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 static 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 read_attribute(disk_groups);
 227
 228 read_attribute(has_data);
 229 read_attribute(alloc_debug);
 230
 231 #define x(t, n, ...) read_attribute(t);
 232 BCH_PERSISTENT_COUNTERS()
 233 #undef x
 234
 235 rw_attribute(discard);
 236 rw_attribute(label);
 237
 238 rw_attribute(copy_gc_enabled);
 239 read_attribute(copy_gc_wait);
 240
 241 rw_attribute(rebalance_enabled);
 242 sysfs_pd_controller_attribute(rebalance);
 243 read_attribute(rebalance_work);
 244 rw_attribute(promote_whole_extents);
 245
 246 read_attribute(new_stripes);
 247
 248 read_attribute(io_timers_read);
 249 read_attribute(io_timers_write);
 250
 251 read_attribute(data_jobs);
 252 read_attribute(moving_ctxts);
 253
 254 #ifdef CONFIG_BCACHEFS_TESTS
 255 write_attribute(perf_test);
 256 #endif /* CONFIG_BCACHEFS_TESTS */
 257
 258 #define x(_name)                                                \
 259         static struct attribute sysfs_time_stat_##_name =               \
 260                 { .name = #_name, .mode = 0444 };
 261         BCH_TIME_STATS()
 262 #undef x
 263
 264 static struct attribute sysfs_state_rw = {
 265         .name = "state",
 266         .mode =  0444,
 267 };
 268
 269 static size_t bch2_btree_cache_size(struct bch_fs *c)
 270 {
 271         size_t ret = 0;
 272         struct btree *b;
 273
 274         mutex_lock(&c->btree_cache.lock);
 275         list_for_each_entry(b, &c->btree_cache.live, list)
 276                 ret += btree_bytes(c);
 277
 278         mutex_unlock(&c->btree_cache.lock);
 279         return ret;
 280 }
 281
 282 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
 283 {
 284         struct btree_trans trans;
 285         struct btree_iter iter;
 286         struct bkey_s_c k;
 287         enum btree_id id;
 288         u64 nr_uncompressed_extents = 0,
 289             nr_compressed_extents = 0,
 290             nr_incompressible_extents = 0,
 291             uncompressed_sectors = 0,
 292             incompressible_sectors = 0,
 293             compressed_sectors_compressed = 0,
 294             compressed_sectors_uncompressed = 0;
 295         int ret;
 296
 297         if (!test_bit(BCH_FS_STARTED, &c->flags))
 298                 return -EPERM;
 299
 300         bch2_trans_init(&trans, c, 0, 0);
 301
 302         for (id = 0; id < BTREE_ID_NR; id++) {
 303                 if (!btree_type_has_ptrs(id))
 304                         continue;
 305
 306                 for_each_btree_key(&trans, iter, id, POS_MIN,
 307                                    BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
 308                         struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
 309                         const union bch_extent_entry *entry;
 310                         struct extent_ptr_decoded p;
 311                         bool compressed = false, uncompressed = false, incompressible = false;
 312
 313                         bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
 314                                 switch (p.crc.compression_type) {
 315                                 case BCH_COMPRESSION_TYPE_none:
 316                                         uncompressed = true;
 317                                         uncompressed_sectors += k.k->size;
 318                                         break;
 319                                 case BCH_COMPRESSION_TYPE_incompressible:
 320                                         incompressible = true;
 321                                         incompressible_sectors += k.k->size;
 322                                         break;
 323                                 default:
 324                                         compressed_sectors_compressed +=
 325                                                 p.crc.compressed_size;
 326                                         compressed_sectors_uncompressed +=
 327                                                 p.crc.uncompressed_size;
 328                                         compressed = true;
 329                                         break;
 330                                 }
 331                         }
 332
 333                         if (incompressible)
 334                                 nr_incompressible_extents++;
 335                         else if (uncompressed)
 336                                 nr_uncompressed_extents++;
 337                         else if (compressed)
 338                                 nr_compressed_extents++;
 339                 }
 340                 bch2_trans_iter_exit(&trans, &iter);
 341         }
 342
 343         bch2_trans_exit(&trans);
 344
 345         if (ret)
 346                 return ret;
 347
 348         prt_printf(out, "uncompressed:\n");
 349         prt_printf(out, "       nr extents:             %llu\n", nr_uncompressed_extents);
 350         prt_printf(out, "       size:                   ");
 351         prt_human_readable_u64(out, uncompressed_sectors << 9);
 352         prt_printf(out, "\n");
 353
 354         prt_printf(out, "compressed:\n");
 355         prt_printf(out, "       nr extents:             %llu\n", nr_compressed_extents);
 356         prt_printf(out, "       compressed size:        ");
 357         prt_human_readable_u64(out, compressed_sectors_compressed << 9);
 358         prt_printf(out, "\n");
 359         prt_printf(out, "       uncompressed size:      ");
 360         prt_human_readable_u64(out, compressed_sectors_uncompressed << 9);
 361         prt_printf(out, "\n");
 362
 363         prt_printf(out, "incompressible:\n");
 364         prt_printf(out, "       nr extents:             %llu\n", nr_incompressible_extents);
 365         prt_printf(out, "       size:                   ");
 366         prt_human_readable_u64(out, incompressible_sectors << 9);
 367         prt_printf(out, "\n");
 368         return 0;
 369 }
 370
 371 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
 372 {
 373         prt_printf(out, "%s: ", bch2_btree_ids[c->gc_gens_btree]);
 374         bch2_bpos_to_text(out, c->gc_gens_pos);
 375         prt_printf(out, "\n");
 376 }
 377
 378 static void bch2_btree_wakeup_all(struct bch_fs *c)
 379 {
 380         struct btree_trans *trans;
 381
 382         seqmutex_lock(&c->btree_trans_lock);
 383         list_for_each_entry(trans, &c->btree_trans_list, list) {
 384                 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
 385
 386                 if (b)
 387                         six_lock_wakeup_all(&b->lock);
 388
 389         }
 390         seqmutex_unlock(&c->btree_trans_lock);
 391 }
 392
 393 SHOW(bch2_fs)
 394 {
 395         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 396
 397         sysfs_print(minor,                      c->minor);
 398         sysfs_printf(internal_uuid, "%pU",      c->sb.uuid.b);
 399
 400         sysfs_hprint(btree_cache_size,          bch2_btree_cache_size(c));
 401
 402         if (attr == &sysfs_btree_write_stats)
 403                 bch2_btree_write_stats_to_text(out, c);
 404
 405         sysfs_printf(btree_gc_periodic, "%u",   (int) c->btree_gc_periodic);
 406
 407         if (attr == &sysfs_gc_gens_pos)
 408                 bch2_gc_gens_pos_to_text(out, c);
 409
 410         sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
 411
 412         sysfs_printf(rebalance_enabled,         "%i", c->rebalance.enabled);
 413         sysfs_pd_controller_show(rebalance,     &c->rebalance.pd); /* XXX */
 414
 415         if (attr == &sysfs_copy_gc_wait)
 416                 bch2_copygc_wait_to_text(out, c);
 417
 418         if (attr == &sysfs_rebalance_work)
 419                 bch2_rebalance_work_to_text(out, c);
 420
 421         sysfs_print(promote_whole_extents,      c->promote_whole_extents);
 422
 423         /* Debugging: */
 424
 425         if (attr == &sysfs_journal_debug)
 426                 bch2_journal_debug_to_text(out, &c->journal);
 427
 428         if (attr == &sysfs_btree_updates)
 429                 bch2_btree_updates_to_text(out, c);
 430
 431         if (attr == &sysfs_btree_cache)
 432                 bch2_btree_cache_to_text(out, &c->btree_cache);
 433
 434         if (attr == &sysfs_btree_key_cache)
 435                 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
 436
 437         if (attr == &sysfs_stripes_heap)
 438                 bch2_stripes_heap_to_text(out, c);
 439
 440         if (attr == &sysfs_open_buckets)
 441                 bch2_open_buckets_to_text(out, c);
 442
 443         if (attr == &sysfs_open_buckets_partial)
 444                 bch2_open_buckets_partial_to_text(out, c);
 445
 446         if (attr == &sysfs_write_points)
 447                 bch2_write_points_to_text(out, c);
 448
 449         if (attr == &sysfs_compression_stats)
 450                 bch2_compression_stats_to_text(out, c);
 451
 452         if (attr == &sysfs_new_stripes)
 453                 bch2_new_stripes_to_text(out, c);
 454
 455         if (attr == &sysfs_io_timers_read)
 456                 bch2_io_timers_to_text(out, &c->io_clock[READ]);
 457
 458         if (attr == &sysfs_io_timers_write)
 459                 bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
 460
 461         if (attr == &sysfs_data_jobs)
 462                 bch2_data_jobs_to_text(out, c);
 463
 464         if (attr == &sysfs_moving_ctxts)
 465                 bch2_fs_moving_ctxts_to_text(out, c);
 466
 467 #ifdef BCH_WRITE_REF_DEBUG
 468         if (attr == &sysfs_write_refs)
 469                 bch2_write_refs_to_text(out, c);
 470 #endif
 471
 472         if (attr == &sysfs_nocow_lock_table)
 473                 bch2_nocow_locks_to_text(out, &c->nocow_locks);
 474
 475         if (attr == &sysfs_disk_groups)
 476                 bch2_disk_groups_to_text(out, c);
 477
 478         return 0;
 479 }
 480
 481 STORE(bch2_fs)
 482 {
 483         struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
 484
 485         if (attr == &sysfs_btree_gc_periodic) {
 486                 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
 487                         ?: (ssize_t) size;
 488
 489                 wake_up_process(c->gc_thread);
 490                 return ret;
 491         }
 492
 493         if (attr == &sysfs_copy_gc_enabled) {
 494                 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
 495                         ?: (ssize_t) size;
 496
 497                 if (c->copygc_thread)
 498                         wake_up_process(c->copygc_thread);
 499                 return ret;
 500         }
 501
 502         if (attr == &sysfs_rebalance_enabled) {
 503                 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
 504                         ?: (ssize_t) size;
 505
 506                 rebalance_wakeup(c);
 507                 return ret;
 508         }
 509
 510         sysfs_pd_controller_store(rebalance,    &c->rebalance.pd);
 511
 512         sysfs_strtoul(promote_whole_extents,    c->promote_whole_extents);
 513
 514         /* Debugging: */
 515
 516         if (!test_bit(BCH_FS_STARTED, &c->flags))
 517                 return -EPERM;
 518
 519         /* Debugging: */
 520
 521         if (!test_bit(BCH_FS_RW, &c->flags))
 522                 return -EROFS;
 523
 524         if (attr == &sysfs_prune_cache) {
 525                 struct shrink_control sc;
 526
 527                 sc.gfp_mask = GFP_KERNEL;
 528                 sc.nr_to_scan = strtoul_or_return(buf);
 529                 c->btree_cache.shrink.scan_objects(&c->btree_cache.shrink, &sc);
 530         }
 531
 532         if (attr == &sysfs_btree_wakeup)
 533                 bch2_btree_wakeup_all(c);
 534
 535         if (attr == &sysfs_trigger_gc) {
 536                 /*
 537                  * Full gc is currently incompatible with btree key cache:
 538                  */
 539 #if 0
 540                 down_read(&c->state_lock);
 541                 bch2_gc(c, false, false);
 542                 up_read(&c->state_lock);
 543 #else
 544                 bch2_gc_gens(c);
 545 #endif
 546         }
 547
 548         if (attr == &sysfs_trigger_discards)
 549                 bch2_do_discards(c);
 550
 551         if (attr == &sysfs_trigger_invalidates)
 552                 bch2_do_invalidates(c);
 553
 554 #ifdef CONFIG_BCACHEFS_TESTS
 555         if (attr == &sysfs_perf_test) {
 556                 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
 557                 char *test              = strsep(&p, " \t\n");
 558                 char *nr_str            = strsep(&p, " \t\n");
 559                 char *threads_str       = strsep(&p, " \t\n");
 560                 unsigned threads;
 561                 u64 nr;
 562                 int ret = -EINVAL;
 563
 564                 if (threads_str &&
 565                     !(ret = kstrtouint(threads_str, 10, &threads)) &&
 566                     !(ret = bch2_strtoull_h(nr_str, &nr)))
 567                         ret = bch2_btree_perf_test(c, test, nr, threads);
 568                 kfree(tmp);
 569
 570                 if (ret)
 571                         size = ret;
 572         }
 573 #endif
 574         return size;
 575 }
 576 SYSFS_OPS(bch2_fs);
 577
 578 struct attribute *bch2_fs_files[] = {
 579         &sysfs_minor,
 580         &sysfs_btree_cache_size,
 581         &sysfs_btree_write_stats,
 582
 583         &sysfs_promote_whole_extents,
 584
 585         &sysfs_compression_stats,
 586
 587 #ifdef CONFIG_BCACHEFS_TESTS
 588         &sysfs_perf_test,
 589 #endif
 590         NULL
 591 };
 592
 593 /* counters dir */
 594
 595 SHOW(bch2_fs_counters)
 596 {
 597         struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
 598         u64 counter = 0;
 599         u64 counter_since_mount = 0;
 600
 601         printbuf_tabstop_push(out, 32);
 602
 603         #define x(t, ...) \
 604                 if (attr == &sysfs_##t) {                                       \
 605                         counter             = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
 606                         counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
 607                         prt_printf(out, "since mount:");                                \
 608                         prt_tab(out);                                           \
 609                         prt_human_readable_u64(out, counter_since_mount);       \
 610                         prt_newline(out);                                       \
 611                                                                                 \
 612                         prt_printf(out, "since filesystem creation:");          \
 613                         prt_tab(out);                                           \
 614                         prt_human_readable_u64(out, counter);                   \
 615                         prt_newline(out);                                       \
 616                 }
 617         BCH_PERSISTENT_COUNTERS()
 618         #undef x
 619         return 0;
 620 }
 621
 622 STORE(bch2_fs_counters) {
 623         return 0;
 624 }
 625
 626 SYSFS_OPS(bch2_fs_counters);
 627
 628 struct attribute *bch2_fs_counters_files[] = {
 629 #define x(t, ...) \
 630         &sysfs_##t,
 631         BCH_PERSISTENT_COUNTERS()
 632 #undef x
 633         NULL
 634 };
 635 /* internal dir - just a wrapper */
 636
 637 SHOW(bch2_fs_internal)
 638 {
 639         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 640
 641         return bch2_fs_to_text(out, &c->kobj, attr);
 642 }
 643
 644 STORE(bch2_fs_internal)
 645 {
 646         struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
 647
 648         return bch2_fs_store(&c->kobj, attr, buf, size);
 649 }
 650 SYSFS_OPS(bch2_fs_internal);
 651
 652 struct attribute *bch2_fs_internal_files[] = {
 653         &sysfs_journal_debug,
 654         &sysfs_btree_updates,
 655         &sysfs_btree_cache,
 656         &sysfs_btree_key_cache,
 657         &sysfs_new_stripes,
 658         &sysfs_stripes_heap,
 659         &sysfs_open_buckets,
 660         &sysfs_open_buckets_partial,
 661         &sysfs_write_points,
 662 #ifdef BCH_WRITE_REF_DEBUG
 663         &sysfs_write_refs,
 664 #endif
 665         &sysfs_nocow_lock_table,
 666         &sysfs_io_timers_read,
 667         &sysfs_io_timers_write,
 668
 669         &sysfs_trigger_gc,
 670         &sysfs_trigger_discards,
 671         &sysfs_trigger_invalidates,
 672         &sysfs_prune_cache,
 673         &sysfs_btree_wakeup,
 674
 675         &sysfs_gc_gens_pos,
 676
 677         &sysfs_copy_gc_enabled,
 678         &sysfs_copy_gc_wait,
 679
 680         &sysfs_rebalance_enabled,
 681         &sysfs_rebalance_work,
 682         sysfs_pd_controller_files(rebalance),
 683
 684         &sysfs_data_jobs,
 685         &sysfs_moving_ctxts,
 686
 687         &sysfs_internal_uuid,
 688
 689         &sysfs_disk_groups,
 690         NULL
 691 };
 692
 693 /* options */
 694
 695 SHOW(bch2_fs_opts_dir)
 696 {
 697         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 698         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 699         int id = opt - bch2_opt_table;
 700         u64 v = bch2_opt_get_by_id(&c->opts, id);
 701
 702         bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
 703         prt_char(out, '\n');
 704
 705         return 0;
 706 }
 707
 708 STORE(bch2_fs_opts_dir)
 709 {
 710         struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
 711         const struct bch_option *opt = container_of(attr, struct bch_option, attr);
 712         int ret, id = opt - bch2_opt_table;
 713         char *tmp;
 714         u64 v;
 715
 716         /*
 717          * We don't need to take c->writes for correctness, but it eliminates an
 718          * unsightly error message in the dmesg log when we're RO:
 719          */
 720         if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
 721                 return -EROFS;
 722
 723         tmp = kstrdup(buf, GFP_KERNEL);
 724         if (!tmp) {
 725                 ret = -ENOMEM;
 726                 goto err;
 727         }
 728
 729         ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
 730         kfree(tmp);
 731
 732         if (ret < 0)
 733                 goto err;
 734
 735         ret = bch2_opt_check_may_set(c, id, v);
 736         if (ret < 0)
 737                 goto err;
 738
 739         bch2_opt_set_sb(c, opt, v);
 740         bch2_opt_set_by_id(&c->opts, id, v);
 741
 742         if ((id == Opt_background_target ||
 743              id == Opt_background_compression) && v) {
 744                 bch2_rebalance_add_work(c, S64_MAX);
 745                 rebalance_wakeup(c);
 746         }
 747
 748         ret = size;
 749 err:
 750         bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
 751         return ret;
 752 }
 753 SYSFS_OPS(bch2_fs_opts_dir);
 754
 755 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
 756
 757 int bch2_opts_create_sysfs_files(struct kobject *kobj)
 758 {
 759         const struct bch_option *i;
 760         int ret;
 761
 762         for (i = bch2_opt_table;
 763              i < bch2_opt_table + bch2_opts_nr;
 764              i++) {
 765                 if (!(i->flags & OPT_FS))
 766                         continue;
 767
 768                 ret = sysfs_create_file(kobj, &i->attr);
 769                 if (ret)
 770                         return ret;
 771         }
 772
 773         return 0;
 774 }
 775
 776 /* time stats */
 777
 778 SHOW(bch2_fs_time_stats)
 779 {
 780         struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
 781
 782 #define x(name)                                                         \
 783         if (attr == &sysfs_time_stat_##name)                            \
 784                 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
 785         BCH_TIME_STATS()
 786 #undef x
 787
 788         return 0;
 789 }
 790
 791 STORE(bch2_fs_time_stats)
 792 {
 793         return size;
 794 }
 795 SYSFS_OPS(bch2_fs_time_stats);
 796
 797 struct attribute *bch2_fs_time_stats_files[] = {
 798 #define x(name)                                         \
 799         &sysfs_time_stat_##name,
 800         BCH_TIME_STATS()
 801 #undef x
 802         NULL
 803 };
 804
 805 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
 806 {
 807         struct bch_fs *c = ca->fs;
 808         struct bch_dev_usage stats = bch2_dev_usage_read(ca);
 809         unsigned i, nr[BCH_DATA_NR];
 810
 811         memset(nr, 0, sizeof(nr));
 812
 813         for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
 814                 nr[c->open_buckets[i].data_type]++;
 815
 816         printbuf_tabstop_push(out, 8);
 817         printbuf_tabstop_push(out, 16);
 818         printbuf_tabstop_push(out, 16);
 819         printbuf_tabstop_push(out, 16);
 820         printbuf_tabstop_push(out, 16);
 821
 822         prt_tab(out);
 823         prt_str(out, "buckets");
 824         prt_tab_rjust(out);
 825         prt_str(out, "sectors");
 826         prt_tab_rjust(out);
 827         prt_str(out, "fragmented");
 828         prt_tab_rjust(out);
 829         prt_newline(out);
 830
 831         for (i = 0; i < BCH_DATA_NR; i++) {
 832                 prt_str(out, bch2_data_types[i]);
 833                 prt_tab(out);
 834                 prt_u64(out, stats.d[i].buckets);
 835                 prt_tab_rjust(out);
 836                 prt_u64(out, stats.d[i].sectors);
 837                 prt_tab_rjust(out);
 838                 prt_u64(out, stats.d[i].fragmented);
 839                 prt_tab_rjust(out);
 840                 prt_newline(out);
 841         }
 842
 843         prt_str(out, "ec");
 844         prt_tab(out);
 845         prt_u64(out, stats.buckets_ec);
 846         prt_tab_rjust(out);
 847         prt_newline(out);
 848
 849         prt_newline(out);
 850
 851         prt_printf(out, "reserves:");
 852         prt_newline(out);
 853         for (i = 0; i < BCH_WATERMARK_NR; i++) {
 854                 prt_str(out, bch2_watermarks[i]);
 855                 prt_tab(out);
 856                 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
 857                 prt_tab_rjust(out);
 858                 prt_newline(out);
 859         }
 860
 861         prt_newline(out);
 862
 863         printbuf_tabstops_reset(out);
 864         printbuf_tabstop_push(out, 24);
 865
 866         prt_str(out, "freelist_wait");
 867         prt_tab(out);
 868         prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
 869         prt_newline(out);
 870
 871         prt_str(out, "open buckets allocated");
 872         prt_tab(out);
 873         prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
 874         prt_newline(out);
 875
 876         prt_str(out, "open buckets this dev");
 877         prt_tab(out);
 878         prt_u64(out, ca->nr_open_buckets);
 879         prt_newline(out);
 880
 881         prt_str(out, "open buckets total");
 882         prt_tab(out);
 883         prt_u64(out, OPEN_BUCKETS_COUNT);
 884         prt_newline(out);
 885
 886         prt_str(out, "open_buckets_wait");
 887         prt_tab(out);
 888         prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
 889         prt_newline(out);
 890
 891         prt_str(out, "open_buckets_btree");
 892         prt_tab(out);
 893         prt_u64(out, nr[BCH_DATA_btree]);
 894         prt_newline(out);
 895
 896         prt_str(out, "open_buckets_user");
 897         prt_tab(out);
 898         prt_u64(out, nr[BCH_DATA_user]);
 899         prt_newline(out);
 900
 901         prt_str(out, "buckets_to_invalidate");
 902         prt_tab(out);
 903         prt_u64(out, should_invalidate_buckets(ca, stats));
 904         prt_newline(out);
 905
 906         prt_str(out, "btree reserve cache");
 907         prt_tab(out);
 908         prt_u64(out, c->btree_reserve_cache_nr);
 909         prt_newline(out);
 910 }
 911
 912 static const char * const bch2_rw[] = {
 913         "read",
 914         "write",
 915         NULL
 916 };
 917
 918 static void dev_iodone_to_text(struct printbuf *out, struct bch_dev *ca)
 919 {
 920         int rw, i;
 921
 922         for (rw = 0; rw < 2; rw++) {
 923                 prt_printf(out, "%s:\n", bch2_rw[rw]);
 924
 925                 for (i = 1; i < BCH_DATA_NR; i++)
 926                         prt_printf(out, "%-12s:%12llu\n",
 927                                bch2_data_types[i],
 928                                percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
 929         }
 930 }
 931
 932 SHOW(bch2_dev)
 933 {
 934         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 935         struct bch_fs *c = ca->fs;
 936
 937         sysfs_printf(uuid,              "%pU\n", ca->uuid.b);
 938
 939         sysfs_print(bucket_size,        bucket_bytes(ca));
 940         sysfs_print(first_bucket,       ca->mi.first_bucket);
 941         sysfs_print(nbuckets,           ca->mi.nbuckets);
 942         sysfs_print(durability,         ca->mi.durability);
 943         sysfs_print(discard,            ca->mi.discard);
 944
 945         if (attr == &sysfs_label) {
 946                 if (ca->mi.group) {
 947                         mutex_lock(&c->sb_lock);
 948                         bch2_disk_path_to_text(out, c->disk_sb.sb,
 949                                                ca->mi.group - 1);
 950                         mutex_unlock(&c->sb_lock);
 951                 }
 952
 953                 prt_char(out, '\n');
 954         }
 955
 956         if (attr == &sysfs_has_data) {
 957                 prt_bitflags(out, bch2_data_types, bch2_dev_has_data(c, ca));
 958                 prt_char(out, '\n');
 959         }
 960
 961         if (attr == &sysfs_state_rw) {
 962                 prt_string_option(out, bch2_member_states, ca->mi.state);
 963                 prt_char(out, '\n');
 964         }
 965
 966         if (attr == &sysfs_iodone)
 967                 dev_iodone_to_text(out, ca);
 968
 969         sysfs_print(io_latency_read,            atomic64_read(&ca->cur_latency[READ]));
 970         sysfs_print(io_latency_write,           atomic64_read(&ca->cur_latency[WRITE]));
 971
 972         if (attr == &sysfs_io_latency_stats_read)
 973                 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
 974
 975         if (attr == &sysfs_io_latency_stats_write)
 976                 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
 977
 978         sysfs_printf(congested,                 "%u%%",
 979                      clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
 980                      * 100 / CONGESTED_MAX);
 981
 982         if (attr == &sysfs_alloc_debug)
 983                 dev_alloc_debug_to_text(out, ca);
 984
 985         return 0;
 986 }
 987
 988 STORE(bch2_dev)
 989 {
 990         struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
 991         struct bch_fs *c = ca->fs;
 992         struct bch_member *mi;
 993
 994         if (attr == &sysfs_discard) {
 995                 bool v = strtoul_or_return(buf);
 996
 997                 mutex_lock(&c->sb_lock);
 998                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
 999
1000                 if (v != BCH_MEMBER_DISCARD(mi)) {
1001                         SET_BCH_MEMBER_DISCARD(mi, v);
1002                         bch2_write_super(c);
1003                 }
1004                 mutex_unlock(&c->sb_lock);
1005         }
1006
1007         if (attr == &sysfs_durability) {
1008                 u64 v = strtoul_or_return(buf);
1009
1010                 mutex_lock(&c->sb_lock);
1011                 mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
1012
1013                 if (v != BCH_MEMBER_DURABILITY(mi)) {
1014                         SET_BCH_MEMBER_DURABILITY(mi, v + 1);
1015                         bch2_write_super(c);
1016                 }
1017                 mutex_unlock(&c->sb_lock);
1018         }
1019
1020         if (attr == &sysfs_label) {
1021                 char *tmp;
1022                 int ret;
1023
1024                 tmp = kstrdup(buf, GFP_KERNEL);
1025                 if (!tmp)
1026                         return -ENOMEM;
1027
1028                 ret = bch2_dev_group_set(c, ca, strim(tmp));
1029                 kfree(tmp);
1030                 if (ret)
1031                         return ret;
1032         }
1033
1034         return size;
1035 }
1036 SYSFS_OPS(bch2_dev);
1037
1038 struct attribute *bch2_dev_files[] = {
1039         &sysfs_uuid,
1040         &sysfs_bucket_size,
1041         &sysfs_first_bucket,
1042         &sysfs_nbuckets,
1043         &sysfs_durability,
1044
1045         /* settings: */
1046         &sysfs_discard,
1047         &sysfs_state_rw,
1048         &sysfs_label,
1049
1050         &sysfs_has_data,
1051         &sysfs_iodone,
1052
1053         &sysfs_io_latency_read,
1054         &sysfs_io_latency_write,
1055         &sysfs_io_latency_stats_read,
1056         &sysfs_io_latency_stats_write,
1057         &sysfs_congested,
1058
1059         /* debug: */
1060         &sysfs_alloc_debug,
1061         NULL
1062 };
1063
1064 #endif  /* _BCACHEFS_SYSFS_H_ */