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 ## _to_text(struct printbuf *,                        \
  50                               struct kobject *, struct attribute *);\
  51                                                                         \
  52 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  53                            char *buf)                                   \
  54 {                                                                       \
  55         struct printbuf out = PRINTBUF;                                 \
  56         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  57                                                                         \
  58         if (!ret && out.allocation_failure)                             \
  59                 ret = -ENOMEM;                                          \
  60                                                                         \
  61         if (!ret) {                                                     \
  62                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  63                 memcpy(buf, out.buf, ret);                              \
  64         }                                                               \
  65         printbuf_exit(&out);                                            \
  66         return ret;                                                     \
  67 }                                                                       \
  68                                                                         \
  69 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  70                               struct attribute *attr)
  71
  72 #define STORE(fn)                                                       \
  73 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  74                             const char *buf, size_t size)               \
  75
  76 #define __sysfs_attribute(_name, _mode)                                 \
  77         static struct attribute sysfs_##_name =                         \
  78                 { .name = #_name, .mode = _mode }
  79
  80 #define write_attribute(n)      __sysfs_attribute(n, S_IWUSR)
  81 #define read_attribute(n)       __sysfs_attribute(n, S_IRUGO)
  82 #define rw_attribute(n)         __sysfs_attribute(n, S_IRUGO|S_IWUSR)
  83
  84 #define sysfs_printf(file, fmt, ...)                                    \
  85 do {                                                                    \
  86         if (attr == &sysfs_ ## file)                                    \
  87                 pr_buf(out, fmt "\n", __VA_ARGS__);                     \
  88 } while (0)
  89
  90 #define sysfs_print(file, var)                                          \
  91 do {                                                                    \
  92         if (attr == &sysfs_ ## file)                                    \
  93                 snprint(out, var);                                      \
  94 } while (0)
  95
  96 #define sysfs_hprint(file, val)                                         \
  97 do {                                                                    \
  98         if (attr == &sysfs_ ## file)                                    \
  99                 bch2_hprint(out, val);                                  \
 100 } while (0)
 101
 102 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 103 #define var_print(_var)         sysfs_print(_var, var(_var))
 104 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 105
 106 #define sysfs_strtoul(file, var)                                        \
 107 do {                                                                    \
 108         if (attr == &sysfs_ ## file)                                    \
 109                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 110 } while (0)
 111
 112 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 113 do {                                                                    \
 114         if (attr == &sysfs_ ## file)                                    \
 115                 return strtoul_safe_clamp(buf, var, min, max)           \
 116                         ?: (ssize_t) size;                              \
 117 } while (0)
 118
 119 #define strtoul_or_return(cp)                                           \
 120 ({                                                                      \
 121         unsigned long _v;                                               \
 122         int _r = kstrtoul(cp, 10, &_v);                                 \
 123         if (_r)                                                         \
 124                 return _r;                                              \
 125         _v;                                                             \
 126 })
 127
 128 #define strtoul_restrict_or_return(cp, min, max)                        \
 129 ({                                                                      \
 130         unsigned long __v = 0;                                          \
 131         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 132         if (_r)                                                         \
 133                 return _r;                                              \
 134         __v;                                                            \
 135 })
 136
 137 #define strtoi_h_or_return(cp)                                          \
 138 ({                                                                      \
 139         u64 _v;                                                         \
 140         int _r = strtoi_h(cp, &_v);                                     \
 141         if (_r)                                                         \
 142                 return _r;                                              \
 143         _v;                                                             \
 144 })
 145
 146 #define sysfs_hatoi(file, var)                                          \
 147 do {                                                                    \
 148         if (attr == &sysfs_ ## file)                                    \
 149                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 150 } while (0)
 151
 152 write_attribute(trigger_gc);
 153 write_attribute(prune_cache);
 154 rw_attribute(btree_gc_periodic);
 155 rw_attribute(gc_gens_pos);
 156
 157 read_attribute(uuid);
 158 read_attribute(minor);
 159 read_attribute(bucket_size);
 160 read_attribute(first_bucket);
 161 read_attribute(nbuckets);
 162 read_attribute(durability);
 163 read_attribute(iodone);
 164
 165 read_attribute(io_latency_read);
 166 read_attribute(io_latency_write);
 167 read_attribute(io_latency_stats_read);
 168 read_attribute(io_latency_stats_write);
 169 read_attribute(congested);
 170
 171 read_attribute(btree_avg_write_size);
 172
 173 read_attribute(reserve_stats);
 174 read_attribute(btree_cache_size);
 175 read_attribute(compression_stats);
 176 read_attribute(journal_debug);
 177 read_attribute(btree_updates);
 178 read_attribute(btree_cache);
 179 read_attribute(btree_key_cache);
 180 read_attribute(btree_transactions);
 181 read_attribute(stripes_heap);
 182 read_attribute(open_buckets);
 183
 184 read_attribute(internal_uuid);
 185
 186 read_attribute(has_data);
 187 read_attribute(alloc_debug);
 188 write_attribute(wake_allocator);
 189
 190 read_attribute(read_realloc_races);
 191 read_attribute(extent_migrate_done);
 192 read_attribute(extent_migrate_raced);
 193
 194 rw_attribute(discard);
 195 rw_attribute(label);
 196
 197 rw_attribute(copy_gc_enabled);
 198 read_attribute(copy_gc_wait);
 199
 200 rw_attribute(rebalance_enabled);
 201 sysfs_pd_controller_attribute(rebalance);
 202 read_attribute(rebalance_work);
 203 rw_attribute(promote_whole_extents);
 204
 205 read_attribute(new_stripes);
 206
 207 read_attribute(io_timers_read);
 208 read_attribute(io_timers_write);
 209
 210 read_attribute(data_jobs);
 211
 212 #ifdef CONFIG_BCACHEFS_TESTS
 213 write_attribute(perf_test);
 214 #endif /* CONFIG_BCACHEFS_TESTS */
 215
 216 #define x(_name)                                                \
 217         static struct attribute sysfs_time_stat_##_name =               \
 218                 { .name = #_name, .mode = S_IRUGO };
 219         BCH_TIME_STATS()
 220 #undef x
 221
 222 static struct attribute sysfs_state_rw = {
 223         .name = "state",
 224         .mode = S_IRUGO
 225 };
 226
 227 static size_t bch2_btree_cache_size(struct bch_fs *c)
 228 {
 229         size_t ret = 0;
 230         struct btree *b;
 231
 232         mutex_lock(&c->btree_cache.lock);
 233         list_for_each_entry(b, &c->btree_cache.live, list)
 234                 ret += btree_bytes(c);
 235
 236         mutex_unlock(&c->btree_cache.lock);
 237         return ret;
 238 }
 239
 240 static size_t bch2_btree_avg_write_size(struct bch_fs *c)
 241 {
 242         u64 nr = atomic64_read(&c->btree_writes_nr);
 243         u64 sectors = atomic64_read(&c->btree_writes_sectors);
 244
 245         return nr ? div64_u64(sectors, nr) : 0;
 246 }
 247
 248 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 249 {
 250         long ret = 0;
 251         struct bch_move_stats *stats;
 252
 253         mutex_lock(&c->data_progress_lock);
 254         list_for_each_entry(stats, &c->data_progress_list, list) {
 255                 pr_buf(out, "%s: data type %s btree_id %s position: ",
 256                        stats->name,
 257                        bch2_data_types[stats->data_type],
 258                        bch2_btree_ids[stats->btree_id]);
 259                 bch2_bpos_to_text(out, stats->pos);
 260                 pr_buf(out, "%s", "\n");
 261         }
 262
 263         mutex_unlock(&c->data_progress_lock);
 264         return ret;
 265 }
 266
 267 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 268 {
 269         struct btree_trans trans;
 270         struct btree_iter iter;
 271         struct bkey_s_c k;
 272         enum btree_id id;
 273         u64 nr_uncompressed_extents = 0,
 274             nr_compressed_extents = 0,
 275             nr_incompressible_extents = 0,
 276             uncompressed_sectors = 0,
 277             incompressible_sectors = 0,
 278             compressed_sectors_compressed = 0,
 279             compressed_sectors_uncompressed = 0;
 280         int ret;
 281
 282         if (!test_bit(BCH_FS_STARTED, &c->flags))
 283                 return -EPERM;
 284
 285         bch2_trans_init(&trans, c, 0, 0);
 286
 287         for (id = 0; id < BTREE_ID_NR; id++) {
 288                 if (!((1U << id) & BTREE_ID_HAS_PTRS))
 289                         continue;
 290
 291                 for_each_btree_key(&trans, iter, id, POS_MIN,
 292                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 293                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 294                         const union bch_extent_entry *entry;
 295                         struct extent_ptr_decoded p;
 296                         bool compressed = false, uncompressed = false, incompressible = false;
 297
 298                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 299                                 switch (p.crc.compression_type) {
 300                                 case BCH_COMPRESSION_TYPE_none:
 301                                         uncompressed = true;
 302                                         uncompressed_sectors += k.k->size;
 303                                         break;
 304                                 case BCH_COMPRESSION_TYPE_incompressible:
 305                                         incompressible = true;
 306                                         incompressible_sectors += k.k->size;
 307                                         break;
 308                                 default:
 309                                         compressed_sectors_compressed +=
 310                                                 p.crc.compressed_size;
 311                                         compressed_sectors_uncompressed +=
 312                                                 p.crc.uncompressed_size;
 313                                         compressed = true;
 314                                         break;
 315                                 }
 316                         }
 317
 318                         if (incompressible)
 319                                 nr_incompressible_extents++;
 320                         else if (uncompressed)
 321                                 nr_uncompressed_extents++;
 322                         else if (compressed)
 323                                 nr_compressed_extents++;
 324                 }
 325                 bch2_trans_iter_exit(&trans, &iter);
 326         }
 327
 328         bch2_trans_exit(&trans);
 329
 330         if (ret)
 331                 return ret;
 332
 333         pr_buf(out, "uncompressed:\n");
 334         pr_buf(out, "   nr extents:             %llu\n", nr_uncompressed_extents);
 335         pr_buf(out, "   size:                   ");
 336         bch2_hprint(out, uncompressed_sectors << 9);
 337         pr_buf(out, "\n");
 338
 339         pr_buf(out, "compressed:\n");
 340         pr_buf(out, "   nr extents:             %llu\n", nr_compressed_extents);
 341         pr_buf(out, "   compressed size:        ");
 342         bch2_hprint(out, compressed_sectors_compressed << 9);
 343         pr_buf(out, "\n");
 344         pr_buf(out, "   uncompressed size:      ");
 345         bch2_hprint(out, compressed_sectors_uncompressed << 9);
 346         pr_buf(out, "\n");
 347
 348         pr_buf(out, "incompressible:\n");
 349         pr_buf(out, "   nr extents:             %llu\n", nr_incompressible_extents);
 350         pr_buf(out, "   size:                   ");
 351         bch2_hprint(out, incompressible_sectors << 9);
 352         pr_buf(out, "\n");
 353         return 0;
 354 }
 355
 356 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 357 {
 358         pr_buf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 359         bch2_bpos_to_text(out, c->gc_gens_pos);
 360         pr_buf(out, "\n");
 361 }
 362
 363 SHOW(bch2_fs)
 364 {
 365         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 366
 367         sysfs_print(minor,                      c->minor);
 368         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 369
 370         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 371         sysfs_hprint(btree_avg_write_size,      bch2_btree_avg_write_size(c));
 372
 373         sysfs_print(read_realloc_races,
 374                     atomic_long_read(&c->read_realloc_races));
 375         sysfs_print(extent_migrate_done,
 376                     atomic_long_read(&c->extent_migrate_done));
 377         sysfs_print(extent_migrate_raced,
 378                     atomic_long_read(&c->extent_migrate_raced));
 379
 380         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 381
 382         if (attr == &sysfs_gc_gens_pos)
 383                 bch2_gc_gens_pos_to_text(out, c);
 384
 385         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 386
 387         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 388         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 389         sysfs_hprint(copy_gc_wait,
 390                      max(0LL, c->copygc_wait -
 391                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 392
 393         if (attr == &sysfs_rebalance_work)
 394                 bch2_rebalance_work_to_text(out, c);
 395
 396         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 397
 398         /* Debugging: */
 399
 400         if (attr == &sysfs_journal_debug)
 401                 bch2_journal_debug_to_text(out, &c->journal);
 402
 403         if (attr == &sysfs_btree_updates)
 404                 bch2_btree_updates_to_text(out, c);
 405
 406         if (attr == &sysfs_btree_cache)
 407                 bch2_btree_cache_to_text(out, c);
 408
 409         if (attr == &sysfs_btree_key_cache)
 410                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 411
 412         if (attr == &sysfs_btree_transactions)
 413                 bch2_btree_trans_to_text(out, c);
 414
 415         if (attr == &sysfs_stripes_heap)
 416                 bch2_stripes_heap_to_text(out, c);
 417
 418         if (attr == &sysfs_open_buckets)
 419                 bch2_open_buckets_to_text(out, c);
 420
 421         if (attr == &sysfs_compression_stats)
 422                 bch2_compression_stats_to_text(out, c);
 423
 424         if (attr == &sysfs_new_stripes)
 425                 bch2_new_stripes_to_text(out, c);
 426
 427         if (attr == &sysfs_io_timers_read)
 428                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 429
 430         if (attr == &sysfs_io_timers_write)
 431                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 432
 433         if (attr == &sysfs_data_jobs)
 434                 data_progress_to_text(out, c);
 435
 436         return 0;
 437 }
 438
 439 STORE(bch2_fs)
 440 {
 441         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 442
 443         if (attr == &sysfs_btree_gc_periodic) {
 444                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 445                         ?: (ssize_t) size;
 446
 447                 wake_up_process(c->gc_thread);
 448                 return ret;
 449         }
 450
 451         if (attr == &sysfs_copy_gc_enabled) {
 452                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 453                         ?: (ssize_t) size;
 454
 455                 if (c->copygc_thread)
 456                         wake_up_process(c->copygc_thread);
 457                 return ret;
 458         }
 459
 460         if (attr == &sysfs_rebalance_enabled) {
 461                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 462                         ?: (ssize_t) size;
 463
 464                 rebalance_wakeup(c);
 465                 return ret;
 466         }
 467
 468         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 469
 470         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 471
 472         /* Debugging: */
 473
 474         if (!test_bit(BCH_FS_STARTED, &c->flags))
 475                 return -EPERM;
 476
 477         /* Debugging: */
 478
 479         if (!test_bit(BCH_FS_RW, &c->flags))
 480                 return -EROFS;
 481
 482         if (attr == &sysfs_prune_cache) {
 483                 struct shrink_control sc;
 484
 485                 sc.gfp_mask = GFP_KERNEL;
 486                 sc.nr_to_scan = strtoul_or_return(buf);
 487                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 488         }
 489
 490         if (attr == &sysfs_trigger_gc) {
 491                 /*
 492                  * Full gc is currently incompatible with btree key cache:
 493                  */
 494 #if 0
 495                 down_read(&c->state_lock);
 496                 bch2_gc(c, false, false);
 497                 up_read(&c->state_lock);
 498 #else
 499                 bch2_gc_gens(c);
 500 #endif
 501         }
 502
 503 #ifdef CONFIG_BCACHEFS_TESTS
 504         if (attr == &sysfs_perf_test) {
 505                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 506                 char *test              = strsep(&p, " \t\n");
 507                 char *nr_str            = strsep(&p, " \t\n");
 508                 char *threads_str       = strsep(&p, " \t\n");
 509                 unsigned threads;
 510                 u64 nr;
 511                 int ret = -EINVAL;
 512
 513                 if (threads_str &&
 514                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 515                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 516                         ret = bch2_btree_perf_test(c, test, nr, threads);
 517                 kfree(tmp);
 518
 519                 if (ret)
 520                         size = ret;
 521         }
 522 #endif
 523         return size;
 524 }
 525 SYSFS_OPS(bch2_fs);
 526
 527 struct attribute *bch2_fs_files[] = {
 528         &sysfs_minor,
 529         &sysfs_btree_cache_size,
 530         &sysfs_btree_avg_write_size,
 531
 532         &sysfs_promote_whole_extents,
 533
 534         &sysfs_compression_stats,
 535
 536 #ifdef CONFIG_BCACHEFS_TESTS
 537         &sysfs_perf_test,
 538 #endif
 539         NULL
 540 };
 541
 542 /* internal dir - just a wrapper */
 543
 544 SHOW(bch2_fs_internal)
 545 {
 546         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 547         return bch2_fs_to_text(out, &c->kobj, attr);
 548 }
 549
 550 STORE(bch2_fs_internal)
 551 {
 552         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 553         return bch2_fs_store(&c->kobj, attr, buf, size);
 554 }
 555 SYSFS_OPS(bch2_fs_internal);
 556
 557 struct attribute *bch2_fs_internal_files[] = {
 558         &sysfs_journal_debug,
 559         &sysfs_btree_updates,
 560         &sysfs_btree_cache,
 561         &sysfs_btree_key_cache,
 562         &sysfs_btree_transactions,
 563         &sysfs_new_stripes,
 564         &sysfs_stripes_heap,
 565         &sysfs_open_buckets,
 566         &sysfs_io_timers_read,
 567         &sysfs_io_timers_write,
 568
 569         &sysfs_trigger_gc,
 570         &sysfs_prune_cache,
 571
 572         &sysfs_read_realloc_races,
 573         &sysfs_extent_migrate_done,
 574         &sysfs_extent_migrate_raced,
 575
 576         &sysfs_gc_gens_pos,
 577
 578         &sysfs_copy_gc_enabled,
 579         &sysfs_copy_gc_wait,
 580
 581         &sysfs_rebalance_enabled,
 582         &sysfs_rebalance_work,
 583         sysfs_pd_controller_files(rebalance),
 584
 585         &sysfs_data_jobs,
 586
 587         &sysfs_internal_uuid,
 588         NULL
 589 };
 590
 591 /* options */
 592
 593 SHOW(bch2_fs_opts_dir)
 594 {
 595         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 596         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 597         int id = opt - bch2_opt_table;
 598         u64 v = bch2_opt_get_by_id(&c->opts, id);
 599
 600         bch2_opt_to_text(out, c, opt, v, OPT_SHOW_FULL_LIST);
 601         pr_char(out, '\n');
 602
 603         return 0;
 604 }
 605
 606 STORE(bch2_fs_opts_dir)
 607 {
 608         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 609         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 610         int ret, id = opt - bch2_opt_table;
 611         char *tmp;
 612         u64 v;
 613
 614         tmp = kstrdup(buf, GFP_KERNEL);
 615         if (!tmp)
 616                 return -ENOMEM;
 617
 618         ret = bch2_opt_parse(c, NULL, opt, strim(tmp), &v);
 619         kfree(tmp);
 620
 621         if (ret < 0)
 622                 return ret;
 623
 624         ret = bch2_opt_check_may_set(c, id, v);
 625         if (ret < 0)
 626                 return ret;
 627
 628         bch2_opt_set_sb(c, opt, v);
 629         bch2_opt_set_by_id(&c->opts, id, v);
 630
 631         if ((id == Opt_background_target ||
 632              id == Opt_background_compression) && v) {
 633                 bch2_rebalance_add_work(c, S64_MAX);
 634                 rebalance_wakeup(c);
 635         }
 636
 637         return size;
 638 }
 639 SYSFS_OPS(bch2_fs_opts_dir);
 640
 641 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 642
 643 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 644 {
 645         const struct bch_option *i;
 646         int ret;
 647
 648         for (i = bch2_opt_table;
 649              i < bch2_opt_table + bch2_opts_nr;
 650              i++) {
 651                 if (!(i->flags & OPT_FS))
 652                         continue;
 653
 654                 ret = sysfs_create_file(kobj, &i->attr);
 655                 if (ret)
 656                         return ret;
 657         }
 658
 659         return 0;
 660 }
 661
 662 /* time stats */
 663
 664 SHOW(bch2_fs_time_stats)
 665 {
 666         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 667
 668 #define x(name)                                                         \
 669         if (attr == &sysfs_time_stat_##name)                            \
 670                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 671         BCH_TIME_STATS()
 672 #undef x
 673
 674         return 0;
 675 }
 676
 677 STORE(bch2_fs_time_stats)
 678 {
 679         return size;
 680 }
 681 SYSFS_OPS(bch2_fs_time_stats);
 682
 683 struct attribute *bch2_fs_time_stats_files[] = {
 684 #define x(name)                                         \
 685         &sysfs_time_stat_##name,
 686         BCH_TIME_STATS()
 687 #undef x
 688         NULL
 689 };
 690
 691 static void reserve_stats_to_text(struct printbuf *out, struct bch_dev *ca)
 692 {
 693         enum alloc_reserve i;
 694
 695         spin_lock(&ca->fs->freelist_lock);
 696
 697         pr_buf(out, "free_inc:\t%zu\t%zu\n",
 698                fifo_used(&ca->free_inc),
 699                ca->free_inc.size);
 700
 701         for (i = 0; i < RESERVE_NR; i++)
 702                 pr_buf(out, "free[%u]:\t%zu\t%zu\n", i,
 703                        fifo_used(&ca->free[i]),
 704                        ca->free[i].size);
 705
 706         spin_unlock(&ca->fs->freelist_lock);
 707 }
 708
 709 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 710 {
 711         struct bch_fs *c = ca->fs;
 712         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 713         unsigned i, nr[BCH_DATA_NR];
 714
 715         memset(nr, 0, sizeof(nr));
 716
 717         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 718                 nr[c->open_buckets[i].data_type]++;
 719
 720         pr_buf(out,
 721                "\t\t buckets\t sectors      fragmented\n"
 722                "capacity%16llu\n",
 723                ca->mi.nbuckets - ca->mi.first_bucket);
 724
 725         for (i = 1; i < BCH_DATA_NR; i++)
 726                 pr_buf(out, "%-8s%16llu%16llu%16llu\n",
 727                        bch2_data_types[i], stats.d[i].buckets,
 728                        stats.d[i].sectors, stats.d[i].fragmented);
 729
 730         pr_buf(out,
 731                "ec\t%16llu\n"
 732                "available%15llu\n"
 733                "\n"
 734                "free_inc\t\t%zu/%zu\n"
 735                "free[RESERVE_MOVINGGC]\t%zu/%zu\n"
 736                "free[RESERVE_NONE]\t%zu/%zu\n"
 737                "freelist_wait\t\t%s\n"
 738                "open buckets allocated\t%u\n"
 739                "open buckets this dev\t%u\n"
 740                "open buckets total\t%u\n"
 741                "open_buckets_wait\t%s\n"
 742                "open_buckets_btree\t%u\n"
 743                "open_buckets_user\t%u\n"
 744                "btree reserve cache\t%u\n"
 745                "thread state:\t\t%s\n",
 746                stats.buckets_ec,
 747                __dev_buckets_available(ca, stats),
 748                fifo_used(&ca->free_inc),                ca->free_inc.size,
 749                fifo_used(&ca->free[RESERVE_MOVINGGC]),  ca->free[RESERVE_MOVINGGC].size,
 750                fifo_used(&ca->free[RESERVE_NONE]),      ca->free[RESERVE_NONE].size,
 751                c->freelist_wait.list.first              ? "waiting" : "empty",
 752                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 753                ca->nr_open_buckets,
 754                OPEN_BUCKETS_COUNT,
 755                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 756                nr[BCH_DATA_btree],
 757                nr[BCH_DATA_user],
 758                c->btree_reserve_cache_nr,
 759                bch2_allocator_states[ca->allocator_state]);
 760 }
 761
 762 static const char * const bch2_rw[] = {
 763         "read",
 764         "write",
 765         NULL
 766 };
 767
 768 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 769 {
 770         int rw, i;
 771
 772         for (rw = 0; rw < 2; rw++) {
 773                 pr_buf(out, "%s:\n", bch2_rw[rw]);
 774
 775                 for (i = 1; i < BCH_DATA_NR; i++)
 776                         pr_buf(out, "%-12s:%12llu\n",
 777                                bch2_data_types[i],
 778                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 779         }
 780 }
 781
 782 SHOW(bch2_dev)
 783 {
 784         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 785         struct bch_fs *c = ca->fs;
 786
 787         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 788
 789         sysfs_print(bucket_size,        bucket_bytes(ca));
 790         sysfs_print(first_bucket,       ca->mi.first_bucket);
 791         sysfs_print(nbuckets,           ca->mi.nbuckets);
 792         sysfs_print(durability,         ca->mi.durability);
 793         sysfs_print(discard,            ca->mi.discard);
 794
 795         if (attr == &sysfs_label) {
 796                 if (ca->mi.group) {
 797                         mutex_lock(&c->sb_lock);
 798                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 799                                                ca->mi.group - 1);
 800                         mutex_unlock(&c->sb_lock);
 801                 }
 802
 803                 pr_char(out, '\n');
 804         }
 805
 806         if (attr == &sysfs_has_data) {
 807                 bch2_flags_to_text(out, bch2_data_types,
 808                                    bch2_dev_has_data(c, ca));
 809                 pr_char(out, '\n');
 810         }
 811
 812         if (attr == &sysfs_state_rw) {
 813                 bch2_string_opt_to_text(out, bch2_member_states,
 814                                         ca->mi.state);
 815                 pr_char(out, '\n');
 816         }
 817
 818         if (attr == &sysfs_iodone)
 819                 dev_iodone_to_text(out, ca);
 820
 821         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 822         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 823
 824         if (attr == &sysfs_io_latency_stats_read)
 825                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 826
 827         if (attr == &sysfs_io_latency_stats_write)
 828                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 829
 830         sysfs_printf(congested,                 "%u%%",
 831                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 832                      * 100 / CONGESTED_MAX);
 833
 834         if (attr == &sysfs_reserve_stats)
 835                 reserve_stats_to_text(out, ca);
 836
 837         if (attr == &sysfs_alloc_debug)
 838                 dev_alloc_debug_to_text(out, ca);
 839
 840         return 0;
 841 }
 842
 843 STORE(bch2_dev)
 844 {
 845         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 846         struct bch_fs *c = ca->fs;
 847         struct bch_member *mi;
 848
 849         if (attr == &sysfs_discard) {
 850                 bool v = strtoul_or_return(buf);
 851
 852                 mutex_lock(&c->sb_lock);
 853                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 854
 855                 if (v != BCH_MEMBER_DISCARD(mi)) {
 856                         SET_BCH_MEMBER_DISCARD(mi, v);
 857                         bch2_write_super(c);
 858                 }
 859                 mutex_unlock(&c->sb_lock);
 860         }
 861
 862         if (attr == &sysfs_label) {
 863                 char *tmp;
 864                 int ret;
 865
 866                 tmp = kstrdup(buf, GFP_KERNEL);
 867                 if (!tmp)
 868                         return -ENOMEM;
 869
 870                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 871                 kfree(tmp);
 872                 if (ret)
 873                         return ret;
 874         }
 875
 876         if (attr == &sysfs_wake_allocator)
 877                 bch2_wake_allocator(ca);
 878
 879         return size;
 880 }
 881 SYSFS_OPS(bch2_dev);
 882
 883 struct attribute *bch2_dev_files[] = {
 884         &sysfs_uuid,
 885         &sysfs_bucket_size,
 886         &sysfs_first_bucket,
 887         &sysfs_nbuckets,
 888         &sysfs_durability,
 889
 890         /* settings: */
 891         &sysfs_discard,
 892         &sysfs_state_rw,
 893         &sysfs_label,
 894
 895         &sysfs_has_data,
 896         &sysfs_iodone,
 897
 898         &sysfs_io_latency_read,
 899         &sysfs_io_latency_write,
 900         &sysfs_io_latency_stats_read,
 901         &sysfs_io_latency_stats_write,
 902         &sysfs_congested,
 903
 904         &sysfs_reserve_stats,
 905
 906         /* debug: */
 907         &sysfs_alloc_debug,
 908         &sysfs_wake_allocator,
 909         NULL
 910 };
 911
 912 #endif  /* _BCACHEFS_SYSFS_H_ */