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 "movinggc.h"
  31 #include "nocow_locking.h"
  32 #include "opts.h"
  33 #include "rebalance.h"
  34 #include "replicas.h"
  35 #include "super-io.h"
  36 #include "tests.h"
  37
  38 #include <linux/blkdev.h>
  39 #include <linux/sort.h>
  40 #include <linux/sched/clock.h>
  41
  42 #include "util.h"
  43
  44 #define SYSFS_OPS(type)                                                 \
  45 const struct sysfs_ops type ## _sysfs_ops = {                           \
  46         .show   = type ## _show,                                        \
  47         .store  = type ## _store                                        \
  48 }
  49
  50 #define SHOW(fn)                                                        \
  51 static ssize_t fn ## _to_text(struct printbuf *,                        \
  52                               struct kobject *, struct attribute *);    \
  53                                                                         \
  54 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  55                            char *buf)                                   \
  56 {                                                                       \
  57         struct printbuf out = PRINTBUF;                                 \
  58         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  59                                                                         \
  60         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  61                 prt_newline(&out);                                      \
  62                                                                         \
  63         if (!ret && out.allocation_failure)                             \
  64                 ret = -ENOMEM;                                          \
  65                                                                         \
  66         if (!ret) {                                                     \
  67                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  68                 memcpy(buf, out.buf, ret);                              \
  69         }                                                               \
  70         printbuf_exit(&out);                                            \
  71         return bch2_err_class(ret);                                     \
  72 }                                                                       \
  73                                                                         \
  74 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  75                               struct attribute *attr)
  76
  77 #define STORE(fn)                                                       \
  78 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
  79                             const char *, size_t);                      \
  80                                                                         \
  81 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  82                             const char *buf, size_t size)               \
  83 {                                                                       \
  84         return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
  85 }                                                                       \
  86                                                                         \
  87 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
  88                                   const char *buf, size_t size)
  89
  90 #define __sysfs_attribute(_name, _mode)                                 \
  91         static struct attribute sysfs_##_name =                         \
  92                 { .name = #_name, .mode = _mode }
  93
  94 #define write_attribute(n)      __sysfs_attribute(n, 0200)
  95 #define read_attribute(n)       __sysfs_attribute(n, 0444)
  96 #define rw_attribute(n)         __sysfs_attribute(n, 0644)
  97
  98 #define sysfs_printf(file, fmt, ...)                                    \
  99 do {                                                                    \
 100         if (attr == &sysfs_ ## file)                                    \
 101                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
 102 } while (0)
 103
 104 #define sysfs_print(file, var)                                          \
 105 do {                                                                    \
 106         if (attr == &sysfs_ ## file)                                    \
 107                 snprint(out, var);                                      \
 108 } while (0)
 109
 110 #define sysfs_hprint(file, val)                                         \
 111 do {                                                                    \
 112         if (attr == &sysfs_ ## file)                                    \
 113                 prt_human_readable_s64(out, val);                       \
 114 } while (0)
 115
 116 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 117 #define var_print(_var)         sysfs_print(_var, var(_var))
 118 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 119
 120 #define sysfs_strtoul(file, var)                                        \
 121 do {                                                                    \
 122         if (attr == &sysfs_ ## file)                                    \
 123                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 124 } while (0)
 125
 126 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 127 do {                                                                    \
 128         if (attr == &sysfs_ ## file)                                    \
 129                 return strtoul_safe_clamp(buf, var, min, max)           \
 130                         ?: (ssize_t) size;                              \
 131 } while (0)
 132
 133 #define strtoul_or_return(cp)                                           \
 134 ({                                                                      \
 135         unsigned long _v;                                               \
 136         int _r = kstrtoul(cp, 10, &_v);                                 \
 137         if (_r)                                                         \
 138                 return _r;                                              \
 139         _v;                                                             \
 140 })
 141
 142 #define strtoul_restrict_or_return(cp, min, max)                        \
 143 ({                                                                      \
 144         unsigned long __v = 0;                                          \
 145         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 146         if (_r)                                                         \
 147                 return _r;                                              \
 148         __v;                                                            \
 149 })
 150
 151 #define strtoi_h_or_return(cp)                                          \
 152 ({                                                                      \
 153         u64 _v;                                                         \
 154         int _r = strtoi_h(cp, &_v);                                     \
 155         if (_r)                                                         \
 156                 return _r;                                              \
 157         _v;                                                             \
 158 })
 159
 160 #define sysfs_hatoi(file, var)                                          \
 161 do {                                                                    \
 162         if (attr == &sysfs_ ## file)                                    \
 163                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 164 } while (0)
 165
 166 write_attribute(trigger_gc);
 167 write_attribute(trigger_discards);
 168 write_attribute(trigger_invalidates);
 169 write_attribute(prune_cache);
 170 write_attribute(btree_wakeup);
 171 rw_attribute(btree_gc_periodic);
 172 rw_attribute(gc_gens_pos);
 173
 174 read_attribute(uuid);
 175 read_attribute(minor);
 176 read_attribute(bucket_size);
 177 read_attribute(first_bucket);
 178 read_attribute(nbuckets);
 179 rw_attribute(durability);
 180 read_attribute(iodone);
 181
 182 read_attribute(io_latency_read);
 183 read_attribute(io_latency_write);
 184 read_attribute(io_latency_stats_read);
 185 read_attribute(io_latency_stats_write);
 186 read_attribute(congested);
 187
 188 read_attribute(btree_write_stats);
 189
 190 read_attribute(btree_cache_size);
 191 read_attribute(compression_stats);
 192 read_attribute(journal_debug);
 193 read_attribute(btree_updates);
 194 read_attribute(btree_cache);
 195 read_attribute(btree_key_cache);
 196 read_attribute(stripes_heap);
 197 read_attribute(open_buckets);
 198 read_attribute(open_buckets_partial);
 199 read_attribute(write_points);
 200 read_attribute(nocow_lock_table);
 201
 202 #ifdef BCH_WRITE_REF_DEBUG
 203 read_attribute(write_refs);
 204
 205 static const char * const bch2_write_refs[] = {
 206 #define x(n)    #n,
 207         BCH_WRITE_REFS()
 208 #undef x
 209         NULL
 210 };
 211
 212 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 213 {
 214         bch2_printbuf_tabstop_push(out, 24);
 215
 216         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 217                 prt_str(out, bch2_write_refs[i]);
 218                 prt_tab(out);
 219                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 220                 prt_newline(out);
 221         }
 222 }
 223 #endif
 224
 225 read_attribute(internal_uuid);
 226 read_attribute(disk_groups);
 227
 228 read_attribute(has_data);
 229 read_attribute(alloc_debug);
 230
 231 #define x(t, n, ...) read_attribute(t);
 232 BCH_PERSISTENT_COUNTERS()
 233 #undef x
 234
 235 rw_attribute(discard);
 236 rw_attribute(label);
 237
 238 rw_attribute(copy_gc_enabled);
 239 read_attribute(copy_gc_wait);
 240
 241 rw_attribute(rebalance_enabled);
 242 sysfs_pd_controller_attribute(rebalance);
 243 read_attribute(rebalance_work);
 244 rw_attribute(promote_whole_extents);
 245
 246 read_attribute(new_stripes);
 247
 248 read_attribute(io_timers_read);
 249 read_attribute(io_timers_write);
 250
 251 read_attribute(moving_ctxts);
 252
 253 #ifdef CONFIG_BCACHEFS_TESTS
 254 write_attribute(perf_test);
 255 #endif /* CONFIG_BCACHEFS_TESTS */
 256
 257 #define x(_name)                                                \
 258         static struct attribute sysfs_time_stat_##_name =               \
 259                 { .name = #_name, .mode = 0444 };
 260         BCH_TIME_STATS()
 261 #undef x
 262
 263 static struct attribute sysfs_state_rw = {
 264         .name = "state",
 265         .mode =  0444,
 266 };
 267
 268 static size_t bch2_btree_cache_size(struct bch_fs *c)
 269 {
 270         size_t ret = 0;
 271         struct btree *b;
 272
 273         mutex_lock(&c->btree_cache.lock);
 274         list_for_each_entry(b, &c->btree_cache.live, list)
 275                 ret += btree_bytes(c);
 276
 277         mutex_unlock(&c->btree_cache.lock);
 278         return ret;
 279 }
 280
 281 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 282 {
 283         struct btree_trans trans;
 284         struct btree_iter iter;
 285         struct bkey_s_c k;
 286         enum btree_id id;
 287         u64 nr_uncompressed_extents = 0,
 288             nr_compressed_extents = 0,
 289             nr_incompressible_extents = 0,
 290             uncompressed_sectors = 0,
 291             incompressible_sectors = 0,
 292             compressed_sectors_compressed = 0,
 293             compressed_sectors_uncompressed = 0;
 294         int ret;
 295
 296         if (!test_bit(BCH_FS_STARTED, &c->flags))
 297                 return -EPERM;
 298
 299         bch2_trans_init(&trans, c, 0, 0);
 300
 301         for (id = 0; id < BTREE_ID_NR; id++) {
 302                 if (!btree_type_has_ptrs(id))
 303                         continue;
 304
 305                 for_each_btree_key(&trans, iter, id, POS_MIN,
 306                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 307                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 308                         const union bch_extent_entry *entry;
 309                         struct extent_ptr_decoded p;
 310                         bool compressed = false, uncompressed = false, incompressible = false;
 311
 312                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 313                                 switch (p.crc.compression_type) {
 314                                 case BCH_COMPRESSION_TYPE_none:
 315                                         uncompressed = true;
 316                                         uncompressed_sectors += k.k->size;
 317                                         break;
 318                                 case BCH_COMPRESSION_TYPE_incompressible:
 319                                         incompressible = true;
 320                                         incompressible_sectors += k.k->size;
 321                                         break;
 322                                 default:
 323                                         compressed_sectors_compressed +=
 324                                                 p.crc.compressed_size;
 325                                         compressed_sectors_uncompressed +=
 326                                                 p.crc.uncompressed_size;
 327                                         compressed = true;
 328                                         break;
 329                                 }
 330                         }
 331
 332                         if (incompressible)
 333                                 nr_incompressible_extents++;
 334                         else if (uncompressed)
 335                                 nr_uncompressed_extents++;
 336                         else if (compressed)
 337                                 nr_compressed_extents++;
 338                 }
 339                 bch2_trans_iter_exit(&trans, &iter);
 340         }
 341
 342         bch2_trans_exit(&trans);
 343
 344         if (ret)
 345                 return ret;
 346
 347         prt_printf(out, "uncompressed:\n");
 348         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 349         prt_printf(out, "       size:                   ");
 350         prt_human_readable_u64(out, uncompressed_sectors << 9);
 351         prt_printf(out, "\n");
 352
 353         prt_printf(out, "compressed:\n");
 354         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 355         prt_printf(out, "       compressed size:        ");
 356         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 357         prt_printf(out, "\n");
 358         prt_printf(out, "       uncompressed size:      ");
 359         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 360         prt_printf(out, "\n");
 361
 362         prt_printf(out, "incompressible:\n");
 363         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 364         prt_printf(out, "       size:                   ");
 365         prt_human_readable_u64(out, incompressible_sectors << 9);
 366         prt_printf(out, "\n");
 367         return 0;
 368 }
 369
 370 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 371 {
 372         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 373         bch2_bpos_to_text(out, c->gc_gens_pos);
 374         prt_printf(out, "\n");
 375 }
 376
 377 static void bch2_btree_wakeup_all(struct bch_fs *c)
 378 {
 379         struct btree_trans *trans;
 380
 381         seqmutex_lock(&c->btree_trans_lock);
 382         list_for_each_entry(trans, &c->btree_trans_list, list) {
 383                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 384
 385                 if (b)
 386                         six_lock_wakeup_all(&b->lock);
 387
 388         }
 389         seqmutex_unlock(&c->btree_trans_lock);
 390 }
 391
 392 SHOW(bch2_fs)
 393 {
 394         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 395
 396         sysfs_print(minor,                      c->minor);
 397         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 398
 399         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 400
 401         if (attr == &sysfs_btree_write_stats)
 402                 bch2_btree_write_stats_to_text(out, c);
 403
 404         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 405
 406         if (attr == &sysfs_gc_gens_pos)
 407                 bch2_gc_gens_pos_to_text(out, c);
 408
 409         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 410
 411         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 412         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 413
 414         if (attr == &sysfs_copy_gc_wait)
 415                 bch2_copygc_wait_to_text(out, c);
 416
 417         if (attr == &sysfs_rebalance_work)
 418                 bch2_rebalance_work_to_text(out, c);
 419
 420         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 421
 422         /* Debugging: */
 423
 424         if (attr == &sysfs_journal_debug)
 425                 bch2_journal_debug_to_text(out, &c->journal);
 426
 427         if (attr == &sysfs_btree_updates)
 428                 bch2_btree_updates_to_text(out, c);
 429
 430         if (attr == &sysfs_btree_cache)
 431                 bch2_btree_cache_to_text(out, &c->btree_cache);
 432
 433         if (attr == &sysfs_btree_key_cache)
 434                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 435
 436         if (attr == &sysfs_stripes_heap)
 437                 bch2_stripes_heap_to_text(out, c);
 438
 439         if (attr == &sysfs_open_buckets)
 440                 bch2_open_buckets_to_text(out, c);
 441
 442         if (attr == &sysfs_open_buckets_partial)
 443                 bch2_open_buckets_partial_to_text(out, c);
 444
 445         if (attr == &sysfs_write_points)
 446                 bch2_write_points_to_text(out, c);
 447
 448         if (attr == &sysfs_compression_stats)
 449                 bch2_compression_stats_to_text(out, c);
 450
 451         if (attr == &sysfs_new_stripes)
 452                 bch2_new_stripes_to_text(out, c);
 453
 454         if (attr == &sysfs_io_timers_read)
 455                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 456
 457         if (attr == &sysfs_io_timers_write)
 458                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 459
 460         if (attr == &sysfs_moving_ctxts)
 461                 bch2_fs_moving_ctxts_to_text(out, c);
 462
 463 #ifdef BCH_WRITE_REF_DEBUG
 464         if (attr == &sysfs_write_refs)
 465                 bch2_write_refs_to_text(out, c);
 466 #endif
 467
 468         if (attr == &sysfs_nocow_lock_table)
 469                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 470
 471         if (attr == &sysfs_disk_groups)
 472                 bch2_disk_groups_to_text(out, c);
 473
 474         return 0;
 475 }
 476
 477 STORE(bch2_fs)
 478 {
 479         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 480
 481         if (attr == &sysfs_btree_gc_periodic) {
 482                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 483                         ?: (ssize_t) size;
 484
 485                 wake_up_process(c->gc_thread);
 486                 return ret;
 487         }
 488
 489         if (attr == &sysfs_copy_gc_enabled) {
 490                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 491                         ?: (ssize_t) size;
 492
 493                 if (c->copygc_thread)
 494                         wake_up_process(c->copygc_thread);
 495                 return ret;
 496         }
 497
 498         if (attr == &sysfs_rebalance_enabled) {
 499                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 500                         ?: (ssize_t) size;
 501
 502                 rebalance_wakeup(c);
 503                 return ret;
 504         }
 505
 506         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 507
 508         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 509
 510         /* Debugging: */
 511
 512         if (!test_bit(BCH_FS_STARTED, &c->flags))
 513                 return -EPERM;
 514
 515         /* Debugging: */
 516
 517         if (!test_bit(BCH_FS_RW, &c->flags))
 518                 return -EROFS;
 519
 520         if (attr == &sysfs_prune_cache) {
 521                 struct shrink_control sc;
 522
 523                 sc.gfp_mask = GFP_KERNEL;
 524                 sc.nr_to_scan = strtoul_or_return(buf);
 525                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 526         }
 527
 528         if (attr == &sysfs_btree_wakeup)
 529                 bch2_btree_wakeup_all(c);
 530
 531         if (attr == &sysfs_trigger_gc) {
 532                 /*
 533                  * Full gc is currently incompatible with btree key cache:
 534                  */
 535 #if 0
 536                 down_read(&c->state_lock);
 537                 bch2_gc(c, false, false);
 538                 up_read(&c->state_lock);
 539 #else
 540                 bch2_gc_gens(c);
 541 #endif
 542         }
 543
 544         if (attr == &sysfs_trigger_discards)
 545                 bch2_do_discards(c);
 546
 547         if (attr == &sysfs_trigger_invalidates)
 548                 bch2_do_invalidates(c);
 549
 550 #ifdef CONFIG_BCACHEFS_TESTS
 551         if (attr == &sysfs_perf_test) {
 552                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 553                 char *test              = strsep(&p, " \t\n");
 554                 char *nr_str            = strsep(&p, " \t\n");
 555                 char *threads_str       = strsep(&p, " \t\n");
 556                 unsigned threads;
 557                 u64 nr;
 558                 int ret = -EINVAL;
 559
 560                 if (threads_str &&
 561                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 562                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 563                         ret = bch2_btree_perf_test(c, test, nr, threads);
 564                 kfree(tmp);
 565
 566                 if (ret)
 567                         size = ret;
 568         }
 569 #endif
 570         return size;
 571 }
 572 SYSFS_OPS(bch2_fs);
 573
 574 struct attribute *bch2_fs_files[] = {
 575         &sysfs_minor,
 576         &sysfs_btree_cache_size,
 577         &sysfs_btree_write_stats,
 578
 579         &sysfs_promote_whole_extents,
 580
 581         &sysfs_compression_stats,
 582
 583 #ifdef CONFIG_BCACHEFS_TESTS
 584         &sysfs_perf_test,
 585 #endif
 586         NULL
 587 };
 588
 589 /* counters dir */
 590
 591 SHOW(bch2_fs_counters)
 592 {
 593         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 594         u64 counter = 0;
 595         u64 counter_since_mount = 0;
 596
 597         printbuf_tabstop_push(out, 32);
 598
 599         #define x(t, ...) \
 600                 if (attr == &sysfs_##t) {                                       \
 601                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 602                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 603                         prt_printf(out, "since mount:");                                \
 604                         prt_tab(out);                                           \
 605                         prt_human_readable_u64(out, counter_since_mount);       \
 606                         prt_newline(out);                                       \
 607                                                                                 \
 608                         prt_printf(out, "since filesystem creation:");          \
 609                         prt_tab(out);                                           \
 610                         prt_human_readable_u64(out, counter);                   \
 611                         prt_newline(out);                                       \
 612                 }
 613         BCH_PERSISTENT_COUNTERS()
 614         #undef x
 615         return 0;
 616 }
 617
 618 STORE(bch2_fs_counters) {
 619         return 0;
 620 }
 621
 622 SYSFS_OPS(bch2_fs_counters);
 623
 624 struct attribute *bch2_fs_counters_files[] = {
 625 #define x(t, ...) \
 626         &sysfs_##t,
 627         BCH_PERSISTENT_COUNTERS()
 628 #undef x
 629         NULL
 630 };
 631 /* internal dir - just a wrapper */
 632
 633 SHOW(bch2_fs_internal)
 634 {
 635         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 636
 637         return bch2_fs_to_text(out, &c->kobj, attr);
 638 }
 639
 640 STORE(bch2_fs_internal)
 641 {
 642         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 643
 644         return bch2_fs_store(&c->kobj, attr, buf, size);
 645 }
 646 SYSFS_OPS(bch2_fs_internal);
 647
 648 struct attribute *bch2_fs_internal_files[] = {
 649         &sysfs_journal_debug,
 650         &sysfs_btree_updates,
 651         &sysfs_btree_cache,
 652         &sysfs_btree_key_cache,
 653         &sysfs_new_stripes,
 654         &sysfs_stripes_heap,
 655         &sysfs_open_buckets,
 656         &sysfs_open_buckets_partial,
 657         &sysfs_write_points,
 658 #ifdef BCH_WRITE_REF_DEBUG
 659         &sysfs_write_refs,
 660 #endif
 661         &sysfs_nocow_lock_table,
 662         &sysfs_io_timers_read,
 663         &sysfs_io_timers_write,
 664
 665         &sysfs_trigger_gc,
 666         &sysfs_trigger_discards,
 667         &sysfs_trigger_invalidates,
 668         &sysfs_prune_cache,
 669         &sysfs_btree_wakeup,
 670
 671         &sysfs_gc_gens_pos,
 672
 673         &sysfs_copy_gc_enabled,
 674         &sysfs_copy_gc_wait,
 675
 676         &sysfs_rebalance_enabled,
 677         &sysfs_rebalance_work,
 678         sysfs_pd_controller_files(rebalance),
 679
 680         &sysfs_moving_ctxts,
 681
 682         &sysfs_internal_uuid,
 683
 684         &sysfs_disk_groups,
 685         NULL
 686 };
 687
 688 /* options */
 689
 690 SHOW(bch2_fs_opts_dir)
 691 {
 692         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 693         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 694         int id = opt - bch2_opt_table;
 695         u64 v = bch2_opt_get_by_id(&c->opts, id);
 696
 697         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 698         prt_char(out, '\n');
 699
 700         return 0;
 701 }
 702
 703 STORE(bch2_fs_opts_dir)
 704 {
 705         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 706         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 707         int ret, id = opt - bch2_opt_table;
 708         char *tmp;
 709         u64 v;
 710
 711         /*
 712          * We don't need to take c->writes for correctness, but it eliminates an
 713          * unsightly error message in the dmesg log when we're RO:
 714          */
 715         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 716                 return -EROFS;
 717
 718         tmp = kstrdup(buf, GFP_KERNEL);
 719         if (!tmp) {
 720                 ret = -ENOMEM;
 721                 goto err;
 722         }
 723
 724         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 725         kfree(tmp);
 726
 727         if (ret < 0)
 728                 goto err;
 729
 730         ret = bch2_opt_check_may_set(c, id, v);
 731         if (ret < 0)
 732                 goto err;
 733
 734         bch2_opt_set_sb(c, opt, v);
 735         bch2_opt_set_by_id(&c->opts, id, v);
 736
 737         if ((id == Opt_background_target ||
 738              id == Opt_background_compression) && v) {
 739                 bch2_rebalance_add_work(c, S64_MAX);
 740                 rebalance_wakeup(c);
 741         }
 742
 743         ret = size;
 744 err:
 745         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 746         return ret;
 747 }
 748 SYSFS_OPS(bch2_fs_opts_dir);
 749
 750 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 751
 752 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 753 {
 754         const struct bch_option *i;
 755         int ret;
 756
 757         for (i = bch2_opt_table;
 758              i < bch2_opt_table + bch2_opts_nr;
 759              i++) {
 760                 if (!(i->flags & OPT_FS))
 761                         continue;
 762
 763                 ret = sysfs_create_file(kobj, &i->attr);
 764                 if (ret)
 765                         return ret;
 766         }
 767
 768         return 0;
 769 }
 770
 771 /* time stats */
 772
 773 SHOW(bch2_fs_time_stats)
 774 {
 775         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 776
 777 #define x(name)                                                         \
 778         if (attr == &sysfs_time_stat_##name)                            \
 779                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 780         BCH_TIME_STATS()
 781 #undef x
 782
 783         return 0;
 784 }
 785
 786 STORE(bch2_fs_time_stats)
 787 {
 788         return size;
 789 }
 790 SYSFS_OPS(bch2_fs_time_stats);
 791
 792 struct attribute *bch2_fs_time_stats_files[] = {
 793 #define x(name)                                         \
 794         &sysfs_time_stat_##name,
 795         BCH_TIME_STATS()
 796 #undef x
 797         NULL
 798 };
 799
 800 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 801 {
 802         struct bch_fs *c = ca->fs;
 803         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 804         unsigned i, nr[BCH_DATA_NR];
 805
 806         memset(nr, 0, sizeof(nr));
 807
 808         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 809                 nr[c->open_buckets[i].data_type]++;
 810
 811         printbuf_tabstop_push(out, 8);
 812         printbuf_tabstop_push(out, 16);
 813         printbuf_tabstop_push(out, 16);
 814         printbuf_tabstop_push(out, 16);
 815         printbuf_tabstop_push(out, 16);
 816
 817         prt_tab(out);
 818         prt_str(out, "buckets");
 819         prt_tab_rjust(out);
 820         prt_str(out, "sectors");
 821         prt_tab_rjust(out);
 822         prt_str(out, "fragmented");
 823         prt_tab_rjust(out);
 824         prt_newline(out);
 825
 826         for (i = 0; i < BCH_DATA_NR; i++) {
 827                 prt_str(out, bch2_data_types[i]);
 828                 prt_tab(out);
 829                 prt_u64(out, stats.d[i].buckets);
 830                 prt_tab_rjust(out);
 831                 prt_u64(out, stats.d[i].sectors);
 832                 prt_tab_rjust(out);
 833                 prt_u64(out, stats.d[i].fragmented);
 834                 prt_tab_rjust(out);
 835                 prt_newline(out);
 836         }
 837
 838         prt_str(out, "ec");
 839         prt_tab(out);
 840         prt_u64(out, stats.buckets_ec);
 841         prt_tab_rjust(out);
 842         prt_newline(out);
 843
 844         prt_newline(out);
 845
 846         prt_printf(out, "reserves:");
 847         prt_newline(out);
 848         for (i = 0; i < BCH_WATERMARK_NR; i++) {
 849                 prt_str(out, bch2_watermarks[i]);
 850                 prt_tab(out);
 851                 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
 852                 prt_tab_rjust(out);
 853                 prt_newline(out);
 854         }
 855
 856         prt_newline(out);
 857
 858         printbuf_tabstops_reset(out);
 859         printbuf_tabstop_push(out, 24);
 860
 861         prt_str(out, "freelist_wait");
 862         prt_tab(out);
 863         prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
 864         prt_newline(out);
 865
 866         prt_str(out, "open buckets allocated");
 867         prt_tab(out);
 868         prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
 869         prt_newline(out);
 870
 871         prt_str(out, "open buckets this dev");
 872         prt_tab(out);
 873         prt_u64(out, ca->nr_open_buckets);
 874         prt_newline(out);
 875
 876         prt_str(out, "open buckets total");
 877         prt_tab(out);
 878         prt_u64(out, OPEN_BUCKETS_COUNT);
 879         prt_newline(out);
 880
 881         prt_str(out, "open_buckets_wait");
 882         prt_tab(out);
 883         prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
 884         prt_newline(out);
 885
 886         prt_str(out, "open_buckets_btree");
 887         prt_tab(out);
 888         prt_u64(out, nr[BCH_DATA_btree]);
 889         prt_newline(out);
 890
 891         prt_str(out, "open_buckets_user");
 892         prt_tab(out);
 893         prt_u64(out, nr[BCH_DATA_user]);
 894         prt_newline(out);
 895
 896         prt_str(out, "buckets_to_invalidate");
 897         prt_tab(out);
 898         prt_u64(out, should_invalidate_buckets(ca, stats));
 899         prt_newline(out);
 900
 901         prt_str(out, "btree reserve cache");
 902         prt_tab(out);
 903         prt_u64(out, c->btree_reserve_cache_nr);
 904         prt_newline(out);
 905 }
 906
 907 static const char * const bch2_rw[] = {
 908         "read",
 909         "write",
 910         NULL
 911 };
 912
 913 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 914 {
 915         int rw, i;
 916
 917         for (rw = 0; rw < 2; rw++) {
 918                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 919
 920                 for (i = 1; i < BCH_DATA_NR; i++)
 921                         prt_printf(out, "%-12s:%12llu\n",
 922                                bch2_data_types[i],
 923                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 924         }
 925 }
 926
 927 SHOW(bch2_dev)
 928 {
 929         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 930         struct bch_fs *c = ca->fs;
 931
 932         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 933
 934         sysfs_print(bucket_size,        bucket_bytes(ca));
 935         sysfs_print(first_bucket,       ca->mi.first_bucket);
 936         sysfs_print(nbuckets,           ca->mi.nbuckets);
 937         sysfs_print(durability,         ca->mi.durability);
 938         sysfs_print(discard,            ca->mi.discard);
 939
 940         if (attr == &sysfs_label) {
 941                 if (ca->mi.group) {
 942                         mutex_lock(&c->sb_lock);
 943                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 944                                                ca->mi.group - 1);
 945                         mutex_unlock(&c->sb_lock);
 946                 }
 947
 948                 prt_char(out, '\n');
 949         }
 950
 951         if (attr == &sysfs_has_data) {
 952                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 953                 prt_char(out, '\n');
 954         }
 955
 956         if (attr == &sysfs_state_rw) {
 957                 prt_string_option(out, bch2_member_states, ca->mi.state);
 958                 prt_char(out, '\n');
 959         }
 960
 961         if (attr == &sysfs_iodone)
 962                 dev_iodone_to_text(out, ca);
 963
 964         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 965         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 966
 967         if (attr == &sysfs_io_latency_stats_read)
 968                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 969
 970         if (attr == &sysfs_io_latency_stats_write)
 971                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 972
 973         sysfs_printf(congested,                 "%u%%",
 974                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 975                      * 100 / CONGESTED_MAX);
 976
 977         if (attr == &sysfs_alloc_debug)
 978                 dev_alloc_debug_to_text(out, ca);
 979
 980         return 0;
 981 }
 982
 983 STORE(bch2_dev)
 984 {
 985         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 986         struct bch_fs *c = ca->fs;
 987         struct bch_member *mi;
 988
 989         if (attr == &sysfs_discard) {
 990                 bool v = strtoul_or_return(buf);
 991
 992                 mutex_lock(&c->sb_lock);
 993                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 994
 995                 if (v != BCH_MEMBER_DISCARD(mi)) {
 996                         SET_BCH_MEMBER_DISCARD(mi, v);
 997                         bch2_write_super(c);
 998                 }
 999                 mutex_unlock(&c->sb_lock);
1000         }
1001
1002         if (attr == &sysfs_durability) {
1003                 u64 v = strtoul_or_return(buf);
1004
1005                 mutex_lock(&c->sb_lock);
1006                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
1007
1008                 if (v != BCH_MEMBER_DURABILITY(mi)) {
1009                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
1010                         bch2_write_super(c);
1011                 }
1012                 mutex_unlock(&c->sb_lock);
1013         }
1014
1015         if (attr == &sysfs_label) {
1016                 char *tmp;
1017                 int ret;
1018
1019                 tmp = kstrdup(buf, GFP_KERNEL);
1020                 if (!tmp)
1021                         return -ENOMEM;
1022
1023                 ret = bch2_dev_group_set(c, ca, strim(tmp));
1024                 kfree(tmp);
1025                 if (ret)
1026                         return ret;
1027         }
1028
1029         return size;
1030 }
1031 SYSFS_OPS(bch2_dev);
1032
1033 struct attribute *bch2_dev_files[] = {
1034         &sysfs_uuid,
1035         &sysfs_bucket_size,
1036         &sysfs_first_bucket,
1037         &sysfs_nbuckets,
1038         &sysfs_durability,
1039
1040         /* settings: */
1041         &sysfs_discard,
1042         &sysfs_state_rw,
1043         &sysfs_label,
1044
1045         &sysfs_has_data,
1046         &sysfs_iodone,
1047
1048         &sysfs_io_latency_read,
1049         &sysfs_io_latency_write,
1050         &sysfs_io_latency_stats_read,
1051         &sysfs_io_latency_stats_write,
1052         &sysfs_congested,
1053
1054         /* debug: */
1055         &sysfs_alloc_debug,
1056         NULL
1057 };
1058
1059 #endif  /* _BCACHEFS_SYSFS_H_ */