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_mount.h"
17 struct xfs_sysfs_attr {
18 struct attribute attr;
19 ssize_t (*show)(struct kobject *kobject, char *buf);
20 ssize_t (*store)(struct kobject *kobject, const char *buf,
24 static inline struct xfs_sysfs_attr *
25 to_attr(struct attribute *attr)
27 return container_of(attr, struct xfs_sysfs_attr, attr);
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)
34 #define XFS_SYSFS_ATTR_WO(name) \
35 static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)
37 #define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
40 xfs_sysfs_object_show(
41 struct kobject *kobject,
42 struct attribute *attr,
45 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
47 return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
51 xfs_sysfs_object_store(
52 struct kobject *kobject,
53 struct attribute *attr,
57 struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
59 return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
62 static const struct sysfs_ops xfs_sysfs_ops = {
63 .show = xfs_sysfs_object_show,
64 .store = xfs_sysfs_object_store,
67 static struct attribute *xfs_mp_attrs[] = {
70 ATTRIBUTE_GROUPS(xfs_mp);
72 const struct kobj_type xfs_mp_ktype = {
73 .release = xfs_sysfs_release,
74 .sysfs_ops = &xfs_sysfs_ops,
75 .default_groups = xfs_mp_groups,
83 struct kobject *kobject,
90 ret = kstrtoint(buf, 0, &val);
95 xfs_globals.bug_on_assert = true;
97 xfs_globals.bug_on_assert = false;
106 struct kobject *kobject,
109 return sysfs_emit(buf, "%d\n", xfs_globals.bug_on_assert);
111 XFS_SYSFS_ATTR_RW(bug_on_assert);
114 log_recovery_delay_store(
115 struct kobject *kobject,
122 ret = kstrtoint(buf, 0, &val);
126 if (val < 0 || val > 60)
129 xfs_globals.log_recovery_delay = val;
135 log_recovery_delay_show(
136 struct kobject *kobject,
139 return sysfs_emit(buf, "%d\n", xfs_globals.log_recovery_delay);
141 XFS_SYSFS_ATTR_RW(log_recovery_delay);
145 struct kobject *kobject,
152 ret = kstrtoint(buf, 0, &val);
156 if (val < 0 || val > 60)
159 xfs_globals.mount_delay = val;
166 struct kobject *kobject,
169 return sysfs_emit(buf, "%d\n", xfs_globals.mount_delay);
171 XFS_SYSFS_ATTR_RW(mount_delay);
175 struct kobject *kobject,
181 ret = kstrtobool(buf, &xfs_globals.always_cow);
189 struct kobject *kobject,
192 return sysfs_emit(buf, "%d\n", xfs_globals.always_cow);
194 XFS_SYSFS_ATTR_RW(always_cow);
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.
204 struct kobject *kobject,
211 ret = kstrtoint(buf, 0, &val);
215 if (val < -1 || val > num_possible_cpus())
218 xfs_globals.pwork_threads = val;
225 struct kobject *kobject,
228 return sysfs_emit(buf, "%d\n", xfs_globals.pwork_threads);
230 XFS_SYSFS_ATTR_RW(pwork_threads);
233 * The "LARP" (Logged extended Attribute Recovery Persistence) debugging knob
234 * sets the XFS_DA_OP_LOGGED flag on all xfs_attr_set operations performed on
235 * V5 filesystems. As a result, the intermediate progress of all setxattr and
236 * removexattr operations are tracked via the log and can be restarted during
237 * recovery. This is useful for testing xattr recovery prior to merging of the
238 * parent pointer feature which requires it to maintain consistency, and may be
239 * enabled for userspace xattrs in the future.
243 struct kobject *kobject,
249 ret = kstrtobool(buf, &xfs_globals.larp);
257 struct kobject *kobject,
260 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.larp);
262 XFS_SYSFS_ATTR_RW(larp);
266 bload_leaf_slack_store(
267 struct kobject *kobject,
274 ret = kstrtoint(buf, 0, &val);
278 xfs_globals.bload_leaf_slack = val;
283 bload_leaf_slack_show(
284 struct kobject *kobject,
287 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.bload_leaf_slack);
289 XFS_SYSFS_ATTR_RW(bload_leaf_slack);
292 bload_node_slack_store(
293 struct kobject *kobject,
300 ret = kstrtoint(buf, 0, &val);
304 xfs_globals.bload_node_slack = val;
309 bload_node_slack_show(
310 struct kobject *kobject,
313 return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.bload_node_slack);
315 XFS_SYSFS_ATTR_RW(bload_node_slack);
317 static struct attribute *xfs_dbg_attrs[] = {
318 ATTR_LIST(bug_on_assert),
319 ATTR_LIST(log_recovery_delay),
320 ATTR_LIST(mount_delay),
321 ATTR_LIST(always_cow),
323 ATTR_LIST(pwork_threads),
326 ATTR_LIST(bload_leaf_slack),
327 ATTR_LIST(bload_node_slack),
330 ATTRIBUTE_GROUPS(xfs_dbg);
332 const struct kobj_type xfs_dbg_ktype = {
333 .release = xfs_sysfs_release,
334 .sysfs_ops = &xfs_sysfs_ops,
335 .default_groups = xfs_dbg_groups,
342 static inline struct xstats *
343 to_xstats(struct kobject *kobject)
345 struct xfs_kobj *kobj = to_kobj(kobject);
347 return container_of(kobj, struct xstats, xs_kobj);
352 struct kobject *kobject,
355 struct xstats *stats = to_xstats(kobject);
357 return xfs_stats_format(stats->xs_stats, buf);
359 XFS_SYSFS_ATTR_RO(stats);
363 struct kobject *kobject,
369 struct xstats *stats = to_xstats(kobject);
371 ret = kstrtoint(buf, 0, &val);
378 xfs_stats_clearall(stats->xs_stats);
381 XFS_SYSFS_ATTR_WO(stats_clear);
383 static struct attribute *xfs_stats_attrs[] = {
385 ATTR_LIST(stats_clear),
388 ATTRIBUTE_GROUPS(xfs_stats);
390 const struct kobj_type xfs_stats_ktype = {
391 .release = xfs_sysfs_release,
392 .sysfs_ops = &xfs_sysfs_ops,
393 .default_groups = xfs_stats_groups,
398 static inline struct xlog *
399 to_xlog(struct kobject *kobject)
401 struct xfs_kobj *kobj = to_kobj(kobject);
403 return container_of(kobj, struct xlog, l_kobj);
408 struct kobject *kobject,
413 struct xlog *log = to_xlog(kobject);
415 spin_lock(&log->l_icloglock);
416 cycle = log->l_curr_cycle;
417 block = log->l_curr_block;
418 spin_unlock(&log->l_icloglock);
420 return sysfs_emit(buf, "%d:%d\n", cycle, block);
422 XFS_SYSFS_ATTR_RO(log_head_lsn);
426 struct kobject *kobject,
431 struct xlog *log = to_xlog(kobject);
433 xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
434 return sysfs_emit(buf, "%d:%d\n", cycle, block);
436 XFS_SYSFS_ATTR_RO(log_tail_lsn);
439 reserve_grant_head_show(
440 struct kobject *kobject,
446 struct xlog *log = to_xlog(kobject);
448 xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
449 return sysfs_emit(buf, "%d:%d\n", cycle, bytes);
451 XFS_SYSFS_ATTR_RO(reserve_grant_head);
454 write_grant_head_show(
455 struct kobject *kobject,
460 struct xlog *log = to_xlog(kobject);
462 xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
463 return sysfs_emit(buf, "%d:%d\n", cycle, bytes);
465 XFS_SYSFS_ATTR_RO(write_grant_head);
467 static struct attribute *xfs_log_attrs[] = {
468 ATTR_LIST(log_head_lsn),
469 ATTR_LIST(log_tail_lsn),
470 ATTR_LIST(reserve_grant_head),
471 ATTR_LIST(write_grant_head),
474 ATTRIBUTE_GROUPS(xfs_log);
476 const struct kobj_type xfs_log_ktype = {
477 .release = xfs_sysfs_release,
478 .sysfs_ops = &xfs_sysfs_ops,
479 .default_groups = xfs_log_groups,
483 * Metadata IO error configuration
485 * The sysfs structure here is:
486 * ...xfs/<dev>/error/<class>/<errno>/<error_attrs>
488 * where <class> allows us to discriminate between data IO and metadata IO,
489 * and any other future type of IO (e.g. special inode or directory error
490 * handling) we care to support.
492 static inline struct xfs_error_cfg *
493 to_error_cfg(struct kobject *kobject)
495 struct xfs_kobj *kobj = to_kobj(kobject);
496 return container_of(kobj, struct xfs_error_cfg, kobj);
499 static inline struct xfs_mount *
500 err_to_mp(struct kobject *kobject)
502 struct xfs_kobj *kobj = to_kobj(kobject);
503 return container_of(kobj, struct xfs_mount, m_error_kobj);
508 struct kobject *kobject,
512 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
514 if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
517 retries = cfg->max_retries;
519 return sysfs_emit(buf, "%d\n", retries);
524 struct kobject *kobject,
528 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
532 ret = kstrtoint(buf, 0, &val);
540 cfg->max_retries = XFS_ERR_RETRY_FOREVER;
542 cfg->max_retries = val;
545 XFS_SYSFS_ATTR_RW(max_retries);
548 retry_timeout_seconds_show(
549 struct kobject *kobject,
553 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
555 if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
558 timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
560 return sysfs_emit(buf, "%d\n", timeout);
564 retry_timeout_seconds_store(
565 struct kobject *kobject,
569 struct xfs_error_cfg *cfg = to_error_cfg(kobject);
573 ret = kstrtoint(buf, 0, &val);
577 /* 1 day timeout maximum, -1 means infinite */
578 if (val < -1 || val > 86400)
582 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
584 cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
585 ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
589 XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
592 fail_at_unmount_show(
593 struct kobject *kobject,
596 struct xfs_mount *mp = err_to_mp(kobject);
598 return sysfs_emit(buf, "%d\n", mp->m_fail_unmount);
602 fail_at_unmount_store(
603 struct kobject *kobject,
607 struct xfs_mount *mp = err_to_mp(kobject);
611 ret = kstrtoint(buf, 0, &val);
615 if (val < 0 || val > 1)
618 mp->m_fail_unmount = val;
621 XFS_SYSFS_ATTR_RW(fail_at_unmount);
623 static struct attribute *xfs_error_attrs[] = {
624 ATTR_LIST(max_retries),
625 ATTR_LIST(retry_timeout_seconds),
628 ATTRIBUTE_GROUPS(xfs_error);
630 static const struct kobj_type xfs_error_cfg_ktype = {
631 .release = xfs_sysfs_release,
632 .sysfs_ops = &xfs_sysfs_ops,
633 .default_groups = xfs_error_groups,
636 static const struct kobj_type xfs_error_ktype = {
637 .release = xfs_sysfs_release,
638 .sysfs_ops = &xfs_sysfs_ops,
642 * Error initialization tables. These need to be ordered in the same
643 * order as the enums used to index the array. All class init tables need to
644 * define a "default" behaviour as the first entry, all other entries can be
647 struct xfs_error_init {
650 int retry_timeout; /* in seconds */
653 static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
655 .max_retries = XFS_ERR_RETRY_FOREVER,
656 .retry_timeout = XFS_ERR_RETRY_FOREVER,
659 .max_retries = XFS_ERR_RETRY_FOREVER,
660 .retry_timeout = XFS_ERR_RETRY_FOREVER,
663 .max_retries = XFS_ERR_RETRY_FOREVER,
664 .retry_timeout = XFS_ERR_RETRY_FOREVER,
667 .max_retries = 0, /* We can't recover from devices disappearing */
673 xfs_error_sysfs_init_class(
674 struct xfs_mount *mp,
676 const char *parent_name,
677 struct xfs_kobj *parent_kobj,
678 const struct xfs_error_init init[])
680 struct xfs_error_cfg *cfg;
684 ASSERT(class < XFS_ERR_CLASS_MAX);
686 error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
687 &mp->m_error_kobj, parent_name);
691 for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
692 cfg = &mp->m_error_cfg[class][i];
693 error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
694 parent_kobj, init[i].name);
698 cfg->max_retries = init[i].max_retries;
699 if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
700 cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
702 cfg->retry_timeout = msecs_to_jiffies(
703 init[i].retry_timeout * MSEC_PER_SEC);
708 /* unwind the entries that succeeded */
709 for (i--; i >= 0; i--) {
710 cfg = &mp->m_error_cfg[class][i];
711 xfs_sysfs_del(&cfg->kobj);
713 xfs_sysfs_del(parent_kobj);
718 xfs_error_sysfs_init(
719 struct xfs_mount *mp)
723 /* .../xfs/<dev>/error/ */
724 error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
725 &mp->m_kobj, "error");
729 error = sysfs_create_file(&mp->m_error_kobj.kobject,
730 ATTR_LIST(fail_at_unmount));
735 /* .../xfs/<dev>/error/metadata/ */
736 error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
737 "metadata", &mp->m_error_meta_kobj,
738 xfs_error_meta_init);
745 xfs_sysfs_del(&mp->m_error_kobj);
751 struct xfs_mount *mp)
753 struct xfs_error_cfg *cfg;
756 for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
757 for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
758 cfg = &mp->m_error_cfg[i][j];
760 xfs_sysfs_del(&cfg->kobj);
763 xfs_sysfs_del(&mp->m_error_meta_kobj);
764 xfs_sysfs_del(&mp->m_error_kobj);
767 struct xfs_error_cfg *
769 struct xfs_mount *mp,
773 struct xfs_error_cfg *cfg;
780 cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
783 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
786 cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
789 cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];