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 const 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 (out.pos && out.buf[out.pos - 1] != '\n')                    \
  59                 pr_newline(&out);                                       \
  60                                                                         \
  61         if (!ret && out.allocation_failure)                             \
  62                 ret = -ENOMEM;                                          \
  63                                                                         \
  64         if (!ret) {                                                     \
  65                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  66                 memcpy(buf, out.buf, ret);                              \
  67         }                                                               \
  68         printbuf_exit(&out);                                            \
  69         return ret;                                                     \
  70 }                                                                       \
  71                                                                         \
  72 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  73                               struct attribute *attr)
  74
  75 #define STORE(fn)                                                       \
  76 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  77                             const char *buf, size_t size)               \
  78
  79 #define __sysfs_attribute(_name, _mode)                                 \
  80         static struct attribute sysfs_##_name =                         \
  81                 { .name = #_name, .mode = _mode }
  82
  83 #define write_attribute(n)      __sysfs_attribute(n, S_IWUSR)
  84 #define read_attribute(n)       __sysfs_attribute(n, S_IRUGO)
  85 #define rw_attribute(n)         __sysfs_attribute(n, S_IRUGO|S_IWUSR)
  86
  87 #define sysfs_printf(file, fmt, ...)                                    \
  88 do {                                                                    \
  89         if (attr == &sysfs_ ## file)                                    \
  90                 pr_buf(out, fmt "\n", __VA_ARGS__);                     \
  91 } while (0)
  92
  93 #define sysfs_print(file, var)                                          \
  94 do {                                                                    \
  95         if (attr == &sysfs_ ## file)                                    \
  96                 snprint(out, var);                                      \
  97 } while (0)
  98
  99 #define sysfs_hprint(file, val)                                         \
 100 do {                                                                    \
 101         if (attr == &sysfs_ ## file)                                    \
 102                 bch2_hprint(out, val);                                  \
 103 } while (0)
 104
 105 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 106 #define var_print(_var)         sysfs_print(_var, var(_var))
 107 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 108
 109 #define sysfs_strtoul(file, var)                                        \
 110 do {                                                                    \
 111         if (attr == &sysfs_ ## file)                                    \
 112                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 113 } while (0)
 114
 115 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 116 do {                                                                    \
 117         if (attr == &sysfs_ ## file)                                    \
 118                 return strtoul_safe_clamp(buf, var, min, max)           \
 119                         ?: (ssize_t) size;                              \
 120 } while (0)
 121
 122 #define strtoul_or_return(cp)                                           \
 123 ({                                                                      \
 124         unsigned long _v;                                               \
 125         int _r = kstrtoul(cp, 10, &_v);                                 \
 126         if (_r)                                                         \
 127                 return _r;                                              \
 128         _v;                                                             \
 129 })
 130
 131 #define strtoul_restrict_or_return(cp, min, max)                        \
 132 ({                                                                      \
 133         unsigned long __v = 0;                                          \
 134         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 135         if (_r)                                                         \
 136                 return _r;                                              \
 137         __v;                                                            \
 138 })
 139
 140 #define strtoi_h_or_return(cp)                                          \
 141 ({                                                                      \
 142         u64 _v;                                                         \
 143         int _r = strtoi_h(cp, &_v);                                     \
 144         if (_r)                                                         \
 145                 return _r;                                              \
 146         _v;                                                             \
 147 })
 148
 149 #define sysfs_hatoi(file, var)                                          \
 150 do {                                                                    \
 151         if (attr == &sysfs_ ## file)                                    \
 152                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 153 } while (0)
 154
 155 write_attribute(trigger_gc);
 156 write_attribute(trigger_discards);
 157 write_attribute(prune_cache);
 158 rw_attribute(btree_gc_periodic);
 159 rw_attribute(gc_gens_pos);
 160
 161 read_attribute(uuid);
 162 read_attribute(minor);
 163 read_attribute(bucket_size);
 164 read_attribute(first_bucket);
 165 read_attribute(nbuckets);
 166 read_attribute(durability);
 167 read_attribute(iodone);
 168
 169 read_attribute(io_latency_read);
 170 read_attribute(io_latency_write);
 171 read_attribute(io_latency_stats_read);
 172 read_attribute(io_latency_stats_write);
 173 read_attribute(congested);
 174
 175 read_attribute(btree_avg_write_size);
 176
 177 read_attribute(btree_cache_size);
 178 read_attribute(compression_stats);
 179 read_attribute(journal_debug);
 180 read_attribute(btree_updates);
 181 read_attribute(btree_cache);
 182 read_attribute(btree_key_cache);
 183 read_attribute(btree_transactions);
 184 read_attribute(stripes_heap);
 185 read_attribute(open_buckets);
 186
 187 read_attribute(internal_uuid);
 188
 189 read_attribute(has_data);
 190 read_attribute(alloc_debug);
 191
 192 read_attribute(read_realloc_races);
 193 read_attribute(extent_migrate_done);
 194 read_attribute(extent_migrate_raced);
 195 read_attribute(bucket_alloc_fail);
 196
 197 #define x(t, n, ...) read_attribute(t);
 198 BCH_PERSISTENT_COUNTERS()
 199 #undef x
 200
 201 rw_attribute(discard);
 202 rw_attribute(label);
 203
 204 rw_attribute(copy_gc_enabled);
 205 read_attribute(copy_gc_wait);
 206
 207 rw_attribute(rebalance_enabled);
 208 sysfs_pd_controller_attribute(rebalance);
 209 read_attribute(rebalance_work);
 210 rw_attribute(promote_whole_extents);
 211
 212 read_attribute(new_stripes);
 213
 214 read_attribute(io_timers_read);
 215 read_attribute(io_timers_write);
 216
 217 read_attribute(data_jobs);
 218
 219 #ifdef CONFIG_BCACHEFS_TESTS
 220 write_attribute(perf_test);
 221 #endif /* CONFIG_BCACHEFS_TESTS */
 222
 223 #define x(_name)                                                \
 224         static struct attribute sysfs_time_stat_##_name =               \
 225                 { .name = #_name, .mode = S_IRUGO };
 226         BCH_TIME_STATS()
 227 #undef x
 228
 229 static struct attribute sysfs_state_rw = {
 230         .name = "state",
 231         .mode = S_IRUGO
 232 };
 233
 234 static size_t bch2_btree_cache_size(struct bch_fs *c)
 235 {
 236         size_t ret = 0;
 237         struct btree *b;
 238
 239         mutex_lock(&c->btree_cache.lock);
 240         list_for_each_entry(b, &c->btree_cache.live, list)
 241                 ret += btree_bytes(c);
 242
 243         mutex_unlock(&c->btree_cache.lock);
 244         return ret;
 245 }
 246
 247 static size_t bch2_btree_avg_write_size(struct bch_fs *c)
 248 {
 249         u64 nr = atomic64_read(&c->btree_writes_nr);
 250         u64 sectors = atomic64_read(&c->btree_writes_sectors);
 251
 252         return nr ? div64_u64(sectors, nr) : 0;
 253 }
 254
 255 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 256 {
 257         long ret = 0;
 258         struct bch_move_stats *stats;
 259
 260         mutex_lock(&c->data_progress_lock);
 261         list_for_each_entry(stats, &c->data_progress_list, list) {
 262                 pr_buf(out, "%s: data type %s btree_id %s position: ",
 263                        stats->name,
 264                        bch2_data_types[stats->data_type],
 265                        bch2_btree_ids[stats->btree_id]);
 266                 bch2_bpos_to_text(out, stats->pos);
 267                 pr_buf(out, "%s", "\n");
 268         }
 269
 270         mutex_unlock(&c->data_progress_lock);
 271         return ret;
 272 }
 273
 274 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 275 {
 276         struct btree_trans trans;
 277         struct btree_iter iter;
 278         struct bkey_s_c k;
 279         enum btree_id id;
 280         u64 nr_uncompressed_extents = 0,
 281             nr_compressed_extents = 0,
 282             nr_incompressible_extents = 0,
 283             uncompressed_sectors = 0,
 284             incompressible_sectors = 0,
 285             compressed_sectors_compressed = 0,
 286             compressed_sectors_uncompressed = 0;
 287         int ret;
 288
 289         if (!test_bit(BCH_FS_STARTED, &c->flags))
 290                 return -EPERM;
 291
 292         bch2_trans_init(&trans, c, 0, 0);
 293
 294         for (id = 0; id < BTREE_ID_NR; id++) {
 295                 if (!((1U << id) & BTREE_ID_HAS_PTRS))
 296                         continue;
 297
 298                 for_each_btree_key(&trans, iter, id, POS_MIN,
 299                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 300                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 301                         const union bch_extent_entry *entry;
 302                         struct extent_ptr_decoded p;
 303                         bool compressed = false, uncompressed = false, incompressible = false;
 304
 305                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 306                                 switch (p.crc.compression_type) {
 307                                 case BCH_COMPRESSION_TYPE_none:
 308                                         uncompressed = true;
 309                                         uncompressed_sectors += k.k->size;
 310                                         break;
 311                                 case BCH_COMPRESSION_TYPE_incompressible:
 312                                         incompressible = true;
 313                                         incompressible_sectors += k.k->size;
 314                                         break;
 315                                 default:
 316                                         compressed_sectors_compressed +=
 317                                                 p.crc.compressed_size;
 318                                         compressed_sectors_uncompressed +=
 319                                                 p.crc.uncompressed_size;
 320                                         compressed = true;
 321                                         break;
 322                                 }
 323                         }
 324
 325                         if (incompressible)
 326                                 nr_incompressible_extents++;
 327                         else if (uncompressed)
 328                                 nr_uncompressed_extents++;
 329                         else if (compressed)
 330                                 nr_compressed_extents++;
 331                 }
 332                 bch2_trans_iter_exit(&trans, &iter);
 333         }
 334
 335         bch2_trans_exit(&trans);
 336
 337         if (ret)
 338                 return ret;
 339
 340         pr_buf(out, "uncompressed:\n");
 341         pr_buf(out, "   nr extents:             %llu\n", nr_uncompressed_extents);
 342         pr_buf(out, "   size:                   ");
 343         bch2_hprint(out, uncompressed_sectors << 9);
 344         pr_buf(out, "\n");
 345
 346         pr_buf(out, "compressed:\n");
 347         pr_buf(out, "   nr extents:             %llu\n", nr_compressed_extents);
 348         pr_buf(out, "   compressed size:        ");
 349         bch2_hprint(out, compressed_sectors_compressed << 9);
 350         pr_buf(out, "\n");
 351         pr_buf(out, "   uncompressed size:      ");
 352         bch2_hprint(out, compressed_sectors_uncompressed << 9);
 353         pr_buf(out, "\n");
 354
 355         pr_buf(out, "incompressible:\n");
 356         pr_buf(out, "   nr extents:             %llu\n", nr_incompressible_extents);
 357         pr_buf(out, "   size:                   ");
 358         bch2_hprint(out, incompressible_sectors << 9);
 359         pr_buf(out, "\n");
 360         return 0;
 361 }
 362
 363 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 364 {
 365         pr_buf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 366         bch2_bpos_to_text(out, c->gc_gens_pos);
 367         pr_buf(out, "\n");
 368 }
 369
 370 SHOW(bch2_fs)
 371 {
 372         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 373
 374         sysfs_print(minor,                      c->minor);
 375         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 376
 377         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 378         sysfs_hprint(btree_avg_write_size,      bch2_btree_avg_write_size(c));
 379
 380         sysfs_print(read_realloc_races,
 381                     atomic_long_read(&c->read_realloc_races));
 382         sysfs_print(extent_migrate_done,
 383                     atomic_long_read(&c->extent_migrate_done));
 384         sysfs_print(extent_migrate_raced,
 385                     atomic_long_read(&c->extent_migrate_raced));
 386         sysfs_print(bucket_alloc_fail,
 387                     atomic_long_read(&c->bucket_alloc_fail));
 388
 389         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 390
 391         if (attr == &sysfs_gc_gens_pos)
 392                 bch2_gc_gens_pos_to_text(out, c);
 393
 394         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 395
 396         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 397         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 398         sysfs_hprint(copy_gc_wait,
 399                      max(0LL, c->copygc_wait -
 400                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 401
 402         if (attr == &sysfs_rebalance_work)
 403                 bch2_rebalance_work_to_text(out, c);
 404
 405         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 406
 407         /* Debugging: */
 408
 409         if (attr == &sysfs_journal_debug)
 410                 bch2_journal_debug_to_text(out, &c->journal);
 411
 412         if (attr == &sysfs_btree_updates)
 413                 bch2_btree_updates_to_text(out, c);
 414
 415         if (attr == &sysfs_btree_cache)
 416                 bch2_btree_cache_to_text(out, c);
 417
 418         if (attr == &sysfs_btree_key_cache)
 419                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 420
 421         if (attr == &sysfs_btree_transactions)
 422                 bch2_btree_trans_to_text(out, c);
 423
 424         if (attr == &sysfs_stripes_heap)
 425                 bch2_stripes_heap_to_text(out, c);
 426
 427         if (attr == &sysfs_open_buckets)
 428                 bch2_open_buckets_to_text(out, c);
 429
 430         if (attr == &sysfs_compression_stats)
 431                 bch2_compression_stats_to_text(out, c);
 432
 433         if (attr == &sysfs_new_stripes)
 434                 bch2_new_stripes_to_text(out, c);
 435
 436         if (attr == &sysfs_io_timers_read)
 437                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 438
 439         if (attr == &sysfs_io_timers_write)
 440                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 441
 442         if (attr == &sysfs_data_jobs)
 443                 data_progress_to_text(out, c);
 444
 445         return 0;
 446 }
 447
 448 STORE(bch2_fs)
 449 {
 450         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 451
 452         if (attr == &sysfs_btree_gc_periodic) {
 453                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 454                         ?: (ssize_t) size;
 455
 456                 wake_up_process(c->gc_thread);
 457                 return ret;
 458         }
 459
 460         if (attr == &sysfs_copy_gc_enabled) {
 461                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 462                         ?: (ssize_t) size;
 463
 464                 if (c->copygc_thread)
 465                         wake_up_process(c->copygc_thread);
 466                 return ret;
 467         }
 468
 469         if (attr == &sysfs_rebalance_enabled) {
 470                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 471                         ?: (ssize_t) size;
 472
 473                 rebalance_wakeup(c);
 474                 return ret;
 475         }
 476
 477         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 478
 479         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 480
 481         /* Debugging: */
 482
 483         if (!test_bit(BCH_FS_STARTED, &c->flags))
 484                 return -EPERM;
 485
 486         /* Debugging: */
 487
 488         if (!test_bit(BCH_FS_RW, &c->flags))
 489                 return -EROFS;
 490
 491         if (attr == &sysfs_prune_cache) {
 492                 struct shrink_control sc;
 493
 494                 sc.gfp_mask = GFP_KERNEL;
 495                 sc.nr_to_scan = strtoul_or_return(buf);
 496                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 497         }
 498
 499         if (attr == &sysfs_trigger_gc) {
 500                 /*
 501                  * Full gc is currently incompatible with btree key cache:
 502                  */
 503 #if 0
 504                 down_read(&c->state_lock);
 505                 bch2_gc(c, false, false);
 506                 up_read(&c->state_lock);
 507 #else
 508                 bch2_gc_gens(c);
 509 #endif
 510         }
 511
 512         if (attr == &sysfs_trigger_discards)
 513                 bch2_do_discards(c);
 514
 515 #ifdef CONFIG_BCACHEFS_TESTS
 516         if (attr == &sysfs_perf_test) {
 517                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 518                 char *test              = strsep(&p, " \t\n");
 519                 char *nr_str            = strsep(&p, " \t\n");
 520                 char *threads_str       = strsep(&p, " \t\n");
 521                 unsigned threads;
 522                 u64 nr;
 523                 int ret = -EINVAL;
 524
 525                 if (threads_str &&
 526                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 527                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 528                         ret = bch2_btree_perf_test(c, test, nr, threads);
 529                 kfree(tmp);
 530
 531                 if (ret)
 532                         size = ret;
 533         }
 534 #endif
 535         return size;
 536 }
 537 SYSFS_OPS(bch2_fs);
 538
 539 struct attribute *bch2_fs_files[] = {
 540         &sysfs_minor,
 541         &sysfs_btree_cache_size,
 542         &sysfs_btree_avg_write_size,
 543
 544         &sysfs_promote_whole_extents,
 545
 546         &sysfs_compression_stats,
 547
 548 #ifdef CONFIG_BCACHEFS_TESTS
 549         &sysfs_perf_test,
 550 #endif
 551         NULL
 552 };
 553
 554 /* counters dir */
 555
 556 SHOW(bch2_fs_counters)
 557 {
 558         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 559         u64 counter = 0;
 560         u64 counter_since_mount = 0;
 561
 562         out->tabstops[0] = 32;
 563         #define x(t, ...) \
 564                 if (attr == &sysfs_##t) {                                       \
 565                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 566                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 567                         pr_buf(out, "since mount:");                            \
 568                         pr_tab(out);                                            \
 569                         bch2_hprint(out, counter_since_mount << 9);             \
 570                         pr_newline(out);                                        \
 571                                                                                 \
 572                         pr_buf(out, "since filesystem creation:");              \
 573                         pr_tab(out);                                            \
 574                         bch2_hprint(out, counter << 9);                         \
 575                         pr_newline(out);                                        \
 576                 }
 577         BCH_PERSISTENT_COUNTERS()
 578         #undef x
 579         return 0;
 580 }
 581
 582 STORE(bch2_fs_counters) {
 583         return 0;
 584 }
 585
 586 SYSFS_OPS(bch2_fs_counters);
 587
 588 struct attribute *bch2_fs_counters_files[] = {
 589 #define x(t, ...) \
 590         &sysfs_##t,
 591         BCH_PERSISTENT_COUNTERS()
 592 #undef x
 593         NULL
 594 };
 595 /* internal dir - just a wrapper */
 596
 597 SHOW(bch2_fs_internal)
 598 {
 599         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 600         return bch2_fs_to_text(out, &c->kobj, attr);
 601 }
 602
 603 STORE(bch2_fs_internal)
 604 {
 605         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 606         return bch2_fs_store(&c->kobj, attr, buf, size);
 607 }
 608 SYSFS_OPS(bch2_fs_internal);
 609
 610 struct attribute *bch2_fs_internal_files[] = {
 611         &sysfs_journal_debug,
 612         &sysfs_btree_updates,
 613         &sysfs_btree_cache,
 614         &sysfs_btree_key_cache,
 615         &sysfs_btree_transactions,
 616         &sysfs_new_stripes,
 617         &sysfs_stripes_heap,
 618         &sysfs_open_buckets,
 619         &sysfs_io_timers_read,
 620         &sysfs_io_timers_write,
 621
 622         &sysfs_trigger_gc,
 623         &sysfs_trigger_discards,
 624         &sysfs_prune_cache,
 625
 626         &sysfs_read_realloc_races,
 627         &sysfs_extent_migrate_done,
 628         &sysfs_extent_migrate_raced,
 629         &sysfs_bucket_alloc_fail,
 630
 631         &sysfs_gc_gens_pos,
 632
 633         &sysfs_copy_gc_enabled,
 634         &sysfs_copy_gc_wait,
 635
 636         &sysfs_rebalance_enabled,
 637         &sysfs_rebalance_work,
 638         sysfs_pd_controller_files(rebalance),
 639
 640         &sysfs_data_jobs,
 641
 642         &sysfs_internal_uuid,
 643         NULL
 644 };
 645
 646 /* options */
 647
 648 SHOW(bch2_fs_opts_dir)
 649 {
 650         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 651         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 652         int id = opt - bch2_opt_table;
 653         u64 v = bch2_opt_get_by_id(&c->opts, id);
 654
 655         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 656         pr_char(out, '\n');
 657
 658         return 0;
 659 }
 660
 661 STORE(bch2_fs_opts_dir)
 662 {
 663         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 664         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 665         int ret, id = opt - bch2_opt_table;
 666         char *tmp;
 667         u64 v;
 668
 669         /*
 670          * We don't need to take c->writes for correctness, but it eliminates an
 671          * unsightly error message in the dmesg log when we're RO:
 672          */
 673         if (unlikely(!percpu_ref_tryget(&c->writes)))
 674                 return -EROFS;
 675
 676         tmp = kstrdup(buf, GFP_KERNEL);
 677         if (!tmp) {
 678                 ret = -ENOMEM;
 679                 goto err;
 680         }
 681
 682         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 683         kfree(tmp);
 684
 685         if (ret < 0)
 686                 goto err;
 687
 688         ret = bch2_opt_check_may_set(c, id, v);
 689         if (ret < 0)
 690                 goto err;
 691
 692         bch2_opt_set_sb(c, opt, v);
 693         bch2_opt_set_by_id(&c->opts, id, v);
 694
 695         if ((id == Opt_background_target ||
 696              id == Opt_background_compression) && v) {
 697                 bch2_rebalance_add_work(c, S64_MAX);
 698                 rebalance_wakeup(c);
 699         }
 700
 701         ret = size;
 702 err:
 703         percpu_ref_put(&c->writes);
 704         return ret;
 705 }
 706 SYSFS_OPS(bch2_fs_opts_dir);
 707
 708 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 709
 710 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 711 {
 712         const struct bch_option *i;
 713         int ret;
 714
 715         for (i = bch2_opt_table;
 716              i < bch2_opt_table + bch2_opts_nr;
 717              i++) {
 718                 if (!(i->flags & OPT_FS))
 719                         continue;
 720
 721                 ret = sysfs_create_file(kobj, &i->attr);
 722                 if (ret)
 723                         return ret;
 724         }
 725
 726         return 0;
 727 }
 728
 729 /* time stats */
 730
 731 SHOW(bch2_fs_time_stats)
 732 {
 733         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 734
 735 #define x(name)                                                         \
 736         if (attr == &sysfs_time_stat_##name)                            \
 737                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 738         BCH_TIME_STATS()
 739 #undef x
 740
 741         return 0;
 742 }
 743
 744 STORE(bch2_fs_time_stats)
 745 {
 746         return size;
 747 }
 748 SYSFS_OPS(bch2_fs_time_stats);
 749
 750 struct attribute *bch2_fs_time_stats_files[] = {
 751 #define x(name)                                         \
 752         &sysfs_time_stat_##name,
 753         BCH_TIME_STATS()
 754 #undef x
 755         NULL
 756 };
 757
 758 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 759 {
 760         struct bch_fs *c = ca->fs;
 761         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 762         unsigned i, nr[BCH_DATA_NR];
 763
 764         memset(nr, 0, sizeof(nr));
 765
 766         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 767                 nr[c->open_buckets[i].data_type]++;
 768
 769         pr_buf(out,
 770                "\t\t\t buckets\t sectors      fragmented\n"
 771                "capacity\t%16llu\n",
 772                ca->mi.nbuckets - ca->mi.first_bucket);
 773
 774         for (i = 0; i < BCH_DATA_NR; i++)
 775                 pr_buf(out, "%-16s%16llu%16llu%16llu\n",
 776                        bch2_data_types[i], stats.d[i].buckets,
 777                        stats.d[i].sectors, stats.d[i].fragmented);
 778
 779         pr_buf(out,
 780                "ec\t\t%16llu\n"
 781                "\n"
 782                "freelist_wait\t\t%s\n"
 783                "open buckets allocated\t%u\n"
 784                "open buckets this dev\t%u\n"
 785                "open buckets total\t%u\n"
 786                "open_buckets_wait\t%s\n"
 787                "open_buckets_btree\t%u\n"
 788                "open_buckets_user\t%u\n"
 789                "btree reserve cache\t%u\n",
 790                stats.buckets_ec,
 791                c->freelist_wait.list.first              ? "waiting" : "empty",
 792                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 793                ca->nr_open_buckets,
 794                OPEN_BUCKETS_COUNT,
 795                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 796                nr[BCH_DATA_btree],
 797                nr[BCH_DATA_user],
 798                c->btree_reserve_cache_nr);
 799 }
 800
 801 static const char * const bch2_rw[] = {
 802         "read",
 803         "write",
 804         NULL
 805 };
 806
 807 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 808 {
 809         int rw, i;
 810
 811         for (rw = 0; rw < 2; rw++) {
 812                 pr_buf(out, "%s:\n", bch2_rw[rw]);
 813
 814                 for (i = 1; i < BCH_DATA_NR; i++)
 815                         pr_buf(out, "%-12s:%12llu\n",
 816                                bch2_data_types[i],
 817                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 818         }
 819 }
 820
 821 SHOW(bch2_dev)
 822 {
 823         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 824         struct bch_fs *c = ca->fs;
 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.sb,
 838                                                ca->mi.group - 1);
 839                         mutex_unlock(&c->sb_lock);
 840                 }
 841
 842                 pr_char(out, '\n');
 843         }
 844
 845         if (attr == &sysfs_has_data) {
 846                 bch2_flags_to_text(out, bch2_data_types,
 847                                    bch2_dev_has_data(c, ca));
 848                 pr_char(out, '\n');
 849         }
 850
 851         if (attr == &sysfs_state_rw) {
 852                 bch2_string_opt_to_text(out, bch2_member_states,
 853                                         ca->mi.state);
 854                 pr_char(out, '\n');
 855         }
 856
 857         if (attr == &sysfs_iodone)
 858                 dev_iodone_to_text(out, ca);
 859
 860         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 861         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 862
 863         if (attr == &sysfs_io_latency_stats_read)
 864                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 865
 866         if (attr == &sysfs_io_latency_stats_write)
 867                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 868
 869         sysfs_printf(congested,                 "%u%%",
 870                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 871                      * 100 / CONGESTED_MAX);
 872
 873         if (attr == &sysfs_alloc_debug)
 874                 dev_alloc_debug_to_text(out, ca);
 875
 876         return 0;
 877 }
 878
 879 STORE(bch2_dev)
 880 {
 881         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 882         struct bch_fs *c = ca->fs;
 883         struct bch_member *mi;
 884
 885         if (attr == &sysfs_discard) {
 886                 bool v = strtoul_or_return(buf);
 887
 888                 mutex_lock(&c->sb_lock);
 889                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 890
 891                 if (v != BCH_MEMBER_DISCARD(mi)) {
 892                         SET_BCH_MEMBER_DISCARD(mi, v);
 893                         bch2_write_super(c);
 894                 }
 895                 mutex_unlock(&c->sb_lock);
 896         }
 897
 898         if (attr == &sysfs_label) {
 899                 char *tmp;
 900                 int ret;
 901
 902                 tmp = kstrdup(buf, GFP_KERNEL);
 903                 if (!tmp)
 904                         return -ENOMEM;
 905
 906                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 907                 kfree(tmp);
 908                 if (ret)
 909                         return ret;
 910         }
 911
 912         return size;
 913 }
 914 SYSFS_OPS(bch2_dev);
 915
 916 struct attribute *bch2_dev_files[] = {
 917         &sysfs_uuid,
 918         &sysfs_bucket_size,
 919         &sysfs_first_bucket,
 920         &sysfs_nbuckets,
 921         &sysfs_durability,
 922
 923         /* settings: */
 924         &sysfs_discard,
 925         &sysfs_state_rw,
 926         &sysfs_label,
 927
 928         &sysfs_has_data,
 929         &sysfs_iodone,
 930
 931         &sysfs_io_latency_read,
 932         &sysfs_io_latency_write,
 933         &sysfs_io_latency_stats_read,
 934         &sysfs_io_latency_stats_write,
 935         &sysfs_congested,
 936
 937         /* debug: */
 938         &sysfs_alloc_debug,
 939         NULL
 940 };
 941
 942 #endif  /* _BCACHEFS_SYSFS_H_ */