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/pretty-printers.h>
  38 #include <linux/sort.h>
  39 #include <linux/sched/clock.h>
  40
  41 #include "util.h"
  42
  43 #define SYSFS_OPS(type)                                                 \
  44 const struct sysfs_ops type ## _sysfs_ops = {                                   \
  45         .show   = type ## _show,                                        \
  46         .store  = type ## _store                                        \
  47 }
  48
  49 #define SHOW(fn)                                                        \
  50 static ssize_t fn ## _to_text(struct printbuf *,                        \
  51                               struct kobject *, struct attribute *);\
  52                                                                         \
  53 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  54                            char *buf)                                   \
  55 {                                                                       \
  56         struct printbuf out = PRINTBUF;                                 \
  57         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  58                                                                         \
  59         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  60                 prt_newline(&out);                                      \
  61                                                                         \
  62         if (!ret && out.allocation_failure)                             \
  63                 ret = -ENOMEM;                                          \
  64                                                                         \
  65         if (!ret) {                                                     \
  66                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  67                 memcpy(buf, out.buf, ret);                              \
  68         }                                                               \
  69         printbuf_exit(&out);                                            \
  70         return ret;                                                     \
  71 }                                                                       \
  72                                                                         \
  73 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  74                               struct attribute *attr)
  75
  76 #define STORE(fn)                                                       \
  77 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  78                             const char *buf, size_t size)               \
  79
  80 #define __sysfs_attribute(_name, _mode)                                 \
  81         static struct attribute sysfs_##_name =                         \
  82                 { .name = #_name, .mode = _mode }
  83
  84 #define write_attribute(n)      __sysfs_attribute(n, S_IWUSR)
  85 #define read_attribute(n)       __sysfs_attribute(n, S_IRUGO)
  86 #define rw_attribute(n)         __sysfs_attribute(n, S_IRUGO|S_IWUSR)
  87
  88 #define sysfs_printf(file, fmt, ...)                                    \
  89 do {                                                                    \
  90         if (attr == &sysfs_ ## file)                                    \
  91                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
  92 } while (0)
  93
  94 #define sysfs_print(file, var)                                          \
  95 do {                                                                    \
  96         if (attr == &sysfs_ ## file)                                    \
  97                 snprint(out, var);                                      \
  98 } while (0)
  99
 100 #define sysfs_hprint(file, val)                                         \
 101 do {                                                                    \
 102         if (attr == &sysfs_ ## file)                                    \
 103                 prt_human_readable_s64(out, val);                       \
 104 } while (0)
 105
 106 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 107 #define var_print(_var)         sysfs_print(_var, var(_var))
 108 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 109
 110 #define sysfs_strtoul(file, var)                                        \
 111 do {                                                                    \
 112         if (attr == &sysfs_ ## file)                                    \
 113                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 114 } while (0)
 115
 116 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 117 do {                                                                    \
 118         if (attr == &sysfs_ ## file)                                    \
 119                 return strtoul_safe_clamp(buf, var, min, max)           \
 120                         ?: (ssize_t) size;                              \
 121 } while (0)
 122
 123 #define strtoul_or_return(cp)                                           \
 124 ({                                                                      \
 125         unsigned long _v;                                               \
 126         int _r = kstrtoul(cp, 10, &_v);                                 \
 127         if (_r)                                                         \
 128                 return _r;                                              \
 129         _v;                                                             \
 130 })
 131
 132 #define strtoul_restrict_or_return(cp, min, max)                        \
 133 ({                                                                      \
 134         unsigned long __v = 0;                                          \
 135         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 136         if (_r)                                                         \
 137                 return _r;                                              \
 138         __v;                                                            \
 139 })
 140
 141 #define strtoi_h_or_return(cp)                                          \
 142 ({                                                                      \
 143         u64 _v;                                                         \
 144         int _r = strtoi_h(cp, &_v);                                     \
 145         if (_r)                                                         \
 146                 return _r;                                              \
 147         _v;                                                             \
 148 })
 149
 150 #define sysfs_hatoi(file, var)                                          \
 151 do {                                                                    \
 152         if (attr == &sysfs_ ## file)                                    \
 153                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 154 } while (0)
 155
 156 write_attribute(trigger_gc);
 157 write_attribute(trigger_discards);
 158 write_attribute(prune_cache);
 159 rw_attribute(btree_gc_periodic);
 160 rw_attribute(gc_gens_pos);
 161
 162 read_attribute(uuid);
 163 read_attribute(minor);
 164 read_attribute(bucket_size);
 165 read_attribute(first_bucket);
 166 read_attribute(nbuckets);
 167 read_attribute(durability);
 168 read_attribute(iodone);
 169
 170 read_attribute(io_latency_read);
 171 read_attribute(io_latency_write);
 172 read_attribute(io_latency_stats_read);
 173 read_attribute(io_latency_stats_write);
 174 read_attribute(congested);
 175
 176 read_attribute(btree_avg_write_size);
 177
 178 read_attribute(btree_cache_size);
 179 read_attribute(compression_stats);
 180 read_attribute(journal_debug);
 181 read_attribute(btree_updates);
 182 read_attribute(btree_cache);
 183 read_attribute(btree_key_cache);
 184 read_attribute(btree_transactions);
 185 read_attribute(stripes_heap);
 186 read_attribute(open_buckets);
 187
 188 read_attribute(internal_uuid);
 189
 190 read_attribute(has_data);
 191 read_attribute(alloc_debug);
 192
 193 read_attribute(read_realloc_races);
 194 read_attribute(extent_migrate_done);
 195 read_attribute(extent_migrate_raced);
 196 read_attribute(bucket_alloc_fail);
 197
 198 #define x(t, n, ...) read_attribute(t);
 199 BCH_PERSISTENT_COUNTERS()
 200 #undef x
 201
 202 rw_attribute(discard);
 203 rw_attribute(label);
 204
 205 rw_attribute(copy_gc_enabled);
 206 read_attribute(copy_gc_wait);
 207
 208 rw_attribute(rebalance_enabled);
 209 sysfs_pd_controller_attribute(rebalance);
 210 read_attribute(rebalance_work);
 211 rw_attribute(promote_whole_extents);
 212
 213 read_attribute(new_stripes);
 214
 215 read_attribute(io_timers_read);
 216 read_attribute(io_timers_write);
 217
 218 read_attribute(data_jobs);
 219
 220 #ifdef CONFIG_BCACHEFS_TESTS
 221 write_attribute(perf_test);
 222 #endif /* CONFIG_BCACHEFS_TESTS */
 223
 224 #define x(_name)                                                \
 225         static struct attribute sysfs_time_stat_##_name =               \
 226                 { .name = #_name, .mode = S_IRUGO };
 227         BCH_TIME_STATS()
 228 #undef x
 229
 230 static struct attribute sysfs_state_rw = {
 231         .name = "state",
 232         .mode = S_IRUGO
 233 };
 234
 235 static size_t bch2_btree_cache_size(struct bch_fs *c)
 236 {
 237         size_t ret = 0;
 238         struct btree *b;
 239
 240         mutex_lock(&c->btree_cache.lock);
 241         list_for_each_entry(b, &c->btree_cache.live, list)
 242                 ret += btree_bytes(c);
 243
 244         mutex_unlock(&c->btree_cache.lock);
 245         return ret;
 246 }
 247
 248 static size_t bch2_btree_avg_write_size(struct bch_fs *c)
 249 {
 250         u64 nr = atomic64_read(&c->btree_writes_nr);
 251         u64 sectors = atomic64_read(&c->btree_writes_sectors);
 252
 253         return nr ? div64_u64(sectors, nr) : 0;
 254 }
 255
 256 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 257 {
 258         long ret = 0;
 259         struct bch_move_stats *stats;
 260
 261         mutex_lock(&c->data_progress_lock);
 262         list_for_each_entry(stats, &c->data_progress_list, list) {
 263                 prt_printf(out, "%s: data type %s btree_id %s position: ",
 264                        stats->name,
 265                        bch2_data_types[stats->data_type],
 266                        bch2_btree_ids[stats->btree_id]);
 267                 bch2_bpos_to_text(out, stats->pos);
 268                 prt_printf(out, "%s", "\n");
 269         }
 270
 271         mutex_unlock(&c->data_progress_lock);
 272         return ret;
 273 }
 274
 275 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 276 {
 277         struct btree_trans trans;
 278         struct btree_iter iter;
 279         struct bkey_s_c k;
 280         enum btree_id id;
 281         u64 nr_uncompressed_extents = 0,
 282             nr_compressed_extents = 0,
 283             nr_incompressible_extents = 0,
 284             uncompressed_sectors = 0,
 285             incompressible_sectors = 0,
 286             compressed_sectors_compressed = 0,
 287             compressed_sectors_uncompressed = 0;
 288         int ret;
 289
 290         if (!test_bit(BCH_FS_STARTED, &c->flags))
 291                 return -EPERM;
 292
 293         bch2_trans_init(&trans, c, 0, 0);
 294
 295         for (id = 0; id < BTREE_ID_NR; id++) {
 296                 if (!((1U << id) & BTREE_ID_HAS_PTRS))
 297                         continue;
 298
 299                 for_each_btree_key(&trans, iter, id, POS_MIN,
 300                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 301                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 302                         const union bch_extent_entry *entry;
 303                         struct extent_ptr_decoded p;
 304                         bool compressed = false, uncompressed = false, incompressible = false;
 305
 306                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 307                                 switch (p.crc.compression_type) {
 308                                 case BCH_COMPRESSION_TYPE_none:
 309                                         uncompressed = true;
 310                                         uncompressed_sectors += k.k->size;
 311                                         break;
 312                                 case BCH_COMPRESSION_TYPE_incompressible:
 313                                         incompressible = true;
 314                                         incompressible_sectors += k.k->size;
 315                                         break;
 316                                 default:
 317                                         compressed_sectors_compressed +=
 318                                                 p.crc.compressed_size;
 319                                         compressed_sectors_uncompressed +=
 320                                                 p.crc.uncompressed_size;
 321                                         compressed = true;
 322                                         break;
 323                                 }
 324                         }
 325
 326                         if (incompressible)
 327                                 nr_incompressible_extents++;
 328                         else if (uncompressed)
 329                                 nr_uncompressed_extents++;
 330                         else if (compressed)
 331                                 nr_compressed_extents++;
 332                 }
 333                 bch2_trans_iter_exit(&trans, &iter);
 334         }
 335
 336         bch2_trans_exit(&trans);
 337
 338         if (ret)
 339                 return ret;
 340
 341         prt_printf(out, "uncompressed:\n");
 342         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 343         prt_printf(out, "       size:                   ");
 344         prt_human_readable_u64(out, uncompressed_sectors << 9);
 345         prt_printf(out, "\n");
 346
 347         prt_printf(out, "compressed:\n");
 348         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 349         prt_printf(out, "       compressed size:        ");
 350         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 351         prt_printf(out, "\n");
 352         prt_printf(out, "       uncompressed size:      ");
 353         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 354         prt_printf(out, "\n");
 355
 356         prt_printf(out, "incompressible:\n");
 357         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 358         prt_printf(out, "       size:                   ");
 359         prt_human_readable_u64(out, incompressible_sectors << 9);
 360         prt_printf(out, "\n");
 361         return 0;
 362 }
 363
 364 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 365 {
 366         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 367         bch2_bpos_to_text(out, c->gc_gens_pos);
 368         prt_printf(out, "\n");
 369 }
 370
 371 SHOW(bch2_fs)
 372 {
 373         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 374
 375         sysfs_print(minor,                      c->minor);
 376         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 377
 378         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 379         sysfs_hprint(btree_avg_write_size,      bch2_btree_avg_write_size(c));
 380
 381         sysfs_print(read_realloc_races,
 382                     atomic_long_read(&c->read_realloc_races));
 383         sysfs_print(extent_migrate_done,
 384                     atomic_long_read(&c->extent_migrate_done));
 385         sysfs_print(extent_migrate_raced,
 386                     atomic_long_read(&c->extent_migrate_raced));
 387         sysfs_print(bucket_alloc_fail,
 388                     atomic_long_read(&c->bucket_alloc_fail));
 389
 390         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 391
 392         if (attr == &sysfs_gc_gens_pos)
 393                 bch2_gc_gens_pos_to_text(out, c);
 394
 395         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 396
 397         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 398         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 399         sysfs_hprint(copy_gc_wait,
 400                      max(0LL, c->copygc_wait -
 401                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 402
 403         if (attr == &sysfs_rebalance_work)
 404                 bch2_rebalance_work_to_text(out, c);
 405
 406         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 407
 408         /* Debugging: */
 409
 410         if (attr == &sysfs_journal_debug)
 411                 bch2_journal_debug_to_text(out, &c->journal);
 412
 413         if (attr == &sysfs_btree_updates)
 414                 bch2_btree_updates_to_text(out, c);
 415
 416         if (attr == &sysfs_btree_cache)
 417                 bch2_btree_cache_to_text(out, c);
 418
 419         if (attr == &sysfs_btree_key_cache)
 420                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 421
 422         if (attr == &sysfs_btree_transactions)
 423                 bch2_btree_trans_to_text(out, c);
 424
 425         if (attr == &sysfs_stripes_heap)
 426                 bch2_stripes_heap_to_text(out, c);
 427
 428         if (attr == &sysfs_open_buckets)
 429                 bch2_open_buckets_to_text(out, c);
 430
 431         if (attr == &sysfs_compression_stats)
 432                 bch2_compression_stats_to_text(out, c);
 433
 434         if (attr == &sysfs_new_stripes)
 435                 bch2_new_stripes_to_text(out, c);
 436
 437         if (attr == &sysfs_io_timers_read)
 438                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 439
 440         if (attr == &sysfs_io_timers_write)
 441                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 442
 443         if (attr == &sysfs_data_jobs)
 444                 data_progress_to_text(out, c);
 445
 446         return 0;
 447 }
 448
 449 STORE(bch2_fs)
 450 {
 451         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 452
 453         if (attr == &sysfs_btree_gc_periodic) {
 454                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 455                         ?: (ssize_t) size;
 456
 457                 wake_up_process(c->gc_thread);
 458                 return ret;
 459         }
 460
 461         if (attr == &sysfs_copy_gc_enabled) {
 462                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 463                         ?: (ssize_t) size;
 464
 465                 if (c->copygc_thread)
 466                         wake_up_process(c->copygc_thread);
 467                 return ret;
 468         }
 469
 470         if (attr == &sysfs_rebalance_enabled) {
 471                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 472                         ?: (ssize_t) size;
 473
 474                 rebalance_wakeup(c);
 475                 return ret;
 476         }
 477
 478         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 479
 480         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 481
 482         /* Debugging: */
 483
 484         if (!test_bit(BCH_FS_STARTED, &c->flags))
 485                 return -EPERM;
 486
 487         /* Debugging: */
 488
 489         if (!test_bit(BCH_FS_RW, &c->flags))
 490                 return -EROFS;
 491
 492         if (attr == &sysfs_prune_cache) {
 493                 struct shrink_control sc;
 494
 495                 sc.gfp_mask = GFP_KERNEL;
 496                 sc.nr_to_scan = strtoul_or_return(buf);
 497                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 498         }
 499
 500         if (attr == &sysfs_trigger_gc) {
 501                 /*
 502                  * Full gc is currently incompatible with btree key cache:
 503                  */
 504 #if 0
 505                 down_read(&c->state_lock);
 506                 bch2_gc(c, false, false);
 507                 up_read(&c->state_lock);
 508 #else
 509                 bch2_gc_gens(c);
 510 #endif
 511         }
 512
 513         if (attr == &sysfs_trigger_discards)
 514                 bch2_do_discards(c);
 515
 516 #ifdef CONFIG_BCACHEFS_TESTS
 517         if (attr == &sysfs_perf_test) {
 518                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 519                 char *test              = strsep(&p, " \t\n");
 520                 char *nr_str            = strsep(&p, " \t\n");
 521                 char *threads_str       = strsep(&p, " \t\n");
 522                 unsigned threads;
 523                 u64 nr;
 524                 int ret = -EINVAL;
 525
 526                 if (threads_str &&
 527                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 528                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 529                         ret = bch2_btree_perf_test(c, test, nr, threads);
 530                 kfree(tmp);
 531
 532                 if (ret)
 533                         size = ret;
 534         }
 535 #endif
 536         return size;
 537 }
 538 SYSFS_OPS(bch2_fs);
 539
 540 struct attribute *bch2_fs_files[] = {
 541         &sysfs_minor,
 542         &sysfs_btree_cache_size,
 543         &sysfs_btree_avg_write_size,
 544
 545         &sysfs_promote_whole_extents,
 546
 547         &sysfs_compression_stats,
 548
 549 #ifdef CONFIG_BCACHEFS_TESTS
 550         &sysfs_perf_test,
 551 #endif
 552         NULL
 553 };
 554
 555 /* counters dir */
 556
 557 SHOW(bch2_fs_counters)
 558 {
 559         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 560         u64 counter = 0;
 561         u64 counter_since_mount = 0;
 562
 563         out->tabstops[0] = 32;
 564         #define x(t, ...) \
 565                 if (attr == &sysfs_##t) {                                       \
 566                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 567                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 568                         prt_printf(out, "since mount:");                                \
 569                         prt_tab(out);                                           \
 570                         prt_human_readable_u64(out, counter_since_mount << 9);  \
 571                         prt_newline(out);                                       \
 572                                                                                 \
 573                         prt_printf(out, "since filesystem creation:");          \
 574                         prt_tab(out);                                           \
 575                         prt_human_readable_u64(out, counter << 9);              \
 576                         prt_newline(out);                                       \
 577                 }
 578         BCH_PERSISTENT_COUNTERS()
 579         #undef x
 580         return 0;
 581 }
 582
 583 STORE(bch2_fs_counters) {
 584         return 0;
 585 }
 586
 587 SYSFS_OPS(bch2_fs_counters);
 588
 589 struct attribute *bch2_fs_counters_files[] = {
 590 #define x(t, ...) \
 591         &sysfs_##t,
 592         BCH_PERSISTENT_COUNTERS()
 593 #undef x
 594         NULL
 595 };
 596 /* internal dir - just a wrapper */
 597
 598 SHOW(bch2_fs_internal)
 599 {
 600         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 601         return bch2_fs_to_text(out, &c->kobj, attr);
 602 }
 603
 604 STORE(bch2_fs_internal)
 605 {
 606         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 607         return bch2_fs_store(&c->kobj, attr, buf, size);
 608 }
 609 SYSFS_OPS(bch2_fs_internal);
 610
 611 struct attribute *bch2_fs_internal_files[] = {
 612         &sysfs_journal_debug,
 613         &sysfs_btree_updates,
 614         &sysfs_btree_cache,
 615         &sysfs_btree_key_cache,
 616         &sysfs_btree_transactions,
 617         &sysfs_new_stripes,
 618         &sysfs_stripes_heap,
 619         &sysfs_open_buckets,
 620         &sysfs_io_timers_read,
 621         &sysfs_io_timers_write,
 622
 623         &sysfs_trigger_gc,
 624         &sysfs_trigger_discards,
 625         &sysfs_prune_cache,
 626
 627         &sysfs_read_realloc_races,
 628         &sysfs_extent_migrate_done,
 629         &sysfs_extent_migrate_raced,
 630         &sysfs_bucket_alloc_fail,
 631
 632         &sysfs_gc_gens_pos,
 633
 634         &sysfs_copy_gc_enabled,
 635         &sysfs_copy_gc_wait,
 636
 637         &sysfs_rebalance_enabled,
 638         &sysfs_rebalance_work,
 639         sysfs_pd_controller_files(rebalance),
 640
 641         &sysfs_data_jobs,
 642
 643         &sysfs_internal_uuid,
 644         NULL
 645 };
 646
 647 /* options */
 648
 649 SHOW(bch2_fs_opts_dir)
 650 {
 651         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 652         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 653         int id = opt - bch2_opt_table;
 654         u64 v = bch2_opt_get_by_id(&c->opts, id);
 655
 656         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 657         prt_char(out, '\n');
 658
 659         return 0;
 660 }
 661
 662 STORE(bch2_fs_opts_dir)
 663 {
 664         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 665         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 666         int ret, id = opt - bch2_opt_table;
 667         char *tmp;
 668         u64 v;
 669
 670         /*
 671          * We don't need to take c->writes for correctness, but it eliminates an
 672          * unsightly error message in the dmesg log when we're RO:
 673          */
 674         if (unlikely(!percpu_ref_tryget(&c->writes)))
 675                 return -EROFS;
 676
 677         tmp = kstrdup(buf, GFP_KERNEL);
 678         if (!tmp) {
 679                 ret = -ENOMEM;
 680                 goto err;
 681         }
 682
 683         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 684         kfree(tmp);
 685
 686         if (ret < 0)
 687                 goto err;
 688
 689         ret = bch2_opt_check_may_set(c, id, v);
 690         if (ret < 0)
 691                 goto err;
 692
 693         bch2_opt_set_sb(c, opt, v);
 694         bch2_opt_set_by_id(&c->opts, id, v);
 695
 696         if ((id == Opt_background_target ||
 697              id == Opt_background_compression) && v) {
 698                 bch2_rebalance_add_work(c, S64_MAX);
 699                 rebalance_wakeup(c);
 700         }
 701
 702         ret = size;
 703 err:
 704         percpu_ref_put(&c->writes);
 705         return ret;
 706 }
 707 SYSFS_OPS(bch2_fs_opts_dir);
 708
 709 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 710
 711 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 712 {
 713         const struct bch_option *i;
 714         int ret;
 715
 716         for (i = bch2_opt_table;
 717              i < bch2_opt_table + bch2_opts_nr;
 718              i++) {
 719                 if (!(i->flags & OPT_FS))
 720                         continue;
 721
 722                 ret = sysfs_create_file(kobj, &i->attr);
 723                 if (ret)
 724                         return ret;
 725         }
 726
 727         return 0;
 728 }
 729
 730 /* time stats */
 731
 732 SHOW(bch2_fs_time_stats)
 733 {
 734         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 735
 736 #define x(name)                                                         \
 737         if (attr == &sysfs_time_stat_##name)                            \
 738                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 739         BCH_TIME_STATS()
 740 #undef x
 741
 742         return 0;
 743 }
 744
 745 STORE(bch2_fs_time_stats)
 746 {
 747         return size;
 748 }
 749 SYSFS_OPS(bch2_fs_time_stats);
 750
 751 struct attribute *bch2_fs_time_stats_files[] = {
 752 #define x(name)                                         \
 753         &sysfs_time_stat_##name,
 754         BCH_TIME_STATS()
 755 #undef x
 756         NULL
 757 };
 758
 759 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 760 {
 761         struct bch_fs *c = ca->fs;
 762         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 763         unsigned i, nr[BCH_DATA_NR];
 764
 765         memset(nr, 0, sizeof(nr));
 766
 767         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 768                 nr[c->open_buckets[i].data_type]++;
 769
 770         prt_printf(out,
 771                "\t\t\t buckets\t sectors      fragmented\n"
 772                "capacity\t%16llu\n",
 773                ca->mi.nbuckets - ca->mi.first_bucket);
 774
 775         for (i = 0; i < BCH_DATA_NR; i++)
 776                 prt_printf(out, "%-16s%16llu%16llu%16llu\n",
 777                        bch2_data_types[i], stats.d[i].buckets,
 778                        stats.d[i].sectors, stats.d[i].fragmented);
 779
 780         prt_printf(out,
 781                "ec\t\t%16llu\n"
 782                "\n"
 783                "freelist_wait\t\t%s\n"
 784                "open buckets allocated\t%u\n"
 785                "open buckets this dev\t%u\n"
 786                "open buckets total\t%u\n"
 787                "open_buckets_wait\t%s\n"
 788                "open_buckets_btree\t%u\n"
 789                "open_buckets_user\t%u\n"
 790                "btree reserve cache\t%u\n",
 791                stats.buckets_ec,
 792                c->freelist_wait.list.first              ? "waiting" : "empty",
 793                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 794                ca->nr_open_buckets,
 795                OPEN_BUCKETS_COUNT,
 796                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 797                nr[BCH_DATA_btree],
 798                nr[BCH_DATA_user],
 799                c->btree_reserve_cache_nr);
 800 }
 801
 802 static const char * const bch2_rw[] = {
 803         "read",
 804         "write",
 805         NULL
 806 };
 807
 808 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 809 {
 810         int rw, i;
 811
 812         for (rw = 0; rw < 2; rw++) {
 813                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 814
 815                 for (i = 1; i < BCH_DATA_NR; i++)
 816                         prt_printf(out, "%-12s:%12llu\n",
 817                                bch2_data_types[i],
 818                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 819         }
 820 }
 821
 822 SHOW(bch2_dev)
 823 {
 824         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 825         struct bch_fs *c = ca->fs;
 826
 827         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 828
 829         sysfs_print(bucket_size,        bucket_bytes(ca));
 830         sysfs_print(first_bucket,       ca->mi.first_bucket);
 831         sysfs_print(nbuckets,           ca->mi.nbuckets);
 832         sysfs_print(durability,         ca->mi.durability);
 833         sysfs_print(discard,            ca->mi.discard);
 834
 835         if (attr == &sysfs_label) {
 836                 if (ca->mi.group) {
 837                         mutex_lock(&c->sb_lock);
 838                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 839                                                ca->mi.group - 1);
 840                         mutex_unlock(&c->sb_lock);
 841                 }
 842
 843                 prt_char(out, '\n');
 844         }
 845
 846         if (attr == &sysfs_has_data) {
 847                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 848                 prt_char(out, '\n');
 849         }
 850
 851         if (attr == &sysfs_state_rw) {
 852                 prt_string_option(out, bch2_member_states, ca->mi.state);
 853                 prt_char(out, '\n');
 854         }
 855
 856         if (attr == &sysfs_iodone)
 857                 dev_iodone_to_text(out, ca);
 858
 859         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 860         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 861
 862         if (attr == &sysfs_io_latency_stats_read)
 863                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 864
 865         if (attr == &sysfs_io_latency_stats_write)
 866                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 867
 868         sysfs_printf(congested,                 "%u%%",
 869                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 870                      * 100 / CONGESTED_MAX);
 871
 872         if (attr == &sysfs_alloc_debug)
 873                 dev_alloc_debug_to_text(out, ca);
 874
 875         return 0;
 876 }
 877
 878 STORE(bch2_dev)
 879 {
 880         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 881         struct bch_fs *c = ca->fs;
 882         struct bch_member *mi;
 883
 884         if (attr == &sysfs_discard) {
 885                 bool v = strtoul_or_return(buf);
 886
 887                 mutex_lock(&c->sb_lock);
 888                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 889
 890                 if (v != BCH_MEMBER_DISCARD(mi)) {
 891                         SET_BCH_MEMBER_DISCARD(mi, v);
 892                         bch2_write_super(c);
 893                 }
 894                 mutex_unlock(&c->sb_lock);
 895         }
 896
 897         if (attr == &sysfs_label) {
 898                 char *tmp;
 899                 int ret;
 900
 901                 tmp = kstrdup(buf, GFP_KERNEL);
 902                 if (!tmp)
 903                         return -ENOMEM;
 904
 905                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 906                 kfree(tmp);
 907                 if (ret)
 908                         return ret;
 909         }
 910
 911         return size;
 912 }
 913 SYSFS_OPS(bch2_dev);
 914
 915 struct attribute *bch2_dev_files[] = {
 916         &sysfs_uuid,
 917         &sysfs_bucket_size,
 918         &sysfs_first_bucket,
 919         &sysfs_nbuckets,
 920         &sysfs_durability,
 921
 922         /* settings: */
 923         &sysfs_discard,
 924         &sysfs_state_rw,
 925         &sysfs_label,
 926
 927         &sysfs_has_data,
 928         &sysfs_iodone,
 929
 930         &sysfs_io_latency_read,
 931         &sysfs_io_latency_write,
 932         &sysfs_io_latency_stats_read,
 933         &sysfs_io_latency_stats_write,
 934         &sysfs_congested,
 935
 936         /* debug: */
 937         &sysfs_alloc_debug,
 938         NULL
 939 };
 940
 941 #endif  /* _BCACHEFS_SYSFS_H_ */