize_t
233larp_store(
234 struct kobject *kobject,
235 const char *buf,
236 size_t count)
237{
238 ssize_t ret;
239
240 ret = kstrtobool(buf, &xfs_globals.larp);
241 if (ret < 0)
242 return ret;
243 return count;
244}
245
246STATIC ssize_t
247larp_show(
248 struct kobject *kobject,
249 char *buf)
250{
251 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.larp);
252}
253XFS_SYSFS_ATTR_RW(larp);
Darrick J. Wong40786712019-07-03 07:33:26 -0700254#endif /* DEBUG */
255
Brian Foster65b65732014-09-09 11:52:42 +1000256static struct attribute *xfs_dbg_attrs[] = {
Brian Fosterccdab3d2017-06-14 21:29:12 -0700257 ATTR_LIST(bug_on_assert),
Brian Foster2e227172014-09-09 11:56:13 +1000258 ATTR_LIST(log_recovery_delay),
Dave Chinnerdae5cd82018-05-10 21:50:23 -0700259 ATTR_LIST(mount_delay),
Christoph Hellwig66ae56a2019-02-18 09:38:49 -0800260 ATTR_LIST(always_cow),
Darrick J. Wong40786712019-07-03 07:33:26 -0700261#ifdef DEBUG
262 ATTR_LIST(pwork_threads),
Allison Henderson535e2f72022-05-11 17:01:22 +1000263 ATTR_LIST(larp),
Darrick J. Wong40786712019-07-03 07:33:26 -0700264#endif
Brian Foster65b65732014-09-09 11:52:42 +1000265 NULL,
266};
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -0800267ATTRIBUTE_GROUPS(xfs_dbg);
Brian Foster65b65732014-09-09 11:52:42 +1000268
Brian Foster65b65732014-09-09 11:52:42 +1000269struct kobj_type xfs_dbg_ktype = {
270 .release = xfs_sysfs_release,
Bill O'Donnella27c26402015-10-12 05:18:45 +1100271 .sysfs_ops = &xfs_sysfs_ops,
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -0800272 .default_groups = xfs_dbg_groups,
Brian Foster65b65732014-09-09 11:52:42 +1000273};
274
275#endif /* DEBUG */
276
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100277/* stats */
278
Bill O'Donnell80529c42015-10-12 05:19:45 +1100279static inline struct xstats *
280to_xstats(struct kobject *kobject)
281{
282 struct xfs_kobj *kobj = to_kobj(kobject);
283
284 return container_of(kobj, struct xstats, xs_kobj);
285}
286
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100287STATIC ssize_t
288stats_show(
Bill O'Donnella27c26402015-10-12 05:18:45 +1100289 struct kobject *kobject,
290 char *buf)
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100291{
Bill O'Donnell80529c42015-10-12 05:19:45 +1100292 struct xstats *stats = to_xstats(kobject);
293
294 return xfs_stats_format(stats->xs_stats, buf);
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100295}
296XFS_SYSFS_ATTR_RO(stats);
297
298STATIC ssize_t
299stats_clear_store(
Bill O'Donnella27c26402015-10-12 05:18:45 +1100300 struct kobject *kobject,
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100301 const char *buf,
Bill O'Donnella27c26402015-10-12 05:18:45 +1100302 size_t count)
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100303{
304 int ret;
305 int val;
Bill O'Donnell80529c42015-10-12 05:19:45 +1100306 struct xstats *stats = to_xstats(kobject);
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100307
308 ret = kstrtoint(buf, 0, &val);
309 if (ret)
310 return ret;
311
312 if (val != 1)
313 return -EINVAL;
Bill O'Donnell80529c42015-10-12 05:19:45 +1100314
315 xfs_stats_clearall(stats->xs_stats);
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100316 return count;
317}
318XFS_SYSFS_ATTR_WO(stats_clear);
319
320static struct attribute *xfs_stats_attrs[] = {
321 ATTR_LIST(stats),
322 ATTR_LIST(stats_clear),
323 NULL,
324};
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -0800325ATTRIBUTE_GROUPS(xfs_stats);
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100326
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100327struct kobj_type xfs_stats_ktype = {
328 .release = xfs_sysfs_release,
Bill O'Donnella27c26402015-10-12 05:18:45 +1100329 .sysfs_ops = &xfs_sysfs_ops,
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -0800330 .default_groups = xfs_stats_groups,
Bill O'Donnellbb230c12015-10-12 05:15:45 +1100331};
332
Brian Fosterbaff4e42014-07-15 08:07:29 +1000333/* xlog */
334
Bill O'Donnella27c26402015-10-12 05:18:45 +1100335static inline struct xlog *
336to_xlog(struct kobject *kobject)
337{
338 struct xfs_kobj *kobj = to_kobj(kobject);
339
340 return container_of(kobj, struct xlog, l_kobj);
341}
342
Brian Foster80d6d692014-07-15 08:07:48 +1000343STATIC ssize_t
344log_head_lsn_show(
Bill O'Donnella27c26402015-10-12 05:18:45 +1100345 struct kobject *kobject,
346 char *buf)
Brian Foster80d6d692014-07-15 08:07:48 +1000347{
Brian Foster80d6d692014-07-15 08:07:48 +1000348 int cycle;
349 int block;
Bill O'Donnella27c26402015-10-12 05:18:45 +1100350 struct xlog *log = to_xlog(kobject);
Brian Foster80d6d692014-07-15 08:07:48 +1000351
352 spin_lock(&log->l_icloglock);
353 cycle = log->l_curr_cycle;
354 block = log->l_curr_block;
355 spin_unlock(&log->l_icloglock);
356
Qing Wang53eb47b2021-10-14 09:37:03 -0700357 return sysfs_emit(buf, "%d:%d\n", cycle, block);
Brian Foster80d6d692014-07-15 08:07:48 +1000358}
359XFS_SYSFS_ATTR_RO(log_head_lsn);
360
361STATIC ssize_t
362log_tail_lsn_show(
Bill O'Donnella27c26402015-10-12 05:18:45 +1100363 struct kobject *kobject,
364 char *buf)
Brian Foster80d6d692014-07-15 08:07:48 +1000365{
Brian Foster80d6d692014-07-15 08:07:48 +1000366 int cycle;
367 int block;
Bill O'Donnella27c26402015-10-12 05:18:45 +1100368 struct xlog *log = to_xlog(kobject);
Brian Foster80d6d692014-07-15 08:07:48 +1000369
370 xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
Qing Wang53eb47b2021-10-14 09:37:03 -0700371 return sysfs_emit(buf, "%d:%d\n", cycle, block);
Brian Foster80d6d692014-07-15 08:07:48 +1000372}
373XFS_SYSFS_ATTR_RO(log_tail_lsn);
374
375STATIC ssize_t
376reserve_grant_head_show(
Bill O'Donnella27c26402015-10-12 05:18:45 +1100377 struct kobject *kobject,
378 char *buf)
379
Brian Foster80d6d692014-07-15 08:07:48 +1000380{
Brian Foster80d6d692014-07-15 08:07:48 +1000381 int cycle;
382 int bytes;
Bill O'Donnella27c26402015-10-12 05:18:45 +1100383 struct xlog *log = to_xlog(kobject);
Brian Foster80d6d692014-07-15 08:07:48 +1000384
385 xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
Qing Wang53eb47b2021-10-14 09:37:03 -0700386 return sysfs_emit(buf, "%d:%d\n", cycle, bytes);
Brian Foster80d6d692014-07-15 08:07:48 +1000387}
388XFS_SYSFS_ATTR_RO(reserve_grant_head);
389
390STATIC ssize_t
391write_grant_head_show(
Bill O'Donnella27c26402015-10-12 05:18:45 +1100392 struct kobject *kobject,
393 char *buf)
Brian Foster80d6d692014-07-15 08:07:48 +1000394{
Brian Foster80d6d692014-07-15 08:07:48 +1000395 int cycle;
396 int bytes;
Bill O'Donnella27c26402015-10-12 05:18:45 +1100397 struct xlog *log = to_xlog(kobject);
Brian Foster80d6d692014-07-15 08:07:48 +1000398
399 xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
Qing Wang53eb47b2021-10-14 09:37:03 -0700400 return sysfs_emit(buf, "%d:%d\n", cycle, bytes);
Brian Foster80d6d692014-07-15 08:07:48 +1000401}
402XFS_SYSFS_ATTR_RO(write_grant_head);
403
Brian Fosterbaff4e42014-07-15 08:07:29 +1000404static struct attribute *xfs_log_attrs[] = {
Brian Foster80d6d692014-07-15 08:07:48 +1000405 ATTR_LIST(log_head_lsn),
406 ATTR_LIST(log_tail_lsn),
407 ATTR_LIST(reserve_grant_head),
408 ATTR_LIST(write_grant_head),
Brian Fosterbaff4e42014-07-15 08:07:29 +1000409 NULL,
410};
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -0800411ATTRIBUTE_GROUPS(xfs_log);
Brian Fosterbaff4e42014-07-15 08:07:29 +1000412
Brian Fosterbaff4e42014-07-15 08:07:29 +1000413struct kobj_type xfs_log_ktype = {
414 .release = xfs_sysfs_release,
Bill O'Donnella27c26402015-10-12 05:18:45 +1100415 .sysfs_ops = &xfs_sysfs_ops,
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -0800416 .default_groups = xfs_log_groups,
Brian Fosterbaff4e42014-07-15 08:07:29 +1000417};
Carlos Maiolino192852b2016-05-18 10:58:51 +1000418
419/*
420 * Metadata IO error configuration
421 *
422 * The sysfs structure here is:
423 * ...xfs/<dev>/error/<class>/<errno>/<error_attrs>
424 *
425 * where <class> allows us to discriminate between data IO and metadata IO,
426 * and any other future type of IO (e.g. special inode or directory error
427 * handling) we care to support.
428 */
Carlos Maiolino192852b2016-05-18 10:58:51 +1000429static inline struct xfs_error_cfg *
430to_error_cfg(struct kobject *kobject)
431{
432 struct xfs_kobj *kobj = to_kobj(kobject);
433 return container_of(kobj, struct xfs_error_cfg, kobj);
434}
435
Carlos Maiolinoe6b3bb72016-05-18 11:11:27 +1000436static inline struct xfs_mount *
437err_to_mp(struct kobject *kobject)
438{
439 struct xfs_kobj *kobj = to_kobj(kobject);
440 return container_of(kobj, struct xfs_mount, m_error_kobj);
441}
442
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000443static ssize_t
444max_retries_show(
445 struct kobject *kobject,
446 char *buf)
447{
Eric Sandeen77169812016-09-14 07:51:30 +1000448 int retries;
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000449 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
450
Carlos Maiolinoff97f232017-01-03 20:34:17 -0800451 if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
Eric Sandeen77169812016-09-14 07:51:30 +1000452 retries = -1;
453 else
454 retries = cfg->max_retries;
455
Qing Wang53eb47b2021-10-14 09:37:03 -0700456 return sysfs_emit(buf, "%d\n", retries);
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000457}
458
459static ssize_t
460max_retries_store(
461 struct kobject *kobject,
462 const char *buf,
463 size_t count)
464{
465 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
466 int ret;
467 int val;
468
469 ret = kstrtoint(buf, 0, &val);
470 if (ret)
471 return ret;
472
473 if (val < -1)
474 return -EINVAL;
475
Eric Sandeen77169812016-09-14 07:51:30 +1000476 if (val == -1)
Carlos Maiolinoff97f232017-01-03 20:34:17 -0800477 cfg->max_retries = XFS_ERR_RETRY_FOREVER;
Eric Sandeen77169812016-09-14 07:51:30 +1000478 else
479 cfg->max_retries = val;
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000480 return count;
481}
482XFS_SYSFS_ATTR_RW(max_retries);
483
484static ssize_t
485retry_timeout_seconds_show(
486 struct kobject *kobject,
487 char *buf)
488{
Eric Sandeen77169812016-09-14 07:51:30 +1000489 int timeout;
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000490 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
491
Eric Sandeen77169812016-09-14 07:51:30 +1000492 if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
493 timeout = -1;
494 else
495 timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
496
Qing Wang53eb47b2021-10-14 09:37:03 -0700497 return sysfs_emit(buf, "%d\n", timeout);
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000498}
499
500static ssize_t
501retry_timeout_seconds_store(
502 struct kobject *kobject,
503 const char *buf,
504 size_t count)
505{
506 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
507 int ret;
508 int val;
509
510 ret = kstrtoint(buf, 0, &val);
511 if (ret)
512 return ret;
513
Eric Sandeen77169812016-09-14 07:51:30 +1000514 /* 1 day timeout maximum, -1 means infinite */
515 if (val < -1 || val > 86400)
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000516 return -EINVAL;
517
Eric Sandeen77169812016-09-14 07:51:30 +1000518 if (val == -1)
519 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
520 else {
521 cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
522 ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
523 }
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000524 return count;
525}
526XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
527
Carlos Maiolinoe6b3bb72016-05-18 11:11:27 +1000528static ssize_t
529fail_at_unmount_show(
530 struct kobject *kobject,
531 char *buf)
532{
533 struct xfs_mount *mp = err_to_mp(kobject);
534
Qing Wang53eb47b2021-10-14 09:37:03 -0700535 return sysfs_emit(buf, "%d\n", mp->m_fail_unmount);
Carlos Maiolinoe6b3bb72016-05-18 11:11:27 +1000536}
537
538static ssize_t
539fail_at_unmount_store(
540 struct kobject *kobject,
541 const char *buf,
542 size_t count)
543{
544 struct xfs_mount *mp = err_to_mp(kobject);
545 int ret;
546 int val;
547
548 ret = kstrtoint(buf, 0, &val);
549 if (ret)
550 return ret;
551
552 if (val < 0 || val > 1)
553 return -EINVAL;
554
555 mp->m_fail_unmount = val;
556 return count;
557}
558XFS_SYSFS_ATTR_RW(fail_at_unmount);
559
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000560static struct attribute *xfs_error_attrs[] = {
561 ATTR_LIST(max_retries),
562 ATTR_LIST(retry_timeout_seconds),
563 NULL,
564};
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -0800565ATTRIBUTE_GROUPS(xfs_error);
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000566
Eric Biggersf1b82432016-10-20 15:42:30 +1100567static struct kobj_type xfs_error_cfg_ktype = {
Carlos Maiolino192852b2016-05-18 10:58:51 +1000568 .release = xfs_sysfs_release,
569 .sysfs_ops = &xfs_sysfs_ops,
Greg Kroah-Hartman219aac52022-01-03 11:10:18 -0800570 .default_groups = xfs_error_groups,
Carlos Maiolino192852b2016-05-18 10:58:51 +1000571};
572
Eric Biggersf1b82432016-10-20 15:42:30 +1100573static struct kobj_type xfs_error_ktype = {
Carlos Maiolino192852b2016-05-18 10:58:51 +1000574 .release = xfs_sysfs_release,
Carlos Maiolinoe6b3bb72016-05-18 11:11:27 +1000575 .sysfs_ops = &xfs_sysfs_ops,
Carlos Maiolino192852b2016-05-18 10:58:51 +1000576};
577
Carlos Maiolinoef6a50f2016-05-18 11:06:44 +1000578/*
579 * Error initialization tables. These need to be ordered in the same
580 * order as the enums used to index the array. All class init tables need to
581 * define a "default" behaviour as the first entry, all other entries can be
582 * empty.
583 */
584struct xfs_error_init {
585 char *name;
586 int max_retries;
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000587 int retry_timeout; /* in seconds */
Carlos Maiolinoef6a50f2016-05-18 11:06:44 +1000588};
589
590static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
591 { .name = "default",
Carlos Maiolinoe0a431b32016-05-18 11:09:28 +1000592 .max_retries = XFS_ERR_RETRY_FOREVER,
Eric Sandeen77169812016-09-14 07:51:30 +1000593 .retry_timeout = XFS_ERR_RETRY_FOREVER,
Carlos Maiolinoef6a50f2016-05-18 11:06:44 +1000594 },
Carlos Maiolinoe0a431b32016-05-18 11:09:28 +1000595 { .name = "EIO",
596 .max_retries = XFS_ERR_RETRY_FOREVER,
Eric Sandeen77169812016-09-14 07:51:30 +1000597 .retry_timeout = XFS_ERR_RETRY_FOREVER,
Carlos Maiolinoe0a431b32016-05-18 11:09:28 +1000598 },
599 { .name = "ENOSPC",
600 .max_retries = XFS_ERR_RETRY_FOREVER,
Eric Sandeen77169812016-09-14 07:51:30 +1000601 .retry_timeout = XFS_ERR_RETRY_FOREVER,
Carlos Maiolinoe0a431b32016-05-18 11:09:28 +1000602 },
603 { .name = "ENODEV",
Eric Sandeen77169812016-09-14 07:51:30 +1000604 .max_retries = 0, /* We can't recover from devices disappearing */
605 .retry_timeout = 0,
Carlos Maiolinoe0a431b32016-05-18 11:09:28 +1000606 },
Carlos Maiolinoef6a50f2016-05-18 11:06:44 +1000607};
608
609static int
610xfs_error_sysfs_init_class(
611 struct xfs_mount *mp,
612 int class,
613 const char *parent_name,
614 struct xfs_kobj *parent_kobj,
615 const struct xfs_error_init init[])
616{
617 struct xfs_error_cfg *cfg;
618 int error;
619 int i;
620
621 ASSERT(class < XFS_ERR_CLASS_MAX);
622
623 error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
624 &mp->m_error_kobj, parent_name);
625 if (error)
626 return error;
627
628 for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
629 cfg = &mp->m_error_cfg[class][i];
630 error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
631 parent_kobj, init[i].name);
632 if (error)
633 goto out_error;
634
635 cfg->max_retries = init[i].max_retries;
Eric Sandeen77169812016-09-14 07:51:30 +1000636 if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
637 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
638 else
639 cfg->retry_timeout = msecs_to_jiffies(
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +1000640 init[i].retry_timeout * MSEC_PER_SEC);
Carlos Maiolinoef6a50f2016-05-18 11:06:44 +1000641 }
642 return 0;
643
644out_error:
645 /* unwind the entries that succeeded */
646 for (i--; i >= 0; i--) {
647 cfg = &mp->m_error_cfg[class][i];
648 xfs_sysfs_del(&cfg->kobj);
649 }
650 xfs_sysfs_del(parent_kobj);
651 return error;
652}
653
Carlos Maiolino192852b2016-05-18 10:58:51 +1000654int
655xfs_error_sysfs_init(
656 struct xfs_mount *mp)
657{
658 int error;
659
660 /* .../xfs/<dev>/error/ */
661 error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
662 &mp->m_kobj, "error");
Carlos Maiolinoffd40ef2016-05-18 11:01:00 +1000663 if (error)
664 return error;
665
Carlos Maiolinoe6b3bb72016-05-18 11:11:27 +1000666 error = sysfs_create_file(&mp->m_error_kobj.kobject,
667 ATTR_LIST(fail_at_unmount));
668
669 if (error)
670 goto out_error;
671
Carlos Maiolinoffd40ef2016-05-18 11:01:00 +1000672 /* .../xfs/<dev>/error/metadata/ */
Carlos Maiolinoef6a50f2016-05-18 11:06:44 +1000673 error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
674 "metadata", &mp->m_error_meta_kobj,
675 xfs_error_meta_init);
Carlos Maiolinoffd40ef2016-05-18 11:01:00 +1000676 if (error)
677 goto out_error;
678
Carlos Maiolinoffd40ef2016-05-18 11:01:00 +1000679 return 0;
680
Carlos Maiolinoffd40ef2016-05-18 11:01:00 +1000681out_error:
682 xfs_sysfs_del(&mp->m_error_kobj);
Carlos Maiolino192852b2016-05-18 10:58:51 +1000683 return error;
684}
685
686void
687xfs_error_sysfs_del(
688 struct xfs_mount *mp)
689{
Carlos Maiolinoffd40ef2016-05-18 11:01:00 +1000690 struct xfs_error_cfg *cfg;
691 int i, j;
692
693 for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
694 for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
695 cfg = &mp->m_error_cfg[i][j];
696
697 xfs_sysfs_del(&cfg->kobj);
698 }
699 }
700 xfs_sysfs_del(&mp->m_error_meta_kobj);
Carlos Maiolino192852b2016-05-18 10:58:51 +1000701 xfs_sysfs_del(&mp->m_error_kobj);
702}
Carlos Maiolinodf309392016-05-18 11:05:33 +1000703
704struct xfs_error_cfg *
705xfs_error_get_cfg(
706 struct xfs_mount *mp,
707 int error_class,
708 int error)
709{
710 struct xfs_error_cfg *cfg;
711
Eric Sandeene97f6c52016-07-20 10:48:51 +1000712 if (error < 0)
713 error = -error;
714
Carlos Maiolinodf309392016-05-18 11:05:33 +1000715 switch (error) {
Carlos Maiolinoe0a431b32016-05-18 11:09:28 +1000716 case EIO:
717 cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
718 break;
719 case ENOSPC:
720 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
721 break;
722 case ENODEV:
723 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
724 break;
Carlos Maiolinodf309392016-05-18 11:05:33 +1000725 default:
726 cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
727 break;
728 }
729
730 return cfg;
731}