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(io_done);
 153 read_attribute(io_errors);
 154 write_attribute(io_errors_reset);
 155
 156 read_attribute(io_latency_read);
 157 read_attribute(io_latency_write);
 158 read_attribute(io_latency_stats_read);
 159 read_attribute(io_latency_stats_write);
 160 read_attribute(congested);
 161
 162 read_attribute(btree_write_stats);
 163
 164 read_attribute(btree_cache_size);
 165 read_attribute(compression_stats);
 166 read_attribute(journal_debug);
 167 read_attribute(btree_updates);
 168 read_attribute(btree_cache);
 169 read_attribute(btree_key_cache);
 170 read_attribute(stripes_heap);
 171 read_attribute(open_buckets);
 172 read_attribute(open_buckets_partial);
 173 read_attribute(write_points);
 174 read_attribute(nocow_lock_table);
 175
 176 #ifdef BCH_WRITE_REF_DEBUG
 177 read_attribute(write_refs);
 178
 179 static const char * const bch2_write_refs[] = {
 180 #define x(n)    #n,
 181         BCH_WRITE_REFS()
 182 #undef x
 183         NULL
 184 };
 185
 186 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 187 {
 188         bch2_printbuf_tabstop_push(out, 24);
 189
 190         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 191                 prt_str(out, bch2_write_refs[i]);
 192                 prt_tab(out);
 193                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 194                 prt_newline(out);
 195         }
 196 }
 197 #endif
 198
 199 read_attribute(internal_uuid);
 200 read_attribute(disk_groups);
 201
 202 read_attribute(has_data);
 203 read_attribute(alloc_debug);
 204
 205 #define x(t, n, ...) read_attribute(t);
 206 BCH_PERSISTENT_COUNTERS()
 207 #undef x
 208
 209 rw_attribute(discard);
 210 rw_attribute(label);
 211
 212 rw_attribute(copy_gc_enabled);
 213 read_attribute(copy_gc_wait);
 214
 215 rw_attribute(rebalance_enabled);
 216 sysfs_pd_controller_attribute(rebalance);
 217 read_attribute(rebalance_status);
 218 rw_attribute(promote_whole_extents);
 219
 220 read_attribute(new_stripes);
 221
 222 read_attribute(io_timers_read);
 223 read_attribute(io_timers_write);
 224
 225 read_attribute(moving_ctxts);
 226
 227 #ifdef CONFIG_BCACHEFS_TESTS
 228 write_attribute(perf_test);
 229 #endif /* CONFIG_BCACHEFS_TESTS */
 230
 231 #define x(_name)                                                \
 232         static struct attribute sysfs_time_stat_##_name =               \
 233                 { .name = #_name, .mode = 0444 };
 234         BCH_TIME_STATS()
 235 #undef x
 236
 237 static struct attribute sysfs_state_rw = {
 238         .name = "state",
 239         .mode =  0444,
 240 };
 241
 242 static size_t bch2_btree_cache_size(struct bch_fs *c)
 243 {
 244         size_t ret = 0;
 245         struct btree *b;
 246
 247         mutex_lock(&c->btree_cache.lock);
 248         list_for_each_entry(b, &c->btree_cache.live, list)
 249                 ret += btree_bytes(c);
 250
 251         mutex_unlock(&c->btree_cache.lock);
 252         return ret;
 253 }
 254
 255 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 256 {
 257         struct btree_trans *trans;
 258         struct btree_iter iter;
 259         struct bkey_s_c k;
 260         enum btree_id id;
 261         struct compression_type_stats {
 262                 u64             nr_extents;
 263                 u64             sectors_compressed;
 264                 u64             sectors_uncompressed;
 265         } s[BCH_COMPRESSION_TYPE_NR];
 266         u64 compressed_incompressible = 0;
 267         int ret = 0;
 268
 269         memset(s, 0, sizeof(s));
 270
 271         if (!test_bit(BCH_FS_STARTED, &c->flags))
 272                 return -EPERM;
 273
 274         trans = bch2_trans_get(c);
 275
 276         for (id = 0; id < BTREE_ID_NR; id++) {
 277                 if (!btree_type_has_ptrs(id))
 278                         continue;
 279
 280                 for_each_btree_key(trans, iter, id, POS_MIN,
 281                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 282                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 283                         struct bch_extent_crc_unpacked crc;
 284                         const union bch_extent_entry *entry;
 285                         bool compressed = false, incompressible = false;
 286
 287                         bkey_for_each_crc(k.k, ptrs, crc, entry) {
 288                                 incompressible  |= crc.compression_type == BCH_COMPRESSION_TYPE_incompressible;
 289                                 compressed      |= crc_is_compressed(crc);
 290
 291                                 if (crc_is_compressed(crc)) {
 292                                         s[crc.compression_type].nr_extents++;
 293                                         s[crc.compression_type].sectors_compressed += crc.compressed_size;
 294                                         s[crc.compression_type].sectors_uncompressed += crc.uncompressed_size;
 295                                 }
 296                         }
 297
 298                         compressed_incompressible += compressed && incompressible;
 299
 300                         if (!compressed) {
 301                                 unsigned t = incompressible ? BCH_COMPRESSION_TYPE_incompressible : 0;
 302
 303                                 s[t].nr_extents++;
 304                                 s[t].sectors_compressed += k.k->size;
 305                                 s[t].sectors_uncompressed += k.k->size;
 306                         }
 307                 }
 308                 bch2_trans_iter_exit(trans, &iter);
 309         }
 310
 311         bch2_trans_put(trans);
 312
 313         if (ret)
 314                 return ret;
 315
 316         prt_str(out, "type");
 317         printbuf_tabstop_push(out, 12);
 318         prt_tab(out);
 319
 320         prt_str(out, "compressed");
 321         printbuf_tabstop_push(out, 16);
 322         prt_tab_rjust(out);
 323
 324         prt_str(out, "uncompressed");
 325         printbuf_tabstop_push(out, 16);
 326         prt_tab_rjust(out);
 327
 328         prt_str(out, "average extent size");
 329         printbuf_tabstop_push(out, 24);
 330         prt_tab_rjust(out);
 331         prt_newline(out);
 332
 333         for (unsigned i = 0; i < ARRAY_SIZE(s); i++) {
 334                 prt_str(out, bch2_compression_types[i]);
 335                 prt_tab(out);
 336
 337                 prt_human_readable_u64(out, s[i].sectors_compressed << 9);
 338                 prt_tab_rjust(out);
 339
 340                 prt_human_readable_u64(out, s[i].sectors_uncompressed << 9);
 341                 prt_tab_rjust(out);
 342
 343                 prt_human_readable_u64(out, s[i].nr_extents
 344                                        ? div_u64(s[i].sectors_uncompressed << 9, s[i].nr_extents)
 345                                        : 0);
 346                 prt_tab_rjust(out);
 347                 prt_newline(out);
 348         }
 349
 350         if (compressed_incompressible) {
 351                 prt_printf(out, "%llu compressed & incompressible extents", compressed_incompressible);
 352                 prt_newline(out);
 353         }
 354
 355         return 0;
 356 }
 357
 358 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 359 {
 360         prt_printf(out, "%s: ", bch2_btree_id_str(c->gc_gens_btree));
 361         bch2_bpos_to_text(out, c->gc_gens_pos);
 362         prt_printf(out, "\n");
 363 }
 364
 365 static void bch2_btree_wakeup_all(struct bch_fs *c)
 366 {
 367         struct btree_trans *trans;
 368
 369         seqmutex_lock(&c->btree_trans_lock);
 370         list_for_each_entry(trans, &c->btree_trans_list, list) {
 371                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 372
 373                 if (b)
 374                         six_lock_wakeup_all(&b->lock);
 375
 376         }
 377         seqmutex_unlock(&c->btree_trans_lock);
 378 }
 379
 380 SHOW(bch2_fs)
 381 {
 382         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 383
 384         sysfs_print(minor,                      c->minor);
 385         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 386
 387         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 388
 389         if (attr == &sysfs_btree_write_stats)
 390                 bch2_btree_write_stats_to_text(out, c);
 391
 392         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 393
 394         if (attr == &sysfs_gc_gens_pos)
 395                 bch2_gc_gens_pos_to_text(out, c);
 396
 397         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 398
 399         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 400         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 401
 402         if (attr == &sysfs_copy_gc_wait)
 403                 bch2_copygc_wait_to_text(out, c);
 404
 405         if (attr == &sysfs_rebalance_status)
 406                 bch2_rebalance_status_to_text(out, c);
 407
 408         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 409
 410         /* Debugging: */
 411
 412         if (attr == &sysfs_journal_debug)
 413                 bch2_journal_debug_to_text(out, &c->journal);
 414
 415         if (attr == &sysfs_btree_updates)
 416                 bch2_btree_updates_to_text(out, c);
 417
 418         if (attr == &sysfs_btree_cache)
 419                 bch2_btree_cache_to_text(out, &c->btree_cache);
 420
 421         if (attr == &sysfs_btree_key_cache)
 422                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 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_open_buckets_partial)
 431                 bch2_open_buckets_partial_to_text(out, c);
 432
 433         if (attr == &sysfs_write_points)
 434                 bch2_write_points_to_text(out, c);
 435
 436         if (attr == &sysfs_compression_stats)
 437                 bch2_compression_stats_to_text(out, c);
 438
 439         if (attr == &sysfs_new_stripes)
 440                 bch2_new_stripes_to_text(out, c);
 441
 442         if (attr == &sysfs_io_timers_read)
 443                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 444
 445         if (attr == &sysfs_io_timers_write)
 446                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 447
 448         if (attr == &sysfs_moving_ctxts)
 449                 bch2_fs_moving_ctxts_to_text(out, c);
 450
 451 #ifdef BCH_WRITE_REF_DEBUG
 452         if (attr == &sysfs_write_refs)
 453                 bch2_write_refs_to_text(out, c);
 454 #endif
 455
 456         if (attr == &sysfs_nocow_lock_table)
 457                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 458
 459         if (attr == &sysfs_disk_groups)
 460                 bch2_disk_groups_to_text(out, c);
 461
 462         return 0;
 463 }
 464
 465 STORE(bch2_fs)
 466 {
 467         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 468
 469         if (attr == &sysfs_btree_gc_periodic) {
 470                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 471                         ?: (ssize_t) size;
 472
 473                 wake_up_process(c->gc_thread);
 474                 return ret;
 475         }
 476
 477         if (attr == &sysfs_copy_gc_enabled) {
 478                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 479                         ?: (ssize_t) size;
 480
 481                 if (c->copygc_thread)
 482                         wake_up_process(c->copygc_thread);
 483                 return ret;
 484         }
 485
 486         if (attr == &sysfs_rebalance_enabled) {
 487                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 488                         ?: (ssize_t) size;
 489
 490                 rebalance_wakeup(c);
 491                 return ret;
 492         }
 493
 494         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 495
 496         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 497
 498         /* Debugging: */
 499
 500         if (!test_bit(BCH_FS_STARTED, &c->flags))
 501                 return -EPERM;
 502
 503         /* Debugging: */
 504
 505         if (!test_bit(BCH_FS_RW, &c->flags))
 506                 return -EROFS;
 507
 508         if (attr == &sysfs_prune_cache) {
 509                 struct shrink_control sc;
 510
 511                 sc.gfp_mask = GFP_KERNEL;
 512                 sc.nr_to_scan = strtoul_or_return(buf);
 513                 c->btree_cache.shrink->scan_objects(c->btree_cache.shrink, &sc);
 514         }
 515
 516         if (attr == &sysfs_btree_wakeup)
 517                 bch2_btree_wakeup_all(c);
 518
 519         if (attr == &sysfs_trigger_gc) {
 520                 /*
 521                  * Full gc is currently incompatible with btree key cache:
 522                  */
 523 #if 0
 524                 down_read(&c->state_lock);
 525                 bch2_gc(c, false, false);
 526                 up_read(&c->state_lock);
 527 #else
 528                 bch2_gc_gens(c);
 529 #endif
 530         }
 531
 532         if (attr == &sysfs_trigger_discards)
 533                 bch2_do_discards(c);
 534
 535         if (attr == &sysfs_trigger_invalidates)
 536                 bch2_do_invalidates(c);
 537
 538 #ifdef CONFIG_BCACHEFS_TESTS
 539         if (attr == &sysfs_perf_test) {
 540                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 541                 char *test              = strsep(&p, " \t\n");
 542                 char *nr_str            = strsep(&p, " \t\n");
 543                 char *threads_str       = strsep(&p, " \t\n");
 544                 unsigned threads;
 545                 u64 nr;
 546                 int ret = -EINVAL;
 547
 548                 if (threads_str &&
 549                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 550                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 551                         ret = bch2_btree_perf_test(c, test, nr, threads);
 552                 kfree(tmp);
 553
 554                 if (ret)
 555                         size = ret;
 556         }
 557 #endif
 558         return size;
 559 }
 560 SYSFS_OPS(bch2_fs);
 561
 562 struct attribute *bch2_fs_files[] = {
 563         &sysfs_minor,
 564         &sysfs_btree_cache_size,
 565         &sysfs_btree_write_stats,
 566
 567         &sysfs_promote_whole_extents,
 568
 569         &sysfs_compression_stats,
 570
 571 #ifdef CONFIG_BCACHEFS_TESTS
 572         &sysfs_perf_test,
 573 #endif
 574         NULL
 575 };
 576
 577 /* counters dir */
 578
 579 SHOW(bch2_fs_counters)
 580 {
 581         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 582         u64 counter = 0;
 583         u64 counter_since_mount = 0;
 584
 585         printbuf_tabstop_push(out, 32);
 586
 587         #define x(t, ...) \
 588                 if (attr == &sysfs_##t) {                                       \
 589                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 590                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 591                         prt_printf(out, "since mount:");                                \
 592                         prt_tab(out);                                           \
 593                         prt_human_readable_u64(out, counter_since_mount);       \
 594                         prt_newline(out);                                       \
 595                                                                                 \
 596                         prt_printf(out, "since filesystem creation:");          \
 597                         prt_tab(out);                                           \
 598                         prt_human_readable_u64(out, counter);                   \
 599                         prt_newline(out);                                       \
 600                 }
 601         BCH_PERSISTENT_COUNTERS()
 602         #undef x
 603         return 0;
 604 }
 605
 606 STORE(bch2_fs_counters) {
 607         return 0;
 608 }
 609
 610 SYSFS_OPS(bch2_fs_counters);
 611
 612 struct attribute *bch2_fs_counters_files[] = {
 613 #define x(t, ...) \
 614         &sysfs_##t,
 615         BCH_PERSISTENT_COUNTERS()
 616 #undef x
 617         NULL
 618 };
 619 /* internal dir - just a wrapper */
 620
 621 SHOW(bch2_fs_internal)
 622 {
 623         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 624
 625         return bch2_fs_to_text(out, &c->kobj, attr);
 626 }
 627
 628 STORE(bch2_fs_internal)
 629 {
 630         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 631
 632         return bch2_fs_store(&c->kobj, attr, buf, size);
 633 }
 634 SYSFS_OPS(bch2_fs_internal);
 635
 636 struct attribute *bch2_fs_internal_files[] = {
 637         &sysfs_journal_debug,
 638         &sysfs_btree_updates,
 639         &sysfs_btree_cache,
 640         &sysfs_btree_key_cache,
 641         &sysfs_new_stripes,
 642         &sysfs_stripes_heap,
 643         &sysfs_open_buckets,
 644         &sysfs_open_buckets_partial,
 645         &sysfs_write_points,
 646 #ifdef BCH_WRITE_REF_DEBUG
 647         &sysfs_write_refs,
 648 #endif
 649         &sysfs_nocow_lock_table,
 650         &sysfs_io_timers_read,
 651         &sysfs_io_timers_write,
 652
 653         &sysfs_trigger_gc,
 654         &sysfs_trigger_discards,
 655         &sysfs_trigger_invalidates,
 656         &sysfs_prune_cache,
 657         &sysfs_btree_wakeup,
 658
 659         &sysfs_gc_gens_pos,
 660
 661         &sysfs_copy_gc_enabled,
 662         &sysfs_copy_gc_wait,
 663
 664         &sysfs_rebalance_enabled,
 665         &sysfs_rebalance_status,
 666         sysfs_pd_controller_files(rebalance),
 667
 668         &sysfs_moving_ctxts,
 669
 670         &sysfs_internal_uuid,
 671
 672         &sysfs_disk_groups,
 673         NULL
 674 };
 675
 676 /* options */
 677
 678 SHOW(bch2_fs_opts_dir)
 679 {
 680         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 681         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 682         int id = opt - bch2_opt_table;
 683         u64 v = bch2_opt_get_by_id(&c->opts, id);
 684
 685         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 686         prt_char(out, '\n');
 687
 688         return 0;
 689 }
 690
 691 STORE(bch2_fs_opts_dir)
 692 {
 693         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 694         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 695         int ret, id = opt - bch2_opt_table;
 696         char *tmp;
 697         u64 v;
 698
 699         /*
 700          * We don't need to take c->writes for correctness, but it eliminates an
 701          * unsightly error message in the dmesg log when we're RO:
 702          */
 703         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 704                 return -EROFS;
 705
 706         tmp = kstrdup(buf, GFP_KERNEL);
 707         if (!tmp) {
 708                 ret = -ENOMEM;
 709                 goto err;
 710         }
 711
 712         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 713         kfree(tmp);
 714
 715         if (ret < 0)
 716                 goto err;
 717
 718         ret = bch2_opt_check_may_set(c, id, v);
 719         if (ret < 0)
 720                 goto err;
 721
 722         bch2_opt_set_sb(c, opt, v);
 723         bch2_opt_set_by_id(&c->opts, id, v);
 724
 725         if ((id == Opt_background_target ||
 726              id == Opt_background_compression) && v)
 727                 bch2_set_rebalance_needs_scan(c, 0);
 728
 729         ret = size;
 730 err:
 731         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 732         return ret;
 733 }
 734 SYSFS_OPS(bch2_fs_opts_dir);
 735
 736 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 737
 738 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 739 {
 740         const struct bch_option *i;
 741         int ret;
 742
 743         for (i = bch2_opt_table;
 744              i < bch2_opt_table + bch2_opts_nr;
 745              i++) {
 746                 if (!(i->flags & OPT_FS))
 747                         continue;
 748
 749                 ret = sysfs_create_file(kobj, &i->attr);
 750                 if (ret)
 751                         return ret;
 752         }
 753
 754         return 0;
 755 }
 756
 757 /* time stats */
 758
 759 SHOW(bch2_fs_time_stats)
 760 {
 761         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 762
 763 #define x(name)                                                         \
 764         if (attr == &sysfs_time_stat_##name)                            \
 765                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 766         BCH_TIME_STATS()
 767 #undef x
 768
 769         return 0;
 770 }
 771
 772 STORE(bch2_fs_time_stats)
 773 {
 774         return size;
 775 }
 776 SYSFS_OPS(bch2_fs_time_stats);
 777
 778 struct attribute *bch2_fs_time_stats_files[] = {
 779 #define x(name)                                         \
 780         &sysfs_time_stat_##name,
 781         BCH_TIME_STATS()
 782 #undef x
 783         NULL
 784 };
 785
 786 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 787 {
 788         struct bch_fs *c = ca->fs;
 789         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 790         unsigned i, nr[BCH_DATA_NR];
 791
 792         memset(nr, 0, sizeof(nr));
 793
 794         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 795                 nr[c->open_buckets[i].data_type]++;
 796
 797         printbuf_tabstop_push(out, 8);
 798         printbuf_tabstop_push(out, 16);
 799         printbuf_tabstop_push(out, 16);
 800         printbuf_tabstop_push(out, 16);
 801         printbuf_tabstop_push(out, 16);
 802
 803         bch2_dev_usage_to_text(out, &stats);
 804
 805         prt_newline(out);
 806
 807         prt_printf(out, "reserves:");
 808         prt_newline(out);
 809         for (i = 0; i < BCH_WATERMARK_NR; i++) {
 810                 prt_str(out, bch2_watermarks[i]);
 811                 prt_tab(out);
 812                 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
 813                 prt_tab_rjust(out);
 814                 prt_newline(out);
 815         }
 816
 817         prt_newline(out);
 818
 819         printbuf_tabstops_reset(out);
 820         printbuf_tabstop_push(out, 24);
 821
 822         prt_str(out, "freelist_wait");
 823         prt_tab(out);
 824         prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
 825         prt_newline(out);
 826
 827         prt_str(out, "open buckets allocated");
 828         prt_tab(out);
 829         prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
 830         prt_newline(out);
 831
 832         prt_str(out, "open buckets this dev");
 833         prt_tab(out);
 834         prt_u64(out, ca->nr_open_buckets);
 835         prt_newline(out);
 836
 837         prt_str(out, "open buckets total");
 838         prt_tab(out);
 839         prt_u64(out, OPEN_BUCKETS_COUNT);
 840         prt_newline(out);
 841
 842         prt_str(out, "open_buckets_wait");
 843         prt_tab(out);
 844         prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
 845         prt_newline(out);
 846
 847         prt_str(out, "open_buckets_btree");
 848         prt_tab(out);
 849         prt_u64(out, nr[BCH_DATA_btree]);
 850         prt_newline(out);
 851
 852         prt_str(out, "open_buckets_user");
 853         prt_tab(out);
 854         prt_u64(out, nr[BCH_DATA_user]);
 855         prt_newline(out);
 856
 857         prt_str(out, "buckets_to_invalidate");
 858         prt_tab(out);
 859         prt_u64(out, should_invalidate_buckets(ca, stats));
 860         prt_newline(out);
 861
 862         prt_str(out, "btree reserve cache");
 863         prt_tab(out);
 864         prt_u64(out, c->btree_reserve_cache_nr);
 865         prt_newline(out);
 866 }
 867
 868 static const char * const bch2_rw[] = {
 869         "read",
 870         "write",
 871         NULL
 872 };
 873
 874 static void dev_io_done_to_text(struct printbuf *out, struct bch_dev *ca)
 875 {
 876         int rw, i;
 877
 878         for (rw = 0; rw < 2; rw++) {
 879                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 880
 881                 for (i = 1; i < BCH_DATA_NR; i++)
 882                         prt_printf(out, "%-12s:%12llu\n",
 883                                bch2_data_types[i],
 884                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 885         }
 886 }
 887
 888 SHOW(bch2_dev)
 889 {
 890         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 891         struct bch_fs *c = ca->fs;
 892
 893         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 894
 895         sysfs_print(bucket_size,        bucket_bytes(ca));
 896         sysfs_print(first_bucket,       ca->mi.first_bucket);
 897         sysfs_print(nbuckets,           ca->mi.nbuckets);
 898         sysfs_print(durability,         ca->mi.durability);
 899         sysfs_print(discard,            ca->mi.discard);
 900
 901         if (attr == &sysfs_label) {
 902                 if (ca->mi.group)
 903                         bch2_disk_path_to_text(out, c, ca->mi.group - 1);
 904                 prt_char(out, '\n');
 905         }
 906
 907         if (attr == &sysfs_has_data) {
 908                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 909                 prt_char(out, '\n');
 910         }
 911
 912         if (attr == &sysfs_state_rw) {
 913                 prt_string_option(out, bch2_member_states, ca->mi.state);
 914                 prt_char(out, '\n');
 915         }
 916
 917         if (attr == &sysfs_io_done)
 918                 dev_io_done_to_text(out, ca);
 919
 920         if (attr == &sysfs_io_errors)
 921                 bch2_dev_io_errors_to_text(out, ca);
 922
 923         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 924         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 925
 926         if (attr == &sysfs_io_latency_stats_read)
 927                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 928
 929         if (attr == &sysfs_io_latency_stats_write)
 930                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 931
 932         sysfs_printf(congested,                 "%u%%",
 933                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 934                      * 100 / CONGESTED_MAX);
 935
 936         if (attr == &sysfs_alloc_debug)
 937                 dev_alloc_debug_to_text(out, ca);
 938
 939         return 0;
 940 }
 941
 942 STORE(bch2_dev)
 943 {
 944         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 945         struct bch_fs *c = ca->fs;
 946         struct bch_member *mi;
 947
 948         if (attr == &sysfs_discard) {
 949                 bool v = strtoul_or_return(buf);
 950
 951                 mutex_lock(&c->sb_lock);
 952                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 953
 954                 if (v != BCH_MEMBER_DISCARD(mi)) {
 955                         SET_BCH_MEMBER_DISCARD(mi, v);
 956                         bch2_write_super(c);
 957                 }
 958                 mutex_unlock(&c->sb_lock);
 959         }
 960
 961         if (attr == &sysfs_durability) {
 962                 u64 v = strtoul_or_return(buf);
 963
 964                 mutex_lock(&c->sb_lock);
 965                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 966
 967                 if (v + 1 != BCH_MEMBER_DURABILITY(mi)) {
 968                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 969                         bch2_write_super(c);
 970                 }
 971                 mutex_unlock(&c->sb_lock);
 972         }
 973
 974         if (attr == &sysfs_label) {
 975                 char *tmp;
 976                 int ret;
 977
 978                 tmp = kstrdup(buf, GFP_KERNEL);
 979                 if (!tmp)
 980                         return -ENOMEM;
 981
 982                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 983                 kfree(tmp);
 984                 if (ret)
 985                         return ret;
 986         }
 987
 988         if (attr == &sysfs_io_errors_reset)
 989                 bch2_dev_errors_reset(ca);
 990
 991         return size;
 992 }
 993 SYSFS_OPS(bch2_dev);
 994
 995 struct attribute *bch2_dev_files[] = {
 996         &sysfs_uuid,
 997         &sysfs_bucket_size,
 998         &sysfs_first_bucket,
 999         &sysfs_nbuckets,
1000         &sysfs_durability,
1001
1002         /* settings: */
1003         &sysfs_discard,
1004         &sysfs_state_rw,
1005         &sysfs_label,
1006
1007         &sysfs_has_data,
1008         &sysfs_io_done,
1009         &sysfs_io_errors,
1010         &sysfs_io_errors_reset,
1011
1012         &sysfs_io_latency_read,
1013         &sysfs_io_latency_write,
1014         &sysfs_io_latency_stats_read,
1015         &sysfs_io_latency_stats_write,
1016         &sysfs_congested,
1017
1018         /* debug: */
1019         &sysfs_alloc_debug,
1020         NULL
1021 };
1022
1023 #endif  /* _BCACHEFS_SYSFS_H_ */