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