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(open_buckets_partial);
 198 read_attribute(write_points);
 199 read_attribute(nocow_lock_table);
 200
 201 #ifdef BCH_WRITE_REF_DEBUG
 202 read_attribute(write_refs);
 203
 204 const char * const bch2_write_refs[] = {
 205 #define x(n)    #n,
 206         BCH_WRITE_REFS()
 207 #undef x
 208         NULL
 209 };
 210
 211 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 212 {
 213         bch2_printbuf_tabstop_push(out, 24);
 214
 215         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 216                 prt_str(out, bch2_write_refs[i]);
 217                 prt_tab(out);
 218                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 219                 prt_newline(out);
 220         }
 221 }
 222 #endif
 223
 224 read_attribute(internal_uuid);
 225
 226 read_attribute(has_data);
 227 read_attribute(alloc_debug);
 228
 229 #define x(t, n, ...) read_attribute(t);
 230 BCH_PERSISTENT_COUNTERS()
 231 #undef x
 232
 233 rw_attribute(discard);
 234 rw_attribute(label);
 235
 236 rw_attribute(copy_gc_enabled);
 237 read_attribute(copy_gc_wait);
 238
 239 rw_attribute(rebalance_enabled);
 240 sysfs_pd_controller_attribute(rebalance);
 241 read_attribute(rebalance_work);
 242 rw_attribute(promote_whole_extents);
 243
 244 read_attribute(new_stripes);
 245
 246 read_attribute(io_timers_read);
 247 read_attribute(io_timers_write);
 248
 249 read_attribute(data_jobs);
 250
 251 #ifdef CONFIG_BCACHEFS_TESTS
 252 write_attribute(perf_test);
 253 #endif /* CONFIG_BCACHEFS_TESTS */
 254
 255 #define x(_name)                                                \
 256         static struct attribute sysfs_time_stat_##_name =               \
 257                 { .name = #_name, .mode = 0444 };
 258         BCH_TIME_STATS()
 259 #undef x
 260
 261 static struct attribute sysfs_state_rw = {
 262         .name = "state",
 263         .mode =  0444,
 264 };
 265
 266 static size_t bch2_btree_cache_size(struct bch_fs *c)
 267 {
 268         size_t ret = 0;
 269         struct btree *b;
 270
 271         mutex_lock(&c->btree_cache.lock);
 272         list_for_each_entry(b, &c->btree_cache.live, list)
 273                 ret += btree_bytes(c);
 274
 275         mutex_unlock(&c->btree_cache.lock);
 276         return ret;
 277 }
 278
 279 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 280 {
 281         long ret = 0;
 282         struct bch_move_stats *stats;
 283
 284         mutex_lock(&c->data_progress_lock);
 285         list_for_each_entry(stats, &c->data_progress_list, list) {
 286                 prt_printf(out, "%s: data type %s btree_id %s position: ",
 287                        stats->name,
 288                        bch2_data_types[stats->data_type],
 289                        bch2_btree_ids[stats->btree_id]);
 290                 bch2_bpos_to_text(out, stats->pos);
 291                 prt_printf(out, "%s", "\n");
 292         }
 293
 294         mutex_unlock(&c->data_progress_lock);
 295         return ret;
 296 }
 297
 298 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 299 {
 300         struct btree_trans trans;
 301         struct btree_iter iter;
 302         struct bkey_s_c k;
 303         enum btree_id id;
 304         u64 nr_uncompressed_extents = 0,
 305             nr_compressed_extents = 0,
 306             nr_incompressible_extents = 0,
 307             uncompressed_sectors = 0,
 308             incompressible_sectors = 0,
 309             compressed_sectors_compressed = 0,
 310             compressed_sectors_uncompressed = 0;
 311         int ret;
 312
 313         if (!test_bit(BCH_FS_STARTED, &c->flags))
 314                 return -EPERM;
 315
 316         bch2_trans_init(&trans, c, 0, 0);
 317
 318         for (id = 0; id < BTREE_ID_NR; id++) {
 319                 if (!btree_type_has_ptrs(id))
 320                         continue;
 321
 322                 for_each_btree_key(&trans, iter, id, POS_MIN,
 323                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 324                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 325                         const union bch_extent_entry *entry;
 326                         struct extent_ptr_decoded p;
 327                         bool compressed = false, uncompressed = false, incompressible = false;
 328
 329                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 330                                 switch (p.crc.compression_type) {
 331                                 case BCH_COMPRESSION_TYPE_none:
 332                                         uncompressed = true;
 333                                         uncompressed_sectors += k.k->size;
 334                                         break;
 335                                 case BCH_COMPRESSION_TYPE_incompressible:
 336                                         incompressible = true;
 337                                         incompressible_sectors += k.k->size;
 338                                         break;
 339                                 default:
 340                                         compressed_sectors_compressed +=
 341                                                 p.crc.compressed_size;
 342                                         compressed_sectors_uncompressed +=
 343                                                 p.crc.uncompressed_size;
 344                                         compressed = true;
 345                                         break;
 346                                 }
 347                         }
 348
 349                         if (incompressible)
 350                                 nr_incompressible_extents++;
 351                         else if (uncompressed)
 352                                 nr_uncompressed_extents++;
 353                         else if (compressed)
 354                                 nr_compressed_extents++;
 355                 }
 356                 bch2_trans_iter_exit(&trans, &iter);
 357         }
 358
 359         bch2_trans_exit(&trans);
 360
 361         if (ret)
 362                 return ret;
 363
 364         prt_printf(out, "uncompressed:\n");
 365         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 366         prt_printf(out, "       size:                   ");
 367         prt_human_readable_u64(out, uncompressed_sectors << 9);
 368         prt_printf(out, "\n");
 369
 370         prt_printf(out, "compressed:\n");
 371         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 372         prt_printf(out, "       compressed size:        ");
 373         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 374         prt_printf(out, "\n");
 375         prt_printf(out, "       uncompressed size:      ");
 376         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 377         prt_printf(out, "\n");
 378
 379         prt_printf(out, "incompressible:\n");
 380         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 381         prt_printf(out, "       size:                   ");
 382         prt_human_readable_u64(out, incompressible_sectors << 9);
 383         prt_printf(out, "\n");
 384         return 0;
 385 }
 386
 387 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 388 {
 389         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 390         bch2_bpos_to_text(out, c->gc_gens_pos);
 391         prt_printf(out, "\n");
 392 }
 393
 394 static void bch2_btree_wakeup_all(struct bch_fs *c)
 395 {
 396         struct btree_trans *trans;
 397
 398         mutex_lock(&c->btree_trans_lock);
 399         list_for_each_entry(trans, &c->btree_trans_list, list) {
 400                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 401
 402                 if (b)
 403                         six_lock_wakeup_all(&b->lock);
 404
 405         }
 406         mutex_unlock(&c->btree_trans_lock);
 407 }
 408
 409 SHOW(bch2_fs)
 410 {
 411         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 412
 413         sysfs_print(minor,                      c->minor);
 414         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 415
 416         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 417
 418         if (attr == &sysfs_btree_write_stats)
 419                 bch2_btree_write_stats_to_text(out, c);
 420
 421         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 422
 423         if (attr == &sysfs_gc_gens_pos)
 424                 bch2_gc_gens_pos_to_text(out, c);
 425
 426         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 427
 428         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 429         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 430         sysfs_hprint(copy_gc_wait,
 431                      max(0LL, c->copygc_wait -
 432                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 433
 434         if (attr == &sysfs_rebalance_work)
 435                 bch2_rebalance_work_to_text(out, c);
 436
 437         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 438
 439         /* Debugging: */
 440
 441         if (attr == &sysfs_journal_debug)
 442                 bch2_journal_debug_to_text(out, &c->journal);
 443
 444         if (attr == &sysfs_btree_updates)
 445                 bch2_btree_updates_to_text(out, c);
 446
 447         if (attr == &sysfs_btree_cache)
 448                 bch2_btree_cache_to_text(out, &c->btree_cache);
 449
 450         if (attr == &sysfs_btree_key_cache)
 451                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 452
 453         if (attr == &sysfs_stripes_heap)
 454                 bch2_stripes_heap_to_text(out, c);
 455
 456         if (attr == &sysfs_open_buckets)
 457                 bch2_open_buckets_to_text(out, c);
 458
 459         if (attr == &sysfs_open_buckets_partial)
 460                 bch2_open_buckets_partial_to_text(out, c);
 461
 462         if (attr == &sysfs_write_points)
 463                 bch2_write_points_to_text(out, c);
 464
 465         if (attr == &sysfs_compression_stats)
 466                 bch2_compression_stats_to_text(out, c);
 467
 468         if (attr == &sysfs_new_stripes)
 469                 bch2_new_stripes_to_text(out, c);
 470
 471         if (attr == &sysfs_io_timers_read)
 472                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 473
 474         if (attr == &sysfs_io_timers_write)
 475                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 476
 477         if (attr == &sysfs_data_jobs)
 478                 data_progress_to_text(out, c);
 479
 480 #ifdef BCH_WRITE_REF_DEBUG
 481         if (attr == &sysfs_write_refs)
 482                 bch2_write_refs_to_text(out, c);
 483 #endif
 484
 485         if (attr == &sysfs_nocow_lock_table)
 486                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 487
 488         return 0;
 489 }
 490
 491 STORE(bch2_fs)
 492 {
 493         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 494
 495         if (attr == &sysfs_btree_gc_periodic) {
 496                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 497                         ?: (ssize_t) size;
 498
 499                 wake_up_process(c->gc_thread);
 500                 return ret;
 501         }
 502
 503         if (attr == &sysfs_copy_gc_enabled) {
 504                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 505                         ?: (ssize_t) size;
 506
 507                 if (c->copygc_thread)
 508                         wake_up_process(c->copygc_thread);
 509                 return ret;
 510         }
 511
 512         if (attr == &sysfs_rebalance_enabled) {
 513                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 514                         ?: (ssize_t) size;
 515
 516                 rebalance_wakeup(c);
 517                 return ret;
 518         }
 519
 520         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 521
 522         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 523
 524         /* Debugging: */
 525
 526         if (!test_bit(BCH_FS_STARTED, &c->flags))
 527                 return -EPERM;
 528
 529         /* Debugging: */
 530
 531         if (!test_bit(BCH_FS_RW, &c->flags))
 532                 return -EROFS;
 533
 534         if (attr == &sysfs_prune_cache) {
 535                 struct shrink_control sc;
 536
 537                 sc.gfp_mask = GFP_KERNEL;
 538                 sc.nr_to_scan = strtoul_or_return(buf);
 539                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 540         }
 541
 542         if (attr == &sysfs_btree_wakeup)
 543                 bch2_btree_wakeup_all(c);
 544
 545         if (attr == &sysfs_trigger_gc) {
 546                 /*
 547                  * Full gc is currently incompatible with btree key cache:
 548                  */
 549 #if 0
 550                 down_read(&c->state_lock);
 551                 bch2_gc(c, false, false);
 552                 up_read(&c->state_lock);
 553 #else
 554                 bch2_gc_gens(c);
 555 #endif
 556         }
 557
 558         if (attr == &sysfs_trigger_discards)
 559                 bch2_do_discards(c);
 560
 561         if (attr == &sysfs_trigger_invalidates)
 562                 bch2_do_invalidates(c);
 563
 564 #ifdef CONFIG_BCACHEFS_TESTS
 565         if (attr == &sysfs_perf_test) {
 566                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 567                 char *test              = strsep(&p, " \t\n");
 568                 char *nr_str            = strsep(&p, " \t\n");
 569                 char *threads_str       = strsep(&p, " \t\n");
 570                 unsigned threads;
 571                 u64 nr;
 572                 int ret = -EINVAL;
 573
 574                 if (threads_str &&
 575                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 576                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 577                         ret = bch2_btree_perf_test(c, test, nr, threads);
 578                 kfree(tmp);
 579
 580                 if (ret)
 581                         size = ret;
 582         }
 583 #endif
 584         return size;
 585 }
 586 SYSFS_OPS(bch2_fs);
 587
 588 struct attribute *bch2_fs_files[] = {
 589         &sysfs_minor,
 590         &sysfs_btree_cache_size,
 591         &sysfs_btree_write_stats,
 592
 593         &sysfs_promote_whole_extents,
 594
 595         &sysfs_compression_stats,
 596
 597 #ifdef CONFIG_BCACHEFS_TESTS
 598         &sysfs_perf_test,
 599 #endif
 600         NULL
 601 };
 602
 603 /* counters dir */
 604
 605 SHOW(bch2_fs_counters)
 606 {
 607         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 608         u64 counter = 0;
 609         u64 counter_since_mount = 0;
 610
 611         printbuf_tabstop_push(out, 32);
 612
 613         #define x(t, ...) \
 614                 if (attr == &sysfs_##t) {                                       \
 615                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 616                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 617                         prt_printf(out, "since mount:");                                \
 618                         prt_tab(out);                                           \
 619                         prt_human_readable_u64(out, counter_since_mount << 9);  \
 620                         prt_newline(out);                                       \
 621                                                                                 \
 622                         prt_printf(out, "since filesystem creation:");          \
 623                         prt_tab(out);                                           \
 624                         prt_human_readable_u64(out, counter << 9);              \
 625                         prt_newline(out);                                       \
 626                 }
 627         BCH_PERSISTENT_COUNTERS()
 628         #undef x
 629         return 0;
 630 }
 631
 632 STORE(bch2_fs_counters) {
 633         return 0;
 634 }
 635
 636 SYSFS_OPS(bch2_fs_counters);
 637
 638 struct attribute *bch2_fs_counters_files[] = {
 639 #define x(t, ...) \
 640         &sysfs_##t,
 641         BCH_PERSISTENT_COUNTERS()
 642 #undef x
 643         NULL
 644 };
 645 /* internal dir - just a wrapper */
 646
 647 SHOW(bch2_fs_internal)
 648 {
 649         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 650
 651         return bch2_fs_to_text(out, &c->kobj, attr);
 652 }
 653
 654 STORE(bch2_fs_internal)
 655 {
 656         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 657
 658         return bch2_fs_store(&c->kobj, attr, buf, size);
 659 }
 660 SYSFS_OPS(bch2_fs_internal);
 661
 662 struct attribute *bch2_fs_internal_files[] = {
 663         &sysfs_journal_debug,
 664         &sysfs_btree_updates,
 665         &sysfs_btree_cache,
 666         &sysfs_btree_key_cache,
 667         &sysfs_new_stripes,
 668         &sysfs_stripes_heap,
 669         &sysfs_open_buckets,
 670         &sysfs_open_buckets_partial,
 671         &sysfs_write_points,
 672 #ifdef BCH_WRITE_REF_DEBUG
 673         &sysfs_write_refs,
 674 #endif
 675         &sysfs_nocow_lock_table,
 676         &sysfs_io_timers_read,
 677         &sysfs_io_timers_write,
 678
 679         &sysfs_trigger_gc,
 680         &sysfs_trigger_discards,
 681         &sysfs_trigger_invalidates,
 682         &sysfs_prune_cache,
 683         &sysfs_btree_wakeup,
 684
 685         &sysfs_gc_gens_pos,
 686
 687         &sysfs_copy_gc_enabled,
 688         &sysfs_copy_gc_wait,
 689
 690         &sysfs_rebalance_enabled,
 691         &sysfs_rebalance_work,
 692         sysfs_pd_controller_files(rebalance),
 693
 694         &sysfs_data_jobs,
 695
 696         &sysfs_internal_uuid,
 697         NULL
 698 };
 699
 700 /* options */
 701
 702 SHOW(bch2_fs_opts_dir)
 703 {
 704         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 705         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 706         int id = opt - bch2_opt_table;
 707         u64 v = bch2_opt_get_by_id(&c->opts, id);
 708
 709         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 710         prt_char(out, '\n');
 711
 712         return 0;
 713 }
 714
 715 STORE(bch2_fs_opts_dir)
 716 {
 717         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 718         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 719         int ret, id = opt - bch2_opt_table;
 720         char *tmp;
 721         u64 v;
 722
 723         /*
 724          * We don't need to take c->writes for correctness, but it eliminates an
 725          * unsightly error message in the dmesg log when we're RO:
 726          */
 727         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 728                 return -EROFS;
 729
 730         tmp = kstrdup(buf, GFP_KERNEL);
 731         if (!tmp) {
 732                 ret = -ENOMEM;
 733                 goto err;
 734         }
 735
 736         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 737         kfree(tmp);
 738
 739         if (ret < 0)
 740                 goto err;
 741
 742         ret = bch2_opt_check_may_set(c, id, v);
 743         if (ret < 0)
 744                 goto err;
 745
 746         bch2_opt_set_sb(c, opt, v);
 747         bch2_opt_set_by_id(&c->opts, id, v);
 748
 749         if ((id == Opt_background_target ||
 750              id == Opt_background_compression) && v) {
 751                 bch2_rebalance_add_work(c, S64_MAX);
 752                 rebalance_wakeup(c);
 753         }
 754
 755         ret = size;
 756 err:
 757         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 758         return ret;
 759 }
 760 SYSFS_OPS(bch2_fs_opts_dir);
 761
 762 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 763
 764 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 765 {
 766         const struct bch_option *i;
 767         int ret;
 768
 769         for (i = bch2_opt_table;
 770              i < bch2_opt_table + bch2_opts_nr;
 771              i++) {
 772                 if (!(i->flags & OPT_FS))
 773                         continue;
 774
 775                 ret = sysfs_create_file(kobj, &i->attr);
 776                 if (ret)
 777                         return ret;
 778         }
 779
 780         return 0;
 781 }
 782
 783 /* time stats */
 784
 785 SHOW(bch2_fs_time_stats)
 786 {
 787         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 788
 789 #define x(name)                                                         \
 790         if (attr == &sysfs_time_stat_##name)                            \
 791                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 792         BCH_TIME_STATS()
 793 #undef x
 794
 795         return 0;
 796 }
 797
 798 STORE(bch2_fs_time_stats)
 799 {
 800         return size;
 801 }
 802 SYSFS_OPS(bch2_fs_time_stats);
 803
 804 struct attribute *bch2_fs_time_stats_files[] = {
 805 #define x(name)                                         \
 806         &sysfs_time_stat_##name,
 807         BCH_TIME_STATS()
 808 #undef x
 809         NULL
 810 };
 811
 812 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 813 {
 814         struct bch_fs *c = ca->fs;
 815         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 816         unsigned i, nr[BCH_DATA_NR];
 817
 818         memset(nr, 0, sizeof(nr));
 819
 820         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 821                 nr[c->open_buckets[i].data_type]++;
 822
 823         prt_printf(out,
 824                "\t\t\t buckets\t sectors      fragmented\n"
 825                "capacity\t%16llu\n",
 826                ca->mi.nbuckets - ca->mi.first_bucket);
 827
 828         for (i = 0; i < BCH_DATA_NR; i++)
 829                 prt_printf(out, "%-16s%16llu%16llu%16llu\n",
 830                        bch2_data_types[i], stats.d[i].buckets,
 831                        stats.d[i].sectors, stats.d[i].fragmented);
 832
 833         prt_printf(out,
 834                "ec\t\t%16llu\n"
 835                "\n"
 836                "freelist_wait\t\t%s\n"
 837                "open buckets allocated\t%u\n"
 838                "open buckets this dev\t%u\n"
 839                "open buckets total\t%u\n"
 840                "open_buckets_wait\t%s\n"
 841                "open_buckets_btree\t%u\n"
 842                "open_buckets_user\t%u\n"
 843                "buckets_to_invalidate\t%llu\n"
 844                "btree reserve cache\t%u\n",
 845                stats.buckets_ec,
 846                c->freelist_wait.list.first              ? "waiting" : "empty",
 847                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 848                ca->nr_open_buckets,
 849                OPEN_BUCKETS_COUNT,
 850                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 851                nr[BCH_DATA_btree],
 852                nr[BCH_DATA_user],
 853                should_invalidate_buckets(ca, stats),
 854                c->btree_reserve_cache_nr);
 855 }
 856
 857 static const char * const bch2_rw[] = {
 858         "read",
 859         "write",
 860         NULL
 861 };
 862
 863 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 864 {
 865         int rw, i;
 866
 867         for (rw = 0; rw < 2; rw++) {
 868                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 869
 870                 for (i = 1; i < BCH_DATA_NR; i++)
 871                         prt_printf(out, "%-12s:%12llu\n",
 872                                bch2_data_types[i],
 873                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 874         }
 875 }
 876
 877 SHOW(bch2_dev)
 878 {
 879         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 880         struct bch_fs *c = ca->fs;
 881
 882         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 883
 884         sysfs_print(bucket_size,        bucket_bytes(ca));
 885         sysfs_print(first_bucket,       ca->mi.first_bucket);
 886         sysfs_print(nbuckets,           ca->mi.nbuckets);
 887         sysfs_print(durability,         ca->mi.durability);
 888         sysfs_print(discard,            ca->mi.discard);
 889
 890         if (attr == &sysfs_label) {
 891                 if (ca->mi.group) {
 892                         mutex_lock(&c->sb_lock);
 893                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 894                                                ca->mi.group - 1);
 895                         mutex_unlock(&c->sb_lock);
 896                 }
 897
 898                 prt_char(out, '\n');
 899         }
 900
 901         if (attr == &sysfs_has_data) {
 902                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 903                 prt_char(out, '\n');
 904         }
 905
 906         if (attr == &sysfs_state_rw) {
 907                 prt_string_option(out, bch2_member_states, ca->mi.state);
 908                 prt_char(out, '\n');
 909         }
 910
 911         if (attr == &sysfs_iodone)
 912                 dev_iodone_to_text(out, ca);
 913
 914         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 915         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 916
 917         if (attr == &sysfs_io_latency_stats_read)
 918                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 919
 920         if (attr == &sysfs_io_latency_stats_write)
 921                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 922
 923         sysfs_printf(congested,                 "%u%%",
 924                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 925                      * 100 / CONGESTED_MAX);
 926
 927         if (attr == &sysfs_alloc_debug)
 928                 dev_alloc_debug_to_text(out, ca);
 929
 930         return 0;
 931 }
 932
 933 STORE(bch2_dev)
 934 {
 935         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 936         struct bch_fs *c = ca->fs;
 937         struct bch_member *mi;
 938
 939         if (attr == &sysfs_discard) {
 940                 bool v = strtoul_or_return(buf);
 941
 942                 mutex_lock(&c->sb_lock);
 943                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 944
 945                 if (v != BCH_MEMBER_DISCARD(mi)) {
 946                         SET_BCH_MEMBER_DISCARD(mi, v);
 947                         bch2_write_super(c);
 948                 }
 949                 mutex_unlock(&c->sb_lock);
 950         }
 951
 952         if (attr == &sysfs_durability) {
 953                 u64 v = strtoul_or_return(buf);
 954
 955                 mutex_lock(&c->sb_lock);
 956                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 957
 958                 if (v != BCH_MEMBER_DURABILITY(mi)) {
 959                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 960                         bch2_write_super(c);
 961                 }
 962                 mutex_unlock(&c->sb_lock);
 963         }
 964
 965         if (attr == &sysfs_label) {
 966                 char *tmp;
 967                 int ret;
 968
 969                 tmp = kstrdup(buf, GFP_KERNEL);
 970                 if (!tmp)
 971                         return -ENOMEM;
 972
 973                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 974                 kfree(tmp);
 975                 if (ret)
 976                         return ret;
 977         }
 978
 979         return size;
 980 }
 981 SYSFS_OPS(bch2_dev);
 982
 983 struct attribute *bch2_dev_files[] = {
 984         &sysfs_uuid,
 985         &sysfs_bucket_size,
 986         &sysfs_first_bucket,
 987         &sysfs_nbuckets,
 988         &sysfs_durability,
 989
 990         /* settings: */
 991         &sysfs_discard,
 992         &sysfs_state_rw,
 993         &sysfs_label,
 994
 995         &sysfs_has_data,
 996         &sysfs_iodone,
 997
 998         &sysfs_io_latency_read,
 999         &sysfs_io_latency_write,
1000         &sysfs_io_latency_stats_read,
1001         &sysfs_io_latency_stats_write,
1002         &sysfs_congested,
1003
1004         /* debug: */
1005         &sysfs_alloc_debug,
1006         NULL
1007 };
1008
1009 #endif  /* _BCACHEFS_SYSFS_H_ */