git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * bcache sysfs interfaces
   4  *
   5  * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com>
   6  * Copyright 2012 Google, Inc.
   7  */
   8
   9 #ifndef NO_BCACHEFS_SYSFS
  10
  11 #include "bcachefs.h"
  12 #include "alloc_background.h"
  13 #include "alloc_foreground.h"
  14 #include "sysfs.h"
  15 #include "btree_cache.h"
  16 #include "btree_io.h"
  17 #include "btree_iter.h"
  18 #include "btree_key_cache.h"
  19 #include "btree_update.h"
  20 #include "btree_update_interior.h"
  21 #include "btree_gc.h"
  22 #include "buckets.h"
  23 #include "clock.h"
  24 #include "disk_groups.h"
  25 #include "ec.h"
  26 #include "inode.h"
  27 #include "journal.h"
  28 #include "keylist.h"
  29 #include "move.h"
  30 #include "movinggc.h"
  31 #include "nocow_locking.h"
  32 #include "opts.h"
  33 #include "rebalance.h"
  34 #include "replicas.h"
  35 #include "super-io.h"
  36 #include "tests.h"
  37
  38 #include <linux/blkdev.h>
  39 #include <linux/sort.h>
  40 #include <linux/sched/clock.h>
  41
  42 #include "util.h"
  43
  44 #define SYSFS_OPS(type)                                                 \
  45 const struct sysfs_ops type ## _sysfs_ops = {                           \
  46         .show   = type ## _show,                                        \
  47         .store  = type ## _store                                        \
  48 }
  49
  50 #define SHOW(fn)                                                        \
  51 static ssize_t fn ## _to_text(struct printbuf *,                        \
  52                               struct kobject *, struct attribute *);    \
  53                                                                         \
  54 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
  55                            char *buf)                                   \
  56 {                                                                       \
  57         struct printbuf out = PRINTBUF;                                 \
  58         ssize_t ret = fn ## _to_text(&out, kobj, attr);                 \
  59                                                                         \
  60         if (out.pos && out.buf[out.pos - 1] != '\n')                    \
  61                 prt_newline(&out);                                      \
  62                                                                         \
  63         if (!ret && out.allocation_failure)                             \
  64                 ret = -ENOMEM;                                          \
  65                                                                         \
  66         if (!ret) {                                                     \
  67                 ret = min_t(size_t, out.pos, PAGE_SIZE - 1);            \
  68                 memcpy(buf, out.buf, ret);                              \
  69         }                                                               \
  70         printbuf_exit(&out);                                            \
  71         return bch2_err_class(ret);                                     \
  72 }                                                                       \
  73                                                                         \
  74 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
  75                               struct attribute *attr)
  76
  77 #define STORE(fn)                                                       \
  78 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
  79                             const char *, size_t);                      \
  80                                                                         \
  81 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
  82                             const char *buf, size_t size)               \
  83 {                                                                       \
  84         return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
  85 }                                                                       \
  86                                                                         \
  87 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
  88                                   const char *buf, size_t size)
  89
  90 #define __sysfs_attribute(_name, _mode)                                 \
  91         static struct attribute sysfs_##_name =                         \
  92                 { .name = #_name, .mode = _mode }
  93
  94 #define write_attribute(n)      __sysfs_attribute(n, 0200)
  95 #define read_attribute(n)       __sysfs_attribute(n, 0444)
  96 #define rw_attribute(n)         __sysfs_attribute(n, 0644)
  97
  98 #define sysfs_printf(file, fmt, ...)                                    \
  99 do {                                                                    \
 100         if (attr == &sysfs_ ## file)                                    \
 101                 prt_printf(out, fmt "\n", __VA_ARGS__);                 \
 102 } while (0)
 103
 104 #define sysfs_print(file, var)                                          \
 105 do {                                                                    \
 106         if (attr == &sysfs_ ## file)                                    \
 107                 snprint(out, var);                                      \
 108 } while (0)
 109
 110 #define sysfs_hprint(file, val)                                         \
 111 do {                                                                    \
 112         if (attr == &sysfs_ ## file)                                    \
 113                 prt_human_readable_s64(out, val);                       \
 114 } while (0)
 115
 116 #define var_printf(_var, fmt)   sysfs_printf(_var, fmt, var(_var))
 117 #define var_print(_var)         sysfs_print(_var, var(_var))
 118 #define var_hprint(_var)        sysfs_hprint(_var, var(_var))
 119
 120 #define sysfs_strtoul(file, var)                                        \
 121 do {                                                                    \
 122         if (attr == &sysfs_ ## file)                                    \
 123                 return strtoul_safe(buf, var) ?: (ssize_t) size;        \
 124 } while (0)
 125
 126 #define sysfs_strtoul_clamp(file, var, min, max)                        \
 127 do {                                                                    \
 128         if (attr == &sysfs_ ## file)                                    \
 129                 return strtoul_safe_clamp(buf, var, min, max)           \
 130                         ?: (ssize_t) size;                              \
 131 } while (0)
 132
 133 #define strtoul_or_return(cp)                                           \
 134 ({                                                                      \
 135         unsigned long _v;                                               \
 136         int _r = kstrtoul(cp, 10, &_v);                                 \
 137         if (_r)                                                         \
 138                 return _r;                                              \
 139         _v;                                                             \
 140 })
 141
 142 #define strtoul_restrict_or_return(cp, min, max)                        \
 143 ({                                                                      \
 144         unsigned long __v = 0;                                          \
 145         int _r = strtoul_safe_restrict(cp, __v, min, max);              \
 146         if (_r)                                                         \
 147                 return _r;                                              \
 148         __v;                                                            \
 149 })
 150
 151 #define strtoi_h_or_return(cp)                                          \
 152 ({                                                                      \
 153         u64 _v;                                                         \
 154         int _r = strtoi_h(cp, &_v);                                     \
 155         if (_r)                                                         \
 156                 return _r;                                              \
 157         _v;                                                             \
 158 })
 159
 160 #define sysfs_hatoi(file, var)                                          \
 161 do {                                                                    \
 162         if (attr == &sysfs_ ## file)                                    \
 163                 return strtoi_h(buf, &var) ?: (ssize_t) size;           \
 164 } while (0)
 165
 166 write_attribute(trigger_gc);
 167 write_attribute(trigger_discards);
 168 write_attribute(trigger_invalidates);
 169 write_attribute(prune_cache);
 170 write_attribute(btree_wakeup);
 171 rw_attribute(btree_gc_periodic);
 172 rw_attribute(gc_gens_pos);
 173
 174 read_attribute(uuid);
 175 read_attribute(minor);
 176 read_attribute(bucket_size);
 177 read_attribute(first_bucket);
 178 read_attribute(nbuckets);
 179 rw_attribute(durability);
 180 read_attribute(iodone);
 181
 182 read_attribute(io_latency_read);
 183 read_attribute(io_latency_write);
 184 read_attribute(io_latency_stats_read);
 185 read_attribute(io_latency_stats_write);
 186 read_attribute(congested);
 187
 188 read_attribute(btree_write_stats);
 189
 190 read_attribute(btree_cache_size);
 191 read_attribute(compression_stats);
 192 read_attribute(journal_debug);
 193 read_attribute(btree_updates);
 194 read_attribute(btree_cache);
 195 read_attribute(btree_key_cache);
 196 read_attribute(stripes_heap);
 197 read_attribute(open_buckets);
 198 read_attribute(open_buckets_partial);
 199 read_attribute(write_points);
 200 read_attribute(nocow_lock_table);
 201
 202 #ifdef BCH_WRITE_REF_DEBUG
 203 read_attribute(write_refs);
 204
 205 const char * const bch2_write_refs[] = {
 206 #define x(n)    #n,
 207         BCH_WRITE_REFS()
 208 #undef x
 209         NULL
 210 };
 211
 212 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
 213 {
 214         bch2_printbuf_tabstop_push(out, 24);
 215
 216         for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
 217                 prt_str(out, bch2_write_refs[i]);
 218                 prt_tab(out);
 219                 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
 220                 prt_newline(out);
 221         }
 222 }
 223 #endif
 224
 225 read_attribute(internal_uuid);
 226
 227 read_attribute(has_data);
 228 read_attribute(alloc_debug);
 229
 230 #define x(t, n, ...) read_attribute(t);
 231 BCH_PERSISTENT_COUNTERS()
 232 #undef x
 233
 234 rw_attribute(discard);
 235 rw_attribute(label);
 236
 237 rw_attribute(copy_gc_enabled);
 238 read_attribute(copy_gc_wait);
 239
 240 rw_attribute(rebalance_enabled);
 241 sysfs_pd_controller_attribute(rebalance);
 242 read_attribute(rebalance_work);
 243 rw_attribute(promote_whole_extents);
 244
 245 read_attribute(new_stripes);
 246
 247 read_attribute(io_timers_read);
 248 read_attribute(io_timers_write);
 249
 250 read_attribute(data_jobs);
 251
 252 #ifdef CONFIG_BCACHEFS_TESTS
 253 write_attribute(perf_test);
 254 #endif /* CONFIG_BCACHEFS_TESTS */
 255
 256 #define x(_name)                                                \
 257         static struct attribute sysfs_time_stat_##_name =               \
 258                 { .name = #_name, .mode = 0444 };
 259         BCH_TIME_STATS()
 260 #undef x
 261
 262 static struct attribute sysfs_state_rw = {
 263         .name = "state",
 264         .mode =  0444,
 265 };
 266
 267 static size_t bch2_btree_cache_size(struct bch_fs *c)
 268 {
 269         size_t ret = 0;
 270         struct btree *b;
 271
 272         mutex_lock(&c->btree_cache.lock);
 273         list_for_each_entry(b, &c->btree_cache.live, list)
 274                 ret += btree_bytes(c);
 275
 276         mutex_unlock(&c->btree_cache.lock);
 277         return ret;
 278 }
 279
 280 static long data_progress_to_text(struct printbuf *out, struct bch_fs *c)
 281 {
 282         long ret = 0;
 283         struct bch_move_stats *stats;
 284
 285         mutex_lock(&c->data_progress_lock);
 286         list_for_each_entry(stats, &c->data_progress_list, list) {
 287                 prt_printf(out, "%s: data type %s btree_id %s position: ",
 288                        stats->name,
 289                        bch2_data_types[stats->data_type],
 290                        bch2_btree_ids[stats->btree_id]);
 291                 bch2_bpos_to_text(out, stats->pos);
 292                 prt_printf(out, "%s", "\n");
 293         }
 294
 295         mutex_unlock(&c->data_progress_lock);
 296         return ret;
 297 }
 298
 299 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 300 {
 301         struct btree_trans trans;
 302         struct btree_iter iter;
 303         struct bkey_s_c k;
 304         enum btree_id id;
 305         u64 nr_uncompressed_extents = 0,
 306             nr_compressed_extents = 0,
 307             nr_incompressible_extents = 0,
 308             uncompressed_sectors = 0,
 309             incompressible_sectors = 0,
 310             compressed_sectors_compressed = 0,
 311             compressed_sectors_uncompressed = 0;
 312         int ret;
 313
 314         if (!test_bit(BCH_FS_STARTED, &c->flags))
 315                 return -EPERM;
 316
 317         bch2_trans_init(&trans, c, 0, 0);
 318
 319         for (id = 0; id < BTREE_ID_NR; id++) {
 320                 if (!btree_type_has_ptrs(id))
 321                         continue;
 322
 323                 for_each_btree_key(&trans, iter, id, POS_MIN,
 324                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 325                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 326                         const union bch_extent_entry *entry;
 327                         struct extent_ptr_decoded p;
 328                         bool compressed = false, uncompressed = false, incompressible = false;
 329
 330                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 331                                 switch (p.crc.compression_type) {
 332                                 case BCH_COMPRESSION_TYPE_none:
 333                                         uncompressed = true;
 334                                         uncompressed_sectors += k.k->size;
 335                                         break;
 336                                 case BCH_COMPRESSION_TYPE_incompressible:
 337                                         incompressible = true;
 338                                         incompressible_sectors += k.k->size;
 339                                         break;
 340                                 default:
 341                                         compressed_sectors_compressed +=
 342                                                 p.crc.compressed_size;
 343                                         compressed_sectors_uncompressed +=
 344                                                 p.crc.uncompressed_size;
 345                                         compressed = true;
 346                                         break;
 347                                 }
 348                         }
 349
 350                         if (incompressible)
 351                                 nr_incompressible_extents++;
 352                         else if (uncompressed)
 353                                 nr_uncompressed_extents++;
 354                         else if (compressed)
 355                                 nr_compressed_extents++;
 356                 }
 357                 bch2_trans_iter_exit(&trans, &iter);
 358         }
 359
 360         bch2_trans_exit(&trans);
 361
 362         if (ret)
 363                 return ret;
 364
 365         prt_printf(out, "uncompressed:\n");
 366         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 367         prt_printf(out, "       size:                   ");
 368         prt_human_readable_u64(out, uncompressed_sectors << 9);
 369         prt_printf(out, "\n");
 370
 371         prt_printf(out, "compressed:\n");
 372         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 373         prt_printf(out, "       compressed size:        ");
 374         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 375         prt_printf(out, "\n");
 376         prt_printf(out, "       uncompressed size:      ");
 377         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 378         prt_printf(out, "\n");
 379
 380         prt_printf(out, "incompressible:\n");
 381         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 382         prt_printf(out, "       size:                   ");
 383         prt_human_readable_u64(out, incompressible_sectors << 9);
 384         prt_printf(out, "\n");
 385         return 0;
 386 }
 387
 388 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 389 {
 390         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 391         bch2_bpos_to_text(out, c->gc_gens_pos);
 392         prt_printf(out, "\n");
 393 }
 394
 395 static void bch2_btree_wakeup_all(struct bch_fs *c)
 396 {
 397         struct btree_trans *trans;
 398
 399         mutex_lock(&c->btree_trans_lock);
 400         list_for_each_entry(trans, &c->btree_trans_list, list) {
 401                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 402
 403                 if (b)
 404                         six_lock_wakeup_all(&b->lock);
 405
 406         }
 407         mutex_unlock(&c->btree_trans_lock);
 408 }
 409
 410 SHOW(bch2_fs)
 411 {
 412         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 413
 414         sysfs_print(minor,                      c->minor);
 415         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 416
 417         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 418
 419         if (attr == &sysfs_btree_write_stats)
 420                 bch2_btree_write_stats_to_text(out, c);
 421
 422         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 423
 424         if (attr == &sysfs_gc_gens_pos)
 425                 bch2_gc_gens_pos_to_text(out, c);
 426
 427         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 428
 429         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 430         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 431
 432         if (attr == &sysfs_copy_gc_wait)
 433                 bch2_copygc_wait_to_text(out, c);
 434
 435         if (attr == &sysfs_rebalance_work)
 436                 bch2_rebalance_work_to_text(out, c);
 437
 438         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 439
 440         /* Debugging: */
 441
 442         if (attr == &sysfs_journal_debug)
 443                 bch2_journal_debug_to_text(out, &c->journal);
 444
 445         if (attr == &sysfs_btree_updates)
 446                 bch2_btree_updates_to_text(out, c);
 447
 448         if (attr == &sysfs_btree_cache)
 449                 bch2_btree_cache_to_text(out, &c->btree_cache);
 450
 451         if (attr == &sysfs_btree_key_cache)
 452                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 453
 454         if (attr == &sysfs_stripes_heap)
 455                 bch2_stripes_heap_to_text(out, c);
 456
 457         if (attr == &sysfs_open_buckets)
 458                 bch2_open_buckets_to_text(out, c);
 459
 460         if (attr == &sysfs_open_buckets_partial)
 461                 bch2_open_buckets_partial_to_text(out, c);
 462
 463         if (attr == &sysfs_write_points)
 464                 bch2_write_points_to_text(out, c);
 465
 466         if (attr == &sysfs_compression_stats)
 467                 bch2_compression_stats_to_text(out, c);
 468
 469         if (attr == &sysfs_new_stripes)
 470                 bch2_new_stripes_to_text(out, c);
 471
 472         if (attr == &sysfs_io_timers_read)
 473                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 474
 475         if (attr == &sysfs_io_timers_write)
 476                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 477
 478         if (attr == &sysfs_data_jobs)
 479                 data_progress_to_text(out, c);
 480
 481 #ifdef BCH_WRITE_REF_DEBUG
 482         if (attr == &sysfs_write_refs)
 483                 bch2_write_refs_to_text(out, c);
 484 #endif
 485
 486         if (attr == &sysfs_nocow_lock_table)
 487                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 488
 489         return 0;
 490 }
 491
 492 STORE(bch2_fs)
 493 {
 494         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 495
 496         if (attr == &sysfs_btree_gc_periodic) {
 497                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 498                         ?: (ssize_t) size;
 499
 500                 wake_up_process(c->gc_thread);
 501                 return ret;
 502         }
 503
 504         if (attr == &sysfs_copy_gc_enabled) {
 505                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 506                         ?: (ssize_t) size;
 507
 508                 if (c->copygc_thread)
 509                         wake_up_process(c->copygc_thread);
 510                 return ret;
 511         }
 512
 513         if (attr == &sysfs_rebalance_enabled) {
 514                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 515                         ?: (ssize_t) size;
 516
 517                 rebalance_wakeup(c);
 518                 return ret;
 519         }
 520
 521         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 522
 523         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 524
 525         /* Debugging: */
 526
 527         if (!test_bit(BCH_FS_STARTED, &c->flags))
 528                 return -EPERM;
 529
 530         /* Debugging: */
 531
 532         if (!test_bit(BCH_FS_RW, &c->flags))
 533                 return -EROFS;
 534
 535         if (attr == &sysfs_prune_cache) {
 536                 struct shrink_control sc;
 537
 538                 sc.gfp_mask = GFP_KERNEL;
 539                 sc.nr_to_scan = strtoul_or_return(buf);
 540                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 541         }
 542
 543         if (attr == &sysfs_btree_wakeup)
 544                 bch2_btree_wakeup_all(c);
 545
 546         if (attr == &sysfs_trigger_gc) {
 547                 /*
 548                  * Full gc is currently incompatible with btree key cache:
 549                  */
 550 #if 0
 551                 down_read(&c->state_lock);
 552                 bch2_gc(c, false, false);
 553                 up_read(&c->state_lock);
 554 #else
 555                 bch2_gc_gens(c);
 556 #endif
 557         }
 558
 559         if (attr == &sysfs_trigger_discards)
 560                 bch2_do_discards(c);
 561
 562         if (attr == &sysfs_trigger_invalidates)
 563                 bch2_do_invalidates(c);
 564
 565 #ifdef CONFIG_BCACHEFS_TESTS
 566         if (attr == &sysfs_perf_test) {
 567                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 568                 char *test              = strsep(&p, " \t\n");
 569                 char *nr_str            = strsep(&p, " \t\n");
 570                 char *threads_str       = strsep(&p, " \t\n");
 571                 unsigned threads;
 572                 u64 nr;
 573                 int ret = -EINVAL;
 574
 575                 if (threads_str &&
 576                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 577                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 578                         ret = bch2_btree_perf_test(c, test, nr, threads);
 579                 kfree(tmp);
 580
 581                 if (ret)
 582                         size = ret;
 583         }
 584 #endif
 585         return size;
 586 }
 587 SYSFS_OPS(bch2_fs);
 588
 589 struct attribute *bch2_fs_files[] = {
 590         &sysfs_minor,
 591         &sysfs_btree_cache_size,
 592         &sysfs_btree_write_stats,
 593
 594         &sysfs_promote_whole_extents,
 595
 596         &sysfs_compression_stats,
 597
 598 #ifdef CONFIG_BCACHEFS_TESTS
 599         &sysfs_perf_test,
 600 #endif
 601         NULL
 602 };
 603
 604 /* counters dir */
 605
 606 SHOW(bch2_fs_counters)
 607 {
 608         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 609         u64 counter = 0;
 610         u64 counter_since_mount = 0;
 611
 612         printbuf_tabstop_push(out, 32);
 613
 614         #define x(t, ...) \
 615                 if (attr == &sysfs_##t) {                                       \
 616                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 617                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 618                         prt_printf(out, "since mount:");                                \
 619                         prt_tab(out);                                           \
 620                         prt_human_readable_u64(out, counter_since_mount << 9);  \
 621                         prt_newline(out);                                       \
 622                                                                                 \
 623                         prt_printf(out, "since filesystem creation:");          \
 624                         prt_tab(out);                                           \
 625                         prt_human_readable_u64(out, counter << 9);              \
 626                         prt_newline(out);                                       \
 627                 }
 628         BCH_PERSISTENT_COUNTERS()
 629         #undef x
 630         return 0;
 631 }
 632
 633 STORE(bch2_fs_counters) {
 634         return 0;
 635 }
 636
 637 SYSFS_OPS(bch2_fs_counters);
 638
 639 struct attribute *bch2_fs_counters_files[] = {
 640 #define x(t, ...) \
 641         &sysfs_##t,
 642         BCH_PERSISTENT_COUNTERS()
 643 #undef x
 644         NULL
 645 };
 646 /* internal dir - just a wrapper */
 647
 648 SHOW(bch2_fs_internal)
 649 {
 650         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 651
 652         return bch2_fs_to_text(out, &c->kobj, attr);
 653 }
 654
 655 STORE(bch2_fs_internal)
 656 {
 657         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 658
 659         return bch2_fs_store(&c->kobj, attr, buf, size);
 660 }
 661 SYSFS_OPS(bch2_fs_internal);
 662
 663 struct attribute *bch2_fs_internal_files[] = {
 664         &sysfs_journal_debug,
 665         &sysfs_btree_updates,
 666         &sysfs_btree_cache,
 667         &sysfs_btree_key_cache,
 668         &sysfs_new_stripes,
 669         &sysfs_stripes_heap,
 670         &sysfs_open_buckets,
 671         &sysfs_open_buckets_partial,
 672         &sysfs_write_points,
 673 #ifdef BCH_WRITE_REF_DEBUG
 674         &sysfs_write_refs,
 675 #endif
 676         &sysfs_nocow_lock_table,
 677         &sysfs_io_timers_read,
 678         &sysfs_io_timers_write,
 679
 680         &sysfs_trigger_gc,
 681         &sysfs_trigger_discards,
 682         &sysfs_trigger_invalidates,
 683         &sysfs_prune_cache,
 684         &sysfs_btree_wakeup,
 685
 686         &sysfs_gc_gens_pos,
 687
 688         &sysfs_copy_gc_enabled,
 689         &sysfs_copy_gc_wait,
 690
 691         &sysfs_rebalance_enabled,
 692         &sysfs_rebalance_work,
 693         sysfs_pd_controller_files(rebalance),
 694
 695         &sysfs_data_jobs,
 696
 697         &sysfs_internal_uuid,
 698         NULL
 699 };
 700
 701 /* options */
 702
 703 SHOW(bch2_fs_opts_dir)
 704 {
 705         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 706         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 707         int id = opt - bch2_opt_table;
 708         u64 v = bch2_opt_get_by_id(&c->opts, id);
 709
 710         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 711         prt_char(out, '\n');
 712
 713         return 0;
 714 }
 715
 716 STORE(bch2_fs_opts_dir)
 717 {
 718         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 719         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 720         int ret, id = opt - bch2_opt_table;
 721         char *tmp;
 722         u64 v;
 723
 724         /*
 725          * We don't need to take c->writes for correctness, but it eliminates an
 726          * unsightly error message in the dmesg log when we're RO:
 727          */
 728         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 729                 return -EROFS;
 730
 731         tmp = kstrdup(buf, GFP_KERNEL);
 732         if (!tmp) {
 733                 ret = -ENOMEM;
 734                 goto err;
 735         }
 736
 737         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 738         kfree(tmp);
 739
 740         if (ret < 0)
 741                 goto err;
 742
 743         ret = bch2_opt_check_may_set(c, id, v);
 744         if (ret < 0)
 745                 goto err;
 746
 747         bch2_opt_set_sb(c, opt, v);
 748         bch2_opt_set_by_id(&c->opts, id, v);
 749
 750         if ((id == Opt_background_target ||
 751              id == Opt_background_compression) && v) {
 752                 bch2_rebalance_add_work(c, S64_MAX);
 753                 rebalance_wakeup(c);
 754         }
 755
 756         ret = size;
 757 err:
 758         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 759         return ret;
 760 }
 761 SYSFS_OPS(bch2_fs_opts_dir);
 762
 763 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 764
 765 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 766 {
 767         const struct bch_option *i;
 768         int ret;
 769
 770         for (i = bch2_opt_table;
 771              i < bch2_opt_table + bch2_opts_nr;
 772              i++) {
 773                 if (!(i->flags & OPT_FS))
 774                         continue;
 775
 776                 ret = sysfs_create_file(kobj, &i->attr);
 777                 if (ret)
 778                         return ret;
 779         }
 780
 781         return 0;
 782 }
 783
 784 /* time stats */
 785
 786 SHOW(bch2_fs_time_stats)
 787 {
 788         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 789
 790 #define x(name)                                                         \
 791         if (attr == &sysfs_time_stat_##name)                            \
 792                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 793         BCH_TIME_STATS()
 794 #undef x
 795
 796         return 0;
 797 }
 798
 799 STORE(bch2_fs_time_stats)
 800 {
 801         return size;
 802 }
 803 SYSFS_OPS(bch2_fs_time_stats);
 804
 805 struct attribute *bch2_fs_time_stats_files[] = {
 806 #define x(name)                                         \
 807         &sysfs_time_stat_##name,
 808         BCH_TIME_STATS()
 809 #undef x
 810         NULL
 811 };
 812
 813 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 814 {
 815         struct bch_fs *c = ca->fs;
 816         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 817         unsigned i, nr[BCH_DATA_NR];
 818
 819         memset(nr, 0, sizeof(nr));
 820
 821         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 822                 nr[c->open_buckets[i].data_type]++;
 823
 824         printbuf_tabstop_push(out, 8);
 825         printbuf_tabstop_push(out, 16);
 826         printbuf_tabstop_push(out, 16);
 827         printbuf_tabstop_push(out, 16);
 828         printbuf_tabstop_push(out, 16);
 829
 830         prt_tab(out);
 831         prt_str(out, "buckets");
 832         prt_tab_rjust(out);
 833         prt_str(out, "sectors");
 834         prt_tab_rjust(out);
 835         prt_str(out, "fragmented");
 836         prt_tab_rjust(out);
 837         prt_newline(out);
 838
 839         for (i = 0; i < BCH_DATA_NR; i++) {
 840                 prt_str(out, bch2_data_types[i]);
 841                 prt_tab(out);
 842                 prt_u64(out, stats.d[i].buckets);
 843                 prt_tab_rjust(out);
 844                 prt_u64(out, stats.d[i].sectors);
 845                 prt_tab_rjust(out);
 846                 prt_u64(out, stats.d[i].fragmented);
 847                 prt_tab_rjust(out);
 848                 prt_newline(out);
 849         }
 850
 851         prt_str(out, "ec");
 852         prt_tab(out);
 853         prt_u64(out, stats.buckets_ec);
 854         prt_tab_rjust(out);
 855         prt_newline(out);
 856
 857         prt_newline(out);
 858
 859         prt_printf(out, "reserves:");
 860         prt_newline(out);
 861         for (i = 0; i < RESERVE_NR; i++) {
 862                 prt_str(out, bch2_alloc_reserves[i]);
 863                 prt_tab(out);
 864                 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
 865                 prt_tab_rjust(out);
 866                 prt_newline(out);
 867         }
 868
 869         prt_newline(out);
 870
 871         printbuf_tabstops_reset(out);
 872         printbuf_tabstop_push(out, 24);
 873
 874         prt_str(out, "freelist_wait");
 875         prt_tab(out);
 876         prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
 877         prt_newline(out);
 878
 879         prt_str(out, "open buckets allocated");
 880         prt_tab(out);
 881         prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
 882         prt_newline(out);
 883
 884         prt_str(out, "open buckets this dev");
 885         prt_tab(out);
 886         prt_u64(out, ca->nr_open_buckets);
 887         prt_newline(out);
 888
 889         prt_str(out, "open buckets total");
 890         prt_tab(out);
 891         prt_u64(out, OPEN_BUCKETS_COUNT);
 892         prt_newline(out);
 893
 894         prt_str(out, "open_buckets_wait");
 895         prt_tab(out);
 896         prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
 897         prt_newline(out);
 898
 899         prt_str(out, "open_buckets_btree");
 900         prt_tab(out);
 901         prt_u64(out, nr[BCH_DATA_btree]);
 902         prt_newline(out);
 903
 904         prt_str(out, "open_buckets_user");
 905         prt_tab(out);
 906         prt_u64(out, nr[BCH_DATA_user]);
 907         prt_newline(out);
 908
 909         prt_str(out, "buckets_to_invalidate");
 910         prt_tab(out);
 911         prt_u64(out, should_invalidate_buckets(ca, stats));
 912         prt_newline(out);
 913
 914         prt_str(out, "btree reserve cache");
 915         prt_tab(out);
 916         prt_u64(out, c->btree_reserve_cache_nr);
 917         prt_newline(out);
 918 }
 919
 920 static const char * const bch2_rw[] = {
 921         "read",
 922         "write",
 923         NULL
 924 };
 925
 926 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 927 {
 928         int rw, i;
 929
 930         for (rw = 0; rw < 2; rw++) {
 931                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 932
 933                 for (i = 1; i < BCH_DATA_NR; i++)
 934                         prt_printf(out, "%-12s:%12llu\n",
 935                                bch2_data_types[i],
 936                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 937         }
 938 }
 939
 940 SHOW(bch2_dev)
 941 {
 942         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 943         struct bch_fs *c = ca->fs;
 944
 945         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 946
 947         sysfs_print(bucket_size,        bucket_bytes(ca));
 948         sysfs_print(first_bucket,       ca->mi.first_bucket);
 949         sysfs_print(nbuckets,           ca->mi.nbuckets);
 950         sysfs_print(durability,         ca->mi.durability);
 951         sysfs_print(discard,            ca->mi.discard);
 952
 953         if (attr == &sysfs_label) {
 954                 if (ca->mi.group) {
 955                         mutex_lock(&c->sb_lock);
 956                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 957                                                ca->mi.group - 1);
 958                         mutex_unlock(&c->sb_lock);
 959                 }
 960
 961                 prt_char(out, '\n');
 962         }
 963
 964         if (attr == &sysfs_has_data) {
 965                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 966                 prt_char(out, '\n');
 967         }
 968
 969         if (attr == &sysfs_state_rw) {
 970                 prt_string_option(out, bch2_member_states, ca->mi.state);
 971                 prt_char(out, '\n');
 972         }
 973
 974         if (attr == &sysfs_iodone)
 975                 dev_iodone_to_text(out, ca);
 976
 977         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 978         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 979
 980         if (attr == &sysfs_io_latency_stats_read)
 981                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 982
 983         if (attr == &sysfs_io_latency_stats_write)
 984                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 985
 986         sysfs_printf(congested,                 "%u%%",
 987                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 988                      * 100 / CONGESTED_MAX);
 989
 990         if (attr == &sysfs_alloc_debug)
 991                 dev_alloc_debug_to_text(out, ca);
 992
 993         return 0;
 994 }
 995
 996 STORE(bch2_dev)
 997 {
 998         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 999         struct bch_fs *c = ca->fs;
1000         struct bch_member *mi;
1001
1002         if (attr == &sysfs_discard) {
1003                 bool v = strtoul_or_return(buf);
1004
1005                 mutex_lock(&c->sb_lock);
1006                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
1007
1008                 if (v != BCH_MEMBER_DISCARD(mi)) {
1009                         SET_BCH_MEMBER_DISCARD(mi, v);
1010                         bch2_write_super(c);
1011                 }
1012                 mutex_unlock(&c->sb_lock);
1013         }
1014
1015         if (attr == &sysfs_durability) {
1016                 u64 v = strtoul_or_return(buf);
1017
1018                 mutex_lock(&c->sb_lock);
1019                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
1020
1021                 if (v != BCH_MEMBER_DURABILITY(mi)) {
1022                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
1023                         bch2_write_super(c);
1024                 }
1025                 mutex_unlock(&c->sb_lock);
1026         }
1027
1028         if (attr == &sysfs_label) {
1029                 char *tmp;
1030                 int ret;
1031
1032                 tmp = kstrdup(buf, GFP_KERNEL);
1033                 if (!tmp)
1034                         return -ENOMEM;
1035
1036                 ret = bch2_dev_group_set(c, ca, strim(tmp));
1037                 kfree(tmp);
1038                 if (ret)
1039                         return ret;
1040         }
1041
1042         return size;
1043 }
1044 SYSFS_OPS(bch2_dev);
1045
1046 struct attribute *bch2_dev_files[] = {
1047         &sysfs_uuid,
1048         &sysfs_bucket_size,
1049         &sysfs_first_bucket,
1050         &sysfs_nbuckets,
1051         &sysfs_durability,
1052
1053         /* settings: */
1054         &sysfs_discard,
1055         &sysfs_state_rw,
1056         &sysfs_label,
1057
1058         &sysfs_has_data,
1059         &sysfs_iodone,
1060
1061         &sysfs_io_latency_read,
1062         &sysfs_io_latency_write,
1063         &sysfs_io_latency_stats_read,
1064         &sysfs_io_latency_stats_write,
1065         &sysfs_congested,
1066
1067         /* debug: */
1068         &sysfs_alloc_debug,
1069         NULL
1070 };
1071
1072 #endif  /* _BCACHEFS_SYSFS_H_ */