// SPDX-License-Identifier: GPL-2.0 /* * bcache sysfs interfaces * * Copyright 2010, 2011 Kent Overstreet * Copyright 2012 Google, Inc. */ #ifndef NO_BCACHEFS_SYSFS #include "bcachefs.h" #include "alloc_background.h" #include "sysfs.h" #include "btree_cache.h" #include "btree_io.h" #include "btree_iter.h" #include "btree_update.h" #include "btree_update_interior.h" #include "btree_gc.h" #include "buckets.h" #include "clock.h" #include "disk_groups.h" #include "ec.h" #include "inode.h" #include "journal.h" #include "keylist.h" #include "move.h" #include "opts.h" #include "rebalance.h" #include "replicas.h" #include "super-io.h" #include "tests.h" #include #include #include #include "util.h" #define SYSFS_OPS(type) \ struct sysfs_ops type ## _sysfs_ops = { \ .show = type ## _show, \ .store = type ## _store \ } #define SHOW(fn) \ static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\ char *buf) \ #define STORE(fn) \ static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\ const char *buf, size_t size) \ #define __sysfs_attribute(_name, _mode) \ static struct attribute sysfs_##_name = \ { .name = #_name, .mode = _mode } #define write_attribute(n) __sysfs_attribute(n, S_IWUSR) #define read_attribute(n) __sysfs_attribute(n, S_IRUGO) #define rw_attribute(n) __sysfs_attribute(n, S_IRUGO|S_IWUSR) #define sysfs_printf(file, fmt, ...) \ do { \ if (attr == &sysfs_ ## file) \ return scnprintf(buf, PAGE_SIZE, fmt "\n", __VA_ARGS__);\ } while (0) #define sysfs_print(file, var) \ do { \ if (attr == &sysfs_ ## file) \ return snprint(buf, PAGE_SIZE, var); \ } while (0) #define sysfs_hprint(file, val) \ do { \ if (attr == &sysfs_ ## file) { \ struct printbuf out = _PBUF(buf, PAGE_SIZE); \ bch2_hprint(&out, val); \ pr_buf(&out, "\n"); \ return out.pos - buf; \ } \ } while (0) #define var_printf(_var, fmt) sysfs_printf(_var, fmt, var(_var)) #define var_print(_var) sysfs_print(_var, var(_var)) #define var_hprint(_var) sysfs_hprint(_var, var(_var)) #define sysfs_strtoul(file, var) \ do { \ if (attr == &sysfs_ ## file) \ return strtoul_safe(buf, var) ?: (ssize_t) size; \ } while (0) #define sysfs_strtoul_clamp(file, var, min, max) \ do { \ if (attr == &sysfs_ ## file) \ return strtoul_safe_clamp(buf, var, min, max) \ ?: (ssize_t) size; \ } while (0) #define strtoul_or_return(cp) \ ({ \ unsigned long _v; \ int _r = kstrtoul(cp, 10, &_v); \ if (_r) \ return _r; \ _v; \ }) #define strtoul_restrict_or_return(cp, min, max) \ ({ \ unsigned long __v = 0; \ int _r = strtoul_safe_restrict(cp, __v, min, max); \ if (_r) \ return _r; \ __v; \ }) #define strtoi_h_or_return(cp) \ ({ \ u64 _v; \ int _r = strtoi_h(cp, &_v); \ if (_r) \ return _r; \ _v; \ }) #define sysfs_hatoi(file, var) \ do { \ if (attr == &sysfs_ ## file) \ return strtoi_h(buf, &var) ?: (ssize_t) size; \ } while (0) write_attribute(trigger_journal_flush); write_attribute(trigger_btree_coalesce); write_attribute(trigger_gc); write_attribute(trigger_alloc_write); write_attribute(prune_cache); rw_attribute(btree_gc_periodic); read_attribute(uuid); read_attribute(minor); read_attribute(bucket_size); read_attribute(block_size); read_attribute(btree_node_size); read_attribute(first_bucket); read_attribute(nbuckets); read_attribute(durability); read_attribute(iodone); read_attribute(io_latency_read); read_attribute(io_latency_write); read_attribute(io_latency_stats_read); read_attribute(io_latency_stats_write); read_attribute(congested); read_attribute(bucket_quantiles_last_read); read_attribute(bucket_quantiles_last_write); read_attribute(bucket_quantiles_fragmentation); read_attribute(bucket_quantiles_oldest_gen); read_attribute(reserve_stats); read_attribute(btree_cache_size); read_attribute(compression_stats); read_attribute(journal_debug); read_attribute(journal_pins); read_attribute(btree_updates); read_attribute(dirty_btree_nodes); read_attribute(btree_transactions); read_attribute(internal_uuid); read_attribute(has_data); read_attribute(alloc_debug); write_attribute(wake_allocator); read_attribute(read_realloc_races); read_attribute(extent_migrate_done); read_attribute(extent_migrate_raced); rw_attribute(journal_write_delay_ms); rw_attribute(journal_reclaim_delay_ms); rw_attribute(discard); rw_attribute(cache_replacement_policy); rw_attribute(label); rw_attribute(copy_gc_enabled); sysfs_pd_controller_attribute(copy_gc); rw_attribute(rebalance_enabled); sysfs_pd_controller_attribute(rebalance); read_attribute(rebalance_work); rw_attribute(promote_whole_extents); read_attribute(new_stripes); rw_attribute(pd_controllers_update_seconds); read_attribute(meta_replicas_have); read_attribute(data_replicas_have); read_attribute(io_timers_read); read_attribute(io_timers_write); #ifdef CONFIG_BCACHEFS_TESTS write_attribute(perf_test); #endif /* CONFIG_BCACHEFS_TESTS */ #define BCH_DEBUG_PARAM(name, description) \ rw_attribute(name); BCH_DEBUG_PARAMS() #undef BCH_DEBUG_PARAM #define x(_name) \ static struct attribute sysfs_time_stat_##_name = \ { .name = #_name, .mode = S_IRUGO }; BCH_TIME_STATS() #undef x static struct attribute sysfs_state_rw = { .name = "state", .mode = S_IRUGO }; static size_t bch2_btree_cache_size(struct bch_fs *c) { size_t ret = 0; struct btree *b; mutex_lock(&c->btree_cache.lock); list_for_each_entry(b, &c->btree_cache.live, list) ret += btree_bytes(c); mutex_unlock(&c->btree_cache.lock); return ret; } static ssize_t show_fs_alloc_debug(struct bch_fs *c, char *buf) { struct printbuf out = _PBUF(buf, PAGE_SIZE); struct bch_fs_usage *fs_usage = bch2_fs_usage_read(c); if (!fs_usage) return -ENOMEM; bch2_fs_usage_to_text(&out, c, fs_usage); percpu_up_read(&c->mark_lock); kfree(fs_usage); return out.pos - buf; } static ssize_t bch2_compression_stats(struct bch_fs *c, char *buf) { struct btree_trans trans; struct btree_iter *iter; struct bkey_s_c k; u64 nr_uncompressed_extents = 0, uncompressed_sectors = 0, nr_compressed_extents = 0, compressed_sectors_compressed = 0, compressed_sectors_uncompressed = 0; int ret; if (!test_bit(BCH_FS_STARTED, &c->flags)) return -EPERM; bch2_trans_init(&trans, c, 0, 0); for_each_btree_key(&trans, iter, BTREE_ID_EXTENTS, POS_MIN, 0, k, ret) if (k.k->type == KEY_TYPE_extent) { struct bkey_s_c_extent e = bkey_s_c_to_extent(k); const union bch_extent_entry *entry; struct extent_ptr_decoded p; extent_for_each_ptr_decode(e, p, entry) { if (!crc_is_compressed(p.crc)) { nr_uncompressed_extents++; uncompressed_sectors += e.k->size; } else { nr_compressed_extents++; compressed_sectors_compressed += p.crc.compressed_size; compressed_sectors_uncompressed += p.crc.uncompressed_size; } /* only looking at the first ptr */ break; } } ret = bch2_trans_exit(&trans) ?: ret; if (ret) return ret; return scnprintf(buf, PAGE_SIZE, "uncompressed data:\n" " nr extents: %llu\n" " size (bytes): %llu\n" "compressed data:\n" " nr extents: %llu\n" " compressed size (bytes): %llu\n" " uncompressed size (bytes): %llu\n", nr_uncompressed_extents, uncompressed_sectors << 9, nr_compressed_extents, compressed_sectors_compressed << 9, compressed_sectors_uncompressed << 9); } static ssize_t bch2_new_stripes(struct bch_fs *c, char *buf) { char *out = buf, *end = buf + PAGE_SIZE; struct ec_stripe_head *h; struct ec_stripe_new *s; mutex_lock(&c->ec_new_stripe_lock); list_for_each_entry(h, &c->ec_new_stripe_list, list) { out += scnprintf(out, end - out, "target %u algo %u redundancy %u:\n", h->target, h->algo, h->redundancy); if (h->s) out += scnprintf(out, end - out, "\tpending: blocks %u allocated %u\n", h->s->blocks.nr, bitmap_weight(h->s->blocks_allocated, h->s->blocks.nr)); mutex_lock(&h->lock); list_for_each_entry(s, &h->stripes, list) out += scnprintf(out, end - out, "\tin flight: blocks %u allocated %u pin %u\n", s->blocks.nr, bitmap_weight(s->blocks_allocated, s->blocks.nr), atomic_read(&s->pin)); mutex_unlock(&h->lock); } mutex_unlock(&c->ec_new_stripe_lock); return out - buf; } SHOW(bch2_fs) { struct bch_fs *c = container_of(kobj, struct bch_fs, kobj); sysfs_print(minor, c->minor); sysfs_printf(internal_uuid, "%pU", c->sb.uuid.b); sysfs_print(journal_write_delay_ms, c->journal.write_delay_ms); sysfs_print(journal_reclaim_delay_ms, c->journal.reclaim_delay_ms); sysfs_print(block_size, block_bytes(c)); sysfs_print(btree_node_size, btree_bytes(c)); sysfs_hprint(btree_cache_size, bch2_btree_cache_size(c)); sysfs_print(read_realloc_races, atomic_long_read(&c->read_realloc_races)); sysfs_print(extent_migrate_done, atomic_long_read(&c->extent_migrate_done)); sysfs_print(extent_migrate_raced, atomic_long_read(&c->extent_migrate_raced)); sysfs_printf(btree_gc_periodic, "%u", (int) c->btree_gc_periodic); sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled); sysfs_print(pd_controllers_update_seconds, c->pd_controllers_update_seconds); sysfs_printf(rebalance_enabled, "%i", c->rebalance.enabled); sysfs_pd_controller_show(rebalance, &c->rebalance.pd); /* XXX */ if (attr == &sysfs_rebalance_work) return bch2_rebalance_work_show(c, buf); sysfs_print(promote_whole_extents, c->promote_whole_extents); sysfs_printf(meta_replicas_have, "%i", bch2_replicas_online(c, true)); sysfs_printf(data_replicas_have, "%i", bch2_replicas_online(c, false)); /* Debugging: */ if (attr == &sysfs_alloc_debug) return show_fs_alloc_debug(c, buf); if (attr == &sysfs_journal_debug) return bch2_journal_print_debug(&c->journal, buf); if (attr == &sysfs_journal_pins) return bch2_journal_print_pins(&c->journal, buf); if (attr == &sysfs_btree_updates) return bch2_btree_updates_print(c, buf); if (attr == &sysfs_dirty_btree_nodes) return bch2_dirty_btree_nodes_print(c, buf); if (attr == &sysfs_btree_transactions) { struct printbuf out = _PBUF(buf, PAGE_SIZE); bch2_btree_trans_to_text(&out, c); return out.pos - buf; } if (attr == &sysfs_compression_stats) return bch2_compression_stats(c, buf); if (attr == &sysfs_new_stripes) return bch2_new_stripes(c, buf); if (attr == &sysfs_io_timers_read) return bch2_io_timers_show(&c->io_clock[READ], buf); if (attr == &sysfs_io_timers_write) return bch2_io_timers_show(&c->io_clock[WRITE], buf); #define BCH_DEBUG_PARAM(name, description) sysfs_print(name, c->name); BCH_DEBUG_PARAMS() #undef BCH_DEBUG_PARAM return 0; } STORE(bch2_fs) { struct bch_fs *c = container_of(kobj, struct bch_fs, kobj); sysfs_strtoul(journal_write_delay_ms, c->journal.write_delay_ms); sysfs_strtoul(journal_reclaim_delay_ms, c->journal.reclaim_delay_ms); if (attr == &sysfs_btree_gc_periodic) { ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic) ?: (ssize_t) size; wake_up_process(c->gc_thread); return ret; } if (attr == &sysfs_copy_gc_enabled) { struct bch_dev *ca; unsigned i; ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled) ?: (ssize_t) size; for_each_member_device(ca, c, i) if (ca->copygc_thread) wake_up_process(ca->copygc_thread); return ret; } if (attr == &sysfs_rebalance_enabled) { ssize_t ret = strtoul_safe(buf, c->rebalance.enabled) ?: (ssize_t) size; rebalance_wakeup(c); return ret; } sysfs_strtoul(pd_controllers_update_seconds, c->pd_controllers_update_seconds); sysfs_pd_controller_store(rebalance, &c->rebalance.pd); sysfs_strtoul(promote_whole_extents, c->promote_whole_extents); /* Debugging: */ #define BCH_DEBUG_PARAM(name, description) sysfs_strtoul(name, c->name); BCH_DEBUG_PARAMS() #undef BCH_DEBUG_PARAM if (!test_bit(BCH_FS_STARTED, &c->flags)) return -EPERM; /* Debugging: */ if (attr == &sysfs_trigger_journal_flush) bch2_journal_meta_async(&c->journal, NULL); if (attr == &sysfs_trigger_btree_coalesce) bch2_coalesce(c); if (attr == &sysfs_trigger_gc) { /* * Full gc is currently incompatible with btree key cache: */ #if 0 down_read(&c->state_lock); bch2_gc(c, NULL, false, false); up_read(&c->state_lock); #else bch2_gc_gens(c); #endif } if (attr == &sysfs_trigger_alloc_write) { bool wrote; bch2_alloc_write(c, 0, &wrote); } if (attr == &sysfs_prune_cache) { struct shrink_control sc; sc.gfp_mask = GFP_KERNEL; sc.nr_to_scan = strtoul_or_return(buf); c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc); } #ifdef CONFIG_BCACHEFS_TESTS if (attr == &sysfs_perf_test) { char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp; char *test = strsep(&p, " \t\n"); char *nr_str = strsep(&p, " \t\n"); char *threads_str = strsep(&p, " \t\n"); unsigned threads; u64 nr; int ret = -EINVAL; if (threads_str && !(ret = kstrtouint(threads_str, 10, &threads)) && !(ret = bch2_strtoull_h(nr_str, &nr))) bch2_btree_perf_test(c, test, nr, threads); else size = ret; kfree(tmp); } #endif return size; } SYSFS_OPS(bch2_fs); struct attribute *bch2_fs_files[] = { &sysfs_minor, &sysfs_block_size, &sysfs_btree_node_size, &sysfs_btree_cache_size, &sysfs_meta_replicas_have, &sysfs_data_replicas_have, &sysfs_journal_write_delay_ms, &sysfs_journal_reclaim_delay_ms, &sysfs_promote_whole_extents, &sysfs_compression_stats, #ifdef CONFIG_BCACHEFS_TESTS &sysfs_perf_test, #endif NULL }; /* internal dir - just a wrapper */ SHOW(bch2_fs_internal) { struct bch_fs *c = container_of(kobj, struct bch_fs, internal); return bch2_fs_show(&c->kobj, attr, buf); } STORE(bch2_fs_internal) { struct bch_fs *c = container_of(kobj, struct bch_fs, internal); return bch2_fs_store(&c->kobj, attr, buf, size); } SYSFS_OPS(bch2_fs_internal); struct attribute *bch2_fs_internal_files[] = { &sysfs_alloc_debug, &sysfs_journal_debug, &sysfs_journal_pins, &sysfs_btree_updates, &sysfs_dirty_btree_nodes, &sysfs_btree_transactions, &sysfs_read_realloc_races, &sysfs_extent_migrate_done, &sysfs_extent_migrate_raced, &sysfs_trigger_journal_flush, &sysfs_trigger_btree_coalesce, &sysfs_trigger_gc, &sysfs_trigger_alloc_write, &sysfs_prune_cache, &sysfs_copy_gc_enabled, &sysfs_rebalance_enabled, &sysfs_rebalance_work, sysfs_pd_controller_files(rebalance), &sysfs_new_stripes, &sysfs_io_timers_read, &sysfs_io_timers_write, &sysfs_internal_uuid, #define BCH_DEBUG_PARAM(name, description) &sysfs_##name, BCH_DEBUG_PARAMS() #undef BCH_DEBUG_PARAM NULL }; /* options */ SHOW(bch2_fs_opts_dir) { struct printbuf out = _PBUF(buf, PAGE_SIZE); struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir); const struct bch_option *opt = container_of(attr, struct bch_option, attr); int id = opt - bch2_opt_table; u64 v = bch2_opt_get_by_id(&c->opts, id); bch2_opt_to_text(&out, c, opt, v, OPT_SHOW_FULL_LIST); pr_buf(&out, "\n"); return out.pos - buf; } STORE(bch2_fs_opts_dir) { struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir); const struct bch_option *opt = container_of(attr, struct bch_option, attr); int ret, id = opt - bch2_opt_table; char *tmp; u64 v; tmp = kstrdup(buf, GFP_KERNEL); if (!tmp) return -ENOMEM; ret = bch2_opt_parse(c, opt, strim(tmp), &v); kfree(tmp); if (ret < 0) return ret; ret = bch2_opt_check_may_set(c, id, v); if (ret < 0) return ret; if (opt->set_sb != SET_NO_SB_OPT) { mutex_lock(&c->sb_lock); opt->set_sb(c->disk_sb.sb, v); bch2_write_super(c); mutex_unlock(&c->sb_lock); } bch2_opt_set_by_id(&c->opts, id, v); if ((id == Opt_background_target || id == Opt_background_compression) && v) { bch2_rebalance_add_work(c, S64_MAX); rebalance_wakeup(c); } return size; } SYSFS_OPS(bch2_fs_opts_dir); struct attribute *bch2_fs_opts_dir_files[] = { NULL }; int bch2_opts_create_sysfs_files(struct kobject *kobj) { const struct bch_option *i; int ret; for (i = bch2_opt_table; i < bch2_opt_table + bch2_opts_nr; i++) { if (!(i->mode & (OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME))) continue; ret = sysfs_create_file(kobj, &i->attr); if (ret) return ret; } return 0; } /* time stats */ SHOW(bch2_fs_time_stats) { struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats); #define x(name) \ if (attr == &sysfs_time_stat_##name) \ return bch2_time_stats_print(&c->times[BCH_TIME_##name],\ buf, PAGE_SIZE); BCH_TIME_STATS() #undef x return 0; } STORE(bch2_fs_time_stats) { return size; } SYSFS_OPS(bch2_fs_time_stats); struct attribute *bch2_fs_time_stats_files[] = { #define x(name) \ &sysfs_time_stat_##name, BCH_TIME_STATS() #undef x NULL }; typedef unsigned (bucket_map_fn)(struct bch_fs *, struct bch_dev *, size_t, void *); static unsigned bucket_last_io_fn(struct bch_fs *c, struct bch_dev *ca, size_t b, void *private) { int rw = (private ? 1 : 0); return bucket_last_io(c, bucket(ca, b), rw); } static unsigned bucket_sectors_used_fn(struct bch_fs *c, struct bch_dev *ca, size_t b, void *private) { struct bucket *g = bucket(ca, b); return bucket_sectors_used(g->mark); } static unsigned bucket_oldest_gen_fn(struct bch_fs *c, struct bch_dev *ca, size_t b, void *private) { return bucket_gc_gen(ca, b); } static int unsigned_cmp(const void *_l, const void *_r) { const unsigned *l = _l; const unsigned *r = _r; return cmp_int(*l, *r); } static ssize_t show_quantiles(struct bch_fs *c, struct bch_dev *ca, char *buf, bucket_map_fn *fn, void *private) { size_t i, n; /* Compute 31 quantiles */ unsigned q[31], *p; ssize_t ret = 0; down_read(&ca->bucket_lock); n = ca->mi.nbuckets; p = vzalloc(n * sizeof(unsigned)); if (!p) { up_read(&ca->bucket_lock); return -ENOMEM; } for (i = ca->mi.first_bucket; i < n; i++) p[i] = fn(c, ca, i, private); sort(p, n, sizeof(unsigned), unsigned_cmp, NULL); up_read(&ca->bucket_lock); while (n && !p[n - 1]) --n; for (i = 0; i < ARRAY_SIZE(q); i++) q[i] = p[n * (i + 1) / (ARRAY_SIZE(q) + 1)]; vfree(p); for (i = 0; i < ARRAY_SIZE(q); i++) ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%u ", q[i]); buf[ret - 1] = '\n'; return ret; } static ssize_t show_reserve_stats(struct bch_dev *ca, char *buf) { struct printbuf out = _PBUF(buf, PAGE_SIZE); enum alloc_reserve i; spin_lock(&ca->fs->freelist_lock); pr_buf(&out, "free_inc:\t%zu\t%zu\n", fifo_used(&ca->free_inc), ca->free_inc.size); for (i = 0; i < RESERVE_NR; i++) pr_buf(&out, "free[%u]:\t%zu\t%zu\n", i, fifo_used(&ca->free[i]), ca->free[i].size); spin_unlock(&ca->fs->freelist_lock); return out.pos - buf; } static ssize_t show_dev_alloc_debug(struct bch_dev *ca, char *buf) { struct bch_fs *c = ca->fs; struct bch_dev_usage stats = bch2_dev_usage_read(c, ca); unsigned i, nr[BCH_DATA_NR]; memset(nr, 0, sizeof(nr)); for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++) nr[c->open_buckets[i].type]++; return scnprintf(buf, PAGE_SIZE, "free_inc: %zu/%zu\n" "free[RESERVE_BTREE]: %zu/%zu\n" "free[RESERVE_MOVINGGC]: %zu/%zu\n" "free[RESERVE_NONE]: %zu/%zu\n" "buckets:\n" " capacity: %llu\n" " alloc: %llu\n" " sb: %llu\n" " journal: %llu\n" " meta: %llu\n" " user: %llu\n" " cached: %llu\n" " erasure coded: %llu\n" " available: %lli\n" "sectors:\n" " sb: %llu\n" " journal: %llu\n" " meta: %llu\n" " user: %llu\n" " cached: %llu\n" " fragmented: %llu\n" " copygc threshold: %llu\n" "freelist_wait: %s\n" "open buckets: %u/%u (reserved %u)\n" "open_buckets_wait: %s\n" "open_buckets_btree: %u\n" "open_buckets_user: %u\n" "btree reserve cache: %u\n", fifo_used(&ca->free_inc), ca->free_inc.size, fifo_used(&ca->free[RESERVE_BTREE]), ca->free[RESERVE_BTREE].size, fifo_used(&ca->free[RESERVE_MOVINGGC]), ca->free[RESERVE_MOVINGGC].size, fifo_used(&ca->free[RESERVE_NONE]), ca->free[RESERVE_NONE].size, ca->mi.nbuckets - ca->mi.first_bucket, stats.buckets_alloc, stats.buckets[BCH_DATA_SB], stats.buckets[BCH_DATA_JOURNAL], stats.buckets[BCH_DATA_BTREE], stats.buckets[BCH_DATA_USER], stats.buckets[BCH_DATA_CACHED], stats.buckets_ec, ca->mi.nbuckets - ca->mi.first_bucket - stats.buckets_unavailable, stats.sectors[BCH_DATA_SB], stats.sectors[BCH_DATA_JOURNAL], stats.sectors[BCH_DATA_BTREE], stats.sectors[BCH_DATA_USER], stats.sectors[BCH_DATA_CACHED], stats.sectors_fragmented, ca->copygc_threshold, c->freelist_wait.list.first ? "waiting" : "empty", c->open_buckets_nr_free, OPEN_BUCKETS_COUNT, BTREE_NODE_OPEN_BUCKET_RESERVE, c->open_buckets_wait.list.first ? "waiting" : "empty", nr[BCH_DATA_BTREE], nr[BCH_DATA_USER], c->btree_reserve_cache_nr); } static const char * const bch2_rw[] = { "read", "write", NULL }; static ssize_t show_dev_iodone(struct bch_dev *ca, char *buf) { struct printbuf out = _PBUF(buf, PAGE_SIZE); int rw, i; for (rw = 0; rw < 2; rw++) { pr_buf(&out, "%s:\n", bch2_rw[rw]); for (i = 1; i < BCH_DATA_NR; i++) pr_buf(&out, "%-12s:%12llu\n", bch2_data_types[i], percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9); } return out.pos - buf; } SHOW(bch2_dev) { struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj); struct bch_fs *c = ca->fs; struct printbuf out = _PBUF(buf, PAGE_SIZE); sysfs_printf(uuid, "%pU\n", ca->uuid.b); sysfs_print(bucket_size, bucket_bytes(ca)); sysfs_print(block_size, block_bytes(c)); sysfs_print(first_bucket, ca->mi.first_bucket); sysfs_print(nbuckets, ca->mi.nbuckets); sysfs_print(durability, ca->mi.durability); sysfs_print(discard, ca->mi.discard); if (attr == &sysfs_label) { if (ca->mi.group) { mutex_lock(&c->sb_lock); bch2_disk_path_to_text(&out, &c->disk_sb, ca->mi.group - 1); mutex_unlock(&c->sb_lock); } pr_buf(&out, "\n"); return out.pos - buf; } if (attr == &sysfs_has_data) { bch2_flags_to_text(&out, bch2_data_types, bch2_dev_has_data(c, ca)); pr_buf(&out, "\n"); return out.pos - buf; } sysfs_pd_controller_show(copy_gc, &ca->copygc_pd); if (attr == &sysfs_cache_replacement_policy) { bch2_string_opt_to_text(&out, bch2_cache_replacement_policies, ca->mi.replacement); pr_buf(&out, "\n"); return out.pos - buf; } if (attr == &sysfs_state_rw) { bch2_string_opt_to_text(&out, bch2_dev_state, ca->mi.state); pr_buf(&out, "\n"); return out.pos - buf; } if (attr == &sysfs_iodone) return show_dev_iodone(ca, buf); sysfs_print(io_latency_read, atomic64_read(&ca->cur_latency[READ])); sysfs_print(io_latency_write, atomic64_read(&ca->cur_latency[WRITE])); if (attr == &sysfs_io_latency_stats_read) return bch2_time_stats_print(&ca->io_latency[READ], buf, PAGE_SIZE); if (attr == &sysfs_io_latency_stats_write) return bch2_time_stats_print(&ca->io_latency[WRITE], buf, PAGE_SIZE); sysfs_printf(congested, "%u%%", clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX) * 100 / CONGESTED_MAX); if (attr == &sysfs_bucket_quantiles_last_read) return show_quantiles(c, ca, buf, bucket_last_io_fn, (void *) 0); if (attr == &sysfs_bucket_quantiles_last_write) return show_quantiles(c, ca, buf, bucket_last_io_fn, (void *) 1); if (attr == &sysfs_bucket_quantiles_fragmentation) return show_quantiles(c, ca, buf, bucket_sectors_used_fn, NULL); if (attr == &sysfs_bucket_quantiles_oldest_gen) return show_quantiles(c, ca, buf, bucket_oldest_gen_fn, NULL); if (attr == &sysfs_reserve_stats) return show_reserve_stats(ca, buf); if (attr == &sysfs_alloc_debug) return show_dev_alloc_debug(ca, buf); return 0; } STORE(bch2_dev) { struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj); struct bch_fs *c = ca->fs; struct bch_member *mi; sysfs_pd_controller_store(copy_gc, &ca->copygc_pd); if (attr == &sysfs_discard) { bool v = strtoul_or_return(buf); mutex_lock(&c->sb_lock); mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx]; if (v != BCH_MEMBER_DISCARD(mi)) { SET_BCH_MEMBER_DISCARD(mi, v); bch2_write_super(c); } mutex_unlock(&c->sb_lock); } if (attr == &sysfs_cache_replacement_policy) { ssize_t v = __sysfs_match_string(bch2_cache_replacement_policies, -1, buf); if (v < 0) return v; mutex_lock(&c->sb_lock); mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx]; if ((unsigned) v != BCH_MEMBER_REPLACEMENT(mi)) { SET_BCH_MEMBER_REPLACEMENT(mi, v); bch2_write_super(c); } mutex_unlock(&c->sb_lock); } if (attr == &sysfs_label) { char *tmp; int ret; tmp = kstrdup(buf, GFP_KERNEL); if (!tmp) return -ENOMEM; ret = bch2_dev_group_set(c, ca, strim(tmp)); kfree(tmp); if (ret) return ret; } if (attr == &sysfs_wake_allocator) bch2_wake_allocator(ca); return size; } SYSFS_OPS(bch2_dev); struct attribute *bch2_dev_files[] = { &sysfs_uuid, &sysfs_bucket_size, &sysfs_block_size, &sysfs_first_bucket, &sysfs_nbuckets, &sysfs_durability, /* settings: */ &sysfs_discard, &sysfs_cache_replacement_policy, &sysfs_state_rw, &sysfs_label, &sysfs_has_data, &sysfs_iodone, &sysfs_io_latency_read, &sysfs_io_latency_write, &sysfs_io_latency_stats_read, &sysfs_io_latency_stats_write, &sysfs_congested, /* alloc info - other stats: */ &sysfs_bucket_quantiles_last_read, &sysfs_bucket_quantiles_last_write, &sysfs_bucket_quantiles_fragmentation, &sysfs_bucket_quantiles_oldest_gen, &sysfs_reserve_stats, /* debug: */ &sysfs_alloc_debug, &sysfs_wake_allocator, sysfs_pd_controller_files(copy_gc), NULL }; #endif /* _BCACHEFS_SYSFS_H_ */