git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * bcache sysfs interfaces
   4  *
   5  * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com>
   6  * Copyright 2012 Google, Inc.
   7  */
   8
   9 #ifndef NO_BCACHEFS_SYSFS
  10
  11 #include "bcachefs.h"
  12 #include "alloc_background.h"
  13 #include "alloc_foreground.h"
  14 #include "sysfs.h"
  15 #include "btree_cache.h"
  16 #include "btree_io.h"
  17 #include "btree_iter.h"
  18 #include "btree_key_cache.h"
  19 #include "btree_update.h"
  20 #include "btree_update_interior.h"
  21 #include "btree_gc.h"
  22 #include "buckets.h"
  23 #include "clock.h"
  24 #include "disk_groups.h"
  25 #include "ec.h"
  26 #include "inode.h"
  27 #include "journal.h"
  28 #include "keylist.h"
  29 #include "move.h"
  30 #include "opts.h"
  31 #include "rebalance.h"
  32 #include "replicas.h"
  33 #include "super-io.h"
  34 #include "tests.h"
  35
  36 #include <linux/blkdev.h>
  37 #include <linux/pretty-printers.h>
  38 #include <linux/sort.h>
  39 #include <linux/sched/clock.h>
  40
  41 #include "util.h"
  42
  43 #define SYSFS_OPS(type)                                                 \
  44 const struct sysfs_ops type ## _sysfs_ops = {                                   \
  45         .show   = type ## _show,                                        \
  46         .store  = type ## _store                                        \
  47 }
  48
  49 #define SHOW(fn)                                                        \
  50 static ssize_t fn ## _to_text(struct printbuf *,                        \
  51                               struct kobject *, struct attribute *);\
  52                                                                         \
  53 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  54                            char *buf)                                   \
  55 {                                                                       \
  56         struct printbuf out = PRINTBUF;                                 \
  57         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  58                                                                         \
  59         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  60                 prt_newline(&out);                                      \
  61                                                                         \
  62         if (!ret && out.allocation_failure)                             \
  63                 ret = -ENOMEM;                                          \
  64                                                                         \
  65         if (!ret) {                                                     \
  66                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  67                 memcpy(buf, out.buf, ret);                              \
  68         }                                                               \
  69         printbuf_exit(&out);                                            \
  70         return ret;                                                     \
  71 }                                                                       \
  72                                                                         \
  73 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  74                               struct attribute *attr)
  75
  76 #define STORE(fn)                                                       \
  77 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  78                             const char *buf, size_t size)               \
  79
  80 #define __sysfs_attribute(_name, _mode)                                 \
  81         static struct attribute sysfs_##_name =                         \
  82                 { .name = #_name, .mode = _mode }
  83
  84 #define write_attribute(n)      __sysfs_attribute(n, S_IWUSR)
  85 #define read_attribute(n)       __sysfs_attribute(n, S_IRUGO)
  86 #define rw_attribute(n)         __sysfs_attribute(n, S_IRUGO|S_IWUSR)
  87
  88 #define sysfs_printf(file, fmt, ...)                                    \
  89 do {                                                                    \
  90         if (attr == &sysfs_ ## file)                                    \
  91                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
  92 } while (0)
  93
  94 #define sysfs_print(file, var)                                          \
  95 do {                                                                    \
  96         if (attr == &sysfs_ ## file)                                    \
  97                 snprint(out, var);                                      \
  98 } while (0)
  99
 100 #define sysfs_hprint(file, val)                                         \
 101 do {                                                                    \
 102         if (attr == &sysfs_ ## file)                                    \
 103                 prt_human_readable_s64(out, val);                       \
 104 } while (0)
 105
 106 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 107 #define var_print(_var)         sysfs_print(_var, var(_var))
 108 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 109
 110 #define sysfs_strtoul(file, var)                                        \
 111 do {                                                                    \
 112         if (attr == &sysfs_ ## file)                                    \
 113                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 114 } while (0)
 115
 116 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 117 do {                                                                    \
 118         if (attr == &sysfs_ ## file)                                    \
 119                 return strtoul_safe_clamp(buf, var, min, max)           \
 120                         ?: (ssize_t) size;                              \
 121 } while (0)
 122
 123 #define strtoul_or_return(cp)                                           \
 124 ({                                                                      \
 125         unsigned long _v;                                               \
 126         int _r = kstrtoul(cp, 10, &_v);                                 \
 127         if (_r)                                                         \
 128                 return _r;                                              \
 129         _v;                                                             \
 130 })
 131
 132 #define strtoul_restrict_or_return(cp, min, max)                        \
 133 ({                                                                      \
 134         unsigned long __v = 0;                                          \
 135         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 136         if (_r)                                                         \
 137                 return _r;                                              \
 138         __v;                                                            \
 139 })
 140
 141 #define strtoi_h_or_return(cp)                                          \
 142 ({                                                                      \
 143         u64 _v;                                                         \
 144         int _r = strtoi_h(cp, &_v);                                     \
 145         if (_r)                                                         \
 146                 return _r;                                              \
 147         _v;                                                             \
 148 })
 149
 150 #define sysfs_hatoi(file, var)                                          \
 151 do {                                                                    \
 152         if (attr == &sysfs_ ## file)                                    \
 153                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 154 } while (0)
 155
 156 write_attribute(trigger_gc);
 157 write_attribute(trigger_discards);
 158 write_attribute(trigger_invalidates);
 159 write_attribute(prune_cache);
 160 rw_attribute(btree_gc_periodic);
 161 rw_attribute(gc_gens_pos);
 162
 163 read_attribute(uuid);
 164 read_attribute(minor);
 165 read_attribute(bucket_size);
 166 read_attribute(first_bucket);
 167 read_attribute(nbuckets);
 168 read_attribute(durability);
 169 read_attribute(iodone);
 170
 171 read_attribute(io_latency_read);
 172 read_attribute(io_latency_write);
 173 read_attribute(io_latency_stats_read);
 174 read_attribute(io_latency_stats_write);
 175 read_attribute(congested);
 176
 177 read_attribute(btree_avg_write_size);
 178
 179 read_attribute(btree_cache_size);
 180 read_attribute(compression_stats);
 181 read_attribute(journal_debug);
 182 read_attribute(btree_updates);
 183 read_attribute(btree_cache);
 184 read_attribute(btree_key_cache);
 185 read_attribute(btree_transactions);
 186 read_attribute(stripes_heap);
 187 read_attribute(open_buckets);
 188
 189 read_attribute(internal_uuid);
 190
 191 read_attribute(has_data);
 192 read_attribute(alloc_debug);
 193
 194 read_attribute(read_realloc_races);
 195 read_attribute(extent_migrate_done);
 196 read_attribute(extent_migrate_raced);
 197 read_attribute(bucket_alloc_fail);
 198
 199 #define x(t, n, ...) read_attribute(t);
 200 BCH_PERSISTENT_COUNTERS()
 201 #undef x
 202
 203 rw_attribute(discard);
 204 rw_attribute(label);
 205
 206 rw_attribute(copy_gc_enabled);
 207 read_attribute(copy_gc_wait);
 208
 209 rw_attribute(rebalance_enabled);
 210 sysfs_pd_controller_attribute(rebalance);
 211 read_attribute(rebalance_work);
 212 rw_attribute(promote_whole_extents);
 213
 214 read_attribute(new_stripes);
 215
 216 read_attribute(io_timers_read);
 217 read_attribute(io_timers_write);
 218
 219 read_attribute(data_jobs);
 220
 221 #ifdef CONFIG_BCACHEFS_TESTS
 222 write_attribute(perf_test);
 223 #endif /* CONFIG_BCACHEFS_TESTS */
 224
 225 #define x(_name)                                                \
 226         static struct attribute sysfs_time_stat_##_name =               \
 227                 { .name = #_name, .mode = S_IRUGO };
 228         BCH_TIME_STATS()
 229 #undef x
 230
 231 static struct attribute sysfs_state_rw = {
 232         .name = "state",
 233         .mode = S_IRUGO
 234 };
 235
 236 static size_t bch2_btree_cache_size(struct bch_fs *c)
 237 {
 238         size_t ret = 0;
 239         struct btree *b;
 240
 241         mutex_lock(&c->btree_cache.lock);
 242         list_for_each_entry(b, &c->btree_cache.live, list)
 243                 ret += btree_bytes(c);
 244
 245         mutex_unlock(&c->btree_cache.lock);
 246         return ret;
 247 }
 248
 249 static size_t bch2_btree_avg_write_size(struct bch_fs *c)
 250 {
 251         u64 nr = atomic64_read(&c->btree_writes_nr);
 252         u64 sectors = atomic64_read(&c->btree_writes_sectors);
 253
 254         return nr ? div64_u64(sectors, nr) : 0;
 255 }
 256
 257 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 258 {
 259         long ret = 0;
 260         struct bch_move_stats *stats;
 261
 262         mutex_lock(&c->data_progress_lock);
 263         list_for_each_entry(stats, &c->data_progress_list, list) {
 264                 prt_printf(out, "%s: data type %s btree_id %s position: ",
 265                        stats->name,
 266                        bch2_data_types[stats->data_type],
 267                        bch2_btree_ids[stats->btree_id]);
 268                 bch2_bpos_to_text(out, stats->pos);
 269                 prt_printf(out, "%s", "\n");
 270         }
 271
 272         mutex_unlock(&c->data_progress_lock);
 273         return ret;
 274 }
 275
 276 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 277 {
 278         struct btree_trans trans;
 279         struct btree_iter iter;
 280         struct bkey_s_c k;
 281         enum btree_id id;
 282         u64 nr_uncompressed_extents = 0,
 283             nr_compressed_extents = 0,
 284             nr_incompressible_extents = 0,
 285             uncompressed_sectors = 0,
 286             incompressible_sectors = 0,
 287             compressed_sectors_compressed = 0,
 288             compressed_sectors_uncompressed = 0;
 289         int ret;
 290
 291         if (!test_bit(BCH_FS_STARTED, &c->flags))
 292                 return -EPERM;
 293
 294         bch2_trans_init(&trans, c, 0, 0);
 295
 296         for (id = 0; id < BTREE_ID_NR; id++) {
 297                 if (!((1U << id) & BTREE_ID_HAS_PTRS))
 298                         continue;
 299
 300                 for_each_btree_key(&trans, iter, id, POS_MIN,
 301                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 302                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 303                         const union bch_extent_entry *entry;
 304                         struct extent_ptr_decoded p;
 305                         bool compressed = false, uncompressed = false, incompressible = false;
 306
 307                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 308                                 switch (p.crc.compression_type) {
 309                                 case BCH_COMPRESSION_TYPE_none:
 310                                         uncompressed = true;
 311                                         uncompressed_sectors += k.k->size;
 312                                         break;
 313                                 case BCH_COMPRESSION_TYPE_incompressible:
 314                                         incompressible = true;
 315                                         incompressible_sectors += k.k->size;
 316                                         break;
 317                                 default:
 318                                         compressed_sectors_compressed +=
 319                                                 p.crc.compressed_size;
 320                                         compressed_sectors_uncompressed +=
 321                                                 p.crc.uncompressed_size;
 322                                         compressed = true;
 323                                         break;
 324                                 }
 325                         }
 326
 327                         if (incompressible)
 328                                 nr_incompressible_extents++;
 329                         else if (uncompressed)
 330                                 nr_uncompressed_extents++;
 331                         else if (compressed)
 332                                 nr_compressed_extents++;
 333                 }
 334                 bch2_trans_iter_exit(&trans, &iter);
 335         }
 336
 337         bch2_trans_exit(&trans);
 338
 339         if (ret)
 340                 return ret;
 341
 342         prt_printf(out, "uncompressed:\n");
 343         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 344         prt_printf(out, "       size:                   ");
 345         prt_human_readable_u64(out, uncompressed_sectors << 9);
 346         prt_printf(out, "\n");
 347
 348         prt_printf(out, "compressed:\n");
 349         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 350         prt_printf(out, "       compressed size:        ");
 351         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 352         prt_printf(out, "\n");
 353         prt_printf(out, "       uncompressed size:      ");
 354         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 355         prt_printf(out, "\n");
 356
 357         prt_printf(out, "incompressible:\n");
 358         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 359         prt_printf(out, "       size:                   ");
 360         prt_human_readable_u64(out, incompressible_sectors << 9);
 361         prt_printf(out, "\n");
 362         return 0;
 363 }
 364
 365 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 366 {
 367         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 368         bch2_bpos_to_text(out, c->gc_gens_pos);
 369         prt_printf(out, "\n");
 370 }
 371
 372 SHOW(bch2_fs)
 373 {
 374         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 375
 376         sysfs_print(minor,                      c->minor);
 377         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 378
 379         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 380         sysfs_hprint(btree_avg_write_size,      bch2_btree_avg_write_size(c));
 381
 382         sysfs_print(read_realloc_races,
 383                     atomic_long_read(&c->read_realloc_races));
 384         sysfs_print(extent_migrate_done,
 385                     atomic_long_read(&c->extent_migrate_done));
 386         sysfs_print(extent_migrate_raced,
 387                     atomic_long_read(&c->extent_migrate_raced));
 388         sysfs_print(bucket_alloc_fail,
 389                     atomic_long_read(&c->bucket_alloc_fail));
 390
 391         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 392
 393         if (attr == &sysfs_gc_gens_pos)
 394                 bch2_gc_gens_pos_to_text(out, c);
 395
 396         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 397
 398         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 399         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 400         sysfs_hprint(copy_gc_wait,
 401                      max(0LL, c->copygc_wait -
 402                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 403
 404         if (attr == &sysfs_rebalance_work)
 405                 bch2_rebalance_work_to_text(out, c);
 406
 407         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 408
 409         /* Debugging: */
 410
 411         if (attr == &sysfs_journal_debug)
 412                 bch2_journal_debug_to_text(out, &c->journal);
 413
 414         if (attr == &sysfs_btree_updates)
 415                 bch2_btree_updates_to_text(out, c);
 416
 417         if (attr == &sysfs_btree_cache)
 418                 bch2_btree_cache_to_text(out, c);
 419
 420         if (attr == &sysfs_btree_key_cache)
 421                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 422
 423         if (attr == &sysfs_btree_transactions)
 424                 bch2_btree_trans_to_text(out, c);
 425
 426         if (attr == &sysfs_stripes_heap)
 427                 bch2_stripes_heap_to_text(out, c);
 428
 429         if (attr == &sysfs_open_buckets)
 430                 bch2_open_buckets_to_text(out, c);
 431
 432         if (attr == &sysfs_compression_stats)
 433                 bch2_compression_stats_to_text(out, c);
 434
 435         if (attr == &sysfs_new_stripes)
 436                 bch2_new_stripes_to_text(out, c);
 437
 438         if (attr == &sysfs_io_timers_read)
 439                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 440
 441         if (attr == &sysfs_io_timers_write)
 442                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 443
 444         if (attr == &sysfs_data_jobs)
 445                 data_progress_to_text(out, c);
 446
 447         return 0;
 448 }
 449
 450 STORE(bch2_fs)
 451 {
 452         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 453
 454         if (attr == &sysfs_btree_gc_periodic) {
 455                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 456                         ?: (ssize_t) size;
 457
 458                 wake_up_process(c->gc_thread);
 459                 return ret;
 460         }
 461
 462         if (attr == &sysfs_copy_gc_enabled) {
 463                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 464                         ?: (ssize_t) size;
 465
 466                 if (c->copygc_thread)
 467                         wake_up_process(c->copygc_thread);
 468                 return ret;
 469         }
 470
 471         if (attr == &sysfs_rebalance_enabled) {
 472                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 473                         ?: (ssize_t) size;
 474
 475                 rebalance_wakeup(c);
 476                 return ret;
 477         }
 478
 479         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 480
 481         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 482
 483         /* Debugging: */
 484
 485         if (!test_bit(BCH_FS_STARTED, &c->flags))
 486                 return -EPERM;
 487
 488         /* Debugging: */
 489
 490         if (!test_bit(BCH_FS_RW, &c->flags))
 491                 return -EROFS;
 492
 493         if (attr == &sysfs_prune_cache) {
 494                 struct shrink_control sc;
 495
 496                 sc.gfp_mask = GFP_KERNEL;
 497                 sc.nr_to_scan = strtoul_or_return(buf);
 498                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 499         }
 500
 501         if (attr == &sysfs_trigger_gc) {
 502                 /*
 503                  * Full gc is currently incompatible with btree key cache:
 504                  */
 505 #if 0
 506                 down_read(&c->state_lock);
 507                 bch2_gc(c, false, false);
 508                 up_read(&c->state_lock);
 509 #else
 510                 bch2_gc_gens(c);
 511 #endif
 512         }
 513
 514         if (attr == &sysfs_trigger_discards)
 515                 bch2_do_discards(c);
 516
 517         if (attr == &sysfs_trigger_invalidates)
 518                 bch2_do_invalidates(c);
 519
 520 #ifdef CONFIG_BCACHEFS_TESTS
 521         if (attr == &sysfs_perf_test) {
 522                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 523                 char *test              = strsep(&p, " \t\n");
 524                 char *nr_str            = strsep(&p, " \t\n");
 525                 char *threads_str       = strsep(&p, " \t\n");
 526                 unsigned threads;
 527                 u64 nr;
 528                 int ret = -EINVAL;
 529
 530                 if (threads_str &&
 531                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 532                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 533                         ret = bch2_btree_perf_test(c, test, nr, threads);
 534                 kfree(tmp);
 535
 536                 if (ret)
 537                         size = ret;
 538         }
 539 #endif
 540         return size;
 541 }
 542 SYSFS_OPS(bch2_fs);
 543
 544 struct attribute *bch2_fs_files[] = {
 545         &sysfs_minor,
 546         &sysfs_btree_cache_size,
 547         &sysfs_btree_avg_write_size,
 548
 549         &sysfs_promote_whole_extents,
 550
 551         &sysfs_compression_stats,
 552
 553 #ifdef CONFIG_BCACHEFS_TESTS
 554         &sysfs_perf_test,
 555 #endif
 556         NULL
 557 };
 558
 559 /* counters dir */
 560
 561 SHOW(bch2_fs_counters)
 562 {
 563         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 564         u64 counter = 0;
 565         u64 counter_since_mount = 0;
 566
 567         out->tabstops[0] = 32;
 568         #define x(t, ...) \
 569                 if (attr == &sysfs_##t) {                                       \
 570                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 571                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 572                         prt_printf(out, "since mount:");                                \
 573                         prt_tab(out);                                           \
 574                         prt_human_readable_u64(out, counter_since_mount << 9);  \
 575                         prt_newline(out);                                       \
 576                                                                                 \
 577                         prt_printf(out, "since filesystem creation:");          \
 578                         prt_tab(out);                                           \
 579                         prt_human_readable_u64(out, counter << 9);              \
 580                         prt_newline(out);                                       \
 581                 }
 582         BCH_PERSISTENT_COUNTERS()
 583         #undef x
 584         return 0;
 585 }
 586
 587 STORE(bch2_fs_counters) {
 588         return 0;
 589 }
 590
 591 SYSFS_OPS(bch2_fs_counters);
 592
 593 struct attribute *bch2_fs_counters_files[] = {
 594 #define x(t, ...) \
 595         &sysfs_##t,
 596         BCH_PERSISTENT_COUNTERS()
 597 #undef x
 598         NULL
 599 };
 600 /* internal dir - just a wrapper */
 601
 602 SHOW(bch2_fs_internal)
 603 {
 604         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 605         return bch2_fs_to_text(out, &c->kobj, attr);
 606 }
 607
 608 STORE(bch2_fs_internal)
 609 {
 610         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 611         return bch2_fs_store(&c->kobj, attr, buf, size);
 612 }
 613 SYSFS_OPS(bch2_fs_internal);
 614
 615 struct attribute *bch2_fs_internal_files[] = {
 616         &sysfs_journal_debug,
 617         &sysfs_btree_updates,
 618         &sysfs_btree_cache,
 619         &sysfs_btree_key_cache,
 620         &sysfs_btree_transactions,
 621         &sysfs_new_stripes,
 622         &sysfs_stripes_heap,
 623         &sysfs_open_buckets,
 624         &sysfs_io_timers_read,
 625         &sysfs_io_timers_write,
 626
 627         &sysfs_trigger_gc,
 628         &sysfs_trigger_discards,
 629         &sysfs_trigger_invalidates,
 630         &sysfs_prune_cache,
 631
 632         &sysfs_read_realloc_races,
 633         &sysfs_extent_migrate_done,
 634         &sysfs_extent_migrate_raced,
 635         &sysfs_bucket_alloc_fail,
 636
 637         &sysfs_gc_gens_pos,
 638
 639         &sysfs_copy_gc_enabled,
 640         &sysfs_copy_gc_wait,
 641
 642         &sysfs_rebalance_enabled,
 643         &sysfs_rebalance_work,
 644         sysfs_pd_controller_files(rebalance),
 645
 646         &sysfs_data_jobs,
 647
 648         &sysfs_internal_uuid,
 649         NULL
 650 };
 651
 652 /* options */
 653
 654 SHOW(bch2_fs_opts_dir)
 655 {
 656         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 657         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 658         int id = opt - bch2_opt_table;
 659         u64 v = bch2_opt_get_by_id(&c->opts, id);
 660
 661         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 662         prt_char(out, '\n');
 663
 664         return 0;
 665 }
 666
 667 STORE(bch2_fs_opts_dir)
 668 {
 669         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 670         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 671         int ret, id = opt - bch2_opt_table;
 672         char *tmp;
 673         u64 v;
 674
 675         /*
 676          * We don't need to take c->writes for correctness, but it eliminates an
 677          * unsightly error message in the dmesg log when we're RO:
 678          */
 679         if (unlikely(!percpu_ref_tryget(&c->writes)))
 680                 return -EROFS;
 681
 682         tmp = kstrdup(buf, GFP_KERNEL);
 683         if (!tmp) {
 684                 ret = -ENOMEM;
 685                 goto err;
 686         }
 687
 688         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 689         kfree(tmp);
 690
 691         if (ret < 0)
 692                 goto err;
 693
 694         ret = bch2_opt_check_may_set(c, id, v);
 695         if (ret < 0)
 696                 goto err;
 697
 698         bch2_opt_set_sb(c, opt, v);
 699         bch2_opt_set_by_id(&c->opts, id, v);
 700
 701         if ((id == Opt_background_target ||
 702              id == Opt_background_compression) && v) {
 703                 bch2_rebalance_add_work(c, S64_MAX);
 704                 rebalance_wakeup(c);
 705         }
 706
 707         ret = size;
 708 err:
 709         percpu_ref_put(&c->writes);
 710         return ret;
 711 }
 712 SYSFS_OPS(bch2_fs_opts_dir);
 713
 714 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 715
 716 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 717 {
 718         const struct bch_option *i;
 719         int ret;
 720
 721         for (i = bch2_opt_table;
 722              i < bch2_opt_table + bch2_opts_nr;
 723              i++) {
 724                 if (!(i->flags & OPT_FS))
 725                         continue;
 726
 727                 ret = sysfs_create_file(kobj, &i->attr);
 728                 if (ret)
 729                         return ret;
 730         }
 731
 732         return 0;
 733 }
 734
 735 /* time stats */
 736
 737 SHOW(bch2_fs_time_stats)
 738 {
 739         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 740
 741 #define x(name)                                                         \
 742         if (attr == &sysfs_time_stat_##name)                            \
 743                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 744         BCH_TIME_STATS()
 745 #undef x
 746
 747         return 0;
 748 }
 749
 750 STORE(bch2_fs_time_stats)
 751 {
 752         return size;
 753 }
 754 SYSFS_OPS(bch2_fs_time_stats);
 755
 756 struct attribute *bch2_fs_time_stats_files[] = {
 757 #define x(name)                                         \
 758         &sysfs_time_stat_##name,
 759         BCH_TIME_STATS()
 760 #undef x
 761         NULL
 762 };
 763
 764 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 765 {
 766         struct bch_fs *c = ca->fs;
 767         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 768         unsigned i, nr[BCH_DATA_NR];
 769
 770         memset(nr, 0, sizeof(nr));
 771
 772         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 773                 nr[c->open_buckets[i].data_type]++;
 774
 775         prt_printf(out,
 776                "\t\t\t buckets\t sectors      fragmented\n"
 777                "capacity\t%16llu\n",
 778                ca->mi.nbuckets - ca->mi.first_bucket);
 779
 780         for (i = 0; i < BCH_DATA_NR; i++)
 781                 prt_printf(out, "%-16s%16llu%16llu%16llu\n",
 782                        bch2_data_types[i], stats.d[i].buckets,
 783                        stats.d[i].sectors, stats.d[i].fragmented);
 784
 785         prt_printf(out,
 786                "ec\t\t%16llu\n"
 787                "\n"
 788                "freelist_wait\t\t%s\n"
 789                "open buckets allocated\t%u\n"
 790                "open buckets this dev\t%u\n"
 791                "open buckets total\t%u\n"
 792                "open_buckets_wait\t%s\n"
 793                "open_buckets_btree\t%u\n"
 794                "open_buckets_user\t%u\n"
 795                "buckets_to_invalidate\t%llu\n"
 796                "btree reserve cache\t%u\n",
 797                stats.buckets_ec,
 798                c->freelist_wait.list.first              ? "waiting" : "empty",
 799                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 800                ca->nr_open_buckets,
 801                OPEN_BUCKETS_COUNT,
 802                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 803                nr[BCH_DATA_btree],
 804                nr[BCH_DATA_user],
 805                should_invalidate_buckets(ca, stats),
 806                c->btree_reserve_cache_nr);
 807 }
 808
 809 static const char * const bch2_rw[] = {
 810         "read",
 811         "write",
 812         NULL
 813 };
 814
 815 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 816 {
 817         int rw, i;
 818
 819         for (rw = 0; rw < 2; rw++) {
 820                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 821
 822                 for (i = 1; i < BCH_DATA_NR; i++)
 823                         prt_printf(out, "%-12s:%12llu\n",
 824                                bch2_data_types[i],
 825                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 826         }
 827 }
 828
 829 SHOW(bch2_dev)
 830 {
 831         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 832         struct bch_fs *c = ca->fs;
 833
 834         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 835
 836         sysfs_print(bucket_size,        bucket_bytes(ca));
 837         sysfs_print(first_bucket,       ca->mi.first_bucket);
 838         sysfs_print(nbuckets,           ca->mi.nbuckets);
 839         sysfs_print(durability,         ca->mi.durability);
 840         sysfs_print(discard,            ca->mi.discard);
 841
 842         if (attr == &sysfs_label) {
 843                 if (ca->mi.group) {
 844                         mutex_lock(&c->sb_lock);
 845                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 846                                                ca->mi.group - 1);
 847                         mutex_unlock(&c->sb_lock);
 848                 }
 849
 850                 prt_char(out, '\n');
 851         }
 852
 853         if (attr == &sysfs_has_data) {
 854                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 855                 prt_char(out, '\n');
 856         }
 857
 858         if (attr == &sysfs_state_rw) {
 859                 prt_string_option(out, bch2_member_states, ca->mi.state);
 860                 prt_char(out, '\n');
 861         }
 862
 863         if (attr == &sysfs_iodone)
 864                 dev_iodone_to_text(out, ca);
 865
 866         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 867         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 868
 869         if (attr == &sysfs_io_latency_stats_read)
 870                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 871
 872         if (attr == &sysfs_io_latency_stats_write)
 873                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 874
 875         sysfs_printf(congested,                 "%u%%",
 876                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 877                      * 100 / CONGESTED_MAX);
 878
 879         if (attr == &sysfs_alloc_debug)
 880                 dev_alloc_debug_to_text(out, ca);
 881
 882         return 0;
 883 }
 884
 885 STORE(bch2_dev)
 886 {
 887         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 888         struct bch_fs *c = ca->fs;
 889         struct bch_member *mi;
 890
 891         if (attr == &sysfs_discard) {
 892                 bool v = strtoul_or_return(buf);
 893
 894                 mutex_lock(&c->sb_lock);
 895                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 896
 897                 if (v != BCH_MEMBER_DISCARD(mi)) {
 898                         SET_BCH_MEMBER_DISCARD(mi, v);
 899                         bch2_write_super(c);
 900                 }
 901                 mutex_unlock(&c->sb_lock);
 902         }
 903
 904         if (attr == &sysfs_label) {
 905                 char *tmp;
 906                 int ret;
 907
 908                 tmp = kstrdup(buf, GFP_KERNEL);
 909                 if (!tmp)
 910                         return -ENOMEM;
 911
 912                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 913                 kfree(tmp);
 914                 if (ret)
 915                         return ret;
 916         }
 917
 918         return size;
 919 }
 920 SYSFS_OPS(bch2_dev);
 921
 922 struct attribute *bch2_dev_files[] = {
 923         &sysfs_uuid,
 924         &sysfs_bucket_size,
 925         &sysfs_first_bucket,
 926         &sysfs_nbuckets,
 927         &sysfs_durability,
 928
 929         /* settings: */
 930         &sysfs_discard,
 931         &sysfs_state_rw,
 932         &sysfs_label,
 933
 934         &sysfs_has_data,
 935         &sysfs_iodone,
 936
 937         &sysfs_io_latency_read,
 938         &sysfs_io_latency_write,
 939         &sysfs_io_latency_stats_read,
 940         &sysfs_io_latency_stats_write,
 941         &sysfs_congested,
 942
 943         /* debug: */
 944         &sysfs_alloc_debug,
 945         NULL
 946 };
 947
 948 #endif  /* _BCACHEFS_SYSFS_H_ */