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_op_data_progress);
 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 stats_to_text(struct printbuf *out, struct bch_fs *c,
 234                           struct bch_move_stats *stats)
 235 {
 236         pr_buf(out, "%s: data type %s btree_id %s position: ",
 237                 stats->name,
 238                 bch2_data_types[stats->data_type],
 239                 bch2_btree_ids[stats->btree_id]);
 240         bch2_bpos_to_text(out, stats->pos);
 241         pr_buf(out, "%s", "\n");
 242
 243         return 0;
 244 }
 245
 246 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 247 {
 248         long ret = 0;
 249         struct bch_move_stats *iter;
 250
 251         mutex_lock(&c->data_progress_lock);
 252
 253         if (list_empty(&c->data_progress_list))
 254                 pr_buf(out, "%s", "no progress to report\n");
 255         else
 256                 list_for_each_entry(iter, &c->data_progress_list, list) {
 257                         stats_to_text(out, c, iter);
 258                 }
 259
 260         mutex_unlock(&c->data_progress_lock);
 261         return ret;
 262 }
 263
 264 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 265 {
 266         struct btree_trans trans;
 267         struct btree_iter iter;
 268         struct bkey_s_c k;
 269         enum btree_id id;
 270         u64 nr_uncompressed_extents = 0,
 271             nr_compressed_extents = 0,
 272             nr_incompressible_extents = 0,
 273             uncompressed_sectors = 0,
 274             incompressible_sectors = 0,
 275             compressed_sectors_compressed = 0,
 276             compressed_sectors_uncompressed = 0;
 277         int ret;
 278
 279         if (!test_bit(BCH_FS_STARTED, &c->flags))
 280                 return -EPERM;
 281
 282         bch2_trans_init(&trans, c, 0, 0);
 283
 284         for (id = 0; id < BTREE_ID_NR; id++) {
 285                 if (!((1U << id) & BTREE_ID_HAS_PTRS))
 286                         continue;
 287
 288                 for_each_btree_key(&trans, iter, id, POS_MIN,
 289                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 290                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 291                         const union bch_extent_entry *entry;
 292                         struct extent_ptr_decoded p;
 293                         bool compressed = false, uncompressed = false, incompressible = false;
 294
 295                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 296                                 switch (p.crc.compression_type) {
 297                                 case BCH_COMPRESSION_TYPE_none:
 298                                         uncompressed = true;
 299                                         uncompressed_sectors += k.k->size;
 300                                         break;
 301                                 case BCH_COMPRESSION_TYPE_incompressible:
 302                                         incompressible = true;
 303                                         incompressible_sectors += k.k->size;
 304                                         break;
 305                                 default:
 306                                         compressed_sectors_compressed +=
 307                                                 p.crc.compressed_size;
 308                                         compressed_sectors_uncompressed +=
 309                                                 p.crc.uncompressed_size;
 310                                         compressed = true;
 311                                         break;
 312                                 }
 313                         }
 314
 315                         if (incompressible)
 316                                 nr_incompressible_extents++;
 317                         else if (uncompressed)
 318                                 nr_uncompressed_extents++;
 319                         else if (compressed)
 320                                 nr_compressed_extents++;
 321                 }
 322                 bch2_trans_iter_exit(&trans, &iter);
 323         }
 324
 325         bch2_trans_exit(&trans);
 326
 327         if (ret)
 328                 return ret;
 329
 330         pr_buf(out, "uncompressed:\n");
 331         pr_buf(out, "   nr extents:             %llu\n", nr_uncompressed_extents);
 332         pr_buf(out, "   size:                   ");
 333         bch2_hprint(out, uncompressed_sectors << 9);
 334         pr_buf(out, "\n");
 335
 336         pr_buf(out, "compressed:\n");
 337         pr_buf(out, "   nr extents:             %llu\n", nr_compressed_extents);
 338         pr_buf(out, "   compressed size:        ");
 339         bch2_hprint(out, compressed_sectors_compressed << 9);
 340         pr_buf(out, "\n");
 341         pr_buf(out, "   uncompressed size:      ");
 342         bch2_hprint(out, compressed_sectors_uncompressed << 9);
 343         pr_buf(out, "\n");
 344
 345         pr_buf(out, "incompressible:\n");
 346         pr_buf(out, "   nr extents:             %llu\n", nr_incompressible_extents);
 347         pr_buf(out, "   size:                   ");
 348         bch2_hprint(out, incompressible_sectors << 9);
 349         pr_buf(out, "\n");
 350         return 0;
 351 }
 352
 353 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 354 {
 355         pr_buf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 356         bch2_bpos_to_text(out, c->gc_gens_pos);
 357         pr_buf(out, "\n");
 358 }
 359
 360 SHOW(bch2_fs)
 361 {
 362         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 363         struct printbuf out = _PBUF(buf, PAGE_SIZE);
 364
 365         sysfs_print(minor,                      c->minor);
 366         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 367
 368         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 369         sysfs_hprint(btree_avg_write_size,      bch2_btree_avg_write_size(c));
 370
 371         sysfs_print(read_realloc_races,
 372                     atomic_long_read(&c->read_realloc_races));
 373         sysfs_print(extent_migrate_done,
 374                     atomic_long_read(&c->extent_migrate_done));
 375         sysfs_print(extent_migrate_raced,
 376                     atomic_long_read(&c->extent_migrate_raced));
 377
 378         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 379
 380         if (attr == &sysfs_gc_gens_pos) {
 381                 bch2_gc_gens_pos_to_text(&out, c);
 382                 return out.pos - buf;
 383         }
 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                 return out.pos - buf;
 396         }
 397
 398         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 399
 400         /* Debugging: */
 401
 402         if (attr == &sysfs_journal_debug) {
 403                 bch2_journal_debug_to_text(&out, &c->journal);
 404                 return out.pos - buf;
 405         }
 406
 407         if (attr == &sysfs_journal_pins) {
 408                 bch2_journal_pins_to_text(&out, &c->journal);
 409                 return out.pos - buf;
 410         }
 411
 412         if (attr == &sysfs_btree_updates) {
 413                 bch2_btree_updates_to_text(&out, c);
 414                 return out.pos - buf;
 415         }
 416
 417         if (attr == &sysfs_dirty_btree_nodes) {
 418                 bch2_dirty_btree_nodes_to_text(&out, c);
 419                 return out.pos - buf;
 420         }
 421
 422         if (attr == &sysfs_btree_cache) {
 423                 bch2_btree_cache_to_text(&out, c);
 424                 return out.pos - buf;
 425         }
 426
 427         if (attr == &sysfs_btree_key_cache) {
 428                 bch2_btree_key_cache_to_text(&out, &c->btree_key_cache);
 429                 return out.pos - buf;
 430         }
 431
 432         if (attr == &sysfs_btree_transactions) {
 433                 bch2_btree_trans_to_text(&out, c);
 434                 return out.pos - buf;
 435         }
 436
 437         if (attr == &sysfs_stripes_heap) {
 438                 bch2_stripes_heap_to_text(&out, c);
 439                 return out.pos - buf;
 440         }
 441
 442         if (attr == &sysfs_open_buckets) {
 443                 bch2_open_buckets_to_text(&out, c);
 444                 return out.pos - buf;
 445         }
 446
 447         if (attr == &sysfs_compression_stats) {
 448                 bch2_compression_stats_to_text(&out, c);
 449                 return out.pos - buf;
 450         }
 451
 452         if (attr == &sysfs_new_stripes) {
 453                 bch2_new_stripes_to_text(&out, c);
 454                 return out.pos - buf;
 455         }
 456
 457         if (attr == &sysfs_io_timers_read) {
 458                 bch2_io_timers_to_text(&out, &c->io_clock[READ]);
 459                 return out.pos - buf;
 460         }
 461         if (attr == &sysfs_io_timers_write) {
 462                 bch2_io_timers_to_text(&out, &c->io_clock[WRITE]);
 463                 return out.pos - buf;
 464         }
 465
 466         if (attr == &sysfs_data_op_data_progress) {
 467                 data_progress_to_text(&out, c);
 468                 return out.pos - buf;
 469         }
 470
 471         return 0;
 472 }
 473
 474 STORE(bch2_fs)
 475 {
 476         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 477
 478         if (attr == &sysfs_btree_gc_periodic) {
 479                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 480                         ?: (ssize_t) size;
 481
 482                 wake_up_process(c->gc_thread);
 483                 return ret;
 484         }
 485
 486         if (attr == &sysfs_copy_gc_enabled) {
 487                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 488                         ?: (ssize_t) size;
 489
 490                 if (c->copygc_thread)
 491                         wake_up_process(c->copygc_thread);
 492                 return ret;
 493         }
 494
 495         if (attr == &sysfs_rebalance_enabled) {
 496                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 497                         ?: (ssize_t) size;
 498
 499                 rebalance_wakeup(c);
 500                 return ret;
 501         }
 502
 503         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 504
 505         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 506
 507         /* Debugging: */
 508
 509         if (!test_bit(BCH_FS_STARTED, &c->flags))
 510                 return -EPERM;
 511
 512         /* Debugging: */
 513
 514         if (attr == &sysfs_trigger_gc) {
 515                 /*
 516                  * Full gc is currently incompatible with btree key cache:
 517                  */
 518 #if 0
 519                 down_read(&c->state_lock);
 520                 bch2_gc(c, false, false);
 521                 up_read(&c->state_lock);
 522 #else
 523                 bch2_gc_gens(c);
 524 #endif
 525         }
 526
 527         if (attr == &sysfs_prune_cache) {
 528                 struct shrink_control sc;
 529
 530                 sc.gfp_mask = GFP_KERNEL;
 531                 sc.nr_to_scan = strtoul_or_return(buf);
 532                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 533         }
 534
 535 #ifdef CONFIG_BCACHEFS_TESTS
 536         if (attr == &sysfs_perf_test) {
 537                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 538                 char *test              = strsep(&p, " \t\n");
 539                 char *nr_str            = strsep(&p, " \t\n");
 540                 char *threads_str       = strsep(&p, " \t\n");
 541                 unsigned threads;
 542                 u64 nr;
 543                 int ret = -EINVAL;
 544
 545                 if (threads_str &&
 546                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 547                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 548                         ret = bch2_btree_perf_test(c, test, nr, threads);
 549                 kfree(tmp);
 550
 551                 if (ret)
 552                         size = ret;
 553         }
 554 #endif
 555         return size;
 556 }
 557 SYSFS_OPS(bch2_fs);
 558
 559 struct attribute *bch2_fs_files[] = {
 560         &sysfs_minor,
 561         &sysfs_btree_cache_size,
 562         &sysfs_btree_avg_write_size,
 563
 564         &sysfs_promote_whole_extents,
 565
 566         &sysfs_compression_stats,
 567
 568 #ifdef CONFIG_BCACHEFS_TESTS
 569         &sysfs_perf_test,
 570 #endif
 571         NULL
 572 };
 573
 574 /* internal dir - just a wrapper */
 575
 576 SHOW(bch2_fs_internal)
 577 {
 578         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 579         return bch2_fs_show(&c->kobj, attr, buf);
 580 }
 581
 582 STORE(bch2_fs_internal)
 583 {
 584         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 585         return bch2_fs_store(&c->kobj, attr, buf, size);
 586 }
 587 SYSFS_OPS(bch2_fs_internal);
 588
 589 struct attribute *bch2_fs_internal_files[] = {
 590         &sysfs_journal_debug,
 591         &sysfs_journal_pins,
 592         &sysfs_btree_updates,
 593         &sysfs_dirty_btree_nodes,
 594         &sysfs_btree_cache,
 595         &sysfs_btree_key_cache,
 596         &sysfs_btree_transactions,
 597         &sysfs_new_stripes,
 598         &sysfs_stripes_heap,
 599         &sysfs_open_buckets,
 600         &sysfs_io_timers_read,
 601         &sysfs_io_timers_write,
 602
 603         &sysfs_trigger_gc,
 604         &sysfs_prune_cache,
 605
 606         &sysfs_read_realloc_races,
 607         &sysfs_extent_migrate_done,
 608         &sysfs_extent_migrate_raced,
 609
 610         &sysfs_gc_gens_pos,
 611
 612         &sysfs_copy_gc_enabled,
 613         &sysfs_copy_gc_wait,
 614
 615         &sysfs_rebalance_enabled,
 616         &sysfs_rebalance_work,
 617         sysfs_pd_controller_files(rebalance),
 618
 619         &sysfs_data_op_data_progress,
 620
 621         &sysfs_internal_uuid,
 622         NULL
 623 };
 624
 625 /* options */
 626
 627 SHOW(bch2_fs_opts_dir)
 628 {
 629         struct printbuf out = _PBUF(buf, PAGE_SIZE);
 630         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 631         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 632         int id = opt - bch2_opt_table;
 633         u64 v = bch2_opt_get_by_id(&c->opts, id);
 634
 635         bch2_opt_to_text(&out, c, opt, v, OPT_SHOW_FULL_LIST);
 636         pr_buf(&out, "\n");
 637
 638         return out.pos - buf;
 639 }
 640
 641 STORE(bch2_fs_opts_dir)
 642 {
 643         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 644         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 645         int ret, id = opt - bch2_opt_table;
 646         char *tmp;
 647         u64 v;
 648
 649         tmp = kstrdup(buf, GFP_KERNEL);
 650         if (!tmp)
 651                 return -ENOMEM;
 652
 653         ret = bch2_opt_parse(c, NULL, opt, strim(tmp), &v);
 654         kfree(tmp);
 655
 656         if (ret < 0)
 657                 return ret;
 658
 659         ret = bch2_opt_check_may_set(c, id, v);
 660         if (ret < 0)
 661                 return ret;
 662
 663         bch2_opt_set_sb(c, opt, v);
 664         bch2_opt_set_by_id(&c->opts, id, v);
 665
 666         if ((id == Opt_background_target ||
 667              id == Opt_background_compression) && v) {
 668                 bch2_rebalance_add_work(c, S64_MAX);
 669                 rebalance_wakeup(c);
 670         }
 671
 672         return size;
 673 }
 674 SYSFS_OPS(bch2_fs_opts_dir);
 675
 676 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 677
 678 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 679 {
 680         const struct bch_option *i;
 681         int ret;
 682
 683         for (i = bch2_opt_table;
 684              i < bch2_opt_table + bch2_opts_nr;
 685              i++) {
 686                 if (!(i->flags & OPT_FS))
 687                         continue;
 688
 689                 ret = sysfs_create_file(kobj, &i->attr);
 690                 if (ret)
 691                         return ret;
 692         }
 693
 694         return 0;
 695 }
 696
 697 /* time stats */
 698
 699 SHOW(bch2_fs_time_stats)
 700 {
 701         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 702         struct printbuf out = _PBUF(buf, PAGE_SIZE);
 703
 704 #define x(name)                                                         \
 705         if (attr == &sysfs_time_stat_##name) {                          \
 706                 bch2_time_stats_to_text(&out, &c->times[BCH_TIME_##name]);\
 707                 return out.pos - buf;                                   \
 708         }
 709         BCH_TIME_STATS()
 710 #undef x
 711
 712         return 0;
 713 }
 714
 715 STORE(bch2_fs_time_stats)
 716 {
 717         return size;
 718 }
 719 SYSFS_OPS(bch2_fs_time_stats);
 720
 721 struct attribute *bch2_fs_time_stats_files[] = {
 722 #define x(name)                                         \
 723         &sysfs_time_stat_##name,
 724         BCH_TIME_STATS()
 725 #undef x
 726         NULL
 727 };
 728
 729 static void reserve_stats_to_text(struct printbuf *out, struct bch_dev *ca)
 730 {
 731         enum alloc_reserve i;
 732
 733         spin_lock(&ca->fs->freelist_lock);
 734
 735         pr_buf(out, "free_inc:\t%zu\t%zu\n",
 736                fifo_used(&ca->free_inc),
 737                ca->free_inc.size);
 738
 739         for (i = 0; i < RESERVE_NR; i++)
 740                 pr_buf(out, "free[%u]:\t%zu\t%zu\n", i,
 741                        fifo_used(&ca->free[i]),
 742                        ca->free[i].size);
 743
 744         spin_unlock(&ca->fs->freelist_lock);
 745 }
 746
 747 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 748 {
 749         struct bch_fs *c = ca->fs;
 750         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 751         unsigned i, nr[BCH_DATA_NR];
 752
 753         memset(nr, 0, sizeof(nr));
 754
 755         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 756                 nr[c->open_buckets[i].data_type]++;
 757
 758         pr_buf(out,
 759                "\t\t buckets\t sectors      fragmented\n"
 760                "capacity%16llu\n",
 761                ca->mi.nbuckets - ca->mi.first_bucket);
 762
 763         for (i = 1; i < BCH_DATA_NR; i++)
 764                 pr_buf(out, "%-8s%16llu%16llu%16llu\n",
 765                        bch2_data_types[i], stats.d[i].buckets,
 766                        stats.d[i].sectors, stats.d[i].fragmented);
 767
 768         pr_buf(out,
 769                "ec\t%16llu\n"
 770                "available%15llu\n"
 771                "\n"
 772                "free_inc\t\t%zu/%zu\n"
 773                "free[RESERVE_MOVINGGC]\t%zu/%zu\n"
 774                "free[RESERVE_NONE]\t%zu/%zu\n"
 775                "freelist_wait\t\t%s\n"
 776                "open buckets allocated\t%u\n"
 777                "open buckets this dev\t%u\n"
 778                "open buckets total\t%u\n"
 779                "open_buckets_wait\t%s\n"
 780                "open_buckets_btree\t%u\n"
 781                "open_buckets_user\t%u\n"
 782                "btree reserve cache\t%u\n"
 783                "thread state:\t\t%s\n",
 784                stats.buckets_ec,
 785                __dev_buckets_available(ca, stats),
 786                fifo_used(&ca->free_inc),                ca->free_inc.size,
 787                fifo_used(&ca->free[RESERVE_MOVINGGC]),  ca->free[RESERVE_MOVINGGC].size,
 788                fifo_used(&ca->free[RESERVE_NONE]),      ca->free[RESERVE_NONE].size,
 789                c->freelist_wait.list.first              ? "waiting" : "empty",
 790                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 791                ca->nr_open_buckets,
 792                OPEN_BUCKETS_COUNT,
 793                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 794                nr[BCH_DATA_btree],
 795                nr[BCH_DATA_user],
 796                c->btree_reserve_cache_nr,
 797                bch2_allocator_states[ca->allocator_state]);
 798 }
 799
 800 static const char * const bch2_rw[] = {
 801         "read",
 802         "write",
 803         NULL
 804 };
 805
 806 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 807 {
 808         int rw, i;
 809
 810         for (rw = 0; rw < 2; rw++) {
 811                 pr_buf(out, "%s:\n", bch2_rw[rw]);
 812
 813                 for (i = 1; i < BCH_DATA_NR; i++)
 814                         pr_buf(out, "%-12s:%12llu\n",
 815                                bch2_data_types[i],
 816                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 817         }
 818 }
 819
 820 SHOW(bch2_dev)
 821 {
 822         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 823         struct bch_fs *c = ca->fs;
 824         struct printbuf out = _PBUF(buf, PAGE_SIZE);
 825
 826         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 827
 828         sysfs_print(bucket_size,        bucket_bytes(ca));
 829         sysfs_print(first_bucket,       ca->mi.first_bucket);
 830         sysfs_print(nbuckets,           ca->mi.nbuckets);
 831         sysfs_print(durability,         ca->mi.durability);
 832         sysfs_print(discard,            ca->mi.discard);
 833
 834         if (attr == &sysfs_label) {
 835                 if (ca->mi.group) {
 836                         mutex_lock(&c->sb_lock);
 837                         bch2_disk_path_to_text(&out, &c->disk_sb,
 838                                                ca->mi.group - 1);
 839                         mutex_unlock(&c->sb_lock);
 840                 }
 841
 842                 pr_buf(&out, "\n");
 843                 return out.pos - buf;
 844         }
 845
 846         if (attr == &sysfs_has_data) {
 847                 bch2_flags_to_text(&out, bch2_data_types,
 848                                    bch2_dev_has_data(c, ca));
 849                 pr_buf(&out, "\n");
 850                 return out.pos - buf;
 851         }
 852
 853         if (attr == &sysfs_state_rw) {
 854                 bch2_string_opt_to_text(&out, bch2_member_states,
 855                                         ca->mi.state);
 856                 pr_buf(&out, "\n");
 857                 return out.pos - buf;
 858         }
 859
 860         if (attr == &sysfs_iodone) {
 861                 dev_iodone_to_text(&out, ca);
 862                 return out.pos - buf;
 863         }
 864
 865         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 866         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 867
 868         if (attr == &sysfs_io_latency_stats_read) {
 869                 bch2_time_stats_to_text(&out, &ca->io_latency[READ]);
 870                 return out.pos - buf;
 871         }
 872         if (attr == &sysfs_io_latency_stats_write) {
 873                 bch2_time_stats_to_text(&out, &ca->io_latency[WRITE]);
 874                 return out.pos - buf;
 875         }
 876
 877         sysfs_printf(congested,                 "%u%%",
 878                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 879                      * 100 / CONGESTED_MAX);
 880
 881         if (attr == &sysfs_reserve_stats) {
 882                 reserve_stats_to_text(&out, ca);
 883                 return out.pos - buf;
 884         }
 885         if (attr == &sysfs_alloc_debug) {
 886                 dev_alloc_debug_to_text(&out, ca);
 887                 return out.pos - buf;
 888         }
 889
 890         return 0;
 891 }
 892
 893 STORE(bch2_dev)
 894 {
 895         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 896         struct bch_fs *c = ca->fs;
 897         struct bch_member *mi;
 898
 899         if (attr == &sysfs_discard) {
 900                 bool v = strtoul_or_return(buf);
 901
 902                 mutex_lock(&c->sb_lock);
 903                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 904
 905                 if (v != BCH_MEMBER_DISCARD(mi)) {
 906                         SET_BCH_MEMBER_DISCARD(mi, v);
 907                         bch2_write_super(c);
 908                 }
 909                 mutex_unlock(&c->sb_lock);
 910         }
 911
 912         if (attr == &sysfs_label) {
 913                 char *tmp;
 914                 int ret;
 915
 916                 tmp = kstrdup(buf, GFP_KERNEL);
 917                 if (!tmp)
 918                         return -ENOMEM;
 919
 920                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 921                 kfree(tmp);
 922                 if (ret)
 923                         return ret;
 924         }
 925
 926         if (attr == &sysfs_wake_allocator)
 927                 bch2_wake_allocator(ca);
 928
 929         return size;
 930 }
 931 SYSFS_OPS(bch2_dev);
 932
 933 struct attribute *bch2_dev_files[] = {
 934         &sysfs_uuid,
 935         &sysfs_bucket_size,
 936         &sysfs_first_bucket,
 937         &sysfs_nbuckets,
 938         &sysfs_durability,
 939
 940         /* settings: */
 941         &sysfs_discard,
 942         &sysfs_state_rw,
 943         &sysfs_label,
 944
 945         &sysfs_has_data,
 946         &sysfs_iodone,
 947
 948         &sysfs_io_latency_read,
 949         &sysfs_io_latency_write,
 950         &sysfs_io_latency_stats_read,
 951         &sysfs_io_latency_stats_write,
 952         &sysfs_congested,
 953
 954         &sysfs_reserve_stats,
 955
 956         /* debug: */
 957         &sysfs_alloc_debug,
 958         &sysfs_wake_allocator,
 959         NULL
 960 };
 961
 962 #endif  /* _BCACHEFS_SYSFS_H_ */