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 "opts.h"
  31 #include "rebalance.h"
  32 #include "replicas.h"
  33 #include "super-io.h"
  34 #include "tests.h"
  35
  36 #include <linux/blkdev.h>
  37 #include <linux/pretty-printers.h>
  38 #include <linux/sort.h>
  39 #include <linux/sched/clock.h>
  40
  41 #include "util.h"
  42
  43 #define SYSFS_OPS(type)                                                 \
  44 const struct sysfs_ops type ## _sysfs_ops = {                           \
  45         .show   = type ## _show,                                        \
  46         .store  = type ## _store                                        \
  47 }
  48
  49 #define SHOW(fn)                                                        \
  50 static ssize_t fn ## _to_text(struct printbuf *,                        \
  51                               struct kobject *, struct attribute *);    \
  52                                                                         \
  53 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  54                            char *buf)                                   \
  55 {                                                                       \
  56         struct printbuf out = PRINTBUF;                                 \
  57         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  58                                                                         \
  59         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  60                 prt_newline(&out);                                      \
  61                                                                         \
  62         if (!ret && out.allocation_failure)                             \
  63                 ret = -ENOMEM;                                          \
  64                                                                         \
  65         if (!ret) {                                                     \
  66                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  67                 memcpy(buf, out.buf, ret);                              \
  68         }                                                               \
  69         printbuf_exit(&out);                                            \
  70         return bch2_err_class(ret);                                     \
  71 }                                                                       \
  72                                                                         \
  73 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  74                               struct attribute *attr)
  75
  76 #define STORE(fn)                                                       \
  77 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
  78                             const char *, size_t);                      \
  79                                                                         \
  80 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  81                             const char *buf, size_t size)               \
  82 {                                                                       \
  83         return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
  84 }                                                                       \
  85                                                                         \
  86 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
  87                                   const char *buf, size_t size)
  88
  89 #define __sysfs_attribute(_name, _mode)                                 \
  90         static struct attribute sysfs_##_name =                         \
  91                 { .name = #_name, .mode = _mode }
  92
  93 #define write_attribute(n)      __sysfs_attribute(n, S_IWUSR)
  94 #define read_attribute(n)       __sysfs_attribute(n, S_IRUGO)
  95 #define rw_attribute(n)         __sysfs_attribute(n, S_IRUGO|S_IWUSR)
  96
  97 #define sysfs_printf(file, fmt, ...)                                    \
  98 do {                                                                    \
  99         if (attr == &sysfs_ ## file)                                    \
 100                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
 101 } while (0)
 102
 103 #define sysfs_print(file, var)                                          \
 104 do {                                                                    \
 105         if (attr == &sysfs_ ## file)                                    \
 106                 snprint(out, var);                                      \
 107 } while (0)
 108
 109 #define sysfs_hprint(file, val)                                         \
 110 do {                                                                    \
 111         if (attr == &sysfs_ ## file)                                    \
 112                 prt_human_readable_s64(out, val);                       \
 113 } while (0)
 114
 115 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 116 #define var_print(_var)         sysfs_print(_var, var(_var))
 117 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 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 #define strtoul_restrict_or_return(cp, min, max)                        \
 142 ({                                                                      \
 143         unsigned long __v = 0;                                          \
 144         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 145         if (_r)                                                         \
 146                 return _r;                                              \
 147         __v;                                                            \
 148 })
 149
 150 #define strtoi_h_or_return(cp)                                          \
 151 ({                                                                      \
 152         u64 _v;                                                         \
 153         int _r = strtoi_h(cp, &_v);                                     \
 154         if (_r)                                                         \
 155                 return _r;                                              \
 156         _v;                                                             \
 157 })
 158
 159 #define sysfs_hatoi(file, var)                                          \
 160 do {                                                                    \
 161         if (attr == &sysfs_ ## file)                                    \
 162                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 163 } while (0)
 164
 165 write_attribute(trigger_gc);
 166 write_attribute(trigger_discards);
 167 write_attribute(trigger_invalidates);
 168 write_attribute(prune_cache);
 169 write_attribute(btree_wakeup);
 170 rw_attribute(btree_gc_periodic);
 171 rw_attribute(gc_gens_pos);
 172
 173 read_attribute(uuid);
 174 read_attribute(minor);
 175 read_attribute(bucket_size);
 176 read_attribute(first_bucket);
 177 read_attribute(nbuckets);
 178 read_attribute(durability);
 179 read_attribute(iodone);
 180
 181 read_attribute(io_latency_read);
 182 read_attribute(io_latency_write);
 183 read_attribute(io_latency_stats_read);
 184 read_attribute(io_latency_stats_write);
 185 read_attribute(congested);
 186
 187 read_attribute(btree_avg_write_size);
 188
 189 read_attribute(btree_cache_size);
 190 read_attribute(compression_stats);
 191 read_attribute(journal_debug);
 192 read_attribute(btree_updates);
 193 read_attribute(btree_cache);
 194 read_attribute(btree_key_cache);
 195 read_attribute(stripes_heap);
 196 read_attribute(open_buckets);
 197
 198 read_attribute(internal_uuid);
 199
 200 read_attribute(has_data);
 201 read_attribute(alloc_debug);
 202
 203 #define x(t, n, ...) read_attribute(t);
 204 BCH_PERSISTENT_COUNTERS()
 205 #undef x
 206
 207 rw_attribute(discard);
 208 rw_attribute(label);
 209
 210 rw_attribute(copy_gc_enabled);
 211 read_attribute(copy_gc_wait);
 212
 213 rw_attribute(rebalance_enabled);
 214 sysfs_pd_controller_attribute(rebalance);
 215 read_attribute(rebalance_work);
 216 rw_attribute(promote_whole_extents);
 217
 218 read_attribute(new_stripes);
 219
 220 read_attribute(io_timers_read);
 221 read_attribute(io_timers_write);
 222
 223 read_attribute(data_jobs);
 224
 225 #ifdef CONFIG_BCACHEFS_TESTS
 226 write_attribute(perf_test);
 227 #endif /* CONFIG_BCACHEFS_TESTS */
 228
 229 #define x(_name)                                                \
 230         static struct attribute sysfs_time_stat_##_name =               \
 231                 { .name = #_name, .mode = S_IRUGO };
 232         BCH_TIME_STATS()
 233 #undef x
 234
 235 static struct attribute sysfs_state_rw = {
 236         .name = "state",
 237         .mode = S_IRUGO
 238 };
 239
 240 static size_t bch2_btree_cache_size(struct bch_fs *c)
 241 {
 242         size_t ret = 0;
 243         struct btree *b;
 244
 245         mutex_lock(&c->btree_cache.lock);
 246         list_for_each_entry(b, &c->btree_cache.live, list)
 247                 ret += btree_bytes(c);
 248
 249         mutex_unlock(&c->btree_cache.lock);
 250         return ret;
 251 }
 252
 253 static size_t bch2_btree_avg_write_size(struct bch_fs *c)
 254 {
 255         u64 nr = atomic64_read(&c->btree_writes_nr);
 256         u64 sectors = atomic64_read(&c->btree_writes_sectors);
 257
 258         return nr ? div64_u64(sectors, nr) : 0;
 259 }
 260
 261 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 262 {
 263         long ret = 0;
 264         struct bch_move_stats *stats;
 265
 266         mutex_lock(&c->data_progress_lock);
 267         list_for_each_entry(stats, &c->data_progress_list, list) {
 268                 prt_printf(out, "%s: data type %s btree_id %s position: ",
 269                        stats->name,
 270                        bch2_data_types[stats->data_type],
 271                        bch2_btree_ids[stats->btree_id]);
 272                 bch2_bpos_to_text(out, stats->pos);
 273                 prt_printf(out, "%s", "\n");
 274         }
 275
 276         mutex_unlock(&c->data_progress_lock);
 277         return ret;
 278 }
 279
 280 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 281 {
 282         struct btree_trans trans;
 283         struct btree_iter iter;
 284         struct bkey_s_c k;
 285         enum btree_id id;
 286         u64 nr_uncompressed_extents = 0,
 287             nr_compressed_extents = 0,
 288             nr_incompressible_extents = 0,
 289             uncompressed_sectors = 0,
 290             incompressible_sectors = 0,
 291             compressed_sectors_compressed = 0,
 292             compressed_sectors_uncompressed = 0;
 293         int ret;
 294
 295         if (!test_bit(BCH_FS_STARTED, &c->flags))
 296                 return -EPERM;
 297
 298         bch2_trans_init(&trans, c, 0, 0);
 299
 300         for (id = 0; id < BTREE_ID_NR; id++) {
 301                 if (!((1U << id) & BTREE_ID_HAS_PTRS))
 302                         continue;
 303
 304                 for_each_btree_key(&trans, iter, id, POS_MIN,
 305                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 306                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 307                         const union bch_extent_entry *entry;
 308                         struct extent_ptr_decoded p;
 309                         bool compressed = false, uncompressed = false, incompressible = false;
 310
 311                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 312                                 switch (p.crc.compression_type) {
 313                                 case BCH_COMPRESSION_TYPE_none:
 314                                         uncompressed = true;
 315                                         uncompressed_sectors += k.k->size;
 316                                         break;
 317                                 case BCH_COMPRESSION_TYPE_incompressible:
 318                                         incompressible = true;
 319                                         incompressible_sectors += k.k->size;
 320                                         break;
 321                                 default:
 322                                         compressed_sectors_compressed +=
 323                                                 p.crc.compressed_size;
 324                                         compressed_sectors_uncompressed +=
 325                                                 p.crc.uncompressed_size;
 326                                         compressed = true;
 327                                         break;
 328                                 }
 329                         }
 330
 331                         if (incompressible)
 332                                 nr_incompressible_extents++;
 333                         else if (uncompressed)
 334                                 nr_uncompressed_extents++;
 335                         else if (compressed)
 336                                 nr_compressed_extents++;
 337                 }
 338                 bch2_trans_iter_exit(&trans, &iter);
 339         }
 340
 341         bch2_trans_exit(&trans);
 342
 343         if (ret)
 344                 return ret;
 345
 346         prt_printf(out, "uncompressed:\n");
 347         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 348         prt_printf(out, "       size:                   ");
 349         prt_human_readable_u64(out, uncompressed_sectors << 9);
 350         prt_printf(out, "\n");
 351
 352         prt_printf(out, "compressed:\n");
 353         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 354         prt_printf(out, "       compressed size:        ");
 355         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 356         prt_printf(out, "\n");
 357         prt_printf(out, "       uncompressed size:      ");
 358         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 359         prt_printf(out, "\n");
 360
 361         prt_printf(out, "incompressible:\n");
 362         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 363         prt_printf(out, "       size:                   ");
 364         prt_human_readable_u64(out, incompressible_sectors << 9);
 365         prt_printf(out, "\n");
 366         return 0;
 367 }
 368
 369 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 370 {
 371         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 372         bch2_bpos_to_text(out, c->gc_gens_pos);
 373         prt_printf(out, "\n");
 374 }
 375
 376 static void bch2_btree_wakeup_all(struct bch_fs *c)
 377 {
 378         struct btree_trans *trans;
 379
 380         mutex_lock(&c->btree_trans_lock);
 381         list_for_each_entry(trans, &c->btree_trans_list, list) {
 382                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 383
 384                 if (b)
 385                         six_lock_wakeup_all(&b->lock);
 386
 387         }
 388         mutex_unlock(&c->btree_trans_lock);
 389 }
 390
 391 SHOW(bch2_fs)
 392 {
 393         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 394
 395         sysfs_print(minor,                      c->minor);
 396         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 397
 398         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 399         sysfs_hprint(btree_avg_write_size,      bch2_btree_avg_write_size(c));
 400
 401         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 402
 403         if (attr == &sysfs_gc_gens_pos)
 404                 bch2_gc_gens_pos_to_text(out, c);
 405
 406         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 407
 408         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 409         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 410         sysfs_hprint(copy_gc_wait,
 411                      max(0LL, c->copygc_wait -
 412                          atomic64_read(&c->io_clock[WRITE].now)) << 9);
 413
 414         if (attr == &sysfs_rebalance_work)
 415                 bch2_rebalance_work_to_text(out, c);
 416
 417         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 418
 419         /* Debugging: */
 420
 421         if (attr == &sysfs_journal_debug)
 422                 bch2_journal_debug_to_text(out, &c->journal);
 423
 424         if (attr == &sysfs_btree_updates)
 425                 bch2_btree_updates_to_text(out, c);
 426
 427         if (attr == &sysfs_btree_cache)
 428                 bch2_btree_cache_to_text(out, c);
 429
 430         if (attr == &sysfs_btree_key_cache)
 431                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 432
 433         if (attr == &sysfs_stripes_heap)
 434                 bch2_stripes_heap_to_text(out, c);
 435
 436         if (attr == &sysfs_open_buckets)
 437                 bch2_open_buckets_to_text(out, c);
 438
 439         if (attr == &sysfs_compression_stats)
 440                 bch2_compression_stats_to_text(out, c);
 441
 442         if (attr == &sysfs_new_stripes)
 443                 bch2_new_stripes_to_text(out, c);
 444
 445         if (attr == &sysfs_io_timers_read)
 446                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 447
 448         if (attr == &sysfs_io_timers_write)
 449                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 450
 451         if (attr == &sysfs_data_jobs)
 452                 data_progress_to_text(out, c);
 453
 454         return 0;
 455 }
 456
 457 STORE(bch2_fs)
 458 {
 459         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 460
 461         if (attr == &sysfs_btree_gc_periodic) {
 462                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 463                         ?: (ssize_t) size;
 464
 465                 wake_up_process(c->gc_thread);
 466                 return ret;
 467         }
 468
 469         if (attr == &sysfs_copy_gc_enabled) {
 470                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 471                         ?: (ssize_t) size;
 472
 473                 if (c->copygc_thread)
 474                         wake_up_process(c->copygc_thread);
 475                 return ret;
 476         }
 477
 478         if (attr == &sysfs_rebalance_enabled) {
 479                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 480                         ?: (ssize_t) size;
 481
 482                 rebalance_wakeup(c);
 483                 return ret;
 484         }
 485
 486         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 487
 488         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 489
 490         /* Debugging: */
 491
 492         if (!test_bit(BCH_FS_STARTED, &c->flags))
 493                 return -EPERM;
 494
 495         /* Debugging: */
 496
 497         if (!test_bit(BCH_FS_RW, &c->flags))
 498                 return -EROFS;
 499
 500         if (attr == &sysfs_prune_cache) {
 501                 struct shrink_control sc;
 502
 503                 sc.gfp_mask = GFP_KERNEL;
 504                 sc.nr_to_scan = strtoul_or_return(buf);
 505                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 506         }
 507
 508         if (attr == &sysfs_btree_wakeup)
 509                 bch2_btree_wakeup_all(c);
 510
 511         if (attr == &sysfs_trigger_gc) {
 512                 /*
 513                  * Full gc is currently incompatible with btree key cache:
 514                  */
 515 #if 0
 516                 down_read(&c->state_lock);
 517                 bch2_gc(c, false, false);
 518                 up_read(&c->state_lock);
 519 #else
 520                 bch2_gc_gens(c);
 521 #endif
 522         }
 523
 524         if (attr == &sysfs_trigger_discards)
 525                 bch2_do_discards(c);
 526
 527         if (attr == &sysfs_trigger_invalidates)
 528                 bch2_do_invalidates(c);
 529
 530 #ifdef CONFIG_BCACHEFS_TESTS
 531         if (attr == &sysfs_perf_test) {
 532                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 533                 char *test              = strsep(&p, " \t\n");
 534                 char *nr_str            = strsep(&p, " \t\n");
 535                 char *threads_str       = strsep(&p, " \t\n");
 536                 unsigned threads;
 537                 u64 nr;
 538                 int ret = -EINVAL;
 539
 540                 if (threads_str &&
 541                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 542                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 543                         ret = bch2_btree_perf_test(c, test, nr, threads);
 544                 kfree(tmp);
 545
 546                 if (ret)
 547                         size = ret;
 548         }
 549 #endif
 550         return size;
 551 }
 552 SYSFS_OPS(bch2_fs);
 553
 554 struct attribute *bch2_fs_files[] = {
 555         &sysfs_minor,
 556         &sysfs_btree_cache_size,
 557         &sysfs_btree_avg_write_size,
 558
 559         &sysfs_promote_whole_extents,
 560
 561         &sysfs_compression_stats,
 562
 563 #ifdef CONFIG_BCACHEFS_TESTS
 564         &sysfs_perf_test,
 565 #endif
 566         NULL
 567 };
 568
 569 /* counters dir */
 570
 571 SHOW(bch2_fs_counters)
 572 {
 573         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 574         u64 counter = 0;
 575         u64 counter_since_mount = 0;
 576
 577         printbuf_tabstop_push(out, 32);
 578
 579         #define x(t, ...) \
 580                 if (attr == &sysfs_##t) {                                       \
 581                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 582                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 583                         prt_printf(out, "since mount:");                                \
 584                         prt_tab(out);                                           \
 585                         prt_human_readable_u64(out, counter_since_mount << 9);  \
 586                         prt_newline(out);                                       \
 587                                                                                 \
 588                         prt_printf(out, "since filesystem creation:");          \
 589                         prt_tab(out);                                           \
 590                         prt_human_readable_u64(out, counter << 9);              \
 591                         prt_newline(out);                                       \
 592                 }
 593         BCH_PERSISTENT_COUNTERS()
 594         #undef x
 595         return 0;
 596 }
 597
 598 STORE(bch2_fs_counters) {
 599         return 0;
 600 }
 601
 602 SYSFS_OPS(bch2_fs_counters);
 603
 604 struct attribute *bch2_fs_counters_files[] = {
 605 #define x(t, ...) \
 606         &sysfs_##t,
 607         BCH_PERSISTENT_COUNTERS()
 608 #undef x
 609         NULL
 610 };
 611 /* internal dir - just a wrapper */
 612
 613 SHOW(bch2_fs_internal)
 614 {
 615         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 616         return bch2_fs_to_text(out, &c->kobj, attr);
 617 }
 618
 619 STORE(bch2_fs_internal)
 620 {
 621         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 622         return bch2_fs_store(&c->kobj, attr, buf, size);
 623 }
 624 SYSFS_OPS(bch2_fs_internal);
 625
 626 struct attribute *bch2_fs_internal_files[] = {
 627         &sysfs_journal_debug,
 628         &sysfs_btree_updates,
 629         &sysfs_btree_cache,
 630         &sysfs_btree_key_cache,
 631         &sysfs_new_stripes,
 632         &sysfs_stripes_heap,
 633         &sysfs_open_buckets,
 634         &sysfs_io_timers_read,
 635         &sysfs_io_timers_write,
 636
 637         &sysfs_trigger_gc,
 638         &sysfs_trigger_discards,
 639         &sysfs_trigger_invalidates,
 640         &sysfs_prune_cache,
 641         &sysfs_btree_wakeup,
 642
 643         &sysfs_gc_gens_pos,
 644
 645         &sysfs_copy_gc_enabled,
 646         &sysfs_copy_gc_wait,
 647
 648         &sysfs_rebalance_enabled,
 649         &sysfs_rebalance_work,
 650         sysfs_pd_controller_files(rebalance),
 651
 652         &sysfs_data_jobs,
 653
 654         &sysfs_internal_uuid,
 655         NULL
 656 };
 657
 658 /* options */
 659
 660 SHOW(bch2_fs_opts_dir)
 661 {
 662         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 663         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 664         int id = opt - bch2_opt_table;
 665         u64 v = bch2_opt_get_by_id(&c->opts, id);
 666
 667         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 668         prt_char(out, '\n');
 669
 670         return 0;
 671 }
 672
 673 STORE(bch2_fs_opts_dir)
 674 {
 675         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 676         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 677         int ret, id = opt - bch2_opt_table;
 678         char *tmp;
 679         u64 v;
 680
 681         /*
 682          * We don't need to take c->writes for correctness, but it eliminates an
 683          * unsightly error message in the dmesg log when we're RO:
 684          */
 685         if (unlikely(!percpu_ref_tryget_live(&c->writes)))
 686                 return -EROFS;
 687
 688         tmp = kstrdup(buf, GFP_KERNEL);
 689         if (!tmp) {
 690                 ret = -ENOMEM;
 691                 goto err;
 692         }
 693
 694         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 695         kfree(tmp);
 696
 697         if (ret < 0)
 698                 goto err;
 699
 700         ret = bch2_opt_check_may_set(c, id, v);
 701         if (ret < 0)
 702                 goto err;
 703
 704         bch2_opt_set_sb(c, opt, v);
 705         bch2_opt_set_by_id(&c->opts, id, v);
 706
 707         if ((id == Opt_background_target ||
 708              id == Opt_background_compression) && v) {
 709                 bch2_rebalance_add_work(c, S64_MAX);
 710                 rebalance_wakeup(c);
 711         }
 712
 713         ret = size;
 714 err:
 715         percpu_ref_put(&c->writes);
 716         return ret;
 717 }
 718 SYSFS_OPS(bch2_fs_opts_dir);
 719
 720 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 721
 722 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 723 {
 724         const struct bch_option *i;
 725         int ret;
 726
 727         for (i = bch2_opt_table;
 728              i < bch2_opt_table + bch2_opts_nr;
 729              i++) {
 730                 if (!(i->flags & OPT_FS))
 731                         continue;
 732
 733                 ret = sysfs_create_file(kobj, &i->attr);
 734                 if (ret)
 735                         return ret;
 736         }
 737
 738         return 0;
 739 }
 740
 741 /* time stats */
 742
 743 SHOW(bch2_fs_time_stats)
 744 {
 745         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 746
 747 #define x(name)                                                         \
 748         if (attr == &sysfs_time_stat_##name)                            \
 749                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 750         BCH_TIME_STATS()
 751 #undef x
 752
 753         return 0;
 754 }
 755
 756 STORE(bch2_fs_time_stats)
 757 {
 758         return size;
 759 }
 760 SYSFS_OPS(bch2_fs_time_stats);
 761
 762 struct attribute *bch2_fs_time_stats_files[] = {
 763 #define x(name)                                         \
 764         &sysfs_time_stat_##name,
 765         BCH_TIME_STATS()
 766 #undef x
 767         NULL
 768 };
 769
 770 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 771 {
 772         struct bch_fs *c = ca->fs;
 773         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 774         unsigned i, nr[BCH_DATA_NR];
 775
 776         memset(nr, 0, sizeof(nr));
 777
 778         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 779                 nr[c->open_buckets[i].data_type]++;
 780
 781         prt_printf(out,
 782                "\t\t\t buckets\t sectors      fragmented\n"
 783                "capacity\t%16llu\n",
 784                ca->mi.nbuckets - ca->mi.first_bucket);
 785
 786         for (i = 0; i < BCH_DATA_NR; i++)
 787                 prt_printf(out, "%-16s%16llu%16llu%16llu\n",
 788                        bch2_data_types[i], stats.d[i].buckets,
 789                        stats.d[i].sectors, stats.d[i].fragmented);
 790
 791         prt_printf(out,
 792                "ec\t\t%16llu\n"
 793                "\n"
 794                "freelist_wait\t\t%s\n"
 795                "open buckets allocated\t%u\n"
 796                "open buckets this dev\t%u\n"
 797                "open buckets total\t%u\n"
 798                "open_buckets_wait\t%s\n"
 799                "open_buckets_btree\t%u\n"
 800                "open_buckets_user\t%u\n"
 801                "buckets_to_invalidate\t%llu\n"
 802                "btree reserve cache\t%u\n",
 803                stats.buckets_ec,
 804                c->freelist_wait.list.first              ? "waiting" : "empty",
 805                OPEN_BUCKETS_COUNT - c->open_buckets_nr_free,
 806                ca->nr_open_buckets,
 807                OPEN_BUCKETS_COUNT,
 808                c->open_buckets_wait.list.first          ? "waiting" : "empty",
 809                nr[BCH_DATA_btree],
 810                nr[BCH_DATA_user],
 811                should_invalidate_buckets(ca, stats),
 812                c->btree_reserve_cache_nr);
 813 }
 814
 815 static const char * const bch2_rw[] = {
 816         "read",
 817         "write",
 818         NULL
 819 };
 820
 821 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 822 {
 823         int rw, i;
 824
 825         for (rw = 0; rw < 2; rw++) {
 826                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 827
 828                 for (i = 1; i < BCH_DATA_NR; i++)
 829                         prt_printf(out, "%-12s:%12llu\n",
 830                                bch2_data_types[i],
 831                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 832         }
 833 }
 834
 835 SHOW(bch2_dev)
 836 {
 837         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 838         struct bch_fs *c = ca->fs;
 839
 840         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 841
 842         sysfs_print(bucket_size,        bucket_bytes(ca));
 843         sysfs_print(first_bucket,       ca->mi.first_bucket);
 844         sysfs_print(nbuckets,           ca->mi.nbuckets);
 845         sysfs_print(durability,         ca->mi.durability);
 846         sysfs_print(discard,            ca->mi.discard);
 847
 848         if (attr == &sysfs_label) {
 849                 if (ca->mi.group) {
 850                         mutex_lock(&c->sb_lock);
 851                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 852                                                ca->mi.group - 1);
 853                         mutex_unlock(&c->sb_lock);
 854                 }
 855
 856                 prt_char(out, '\n');
 857         }
 858
 859         if (attr == &sysfs_has_data) {
 860                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 861                 prt_char(out, '\n');
 862         }
 863
 864         if (attr == &sysfs_state_rw) {
 865                 prt_string_option(out, bch2_member_states, ca->mi.state);
 866                 prt_char(out, '\n');
 867         }
 868
 869         if (attr == &sysfs_iodone)
 870                 dev_iodone_to_text(out, ca);
 871
 872         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 873         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 874
 875         if (attr == &sysfs_io_latency_stats_read)
 876                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 877
 878         if (attr == &sysfs_io_latency_stats_write)
 879                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 880
 881         sysfs_printf(congested,                 "%u%%",
 882                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 883                      * 100 / CONGESTED_MAX);
 884
 885         if (attr == &sysfs_alloc_debug)
 886                 dev_alloc_debug_to_text(out, ca);
 887
 888         return 0;
 889 }
 890
 891 STORE(bch2_dev)
 892 {
 893         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 894         struct bch_fs *c = ca->fs;
 895         struct bch_member *mi;
 896
 897         if (attr == &sysfs_discard) {
 898                 bool v = strtoul_or_return(buf);
 899
 900                 mutex_lock(&c->sb_lock);
 901                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 902
 903                 if (v != BCH_MEMBER_DISCARD(mi)) {
 904                         SET_BCH_MEMBER_DISCARD(mi, v);
 905                         bch2_write_super(c);
 906                 }
 907                 mutex_unlock(&c->sb_lock);
 908         }
 909
 910         if (attr == &sysfs_label) {
 911                 char *tmp;
 912                 int ret;
 913
 914                 tmp = kstrdup(buf, GFP_KERNEL);
 915                 if (!tmp)
 916                         return -ENOMEM;
 917
 918                 ret = bch2_dev_group_set(c, ca, strim(tmp));
 919                 kfree(tmp);
 920                 if (ret)
 921                         return ret;
 922         }
 923
 924         return size;
 925 }
 926 SYSFS_OPS(bch2_dev);
 927
 928 struct attribute *bch2_dev_files[] = {
 929         &sysfs_uuid,
 930         &sysfs_bucket_size,
 931         &sysfs_first_bucket,
 932         &sysfs_nbuckets,
 933         &sysfs_durability,
 934
 935         /* settings: */
 936         &sysfs_discard,
 937         &sysfs_state_rw,
 938         &sysfs_label,
 939
 940         &sysfs_has_data,
 941         &sysfs_iodone,
 942
 943         &sysfs_io_latency_read,
 944         &sysfs_io_latency_write,
 945         &sysfs_io_latency_stats_read,
 946         &sysfs_io_latency_stats_write,
 947         &sysfs_congested,
 948
 949         /* debug: */
 950         &sysfs_alloc_debug,
 951         NULL
 952 };
 953
 954 #endif  /* _BCACHEFS_SYSFS_H_ */