2 * bcache sysfs interfaces
4 * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com>
5 * Copyright 2012 Google, Inc.
8 #ifndef NO_BCACHEFS_SYSFS
14 #include "btree_cache.h"
16 #include "btree_iter.h"
17 #include "btree_update.h"
18 #include "btree_update_interior.h"
21 #include "disk_groups.h"
27 #include "rebalance.h"
32 #include <linux/blkdev.h>
33 #include <linux/sort.h>
34 #include <linux/sched/clock.h>
38 #define SYSFS_OPS(type) \
39 struct sysfs_ops type ## _sysfs_ops = { \
40 .show = type ## _show, \
41 .store = type ## _store \
45 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
49 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
50 const char *buf, size_t size) \
52 #define __sysfs_attribute(_name, _mode) \
53 static struct attribute sysfs_##_name = \
54 { .name = #_name, .mode = _mode }
56 #define write_attribute(n) __sysfs_attribute(n, S_IWUSR)
57 #define read_attribute(n) __sysfs_attribute(n, S_IRUGO)
58 #define rw_attribute(n) __sysfs_attribute(n, S_IRUGO|S_IWUSR)
60 #define sysfs_printf(file, fmt, ...) \
62 if (attr == &sysfs_ ## file) \
63 return scnprintf(buf, PAGE_SIZE, fmt "\n", __VA_ARGS__);\
66 #define sysfs_print(file, var) \
68 if (attr == &sysfs_ ## file) \
69 return snprint(buf, PAGE_SIZE, var); \
72 #define sysfs_hprint(file, val) \
74 if (attr == &sysfs_ ## file) { \
75 ssize_t ret = bch2_hprint(buf, val); \
81 #define var_printf(_var, fmt) sysfs_printf(_var, fmt, var(_var))
82 #define var_print(_var) sysfs_print(_var, var(_var))
83 #define var_hprint(_var) sysfs_hprint(_var, var(_var))
85 #define sysfs_strtoul(file, var) \
87 if (attr == &sysfs_ ## file) \
88 return strtoul_safe(buf, var) ?: (ssize_t) size; \
91 #define sysfs_strtoul_clamp(file, var, min, max) \
93 if (attr == &sysfs_ ## file) \
94 return strtoul_safe_clamp(buf, var, min, max) \
98 #define strtoul_or_return(cp) \
101 int _r = kstrtoul(cp, 10, &_v); \
107 #define strtoul_restrict_or_return(cp, min, max) \
109 unsigned long __v = 0; \
110 int _r = strtoul_safe_restrict(cp, __v, min, max); \
116 #define strtoi_h_or_return(cp) \
119 int _r = strtoi_h(cp, &_v); \
125 #define sysfs_hatoi(file, var) \
127 if (attr == &sysfs_ ## file) \
128 return strtoi_h(buf, &var) ?: (ssize_t) size; \
131 write_attribute(trigger_journal_flush);
132 write_attribute(trigger_btree_coalesce);
133 write_attribute(trigger_gc);
134 write_attribute(prune_cache);
135 rw_attribute(btree_gc_periodic);
137 read_attribute(uuid);
138 read_attribute(minor);
139 read_attribute(bucket_size);
140 read_attribute(block_size);
141 read_attribute(btree_node_size);
142 read_attribute(first_bucket);
143 read_attribute(nbuckets);
144 read_attribute(durability);
145 read_attribute(iodone);
147 read_attribute(io_latency_read);
148 read_attribute(io_latency_write);
149 read_attribute(io_latency_stats_read);
150 read_attribute(io_latency_stats_write);
151 read_attribute(congested);
153 read_attribute(bucket_quantiles_last_read);
154 read_attribute(bucket_quantiles_last_write);
155 read_attribute(bucket_quantiles_fragmentation);
156 read_attribute(bucket_quantiles_oldest_gen);
158 read_attribute(reserve_stats);
159 read_attribute(btree_cache_size);
160 read_attribute(compression_stats);
161 read_attribute(journal_debug);
162 read_attribute(journal_pins);
163 read_attribute(btree_updates);
164 read_attribute(dirty_btree_nodes);
166 read_attribute(internal_uuid);
168 read_attribute(has_data);
169 read_attribute(alloc_debug);
170 write_attribute(wake_allocator);
172 read_attribute(read_realloc_races);
173 read_attribute(extent_migrate_done);
174 read_attribute(extent_migrate_raced);
176 rw_attribute(journal_write_delay_ms);
177 rw_attribute(journal_reclaim_delay_ms);
179 rw_attribute(discard);
180 rw_attribute(cache_replacement_policy);
183 rw_attribute(copy_gc_enabled);
184 sysfs_pd_controller_attribute(copy_gc);
186 rw_attribute(rebalance_enabled);
187 sysfs_pd_controller_attribute(rebalance);
188 read_attribute(rebalance_work);
189 rw_attribute(promote_whole_extents);
191 rw_attribute(pd_controllers_update_seconds);
193 read_attribute(meta_replicas_have);
194 read_attribute(data_replicas_have);
196 #ifdef CONFIG_BCACHEFS_TESTS
197 write_attribute(perf_test);
198 #endif /* CONFIG_BCACHEFS_TESTS */
200 #define BCH_DEBUG_PARAM(name, description) \
204 #undef BCH_DEBUG_PARAM
207 static struct attribute sysfs_time_stat_##_name = \
208 { .name = #_name, .mode = S_IRUGO };
212 static struct attribute sysfs_state_rw = {
217 static size_t bch2_btree_cache_size(struct bch_fs *c)
222 mutex_lock(&c->btree_cache.lock);
223 list_for_each_entry(b, &c->btree_cache.live, list)
224 ret += btree_bytes(c);
226 mutex_unlock(&c->btree_cache.lock);
230 static ssize_t show_fs_alloc_debug(struct bch_fs *c, char *buf)
232 struct bch_fs_usage stats = bch2_fs_usage_read(c);
234 return scnprintf(buf, PAGE_SIZE,
235 "capacity:\t\t%llu\n"
239 "\treserved:\t%llu\n"
243 "\treserved:\t%llu\n"
247 "\treserved:\t%llu\n"
251 "\treserved:\t%llu\n"
252 "online reserved:\t%llu\n",
254 stats.s[0].data[S_META],
255 stats.s[0].data[S_DIRTY],
256 stats.s[0].persistent_reserved,
257 stats.s[1].data[S_META],
258 stats.s[1].data[S_DIRTY],
259 stats.s[1].persistent_reserved,
260 stats.s[2].data[S_META],
261 stats.s[2].data[S_DIRTY],
262 stats.s[2].persistent_reserved,
263 stats.s[3].data[S_META],
264 stats.s[3].data[S_DIRTY],
265 stats.s[3].persistent_reserved,
266 stats.online_reserved);
269 static ssize_t bch2_compression_stats(struct bch_fs *c, char *buf)
271 struct btree_iter iter;
273 u64 nr_uncompressed_extents = 0, uncompressed_sectors = 0,
274 nr_compressed_extents = 0,
275 compressed_sectors_compressed = 0,
276 compressed_sectors_uncompressed = 0;
278 if (!bch2_fs_running(c))
281 for_each_btree_key(&iter, c, BTREE_ID_EXTENTS, POS_MIN, 0, k)
282 if (k.k->type == BCH_EXTENT) {
283 struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
284 const struct bch_extent_ptr *ptr;
285 struct bch_extent_crc_unpacked crc;
287 extent_for_each_ptr_crc(e, ptr, crc) {
288 if (crc.compression_type == BCH_COMPRESSION_NONE) {
289 nr_uncompressed_extents++;
290 uncompressed_sectors += e.k->size;
292 nr_compressed_extents++;
293 compressed_sectors_compressed +=
295 compressed_sectors_uncompressed +=
296 crc.uncompressed_size;
299 /* only looking at the first ptr */
303 bch2_btree_iter_unlock(&iter);
305 return scnprintf(buf, PAGE_SIZE,
306 "uncompressed data:\n"
307 " nr extents: %llu\n"
308 " size (bytes): %llu\n"
310 " nr extents: %llu\n"
311 " compressed size (bytes): %llu\n"
312 " uncompressed size (bytes): %llu\n",
313 nr_uncompressed_extents,
314 uncompressed_sectors << 9,
315 nr_compressed_extents,
316 compressed_sectors_compressed << 9,
317 compressed_sectors_uncompressed << 9);
322 struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
324 sysfs_print(minor, c->minor);
325 sysfs_printf(internal_uuid, "%pU", c->sb.uuid.b);
327 sysfs_print(journal_write_delay_ms, c->journal.write_delay_ms);
328 sysfs_print(journal_reclaim_delay_ms, c->journal.reclaim_delay_ms);
330 sysfs_print(block_size, block_bytes(c));
331 sysfs_print(btree_node_size, btree_bytes(c));
332 sysfs_hprint(btree_cache_size, bch2_btree_cache_size(c));
334 sysfs_print(read_realloc_races,
335 atomic_long_read(&c->read_realloc_races));
336 sysfs_print(extent_migrate_done,
337 atomic_long_read(&c->extent_migrate_done));
338 sysfs_print(extent_migrate_raced,
339 atomic_long_read(&c->extent_migrate_raced));
341 sysfs_printf(btree_gc_periodic, "%u", (int) c->btree_gc_periodic);
343 sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
345 sysfs_print(pd_controllers_update_seconds,
346 c->pd_controllers_update_seconds);
348 sysfs_printf(rebalance_enabled, "%i", c->rebalance.enabled);
349 sysfs_pd_controller_show(rebalance, &c->rebalance.pd); /* XXX */
351 if (attr == &sysfs_rebalance_work)
352 return bch2_rebalance_work_show(c, buf);
354 sysfs_print(promote_whole_extents, c->promote_whole_extents);
356 sysfs_printf(meta_replicas_have, "%u", bch2_replicas_online(c, true));
357 sysfs_printf(data_replicas_have, "%u", bch2_replicas_online(c, false));
361 if (attr == &sysfs_alloc_debug)
362 return show_fs_alloc_debug(c, buf);
364 if (attr == &sysfs_journal_debug)
365 return bch2_journal_print_debug(&c->journal, buf);
367 if (attr == &sysfs_journal_pins)
368 return bch2_journal_print_pins(&c->journal, buf);
370 if (attr == &sysfs_btree_updates)
371 return bch2_btree_updates_print(c, buf);
373 if (attr == &sysfs_dirty_btree_nodes)
374 return bch2_dirty_btree_nodes_print(c, buf);
376 if (attr == &sysfs_compression_stats)
377 return bch2_compression_stats(c, buf);
379 #define BCH_DEBUG_PARAM(name, description) sysfs_print(name, c->name);
381 #undef BCH_DEBUG_PARAM
388 struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
390 sysfs_strtoul(journal_write_delay_ms, c->journal.write_delay_ms);
391 sysfs_strtoul(journal_reclaim_delay_ms, c->journal.reclaim_delay_ms);
393 if (attr == &sysfs_btree_gc_periodic) {
394 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
397 wake_up_process(c->gc_thread);
401 if (attr == &sysfs_copy_gc_enabled) {
404 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
407 for_each_member_device(ca, c, i)
408 if (ca->copygc_thread)
409 wake_up_process(ca->copygc_thread);
413 if (attr == &sysfs_rebalance_enabled) {
414 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
421 sysfs_strtoul(pd_controllers_update_seconds,
422 c->pd_controllers_update_seconds);
423 sysfs_pd_controller_store(rebalance, &c->rebalance.pd);
425 sysfs_strtoul(promote_whole_extents, c->promote_whole_extents);
429 #define BCH_DEBUG_PARAM(name, description) sysfs_strtoul(name, c->name);
431 #undef BCH_DEBUG_PARAM
433 if (!bch2_fs_running(c))
438 if (attr == &sysfs_trigger_journal_flush)
439 bch2_journal_meta_async(&c->journal, NULL);
441 if (attr == &sysfs_trigger_btree_coalesce)
444 if (attr == &sysfs_trigger_gc)
447 if (attr == &sysfs_prune_cache) {
448 struct shrink_control sc;
450 sc.gfp_mask = GFP_KERNEL;
451 sc.nr_to_scan = strtoul_or_return(buf);
452 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
454 #ifdef CONFIG_BCACHEFS_TESTS
455 if (attr == &sysfs_perf_test) {
456 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
457 char *test = strsep(&p, " \t\n");
458 char *nr_str = strsep(&p, " \t\n");
459 char *threads_str = strsep(&p, " \t\n");
465 !(ret = kstrtouint(threads_str, 10, &threads)) &&
466 !(ret = bch2_strtoull_h(nr_str, &nr)))
467 bch2_btree_perf_test(c, test, nr, threads);
478 struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
480 mutex_lock(&c->state_lock);
481 size = __bch2_fs_store(kobj, attr, buf, size);
482 mutex_unlock(&c->state_lock);
488 struct attribute *bch2_fs_files[] = {
491 &sysfs_btree_node_size,
492 &sysfs_btree_cache_size,
494 &sysfs_meta_replicas_have,
495 &sysfs_data_replicas_have,
497 &sysfs_journal_write_delay_ms,
498 &sysfs_journal_reclaim_delay_ms,
500 &sysfs_promote_whole_extents,
502 &sysfs_compression_stats,
504 #ifdef CONFIG_BCACHEFS_TESTS
510 /* internal dir - just a wrapper */
512 SHOW(bch2_fs_internal)
514 struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
515 return bch2_fs_show(&c->kobj, attr, buf);
518 STORE(bch2_fs_internal)
520 struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
521 return bch2_fs_store(&c->kobj, attr, buf, size);
523 SYSFS_OPS(bch2_fs_internal);
525 struct attribute *bch2_fs_internal_files[] = {
527 &sysfs_journal_debug,
529 &sysfs_btree_updates,
530 &sysfs_dirty_btree_nodes,
532 &sysfs_read_realloc_races,
533 &sysfs_extent_migrate_done,
534 &sysfs_extent_migrate_raced,
536 &sysfs_trigger_journal_flush,
537 &sysfs_trigger_btree_coalesce,
541 &sysfs_copy_gc_enabled,
543 &sysfs_rebalance_enabled,
544 &sysfs_rebalance_work,
545 sysfs_pd_controller_files(rebalance),
547 &sysfs_internal_uuid,
549 #define BCH_DEBUG_PARAM(name, description) &sysfs_##name,
551 #undef BCH_DEBUG_PARAM
558 SHOW(bch2_fs_opts_dir)
560 char *out = buf, *end = buf + PAGE_SIZE;
561 struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
562 const struct bch_option *opt = container_of(attr, struct bch_option, attr);
563 int id = opt - bch2_opt_table;
564 u64 v = bch2_opt_get_by_id(&c->opts, id);
566 out += bch2_opt_to_text(c, out, end - out, opt, v, OPT_SHOW_FULL_LIST);
567 out += scnprintf(out, end - out, "\n");
572 STORE(bch2_fs_opts_dir)
574 struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
575 const struct bch_option *opt = container_of(attr, struct bch_option, attr);
576 int ret, id = opt - bch2_opt_table;
580 tmp = kstrdup(buf, GFP_KERNEL);
584 ret = bch2_opt_parse(c, opt, strim(tmp), &v);
590 if (id == Opt_compression ||
591 id == Opt_background_compression) {
592 int ret = bch2_check_set_has_compressed_data(c, v);
594 mutex_unlock(&c->sb_lock);
599 if (opt->set_sb != SET_NO_SB_OPT) {
600 mutex_lock(&c->sb_lock);
601 opt->set_sb(c->disk_sb.sb, v);
603 mutex_unlock(&c->sb_lock);
606 bch2_opt_set_by_id(&c->opts, id, v);
608 if ((id == Opt_background_target ||
609 id == Opt_background_compression) && v) {
610 bch2_rebalance_add_work(c, S64_MAX);
616 SYSFS_OPS(bch2_fs_opts_dir);
618 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
620 int bch2_opts_create_sysfs_files(struct kobject *kobj)
622 const struct bch_option *i;
625 for (i = bch2_opt_table;
626 i < bch2_opt_table + bch2_opts_nr;
628 if (i->mode == OPT_INTERNAL)
631 ret = sysfs_create_file(kobj, &i->attr);
641 SHOW(bch2_fs_time_stats)
643 struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
646 if (attr == &sysfs_time_stat_##name) \
647 return bch2_time_stats_print(&c->times[BCH_TIME_##name],\
655 STORE(bch2_fs_time_stats)
659 SYSFS_OPS(bch2_fs_time_stats);
661 struct attribute *bch2_fs_time_stats_files[] = {
663 &sysfs_time_stat_##name,
669 typedef unsigned (bucket_map_fn)(struct bch_fs *, struct bch_dev *,
672 static unsigned bucket_last_io_fn(struct bch_fs *c, struct bch_dev *ca,
673 size_t b, void *private)
675 int rw = (private ? 1 : 0);
677 return bucket_last_io(c, bucket(ca, b), rw);
680 static unsigned bucket_sectors_used_fn(struct bch_fs *c, struct bch_dev *ca,
681 size_t b, void *private)
683 struct bucket *g = bucket(ca, b);
684 return bucket_sectors_used(g->mark);
687 static unsigned bucket_oldest_gen_fn(struct bch_fs *c, struct bch_dev *ca,
688 size_t b, void *private)
690 return bucket_gc_gen(ca, b);
693 static int unsigned_cmp(const void *_l, const void *_r)
695 unsigned l = *((unsigned *) _l);
696 unsigned r = *((unsigned *) _r);
698 return (l > r) - (l < r);
701 static ssize_t show_quantiles(struct bch_fs *c, struct bch_dev *ca,
702 char *buf, bucket_map_fn *fn, void *private)
705 /* Compute 31 quantiles */
709 down_read(&ca->bucket_lock);
712 p = vzalloc(n * sizeof(unsigned));
714 up_read(&ca->bucket_lock);
718 for (i = ca->mi.first_bucket; i < n; i++)
719 p[i] = fn(c, ca, i, private);
721 sort(p, n, sizeof(unsigned), unsigned_cmp, NULL);
722 up_read(&ca->bucket_lock);
728 for (i = 0; i < ARRAY_SIZE(q); i++)
729 q[i] = p[n * (i + 1) / (ARRAY_SIZE(q) + 1)];
733 for (i = 0; i < ARRAY_SIZE(q); i++)
734 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
741 static ssize_t show_reserve_stats(struct bch_dev *ca, char *buf)
743 enum alloc_reserve i;
746 spin_lock(&ca->freelist_lock);
748 ret = scnprintf(buf, PAGE_SIZE,
749 "free_inc:\t%zu\t%zu\n",
750 fifo_used(&ca->free_inc),
753 for (i = 0; i < RESERVE_NR; i++)
754 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
755 "free[%u]:\t%zu\t%zu\n", i,
756 fifo_used(&ca->free[i]),
759 spin_unlock(&ca->freelist_lock);
764 static ssize_t show_dev_alloc_debug(struct bch_dev *ca, char *buf)
766 struct bch_fs *c = ca->fs;
767 struct bch_dev_usage stats = bch2_dev_usage_read(c, ca);
769 return scnprintf(buf, PAGE_SIZE,
770 "free_inc: %zu/%zu\n"
771 "free[RESERVE_BTREE]: %zu/%zu\n"
772 "free[RESERVE_MOVINGGC]: %zu/%zu\n"
773 "free[RESERVE_NONE]: %zu/%zu\n"
789 "freelist_wait: %s\n"
790 "open buckets: %u/%u (reserved %u)\n"
791 "open_buckets_wait: %s\n",
792 fifo_used(&ca->free_inc), ca->free_inc.size,
793 fifo_used(&ca->free[RESERVE_BTREE]), ca->free[RESERVE_BTREE].size,
794 fifo_used(&ca->free[RESERVE_MOVINGGC]), ca->free[RESERVE_MOVINGGC].size,
795 fifo_used(&ca->free[RESERVE_NONE]), ca->free[RESERVE_NONE].size,
796 ca->mi.nbuckets - ca->mi.first_bucket,
798 stats.buckets[BCH_DATA_SB],
799 stats.buckets[BCH_DATA_JOURNAL],
800 stats.buckets[BCH_DATA_BTREE],
801 stats.buckets[BCH_DATA_USER],
802 stats.buckets[BCH_DATA_CACHED],
803 __dev_buckets_available(ca, stats),
804 stats.sectors[BCH_DATA_SB],
805 stats.sectors[BCH_DATA_JOURNAL],
806 stats.sectors[BCH_DATA_BTREE],
807 stats.sectors[BCH_DATA_USER],
808 stats.sectors[BCH_DATA_CACHED],
809 c->freelist_wait.list.first ? "waiting" : "empty",
810 c->open_buckets_nr_free, OPEN_BUCKETS_COUNT, BTREE_NODE_RESERVE,
811 c->open_buckets_wait.list.first ? "waiting" : "empty");
814 static const char * const bch2_rw[] = {
820 static ssize_t show_dev_iodone(struct bch_dev *ca, char *buf)
822 char *out = buf, *end = buf + PAGE_SIZE;
825 for (rw = 0; rw < 2; rw++) {
826 out += scnprintf(out, end - out, "%s:\n", bch2_rw[rw]);
828 for (i = 1; i < BCH_DATA_NR; i++) {
831 for_each_possible_cpu(cpu)
832 n += per_cpu_ptr(ca->io_done, cpu)->sectors[rw][i];
834 out += scnprintf(out, end - out, "%-12s:%12llu\n",
835 bch2_data_types[i], n << 9);
844 struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
845 struct bch_fs *c = ca->fs;
846 char *out = buf, *end = buf + PAGE_SIZE;
848 sysfs_printf(uuid, "%pU\n", ca->uuid.b);
850 sysfs_print(bucket_size, bucket_bytes(ca));
851 sysfs_print(block_size, block_bytes(c));
852 sysfs_print(first_bucket, ca->mi.first_bucket);
853 sysfs_print(nbuckets, ca->mi.nbuckets);
854 sysfs_print(durability, ca->mi.durability);
855 sysfs_print(discard, ca->mi.discard);
857 if (attr == &sysfs_label) {
859 mutex_lock(&c->sb_lock);
860 out += bch2_disk_path_print(&c->disk_sb, out, end - out,
862 mutex_unlock(&c->sb_lock);
864 out += scnprintf(out, end - out, "none");
867 out += scnprintf(out, end - out, "\n");
871 if (attr == &sysfs_has_data) {
872 out += bch2_scnprint_flag_list(out, end - out,
874 bch2_dev_has_data(c, ca));
875 out += scnprintf(out, end - out, "\n");
879 sysfs_pd_controller_show(copy_gc, &ca->copygc_pd);
881 if (attr == &sysfs_cache_replacement_policy) {
882 out += bch2_scnprint_string_list(out, end - out,
883 bch2_cache_replacement_policies,
885 out += scnprintf(out, end - out, "\n");
889 if (attr == &sysfs_state_rw) {
890 out += bch2_scnprint_string_list(out, end - out,
893 out += scnprintf(out, end - out, "\n");
897 if (attr == &sysfs_iodone)
898 return show_dev_iodone(ca, buf);
900 sysfs_print(io_latency_read, atomic64_read(&ca->cur_latency[READ]));
901 sysfs_print(io_latency_write, atomic64_read(&ca->cur_latency[WRITE]));
903 if (attr == &sysfs_io_latency_stats_read)
904 return bch2_time_stats_print(&ca->io_latency[READ], buf, PAGE_SIZE);
905 if (attr == &sysfs_io_latency_stats_write)
906 return bch2_time_stats_print(&ca->io_latency[WRITE], buf, PAGE_SIZE);
908 sysfs_printf(congested, "%u%%",
909 clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
910 * 100 / CONGESTED_MAX);
912 if (attr == &sysfs_bucket_quantiles_last_read)
913 return show_quantiles(c, ca, buf, bucket_last_io_fn, (void *) 0);
914 if (attr == &sysfs_bucket_quantiles_last_write)
915 return show_quantiles(c, ca, buf, bucket_last_io_fn, (void *) 1);
916 if (attr == &sysfs_bucket_quantiles_fragmentation)
917 return show_quantiles(c, ca, buf, bucket_sectors_used_fn, NULL);
918 if (attr == &sysfs_bucket_quantiles_oldest_gen)
919 return show_quantiles(c, ca, buf, bucket_oldest_gen_fn, NULL);
921 if (attr == &sysfs_reserve_stats)
922 return show_reserve_stats(ca, buf);
923 if (attr == &sysfs_alloc_debug)
924 return show_dev_alloc_debug(ca, buf);
931 struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
932 struct bch_fs *c = ca->fs;
933 struct bch_member *mi;
935 sysfs_pd_controller_store(copy_gc, &ca->copygc_pd);
937 if (attr == &sysfs_discard) {
938 bool v = strtoul_or_return(buf);
940 mutex_lock(&c->sb_lock);
941 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
943 if (v != BCH_MEMBER_DISCARD(mi)) {
944 SET_BCH_MEMBER_DISCARD(mi, v);
947 mutex_unlock(&c->sb_lock);
950 if (attr == &sysfs_cache_replacement_policy) {
951 ssize_t v = __sysfs_match_string(bch2_cache_replacement_policies, -1, buf);
956 mutex_lock(&c->sb_lock);
957 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
959 if ((unsigned) v != BCH_MEMBER_REPLACEMENT(mi)) {
960 SET_BCH_MEMBER_REPLACEMENT(mi, v);
963 mutex_unlock(&c->sb_lock);
966 if (attr == &sysfs_label) {
970 tmp = kstrdup(buf, GFP_KERNEL);
974 ret = bch2_dev_group_set(c, ca, strim(tmp));
980 if (attr == &sysfs_wake_allocator)
981 bch2_wake_allocator(ca);
987 struct attribute *bch2_dev_files[] = {
997 &sysfs_cache_replacement_policy,
1004 &sysfs_io_latency_read,
1005 &sysfs_io_latency_write,
1006 &sysfs_io_latency_stats_read,
1007 &sysfs_io_latency_stats_write,
1010 /* alloc info - other stats: */
1011 &sysfs_bucket_quantiles_last_read,
1012 &sysfs_bucket_quantiles_last_write,
1013 &sysfs_bucket_quantiles_fragmentation,
1014 &sysfs_bucket_quantiles_oldest_gen,
1016 &sysfs_reserve_stats,
1020 &sysfs_wake_allocator,
1022 sysfs_pd_controller_files(copy_gc),
1026 #endif /* _BCACHEFS_SYSFS_H_ */