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(flags);
 149 read_attribute(bucket_size);
 150 read_attribute(first_bucket);
 151 read_attribute(nbuckets);
 152 rw_attribute(durability);
 153 read_attribute(io_done);
 154 read_attribute(io_errors);
 155 write_attribute(io_errors_reset);
 156
 157 read_attribute(io_latency_read);
 158 read_attribute(io_latency_write);
 159 read_attribute(io_latency_stats_read);
 160 read_attribute(io_latency_stats_write);
 161 read_attribute(congested);
 162
 163 read_attribute(btree_write_stats);
 164
 165 read_attribute(btree_cache_size);
 166 read_attribute(compression_stats);
 167 read_attribute(journal_debug);
 168 read_attribute(btree_updates);
 169 read_attribute(btree_cache);
 170 read_attribute(btree_key_cache);
 171 read_attribute(stripes_heap);
 172 read_attribute(open_buckets);
 173 read_attribute(open_buckets_partial);
 174 read_attribute(write_points);
 175 read_attribute(nocow_lock_table);
 176
 177 #ifdef BCH_WRITE_REF_DEBUG
 178 read_attribute(write_refs);
 179
 180 static const char * const bch2_write_refs[] = {
 181 #define x(n)    #n,
 182         BCH_WRITE_REFS()
 183 #undef x
 184         NULL
 185 };
 186
 187 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 188 {
 189         bch2_printbuf_tabstop_push(out, 24);
 190
 191         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 192                 prt_str(out, bch2_write_refs[i]);
 193                 prt_tab(out);
 194                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 195                 prt_newline(out);
 196         }
 197 }
 198 #endif
 199
 200 read_attribute(internal_uuid);
 201 read_attribute(disk_groups);
 202
 203 read_attribute(has_data);
 204 read_attribute(alloc_debug);
 205
 206 #define x(t, n, ...) read_attribute(t);
 207 BCH_PERSISTENT_COUNTERS()
 208 #undef x
 209
 210 rw_attribute(discard);
 211 rw_attribute(label);
 212
 213 rw_attribute(copy_gc_enabled);
 214 read_attribute(copy_gc_wait);
 215
 216 rw_attribute(rebalance_enabled);
 217 sysfs_pd_controller_attribute(rebalance);
 218 read_attribute(rebalance_status);
 219 rw_attribute(promote_whole_extents);
 220
 221 read_attribute(new_stripes);
 222
 223 read_attribute(io_timers_read);
 224 read_attribute(io_timers_write);
 225
 226 read_attribute(moving_ctxts);
 227
 228 #ifdef CONFIG_BCACHEFS_TESTS
 229 write_attribute(perf_test);
 230 #endif /* CONFIG_BCACHEFS_TESTS */
 231
 232 #define x(_name)                                                \
 233         static struct attribute sysfs_time_stat_##_name =               \
 234                 { .name = #_name, .mode = 0444 };
 235         BCH_TIME_STATS()
 236 #undef x
 237
 238 static struct attribute sysfs_state_rw = {
 239         .name = "state",
 240         .mode =  0444,
 241 };
 242
 243 static size_t bch2_btree_cache_size(struct bch_fs *c)
 244 {
 245         size_t ret = 0;
 246         struct btree *b;
 247
 248         mutex_lock(&c->btree_cache.lock);
 249         list_for_each_entry(b, &c->btree_cache.live, list)
 250                 ret += btree_bytes(c);
 251
 252         mutex_unlock(&c->btree_cache.lock);
 253         return ret;
 254 }
 255
 256 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 257 {
 258         struct btree_trans *trans;
 259         enum btree_id id;
 260         struct compression_type_stats {
 261                 u64             nr_extents;
 262                 u64             sectors_compressed;
 263                 u64             sectors_uncompressed;
 264         } s[BCH_COMPRESSION_TYPE_NR];
 265         u64 compressed_incompressible = 0;
 266         int ret = 0;
 267
 268         memset(s, 0, sizeof(s));
 269
 270         if (!test_bit(BCH_FS_started, &c->flags))
 271                 return -EPERM;
 272
 273         trans = bch2_trans_get(c);
 274
 275         for (id = 0; id < BTREE_ID_NR; id++) {
 276                 if (!btree_type_has_ptrs(id))
 277                         continue;
 278
 279                 ret = for_each_btree_key(trans, iter, id, POS_MIN,
 280                                          BTREE_ITER_ALL_SNAPSHOTS, k, ({
 281                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 282                         struct bch_extent_crc_unpacked crc;
 283                         const union bch_extent_entry *entry;
 284                         bool compressed = false, incompressible = false;
 285
 286                         bkey_for_each_crc(k.k, ptrs, crc, entry) {
 287                                 incompressible  |= crc.compression_type == BCH_COMPRESSION_TYPE_incompressible;
 288                                 compressed      |= crc_is_compressed(crc);
 289
 290                                 if (crc_is_compressed(crc)) {
 291                                         s[crc.compression_type].nr_extents++;
 292                                         s[crc.compression_type].sectors_compressed += crc.compressed_size;
 293                                         s[crc.compression_type].sectors_uncompressed += crc.uncompressed_size;
 294                                 }
 295                         }
 296
 297                         compressed_incompressible += compressed && incompressible;
 298
 299                         if (!compressed) {
 300                                 unsigned t = incompressible ? BCH_COMPRESSION_TYPE_incompressible : 0;
 301
 302                                 s[t].nr_extents++;
 303                                 s[t].sectors_compressed += k.k->size;
 304                                 s[t].sectors_uncompressed += k.k->size;
 305                         }
 306                         0;
 307                 }));
 308         }
 309
 310         bch2_trans_put(trans);
 311
 312         if (ret)
 313                 return ret;
 314
 315         prt_str(out, "type");
 316         printbuf_tabstop_push(out, 12);
 317         prt_tab(out);
 318
 319         prt_str(out, "compressed");
 320         printbuf_tabstop_push(out, 16);
 321         prt_tab_rjust(out);
 322
 323         prt_str(out, "uncompressed");
 324         printbuf_tabstop_push(out, 16);
 325         prt_tab_rjust(out);
 326
 327         prt_str(out, "average extent size");
 328         printbuf_tabstop_push(out, 24);
 329         prt_tab_rjust(out);
 330         prt_newline(out);
 331
 332         for (unsigned i = 0; i < ARRAY_SIZE(s); i++) {
 333                 prt_str(out, bch2_compression_types[i]);
 334                 prt_tab(out);
 335
 336                 prt_human_readable_u64(out, s[i].sectors_compressed << 9);
 337                 prt_tab_rjust(out);
 338
 339                 prt_human_readable_u64(out, s[i].sectors_uncompressed << 9);
 340                 prt_tab_rjust(out);
 341
 342                 prt_human_readable_u64(out, s[i].nr_extents
 343                                        ? div_u64(s[i].sectors_uncompressed << 9, s[i].nr_extents)
 344                                        : 0);
 345                 prt_tab_rjust(out);
 346                 prt_newline(out);
 347         }
 348
 349         if (compressed_incompressible) {
 350                 prt_printf(out, "%llu compressed & incompressible extents", compressed_incompressible);
 351                 prt_newline(out);
 352         }
 353
 354         return 0;
 355 }
 356
 357 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 358 {
 359         prt_printf(out, "%s: ", bch2_btree_id_str(c->gc_gens_btree));
 360         bch2_bpos_to_text(out, c->gc_gens_pos);
 361         prt_printf(out, "\n");
 362 }
 363
 364 static void bch2_btree_wakeup_all(struct bch_fs *c)
 365 {
 366         struct btree_trans *trans;
 367
 368         seqmutex_lock(&c->btree_trans_lock);
 369         list_for_each_entry(trans, &c->btree_trans_list, list) {
 370                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 371
 372                 if (b)
 373                         six_lock_wakeup_all(&b->lock);
 374
 375         }
 376         seqmutex_unlock(&c->btree_trans_lock);
 377 }
 378
 379 SHOW(bch2_fs)
 380 {
 381         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 382
 383         sysfs_print(minor,                      c->minor);
 384         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 385
 386         if (attr == &sysfs_flags)
 387                 prt_bitflags(out, bch2_fs_flag_strs, c->flags);
 388
 389         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 390
 391         if (attr == &sysfs_btree_write_stats)
 392                 bch2_btree_write_stats_to_text(out, c);
 393
 394         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 395
 396         if (attr == &sysfs_gc_gens_pos)
 397                 bch2_gc_gens_pos_to_text(out, c);
 398
 399         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 400
 401         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 402         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 403
 404         if (attr == &sysfs_copy_gc_wait)
 405                 bch2_copygc_wait_to_text(out, c);
 406
 407         if (attr == &sysfs_rebalance_status)
 408                 bch2_rebalance_status_to_text(out, c);
 409
 410         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 411
 412         /* Debugging: */
 413
 414         if (attr == &sysfs_journal_debug)
 415                 bch2_journal_debug_to_text(out, &c->journal);
 416
 417         if (attr == &sysfs_btree_updates)
 418                 bch2_btree_updates_to_text(out, c);
 419
 420         if (attr == &sysfs_btree_cache)
 421                 bch2_btree_cache_to_text(out, c);
 422
 423         if (attr == &sysfs_btree_key_cache)
 424                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 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_open_buckets_partial)
 433                 bch2_open_buckets_partial_to_text(out, c);
 434
 435         if (attr == &sysfs_write_points)
 436                 bch2_write_points_to_text(out, c);
 437
 438         if (attr == &sysfs_compression_stats)
 439                 bch2_compression_stats_to_text(out, c);
 440
 441         if (attr == &sysfs_new_stripes)
 442                 bch2_new_stripes_to_text(out, c);
 443
 444         if (attr == &sysfs_io_timers_read)
 445                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 446
 447         if (attr == &sysfs_io_timers_write)
 448                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 449
 450         if (attr == &sysfs_moving_ctxts)
 451                 bch2_fs_moving_ctxts_to_text(out, c);
 452
 453 #ifdef BCH_WRITE_REF_DEBUG
 454         if (attr == &sysfs_write_refs)
 455                 bch2_write_refs_to_text(out, c);
 456 #endif
 457
 458         if (attr == &sysfs_nocow_lock_table)
 459                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 460
 461         if (attr == &sysfs_disk_groups)
 462                 bch2_disk_groups_to_text(out, c);
 463
 464         return 0;
 465 }
 466
 467 STORE(bch2_fs)
 468 {
 469         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 470
 471         if (attr == &sysfs_btree_gc_periodic) {
 472                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 473                         ?: (ssize_t) size;
 474
 475                 wake_up_process(c->gc_thread);
 476                 return ret;
 477         }
 478
 479         if (attr == &sysfs_copy_gc_enabled) {
 480                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 481                         ?: (ssize_t) size;
 482
 483                 if (c->copygc_thread)
 484                         wake_up_process(c->copygc_thread);
 485                 return ret;
 486         }
 487
 488         if (attr == &sysfs_rebalance_enabled) {
 489                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 490                         ?: (ssize_t) size;
 491
 492                 rebalance_wakeup(c);
 493                 return ret;
 494         }
 495
 496         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 497
 498         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 499
 500         /* Debugging: */
 501
 502         if (!test_bit(BCH_FS_started, &c->flags))
 503                 return -EPERM;
 504
 505         /* Debugging: */
 506
 507         if (!test_bit(BCH_FS_rw, &c->flags))
 508                 return -EROFS;
 509
 510         if (attr == &sysfs_prune_cache) {
 511                 struct shrink_control sc;
 512
 513                 sc.gfp_mask = GFP_KERNEL;
 514                 sc.nr_to_scan = strtoul_or_return(buf);
 515                 c->btree_cache.shrink->scan_objects(c->btree_cache.shrink, &sc);
 516         }
 517
 518         if (attr == &sysfs_btree_wakeup)
 519                 bch2_btree_wakeup_all(c);
 520
 521         if (attr == &sysfs_trigger_gc) {
 522                 /*
 523                  * Full gc is currently incompatible with btree key cache:
 524                  */
 525 #if 0
 526                 down_read(&c->state_lock);
 527                 bch2_gc(c, false, false);
 528                 up_read(&c->state_lock);
 529 #else
 530                 bch2_gc_gens(c);
 531 #endif
 532         }
 533
 534         if (attr == &sysfs_trigger_discards)
 535                 bch2_do_discards(c);
 536
 537         if (attr == &sysfs_trigger_invalidates)
 538                 bch2_do_invalidates(c);
 539
 540 #ifdef CONFIG_BCACHEFS_TESTS
 541         if (attr == &sysfs_perf_test) {
 542                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 543                 char *test              = strsep(&p, " \t\n");
 544                 char *nr_str            = strsep(&p, " \t\n");
 545                 char *threads_str       = strsep(&p, " \t\n");
 546                 unsigned threads;
 547                 u64 nr;
 548                 int ret = -EINVAL;
 549
 550                 if (threads_str &&
 551                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 552                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 553                         ret = bch2_btree_perf_test(c, test, nr, threads);
 554                 kfree(tmp);
 555
 556                 if (ret)
 557                         size = ret;
 558         }
 559 #endif
 560         return size;
 561 }
 562 SYSFS_OPS(bch2_fs);
 563
 564 struct attribute *bch2_fs_files[] = {
 565         &sysfs_minor,
 566         &sysfs_btree_cache_size,
 567         &sysfs_btree_write_stats,
 568
 569         &sysfs_promote_whole_extents,
 570
 571         &sysfs_compression_stats,
 572
 573 #ifdef CONFIG_BCACHEFS_TESTS
 574         &sysfs_perf_test,
 575 #endif
 576         NULL
 577 };
 578
 579 /* counters dir */
 580
 581 SHOW(bch2_fs_counters)
 582 {
 583         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 584         u64 counter = 0;
 585         u64 counter_since_mount = 0;
 586
 587         printbuf_tabstop_push(out, 32);
 588
 589         #define x(t, ...) \
 590                 if (attr == &sysfs_##t) {                                       \
 591                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 592                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 593                         prt_printf(out, "since mount:");                                \
 594                         prt_tab(out);                                           \
 595                         prt_human_readable_u64(out, counter_since_mount);       \
 596                         prt_newline(out);                                       \
 597                                                                                 \
 598                         prt_printf(out, "since filesystem creation:");          \
 599                         prt_tab(out);                                           \
 600                         prt_human_readable_u64(out, counter);                   \
 601                         prt_newline(out);                                       \
 602                 }
 603         BCH_PERSISTENT_COUNTERS()
 604         #undef x
 605         return 0;
 606 }
 607
 608 STORE(bch2_fs_counters) {
 609         return 0;
 610 }
 611
 612 SYSFS_OPS(bch2_fs_counters);
 613
 614 struct attribute *bch2_fs_counters_files[] = {
 615 #define x(t, ...) \
 616         &sysfs_##t,
 617         BCH_PERSISTENT_COUNTERS()
 618 #undef x
 619         NULL
 620 };
 621 /* internal dir - just a wrapper */
 622
 623 SHOW(bch2_fs_internal)
 624 {
 625         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 626
 627         return bch2_fs_to_text(out, &c->kobj, attr);
 628 }
 629
 630 STORE(bch2_fs_internal)
 631 {
 632         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 633
 634         return bch2_fs_store(&c->kobj, attr, buf, size);
 635 }
 636 SYSFS_OPS(bch2_fs_internal);
 637
 638 struct attribute *bch2_fs_internal_files[] = {
 639         &sysfs_flags,
 640         &sysfs_journal_debug,
 641         &sysfs_btree_updates,
 642         &sysfs_btree_cache,
 643         &sysfs_btree_key_cache,
 644         &sysfs_new_stripes,
 645         &sysfs_stripes_heap,
 646         &sysfs_open_buckets,
 647         &sysfs_open_buckets_partial,
 648         &sysfs_write_points,
 649 #ifdef BCH_WRITE_REF_DEBUG
 650         &sysfs_write_refs,
 651 #endif
 652         &sysfs_nocow_lock_table,
 653         &sysfs_io_timers_read,
 654         &sysfs_io_timers_write,
 655
 656         &sysfs_trigger_gc,
 657         &sysfs_trigger_discards,
 658         &sysfs_trigger_invalidates,
 659         &sysfs_prune_cache,
 660         &sysfs_btree_wakeup,
 661
 662         &sysfs_gc_gens_pos,
 663
 664         &sysfs_copy_gc_enabled,
 665         &sysfs_copy_gc_wait,
 666
 667         &sysfs_rebalance_enabled,
 668         &sysfs_rebalance_status,
 669         sysfs_pd_controller_files(rebalance),
 670
 671         &sysfs_moving_ctxts,
 672
 673         &sysfs_internal_uuid,
 674
 675         &sysfs_disk_groups,
 676         NULL
 677 };
 678
 679 /* options */
 680
 681 SHOW(bch2_fs_opts_dir)
 682 {
 683         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 684         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 685         int id = opt - bch2_opt_table;
 686         u64 v = bch2_opt_get_by_id(&c->opts, id);
 687
 688         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 689         prt_char(out, '\n');
 690
 691         return 0;
 692 }
 693
 694 STORE(bch2_fs_opts_dir)
 695 {
 696         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 697         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 698         int ret, id = opt - bch2_opt_table;
 699         char *tmp;
 700         u64 v;
 701
 702         /*
 703          * We don't need to take c->writes for correctness, but it eliminates an
 704          * unsightly error message in the dmesg log when we're RO:
 705          */
 706         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 707                 return -EROFS;
 708
 709         tmp = kstrdup(buf, GFP_KERNEL);
 710         if (!tmp) {
 711                 ret = -ENOMEM;
 712                 goto err;
 713         }
 714
 715         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 716         kfree(tmp);
 717
 718         if (ret < 0)
 719                 goto err;
 720
 721         ret = bch2_opt_check_may_set(c, id, v);
 722         if (ret < 0)
 723                 goto err;
 724
 725         bch2_opt_set_sb(c, opt, v);
 726         bch2_opt_set_by_id(&c->opts, id, v);
 727
 728         if ((id == Opt_background_target ||
 729              id == Opt_background_compression) && v)
 730                 bch2_set_rebalance_needs_scan(c, 0);
 731
 732         ret = size;
 733 err:
 734         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 735         return ret;
 736 }
 737 SYSFS_OPS(bch2_fs_opts_dir);
 738
 739 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 740
 741 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 742 {
 743         const struct bch_option *i;
 744         int ret;
 745
 746         for (i = bch2_opt_table;
 747              i < bch2_opt_table + bch2_opts_nr;
 748              i++) {
 749                 if (!(i->flags & OPT_FS))
 750                         continue;
 751
 752                 ret = sysfs_create_file(kobj, &i->attr);
 753                 if (ret)
 754                         return ret;
 755         }
 756
 757         return 0;
 758 }
 759
 760 /* time stats */
 761
 762 SHOW(bch2_fs_time_stats)
 763 {
 764         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 765
 766 #define x(name)                                                         \
 767         if (attr == &sysfs_time_stat_##name)                            \
 768                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 769         BCH_TIME_STATS()
 770 #undef x
 771
 772         return 0;
 773 }
 774
 775 STORE(bch2_fs_time_stats)
 776 {
 777         return size;
 778 }
 779 SYSFS_OPS(bch2_fs_time_stats);
 780
 781 struct attribute *bch2_fs_time_stats_files[] = {
 782 #define x(name)                                         \
 783         &sysfs_time_stat_##name,
 784         BCH_TIME_STATS()
 785 #undef x
 786         NULL
 787 };
 788
 789 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 790 {
 791         struct bch_fs *c = ca->fs;
 792         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 793         unsigned i, nr[BCH_DATA_NR];
 794
 795         memset(nr, 0, sizeof(nr));
 796
 797         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 798                 nr[c->open_buckets[i].data_type]++;
 799
 800         printbuf_tabstop_push(out, 8);
 801         printbuf_tabstop_push(out, 16);
 802         printbuf_tabstop_push(out, 16);
 803         printbuf_tabstop_push(out, 16);
 804         printbuf_tabstop_push(out, 16);
 805
 806         bch2_dev_usage_to_text(out, &stats);
 807
 808         prt_newline(out);
 809
 810         prt_printf(out, "reserves:");
 811         prt_newline(out);
 812         for (i = 0; i < BCH_WATERMARK_NR; i++) {
 813                 prt_str(out, bch2_watermarks[i]);
 814                 prt_tab(out);
 815                 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
 816                 prt_tab_rjust(out);
 817                 prt_newline(out);
 818         }
 819
 820         prt_newline(out);
 821
 822         printbuf_tabstops_reset(out);
 823         printbuf_tabstop_push(out, 24);
 824
 825         prt_str(out, "freelist_wait");
 826         prt_tab(out);
 827         prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
 828         prt_newline(out);
 829
 830         prt_str(out, "open buckets allocated");
 831         prt_tab(out);
 832         prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
 833         prt_newline(out);
 834
 835         prt_str(out, "open buckets this dev");
 836         prt_tab(out);
 837         prt_u64(out, ca->nr_open_buckets);
 838         prt_newline(out);
 839
 840         prt_str(out, "open buckets total");
 841         prt_tab(out);
 842         prt_u64(out, OPEN_BUCKETS_COUNT);
 843         prt_newline(out);
 844
 845         prt_str(out, "open_buckets_wait");
 846         prt_tab(out);
 847         prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
 848         prt_newline(out);
 849
 850         prt_str(out, "open_buckets_btree");
 851         prt_tab(out);
 852         prt_u64(out, nr[BCH_DATA_btree]);
 853         prt_newline(out);
 854
 855         prt_str(out, "open_buckets_user");
 856         prt_tab(out);
 857         prt_u64(out, nr[BCH_DATA_user]);
 858         prt_newline(out);
 859
 860         prt_str(out, "buckets_to_invalidate");
 861         prt_tab(out);
 862         prt_u64(out, should_invalidate_buckets(ca, stats));
 863         prt_newline(out);
 864
 865         prt_str(out, "btree reserve cache");
 866         prt_tab(out);
 867         prt_u64(out, c->btree_reserve_cache_nr);
 868         prt_newline(out);
 869 }
 870
 871 static const char * const bch2_rw[] = {
 872         "read",
 873         "write",
 874         NULL
 875 };
 876
 877 static void dev_io_done_to_text(struct printbuf *out, struct bch_dev *ca)
 878 {
 879         int rw, i;
 880
 881         for (rw = 0; rw < 2; rw++) {
 882                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 883
 884                 for (i = 1; i < BCH_DATA_NR; i++)
 885                         prt_printf(out, "%-12s:%12llu\n",
 886                                bch2_data_types[i],
 887                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 888         }
 889 }
 890
 891 SHOW(bch2_dev)
 892 {
 893         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 894         struct bch_fs *c = ca->fs;
 895
 896         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 897
 898         sysfs_print(bucket_size,        bucket_bytes(ca));
 899         sysfs_print(first_bucket,       ca->mi.first_bucket);
 900         sysfs_print(nbuckets,           ca->mi.nbuckets);
 901         sysfs_print(durability,         ca->mi.durability);
 902         sysfs_print(discard,            ca->mi.discard);
 903
 904         if (attr == &sysfs_label) {
 905                 if (ca->mi.group)
 906                         bch2_disk_path_to_text(out, c, ca->mi.group - 1);
 907                 prt_char(out, '\n');
 908         }
 909
 910         if (attr == &sysfs_has_data) {
 911                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 912                 prt_char(out, '\n');
 913         }
 914
 915         if (attr == &sysfs_state_rw) {
 916                 prt_string_option(out, bch2_member_states, ca->mi.state);
 917                 prt_char(out, '\n');
 918         }
 919
 920         if (attr == &sysfs_io_done)
 921                 dev_io_done_to_text(out, ca);
 922
 923         if (attr == &sysfs_io_errors)
 924                 bch2_dev_io_errors_to_text(out, ca);
 925
 926         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 927         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 928
 929         if (attr == &sysfs_io_latency_stats_read)
 930                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 931
 932         if (attr == &sysfs_io_latency_stats_write)
 933                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 934
 935         sysfs_printf(congested,                 "%u%%",
 936                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 937                      * 100 / CONGESTED_MAX);
 938
 939         if (attr == &sysfs_alloc_debug)
 940                 dev_alloc_debug_to_text(out, ca);
 941
 942         return 0;
 943 }
 944
 945 STORE(bch2_dev)
 946 {
 947         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 948         struct bch_fs *c = ca->fs;
 949         struct bch_member *mi;
 950
 951         if (attr == &sysfs_discard) {
 952                 bool v = strtoul_or_return(buf);
 953
 954                 mutex_lock(&c->sb_lock);
 955                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 956
 957                 if (v != BCH_MEMBER_DISCARD(mi)) {
 958                         SET_BCH_MEMBER_DISCARD(mi, v);
 959                         bch2_write_super(c);
 960                 }
 961                 mutex_unlock(&c->sb_lock);
 962         }
 963
 964         if (attr == &sysfs_durability) {
 965                 u64 v = strtoul_or_return(buf);
 966
 967                 mutex_lock(&c->sb_lock);
 968                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 969
 970                 if (v + 1 != BCH_MEMBER_DURABILITY(mi)) {
 971                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 972                         bch2_write_super(c);
 973                 }
 974                 mutex_unlock(&c->sb_lock);
 975         }
 976
 977         if (attr == &sysfs_label) {
 978                 char *tmp;
 979                 int ret;
 980
 981                 tmp = kstrdup(buf, GFP_KERNEL);
 982                 if (!tmp)
 983                         return -ENOMEM;
 984
 985                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 986                 kfree(tmp);
 987                 if (ret)
 988                         return ret;
 989         }
 990
 991         if (attr == &sysfs_io_errors_reset)
 992                 bch2_dev_errors_reset(ca);
 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_io_done,
1012         &sysfs_io_errors,
1013         &sysfs_io_errors_reset,
1014
1015         &sysfs_io_latency_read,
1016         &sysfs_io_latency_write,
1017         &sysfs_io_latency_stats_read,
1018         &sysfs_io_latency_stats_write,
1019         &sysfs_congested,
1020
1021         /* debug: */
1022         &sysfs_alloc_debug,
1023         NULL
1024 };
1025
1026 #endif  /* _BCACHEFS_SYSFS_H_ */