git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * bcache sysfs interfaces
   4  *
   5  * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com>
   6  * Copyright 2012 Google, Inc.
   7  */
   8
   9 #ifndef NO_BCACHEFS_SYSFS
  10
  11 #include "bcachefs.h"
  12 #include "alloc_background.h"
  13 #include "alloc_foreground.h"
  14 #include "sysfs.h"
  15 #include "btree_cache.h"
  16 #include "btree_io.h"
  17 #include "btree_iter.h"
  18 #include "btree_key_cache.h"
  19 #include "btree_update.h"
  20 #include "btree_update_interior.h"
  21 #include "btree_gc.h"
  22 #include "buckets.h"
  23 #include "clock.h"
  24 #include "disk_groups.h"
  25 #include "ec.h"
  26 #include "inode.h"
  27 #include "journal.h"
  28 #include "keylist.h"
  29 #include "move.h"
  30 #include "opts.h"
  31 #include "rebalance.h"
  32 #include "replicas.h"
  33 #include "super-io.h"
  34 #include "tests.h"
  35
  36 #include <linux/blkdev.h>
  37 #include <linux/sort.h>
  38 #include <linux/sched/clock.h>
  39
  40 #include "util.h"
  41
  42 #define SYSFS_OPS(type)                                                 \
  43 struct sysfs_ops type ## _sysfs_ops = {                                 \
  44         .show   = type ## _show,                                        \
  45         .store  = type ## _store                                        \
  46 }
  47
  48 #define SHOW(fn)                                                        \
  49 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  50                            char *buf)                                   \
  51
  52 #define STORE(fn)                                                       \
  53 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  54                             const char *buf, size_t size)               \
  55
  56 #define __sysfs_attribute(_name, _mode)                                 \
  57         static struct attribute sysfs_##_name =                         \
  58                 { .name = #_name, .mode = _mode }
  59
  60 #define write_attribute(n)      __sysfs_attribute(n, S_IWUSR)
  61 #define read_attribute(n)       __sysfs_attribute(n, S_IRUGO)
  62 #define rw_attribute(n)         __sysfs_attribute(n, S_IRUGO|S_IWUSR)
  63
  64 #define sysfs_printf(file, fmt, ...)                                    \
  65 do {                                                                    \
  66         if (attr == &sysfs_ ## file)                                    \
  67                 return scnprintf(buf, PAGE_SIZE, fmt "\n", __VA_ARGS__);\
  68 } while (0)
  69
  70 #define sysfs_print(file, var)                                          \
  71 do {                                                                    \
  72         if (attr == &sysfs_ ## file)                                    \
  73                 return snprint(buf, PAGE_SIZE, var);                    \
  74 } while (0)
  75
  76 #define sysfs_hprint(file, val)                                         \
  77 do {                                                                    \
  78         if (attr == &sysfs_ ## file) {                                  \
  79                 bch2_hprint(&out, val);                                 \
  80                 pr_buf(&out, "\n");                                     \
  81                 return out.pos - buf;                                   \
  82         }                                                               \
  83 } while (0)
  84
  85 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
  86 #define var_print(_var)         sysfs_print(_var, var(_var))
  87 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
  88
  89 #define sysfs_strtoul(file, var)                                        \
  90 do {                                                                    \
  91         if (attr == &sysfs_ ## file)                                    \
  92                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
  93 } while (0)
  94
  95 #define sysfs_strtoul_clamp(file, var, min, max)                        \
  96 do {                                                                    \
  97         if (attr == &sysfs_ ## file)                                    \
  98                 return strtoul_safe_clamp(buf, var, min, max)           \
  99                         ?: (ssize_t) size;                              \
 100 } while (0)
 101
 102 #define strtoul_or_return(cp)                                           \
 103 ({                                                                      \
 104         unsigned long _v;                                               \
 105         int _r = kstrtoul(cp, 10, &_v);                                 \
 106         if (_r)                                                         \
 107                 return _r;                                              \
 108         _v;                                                             \
 109 })
 110
 111 #define strtoul_restrict_or_return(cp, min, max)                        \
 112 ({                                                                      \
 113         unsigned long __v = 0;                                          \
 114         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 115         if (_r)                                                         \
 116                 return _r;                                              \
 117         __v;                                                            \
 118 })
 119
 120 #define strtoi_h_or_return(cp)                                          \
 121 ({                                                                      \
 122         u64 _v;                                                         \
 123         int _r = strtoi_h(cp, &_v);                                     \
 124         if (_r)                                                         \
 125                 return _r;                                              \
 126         _v;                                                             \
 127 })
 128
 129 #define sysfs_hatoi(file, var)                                          \
 130 do {                                                                    \
 131         if (attr == &sysfs_ ## file)                                    \
 132                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 133 } while (0)
 134
 135 write_attribute(trigger_gc);
 136 write_attribute(prune_cache);
 137 rw_attribute(btree_gc_periodic);
 138 rw_attribute(gc_gens_pos);
 139
 140 read_attribute(uuid);
 141 read_attribute(minor);
 142 read_attribute(bucket_size);
 143 read_attribute(first_bucket);
 144 read_attribute(nbuckets);
 145 read_attribute(durability);
 146 read_attribute(iodone);
 147
 148 read_attribute(io_latency_read);
 149 read_attribute(io_latency_write);
 150 read_attribute(io_latency_stats_read);
 151 read_attribute(io_latency_stats_write);
 152 read_attribute(congested);
 153
 154 read_attribute(btree_avg_write_size);
 155
 156 read_attribute(reserve_stats);
 157 read_attribute(btree_cache_size);
 158 read_attribute(compression_stats);
 159 read_attribute(journal_debug);
 160 read_attribute(journal_pins);
 161 read_attribute(btree_updates);
 162 read_attribute(dirty_btree_nodes);
 163 read_attribute(btree_cache);
 164 read_attribute(btree_key_cache);
 165 read_attribute(btree_transactions);
 166 read_attribute(stripes_heap);
 167 read_attribute(open_buckets);
 168
 169 read_attribute(internal_uuid);
 170
 171 read_attribute(has_data);
 172 read_attribute(alloc_debug);
 173 write_attribute(wake_allocator);
 174
 175 read_attribute(read_realloc_races);
 176 read_attribute(extent_migrate_done);
 177 read_attribute(extent_migrate_raced);
 178
 179 rw_attribute(discard);
 180 rw_attribute(label);
 181
 182 rw_attribute(copy_gc_enabled);
 183 read_attribute(copy_gc_wait);
 184
 185 rw_attribute(rebalance_enabled);
 186 sysfs_pd_controller_attribute(rebalance);
 187 read_attribute(rebalance_work);
 188 rw_attribute(promote_whole_extents);
 189
 190 read_attribute(new_stripes);
 191
 192 read_attribute(io_timers_read);
 193 read_attribute(io_timers_write);
 194
 195 read_attribute(data_jobs);
 196
 197 #ifdef CONFIG_BCACHEFS_TESTS
 198 write_attribute(perf_test);
 199 #endif /* CONFIG_BCACHEFS_TESTS */
 200
 201 #define x(_name)                                                \
 202         static struct attribute sysfs_time_stat_##_name =               \
 203                 { .name = #_name, .mode = S_IRUGO };
 204         BCH_TIME_STATS()
 205 #undef x
 206
 207 static struct attribute sysfs_state_rw = {
 208         .name = "state",
 209         .mode = S_IRUGO
 210 };
 211
 212 static size_t bch2_btree_cache_size(struct bch_fs *c)
 213 {
 214         size_t ret = 0;
 215         struct btree *b;
 216
 217         mutex_lock(&c->btree_cache.lock);
 218         list_for_each_entry(b, &c->btree_cache.live, list)
 219                 ret += btree_bytes(c);
 220
 221         mutex_unlock(&c->btree_cache.lock);
 222         return ret;
 223 }
 224
 225 static size_t bch2_btree_avg_write_size(struct bch_fs *c)
 226 {
 227         u64 nr = atomic64_read(&c->btree_writes_nr);
 228         u64 sectors = atomic64_read(&c->btree_writes_sectors);
 229
 230         return nr ? div64_u64(sectors, nr) : 0;
 231 }
 232
 233 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 234 {
 235         long ret = 0;
 236         struct bch_move_stats *stats;
 237
 238         mutex_lock(&c->data_progress_lock);
 239         list_for_each_entry(stats, &c->data_progress_list, list) {
 240                 pr_buf(out, "%s: data type %s btree_id %s position: ",
 241                        stats->name,
 242                        bch2_data_types[stats->data_type],
 243                        bch2_btree_ids[stats->btree_id]);
 244                 bch2_bpos_to_text(out, stats->pos);
 245                 pr_buf(out, "%s", "\n");
 246         }
 247
 248         mutex_unlock(&c->data_progress_lock);
 249         return ret;
 250 }
 251
 252 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 253 {
 254         struct btree_trans trans;
 255         struct btree_iter iter;
 256         struct bkey_s_c k;
 257         enum btree_id id;
 258         u64 nr_uncompressed_extents = 0,
 259             nr_compressed_extents = 0,
 260             nr_incompressible_extents = 0,
 261             uncompressed_sectors = 0,
 262             incompressible_sectors = 0,
 263             compressed_sectors_compressed = 0,
 264             compressed_sectors_uncompressed = 0;
 265         int ret;
 266
 267         if (!test_bit(BCH_FS_STARTED, &c->flags))
 268                 return -EPERM;
 269
 270         bch2_trans_init(&trans, c, 0, 0);
 271
 272         for (id = 0; id < BTREE_ID_NR; id++) {
 273                 if (!((1U << id) & BTREE_ID_HAS_PTRS))
 274                         continue;
 275
 276                 for_each_btree_key(&trans, iter, id, POS_MIN,
 277                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 278                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 279                         const union bch_extent_entry *entry;
 280                         struct extent_ptr_decoded p;
 281                         bool compressed = false, uncompressed = false, incompressible = false;
 282
 283                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 284                                 switch (p.crc.compression_type) {
 285                                 case BCH_COMPRESSION_TYPE_none:
 286                                         uncompressed = true;
 287                                         uncompressed_sectors += k.k->size;
 288                                         break;
 289                                 case BCH_COMPRESSION_TYPE_incompressible:
 290                                         incompressible = true;
 291                                         incompressible_sectors += k.k->size;
 292                                         break;
 293                                 default:
 294                                         compressed_sectors_compressed +=
 295                                                 p.crc.compressed_size;
 296                                         compressed_sectors_uncompressed +=
 297                                                 p.crc.uncompressed_size;
 298                                         compressed = true;
 299                                         break;
 300                                 }
 301                         }
 302
 303                         if (incompressible)
 304                                 nr_incompressible_extents++;
 305                         else if (uncompressed)
 306                                 nr_uncompressed_extents++;
 307                         else if (compressed)
 308                                 nr_compressed_extents++;
 309                 }
 310                 bch2_trans_iter_exit(&trans, &iter);
 311         }
 312
 313         bch2_trans_exit(&trans);
 314
 315         if (ret)
 316                 return ret;
 317
 318         pr_buf(out, "uncompressed:\n");
 319         pr_buf(out, "   nr extents:             %llu\n", nr_uncompressed_extents);
 320         pr_buf(out, "   size:                   ");
 321         bch2_hprint(out, uncompressed_sectors << 9);
 322         pr_buf(out, "\n");
 323
 324         pr_buf(out, "compressed:\n");
 325         pr_buf(out, "   nr extents:             %llu\n", nr_compressed_extents);
 326         pr_buf(out, "   compressed size:        ");
 327         bch2_hprint(out, compressed_sectors_compressed << 9);
 328         pr_buf(out, "\n");
 329         pr_buf(out, "   uncompressed size:      ");
 330         bch2_hprint(out, compressed_sectors_uncompressed << 9);
 331         pr_buf(out, "\n");
 332
 333         pr_buf(out, "incompressible:\n");
 334         pr_buf(out, "   nr extents:             %llu\n", nr_incompressible_extents);
 335         pr_buf(out, "   size:                   ");
 336         bch2_hprint(out, incompressible_sectors << 9);
 337         pr_buf(out, "\n");
 338         return 0;
 339 }
 340
 341 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 342 {
 343         pr_buf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 344         bch2_bpos_to_text(out, c->gc_gens_pos);
 345         pr_buf(out, "\n");
 346 }
 347
 348 SHOW(bch2_fs)
 349 {
 350         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 351         struct printbuf out = _PBUF(buf, PAGE_SIZE);
 352
 353         sysfs_print(minor,                      c->minor);
 354         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 355
 356         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 357         sysfs_hprint(btree_avg_write_size,      bch2_btree_avg_write_size(c));
 358
 359         sysfs_print(read_realloc_races,
 360                     atomic_long_read(&c->read_realloc_races));
 361         sysfs_print(extent_migrate_done,
 362                     atomic_long_read(&c->extent_migrate_done));
 363         sysfs_print(extent_migrate_raced,
 364                     atomic_long_read(&c->extent_migrate_raced));
 365
 366         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 367
 368         if (attr == &sysfs_gc_gens_pos) {
 369                 bch2_gc_gens_pos_to_text(&out, c);
 370                 return out.pos - buf;
 371         }
 372
 373         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 374
 375         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 376         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 377         sysfs_hprint(copy_gc_wait,
 378                      max(0LL, c->copygc_wait -
 379                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 380
 381         if (attr == &sysfs_rebalance_work) {
 382                 bch2_rebalance_work_to_text(&out, c);
 383                 return out.pos - buf;
 384         }
 385
 386         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 387
 388         /* Debugging: */
 389
 390         if (attr == &sysfs_journal_debug) {
 391                 bch2_journal_debug_to_text(&out, &c->journal);
 392                 return out.pos - buf;
 393         }
 394
 395         if (attr == &sysfs_journal_pins) {
 396                 bch2_journal_pins_to_text(&out, &c->journal);
 397                 return out.pos - buf;
 398         }
 399
 400         if (attr == &sysfs_btree_updates) {
 401                 bch2_btree_updates_to_text(&out, c);
 402                 return out.pos - buf;
 403         }
 404
 405         if (attr == &sysfs_dirty_btree_nodes) {
 406                 bch2_dirty_btree_nodes_to_text(&out, c);
 407                 return out.pos - buf;
 408         }
 409
 410         if (attr == &sysfs_btree_cache) {
 411                 bch2_btree_cache_to_text(&out, c);
 412                 return out.pos - buf;
 413         }
 414
 415         if (attr == &sysfs_btree_key_cache) {
 416                 bch2_btree_key_cache_to_text(&out, &c->btree_key_cache);
 417                 return out.pos - buf;
 418         }
 419
 420         if (attr == &sysfs_btree_transactions) {
 421                 bch2_btree_trans_to_text(&out, c);
 422                 return out.pos - buf;
 423         }
 424
 425         if (attr == &sysfs_stripes_heap) {
 426                 bch2_stripes_heap_to_text(&out, c);
 427                 return out.pos - buf;
 428         }
 429
 430         if (attr == &sysfs_open_buckets) {
 431                 bch2_open_buckets_to_text(&out, c);
 432                 return out.pos - buf;
 433         }
 434
 435         if (attr == &sysfs_compression_stats) {
 436                 bch2_compression_stats_to_text(&out, c);
 437                 return out.pos - buf;
 438         }
 439
 440         if (attr == &sysfs_new_stripes) {
 441                 bch2_new_stripes_to_text(&out, c);
 442                 return out.pos - buf;
 443         }
 444
 445         if (attr == &sysfs_io_timers_read) {
 446                 bch2_io_timers_to_text(&out, &c->io_clock[READ]);
 447                 return out.pos - buf;
 448         }
 449         if (attr == &sysfs_io_timers_write) {
 450                 bch2_io_timers_to_text(&out, &c->io_clock[WRITE]);
 451                 return out.pos - buf;
 452         }
 453
 454         if (attr == &sysfs_data_jobs) {
 455                 data_progress_to_text(&out, c);
 456                 return out.pos - buf;
 457         }
 458
 459         return 0;
 460 }
 461
 462 STORE(bch2_fs)
 463 {
 464         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 465
 466         if (attr == &sysfs_btree_gc_periodic) {
 467                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 468                         ?: (ssize_t) size;
 469
 470                 wake_up_process(c->gc_thread);
 471                 return ret;
 472         }
 473
 474         if (attr == &sysfs_copy_gc_enabled) {
 475                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 476                         ?: (ssize_t) size;
 477
 478                 if (c->copygc_thread)
 479                         wake_up_process(c->copygc_thread);
 480                 return ret;
 481         }
 482
 483         if (attr == &sysfs_rebalance_enabled) {
 484                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 485                         ?: (ssize_t) size;
 486
 487                 rebalance_wakeup(c);
 488                 return ret;
 489         }
 490
 491         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 492
 493         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 494
 495         /* Debugging: */
 496
 497         if (!test_bit(BCH_FS_STARTED, &c->flags))
 498                 return -EPERM;
 499
 500         /* Debugging: */
 501
 502         if (!test_bit(BCH_FS_RW, &c->flags))
 503                 return -EROFS;
 504
 505         if (attr == &sysfs_prune_cache) {
 506                 struct shrink_control sc;
 507
 508                 sc.gfp_mask = GFP_KERNEL;
 509                 sc.nr_to_scan = strtoul_or_return(buf);
 510                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 511         }
 512
 513         if (attr == &sysfs_trigger_gc) {
 514                 /*
 515                  * Full gc is currently incompatible with btree key cache:
 516                  */
 517 #if 0
 518                 down_read(&c->state_lock);
 519                 bch2_gc(c, false, false);
 520                 up_read(&c->state_lock);
 521 #else
 522                 bch2_gc_gens(c);
 523 #endif
 524         }
 525
 526 #ifdef CONFIG_BCACHEFS_TESTS
 527         if (attr == &sysfs_perf_test) {
 528                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 529                 char *test              = strsep(&p, " \t\n");
 530                 char *nr_str            = strsep(&p, " \t\n");
 531                 char *threads_str       = strsep(&p, " \t\n");
 532                 unsigned threads;
 533                 u64 nr;
 534                 int ret = -EINVAL;
 535
 536                 if (threads_str &&
 537                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 538                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 539                         ret = bch2_btree_perf_test(c, test, nr, threads);
 540                 kfree(tmp);
 541
 542                 if (ret)
 543                         size = ret;
 544         }
 545 #endif
 546         return size;
 547 }
 548 SYSFS_OPS(bch2_fs);
 549
 550 struct attribute *bch2_fs_files[] = {
 551         &sysfs_minor,
 552         &sysfs_btree_cache_size,
 553         &sysfs_btree_avg_write_size,
 554
 555         &sysfs_promote_whole_extents,
 556
 557         &sysfs_compression_stats,
 558
 559 #ifdef CONFIG_BCACHEFS_TESTS
 560         &sysfs_perf_test,
 561 #endif
 562         NULL
 563 };
 564
 565 /* internal dir - just a wrapper */
 566
 567 SHOW(bch2_fs_internal)
 568 {
 569         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 570         return bch2_fs_show(&c->kobj, attr, buf);
 571 }
 572
 573 STORE(bch2_fs_internal)
 574 {
 575         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 576         return bch2_fs_store(&c->kobj, attr, buf, size);
 577 }
 578 SYSFS_OPS(bch2_fs_internal);
 579
 580 struct attribute *bch2_fs_internal_files[] = {
 581         &sysfs_journal_debug,
 582         &sysfs_journal_pins,
 583         &sysfs_btree_updates,
 584         &sysfs_dirty_btree_nodes,
 585         &sysfs_btree_cache,
 586         &sysfs_btree_key_cache,
 587         &sysfs_btree_transactions,
 588         &sysfs_new_stripes,
 589         &sysfs_stripes_heap,
 590         &sysfs_open_buckets,
 591         &sysfs_io_timers_read,
 592         &sysfs_io_timers_write,
 593
 594         &sysfs_trigger_gc,
 595         &sysfs_prune_cache,
 596
 597         &sysfs_read_realloc_races,
 598         &sysfs_extent_migrate_done,
 599         &sysfs_extent_migrate_raced,
 600
 601         &sysfs_gc_gens_pos,
 602
 603         &sysfs_copy_gc_enabled,
 604         &sysfs_copy_gc_wait,
 605
 606         &sysfs_rebalance_enabled,
 607         &sysfs_rebalance_work,
 608         sysfs_pd_controller_files(rebalance),
 609
 610         &sysfs_data_jobs,
 611
 612         &sysfs_internal_uuid,
 613         NULL
 614 };
 615
 616 /* options */
 617
 618 SHOW(bch2_fs_opts_dir)
 619 {
 620         struct printbuf out = _PBUF(buf, PAGE_SIZE);
 621         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 622         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 623         int id = opt - bch2_opt_table;
 624         u64 v = bch2_opt_get_by_id(&c->opts, id);
 625
 626         bch2_opt_to_text(&out, c, opt, v, OPT_SHOW_FULL_LIST);
 627         pr_buf(&out, "\n");
 628
 629         return out.pos - buf;
 630 }
 631
 632 STORE(bch2_fs_opts_dir)
 633 {
 634         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 635         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 636         int ret, id = opt - bch2_opt_table;
 637         char *tmp;
 638         u64 v;
 639
 640         tmp = kstrdup(buf, GFP_KERNEL);
 641         if (!tmp)
 642                 return -ENOMEM;
 643
 644         ret = bch2_opt_parse(c, NULL, opt, strim(tmp), &v);
 645         kfree(tmp);
 646
 647         if (ret < 0)
 648                 return ret;
 649
 650         ret = bch2_opt_check_may_set(c, id, v);
 651         if (ret < 0)
 652                 return ret;
 653
 654         bch2_opt_set_sb(c, opt, v);
 655         bch2_opt_set_by_id(&c->opts, id, v);
 656
 657         if ((id == Opt_background_target ||
 658              id == Opt_background_compression) && v) {
 659                 bch2_rebalance_add_work(c, S64_MAX);
 660                 rebalance_wakeup(c);
 661         }
 662
 663         return size;
 664 }
 665 SYSFS_OPS(bch2_fs_opts_dir);
 666
 667 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 668
 669 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 670 {
 671         const struct bch_option *i;
 672         int ret;
 673
 674         for (i = bch2_opt_table;
 675              i < bch2_opt_table + bch2_opts_nr;
 676              i++) {
 677                 if (!(i->flags & OPT_FS))
 678                         continue;
 679
 680                 ret = sysfs_create_file(kobj, &i->attr);
 681                 if (ret)
 682                         return ret;
 683         }
 684
 685         return 0;
 686 }
 687
 688 /* time stats */
 689
 690 SHOW(bch2_fs_time_stats)
 691 {
 692         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 693         struct printbuf out = _PBUF(buf, PAGE_SIZE);
 694
 695 #define x(name)                                                         \
 696         if (attr == &sysfs_time_stat_##name) {                          \
 697                 bch2_time_stats_to_text(&out, &c->times[BCH_TIME_##name]);\
 698                 return out.pos - buf;                                   \
 699         }
 700         BCH_TIME_STATS()
 701 #undef x
 702
 703         return 0;
 704 }
 705
 706 STORE(bch2_fs_time_stats)
 707 {
 708         return size;
 709 }
 710 SYSFS_OPS(bch2_fs_time_stats);
 711
 712 struct attribute *bch2_fs_time_stats_files[] = {
 713 #define x(name)                                         \
 714         &sysfs_time_stat_##name,
 715         BCH_TIME_STATS()
 716 #undef x
 717         NULL
 718 };
 719
 720 static void reserve_stats_to_text(struct printbuf *out, struct bch_dev *ca)
 721 {
 722         enum alloc_reserve i;
 723
 724         spin_lock(&ca->fs->freelist_lock);
 725
 726         pr_buf(out, "free_inc:\t%zu\t%zu\n",
 727                fifo_used(&ca->free_inc),
 728                ca->free_inc.size);
 729
 730         for (i = 0; i < RESERVE_NR; i++)
 731                 pr_buf(out, "free[%u]:\t%zu\t%zu\n", i,
 732                        fifo_used(&ca->free[i]),
 733                        ca->free[i].size);
 734
 735         spin_unlock(&ca->fs->freelist_lock);
 736 }
 737
 738 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 739 {
 740         struct bch_fs *c = ca->fs;
 741         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 742         unsigned i, nr[BCH_DATA_NR];
 743
 744         memset(nr, 0, sizeof(nr));
 745
 746         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 747                 nr[c->open_buckets[i].data_type]++;
 748
 749         pr_buf(out,
 750                "\t\t buckets\t sectors      fragmented\n"
 751                "capacity%16llu\n",
 752                ca->mi.nbuckets - ca->mi.first_bucket);
 753
 754         for (i = 1; i < BCH_DATA_NR; i++)
 755                 pr_buf(out, "%-8s%16llu%16llu%16llu\n",
 756                        bch2_data_types[i], stats.d[i].buckets,
 757                        stats.d[i].sectors, stats.d[i].fragmented);
 758
 759         pr_buf(out,
 760                "ec\t%16llu\n"
 761                "available%15llu\n"
 762                "\n"
 763                "free_inc\t\t%zu/%zu\n"
 764                "free[RESERVE_MOVINGGC]\t%zu/%zu\n"
 765                "free[RESERVE_NONE]\t%zu/%zu\n"
 766                "freelist_wait\t\t%s\n"
 767                "open buckets allocated\t%u\n"
 768                "open buckets this dev\t%u\n"
 769                "open buckets total\t%u\n"
 770                "open_buckets_wait\t%s\n"
 771                "open_buckets_btree\t%u\n"
 772                "open_buckets_user\t%u\n"
 773                "btree reserve cache\t%u\n"
 774                "thread state:\t\t%s\n",
 775                stats.buckets_ec,
 776                __dev_buckets_available(ca, stats),
 777                fifo_used(&ca->free_inc),                ca->free_inc.size,
 778                fifo_used(&ca->free[RESERVE_MOVINGGC]),  ca->free[RESERVE_MOVINGGC].size,
 779                fifo_used(&ca->free[RESERVE_NONE]),      ca->free[RESERVE_NONE].size,
 780                c->freelist_wait.list.first              ? "waiting" : "empty",
 781                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 782                ca->nr_open_buckets,
 783                OPEN_BUCKETS_COUNT,
 784                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 785                nr[BCH_DATA_btree],
 786                nr[BCH_DATA_user],
 787                c->btree_reserve_cache_nr,
 788                bch2_allocator_states[ca->allocator_state]);
 789 }
 790
 791 static const char * const bch2_rw[] = {
 792         "read",
 793         "write",
 794         NULL
 795 };
 796
 797 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 798 {
 799         int rw, i;
 800
 801         for (rw = 0; rw < 2; rw++) {
 802                 pr_buf(out, "%s:\n", bch2_rw[rw]);
 803
 804                 for (i = 1; i < BCH_DATA_NR; i++)
 805                         pr_buf(out, "%-12s:%12llu\n",
 806                                bch2_data_types[i],
 807                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 808         }
 809 }
 810
 811 SHOW(bch2_dev)
 812 {
 813         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 814         struct bch_fs *c = ca->fs;
 815         struct printbuf out = _PBUF(buf, PAGE_SIZE);
 816
 817         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 818
 819         sysfs_print(bucket_size,        bucket_bytes(ca));
 820         sysfs_print(first_bucket,       ca->mi.first_bucket);
 821         sysfs_print(nbuckets,           ca->mi.nbuckets);
 822         sysfs_print(durability,         ca->mi.durability);
 823         sysfs_print(discard,            ca->mi.discard);
 824
 825         if (attr == &sysfs_label) {
 826                 if (ca->mi.group) {
 827                         mutex_lock(&c->sb_lock);
 828                         bch2_disk_path_to_text(&out, &c->disk_sb,
 829                                                ca->mi.group - 1);
 830                         mutex_unlock(&c->sb_lock);
 831                 }
 832
 833                 pr_buf(&out, "\n");
 834                 return out.pos - buf;
 835         }
 836
 837         if (attr == &sysfs_has_data) {
 838                 bch2_flags_to_text(&out, bch2_data_types,
 839                                    bch2_dev_has_data(c, ca));
 840                 pr_buf(&out, "\n");
 841                 return out.pos - buf;
 842         }
 843
 844         if (attr == &sysfs_state_rw) {
 845                 bch2_string_opt_to_text(&out, bch2_member_states,
 846                                         ca->mi.state);
 847                 pr_buf(&out, "\n");
 848                 return out.pos - buf;
 849         }
 850
 851         if (attr == &sysfs_iodone) {
 852                 dev_iodone_to_text(&out, ca);
 853                 return out.pos - buf;
 854         }
 855
 856         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 857         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 858
 859         if (attr == &sysfs_io_latency_stats_read) {
 860                 bch2_time_stats_to_text(&out, &ca->io_latency[READ]);
 861                 return out.pos - buf;
 862         }
 863         if (attr == &sysfs_io_latency_stats_write) {
 864                 bch2_time_stats_to_text(&out, &ca->io_latency[WRITE]);
 865                 return out.pos - buf;
 866         }
 867
 868         sysfs_printf(congested,                 "%u%%",
 869                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 870                      * 100 / CONGESTED_MAX);
 871
 872         if (attr == &sysfs_reserve_stats) {
 873                 reserve_stats_to_text(&out, ca);
 874                 return out.pos - buf;
 875         }
 876         if (attr == &sysfs_alloc_debug) {
 877                 dev_alloc_debug_to_text(&out, ca);
 878                 return out.pos - buf;
 879         }
 880
 881         return 0;
 882 }
 883
 884 STORE(bch2_dev)
 885 {
 886         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 887         struct bch_fs *c = ca->fs;
 888         struct bch_member *mi;
 889
 890         if (attr == &sysfs_discard) {
 891                 bool v = strtoul_or_return(buf);
 892
 893                 mutex_lock(&c->sb_lock);
 894                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 895
 896                 if (v != BCH_MEMBER_DISCARD(mi)) {
 897                         SET_BCH_MEMBER_DISCARD(mi, v);
 898                         bch2_write_super(c);
 899                 }
 900                 mutex_unlock(&c->sb_lock);
 901         }
 902
 903         if (attr == &sysfs_label) {
 904                 char *tmp;
 905                 int ret;
 906
 907                 tmp = kstrdup(buf, GFP_KERNEL);
 908                 if (!tmp)
 909                         return -ENOMEM;
 910
 911                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 912                 kfree(tmp);
 913                 if (ret)
 914                         return ret;
 915         }
 916
 917         if (attr == &sysfs_wake_allocator)
 918                 bch2_wake_allocator(ca);
 919
 920         return size;
 921 }
 922 SYSFS_OPS(bch2_dev);
 923
 924 struct attribute *bch2_dev_files[] = {
 925         &sysfs_uuid,
 926         &sysfs_bucket_size,
 927         &sysfs_first_bucket,
 928         &sysfs_nbuckets,
 929         &sysfs_durability,
 930
 931         /* settings: */
 932         &sysfs_discard,
 933         &sysfs_state_rw,
 934         &sysfs_label,
 935
 936         &sysfs_has_data,
 937         &sysfs_iodone,
 938
 939         &sysfs_io_latency_read,
 940         &sysfs_io_latency_write,
 941         &sysfs_io_latency_stats_read,
 942         &sysfs_io_latency_stats_write,
 943         &sysfs_congested,
 944
 945         &sysfs_reserve_stats,
 946
 947         /* debug: */
 948         &sysfs_alloc_debug,
 949         &sysfs_wake_allocator,
 950         NULL
 951 };
 952
 953 #endif  /* _BCACHEFS_SYSFS_H_ */