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"
14 #include "btree_cache.h"
16 #include "btree_iter.h"
17 #include "btree_key_cache.h"
18 #include "btree_update.h"
19 #include "btree_update_interior.h"
23 #include "disk_groups.h"
30 #include "rebalance.h"
35 #include <linux/blkdev.h>
36 #include <linux/sort.h>
37 #include <linux/sched/clock.h>
41 #define SYSFS_OPS(type) \
42 struct sysfs_ops type ## _sysfs_ops = { \
43 .show = type ## _show, \
44 .store = type ## _store \
48 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
52 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
53 const char *buf, size_t size) \
55 #define __sysfs_attribute(_name, _mode) \
56 static struct attribute sysfs_##_name = \
57 { .name = #_name, .mode = _mode }
59 #define write_attribute(n) __sysfs_attribute(n, S_IWUSR)
60 #define read_attribute(n) __sysfs_attribute(n, S_IRUGO)
61 #define rw_attribute(n) __sysfs_attribute(n, S_IRUGO|S_IWUSR)
63 #define sysfs_printf(file, fmt, ...) \
65 if (attr == &sysfs_ ## file) \
66 return scnprintf(buf, PAGE_SIZE, fmt "\n", __VA_ARGS__);\
69 #define sysfs_print(file, var) \
71 if (attr == &sysfs_ ## file) \
72 return snprint(buf, PAGE_SIZE, var); \
75 #define sysfs_hprint(file, val) \
77 if (attr == &sysfs_ ## file) { \
78 bch2_hprint(&out, val); \
80 return out.pos - buf; \
84 #define var_printf(_var, fmt) sysfs_printf(_var, fmt, var(_var))
85 #define var_print(_var) sysfs_print(_var, var(_var))
86 #define var_hprint(_var) sysfs_hprint(_var, var(_var))
88 #define sysfs_strtoul(file, var) \
90 if (attr == &sysfs_ ## file) \
91 return strtoul_safe(buf, var) ?: (ssize_t) size; \
94 #define sysfs_strtoul_clamp(file, var, min, max) \
96 if (attr == &sysfs_ ## file) \
97 return strtoul_safe_clamp(buf, var, min, max) \
101 #define strtoul_or_return(cp) \
104 int _r = kstrtoul(cp, 10, &_v); \
110 #define strtoul_restrict_or_return(cp, min, max) \
112 unsigned long __v = 0; \
113 int _r = strtoul_safe_restrict(cp, __v, min, max); \
119 #define strtoi_h_or_return(cp) \
122 int _r = strtoi_h(cp, &_v); \
128 #define sysfs_hatoi(file, var) \
130 if (attr == &sysfs_ ## file) \
131 return strtoi_h(buf, &var) ?: (ssize_t) size; \
134 write_attribute(trigger_journal_flush);
135 write_attribute(trigger_btree_coalesce);
136 write_attribute(trigger_gc);
137 write_attribute(prune_cache);
138 rw_attribute(btree_gc_periodic);
140 read_attribute(uuid);
141 read_attribute(minor);
142 read_attribute(bucket_size);
143 read_attribute(block_size);
144 read_attribute(btree_node_size);
145 read_attribute(first_bucket);
146 read_attribute(nbuckets);
147 read_attribute(durability);
148 read_attribute(iodone);
150 read_attribute(io_latency_read);
151 read_attribute(io_latency_write);
152 read_attribute(io_latency_stats_read);
153 read_attribute(io_latency_stats_write);
154 read_attribute(congested);
156 read_attribute(bucket_quantiles_last_read);
157 read_attribute(bucket_quantiles_last_write);
158 read_attribute(bucket_quantiles_fragmentation);
159 read_attribute(bucket_quantiles_oldest_gen);
161 read_attribute(reserve_stats);
162 read_attribute(btree_cache_size);
163 read_attribute(compression_stats);
164 read_attribute(journal_debug);
165 read_attribute(journal_pins);
166 read_attribute(btree_updates);
167 read_attribute(dirty_btree_nodes);
168 read_attribute(btree_cache);
169 read_attribute(btree_key_cache);
170 read_attribute(btree_transactions);
171 read_attribute(stripes_heap);
173 read_attribute(internal_uuid);
175 read_attribute(has_data);
176 read_attribute(alloc_debug);
177 write_attribute(wake_allocator);
179 read_attribute(read_realloc_races);
180 read_attribute(extent_migrate_done);
181 read_attribute(extent_migrate_raced);
183 rw_attribute(journal_write_delay_ms);
184 rw_attribute(journal_reclaim_delay_ms);
186 rw_attribute(discard);
187 rw_attribute(cache_replacement_policy);
190 rw_attribute(copy_gc_enabled);
191 sysfs_pd_controller_attribute(copy_gc);
193 rw_attribute(rebalance_enabled);
194 sysfs_pd_controller_attribute(rebalance);
195 read_attribute(rebalance_work);
196 rw_attribute(promote_whole_extents);
198 read_attribute(new_stripes);
200 rw_attribute(pd_controllers_update_seconds);
202 read_attribute(io_timers_read);
203 read_attribute(io_timers_write);
205 #ifdef CONFIG_BCACHEFS_TESTS
206 write_attribute(perf_test);
207 #endif /* CONFIG_BCACHEFS_TESTS */
210 static struct attribute sysfs_time_stat_##_name = \
211 { .name = #_name, .mode = S_IRUGO };
215 static struct attribute sysfs_state_rw = {
220 static size_t bch2_btree_cache_size(struct bch_fs *c)
225 mutex_lock(&c->btree_cache.lock);
226 list_for_each_entry(b, &c->btree_cache.live, list)
227 ret += btree_bytes(c);
229 mutex_unlock(&c->btree_cache.lock);
233 static int fs_alloc_debug_to_text(struct printbuf *out, struct bch_fs *c)
235 struct bch_fs_usage *fs_usage = bch2_fs_usage_read(c);
240 bch2_fs_usage_to_text(out, c, fs_usage);
242 percpu_up_read(&c->mark_lock);
248 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
250 struct btree_trans trans;
251 struct btree_iter *iter;
253 u64 nr_uncompressed_extents = 0, uncompressed_sectors = 0,
254 nr_compressed_extents = 0,
255 compressed_sectors_compressed = 0,
256 compressed_sectors_uncompressed = 0;
259 if (!test_bit(BCH_FS_STARTED, &c->flags))
262 bch2_trans_init(&trans, c, 0, 0);
264 for_each_btree_key(&trans, iter, BTREE_ID_extents, POS_MIN, 0, k, ret)
265 if (k.k->type == KEY_TYPE_extent) {
266 struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
267 const union bch_extent_entry *entry;
268 struct extent_ptr_decoded p;
270 extent_for_each_ptr_decode(e, p, entry) {
271 if (!crc_is_compressed(p.crc)) {
272 nr_uncompressed_extents++;
273 uncompressed_sectors += e.k->size;
275 nr_compressed_extents++;
276 compressed_sectors_compressed +=
277 p.crc.compressed_size;
278 compressed_sectors_uncompressed +=
279 p.crc.uncompressed_size;
282 /* only looking at the first ptr */
287 ret = bch2_trans_exit(&trans) ?: ret;
292 "uncompressed data:\n"
293 " nr extents: %llu\n"
294 " size (bytes): %llu\n"
296 " nr extents: %llu\n"
297 " compressed size (bytes): %llu\n"
298 " uncompressed size (bytes): %llu\n",
299 nr_uncompressed_extents,
300 uncompressed_sectors << 9,
301 nr_compressed_extents,
302 compressed_sectors_compressed << 9,
303 compressed_sectors_uncompressed << 9);
309 struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
310 struct printbuf out = _PBUF(buf, PAGE_SIZE);
312 sysfs_print(minor, c->minor);
313 sysfs_printf(internal_uuid, "%pU", c->sb.uuid.b);
315 sysfs_print(journal_write_delay_ms, c->journal.write_delay_ms);
316 sysfs_print(journal_reclaim_delay_ms, c->journal.reclaim_delay_ms);
318 sysfs_print(block_size, block_bytes(c));
319 sysfs_print(btree_node_size, btree_bytes(c));
320 sysfs_hprint(btree_cache_size, bch2_btree_cache_size(c));
322 sysfs_print(read_realloc_races,
323 atomic_long_read(&c->read_realloc_races));
324 sysfs_print(extent_migrate_done,
325 atomic_long_read(&c->extent_migrate_done));
326 sysfs_print(extent_migrate_raced,
327 atomic_long_read(&c->extent_migrate_raced));
329 sysfs_printf(btree_gc_periodic, "%u", (int) c->btree_gc_periodic);
331 sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
333 sysfs_print(pd_controllers_update_seconds,
334 c->pd_controllers_update_seconds);
336 sysfs_printf(rebalance_enabled, "%i", c->rebalance.enabled);
337 sysfs_pd_controller_show(rebalance, &c->rebalance.pd); /* XXX */
338 sysfs_pd_controller_show(copy_gc, &c->copygc_pd);
340 if (attr == &sysfs_rebalance_work) {
341 bch2_rebalance_work_to_text(&out, c);
342 return out.pos - buf;
345 sysfs_print(promote_whole_extents, c->promote_whole_extents);
349 if (attr == &sysfs_alloc_debug)
350 return fs_alloc_debug_to_text(&out, c) ?: out.pos - buf;
352 if (attr == &sysfs_journal_debug) {
353 bch2_journal_debug_to_text(&out, &c->journal);
354 return out.pos - buf;
357 if (attr == &sysfs_journal_pins) {
358 bch2_journal_pins_to_text(&out, &c->journal);
359 return out.pos - buf;
362 if (attr == &sysfs_btree_updates) {
363 bch2_btree_updates_to_text(&out, c);
364 return out.pos - buf;
367 if (attr == &sysfs_dirty_btree_nodes) {
368 bch2_dirty_btree_nodes_to_text(&out, c);
369 return out.pos - buf;
372 if (attr == &sysfs_btree_cache) {
373 bch2_btree_cache_to_text(&out, c);
374 return out.pos - buf;
377 if (attr == &sysfs_btree_key_cache) {
378 bch2_btree_key_cache_to_text(&out, &c->btree_key_cache);
379 return out.pos - buf;
382 if (attr == &sysfs_btree_transactions) {
383 bch2_btree_trans_to_text(&out, c);
384 return out.pos - buf;
387 if (attr == &sysfs_stripes_heap) {
388 bch2_stripes_heap_to_text(&out, c);
389 return out.pos - buf;
392 if (attr == &sysfs_compression_stats) {
393 bch2_compression_stats_to_text(&out, c);
394 return out.pos - buf;
397 if (attr == &sysfs_new_stripes) {
398 bch2_new_stripes_to_text(&out, c);
399 return out.pos - buf;
402 if (attr == &sysfs_io_timers_read) {
403 bch2_io_timers_to_text(&out, &c->io_clock[READ]);
404 return out.pos - buf;
406 if (attr == &sysfs_io_timers_write) {
407 bch2_io_timers_to_text(&out, &c->io_clock[WRITE]);
408 return out.pos - buf;
416 struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
418 sysfs_strtoul(journal_write_delay_ms, c->journal.write_delay_ms);
419 sysfs_strtoul(journal_reclaim_delay_ms, c->journal.reclaim_delay_ms);
421 if (attr == &sysfs_btree_gc_periodic) {
422 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
425 wake_up_process(c->gc_thread);
429 if (attr == &sysfs_copy_gc_enabled) {
430 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
433 if (c->copygc_thread)
434 wake_up_process(c->copygc_thread);
438 if (attr == &sysfs_rebalance_enabled) {
439 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
446 sysfs_strtoul(pd_controllers_update_seconds,
447 c->pd_controllers_update_seconds);
448 sysfs_pd_controller_store(rebalance, &c->rebalance.pd);
449 sysfs_pd_controller_store(copy_gc, &c->copygc_pd);
451 sysfs_strtoul(promote_whole_extents, c->promote_whole_extents);
455 if (!test_bit(BCH_FS_STARTED, &c->flags))
460 if (attr == &sysfs_trigger_journal_flush)
461 bch2_journal_meta(&c->journal);
463 if (attr == &sysfs_trigger_btree_coalesce)
466 if (attr == &sysfs_trigger_gc) {
468 * Full gc is currently incompatible with btree key cache:
471 down_read(&c->state_lock);
472 bch2_gc(c, false, false);
473 up_read(&c->state_lock);
479 if (attr == &sysfs_prune_cache) {
480 struct shrink_control sc;
482 sc.gfp_mask = GFP_KERNEL;
483 sc.nr_to_scan = strtoul_or_return(buf);
484 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
487 #ifdef CONFIG_BCACHEFS_TESTS
488 if (attr == &sysfs_perf_test) {
489 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
490 char *test = strsep(&p, " \t\n");
491 char *nr_str = strsep(&p, " \t\n");
492 char *threads_str = strsep(&p, " \t\n");
498 !(ret = kstrtouint(threads_str, 10, &threads)) &&
499 !(ret = bch2_strtoull_h(nr_str, &nr)))
500 ret = bch2_btree_perf_test(c, test, nr, threads);
511 struct attribute *bch2_fs_files[] = {
514 &sysfs_btree_node_size,
515 &sysfs_btree_cache_size,
517 &sysfs_journal_write_delay_ms,
518 &sysfs_journal_reclaim_delay_ms,
520 &sysfs_promote_whole_extents,
522 &sysfs_compression_stats,
524 #ifdef CONFIG_BCACHEFS_TESTS
530 /* internal dir - just a wrapper */
532 SHOW(bch2_fs_internal)
534 struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
535 return bch2_fs_show(&c->kobj, attr, buf);
538 STORE(bch2_fs_internal)
540 struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
541 return bch2_fs_store(&c->kobj, attr, buf, size);
543 SYSFS_OPS(bch2_fs_internal);
545 struct attribute *bch2_fs_internal_files[] = {
547 &sysfs_journal_debug,
549 &sysfs_btree_updates,
550 &sysfs_dirty_btree_nodes,
552 &sysfs_btree_key_cache,
553 &sysfs_btree_transactions,
556 &sysfs_read_realloc_races,
557 &sysfs_extent_migrate_done,
558 &sysfs_extent_migrate_raced,
560 &sysfs_trigger_journal_flush,
561 &sysfs_trigger_btree_coalesce,
565 &sysfs_copy_gc_enabled,
567 &sysfs_rebalance_enabled,
568 &sysfs_rebalance_work,
569 sysfs_pd_controller_files(rebalance),
570 sysfs_pd_controller_files(copy_gc),
574 &sysfs_io_timers_read,
575 &sysfs_io_timers_write,
577 &sysfs_internal_uuid,
583 SHOW(bch2_fs_opts_dir)
585 struct printbuf out = _PBUF(buf, PAGE_SIZE);
586 struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
587 const struct bch_option *opt = container_of(attr, struct bch_option, attr);
588 int id = opt - bch2_opt_table;
589 u64 v = bch2_opt_get_by_id(&c->opts, id);
591 bch2_opt_to_text(&out, c, opt, v, OPT_SHOW_FULL_LIST);
594 return out.pos - buf;
597 STORE(bch2_fs_opts_dir)
599 struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
600 const struct bch_option *opt = container_of(attr, struct bch_option, attr);
601 int ret, id = opt - bch2_opt_table;
605 tmp = kstrdup(buf, GFP_KERNEL);
609 ret = bch2_opt_parse(c, opt, strim(tmp), &v);
615 ret = bch2_opt_check_may_set(c, id, v);
619 if (opt->set_sb != SET_NO_SB_OPT) {
620 mutex_lock(&c->sb_lock);
621 opt->set_sb(c->disk_sb.sb, v);
623 mutex_unlock(&c->sb_lock);
626 bch2_opt_set_by_id(&c->opts, id, v);
628 if ((id == Opt_background_target ||
629 id == Opt_background_compression) && v) {
630 bch2_rebalance_add_work(c, S64_MAX);
636 SYSFS_OPS(bch2_fs_opts_dir);
638 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
640 int bch2_opts_create_sysfs_files(struct kobject *kobj)
642 const struct bch_option *i;
645 for (i = bch2_opt_table;
646 i < bch2_opt_table + bch2_opts_nr;
648 if (!(i->mode & (OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME)))
651 ret = sysfs_create_file(kobj, &i->attr);
661 SHOW(bch2_fs_time_stats)
663 struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
664 struct printbuf out = _PBUF(buf, PAGE_SIZE);
667 if (attr == &sysfs_time_stat_##name) { \
668 bch2_time_stats_to_text(&out, &c->times[BCH_TIME_##name]);\
669 return out.pos - buf; \
677 STORE(bch2_fs_time_stats)
681 SYSFS_OPS(bch2_fs_time_stats);
683 struct attribute *bch2_fs_time_stats_files[] = {
685 &sysfs_time_stat_##name,
691 typedef unsigned (bucket_map_fn)(struct bch_fs *, struct bch_dev *,
694 static unsigned bucket_last_io_fn(struct bch_fs *c, struct bch_dev *ca,
695 size_t b, void *private)
697 int rw = (private ? 1 : 0);
699 return atomic64_read(&c->io_clock[rw].now) - bucket(ca, b)->io_time[rw];
702 static unsigned bucket_sectors_used_fn(struct bch_fs *c, struct bch_dev *ca,
703 size_t b, void *private)
705 struct bucket *g = bucket(ca, b);
706 return bucket_sectors_used(g->mark);
709 static unsigned bucket_oldest_gen_fn(struct bch_fs *c, struct bch_dev *ca,
710 size_t b, void *private)
712 return bucket_gc_gen(bucket(ca, b));
715 static int unsigned_cmp(const void *_l, const void *_r)
717 const unsigned *l = _l;
718 const unsigned *r = _r;
720 return cmp_int(*l, *r);
723 static int quantiles_to_text(struct printbuf *out,
724 struct bch_fs *c, struct bch_dev *ca,
725 bucket_map_fn *fn, void *private)
728 /* Compute 31 quantiles */
731 down_read(&ca->bucket_lock);
734 p = vzalloc(n * sizeof(unsigned));
736 up_read(&ca->bucket_lock);
740 for (i = ca->mi.first_bucket; i < n; i++)
741 p[i] = fn(c, ca, i, private);
743 sort(p, n, sizeof(unsigned), unsigned_cmp, NULL);
744 up_read(&ca->bucket_lock);
750 for (i = 0; i < ARRAY_SIZE(q); i++)
751 q[i] = p[n * (i + 1) / (ARRAY_SIZE(q) + 1)];
755 for (i = 0; i < ARRAY_SIZE(q); i++)
756 pr_buf(out, "%u ", q[i]);
761 static void reserve_stats_to_text(struct printbuf *out, struct bch_dev *ca)
763 enum alloc_reserve i;
765 spin_lock(&ca->fs->freelist_lock);
767 pr_buf(out, "free_inc:\t%zu\t%zu\n",
768 fifo_used(&ca->free_inc),
771 for (i = 0; i < RESERVE_NR; i++)
772 pr_buf(out, "free[%u]:\t%zu\t%zu\n", i,
773 fifo_used(&ca->free[i]),
776 spin_unlock(&ca->fs->freelist_lock);
779 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
781 struct bch_fs *c = ca->fs;
782 struct bch_dev_usage stats = bch2_dev_usage_read(ca);
783 unsigned i, nr[BCH_DATA_NR];
785 memset(nr, 0, sizeof(nr));
787 for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
788 nr[c->open_buckets[i].type]++;
791 "\t\t buckets\t sectors fragmented\n"
793 ca->mi.nbuckets - ca->mi.first_bucket);
795 for (i = 1; i < BCH_DATA_NR; i++)
796 pr_buf(out, "%-8s%16llu%16llu%16llu\n",
797 bch2_data_types[i], stats.d[i].buckets,
798 stats.d[i].sectors, stats.d[i].fragmented);
805 "free_inc\t\t%zu/%zu\n"
806 "free[RESERVE_MOVINGGC]\t%zu/%zu\n"
807 "free[RESERVE_NONE]\t%zu/%zu\n"
808 "freelist_wait\t\t%s\n"
809 "open buckets\t\t%u/%u (reserved %u)\n"
810 "open_buckets_wait\t%s\n"
811 "open_buckets_btree\t%u\n"
812 "open_buckets_user\t%u\n"
813 "btree reserve cache\t%u\n",
815 __dev_buckets_available(ca, stats),
817 fifo_used(&ca->free_inc), ca->free_inc.size,
818 fifo_used(&ca->free[RESERVE_MOVINGGC]), ca->free[RESERVE_MOVINGGC].size,
819 fifo_used(&ca->free[RESERVE_NONE]), ca->free[RESERVE_NONE].size,
820 c->freelist_wait.list.first ? "waiting" : "empty",
821 c->open_buckets_nr_free, OPEN_BUCKETS_COUNT,
822 BTREE_NODE_OPEN_BUCKET_RESERVE,
823 c->open_buckets_wait.list.first ? "waiting" : "empty",
826 c->btree_reserve_cache_nr);
829 static const char * const bch2_rw[] = {
835 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
839 for (rw = 0; rw < 2; rw++) {
840 pr_buf(out, "%s:\n", bch2_rw[rw]);
842 for (i = 1; i < BCH_DATA_NR; i++)
843 pr_buf(out, "%-12s:%12llu\n",
845 percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
851 struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
852 struct bch_fs *c = ca->fs;
853 struct printbuf out = _PBUF(buf, PAGE_SIZE);
855 sysfs_printf(uuid, "%pU\n", ca->uuid.b);
857 sysfs_print(bucket_size, bucket_bytes(ca));
858 sysfs_print(block_size, block_bytes(c));
859 sysfs_print(first_bucket, ca->mi.first_bucket);
860 sysfs_print(nbuckets, ca->mi.nbuckets);
861 sysfs_print(durability, ca->mi.durability);
862 sysfs_print(discard, ca->mi.discard);
864 if (attr == &sysfs_label) {
866 mutex_lock(&c->sb_lock);
867 bch2_disk_path_to_text(&out, &c->disk_sb,
869 mutex_unlock(&c->sb_lock);
873 return out.pos - buf;
876 if (attr == &sysfs_has_data) {
877 bch2_flags_to_text(&out, bch2_data_types,
878 bch2_dev_has_data(c, ca));
880 return out.pos - buf;
883 if (attr == &sysfs_cache_replacement_policy) {
884 bch2_string_opt_to_text(&out,
885 bch2_cache_replacement_policies,
888 return out.pos - buf;
891 if (attr == &sysfs_state_rw) {
892 bch2_string_opt_to_text(&out, bch2_member_states,
895 return out.pos - buf;
898 if (attr == &sysfs_iodone) {
899 dev_iodone_to_text(&out, ca);
900 return out.pos - buf;
903 sysfs_print(io_latency_read, atomic64_read(&ca->cur_latency[READ]));
904 sysfs_print(io_latency_write, atomic64_read(&ca->cur_latency[WRITE]));
906 if (attr == &sysfs_io_latency_stats_read) {
907 bch2_time_stats_to_text(&out, &ca->io_latency[READ]);
908 return out.pos - buf;
910 if (attr == &sysfs_io_latency_stats_write) {
911 bch2_time_stats_to_text(&out, &ca->io_latency[WRITE]);
912 return out.pos - buf;
915 sysfs_printf(congested, "%u%%",
916 clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
917 * 100 / CONGESTED_MAX);
919 if (attr == &sysfs_bucket_quantiles_last_read)
920 return quantiles_to_text(&out, c, ca, bucket_last_io_fn, (void *) 0) ?: out.pos - buf;
921 if (attr == &sysfs_bucket_quantiles_last_write)
922 return quantiles_to_text(&out, c, ca, bucket_last_io_fn, (void *) 1) ?: out.pos - buf;
923 if (attr == &sysfs_bucket_quantiles_fragmentation)
924 return quantiles_to_text(&out, c, ca, bucket_sectors_used_fn, NULL) ?: out.pos - buf;
925 if (attr == &sysfs_bucket_quantiles_oldest_gen)
926 return quantiles_to_text(&out, c, ca, bucket_oldest_gen_fn, NULL) ?: out.pos - buf;
928 if (attr == &sysfs_reserve_stats) {
929 reserve_stats_to_text(&out, ca);
930 return out.pos - buf;
932 if (attr == &sysfs_alloc_debug) {
933 dev_alloc_debug_to_text(&out, ca);
934 return out.pos - buf;
942 struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
943 struct bch_fs *c = ca->fs;
944 struct bch_member *mi;
946 if (attr == &sysfs_discard) {
947 bool v = strtoul_or_return(buf);
949 mutex_lock(&c->sb_lock);
950 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
952 if (v != BCH_MEMBER_DISCARD(mi)) {
953 SET_BCH_MEMBER_DISCARD(mi, v);
956 mutex_unlock(&c->sb_lock);
959 if (attr == &sysfs_cache_replacement_policy) {
960 ssize_t v = __sysfs_match_string(bch2_cache_replacement_policies, -1, buf);
965 mutex_lock(&c->sb_lock);
966 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
968 if ((unsigned) v != BCH_MEMBER_REPLACEMENT(mi)) {
969 SET_BCH_MEMBER_REPLACEMENT(mi, v);
972 mutex_unlock(&c->sb_lock);
975 if (attr == &sysfs_label) {
979 tmp = kstrdup(buf, GFP_KERNEL);
983 ret = bch2_dev_group_set(c, ca, strim(tmp));
989 if (attr == &sysfs_wake_allocator)
990 bch2_wake_allocator(ca);
996 struct attribute *bch2_dev_files[] = {
1000 &sysfs_first_bucket,
1006 &sysfs_cache_replacement_policy,
1013 &sysfs_io_latency_read,
1014 &sysfs_io_latency_write,
1015 &sysfs_io_latency_stats_read,
1016 &sysfs_io_latency_stats_write,
1019 /* alloc info - other stats: */
1020 &sysfs_bucket_quantiles_last_read,
1021 &sysfs_bucket_quantiles_last_write,
1022 &sysfs_bucket_quantiles_fragmentation,
1023 &sysfs_bucket_quantiles_oldest_gen,
1025 &sysfs_reserve_stats,
1029 &sysfs_wake_allocator,
1033 #endif /* _BCACHEFS_SYSFS_H_ */