2 * Copyright (c) 2014 Red Hat, Inc.
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.
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.
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
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"
26 #include "xfs_log_priv.h"
27 #include "xfs_stats.h"
28 #include "xfs_mount.h"
30 struct 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,
37 static inline struct xfs_sysfs_attr *
38 to_attr(struct attribute *attr)
40 return container_of(attr, struct xfs_sysfs_attr, attr);
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)
50 #define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
53 xfs_sysfs_object_show(
54 struct kobject *kobject,
55 struct attribute *attr,
58 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
60 return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
64 xfs_sysfs_object_store(
65 struct kobject *kobject,
66 struct attribute *attr,
70 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
72 return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
75 static const struct sysfs_ops xfs_sysfs_ops = {
76 .show = xfs_sysfs_object_show,
77 .store = xfs_sysfs_object_store,
81 * xfs_mount kobject. The mp kobject also serves as the per-mount parent object
82 * that is identified by the fsname under sysfs.
85 static inline struct xfs_mount *
86 to_mp(struct kobject *kobject)
88 struct xfs_kobj *kobj = to_kobj(kobject);
90 return container_of(kobj, struct xfs_mount, m_kobj);
97 struct kobject *kobject,
101 struct xfs_mount *mp = to_mp(kobject);
105 ret = kstrtoint(buf, 0, &val);
110 mp->m_fail_writes = true;
112 mp->m_fail_writes = false;
121 struct kobject *kobject,
124 struct xfs_mount *mp = to_mp(kobject);
126 return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_writes ? 1 : 0);
128 XFS_SYSFS_ATTR_RW(fail_writes);
132 static struct attribute *xfs_mp_attrs[] = {
134 ATTR_LIST(fail_writes),
139 struct kobj_type xfs_mp_ktype = {
140 .release = xfs_sysfs_release,
141 .sysfs_ops = &xfs_sysfs_ops,
142 .default_attrs = xfs_mp_attrs,
149 log_recovery_delay_store(
150 struct kobject *kobject,
157 ret = kstrtoint(buf, 0, &val);
161 if (val < 0 || val > 60)
164 xfs_globals.log_recovery_delay = val;
170 log_recovery_delay_show(
171 struct kobject *kobject,
174 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
176 XFS_SYSFS_ATTR_RW(log_recovery_delay);
178 static struct attribute *xfs_dbg_attrs[] = {
179 ATTR_LIST(log_recovery_delay),
183 struct kobj_type xfs_dbg_ktype = {
184 .release = xfs_sysfs_release,
185 .sysfs_ops = &xfs_sysfs_ops,
186 .default_attrs = xfs_dbg_attrs,
193 static inline struct xstats *
194 to_xstats(struct kobject *kobject)
196 struct xfs_kobj *kobj = to_kobj(kobject);
198 return container_of(kobj, struct xstats, xs_kobj);
203 struct kobject *kobject,
206 struct xstats *stats = to_xstats(kobject);
208 return xfs_stats_format(stats->xs_stats, buf);
210 XFS_SYSFS_ATTR_RO(stats);
214 struct kobject *kobject,
220 struct xstats *stats = to_xstats(kobject);
222 ret = kstrtoint(buf, 0, &val);
229 xfs_stats_clearall(stats->xs_stats);
232 XFS_SYSFS_ATTR_WO(stats_clear);
234 static struct attribute *xfs_stats_attrs[] = {
236 ATTR_LIST(stats_clear),
240 struct kobj_type xfs_stats_ktype = {
241 .release = xfs_sysfs_release,
242 .sysfs_ops = &xfs_sysfs_ops,
243 .default_attrs = xfs_stats_attrs,
248 static inline struct xlog *
249 to_xlog(struct kobject *kobject)
251 struct xfs_kobj *kobj = to_kobj(kobject);
253 return container_of(kobj, struct xlog, l_kobj);
258 struct kobject *kobject,
263 struct xlog *log = to_xlog(kobject);
265 spin_lock(&log->l_icloglock);
266 cycle = log->l_curr_cycle;
267 block = log->l_curr_block;
268 spin_unlock(&log->l_icloglock);
270 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
272 XFS_SYSFS_ATTR_RO(log_head_lsn);
276 struct kobject *kobject,
281 struct xlog *log = to_xlog(kobject);
283 xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
284 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
286 XFS_SYSFS_ATTR_RO(log_tail_lsn);
289 reserve_grant_head_show(
290 struct kobject *kobject,
296 struct xlog *log = to_xlog(kobject);
298 xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
299 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
301 XFS_SYSFS_ATTR_RO(reserve_grant_head);
304 write_grant_head_show(
305 struct kobject *kobject,
310 struct xlog *log = to_xlog(kobject);
312 xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
313 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
315 XFS_SYSFS_ATTR_RO(write_grant_head);
319 log_badcrc_factor_store(
320 struct kobject *kobject,
324 struct xlog *log = to_xlog(kobject);
328 ret = kstrtouint(buf, 0, &val);
332 log->l_badcrc_factor = val;
338 log_badcrc_factor_show(
339 struct kobject *kobject,
342 struct xlog *log = to_xlog(kobject);
344 return snprintf(buf, PAGE_SIZE, "%d\n", log->l_badcrc_factor);
347 XFS_SYSFS_ATTR_RW(log_badcrc_factor);
350 static 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),
356 ATTR_LIST(log_badcrc_factor),
361 struct kobj_type xfs_log_ktype = {
362 .release = xfs_sysfs_release,
363 .sysfs_ops = &xfs_sysfs_ops,
364 .default_attrs = xfs_log_attrs,
368 * Metadata IO error configuration
370 * The sysfs structure here is:
371 * ...xfs/<dev>/error/<class>/<errno>/<error_attrs>
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.
377 static inline struct xfs_error_cfg *
378 to_error_cfg(struct kobject *kobject)
380 struct xfs_kobj *kobj = to_kobj(kobject);
381 return container_of(kobj, struct xfs_error_cfg, kobj);
384 static inline struct xfs_mount *
385 err_to_mp(struct kobject *kobject)
387 struct xfs_kobj *kobj = to_kobj(kobject);
388 return container_of(kobj, struct xfs_mount, m_error_kobj);
393 struct kobject *kobject,
397 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
399 if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
402 retries = cfg->max_retries;
404 return snprintf(buf, PAGE_SIZE, "%d\n", retries);
409 struct kobject *kobject,
413 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
417 ret = kstrtoint(buf, 0, &val);
425 cfg->max_retries = XFS_ERR_RETRY_FOREVER;
427 cfg->max_retries = val;
430 XFS_SYSFS_ATTR_RW(max_retries);
433 retry_timeout_seconds_show(
434 struct kobject *kobject,
438 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
440 if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
443 timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
445 return snprintf(buf, PAGE_SIZE, "%d\n", timeout);
449 retry_timeout_seconds_store(
450 struct kobject *kobject,
454 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
458 ret = kstrtoint(buf, 0, &val);
462 /* 1 day timeout maximum, -1 means infinite */
463 if (val < -1 || val > 86400)
467 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
469 cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
470 ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
474 XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
477 fail_at_unmount_show(
478 struct kobject *kobject,
481 struct xfs_mount *mp = err_to_mp(kobject);
483 return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount);
487 fail_at_unmount_store(
488 struct kobject *kobject,
492 struct xfs_mount *mp = err_to_mp(kobject);
496 ret = kstrtoint(buf, 0, &val);
500 if (val < 0 || val > 1)
503 mp->m_fail_unmount = val;
506 XFS_SYSFS_ATTR_RW(fail_at_unmount);
508 static struct attribute *xfs_error_attrs[] = {
509 ATTR_LIST(max_retries),
510 ATTR_LIST(retry_timeout_seconds),
515 static struct kobj_type xfs_error_cfg_ktype = {
516 .release = xfs_sysfs_release,
517 .sysfs_ops = &xfs_sysfs_ops,
518 .default_attrs = xfs_error_attrs,
521 static struct kobj_type xfs_error_ktype = {
522 .release = xfs_sysfs_release,
523 .sysfs_ops = &xfs_sysfs_ops,
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
532 struct xfs_error_init {
535 int retry_timeout; /* in seconds */
538 static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
540 .max_retries = XFS_ERR_RETRY_FOREVER,
541 .retry_timeout = XFS_ERR_RETRY_FOREVER,
544 .max_retries = XFS_ERR_RETRY_FOREVER,
545 .retry_timeout = XFS_ERR_RETRY_FOREVER,
548 .max_retries = XFS_ERR_RETRY_FOREVER,
549 .retry_timeout = XFS_ERR_RETRY_FOREVER,
552 .max_retries = 0, /* We can't recover from devices disappearing */
558 xfs_error_sysfs_init_class(
559 struct xfs_mount *mp,
561 const char *parent_name,
562 struct xfs_kobj *parent_kobj,
563 const struct xfs_error_init init[])
565 struct xfs_error_cfg *cfg;
569 ASSERT(class < XFS_ERR_CLASS_MAX);
571 error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
572 &mp->m_error_kobj, parent_name);
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);
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;
587 cfg->retry_timeout = msecs_to_jiffies(
588 init[i].retry_timeout * MSEC_PER_SEC);
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);
598 xfs_sysfs_del(parent_kobj);
603 xfs_error_sysfs_init(
604 struct xfs_mount *mp)
608 /* .../xfs/<dev>/error/ */
609 error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
610 &mp->m_kobj, "error");
614 error = sysfs_create_file(&mp->m_error_kobj.kobject,
615 ATTR_LIST(fail_at_unmount));
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);
630 xfs_sysfs_del(&mp->m_error_kobj);
636 struct xfs_mount *mp)
638 struct xfs_error_cfg *cfg;
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];
645 xfs_sysfs_del(&cfg->kobj);
648 xfs_sysfs_del(&mp->m_error_meta_kobj);
649 xfs_sysfs_del(&mp->m_error_kobj);
652 struct xfs_error_cfg *
654 struct xfs_mount *mp,
658 struct xfs_error_cfg *cfg;
665 cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
668 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
671 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
674 cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];