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/sort.h>
  39 #include <linux/sched/clock.h>
  40
  41 #include "util.h"
  42
  43 #define SYSFS_OPS(type)                                                 \
  44 const struct sysfs_ops type ## _sysfs_ops = {                           \
  45         .show   = type ## _show,                                        \
  46         .store  = type ## _store                                        \
  47 }
  48
  49 #define SHOW(fn)                                                        \
  50 static ssize_t fn ## _to_text(struct printbuf *,                        \
  51                               struct kobject *, struct attribute *);    \
  52                                                                         \
  53 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  54                            char *buf)                                   \
  55 {                                                                       \
  56         struct printbuf out = PRINTBUF;                                 \
  57         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  58                                                                         \
  59         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  60                 prt_newline(&out);                                      \
  61                                                                         \
  62         if (!ret && out.allocation_failure)                             \
  63                 ret = -ENOMEM;                                          \
  64                                                                         \
  65         if (!ret) {                                                     \
  66                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  67                 memcpy(buf, out.buf, ret);                              \
  68         }                                                               \
  69         printbuf_exit(&out);                                            \
  70         return bch2_err_class(ret);                                     \
  71 }                                                                       \
  72                                                                         \
  73 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  74                               struct attribute *attr)
  75
  76 #define STORE(fn)                                                       \
  77 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
  78                             const char *, size_t);                      \
  79                                                                         \
  80 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  81                             const char *buf, size_t size)               \
  82 {                                                                       \
  83         return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
  84 }                                                                       \
  85                                                                         \
  86 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
  87                                   const char *buf, size_t size)
  88
  89 #define __sysfs_attribute(_name, _mode)                                 \
  90         static struct attribute sysfs_##_name =                         \
  91                 { .name = #_name, .mode = _mode }
  92
  93 #define write_attribute(n)      __sysfs_attribute(n, 0200)
  94 #define read_attribute(n)       __sysfs_attribute(n, 0444)
  95 #define rw_attribute(n)         __sysfs_attribute(n, 0644)
  96
  97 #define sysfs_printf(file, fmt, ...)                                    \
  98 do {                                                                    \
  99         if (attr == &sysfs_ ## file)                                    \
 100                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
 101 } while (0)
 102
 103 #define sysfs_print(file, var)                                          \
 104 do {                                                                    \
 105         if (attr == &sysfs_ ## file)                                    \
 106                 snprint(out, var);                                      \
 107 } while (0)
 108
 109 #define sysfs_hprint(file, val)                                         \
 110 do {                                                                    \
 111         if (attr == &sysfs_ ## file)                                    \
 112                 prt_human_readable_s64(out, val);                       \
 113 } while (0)
 114
 115 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 116 #define var_print(_var)         sysfs_print(_var, var(_var))
 117 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 118
 119 #define sysfs_strtoul(file, var)                                        \
 120 do {                                                                    \
 121         if (attr == &sysfs_ ## file)                                    \
 122                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 123 } while (0)
 124
 125 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 126 do {                                                                    \
 127         if (attr == &sysfs_ ## file)                                    \
 128                 return strtoul_safe_clamp(buf, var, min, max)           \
 129                         ?: (ssize_t) size;                              \
 130 } while (0)
 131
 132 #define strtoul_or_return(cp)                                           \
 133 ({                                                                      \
 134         unsigned long _v;                                               \
 135         int _r = kstrtoul(cp, 10, &_v);                                 \
 136         if (_r)                                                         \
 137                 return _r;                                              \
 138         _v;                                                             \
 139 })
 140
 141 #define strtoul_restrict_or_return(cp, min, max)                        \
 142 ({                                                                      \
 143         unsigned long __v = 0;                                          \
 144         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 145         if (_r)                                                         \
 146                 return _r;                                              \
 147         __v;                                                            \
 148 })
 149
 150 #define strtoi_h_or_return(cp)                                          \
 151 ({                                                                      \
 152         u64 _v;                                                         \
 153         int _r = strtoi_h(cp, &_v);                                     \
 154         if (_r)                                                         \
 155                 return _r;                                              \
 156         _v;                                                             \
 157 })
 158
 159 #define sysfs_hatoi(file, var)                                          \
 160 do {                                                                    \
 161         if (attr == &sysfs_ ## file)                                    \
 162                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 163 } while (0)
 164
 165 write_attribute(trigger_gc);
 166 write_attribute(trigger_discards);
 167 write_attribute(trigger_invalidates);
 168 write_attribute(prune_cache);
 169 write_attribute(btree_wakeup);
 170 rw_attribute(btree_gc_periodic);
 171 rw_attribute(gc_gens_pos);
 172
 173 read_attribute(uuid);
 174 read_attribute(minor);
 175 read_attribute(bucket_size);
 176 read_attribute(first_bucket);
 177 read_attribute(nbuckets);
 178 rw_attribute(durability);
 179 read_attribute(iodone);
 180
 181 read_attribute(io_latency_read);
 182 read_attribute(io_latency_write);
 183 read_attribute(io_latency_stats_read);
 184 read_attribute(io_latency_stats_write);
 185 read_attribute(congested);
 186
 187 read_attribute(btree_write_stats);
 188
 189 read_attribute(btree_cache_size);
 190 read_attribute(compression_stats);
 191 read_attribute(journal_debug);
 192 read_attribute(btree_updates);
 193 read_attribute(btree_cache);
 194 read_attribute(btree_key_cache);
 195 read_attribute(stripes_heap);
 196 read_attribute(open_buckets);
 197 read_attribute(write_points);
 198 read_attribute(nocow_lock_table);
 199
 200 #ifdef BCH_WRITE_REF_DEBUG
 201 read_attribute(write_refs);
 202
 203 const char * const bch2_write_refs[] = {
 204 #define x(n)    #n,
 205         BCH_WRITE_REFS()
 206 #undef x
 207         NULL
 208 };
 209
 210 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 211 {
 212         bch2_printbuf_tabstop_push(out, 24);
 213
 214         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 215                 prt_str(out, bch2_write_refs[i]);
 216                 prt_tab(out);
 217                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 218                 prt_newline(out);
 219         }
 220 }
 221 #endif
 222
 223 read_attribute(internal_uuid);
 224
 225 read_attribute(has_data);
 226 read_attribute(alloc_debug);
 227
 228 #define x(t, n, ...) read_attribute(t);
 229 BCH_PERSISTENT_COUNTERS()
 230 #undef x
 231
 232 rw_attribute(discard);
 233 rw_attribute(label);
 234
 235 rw_attribute(copy_gc_enabled);
 236 read_attribute(copy_gc_wait);
 237
 238 rw_attribute(rebalance_enabled);
 239 sysfs_pd_controller_attribute(rebalance);
 240 read_attribute(rebalance_work);
 241 rw_attribute(promote_whole_extents);
 242
 243 read_attribute(new_stripes);
 244
 245 read_attribute(io_timers_read);
 246 read_attribute(io_timers_write);
 247
 248 read_attribute(data_jobs);
 249
 250 #ifdef CONFIG_BCACHEFS_TESTS
 251 write_attribute(perf_test);
 252 #endif /* CONFIG_BCACHEFS_TESTS */
 253
 254 #define x(_name)                                                \
 255         static struct attribute sysfs_time_stat_##_name =               \
 256                 { .name = #_name, .mode = 0444 };
 257         BCH_TIME_STATS()
 258 #undef x
 259
 260 static struct attribute sysfs_state_rw = {
 261         .name = "state",
 262         .mode =  0444,
 263 };
 264
 265 static size_t bch2_btree_cache_size(struct bch_fs *c)
 266 {
 267         size_t ret = 0;
 268         struct btree *b;
 269
 270         mutex_lock(&c->btree_cache.lock);
 271         list_for_each_entry(b, &c->btree_cache.live, list)
 272                 ret += btree_bytes(c);
 273
 274         mutex_unlock(&c->btree_cache.lock);
 275         return ret;
 276 }
 277
 278 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 279 {
 280         long ret = 0;
 281         struct bch_move_stats *stats;
 282
 283         mutex_lock(&c->data_progress_lock);
 284         list_for_each_entry(stats, &c->data_progress_list, list) {
 285                 prt_printf(out, "%s: data type %s btree_id %s position: ",
 286                        stats->name,
 287                        bch2_data_types[stats->data_type],
 288                        bch2_btree_ids[stats->btree_id]);
 289                 bch2_bpos_to_text(out, stats->pos);
 290                 prt_printf(out, "%s", "\n");
 291         }
 292
 293         mutex_unlock(&c->data_progress_lock);
 294         return ret;
 295 }
 296
 297 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 298 {
 299         struct btree_trans trans;
 300         struct btree_iter iter;
 301         struct bkey_s_c k;
 302         enum btree_id id;
 303         u64 nr_uncompressed_extents = 0,
 304             nr_compressed_extents = 0,
 305             nr_incompressible_extents = 0,
 306             uncompressed_sectors = 0,
 307             incompressible_sectors = 0,
 308             compressed_sectors_compressed = 0,
 309             compressed_sectors_uncompressed = 0;
 310         int ret;
 311
 312         if (!test_bit(BCH_FS_STARTED, &c->flags))
 313                 return -EPERM;
 314
 315         bch2_trans_init(&trans, c, 0, 0);
 316
 317         for (id = 0; id < BTREE_ID_NR; id++) {
 318                 if (!btree_type_has_ptrs(id))
 319                         continue;
 320
 321                 for_each_btree_key(&trans, iter, id, POS_MIN,
 322                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 323                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 324                         const union bch_extent_entry *entry;
 325                         struct extent_ptr_decoded p;
 326                         bool compressed = false, uncompressed = false, incompressible = false;
 327
 328                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 329                                 switch (p.crc.compression_type) {
 330                                 case BCH_COMPRESSION_TYPE_none:
 331                                         uncompressed = true;
 332                                         uncompressed_sectors += k.k->size;
 333                                         break;
 334                                 case BCH_COMPRESSION_TYPE_incompressible:
 335                                         incompressible = true;
 336                                         incompressible_sectors += k.k->size;
 337                                         break;
 338                                 default:
 339                                         compressed_sectors_compressed +=
 340                                                 p.crc.compressed_size;
 341                                         compressed_sectors_uncompressed +=
 342                                                 p.crc.uncompressed_size;
 343                                         compressed = true;
 344                                         break;
 345                                 }
 346                         }
 347
 348                         if (incompressible)
 349                                 nr_incompressible_extents++;
 350                         else if (uncompressed)
 351                                 nr_uncompressed_extents++;
 352                         else if (compressed)
 353                                 nr_compressed_extents++;
 354                 }
 355                 bch2_trans_iter_exit(&trans, &iter);
 356         }
 357
 358         bch2_trans_exit(&trans);
 359
 360         if (ret)
 361                 return ret;
 362
 363         prt_printf(out, "uncompressed:\n");
 364         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 365         prt_printf(out, "       size:                   ");
 366         prt_human_readable_u64(out, uncompressed_sectors << 9);
 367         prt_printf(out, "\n");
 368
 369         prt_printf(out, "compressed:\n");
 370         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 371         prt_printf(out, "       compressed size:        ");
 372         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 373         prt_printf(out, "\n");
 374         prt_printf(out, "       uncompressed size:      ");
 375         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 376         prt_printf(out, "\n");
 377
 378         prt_printf(out, "incompressible:\n");
 379         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 380         prt_printf(out, "       size:                   ");
 381         prt_human_readable_u64(out, incompressible_sectors << 9);
 382         prt_printf(out, "\n");
 383         return 0;
 384 }
 385
 386 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 387 {
 388         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 389         bch2_bpos_to_text(out, c->gc_gens_pos);
 390         prt_printf(out, "\n");
 391 }
 392
 393 static void bch2_btree_wakeup_all(struct bch_fs *c)
 394 {
 395         struct btree_trans *trans;
 396
 397         mutex_lock(&c->btree_trans_lock);
 398         list_for_each_entry(trans, &c->btree_trans_list, list) {
 399                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 400
 401                 if (b)
 402                         six_lock_wakeup_all(&b->lock);
 403
 404         }
 405         mutex_unlock(&c->btree_trans_lock);
 406 }
 407
 408 SHOW(bch2_fs)
 409 {
 410         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 411
 412         sysfs_print(minor,                      c->minor);
 413         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 414
 415         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 416
 417         if (attr == &sysfs_btree_write_stats)
 418                 bch2_btree_write_stats_to_text(out, c);
 419
 420         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 421
 422         if (attr == &sysfs_gc_gens_pos)
 423                 bch2_gc_gens_pos_to_text(out, c);
 424
 425         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 426
 427         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 428         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 429         sysfs_hprint(copy_gc_wait,
 430                      max(0LL, c->copygc_wait -
 431                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 432
 433         if (attr == &sysfs_rebalance_work)
 434                 bch2_rebalance_work_to_text(out, c);
 435
 436         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 437
 438         /* Debugging: */
 439
 440         if (attr == &sysfs_journal_debug)
 441                 bch2_journal_debug_to_text(out, &c->journal);
 442
 443         if (attr == &sysfs_btree_updates)
 444                 bch2_btree_updates_to_text(out, c);
 445
 446         if (attr == &sysfs_btree_cache)
 447                 bch2_btree_cache_to_text(out, &c->btree_cache);
 448
 449         if (attr == &sysfs_btree_key_cache)
 450                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 451
 452         if (attr == &sysfs_stripes_heap)
 453                 bch2_stripes_heap_to_text(out, c);
 454
 455         if (attr == &sysfs_open_buckets)
 456                 bch2_open_buckets_to_text(out, c);
 457
 458         if (attr == &sysfs_write_points)
 459                 bch2_write_points_to_text(out, c);
 460
 461         if (attr == &sysfs_compression_stats)
 462                 bch2_compression_stats_to_text(out, c);
 463
 464         if (attr == &sysfs_new_stripes)
 465                 bch2_new_stripes_to_text(out, c);
 466
 467         if (attr == &sysfs_io_timers_read)
 468                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 469
 470         if (attr == &sysfs_io_timers_write)
 471                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 472
 473         if (attr == &sysfs_data_jobs)
 474                 data_progress_to_text(out, c);
 475
 476 #ifdef BCH_WRITE_REF_DEBUG
 477         if (attr == &sysfs_write_refs)
 478                 bch2_write_refs_to_text(out, c);
 479 #endif
 480
 481         if (attr == &sysfs_nocow_lock_table)
 482                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 483
 484         return 0;
 485 }
 486
 487 STORE(bch2_fs)
 488 {
 489         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 490
 491         if (attr == &sysfs_btree_gc_periodic) {
 492                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 493                         ?: (ssize_t) size;
 494
 495                 wake_up_process(c->gc_thread);
 496                 return ret;
 497         }
 498
 499         if (attr == &sysfs_copy_gc_enabled) {
 500                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 501                         ?: (ssize_t) size;
 502
 503                 if (c->copygc_thread)
 504                         wake_up_process(c->copygc_thread);
 505                 return ret;
 506         }
 507
 508         if (attr == &sysfs_rebalance_enabled) {
 509                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 510                         ?: (ssize_t) size;
 511
 512                 rebalance_wakeup(c);
 513                 return ret;
 514         }
 515
 516         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 517
 518         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 519
 520         /* Debugging: */
 521
 522         if (!test_bit(BCH_FS_STARTED, &c->flags))
 523                 return -EPERM;
 524
 525         /* Debugging: */
 526
 527         if (!test_bit(BCH_FS_RW, &c->flags))
 528                 return -EROFS;
 529
 530         if (attr == &sysfs_prune_cache) {
 531                 struct shrink_control sc;
 532
 533                 sc.gfp_mask = GFP_KERNEL;
 534                 sc.nr_to_scan = strtoul_or_return(buf);
 535                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 536         }
 537
 538         if (attr == &sysfs_btree_wakeup)
 539                 bch2_btree_wakeup_all(c);
 540
 541         if (attr == &sysfs_trigger_gc) {
 542                 /*
 543                  * Full gc is currently incompatible with btree key cache:
 544                  */
 545 #if 0
 546                 down_read(&c->state_lock);
 547                 bch2_gc(c, false, false);
 548                 up_read(&c->state_lock);
 549 #else
 550                 bch2_gc_gens(c);
 551 #endif
 552         }
 553
 554         if (attr == &sysfs_trigger_discards)
 555                 bch2_do_discards(c);
 556
 557         if (attr == &sysfs_trigger_invalidates)
 558                 bch2_do_invalidates(c);
 559
 560 #ifdef CONFIG_BCACHEFS_TESTS
 561         if (attr == &sysfs_perf_test) {
 562                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 563                 char *test              = strsep(&p, " \t\n");
 564                 char *nr_str            = strsep(&p, " \t\n");
 565                 char *threads_str       = strsep(&p, " \t\n");
 566                 unsigned threads;
 567                 u64 nr;
 568                 int ret = -EINVAL;
 569
 570                 if (threads_str &&
 571                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 572                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 573                         ret = bch2_btree_perf_test(c, test, nr, threads);
 574                 kfree(tmp);
 575
 576                 if (ret)
 577                         size = ret;
 578         }
 579 #endif
 580         return size;
 581 }
 582 SYSFS_OPS(bch2_fs);
 583
 584 struct attribute *bch2_fs_files[] = {
 585         &sysfs_minor,
 586         &sysfs_btree_cache_size,
 587         &sysfs_btree_write_stats,
 588
 589         &sysfs_promote_whole_extents,
 590
 591         &sysfs_compression_stats,
 592
 593 #ifdef CONFIG_BCACHEFS_TESTS
 594         &sysfs_perf_test,
 595 #endif
 596         NULL
 597 };
 598
 599 /* counters dir */
 600
 601 SHOW(bch2_fs_counters)
 602 {
 603         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 604         u64 counter = 0;
 605         u64 counter_since_mount = 0;
 606
 607         printbuf_tabstop_push(out, 32);
 608
 609         #define x(t, ...) \
 610                 if (attr == &sysfs_##t) {                                       \
 611                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 612                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 613                         prt_printf(out, "since mount:");                                \
 614                         prt_tab(out);                                           \
 615                         prt_human_readable_u64(out, counter_since_mount << 9);  \
 616                         prt_newline(out);                                       \
 617                                                                                 \
 618                         prt_printf(out, "since filesystem creation:");          \
 619                         prt_tab(out);                                           \
 620                         prt_human_readable_u64(out, counter << 9);              \
 621                         prt_newline(out);                                       \
 622                 }
 623         BCH_PERSISTENT_COUNTERS()
 624         #undef x
 625         return 0;
 626 }
 627
 628 STORE(bch2_fs_counters) {
 629         return 0;
 630 }
 631
 632 SYSFS_OPS(bch2_fs_counters);
 633
 634 struct attribute *bch2_fs_counters_files[] = {
 635 #define x(t, ...) \
 636         &sysfs_##t,
 637         BCH_PERSISTENT_COUNTERS()
 638 #undef x
 639         NULL
 640 };
 641 /* internal dir - just a wrapper */
 642
 643 SHOW(bch2_fs_internal)
 644 {
 645         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 646
 647         return bch2_fs_to_text(out, &c->kobj, attr);
 648 }
 649
 650 STORE(bch2_fs_internal)
 651 {
 652         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 653
 654         return bch2_fs_store(&c->kobj, attr, buf, size);
 655 }
 656 SYSFS_OPS(bch2_fs_internal);
 657
 658 struct attribute *bch2_fs_internal_files[] = {
 659         &sysfs_journal_debug,
 660         &sysfs_btree_updates,
 661         &sysfs_btree_cache,
 662         &sysfs_btree_key_cache,
 663         &sysfs_new_stripes,
 664         &sysfs_stripes_heap,
 665         &sysfs_open_buckets,
 666         &sysfs_write_points,
 667 #ifdef BCH_WRITE_REF_DEBUG
 668         &sysfs_write_refs,
 669 #endif
 670         &sysfs_nocow_lock_table,
 671         &sysfs_io_timers_read,
 672         &sysfs_io_timers_write,
 673
 674         &sysfs_trigger_gc,
 675         &sysfs_trigger_discards,
 676         &sysfs_trigger_invalidates,
 677         &sysfs_prune_cache,
 678         &sysfs_btree_wakeup,
 679
 680         &sysfs_gc_gens_pos,
 681
 682         &sysfs_copy_gc_enabled,
 683         &sysfs_copy_gc_wait,
 684
 685         &sysfs_rebalance_enabled,
 686         &sysfs_rebalance_work,
 687         sysfs_pd_controller_files(rebalance),
 688
 689         &sysfs_data_jobs,
 690
 691         &sysfs_internal_uuid,
 692         NULL
 693 };
 694
 695 /* options */
 696
 697 SHOW(bch2_fs_opts_dir)
 698 {
 699         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 700         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 701         int id = opt - bch2_opt_table;
 702         u64 v = bch2_opt_get_by_id(&c->opts, id);
 703
 704         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 705         prt_char(out, '\n');
 706
 707         return 0;
 708 }
 709
 710 STORE(bch2_fs_opts_dir)
 711 {
 712         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 713         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 714         int ret, id = opt - bch2_opt_table;
 715         char *tmp;
 716         u64 v;
 717
 718         /*
 719          * We don't need to take c->writes for correctness, but it eliminates an
 720          * unsightly error message in the dmesg log when we're RO:
 721          */
 722         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 723                 return -EROFS;
 724
 725         tmp = kstrdup(buf, GFP_KERNEL);
 726         if (!tmp) {
 727                 ret = -ENOMEM;
 728                 goto err;
 729         }
 730
 731         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 732         kfree(tmp);
 733
 734         if (ret < 0)
 735                 goto err;
 736
 737         ret = bch2_opt_check_may_set(c, id, v);
 738         if (ret < 0)
 739                 goto err;
 740
 741         bch2_opt_set_sb(c, opt, v);
 742         bch2_opt_set_by_id(&c->opts, id, v);
 743
 744         if ((id == Opt_background_target ||
 745              id == Opt_background_compression) && v) {
 746                 bch2_rebalance_add_work(c, S64_MAX);
 747                 rebalance_wakeup(c);
 748         }
 749
 750         ret = size;
 751 err:
 752         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 753         return ret;
 754 }
 755 SYSFS_OPS(bch2_fs_opts_dir);
 756
 757 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 758
 759 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 760 {
 761         const struct bch_option *i;
 762         int ret;
 763
 764         for (i = bch2_opt_table;
 765              i < bch2_opt_table + bch2_opts_nr;
 766              i++) {
 767                 if (!(i->flags & OPT_FS))
 768                         continue;
 769
 770                 ret = sysfs_create_file(kobj, &i->attr);
 771                 if (ret)
 772                         return ret;
 773         }
 774
 775         return 0;
 776 }
 777
 778 /* time stats */
 779
 780 SHOW(bch2_fs_time_stats)
 781 {
 782         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 783
 784 #define x(name)                                                         \
 785         if (attr == &sysfs_time_stat_##name)                            \
 786                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 787         BCH_TIME_STATS()
 788 #undef x
 789
 790         return 0;
 791 }
 792
 793 STORE(bch2_fs_time_stats)
 794 {
 795         return size;
 796 }
 797 SYSFS_OPS(bch2_fs_time_stats);
 798
 799 struct attribute *bch2_fs_time_stats_files[] = {
 800 #define x(name)                                         \
 801         &sysfs_time_stat_##name,
 802         BCH_TIME_STATS()
 803 #undef x
 804         NULL
 805 };
 806
 807 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 808 {
 809         struct bch_fs *c = ca->fs;
 810         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 811         unsigned i, nr[BCH_DATA_NR];
 812
 813         memset(nr, 0, sizeof(nr));
 814
 815         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 816                 nr[c->open_buckets[i].data_type]++;
 817
 818         prt_printf(out,
 819                "\t\t\t buckets\t sectors      fragmented\n"
 820                "capacity\t%16llu\n",
 821                ca->mi.nbuckets - ca->mi.first_bucket);
 822
 823         for (i = 0; i < BCH_DATA_NR; i++)
 824                 prt_printf(out, "%-16s%16llu%16llu%16llu\n",
 825                        bch2_data_types[i], stats.d[i].buckets,
 826                        stats.d[i].sectors, stats.d[i].fragmented);
 827
 828         prt_printf(out,
 829                "ec\t\t%16llu\n"
 830                "\n"
 831                "freelist_wait\t\t%s\n"
 832                "open buckets allocated\t%u\n"
 833                "open buckets this dev\t%u\n"
 834                "open buckets total\t%u\n"
 835                "open_buckets_wait\t%s\n"
 836                "open_buckets_btree\t%u\n"
 837                "open_buckets_user\t%u\n"
 838                "buckets_to_invalidate\t%llu\n"
 839                "btree reserve cache\t%u\n",
 840                stats.buckets_ec,
 841                c->freelist_wait.list.first              ? "waiting" : "empty",
 842                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 843                ca->nr_open_buckets,
 844                OPEN_BUCKETS_COUNT,
 845                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 846                nr[BCH_DATA_btree],
 847                nr[BCH_DATA_user],
 848                should_invalidate_buckets(ca, stats),
 849                c->btree_reserve_cache_nr);
 850 }
 851
 852 static const char * const bch2_rw[] = {
 853         "read",
 854         "write",
 855         NULL
 856 };
 857
 858 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 859 {
 860         int rw, i;
 861
 862         for (rw = 0; rw < 2; rw++) {
 863                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 864
 865                 for (i = 1; i < BCH_DATA_NR; i++)
 866                         prt_printf(out, "%-12s:%12llu\n",
 867                                bch2_data_types[i],
 868                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 869         }
 870 }
 871
 872 SHOW(bch2_dev)
 873 {
 874         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 875         struct bch_fs *c = ca->fs;
 876
 877         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 878
 879         sysfs_print(bucket_size,        bucket_bytes(ca));
 880         sysfs_print(first_bucket,       ca->mi.first_bucket);
 881         sysfs_print(nbuckets,           ca->mi.nbuckets);
 882         sysfs_print(durability,         ca->mi.durability);
 883         sysfs_print(discard,            ca->mi.discard);
 884
 885         if (attr == &sysfs_label) {
 886                 if (ca->mi.group) {
 887                         mutex_lock(&c->sb_lock);
 888                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 889                                                ca->mi.group - 1);
 890                         mutex_unlock(&c->sb_lock);
 891                 }
 892
 893                 prt_char(out, '\n');
 894         }
 895
 896         if (attr == &sysfs_has_data) {
 897                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 898                 prt_char(out, '\n');
 899         }
 900
 901         if (attr == &sysfs_state_rw) {
 902                 prt_string_option(out, bch2_member_states, ca->mi.state);
 903                 prt_char(out, '\n');
 904         }
 905
 906         if (attr == &sysfs_iodone)
 907                 dev_iodone_to_text(out, ca);
 908
 909         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 910         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 911
 912         if (attr == &sysfs_io_latency_stats_read)
 913                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 914
 915         if (attr == &sysfs_io_latency_stats_write)
 916                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 917
 918         sysfs_printf(congested,                 "%u%%",
 919                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 920                      * 100 / CONGESTED_MAX);
 921
 922         if (attr == &sysfs_alloc_debug)
 923                 dev_alloc_debug_to_text(out, ca);
 924
 925         return 0;
 926 }
 927
 928 STORE(bch2_dev)
 929 {
 930         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 931         struct bch_fs *c = ca->fs;
 932         struct bch_member *mi;
 933
 934         if (attr == &sysfs_discard) {
 935                 bool v = strtoul_or_return(buf);
 936
 937                 mutex_lock(&c->sb_lock);
 938                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 939
 940                 if (v != BCH_MEMBER_DISCARD(mi)) {
 941                         SET_BCH_MEMBER_DISCARD(mi, v);
 942                         bch2_write_super(c);
 943                 }
 944                 mutex_unlock(&c->sb_lock);
 945         }
 946
 947         if (attr == &sysfs_durability) {
 948                 u64 v = strtoul_or_return(buf);
 949
 950                 mutex_lock(&c->sb_lock);
 951                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 952
 953                 if (v != BCH_MEMBER_DURABILITY(mi)) {
 954                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 955                         bch2_write_super(c);
 956                 }
 957                 mutex_unlock(&c->sb_lock);
 958         }
 959
 960         if (attr == &sysfs_label) {
 961                 char *tmp;
 962                 int ret;
 963
 964                 tmp = kstrdup(buf, GFP_KERNEL);
 965                 if (!tmp)
 966                         return -ENOMEM;
 967
 968                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 969                 kfree(tmp);
 970                 if (ret)
 971                         return ret;
 972         }
 973
 974         return size;
 975 }
 976 SYSFS_OPS(bch2_dev);
 977
 978 struct attribute *bch2_dev_files[] = {
 979         &sysfs_uuid,
 980         &sysfs_bucket_size,
 981         &sysfs_first_bucket,
 982         &sysfs_nbuckets,
 983         &sysfs_durability,
 984
 985         /* settings: */
 986         &sysfs_discard,
 987         &sysfs_state_rw,
 988         &sysfs_label,
 989
 990         &sysfs_has_data,
 991         &sysfs_iodone,
 992
 993         &sysfs_io_latency_read,
 994         &sysfs_io_latency_write,
 995         &sysfs_io_latency_stats_read,
 996         &sysfs_io_latency_stats_write,
 997         &sysfs_congested,
 998
 999         /* debug: */
1000         &sysfs_alloc_debug,
1001         NULL
1002 };
1003
1004 #endif  /* _BCACHEFS_SYSFS_H_ */