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 "nocow_locking.h"
  31 #include "opts.h"
  32 #include "rebalance.h"
  33 #include "replicas.h"
  34 #include "super-io.h"
  35 #include "tests.h"
  36
  37 #include <linux/blkdev.h>
  38 #include <linux/pretty-printers.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 var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 117 #define var_print(_var)         sysfs_print(_var, var(_var))
 118 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 119
 120 #define sysfs_strtoul(file, var)                                        \
 121 do {                                                                    \
 122         if (attr == &sysfs_ ## file)                                    \
 123                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 124 } while (0)
 125
 126 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 127 do {                                                                    \
 128         if (attr == &sysfs_ ## file)                                    \
 129                 return strtoul_safe_clamp(buf, var, min, max)           \
 130                         ?: (ssize_t) size;                              \
 131 } while (0)
 132
 133 #define strtoul_or_return(cp)                                           \
 134 ({                                                                      \
 135         unsigned long _v;                                               \
 136         int _r = kstrtoul(cp, 10, &_v);                                 \
 137         if (_r)                                                         \
 138                 return _r;                                              \
 139         _v;                                                             \
 140 })
 141
 142 #define strtoul_restrict_or_return(cp, min, max)                        \
 143 ({                                                                      \
 144         unsigned long __v = 0;                                          \
 145         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 146         if (_r)                                                         \
 147                 return _r;                                              \
 148         __v;                                                            \
 149 })
 150
 151 #define strtoi_h_or_return(cp)                                          \
 152 ({                                                                      \
 153         u64 _v;                                                         \
 154         int _r = strtoi_h(cp, &_v);                                     \
 155         if (_r)                                                         \
 156                 return _r;                                              \
 157         _v;                                                             \
 158 })
 159
 160 #define sysfs_hatoi(file, var)                                          \
 161 do {                                                                    \
 162         if (attr == &sysfs_ ## file)                                    \
 163                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 164 } while (0)
 165
 166 write_attribute(trigger_gc);
 167 write_attribute(trigger_discards);
 168 write_attribute(trigger_invalidates);
 169 write_attribute(prune_cache);
 170 write_attribute(btree_wakeup);
 171 rw_attribute(btree_gc_periodic);
 172 rw_attribute(gc_gens_pos);
 173
 174 read_attribute(uuid);
 175 read_attribute(minor);
 176 read_attribute(bucket_size);
 177 read_attribute(first_bucket);
 178 read_attribute(nbuckets);
 179 rw_attribute(durability);
 180 read_attribute(iodone);
 181
 182 read_attribute(io_latency_read);
 183 read_attribute(io_latency_write);
 184 read_attribute(io_latency_stats_read);
 185 read_attribute(io_latency_stats_write);
 186 read_attribute(congested);
 187
 188 read_attribute(btree_write_stats);
 189
 190 read_attribute(btree_cache_size);
 191 read_attribute(compression_stats);
 192 read_attribute(journal_debug);
 193 read_attribute(btree_updates);
 194 read_attribute(btree_cache);
 195 read_attribute(btree_key_cache);
 196 read_attribute(stripes_heap);
 197 read_attribute(open_buckets);
 198 read_attribute(nocow_lock_table);
 199
 200 read_attribute(internal_uuid);
 201
 202 read_attribute(has_data);
 203 read_attribute(alloc_debug);
 204
 205 #define x(t, n, ...) read_attribute(t);
 206 BCH_PERSISTENT_COUNTERS()
 207 #undef x
 208
 209 rw_attribute(discard);
 210 rw_attribute(label);
 211
 212 rw_attribute(copy_gc_enabled);
 213 read_attribute(copy_gc_wait);
 214
 215 rw_attribute(rebalance_enabled);
 216 sysfs_pd_controller_attribute(rebalance);
 217 read_attribute(rebalance_work);
 218 rw_attribute(promote_whole_extents);
 219
 220 read_attribute(new_stripes);
 221
 222 read_attribute(io_timers_read);
 223 read_attribute(io_timers_write);
 224
 225 read_attribute(data_jobs);
 226
 227 #ifdef CONFIG_BCACHEFS_TESTS
 228 write_attribute(perf_test);
 229 #endif /* CONFIG_BCACHEFS_TESTS */
 230
 231 #define x(_name)                                                \
 232         static struct attribute sysfs_time_stat_##_name =               \
 233                 { .name = #_name, .mode = 0444 };
 234         BCH_TIME_STATS()
 235 #undef x
 236
 237 static struct attribute sysfs_state_rw = {
 238         .name = "state",
 239         .mode =  0444,
 240 };
 241
 242 static size_t bch2_btree_cache_size(struct bch_fs *c)
 243 {
 244         size_t ret = 0;
 245         struct btree *b;
 246
 247         mutex_lock(&c->btree_cache.lock);
 248         list_for_each_entry(b, &c->btree_cache.live, list)
 249                 ret += btree_bytes(c);
 250
 251         mutex_unlock(&c->btree_cache.lock);
 252         return ret;
 253 }
 254
 255 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 256 {
 257         long ret = 0;
 258         struct bch_move_stats *stats;
 259
 260         mutex_lock(&c->data_progress_lock);
 261         list_for_each_entry(stats, &c->data_progress_list, list) {
 262                 prt_printf(out, "%s: data type %s btree_id %s position: ",
 263                        stats->name,
 264                        bch2_data_types[stats->data_type],
 265                        bch2_btree_ids[stats->btree_id]);
 266                 bch2_bpos_to_text(out, stats->pos);
 267                 prt_printf(out, "%s", "\n");
 268         }
 269
 270         mutex_unlock(&c->data_progress_lock);
 271         return ret;
 272 }
 273
 274 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 275 {
 276         struct btree_trans trans;
 277         struct btree_iter iter;
 278         struct bkey_s_c k;
 279         enum btree_id id;
 280         u64 nr_uncompressed_extents = 0,
 281             nr_compressed_extents = 0,
 282             nr_incompressible_extents = 0,
 283             uncompressed_sectors = 0,
 284             incompressible_sectors = 0,
 285             compressed_sectors_compressed = 0,
 286             compressed_sectors_uncompressed = 0;
 287         int ret;
 288
 289         if (!test_bit(BCH_FS_STARTED, &c->flags))
 290                 return -EPERM;
 291
 292         bch2_trans_init(&trans, c, 0, 0);
 293
 294         for (id = 0; id < BTREE_ID_NR; id++) {
 295                 if (!btree_type_has_ptrs(id))
 296                         continue;
 297
 298                 for_each_btree_key(&trans, iter, id, POS_MIN,
 299                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 300                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 301                         const union bch_extent_entry *entry;
 302                         struct extent_ptr_decoded p;
 303                         bool compressed = false, uncompressed = false, incompressible = false;
 304
 305                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 306                                 switch (p.crc.compression_type) {
 307                                 case BCH_COMPRESSION_TYPE_none:
 308                                         uncompressed = true;
 309                                         uncompressed_sectors += k.k->size;
 310                                         break;
 311                                 case BCH_COMPRESSION_TYPE_incompressible:
 312                                         incompressible = true;
 313                                         incompressible_sectors += k.k->size;
 314                                         break;
 315                                 default:
 316                                         compressed_sectors_compressed +=
 317                                                 p.crc.compressed_size;
 318                                         compressed_sectors_uncompressed +=
 319                                                 p.crc.uncompressed_size;
 320                                         compressed = true;
 321                                         break;
 322                                 }
 323                         }
 324
 325                         if (incompressible)
 326                                 nr_incompressible_extents++;
 327                         else if (uncompressed)
 328                                 nr_uncompressed_extents++;
 329                         else if (compressed)
 330                                 nr_compressed_extents++;
 331                 }
 332                 bch2_trans_iter_exit(&trans, &iter);
 333         }
 334
 335         bch2_trans_exit(&trans);
 336
 337         if (ret)
 338                 return ret;
 339
 340         prt_printf(out, "uncompressed:\n");
 341         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 342         prt_printf(out, "       size:                   ");
 343         prt_human_readable_u64(out, uncompressed_sectors << 9);
 344         prt_printf(out, "\n");
 345
 346         prt_printf(out, "compressed:\n");
 347         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 348         prt_printf(out, "       compressed size:        ");
 349         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 350         prt_printf(out, "\n");
 351         prt_printf(out, "       uncompressed size:      ");
 352         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 353         prt_printf(out, "\n");
 354
 355         prt_printf(out, "incompressible:\n");
 356         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 357         prt_printf(out, "       size:                   ");
 358         prt_human_readable_u64(out, incompressible_sectors << 9);
 359         prt_printf(out, "\n");
 360         return 0;
 361 }
 362
 363 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 364 {
 365         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 366         bch2_bpos_to_text(out, c->gc_gens_pos);
 367         prt_printf(out, "\n");
 368 }
 369
 370 static void bch2_btree_wakeup_all(struct bch_fs *c)
 371 {
 372         struct btree_trans *trans;
 373
 374         mutex_lock(&c->btree_trans_lock);
 375         list_for_each_entry(trans, &c->btree_trans_list, list) {
 376                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 377
 378                 if (b)
 379                         six_lock_wakeup_all(&b->lock);
 380
 381         }
 382         mutex_unlock(&c->btree_trans_lock);
 383 }
 384
 385 SHOW(bch2_fs)
 386 {
 387         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 388
 389         sysfs_print(minor,                      c->minor);
 390         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 391
 392         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 393
 394         if (attr == &sysfs_btree_write_stats)
 395                 bch2_btree_write_stats_to_text(out, c);
 396
 397         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 398
 399         if (attr == &sysfs_gc_gens_pos)
 400                 bch2_gc_gens_pos_to_text(out, c);
 401
 402         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 403
 404         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 405         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 406         sysfs_hprint(copy_gc_wait,
 407                      max(0LL, c->copygc_wait -
 408                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 409
 410         if (attr == &sysfs_rebalance_work)
 411                 bch2_rebalance_work_to_text(out, c);
 412
 413         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 414
 415         /* Debugging: */
 416
 417         if (attr == &sysfs_journal_debug)
 418                 bch2_journal_debug_to_text(out, &c->journal);
 419
 420         if (attr == &sysfs_btree_updates)
 421                 bch2_btree_updates_to_text(out, c);
 422
 423         if (attr == &sysfs_btree_cache)
 424                 bch2_btree_cache_to_text(out, &c->btree_cache);
 425
 426         if (attr == &sysfs_btree_key_cache)
 427                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 428
 429         if (attr == &sysfs_stripes_heap)
 430                 bch2_stripes_heap_to_text(out, c);
 431
 432         if (attr == &sysfs_open_buckets)
 433                 bch2_open_buckets_to_text(out, c);
 434
 435         if (attr == &sysfs_compression_stats)
 436                 bch2_compression_stats_to_text(out, c);
 437
 438         if (attr == &sysfs_new_stripes)
 439                 bch2_new_stripes_to_text(out, c);
 440
 441         if (attr == &sysfs_io_timers_read)
 442                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 443
 444         if (attr == &sysfs_io_timers_write)
 445                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 446
 447         if (attr == &sysfs_data_jobs)
 448                 data_progress_to_text(out, c);
 449
 450         if (attr == &sysfs_nocow_lock_table)
 451                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 452
 453         return 0;
 454 }
 455
 456 STORE(bch2_fs)
 457 {
 458         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 459
 460         if (attr == &sysfs_btree_gc_periodic) {
 461                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 462                         ?: (ssize_t) size;
 463
 464                 wake_up_process(c->gc_thread);
 465                 return ret;
 466         }
 467
 468         if (attr == &sysfs_copy_gc_enabled) {
 469                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 470                         ?: (ssize_t) size;
 471
 472                 if (c->copygc_thread)
 473                         wake_up_process(c->copygc_thread);
 474                 return ret;
 475         }
 476
 477         if (attr == &sysfs_rebalance_enabled) {
 478                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 479                         ?: (ssize_t) size;
 480
 481                 rebalance_wakeup(c);
 482                 return ret;
 483         }
 484
 485         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 486
 487         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 488
 489         /* Debugging: */
 490
 491         if (!test_bit(BCH_FS_STARTED, &c->flags))
 492                 return -EPERM;
 493
 494         /* Debugging: */
 495
 496         if (!test_bit(BCH_FS_RW, &c->flags))
 497                 return -EROFS;
 498
 499         if (attr == &sysfs_prune_cache) {
 500                 struct shrink_control sc;
 501
 502                 sc.gfp_mask = GFP_KERNEL;
 503                 sc.nr_to_scan = strtoul_or_return(buf);
 504                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 505         }
 506
 507         if (attr == &sysfs_btree_wakeup)
 508                 bch2_btree_wakeup_all(c);
 509
 510         if (attr == &sysfs_trigger_gc) {
 511                 /*
 512                  * Full gc is currently incompatible with btree key cache:
 513                  */
 514 #if 0
 515                 down_read(&c->state_lock);
 516                 bch2_gc(c, false, false);
 517                 up_read(&c->state_lock);
 518 #else
 519                 bch2_gc_gens(c);
 520 #endif
 521         }
 522
 523         if (attr == &sysfs_trigger_discards)
 524                 bch2_do_discards(c);
 525
 526         if (attr == &sysfs_trigger_invalidates)
 527                 bch2_do_invalidates(c);
 528
 529 #ifdef CONFIG_BCACHEFS_TESTS
 530         if (attr == &sysfs_perf_test) {
 531                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 532                 char *test              = strsep(&p, " \t\n");
 533                 char *nr_str            = strsep(&p, " \t\n");
 534                 char *threads_str       = strsep(&p, " \t\n");
 535                 unsigned threads;
 536                 u64 nr;
 537                 int ret = -EINVAL;
 538
 539                 if (threads_str &&
 540                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 541                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 542                         ret = bch2_btree_perf_test(c, test, nr, threads);
 543                 kfree(tmp);
 544
 545                 if (ret)
 546                         size = ret;
 547         }
 548 #endif
 549         return size;
 550 }
 551 SYSFS_OPS(bch2_fs);
 552
 553 struct attribute *bch2_fs_files[] = {
 554         &sysfs_minor,
 555         &sysfs_btree_cache_size,
 556         &sysfs_btree_write_stats,
 557
 558         &sysfs_promote_whole_extents,
 559
 560         &sysfs_compression_stats,
 561
 562 #ifdef CONFIG_BCACHEFS_TESTS
 563         &sysfs_perf_test,
 564 #endif
 565         NULL
 566 };
 567
 568 /* counters dir */
 569
 570 SHOW(bch2_fs_counters)
 571 {
 572         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 573         u64 counter = 0;
 574         u64 counter_since_mount = 0;
 575
 576         printbuf_tabstop_push(out, 32);
 577
 578         #define x(t, ...) \
 579                 if (attr == &sysfs_##t) {                                       \
 580                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 581                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 582                         prt_printf(out, "since mount:");                                \
 583                         prt_tab(out);                                           \
 584                         prt_human_readable_u64(out, counter_since_mount << 9);  \
 585                         prt_newline(out);                                       \
 586                                                                                 \
 587                         prt_printf(out, "since filesystem creation:");          \
 588                         prt_tab(out);                                           \
 589                         prt_human_readable_u64(out, counter << 9);              \
 590                         prt_newline(out);                                       \
 591                 }
 592         BCH_PERSISTENT_COUNTERS()
 593         #undef x
 594         return 0;
 595 }
 596
 597 STORE(bch2_fs_counters) {
 598         return 0;
 599 }
 600
 601 SYSFS_OPS(bch2_fs_counters);
 602
 603 struct attribute *bch2_fs_counters_files[] = {
 604 #define x(t, ...) \
 605         &sysfs_##t,
 606         BCH_PERSISTENT_COUNTERS()
 607 #undef x
 608         NULL
 609 };
 610 /* internal dir - just a wrapper */
 611
 612 SHOW(bch2_fs_internal)
 613 {
 614         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 615
 616         return bch2_fs_to_text(out, &c->kobj, attr);
 617 }
 618
 619 STORE(bch2_fs_internal)
 620 {
 621         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 622
 623         return bch2_fs_store(&c->kobj, attr, buf, size);
 624 }
 625 SYSFS_OPS(bch2_fs_internal);
 626
 627 struct attribute *bch2_fs_internal_files[] = {
 628         &sysfs_journal_debug,
 629         &sysfs_btree_updates,
 630         &sysfs_btree_cache,
 631         &sysfs_btree_key_cache,
 632         &sysfs_new_stripes,
 633         &sysfs_stripes_heap,
 634         &sysfs_open_buckets,
 635         &sysfs_nocow_lock_table,
 636         &sysfs_io_timers_read,
 637         &sysfs_io_timers_write,
 638
 639         &sysfs_trigger_gc,
 640         &sysfs_trigger_discards,
 641         &sysfs_trigger_invalidates,
 642         &sysfs_prune_cache,
 643         &sysfs_btree_wakeup,
 644
 645         &sysfs_gc_gens_pos,
 646
 647         &sysfs_copy_gc_enabled,
 648         &sysfs_copy_gc_wait,
 649
 650         &sysfs_rebalance_enabled,
 651         &sysfs_rebalance_work,
 652         sysfs_pd_controller_files(rebalance),
 653
 654         &sysfs_data_jobs,
 655
 656         &sysfs_internal_uuid,
 657         NULL
 658 };
 659
 660 /* options */
 661
 662 SHOW(bch2_fs_opts_dir)
 663 {
 664         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 665         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 666         int id = opt - bch2_opt_table;
 667         u64 v = bch2_opt_get_by_id(&c->opts, id);
 668
 669         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 670         prt_char(out, '\n');
 671
 672         return 0;
 673 }
 674
 675 STORE(bch2_fs_opts_dir)
 676 {
 677         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 678         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 679         int ret, id = opt - bch2_opt_table;
 680         char *tmp;
 681         u64 v;
 682
 683         /*
 684          * We don't need to take c->writes for correctness, but it eliminates an
 685          * unsightly error message in the dmesg log when we're RO:
 686          */
 687         if (unlikely(!percpu_ref_tryget_live(&c->writes)))
 688                 return -EROFS;
 689
 690         tmp = kstrdup(buf, GFP_KERNEL);
 691         if (!tmp) {
 692                 ret = -ENOMEM;
 693                 goto err;
 694         }
 695
 696         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 697         kfree(tmp);
 698
 699         if (ret < 0)
 700                 goto err;
 701
 702         ret = bch2_opt_check_may_set(c, id, v);
 703         if (ret < 0)
 704                 goto err;
 705
 706         bch2_opt_set_sb(c, opt, v);
 707         bch2_opt_set_by_id(&c->opts, id, v);
 708
 709         if ((id == Opt_background_target ||
 710              id == Opt_background_compression) && v) {
 711                 bch2_rebalance_add_work(c, S64_MAX);
 712                 rebalance_wakeup(c);
 713         }
 714
 715         ret = size;
 716 err:
 717         percpu_ref_put(&c->writes);
 718         return ret;
 719 }
 720 SYSFS_OPS(bch2_fs_opts_dir);
 721
 722 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 723
 724 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 725 {
 726         const struct bch_option *i;
 727         int ret;
 728
 729         for (i = bch2_opt_table;
 730              i < bch2_opt_table + bch2_opts_nr;
 731              i++) {
 732                 if (!(i->flags & OPT_FS))
 733                         continue;
 734
 735                 ret = sysfs_create_file(kobj, &i->attr);
 736                 if (ret)
 737                         return ret;
 738         }
 739
 740         return 0;
 741 }
 742
 743 /* time stats */
 744
 745 SHOW(bch2_fs_time_stats)
 746 {
 747         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 748
 749 #define x(name)                                                         \
 750         if (attr == &sysfs_time_stat_##name)                            \
 751                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 752         BCH_TIME_STATS()
 753 #undef x
 754
 755         return 0;
 756 }
 757
 758 STORE(bch2_fs_time_stats)
 759 {
 760         return size;
 761 }
 762 SYSFS_OPS(bch2_fs_time_stats);
 763
 764 struct attribute *bch2_fs_time_stats_files[] = {
 765 #define x(name)                                         \
 766         &sysfs_time_stat_##name,
 767         BCH_TIME_STATS()
 768 #undef x
 769         NULL
 770 };
 771
 772 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 773 {
 774         struct bch_fs *c = ca->fs;
 775         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 776         unsigned i, nr[BCH_DATA_NR];
 777
 778         memset(nr, 0, sizeof(nr));
 779
 780         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 781                 nr[c->open_buckets[i].data_type]++;
 782
 783         prt_printf(out,
 784                "\t\t\t buckets\t sectors      fragmented\n"
 785                "capacity\t%16llu\n",
 786                ca->mi.nbuckets - ca->mi.first_bucket);
 787
 788         for (i = 0; i < BCH_DATA_NR; i++)
 789                 prt_printf(out, "%-16s%16llu%16llu%16llu\n",
 790                        bch2_data_types[i], stats.d[i].buckets,
 791                        stats.d[i].sectors, stats.d[i].fragmented);
 792
 793         prt_printf(out,
 794                "ec\t\t%16llu\n"
 795                "\n"
 796                "freelist_wait\t\t%s\n"
 797                "open buckets allocated\t%u\n"
 798                "open buckets this dev\t%u\n"
 799                "open buckets total\t%u\n"
 800                "open_buckets_wait\t%s\n"
 801                "open_buckets_btree\t%u\n"
 802                "open_buckets_user\t%u\n"
 803                "buckets_to_invalidate\t%llu\n"
 804                "btree reserve cache\t%u\n",
 805                stats.buckets_ec,
 806                c->freelist_wait.list.first              ? "waiting" : "empty",
 807                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 808                ca->nr_open_buckets,
 809                OPEN_BUCKETS_COUNT,
 810                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 811                nr[BCH_DATA_btree],
 812                nr[BCH_DATA_user],
 813                should_invalidate_buckets(ca, stats),
 814                c->btree_reserve_cache_nr);
 815 }
 816
 817 static const char * const bch2_rw[] = {
 818         "read",
 819         "write",
 820         NULL
 821 };
 822
 823 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 824 {
 825         int rw, i;
 826
 827         for (rw = 0; rw < 2; rw++) {
 828                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 829
 830                 for (i = 1; i < BCH_DATA_NR; i++)
 831                         prt_printf(out, "%-12s:%12llu\n",
 832                                bch2_data_types[i],
 833                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 834         }
 835 }
 836
 837 SHOW(bch2_dev)
 838 {
 839         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 840         struct bch_fs *c = ca->fs;
 841
 842         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 843
 844         sysfs_print(bucket_size,        bucket_bytes(ca));
 845         sysfs_print(first_bucket,       ca->mi.first_bucket);
 846         sysfs_print(nbuckets,           ca->mi.nbuckets);
 847         sysfs_print(durability,         ca->mi.durability);
 848         sysfs_print(discard,            ca->mi.discard);
 849
 850         if (attr == &sysfs_label) {
 851                 if (ca->mi.group) {
 852                         mutex_lock(&c->sb_lock);
 853                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 854                                                ca->mi.group - 1);
 855                         mutex_unlock(&c->sb_lock);
 856                 }
 857
 858                 prt_char(out, '\n');
 859         }
 860
 861         if (attr == &sysfs_has_data) {
 862                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 863                 prt_char(out, '\n');
 864         }
 865
 866         if (attr == &sysfs_state_rw) {
 867                 prt_string_option(out, bch2_member_states, ca->mi.state);
 868                 prt_char(out, '\n');
 869         }
 870
 871         if (attr == &sysfs_iodone)
 872                 dev_iodone_to_text(out, ca);
 873
 874         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 875         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 876
 877         if (attr == &sysfs_io_latency_stats_read)
 878                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 879
 880         if (attr == &sysfs_io_latency_stats_write)
 881                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 882
 883         sysfs_printf(congested,                 "%u%%",
 884                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 885                      * 100 / CONGESTED_MAX);
 886
 887         if (attr == &sysfs_alloc_debug)
 888                 dev_alloc_debug_to_text(out, ca);
 889
 890         return 0;
 891 }
 892
 893 STORE(bch2_dev)
 894 {
 895         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 896         struct bch_fs *c = ca->fs;
 897         struct bch_member *mi;
 898
 899         if (attr == &sysfs_discard) {
 900                 bool v = strtoul_or_return(buf);
 901
 902                 mutex_lock(&c->sb_lock);
 903                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 904
 905                 if (v != BCH_MEMBER_DISCARD(mi)) {
 906                         SET_BCH_MEMBER_DISCARD(mi, v);
 907                         bch2_write_super(c);
 908                 }
 909                 mutex_unlock(&c->sb_lock);
 910         }
 911
 912         if (attr == &sysfs_durability) {
 913                 u64 v = strtoul_or_return(buf);
 914
 915                 mutex_lock(&c->sb_lock);
 916                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 917
 918                 if (v != BCH_MEMBER_DURABILITY(mi)) {
 919                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 920                         bch2_write_super(c);
 921                 }
 922                 mutex_unlock(&c->sb_lock);
 923         }
 924
 925         if (attr == &sysfs_label) {
 926                 char *tmp;
 927                 int ret;
 928
 929                 tmp = kstrdup(buf, GFP_KERNEL);
 930                 if (!tmp)
 931                         return -ENOMEM;
 932
 933                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 934                 kfree(tmp);
 935                 if (ret)
 936                         return ret;
 937         }
 938
 939         return size;
 940 }
 941 SYSFS_OPS(bch2_dev);
 942
 943 struct attribute *bch2_dev_files[] = {
 944         &sysfs_uuid,
 945         &sysfs_bucket_size,
 946         &sysfs_first_bucket,
 947         &sysfs_nbuckets,
 948         &sysfs_durability,
 949
 950         /* settings: */
 951         &sysfs_discard,
 952         &sysfs_state_rw,
 953         &sysfs_label,
 954
 955         &sysfs_has_data,
 956         &sysfs_iodone,
 957
 958         &sysfs_io_latency_read,
 959         &sysfs_io_latency_write,
 960         &sysfs_io_latency_stats_read,
 961         &sysfs_io_latency_stats_write,
 962         &sysfs_congested,
 963
 964         /* debug: */
 965         &sysfs_alloc_debug,
 966         NULL
 967 };
 968
 969 #endif  /* _BCACHEFS_SYSFS_H_ */