fs/bcachefs/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 "compress.h"
  25 #include "disk_groups.h"
  26 #include "ec.h"
  27 #include "inode.h"
  28 #include "journal.h"
  29 #include "keylist.h"
  30 #include "move.h"
  31 #include "movinggc.h"
  32 #include "nocow_locking.h"
  33 #include "opts.h"
  34 #include "rebalance.h"
  35 #include "replicas.h"
  36 #include "super-io.h"
  37 #include "tests.h"
  38
  39 #include <linux/blkdev.h>
  40 #include <linux/sort.h>
  41 #include <linux/sched/clock.h>
  42
  43 #include "util.h"
  44
  45 #define SYSFS_OPS(type)                                                 \
  46 const struct sysfs_ops type ## _sysfs_ops = {                           \
  47         .show   = type ## _show,                                        \
  48         .store  = type ## _store                                        \
  49 }
  50
  51 #define SHOW(fn)                                                        \
  52 static ssize_t fn ## _to_text(struct printbuf *,                        \
  53                               struct kobject *, struct attribute *);    \
  54                                                                         \
  55 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  56                            char *buf)                                   \
  57 {                                                                       \
  58         struct printbuf out = PRINTBUF;                                 \
  59         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  60                                                                         \
  61         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  62                 prt_newline(&out);                                      \
  63                                                                         \
  64         if (!ret && out.allocation_failure)                             \
  65                 ret = -ENOMEM;                                          \
  66                                                                         \
  67         if (!ret) {                                                     \
  68                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  69                 memcpy(buf, out.buf, ret);                              \
  70         }                                                               \
  71         printbuf_exit(&out);                                            \
  72         return bch2_err_class(ret);                                     \
  73 }                                                                       \
  74                                                                         \
  75 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  76                               struct attribute *attr)
  77
  78 #define STORE(fn)                                                       \
  79 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
  80                             const char *, size_t);                      \
  81                                                                         \
  82 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  83                             const char *buf, size_t size)               \
  84 {                                                                       \
  85         return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
  86 }                                                                       \
  87                                                                         \
  88 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
  89                                   const char *buf, size_t size)
  90
  91 #define __sysfs_attribute(_name, _mode)                                 \
  92         static struct attribute sysfs_##_name =                         \
  93                 { .name = #_name, .mode = _mode }
  94
  95 #define write_attribute(n)      __sysfs_attribute(n, 0200)
  96 #define read_attribute(n)       __sysfs_attribute(n, 0444)
  97 #define rw_attribute(n)         __sysfs_attribute(n, 0644)
  98
  99 #define sysfs_printf(file, fmt, ...)                                    \
 100 do {                                                                    \
 101         if (attr == &sysfs_ ## file)                                    \
 102                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
 103 } while (0)
 104
 105 #define sysfs_print(file, var)                                          \
 106 do {                                                                    \
 107         if (attr == &sysfs_ ## file)                                    \
 108                 snprint(out, var);                                      \
 109 } while (0)
 110
 111 #define sysfs_hprint(file, val)                                         \
 112 do {                                                                    \
 113         if (attr == &sysfs_ ## file)                                    \
 114                 prt_human_readable_s64(out, val);                       \
 115 } while (0)
 116
 117 #define sysfs_strtoul(file, var)                                        \
 118 do {                                                                    \
 119         if (attr == &sysfs_ ## file)                                    \
 120                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 121 } while (0)
 122
 123 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 124 do {                                                                    \
 125         if (attr == &sysfs_ ## file)                                    \
 126                 return strtoul_safe_clamp(buf, var, min, max)           \
 127                         ?: (ssize_t) size;                              \
 128 } while (0)
 129
 130 #define strtoul_or_return(cp)                                           \
 131 ({                                                                      \
 132         unsigned long _v;                                               \
 133         int _r = kstrtoul(cp, 10, &_v);                                 \
 134         if (_r)                                                         \
 135                 return _r;                                              \
 136         _v;                                                             \
 137 })
 138
 139 write_attribute(trigger_gc);
 140 write_attribute(trigger_discards);
 141 write_attribute(trigger_invalidates);
 142 write_attribute(prune_cache);
 143 write_attribute(btree_wakeup);
 144 rw_attribute(btree_gc_periodic);
 145 rw_attribute(gc_gens_pos);
 146
 147 read_attribute(uuid);
 148 read_attribute(minor);
 149 read_attribute(flags);
 150 read_attribute(bucket_size);
 151 read_attribute(first_bucket);
 152 read_attribute(nbuckets);
 153 rw_attribute(durability);
 154 read_attribute(io_done);
 155 read_attribute(io_errors);
 156 write_attribute(io_errors_reset);
 157
 158 read_attribute(io_latency_read);
 159 read_attribute(io_latency_write);
 160 read_attribute(io_latency_stats_read);
 161 read_attribute(io_latency_stats_write);
 162 read_attribute(congested);
 163
 164 read_attribute(btree_write_stats);
 165
 166 read_attribute(btree_cache_size);
 167 read_attribute(compression_stats);
 168 read_attribute(journal_debug);
 169 read_attribute(btree_updates);
 170 read_attribute(btree_cache);
 171 read_attribute(btree_key_cache);
 172 read_attribute(stripes_heap);
 173 read_attribute(open_buckets);
 174 read_attribute(open_buckets_partial);
 175 read_attribute(write_points);
 176 read_attribute(nocow_lock_table);
 177
 178 #ifdef BCH_WRITE_REF_DEBUG
 179 read_attribute(write_refs);
 180
 181 static const char * const bch2_write_refs[] = {
 182 #define x(n)    #n,
 183         BCH_WRITE_REFS()
 184 #undef x
 185         NULL
 186 };
 187
 188 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 189 {
 190         bch2_printbuf_tabstop_push(out, 24);
 191
 192         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 193                 prt_str(out, bch2_write_refs[i]);
 194                 prt_tab(out);
 195                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 196                 prt_newline(out);
 197         }
 198 }
 199 #endif
 200
 201 read_attribute(internal_uuid);
 202 read_attribute(disk_groups);
 203
 204 read_attribute(has_data);
 205 read_attribute(alloc_debug);
 206
 207 #define x(t, n, ...) read_attribute(t);
 208 BCH_PERSISTENT_COUNTERS()
 209 #undef x
 210
 211 rw_attribute(discard);
 212 rw_attribute(label);
 213
 214 rw_attribute(copy_gc_enabled);
 215 read_attribute(copy_gc_wait);
 216
 217 rw_attribute(rebalance_enabled);
 218 sysfs_pd_controller_attribute(rebalance);
 219 read_attribute(rebalance_status);
 220 rw_attribute(promote_whole_extents);
 221
 222 read_attribute(new_stripes);
 223
 224 read_attribute(io_timers_read);
 225 read_attribute(io_timers_write);
 226
 227 read_attribute(moving_ctxts);
 228
 229 #ifdef CONFIG_BCACHEFS_TESTS
 230 write_attribute(perf_test);
 231 #endif /* CONFIG_BCACHEFS_TESTS */
 232
 233 #define x(_name)                                                \
 234         static struct attribute sysfs_time_stat_##_name =               \
 235                 { .name = #_name, .mode = 0444 };
 236         BCH_TIME_STATS()
 237 #undef x
 238
 239 static struct attribute sysfs_state_rw = {
 240         .name = "state",
 241         .mode =  0444,
 242 };
 243
 244 static size_t bch2_btree_cache_size(struct bch_fs *c)
 245 {
 246         size_t ret = 0;
 247         struct btree *b;
 248
 249         mutex_lock(&c->btree_cache.lock);
 250         list_for_each_entry(b, &c->btree_cache.live, list)
 251                 ret += btree_buf_bytes(b);
 252
 253         mutex_unlock(&c->btree_cache.lock);
 254         return ret;
 255 }
 256
 257 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 258 {
 259         struct btree_trans *trans;
 260         enum btree_id id;
 261         struct compression_type_stats {
 262                 u64             nr_extents;
 263                 u64             sectors_compressed;
 264                 u64             sectors_uncompressed;
 265         } s[BCH_COMPRESSION_TYPE_NR];
 266         u64 compressed_incompressible = 0;
 267         int ret = 0;
 268
 269         memset(s, 0, sizeof(s));
 270
 271         if (!test_bit(BCH_FS_started, &c->flags))
 272                 return -EPERM;
 273
 274         trans = bch2_trans_get(c);
 275
 276         for (id = 0; id < BTREE_ID_NR; id++) {
 277                 if (!btree_type_has_ptrs(id))
 278                         continue;
 279
 280                 ret = for_each_btree_key(trans, iter, id, POS_MIN,
 281                                          BTREE_ITER_ALL_SNAPSHOTS, k, ({
 282                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 283                         struct bch_extent_crc_unpacked crc;
 284                         const union bch_extent_entry *entry;
 285                         bool compressed = false, incompressible = false;
 286
 287                         bkey_for_each_crc(k.k, ptrs, crc, entry) {
 288                                 incompressible  |= crc.compression_type == BCH_COMPRESSION_TYPE_incompressible;
 289                                 compressed      |= crc_is_compressed(crc);
 290
 291                                 if (crc_is_compressed(crc)) {
 292                                         s[crc.compression_type].nr_extents++;
 293                                         s[crc.compression_type].sectors_compressed += crc.compressed_size;
 294                                         s[crc.compression_type].sectors_uncompressed += crc.uncompressed_size;
 295                                 }
 296                         }
 297
 298                         compressed_incompressible += compressed && incompressible;
 299
 300                         if (!compressed) {
 301                                 unsigned t = incompressible ? BCH_COMPRESSION_TYPE_incompressible : 0;
 302
 303                                 s[t].nr_extents++;
 304                                 s[t].sectors_compressed += k.k->size;
 305                                 s[t].sectors_uncompressed += k.k->size;
 306                         }
 307                         0;
 308                 }));
 309         }
 310
 311         bch2_trans_put(trans);
 312
 313         if (ret)
 314                 return ret;
 315
 316         prt_str(out, "type");
 317         printbuf_tabstop_push(out, 12);
 318         prt_tab(out);
 319
 320         prt_str(out, "compressed");
 321         printbuf_tabstop_push(out, 16);
 322         prt_tab_rjust(out);
 323
 324         prt_str(out, "uncompressed");
 325         printbuf_tabstop_push(out, 16);
 326         prt_tab_rjust(out);
 327
 328         prt_str(out, "average extent size");
 329         printbuf_tabstop_push(out, 24);
 330         prt_tab_rjust(out);
 331         prt_newline(out);
 332
 333         for (unsigned i = 0; i < ARRAY_SIZE(s); i++) {
 334                 bch2_prt_compression_type(out, i);
 335                 prt_tab(out);
 336
 337                 prt_human_readable_u64(out, s[i].sectors_compressed << 9);
 338                 prt_tab_rjust(out);
 339
 340                 prt_human_readable_u64(out, s[i].sectors_uncompressed << 9);
 341                 prt_tab_rjust(out);
 342
 343                 prt_human_readable_u64(out, s[i].nr_extents
 344                                        ? div_u64(s[i].sectors_uncompressed << 9, s[i].nr_extents)
 345                                        : 0);
 346                 prt_tab_rjust(out);
 347                 prt_newline(out);
 348         }
 349
 350         if (compressed_incompressible) {
 351                 prt_printf(out, "%llu compressed & incompressible extents", compressed_incompressible);
 352                 prt_newline(out);
 353         }
 354
 355         return 0;
 356 }
 357
 358 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 359 {
 360         prt_printf(out, "%s: ", bch2_btree_id_str(c->gc_gens_btree));
 361         bch2_bpos_to_text(out, c->gc_gens_pos);
 362         prt_printf(out, "\n");
 363 }
 364
 365 static void bch2_btree_wakeup_all(struct bch_fs *c)
 366 {
 367         struct btree_trans *trans;
 368
 369         seqmutex_lock(&c->btree_trans_lock);
 370         list_for_each_entry(trans, &c->btree_trans_list, list) {
 371                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 372
 373                 if (b)
 374                         six_lock_wakeup_all(&b->lock);
 375
 376         }
 377         seqmutex_unlock(&c->btree_trans_lock);
 378 }
 379
 380 SHOW(bch2_fs)
 381 {
 382         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 383
 384         sysfs_print(minor,                      c->minor);
 385         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 386
 387         if (attr == &sysfs_flags)
 388                 prt_bitflags(out, bch2_fs_flag_strs, c->flags);
 389
 390         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 391
 392         if (attr == &sysfs_btree_write_stats)
 393                 bch2_btree_write_stats_to_text(out, c);
 394
 395         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 396
 397         if (attr == &sysfs_gc_gens_pos)
 398                 bch2_gc_gens_pos_to_text(out, c);
 399
 400         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 401
 402         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 403         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 404
 405         if (attr == &sysfs_copy_gc_wait)
 406                 bch2_copygc_wait_to_text(out, c);
 407
 408         if (attr == &sysfs_rebalance_status)
 409                 bch2_rebalance_status_to_text(out, c);
 410
 411         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 412
 413         /* Debugging: */
 414
 415         if (attr == &sysfs_journal_debug)
 416                 bch2_journal_debug_to_text(out, &c->journal);
 417
 418         if (attr == &sysfs_btree_updates)
 419                 bch2_btree_updates_to_text(out, c);
 420
 421         if (attr == &sysfs_btree_cache)
 422                 bch2_btree_cache_to_text(out, c);
 423
 424         if (attr == &sysfs_btree_key_cache)
 425                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 426
 427         if (attr == &sysfs_stripes_heap)
 428                 bch2_stripes_heap_to_text(out, c);
 429
 430         if (attr == &sysfs_open_buckets)
 431                 bch2_open_buckets_to_text(out, c);
 432
 433         if (attr == &sysfs_open_buckets_partial)
 434                 bch2_open_buckets_partial_to_text(out, c);
 435
 436         if (attr == &sysfs_write_points)
 437                 bch2_write_points_to_text(out, c);
 438
 439         if (attr == &sysfs_compression_stats)
 440                 bch2_compression_stats_to_text(out, c);
 441
 442         if (attr == &sysfs_new_stripes)
 443                 bch2_new_stripes_to_text(out, c);
 444
 445         if (attr == &sysfs_io_timers_read)
 446                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 447
 448         if (attr == &sysfs_io_timers_write)
 449                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 450
 451         if (attr == &sysfs_moving_ctxts)
 452                 bch2_fs_moving_ctxts_to_text(out, c);
 453
 454 #ifdef BCH_WRITE_REF_DEBUG
 455         if (attr == &sysfs_write_refs)
 456                 bch2_write_refs_to_text(out, c);
 457 #endif
 458
 459         if (attr == &sysfs_nocow_lock_table)
 460                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 461
 462         if (attr == &sysfs_disk_groups)
 463                 bch2_disk_groups_to_text(out, c);
 464
 465         return 0;
 466 }
 467
 468 STORE(bch2_fs)
 469 {
 470         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 471
 472         if (attr == &sysfs_btree_gc_periodic) {
 473                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 474                         ?: (ssize_t) size;
 475
 476                 wake_up_process(c->gc_thread);
 477                 return ret;
 478         }
 479
 480         if (attr == &sysfs_copy_gc_enabled) {
 481                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 482                         ?: (ssize_t) size;
 483
 484                 if (c->copygc_thread)
 485                         wake_up_process(c->copygc_thread);
 486                 return ret;
 487         }
 488
 489         if (attr == &sysfs_rebalance_enabled) {
 490                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 491                         ?: (ssize_t) size;
 492
 493                 rebalance_wakeup(c);
 494                 return ret;
 495         }
 496
 497         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 498
 499         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 500
 501         /* Debugging: */
 502
 503         if (!test_bit(BCH_FS_started, &c->flags))
 504                 return -EPERM;
 505
 506         /* Debugging: */
 507
 508         if (!test_bit(BCH_FS_rw, &c->flags))
 509                 return -EROFS;
 510
 511         if (attr == &sysfs_prune_cache) {
 512                 struct shrink_control sc;
 513
 514                 sc.gfp_mask = GFP_KERNEL;
 515                 sc.nr_to_scan = strtoul_or_return(buf);
 516                 c->btree_cache.shrink->scan_objects(c->btree_cache.shrink, &sc);
 517         }
 518
 519         if (attr == &sysfs_btree_wakeup)
 520                 bch2_btree_wakeup_all(c);
 521
 522         if (attr == &sysfs_trigger_gc) {
 523                 /*
 524                  * Full gc is currently incompatible with btree key cache:
 525                  */
 526 #if 0
 527                 down_read(&c->state_lock);
 528                 bch2_gc(c, false, false);
 529                 up_read(&c->state_lock);
 530 #else
 531                 bch2_gc_gens(c);
 532 #endif
 533         }
 534
 535         if (attr == &sysfs_trigger_discards)
 536                 bch2_do_discards(c);
 537
 538         if (attr == &sysfs_trigger_invalidates)
 539                 bch2_do_invalidates(c);
 540
 541 #ifdef CONFIG_BCACHEFS_TESTS
 542         if (attr == &sysfs_perf_test) {
 543                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 544                 char *test              = strsep(&p, " \t\n");
 545                 char *nr_str            = strsep(&p, " \t\n");
 546                 char *threads_str       = strsep(&p, " \t\n");
 547                 unsigned threads;
 548                 u64 nr;
 549                 int ret = -EINVAL;
 550
 551                 if (threads_str &&
 552                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 553                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 554                         ret = bch2_btree_perf_test(c, test, nr, threads);
 555                 kfree(tmp);
 556
 557                 if (ret)
 558                         size = ret;
 559         }
 560 #endif
 561         return size;
 562 }
 563 SYSFS_OPS(bch2_fs);
 564
 565 struct attribute *bch2_fs_files[] = {
 566         &sysfs_minor,
 567         &sysfs_btree_cache_size,
 568         &sysfs_btree_write_stats,
 569
 570         &sysfs_promote_whole_extents,
 571
 572         &sysfs_compression_stats,
 573
 574 #ifdef CONFIG_BCACHEFS_TESTS
 575         &sysfs_perf_test,
 576 #endif
 577         NULL
 578 };
 579
 580 /* counters dir */
 581
 582 SHOW(bch2_fs_counters)
 583 {
 584         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 585         u64 counter = 0;
 586         u64 counter_since_mount = 0;
 587
 588         printbuf_tabstop_push(out, 32);
 589
 590         #define x(t, ...) \
 591                 if (attr == &sysfs_##t) {                                       \
 592                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 593                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 594                         prt_printf(out, "since mount:");                                \
 595                         prt_tab(out);                                           \
 596                         prt_human_readable_u64(out, counter_since_mount);       \
 597                         prt_newline(out);                                       \
 598                                                                                 \
 599                         prt_printf(out, "since filesystem creation:");          \
 600                         prt_tab(out);                                           \
 601                         prt_human_readable_u64(out, counter);                   \
 602                         prt_newline(out);                                       \
 603                 }
 604         BCH_PERSISTENT_COUNTERS()
 605         #undef x
 606         return 0;
 607 }
 608
 609 STORE(bch2_fs_counters) {
 610         return 0;
 611 }
 612
 613 SYSFS_OPS(bch2_fs_counters);
 614
 615 struct attribute *bch2_fs_counters_files[] = {
 616 #define x(t, ...) \
 617         &sysfs_##t,
 618         BCH_PERSISTENT_COUNTERS()
 619 #undef x
 620         NULL
 621 };
 622 /* internal dir - just a wrapper */
 623
 624 SHOW(bch2_fs_internal)
 625 {
 626         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 627
 628         return bch2_fs_to_text(out, &c->kobj, attr);
 629 }
 630
 631 STORE(bch2_fs_internal)
 632 {
 633         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 634
 635         return bch2_fs_store(&c->kobj, attr, buf, size);
 636 }
 637 SYSFS_OPS(bch2_fs_internal);
 638
 639 struct attribute *bch2_fs_internal_files[] = {
 640         &sysfs_flags,
 641         &sysfs_journal_debug,
 642         &sysfs_btree_updates,
 643         &sysfs_btree_cache,
 644         &sysfs_btree_key_cache,
 645         &sysfs_new_stripes,
 646         &sysfs_stripes_heap,
 647         &sysfs_open_buckets,
 648         &sysfs_open_buckets_partial,
 649         &sysfs_write_points,
 650 #ifdef BCH_WRITE_REF_DEBUG
 651         &sysfs_write_refs,
 652 #endif
 653         &sysfs_nocow_lock_table,
 654         &sysfs_io_timers_read,
 655         &sysfs_io_timers_write,
 656
 657         &sysfs_trigger_gc,
 658         &sysfs_trigger_discards,
 659         &sysfs_trigger_invalidates,
 660         &sysfs_prune_cache,
 661         &sysfs_btree_wakeup,
 662
 663         &sysfs_gc_gens_pos,
 664
 665         &sysfs_copy_gc_enabled,
 666         &sysfs_copy_gc_wait,
 667
 668         &sysfs_rebalance_enabled,
 669         &sysfs_rebalance_status,
 670         sysfs_pd_controller_files(rebalance),
 671
 672         &sysfs_moving_ctxts,
 673
 674         &sysfs_internal_uuid,
 675
 676         &sysfs_disk_groups,
 677         NULL
 678 };
 679
 680 /* options */
 681
 682 SHOW(bch2_fs_opts_dir)
 683 {
 684         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 685         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 686         int id = opt - bch2_opt_table;
 687         u64 v = bch2_opt_get_by_id(&c->opts, id);
 688
 689         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 690         prt_char(out, '\n');
 691
 692         return 0;
 693 }
 694
 695 STORE(bch2_fs_opts_dir)
 696 {
 697         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 698         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 699         int ret, id = opt - bch2_opt_table;
 700         char *tmp;
 701         u64 v;
 702
 703         /*
 704          * We don't need to take c->writes for correctness, but it eliminates an
 705          * unsightly error message in the dmesg log when we're RO:
 706          */
 707         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 708                 return -EROFS;
 709
 710         tmp = kstrdup(buf, GFP_KERNEL);
 711         if (!tmp) {
 712                 ret = -ENOMEM;
 713                 goto err;
 714         }
 715
 716         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 717         kfree(tmp);
 718
 719         if (ret < 0)
 720                 goto err;
 721
 722         ret = bch2_opt_check_may_set(c, id, v);
 723         if (ret < 0)
 724                 goto err;
 725
 726         bch2_opt_set_sb(c, opt, v);
 727         bch2_opt_set_by_id(&c->opts, id, v);
 728
 729         if (v &&
 730             (id == Opt_background_target ||
 731              id == Opt_background_compression ||
 732              (id == Opt_compression && !c->opts.background_compression)))
 733                 bch2_set_rebalance_needs_scan(c, 0);
 734
 735         ret = size;
 736 err:
 737         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 738         return ret;
 739 }
 740 SYSFS_OPS(bch2_fs_opts_dir);
 741
 742 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 743
 744 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 745 {
 746         const struct bch_option *i;
 747         int ret;
 748
 749         for (i = bch2_opt_table;
 750              i < bch2_opt_table + bch2_opts_nr;
 751              i++) {
 752                 if (!(i->flags & OPT_FS))
 753                         continue;
 754
 755                 ret = sysfs_create_file(kobj, &i->attr);
 756                 if (ret)
 757                         return ret;
 758         }
 759
 760         return 0;
 761 }
 762
 763 /* time stats */
 764
 765 SHOW(bch2_fs_time_stats)
 766 {
 767         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 768
 769 #define x(name)                                                         \
 770         if (attr == &sysfs_time_stat_##name)                            \
 771                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 772         BCH_TIME_STATS()
 773 #undef x
 774
 775         return 0;
 776 }
 777
 778 STORE(bch2_fs_time_stats)
 779 {
 780         return size;
 781 }
 782 SYSFS_OPS(bch2_fs_time_stats);
 783
 784 struct attribute *bch2_fs_time_stats_files[] = {
 785 #define x(name)                                         \
 786         &sysfs_time_stat_##name,
 787         BCH_TIME_STATS()
 788 #undef x
 789         NULL
 790 };
 791
 792 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 793 {
 794         struct bch_fs *c = ca->fs;
 795         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 796         unsigned i, nr[BCH_DATA_NR];
 797
 798         memset(nr, 0, sizeof(nr));
 799
 800         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 801                 nr[c->open_buckets[i].data_type]++;
 802
 803         printbuf_tabstop_push(out, 8);
 804         printbuf_tabstop_push(out, 16);
 805         printbuf_tabstop_push(out, 16);
 806         printbuf_tabstop_push(out, 16);
 807         printbuf_tabstop_push(out, 16);
 808
 809         bch2_dev_usage_to_text(out, &stats);
 810
 811         prt_newline(out);
 812
 813         prt_printf(out, "reserves:");
 814         prt_newline(out);
 815         for (i = 0; i < BCH_WATERMARK_NR; i++) {
 816                 prt_str(out, bch2_watermarks[i]);
 817                 prt_tab(out);
 818                 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
 819                 prt_tab_rjust(out);
 820                 prt_newline(out);
 821         }
 822
 823         prt_newline(out);
 824
 825         printbuf_tabstops_reset(out);
 826         printbuf_tabstop_push(out, 24);
 827
 828         prt_str(out, "freelist_wait");
 829         prt_tab(out);
 830         prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
 831         prt_newline(out);
 832
 833         prt_str(out, "open buckets allocated");
 834         prt_tab(out);
 835         prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
 836         prt_newline(out);
 837
 838         prt_str(out, "open buckets this dev");
 839         prt_tab(out);
 840         prt_u64(out, ca->nr_open_buckets);
 841         prt_newline(out);
 842
 843         prt_str(out, "open buckets total");
 844         prt_tab(out);
 845         prt_u64(out, OPEN_BUCKETS_COUNT);
 846         prt_newline(out);
 847
 848         prt_str(out, "open_buckets_wait");
 849         prt_tab(out);
 850         prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
 851         prt_newline(out);
 852
 853         prt_str(out, "open_buckets_btree");
 854         prt_tab(out);
 855         prt_u64(out, nr[BCH_DATA_btree]);
 856         prt_newline(out);
 857
 858         prt_str(out, "open_buckets_user");
 859         prt_tab(out);
 860         prt_u64(out, nr[BCH_DATA_user]);
 861         prt_newline(out);
 862
 863         prt_str(out, "buckets_to_invalidate");
 864         prt_tab(out);
 865         prt_u64(out, should_invalidate_buckets(ca, stats));
 866         prt_newline(out);
 867
 868         prt_str(out, "btree reserve cache");
 869         prt_tab(out);
 870         prt_u64(out, c->btree_reserve_cache_nr);
 871         prt_newline(out);
 872 }
 873
 874 static const char * const bch2_rw[] = {
 875         "read",
 876         "write",
 877         NULL
 878 };
 879
 880 static void dev_io_done_to_text(struct printbuf *out, struct bch_dev *ca)
 881 {
 882         int rw, i;
 883
 884         for (rw = 0; rw < 2; rw++) {
 885                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 886
 887                 for (i = 1; i < BCH_DATA_NR; i++)
 888                         prt_printf(out, "%-12s:%12llu\n",
 889                                bch2_data_type_str(i),
 890                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 891         }
 892 }
 893
 894 SHOW(bch2_dev)
 895 {
 896         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 897         struct bch_fs *c = ca->fs;
 898
 899         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 900
 901         sysfs_print(bucket_size,        bucket_bytes(ca));
 902         sysfs_print(first_bucket,       ca->mi.first_bucket);
 903         sysfs_print(nbuckets,           ca->mi.nbuckets);
 904         sysfs_print(durability,         ca->mi.durability);
 905         sysfs_print(discard,            ca->mi.discard);
 906
 907         if (attr == &sysfs_label) {
 908                 if (ca->mi.group)
 909                         bch2_disk_path_to_text(out, c, ca->mi.group - 1);
 910                 prt_char(out, '\n');
 911         }
 912
 913         if (attr == &sysfs_has_data) {
 914                 prt_bitflags(out, __bch2_data_types, bch2_dev_has_data(c, ca));
 915                 prt_char(out, '\n');
 916         }
 917
 918         if (attr == &sysfs_state_rw) {
 919                 prt_string_option(out, bch2_member_states, ca->mi.state);
 920                 prt_char(out, '\n');
 921         }
 922
 923         if (attr == &sysfs_io_done)
 924                 dev_io_done_to_text(out, ca);
 925
 926         if (attr == &sysfs_io_errors)
 927                 bch2_dev_io_errors_to_text(out, ca);
 928
 929         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 930         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 931
 932         if (attr == &sysfs_io_latency_stats_read)
 933                 bch2_time_stats_to_text(out, &ca->io_latency[READ].stats);
 934
 935         if (attr == &sysfs_io_latency_stats_write)
 936                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE].stats);
 937
 938         sysfs_printf(congested,                 "%u%%",
 939                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 940                      * 100 / CONGESTED_MAX);
 941
 942         if (attr == &sysfs_alloc_debug)
 943                 dev_alloc_debug_to_text(out, ca);
 944
 945         return 0;
 946 }
 947
 948 STORE(bch2_dev)
 949 {
 950         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 951         struct bch_fs *c = ca->fs;
 952         struct bch_member *mi;
 953
 954         if (attr == &sysfs_discard) {
 955                 bool v = strtoul_or_return(buf);
 956
 957                 mutex_lock(&c->sb_lock);
 958                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 959
 960                 if (v != BCH_MEMBER_DISCARD(mi)) {
 961                         SET_BCH_MEMBER_DISCARD(mi, v);
 962                         bch2_write_super(c);
 963                 }
 964                 mutex_unlock(&c->sb_lock);
 965         }
 966
 967         if (attr == &sysfs_durability) {
 968                 u64 v = strtoul_or_return(buf);
 969
 970                 mutex_lock(&c->sb_lock);
 971                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 972
 973                 if (v + 1 != BCH_MEMBER_DURABILITY(mi)) {
 974                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 975                         bch2_write_super(c);
 976                 }
 977                 mutex_unlock(&c->sb_lock);
 978         }
 979
 980         if (attr == &sysfs_label) {
 981                 char *tmp;
 982                 int ret;
 983
 984                 tmp = kstrdup(buf, GFP_KERNEL);
 985                 if (!tmp)
 986                         return -ENOMEM;
 987
 988                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 989                 kfree(tmp);
 990                 if (ret)
 991                         return ret;
 992         }
 993
 994         if (attr == &sysfs_io_errors_reset)
 995                 bch2_dev_errors_reset(ca);
 996
 997         return size;
 998 }
 999 SYSFS_OPS(bch2_dev);
1000
1001 struct attribute *bch2_dev_files[] = {
1002         &sysfs_uuid,
1003         &sysfs_bucket_size,
1004         &sysfs_first_bucket,
1005         &sysfs_nbuckets,
1006         &sysfs_durability,
1007
1008         /* settings: */
1009         &sysfs_discard,
1010         &sysfs_state_rw,
1011         &sysfs_label,
1012
1013         &sysfs_has_data,
1014         &sysfs_io_done,
1015         &sysfs_io_errors,
1016         &sysfs_io_errors_reset,
1017
1018         &sysfs_io_latency_read,
1019         &sysfs_io_latency_write,
1020         &sysfs_io_latency_stats_read,
1021         &sysfs_io_latency_stats_write,
1022         &sysfs_congested,
1023
1024         /* debug: */
1025         &sysfs_alloc_debug,
1026         NULL
1027 };
1028
1029 #endif  /* _BCACHEFS_SYSFS_H_ */