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 "compress.h"
25 #include "disk_groups.h"
26 #include "ec.h"
27 #include "inode.h"
28 #include "journal.h"
29 #include "keylist.h"
30 #include "move.h"
31 #include "movinggc.h"
32 #include "nocow_locking.h"
33 #include "opts.h"
34 #include "rebalance.h"
35 #include "replicas.h"
36 #include "super-io.h"
37 #include "tests.h"
38
39 #include <linux/blkdev.h>
40 #include <linux/sort.h>
41 #include <linux/sched/clock.h>
42
43 #include "util.h"
44
45 #define SYSFS_OPS(type) \
46 const struct sysfs_ops type ## _sysfs_ops = { \
47 .show = type ## _show, \
48 .store = type ## _store \
49 }
50
51 #define SHOW(fn) \
52 static ssize_t fn ## _to_text(struct printbuf *, \
53 struct kobject *, struct attribute *); \
54 \
55 static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
56 char *buf) \
57 { \
58 struct printbuf out = PRINTBUF; \
59 ssize_t ret = fn ## _to_text(&out, kobj, attr); \
60 \
61 if (out.pos && out.buf[out.pos - 1] != '\n') \
62 prt_newline(&out); \
63 \
64 if (!ret && out.allocation_failure) \
65 ret = -ENOMEM; \
66 \
67 if (!ret) { \
68 ret = min_t(size_t, out.pos, PAGE_SIZE - 1); \
69 memcpy(buf, out.buf, ret); \
70 } \
71 printbuf_exit(&out); \
72 return bch2_err_class(ret); \
73 } \
74 \
75 static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
76 struct attribute *attr)
77
78 #define STORE(fn) \
79 static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
80 const char *, size_t); \
81 \
82 static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
83 const char *buf, size_t size) \
84 { \
85 return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
86 } \
87 \
88 static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
89 const char *buf, size_t size)
90
91 #define __sysfs_attribute(_name, _mode) \
92 static struct attribute sysfs_##_name = \
93 { .name = #_name, .mode = _mode }
94
95 #define write_attribute(n) __sysfs_attribute(n, 0200)
96 #define read_attribute(n) __sysfs_attribute(n, 0444)
97 #define rw_attribute(n) __sysfs_attribute(n, 0644)
98
99 #define sysfs_printf(file, fmt, ...) \
100 do { \
101 if (attr == &sysfs_ ## file) \
102 prt_printf(out, fmt "\n", __VA_ARGS__); \
103 } while (0)
104
105 #define sysfs_print(file, var) \
106 do { \
107 if (attr == &sysfs_ ## file) \
108 snprint(out, var); \
109 } while (0)
110
111 #define sysfs_hprint(file, val) \
112 do { \
113 if (attr == &sysfs_ ## file) \
114 prt_human_readable_s64(out, val); \
115 } while (0)
116
117 #define sysfs_strtoul(file, var) \
118 do { \
119 if (attr == &sysfs_ ## file) \
120 return strtoul_safe(buf, var) ?: (ssize_t) size; \
121 } while (0)
122
123 #define sysfs_strtoul_clamp(file, var, min, max) \
124 do { \
125 if (attr == &sysfs_ ## file) \
126 return strtoul_safe_clamp(buf, var, min, max) \
127 ?: (ssize_t) size; \
128 } while (0)
129
130 #define strtoul_or_return(cp) \
131 ({ \
132 unsigned long _v; \
133 int _r = kstrtoul(cp, 10, &_v); \
134 if (_r) \
135 return _r; \
136 _v; \
137 })
138
139 write_attribute(trigger_gc);
140 write_attribute(trigger_discards);
141 write_attribute(trigger_invalidates);
142 write_attribute(prune_cache);
143 write_attribute(btree_wakeup);
144 rw_attribute(btree_gc_periodic);
145 rw_attribute(gc_gens_pos);
146
147 read_attribute(uuid);
148 read_attribute(minor);
149 read_attribute(flags);
150 read_attribute(bucket_size);
151 read_attribute(first_bucket);
152 read_attribute(nbuckets);
153 rw_attribute(durability);
154 read_attribute(io_done);
155 read_attribute(io_errors);
156 write_attribute(io_errors_reset);
157
158 read_attribute(io_latency_read);
159 read_attribute(io_latency_write);
160 read_attribute(io_latency_stats_read);
161 read_attribute(io_latency_stats_write);
162 read_attribute(congested);
163
164 read_attribute(btree_write_stats);
165
166 read_attribute(btree_cache_size);
167 read_attribute(compression_stats);
168 read_attribute(journal_debug);
169 read_attribute(btree_updates);
170 read_attribute(btree_cache);
171 read_attribute(btree_key_cache);
172 read_attribute(stripes_heap);
173 read_attribute(open_buckets);
174 read_attribute(open_buckets_partial);
175 read_attribute(write_points);
176 read_attribute(nocow_lock_table);
177
178 #ifdef BCH_WRITE_REF_DEBUG
179 read_attribute(write_refs);
180
181 static const char * const bch2_write_refs[] = {
182 #define x(n) #n,
183 BCH_WRITE_REFS()
184 #undef x
185 NULL
186 };
187
bch2_write_refs_to_text(struct printbuf * out,struct bch_fs * c)188 static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
189 {
190 bch2_printbuf_tabstop_push(out, 24);
191
192 for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
193 prt_str(out, bch2_write_refs[i]);
194 prt_tab(out);
195 prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
196 prt_newline(out);
197 }
198 }
199 #endif
200
201 read_attribute(internal_uuid);
202 read_attribute(disk_groups);
203
204 read_attribute(has_data);
205 read_attribute(alloc_debug);
206
207 #define x(t, n, ...) read_attribute(t);
208 BCH_PERSISTENT_COUNTERS()
209 #undef x
210
211 rw_attribute(discard);
212 rw_attribute(label);
213
214 rw_attribute(copy_gc_enabled);
215 read_attribute(copy_gc_wait);
216
217 rw_attribute(rebalance_enabled);
218 sysfs_pd_controller_attribute(rebalance);
219 read_attribute(rebalance_status);
220 rw_attribute(promote_whole_extents);
221
222 read_attribute(new_stripes);
223
224 read_attribute(io_timers_read);
225 read_attribute(io_timers_write);
226
227 read_attribute(moving_ctxts);
228
229 #ifdef CONFIG_BCACHEFS_TESTS
230 write_attribute(perf_test);
231 #endif /* CONFIG_BCACHEFS_TESTS */
232
233 #define x(_name) \
234 static struct attribute sysfs_time_stat_##_name = \
235 { .name = #_name, .mode = 0444 };
236 BCH_TIME_STATS()
237 #undef x
238
239 static struct attribute sysfs_state_rw = {
240 .name = "state",
241 .mode = 0444,
242 };
243
bch2_btree_cache_size(struct bch_fs * c)244 static size_t bch2_btree_cache_size(struct bch_fs *c)
245 {
246 size_t ret = 0;
247 struct btree *b;
248
249 mutex_lock(&c->btree_cache.lock);
250 list_for_each_entry(b, &c->btree_cache.live, list)
251 ret += btree_buf_bytes(b);
252
253 mutex_unlock(&c->btree_cache.lock);
254 return ret;
255 }
256
bch2_compression_stats_to_text(struct printbuf * out,struct bch_fs * c)257 static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
258 {
259 struct btree_trans *trans;
260 enum btree_id id;
261 struct compression_type_stats {
262 u64 nr_extents;
263 u64 sectors_compressed;
264 u64 sectors_uncompressed;
265 } s[BCH_COMPRESSION_TYPE_NR];
266 u64 compressed_incompressible = 0;
267 int ret = 0;
268
269 memset(s, 0, sizeof(s));
270
271 if (!test_bit(BCH_FS_started, &c->flags))
272 return -EPERM;
273
274 trans = bch2_trans_get(c);
275
276 for (id = 0; id < BTREE_ID_NR; id++) {
277 if (!btree_type_has_ptrs(id))
278 continue;
279
280 ret = for_each_btree_key(trans, iter, id, POS_MIN,
281 BTREE_ITER_ALL_SNAPSHOTS, k, ({
282 struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
283 struct bch_extent_crc_unpacked crc;
284 const union bch_extent_entry *entry;
285 bool compressed = false, incompressible = false;
286
287 bkey_for_each_crc(k.k, ptrs, crc, entry) {
288 incompressible |= crc.compression_type == BCH_COMPRESSION_TYPE_incompressible;
289 compressed |= crc_is_compressed(crc);
290
291 if (crc_is_compressed(crc)) {
292 s[crc.compression_type].nr_extents++;
293 s[crc.compression_type].sectors_compressed += crc.compressed_size;
294 s[crc.compression_type].sectors_uncompressed += crc.uncompressed_size;
295 }
296 }
297
298 compressed_incompressible += compressed && incompressible;
299
300 if (!compressed) {
301 unsigned t = incompressible ? BCH_COMPRESSION_TYPE_incompressible : 0;
302
303 s[t].nr_extents++;
304 s[t].sectors_compressed += k.k->size;
305 s[t].sectors_uncompressed += k.k->size;
306 }
307 0;
308 }));
309 }
310
311 bch2_trans_put(trans);
312
313 if (ret)
314 return ret;
315
316 prt_str(out, "type");
317 printbuf_tabstop_push(out, 12);
318 prt_tab(out);
319
320 prt_str(out, "compressed");
321 printbuf_tabstop_push(out, 16);
322 prt_tab_rjust(out);
323
324 prt_str(out, "uncompressed");
325 printbuf_tabstop_push(out, 16);
326 prt_tab_rjust(out);
327
328 prt_str(out, "average extent size");
329 printbuf_tabstop_push(out, 24);
330 prt_tab_rjust(out);
331 prt_newline(out);
332
333 for (unsigned i = 0; i < ARRAY_SIZE(s); i++) {
334 bch2_prt_compression_type(out, i);
335 prt_tab(out);
336
337 prt_human_readable_u64(out, s[i].sectors_compressed << 9);
338 prt_tab_rjust(out);
339
340 prt_human_readable_u64(out, s[i].sectors_uncompressed << 9);
341 prt_tab_rjust(out);
342
343 prt_human_readable_u64(out, s[i].nr_extents
344 ? div_u64(s[i].sectors_uncompressed << 9, s[i].nr_extents)
345 : 0);
346 prt_tab_rjust(out);
347 prt_newline(out);
348 }
349
350 if (compressed_incompressible) {
351 prt_printf(out, "%llu compressed & incompressible extents", compressed_incompressible);
352 prt_newline(out);
353 }
354
355 return 0;
356 }
357
bch2_gc_gens_pos_to_text(struct printbuf * out,struct bch_fs * c)358 static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
359 {
360 prt_printf(out, "%s: ", bch2_btree_id_str(c->gc_gens_btree));
361 bch2_bpos_to_text(out, c->gc_gens_pos);
362 prt_printf(out, "\n");
363 }
364
bch2_btree_wakeup_all(struct bch_fs * c)365 static void bch2_btree_wakeup_all(struct bch_fs *c)
366 {
367 struct btree_trans *trans;
368
369 seqmutex_lock(&c->btree_trans_lock);
370 list_for_each_entry(trans, &c->btree_trans_list, list) {
371 struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
372
373 if (b)
374 six_lock_wakeup_all(&b->lock);
375
376 }
377 seqmutex_unlock(&c->btree_trans_lock);
378 }
379
SHOW(bch2_fs)380 SHOW(bch2_fs)
381 {
382 struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
383
384 sysfs_print(minor, c->minor);
385 sysfs_printf(internal_uuid, "%pU", c->sb.uuid.b);
386
387 if (attr == &sysfs_flags)
388 prt_bitflags(out, bch2_fs_flag_strs, c->flags);
389
390 sysfs_hprint(btree_cache_size, bch2_btree_cache_size(c));
391
392 if (attr == &sysfs_btree_write_stats)
393 bch2_btree_write_stats_to_text(out, c);
394
395 sysfs_printf(btree_gc_periodic, "%u", (int) c->btree_gc_periodic);
396
397 if (attr == &sysfs_gc_gens_pos)
398 bch2_gc_gens_pos_to_text(out, c);
399
400 sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
401
402 sysfs_printf(rebalance_enabled, "%i", c->rebalance.enabled);
403 sysfs_pd_controller_show(rebalance, &c->rebalance.pd); /* XXX */
404
405 if (attr == &sysfs_copy_gc_wait)
406 bch2_copygc_wait_to_text(out, c);
407
408 if (attr == &sysfs_rebalance_status)
409 bch2_rebalance_status_to_text(out, c);
410
411 sysfs_print(promote_whole_extents, c->promote_whole_extents);
412
413 /* Debugging: */
414
415 if (attr == &sysfs_journal_debug)
416 bch2_journal_debug_to_text(out, &c->journal);
417
418 if (attr == &sysfs_btree_updates)
419 bch2_btree_updates_to_text(out, c);
420
421 if (attr == &sysfs_btree_cache)
422 bch2_btree_cache_to_text(out, c);
423
424 if (attr == &sysfs_btree_key_cache)
425 bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
426
427 if (attr == &sysfs_stripes_heap)
428 bch2_stripes_heap_to_text(out, c);
429
430 if (attr == &sysfs_open_buckets)
431 bch2_open_buckets_to_text(out, c);
432
433 if (attr == &sysfs_open_buckets_partial)
434 bch2_open_buckets_partial_to_text(out, c);
435
436 if (attr == &sysfs_write_points)
437 bch2_write_points_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_moving_ctxts)
452 bch2_fs_moving_ctxts_to_text(out, c);
453
454 #ifdef BCH_WRITE_REF_DEBUG
455 if (attr == &sysfs_write_refs)
456 bch2_write_refs_to_text(out, c);
457 #endif
458
459 if (attr == &sysfs_nocow_lock_table)
460 bch2_nocow_locks_to_text(out, &c->nocow_locks);
461
462 if (attr == &sysfs_disk_groups)
463 bch2_disk_groups_to_text(out, c);
464
465 return 0;
466 }
467
STORE(bch2_fs)468 STORE(bch2_fs)
469 {
470 struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
471
472 if (attr == &sysfs_btree_gc_periodic) {
473 ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
474 ?: (ssize_t) size;
475
476 wake_up_process(c->gc_thread);
477 return ret;
478 }
479
480 if (attr == &sysfs_copy_gc_enabled) {
481 ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
482 ?: (ssize_t) size;
483
484 if (c->copygc_thread)
485 wake_up_process(c->copygc_thread);
486 return ret;
487 }
488
489 if (attr == &sysfs_rebalance_enabled) {
490 ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
491 ?: (ssize_t) size;
492
493 rebalance_wakeup(c);
494 return ret;
495 }
496
497 sysfs_pd_controller_store(rebalance, &c->rebalance.pd);
498
499 sysfs_strtoul(promote_whole_extents, c->promote_whole_extents);
500
501 /* Debugging: */
502
503 if (!test_bit(BCH_FS_started, &c->flags))
504 return -EPERM;
505
506 /* Debugging: */
507
508 if (!test_bit(BCH_FS_rw, &c->flags))
509 return -EROFS;
510
511 if (attr == &sysfs_prune_cache) {
512 struct shrink_control sc;
513
514 sc.gfp_mask = GFP_KERNEL;
515 sc.nr_to_scan = strtoul_or_return(buf);
516 c->btree_cache.shrink->scan_objects(c->btree_cache.shrink, &sc);
517 }
518
519 if (attr == &sysfs_btree_wakeup)
520 bch2_btree_wakeup_all(c);
521
522 if (attr == &sysfs_trigger_gc) {
523 /*
524 * Full gc is currently incompatible with btree key cache:
525 */
526 #if 0
527 down_read(&c->state_lock);
528 bch2_gc(c, false, false);
529 up_read(&c->state_lock);
530 #else
531 bch2_gc_gens(c);
532 #endif
533 }
534
535 if (attr == &sysfs_trigger_discards)
536 bch2_do_discards(c);
537
538 if (attr == &sysfs_trigger_invalidates)
539 bch2_do_invalidates(c);
540
541 #ifdef CONFIG_BCACHEFS_TESTS
542 if (attr == &sysfs_perf_test) {
543 char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
544 char *test = strsep(&p, " \t\n");
545 char *nr_str = strsep(&p, " \t\n");
546 char *threads_str = strsep(&p, " \t\n");
547 unsigned threads;
548 u64 nr;
549 int ret = -EINVAL;
550
551 if (threads_str &&
552 !(ret = kstrtouint(threads_str, 10, &threads)) &&
553 !(ret = bch2_strtoull_h(nr_str, &nr)))
554 ret = bch2_btree_perf_test(c, test, nr, threads);
555 kfree(tmp);
556
557 if (ret)
558 size = ret;
559 }
560 #endif
561 return size;
562 }
563 SYSFS_OPS(bch2_fs);
564
565 struct attribute *bch2_fs_files[] = {
566 &sysfs_minor,
567 &sysfs_btree_cache_size,
568 &sysfs_btree_write_stats,
569
570 &sysfs_promote_whole_extents,
571
572 &sysfs_compression_stats,
573
574 #ifdef CONFIG_BCACHEFS_TESTS
575 &sysfs_perf_test,
576 #endif
577 NULL
578 };
579
580 /* counters dir */
581
SHOW(bch2_fs_counters)582 SHOW(bch2_fs_counters)
583 {
584 struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
585 u64 counter = 0;
586 u64 counter_since_mount = 0;
587
588 printbuf_tabstop_push(out, 32);
589
590 #define x(t, ...) \
591 if (attr == &sysfs_##t) { \
592 counter = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
593 counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
594 prt_printf(out, "since mount:"); \
595 prt_tab(out); \
596 prt_human_readable_u64(out, counter_since_mount); \
597 prt_newline(out); \
598 \
599 prt_printf(out, "since filesystem creation:"); \
600 prt_tab(out); \
601 prt_human_readable_u64(out, counter); \
602 prt_newline(out); \
603 }
604 BCH_PERSISTENT_COUNTERS()
605 #undef x
606 return 0;
607 }
608
STORE(bch2_fs_counters)609 STORE(bch2_fs_counters) {
610 return 0;
611 }
612
613 SYSFS_OPS(bch2_fs_counters);
614
615 struct attribute *bch2_fs_counters_files[] = {
616 #define x(t, ...) \
617 &sysfs_##t,
618 BCH_PERSISTENT_COUNTERS()
619 #undef x
620 NULL
621 };
622 /* internal dir - just a wrapper */
623
SHOW(bch2_fs_internal)624 SHOW(bch2_fs_internal)
625 {
626 struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
627
628 return bch2_fs_to_text(out, &c->kobj, attr);
629 }
630
STORE(bch2_fs_internal)631 STORE(bch2_fs_internal)
632 {
633 struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
634
635 return bch2_fs_store(&c->kobj, attr, buf, size);
636 }
637 SYSFS_OPS(bch2_fs_internal);
638
639 struct attribute *bch2_fs_internal_files[] = {
640 &sysfs_flags,
641 &sysfs_journal_debug,
642 &sysfs_btree_updates,
643 &sysfs_btree_cache,
644 &sysfs_btree_key_cache,
645 &sysfs_new_stripes,
646 &sysfs_stripes_heap,
647 &sysfs_open_buckets,
648 &sysfs_open_buckets_partial,
649 &sysfs_write_points,
650 #ifdef BCH_WRITE_REF_DEBUG
651 &sysfs_write_refs,
652 #endif
653 &sysfs_nocow_lock_table,
654 &sysfs_io_timers_read,
655 &sysfs_io_timers_write,
656
657 &sysfs_trigger_gc,
658 &sysfs_trigger_discards,
659 &sysfs_trigger_invalidates,
660 &sysfs_prune_cache,
661 &sysfs_btree_wakeup,
662
663 &sysfs_gc_gens_pos,
664
665 &sysfs_copy_gc_enabled,
666 &sysfs_copy_gc_wait,
667
668 &sysfs_rebalance_enabled,
669 &sysfs_rebalance_status,
670 sysfs_pd_controller_files(rebalance),
671
672 &sysfs_moving_ctxts,
673
674 &sysfs_internal_uuid,
675
676 &sysfs_disk_groups,
677 NULL
678 };
679
680 /* options */
681
SHOW(bch2_fs_opts_dir)682 SHOW(bch2_fs_opts_dir)
683 {
684 struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
685 const struct bch_option *opt = container_of(attr, struct bch_option, attr);
686 int id = opt - bch2_opt_table;
687 u64 v = bch2_opt_get_by_id(&c->opts, id);
688
689 bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
690 prt_char(out, '\n');
691
692 return 0;
693 }
694
STORE(bch2_fs_opts_dir)695 STORE(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 ret, id = opt - bch2_opt_table;
700 char *tmp;
701 u64 v;
702
703 /*
704 * We don't need to take c->writes for correctness, but it eliminates an
705 * unsightly error message in the dmesg log when we're RO:
706 */
707 if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
708 return -EROFS;
709
710 tmp = kstrdup(buf, GFP_KERNEL);
711 if (!tmp) {
712 ret = -ENOMEM;
713 goto err;
714 }
715
716 ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
717 kfree(tmp);
718
719 if (ret < 0)
720 goto err;
721
722 ret = bch2_opt_check_may_set(c, id, v);
723 if (ret < 0)
724 goto err;
725
726 bch2_opt_set_sb(c, opt, v);
727 bch2_opt_set_by_id(&c->opts, id, v);
728
729 if (v &&
730 (id == Opt_background_target ||
731 id == Opt_background_compression ||
732 (id == Opt_compression && !c->opts.background_compression)))
733 bch2_set_rebalance_needs_scan(c, 0);
734
735 ret = size;
736 err:
737 bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
738 return ret;
739 }
740 SYSFS_OPS(bch2_fs_opts_dir);
741
742 struct attribute *bch2_fs_opts_dir_files[] = { NULL };
743
bch2_opts_create_sysfs_files(struct kobject * kobj)744 int bch2_opts_create_sysfs_files(struct kobject *kobj)
745 {
746 const struct bch_option *i;
747 int ret;
748
749 for (i = bch2_opt_table;
750 i < bch2_opt_table + bch2_opts_nr;
751 i++) {
752 if (!(i->flags & OPT_FS))
753 continue;
754
755 ret = sysfs_create_file(kobj, &i->attr);
756 if (ret)
757 return ret;
758 }
759
760 return 0;
761 }
762
763 /* time stats */
764
SHOW(bch2_fs_time_stats)765 SHOW(bch2_fs_time_stats)
766 {
767 struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
768
769 #define x(name) \
770 if (attr == &sysfs_time_stat_##name) \
771 bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
772 BCH_TIME_STATS()
773 #undef x
774
775 return 0;
776 }
777
STORE(bch2_fs_time_stats)778 STORE(bch2_fs_time_stats)
779 {
780 return size;
781 }
782 SYSFS_OPS(bch2_fs_time_stats);
783
784 struct attribute *bch2_fs_time_stats_files[] = {
785 #define x(name) \
786 &sysfs_time_stat_##name,
787 BCH_TIME_STATS()
788 #undef x
789 NULL
790 };
791
dev_alloc_debug_to_text(struct printbuf * out,struct bch_dev * ca)792 static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
793 {
794 struct bch_fs *c = ca->fs;
795 struct bch_dev_usage stats = bch2_dev_usage_read(ca);
796 unsigned i, nr[BCH_DATA_NR];
797
798 memset(nr, 0, sizeof(nr));
799
800 for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
801 nr[c->open_buckets[i].data_type]++;
802
803 printbuf_tabstop_push(out, 8);
804 printbuf_tabstop_push(out, 16);
805 printbuf_tabstop_push(out, 16);
806 printbuf_tabstop_push(out, 16);
807 printbuf_tabstop_push(out, 16);
808
809 bch2_dev_usage_to_text(out, &stats);
810
811 prt_newline(out);
812
813 prt_printf(out, "reserves:");
814 prt_newline(out);
815 for (i = 0; i < BCH_WATERMARK_NR; i++) {
816 prt_str(out, bch2_watermarks[i]);
817 prt_tab(out);
818 prt_u64(out, bch2_dev_buckets_reserved(ca, i));
819 prt_tab_rjust(out);
820 prt_newline(out);
821 }
822
823 prt_newline(out);
824
825 printbuf_tabstops_reset(out);
826 printbuf_tabstop_push(out, 24);
827
828 prt_str(out, "freelist_wait");
829 prt_tab(out);
830 prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
831 prt_newline(out);
832
833 prt_str(out, "open buckets allocated");
834 prt_tab(out);
835 prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
836 prt_newline(out);
837
838 prt_str(out, "open buckets this dev");
839 prt_tab(out);
840 prt_u64(out, ca->nr_open_buckets);
841 prt_newline(out);
842
843 prt_str(out, "open buckets total");
844 prt_tab(out);
845 prt_u64(out, OPEN_BUCKETS_COUNT);
846 prt_newline(out);
847
848 prt_str(out, "open_buckets_wait");
849 prt_tab(out);
850 prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
851 prt_newline(out);
852
853 prt_str(out, "open_buckets_btree");
854 prt_tab(out);
855 prt_u64(out, nr[BCH_DATA_btree]);
856 prt_newline(out);
857
858 prt_str(out, "open_buckets_user");
859 prt_tab(out);
860 prt_u64(out, nr[BCH_DATA_user]);
861 prt_newline(out);
862
863 prt_str(out, "buckets_to_invalidate");
864 prt_tab(out);
865 prt_u64(out, should_invalidate_buckets(ca, stats));
866 prt_newline(out);
867
868 prt_str(out, "btree reserve cache");
869 prt_tab(out);
870 prt_u64(out, c->btree_reserve_cache_nr);
871 prt_newline(out);
872 }
873
874 static const char * const bch2_rw[] = {
875 "read",
876 "write",
877 NULL
878 };
879
dev_io_done_to_text(struct printbuf * out,struct bch_dev * ca)880 static void dev_io_done_to_text(struct printbuf *out, struct bch_dev *ca)
881 {
882 int rw, i;
883
884 for (rw = 0; rw < 2; rw++) {
885 prt_printf(out, "%s:\n", bch2_rw[rw]);
886
887 for (i = 1; i < BCH_DATA_NR; i++)
888 prt_printf(out, "%-12s:%12llu\n",
889 bch2_data_type_str(i),
890 percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
891 }
892 }
893
SHOW(bch2_dev)894 SHOW(bch2_dev)
895 {
896 struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
897 struct bch_fs *c = ca->fs;
898
899 sysfs_printf(uuid, "%pU\n", ca->uuid.b);
900
901 sysfs_print(bucket_size, bucket_bytes(ca));
902 sysfs_print(first_bucket, ca->mi.first_bucket);
903 sysfs_print(nbuckets, ca->mi.nbuckets);
904 sysfs_print(durability, ca->mi.durability);
905 sysfs_print(discard, ca->mi.discard);
906
907 if (attr == &sysfs_label) {
908 if (ca->mi.group)
909 bch2_disk_path_to_text(out, c, ca->mi.group - 1);
910 prt_char(out, '\n');
911 }
912
913 if (attr == &sysfs_has_data) {
914 prt_bitflags(out, __bch2_data_types, bch2_dev_has_data(c, ca));
915 prt_char(out, '\n');
916 }
917
918 if (attr == &sysfs_state_rw) {
919 prt_string_option(out, bch2_member_states, ca->mi.state);
920 prt_char(out, '\n');
921 }
922
923 if (attr == &sysfs_io_done)
924 dev_io_done_to_text(out, ca);
925
926 if (attr == &sysfs_io_errors)
927 bch2_dev_io_errors_to_text(out, ca);
928
929 sysfs_print(io_latency_read, atomic64_read(&ca->cur_latency[READ]));
930 sysfs_print(io_latency_write, atomic64_read(&ca->cur_latency[WRITE]));
931
932 if (attr == &sysfs_io_latency_stats_read)
933 bch2_time_stats_to_text(out, &ca->io_latency[READ]);
934
935 if (attr == &sysfs_io_latency_stats_write)
936 bch2_time_stats_to_text(out, &ca->io_latency[WRITE]);
937
938 sysfs_printf(congested, "%u%%",
939 clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
940 * 100 / CONGESTED_MAX);
941
942 if (attr == &sysfs_alloc_debug)
943 dev_alloc_debug_to_text(out, ca);
944
945 return 0;
946 }
947
STORE(bch2_dev)948 STORE(bch2_dev)
949 {
950 struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
951 struct bch_fs *c = ca->fs;
952 struct bch_member *mi;
953
954 if (attr == &sysfs_discard) {
955 bool v = strtoul_or_return(buf);
956
957 mutex_lock(&c->sb_lock);
958 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
959
960 if (v != BCH_MEMBER_DISCARD(mi)) {
961 SET_BCH_MEMBER_DISCARD(mi, v);
962 bch2_write_super(c);
963 }
964 mutex_unlock(&c->sb_lock);
965 }
966
967 if (attr == &sysfs_durability) {
968 u64 v = strtoul_or_return(buf);
969
970 mutex_lock(&c->sb_lock);
971 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
972
973 if (v + 1 != BCH_MEMBER_DURABILITY(mi)) {
974 SET_BCH_MEMBER_DURABILITY(mi, v + 1);
975 bch2_write_super(c);
976 }
977 mutex_unlock(&c->sb_lock);
978 }
979
980 if (attr == &sysfs_label) {
981 char *tmp;
982 int ret;
983
984 tmp = kstrdup(buf, GFP_KERNEL);
985 if (!tmp)
986 return -ENOMEM;
987
988 ret = bch2_dev_group_set(c, ca, strim(tmp));
989 kfree(tmp);
990 if (ret)
991 return ret;
992 }
993
994 if (attr == &sysfs_io_errors_reset)
995 bch2_dev_errors_reset(ca);
996
997 return size;
998 }
999 SYSFS_OPS(bch2_dev);
1000
1001 struct attribute *bch2_dev_files[] = {
1002 &sysfs_uuid,
1003 &sysfs_bucket_size,
1004 &sysfs_first_bucket,
1005 &sysfs_nbuckets,
1006 &sysfs_durability,
1007
1008 /* settings: */
1009 &sysfs_discard,
1010 &sysfs_state_rw,
1011 &sysfs_label,
1012
1013 &sysfs_has_data,
1014 &sysfs_io_done,
1015 &sysfs_io_errors,
1016 &sysfs_io_errors_reset,
1017
1018 &sysfs_io_latency_read,
1019 &sysfs_io_latency_write,
1020 &sysfs_io_latency_stats_read,
1021 &sysfs_io_latency_stats_write,
1022 &sysfs_congested,
1023
1024 /* debug: */
1025 &sysfs_alloc_debug,
1026 NULL
1027 };
1028
1029 #endif /* _BCACHEFS_SYSFS_H_ */
1030