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 read_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(usage_base);
 207
 208 #define x(t, n, ...) read_attribute(t);
 209 BCH_PERSISTENT_COUNTERS()
 210 #undef x
 211
 212 rw_attribute(discard);
 213 read_attribute(state);
 214 rw_attribute(label);
 215
 216 read_attribute(copy_gc_wait);
 217
 218 sysfs_pd_controller_attribute(rebalance);
 219 read_attribute(rebalance_status);
 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 = 0644 };
 235         BCH_TIME_STATS()
 236 #undef x
 237
 238 static size_t bch2_btree_cache_size(struct bch_fs *c)
 239 {
 240         struct btree_cache *bc = &c->btree_cache;
 241         size_t ret = 0;
 242         struct btree *b;
 243
 244         mutex_lock(&bc->lock);
 245         list_for_each_entry(b, &bc->live[0].list, list)
 246                 ret += btree_buf_bytes(b);
 247         list_for_each_entry(b, &bc->live[1].list, list)
 248                 ret += btree_buf_bytes(b);
 249         list_for_each_entry(b, &bc->freeable, list)
 250                 ret += btree_buf_bytes(b);
 251         mutex_unlock(&bc->lock);
 252         return ret;
 253 }
 254
 255 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 256 {
 257         prt_str(out, "type");
 258         printbuf_tabstop_push(out, 12);
 259         printbuf_tabstop_push(out, 16);
 260         printbuf_tabstop_push(out, 16);
 261         printbuf_tabstop_push(out, 24);
 262         prt_printf(out, "type\tcompressed\runcompressed\raverage extent size\r\n");
 263
 264         for (unsigned i = 1; i < BCH_COMPRESSION_TYPE_NR; i++) {
 265                 struct disk_accounting_pos a = {
 266                         .type                   = BCH_DISK_ACCOUNTING_compression,
 267                         .compression.type       = i,
 268                 };
 269                 struct bpos p = disk_accounting_pos_to_bpos(&a);
 270                 u64 v[3];
 271                 bch2_accounting_mem_read(c, p, v, ARRAY_SIZE(v));
 272
 273                 u64 nr_extents                  = v[0];
 274                 u64 sectors_uncompressed        = v[1];
 275                 u64 sectors_compressed          = v[2];
 276
 277                 bch2_prt_compression_type(out, i);
 278                 prt_tab(out);
 279
 280                 prt_human_readable_u64(out, sectors_compressed << 9);
 281                 prt_tab_rjust(out);
 282
 283                 prt_human_readable_u64(out, sectors_uncompressed << 9);
 284                 prt_tab_rjust(out);
 285
 286                 prt_human_readable_u64(out, nr_extents
 287                                        ? div64_u64(sectors_uncompressed << 9, nr_extents)
 288                                        : 0);
 289                 prt_tab_rjust(out);
 290                 prt_newline(out);
 291         }
 292
 293         return 0;
 294 }
 295
 296 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 297 {
 298         bch2_btree_id_to_text(out, c->gc_gens_btree);
 299         prt_printf(out, ": ");
 300         bch2_bpos_to_text(out, c->gc_gens_pos);
 301         prt_printf(out, "\n");
 302 }
 303
 304 static void bch2_fs_usage_base_to_text(struct printbuf *out, struct bch_fs *c)
 305 {
 306         struct bch_fs_usage_base b = {};
 307
 308         acc_u64s_percpu(&b.hidden, &c->usage->hidden, sizeof(b) / sizeof(u64));
 309
 310         prt_printf(out, "hidden:\t\t%llu\n",    b.hidden);
 311         prt_printf(out, "btree:\t\t%llu\n",     b.btree);
 312         prt_printf(out, "data:\t\t%llu\n",      b.data);
 313         prt_printf(out, "cached:\t%llu\n",      b.cached);
 314         prt_printf(out, "reserved:\t\t%llu\n",  b.reserved);
 315         prt_printf(out, "nr_inodes:\t%llu\n",   b.nr_inodes);
 316 }
 317
 318 SHOW(bch2_fs)
 319 {
 320         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 321
 322         sysfs_print(minor,                      c->minor);
 323         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 324
 325         if (attr == &sysfs_flags)
 326                 prt_bitflags(out, bch2_fs_flag_strs, c->flags);
 327
 328         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 329
 330         if (attr == &sysfs_btree_write_stats)
 331                 bch2_btree_write_stats_to_text(out, c);
 332
 333         if (attr == &sysfs_gc_gens_pos)
 334                 bch2_gc_gens_pos_to_text(out, c);
 335
 336         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 337
 338         if (attr == &sysfs_copy_gc_wait)
 339                 bch2_copygc_wait_to_text(out, c);
 340
 341         if (attr == &sysfs_rebalance_status)
 342                 bch2_rebalance_status_to_text(out, c);
 343
 344         /* Debugging: */
 345
 346         if (attr == &sysfs_journal_debug)
 347                 bch2_journal_debug_to_text(out, &c->journal);
 348
 349         if (attr == &sysfs_btree_cache)
 350                 bch2_btree_cache_to_text(out, &c->btree_cache);
 351
 352         if (attr == &sysfs_btree_key_cache)
 353                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 354
 355         if (attr == &sysfs_btree_reserve_cache)
 356                 bch2_btree_reserve_cache_to_text(out, c);
 357
 358         if (attr == &sysfs_stripes_heap)
 359                 bch2_stripes_heap_to_text(out, c);
 360
 361         if (attr == &sysfs_open_buckets)
 362                 bch2_open_buckets_to_text(out, c, NULL);
 363
 364         if (attr == &sysfs_open_buckets_partial)
 365                 bch2_open_buckets_partial_to_text(out, c);
 366
 367         if (attr == &sysfs_write_points)
 368                 bch2_write_points_to_text(out, c);
 369
 370         if (attr == &sysfs_compression_stats)
 371                 bch2_compression_stats_to_text(out, c);
 372
 373         if (attr == &sysfs_new_stripes)
 374                 bch2_new_stripes_to_text(out, c);
 375
 376         if (attr == &sysfs_io_timers_read)
 377                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 378
 379         if (attr == &sysfs_io_timers_write)
 380                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 381
 382         if (attr == &sysfs_moving_ctxts)
 383                 bch2_fs_moving_ctxts_to_text(out, c);
 384
 385 #ifdef BCH_WRITE_REF_DEBUG
 386         if (attr == &sysfs_write_refs)
 387                 bch2_write_refs_to_text(out, c);
 388 #endif
 389
 390         if (attr == &sysfs_nocow_lock_table)
 391                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 392
 393         if (attr == &sysfs_disk_groups)
 394                 bch2_disk_groups_to_text(out, c);
 395
 396         if (attr == &sysfs_alloc_debug)
 397                 bch2_fs_alloc_debug_to_text(out, c);
 398
 399         if (attr == &sysfs_usage_base)
 400                 bch2_fs_usage_base_to_text(out, c);
 401
 402         return 0;
 403 }
 404
 405 STORE(bch2_fs)
 406 {
 407         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 408
 409         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 410
 411         /* Debugging: */
 412
 413         if (!test_bit(BCH_FS_started, &c->flags))
 414                 return -EPERM;
 415
 416         /* Debugging: */
 417
 418         if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs))
 419                 return -EROFS;
 420
 421         if (attr == &sysfs_trigger_btree_cache_shrink) {
 422                 struct btree_cache *bc = &c->btree_cache;
 423                 struct shrink_control sc;
 424
 425                 sc.gfp_mask = GFP_KERNEL;
 426                 sc.nr_to_scan = strtoul_or_return(buf);
 427                 bc->live[0].shrink->scan_objects(bc->live[0].shrink, &sc);
 428         }
 429
 430         if (attr == &sysfs_trigger_btree_key_cache_shrink) {
 431                 struct shrink_control sc;
 432
 433                 sc.gfp_mask = GFP_KERNEL;
 434                 sc.nr_to_scan = strtoul_or_return(buf);
 435                 c->btree_key_cache.shrink->scan_objects(c->btree_key_cache.shrink, &sc);
 436         }
 437
 438         if (attr == &sysfs_trigger_gc)
 439                 bch2_gc_gens(c);
 440
 441         if (attr == &sysfs_trigger_discards)
 442                 bch2_do_discards(c);
 443
 444         if (attr == &sysfs_trigger_invalidates)
 445                 bch2_do_invalidates(c);
 446
 447         if (attr == &sysfs_trigger_journal_flush) {
 448                 bch2_journal_flush_all_pins(&c->journal);
 449                 bch2_journal_meta(&c->journal);
 450         }
 451
 452         if (attr == &sysfs_trigger_journal_writes)
 453                 bch2_journal_do_writes(&c->journal);
 454
 455         if (attr == &sysfs_trigger_freelist_wakeup)
 456                 closure_wake_up(&c->freelist_wait);
 457
 458 #ifdef CONFIG_BCACHEFS_TESTS
 459         if (attr == &sysfs_perf_test) {
 460                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 461                 char *test              = strsep(&p, " \t\n");
 462                 char *nr_str            = strsep(&p, " \t\n");
 463                 char *threads_str       = strsep(&p, " \t\n");
 464                 unsigned threads;
 465                 u64 nr;
 466                 int ret = -EINVAL;
 467
 468                 if (threads_str &&
 469                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 470                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 471                         ret = bch2_btree_perf_test(c, test, nr, threads);
 472                 kfree(tmp);
 473
 474                 if (ret)
 475                         size = ret;
 476         }
 477 #endif
 478         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 479         return size;
 480 }
 481 SYSFS_OPS(bch2_fs);
 482
 483 struct attribute *bch2_fs_files[] = {
 484         &sysfs_minor,
 485         &sysfs_btree_cache_size,
 486         &sysfs_btree_write_stats,
 487
 488         &sysfs_rebalance_status,
 489
 490         &sysfs_compression_stats,
 491
 492 #ifdef CONFIG_BCACHEFS_TESTS
 493         &sysfs_perf_test,
 494 #endif
 495         NULL
 496 };
 497
 498 /* counters dir */
 499
 500 SHOW(bch2_fs_counters)
 501 {
 502         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 503         u64 counter = 0;
 504         u64 counter_since_mount = 0;
 505
 506         printbuf_tabstop_push(out, 32);
 507
 508         #define x(t, n, f, ...) \
 509                 if (attr == &sysfs_##t) {                                       \
 510                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 511                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 512                         if (f & TYPE_SECTORS) {                                 \
 513                                 counter <<= 9;                                  \
 514                                 counter_since_mount <<= 9;                      \
 515                         }                                                       \
 516                                                                                 \
 517                         prt_printf(out, "since mount:\t");                      \
 518                         (f & TYPE_COUNTER) ? prt_u64(out, counter_since_mount) :\
 519                         prt_human_readable_u64(out, counter_since_mount);       \
 520                         prt_newline(out);                                       \
 521                                                                                 \
 522                         prt_printf(out, "since filesystem creation:\t");        \
 523                         (f & TYPE_COUNTER) ? prt_u64(out, counter) :            \
 524                         prt_human_readable_u64(out, counter);                   \
 525                         prt_newline(out);                                       \
 526                 }
 527         BCH_PERSISTENT_COUNTERS()
 528         #undef x
 529         return 0;
 530 }
 531
 532 STORE(bch2_fs_counters) {
 533         return 0;
 534 }
 535
 536 SYSFS_OPS(bch2_fs_counters);
 537
 538 struct attribute *bch2_fs_counters_files[] = {
 539 #define x(t, ...) \
 540         &sysfs_##t,
 541         BCH_PERSISTENT_COUNTERS()
 542 #undef x
 543         NULL
 544 };
 545 /* internal dir - just a wrapper */
 546
 547 SHOW(bch2_fs_internal)
 548 {
 549         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 550
 551         return bch2_fs_to_text(out, &c->kobj, attr);
 552 }
 553
 554 STORE(bch2_fs_internal)
 555 {
 556         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 557
 558         return bch2_fs_store(&c->kobj, attr, buf, size);
 559 }
 560 SYSFS_OPS(bch2_fs_internal);
 561
 562 struct attribute *bch2_fs_internal_files[] = {
 563         &sysfs_flags,
 564         &sysfs_journal_debug,
 565         &sysfs_btree_cache,
 566         &sysfs_btree_key_cache,
 567         &sysfs_btree_reserve_cache,
 568         &sysfs_new_stripes,
 569         &sysfs_stripes_heap,
 570         &sysfs_open_buckets,
 571         &sysfs_open_buckets_partial,
 572         &sysfs_write_points,
 573 #ifdef BCH_WRITE_REF_DEBUG
 574         &sysfs_write_refs,
 575 #endif
 576         &sysfs_nocow_lock_table,
 577         &sysfs_io_timers_read,
 578         &sysfs_io_timers_write,
 579
 580         &sysfs_trigger_gc,
 581         &sysfs_trigger_discards,
 582         &sysfs_trigger_invalidates,
 583         &sysfs_trigger_journal_flush,
 584         &sysfs_trigger_journal_writes,
 585         &sysfs_trigger_btree_cache_shrink,
 586         &sysfs_trigger_btree_key_cache_shrink,
 587         &sysfs_trigger_freelist_wakeup,
 588
 589         &sysfs_gc_gens_pos,
 590
 591         &sysfs_copy_gc_wait,
 592
 593         sysfs_pd_controller_files(rebalance),
 594
 595         &sysfs_moving_ctxts,
 596
 597         &sysfs_internal_uuid,
 598
 599         &sysfs_disk_groups,
 600         &sysfs_alloc_debug,
 601         &sysfs_usage_base,
 602         NULL
 603 };
 604
 605 /* options */
 606
 607 SHOW(bch2_fs_opts_dir)
 608 {
 609         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 610         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 611         int id = opt - bch2_opt_table;
 612         u64 v = bch2_opt_get_by_id(&c->opts, id);
 613
 614         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 615         prt_char(out, '\n');
 616
 617         return 0;
 618 }
 619
 620 STORE(bch2_fs_opts_dir)
 621 {
 622         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 623         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 624         int ret, id = opt - bch2_opt_table;
 625         char *tmp;
 626         u64 v;
 627
 628         /*
 629          * We don't need to take c->writes for correctness, but it eliminates an
 630          * unsightly error message in the dmesg log when we're RO:
 631          */
 632         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 633                 return -EROFS;
 634
 635         tmp = kstrdup(buf, GFP_KERNEL);
 636         if (!tmp) {
 637                 ret = -ENOMEM;
 638                 goto err;
 639         }
 640
 641         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 642         kfree(tmp);
 643
 644         if (ret < 0)
 645                 goto err;
 646
 647         ret = bch2_opt_check_may_set(c, id, v);
 648         if (ret < 0)
 649                 goto err;
 650
 651         bch2_opt_set_sb(c, NULL, opt, v);
 652         bch2_opt_set_by_id(&c->opts, id, v);
 653
 654         if (v &&
 655             (id == Opt_background_target ||
 656              id == Opt_background_compression ||
 657              (id == Opt_compression && !c->opts.background_compression)))
 658                 bch2_set_rebalance_needs_scan(c, 0);
 659
 660         if (v && id == Opt_rebalance_enabled)
 661                 rebalance_wakeup(c);
 662
 663         if (v && id == Opt_copygc_enabled &&
 664             c->copygc_thread)
 665                 wake_up_process(c->copygc_thread);
 666
 667         ret = size;
 668 err:
 669         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 670         return ret;
 671 }
 672 SYSFS_OPS(bch2_fs_opts_dir);
 673
 674 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 675
 676 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 677 {
 678         const struct bch_option *i;
 679         int ret;
 680
 681         for (i = bch2_opt_table;
 682              i < bch2_opt_table + bch2_opts_nr;
 683              i++) {
 684                 if (!(i->flags & OPT_FS))
 685                         continue;
 686
 687                 ret = sysfs_create_file(kobj, &i->attr);
 688                 if (ret)
 689                         return ret;
 690         }
 691
 692         return 0;
 693 }
 694
 695 /* time stats */
 696
 697 SHOW(bch2_fs_time_stats)
 698 {
 699         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 700
 701 #define x(name)                                                         \
 702         if (attr == &sysfs_time_stat_##name)                            \
 703                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 704         BCH_TIME_STATS()
 705 #undef x
 706
 707         return 0;
 708 }
 709
 710 STORE(bch2_fs_time_stats)
 711 {
 712         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 713
 714 #define x(name)                                                         \
 715         if (attr == &sysfs_time_stat_##name)                            \
 716                 bch2_time_stats_reset(&c->times[BCH_TIME_##name]);
 717         BCH_TIME_STATS()
 718 #undef x
 719         return size;
 720 }
 721 SYSFS_OPS(bch2_fs_time_stats);
 722
 723 struct attribute *bch2_fs_time_stats_files[] = {
 724 #define x(name)                                         \
 725         &sysfs_time_stat_##name,
 726         BCH_TIME_STATS()
 727 #undef x
 728         NULL
 729 };
 730
 731 static const char * const bch2_rw[] = {
 732         "read",
 733         "write",
 734         NULL
 735 };
 736
 737 static void dev_io_done_to_text(struct printbuf *out, struct bch_dev *ca)
 738 {
 739         int rw, i;
 740
 741         for (rw = 0; rw < 2; rw++) {
 742                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 743
 744                 for (i = 1; i < BCH_DATA_NR; i++)
 745                         prt_printf(out, "%-12s:%12llu\n",
 746                                bch2_data_type_str(i),
 747                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 748         }
 749 }
 750
 751 SHOW(bch2_dev)
 752 {
 753         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 754         struct bch_fs *c = ca->fs;
 755
 756         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 757
 758         sysfs_print(bucket_size,        bucket_bytes(ca));
 759         sysfs_print(first_bucket,       ca->mi.first_bucket);
 760         sysfs_print(nbuckets,           ca->mi.nbuckets);
 761         sysfs_print(durability,         ca->mi.durability);
 762         sysfs_print(discard,            ca->mi.discard);
 763
 764         if (attr == &sysfs_label) {
 765                 if (ca->mi.group)
 766                         bch2_disk_path_to_text(out, c, ca->mi.group - 1);
 767                 prt_char(out, '\n');
 768         }
 769
 770         if (attr == &sysfs_has_data) {
 771                 prt_bitflags(out, __bch2_data_types, bch2_dev_has_data(c, ca));
 772                 prt_char(out, '\n');
 773         }
 774
 775         if (attr == &sysfs_state) {
 776                 prt_string_option(out, bch2_member_states, ca->mi.state);
 777                 prt_char(out, '\n');
 778         }
 779
 780         if (attr == &sysfs_io_done)
 781                 dev_io_done_to_text(out, ca);
 782
 783         if (attr == &sysfs_io_errors)
 784                 bch2_dev_io_errors_to_text(out, ca);
 785
 786         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 787         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 788
 789         if (attr == &sysfs_io_latency_stats_read)
 790                 bch2_time_stats_to_text(out, &ca->io_latency[READ].stats);
 791
 792         if (attr == &sysfs_io_latency_stats_write)
 793                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE].stats);
 794
 795         sysfs_printf(congested,                 "%u%%",
 796                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 797                      * 100 / CONGESTED_MAX);
 798
 799         if (attr == &sysfs_alloc_debug)
 800                 bch2_dev_alloc_debug_to_text(out, ca);
 801
 802         if (attr == &sysfs_open_buckets)
 803                 bch2_open_buckets_to_text(out, c, ca);
 804
 805         return 0;
 806 }
 807
 808 STORE(bch2_dev)
 809 {
 810         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 811         struct bch_fs *c = ca->fs;
 812
 813         if (attr == &sysfs_discard) {
 814                 bool v = strtoul_or_return(buf);
 815
 816                 bch2_opt_set_sb(c, ca, bch2_opt_table + Opt_discard, v);
 817         }
 818
 819         if (attr == &sysfs_durability) {
 820                 u64 v = strtoul_or_return(buf);
 821
 822                 bch2_opt_set_sb(c, ca, bch2_opt_table + Opt_durability, v);
 823         }
 824
 825         if (attr == &sysfs_label) {
 826                 char *tmp;
 827                 int ret;
 828
 829                 tmp = kstrdup(buf, GFP_KERNEL);
 830                 if (!tmp)
 831                         return -ENOMEM;
 832
 833                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 834                 kfree(tmp);
 835                 if (ret)
 836                         return ret;
 837         }
 838
 839         if (attr == &sysfs_io_errors_reset)
 840                 bch2_dev_errors_reset(ca);
 841
 842         return size;
 843 }
 844 SYSFS_OPS(bch2_dev);
 845
 846 struct attribute *bch2_dev_files[] = {
 847         &sysfs_uuid,
 848         &sysfs_bucket_size,
 849         &sysfs_first_bucket,
 850         &sysfs_nbuckets,
 851         &sysfs_durability,
 852
 853         /* settings: */
 854         &sysfs_discard,
 855         &sysfs_state,
 856         &sysfs_label,
 857
 858         &sysfs_has_data,
 859         &sysfs_io_done,
 860         &sysfs_io_errors,
 861         &sysfs_io_errors_reset,
 862
 863         &sysfs_io_latency_read,
 864         &sysfs_io_latency_write,
 865         &sysfs_io_latency_stats_read,
 866         &sysfs_io_latency_stats_write,
 867         &sysfs_congested,
 868
 869         /* debug: */
 870         &sysfs_alloc_debug,
 871         &sysfs_open_buckets,
 872         NULL
 873 };
 874
 875 #endif  /* _BCACHEFS_SYSFS_H_ */