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(flags);
 149 read_attribute(bucket_size);
 150 read_attribute(first_bucket);
 151 read_attribute(nbuckets);
 152 rw_attribute(durability);
 153 read_attribute(io_done);
 154 read_attribute(io_errors);
 155 write_attribute(io_errors_reset);
 156
 157 read_attribute(io_latency_read);
 158 read_attribute(io_latency_write);
 159 read_attribute(io_latency_stats_read);
 160 read_attribute(io_latency_stats_write);
 161 read_attribute(congested);
 162
 163 read_attribute(btree_write_stats);
 164
 165 read_attribute(btree_cache_size);
 166 read_attribute(compression_stats);
 167 read_attribute(journal_debug);
 168 read_attribute(btree_updates);
 169 read_attribute(btree_cache);
 170 read_attribute(btree_key_cache);
 171 read_attribute(stripes_heap);
 172 read_attribute(open_buckets);
 173 read_attribute(open_buckets_partial);
 174 read_attribute(write_points);
 175 read_attribute(nocow_lock_table);
 176
 177 #ifdef BCH_WRITE_REF_DEBUG
 178 read_attribute(write_refs);
 179
 180 static const char * const bch2_write_refs[] = {
 181 #define x(n)    #n,
 182         BCH_WRITE_REFS()
 183 #undef x
 184         NULL
 185 };
 186
 187 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 188 {
 189         bch2_printbuf_tabstop_push(out, 24);
 190
 191         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 192                 prt_str(out, bch2_write_refs[i]);
 193                 prt_tab(out);
 194                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 195                 prt_newline(out);
 196         }
 197 }
 198 #endif
 199
 200 read_attribute(internal_uuid);
 201 read_attribute(disk_groups);
 202
 203 read_attribute(has_data);
 204 read_attribute(alloc_debug);
 205
 206 #define x(t, n, ...) read_attribute(t);
 207 BCH_PERSISTENT_COUNTERS()
 208 #undef x
 209
 210 rw_attribute(discard);
 211 rw_attribute(label);
 212
 213 rw_attribute(copy_gc_enabled);
 214 read_attribute(copy_gc_wait);
 215
 216 rw_attribute(rebalance_enabled);
 217 sysfs_pd_controller_attribute(rebalance);
 218 read_attribute(rebalance_status);
 219 rw_attribute(promote_whole_extents);
 220
 221 read_attribute(new_stripes);
 222
 223 read_attribute(io_timers_read);
 224 read_attribute(io_timers_write);
 225
 226 read_attribute(moving_ctxts);
 227
 228 #ifdef CONFIG_BCACHEFS_TESTS
 229 write_attribute(perf_test);
 230 #endif /* CONFIG_BCACHEFS_TESTS */
 231
 232 #define x(_name)                                                \
 233         static struct attribute sysfs_time_stat_##_name =               \
 234                 { .name = #_name, .mode = 0444 };
 235         BCH_TIME_STATS()
 236 #undef x
 237
 238 static struct attribute sysfs_state_rw = {
 239         .name = "state",
 240         .mode =  0444,
 241 };
 242
 243 static size_t bch2_btree_cache_size(struct bch_fs *c)
 244 {
 245         size_t ret = 0;
 246         struct btree *b;
 247
 248         mutex_lock(&c->btree_cache.lock);
 249         list_for_each_entry(b, &c->btree_cache.live, list)
 250                 ret += btree_bytes(c);
 251
 252         mutex_unlock(&c->btree_cache.lock);
 253         return ret;
 254 }
 255
 256 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 257 {
 258         struct btree_trans *trans;
 259         struct btree_iter iter;
 260         struct bkey_s_c k;
 261         enum btree_id id;
 262         struct compression_type_stats {
 263                 u64             nr_extents;
 264                 u64             sectors_compressed;
 265                 u64             sectors_uncompressed;
 266         } s[BCH_COMPRESSION_TYPE_NR];
 267         u64 compressed_incompressible = 0;
 268         int ret = 0;
 269
 270         memset(s, 0, sizeof(s));
 271
 272         if (!test_bit(BCH_FS_started, &c->flags))
 273                 return -EPERM;
 274
 275         trans = bch2_trans_get(c);
 276
 277         for (id = 0; id < BTREE_ID_NR; id++) {
 278                 if (!btree_type_has_ptrs(id))
 279                         continue;
 280
 281                 for_each_btree_key(trans, iter, id, POS_MIN,
 282                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 283                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 284                         struct bch_extent_crc_unpacked crc;
 285                         const union bch_extent_entry *entry;
 286                         bool compressed = false, incompressible = false;
 287
 288                         bkey_for_each_crc(k.k, ptrs, crc, entry) {
 289                                 incompressible  |= crc.compression_type == BCH_COMPRESSION_TYPE_incompressible;
 290                                 compressed      |= crc_is_compressed(crc);
 291
 292                                 if (crc_is_compressed(crc)) {
 293                                         s[crc.compression_type].nr_extents++;
 294                                         s[crc.compression_type].sectors_compressed += crc.compressed_size;
 295                                         s[crc.compression_type].sectors_uncompressed += crc.uncompressed_size;
 296                                 }
 297                         }
 298
 299                         compressed_incompressible += compressed && incompressible;
 300
 301                         if (!compressed) {
 302                                 unsigned t = incompressible ? BCH_COMPRESSION_TYPE_incompressible : 0;
 303
 304                                 s[t].nr_extents++;
 305                                 s[t].sectors_compressed += k.k->size;
 306                                 s[t].sectors_uncompressed += k.k->size;
 307                         }
 308                 }
 309                 bch2_trans_iter_exit(trans, &iter);
 310         }
 311
 312         bch2_trans_put(trans);
 313
 314         if (ret)
 315                 return ret;
 316
 317         prt_str(out, "type");
 318         printbuf_tabstop_push(out, 12);
 319         prt_tab(out);
 320
 321         prt_str(out, "compressed");
 322         printbuf_tabstop_push(out, 16);
 323         prt_tab_rjust(out);
 324
 325         prt_str(out, "uncompressed");
 326         printbuf_tabstop_push(out, 16);
 327         prt_tab_rjust(out);
 328
 329         prt_str(out, "average extent size");
 330         printbuf_tabstop_push(out, 24);
 331         prt_tab_rjust(out);
 332         prt_newline(out);
 333
 334         for (unsigned i = 0; i < ARRAY_SIZE(s); i++) {
 335                 prt_str(out, bch2_compression_types[i]);
 336                 prt_tab(out);
 337
 338                 prt_human_readable_u64(out, s[i].sectors_compressed << 9);
 339                 prt_tab_rjust(out);
 340
 341                 prt_human_readable_u64(out, s[i].sectors_uncompressed << 9);
 342                 prt_tab_rjust(out);
 343
 344                 prt_human_readable_u64(out, s[i].nr_extents
 345                                        ? div_u64(s[i].sectors_uncompressed << 9, s[i].nr_extents)
 346                                        : 0);
 347                 prt_tab_rjust(out);
 348                 prt_newline(out);
 349         }
 350
 351         if (compressed_incompressible) {
 352                 prt_printf(out, "%llu compressed & incompressible extents", compressed_incompressible);
 353                 prt_newline(out);
 354         }
 355
 356         return 0;
 357 }
 358
 359 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 360 {
 361         prt_printf(out, "%s: ", bch2_btree_id_str(c->gc_gens_btree));
 362         bch2_bpos_to_text(out, c->gc_gens_pos);
 363         prt_printf(out, "\n");
 364 }
 365
 366 static void bch2_btree_wakeup_all(struct bch_fs *c)
 367 {
 368         struct btree_trans *trans;
 369
 370         seqmutex_lock(&c->btree_trans_lock);
 371         list_for_each_entry(trans, &c->btree_trans_list, list) {
 372                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 373
 374                 if (b)
 375                         six_lock_wakeup_all(&b->lock);
 376
 377         }
 378         seqmutex_unlock(&c->btree_trans_lock);
 379 }
 380
 381 SHOW(bch2_fs)
 382 {
 383         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 384
 385         sysfs_print(minor,                      c->minor);
 386         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 387
 388         if (attr == &sysfs_flags)
 389                 prt_bitflags(out, bch2_fs_flag_strs, c->flags);
 390
 391         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 392
 393         if (attr == &sysfs_btree_write_stats)
 394                 bch2_btree_write_stats_to_text(out, c);
 395
 396         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 397
 398         if (attr == &sysfs_gc_gens_pos)
 399                 bch2_gc_gens_pos_to_text(out, c);
 400
 401         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 402
 403         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 404         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 405
 406         if (attr == &sysfs_copy_gc_wait)
 407                 bch2_copygc_wait_to_text(out, c);
 408
 409         if (attr == &sysfs_rebalance_status)
 410                 bch2_rebalance_status_to_text(out, c);
 411
 412         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 413
 414         /* Debugging: */
 415
 416         if (attr == &sysfs_journal_debug)
 417                 bch2_journal_debug_to_text(out, &c->journal);
 418
 419         if (attr == &sysfs_btree_updates)
 420                 bch2_btree_updates_to_text(out, c);
 421
 422         if (attr == &sysfs_btree_cache)
 423                 bch2_btree_cache_to_text(out, c);
 424
 425         if (attr == &sysfs_btree_key_cache)
 426                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 427
 428         if (attr == &sysfs_stripes_heap)
 429                 bch2_stripes_heap_to_text(out, c);
 430
 431         if (attr == &sysfs_open_buckets)
 432                 bch2_open_buckets_to_text(out, c);
 433
 434         if (attr == &sysfs_open_buckets_partial)
 435                 bch2_open_buckets_partial_to_text(out, c);
 436
 437         if (attr == &sysfs_write_points)
 438                 bch2_write_points_to_text(out, c);
 439
 440         if (attr == &sysfs_compression_stats)
 441                 bch2_compression_stats_to_text(out, c);
 442
 443         if (attr == &sysfs_new_stripes)
 444                 bch2_new_stripes_to_text(out, c);
 445
 446         if (attr == &sysfs_io_timers_read)
 447                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 448
 449         if (attr == &sysfs_io_timers_write)
 450                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 451
 452         if (attr == &sysfs_moving_ctxts)
 453                 bch2_fs_moving_ctxts_to_text(out, c);
 454
 455 #ifdef BCH_WRITE_REF_DEBUG
 456         if (attr == &sysfs_write_refs)
 457                 bch2_write_refs_to_text(out, c);
 458 #endif
 459
 460         if (attr == &sysfs_nocow_lock_table)
 461                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 462
 463         if (attr == &sysfs_disk_groups)
 464                 bch2_disk_groups_to_text(out, c);
 465
 466         return 0;
 467 }
 468
 469 STORE(bch2_fs)
 470 {
 471         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 472
 473         if (attr == &sysfs_btree_gc_periodic) {
 474                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 475                         ?: (ssize_t) size;
 476
 477                 wake_up_process(c->gc_thread);
 478                 return ret;
 479         }
 480
 481         if (attr == &sysfs_copy_gc_enabled) {
 482                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 483                         ?: (ssize_t) size;
 484
 485                 if (c->copygc_thread)
 486                         wake_up_process(c->copygc_thread);
 487                 return ret;
 488         }
 489
 490         if (attr == &sysfs_rebalance_enabled) {
 491                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 492                         ?: (ssize_t) size;
 493
 494                 rebalance_wakeup(c);
 495                 return ret;
 496         }
 497
 498         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 499
 500         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 501
 502         /* Debugging: */
 503
 504         if (!test_bit(BCH_FS_started, &c->flags))
 505                 return -EPERM;
 506
 507         /* Debugging: */
 508
 509         if (!test_bit(BCH_FS_rw, &c->flags))
 510                 return -EROFS;
 511
 512         if (attr == &sysfs_prune_cache) {
 513                 struct shrink_control sc;
 514
 515                 sc.gfp_mask = GFP_KERNEL;
 516                 sc.nr_to_scan = strtoul_or_return(buf);
 517                 c->btree_cache.shrink->scan_objects(c->btree_cache.shrink, &sc);
 518         }
 519
 520         if (attr == &sysfs_btree_wakeup)
 521                 bch2_btree_wakeup_all(c);
 522
 523         if (attr == &sysfs_trigger_gc) {
 524                 /*
 525                  * Full gc is currently incompatible with btree key cache:
 526                  */
 527 #if 0
 528                 down_read(&c->state_lock);
 529                 bch2_gc(c, false, false);
 530                 up_read(&c->state_lock);
 531 #else
 532                 bch2_gc_gens(c);
 533 #endif
 534         }
 535
 536         if (attr == &sysfs_trigger_discards)
 537                 bch2_do_discards(c);
 538
 539         if (attr == &sysfs_trigger_invalidates)
 540                 bch2_do_invalidates(c);
 541
 542 #ifdef CONFIG_BCACHEFS_TESTS
 543         if (attr == &sysfs_perf_test) {
 544                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 545                 char *test              = strsep(&p, " \t\n");
 546                 char *nr_str            = strsep(&p, " \t\n");
 547                 char *threads_str       = strsep(&p, " \t\n");
 548                 unsigned threads;
 549                 u64 nr;
 550                 int ret = -EINVAL;
 551
 552                 if (threads_str &&
 553                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 554                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 555                         ret = bch2_btree_perf_test(c, test, nr, threads);
 556                 kfree(tmp);
 557
 558                 if (ret)
 559                         size = ret;
 560         }
 561 #endif
 562         return size;
 563 }
 564 SYSFS_OPS(bch2_fs);
 565
 566 struct attribute *bch2_fs_files[] = {
 567         &sysfs_minor,
 568         &sysfs_btree_cache_size,
 569         &sysfs_btree_write_stats,
 570
 571         &sysfs_promote_whole_extents,
 572
 573         &sysfs_compression_stats,
 574
 575 #ifdef CONFIG_BCACHEFS_TESTS
 576         &sysfs_perf_test,
 577 #endif
 578         NULL
 579 };
 580
 581 /* counters dir */
 582
 583 SHOW(bch2_fs_counters)
 584 {
 585         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 586         u64 counter = 0;
 587         u64 counter_since_mount = 0;
 588
 589         printbuf_tabstop_push(out, 32);
 590
 591         #define x(t, ...) \
 592                 if (attr == &sysfs_##t) {                                       \
 593                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 594                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 595                         prt_printf(out, "since mount:");                                \
 596                         prt_tab(out);                                           \
 597                         prt_human_readable_u64(out, counter_since_mount);       \
 598                         prt_newline(out);                                       \
 599                                                                                 \
 600                         prt_printf(out, "since filesystem creation:");          \
 601                         prt_tab(out);                                           \
 602                         prt_human_readable_u64(out, counter);                   \
 603                         prt_newline(out);                                       \
 604                 }
 605         BCH_PERSISTENT_COUNTERS()
 606         #undef x
 607         return 0;
 608 }
 609
 610 STORE(bch2_fs_counters) {
 611         return 0;
 612 }
 613
 614 SYSFS_OPS(bch2_fs_counters);
 615
 616 struct attribute *bch2_fs_counters_files[] = {
 617 #define x(t, ...) \
 618         &sysfs_##t,
 619         BCH_PERSISTENT_COUNTERS()
 620 #undef x
 621         NULL
 622 };
 623 /* internal dir - just a wrapper */
 624
 625 SHOW(bch2_fs_internal)
 626 {
 627         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 628
 629         return bch2_fs_to_text(out, &c->kobj, attr);
 630 }
 631
 632 STORE(bch2_fs_internal)
 633 {
 634         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 635
 636         return bch2_fs_store(&c->kobj, attr, buf, size);
 637 }
 638 SYSFS_OPS(bch2_fs_internal);
 639
 640 struct attribute *bch2_fs_internal_files[] = {
 641         &sysfs_flags,
 642         &sysfs_journal_debug,
 643         &sysfs_btree_updates,
 644         &sysfs_btree_cache,
 645         &sysfs_btree_key_cache,
 646         &sysfs_new_stripes,
 647         &sysfs_stripes_heap,
 648         &sysfs_open_buckets,
 649         &sysfs_open_buckets_partial,
 650         &sysfs_write_points,
 651 #ifdef BCH_WRITE_REF_DEBUG
 652         &sysfs_write_refs,
 653 #endif
 654         &sysfs_nocow_lock_table,
 655         &sysfs_io_timers_read,
 656         &sysfs_io_timers_write,
 657
 658         &sysfs_trigger_gc,
 659         &sysfs_trigger_discards,
 660         &sysfs_trigger_invalidates,
 661         &sysfs_prune_cache,
 662         &sysfs_btree_wakeup,
 663
 664         &sysfs_gc_gens_pos,
 665
 666         &sysfs_copy_gc_enabled,
 667         &sysfs_copy_gc_wait,
 668
 669         &sysfs_rebalance_enabled,
 670         &sysfs_rebalance_status,
 671         sysfs_pd_controller_files(rebalance),
 672
 673         &sysfs_moving_ctxts,
 674
 675         &sysfs_internal_uuid,
 676
 677         &sysfs_disk_groups,
 678         NULL
 679 };
 680
 681 /* options */
 682
 683 SHOW(bch2_fs_opts_dir)
 684 {
 685         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 686         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 687         int id = opt - bch2_opt_table;
 688         u64 v = bch2_opt_get_by_id(&c->opts, id);
 689
 690         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 691         prt_char(out, '\n');
 692
 693         return 0;
 694 }
 695
 696 STORE(bch2_fs_opts_dir)
 697 {
 698         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 699         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 700         int ret, id = opt - bch2_opt_table;
 701         char *tmp;
 702         u64 v;
 703
 704         /*
 705          * We don't need to take c->writes for correctness, but it eliminates an
 706          * unsightly error message in the dmesg log when we're RO:
 707          */
 708         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 709                 return -EROFS;
 710
 711         tmp = kstrdup(buf, GFP_KERNEL);
 712         if (!tmp) {
 713                 ret = -ENOMEM;
 714                 goto err;
 715         }
 716
 717         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 718         kfree(tmp);
 719
 720         if (ret < 0)
 721                 goto err;
 722
 723         ret = bch2_opt_check_may_set(c, id, v);
 724         if (ret < 0)
 725                 goto err;
 726
 727         bch2_opt_set_sb(c, opt, v);
 728         bch2_opt_set_by_id(&c->opts, id, v);
 729
 730         if ((id == Opt_background_target ||
 731              id == Opt_background_compression) && v)
 732                 bch2_set_rebalance_needs_scan(c, 0);
 733
 734         ret = size;
 735 err:
 736         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 737         return ret;
 738 }
 739 SYSFS_OPS(bch2_fs_opts_dir);
 740
 741 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 742
 743 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 744 {
 745         const struct bch_option *i;
 746         int ret;
 747
 748         for (i = bch2_opt_table;
 749              i < bch2_opt_table + bch2_opts_nr;
 750              i++) {
 751                 if (!(i->flags & OPT_FS))
 752                         continue;
 753
 754                 ret = sysfs_create_file(kobj, &i->attr);
 755                 if (ret)
 756                         return ret;
 757         }
 758
 759         return 0;
 760 }
 761
 762 /* time stats */
 763
 764 SHOW(bch2_fs_time_stats)
 765 {
 766         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 767
 768 #define x(name)                                                         \
 769         if (attr == &sysfs_time_stat_##name)                            \
 770                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 771         BCH_TIME_STATS()
 772 #undef x
 773
 774         return 0;
 775 }
 776
 777 STORE(bch2_fs_time_stats)
 778 {
 779         return size;
 780 }
 781 SYSFS_OPS(bch2_fs_time_stats);
 782
 783 struct attribute *bch2_fs_time_stats_files[] = {
 784 #define x(name)                                         \
 785         &sysfs_time_stat_##name,
 786         BCH_TIME_STATS()
 787 #undef x
 788         NULL
 789 };
 790
 791 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 792 {
 793         struct bch_fs *c = ca->fs;
 794         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 795         unsigned i, nr[BCH_DATA_NR];
 796
 797         memset(nr, 0, sizeof(nr));
 798
 799         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 800                 nr[c->open_buckets[i].data_type]++;
 801
 802         printbuf_tabstop_push(out, 8);
 803         printbuf_tabstop_push(out, 16);
 804         printbuf_tabstop_push(out, 16);
 805         printbuf_tabstop_push(out, 16);
 806         printbuf_tabstop_push(out, 16);
 807
 808         bch2_dev_usage_to_text(out, &stats);
 809
 810         prt_newline(out);
 811
 812         prt_printf(out, "reserves:");
 813         prt_newline(out);
 814         for (i = 0; i < BCH_WATERMARK_NR; i++) {
 815                 prt_str(out, bch2_watermarks[i]);
 816                 prt_tab(out);
 817                 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
 818                 prt_tab_rjust(out);
 819                 prt_newline(out);
 820         }
 821
 822         prt_newline(out);
 823
 824         printbuf_tabstops_reset(out);
 825         printbuf_tabstop_push(out, 24);
 826
 827         prt_str(out, "freelist_wait");
 828         prt_tab(out);
 829         prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
 830         prt_newline(out);
 831
 832         prt_str(out, "open buckets allocated");
 833         prt_tab(out);
 834         prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
 835         prt_newline(out);
 836
 837         prt_str(out, "open buckets this dev");
 838         prt_tab(out);
 839         prt_u64(out, ca->nr_open_buckets);
 840         prt_newline(out);
 841
 842         prt_str(out, "open buckets total");
 843         prt_tab(out);
 844         prt_u64(out, OPEN_BUCKETS_COUNT);
 845         prt_newline(out);
 846
 847         prt_str(out, "open_buckets_wait");
 848         prt_tab(out);
 849         prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
 850         prt_newline(out);
 851
 852         prt_str(out, "open_buckets_btree");
 853         prt_tab(out);
 854         prt_u64(out, nr[BCH_DATA_btree]);
 855         prt_newline(out);
 856
 857         prt_str(out, "open_buckets_user");
 858         prt_tab(out);
 859         prt_u64(out, nr[BCH_DATA_user]);
 860         prt_newline(out);
 861
 862         prt_str(out, "buckets_to_invalidate");
 863         prt_tab(out);
 864         prt_u64(out, should_invalidate_buckets(ca, stats));
 865         prt_newline(out);
 866
 867         prt_str(out, "btree reserve cache");
 868         prt_tab(out);
 869         prt_u64(out, c->btree_reserve_cache_nr);
 870         prt_newline(out);
 871 }
 872
 873 static const char * const bch2_rw[] = {
 874         "read",
 875         "write",
 876         NULL
 877 };
 878
 879 static void dev_io_done_to_text(struct printbuf *out, struct bch_dev *ca)
 880 {
 881         int rw, i;
 882
 883         for (rw = 0; rw < 2; rw++) {
 884                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 885
 886                 for (i = 1; i < BCH_DATA_NR; i++)
 887                         prt_printf(out, "%-12s:%12llu\n",
 888                                bch2_data_types[i],
 889                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 890         }
 891 }
 892
 893 SHOW(bch2_dev)
 894 {
 895         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 896         struct bch_fs *c = ca->fs;
 897
 898         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 899
 900         sysfs_print(bucket_size,        bucket_bytes(ca));
 901         sysfs_print(first_bucket,       ca->mi.first_bucket);
 902         sysfs_print(nbuckets,           ca->mi.nbuckets);
 903         sysfs_print(durability,         ca->mi.durability);
 904         sysfs_print(discard,            ca->mi.discard);
 905
 906         if (attr == &sysfs_label) {
 907                 if (ca->mi.group)
 908                         bch2_disk_path_to_text(out, c, ca->mi.group - 1);
 909                 prt_char(out, '\n');
 910         }
 911
 912         if (attr == &sysfs_has_data) {
 913                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 914                 prt_char(out, '\n');
 915         }
 916
 917         if (attr == &sysfs_state_rw) {
 918                 prt_string_option(out, bch2_member_states, ca->mi.state);
 919                 prt_char(out, '\n');
 920         }
 921
 922         if (attr == &sysfs_io_done)
 923                 dev_io_done_to_text(out, ca);
 924
 925         if (attr == &sysfs_io_errors)
 926                 bch2_dev_io_errors_to_text(out, ca);
 927
 928         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 929         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 930
 931         if (attr == &sysfs_io_latency_stats_read)
 932                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 933
 934         if (attr == &sysfs_io_latency_stats_write)
 935                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 936
 937         sysfs_printf(congested,                 "%u%%",
 938                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 939                      * 100 / CONGESTED_MAX);
 940
 941         if (attr == &sysfs_alloc_debug)
 942                 dev_alloc_debug_to_text(out, ca);
 943
 944         return 0;
 945 }
 946
 947 STORE(bch2_dev)
 948 {
 949         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 950         struct bch_fs *c = ca->fs;
 951         struct bch_member *mi;
 952
 953         if (attr == &sysfs_discard) {
 954                 bool v = strtoul_or_return(buf);
 955
 956                 mutex_lock(&c->sb_lock);
 957                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 958
 959                 if (v != BCH_MEMBER_DISCARD(mi)) {
 960                         SET_BCH_MEMBER_DISCARD(mi, v);
 961                         bch2_write_super(c);
 962                 }
 963                 mutex_unlock(&c->sb_lock);
 964         }
 965
 966         if (attr == &sysfs_durability) {
 967                 u64 v = strtoul_or_return(buf);
 968
 969                 mutex_lock(&c->sb_lock);
 970                 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
 971
 972                 if (v + 1 != BCH_MEMBER_DURABILITY(mi)) {
 973                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
 974                         bch2_write_super(c);
 975                 }
 976                 mutex_unlock(&c->sb_lock);
 977         }
 978
 979         if (attr == &sysfs_label) {
 980                 char *tmp;
 981                 int ret;
 982
 983                 tmp = kstrdup(buf, GFP_KERNEL);
 984                 if (!tmp)
 985                         return -ENOMEM;
 986
 987                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 988                 kfree(tmp);
 989                 if (ret)
 990                         return ret;
 991         }
 992
 993         if (attr == &sysfs_io_errors_reset)
 994                 bch2_dev_errors_reset(ca);
 995
 996         return size;
 997 }
 998 SYSFS_OPS(bch2_dev);
 999
1000 struct attribute *bch2_dev_files[] = {
1001         &sysfs_uuid,
1002         &sysfs_bucket_size,
1003         &sysfs_first_bucket,
1004         &sysfs_nbuckets,
1005         &sysfs_durability,
1006
1007         /* settings: */
1008         &sysfs_discard,
1009         &sysfs_state_rw,
1010         &sysfs_label,
1011
1012         &sysfs_has_data,
1013         &sysfs_io_done,
1014         &sysfs_io_errors,
1015         &sysfs_io_errors_reset,
1016
1017         &sysfs_io_latency_read,
1018         &sysfs_io_latency_write,
1019         &sysfs_io_latency_stats_read,
1020         &sysfs_io_latency_stats_write,
1021         &sysfs_congested,
1022
1023         /* debug: */
1024         &sysfs_alloc_debug,
1025         NULL
1026 };
1027
1028 #endif  /* _BCACHEFS_SYSFS_H_ */