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 sysfs_strtoul(file, var)                                        \
 117 do {                                                                    \
 118         if (attr == &sysfs_ ## file)                                    \
 119                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 120 } while (0)
 121
 122 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 123 do {                                                                    \
 124         if (attr == &sysfs_ ## file)                                    \
 125                 return strtoul_safe_clamp(buf, var, min, max)           \
 126                         ?: (ssize_t) size;                              \
 127 } while (0)
 128
 129 #define strtoul_or_return(cp)                                           \
 130 ({                                                                      \
 131         unsigned long _v;                                               \
 132         int _r = kstrtoul(cp, 10, &_v);                                 \
 133         if (_r)                                                         \
 134                 return _r;                                              \
 135         _v;                                                             \
 136 })
 137
 138 write_attribute(trigger_gc);
 139 write_attribute(trigger_discards);
 140 write_attribute(trigger_invalidates);
 141 write_attribute(prune_cache);
 142 write_attribute(btree_wakeup);
 143 rw_attribute(btree_gc_periodic);
 144 rw_attribute(gc_gens_pos);
 145
 146 read_attribute(uuid);
 147 read_attribute(minor);
 148 read_attribute(bucket_size);
 149 read_attribute(first_bucket);
 150 read_attribute(nbuckets);
 151 rw_attribute(durability);
 152 read_attribute(io_done);
 153 read_attribute(io_errors);
 154 write_attribute(io_errors_reset);
 155
 156 read_attribute(io_latency_read);
 157 read_attribute(io_latency_write);
 158 read_attribute(io_latency_stats_read);
 159 read_attribute(io_latency_stats_write);
 160 read_attribute(congested);
 161
 162 read_attribute(btree_write_stats);
 163
 164 read_attribute(btree_cache_size);
 165 read_attribute(compression_stats);
 166 read_attribute(journal_debug);
 167 read_attribute(btree_updates);
 168 read_attribute(btree_cache);
 169 read_attribute(btree_key_cache);
 170 read_attribute(stripes_heap);
 171 read_attribute(open_buckets);
 172 read_attribute(open_buckets_partial);
 173 read_attribute(write_points);
 174 read_attribute(nocow_lock_table);
 175
 176 #ifdef BCH_WRITE_REF_DEBUG
 177 read_attribute(write_refs);
 178
 179 static const char * const bch2_write_refs[] = {
 180 #define x(n)    #n,
 181         BCH_WRITE_REFS()
 182 #undef x
 183         NULL
 184 };
 185
 186 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 187 {
 188         bch2_printbuf_tabstop_push(out, 24);
 189
 190         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 191                 prt_str(out, bch2_write_refs[i]);
 192                 prt_tab(out);
 193                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 194                 prt_newline(out);
 195         }
 196 }
 197 #endif
 198
 199 read_attribute(internal_uuid);
 200 read_attribute(disk_groups);
 201
 202 read_attribute(has_data);
 203 read_attribute(alloc_debug);
 204
 205 #define x(t, n, ...) read_attribute(t);
 206 BCH_PERSISTENT_COUNTERS()
 207 #undef x
 208
 209 rw_attribute(discard);
 210 rw_attribute(label);
 211
 212 rw_attribute(copy_gc_enabled);
 213 read_attribute(copy_gc_wait);
 214
 215 rw_attribute(rebalance_enabled);
 216 sysfs_pd_controller_attribute(rebalance);
 217 read_attribute(rebalance_status);
 218 rw_attribute(promote_whole_extents);
 219
 220 read_attribute(new_stripes);
 221
 222 read_attribute(io_timers_read);
 223 read_attribute(io_timers_write);
 224
 225 read_attribute(moving_ctxts);
 226
 227 #ifdef CONFIG_BCACHEFS_TESTS
 228 write_attribute(perf_test);
 229 #endif /* CONFIG_BCACHEFS_TESTS */
 230
 231 #define x(_name)                                                \
 232         static struct attribute sysfs_time_stat_##_name =               \
 233                 { .name = #_name, .mode = 0444 };
 234         BCH_TIME_STATS()
 235 #undef x
 236
 237 static struct attribute sysfs_state_rw = {
 238         .name = "state",
 239         .mode =  0444,
 240 };
 241
 242 static size_t bch2_btree_cache_size(struct bch_fs *c)
 243 {
 244         size_t ret = 0;
 245         struct btree *b;
 246
 247         mutex_lock(&c->btree_cache.lock);
 248         list_for_each_entry(b, &c->btree_cache.live, list)
 249                 ret += btree_bytes(c);
 250
 251         mutex_unlock(&c->btree_cache.lock);
 252         return ret;
 253 }
 254
 255 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 256 {
 257         struct btree_trans *trans;
 258         struct btree_iter iter;
 259         struct bkey_s_c k;
 260         enum btree_id id;
 261         u64 nr_uncompressed_extents = 0,
 262             nr_compressed_extents = 0,
 263             nr_incompressible_extents = 0,
 264             uncompressed_sectors = 0,
 265             incompressible_sectors = 0,
 266             compressed_sectors_compressed = 0,
 267             compressed_sectors_uncompressed = 0;
 268         int ret = 0;
 269
 270         if (!test_bit(BCH_FS_STARTED, &c->flags))
 271                 return -EPERM;
 272
 273         trans = bch2_trans_get(c);
 274
 275         for (id = 0; id < BTREE_ID_NR; id++) {
 276                 if (!btree_type_has_ptrs(id))
 277                         continue;
 278
 279                 for_each_btree_key(trans, iter, id, POS_MIN,
 280                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 281                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 282                         const union bch_extent_entry *entry;
 283                         struct extent_ptr_decoded p;
 284                         bool compressed = false, uncompressed = false, incompressible = false;
 285
 286                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 287                                 switch (p.crc.compression_type) {
 288                                 case BCH_COMPRESSION_TYPE_none:
 289                                         uncompressed = true;
 290                                         uncompressed_sectors += k.k->size;
 291                                         break;
 292                                 case BCH_COMPRESSION_TYPE_incompressible:
 293                                         incompressible = true;
 294                                         incompressible_sectors += k.k->size;
 295                                         break;
 296                                 default:
 297                                         compressed_sectors_compressed +=
 298                                                 p.crc.compressed_size;
 299                                         compressed_sectors_uncompressed +=
 300                                                 p.crc.uncompressed_size;
 301                                         compressed = true;
 302                                         break;
 303                                 }
 304                         }
 305
 306                         if (incompressible)
 307                                 nr_incompressible_extents++;
 308                         else if (uncompressed)
 309                                 nr_uncompressed_extents++;
 310                         else if (compressed)
 311                                 nr_compressed_extents++;
 312                 }
 313                 bch2_trans_iter_exit(trans, &iter);
 314         }
 315
 316         bch2_trans_put(trans);
 317
 318         if (ret)
 319                 return ret;
 320
 321         prt_printf(out, "uncompressed:\n");
 322         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 323         prt_printf(out, "       size:                   ");
 324         prt_human_readable_u64(out, uncompressed_sectors << 9);
 325         prt_printf(out, "\n");
 326
 327         prt_printf(out, "compressed:\n");
 328         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 329         prt_printf(out, "       compressed size:        ");
 330         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 331         prt_printf(out, "\n");
 332         prt_printf(out, "       uncompressed size:      ");
 333         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 334         prt_printf(out, "\n");
 335
 336         prt_printf(out, "incompressible:\n");
 337         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 338         prt_printf(out, "       size:                   ");
 339         prt_human_readable_u64(out, incompressible_sectors << 9);
 340         prt_printf(out, "\n");
 341         return 0;
 342 }
 343
 344 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 345 {
 346         prt_printf(out, "%s: ", bch2_btree_id_str(c->gc_gens_btree));
 347         bch2_bpos_to_text(out, c->gc_gens_pos);
 348         prt_printf(out, "\n");
 349 }
 350
 351 static void bch2_btree_wakeup_all(struct bch_fs *c)
 352 {
 353         struct btree_trans *trans;
 354
 355         seqmutex_lock(&c->btree_trans_lock);
 356         list_for_each_entry(trans, &c->btree_trans_list, list) {
 357                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 358
 359                 if (b)
 360                         six_lock_wakeup_all(&b->lock);
 361
 362         }
 363         seqmutex_unlock(&c->btree_trans_lock);
 364 }
 365
 366 SHOW(bch2_fs)
 367 {
 368         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 369
 370         sysfs_print(minor,                      c->minor);
 371         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 372
 373         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 374
 375         if (attr == &sysfs_btree_write_stats)
 376                 bch2_btree_write_stats_to_text(out, c);
 377
 378         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 379
 380         if (attr == &sysfs_gc_gens_pos)
 381                 bch2_gc_gens_pos_to_text(out, c);
 382
 383         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 384
 385         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 386         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 387
 388         if (attr == &sysfs_copy_gc_wait)
 389                 bch2_copygc_wait_to_text(out, c);
 390
 391         if (attr == &sysfs_rebalance_status)
 392                 bch2_rebalance_status_to_text(out, c);
 393
 394         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 395
 396         /* Debugging: */
 397
 398         if (attr == &sysfs_journal_debug)
 399                 bch2_journal_debug_to_text(out, &c->journal);
 400
 401         if (attr == &sysfs_btree_updates)
 402                 bch2_btree_updates_to_text(out, c);
 403
 404         if (attr == &sysfs_btree_cache)
 405                 bch2_btree_cache_to_text(out, &c->btree_cache);
 406
 407         if (attr == &sysfs_btree_key_cache)
 408                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 409
 410         if (attr == &sysfs_stripes_heap)
 411                 bch2_stripes_heap_to_text(out, c);
 412
 413         if (attr == &sysfs_open_buckets)
 414                 bch2_open_buckets_to_text(out, c);
 415
 416         if (attr == &sysfs_open_buckets_partial)
 417                 bch2_open_buckets_partial_to_text(out, c);
 418
 419         if (attr == &sysfs_write_points)
 420                 bch2_write_points_to_text(out, c);
 421
 422         if (attr == &sysfs_compression_stats)
 423                 bch2_compression_stats_to_text(out, c);
 424
 425         if (attr == &sysfs_new_stripes)
 426                 bch2_new_stripes_to_text(out, c);
 427
 428         if (attr == &sysfs_io_timers_read)
 429                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 430
 431         if (attr == &sysfs_io_timers_write)
 432                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 433
 434         if (attr == &sysfs_moving_ctxts)
 435                 bch2_fs_moving_ctxts_to_text(out, c);
 436
 437 #ifdef BCH_WRITE_REF_DEBUG
 438         if (attr == &sysfs_write_refs)
 439                 bch2_write_refs_to_text(out, c);
 440 #endif
 441
 442         if (attr == &sysfs_nocow_lock_table)
 443                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 444
 445         if (attr == &sysfs_disk_groups)
 446                 bch2_disk_groups_to_text(out, c);
 447
 448         return 0;
 449 }
 450
 451 STORE(bch2_fs)
 452 {
 453         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 454
 455         if (attr == &sysfs_btree_gc_periodic) {
 456                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 457                         ?: (ssize_t) size;
 458
 459                 wake_up_process(c->gc_thread);
 460                 return ret;
 461         }
 462
 463         if (attr == &sysfs_copy_gc_enabled) {
 464                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 465                         ?: (ssize_t) size;
 466
 467                 if (c->copygc_thread)
 468                         wake_up_process(c->copygc_thread);
 469                 return ret;
 470         }
 471
 472         if (attr == &sysfs_rebalance_enabled) {
 473                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 474                         ?: (ssize_t) size;
 475
 476                 rebalance_wakeup(c);
 477                 return ret;
 478         }
 479
 480         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 481
 482         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 483
 484         /* Debugging: */
 485
 486         if (!test_bit(BCH_FS_STARTED, &c->flags))
 487                 return -EPERM;
 488
 489         /* Debugging: */
 490
 491         if (!test_bit(BCH_FS_RW, &c->flags))
 492                 return -EROFS;
 493
 494         if (attr == &sysfs_prune_cache) {
 495                 struct shrink_control sc;
 496
 497                 sc.gfp_mask = GFP_KERNEL;
 498                 sc.nr_to_scan = strtoul_or_return(buf);
 499                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 500         }
 501
 502         if (attr == &sysfs_btree_wakeup)
 503                 bch2_btree_wakeup_all(c);
 504
 505         if (attr == &sysfs_trigger_gc) {
 506                 /*
 507                  * Full gc is currently incompatible with btree key cache:
 508                  */
 509 #if 0
 510                 down_read(&c->state_lock);
 511                 bch2_gc(c, false, false);
 512                 up_read(&c->state_lock);
 513 #else
 514                 bch2_gc_gens(c);
 515 #endif
 516         }
 517
 518         if (attr == &sysfs_trigger_discards)
 519                 bch2_do_discards(c);
 520
 521         if (attr == &sysfs_trigger_invalidates)
 522                 bch2_do_invalidates(c);
 523
 524 #ifdef CONFIG_BCACHEFS_TESTS
 525         if (attr == &sysfs_perf_test) {
 526                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 527                 char *test              = strsep(&p, " \t\n");
 528                 char *nr_str            = strsep(&p, " \t\n");
 529                 char *threads_str       = strsep(&p, " \t\n");
 530                 unsigned threads;
 531                 u64 nr;
 532                 int ret = -EINVAL;
 533
 534                 if (threads_str &&
 535                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 536                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 537                         ret = bch2_btree_perf_test(c, test, nr, threads);
 538                 kfree(tmp);
 539
 540                 if (ret)
 541                         size = ret;
 542         }
 543 #endif
 544         return size;
 545 }
 546 SYSFS_OPS(bch2_fs);
 547
 548 struct attribute *bch2_fs_files[] = {
 549         &sysfs_minor,
 550         &sysfs_btree_cache_size,
 551         &sysfs_btree_write_stats,
 552
 553         &sysfs_promote_whole_extents,
 554
 555         &sysfs_compression_stats,
 556
 557 #ifdef CONFIG_BCACHEFS_TESTS
 558         &sysfs_perf_test,
 559 #endif
 560         NULL
 561 };
 562
 563 /* counters dir */
 564
 565 SHOW(bch2_fs_counters)
 566 {
 567         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 568         u64 counter = 0;
 569         u64 counter_since_mount = 0;
 570
 571         printbuf_tabstop_push(out, 32);
 572
 573         #define x(t, ...) \
 574                 if (attr == &sysfs_##t) {                                       \
 575                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 576                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 577                         prt_printf(out, "since mount:");                                \
 578                         prt_tab(out);                                           \
 579                         prt_human_readable_u64(out, counter_since_mount);       \
 580                         prt_newline(out);                                       \
 581                                                                                 \
 582                         prt_printf(out, "since filesystem creation:");          \
 583                         prt_tab(out);                                           \
 584                         prt_human_readable_u64(out, counter);                   \
 585                         prt_newline(out);                                       \
 586                 }
 587         BCH_PERSISTENT_COUNTERS()
 588         #undef x
 589         return 0;
 590 }
 591
 592 STORE(bch2_fs_counters) {
 593         return 0;
 594 }
 595
 596 SYSFS_OPS(bch2_fs_counters);
 597
 598 struct attribute *bch2_fs_counters_files[] = {
 599 #define x(t, ...) \
 600         &sysfs_##t,
 601         BCH_PERSISTENT_COUNTERS()
 602 #undef x
 603         NULL
 604 };
 605 /* internal dir - just a wrapper */
 606
 607 SHOW(bch2_fs_internal)
 608 {
 609         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 610
 611         return bch2_fs_to_text(out, &c->kobj, attr);
 612 }
 613
 614 STORE(bch2_fs_internal)
 615 {
 616         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 617
 618         return bch2_fs_store(&c->kobj, attr, buf, size);
 619 }
 620 SYSFS_OPS(bch2_fs_internal);
 621
 622 struct attribute *bch2_fs_internal_files[] = {
 623         &sysfs_journal_debug,
 624         &sysfs_btree_updates,
 625         &sysfs_btree_cache,
 626         &sysfs_btree_key_cache,
 627         &sysfs_new_stripes,
 628         &sysfs_stripes_heap,
 629         &sysfs_open_buckets,
 630         &sysfs_open_buckets_partial,
 631         &sysfs_write_points,
 632 #ifdef BCH_WRITE_REF_DEBUG
 633         &sysfs_write_refs,
 634 #endif
 635         &sysfs_nocow_lock_table,
 636         &sysfs_io_timers_read,
 637         &sysfs_io_timers_write,
 638
 639         &sysfs_trigger_gc,
 640         &sysfs_trigger_discards,
 641         &sysfs_trigger_invalidates,
 642         &sysfs_prune_cache,
 643         &sysfs_btree_wakeup,
 644
 645         &sysfs_gc_gens_pos,
 646
 647         &sysfs_copy_gc_enabled,
 648         &sysfs_copy_gc_wait,
 649
 650         &sysfs_rebalance_enabled,
 651         &sysfs_rebalance_status,
 652         sysfs_pd_controller_files(rebalance),
 653
 654         &sysfs_moving_ctxts,
 655
 656         &sysfs_internal_uuid,
 657
 658         &sysfs_disk_groups,
 659         NULL
 660 };
 661
 662 /* options */
 663
 664 SHOW(bch2_fs_opts_dir)
 665 {
 666         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 667         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 668         int id = opt - bch2_opt_table;
 669         u64 v = bch2_opt_get_by_id(&c->opts, id);
 670
 671         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 672         prt_char(out, '\n');
 673
 674         return 0;
 675 }
 676
 677 STORE(bch2_fs_opts_dir)
 678 {
 679         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 680         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 681         int ret, id = opt - bch2_opt_table;
 682         char *tmp;
 683         u64 v;
 684
 685         /*
 686          * We don't need to take c->writes for correctness, but it eliminates an
 687          * unsightly error message in the dmesg log when we're RO:
 688          */
 689         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 690                 return -EROFS;
 691
 692         tmp = kstrdup(buf, GFP_KERNEL);
 693         if (!tmp) {
 694                 ret = -ENOMEM;
 695                 goto err;
 696         }
 697
 698         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 699         kfree(tmp);
 700
 701         if (ret < 0)
 702                 goto err;
 703
 704         ret = bch2_opt_check_may_set(c, id, v);
 705         if (ret < 0)
 706                 goto err;
 707
 708         bch2_opt_set_sb(c, opt, v);
 709         bch2_opt_set_by_id(&c->opts, id, v);
 710
 711         if ((id == Opt_background_target ||
 712              id == Opt_background_compression) && v)
 713                 bch2_set_rebalance_needs_scan(c, 0);
 714
 715         ret = size;
 716 err:
 717         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 718         return ret;
 719 }
 720 SYSFS_OPS(bch2_fs_opts_dir);
 721
 722 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 723
 724 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 725 {
 726         const struct bch_option *i;
 727         int ret;
 728
 729         for (i = bch2_opt_table;
 730              i < bch2_opt_table + bch2_opts_nr;
 731              i++) {
 732                 if (!(i->flags & OPT_FS))
 733                         continue;
 734
 735                 ret = sysfs_create_file(kobj, &i->attr);
 736                 if (ret)
 737                         return ret;
 738         }
 739
 740         return 0;
 741 }
 742
 743 /* time stats */
 744
 745 SHOW(bch2_fs_time_stats)
 746 {
 747         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 748
 749 #define x(name)                                                         \
 750         if (attr == &sysfs_time_stat_##name)                            \
 751                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 752         BCH_TIME_STATS()
 753 #undef x
 754
 755         return 0;
 756 }
 757
 758 STORE(bch2_fs_time_stats)
 759 {
 760         return size;
 761 }
 762 SYSFS_OPS(bch2_fs_time_stats);
 763
 764 struct attribute *bch2_fs_time_stats_files[] = {
 765 #define x(name)                                         \
 766         &sysfs_time_stat_##name,
 767         BCH_TIME_STATS()
 768 #undef x
 769         NULL
 770 };
 771
 772 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 773 {
 774         struct bch_fs *c = ca->fs;
 775         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 776         unsigned i, nr[BCH_DATA_NR];
 777
 778         memset(nr, 0, sizeof(nr));
 779
 780         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 781                 nr[c->open_buckets[i].data_type]++;
 782
 783         printbuf_tabstop_push(out, 8);
 784         printbuf_tabstop_push(out, 16);
 785         printbuf_tabstop_push(out, 16);
 786         printbuf_tabstop_push(out, 16);
 787         printbuf_tabstop_push(out, 16);
 788
 789         prt_tab(out);
 790         prt_str(out, "buckets");
 791         prt_tab_rjust(out);
 792         prt_str(out, "sectors");
 793         prt_tab_rjust(out);
 794         prt_str(out, "fragmented");
 795         prt_tab_rjust(out);
 796         prt_newline(out);
 797
 798         for (i = 0; i < BCH_DATA_NR; i++) {
 799                 prt_str(out, bch2_data_types[i]);
 800                 prt_tab(out);
 801                 prt_u64(out, stats.d[i].buckets);
 802                 prt_tab_rjust(out);
 803                 prt_u64(out, stats.d[i].sectors);
 804                 prt_tab_rjust(out);
 805                 prt_u64(out, stats.d[i].fragmented);
 806                 prt_tab_rjust(out);
 807                 prt_newline(out);
 808         }
 809
 810         prt_str(out, "ec");
 811         prt_tab(out);
 812         prt_u64(out, stats.buckets_ec);
 813         prt_tab_rjust(out);
 814         prt_newline(out);
 815
 816         prt_newline(out);
 817
 818         prt_printf(out, "reserves:");
 819         prt_newline(out);
 820         for (i = 0; i < BCH_WATERMARK_NR; i++) {
 821                 prt_str(out, bch2_watermarks[i]);
 822                 prt_tab(out);
 823                 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
 824                 prt_tab_rjust(out);
 825                 prt_newline(out);
 826         }
 827
 828         prt_newline(out);
 829
 830         printbuf_tabstops_reset(out);
 831         printbuf_tabstop_push(out, 24);
 832
 833         prt_str(out, "freelist_wait");
 834         prt_tab(out);
 835         prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
 836         prt_newline(out);
 837
 838         prt_str(out, "open buckets allocated");
 839         prt_tab(out);
 840         prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
 841         prt_newline(out);
 842
 843         prt_str(out, "open buckets this dev");
 844         prt_tab(out);
 845         prt_u64(out, ca->nr_open_buckets);
 846         prt_newline(out);
 847
 848         prt_str(out, "open buckets total");
 849         prt_tab(out);
 850         prt_u64(out, OPEN_BUCKETS_COUNT);
 851         prt_newline(out);
 852
 853         prt_str(out, "open_buckets_wait");
 854         prt_tab(out);
 855         prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
 856         prt_newline(out);
 857
 858         prt_str(out, "open_buckets_btree");
 859         prt_tab(out);
 860         prt_u64(out, nr[BCH_DATA_btree]);
 861         prt_newline(out);
 862
 863         prt_str(out, "open_buckets_user");
 864         prt_tab(out);
 865         prt_u64(out, nr[BCH_DATA_user]);
 866         prt_newline(out);
 867
 868         prt_str(out, "buckets_to_invalidate");
 869         prt_tab(out);
 870         prt_u64(out, should_invalidate_buckets(ca, stats));
 871         prt_newline(out);
 872
 873         prt_str(out, "btree reserve cache");
 874         prt_tab(out);
 875         prt_u64(out, c->btree_reserve_cache_nr);
 876         prt_newline(out);
 877 }
 878
 879 static const char * const bch2_rw[] = {
 880         "read",
 881         "write",
 882         NULL
 883 };
 884
 885 static void dev_io_done_to_text(struct printbuf *out, struct bch_dev *ca)
 886 {
 887         int rw, i;
 888
 889         for (rw = 0; rw < 2; rw++) {
 890                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 891
 892                 for (i = 1; i < BCH_DATA_NR; i++)
 893                         prt_printf(out, "%-12s:%12llu\n",
 894                                bch2_data_types[i],
 895                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 896         }
 897 }
 898
 899 SHOW(bch2_dev)
 900 {
 901         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 902         struct bch_fs *c = ca->fs;
 903
 904         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 905
 906         sysfs_print(bucket_size,        bucket_bytes(ca));
 907         sysfs_print(first_bucket,       ca->mi.first_bucket);
 908         sysfs_print(nbuckets,           ca->mi.nbuckets);
 909         sysfs_print(durability,         ca->mi.durability);
 910         sysfs_print(discard,            ca->mi.discard);
 911
 912         if (attr == &sysfs_label) {
 913                 if (ca->mi.group)
 914                         bch2_disk_path_to_text(out, c, ca->mi.group - 1);
 915                 prt_char(out, '\n');
 916         }
 917
 918         if (attr == &sysfs_has_data) {
 919                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 920                 prt_char(out, '\n');
 921         }
 922
 923         if (attr == &sysfs_state_rw) {
 924                 prt_string_option(out, bch2_member_states, ca->mi.state);
 925                 prt_char(out, '\n');
 926         }
 927
 928         if (attr == &sysfs_io_done)
 929                 dev_io_done_to_text(out, ca);
 930
 931         if (attr == &sysfs_io_errors)
 932                 bch2_dev_io_errors_to_text(out, ca);
 933
 934         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 935         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 936
 937         if (attr == &sysfs_io_latency_stats_read)
 938                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 939
 940         if (attr == &sysfs_io_latency_stats_write)
 941                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 942
 943         sysfs_printf(congested,                 "%u%%",
 944                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 945                      * 100 / CONGESTED_MAX);
 946
 947         if (attr == &sysfs_alloc_debug)
 948                 dev_alloc_debug_to_text(out, ca);
 949
 950         return 0;
 951 }
 952
 953 STORE(bch2_dev)
 954 {
 955         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 956         struct bch_fs *c = ca->fs;
 957         struct bch_member *mi;
 958
 959         if (attr == &sysfs_discard) {
 960                 bool v = strtoul_or_return(buf);
 961
 962                 mutex_lock(&c->sb_lock);
 963                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 964
 965                 if (v != BCH_MEMBER_DISCARD(mi)) {
 966                         SET_BCH_MEMBER_DISCARD(mi, v);
 967                         bch2_write_super(c);
 968                 }
 969                 mutex_unlock(&c->sb_lock);
 970         }
 971
 972         if (attr == &sysfs_durability) {
 973                 u64 v = strtoul_or_return(buf);
 974
 975                 mutex_lock(&c->sb_lock);
 976                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 977
 978                 if (v + 1 != BCH_MEMBER_DURABILITY(mi)) {
 979                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 980                         bch2_write_super(c);
 981                 }
 982                 mutex_unlock(&c->sb_lock);
 983         }
 984
 985         if (attr == &sysfs_label) {
 986                 char *tmp;
 987                 int ret;
 988
 989                 tmp = kstrdup(buf, GFP_KERNEL);
 990                 if (!tmp)
 991                         return -ENOMEM;
 992
 993                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 994                 kfree(tmp);
 995                 if (ret)
 996                         return ret;
 997         }
 998
 999         if (attr == &sysfs_io_errors_reset)
1000                 bch2_dev_errors_reset(ca);
1001
1002         return size;
1003 }
1004 SYSFS_OPS(bch2_dev);
1005
1006 struct attribute *bch2_dev_files[] = {
1007         &sysfs_uuid,
1008         &sysfs_bucket_size,
1009         &sysfs_first_bucket,
1010         &sysfs_nbuckets,
1011         &sysfs_durability,
1012
1013         /* settings: */
1014         &sysfs_discard,
1015         &sysfs_state_rw,
1016         &sysfs_label,
1017
1018         &sysfs_has_data,
1019         &sysfs_io_done,
1020         &sysfs_io_errors,
1021         &sysfs_io_errors_reset,
1022
1023         &sysfs_io_latency_read,
1024         &sysfs_io_latency_write,
1025         &sysfs_io_latency_stats_read,
1026         &sysfs_io_latency_stats_write,
1027         &sysfs_congested,
1028
1029         /* debug: */
1030         &sysfs_alloc_debug,
1031         NULL
1032 };
1033
1034 #endif  /* _BCACHEFS_SYSFS_H_ */