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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * bcache sysfs interfaces
   4  *
   5  * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com>
   6  * Copyright 2012 Google, Inc.
   7  */
   8
   9 #ifndef NO_BCACHEFS_SYSFS
  10
  11 #include "bcachefs.h"
  12 #include "alloc_background.h"
  13 #include "alloc_foreground.h"
  14 #include "sysfs.h"
  15 #include "btree_cache.h"
  16 #include "btree_io.h"
  17 #include "btree_iter.h"
  18 #include "btree_key_cache.h"
  19 #include "btree_update.h"
  20 #include "btree_update_interior.h"
  21 #include "btree_gc.h"
  22 #include "buckets.h"
  23 #include "clock.h"
  24 #include "disk_groups.h"
  25 #include "ec.h"
  26 #include "inode.h"
  27 #include "journal.h"
  28 #include "keylist.h"
  29 #include "move.h"
  30 #include "opts.h"
  31 #include "rebalance.h"
  32 #include "replicas.h"
  33 #include "super-io.h"
  34 #include "tests.h"
  35
  36 #include <linux/blkdev.h>
  37 #include <linux/pretty-printers.h>
  38 #include <linux/sort.h>
  39 #include <linux/sched/clock.h>
  40
  41 #include "util.h"
  42
  43 #define SYSFS_OPS(type)                                                 \
  44 const struct sysfs_ops type ## _sysfs_ops = {                           \
  45         .show   = type ## _show,                                        \
  46         .store  = type ## _store                                        \
  47 }
  48
  49 #define SHOW(fn)                                                        \
  50 static ssize_t fn ## _to_text(struct printbuf *,                        \
  51                               struct kobject *, struct attribute *);    \
  52                                                                         \
  53 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  54                            char *buf)                                   \
  55 {                                                                       \
  56         struct printbuf out = PRINTBUF;                                 \
  57         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  58                                                                         \
  59         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  60                 prt_newline(&out);                                      \
  61                                                                         \
  62         if (!ret && out.allocation_failure)                             \
  63                 ret = -ENOMEM;                                          \
  64                                                                         \
  65         if (!ret) {                                                     \
  66                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  67                 memcpy(buf, out.buf, ret);                              \
  68         }                                                               \
  69         printbuf_exit(&out);                                            \
  70         return bch2_err_class(ret);                                     \
  71 }                                                                       \
  72                                                                         \
  73 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  74                               struct attribute *attr)
  75
  76 #define STORE(fn)                                                       \
  77 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
  78                             const char *, size_t);                      \
  79                                                                         \
  80 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  81                             const char *buf, size_t size)               \
  82 {                                                                       \
  83         return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
  84 }                                                                       \
  85                                                                         \
  86 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
  87                                   const char *buf, size_t size)
  88
  89 #define __sysfs_attribute(_name, _mode)                                 \
  90         static struct attribute sysfs_##_name =                         \
  91                 { .name = #_name, .mode = _mode }
  92
  93 #define write_attribute(n)      __sysfs_attribute(n, 0200)
  94 #define read_attribute(n)       __sysfs_attribute(n, 0444)
  95 #define rw_attribute(n)         __sysfs_attribute(n, 0644)
  96
  97 #define sysfs_printf(file, fmt, ...)                                    \
  98 do {                                                                    \
  99         if (attr == &sysfs_ ## file)                                    \
 100                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
 101 } while (0)
 102
 103 #define sysfs_print(file, var)                                          \
 104 do {                                                                    \
 105         if (attr == &sysfs_ ## file)                                    \
 106                 snprint(out, var);                                      \
 107 } while (0)
 108
 109 #define sysfs_hprint(file, val)                                         \
 110 do {                                                                    \
 111         if (attr == &sysfs_ ## file)                                    \
 112                 prt_human_readable_s64(out, val);                       \
 113 } while (0)
 114
 115 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 116 #define var_print(_var)         sysfs_print(_var, var(_var))
 117 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 118
 119 #define sysfs_strtoul(file, var)                                        \
 120 do {                                                                    \
 121         if (attr == &sysfs_ ## file)                                    \
 122                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 123 } while (0)
 124
 125 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 126 do {                                                                    \
 127         if (attr == &sysfs_ ## file)                                    \
 128                 return strtoul_safe_clamp(buf, var, min, max)           \
 129                         ?: (ssize_t) size;                              \
 130 } while (0)
 131
 132 #define strtoul_or_return(cp)                                           \
 133 ({                                                                      \
 134         unsigned long _v;                                               \
 135         int _r = kstrtoul(cp, 10, &_v);                                 \
 136         if (_r)                                                         \
 137                 return _r;                                              \
 138         _v;                                                             \
 139 })
 140
 141 #define strtoul_restrict_or_return(cp, min, max)                        \
 142 ({                                                                      \
 143         unsigned long __v = 0;                                          \
 144         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 145         if (_r)                                                         \
 146                 return _r;                                              \
 147         __v;                                                            \
 148 })
 149
 150 #define strtoi_h_or_return(cp)                                          \
 151 ({                                                                      \
 152         u64 _v;                                                         \
 153         int _r = strtoi_h(cp, &_v);                                     \
 154         if (_r)                                                         \
 155                 return _r;                                              \
 156         _v;                                                             \
 157 })
 158
 159 #define sysfs_hatoi(file, var)                                          \
 160 do {                                                                    \
 161         if (attr == &sysfs_ ## file)                                    \
 162                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 163 } while (0)
 164
 165 write_attribute(trigger_gc);
 166 write_attribute(trigger_discards);
 167 write_attribute(trigger_invalidates);
 168 write_attribute(prune_cache);
 169 write_attribute(btree_wakeup);
 170 rw_attribute(btree_gc_periodic);
 171 rw_attribute(gc_gens_pos);
 172
 173 read_attribute(uuid);
 174 read_attribute(minor);
 175 read_attribute(bucket_size);
 176 read_attribute(first_bucket);
 177 read_attribute(nbuckets);
 178 rw_attribute(durability);
 179 read_attribute(iodone);
 180
 181 read_attribute(io_latency_read);
 182 read_attribute(io_latency_write);
 183 read_attribute(io_latency_stats_read);
 184 read_attribute(io_latency_stats_write);
 185 read_attribute(congested);
 186
 187 read_attribute(btree_write_stats);
 188
 189 read_attribute(btree_cache_size);
 190 read_attribute(compression_stats);
 191 read_attribute(journal_debug);
 192 read_attribute(btree_updates);
 193 read_attribute(btree_cache);
 194 read_attribute(btree_key_cache);
 195 read_attribute(stripes_heap);
 196 read_attribute(open_buckets);
 197 read_attribute(nocow_lock_table);
 198
 199 read_attribute(internal_uuid);
 200
 201 read_attribute(has_data);
 202 read_attribute(alloc_debug);
 203
 204 #define x(t, n, ...) read_attribute(t);
 205 BCH_PERSISTENT_COUNTERS()
 206 #undef x
 207
 208 rw_attribute(discard);
 209 rw_attribute(label);
 210
 211 rw_attribute(copy_gc_enabled);
 212 read_attribute(copy_gc_wait);
 213
 214 rw_attribute(rebalance_enabled);
 215 sysfs_pd_controller_attribute(rebalance);
 216 read_attribute(rebalance_work);
 217 rw_attribute(promote_whole_extents);
 218
 219 read_attribute(new_stripes);
 220
 221 read_attribute(io_timers_read);
 222 read_attribute(io_timers_write);
 223
 224 read_attribute(data_jobs);
 225
 226 #ifdef CONFIG_BCACHEFS_TESTS
 227 write_attribute(perf_test);
 228 #endif /* CONFIG_BCACHEFS_TESTS */
 229
 230 #define x(_name)                                                \
 231         static struct attribute sysfs_time_stat_##_name =               \
 232                 { .name = #_name, .mode = 0444 };
 233         BCH_TIME_STATS()
 234 #undef x
 235
 236 static struct attribute sysfs_state_rw = {
 237         .name = "state",
 238         .mode =  0444,
 239 };
 240
 241 static size_t bch2_btree_cache_size(struct bch_fs *c)
 242 {
 243         size_t ret = 0;
 244         struct btree *b;
 245
 246         mutex_lock(&c->btree_cache.lock);
 247         list_for_each_entry(b, &c->btree_cache.live, list)
 248                 ret += btree_bytes(c);
 249
 250         mutex_unlock(&c->btree_cache.lock);
 251         return ret;
 252 }
 253
 254 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 255 {
 256         long ret = 0;
 257         struct bch_move_stats *stats;
 258
 259         mutex_lock(&c->data_progress_lock);
 260         list_for_each_entry(stats, &c->data_progress_list, list) {
 261                 prt_printf(out, "%s: data type %s btree_id %s position: ",
 262                        stats->name,
 263                        bch2_data_types[stats->data_type],
 264                        bch2_btree_ids[stats->btree_id]);
 265                 bch2_bpos_to_text(out, stats->pos);
 266                 prt_printf(out, "%s", "\n");
 267         }
 268
 269         mutex_unlock(&c->data_progress_lock);
 270         return ret;
 271 }
 272
 273 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 274 {
 275         struct btree_trans trans;
 276         struct btree_iter iter;
 277         struct bkey_s_c k;
 278         enum btree_id id;
 279         u64 nr_uncompressed_extents = 0,
 280             nr_compressed_extents = 0,
 281             nr_incompressible_extents = 0,
 282             uncompressed_sectors = 0,
 283             incompressible_sectors = 0,
 284             compressed_sectors_compressed = 0,
 285             compressed_sectors_uncompressed = 0;
 286         int ret;
 287
 288         if (!test_bit(BCH_FS_STARTED, &c->flags))
 289                 return -EPERM;
 290
 291         bch2_trans_init(&trans, c, 0, 0);
 292
 293         for (id = 0; id < BTREE_ID_NR; id++) {
 294                 if (!btree_type_has_ptrs(id))
 295                         continue;
 296
 297                 for_each_btree_key(&trans, iter, id, POS_MIN,
 298                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 299                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 300                         const union bch_extent_entry *entry;
 301                         struct extent_ptr_decoded p;
 302                         bool compressed = false, uncompressed = false, incompressible = false;
 303
 304                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 305                                 switch (p.crc.compression_type) {
 306                                 case BCH_COMPRESSION_TYPE_none:
 307                                         uncompressed = true;
 308                                         uncompressed_sectors += k.k->size;
 309                                         break;
 310                                 case BCH_COMPRESSION_TYPE_incompressible:
 311                                         incompressible = true;
 312                                         incompressible_sectors += k.k->size;
 313                                         break;
 314                                 default:
 315                                         compressed_sectors_compressed +=
 316                                                 p.crc.compressed_size;
 317                                         compressed_sectors_uncompressed +=
 318                                                 p.crc.uncompressed_size;
 319                                         compressed = true;
 320                                         break;
 321                                 }
 322                         }
 323
 324                         if (incompressible)
 325                                 nr_incompressible_extents++;
 326                         else if (uncompressed)
 327                                 nr_uncompressed_extents++;
 328                         else if (compressed)
 329                                 nr_compressed_extents++;
 330                 }
 331                 bch2_trans_iter_exit(&trans, &iter);
 332         }
 333
 334         bch2_trans_exit(&trans);
 335
 336         if (ret)
 337                 return ret;
 338
 339         prt_printf(out, "uncompressed:\n");
 340         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 341         prt_printf(out, "       size:                   ");
 342         prt_human_readable_u64(out, uncompressed_sectors << 9);
 343         prt_printf(out, "\n");
 344
 345         prt_printf(out, "compressed:\n");
 346         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 347         prt_printf(out, "       compressed size:        ");
 348         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 349         prt_printf(out, "\n");
 350         prt_printf(out, "       uncompressed size:      ");
 351         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 352         prt_printf(out, "\n");
 353
 354         prt_printf(out, "incompressible:\n");
 355         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 356         prt_printf(out, "       size:                   ");
 357         prt_human_readable_u64(out, incompressible_sectors << 9);
 358         prt_printf(out, "\n");
 359         return 0;
 360 }
 361
 362 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 363 {
 364         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 365         bch2_bpos_to_text(out, c->gc_gens_pos);
 366         prt_printf(out, "\n");
 367 }
 368
 369 static void bch2_btree_wakeup_all(struct bch_fs *c)
 370 {
 371         struct btree_trans *trans;
 372
 373         mutex_lock(&c->btree_trans_lock);
 374         list_for_each_entry(trans, &c->btree_trans_list, list) {
 375                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 376
 377                 if (b)
 378                         six_lock_wakeup_all(&b->lock);
 379
 380         }
 381         mutex_unlock(&c->btree_trans_lock);
 382 }
 383
 384 SHOW(bch2_fs)
 385 {
 386         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 387
 388         sysfs_print(minor,                      c->minor);
 389         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 390
 391         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 392
 393         if (attr == &sysfs_btree_write_stats)
 394                 bch2_btree_write_stats_to_text(out, c);
 395
 396         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 397
 398         if (attr == &sysfs_gc_gens_pos)
 399                 bch2_gc_gens_pos_to_text(out, c);
 400
 401         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 402
 403         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 404         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 405         sysfs_hprint(copy_gc_wait,
 406                      max(0LL, c->copygc_wait -
 407                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 408
 409         if (attr == &sysfs_rebalance_work)
 410                 bch2_rebalance_work_to_text(out, c);
 411
 412         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 413
 414         /* Debugging: */
 415
 416         if (attr == &sysfs_journal_debug)
 417                 bch2_journal_debug_to_text(out, &c->journal);
 418
 419         if (attr == &sysfs_btree_updates)
 420                 bch2_btree_updates_to_text(out, c);
 421
 422         if (attr == &sysfs_btree_cache)
 423                 bch2_btree_cache_to_text(out, &c->btree_cache);
 424
 425         if (attr == &sysfs_btree_key_cache)
 426                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 427
 428         if (attr == &sysfs_stripes_heap)
 429                 bch2_stripes_heap_to_text(out, c);
 430
 431         if (attr == &sysfs_open_buckets)
 432                 bch2_open_buckets_to_text(out, c);
 433
 434         if (attr == &sysfs_compression_stats)
 435                 bch2_compression_stats_to_text(out, c);
 436
 437         if (attr == &sysfs_new_stripes)
 438                 bch2_new_stripes_to_text(out, c);
 439
 440         if (attr == &sysfs_io_timers_read)
 441                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 442
 443         if (attr == &sysfs_io_timers_write)
 444                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 445
 446         if (attr == &sysfs_data_jobs)
 447                 data_progress_to_text(out, c);
 448
 449         if (attr == &sysfs_nocow_lock_table) {
 450                 int i, count = 1;
 451                 long last, curr = 0;
 452
 453                 last = atomic_long_read(&c->nocow_locks.l[0].v);
 454                 for (i = 1; i < BUCKET_NOCOW_LOCKS; i++) {
 455                         curr = atomic_long_read(&c->nocow_locks.l[i].v);
 456                         if (last != curr) {
 457                                 prt_printf(out, "%li: %d\n", last, count);
 458                                 count = 1;
 459                                 last = curr;
 460                         } else
 461                                 count++;
 462                 }
 463                 prt_printf(out, "%li: %d\n", last, count);
 464 }
 465         return 0;
 466 }
 467
 468 STORE(bch2_fs)
 469 {
 470         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 471
 472         if (attr == &sysfs_btree_gc_periodic) {
 473                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 474                         ?: (ssize_t) size;
 475
 476                 wake_up_process(c->gc_thread);
 477                 return ret;
 478         }
 479
 480         if (attr == &sysfs_copy_gc_enabled) {
 481                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 482                         ?: (ssize_t) size;
 483
 484                 if (c->copygc_thread)
 485                         wake_up_process(c->copygc_thread);
 486                 return ret;
 487         }
 488
 489         if (attr == &sysfs_rebalance_enabled) {
 490                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 491                         ?: (ssize_t) size;
 492
 493                 rebalance_wakeup(c);
 494                 return ret;
 495         }
 496
 497         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 498
 499         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 500
 501         /* Debugging: */
 502
 503         if (!test_bit(BCH_FS_STARTED, &c->flags))
 504                 return -EPERM;
 505
 506         /* Debugging: */
 507
 508         if (!test_bit(BCH_FS_RW, &c->flags))
 509                 return -EROFS;
 510
 511         if (attr == &sysfs_prune_cache) {
 512                 struct shrink_control sc;
 513
 514                 sc.gfp_mask = GFP_KERNEL;
 515                 sc.nr_to_scan = strtoul_or_return(buf);
 516                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 517         }
 518
 519         if (attr == &sysfs_btree_wakeup)
 520                 bch2_btree_wakeup_all(c);
 521
 522         if (attr == &sysfs_trigger_gc) {
 523                 /*
 524                  * Full gc is currently incompatible with btree key cache:
 525                  */
 526 #if 0
 527                 down_read(&c->state_lock);
 528                 bch2_gc(c, false, false);
 529                 up_read(&c->state_lock);
 530 #else
 531                 bch2_gc_gens(c);
 532 #endif
 533         }
 534
 535         if (attr == &sysfs_trigger_discards)
 536                 bch2_do_discards(c);
 537
 538         if (attr == &sysfs_trigger_invalidates)
 539                 bch2_do_invalidates(c);
 540
 541 #ifdef CONFIG_BCACHEFS_TESTS
 542         if (attr == &sysfs_perf_test) {
 543                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 544                 char *test              = strsep(&p, " \t\n");
 545                 char *nr_str            = strsep(&p, " \t\n");
 546                 char *threads_str       = strsep(&p, " \t\n");
 547                 unsigned threads;
 548                 u64 nr;
 549                 int ret = -EINVAL;
 550
 551                 if (threads_str &&
 552                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 553                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 554                         ret = bch2_btree_perf_test(c, test, nr, threads);
 555                 kfree(tmp);
 556
 557                 if (ret)
 558                         size = ret;
 559         }
 560 #endif
 561         return size;
 562 }
 563 SYSFS_OPS(bch2_fs);
 564
 565 struct attribute *bch2_fs_files[] = {
 566         &sysfs_minor,
 567         &sysfs_btree_cache_size,
 568         &sysfs_btree_write_stats,
 569
 570         &sysfs_promote_whole_extents,
 571
 572         &sysfs_compression_stats,
 573
 574 #ifdef CONFIG_BCACHEFS_TESTS
 575         &sysfs_perf_test,
 576 #endif
 577         NULL
 578 };
 579
 580 /* counters dir */
 581
 582 SHOW(bch2_fs_counters)
 583 {
 584         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 585         u64 counter = 0;
 586         u64 counter_since_mount = 0;
 587
 588         printbuf_tabstop_push(out, 32);
 589
 590         #define x(t, ...) \
 591                 if (attr == &sysfs_##t) {                                       \
 592                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 593                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 594                         prt_printf(out, "since mount:");                                \
 595                         prt_tab(out);                                           \
 596                         prt_human_readable_u64(out, counter_since_mount << 9);  \
 597                         prt_newline(out);                                       \
 598                                                                                 \
 599                         prt_printf(out, "since filesystem creation:");          \
 600                         prt_tab(out);                                           \
 601                         prt_human_readable_u64(out, counter << 9);              \
 602                         prt_newline(out);                                       \
 603                 }
 604         BCH_PERSISTENT_COUNTERS()
 605         #undef x
 606         return 0;
 607 }
 608
 609 STORE(bch2_fs_counters) {
 610         return 0;
 611 }
 612
 613 SYSFS_OPS(bch2_fs_counters);
 614
 615 struct attribute *bch2_fs_counters_files[] = {
 616 #define x(t, ...) \
 617         &sysfs_##t,
 618         BCH_PERSISTENT_COUNTERS()
 619 #undef x
 620         NULL
 621 };
 622 /* internal dir - just a wrapper */
 623
 624 SHOW(bch2_fs_internal)
 625 {
 626         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 627
 628         return bch2_fs_to_text(out, &c->kobj, attr);
 629 }
 630
 631 STORE(bch2_fs_internal)
 632 {
 633         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 634
 635         return bch2_fs_store(&c->kobj, attr, buf, size);
 636 }
 637 SYSFS_OPS(bch2_fs_internal);
 638
 639 struct attribute *bch2_fs_internal_files[] = {
 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_nocow_lock_table,
 648         &sysfs_io_timers_read,
 649         &sysfs_io_timers_write,
 650
 651         &sysfs_trigger_gc,
 652         &sysfs_trigger_discards,
 653         &sysfs_trigger_invalidates,
 654         &sysfs_prune_cache,
 655         &sysfs_btree_wakeup,
 656
 657         &sysfs_gc_gens_pos,
 658
 659         &sysfs_copy_gc_enabled,
 660         &sysfs_copy_gc_wait,
 661
 662         &sysfs_rebalance_enabled,
 663         &sysfs_rebalance_work,
 664         sysfs_pd_controller_files(rebalance),
 665
 666         &sysfs_data_jobs,
 667
 668         &sysfs_internal_uuid,
 669         NULL
 670 };
 671
 672 /* options */
 673
 674 SHOW(bch2_fs_opts_dir)
 675 {
 676         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 677         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 678         int id = opt - bch2_opt_table;
 679         u64 v = bch2_opt_get_by_id(&c->opts, id);
 680
 681         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 682         prt_char(out, '\n');
 683
 684         return 0;
 685 }
 686
 687 STORE(bch2_fs_opts_dir)
 688 {
 689         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 690         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 691         int ret, id = opt - bch2_opt_table;
 692         char *tmp;
 693         u64 v;
 694
 695         /*
 696          * We don't need to take c->writes for correctness, but it eliminates an
 697          * unsightly error message in the dmesg log when we're RO:
 698          */
 699         if (unlikely(!percpu_ref_tryget_live(&c->writes)))
 700                 return -EROFS;
 701
 702         tmp = kstrdup(buf, GFP_KERNEL);
 703         if (!tmp) {
 704                 ret = -ENOMEM;
 705                 goto err;
 706         }
 707
 708         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 709         kfree(tmp);
 710
 711         if (ret < 0)
 712                 goto err;
 713
 714         ret = bch2_opt_check_may_set(c, id, v);
 715         if (ret < 0)
 716                 goto err;
 717
 718         bch2_opt_set_sb(c, opt, v);
 719         bch2_opt_set_by_id(&c->opts, id, v);
 720
 721         if ((id == Opt_background_target ||
 722              id == Opt_background_compression) && v) {
 723                 bch2_rebalance_add_work(c, S64_MAX);
 724                 rebalance_wakeup(c);
 725         }
 726
 727         ret = size;
 728 err:
 729         percpu_ref_put(&c->writes);
 730         return ret;
 731 }
 732 SYSFS_OPS(bch2_fs_opts_dir);
 733
 734 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 735
 736 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 737 {
 738         const struct bch_option *i;
 739         int ret;
 740
 741         for (i = bch2_opt_table;
 742              i < bch2_opt_table + bch2_opts_nr;
 743              i++) {
 744                 if (!(i->flags & OPT_FS))
 745                         continue;
 746
 747                 ret = sysfs_create_file(kobj, &i->attr);
 748                 if (ret)
 749                         return ret;
 750         }
 751
 752         return 0;
 753 }
 754
 755 /* time stats */
 756
 757 SHOW(bch2_fs_time_stats)
 758 {
 759         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 760
 761 #define x(name)                                                         \
 762         if (attr == &sysfs_time_stat_##name)                            \
 763                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 764         BCH_TIME_STATS()
 765 #undef x
 766
 767         return 0;
 768 }
 769
 770 STORE(bch2_fs_time_stats)
 771 {
 772         return size;
 773 }
 774 SYSFS_OPS(bch2_fs_time_stats);
 775
 776 struct attribute *bch2_fs_time_stats_files[] = {
 777 #define x(name)                                         \
 778         &sysfs_time_stat_##name,
 779         BCH_TIME_STATS()
 780 #undef x
 781         NULL
 782 };
 783
 784 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 785 {
 786         struct bch_fs *c = ca->fs;
 787         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 788         unsigned i, nr[BCH_DATA_NR];
 789
 790         memset(nr, 0, sizeof(nr));
 791
 792         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 793                 nr[c->open_buckets[i].data_type]++;
 794
 795         prt_printf(out,
 796                "\t\t\t buckets\t sectors      fragmented\n"
 797                "capacity\t%16llu\n",
 798                ca->mi.nbuckets - ca->mi.first_bucket);
 799
 800         for (i = 0; i < BCH_DATA_NR; i++)
 801                 prt_printf(out, "%-16s%16llu%16llu%16llu\n",
 802                        bch2_data_types[i], stats.d[i].buckets,
 803                        stats.d[i].sectors, stats.d[i].fragmented);
 804
 805         prt_printf(out,
 806                "ec\t\t%16llu\n"
 807                "\n"
 808                "freelist_wait\t\t%s\n"
 809                "open buckets allocated\t%u\n"
 810                "open buckets this dev\t%u\n"
 811                "open buckets total\t%u\n"
 812                "open_buckets_wait\t%s\n"
 813                "open_buckets_btree\t%u\n"
 814                "open_buckets_user\t%u\n"
 815                "buckets_to_invalidate\t%llu\n"
 816                "btree reserve cache\t%u\n",
 817                stats.buckets_ec,
 818                c->freelist_wait.list.first              ? "waiting" : "empty",
 819                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 820                ca->nr_open_buckets,
 821                OPEN_BUCKETS_COUNT,
 822                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 823                nr[BCH_DATA_btree],
 824                nr[BCH_DATA_user],
 825                should_invalidate_buckets(ca, stats),
 826                c->btree_reserve_cache_nr);
 827 }
 828
 829 static const char * const bch2_rw[] = {
 830         "read",
 831         "write",
 832         NULL
 833 };
 834
 835 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 836 {
 837         int rw, i;
 838
 839         for (rw = 0; rw < 2; rw++) {
 840                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 841
 842                 for (i = 1; i < BCH_DATA_NR; i++)
 843                         prt_printf(out, "%-12s:%12llu\n",
 844                                bch2_data_types[i],
 845                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 846         }
 847 }
 848
 849 SHOW(bch2_dev)
 850 {
 851         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 852         struct bch_fs *c = ca->fs;
 853
 854         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 855
 856         sysfs_print(bucket_size,        bucket_bytes(ca));
 857         sysfs_print(first_bucket,       ca->mi.first_bucket);
 858         sysfs_print(nbuckets,           ca->mi.nbuckets);
 859         sysfs_print(durability,         ca->mi.durability);
 860         sysfs_print(discard,            ca->mi.discard);
 861
 862         if (attr == &sysfs_label) {
 863                 if (ca->mi.group) {
 864                         mutex_lock(&c->sb_lock);
 865                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 866                                                ca->mi.group - 1);
 867                         mutex_unlock(&c->sb_lock);
 868                 }
 869
 870                 prt_char(out, '\n');
 871         }
 872
 873         if (attr == &sysfs_has_data) {
 874                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 875                 prt_char(out, '\n');
 876         }
 877
 878         if (attr == &sysfs_state_rw) {
 879                 prt_string_option(out, bch2_member_states, ca->mi.state);
 880                 prt_char(out, '\n');
 881         }
 882
 883         if (attr == &sysfs_iodone)
 884                 dev_iodone_to_text(out, ca);
 885
 886         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 887         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 888
 889         if (attr == &sysfs_io_latency_stats_read)
 890                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 891
 892         if (attr == &sysfs_io_latency_stats_write)
 893                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 894
 895         sysfs_printf(congested,                 "%u%%",
 896                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 897                      * 100 / CONGESTED_MAX);
 898
 899         if (attr == &sysfs_alloc_debug)
 900                 dev_alloc_debug_to_text(out, ca);
 901
 902         return 0;
 903 }
 904
 905 STORE(bch2_dev)
 906 {
 907         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 908         struct bch_fs *c = ca->fs;
 909         struct bch_member *mi;
 910
 911         if (attr == &sysfs_discard) {
 912                 bool v = strtoul_or_return(buf);
 913
 914                 mutex_lock(&c->sb_lock);
 915                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 916
 917                 if (v != BCH_MEMBER_DISCARD(mi)) {
 918                         SET_BCH_MEMBER_DISCARD(mi, v);
 919                         bch2_write_super(c);
 920                 }
 921                 mutex_unlock(&c->sb_lock);
 922         }
 923
 924         if (attr == &sysfs_durability) {
 925                 u64 v = strtoul_or_return(buf);
 926
 927                 mutex_lock(&c->sb_lock);
 928                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 929
 930                 if (v != BCH_MEMBER_DURABILITY(mi)) {
 931                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 932                         bch2_write_super(c);
 933                 }
 934                 mutex_unlock(&c->sb_lock);
 935         }
 936
 937         if (attr == &sysfs_label) {
 938                 char *tmp;
 939                 int ret;
 940
 941                 tmp = kstrdup(buf, GFP_KERNEL);
 942                 if (!tmp)
 943                         return -ENOMEM;
 944
 945                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 946                 kfree(tmp);
 947                 if (ret)
 948                         return ret;
 949         }
 950
 951         return size;
 952 }
 953 SYSFS_OPS(bch2_dev);
 954
 955 struct attribute *bch2_dev_files[] = {
 956         &sysfs_uuid,
 957         &sysfs_bucket_size,
 958         &sysfs_first_bucket,
 959         &sysfs_nbuckets,
 960         &sysfs_durability,
 961
 962         /* settings: */
 963         &sysfs_discard,
 964         &sysfs_state_rw,
 965         &sysfs_label,
 966
 967         &sysfs_has_data,
 968         &sysfs_iodone,
 969
 970         &sysfs_io_latency_read,
 971         &sysfs_io_latency_write,
 972         &sysfs_io_latency_stats_read,
 973         &sysfs_io_latency_stats_write,
 974         &sysfs_congested,
 975
 976         /* debug: */
 977         &sysfs_alloc_debug,
 978         NULL
 979 };
 980
 981 #endif  /* _BCACHEFS_SYSFS_H_ */