Commit | Line | Data |
---|---|---|
cafe5635 KO |
1 | /* |
2 | * bcache sysfs interfaces | |
3 | * | |
4 | * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com> | |
5 | * Copyright 2012 Google, Inc. | |
6 | */ | |
7 | ||
8 | #include "bcache.h" | |
9 | #include "sysfs.h" | |
10 | #include "btree.h" | |
11 | #include "request.h" | |
279afbad | 12 | #include "writeback.h" |
cafe5635 | 13 | |
c37511b8 | 14 | #include <linux/blkdev.h> |
cafe5635 KO |
15 | #include <linux/sort.h> |
16 | ||
17 | static const char * const cache_replacement_policies[] = { | |
18 | "lru", | |
19 | "fifo", | |
20 | "random", | |
21 | NULL | |
22 | }; | |
23 | ||
77c320eb KO |
24 | static const char * const error_actions[] = { |
25 | "unregister", | |
26 | "panic", | |
27 | NULL | |
28 | }; | |
29 | ||
cafe5635 KO |
30 | write_attribute(attach); |
31 | write_attribute(detach); | |
32 | write_attribute(unregister); | |
33 | write_attribute(stop); | |
34 | write_attribute(clear_stats); | |
35 | write_attribute(trigger_gc); | |
36 | write_attribute(prune_cache); | |
37 | write_attribute(flash_vol_create); | |
38 | ||
39 | read_attribute(bucket_size); | |
40 | read_attribute(block_size); | |
41 | read_attribute(nbuckets); | |
42 | read_attribute(tree_depth); | |
43 | read_attribute(root_usage_percent); | |
44 | read_attribute(priority_stats); | |
45 | read_attribute(btree_cache_size); | |
46 | read_attribute(btree_cache_max_chain); | |
47 | read_attribute(cache_available_percent); | |
48 | read_attribute(written); | |
49 | read_attribute(btree_written); | |
50 | read_attribute(metadata_written); | |
51 | read_attribute(active_journal_entries); | |
52 | ||
53 | sysfs_time_stats_attribute(btree_gc, sec, ms); | |
54 | sysfs_time_stats_attribute(btree_split, sec, us); | |
55 | sysfs_time_stats_attribute(btree_sort, ms, us); | |
56 | sysfs_time_stats_attribute(btree_read, ms, us); | |
57 | sysfs_time_stats_attribute(try_harder, ms, us); | |
58 | ||
59 | read_attribute(btree_nodes); | |
60 | read_attribute(btree_used_percent); | |
61 | read_attribute(average_key_size); | |
62 | read_attribute(dirty_data); | |
63 | read_attribute(bset_tree_stats); | |
64 | ||
65 | read_attribute(state); | |
66 | read_attribute(cache_read_races); | |
67 | read_attribute(writeback_keys_done); | |
68 | read_attribute(writeback_keys_failed); | |
69 | read_attribute(io_errors); | |
70 | read_attribute(congested); | |
71 | rw_attribute(congested_read_threshold_us); | |
72 | rw_attribute(congested_write_threshold_us); | |
73 | ||
74 | rw_attribute(sequential_cutoff); | |
cafe5635 KO |
75 | rw_attribute(data_csum); |
76 | rw_attribute(cache_mode); | |
77 | rw_attribute(writeback_metadata); | |
78 | rw_attribute(writeback_running); | |
79 | rw_attribute(writeback_percent); | |
80 | rw_attribute(writeback_delay); | |
81 | rw_attribute(writeback_rate); | |
82 | ||
83 | rw_attribute(writeback_rate_update_seconds); | |
84 | rw_attribute(writeback_rate_d_term); | |
85 | rw_attribute(writeback_rate_p_term_inverse); | |
cafe5635 KO |
86 | read_attribute(writeback_rate_debug); |
87 | ||
72c27061 KO |
88 | read_attribute(stripe_size); |
89 | read_attribute(partial_stripes_expensive); | |
90 | ||
cafe5635 KO |
91 | rw_attribute(synchronous); |
92 | rw_attribute(journal_delay_ms); | |
93 | rw_attribute(discard); | |
94 | rw_attribute(running); | |
95 | rw_attribute(label); | |
96 | rw_attribute(readahead); | |
77c320eb | 97 | rw_attribute(errors); |
cafe5635 KO |
98 | rw_attribute(io_error_limit); |
99 | rw_attribute(io_error_halflife); | |
100 | rw_attribute(verify); | |
5ceaaad7 | 101 | rw_attribute(bypass_torture_test); |
cafe5635 KO |
102 | rw_attribute(key_merging_disabled); |
103 | rw_attribute(gc_always_rewrite); | |
280481d0 | 104 | rw_attribute(expensive_debug_checks); |
cafe5635 KO |
105 | rw_attribute(cache_replacement_policy); |
106 | rw_attribute(btree_shrinker_disabled); | |
107 | rw_attribute(copy_gc_enabled); | |
108 | rw_attribute(size); | |
109 | ||
110 | SHOW(__bch_cached_dev) | |
111 | { | |
112 | struct cached_dev *dc = container_of(kobj, struct cached_dev, | |
113 | disk.kobj); | |
114 | const char *states[] = { "no cache", "clean", "dirty", "inconsistent" }; | |
115 | ||
116 | #define var(stat) (dc->stat) | |
117 | ||
118 | if (attr == &sysfs_cache_mode) | |
169ef1cf KO |
119 | return bch_snprint_string_list(buf, PAGE_SIZE, |
120 | bch_cache_modes + 1, | |
121 | BDEV_CACHE_MODE(&dc->sb)); | |
cafe5635 KO |
122 | |
123 | sysfs_printf(data_csum, "%i", dc->disk.data_csum); | |
124 | var_printf(verify, "%i"); | |
5ceaaad7 | 125 | var_printf(bypass_torture_test, "%i"); |
cafe5635 KO |
126 | var_printf(writeback_metadata, "%i"); |
127 | var_printf(writeback_running, "%i"); | |
128 | var_print(writeback_delay); | |
129 | var_print(writeback_percent); | |
16749c23 | 130 | sysfs_hprint(writeback_rate, dc->writeback_rate.rate << 9); |
cafe5635 KO |
131 | |
132 | var_print(writeback_rate_update_seconds); | |
133 | var_print(writeback_rate_d_term); | |
134 | var_print(writeback_rate_p_term_inverse); | |
cafe5635 KO |
135 | |
136 | if (attr == &sysfs_writeback_rate_debug) { | |
16749c23 | 137 | char rate[20]; |
cafe5635 | 138 | char dirty[20]; |
cafe5635 | 139 | char target[20]; |
16749c23 KO |
140 | char proportional[20]; |
141 | char derivative[20]; | |
142 | char change[20]; | |
143 | s64 next_io; | |
144 | ||
145 | bch_hprint(rate, dc->writeback_rate.rate << 9); | |
146 | bch_hprint(dirty, bcache_dev_sectors_dirty(&dc->disk) << 9); | |
169ef1cf | 147 | bch_hprint(target, dc->writeback_rate_target << 9); |
16749c23 KO |
148 | bch_hprint(proportional,dc->writeback_rate_proportional << 9); |
149 | bch_hprint(derivative, dc->writeback_rate_derivative << 9); | |
150 | bch_hprint(change, dc->writeback_rate_change << 9); | |
151 | ||
152 | next_io = div64_s64(dc->writeback_rate.next - local_clock(), | |
153 | NSEC_PER_MSEC); | |
cafe5635 KO |
154 | |
155 | return sprintf(buf, | |
16749c23 | 156 | "rate:\t\t%s/sec\n" |
cafe5635 | 157 | "dirty:\t\t%s\n" |
16749c23 KO |
158 | "target:\t\t%s\n" |
159 | "proportional:\t%s\n" | |
cafe5635 | 160 | "derivative:\t%s\n" |
16749c23 KO |
161 | "change:\t\t%s/sec\n" |
162 | "next io:\t%llims\n", | |
163 | rate, dirty, target, proportional, | |
164 | derivative, change, next_io); | |
cafe5635 KO |
165 | } |
166 | ||
167 | sysfs_hprint(dirty_data, | |
279afbad | 168 | bcache_dev_sectors_dirty(&dc->disk) << 9); |
cafe5635 | 169 | |
2d679fc7 | 170 | sysfs_hprint(stripe_size, dc->disk.stripe_size << 9); |
72c27061 KO |
171 | var_printf(partial_stripes_expensive, "%u"); |
172 | ||
cafe5635 KO |
173 | var_hprint(sequential_cutoff); |
174 | var_hprint(readahead); | |
175 | ||
176 | sysfs_print(running, atomic_read(&dc->running)); | |
177 | sysfs_print(state, states[BDEV_STATE(&dc->sb)]); | |
178 | ||
179 | if (attr == &sysfs_label) { | |
180 | memcpy(buf, dc->sb.label, SB_LABEL_SIZE); | |
181 | buf[SB_LABEL_SIZE + 1] = '\0'; | |
182 | strcat(buf, "\n"); | |
183 | return strlen(buf); | |
184 | } | |
185 | ||
186 | #undef var | |
187 | return 0; | |
188 | } | |
189 | SHOW_LOCKED(bch_cached_dev) | |
190 | ||
191 | STORE(__cached_dev) | |
192 | { | |
193 | struct cached_dev *dc = container_of(kobj, struct cached_dev, | |
194 | disk.kobj); | |
195 | unsigned v = size; | |
196 | struct cache_set *c; | |
ab9e1400 | 197 | struct kobj_uevent_env *env; |
cafe5635 KO |
198 | |
199 | #define d_strtoul(var) sysfs_strtoul(var, dc->var) | |
16749c23 | 200 | #define d_strtoul_nonzero(var) sysfs_strtoul_clamp(var, dc->var, 1, INT_MAX) |
cafe5635 KO |
201 | #define d_strtoi_h(var) sysfs_hatoi(var, dc->var) |
202 | ||
203 | sysfs_strtoul(data_csum, dc->disk.data_csum); | |
204 | d_strtoul(verify); | |
5ceaaad7 | 205 | d_strtoul(bypass_torture_test); |
cafe5635 KO |
206 | d_strtoul(writeback_metadata); |
207 | d_strtoul(writeback_running); | |
208 | d_strtoul(writeback_delay); | |
16749c23 | 209 | |
cafe5635 KO |
210 | sysfs_strtoul_clamp(writeback_percent, dc->writeback_percent, 0, 40); |
211 | ||
16749c23 KO |
212 | sysfs_strtoul_clamp(writeback_rate, |
213 | dc->writeback_rate.rate, 1, INT_MAX); | |
214 | ||
215 | d_strtoul_nonzero(writeback_rate_update_seconds); | |
cafe5635 | 216 | d_strtoul(writeback_rate_d_term); |
16749c23 | 217 | d_strtoul_nonzero(writeback_rate_p_term_inverse); |
cafe5635 | 218 | |
cafe5635 KO |
219 | d_strtoi_h(sequential_cutoff); |
220 | d_strtoi_h(readahead); | |
221 | ||
222 | if (attr == &sysfs_clear_stats) | |
223 | bch_cache_accounting_clear(&dc->accounting); | |
224 | ||
225 | if (attr == &sysfs_running && | |
226 | strtoul_or_return(buf)) | |
227 | bch_cached_dev_run(dc); | |
228 | ||
229 | if (attr == &sysfs_cache_mode) { | |
169ef1cf | 230 | ssize_t v = bch_read_string_list(buf, bch_cache_modes + 1); |
cafe5635 KO |
231 | |
232 | if (v < 0) | |
233 | return v; | |
234 | ||
235 | if ((unsigned) v != BDEV_CACHE_MODE(&dc->sb)) { | |
236 | SET_BDEV_CACHE_MODE(&dc->sb, v); | |
237 | bch_write_bdev_super(dc, NULL); | |
238 | } | |
239 | } | |
240 | ||
241 | if (attr == &sysfs_label) { | |
aee6f1cf GP |
242 | if (size > SB_LABEL_SIZE) |
243 | return -EINVAL; | |
244 | memcpy(dc->sb.label, buf, size); | |
245 | if (size < SB_LABEL_SIZE) | |
246 | dc->sb.label[size] = '\0'; | |
247 | if (size && dc->sb.label[size - 1] == '\n') | |
248 | dc->sb.label[size - 1] = '\0'; | |
cafe5635 KO |
249 | bch_write_bdev_super(dc, NULL); |
250 | if (dc->disk.c) { | |
251 | memcpy(dc->disk.c->uuids[dc->disk.id].label, | |
252 | buf, SB_LABEL_SIZE); | |
253 | bch_uuid_write(dc->disk.c); | |
254 | } | |
ab9e1400 | 255 | env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL); |
d2a65ce2 DC |
256 | if (!env) |
257 | return -ENOMEM; | |
ab9e1400 GP |
258 | add_uevent_var(env, "DRIVER=bcache"); |
259 | add_uevent_var(env, "CACHED_UUID=%pU", dc->sb.uuid), | |
260 | add_uevent_var(env, "CACHED_LABEL=%s", buf); | |
261 | kobject_uevent_env( | |
262 | &disk_to_dev(dc->disk.disk)->kobj, KOBJ_CHANGE, env->envp); | |
263 | kfree(env); | |
cafe5635 KO |
264 | } |
265 | ||
266 | if (attr == &sysfs_attach) { | |
169ef1cf | 267 | if (bch_parse_uuid(buf, dc->sb.set_uuid) < 16) |
cafe5635 KO |
268 | return -EINVAL; |
269 | ||
270 | list_for_each_entry(c, &bch_cache_sets, list) { | |
271 | v = bch_cached_dev_attach(dc, c); | |
272 | if (!v) | |
273 | return size; | |
274 | } | |
275 | ||
276 | pr_err("Can't attach %s: cache set not found", buf); | |
277 | size = v; | |
278 | } | |
279 | ||
280 | if (attr == &sysfs_detach && dc->disk.c) | |
281 | bch_cached_dev_detach(dc); | |
282 | ||
283 | if (attr == &sysfs_stop) | |
284 | bcache_device_stop(&dc->disk); | |
285 | ||
286 | return size; | |
287 | } | |
288 | ||
289 | STORE(bch_cached_dev) | |
290 | { | |
291 | struct cached_dev *dc = container_of(kobj, struct cached_dev, | |
292 | disk.kobj); | |
293 | ||
294 | mutex_lock(&bch_register_lock); | |
295 | size = __cached_dev_store(kobj, attr, buf, size); | |
296 | ||
297 | if (attr == &sysfs_writeback_running) | |
298 | bch_writeback_queue(dc); | |
299 | ||
300 | if (attr == &sysfs_writeback_percent) | |
301 | schedule_delayed_work(&dc->writeback_rate_update, | |
302 | dc->writeback_rate_update_seconds * HZ); | |
303 | ||
304 | mutex_unlock(&bch_register_lock); | |
305 | return size; | |
306 | } | |
307 | ||
308 | static struct attribute *bch_cached_dev_files[] = { | |
309 | &sysfs_attach, | |
310 | &sysfs_detach, | |
311 | &sysfs_stop, | |
312 | #if 0 | |
313 | &sysfs_data_csum, | |
314 | #endif | |
315 | &sysfs_cache_mode, | |
316 | &sysfs_writeback_metadata, | |
317 | &sysfs_writeback_running, | |
318 | &sysfs_writeback_delay, | |
319 | &sysfs_writeback_percent, | |
320 | &sysfs_writeback_rate, | |
321 | &sysfs_writeback_rate_update_seconds, | |
322 | &sysfs_writeback_rate_d_term, | |
323 | &sysfs_writeback_rate_p_term_inverse, | |
cafe5635 KO |
324 | &sysfs_writeback_rate_debug, |
325 | &sysfs_dirty_data, | |
72c27061 KO |
326 | &sysfs_stripe_size, |
327 | &sysfs_partial_stripes_expensive, | |
cafe5635 | 328 | &sysfs_sequential_cutoff, |
cafe5635 KO |
329 | &sysfs_clear_stats, |
330 | &sysfs_running, | |
331 | &sysfs_state, | |
332 | &sysfs_label, | |
333 | &sysfs_readahead, | |
334 | #ifdef CONFIG_BCACHE_DEBUG | |
335 | &sysfs_verify, | |
5ceaaad7 | 336 | &sysfs_bypass_torture_test, |
cafe5635 KO |
337 | #endif |
338 | NULL | |
339 | }; | |
340 | KTYPE(bch_cached_dev); | |
341 | ||
342 | SHOW(bch_flash_dev) | |
343 | { | |
344 | struct bcache_device *d = container_of(kobj, struct bcache_device, | |
345 | kobj); | |
346 | struct uuid_entry *u = &d->c->uuids[d->id]; | |
347 | ||
348 | sysfs_printf(data_csum, "%i", d->data_csum); | |
349 | sysfs_hprint(size, u->sectors << 9); | |
350 | ||
351 | if (attr == &sysfs_label) { | |
352 | memcpy(buf, u->label, SB_LABEL_SIZE); | |
353 | buf[SB_LABEL_SIZE + 1] = '\0'; | |
354 | strcat(buf, "\n"); | |
355 | return strlen(buf); | |
356 | } | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | STORE(__bch_flash_dev) | |
362 | { | |
363 | struct bcache_device *d = container_of(kobj, struct bcache_device, | |
364 | kobj); | |
365 | struct uuid_entry *u = &d->c->uuids[d->id]; | |
366 | ||
367 | sysfs_strtoul(data_csum, d->data_csum); | |
368 | ||
369 | if (attr == &sysfs_size) { | |
370 | uint64_t v; | |
371 | strtoi_h_or_return(buf, v); | |
372 | ||
373 | u->sectors = v >> 9; | |
374 | bch_uuid_write(d->c); | |
375 | set_capacity(d->disk, u->sectors); | |
376 | } | |
377 | ||
378 | if (attr == &sysfs_label) { | |
379 | memcpy(u->label, buf, SB_LABEL_SIZE); | |
380 | bch_uuid_write(d->c); | |
381 | } | |
382 | ||
383 | if (attr == &sysfs_unregister) { | |
c4d951dd | 384 | set_bit(BCACHE_DEV_DETACHING, &d->flags); |
cafe5635 KO |
385 | bcache_device_stop(d); |
386 | } | |
387 | ||
388 | return size; | |
389 | } | |
390 | STORE_LOCKED(bch_flash_dev) | |
391 | ||
392 | static struct attribute *bch_flash_dev_files[] = { | |
393 | &sysfs_unregister, | |
394 | #if 0 | |
395 | &sysfs_data_csum, | |
396 | #endif | |
397 | &sysfs_label, | |
398 | &sysfs_size, | |
399 | NULL | |
400 | }; | |
401 | KTYPE(bch_flash_dev); | |
402 | ||
f67342dd KO |
403 | struct bset_stats_op { |
404 | struct btree_op op; | |
405 | size_t nodes; | |
406 | struct bset_stats stats; | |
407 | }; | |
408 | ||
409 | static int btree_bset_stats(struct btree_op *b_op, struct btree *b) | |
410 | { | |
411 | struct bset_stats_op *op = container_of(b_op, struct bset_stats_op, op); | |
412 | ||
413 | op->nodes++; | |
414 | bch_btree_keys_stats(&b->keys, &op->stats); | |
415 | ||
416 | return MAP_CONTINUE; | |
417 | } | |
418 | ||
3572324a | 419 | static int bch_bset_print_stats(struct cache_set *c, char *buf) |
f67342dd KO |
420 | { |
421 | struct bset_stats_op op; | |
422 | int ret; | |
423 | ||
424 | memset(&op, 0, sizeof(op)); | |
425 | bch_btree_op_init(&op.op, -1); | |
426 | ||
427 | ret = bch_btree_map_nodes(&op.op, c, &ZERO_KEY, btree_bset_stats); | |
428 | if (ret < 0) | |
429 | return ret; | |
430 | ||
431 | return snprintf(buf, PAGE_SIZE, | |
432 | "btree nodes: %zu\n" | |
433 | "written sets: %zu\n" | |
434 | "unwritten sets: %zu\n" | |
435 | "written key bytes: %zu\n" | |
436 | "unwritten key bytes: %zu\n" | |
437 | "floats: %zu\n" | |
438 | "failed: %zu\n", | |
439 | op.nodes, | |
440 | op.stats.sets_written, op.stats.sets_unwritten, | |
441 | op.stats.bytes_written, op.stats.bytes_unwritten, | |
442 | op.stats.floats, op.stats.failed); | |
443 | } | |
444 | ||
cafe5635 KO |
445 | SHOW(__bch_cache_set) |
446 | { | |
447 | unsigned root_usage(struct cache_set *c) | |
448 | { | |
449 | unsigned bytes = 0; | |
450 | struct bkey *k; | |
451 | struct btree *b; | |
452 | struct btree_iter iter; | |
453 | ||
454 | goto lock_root; | |
455 | ||
456 | do { | |
457 | rw_unlock(false, b); | |
458 | lock_root: | |
459 | b = c->root; | |
460 | rw_lock(false, b, b->level); | |
461 | } while (b != c->root); | |
462 | ||
c052dd9a | 463 | for_each_key_filter(&b->keys, k, &iter, bch_ptr_bad) |
cafe5635 KO |
464 | bytes += bkey_bytes(k); |
465 | ||
466 | rw_unlock(false, b); | |
467 | ||
468 | return (bytes * 100) / btree_bytes(c); | |
469 | } | |
470 | ||
471 | size_t cache_size(struct cache_set *c) | |
472 | { | |
473 | size_t ret = 0; | |
474 | struct btree *b; | |
475 | ||
476 | mutex_lock(&c->bucket_lock); | |
477 | list_for_each_entry(b, &c->btree_cache, list) | |
a85e968e | 478 | ret += 1 << (b->keys.page_order + PAGE_SHIFT); |
cafe5635 KO |
479 | |
480 | mutex_unlock(&c->bucket_lock); | |
481 | return ret; | |
482 | } | |
483 | ||
484 | unsigned cache_max_chain(struct cache_set *c) | |
485 | { | |
486 | unsigned ret = 0; | |
487 | struct hlist_head *h; | |
488 | ||
489 | mutex_lock(&c->bucket_lock); | |
490 | ||
491 | for (h = c->bucket_hash; | |
492 | h < c->bucket_hash + (1 << BUCKET_HASH_BITS); | |
493 | h++) { | |
494 | unsigned i = 0; | |
495 | struct hlist_node *p; | |
496 | ||
497 | hlist_for_each(p, h) | |
498 | i++; | |
499 | ||
500 | ret = max(ret, i); | |
501 | } | |
502 | ||
503 | mutex_unlock(&c->bucket_lock); | |
504 | return ret; | |
505 | } | |
506 | ||
507 | unsigned btree_used(struct cache_set *c) | |
508 | { | |
509 | return div64_u64(c->gc_stats.key_bytes * 100, | |
510 | (c->gc_stats.nodes ?: 1) * btree_bytes(c)); | |
511 | } | |
512 | ||
513 | unsigned average_key_size(struct cache_set *c) | |
514 | { | |
515 | return c->gc_stats.nkeys | |
516 | ? div64_u64(c->gc_stats.data, c->gc_stats.nkeys) | |
517 | : 0; | |
518 | } | |
519 | ||
520 | struct cache_set *c = container_of(kobj, struct cache_set, kobj); | |
521 | ||
522 | sysfs_print(synchronous, CACHE_SYNC(&c->sb)); | |
523 | sysfs_print(journal_delay_ms, c->journal_delay_ms); | |
524 | sysfs_hprint(bucket_size, bucket_bytes(c)); | |
525 | sysfs_hprint(block_size, block_bytes(c)); | |
526 | sysfs_print(tree_depth, c->root->level); | |
527 | sysfs_print(root_usage_percent, root_usage(c)); | |
528 | ||
529 | sysfs_hprint(btree_cache_size, cache_size(c)); | |
530 | sysfs_print(btree_cache_max_chain, cache_max_chain(c)); | |
531 | sysfs_print(cache_available_percent, 100 - c->gc_stats.in_use); | |
532 | ||
533 | sysfs_print_time_stats(&c->btree_gc_time, btree_gc, sec, ms); | |
534 | sysfs_print_time_stats(&c->btree_split_time, btree_split, sec, us); | |
67539e85 | 535 | sysfs_print_time_stats(&c->sort.time, btree_sort, ms, us); |
cafe5635 KO |
536 | sysfs_print_time_stats(&c->btree_read_time, btree_read, ms, us); |
537 | sysfs_print_time_stats(&c->try_harder_time, try_harder, ms, us); | |
538 | ||
539 | sysfs_print(btree_used_percent, btree_used(c)); | |
540 | sysfs_print(btree_nodes, c->gc_stats.nodes); | |
cafe5635 KO |
541 | sysfs_hprint(average_key_size, average_key_size(c)); |
542 | ||
543 | sysfs_print(cache_read_races, | |
544 | atomic_long_read(&c->cache_read_races)); | |
545 | ||
546 | sysfs_print(writeback_keys_done, | |
547 | atomic_long_read(&c->writeback_keys_done)); | |
548 | sysfs_print(writeback_keys_failed, | |
549 | atomic_long_read(&c->writeback_keys_failed)); | |
550 | ||
77c320eb KO |
551 | if (attr == &sysfs_errors) |
552 | return bch_snprint_string_list(buf, PAGE_SIZE, error_actions, | |
553 | c->on_error); | |
554 | ||
cafe5635 KO |
555 | /* See count_io_errors for why 88 */ |
556 | sysfs_print(io_error_halflife, c->error_decay * 88); | |
557 | sysfs_print(io_error_limit, c->error_limit >> IO_ERROR_SHIFT); | |
558 | ||
559 | sysfs_hprint(congested, | |
560 | ((uint64_t) bch_get_congested(c)) << 9); | |
561 | sysfs_print(congested_read_threshold_us, | |
562 | c->congested_read_threshold_us); | |
563 | sysfs_print(congested_write_threshold_us, | |
564 | c->congested_write_threshold_us); | |
565 | ||
566 | sysfs_print(active_journal_entries, fifo_used(&c->journal.pin)); | |
567 | sysfs_printf(verify, "%i", c->verify); | |
568 | sysfs_printf(key_merging_disabled, "%i", c->key_merging_disabled); | |
280481d0 KO |
569 | sysfs_printf(expensive_debug_checks, |
570 | "%i", c->expensive_debug_checks); | |
cafe5635 KO |
571 | sysfs_printf(gc_always_rewrite, "%i", c->gc_always_rewrite); |
572 | sysfs_printf(btree_shrinker_disabled, "%i", c->shrinker_disabled); | |
573 | sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled); | |
574 | ||
575 | if (attr == &sysfs_bset_tree_stats) | |
576 | return bch_bset_print_stats(c, buf); | |
577 | ||
578 | return 0; | |
579 | } | |
580 | SHOW_LOCKED(bch_cache_set) | |
581 | ||
582 | STORE(__bch_cache_set) | |
583 | { | |
584 | struct cache_set *c = container_of(kobj, struct cache_set, kobj); | |
585 | ||
586 | if (attr == &sysfs_unregister) | |
587 | bch_cache_set_unregister(c); | |
588 | ||
589 | if (attr == &sysfs_stop) | |
590 | bch_cache_set_stop(c); | |
591 | ||
592 | if (attr == &sysfs_synchronous) { | |
593 | bool sync = strtoul_or_return(buf); | |
594 | ||
595 | if (sync != CACHE_SYNC(&c->sb)) { | |
596 | SET_CACHE_SYNC(&c->sb, sync); | |
597 | bcache_write_super(c); | |
598 | } | |
599 | } | |
600 | ||
601 | if (attr == &sysfs_flash_vol_create) { | |
602 | int r; | |
603 | uint64_t v; | |
604 | strtoi_h_or_return(buf, v); | |
605 | ||
606 | r = bch_flash_dev_create(c, v); | |
607 | if (r) | |
608 | return r; | |
609 | } | |
610 | ||
611 | if (attr == &sysfs_clear_stats) { | |
612 | atomic_long_set(&c->writeback_keys_done, 0); | |
613 | atomic_long_set(&c->writeback_keys_failed, 0); | |
614 | ||
615 | memset(&c->gc_stats, 0, sizeof(struct gc_stat)); | |
616 | bch_cache_accounting_clear(&c->accounting); | |
617 | } | |
618 | ||
619 | if (attr == &sysfs_trigger_gc) | |
72a44517 | 620 | wake_up_gc(c); |
cafe5635 KO |
621 | |
622 | if (attr == &sysfs_prune_cache) { | |
623 | struct shrink_control sc; | |
624 | sc.gfp_mask = GFP_KERNEL; | |
625 | sc.nr_to_scan = strtoul_or_return(buf); | |
7dc19d5a | 626 | c->shrink.scan_objects(&c->shrink, &sc); |
cafe5635 KO |
627 | } |
628 | ||
629 | sysfs_strtoul(congested_read_threshold_us, | |
630 | c->congested_read_threshold_us); | |
631 | sysfs_strtoul(congested_write_threshold_us, | |
632 | c->congested_write_threshold_us); | |
633 | ||
77c320eb KO |
634 | if (attr == &sysfs_errors) { |
635 | ssize_t v = bch_read_string_list(buf, error_actions); | |
636 | ||
637 | if (v < 0) | |
638 | return v; | |
639 | ||
640 | c->on_error = v; | |
641 | } | |
642 | ||
cafe5635 KO |
643 | if (attr == &sysfs_io_error_limit) |
644 | c->error_limit = strtoul_or_return(buf) << IO_ERROR_SHIFT; | |
645 | ||
646 | /* See count_io_errors() for why 88 */ | |
647 | if (attr == &sysfs_io_error_halflife) | |
648 | c->error_decay = strtoul_or_return(buf) / 88; | |
649 | ||
650 | sysfs_strtoul(journal_delay_ms, c->journal_delay_ms); | |
651 | sysfs_strtoul(verify, c->verify); | |
652 | sysfs_strtoul(key_merging_disabled, c->key_merging_disabled); | |
280481d0 | 653 | sysfs_strtoul(expensive_debug_checks, c->expensive_debug_checks); |
cafe5635 KO |
654 | sysfs_strtoul(gc_always_rewrite, c->gc_always_rewrite); |
655 | sysfs_strtoul(btree_shrinker_disabled, c->shrinker_disabled); | |
656 | sysfs_strtoul(copy_gc_enabled, c->copy_gc_enabled); | |
657 | ||
658 | return size; | |
659 | } | |
660 | STORE_LOCKED(bch_cache_set) | |
661 | ||
662 | SHOW(bch_cache_set_internal) | |
663 | { | |
664 | struct cache_set *c = container_of(kobj, struct cache_set, internal); | |
665 | return bch_cache_set_show(&c->kobj, attr, buf); | |
666 | } | |
667 | ||
668 | STORE(bch_cache_set_internal) | |
669 | { | |
670 | struct cache_set *c = container_of(kobj, struct cache_set, internal); | |
671 | return bch_cache_set_store(&c->kobj, attr, buf, size); | |
672 | } | |
673 | ||
674 | static void bch_cache_set_internal_release(struct kobject *k) | |
675 | { | |
676 | } | |
677 | ||
678 | static struct attribute *bch_cache_set_files[] = { | |
679 | &sysfs_unregister, | |
680 | &sysfs_stop, | |
681 | &sysfs_synchronous, | |
682 | &sysfs_journal_delay_ms, | |
683 | &sysfs_flash_vol_create, | |
684 | ||
685 | &sysfs_bucket_size, | |
686 | &sysfs_block_size, | |
687 | &sysfs_tree_depth, | |
688 | &sysfs_root_usage_percent, | |
689 | &sysfs_btree_cache_size, | |
690 | &sysfs_cache_available_percent, | |
691 | ||
692 | &sysfs_average_key_size, | |
cafe5635 | 693 | |
77c320eb | 694 | &sysfs_errors, |
cafe5635 KO |
695 | &sysfs_io_error_limit, |
696 | &sysfs_io_error_halflife, | |
697 | &sysfs_congested, | |
698 | &sysfs_congested_read_threshold_us, | |
699 | &sysfs_congested_write_threshold_us, | |
700 | &sysfs_clear_stats, | |
701 | NULL | |
702 | }; | |
703 | KTYPE(bch_cache_set); | |
704 | ||
705 | static struct attribute *bch_cache_set_internal_files[] = { | |
706 | &sysfs_active_journal_entries, | |
707 | ||
708 | sysfs_time_stats_attribute_list(btree_gc, sec, ms) | |
709 | sysfs_time_stats_attribute_list(btree_split, sec, us) | |
710 | sysfs_time_stats_attribute_list(btree_sort, ms, us) | |
711 | sysfs_time_stats_attribute_list(btree_read, ms, us) | |
712 | sysfs_time_stats_attribute_list(try_harder, ms, us) | |
713 | ||
714 | &sysfs_btree_nodes, | |
715 | &sysfs_btree_used_percent, | |
716 | &sysfs_btree_cache_max_chain, | |
717 | ||
718 | &sysfs_bset_tree_stats, | |
719 | &sysfs_cache_read_races, | |
720 | &sysfs_writeback_keys_done, | |
721 | &sysfs_writeback_keys_failed, | |
722 | ||
723 | &sysfs_trigger_gc, | |
724 | &sysfs_prune_cache, | |
725 | #ifdef CONFIG_BCACHE_DEBUG | |
726 | &sysfs_verify, | |
727 | &sysfs_key_merging_disabled, | |
280481d0 | 728 | &sysfs_expensive_debug_checks, |
cafe5635 KO |
729 | #endif |
730 | &sysfs_gc_always_rewrite, | |
731 | &sysfs_btree_shrinker_disabled, | |
732 | &sysfs_copy_gc_enabled, | |
733 | NULL | |
734 | }; | |
735 | KTYPE(bch_cache_set_internal); | |
736 | ||
737 | SHOW(__bch_cache) | |
738 | { | |
739 | struct cache *ca = container_of(kobj, struct cache, kobj); | |
740 | ||
741 | sysfs_hprint(bucket_size, bucket_bytes(ca)); | |
742 | sysfs_hprint(block_size, block_bytes(ca)); | |
743 | sysfs_print(nbuckets, ca->sb.nbuckets); | |
744 | sysfs_print(discard, ca->discard); | |
745 | sysfs_hprint(written, atomic_long_read(&ca->sectors_written) << 9); | |
746 | sysfs_hprint(btree_written, | |
747 | atomic_long_read(&ca->btree_sectors_written) << 9); | |
748 | sysfs_hprint(metadata_written, | |
749 | (atomic_long_read(&ca->meta_sectors_written) + | |
750 | atomic_long_read(&ca->btree_sectors_written)) << 9); | |
751 | ||
752 | sysfs_print(io_errors, | |
753 | atomic_read(&ca->io_errors) >> IO_ERROR_SHIFT); | |
754 | ||
cafe5635 | 755 | if (attr == &sysfs_cache_replacement_policy) |
169ef1cf KO |
756 | return bch_snprint_string_list(buf, PAGE_SIZE, |
757 | cache_replacement_policies, | |
758 | CACHE_REPLACEMENT(&ca->sb)); | |
cafe5635 KO |
759 | |
760 | if (attr == &sysfs_priority_stats) { | |
761 | int cmp(const void *l, const void *r) | |
762 | { return *((uint16_t *) r) - *((uint16_t *) l); } | |
763 | ||
cafe5635 KO |
764 | size_t n = ca->sb.nbuckets, i, unused, btree; |
765 | uint64_t sum = 0; | |
bbc77aa7 KO |
766 | /* Compute 31 quantiles */ |
767 | uint16_t q[31], *p, *cached; | |
cafe5635 KO |
768 | ssize_t ret; |
769 | ||
770 | cached = p = vmalloc(ca->sb.nbuckets * sizeof(uint16_t)); | |
771 | if (!p) | |
772 | return -ENOMEM; | |
773 | ||
774 | mutex_lock(&ca->set->bucket_lock); | |
775 | for (i = ca->sb.first_bucket; i < n; i++) | |
776 | p[i] = ca->buckets[i].prio; | |
777 | mutex_unlock(&ca->set->bucket_lock); | |
778 | ||
779 | sort(p, n, sizeof(uint16_t), cmp, NULL); | |
780 | ||
781 | while (n && | |
782 | !cached[n - 1]) | |
783 | --n; | |
784 | ||
785 | unused = ca->sb.nbuckets - n; | |
786 | ||
787 | while (cached < p + n && | |
788 | *cached == BTREE_PRIO) | |
789 | cached++; | |
790 | ||
791 | btree = cached - p; | |
792 | n -= btree; | |
793 | ||
794 | for (i = 0; i < n; i++) | |
795 | sum += INITIAL_PRIO - cached[i]; | |
796 | ||
797 | if (n) | |
798 | do_div(sum, n); | |
799 | ||
bbc77aa7 KO |
800 | for (i = 0; i < ARRAY_SIZE(q); i++) |
801 | q[i] = INITIAL_PRIO - cached[n * (i + 1) / | |
802 | (ARRAY_SIZE(q) + 1)]; | |
cafe5635 KO |
803 | |
804 | vfree(p); | |
805 | ||
bbc77aa7 KO |
806 | ret = scnprintf(buf, PAGE_SIZE, |
807 | "Unused: %zu%%\n" | |
808 | "Metadata: %zu%%\n" | |
809 | "Average: %llu\n" | |
810 | "Sectors per Q: %zu\n" | |
811 | "Quantiles: [", | |
812 | unused * 100 / (size_t) ca->sb.nbuckets, | |
813 | btree * 100 / (size_t) ca->sb.nbuckets, sum, | |
814 | n * ca->sb.bucket_size / (ARRAY_SIZE(q) + 1)); | |
815 | ||
816 | for (i = 0; i < ARRAY_SIZE(q); i++) | |
817 | ret += scnprintf(buf + ret, PAGE_SIZE - ret, | |
818 | "%u ", q[i]); | |
819 | ret--; | |
820 | ||
821 | ret += scnprintf(buf + ret, PAGE_SIZE - ret, "]\n"); | |
822 | ||
cafe5635 KO |
823 | return ret; |
824 | } | |
825 | ||
826 | return 0; | |
827 | } | |
828 | SHOW_LOCKED(bch_cache) | |
829 | ||
830 | STORE(__bch_cache) | |
831 | { | |
832 | struct cache *ca = container_of(kobj, struct cache, kobj); | |
833 | ||
834 | if (attr == &sysfs_discard) { | |
835 | bool v = strtoul_or_return(buf); | |
836 | ||
837 | if (blk_queue_discard(bdev_get_queue(ca->bdev))) | |
838 | ca->discard = v; | |
839 | ||
840 | if (v != CACHE_DISCARD(&ca->sb)) { | |
841 | SET_CACHE_DISCARD(&ca->sb, v); | |
842 | bcache_write_super(ca->set); | |
843 | } | |
844 | } | |
845 | ||
846 | if (attr == &sysfs_cache_replacement_policy) { | |
169ef1cf | 847 | ssize_t v = bch_read_string_list(buf, cache_replacement_policies); |
cafe5635 KO |
848 | |
849 | if (v < 0) | |
850 | return v; | |
851 | ||
852 | if ((unsigned) v != CACHE_REPLACEMENT(&ca->sb)) { | |
853 | mutex_lock(&ca->set->bucket_lock); | |
854 | SET_CACHE_REPLACEMENT(&ca->sb, v); | |
855 | mutex_unlock(&ca->set->bucket_lock); | |
856 | ||
857 | bcache_write_super(ca->set); | |
858 | } | |
859 | } | |
860 | ||
cafe5635 KO |
861 | if (attr == &sysfs_clear_stats) { |
862 | atomic_long_set(&ca->sectors_written, 0); | |
863 | atomic_long_set(&ca->btree_sectors_written, 0); | |
864 | atomic_long_set(&ca->meta_sectors_written, 0); | |
865 | atomic_set(&ca->io_count, 0); | |
866 | atomic_set(&ca->io_errors, 0); | |
867 | } | |
868 | ||
869 | return size; | |
870 | } | |
871 | STORE_LOCKED(bch_cache) | |
872 | ||
873 | static struct attribute *bch_cache_files[] = { | |
874 | &sysfs_bucket_size, | |
875 | &sysfs_block_size, | |
876 | &sysfs_nbuckets, | |
877 | &sysfs_priority_stats, | |
878 | &sysfs_discard, | |
879 | &sysfs_written, | |
880 | &sysfs_btree_written, | |
881 | &sysfs_metadata_written, | |
882 | &sysfs_io_errors, | |
883 | &sysfs_clear_stats, | |
cafe5635 KO |
884 | &sysfs_cache_replacement_policy, |
885 | NULL | |
886 | }; | |
887 | KTYPE(bch_cache); |