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 "movinggc.h"
  31 #include "nocow_locking.h"
  32 #include "opts.h"
  33 #include "rebalance.h"
  34 #include "replicas.h"
  35 #include "super-io.h"
  36 #include "tests.h"
  37
  38 #include <linux/blkdev.h>
  39 #include <linux/sort.h>
  40 #include <linux/sched/clock.h>
  41
  42 #include "util.h"
  43
  44 #define SYSFS_OPS(type)                                                 \
  45 const struct sysfs_ops type ## _sysfs_ops = {                           \
  46         .show   = type ## _show,                                        \
  47         .store  = type ## _store                                        \
  48 }
  49
  50 #define SHOW(fn)                                                        \
  51 static ssize_t fn ## _to_text(struct printbuf *,                        \
  52                               struct kobject *, struct attribute *);    \
  53                                                                         \
  54 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  55                            char *buf)                                   \
  56 {                                                                       \
  57         struct printbuf out = PRINTBUF;                                 \
  58         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  59                                                                         \
  60         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  61                 prt_newline(&out);                                      \
  62                                                                         \
  63         if (!ret && out.allocation_failure)                             \
  64                 ret = -ENOMEM;                                          \
  65                                                                         \
  66         if (!ret) {                                                     \
  67                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  68                 memcpy(buf, out.buf, ret);                              \
  69         }                                                               \
  70         printbuf_exit(&out);                                            \
  71         return bch2_err_class(ret);                                     \
  72 }                                                                       \
  73                                                                         \
  74 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  75                               struct attribute *attr)
  76
  77 #define STORE(fn)                                                       \
  78 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
  79                             const char *, size_t);                      \
  80                                                                         \
  81 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  82                             const char *buf, size_t size)               \
  83 {                                                                       \
  84         return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
  85 }                                                                       \
  86                                                                         \
  87 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
  88                                   const char *buf, size_t size)
  89
  90 #define __sysfs_attribute(_name, _mode)                                 \
  91         static struct attribute sysfs_##_name =                         \
  92                 { .name = #_name, .mode = _mode }
  93
  94 #define write_attribute(n)      __sysfs_attribute(n, 0200)
  95 #define read_attribute(n)       __sysfs_attribute(n, 0444)
  96 #define rw_attribute(n)         __sysfs_attribute(n, 0644)
  97
  98 #define sysfs_printf(file, fmt, ...)                                    \
  99 do {                                                                    \
 100         if (attr == &sysfs_ ## file)                                    \
 101                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
 102 } while (0)
 103
 104 #define sysfs_print(file, var)                                          \
 105 do {                                                                    \
 106         if (attr == &sysfs_ ## file)                                    \
 107                 snprint(out, var);                                      \
 108 } while (0)
 109
 110 #define sysfs_hprint(file, val)                                         \
 111 do {                                                                    \
 112         if (attr == &sysfs_ ## file)                                    \
 113                 prt_human_readable_s64(out, val);                       \
 114 } while (0)
 115
 116 #define sysfs_strtoul(file, var)                                        \
 117 do {                                                                    \
 118         if (attr == &sysfs_ ## file)                                    \
 119                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 120 } while (0)
 121
 122 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 123 do {                                                                    \
 124         if (attr == &sysfs_ ## file)                                    \
 125                 return strtoul_safe_clamp(buf, var, min, max)           \
 126                         ?: (ssize_t) size;                              \
 127 } while (0)
 128
 129 #define strtoul_or_return(cp)                                           \
 130 ({                                                                      \
 131         unsigned long _v;                                               \
 132         int _r = kstrtoul(cp, 10, &_v);                                 \
 133         if (_r)                                                         \
 134                 return _r;                                              \
 135         _v;                                                             \
 136 })
 137
 138 write_attribute(trigger_gc);
 139 write_attribute(trigger_discards);
 140 write_attribute(trigger_invalidates);
 141 write_attribute(prune_cache);
 142 write_attribute(btree_wakeup);
 143 rw_attribute(btree_gc_periodic);
 144 rw_attribute(gc_gens_pos);
 145
 146 read_attribute(uuid);
 147 read_attribute(minor);
 148 read_attribute(bucket_size);
 149 read_attribute(first_bucket);
 150 read_attribute(nbuckets);
 151 rw_attribute(durability);
 152 read_attribute(iodone);
 153
 154 read_attribute(io_latency_read);
 155 read_attribute(io_latency_write);
 156 read_attribute(io_latency_stats_read);
 157 read_attribute(io_latency_stats_write);
 158 read_attribute(congested);
 159
 160 read_attribute(btree_write_stats);
 161
 162 read_attribute(btree_cache_size);
 163 read_attribute(compression_stats);
 164 read_attribute(journal_debug);
 165 read_attribute(btree_updates);
 166 read_attribute(btree_cache);
 167 read_attribute(btree_key_cache);
 168 read_attribute(stripes_heap);
 169 read_attribute(open_buckets);
 170 read_attribute(open_buckets_partial);
 171 read_attribute(write_points);
 172 read_attribute(nocow_lock_table);
 173
 174 #ifdef BCH_WRITE_REF_DEBUG
 175 read_attribute(write_refs);
 176
 177 static const char * const bch2_write_refs[] = {
 178 #define x(n)    #n,
 179         BCH_WRITE_REFS()
 180 #undef x
 181         NULL
 182 };
 183
 184 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 185 {
 186         bch2_printbuf_tabstop_push(out, 24);
 187
 188         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 189                 prt_str(out, bch2_write_refs[i]);
 190                 prt_tab(out);
 191                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 192                 prt_newline(out);
 193         }
 194 }
 195 #endif
 196
 197 read_attribute(internal_uuid);
 198 read_attribute(disk_groups);
 199
 200 read_attribute(has_data);
 201 read_attribute(alloc_debug);
 202
 203 #define x(t, n, ...) read_attribute(t);
 204 BCH_PERSISTENT_COUNTERS()
 205 #undef x
 206
 207 rw_attribute(discard);
 208 rw_attribute(label);
 209
 210 rw_attribute(copy_gc_enabled);
 211 read_attribute(copy_gc_wait);
 212
 213 rw_attribute(rebalance_enabled);
 214 sysfs_pd_controller_attribute(rebalance);
 215 read_attribute(rebalance_status);
 216 rw_attribute(promote_whole_extents);
 217
 218 read_attribute(new_stripes);
 219
 220 read_attribute(io_timers_read);
 221 read_attribute(io_timers_write);
 222
 223 read_attribute(moving_ctxts);
 224
 225 #ifdef CONFIG_BCACHEFS_TESTS
 226 write_attribute(perf_test);
 227 #endif /* CONFIG_BCACHEFS_TESTS */
 228
 229 #define x(_name)                                                \
 230         static struct attribute sysfs_time_stat_##_name =               \
 231                 { .name = #_name, .mode = 0444 };
 232         BCH_TIME_STATS()
 233 #undef x
 234
 235 static struct attribute sysfs_state_rw = {
 236         .name = "state",
 237         .mode =  0444,
 238 };
 239
 240 static size_t bch2_btree_cache_size(struct bch_fs *c)
 241 {
 242         size_t ret = 0;
 243         struct btree *b;
 244
 245         mutex_lock(&c->btree_cache.lock);
 246         list_for_each_entry(b, &c->btree_cache.live, list)
 247                 ret += btree_bytes(c);
 248
 249         mutex_unlock(&c->btree_cache.lock);
 250         return ret;
 251 }
 252
 253 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 254 {
 255         struct btree_trans *trans;
 256         struct btree_iter iter;
 257         struct bkey_s_c k;
 258         enum btree_id id;
 259         u64 nr_uncompressed_extents = 0,
 260             nr_compressed_extents = 0,
 261             nr_incompressible_extents = 0,
 262             uncompressed_sectors = 0,
 263             incompressible_sectors = 0,
 264             compressed_sectors_compressed = 0,
 265             compressed_sectors_uncompressed = 0;
 266         int ret = 0;
 267
 268         if (!test_bit(BCH_FS_STARTED, &c->flags))
 269                 return -EPERM;
 270
 271         trans = bch2_trans_get(c);
 272
 273         for (id = 0; id < BTREE_ID_NR; id++) {
 274                 if (!btree_type_has_ptrs(id))
 275                         continue;
 276
 277                 for_each_btree_key(trans, iter, id, POS_MIN,
 278                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 279                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 280                         const union bch_extent_entry *entry;
 281                         struct extent_ptr_decoded p;
 282                         bool compressed = false, uncompressed = false, incompressible = false;
 283
 284                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 285                                 switch (p.crc.compression_type) {
 286                                 case BCH_COMPRESSION_TYPE_none:
 287                                         uncompressed = true;
 288                                         uncompressed_sectors += k.k->size;
 289                                         break;
 290                                 case BCH_COMPRESSION_TYPE_incompressible:
 291                                         incompressible = true;
 292                                         incompressible_sectors += k.k->size;
 293                                         break;
 294                                 default:
 295                                         compressed_sectors_compressed +=
 296                                                 p.crc.compressed_size;
 297                                         compressed_sectors_uncompressed +=
 298                                                 p.crc.uncompressed_size;
 299                                         compressed = true;
 300                                         break;
 301                                 }
 302                         }
 303
 304                         if (incompressible)
 305                                 nr_incompressible_extents++;
 306                         else if (uncompressed)
 307                                 nr_uncompressed_extents++;
 308                         else if (compressed)
 309                                 nr_compressed_extents++;
 310                 }
 311                 bch2_trans_iter_exit(trans, &iter);
 312         }
 313
 314         bch2_trans_put(trans);
 315
 316         if (ret)
 317                 return ret;
 318
 319         prt_printf(out, "uncompressed:\n");
 320         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 321         prt_printf(out, "       size:                   ");
 322         prt_human_readable_u64(out, uncompressed_sectors << 9);
 323         prt_printf(out, "\n");
 324
 325         prt_printf(out, "compressed:\n");
 326         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 327         prt_printf(out, "       compressed size:        ");
 328         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 329         prt_printf(out, "\n");
 330         prt_printf(out, "       uncompressed size:      ");
 331         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 332         prt_printf(out, "\n");
 333
 334         prt_printf(out, "incompressible:\n");
 335         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 336         prt_printf(out, "       size:                   ");
 337         prt_human_readable_u64(out, incompressible_sectors << 9);
 338         prt_printf(out, "\n");
 339         return 0;
 340 }
 341
 342 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 343 {
 344         prt_printf(out, "%s: ", bch2_btree_id_str(c->gc_gens_btree));
 345         bch2_bpos_to_text(out, c->gc_gens_pos);
 346         prt_printf(out, "\n");
 347 }
 348
 349 static void bch2_btree_wakeup_all(struct bch_fs *c)
 350 {
 351         struct btree_trans *trans;
 352
 353         seqmutex_lock(&c->btree_trans_lock);
 354         list_for_each_entry(trans, &c->btree_trans_list, list) {
 355                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 356
 357                 if (b)
 358                         six_lock_wakeup_all(&b->lock);
 359
 360         }
 361         seqmutex_unlock(&c->btree_trans_lock);
 362 }
 363
 364 SHOW(bch2_fs)
 365 {
 366         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 367
 368         sysfs_print(minor,                      c->minor);
 369         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 370
 371         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 372
 373         if (attr == &sysfs_btree_write_stats)
 374                 bch2_btree_write_stats_to_text(out, c);
 375
 376         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 377
 378         if (attr == &sysfs_gc_gens_pos)
 379                 bch2_gc_gens_pos_to_text(out, c);
 380
 381         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 382
 383         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 384         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 385
 386         if (attr == &sysfs_copy_gc_wait)
 387                 bch2_copygc_wait_to_text(out, c);
 388
 389         if (attr == &sysfs_rebalance_status)
 390                 bch2_rebalance_status_to_text(out, c);
 391
 392         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 393
 394         /* Debugging: */
 395
 396         if (attr == &sysfs_journal_debug)
 397                 bch2_journal_debug_to_text(out, &c->journal);
 398
 399         if (attr == &sysfs_btree_updates)
 400                 bch2_btree_updates_to_text(out, c);
 401
 402         if (attr == &sysfs_btree_cache)
 403                 bch2_btree_cache_to_text(out, &c->btree_cache);
 404
 405         if (attr == &sysfs_btree_key_cache)
 406                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 407
 408         if (attr == &sysfs_stripes_heap)
 409                 bch2_stripes_heap_to_text(out, c);
 410
 411         if (attr == &sysfs_open_buckets)
 412                 bch2_open_buckets_to_text(out, c);
 413
 414         if (attr == &sysfs_open_buckets_partial)
 415                 bch2_open_buckets_partial_to_text(out, c);
 416
 417         if (attr == &sysfs_write_points)
 418                 bch2_write_points_to_text(out, c);
 419
 420         if (attr == &sysfs_compression_stats)
 421                 bch2_compression_stats_to_text(out, c);
 422
 423         if (attr == &sysfs_new_stripes)
 424                 bch2_new_stripes_to_text(out, c);
 425
 426         if (attr == &sysfs_io_timers_read)
 427                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 428
 429         if (attr == &sysfs_io_timers_write)
 430                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 431
 432         if (attr == &sysfs_moving_ctxts)
 433                 bch2_fs_moving_ctxts_to_text(out, c);
 434
 435 #ifdef BCH_WRITE_REF_DEBUG
 436         if (attr == &sysfs_write_refs)
 437                 bch2_write_refs_to_text(out, c);
 438 #endif
 439
 440         if (attr == &sysfs_nocow_lock_table)
 441                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 442
 443         if (attr == &sysfs_disk_groups)
 444                 bch2_disk_groups_to_text(out, c);
 445
 446         return 0;
 447 }
 448
 449 STORE(bch2_fs)
 450 {
 451         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 452
 453         if (attr == &sysfs_btree_gc_periodic) {
 454                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 455                         ?: (ssize_t) size;
 456
 457                 wake_up_process(c->gc_thread);
 458                 return ret;
 459         }
 460
 461         if (attr == &sysfs_copy_gc_enabled) {
 462                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 463                         ?: (ssize_t) size;
 464
 465                 if (c->copygc_thread)
 466                         wake_up_process(c->copygc_thread);
 467                 return ret;
 468         }
 469
 470         if (attr == &sysfs_rebalance_enabled) {
 471                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 472                         ?: (ssize_t) size;
 473
 474                 rebalance_wakeup(c);
 475                 return ret;
 476         }
 477
 478         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 479
 480         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 481
 482         /* Debugging: */
 483
 484         if (!test_bit(BCH_FS_STARTED, &c->flags))
 485                 return -EPERM;
 486
 487         /* Debugging: */
 488
 489         if (!test_bit(BCH_FS_RW, &c->flags))
 490                 return -EROFS;
 491
 492         if (attr == &sysfs_prune_cache) {
 493                 struct shrink_control sc;
 494
 495                 sc.gfp_mask = GFP_KERNEL;
 496                 sc.nr_to_scan = strtoul_or_return(buf);
 497                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 498         }
 499
 500         if (attr == &sysfs_btree_wakeup)
 501                 bch2_btree_wakeup_all(c);
 502
 503         if (attr == &sysfs_trigger_gc) {
 504                 /*
 505                  * Full gc is currently incompatible with btree key cache:
 506                  */
 507 #if 0
 508                 down_read(&c->state_lock);
 509                 bch2_gc(c, false, false);
 510                 up_read(&c->state_lock);
 511 #else
 512                 bch2_gc_gens(c);
 513 #endif
 514         }
 515
 516         if (attr == &sysfs_trigger_discards)
 517                 bch2_do_discards(c);
 518
 519         if (attr == &sysfs_trigger_invalidates)
 520                 bch2_do_invalidates(c);
 521
 522 #ifdef CONFIG_BCACHEFS_TESTS
 523         if (attr == &sysfs_perf_test) {
 524                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 525                 char *test              = strsep(&p, " \t\n");
 526                 char *nr_str            = strsep(&p, " \t\n");
 527                 char *threads_str       = strsep(&p, " \t\n");
 528                 unsigned threads;
 529                 u64 nr;
 530                 int ret = -EINVAL;
 531
 532                 if (threads_str &&
 533                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 534                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 535                         ret = bch2_btree_perf_test(c, test, nr, threads);
 536                 kfree(tmp);
 537
 538                 if (ret)
 539                         size = ret;
 540         }
 541 #endif
 542         return size;
 543 }
 544 SYSFS_OPS(bch2_fs);
 545
 546 struct attribute *bch2_fs_files[] = {
 547         &sysfs_minor,
 548         &sysfs_btree_cache_size,
 549         &sysfs_btree_write_stats,
 550
 551         &sysfs_promote_whole_extents,
 552
 553         &sysfs_compression_stats,
 554
 555 #ifdef CONFIG_BCACHEFS_TESTS
 556         &sysfs_perf_test,
 557 #endif
 558         NULL
 559 };
 560
 561 /* counters dir */
 562
 563 SHOW(bch2_fs_counters)
 564 {
 565         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 566         u64 counter = 0;
 567         u64 counter_since_mount = 0;
 568
 569         printbuf_tabstop_push(out, 32);
 570
 571         #define x(t, ...) \
 572                 if (attr == &sysfs_##t) {                                       \
 573                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 574                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 575                         prt_printf(out, "since mount:");                                \
 576                         prt_tab(out);                                           \
 577                         prt_human_readable_u64(out, counter_since_mount);       \
 578                         prt_newline(out);                                       \
 579                                                                                 \
 580                         prt_printf(out, "since filesystem creation:");          \
 581                         prt_tab(out);                                           \
 582                         prt_human_readable_u64(out, counter);                   \
 583                         prt_newline(out);                                       \
 584                 }
 585         BCH_PERSISTENT_COUNTERS()
 586         #undef x
 587         return 0;
 588 }
 589
 590 STORE(bch2_fs_counters) {
 591         return 0;
 592 }
 593
 594 SYSFS_OPS(bch2_fs_counters);
 595
 596 struct attribute *bch2_fs_counters_files[] = {
 597 #define x(t, ...) \
 598         &sysfs_##t,
 599         BCH_PERSISTENT_COUNTERS()
 600 #undef x
 601         NULL
 602 };
 603 /* internal dir - just a wrapper */
 604
 605 SHOW(bch2_fs_internal)
 606 {
 607         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 608
 609         return bch2_fs_to_text(out, &c->kobj, attr);
 610 }
 611
 612 STORE(bch2_fs_internal)
 613 {
 614         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 615
 616         return bch2_fs_store(&c->kobj, attr, buf, size);
 617 }
 618 SYSFS_OPS(bch2_fs_internal);
 619
 620 struct attribute *bch2_fs_internal_files[] = {
 621         &sysfs_journal_debug,
 622         &sysfs_btree_updates,
 623         &sysfs_btree_cache,
 624         &sysfs_btree_key_cache,
 625         &sysfs_new_stripes,
 626         &sysfs_stripes_heap,
 627         &sysfs_open_buckets,
 628         &sysfs_open_buckets_partial,
 629         &sysfs_write_points,
 630 #ifdef BCH_WRITE_REF_DEBUG
 631         &sysfs_write_refs,
 632 #endif
 633         &sysfs_nocow_lock_table,
 634         &sysfs_io_timers_read,
 635         &sysfs_io_timers_write,
 636
 637         &sysfs_trigger_gc,
 638         &sysfs_trigger_discards,
 639         &sysfs_trigger_invalidates,
 640         &sysfs_prune_cache,
 641         &sysfs_btree_wakeup,
 642
 643         &sysfs_gc_gens_pos,
 644
 645         &sysfs_copy_gc_enabled,
 646         &sysfs_copy_gc_wait,
 647
 648         &sysfs_rebalance_enabled,
 649         &sysfs_rebalance_status,
 650         sysfs_pd_controller_files(rebalance),
 651
 652         &sysfs_moving_ctxts,
 653
 654         &sysfs_internal_uuid,
 655
 656         &sysfs_disk_groups,
 657         NULL
 658 };
 659
 660 /* options */
 661
 662 SHOW(bch2_fs_opts_dir)
 663 {
 664         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 665         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 666         int id = opt - bch2_opt_table;
 667         u64 v = bch2_opt_get_by_id(&c->opts, id);
 668
 669         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 670         prt_char(out, '\n');
 671
 672         return 0;
 673 }
 674
 675 STORE(bch2_fs_opts_dir)
 676 {
 677         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 678         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 679         int ret, id = opt - bch2_opt_table;
 680         char *tmp;
 681         u64 v;
 682
 683         /*
 684          * We don't need to take c->writes for correctness, but it eliminates an
 685          * unsightly error message in the dmesg log when we're RO:
 686          */
 687         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 688                 return -EROFS;
 689
 690         tmp = kstrdup(buf, GFP_KERNEL);
 691         if (!tmp) {
 692                 ret = -ENOMEM;
 693                 goto err;
 694         }
 695
 696         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 697         kfree(tmp);
 698
 699         if (ret < 0)
 700                 goto err;
 701
 702         ret = bch2_opt_check_may_set(c, id, v);
 703         if (ret < 0)
 704                 goto err;
 705
 706         bch2_opt_set_sb(c, opt, v);
 707         bch2_opt_set_by_id(&c->opts, id, v);
 708
 709         if ((id == Opt_background_target ||
 710              id == Opt_background_compression) && v)
 711                 bch2_set_rebalance_needs_scan(c, 0);
 712
 713         ret = size;
 714 err:
 715         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 716         return ret;
 717 }
 718 SYSFS_OPS(bch2_fs_opts_dir);
 719
 720 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 721
 722 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 723 {
 724         const struct bch_option *i;
 725         int ret;
 726
 727         for (i = bch2_opt_table;
 728              i < bch2_opt_table + bch2_opts_nr;
 729              i++) {
 730                 if (!(i->flags & OPT_FS))
 731                         continue;
 732
 733                 ret = sysfs_create_file(kobj, &i->attr);
 734                 if (ret)
 735                         return ret;
 736         }
 737
 738         return 0;
 739 }
 740
 741 /* time stats */
 742
 743 SHOW(bch2_fs_time_stats)
 744 {
 745         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 746
 747 #define x(name)                                                         \
 748         if (attr == &sysfs_time_stat_##name)                            \
 749                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 750         BCH_TIME_STATS()
 751 #undef x
 752
 753         return 0;
 754 }
 755
 756 STORE(bch2_fs_time_stats)
 757 {
 758         return size;
 759 }
 760 SYSFS_OPS(bch2_fs_time_stats);
 761
 762 struct attribute *bch2_fs_time_stats_files[] = {
 763 #define x(name)                                         \
 764         &sysfs_time_stat_##name,
 765         BCH_TIME_STATS()
 766 #undef x
 767         NULL
 768 };
 769
 770 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 771 {
 772         struct bch_fs *c = ca->fs;
 773         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 774         unsigned i, nr[BCH_DATA_NR];
 775
 776         memset(nr, 0, sizeof(nr));
 777
 778         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 779                 nr[c->open_buckets[i].data_type]++;
 780
 781         printbuf_tabstop_push(out, 8);
 782         printbuf_tabstop_push(out, 16);
 783         printbuf_tabstop_push(out, 16);
 784         printbuf_tabstop_push(out, 16);
 785         printbuf_tabstop_push(out, 16);
 786
 787         prt_tab(out);
 788         prt_str(out, "buckets");
 789         prt_tab_rjust(out);
 790         prt_str(out, "sectors");
 791         prt_tab_rjust(out);
 792         prt_str(out, "fragmented");
 793         prt_tab_rjust(out);
 794         prt_newline(out);
 795
 796         for (i = 0; i < BCH_DATA_NR; i++) {
 797                 prt_str(out, bch2_data_types[i]);
 798                 prt_tab(out);
 799                 prt_u64(out, stats.d[i].buckets);
 800                 prt_tab_rjust(out);
 801                 prt_u64(out, stats.d[i].sectors);
 802                 prt_tab_rjust(out);
 803                 prt_u64(out, stats.d[i].fragmented);
 804                 prt_tab_rjust(out);
 805                 prt_newline(out);
 806         }
 807
 808         prt_str(out, "ec");
 809         prt_tab(out);
 810         prt_u64(out, stats.buckets_ec);
 811         prt_tab_rjust(out);
 812         prt_newline(out);
 813
 814         prt_newline(out);
 815
 816         prt_printf(out, "reserves:");
 817         prt_newline(out);
 818         for (i = 0; i < BCH_WATERMARK_NR; i++) {
 819                 prt_str(out, bch2_watermarks[i]);
 820                 prt_tab(out);
 821                 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
 822                 prt_tab_rjust(out);
 823                 prt_newline(out);
 824         }
 825
 826         prt_newline(out);
 827
 828         printbuf_tabstops_reset(out);
 829         printbuf_tabstop_push(out, 24);
 830
 831         prt_str(out, "freelist_wait");
 832         prt_tab(out);
 833         prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
 834         prt_newline(out);
 835
 836         prt_str(out, "open buckets allocated");
 837         prt_tab(out);
 838         prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
 839         prt_newline(out);
 840
 841         prt_str(out, "open buckets this dev");
 842         prt_tab(out);
 843         prt_u64(out, ca->nr_open_buckets);
 844         prt_newline(out);
 845
 846         prt_str(out, "open buckets total");
 847         prt_tab(out);
 848         prt_u64(out, OPEN_BUCKETS_COUNT);
 849         prt_newline(out);
 850
 851         prt_str(out, "open_buckets_wait");
 852         prt_tab(out);
 853         prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
 854         prt_newline(out);
 855
 856         prt_str(out, "open_buckets_btree");
 857         prt_tab(out);
 858         prt_u64(out, nr[BCH_DATA_btree]);
 859         prt_newline(out);
 860
 861         prt_str(out, "open_buckets_user");
 862         prt_tab(out);
 863         prt_u64(out, nr[BCH_DATA_user]);
 864         prt_newline(out);
 865
 866         prt_str(out, "buckets_to_invalidate");
 867         prt_tab(out);
 868         prt_u64(out, should_invalidate_buckets(ca, stats));
 869         prt_newline(out);
 870
 871         prt_str(out, "btree reserve cache");
 872         prt_tab(out);
 873         prt_u64(out, c->btree_reserve_cache_nr);
 874         prt_newline(out);
 875 }
 876
 877 static const char * const bch2_rw[] = {
 878         "read",
 879         "write",
 880         NULL
 881 };
 882
 883 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 884 {
 885         int rw, i;
 886
 887         for (rw = 0; rw < 2; rw++) {
 888                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 889
 890                 for (i = 1; i < BCH_DATA_NR; i++)
 891                         prt_printf(out, "%-12s:%12llu\n",
 892                                bch2_data_types[i],
 893                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 894         }
 895 }
 896
 897 SHOW(bch2_dev)
 898 {
 899         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 900         struct bch_fs *c = ca->fs;
 901
 902         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 903
 904         sysfs_print(bucket_size,        bucket_bytes(ca));
 905         sysfs_print(first_bucket,       ca->mi.first_bucket);
 906         sysfs_print(nbuckets,           ca->mi.nbuckets);
 907         sysfs_print(durability,         ca->mi.durability);
 908         sysfs_print(discard,            ca->mi.discard);
 909
 910         if (attr == &sysfs_label) {
 911                 if (ca->mi.group)
 912                         bch2_disk_path_to_text(out, c, ca->mi.group - 1);
 913                 prt_char(out, '\n');
 914         }
 915
 916         if (attr == &sysfs_has_data) {
 917                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 918                 prt_char(out, '\n');
 919         }
 920
 921         if (attr == &sysfs_state_rw) {
 922                 prt_string_option(out, bch2_member_states, ca->mi.state);
 923                 prt_char(out, '\n');
 924         }
 925
 926         if (attr == &sysfs_iodone)
 927                 dev_iodone_to_text(out, ca);
 928
 929         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 930         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 931
 932         if (attr == &sysfs_io_latency_stats_read)
 933                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 934
 935         if (attr == &sysfs_io_latency_stats_write)
 936                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 937
 938         sysfs_printf(congested,                 "%u%%",
 939                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 940                      * 100 / CONGESTED_MAX);
 941
 942         if (attr == &sysfs_alloc_debug)
 943                 dev_alloc_debug_to_text(out, ca);
 944
 945         return 0;
 946 }
 947
 948 STORE(bch2_dev)
 949 {
 950         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 951         struct bch_fs *c = ca->fs;
 952         struct bch_member *mi;
 953
 954         if (attr == &sysfs_discard) {
 955                 bool v = strtoul_or_return(buf);
 956
 957                 mutex_lock(&c->sb_lock);
 958                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 959
 960                 if (v != BCH_MEMBER_DISCARD(mi)) {
 961                         SET_BCH_MEMBER_DISCARD(mi, v);
 962                         bch2_write_super(c);
 963                 }
 964                 mutex_unlock(&c->sb_lock);
 965         }
 966
 967         if (attr == &sysfs_durability) {
 968                 u64 v = strtoul_or_return(buf);
 969
 970                 mutex_lock(&c->sb_lock);
 971                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 972
 973                 if (v + 1 != BCH_MEMBER_DURABILITY(mi)) {
 974                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 975                         bch2_write_super(c);
 976                 }
 977                 mutex_unlock(&c->sb_lock);
 978         }
 979
 980         if (attr == &sysfs_label) {
 981                 char *tmp;
 982                 int ret;
 983
 984                 tmp = kstrdup(buf, GFP_KERNEL);
 985                 if (!tmp)
 986                         return -ENOMEM;
 987
 988                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 989                 kfree(tmp);
 990                 if (ret)
 991                         return ret;
 992         }
 993
 994         return size;
 995 }
 996 SYSFS_OPS(bch2_dev);
 997
 998 struct attribute *bch2_dev_files[] = {
 999         &sysfs_uuid,
1000         &sysfs_bucket_size,
1001         &sysfs_first_bucket,
1002         &sysfs_nbuckets,
1003         &sysfs_durability,
1004
1005         /* settings: */
1006         &sysfs_discard,
1007         &sysfs_state_rw,
1008         &sysfs_label,
1009
1010         &sysfs_has_data,
1011         &sysfs_iodone,
1012
1013         &sysfs_io_latency_read,
1014         &sysfs_io_latency_write,
1015         &sysfs_io_latency_stats_read,
1016         &sysfs_io_latency_stats_write,
1017         &sysfs_congested,
1018
1019         /* debug: */
1020         &sysfs_alloc_debug,
1021         NULL
1022 };
1023
1024 #endif  /* _BCACHEFS_SYSFS_H_ */