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/sort.h>
  38 #include <linux/sched/clock.h>
  39
  40 #include "util.h"
  41
  42 #define SYSFS_OPS(type)                                                 \
  43 struct sysfs_ops type ## _sysfs_ops = {                                 \
  44         .show   = type ## _show,                                        \
  45         .store  = type ## _store                                        \
  46 }
  47
  48 #define SHOW(fn)                                                        \
  49 static ssize_t fn ## _to_text(struct printbuf *,                        \
  50                               struct kobject *, struct attribute *);\
  51                                                                         \
  52 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  53                            char *buf)                                   \
  54 {                                                                       \
  55         struct printbuf out = PRINTBUF;                                 \
  56         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  57                                                                         \
  58         if (!ret && out.allocation_failure)                             \
  59                 ret = -ENOMEM;                                          \
  60                                                                         \
  61         if (!ret) {                                                     \
  62                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  63                 memcpy(buf, out.buf, ret);                              \
  64         }                                                               \
  65         printbuf_exit(&out);                                            \
  66         return ret;                                                     \
  67 }                                                                       \
  68                                                                         \
  69 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  70                               struct attribute *attr)
  71
  72 #define STORE(fn)                                                       \
  73 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  74                             const char *buf, size_t size)               \
  75
  76 #define __sysfs_attribute(_name, _mode)                                 \
  77         static struct attribute sysfs_##_name =                         \
  78                 { .name = #_name, .mode = _mode }
  79
  80 #define write_attribute(n)      __sysfs_attribute(n, S_IWUSR)
  81 #define read_attribute(n)       __sysfs_attribute(n, S_IRUGO)
  82 #define rw_attribute(n)         __sysfs_attribute(n, S_IRUGO|S_IWUSR)
  83
  84 #define sysfs_printf(file, fmt, ...)                                    \
  85 do {                                                                    \
  86         if (attr == &sysfs_ ## file)                                    \
  87                 pr_buf(out, fmt "\n", __VA_ARGS__);                     \
  88 } while (0)
  89
  90 #define sysfs_print(file, var)                                          \
  91 do {                                                                    \
  92         if (attr == &sysfs_ ## file)                                    \
  93                 snprint(out, var);                                      \
  94 } while (0)
  95
  96 #define sysfs_hprint(file, val)                                         \
  97 do {                                                                    \
  98         if (attr == &sysfs_ ## file)                                    \
  99                 bch2_hprint(out, val);                                  \
 100 } while (0)
 101
 102 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 103 #define var_print(_var)         sysfs_print(_var, var(_var))
 104 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 105
 106 #define sysfs_strtoul(file, var)                                        \
 107 do {                                                                    \
 108         if (attr == &sysfs_ ## file)                                    \
 109                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 110 } while (0)
 111
 112 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 113 do {                                                                    \
 114         if (attr == &sysfs_ ## file)                                    \
 115                 return strtoul_safe_clamp(buf, var, min, max)           \
 116                         ?: (ssize_t) size;                              \
 117 } while (0)
 118
 119 #define strtoul_or_return(cp)                                           \
 120 ({                                                                      \
 121         unsigned long _v;                                               \
 122         int _r = kstrtoul(cp, 10, &_v);                                 \
 123         if (_r)                                                         \
 124                 return _r;                                              \
 125         _v;                                                             \
 126 })
 127
 128 #define strtoul_restrict_or_return(cp, min, max)                        \
 129 ({                                                                      \
 130         unsigned long __v = 0;                                          \
 131         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 132         if (_r)                                                         \
 133                 return _r;                                              \
 134         __v;                                                            \
 135 })
 136
 137 #define strtoi_h_or_return(cp)                                          \
 138 ({                                                                      \
 139         u64 _v;                                                         \
 140         int _r = strtoi_h(cp, &_v);                                     \
 141         if (_r)                                                         \
 142                 return _r;                                              \
 143         _v;                                                             \
 144 })
 145
 146 #define sysfs_hatoi(file, var)                                          \
 147 do {                                                                    \
 148         if (attr == &sysfs_ ## file)                                    \
 149                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 150 } while (0)
 151
 152 write_attribute(trigger_gc);
 153 write_attribute(trigger_discards);
 154 write_attribute(prune_cache);
 155 rw_attribute(btree_gc_periodic);
 156 rw_attribute(gc_gens_pos);
 157
 158 read_attribute(uuid);
 159 read_attribute(minor);
 160 read_attribute(bucket_size);
 161 read_attribute(first_bucket);
 162 read_attribute(nbuckets);
 163 read_attribute(durability);
 164 read_attribute(iodone);
 165
 166 read_attribute(io_latency_read);
 167 read_attribute(io_latency_write);
 168 read_attribute(io_latency_stats_read);
 169 read_attribute(io_latency_stats_write);
 170 read_attribute(congested);
 171
 172 read_attribute(btree_avg_write_size);
 173
 174 read_attribute(btree_cache_size);
 175 read_attribute(compression_stats);
 176 read_attribute(journal_debug);
 177 read_attribute(btree_updates);
 178 read_attribute(btree_cache);
 179 read_attribute(btree_key_cache);
 180 read_attribute(btree_transactions);
 181 read_attribute(stripes_heap);
 182 read_attribute(open_buckets);
 183
 184 read_attribute(internal_uuid);
 185
 186 read_attribute(has_data);
 187 read_attribute(alloc_debug);
 188
 189 read_attribute(read_realloc_races);
 190 read_attribute(extent_migrate_done);
 191 read_attribute(extent_migrate_raced);
 192 read_attribute(bucket_alloc_fail);
 193
 194 rw_attribute(discard);
 195 rw_attribute(label);
 196
 197 rw_attribute(copy_gc_enabled);
 198 read_attribute(copy_gc_wait);
 199
 200 rw_attribute(rebalance_enabled);
 201 sysfs_pd_controller_attribute(rebalance);
 202 read_attribute(rebalance_work);
 203 rw_attribute(promote_whole_extents);
 204
 205 read_attribute(new_stripes);
 206
 207 read_attribute(io_timers_read);
 208 read_attribute(io_timers_write);
 209
 210 read_attribute(data_jobs);
 211
 212 #ifdef CONFIG_BCACHEFS_TESTS
 213 write_attribute(perf_test);
 214 #endif /* CONFIG_BCACHEFS_TESTS */
 215
 216 #define x(_name)                                                \
 217         static struct attribute sysfs_time_stat_##_name =               \
 218                 { .name = #_name, .mode = S_IRUGO };
 219         BCH_TIME_STATS()
 220 #undef x
 221
 222 static struct attribute sysfs_state_rw = {
 223         .name = "state",
 224         .mode = S_IRUGO
 225 };
 226
 227 static size_t bch2_btree_cache_size(struct bch_fs *c)
 228 {
 229         size_t ret = 0;
 230         struct btree *b;
 231
 232         mutex_lock(&c->btree_cache.lock);
 233         list_for_each_entry(b, &c->btree_cache.live, list)
 234                 ret += btree_bytes(c);
 235
 236         mutex_unlock(&c->btree_cache.lock);
 237         return ret;
 238 }
 239
 240 static size_t bch2_btree_avg_write_size(struct bch_fs *c)
 241 {
 242         u64 nr = atomic64_read(&c->btree_writes_nr);
 243         u64 sectors = atomic64_read(&c->btree_writes_sectors);
 244
 245         return nr ? div64_u64(sectors, nr) : 0;
 246 }
 247
 248 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 249 {
 250         long ret = 0;
 251         struct bch_move_stats *stats;
 252
 253         mutex_lock(&c->data_progress_lock);
 254         list_for_each_entry(stats, &c->data_progress_list, list) {
 255                 pr_buf(out, "%s: data type %s btree_id %s position: ",
 256                        stats->name,
 257                        bch2_data_types[stats->data_type],
 258                        bch2_btree_ids[stats->btree_id]);
 259                 bch2_bpos_to_text(out, stats->pos);
 260                 pr_buf(out, "%s", "\n");
 261         }
 262
 263         mutex_unlock(&c->data_progress_lock);
 264         return ret;
 265 }
 266
 267 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 268 {
 269         struct btree_trans trans;
 270         struct btree_iter iter;
 271         struct bkey_s_c k;
 272         enum btree_id id;
 273         u64 nr_uncompressed_extents = 0,
 274             nr_compressed_extents = 0,
 275             nr_incompressible_extents = 0,
 276             uncompressed_sectors = 0,
 277             incompressible_sectors = 0,
 278             compressed_sectors_compressed = 0,
 279             compressed_sectors_uncompressed = 0;
 280         int ret;
 281
 282         if (!test_bit(BCH_FS_STARTED, &c->flags))
 283                 return -EPERM;
 284
 285         bch2_trans_init(&trans, c, 0, 0);
 286
 287         for (id = 0; id < BTREE_ID_NR; id++) {
 288                 if (!((1U << id) & BTREE_ID_HAS_PTRS))
 289                         continue;
 290
 291                 for_each_btree_key(&trans, iter, id, POS_MIN,
 292                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 293                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 294                         const union bch_extent_entry *entry;
 295                         struct extent_ptr_decoded p;
 296                         bool compressed = false, uncompressed = false, incompressible = false;
 297
 298                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 299                                 switch (p.crc.compression_type) {
 300                                 case BCH_COMPRESSION_TYPE_none:
 301                                         uncompressed = true;
 302                                         uncompressed_sectors += k.k->size;
 303                                         break;
 304                                 case BCH_COMPRESSION_TYPE_incompressible:
 305                                         incompressible = true;
 306                                         incompressible_sectors += k.k->size;
 307                                         break;
 308                                 default:
 309                                         compressed_sectors_compressed +=
 310                                                 p.crc.compressed_size;
 311                                         compressed_sectors_uncompressed +=
 312                                                 p.crc.uncompressed_size;
 313                                         compressed = true;
 314                                         break;
 315                                 }
 316                         }
 317
 318                         if (incompressible)
 319                                 nr_incompressible_extents++;
 320                         else if (uncompressed)
 321                                 nr_uncompressed_extents++;
 322                         else if (compressed)
 323                                 nr_compressed_extents++;
 324                 }
 325                 bch2_trans_iter_exit(&trans, &iter);
 326         }
 327
 328         bch2_trans_exit(&trans);
 329
 330         if (ret)
 331                 return ret;
 332
 333         pr_buf(out, "uncompressed:\n");
 334         pr_buf(out, "   nr extents:             %llu\n", nr_uncompressed_extents);
 335         pr_buf(out, "   size:                   ");
 336         bch2_hprint(out, uncompressed_sectors << 9);
 337         pr_buf(out, "\n");
 338
 339         pr_buf(out, "compressed:\n");
 340         pr_buf(out, "   nr extents:             %llu\n", nr_compressed_extents);
 341         pr_buf(out, "   compressed size:        ");
 342         bch2_hprint(out, compressed_sectors_compressed << 9);
 343         pr_buf(out, "\n");
 344         pr_buf(out, "   uncompressed size:      ");
 345         bch2_hprint(out, compressed_sectors_uncompressed << 9);
 346         pr_buf(out, "\n");
 347
 348         pr_buf(out, "incompressible:\n");
 349         pr_buf(out, "   nr extents:             %llu\n", nr_incompressible_extents);
 350         pr_buf(out, "   size:                   ");
 351         bch2_hprint(out, incompressible_sectors << 9);
 352         pr_buf(out, "\n");
 353         return 0;
 354 }
 355
 356 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 357 {
 358         pr_buf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 359         bch2_bpos_to_text(out, c->gc_gens_pos);
 360         pr_buf(out, "\n");
 361 }
 362
 363 SHOW(bch2_fs)
 364 {
 365         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 366
 367         sysfs_print(minor,                      c->minor);
 368         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 369
 370         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 371         sysfs_hprint(btree_avg_write_size,      bch2_btree_avg_write_size(c));
 372
 373         sysfs_print(read_realloc_races,
 374                     atomic_long_read(&c->read_realloc_races));
 375         sysfs_print(extent_migrate_done,
 376                     atomic_long_read(&c->extent_migrate_done));
 377         sysfs_print(extent_migrate_raced,
 378                     atomic_long_read(&c->extent_migrate_raced));
 379         sysfs_print(bucket_alloc_fail,
 380                     atomic_long_read(&c->bucket_alloc_fail));
 381
 382         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 383
 384         if (attr == &sysfs_gc_gens_pos)
 385                 bch2_gc_gens_pos_to_text(out, c);
 386
 387         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 388
 389         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 390         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 391         sysfs_hprint(copy_gc_wait,
 392                      max(0LL, c->copygc_wait -
 393                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 394
 395         if (attr == &sysfs_rebalance_work)
 396                 bch2_rebalance_work_to_text(out, c);
 397
 398         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 399
 400         /* Debugging: */
 401
 402         if (attr == &sysfs_journal_debug)
 403                 bch2_journal_debug_to_text(out, &c->journal);
 404
 405         if (attr == &sysfs_btree_updates)
 406                 bch2_btree_updates_to_text(out, c);
 407
 408         if (attr == &sysfs_btree_cache)
 409                 bch2_btree_cache_to_text(out, c);
 410
 411         if (attr == &sysfs_btree_key_cache)
 412                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 413
 414         if (attr == &sysfs_btree_transactions)
 415                 bch2_btree_trans_to_text(out, c);
 416
 417         if (attr == &sysfs_stripes_heap)
 418                 bch2_stripes_heap_to_text(out, c);
 419
 420         if (attr == &sysfs_open_buckets)
 421                 bch2_open_buckets_to_text(out, c);
 422
 423         if (attr == &sysfs_compression_stats)
 424                 bch2_compression_stats_to_text(out, c);
 425
 426         if (attr == &sysfs_new_stripes)
 427                 bch2_new_stripes_to_text(out, c);
 428
 429         if (attr == &sysfs_io_timers_read)
 430                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 431
 432         if (attr == &sysfs_io_timers_write)
 433                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 434
 435         if (attr == &sysfs_data_jobs)
 436                 data_progress_to_text(out, c);
 437
 438         return 0;
 439 }
 440
 441 STORE(bch2_fs)
 442 {
 443         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 444
 445         if (attr == &sysfs_btree_gc_periodic) {
 446                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 447                         ?: (ssize_t) size;
 448
 449                 wake_up_process(c->gc_thread);
 450                 return ret;
 451         }
 452
 453         if (attr == &sysfs_copy_gc_enabled) {
 454                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 455                         ?: (ssize_t) size;
 456
 457                 if (c->copygc_thread)
 458                         wake_up_process(c->copygc_thread);
 459                 return ret;
 460         }
 461
 462         if (attr == &sysfs_rebalance_enabled) {
 463                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 464                         ?: (ssize_t) size;
 465
 466                 rebalance_wakeup(c);
 467                 return ret;
 468         }
 469
 470         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 471
 472         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 473
 474         /* Debugging: */
 475
 476         if (!test_bit(BCH_FS_STARTED, &c->flags))
 477                 return -EPERM;
 478
 479         /* Debugging: */
 480
 481         if (!test_bit(BCH_FS_RW, &c->flags))
 482                 return -EROFS;
 483
 484         if (attr == &sysfs_prune_cache) {
 485                 struct shrink_control sc;
 486
 487                 sc.gfp_mask = GFP_KERNEL;
 488                 sc.nr_to_scan = strtoul_or_return(buf);
 489                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 490         }
 491
 492         if (attr == &sysfs_trigger_gc) {
 493                 /*
 494                  * Full gc is currently incompatible with btree key cache:
 495                  */
 496 #if 0
 497                 down_read(&c->state_lock);
 498                 bch2_gc(c, false, false);
 499                 up_read(&c->state_lock);
 500 #else
 501                 bch2_gc_gens(c);
 502 #endif
 503         }
 504
 505         if (attr == &sysfs_trigger_discards)
 506                 bch2_do_discards(c);
 507
 508 #ifdef CONFIG_BCACHEFS_TESTS
 509         if (attr == &sysfs_perf_test) {
 510                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 511                 char *test              = strsep(&p, " \t\n");
 512                 char *nr_str            = strsep(&p, " \t\n");
 513                 char *threads_str       = strsep(&p, " \t\n");
 514                 unsigned threads;
 515                 u64 nr;
 516                 int ret = -EINVAL;
 517
 518                 if (threads_str &&
 519                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 520                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 521                         ret = bch2_btree_perf_test(c, test, nr, threads);
 522                 kfree(tmp);
 523
 524                 if (ret)
 525                         size = ret;
 526         }
 527 #endif
 528         return size;
 529 }
 530 SYSFS_OPS(bch2_fs);
 531
 532 struct attribute *bch2_fs_files[] = {
 533         &sysfs_minor,
 534         &sysfs_btree_cache_size,
 535         &sysfs_btree_avg_write_size,
 536
 537         &sysfs_promote_whole_extents,
 538
 539         &sysfs_compression_stats,
 540
 541 #ifdef CONFIG_BCACHEFS_TESTS
 542         &sysfs_perf_test,
 543 #endif
 544         NULL
 545 };
 546
 547 /* internal dir - just a wrapper */
 548
 549 SHOW(bch2_fs_internal)
 550 {
 551         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 552         return bch2_fs_to_text(out, &c->kobj, attr);
 553 }
 554
 555 STORE(bch2_fs_internal)
 556 {
 557         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 558         return bch2_fs_store(&c->kobj, attr, buf, size);
 559 }
 560 SYSFS_OPS(bch2_fs_internal);
 561
 562 struct attribute *bch2_fs_internal_files[] = {
 563         &sysfs_journal_debug,
 564         &sysfs_btree_updates,
 565         &sysfs_btree_cache,
 566         &sysfs_btree_key_cache,
 567         &sysfs_btree_transactions,
 568         &sysfs_new_stripes,
 569         &sysfs_stripes_heap,
 570         &sysfs_open_buckets,
 571         &sysfs_io_timers_read,
 572         &sysfs_io_timers_write,
 573
 574         &sysfs_trigger_gc,
 575         &sysfs_trigger_discards,
 576         &sysfs_prune_cache,
 577
 578         &sysfs_read_realloc_races,
 579         &sysfs_extent_migrate_done,
 580         &sysfs_extent_migrate_raced,
 581         &sysfs_bucket_alloc_fail,
 582
 583         &sysfs_gc_gens_pos,
 584
 585         &sysfs_copy_gc_enabled,
 586         &sysfs_copy_gc_wait,
 587
 588         &sysfs_rebalance_enabled,
 589         &sysfs_rebalance_work,
 590         sysfs_pd_controller_files(rebalance),
 591
 592         &sysfs_data_jobs,
 593
 594         &sysfs_internal_uuid,
 595         NULL
 596 };
 597
 598 /* options */
 599
 600 SHOW(bch2_fs_opts_dir)
 601 {
 602         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 603         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 604         int id = opt - bch2_opt_table;
 605         u64 v = bch2_opt_get_by_id(&c->opts, id);
 606
 607         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 608         pr_char(out, '\n');
 609
 610         return 0;
 611 }
 612
 613 STORE(bch2_fs_opts_dir)
 614 {
 615         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 616         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 617         int ret = size, id = opt - bch2_opt_table;
 618         char *tmp;
 619         u64 v;
 620
 621         /*
 622          * We don't need to take c->writes for correctness, but it eliminates an
 623          * unsightly error message in the dmesg log when we're RO:
 624          */
 625         if (unlikely(!percpu_ref_tryget(&c->writes)))
 626                 return -EROFS;
 627
 628         tmp = kstrdup(buf, GFP_KERNEL);
 629         if (!tmp) {
 630                 ret = -ENOMEM;
 631                 goto err;
 632         }
 633
 634         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 635         kfree(tmp);
 636
 637         if (ret < 0)
 638                 goto err;
 639
 640         ret = bch2_opt_check_may_set(c, id, v);
 641         if (ret < 0)
 642                 goto err;
 643
 644         bch2_opt_set_sb(c, opt, v);
 645         bch2_opt_set_by_id(&c->opts, id, v);
 646
 647         if ((id == Opt_background_target ||
 648              id == Opt_background_compression) && v) {
 649                 bch2_rebalance_add_work(c, S64_MAX);
 650                 rebalance_wakeup(c);
 651         }
 652 err:
 653         percpu_ref_put(&c->writes);
 654         return ret;
 655 }
 656 SYSFS_OPS(bch2_fs_opts_dir);
 657
 658 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 659
 660 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 661 {
 662         const struct bch_option *i;
 663         int ret;
 664
 665         for (i = bch2_opt_table;
 666              i < bch2_opt_table + bch2_opts_nr;
 667              i++) {
 668                 if (!(i->flags & OPT_FS))
 669                         continue;
 670
 671                 ret = sysfs_create_file(kobj, &i->attr);
 672                 if (ret)
 673                         return ret;
 674         }
 675
 676         return 0;
 677 }
 678
 679 /* time stats */
 680
 681 SHOW(bch2_fs_time_stats)
 682 {
 683         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 684
 685 #define x(name)                                                         \
 686         if (attr == &sysfs_time_stat_##name)                            \
 687                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 688         BCH_TIME_STATS()
 689 #undef x
 690
 691         return 0;
 692 }
 693
 694 STORE(bch2_fs_time_stats)
 695 {
 696         return size;
 697 }
 698 SYSFS_OPS(bch2_fs_time_stats);
 699
 700 struct attribute *bch2_fs_time_stats_files[] = {
 701 #define x(name)                                         \
 702         &sysfs_time_stat_##name,
 703         BCH_TIME_STATS()
 704 #undef x
 705         NULL
 706 };
 707
 708 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 709 {
 710         struct bch_fs *c = ca->fs;
 711         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 712         unsigned i, nr[BCH_DATA_NR];
 713
 714         memset(nr, 0, sizeof(nr));
 715
 716         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 717                 nr[c->open_buckets[i].data_type]++;
 718
 719         pr_buf(out,
 720                "\t\t\t buckets\t sectors      fragmented\n"
 721                "capacity\t%16llu\n",
 722                ca->mi.nbuckets - ca->mi.first_bucket);
 723
 724         for (i = 0; i < BCH_DATA_NR; i++)
 725                 pr_buf(out, "%-16s%16llu%16llu%16llu\n",
 726                        bch2_data_types[i], stats.d[i].buckets,
 727                        stats.d[i].sectors, stats.d[i].fragmented);
 728
 729         pr_buf(out,
 730                "ec\t\t%16llu\n"
 731                "\n"
 732                "freelist_wait\t\t%s\n"
 733                "open buckets allocated\t%u\n"
 734                "open buckets this dev\t%u\n"
 735                "open buckets total\t%u\n"
 736                "open_buckets_wait\t%s\n"
 737                "open_buckets_btree\t%u\n"
 738                "open_buckets_user\t%u\n"
 739                "btree reserve cache\t%u\n",
 740                stats.buckets_ec,
 741                c->freelist_wait.list.first              ? "waiting" : "empty",
 742                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 743                ca->nr_open_buckets,
 744                OPEN_BUCKETS_COUNT,
 745                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 746                nr[BCH_DATA_btree],
 747                nr[BCH_DATA_user],
 748                c->btree_reserve_cache_nr);
 749 }
 750
 751 static const char * const bch2_rw[] = {
 752         "read",
 753         "write",
 754         NULL
 755 };
 756
 757 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 758 {
 759         int rw, i;
 760
 761         for (rw = 0; rw < 2; rw++) {
 762                 pr_buf(out, "%s:\n", bch2_rw[rw]);
 763
 764                 for (i = 1; i < BCH_DATA_NR; i++)
 765                         pr_buf(out, "%-12s:%12llu\n",
 766                                bch2_data_types[i],
 767                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 768         }
 769 }
 770
 771 SHOW(bch2_dev)
 772 {
 773         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 774         struct bch_fs *c = ca->fs;
 775
 776         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 777
 778         sysfs_print(bucket_size,        bucket_bytes(ca));
 779         sysfs_print(first_bucket,       ca->mi.first_bucket);
 780         sysfs_print(nbuckets,           ca->mi.nbuckets);
 781         sysfs_print(durability,         ca->mi.durability);
 782         sysfs_print(discard,            ca->mi.discard);
 783
 784         if (attr == &sysfs_label) {
 785                 if (ca->mi.group) {
 786                         mutex_lock(&c->sb_lock);
 787                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 788                                                ca->mi.group - 1);
 789                         mutex_unlock(&c->sb_lock);
 790                 }
 791
 792                 pr_char(out, '\n');
 793         }
 794
 795         if (attr == &sysfs_has_data) {
 796                 bch2_flags_to_text(out, bch2_data_types,
 797                                    bch2_dev_has_data(c, ca));
 798                 pr_char(out, '\n');
 799         }
 800
 801         if (attr == &sysfs_state_rw) {
 802                 bch2_string_opt_to_text(out, bch2_member_states,
 803                                         ca->mi.state);
 804                 pr_char(out, '\n');
 805         }
 806
 807         if (attr == &sysfs_iodone)
 808                 dev_iodone_to_text(out, ca);
 809
 810         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 811         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 812
 813         if (attr == &sysfs_io_latency_stats_read)
 814                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 815
 816         if (attr == &sysfs_io_latency_stats_write)
 817                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 818
 819         sysfs_printf(congested,                 "%u%%",
 820                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 821                      * 100 / CONGESTED_MAX);
 822
 823         if (attr == &sysfs_alloc_debug)
 824                 dev_alloc_debug_to_text(out, ca);
 825
 826         return 0;
 827 }
 828
 829 STORE(bch2_dev)
 830 {
 831         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 832         struct bch_fs *c = ca->fs;
 833         struct bch_member *mi;
 834
 835         if (attr == &sysfs_discard) {
 836                 bool v = strtoul_or_return(buf);
 837
 838                 mutex_lock(&c->sb_lock);
 839                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 840
 841                 if (v != BCH_MEMBER_DISCARD(mi)) {
 842                         SET_BCH_MEMBER_DISCARD(mi, v);
 843                         bch2_write_super(c);
 844                 }
 845                 mutex_unlock(&c->sb_lock);
 846         }
 847
 848         if (attr == &sysfs_label) {
 849                 char *tmp;
 850                 int ret;
 851
 852                 tmp = kstrdup(buf, GFP_KERNEL);
 853                 if (!tmp)
 854                         return -ENOMEM;
 855
 856                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 857                 kfree(tmp);
 858                 if (ret)
 859                         return ret;
 860         }
 861
 862         return size;
 863 }
 864 SYSFS_OPS(bch2_dev);
 865
 866 struct attribute *bch2_dev_files[] = {
 867         &sysfs_uuid,
 868         &sysfs_bucket_size,
 869         &sysfs_first_bucket,
 870         &sysfs_nbuckets,
 871         &sysfs_durability,
 872
 873         /* settings: */
 874         &sysfs_discard,
 875         &sysfs_state_rw,
 876         &sysfs_label,
 877
 878         &sysfs_has_data,
 879         &sysfs_iodone,
 880
 881         &sysfs_io_latency_read,
 882         &sysfs_io_latency_write,
 883         &sysfs_io_latency_stats_read,
 884         &sysfs_io_latency_stats_write,
 885         &sysfs_congested,
 886
 887         /* debug: */
 888         &sysfs_alloc_debug,
 889         NULL
 890 };
 891
 892 #endif  /* _BCACHEFS_SYSFS_H_ */