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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
a31b1d3d BF |
2 | /* |
3 | * Copyright (c) 2014 Red Hat, Inc. | |
4 | * All Rights Reserved. | |
a31b1d3d BF |
5 | */ |
6 | ||
7 | #include "xfs.h" | |
192852be | 8 | #include "xfs_shared.h" |
801cc4e1 | 9 | #include "xfs_format.h" |
baff4e44 | 10 | #include "xfs_log_format.h" |
801cc4e1 | 11 | #include "xfs_trans_resv.h" |
192852be | 12 | #include "xfs_sysfs.h" |
0020a190 | 13 | #include "xfs_log.h" |
baff4e44 | 14 | #include "xfs_log_priv.h" |
801cc4e1 | 15 | #include "xfs_mount.h" |
a31b1d3d BF |
16 | |
17 | struct xfs_sysfs_attr { | |
18 | struct attribute attr; | |
a27c2640 BD |
19 | ssize_t (*show)(struct kobject *kobject, char *buf); |
20 | ssize_t (*store)(struct kobject *kobject, const char *buf, | |
21 | size_t count); | |
a31b1d3d BF |
22 | }; |
23 | ||
24 | static inline struct xfs_sysfs_attr * | |
25 | to_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) | |
bb230c12 BD |
34 | #define XFS_SYSFS_ATTR_WO(name) \ |
35 | static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name) | |
a31b1d3d BF |
36 | |
37 | #define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr | |
38 | ||
a27c2640 BD |
39 | STATIC ssize_t |
40 | xfs_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 | ||
50 | STATIC ssize_t | |
51 | xfs_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 | ||
62 | static const struct sysfs_ops xfs_sysfs_ops = { | |
63 | .show = xfs_sysfs_object_show, | |
64 | .store = xfs_sysfs_object_store, | |
65 | }; | |
66 | ||
801cc4e1 | 67 | static struct attribute *xfs_mp_attrs[] = { |
801cc4e1 BF |
68 | NULL, |
69 | }; | |
219aac5d | 70 | ATTRIBUTE_GROUPS(xfs_mp); |
801cc4e1 | 71 | |
2ee83335 | 72 | const struct kobj_type xfs_mp_ktype = { |
801cc4e1 BF |
73 | .release = xfs_sysfs_release, |
74 | .sysfs_ops = &xfs_sysfs_ops, | |
219aac5d | 75 | .default_groups = xfs_mp_groups, |
801cc4e1 BF |
76 | }; |
77 | ||
65b65735 BF |
78 | #ifdef DEBUG |
79 | /* debug */ | |
80 | ||
ccdab3d6 BF |
81 | STATIC ssize_t |
82 | bug_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 | ||
104 | STATIC ssize_t | |
105 | bug_on_assert_show( | |
106 | struct kobject *kobject, | |
107 | char *buf) | |
108 | { | |
53eb47b4 | 109 | return sysfs_emit(buf, "%d\n", xfs_globals.bug_on_assert); |
ccdab3d6 BF |
110 | } |
111 | XFS_SYSFS_ATTR_RW(bug_on_assert); | |
112 | ||
2e227178 BF |
113 | STATIC ssize_t |
114 | log_recovery_delay_store( | |
a27c2640 | 115 | struct kobject *kobject, |
2e227178 | 116 | const char *buf, |
a27c2640 | 117 | size_t count) |
2e227178 BF |
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 | ||
134 | STATIC ssize_t | |
135 | log_recovery_delay_show( | |
a27c2640 BD |
136 | struct kobject *kobject, |
137 | char *buf) | |
2e227178 | 138 | { |
53eb47b4 | 139 | return sysfs_emit(buf, "%d\n", xfs_globals.log_recovery_delay); |
2e227178 BF |
140 | } |
141 | XFS_SYSFS_ATTR_RW(log_recovery_delay); | |
142 | ||
dae5cd81 DC |
143 | STATIC ssize_t |
144 | mount_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 | ||
164 | STATIC ssize_t | |
165 | mount_delay_show( | |
166 | struct kobject *kobject, | |
167 | char *buf) | |
168 | { | |
53eb47b4 | 169 | return sysfs_emit(buf, "%d\n", xfs_globals.mount_delay); |
dae5cd81 DC |
170 | } |
171 | XFS_SYSFS_ATTR_RW(mount_delay); | |
172 | ||
66ae56a5 CH |
173 | static ssize_t |
174 | always_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 | ||
187 | static ssize_t | |
188 | always_cow_show( | |
189 | struct kobject *kobject, | |
190 | char *buf) | |
191 | { | |
53eb47b4 | 192 | return sysfs_emit(buf, "%d\n", xfs_globals.always_cow); |
66ae56a5 CH |
193 | } |
194 | XFS_SYSFS_ATTR_RW(always_cow); | |
195 | ||
40786717 DW |
196 | #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 | */ | |
202 | STATIC ssize_t | |
203 | pwork_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 | ||
223 | STATIC ssize_t | |
224 | pwork_threads_show( | |
225 | struct kobject *kobject, | |
226 | char *buf) | |
227 | { | |
53eb47b4 | 228 | return sysfs_emit(buf, "%d\n", xfs_globals.pwork_threads); |
40786717 DW |
229 | } |
230 | XFS_SYSFS_ATTR_RW(pwork_threads); | |
535e2f75 AH |
231 | |
232 | static ssize_t | |
233 | larp_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 | ||
246 | STATIC ssize_t | |
247 | larp_show( | |
248 | struct kobject *kobject, | |
249 | char *buf) | |
250 | { | |
251 | return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.larp); | |
252 | } | |
253 | XFS_SYSFS_ATTR_RW(larp); | |
40786717 DW |
254 | #endif /* DEBUG */ |
255 | ||
65b65735 | 256 | static struct attribute *xfs_dbg_attrs[] = { |
ccdab3d6 | 257 | ATTR_LIST(bug_on_assert), |
2e227178 | 258 | ATTR_LIST(log_recovery_delay), |
dae5cd81 | 259 | ATTR_LIST(mount_delay), |
66ae56a5 | 260 | ATTR_LIST(always_cow), |
40786717 DW |
261 | #ifdef DEBUG |
262 | ATTR_LIST(pwork_threads), | |
535e2f75 | 263 | ATTR_LIST(larp), |
40786717 | 264 | #endif |
65b65735 BF |
265 | NULL, |
266 | }; | |
219aac5d | 267 | ATTRIBUTE_GROUPS(xfs_dbg); |
65b65735 | 268 | |
2ee83335 | 269 | const struct kobj_type xfs_dbg_ktype = { |
65b65735 | 270 | .release = xfs_sysfs_release, |
a27c2640 | 271 | .sysfs_ops = &xfs_sysfs_ops, |
219aac5d | 272 | .default_groups = xfs_dbg_groups, |
65b65735 BF |
273 | }; |
274 | ||
275 | #endif /* DEBUG */ | |
276 | ||
bb230c12 BD |
277 | /* stats */ |
278 | ||
80529c45 BD |
279 | static inline struct xstats * |
280 | to_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 | ||
bb230c12 BD |
287 | STATIC ssize_t |
288 | stats_show( | |
a27c2640 BD |
289 | struct kobject *kobject, |
290 | char *buf) | |
bb230c12 | 291 | { |
80529c45 BD |
292 | struct xstats *stats = to_xstats(kobject); |
293 | ||
294 | return xfs_stats_format(stats->xs_stats, buf); | |
bb230c12 BD |
295 | } |
296 | XFS_SYSFS_ATTR_RO(stats); | |
297 | ||
298 | STATIC ssize_t | |
299 | stats_clear_store( | |
a27c2640 | 300 | struct kobject *kobject, |
bb230c12 | 301 | const char *buf, |
a27c2640 | 302 | size_t count) |
bb230c12 BD |
303 | { |
304 | int ret; | |
305 | int val; | |
80529c45 | 306 | struct xstats *stats = to_xstats(kobject); |
bb230c12 BD |
307 | |
308 | ret = kstrtoint(buf, 0, &val); | |
309 | if (ret) | |
310 | return ret; | |
311 | ||
312 | if (val != 1) | |
313 | return -EINVAL; | |
80529c45 BD |
314 | |
315 | xfs_stats_clearall(stats->xs_stats); | |
bb230c12 BD |
316 | return count; |
317 | } | |
318 | XFS_SYSFS_ATTR_WO(stats_clear); | |
319 | ||
320 | static struct attribute *xfs_stats_attrs[] = { | |
321 | ATTR_LIST(stats), | |
322 | ATTR_LIST(stats_clear), | |
323 | NULL, | |
324 | }; | |
219aac5d | 325 | ATTRIBUTE_GROUPS(xfs_stats); |
bb230c12 | 326 | |
2ee83335 | 327 | const struct kobj_type xfs_stats_ktype = { |
bb230c12 | 328 | .release = xfs_sysfs_release, |
a27c2640 | 329 | .sysfs_ops = &xfs_sysfs_ops, |
219aac5d | 330 | .default_groups = xfs_stats_groups, |
bb230c12 BD |
331 | }; |
332 | ||
baff4e44 BF |
333 | /* xlog */ |
334 | ||
a27c2640 BD |
335 | static inline struct xlog * |
336 | to_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 | ||
80d6d698 BF |
343 | STATIC ssize_t |
344 | log_head_lsn_show( | |
a27c2640 BD |
345 | struct kobject *kobject, |
346 | char *buf) | |
80d6d698 | 347 | { |
80d6d698 BF |
348 | int cycle; |
349 | int block; | |
a27c2640 | 350 | struct xlog *log = to_xlog(kobject); |
80d6d698 BF |
351 | |
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 | ||
53eb47b4 | 357 | return sysfs_emit(buf, "%d:%d\n", cycle, block); |
80d6d698 BF |
358 | } |
359 | XFS_SYSFS_ATTR_RO(log_head_lsn); | |
360 | ||
361 | STATIC ssize_t | |
362 | log_tail_lsn_show( | |
a27c2640 BD |
363 | struct kobject *kobject, |
364 | char *buf) | |
80d6d698 | 365 | { |
80d6d698 BF |
366 | int cycle; |
367 | int block; | |
a27c2640 | 368 | struct xlog *log = to_xlog(kobject); |
80d6d698 BF |
369 | |
370 | xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block); | |
53eb47b4 | 371 | return sysfs_emit(buf, "%d:%d\n", cycle, block); |
80d6d698 BF |
372 | } |
373 | XFS_SYSFS_ATTR_RO(log_tail_lsn); | |
374 | ||
375 | STATIC ssize_t | |
376 | reserve_grant_head_show( | |
a27c2640 BD |
377 | struct kobject *kobject, |
378 | char *buf) | |
379 | ||
80d6d698 | 380 | { |
80d6d698 BF |
381 | int cycle; |
382 | int bytes; | |
a27c2640 | 383 | struct xlog *log = to_xlog(kobject); |
80d6d698 BF |
384 | |
385 | xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes); | |
53eb47b4 | 386 | return sysfs_emit(buf, "%d:%d\n", cycle, bytes); |
80d6d698 BF |
387 | } |
388 | XFS_SYSFS_ATTR_RO(reserve_grant_head); | |
389 | ||
390 | STATIC ssize_t | |
391 | write_grant_head_show( | |
a27c2640 BD |
392 | struct kobject *kobject, |
393 | char *buf) | |
80d6d698 | 394 | { |
80d6d698 BF |
395 | int cycle; |
396 | int bytes; | |
a27c2640 | 397 | struct xlog *log = to_xlog(kobject); |
80d6d698 BF |
398 | |
399 | xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes); | |
53eb47b4 | 400 | return sysfs_emit(buf, "%d:%d\n", cycle, bytes); |
80d6d698 BF |
401 | } |
402 | XFS_SYSFS_ATTR_RO(write_grant_head); | |
403 | ||
baff4e44 | 404 | static struct attribute *xfs_log_attrs[] = { |
80d6d698 BF |
405 | ATTR_LIST(log_head_lsn), |
406 | ATTR_LIST(log_tail_lsn), | |
407 | ATTR_LIST(reserve_grant_head), | |
408 | ATTR_LIST(write_grant_head), | |
baff4e44 BF |
409 | NULL, |
410 | }; | |
219aac5d | 411 | ATTRIBUTE_GROUPS(xfs_log); |
baff4e44 | 412 | |
2ee83335 | 413 | const struct kobj_type xfs_log_ktype = { |
baff4e44 | 414 | .release = xfs_sysfs_release, |
a27c2640 | 415 | .sysfs_ops = &xfs_sysfs_ops, |
219aac5d | 416 | .default_groups = xfs_log_groups, |
baff4e44 | 417 | }; |
192852be CM |
418 | |
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 | */ | |
192852be CM |
429 | static inline struct xfs_error_cfg * |
430 | to_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 | ||
e6b3bb78 CM |
436 | static inline struct xfs_mount * |
437 | err_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 | ||
a5ea70d2 CM |
443 | static ssize_t |
444 | max_retries_show( | |
445 | struct kobject *kobject, | |
446 | char *buf) | |
447 | { | |
77169812 | 448 | int retries; |
a5ea70d2 CM |
449 | struct xfs_error_cfg *cfg = to_error_cfg(kobject); |
450 | ||
ff97f239 | 451 | if (cfg->max_retries == XFS_ERR_RETRY_FOREVER) |
77169812 ES |
452 | retries = -1; |
453 | else | |
454 | retries = cfg->max_retries; | |
455 | ||
53eb47b4 | 456 | return sysfs_emit(buf, "%d\n", retries); |
a5ea70d2 CM |
457 | } |
458 | ||
459 | static ssize_t | |
460 | max_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 | ||
77169812 | 476 | if (val == -1) |
ff97f239 | 477 | cfg->max_retries = XFS_ERR_RETRY_FOREVER; |
77169812 ES |
478 | else |
479 | cfg->max_retries = val; | |
a5ea70d2 CM |
480 | return count; |
481 | } | |
482 | XFS_SYSFS_ATTR_RW(max_retries); | |
483 | ||
484 | static ssize_t | |
485 | retry_timeout_seconds_show( | |
486 | struct kobject *kobject, | |
487 | char *buf) | |
488 | { | |
77169812 | 489 | int timeout; |
a5ea70d2 CM |
490 | struct xfs_error_cfg *cfg = to_error_cfg(kobject); |
491 | ||
77169812 ES |
492 | 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 | ||
53eb47b4 | 497 | return sysfs_emit(buf, "%d\n", timeout); |
a5ea70d2 CM |
498 | } |
499 | ||
500 | static ssize_t | |
501 | retry_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 | ||
77169812 ES |
514 | /* 1 day timeout maximum, -1 means infinite */ |
515 | if (val < -1 || val > 86400) | |
a5ea70d2 CM |
516 | return -EINVAL; |
517 | ||
77169812 ES |
518 | 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 | } | |
a5ea70d2 CM |
524 | return count; |
525 | } | |
526 | XFS_SYSFS_ATTR_RW(retry_timeout_seconds); | |
527 | ||
e6b3bb78 CM |
528 | static ssize_t |
529 | fail_at_unmount_show( | |
530 | struct kobject *kobject, | |
531 | char *buf) | |
532 | { | |
533 | struct xfs_mount *mp = err_to_mp(kobject); | |
534 | ||
53eb47b4 | 535 | return sysfs_emit(buf, "%d\n", mp->m_fail_unmount); |
e6b3bb78 CM |
536 | } |
537 | ||
538 | static ssize_t | |
539 | fail_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 | } | |
558 | XFS_SYSFS_ATTR_RW(fail_at_unmount); | |
559 | ||
a5ea70d2 CM |
560 | static struct attribute *xfs_error_attrs[] = { |
561 | ATTR_LIST(max_retries), | |
562 | ATTR_LIST(retry_timeout_seconds), | |
563 | NULL, | |
564 | }; | |
219aac5d | 565 | ATTRIBUTE_GROUPS(xfs_error); |
a5ea70d2 | 566 | |
2ee83335 | 567 | static const struct kobj_type xfs_error_cfg_ktype = { |
192852be CM |
568 | .release = xfs_sysfs_release, |
569 | .sysfs_ops = &xfs_sysfs_ops, | |
219aac5d | 570 | .default_groups = xfs_error_groups, |
192852be CM |
571 | }; |
572 | ||
2ee83335 | 573 | static const struct kobj_type xfs_error_ktype = { |
192852be | 574 | .release = xfs_sysfs_release, |
e6b3bb78 | 575 | .sysfs_ops = &xfs_sysfs_ops, |
192852be CM |
576 | }; |
577 | ||
ef6a50fb CM |
578 | /* |
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 | */ | |
584 | struct xfs_error_init { | |
585 | char *name; | |
586 | int max_retries; | |
a5ea70d2 | 587 | int retry_timeout; /* in seconds */ |
ef6a50fb CM |
588 | }; |
589 | ||
590 | static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = { | |
591 | { .name = "default", | |
e0a431b3 | 592 | .max_retries = XFS_ERR_RETRY_FOREVER, |
77169812 | 593 | .retry_timeout = XFS_ERR_RETRY_FOREVER, |
ef6a50fb | 594 | }, |
e0a431b3 CM |
595 | { .name = "EIO", |
596 | .max_retries = XFS_ERR_RETRY_FOREVER, | |
77169812 | 597 | .retry_timeout = XFS_ERR_RETRY_FOREVER, |
e0a431b3 CM |
598 | }, |
599 | { .name = "ENOSPC", | |
600 | .max_retries = XFS_ERR_RETRY_FOREVER, | |
77169812 | 601 | .retry_timeout = XFS_ERR_RETRY_FOREVER, |
e0a431b3 CM |
602 | }, |
603 | { .name = "ENODEV", | |
77169812 ES |
604 | .max_retries = 0, /* We can't recover from devices disappearing */ |
605 | .retry_timeout = 0, | |
e0a431b3 | 606 | }, |
ef6a50fb CM |
607 | }; |
608 | ||
609 | static int | |
610 | xfs_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; | |
77169812 ES |
636 | 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( | |
a5ea70d2 | 640 | init[i].retry_timeout * MSEC_PER_SEC); |
ef6a50fb CM |
641 | } |
642 | return 0; | |
643 | ||
644 | out_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 | ||
192852be CM |
654 | int |
655 | xfs_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"); | |
ffd40ef6 CM |
663 | if (error) |
664 | return error; | |
665 | ||
e6b3bb78 CM |
666 | error = sysfs_create_file(&mp->m_error_kobj.kobject, |
667 | ATTR_LIST(fail_at_unmount)); | |
668 | ||
669 | if (error) | |
670 | goto out_error; | |
671 | ||
ffd40ef6 | 672 | /* .../xfs/<dev>/error/metadata/ */ |
ef6a50fb CM |
673 | error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA, |
674 | "metadata", &mp->m_error_meta_kobj, | |
675 | xfs_error_meta_init); | |
ffd40ef6 CM |
676 | if (error) |
677 | goto out_error; | |
678 | ||
ffd40ef6 CM |
679 | return 0; |
680 | ||
ffd40ef6 CM |
681 | out_error: |
682 | xfs_sysfs_del(&mp->m_error_kobj); | |
192852be CM |
683 | return error; |
684 | } | |
685 | ||
686 | void | |
687 | xfs_error_sysfs_del( | |
688 | struct xfs_mount *mp) | |
689 | { | |
ffd40ef6 CM |
690 | 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); | |
192852be CM |
701 | xfs_sysfs_del(&mp->m_error_kobj); |
702 | } | |
df309390 CM |
703 | |
704 | struct xfs_error_cfg * | |
705 | xfs_error_get_cfg( | |
706 | struct xfs_mount *mp, | |
707 | int error_class, | |
708 | int error) | |
709 | { | |
710 | struct xfs_error_cfg *cfg; | |
711 | ||
e97f6c54 ES |
712 | if (error < 0) |
713 | error = -error; | |
714 | ||
df309390 | 715 | switch (error) { |
e0a431b3 CM |
716 | 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; | |
df309390 CM |
725 | default: |
726 | cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT]; | |
727 | break; | |
728 | } | |
729 | ||
730 | return cfg; | |
731 | } |