1 // SPDX-License-Identifier: GPL-2.0
3 * bcache sysfs interfaces
5 * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com>
6 * Copyright 2012 Google, Inc.
9 #ifndef NO_BCACHEFS_SYSFS
12 #include "alloc_background.h"
13 #include "alloc_foreground.h"
15 #include "btree_cache.h"
17 #include "btree_iter.h"
18 #include "btree_key_cache.h"
19 #include "btree_update.h"
20 #include "btree_update_interior.h"
24 #include "disk_groups.h"
31 #include "rebalance.h"
36 #include <linux/blkdev.h>
37 #include <linux/pretty-printers.h>
38 #include <linux/sort.h>
39 #include <linux/sched/clock.h>
43 #define SYSFS_OPS(type) \
44 const struct sysfs_ops type ## _sysfs_ops = { \
45 .show = type ## _show, \
46 .store = type ## _store \
50 static ssize_t fn ## _to_text(struct printbuf *, \
51 struct kobject *, struct attribute *); \
53 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
56 struct printbuf out = PRINTBUF; \
57 ssize_t ret = fn ## _to_text(&out, kobj, attr); \
59 if (out.pos && out.buf[out.pos - 1] != '\n') \
62 if (!ret && out.allocation_failure) \
66 ret = min_t(size_t, out.pos, PAGE_SIZE - 1); \
67 memcpy(buf, out.buf, ret); \
69 printbuf_exit(&out); \
70 return bch2_err_class(ret); \
73 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
74 struct attribute *attr)
77 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
78 const char *, size_t); \
80 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
81 const char *buf, size_t size) \
83 return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
86 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
87 const char *buf, size_t size)
89 #define __sysfs_attribute(_name, _mode) \
90 static struct attribute sysfs_##_name = \
91 { .name = #_name, .mode = _mode }
93 #define write_attribute(n) __sysfs_attribute(n, 0200)
94 #define read_attribute(n) __sysfs_attribute(n, 0444)
95 #define rw_attribute(n) __sysfs_attribute(n, 0644)
97 #define sysfs_printf(file, fmt, ...) \
99 if (attr == &sysfs_ ## file) \
100 prt_printf(out, fmt "\n", __VA_ARGS__); \
103 #define sysfs_print(file, var) \
105 if (attr == &sysfs_ ## file) \
109 #define sysfs_hprint(file, val) \
111 if (attr == &sysfs_ ## file) \
112 prt_human_readable_s64(out, val); \
115 #define var_printf(_var, fmt) sysfs_printf(_var, fmt, var(_var))
116 #define var_print(_var) sysfs_print(_var, var(_var))
117 #define var_hprint(_var) sysfs_hprint(_var, var(_var))
119 #define sysfs_strtoul(file, var) \
121 if (attr == &sysfs_ ## file) \
122 return strtoul_safe(buf, var) ?: (ssize_t) size; \
125 #define sysfs_strtoul_clamp(file, var, min, max) \
127 if (attr == &sysfs_ ## file) \
128 return strtoul_safe_clamp(buf, var, min, max) \
132 #define strtoul_or_return(cp) \
135 int _r = kstrtoul(cp, 10, &_v); \
141 #define strtoul_restrict_or_return(cp, min, max) \
143 unsigned long __v = 0; \
144 int _r = strtoul_safe_restrict(cp, __v, min, max); \
150 #define strtoi_h_or_return(cp) \
153 int _r = strtoi_h(cp, &_v); \
159 #define sysfs_hatoi(file, var) \
161 if (attr == &sysfs_ ## file) \
162 return strtoi_h(buf, &var) ?: (ssize_t) size; \
165 write_attribute(trigger_gc);
166 write_attribute(trigger_discards);
167 write_attribute(trigger_invalidates);
168 write_attribute(prune_cache);
169 write_attribute(btree_wakeup);
170 rw_attribute(btree_gc_periodic);
171 rw_attribute(gc_gens_pos);
173 read_attribute(uuid);
174 read_attribute(minor);
175 read_attribute(bucket_size);
176 read_attribute(first_bucket);
177 read_attribute(nbuckets);
178 rw_attribute(durability);
179 read_attribute(iodone);
181 read_attribute(io_latency_read);
182 read_attribute(io_latency_write);
183 read_attribute(io_latency_stats_read);
184 read_attribute(io_latency_stats_write);
185 read_attribute(congested);
187 read_attribute(btree_write_stats);
189 read_attribute(btree_cache_size);
190 read_attribute(compression_stats);
191 read_attribute(journal_debug);
192 read_attribute(btree_updates);
193 read_attribute(btree_cache);
194 read_attribute(btree_key_cache);
195 read_attribute(stripes_heap);
196 read_attribute(open_buckets);
198 read_attribute(internal_uuid);
200 read_attribute(has_data);
201 read_attribute(alloc_debug);
203 #define x(t, n, ...) read_attribute(t);
204 BCH_PERSISTENT_COUNTERS()
207 rw_attribute(discard);
210 rw_attribute(copy_gc_enabled);
211 read_attribute(copy_gc_wait);
213 rw_attribute(rebalance_enabled);
214 sysfs_pd_controller_attribute(rebalance);
215 read_attribute(rebalance_work);
216 rw_attribute(promote_whole_extents);
218 read_attribute(new_stripes);
220 read_attribute(io_timers_read);
221 read_attribute(io_timers_write);
223 read_attribute(data_jobs);
225 #ifdef CONFIG_BCACHEFS_TESTS
226 write_attribute(perf_test);
227 #endif /* CONFIG_BCACHEFS_TESTS */
230 static struct attribute sysfs_time_stat_##_name = \
231 { .name = #_name, .mode = 0444 };
235 static struct attribute sysfs_state_rw = {
240 static size_t bch2_btree_cache_size(struct bch_fs *c)
245 mutex_lock(&c->btree_cache.lock);
246 list_for_each_entry(b, &c->btree_cache.live, list)
247 ret += btree_bytes(c);
249 mutex_unlock(&c->btree_cache.lock);
253 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
256 struct bch_move_stats *stats;
258 mutex_lock(&c->data_progress_lock);
259 list_for_each_entry(stats, &c->data_progress_list, list) {
260 prt_printf(out, "%s: data type %s btree_id %s position: ",
262 bch2_data_types[stats->data_type],
263 bch2_btree_ids[stats->btree_id]);
264 bch2_bpos_to_text(out, stats->pos);
265 prt_printf(out, "%s", "\n");
268 mutex_unlock(&c->data_progress_lock);
272 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
274 struct btree_trans trans;
275 struct btree_iter iter;
278 u64 nr_uncompressed_extents = 0,
279 nr_compressed_extents = 0,
280 nr_incompressible_extents = 0,
281 uncompressed_sectors = 0,
282 incompressible_sectors = 0,
283 compressed_sectors_compressed = 0,
284 compressed_sectors_uncompressed = 0;
287 if (!test_bit(BCH_FS_STARTED, &c->flags))
290 bch2_trans_init(&trans, c, 0, 0);
292 for (id = 0; id < BTREE_ID_NR; id++) {
293 if (!btree_type_has_ptrs(id))
296 for_each_btree_key(&trans, iter, id, POS_MIN,
297 BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
298 struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
299 const union bch_extent_entry *entry;
300 struct extent_ptr_decoded p;
301 bool compressed = false, uncompressed = false, incompressible = false;
303 bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
304 switch (p.crc.compression_type) {
305 case BCH_COMPRESSION_TYPE_none:
307 uncompressed_sectors += k.k->size;
309 case BCH_COMPRESSION_TYPE_incompressible:
310 incompressible = true;
311 incompressible_sectors += k.k->size;
314 compressed_sectors_compressed +=
315 p.crc.compressed_size;
316 compressed_sectors_uncompressed +=
317 p.crc.uncompressed_size;
324 nr_incompressible_extents++;
325 else if (uncompressed)
326 nr_uncompressed_extents++;
328 nr_compressed_extents++;
330 bch2_trans_iter_exit(&trans, &iter);
333 bch2_trans_exit(&trans);
338 prt_printf(out, "uncompressed:\n");
339 prt_printf(out, " nr extents: %llu\n", nr_uncompressed_extents);
340 prt_printf(out, " size: ");
341 prt_human_readable_u64(out, uncompressed_sectors << 9);
342 prt_printf(out, "\n");
344 prt_printf(out, "compressed:\n");
345 prt_printf(out, " nr extents: %llu\n", nr_compressed_extents);
346 prt_printf(out, " compressed size: ");
347 prt_human_readable_u64(out, compressed_sectors_compressed << 9);
348 prt_printf(out, "\n");
349 prt_printf(out, " uncompressed size: ");
350 prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
351 prt_printf(out, "\n");
353 prt_printf(out, "incompressible:\n");
354 prt_printf(out, " nr extents: %llu\n", nr_incompressible_extents);
355 prt_printf(out, " size: ");
356 prt_human_readable_u64(out, incompressible_sectors << 9);
357 prt_printf(out, "\n");
361 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
363 prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
364 bch2_bpos_to_text(out, c->gc_gens_pos);
365 prt_printf(out, "\n");
368 static void bch2_btree_wakeup_all(struct bch_fs *c)
370 struct btree_trans *trans;
372 mutex_lock(&c->btree_trans_lock);
373 list_for_each_entry(trans, &c->btree_trans_list, list) {
374 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
377 six_lock_wakeup_all(&b->lock);
380 mutex_unlock(&c->btree_trans_lock);
385 struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
387 sysfs_print(minor, c->minor);
388 sysfs_printf(internal_uuid, "%pU", c->sb.uuid.b);
390 sysfs_hprint(btree_cache_size, bch2_btree_cache_size(c));
392 if (attr == &sysfs_btree_write_stats)
393 bch2_btree_write_stats_to_text(out, c);
395 sysfs_printf(btree_gc_periodic, "%u", (int) c->btree_gc_periodic);
397 if (attr == &sysfs_gc_gens_pos)
398 bch2_gc_gens_pos_to_text(out, c);
400 sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
402 sysfs_printf(rebalance_enabled, "%i", c->rebalance.enabled);
403 sysfs_pd_controller_show(rebalance, &c->rebalance.pd); /* XXX */
404 sysfs_hprint(copy_gc_wait,
405 max(0LL, c->copygc_wait -
406 atomic64_read(&c->io_clock[WRITE].now)) << 9);
408 if (attr == &sysfs_rebalance_work)
409 bch2_rebalance_work_to_text(out, c);
411 sysfs_print(promote_whole_extents, c->promote_whole_extents);
415 if (attr == &sysfs_journal_debug)
416 bch2_journal_debug_to_text(out, &c->journal);
418 if (attr == &sysfs_btree_updates)
419 bch2_btree_updates_to_text(out, c);
421 if (attr == &sysfs_btree_cache)
422 bch2_btree_cache_to_text(out, &c->btree_cache);
424 if (attr == &sysfs_btree_key_cache)
425 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
427 if (attr == &sysfs_stripes_heap)
428 bch2_stripes_heap_to_text(out, c);
430 if (attr == &sysfs_open_buckets)
431 bch2_open_buckets_to_text(out, c);
433 if (attr == &sysfs_compression_stats)
434 bch2_compression_stats_to_text(out, c);
436 if (attr == &sysfs_new_stripes)
437 bch2_new_stripes_to_text(out, c);
439 if (attr == &sysfs_io_timers_read)
440 bch2_io_timers_to_text(out, &c->io_clock[READ]);
442 if (attr == &sysfs_io_timers_write)
443 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
445 if (attr == &sysfs_data_jobs)
446 data_progress_to_text(out, c);
453 struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
455 if (attr == &sysfs_btree_gc_periodic) {
456 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
459 wake_up_process(c->gc_thread);
463 if (attr == &sysfs_copy_gc_enabled) {
464 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
467 if (c->copygc_thread)
468 wake_up_process(c->copygc_thread);
472 if (attr == &sysfs_rebalance_enabled) {
473 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
480 sysfs_pd_controller_store(rebalance, &c->rebalance.pd);
482 sysfs_strtoul(promote_whole_extents, c->promote_whole_extents);
486 if (!test_bit(BCH_FS_STARTED, &c->flags))
491 if (!test_bit(BCH_FS_RW, &c->flags))
494 if (attr == &sysfs_prune_cache) {
495 struct shrink_control sc;
497 sc.gfp_mask = GFP_KERNEL;
498 sc.nr_to_scan = strtoul_or_return(buf);
499 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
502 if (attr == &sysfs_btree_wakeup)
503 bch2_btree_wakeup_all(c);
505 if (attr == &sysfs_trigger_gc) {
507 * Full gc is currently incompatible with btree key cache:
510 down_read(&c->state_lock);
511 bch2_gc(c, false, false);
512 up_read(&c->state_lock);
518 if (attr == &sysfs_trigger_discards)
521 if (attr == &sysfs_trigger_invalidates)
522 bch2_do_invalidates(c);
524 #ifdef CONFIG_BCACHEFS_TESTS
525 if (attr == &sysfs_perf_test) {
526 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
527 char *test = strsep(&p, " \t\n");
528 char *nr_str = strsep(&p, " \t\n");
529 char *threads_str = strsep(&p, " \t\n");
535 !(ret = kstrtouint(threads_str, 10, &threads)) &&
536 !(ret = bch2_strtoull_h(nr_str, &nr)))
537 ret = bch2_btree_perf_test(c, test, nr, threads);
548 struct attribute *bch2_fs_files[] = {
550 &sysfs_btree_cache_size,
551 &sysfs_btree_write_stats,
553 &sysfs_promote_whole_extents,
555 &sysfs_compression_stats,
557 #ifdef CONFIG_BCACHEFS_TESTS
565 SHOW(bch2_fs_counters)
567 struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
569 u64 counter_since_mount = 0;
571 printbuf_tabstop_push(out, 32);
574 if (attr == &sysfs_##t) { \
575 counter = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
576 counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
577 prt_printf(out, "since mount:"); \
579 prt_human_readable_u64(out, counter_since_mount << 9); \
582 prt_printf(out, "since filesystem creation:"); \
584 prt_human_readable_u64(out, counter << 9); \
587 BCH_PERSISTENT_COUNTERS()
592 STORE(bch2_fs_counters) {
596 SYSFS_OPS(bch2_fs_counters);
598 struct attribute *bch2_fs_counters_files[] = {
601 BCH_PERSISTENT_COUNTERS()
605 /* internal dir - just a wrapper */
607 SHOW(bch2_fs_internal)
609 struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
611 return bch2_fs_to_text(out, &c->kobj, attr);
614 STORE(bch2_fs_internal)
616 struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
618 return bch2_fs_store(&c->kobj, attr, buf, size);
620 SYSFS_OPS(bch2_fs_internal);
622 struct attribute *bch2_fs_internal_files[] = {
623 &sysfs_journal_debug,
624 &sysfs_btree_updates,
626 &sysfs_btree_key_cache,
630 &sysfs_io_timers_read,
631 &sysfs_io_timers_write,
634 &sysfs_trigger_discards,
635 &sysfs_trigger_invalidates,
641 &sysfs_copy_gc_enabled,
644 &sysfs_rebalance_enabled,
645 &sysfs_rebalance_work,
646 sysfs_pd_controller_files(rebalance),
650 &sysfs_internal_uuid,
656 SHOW(bch2_fs_opts_dir)
658 struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
659 const struct bch_option *opt = container_of(attr, struct bch_option, attr);
660 int id = opt - bch2_opt_table;
661 u64 v = bch2_opt_get_by_id(&c->opts, id);
663 bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
669 STORE(bch2_fs_opts_dir)
671 struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
672 const struct bch_option *opt = container_of(attr, struct bch_option, attr);
673 int ret, id = opt - bch2_opt_table;
678 * We don't need to take c->writes for correctness, but it eliminates an
679 * unsightly error message in the dmesg log when we're RO:
681 if (unlikely(!percpu_ref_tryget_live(&c->writes)))
684 tmp = kstrdup(buf, GFP_KERNEL);
690 ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
696 ret = bch2_opt_check_may_set(c, id, v);
700 bch2_opt_set_sb(c, opt, v);
701 bch2_opt_set_by_id(&c->opts, id, v);
703 if ((id == Opt_background_target ||
704 id == Opt_background_compression) && v) {
705 bch2_rebalance_add_work(c, S64_MAX);
711 percpu_ref_put(&c->writes);
714 SYSFS_OPS(bch2_fs_opts_dir);
716 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
718 int bch2_opts_create_sysfs_files(struct kobject *kobj)
720 const struct bch_option *i;
723 for (i = bch2_opt_table;
724 i < bch2_opt_table + bch2_opts_nr;
726 if (!(i->flags & OPT_FS))
729 ret = sysfs_create_file(kobj, &i->attr);
739 SHOW(bch2_fs_time_stats)
741 struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
744 if (attr == &sysfs_time_stat_##name) \
745 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
752 STORE(bch2_fs_time_stats)
756 SYSFS_OPS(bch2_fs_time_stats);
758 struct attribute *bch2_fs_time_stats_files[] = {
760 &sysfs_time_stat_##name,
766 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
768 struct bch_fs *c = ca->fs;
769 struct bch_dev_usage stats = bch2_dev_usage_read(ca);
770 unsigned i, nr[BCH_DATA_NR];
772 memset(nr, 0, sizeof(nr));
774 for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
775 nr[c->open_buckets[i].data_type]++;
778 "\t\t\t buckets\t sectors fragmented\n"
779 "capacity\t%16llu\n",
780 ca->mi.nbuckets - ca->mi.first_bucket);
782 for (i = 0; i < BCH_DATA_NR; i++)
783 prt_printf(out, "%-16s%16llu%16llu%16llu\n",
784 bch2_data_types[i], stats.d[i].buckets,
785 stats.d[i].sectors, stats.d[i].fragmented);
790 "freelist_wait\t\t%s\n"
791 "open buckets allocated\t%u\n"
792 "open buckets this dev\t%u\n"
793 "open buckets total\t%u\n"
794 "open_buckets_wait\t%s\n"
795 "open_buckets_btree\t%u\n"
796 "open_buckets_user\t%u\n"
797 "buckets_to_invalidate\t%llu\n"
798 "btree reserve cache\t%u\n",
800 c->freelist_wait.list.first ? "waiting" : "empty",
801 OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
804 c->open_buckets_wait.list.first ? "waiting" : "empty",
807 should_invalidate_buckets(ca, stats),
808 c->btree_reserve_cache_nr);
811 static const char * const bch2_rw[] = {
817 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
821 for (rw = 0; rw < 2; rw++) {
822 prt_printf(out, "%s:\n", bch2_rw[rw]);
824 for (i = 1; i < BCH_DATA_NR; i++)
825 prt_printf(out, "%-12s:%12llu\n",
827 percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
833 struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
834 struct bch_fs *c = ca->fs;
836 sysfs_printf(uuid, "%pU\n", ca->uuid.b);
838 sysfs_print(bucket_size, bucket_bytes(ca));
839 sysfs_print(first_bucket, ca->mi.first_bucket);
840 sysfs_print(nbuckets, ca->mi.nbuckets);
841 sysfs_print(durability, ca->mi.durability);
842 sysfs_print(discard, ca->mi.discard);
844 if (attr == &sysfs_label) {
846 mutex_lock(&c->sb_lock);
847 bch2_disk_path_to_text(out, c->disk_sb.sb,
849 mutex_unlock(&c->sb_lock);
855 if (attr == &sysfs_has_data) {
856 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
860 if (attr == &sysfs_state_rw) {
861 prt_string_option(out, bch2_member_states, ca->mi.state);
865 if (attr == &sysfs_iodone)
866 dev_iodone_to_text(out, ca);
868 sysfs_print(io_latency_read, atomic64_read(&ca->cur_latency[READ]));
869 sysfs_print(io_latency_write, atomic64_read(&ca->cur_latency[WRITE]));
871 if (attr == &sysfs_io_latency_stats_read)
872 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
874 if (attr == &sysfs_io_latency_stats_write)
875 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
877 sysfs_printf(congested, "%u%%",
878 clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
879 * 100 / CONGESTED_MAX);
881 if (attr == &sysfs_alloc_debug)
882 dev_alloc_debug_to_text(out, ca);
889 struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
890 struct bch_fs *c = ca->fs;
891 struct bch_member *mi;
893 if (attr == &sysfs_discard) {
894 bool v = strtoul_or_return(buf);
896 mutex_lock(&c->sb_lock);
897 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
899 if (v != BCH_MEMBER_DISCARD(mi)) {
900 SET_BCH_MEMBER_DISCARD(mi, v);
903 mutex_unlock(&c->sb_lock);
906 if (attr == &sysfs_durability) {
907 u64 v = strtoul_or_return(buf);
909 mutex_lock(&c->sb_lock);
910 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
912 if (v != BCH_MEMBER_DURABILITY(mi)) {
913 SET_BCH_MEMBER_DURABILITY(mi, v + 1);
916 mutex_unlock(&c->sb_lock);
919 if (attr == &sysfs_label) {
923 tmp = kstrdup(buf, GFP_KERNEL);
927 ret = bch2_dev_group_set(c, ca, strim(tmp));
937 struct attribute *bch2_dev_files[] = {
952 &sysfs_io_latency_read,
953 &sysfs_io_latency_write,
954 &sysfs_io_latency_stats_read,
955 &sysfs_io_latency_stats_write,
963 #endif /* _BCACHEFS_SYSFS_H_ */