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(prune_cache);
 154 rw_attribute(btree_gc_periodic);
 155 rw_attribute(gc_gens_pos);
 156
 157 read_attribute(uuid);
 158 read_attribute(minor);
 159 read_attribute(bucket_size);
 160 read_attribute(first_bucket);
 161 read_attribute(nbuckets);
 162 read_attribute(durability);
 163 read_attribute(iodone);
 164
 165 read_attribute(io_latency_read);
 166 read_attribute(io_latency_write);
 167 read_attribute(io_latency_stats_read);
 168 read_attribute(io_latency_stats_write);
 169 read_attribute(congested);
 170
 171 read_attribute(btree_avg_write_size);
 172
 173 read_attribute(reserve_stats);
 174 read_attribute(btree_cache_size);
 175 read_attribute(compression_stats);
 176 read_attribute(journal_debug);
 177 read_attribute(journal_pins);
 178 read_attribute(btree_updates);
 179 read_attribute(dirty_btree_nodes);
 180 read_attribute(btree_cache);
 181 read_attribute(btree_key_cache);
 182 read_attribute(btree_transactions);
 183 read_attribute(stripes_heap);
 184 read_attribute(open_buckets);
 185
 186 read_attribute(internal_uuid);
 187
 188 read_attribute(has_data);
 189 read_attribute(alloc_debug);
 190 write_attribute(wake_allocator);
 191
 192 read_attribute(read_realloc_races);
 193 read_attribute(extent_migrate_done);
 194 read_attribute(extent_migrate_raced);
 195
 196 rw_attribute(discard);
 197 rw_attribute(label);
 198
 199 rw_attribute(copy_gc_enabled);
 200 read_attribute(copy_gc_wait);
 201
 202 rw_attribute(rebalance_enabled);
 203 sysfs_pd_controller_attribute(rebalance);
 204 read_attribute(rebalance_work);
 205 rw_attribute(promote_whole_extents);
 206
 207 read_attribute(new_stripes);
 208
 209 read_attribute(io_timers_read);
 210 read_attribute(io_timers_write);
 211
 212 read_attribute(data_jobs);
 213
 214 #ifdef CONFIG_BCACHEFS_TESTS
 215 write_attribute(perf_test);
 216 #endif /* CONFIG_BCACHEFS_TESTS */
 217
 218 #define x(_name)                                                \
 219         static struct attribute sysfs_time_stat_##_name =               \
 220                 { .name = #_name, .mode = S_IRUGO };
 221         BCH_TIME_STATS()
 222 #undef x
 223
 224 static struct attribute sysfs_state_rw = {
 225         .name = "state",
 226         .mode = S_IRUGO
 227 };
 228
 229 static size_t bch2_btree_cache_size(struct bch_fs *c)
 230 {
 231         size_t ret = 0;
 232         struct btree *b;
 233
 234         mutex_lock(&c->btree_cache.lock);
 235         list_for_each_entry(b, &c->btree_cache.live, list)
 236                 ret += btree_bytes(c);
 237
 238         mutex_unlock(&c->btree_cache.lock);
 239         return ret;
 240 }
 241
 242 static size_t bch2_btree_avg_write_size(struct bch_fs *c)
 243 {
 244         u64 nr = atomic64_read(&c->btree_writes_nr);
 245         u64 sectors = atomic64_read(&c->btree_writes_sectors);
 246
 247         return nr ? div64_u64(sectors, nr) : 0;
 248 }
 249
 250 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 251 {
 252         long ret = 0;
 253         struct bch_move_stats *stats;
 254
 255         mutex_lock(&c->data_progress_lock);
 256         list_for_each_entry(stats, &c->data_progress_list, list) {
 257                 pr_buf(out, "%s: data type %s btree_id %s position: ",
 258                        stats->name,
 259                        bch2_data_types[stats->data_type],
 260                        bch2_btree_ids[stats->btree_id]);
 261                 bch2_bpos_to_text(out, stats->pos);
 262                 pr_buf(out, "%s", "\n");
 263         }
 264
 265         mutex_unlock(&c->data_progress_lock);
 266         return ret;
 267 }
 268
 269 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 270 {
 271         struct btree_trans trans;
 272         struct btree_iter iter;
 273         struct bkey_s_c k;
 274         enum btree_id id;
 275         u64 nr_uncompressed_extents = 0,
 276             nr_compressed_extents = 0,
 277             nr_incompressible_extents = 0,
 278             uncompressed_sectors = 0,
 279             incompressible_sectors = 0,
 280             compressed_sectors_compressed = 0,
 281             compressed_sectors_uncompressed = 0;
 282         int ret;
 283
 284         if (!test_bit(BCH_FS_STARTED, &c->flags))
 285                 return -EPERM;
 286
 287         bch2_trans_init(&trans, c, 0, 0);
 288
 289         for (id = 0; id < BTREE_ID_NR; id++) {
 290                 if (!((1U << id) & BTREE_ID_HAS_PTRS))
 291                         continue;
 292
 293                 for_each_btree_key(&trans, iter, id, POS_MIN,
 294                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 295                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 296                         const union bch_extent_entry *entry;
 297                         struct extent_ptr_decoded p;
 298                         bool compressed = false, uncompressed = false, incompressible = false;
 299
 300                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 301                                 switch (p.crc.compression_type) {
 302                                 case BCH_COMPRESSION_TYPE_none:
 303                                         uncompressed = true;
 304                                         uncompressed_sectors += k.k->size;
 305                                         break;
 306                                 case BCH_COMPRESSION_TYPE_incompressible:
 307                                         incompressible = true;
 308                                         incompressible_sectors += k.k->size;
 309                                         break;
 310                                 default:
 311                                         compressed_sectors_compressed +=
 312                                                 p.crc.compressed_size;
 313                                         compressed_sectors_uncompressed +=
 314                                                 p.crc.uncompressed_size;
 315                                         compressed = true;
 316                                         break;
 317                                 }
 318                         }
 319
 320                         if (incompressible)
 321                                 nr_incompressible_extents++;
 322                         else if (uncompressed)
 323                                 nr_uncompressed_extents++;
 324                         else if (compressed)
 325                                 nr_compressed_extents++;
 326                 }
 327                 bch2_trans_iter_exit(&trans, &iter);
 328         }
 329
 330         bch2_trans_exit(&trans);
 331
 332         if (ret)
 333                 return ret;
 334
 335         pr_buf(out, "uncompressed:\n");
 336         pr_buf(out, "   nr extents:             %llu\n", nr_uncompressed_extents);
 337         pr_buf(out, "   size:                   ");
 338         bch2_hprint(out, uncompressed_sectors << 9);
 339         pr_buf(out, "\n");
 340
 341         pr_buf(out, "compressed:\n");
 342         pr_buf(out, "   nr extents:             %llu\n", nr_compressed_extents);
 343         pr_buf(out, "   compressed size:        ");
 344         bch2_hprint(out, compressed_sectors_compressed << 9);
 345         pr_buf(out, "\n");
 346         pr_buf(out, "   uncompressed size:      ");
 347         bch2_hprint(out, compressed_sectors_uncompressed << 9);
 348         pr_buf(out, "\n");
 349
 350         pr_buf(out, "incompressible:\n");
 351         pr_buf(out, "   nr extents:             %llu\n", nr_incompressible_extents);
 352         pr_buf(out, "   size:                   ");
 353         bch2_hprint(out, incompressible_sectors << 9);
 354         pr_buf(out, "\n");
 355         return 0;
 356 }
 357
 358 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 359 {
 360         pr_buf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 361         bch2_bpos_to_text(out, c->gc_gens_pos);
 362         pr_buf(out, "\n");
 363 }
 364
 365 SHOW(bch2_fs)
 366 {
 367         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 368
 369         sysfs_print(minor,                      c->minor);
 370         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 371
 372         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 373         sysfs_hprint(btree_avg_write_size,      bch2_btree_avg_write_size(c));
 374
 375         sysfs_print(read_realloc_races,
 376                     atomic_long_read(&c->read_realloc_races));
 377         sysfs_print(extent_migrate_done,
 378                     atomic_long_read(&c->extent_migrate_done));
 379         sysfs_print(extent_migrate_raced,
 380                     atomic_long_read(&c->extent_migrate_raced));
 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_journal_pins)
 406                 bch2_journal_pins_to_text(out, &c->journal);
 407
 408         if (attr == &sysfs_btree_updates)
 409                 bch2_btree_updates_to_text(out, c);
 410
 411         if (attr == &sysfs_dirty_btree_nodes)
 412                 bch2_dirty_btree_nodes_to_text(out, c);
 413
 414         if (attr == &sysfs_btree_cache)
 415                 bch2_btree_cache_to_text(out, c);
 416
 417         if (attr == &sysfs_btree_key_cache)
 418                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 419
 420         if (attr == &sysfs_btree_transactions)
 421                 bch2_btree_trans_to_text(out, c);
 422
 423         if (attr == &sysfs_stripes_heap)
 424                 bch2_stripes_heap_to_text(out, c);
 425
 426         if (attr == &sysfs_open_buckets)
 427                 bch2_open_buckets_to_text(out, c);
 428
 429         if (attr == &sysfs_compression_stats)
 430                 bch2_compression_stats_to_text(out, c);
 431
 432         if (attr == &sysfs_new_stripes)
 433                 bch2_new_stripes_to_text(out, c);
 434
 435         if (attr == &sysfs_io_timers_read)
 436                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 437
 438         if (attr == &sysfs_io_timers_write)
 439                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 440
 441         if (attr == &sysfs_data_jobs)
 442                 data_progress_to_text(out, c);
 443
 444         return 0;
 445 }
 446
 447 STORE(bch2_fs)
 448 {
 449         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 450
 451         if (attr == &sysfs_btree_gc_periodic) {
 452                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 453                         ?: (ssize_t) size;
 454
 455                 wake_up_process(c->gc_thread);
 456                 return ret;
 457         }
 458
 459         if (attr == &sysfs_copy_gc_enabled) {
 460                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 461                         ?: (ssize_t) size;
 462
 463                 if (c->copygc_thread)
 464                         wake_up_process(c->copygc_thread);
 465                 return ret;
 466         }
 467
 468         if (attr == &sysfs_rebalance_enabled) {
 469                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 470                         ?: (ssize_t) size;
 471
 472                 rebalance_wakeup(c);
 473                 return ret;
 474         }
 475
 476         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 477
 478         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 479
 480         /* Debugging: */
 481
 482         if (!test_bit(BCH_FS_STARTED, &c->flags))
 483                 return -EPERM;
 484
 485         /* Debugging: */
 486
 487         if (!test_bit(BCH_FS_RW, &c->flags))
 488                 return -EROFS;
 489
 490         if (attr == &sysfs_prune_cache) {
 491                 struct shrink_control sc;
 492
 493                 sc.gfp_mask = GFP_KERNEL;
 494                 sc.nr_to_scan = strtoul_or_return(buf);
 495                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 496         }
 497
 498         if (attr == &sysfs_trigger_gc) {
 499                 /*
 500                  * Full gc is currently incompatible with btree key cache:
 501                  */
 502 #if 0
 503                 down_read(&c->state_lock);
 504                 bch2_gc(c, false, false);
 505                 up_read(&c->state_lock);
 506 #else
 507                 bch2_gc_gens(c);
 508 #endif
 509         }
 510
 511 #ifdef CONFIG_BCACHEFS_TESTS
 512         if (attr == &sysfs_perf_test) {
 513                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 514                 char *test              = strsep(&p, " \t\n");
 515                 char *nr_str            = strsep(&p, " \t\n");
 516                 char *threads_str       = strsep(&p, " \t\n");
 517                 unsigned threads;
 518                 u64 nr;
 519                 int ret = -EINVAL;
 520
 521                 if (threads_str &&
 522                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 523                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 524                         ret = bch2_btree_perf_test(c, test, nr, threads);
 525                 kfree(tmp);
 526
 527                 if (ret)
 528                         size = ret;
 529         }
 530 #endif
 531         return size;
 532 }
 533 SYSFS_OPS(bch2_fs);
 534
 535 struct attribute *bch2_fs_files[] = {
 536         &sysfs_minor,
 537         &sysfs_btree_cache_size,
 538         &sysfs_btree_avg_write_size,
 539
 540         &sysfs_promote_whole_extents,
 541
 542         &sysfs_compression_stats,
 543
 544 #ifdef CONFIG_BCACHEFS_TESTS
 545         &sysfs_perf_test,
 546 #endif
 547         NULL
 548 };
 549
 550 /* internal dir - just a wrapper */
 551
 552 SHOW(bch2_fs_internal)
 553 {
 554         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 555         return bch2_fs_to_text(out, &c->kobj, attr);
 556 }
 557
 558 STORE(bch2_fs_internal)
 559 {
 560         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 561         return bch2_fs_store(&c->kobj, attr, buf, size);
 562 }
 563 SYSFS_OPS(bch2_fs_internal);
 564
 565 struct attribute *bch2_fs_internal_files[] = {
 566         &sysfs_journal_debug,
 567         &sysfs_journal_pins,
 568         &sysfs_btree_updates,
 569         &sysfs_dirty_btree_nodes,
 570         &sysfs_btree_cache,
 571         &sysfs_btree_key_cache,
 572         &sysfs_btree_transactions,
 573         &sysfs_new_stripes,
 574         &sysfs_stripes_heap,
 575         &sysfs_open_buckets,
 576         &sysfs_io_timers_read,
 577         &sysfs_io_timers_write,
 578
 579         &sysfs_trigger_gc,
 580         &sysfs_prune_cache,
 581
 582         &sysfs_read_realloc_races,
 583         &sysfs_extent_migrate_done,
 584         &sysfs_extent_migrate_raced,
 585
 586         &sysfs_gc_gens_pos,
 587
 588         &sysfs_copy_gc_enabled,
 589         &sysfs_copy_gc_wait,
 590
 591         &sysfs_rebalance_enabled,
 592         &sysfs_rebalance_work,
 593         sysfs_pd_controller_files(rebalance),
 594
 595         &sysfs_data_jobs,
 596
 597         &sysfs_internal_uuid,
 598         NULL
 599 };
 600
 601 /* options */
 602
 603 SHOW(bch2_fs_opts_dir)
 604 {
 605         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 606         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 607         int id = opt - bch2_opt_table;
 608         u64 v = bch2_opt_get_by_id(&c->opts, id);
 609
 610         bch2_opt_to_text(out, c, opt, v, OPT_SHOW_FULL_LIST);
 611         pr_char(out, '\n');
 612
 613         return 0;
 614 }
 615
 616 STORE(bch2_fs_opts_dir)
 617 {
 618         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 619         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 620         int ret, id = opt - bch2_opt_table;
 621         char *tmp;
 622         u64 v;
 623
 624         tmp = kstrdup(buf, GFP_KERNEL);
 625         if (!tmp)
 626                 return -ENOMEM;
 627
 628         ret = bch2_opt_parse(c, NULL, opt, strim(tmp), &v);
 629         kfree(tmp);
 630
 631         if (ret < 0)
 632                 return ret;
 633
 634         ret = bch2_opt_check_may_set(c, id, v);
 635         if (ret < 0)
 636                 return ret;
 637
 638         bch2_opt_set_sb(c, opt, v);
 639         bch2_opt_set_by_id(&c->opts, id, v);
 640
 641         if ((id == Opt_background_target ||
 642              id == Opt_background_compression) && v) {
 643                 bch2_rebalance_add_work(c, S64_MAX);
 644                 rebalance_wakeup(c);
 645         }
 646
 647         return size;
 648 }
 649 SYSFS_OPS(bch2_fs_opts_dir);
 650
 651 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 652
 653 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 654 {
 655         const struct bch_option *i;
 656         int ret;
 657
 658         for (i = bch2_opt_table;
 659              i < bch2_opt_table + bch2_opts_nr;
 660              i++) {
 661                 if (!(i->flags & OPT_FS))
 662                         continue;
 663
 664                 ret = sysfs_create_file(kobj, &i->attr);
 665                 if (ret)
 666                         return ret;
 667         }
 668
 669         return 0;
 670 }
 671
 672 /* time stats */
 673
 674 SHOW(bch2_fs_time_stats)
 675 {
 676         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 677
 678 #define x(name)                                                         \
 679         if (attr == &sysfs_time_stat_##name)                            \
 680                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 681         BCH_TIME_STATS()
 682 #undef x
 683
 684         return 0;
 685 }
 686
 687 STORE(bch2_fs_time_stats)
 688 {
 689         return size;
 690 }
 691 SYSFS_OPS(bch2_fs_time_stats);
 692
 693 struct attribute *bch2_fs_time_stats_files[] = {
 694 #define x(name)                                         \
 695         &sysfs_time_stat_##name,
 696         BCH_TIME_STATS()
 697 #undef x
 698         NULL
 699 };
 700
 701 static void reserve_stats_to_text(struct printbuf *out, struct bch_dev *ca)
 702 {
 703         enum alloc_reserve i;
 704
 705         spin_lock(&ca->fs->freelist_lock);
 706
 707         pr_buf(out, "free_inc:\t%zu\t%zu\n",
 708                fifo_used(&ca->free_inc),
 709                ca->free_inc.size);
 710
 711         for (i = 0; i < RESERVE_NR; i++)
 712                 pr_buf(out, "free[%u]:\t%zu\t%zu\n", i,
 713                        fifo_used(&ca->free[i]),
 714                        ca->free[i].size);
 715
 716         spin_unlock(&ca->fs->freelist_lock);
 717 }
 718
 719 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 720 {
 721         struct bch_fs *c = ca->fs;
 722         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 723         unsigned i, nr[BCH_DATA_NR];
 724
 725         memset(nr, 0, sizeof(nr));
 726
 727         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 728                 nr[c->open_buckets[i].data_type]++;
 729
 730         pr_buf(out,
 731                "\t\t buckets\t sectors      fragmented\n"
 732                "capacity%16llu\n",
 733                ca->mi.nbuckets - ca->mi.first_bucket);
 734
 735         for (i = 1; i < BCH_DATA_NR; i++)
 736                 pr_buf(out, "%-8s%16llu%16llu%16llu\n",
 737                        bch2_data_types[i], stats.d[i].buckets,
 738                        stats.d[i].sectors, stats.d[i].fragmented);
 739
 740         pr_buf(out,
 741                "ec\t%16llu\n"
 742                "available%15llu\n"
 743                "\n"
 744                "free_inc\t\t%zu/%zu\n"
 745                "free[RESERVE_MOVINGGC]\t%zu/%zu\n"
 746                "free[RESERVE_NONE]\t%zu/%zu\n"
 747                "freelist_wait\t\t%s\n"
 748                "open buckets allocated\t%u\n"
 749                "open buckets this dev\t%u\n"
 750                "open buckets total\t%u\n"
 751                "open_buckets_wait\t%s\n"
 752                "open_buckets_btree\t%u\n"
 753                "open_buckets_user\t%u\n"
 754                "btree reserve cache\t%u\n"
 755                "thread state:\t\t%s\n",
 756                stats.buckets_ec,
 757                __dev_buckets_available(ca, stats),
 758                fifo_used(&ca->free_inc),                ca->free_inc.size,
 759                fifo_used(&ca->free[RESERVE_MOVINGGC]),  ca->free[RESERVE_MOVINGGC].size,
 760                fifo_used(&ca->free[RESERVE_NONE]),      ca->free[RESERVE_NONE].size,
 761                c->freelist_wait.list.first              ? "waiting" : "empty",
 762                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 763                ca->nr_open_buckets,
 764                OPEN_BUCKETS_COUNT,
 765                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 766                nr[BCH_DATA_btree],
 767                nr[BCH_DATA_user],
 768                c->btree_reserve_cache_nr,
 769                bch2_allocator_states[ca->allocator_state]);
 770 }
 771
 772 static const char * const bch2_rw[] = {
 773         "read",
 774         "write",
 775         NULL
 776 };
 777
 778 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 779 {
 780         int rw, i;
 781
 782         for (rw = 0; rw < 2; rw++) {
 783                 pr_buf(out, "%s:\n", bch2_rw[rw]);
 784
 785                 for (i = 1; i < BCH_DATA_NR; i++)
 786                         pr_buf(out, "%-12s:%12llu\n",
 787                                bch2_data_types[i],
 788                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 789         }
 790 }
 791
 792 SHOW(bch2_dev)
 793 {
 794         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 795         struct bch_fs *c = ca->fs;
 796
 797         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 798
 799         sysfs_print(bucket_size,        bucket_bytes(ca));
 800         sysfs_print(first_bucket,       ca->mi.first_bucket);
 801         sysfs_print(nbuckets,           ca->mi.nbuckets);
 802         sysfs_print(durability,         ca->mi.durability);
 803         sysfs_print(discard,            ca->mi.discard);
 804
 805         if (attr == &sysfs_label) {
 806                 if (ca->mi.group) {
 807                         mutex_lock(&c->sb_lock);
 808                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 809                                                ca->mi.group - 1);
 810                         mutex_unlock(&c->sb_lock);
 811                 }
 812
 813                 pr_char(out, '\n');
 814         }
 815
 816         if (attr == &sysfs_has_data) {
 817                 bch2_flags_to_text(out, bch2_data_types,
 818                                    bch2_dev_has_data(c, ca));
 819                 pr_char(out, '\n');
 820         }
 821
 822         if (attr == &sysfs_state_rw) {
 823                 bch2_string_opt_to_text(out, bch2_member_states,
 824                                         ca->mi.state);
 825                 pr_char(out, '\n');
 826         }
 827
 828         if (attr == &sysfs_iodone)
 829                 dev_iodone_to_text(out, ca);
 830
 831         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 832         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 833
 834         if (attr == &sysfs_io_latency_stats_read)
 835                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 836
 837         if (attr == &sysfs_io_latency_stats_write)
 838                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 839
 840         sysfs_printf(congested,                 "%u%%",
 841                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 842                      * 100 / CONGESTED_MAX);
 843
 844         if (attr == &sysfs_reserve_stats)
 845                 reserve_stats_to_text(out, ca);
 846
 847         if (attr == &sysfs_alloc_debug)
 848                 dev_alloc_debug_to_text(out, ca);
 849
 850         return 0;
 851 }
 852
 853 STORE(bch2_dev)
 854 {
 855         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 856         struct bch_fs *c = ca->fs;
 857         struct bch_member *mi;
 858
 859         if (attr == &sysfs_discard) {
 860                 bool v = strtoul_or_return(buf);
 861
 862                 mutex_lock(&c->sb_lock);
 863                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 864
 865                 if (v != BCH_MEMBER_DISCARD(mi)) {
 866                         SET_BCH_MEMBER_DISCARD(mi, v);
 867                         bch2_write_super(c);
 868                 }
 869                 mutex_unlock(&c->sb_lock);
 870         }
 871
 872         if (attr == &sysfs_label) {
 873                 char *tmp;
 874                 int ret;
 875
 876                 tmp = kstrdup(buf, GFP_KERNEL);
 877                 if (!tmp)
 878                         return -ENOMEM;
 879
 880                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 881                 kfree(tmp);
 882                 if (ret)
 883                         return ret;
 884         }
 885
 886         if (attr == &sysfs_wake_allocator)
 887                 bch2_wake_allocator(ca);
 888
 889         return size;
 890 }
 891 SYSFS_OPS(bch2_dev);
 892
 893 struct attribute *bch2_dev_files[] = {
 894         &sysfs_uuid,
 895         &sysfs_bucket_size,
 896         &sysfs_first_bucket,
 897         &sysfs_nbuckets,
 898         &sysfs_durability,
 899
 900         /* settings: */
 901         &sysfs_discard,
 902         &sysfs_state_rw,
 903         &sysfs_label,
 904
 905         &sysfs_has_data,
 906         &sysfs_iodone,
 907
 908         &sysfs_io_latency_read,
 909         &sysfs_io_latency_write,
 910         &sysfs_io_latency_stats_read,
 911         &sysfs_io_latency_stats_write,
 912         &sysfs_congested,
 913
 914         &sysfs_reserve_stats,
 915
 916         /* debug: */
 917         &sysfs_alloc_debug,
 918         &sysfs_wake_allocator,
 919         NULL
 920 };
 921
 922 #endif  /* _BCACHEFS_SYSFS_H_ */