fs/bcachefs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * bcache sysfs interfaces
   4  *
   5  * Copyright 2010, 2011 Kent Overstreet <[email protected]>
   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_accounting.h"
  26 #include "disk_groups.h"
  27 #include "ec.h"
  28 #include "inode.h"
  29 #include "journal.h"
  30 #include "journal_reclaim.h"
  31 #include "keylist.h"
  32 #include "move.h"
  33 #include "movinggc.h"
  34 #include "nocow_locking.h"
  35 #include "opts.h"
  36 #include "rebalance.h"
  37 #include "replicas.h"
  38 #include "super-io.h"
  39 #include "tests.h"
  40
  41 #include <linux/blkdev.h>
  42 #include <linux/sort.h>
  43 #include <linux/sched/clock.h>
  44
  45 #include "util.h"
  46
  47 #define SYSFS_OPS(type)                                                 \
  48 const struct sysfs_ops type ## _sysfs_ops = {                           \
  49         .show   = type ## _show,                                        \
  50         .store  = type ## _store                                        \
  51 }
  52
  53 #define SHOW(fn)                                                        \
  54 static ssize_t fn ## _to_text(struct printbuf *,                        \
  55                               struct kobject *, struct attribute *);    \
  56                                                                         \
  57 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  58                            char *buf)                                   \
  59 {                                                                       \
  60         struct printbuf out = PRINTBUF;                                 \
  61         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  62                                                                         \
  63         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  64                 prt_newline(&out);                                      \
  65                                                                         \
  66         if (!ret && out.allocation_failure)                             \
  67                 ret = -ENOMEM;                                          \
  68                                                                         \
  69         if (!ret) {                                                     \
  70                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  71                 memcpy(buf, out.buf, ret);                              \
  72         }                                                               \
  73         printbuf_exit(&out);                                            \
  74         return bch2_err_class(ret);                                     \
  75 }                                                                       \
  76                                                                         \
  77 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  78                               struct attribute *attr)
  79
  80 #define STORE(fn)                                                       \
  81 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
  82                             const char *, size_t);                      \
  83                                                                         \
  84 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  85                             const char *buf, size_t size)               \
  86 {                                                                       \
  87         return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
  88 }                                                                       \
  89                                                                         \
  90 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
  91                                   const char *buf, size_t size)
  92
  93 #define __sysfs_attribute(_name, _mode)                                 \
  94         static struct attribute sysfs_##_name =                         \
  95                 { .name = #_name, .mode = _mode }
  96
  97 #define write_attribute(n)      __sysfs_attribute(n, 0200)
  98 #define read_attribute(n)       __sysfs_attribute(n, 0444)
  99 #define rw_attribute(n)         __sysfs_attribute(n, 0644)
 100
 101 #define sysfs_printf(file, fmt, ...)                                    \
 102 do {                                                                    \
 103         if (attr == &sysfs_ ## file)                                    \
 104                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
 105 } while (0)
 106
 107 #define sysfs_print(file, var)                                          \
 108 do {                                                                    \
 109         if (attr == &sysfs_ ## file)                                    \
 110                 snprint(out, var);                                      \
 111 } while (0)
 112
 113 #define sysfs_hprint(file, val)                                         \
 114 do {                                                                    \
 115         if (attr == &sysfs_ ## file)                                    \
 116                 prt_human_readable_s64(out, val);                       \
 117 } while (0)
 118
 119 #define sysfs_strtoul(file, var)                                        \
 120 do {                                                                    \
 121         if (attr == &sysfs_ ## file)                                    \
 122                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 123 } while (0)
 124
 125 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 126 do {                                                                    \
 127         if (attr == &sysfs_ ## file)                                    \
 128                 return strtoul_safe_clamp(buf, var, min, max)           \
 129                         ?: (ssize_t) size;                              \
 130 } while (0)
 131
 132 #define strtoul_or_return(cp)                                           \
 133 ({                                                                      \
 134         unsigned long _v;                                               \
 135         int _r = kstrtoul(cp, 10, &_v);                                 \
 136         if (_r)                                                         \
 137                 return _r;                                              \
 138         _v;                                                             \
 139 })
 140
 141 write_attribute(trigger_gc);
 142 write_attribute(trigger_discards);
 143 write_attribute(trigger_invalidates);
 144 write_attribute(trigger_journal_flush);
 145 write_attribute(trigger_journal_writes);
 146 write_attribute(trigger_btree_cache_shrink);
 147 write_attribute(trigger_btree_key_cache_shrink);
 148 write_attribute(trigger_freelist_wakeup);
 149 rw_attribute(gc_gens_pos);
 150
 151 read_attribute(uuid);
 152 read_attribute(minor);
 153 read_attribute(flags);
 154 read_attribute(bucket_size);
 155 read_attribute(first_bucket);
 156 read_attribute(nbuckets);
 157 rw_attribute(durability);
 158 read_attribute(io_done);
 159 read_attribute(io_errors);
 160 write_attribute(io_errors_reset);
 161
 162 read_attribute(io_latency_read);
 163 read_attribute(io_latency_write);
 164 read_attribute(io_latency_stats_read);
 165 read_attribute(io_latency_stats_write);
 166 read_attribute(congested);
 167
 168 read_attribute(btree_write_stats);
 169
 170 read_attribute(btree_cache_size);
 171 read_attribute(compression_stats);
 172 read_attribute(journal_debug);
 173 read_attribute(btree_cache);
 174 read_attribute(btree_key_cache);
 175 read_attribute(btree_reserve_cache);
 176 read_attribute(stripes_heap);
 177 read_attribute(open_buckets);
 178 read_attribute(open_buckets_partial);
 179 read_attribute(write_points);
 180 read_attribute(nocow_lock_table);
 181
 182 #ifdef BCH_WRITE_REF_DEBUG
 183 read_attribute(write_refs);
 184
 185 static const char * const bch2_write_refs[] = {
 186 #define x(n)    #n,
 187         BCH_WRITE_REFS()
 188 #undef x
 189         NULL
 190 };
 191
 192 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 193 {
 194         bch2_printbuf_tabstop_push(out, 24);
 195
 196         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++)
 197                 prt_printf(out, "%s\t%li\n", bch2_write_refs[i], atomic_long_read(&c->writes[i]));
 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 read_attribute(accounting);
 207 read_attribute(usage_base);
 208
 209 #define x(t, n, ...) read_attribute(t);
 210 BCH_PERSISTENT_COUNTERS()
 211 #undef x
 212
 213 rw_attribute(discard);
 214 rw_attribute(label);
 215
 216 rw_attribute(copy_gc_enabled);
 217 read_attribute(copy_gc_wait);
 218
 219 rw_attribute(rebalance_enabled);
 220 sysfs_pd_controller_attribute(rebalance);
 221 read_attribute(rebalance_status);
 222
 223 read_attribute(new_stripes);
 224
 225 read_attribute(io_timers_read);
 226 read_attribute(io_timers_write);
 227
 228 read_attribute(moving_ctxts);
 229
 230 #ifdef CONFIG_BCACHEFS_TESTS
 231 write_attribute(perf_test);
 232 #endif /* CONFIG_BCACHEFS_TESTS */
 233
 234 #define x(_name)                                                \
 235         static struct attribute sysfs_time_stat_##_name =               \
 236                 { .name = #_name, .mode = 0644 };
 237         BCH_TIME_STATS()
 238 #undef x
 239
 240 static struct attribute sysfs_state_rw = {
 241         .name = "state",
 242         .mode =  0444,
 243 };
 244
 245 static size_t bch2_btree_cache_size(struct bch_fs *c)
 246 {
 247         struct btree_cache *bc = &c->btree_cache;
 248         size_t ret = 0;
 249         struct btree *b;
 250
 251         mutex_lock(&bc->lock);
 252         list_for_each_entry(b, &bc->live[0].list, list)
 253                 ret += btree_buf_bytes(b);
 254         list_for_each_entry(b, &bc->live[1].list, list)
 255                 ret += btree_buf_bytes(b);
 256         list_for_each_entry(b, &bc->freeable, list)
 257                 ret += btree_buf_bytes(b);
 258         mutex_unlock(&bc->lock);
 259         return ret;
 260 }
 261
 262 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 263 {
 264         prt_str(out, "type");
 265         printbuf_tabstop_push(out, 12);
 266         printbuf_tabstop_push(out, 16);
 267         printbuf_tabstop_push(out, 16);
 268         printbuf_tabstop_push(out, 24);
 269         prt_printf(out, "type\tcompressed\runcompressed\raverage extent size\r\n");
 270
 271         for (unsigned i = 1; i < BCH_COMPRESSION_TYPE_NR; i++) {
 272                 struct disk_accounting_pos a = {
 273                         .type                   = BCH_DISK_ACCOUNTING_compression,
 274                         .compression.type       = i,
 275                 };
 276                 struct bpos p = disk_accounting_pos_to_bpos(&a);
 277                 u64 v[3];
 278                 bch2_accounting_mem_read(c, p, v, ARRAY_SIZE(v));
 279
 280                 u64 nr_extents                  = v[0];
 281                 u64 sectors_uncompressed        = v[1];
 282                 u64 sectors_compressed          = v[2];
 283
 284                 bch2_prt_compression_type(out, i);
 285                 prt_tab(out);
 286
 287                 prt_human_readable_u64(out, sectors_compressed << 9);
 288                 prt_tab_rjust(out);
 289
 290                 prt_human_readable_u64(out, sectors_uncompressed << 9);
 291                 prt_tab_rjust(out);
 292
 293                 prt_human_readable_u64(out, nr_extents
 294                                        ? div64_u64(sectors_uncompressed << 9, nr_extents)
 295                                        : 0);
 296                 prt_tab_rjust(out);
 297                 prt_newline(out);
 298         }
 299
 300         return 0;
 301 }
 302
 303 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 304 {
 305         prt_printf(out, "%s: ", bch2_btree_id_str(c->gc_gens_btree));
 306         bch2_bpos_to_text(out, c->gc_gens_pos);
 307         prt_printf(out, "\n");
 308 }
 309
 310 static void bch2_fs_usage_base_to_text(struct printbuf *out, struct bch_fs *c)
 311 {
 312         struct bch_fs_usage_base b = {};
 313
 314         acc_u64s_percpu(&b.hidden, &c->usage->hidden, sizeof(b) / sizeof(u64));
 315
 316         prt_printf(out, "hidden:\t\t%llu\n",    b.hidden);
 317         prt_printf(out, "btree:\t\t%llu\n",     b.btree);
 318         prt_printf(out, "data:\t\t%llu\n",      b.data);
 319         prt_printf(out, "cached:\t%llu\n",      b.cached);
 320         prt_printf(out, "reserved:\t\t%llu\n",  b.reserved);
 321         prt_printf(out, "nr_inodes:\t%llu\n",   b.nr_inodes);
 322 }
 323
 324 SHOW(bch2_fs)
 325 {
 326         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 327
 328         sysfs_print(minor,                      c->minor);
 329         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 330
 331         if (attr == &sysfs_flags)
 332                 prt_bitflags(out, bch2_fs_flag_strs, c->flags);
 333
 334         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 335
 336         if (attr == &sysfs_btree_write_stats)
 337                 bch2_btree_write_stats_to_text(out, c);
 338
 339         if (attr == &sysfs_gc_gens_pos)
 340                 bch2_gc_gens_pos_to_text(out, c);
 341
 342         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 343
 344         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 345         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 346
 347         if (attr == &sysfs_copy_gc_wait)
 348                 bch2_copygc_wait_to_text(out, c);
 349
 350         if (attr == &sysfs_rebalance_status)
 351                 bch2_rebalance_status_to_text(out, c);
 352
 353         /* Debugging: */
 354
 355         if (attr == &sysfs_journal_debug)
 356                 bch2_journal_debug_to_text(out, &c->journal);
 357
 358         if (attr == &sysfs_btree_cache)
 359                 bch2_btree_cache_to_text(out, &c->btree_cache);
 360
 361         if (attr == &sysfs_btree_key_cache)
 362                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 363
 364         if (attr == &sysfs_btree_reserve_cache)
 365                 bch2_btree_reserve_cache_to_text(out, c);
 366
 367         if (attr == &sysfs_stripes_heap)
 368                 bch2_stripes_heap_to_text(out, c);
 369
 370         if (attr == &sysfs_open_buckets)
 371                 bch2_open_buckets_to_text(out, c, NULL);
 372
 373         if (attr == &sysfs_open_buckets_partial)
 374                 bch2_open_buckets_partial_to_text(out, c);
 375
 376         if (attr == &sysfs_write_points)
 377                 bch2_write_points_to_text(out, c);
 378
 379         if (attr == &sysfs_compression_stats)
 380                 bch2_compression_stats_to_text(out, c);
 381
 382         if (attr == &sysfs_new_stripes)
 383                 bch2_new_stripes_to_text(out, c);
 384
 385         if (attr == &sysfs_io_timers_read)
 386                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 387
 388         if (attr == &sysfs_io_timers_write)
 389                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 390
 391         if (attr == &sysfs_moving_ctxts)
 392                 bch2_fs_moving_ctxts_to_text(out, c);
 393
 394 #ifdef BCH_WRITE_REF_DEBUG
 395         if (attr == &sysfs_write_refs)
 396                 bch2_write_refs_to_text(out, c);
 397 #endif
 398
 399         if (attr == &sysfs_nocow_lock_table)
 400                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 401
 402         if (attr == &sysfs_disk_groups)
 403                 bch2_disk_groups_to_text(out, c);
 404
 405         if (attr == &sysfs_alloc_debug)
 406                 bch2_fs_alloc_debug_to_text(out, c);
 407
 408         if (attr == &sysfs_accounting)
 409                 bch2_fs_accounting_to_text(out, c);
 410
 411         if (attr == &sysfs_usage_base)
 412                 bch2_fs_usage_base_to_text(out, c);
 413
 414         return 0;
 415 }
 416
 417 STORE(bch2_fs)
 418 {
 419         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 420
 421         if (attr == &sysfs_copy_gc_enabled) {
 422                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 423                         ?: (ssize_t) size;
 424
 425                 if (c->copygc_thread)
 426                         wake_up_process(c->copygc_thread);
 427                 return ret;
 428         }
 429
 430         if (attr == &sysfs_rebalance_enabled) {
 431                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 432                         ?: (ssize_t) size;
 433
 434                 rebalance_wakeup(c);
 435                 return ret;
 436         }
 437
 438         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 439
 440         /* Debugging: */
 441
 442         if (!test_bit(BCH_FS_started, &c->flags))
 443                 return -EPERM;
 444
 445         /* Debugging: */
 446
 447         if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs))
 448                 return -EROFS;
 449
 450         if (attr == &sysfs_trigger_btree_cache_shrink) {
 451                 struct btree_cache *bc = &c->btree_cache;
 452                 struct shrink_control sc;
 453
 454                 sc.gfp_mask = GFP_KERNEL;
 455                 sc.nr_to_scan = strtoul_or_return(buf);
 456                 bc->live[0].shrink->scan_objects(bc->live[0].shrink, &sc);
 457         }
 458
 459         if (attr == &sysfs_trigger_btree_key_cache_shrink) {
 460                 struct shrink_control sc;
 461
 462                 sc.gfp_mask = GFP_KERNEL;
 463                 sc.nr_to_scan = strtoul_or_return(buf);
 464                 c->btree_key_cache.shrink->scan_objects(c->btree_key_cache.shrink, &sc);
 465         }
 466
 467         if (attr == &sysfs_trigger_gc)
 468                 bch2_gc_gens(c);
 469
 470         if (attr == &sysfs_trigger_discards)
 471                 bch2_do_discards(c);
 472
 473         if (attr == &sysfs_trigger_invalidates)
 474                 bch2_do_invalidates(c);
 475
 476         if (attr == &sysfs_trigger_journal_flush) {
 477                 bch2_journal_flush_all_pins(&c->journal);
 478                 bch2_journal_meta(&c->journal);
 479         }
 480
 481         if (attr == &sysfs_trigger_journal_writes)
 482                 bch2_journal_do_writes(&c->journal);
 483
 484         if (attr == &sysfs_trigger_freelist_wakeup)
 485                 closure_wake_up(&c->freelist_wait);
 486
 487 #ifdef CONFIG_BCACHEFS_TESTS
 488         if (attr == &sysfs_perf_test) {
 489                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 490                 char *test              = strsep(&p, " \t\n");
 491                 char *nr_str            = strsep(&p, " \t\n");
 492                 char *threads_str       = strsep(&p, " \t\n");
 493                 unsigned threads;
 494                 u64 nr;
 495                 int ret = -EINVAL;
 496
 497                 if (threads_str &&
 498                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 499                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 500                         ret = bch2_btree_perf_test(c, test, nr, threads);
 501                 kfree(tmp);
 502
 503                 if (ret)
 504                         size = ret;
 505         }
 506 #endif
 507         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 508         return size;
 509 }
 510 SYSFS_OPS(bch2_fs);
 511
 512 struct attribute *bch2_fs_files[] = {
 513         &sysfs_minor,
 514         &sysfs_btree_cache_size,
 515         &sysfs_btree_write_stats,
 516
 517         &sysfs_rebalance_status,
 518
 519         &sysfs_compression_stats,
 520
 521 #ifdef CONFIG_BCACHEFS_TESTS
 522         &sysfs_perf_test,
 523 #endif
 524         NULL
 525 };
 526
 527 /* counters dir */
 528
 529 SHOW(bch2_fs_counters)
 530 {
 531         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 532         u64 counter = 0;
 533         u64 counter_since_mount = 0;
 534
 535         printbuf_tabstop_push(out, 32);
 536
 537         #define x(t, ...) \
 538                 if (attr == &sysfs_##t) {                                       \
 539                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 540                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 541                         prt_printf(out, "since mount:\t");                      \
 542                         prt_human_readable_u64(out, counter_since_mount);       \
 543                         prt_newline(out);                                       \
 544                                                                                 \
 545                         prt_printf(out, "since filesystem creation:\t");        \
 546                         prt_human_readable_u64(out, counter);                   \
 547                         prt_newline(out);                                       \
 548                 }
 549         BCH_PERSISTENT_COUNTERS()
 550         #undef x
 551         return 0;
 552 }
 553
 554 STORE(bch2_fs_counters) {
 555         return 0;
 556 }
 557
 558 SYSFS_OPS(bch2_fs_counters);
 559
 560 struct attribute *bch2_fs_counters_files[] = {
 561 #define x(t, ...) \
 562         &sysfs_##t,
 563         BCH_PERSISTENT_COUNTERS()
 564 #undef x
 565         NULL
 566 };
 567 /* internal dir - just a wrapper */
 568
 569 SHOW(bch2_fs_internal)
 570 {
 571         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 572
 573         return bch2_fs_to_text(out, &c->kobj, attr);
 574 }
 575
 576 STORE(bch2_fs_internal)
 577 {
 578         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 579
 580         return bch2_fs_store(&c->kobj, attr, buf, size);
 581 }
 582 SYSFS_OPS(bch2_fs_internal);
 583
 584 struct attribute *bch2_fs_internal_files[] = {
 585         &sysfs_flags,
 586         &sysfs_journal_debug,
 587         &sysfs_btree_cache,
 588         &sysfs_btree_key_cache,
 589         &sysfs_btree_reserve_cache,
 590         &sysfs_new_stripes,
 591         &sysfs_stripes_heap,
 592         &sysfs_open_buckets,
 593         &sysfs_open_buckets_partial,
 594         &sysfs_write_points,
 595 #ifdef BCH_WRITE_REF_DEBUG
 596         &sysfs_write_refs,
 597 #endif
 598         &sysfs_nocow_lock_table,
 599         &sysfs_io_timers_read,
 600         &sysfs_io_timers_write,
 601
 602         &sysfs_trigger_gc,
 603         &sysfs_trigger_discards,
 604         &sysfs_trigger_invalidates,
 605         &sysfs_trigger_journal_flush,
 606         &sysfs_trigger_journal_writes,
 607         &sysfs_trigger_btree_cache_shrink,
 608         &sysfs_trigger_btree_key_cache_shrink,
 609         &sysfs_trigger_freelist_wakeup,
 610
 611         &sysfs_gc_gens_pos,
 612
 613         &sysfs_copy_gc_enabled,
 614         &sysfs_copy_gc_wait,
 615
 616         &sysfs_rebalance_enabled,
 617         sysfs_pd_controller_files(rebalance),
 618
 619         &sysfs_moving_ctxts,
 620
 621         &sysfs_internal_uuid,
 622
 623         &sysfs_disk_groups,
 624         &sysfs_alloc_debug,
 625         &sysfs_accounting,
 626         &sysfs_usage_base,
 627         NULL
 628 };
 629
 630 /* options */
 631
 632 SHOW(bch2_fs_opts_dir)
 633 {
 634         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 635         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 636         int id = opt - bch2_opt_table;
 637         u64 v = bch2_opt_get_by_id(&c->opts, id);
 638
 639         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 640         prt_char(out, '\n');
 641
 642         return 0;
 643 }
 644
 645 STORE(bch2_fs_opts_dir)
 646 {
 647         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 648         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 649         int ret, id = opt - bch2_opt_table;
 650         char *tmp;
 651         u64 v;
 652
 653         /*
 654          * We don't need to take c->writes for correctness, but it eliminates an
 655          * unsightly error message in the dmesg log when we're RO:
 656          */
 657         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 658                 return -EROFS;
 659
 660         tmp = kstrdup(buf, GFP_KERNEL);
 661         if (!tmp) {
 662                 ret = -ENOMEM;
 663                 goto err;
 664         }
 665
 666         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 667         kfree(tmp);
 668
 669         if (ret < 0)
 670                 goto err;
 671
 672         ret = bch2_opt_check_may_set(c, id, v);
 673         if (ret < 0)
 674                 goto err;
 675
 676         bch2_opt_set_sb(c, NULL, opt, v);
 677         bch2_opt_set_by_id(&c->opts, id, v);
 678
 679         if (v &&
 680             (id == Opt_background_target ||
 681              id == Opt_background_compression ||
 682              (id == Opt_compression && !c->opts.background_compression)))
 683                 bch2_set_rebalance_needs_scan(c, 0);
 684
 685         ret = size;
 686 err:
 687         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 688         return ret;
 689 }
 690 SYSFS_OPS(bch2_fs_opts_dir);
 691
 692 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 693
 694 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 695 {
 696         const struct bch_option *i;
 697         int ret;
 698
 699         for (i = bch2_opt_table;
 700              i < bch2_opt_table + bch2_opts_nr;
 701              i++) {
 702                 if (!(i->flags & OPT_FS))
 703                         continue;
 704
 705                 ret = sysfs_create_file(kobj, &i->attr);
 706                 if (ret)
 707                         return ret;
 708         }
 709
 710         return 0;
 711 }
 712
 713 /* time stats */
 714
 715 SHOW(bch2_fs_time_stats)
 716 {
 717         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 718
 719 #define x(name)                                                         \
 720         if (attr == &sysfs_time_stat_##name)                            \
 721                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 722         BCH_TIME_STATS()
 723 #undef x
 724
 725         return 0;
 726 }
 727
 728 STORE(bch2_fs_time_stats)
 729 {
 730         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 731
 732 #define x(name)                                                         \
 733         if (attr == &sysfs_time_stat_##name)                            \
 734                 bch2_time_stats_reset(&c->times[BCH_TIME_##name]);
 735         BCH_TIME_STATS()
 736 #undef x
 737         return size;
 738 }
 739 SYSFS_OPS(bch2_fs_time_stats);
 740
 741 struct attribute *bch2_fs_time_stats_files[] = {
 742 #define x(name)                                         \
 743         &sysfs_time_stat_##name,
 744         BCH_TIME_STATS()
 745 #undef x
 746         NULL
 747 };
 748
 749 static const char * const bch2_rw[] = {
 750         "read",
 751         "write",
 752         NULL
 753 };
 754
 755 static void dev_io_done_to_text(struct printbuf *out, struct bch_dev *ca)
 756 {
 757         int rw, i;
 758
 759         for (rw = 0; rw < 2; rw++) {
 760                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 761
 762                 for (i = 1; i < BCH_DATA_NR; i++)
 763                         prt_printf(out, "%-12s:%12llu\n",
 764                                bch2_data_type_str(i),
 765                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 766         }
 767 }
 768
 769 SHOW(bch2_dev)
 770 {
 771         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 772         struct bch_fs *c = ca->fs;
 773
 774         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 775
 776         sysfs_print(bucket_size,        bucket_bytes(ca));
 777         sysfs_print(first_bucket,       ca->mi.first_bucket);
 778         sysfs_print(nbuckets,           ca->mi.nbuckets);
 779         sysfs_print(durability,         ca->mi.durability);
 780         sysfs_print(discard,            ca->mi.discard);
 781
 782         if (attr == &sysfs_label) {
 783                 if (ca->mi.group)
 784                         bch2_disk_path_to_text(out, c, ca->mi.group - 1);
 785                 prt_char(out, '\n');
 786         }
 787
 788         if (attr == &sysfs_has_data) {
 789                 prt_bitflags(out, __bch2_data_types, bch2_dev_has_data(c, ca));
 790                 prt_char(out, '\n');
 791         }
 792
 793         if (attr == &sysfs_state_rw) {
 794                 prt_string_option(out, bch2_member_states, ca->mi.state);
 795                 prt_char(out, '\n');
 796         }
 797
 798         if (attr == &sysfs_io_done)
 799                 dev_io_done_to_text(out, ca);
 800
 801         if (attr == &sysfs_io_errors)
 802                 bch2_dev_io_errors_to_text(out, ca);
 803
 804         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 805         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 806
 807         if (attr == &sysfs_io_latency_stats_read)
 808                 bch2_time_stats_to_text(out, &ca->io_latency[READ].stats);
 809
 810         if (attr == &sysfs_io_latency_stats_write)
 811                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE].stats);
 812
 813         sysfs_printf(congested,                 "%u%%",
 814                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 815                      * 100 / CONGESTED_MAX);
 816
 817         if (attr == &sysfs_alloc_debug)
 818                 bch2_dev_alloc_debug_to_text(out, ca);
 819
 820         if (attr == &sysfs_open_buckets)
 821                 bch2_open_buckets_to_text(out, c, ca);
 822
 823         return 0;
 824 }
 825
 826 STORE(bch2_dev)
 827 {
 828         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 829         struct bch_fs *c = ca->fs;
 830
 831         if (attr == &sysfs_discard) {
 832                 bool v = strtoul_or_return(buf);
 833
 834                 bch2_opt_set_sb(c, ca, bch2_opt_table + Opt_discard, v);
 835         }
 836
 837         if (attr == &sysfs_durability) {
 838                 u64 v = strtoul_or_return(buf);
 839
 840                 bch2_opt_set_sb(c, ca, bch2_opt_table + Opt_durability, v);
 841         }
 842
 843         if (attr == &sysfs_label) {
 844                 char *tmp;
 845                 int ret;
 846
 847                 tmp = kstrdup(buf, GFP_KERNEL);
 848                 if (!tmp)
 849                         return -ENOMEM;
 850
 851                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 852                 kfree(tmp);
 853                 if (ret)
 854                         return ret;
 855         }
 856
 857         if (attr == &sysfs_io_errors_reset)
 858                 bch2_dev_errors_reset(ca);
 859
 860         return size;
 861 }
 862 SYSFS_OPS(bch2_dev);
 863
 864 struct attribute *bch2_dev_files[] = {
 865         &sysfs_uuid,
 866         &sysfs_bucket_size,
 867         &sysfs_first_bucket,
 868         &sysfs_nbuckets,
 869         &sysfs_durability,
 870
 871         /* settings: */
 872         &sysfs_discard,
 873         &sysfs_state_rw,
 874         &sysfs_label,
 875
 876         &sysfs_has_data,
 877         &sysfs_io_done,
 878         &sysfs_io_errors,
 879         &sysfs_io_errors_reset,
 880
 881         &sysfs_io_latency_read,
 882         &sysfs_io_latency_write,
 883         &sysfs_io_latency_stats_read,
 884         &sysfs_io_latency_stats_write,
 885         &sysfs_congested,
 886
 887         /* debug: */
 888         &sysfs_alloc_debug,
 889         &sysfs_open_buckets,
 890         NULL
 891 };
 892
 893 #endif  /* _BCACHEFS_SYSFS_H_ */