1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2014 Red Hat, Inc.
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"
14 #include "xfs_log_priv.h"
15 #include "xfs_stats.h"
16 #include "xfs_mount.h"
18 struct xfs_sysfs_attr {
19 struct attribute attr;
20 ssize_t (*show)(struct kobject *kobject, char *buf);
21 ssize_t (*store)(struct kobject *kobject, const char *buf,
25 static inline struct xfs_sysfs_attr *
26 to_attr(struct attribute *attr)
28 return container_of(attr, struct xfs_sysfs_attr, attr);
31 #define XFS_SYSFS_ATTR_RW(name) \
32 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
33 #define XFS_SYSFS_ATTR_RO(name) \
34 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
35 #define XFS_SYSFS_ATTR_WO(name) \
36 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)
38 #define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
41 xfs_sysfs_object_show(
42 struct kobject *kobject,
43 struct attribute *attr,
46 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
48 return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
52 xfs_sysfs_object_store(
53 struct kobject *kobject,
54 struct attribute *attr,
58 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
60 return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
63 static const struct sysfs_ops xfs_sysfs_ops = {
64 .show = xfs_sysfs_object_show,
65 .store = xfs_sysfs_object_store,
69 * xfs_mount kobject. The mp kobject also serves as the per-mount parent object
70 * that is identified by the fsname under sysfs.
73 static inline struct xfs_mount *
74 to_mp(struct kobject *kobject)
76 struct xfs_kobj *kobj = to_kobj(kobject);
78 return container_of(kobj, struct xfs_mount, m_kobj);
81 static struct attribute *xfs_mp_attrs[] = {
85 struct kobj_type xfs_mp_ktype = {
86 .release = xfs_sysfs_release,
87 .sysfs_ops = &xfs_sysfs_ops,
88 .default_attrs = xfs_mp_attrs,
96 struct kobject *kobject,
103 ret = kstrtoint(buf, 0, &val);
108 xfs_globals.bug_on_assert = true;
110 xfs_globals.bug_on_assert = false;
119 struct kobject *kobject,
122 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.bug_on_assert ? 1 : 0);
124 XFS_SYSFS_ATTR_RW(bug_on_assert);
127 log_recovery_delay_store(
128 struct kobject *kobject,
135 ret = kstrtoint(buf, 0, &val);
139 if (val < 0 || val > 60)
142 xfs_globals.log_recovery_delay = val;
148 log_recovery_delay_show(
149 struct kobject *kobject,
152 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
154 XFS_SYSFS_ATTR_RW(log_recovery_delay);
158 struct kobject *kobject,
165 ret = kstrtoint(buf, 0, &val);
169 if (val < 0 || val > 60)
172 xfs_globals.mount_delay = val;
179 struct kobject *kobject,
182 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.mount_delay);
184 XFS_SYSFS_ATTR_RW(mount_delay);
188 struct kobject *kobject,
194 ret = kstrtobool(buf, &xfs_globals.always_cow);
202 struct kobject *kobject,
205 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.always_cow);
207 XFS_SYSFS_ATTR_RW(always_cow);
209 static struct attribute *xfs_dbg_attrs[] = {
210 ATTR_LIST(bug_on_assert),
211 ATTR_LIST(log_recovery_delay),
212 ATTR_LIST(mount_delay),
213 ATTR_LIST(always_cow),
217 struct kobj_type xfs_dbg_ktype = {
218 .release = xfs_sysfs_release,
219 .sysfs_ops = &xfs_sysfs_ops,
220 .default_attrs = xfs_dbg_attrs,
227 static inline struct xstats *
228 to_xstats(struct kobject *kobject)
230 struct xfs_kobj *kobj = to_kobj(kobject);
232 return container_of(kobj, struct xstats, xs_kobj);
237 struct kobject *kobject,
240 struct xstats *stats = to_xstats(kobject);
242 return xfs_stats_format(stats->xs_stats, buf);
244 XFS_SYSFS_ATTR_RO(stats);
248 struct kobject *kobject,
254 struct xstats *stats = to_xstats(kobject);
256 ret = kstrtoint(buf, 0, &val);
263 xfs_stats_clearall(stats->xs_stats);
266 XFS_SYSFS_ATTR_WO(stats_clear);
268 static struct attribute *xfs_stats_attrs[] = {
270 ATTR_LIST(stats_clear),
274 struct kobj_type xfs_stats_ktype = {
275 .release = xfs_sysfs_release,
276 .sysfs_ops = &xfs_sysfs_ops,
277 .default_attrs = xfs_stats_attrs,
282 static inline struct xlog *
283 to_xlog(struct kobject *kobject)
285 struct xfs_kobj *kobj = to_kobj(kobject);
287 return container_of(kobj, struct xlog, l_kobj);
292 struct kobject *kobject,
297 struct xlog *log = to_xlog(kobject);
299 spin_lock(&log->l_icloglock);
300 cycle = log->l_curr_cycle;
301 block = log->l_curr_block;
302 spin_unlock(&log->l_icloglock);
304 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
306 XFS_SYSFS_ATTR_RO(log_head_lsn);
310 struct kobject *kobject,
315 struct xlog *log = to_xlog(kobject);
317 xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
318 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
320 XFS_SYSFS_ATTR_RO(log_tail_lsn);
323 reserve_grant_head_show(
324 struct kobject *kobject,
330 struct xlog *log = to_xlog(kobject);
332 xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
333 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
335 XFS_SYSFS_ATTR_RO(reserve_grant_head);
338 write_grant_head_show(
339 struct kobject *kobject,
344 struct xlog *log = to_xlog(kobject);
346 xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
347 return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
349 XFS_SYSFS_ATTR_RO(write_grant_head);
351 static struct attribute *xfs_log_attrs[] = {
352 ATTR_LIST(log_head_lsn),
353 ATTR_LIST(log_tail_lsn),
354 ATTR_LIST(reserve_grant_head),
355 ATTR_LIST(write_grant_head),
359 struct kobj_type xfs_log_ktype = {
360 .release = xfs_sysfs_release,
361 .sysfs_ops = &xfs_sysfs_ops,
362 .default_attrs = xfs_log_attrs,
366 * Metadata IO error configuration
368 * The sysfs structure here is:
369 * ...xfs/<dev>/error/<class>/<errno>/<error_attrs>
371 * where <class> allows us to discriminate between data IO and metadata IO,
372 * and any other future type of IO (e.g. special inode or directory error
373 * handling) we care to support.
375 static inline struct xfs_error_cfg *
376 to_error_cfg(struct kobject *kobject)
378 struct xfs_kobj *kobj = to_kobj(kobject);
379 return container_of(kobj, struct xfs_error_cfg, kobj);
382 static inline struct xfs_mount *
383 err_to_mp(struct kobject *kobject)
385 struct xfs_kobj *kobj = to_kobj(kobject);
386 return container_of(kobj, struct xfs_mount, m_error_kobj);
391 struct kobject *kobject,
395 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
397 if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
400 retries = cfg->max_retries;
402 return snprintf(buf, PAGE_SIZE, "%d\n", retries);
407 struct kobject *kobject,
411 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
415 ret = kstrtoint(buf, 0, &val);
423 cfg->max_retries = XFS_ERR_RETRY_FOREVER;
425 cfg->max_retries = val;
428 XFS_SYSFS_ATTR_RW(max_retries);
431 retry_timeout_seconds_show(
432 struct kobject *kobject,
436 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
438 if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
441 timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
443 return snprintf(buf, PAGE_SIZE, "%d\n", timeout);
447 retry_timeout_seconds_store(
448 struct kobject *kobject,
452 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
456 ret = kstrtoint(buf, 0, &val);
460 /* 1 day timeout maximum, -1 means infinite */
461 if (val < -1 || val > 86400)
465 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
467 cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
468 ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
472 XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
475 fail_at_unmount_show(
476 struct kobject *kobject,
479 struct xfs_mount *mp = err_to_mp(kobject);
481 return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount);
485 fail_at_unmount_store(
486 struct kobject *kobject,
490 struct xfs_mount *mp = err_to_mp(kobject);
494 ret = kstrtoint(buf, 0, &val);
498 if (val < 0 || val > 1)
501 mp->m_fail_unmount = val;
504 XFS_SYSFS_ATTR_RW(fail_at_unmount);
506 static struct attribute *xfs_error_attrs[] = {
507 ATTR_LIST(max_retries),
508 ATTR_LIST(retry_timeout_seconds),
513 static struct kobj_type xfs_error_cfg_ktype = {
514 .release = xfs_sysfs_release,
515 .sysfs_ops = &xfs_sysfs_ops,
516 .default_attrs = xfs_error_attrs,
519 static struct kobj_type xfs_error_ktype = {
520 .release = xfs_sysfs_release,
521 .sysfs_ops = &xfs_sysfs_ops,
525 * Error initialization tables. These need to be ordered in the same
526 * order as the enums used to index the array. All class init tables need to
527 * define a "default" behaviour as the first entry, all other entries can be
530 struct xfs_error_init {
533 int retry_timeout; /* in seconds */
536 static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
538 .max_retries = XFS_ERR_RETRY_FOREVER,
539 .retry_timeout = XFS_ERR_RETRY_FOREVER,
542 .max_retries = XFS_ERR_RETRY_FOREVER,
543 .retry_timeout = XFS_ERR_RETRY_FOREVER,
546 .max_retries = XFS_ERR_RETRY_FOREVER,
547 .retry_timeout = XFS_ERR_RETRY_FOREVER,
550 .max_retries = 0, /* We can't recover from devices disappearing */
556 xfs_error_sysfs_init_class(
557 struct xfs_mount *mp,
559 const char *parent_name,
560 struct xfs_kobj *parent_kobj,
561 const struct xfs_error_init init[])
563 struct xfs_error_cfg *cfg;
567 ASSERT(class < XFS_ERR_CLASS_MAX);
569 error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
570 &mp->m_error_kobj, parent_name);
574 for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
575 cfg = &mp->m_error_cfg[class][i];
576 error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
577 parent_kobj, init[i].name);
581 cfg->max_retries = init[i].max_retries;
582 if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
583 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
585 cfg->retry_timeout = msecs_to_jiffies(
586 init[i].retry_timeout * MSEC_PER_SEC);
591 /* unwind the entries that succeeded */
592 for (i--; i >= 0; i--) {
593 cfg = &mp->m_error_cfg[class][i];
594 xfs_sysfs_del(&cfg->kobj);
596 xfs_sysfs_del(parent_kobj);
601 xfs_error_sysfs_init(
602 struct xfs_mount *mp)
606 /* .../xfs/<dev>/error/ */
607 error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
608 &mp->m_kobj, "error");
612 error = sysfs_create_file(&mp->m_error_kobj.kobject,
613 ATTR_LIST(fail_at_unmount));
618 /* .../xfs/<dev>/error/metadata/ */
619 error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
620 "metadata", &mp->m_error_meta_kobj,
621 xfs_error_meta_init);
628 xfs_sysfs_del(&mp->m_error_kobj);
634 struct xfs_mount *mp)
636 struct xfs_error_cfg *cfg;
639 for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
640 for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
641 cfg = &mp->m_error_cfg[i][j];
643 xfs_sysfs_del(&cfg->kobj);
646 xfs_sysfs_del(&mp->m_error_meta_kobj);
647 xfs_sysfs_del(&mp->m_error_kobj);
650 struct xfs_error_cfg *
652 struct xfs_mount *mp,
656 struct xfs_error_cfg *cfg;
663 cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
666 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
669 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
672 cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];