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); | |
cafe5635 KO |
57 | |
58 | read_attribute(btree_nodes); | |
59 | read_attribute(btree_used_percent); | |
60 | read_attribute(average_key_size); | |
61 | read_attribute(dirty_data); | |
62 | read_attribute(bset_tree_stats); | |
63 | ||
64 | read_attribute(state); | |
65 | read_attribute(cache_read_races); | |
66 | read_attribute(writeback_keys_done); | |
67 | read_attribute(writeback_keys_failed); | |
68 | read_attribute(io_errors); | |
69 | read_attribute(congested); | |
70 | rw_attribute(congested_read_threshold_us); | |
71 | rw_attribute(congested_write_threshold_us); | |
72 | ||
73 | rw_attribute(sequential_cutoff); | |
cafe5635 KO |
74 | rw_attribute(data_csum); |
75 | rw_attribute(cache_mode); | |
76 | rw_attribute(writeback_metadata); | |
77 | rw_attribute(writeback_running); | |
78 | rw_attribute(writeback_percent); | |
79 | rw_attribute(writeback_delay); | |
80 | rw_attribute(writeback_rate); | |
81 | ||
82 | rw_attribute(writeback_rate_update_seconds); | |
83 | rw_attribute(writeback_rate_d_term); | |
84 | rw_attribute(writeback_rate_p_term_inverse); | |
cafe5635 KO |
85 | read_attribute(writeback_rate_debug); |
86 | ||
72c27061 KO |
87 | read_attribute(stripe_size); |
88 | read_attribute(partial_stripes_expensive); | |
89 | ||
cafe5635 KO |
90 | rw_attribute(synchronous); |
91 | rw_attribute(journal_delay_ms); | |
92 | rw_attribute(discard); | |
93 | rw_attribute(running); | |
94 | rw_attribute(label); | |
95 | rw_attribute(readahead); | |
77c320eb | 96 | rw_attribute(errors); |
cafe5635 KO |
97 | rw_attribute(io_error_limit); |
98 | rw_attribute(io_error_halflife); | |
99 | rw_attribute(verify); | |
5ceaaad7 | 100 | rw_attribute(bypass_torture_test); |
cafe5635 KO |
101 | rw_attribute(key_merging_disabled); |
102 | rw_attribute(gc_always_rewrite); | |
280481d0 | 103 | rw_attribute(expensive_debug_checks); |
cafe5635 KO |
104 | rw_attribute(cache_replacement_policy); |
105 | rw_attribute(btree_shrinker_disabled); | |
106 | rw_attribute(copy_gc_enabled); | |
107 | rw_attribute(size); | |
108 | ||
109 | SHOW(__bch_cached_dev) | |
110 | { | |
111 | struct cached_dev *dc = container_of(kobj, struct cached_dev, | |
112 | disk.kobj); | |
113 | const char *states[] = { "no cache", "clean", "dirty", "inconsistent" }; | |
114 | ||
115 | #define var(stat) (dc->stat) | |
116 | ||
117 | if (attr == &sysfs_cache_mode) | |
169ef1cf KO |
118 | return bch_snprint_string_list(buf, PAGE_SIZE, |
119 | bch_cache_modes + 1, | |
120 | BDEV_CACHE_MODE(&dc->sb)); | |
cafe5635 KO |
121 | |
122 | sysfs_printf(data_csum, "%i", dc->disk.data_csum); | |
123 | var_printf(verify, "%i"); | |
5ceaaad7 | 124 | var_printf(bypass_torture_test, "%i"); |
cafe5635 KO |
125 | var_printf(writeback_metadata, "%i"); |
126 | var_printf(writeback_running, "%i"); | |
127 | var_print(writeback_delay); | |
128 | var_print(writeback_percent); | |
16749c23 | 129 | sysfs_hprint(writeback_rate, dc->writeback_rate.rate << 9); |
cafe5635 KO |
130 | |
131 | var_print(writeback_rate_update_seconds); | |
132 | var_print(writeback_rate_d_term); | |
133 | var_print(writeback_rate_p_term_inverse); | |
cafe5635 KO |
134 | |
135 | if (attr == &sysfs_writeback_rate_debug) { | |
16749c23 | 136 | char rate[20]; |
cafe5635 | 137 | char dirty[20]; |
cafe5635 | 138 | char target[20]; |
16749c23 KO |
139 | char proportional[20]; |
140 | char derivative[20]; | |
141 | char change[20]; | |
142 | s64 next_io; | |
143 | ||
144 | bch_hprint(rate, dc->writeback_rate.rate << 9); | |
145 | bch_hprint(dirty, bcache_dev_sectors_dirty(&dc->disk) << 9); | |
169ef1cf | 146 | bch_hprint(target, dc->writeback_rate_target << 9); |
16749c23 KO |
147 | bch_hprint(proportional,dc->writeback_rate_proportional << 9); |
148 | bch_hprint(derivative, dc->writeback_rate_derivative << 9); | |
149 | bch_hprint(change, dc->writeback_rate_change << 9); | |
150 | ||
151 | next_io = div64_s64(dc->writeback_rate.next - local_clock(), | |
152 | NSEC_PER_MSEC); | |
cafe5635 KO |
153 | |
154 | return sprintf(buf, | |
16749c23 | 155 | "rate:\t\t%s/sec\n" |
cafe5635 | 156 | "dirty:\t\t%s\n" |
16749c23 KO |
157 | "target:\t\t%s\n" |
158 | "proportional:\t%s\n" | |
cafe5635 | 159 | "derivative:\t%s\n" |
16749c23 KO |
160 | "change:\t\t%s/sec\n" |
161 | "next io:\t%llims\n", | |
162 | rate, dirty, target, proportional, | |
163 | derivative, change, next_io); | |
cafe5635 KO |
164 | } |
165 | ||
166 | sysfs_hprint(dirty_data, | |
279afbad | 167 | bcache_dev_sectors_dirty(&dc->disk) << 9); |
cafe5635 | 168 | |
2d679fc7 | 169 | sysfs_hprint(stripe_size, dc->disk.stripe_size << 9); |
72c27061 KO |
170 | var_printf(partial_stripes_expensive, "%u"); |
171 | ||
cafe5635 KO |
172 | var_hprint(sequential_cutoff); |
173 | var_hprint(readahead); | |
174 | ||
175 | sysfs_print(running, atomic_read(&dc->running)); | |
176 | sysfs_print(state, states[BDEV_STATE(&dc->sb)]); | |
177 | ||
178 | if (attr == &sysfs_label) { | |
179 | memcpy(buf, dc->sb.label, SB_LABEL_SIZE); | |
180 | buf[SB_LABEL_SIZE + 1] = '\0'; | |
181 | strcat(buf, "\n"); | |
182 | return strlen(buf); | |
183 | } | |
184 | ||
185 | #undef var | |
186 | return 0; | |
187 | } | |
188 | SHOW_LOCKED(bch_cached_dev) | |
189 | ||
190 | STORE(__cached_dev) | |
191 | { | |
192 | struct cached_dev *dc = container_of(kobj, struct cached_dev, | |
193 | disk.kobj); | |
194 | unsigned v = size; | |
195 | struct cache_set *c; | |
ab9e1400 | 196 | struct kobj_uevent_env *env; |
cafe5635 KO |
197 | |
198 | #define d_strtoul(var) sysfs_strtoul(var, dc->var) | |
16749c23 | 199 | #define d_strtoul_nonzero(var) sysfs_strtoul_clamp(var, dc->var, 1, INT_MAX) |
cafe5635 KO |
200 | #define d_strtoi_h(var) sysfs_hatoi(var, dc->var) |
201 | ||
202 | sysfs_strtoul(data_csum, dc->disk.data_csum); | |
203 | d_strtoul(verify); | |
5ceaaad7 | 204 | d_strtoul(bypass_torture_test); |
cafe5635 KO |
205 | d_strtoul(writeback_metadata); |
206 | d_strtoul(writeback_running); | |
207 | d_strtoul(writeback_delay); | |
16749c23 | 208 | |
cafe5635 KO |
209 | sysfs_strtoul_clamp(writeback_percent, dc->writeback_percent, 0, 40); |
210 | ||
16749c23 KO |
211 | sysfs_strtoul_clamp(writeback_rate, |
212 | dc->writeback_rate.rate, 1, INT_MAX); | |
213 | ||
214 | d_strtoul_nonzero(writeback_rate_update_seconds); | |
cafe5635 | 215 | d_strtoul(writeback_rate_d_term); |
16749c23 | 216 | d_strtoul_nonzero(writeback_rate_p_term_inverse); |
cafe5635 | 217 | |
cafe5635 KO |
218 | d_strtoi_h(sequential_cutoff); |
219 | d_strtoi_h(readahead); | |
220 | ||
221 | if (attr == &sysfs_clear_stats) | |
222 | bch_cache_accounting_clear(&dc->accounting); | |
223 | ||
224 | if (attr == &sysfs_running && | |
225 | strtoul_or_return(buf)) | |
226 | bch_cached_dev_run(dc); | |
227 | ||
228 | if (attr == &sysfs_cache_mode) { | |
169ef1cf | 229 | ssize_t v = bch_read_string_list(buf, bch_cache_modes + 1); |
cafe5635 KO |
230 | |
231 | if (v < 0) | |
232 | return v; | |
233 | ||
234 | if ((unsigned) v != BDEV_CACHE_MODE(&dc->sb)) { | |
235 | SET_BDEV_CACHE_MODE(&dc->sb, v); | |
236 | bch_write_bdev_super(dc, NULL); | |
237 | } | |
238 | } | |
239 | ||
240 | if (attr == &sysfs_label) { | |
aee6f1cf GP |
241 | if (size > SB_LABEL_SIZE) |
242 | return -EINVAL; | |
243 | memcpy(dc->sb.label, buf, size); | |
244 | if (size < SB_LABEL_SIZE) | |
245 | dc->sb.label[size] = '\0'; | |
246 | if (size && dc->sb.label[size - 1] == '\n') | |
247 | dc->sb.label[size - 1] = '\0'; | |
cafe5635 KO |
248 | bch_write_bdev_super(dc, NULL); |
249 | if (dc->disk.c) { | |
250 | memcpy(dc->disk.c->uuids[dc->disk.id].label, | |
251 | buf, SB_LABEL_SIZE); | |
252 | bch_uuid_write(dc->disk.c); | |
253 | } | |
ab9e1400 | 254 | env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL); |
d2a65ce2 DC |
255 | if (!env) |
256 | return -ENOMEM; | |
ab9e1400 GP |
257 | add_uevent_var(env, "DRIVER=bcache"); |
258 | add_uevent_var(env, "CACHED_UUID=%pU", dc->sb.uuid), | |
259 | add_uevent_var(env, "CACHED_LABEL=%s", buf); | |
260 | kobject_uevent_env( | |
261 | &disk_to_dev(dc->disk.disk)->kobj, KOBJ_CHANGE, env->envp); | |
262 | kfree(env); | |
cafe5635 KO |
263 | } |
264 | ||
265 | if (attr == &sysfs_attach) { | |
169ef1cf | 266 | if (bch_parse_uuid(buf, dc->sb.set_uuid) < 16) |
cafe5635 KO |
267 | return -EINVAL; |
268 | ||
269 | list_for_each_entry(c, &bch_cache_sets, list) { | |
270 | v = bch_cached_dev_attach(dc, c); | |
271 | if (!v) | |
272 | return size; | |
273 | } | |
274 | ||
275 | pr_err("Can't attach %s: cache set not found", buf); | |
276 | size = v; | |
277 | } | |
278 | ||
279 | if (attr == &sysfs_detach && dc->disk.c) | |
280 | bch_cached_dev_detach(dc); | |
281 | ||
282 | if (attr == &sysfs_stop) | |
283 | bcache_device_stop(&dc->disk); | |
284 | ||
285 | return size; | |
286 | } | |
287 | ||
288 | STORE(bch_cached_dev) | |
289 | { | |
290 | struct cached_dev *dc = container_of(kobj, struct cached_dev, | |
291 | disk.kobj); | |
292 | ||
293 | mutex_lock(&bch_register_lock); | |
294 | size = __cached_dev_store(kobj, attr, buf, size); | |
295 | ||
296 | if (attr == &sysfs_writeback_running) | |
297 | bch_writeback_queue(dc); | |
298 | ||
299 | if (attr == &sysfs_writeback_percent) | |
300 | schedule_delayed_work(&dc->writeback_rate_update, | |
301 | dc->writeback_rate_update_seconds * HZ); | |
302 | ||
303 | mutex_unlock(&bch_register_lock); | |
304 | return size; | |
305 | } | |
306 | ||
307 | static struct attribute *bch_cached_dev_files[] = { | |
308 | &sysfs_attach, | |
309 | &sysfs_detach, | |
310 | &sysfs_stop, | |
311 | #if 0 | |
312 | &sysfs_data_csum, | |
313 | #endif | |
314 | &sysfs_cache_mode, | |
315 | &sysfs_writeback_metadata, | |
316 | &sysfs_writeback_running, | |
317 | &sysfs_writeback_delay, | |
318 | &sysfs_writeback_percent, | |
319 | &sysfs_writeback_rate, | |
320 | &sysfs_writeback_rate_update_seconds, | |
321 | &sysfs_writeback_rate_d_term, | |
322 | &sysfs_writeback_rate_p_term_inverse, | |
cafe5635 KO |
323 | &sysfs_writeback_rate_debug, |
324 | &sysfs_dirty_data, | |
72c27061 KO |
325 | &sysfs_stripe_size, |
326 | &sysfs_partial_stripes_expensive, | |
cafe5635 | 327 | &sysfs_sequential_cutoff, |
cafe5635 KO |
328 | &sysfs_clear_stats, |
329 | &sysfs_running, | |
330 | &sysfs_state, | |
331 | &sysfs_label, | |
332 | &sysfs_readahead, | |
333 | #ifdef CONFIG_BCACHE_DEBUG | |
334 | &sysfs_verify, | |
5ceaaad7 | 335 | &sysfs_bypass_torture_test, |
cafe5635 KO |
336 | #endif |
337 | NULL | |
338 | }; | |
339 | KTYPE(bch_cached_dev); | |
340 | ||
341 | SHOW(bch_flash_dev) | |
342 | { | |
343 | struct bcache_device *d = container_of(kobj, struct bcache_device, | |
344 | kobj); | |
345 | struct uuid_entry *u = &d->c->uuids[d->id]; | |
346 | ||
347 | sysfs_printf(data_csum, "%i", d->data_csum); | |
348 | sysfs_hprint(size, u->sectors << 9); | |
349 | ||
350 | if (attr == &sysfs_label) { | |
351 | memcpy(buf, u->label, SB_LABEL_SIZE); | |
352 | buf[SB_LABEL_SIZE + 1] = '\0'; | |
353 | strcat(buf, "\n"); | |
354 | return strlen(buf); | |
355 | } | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | STORE(__bch_flash_dev) | |
361 | { | |
362 | struct bcache_device *d = container_of(kobj, struct bcache_device, | |
363 | kobj); | |
364 | struct uuid_entry *u = &d->c->uuids[d->id]; | |
365 | ||
366 | sysfs_strtoul(data_csum, d->data_csum); | |
367 | ||
368 | if (attr == &sysfs_size) { | |
369 | uint64_t v; | |
370 | strtoi_h_or_return(buf, v); | |
371 | ||
372 | u->sectors = v >> 9; | |
373 | bch_uuid_write(d->c); | |
374 | set_capacity(d->disk, u->sectors); | |
375 | } | |
376 | ||
377 | if (attr == &sysfs_label) { | |
378 | memcpy(u->label, buf, SB_LABEL_SIZE); | |
379 | bch_uuid_write(d->c); | |
380 | } | |
381 | ||
382 | if (attr == &sysfs_unregister) { | |
c4d951dd | 383 | set_bit(BCACHE_DEV_DETACHING, &d->flags); |
cafe5635 KO |
384 | bcache_device_stop(d); |
385 | } | |
386 | ||
387 | return size; | |
388 | } | |
389 | STORE_LOCKED(bch_flash_dev) | |
390 | ||
391 | static struct attribute *bch_flash_dev_files[] = { | |
392 | &sysfs_unregister, | |
393 | #if 0 | |
394 | &sysfs_data_csum, | |
395 | #endif | |
396 | &sysfs_label, | |
397 | &sysfs_size, | |
398 | NULL | |
399 | }; | |
400 | KTYPE(bch_flash_dev); | |
401 | ||
f67342dd KO |
402 | struct bset_stats_op { |
403 | struct btree_op op; | |
404 | size_t nodes; | |
405 | struct bset_stats stats; | |
406 | }; | |
407 | ||
cb851149 | 408 | static int bch_btree_bset_stats(struct btree_op *b_op, struct btree *b) |
f67342dd KO |
409 | { |
410 | struct bset_stats_op *op = container_of(b_op, struct bset_stats_op, op); | |
411 | ||
412 | op->nodes++; | |
413 | bch_btree_keys_stats(&b->keys, &op->stats); | |
414 | ||
415 | return MAP_CONTINUE; | |
416 | } | |
417 | ||
3572324a | 418 | static int bch_bset_print_stats(struct cache_set *c, char *buf) |
f67342dd KO |
419 | { |
420 | struct bset_stats_op op; | |
421 | int ret; | |
422 | ||
423 | memset(&op, 0, sizeof(op)); | |
424 | bch_btree_op_init(&op.op, -1); | |
425 | ||
cb851149 | 426 | ret = bch_btree_map_nodes(&op.op, c, &ZERO_KEY, bch_btree_bset_stats); |
f67342dd KO |
427 | if (ret < 0) |
428 | return ret; | |
429 | ||
430 | return snprintf(buf, PAGE_SIZE, | |
431 | "btree nodes: %zu\n" | |
432 | "written sets: %zu\n" | |
433 | "unwritten sets: %zu\n" | |
434 | "written key bytes: %zu\n" | |
435 | "unwritten key bytes: %zu\n" | |
436 | "floats: %zu\n" | |
437 | "failed: %zu\n", | |
438 | op.nodes, | |
439 | op.stats.sets_written, op.stats.sets_unwritten, | |
440 | op.stats.bytes_written, op.stats.bytes_unwritten, | |
441 | op.stats.floats, op.stats.failed); | |
442 | } | |
443 | ||
cb851149 | 444 | static unsigned bch_root_usage(struct cache_set *c) |
cafe5635 | 445 | { |
cb851149 JS |
446 | unsigned bytes = 0; |
447 | struct bkey *k; | |
448 | struct btree *b; | |
449 | struct btree_iter iter; | |
cafe5635 | 450 | |
cb851149 | 451 | goto lock_root; |
cafe5635 | 452 | |
cb851149 JS |
453 | do { |
454 | rw_unlock(false, b); | |
cafe5635 | 455 | lock_root: |
cb851149 JS |
456 | b = c->root; |
457 | rw_lock(false, b, b->level); | |
458 | } while (b != c->root); | |
cafe5635 | 459 | |
cb851149 JS |
460 | for_each_key_filter(&b->keys, k, &iter, bch_ptr_bad) |
461 | bytes += bkey_bytes(k); | |
cafe5635 | 462 | |
cb851149 | 463 | rw_unlock(false, b); |
cafe5635 | 464 | |
cb851149 JS |
465 | return (bytes * 100) / btree_bytes(c); |
466 | } | |
cafe5635 | 467 | |
cb851149 JS |
468 | static size_t bch_cache_size(struct cache_set *c) |
469 | { | |
470 | size_t ret = 0; | |
471 | struct btree *b; | |
cafe5635 | 472 | |
cb851149 JS |
473 | mutex_lock(&c->bucket_lock); |
474 | list_for_each_entry(b, &c->btree_cache, list) | |
475 | ret += 1 << (b->keys.page_order + PAGE_SHIFT); | |
cafe5635 | 476 | |
cb851149 JS |
477 | mutex_unlock(&c->bucket_lock); |
478 | return ret; | |
479 | } | |
cafe5635 | 480 | |
cb851149 JS |
481 | static unsigned bch_cache_max_chain(struct cache_set *c) |
482 | { | |
483 | unsigned ret = 0; | |
484 | struct hlist_head *h; | |
cafe5635 | 485 | |
cb851149 | 486 | mutex_lock(&c->bucket_lock); |
cafe5635 | 487 | |
cb851149 JS |
488 | for (h = c->bucket_hash; |
489 | h < c->bucket_hash + (1 << BUCKET_HASH_BITS); | |
490 | h++) { | |
491 | unsigned i = 0; | |
492 | struct hlist_node *p; | |
cafe5635 | 493 | |
cb851149 JS |
494 | hlist_for_each(p, h) |
495 | i++; | |
cafe5635 | 496 | |
cb851149 | 497 | ret = max(ret, i); |
cafe5635 KO |
498 | } |
499 | ||
cb851149 JS |
500 | mutex_unlock(&c->bucket_lock); |
501 | return ret; | |
502 | } | |
cafe5635 | 503 | |
cb851149 JS |
504 | static unsigned bch_btree_used(struct cache_set *c) |
505 | { | |
506 | return div64_u64(c->gc_stats.key_bytes * 100, | |
507 | (c->gc_stats.nodes ?: 1) * btree_bytes(c)); | |
508 | } | |
cafe5635 | 509 | |
cb851149 JS |
510 | static unsigned bch_average_key_size(struct cache_set *c) |
511 | { | |
512 | return c->gc_stats.nkeys | |
513 | ? div64_u64(c->gc_stats.data, c->gc_stats.nkeys) | |
514 | : 0; | |
515 | } | |
516 | ||
517 | SHOW(__bch_cache_set) | |
518 | { | |
cafe5635 KO |
519 | struct cache_set *c = container_of(kobj, struct cache_set, kobj); |
520 | ||
521 | sysfs_print(synchronous, CACHE_SYNC(&c->sb)); | |
522 | sysfs_print(journal_delay_ms, c->journal_delay_ms); | |
523 | sysfs_hprint(bucket_size, bucket_bytes(c)); | |
524 | sysfs_hprint(block_size, block_bytes(c)); | |
525 | sysfs_print(tree_depth, c->root->level); | |
cb851149 | 526 | sysfs_print(root_usage_percent, bch_root_usage(c)); |
cafe5635 | 527 | |
cb851149 JS |
528 | sysfs_hprint(btree_cache_size, bch_cache_size(c)); |
529 | sysfs_print(btree_cache_max_chain, bch_cache_max_chain(c)); | |
cafe5635 KO |
530 | sysfs_print(cache_available_percent, 100 - c->gc_stats.in_use); |
531 | ||
532 | sysfs_print_time_stats(&c->btree_gc_time, btree_gc, sec, ms); | |
533 | sysfs_print_time_stats(&c->btree_split_time, btree_split, sec, us); | |
67539e85 | 534 | sysfs_print_time_stats(&c->sort.time, btree_sort, ms, us); |
cafe5635 | 535 | sysfs_print_time_stats(&c->btree_read_time, btree_read, ms, us); |
cafe5635 | 536 | |
cb851149 | 537 | sysfs_print(btree_used_percent, bch_btree_used(c)); |
cafe5635 | 538 | sysfs_print(btree_nodes, c->gc_stats.nodes); |
cb851149 | 539 | sysfs_hprint(average_key_size, bch_average_key_size(c)); |
cafe5635 KO |
540 | |
541 | sysfs_print(cache_read_races, | |
542 | atomic_long_read(&c->cache_read_races)); | |
543 | ||
544 | sysfs_print(writeback_keys_done, | |
545 | atomic_long_read(&c->writeback_keys_done)); | |
546 | sysfs_print(writeback_keys_failed, | |
547 | atomic_long_read(&c->writeback_keys_failed)); | |
548 | ||
77c320eb KO |
549 | if (attr == &sysfs_errors) |
550 | return bch_snprint_string_list(buf, PAGE_SIZE, error_actions, | |
551 | c->on_error); | |
552 | ||
cafe5635 KO |
553 | /* See count_io_errors for why 88 */ |
554 | sysfs_print(io_error_halflife, c->error_decay * 88); | |
555 | sysfs_print(io_error_limit, c->error_limit >> IO_ERROR_SHIFT); | |
556 | ||
557 | sysfs_hprint(congested, | |
558 | ((uint64_t) bch_get_congested(c)) << 9); | |
559 | sysfs_print(congested_read_threshold_us, | |
560 | c->congested_read_threshold_us); | |
561 | sysfs_print(congested_write_threshold_us, | |
562 | c->congested_write_threshold_us); | |
563 | ||
564 | sysfs_print(active_journal_entries, fifo_used(&c->journal.pin)); | |
565 | sysfs_printf(verify, "%i", c->verify); | |
566 | sysfs_printf(key_merging_disabled, "%i", c->key_merging_disabled); | |
280481d0 KO |
567 | sysfs_printf(expensive_debug_checks, |
568 | "%i", c->expensive_debug_checks); | |
cafe5635 KO |
569 | sysfs_printf(gc_always_rewrite, "%i", c->gc_always_rewrite); |
570 | sysfs_printf(btree_shrinker_disabled, "%i", c->shrinker_disabled); | |
571 | sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled); | |
572 | ||
573 | if (attr == &sysfs_bset_tree_stats) | |
574 | return bch_bset_print_stats(c, buf); | |
575 | ||
576 | return 0; | |
577 | } | |
578 | SHOW_LOCKED(bch_cache_set) | |
579 | ||
580 | STORE(__bch_cache_set) | |
581 | { | |
582 | struct cache_set *c = container_of(kobj, struct cache_set, kobj); | |
583 | ||
584 | if (attr == &sysfs_unregister) | |
585 | bch_cache_set_unregister(c); | |
586 | ||
587 | if (attr == &sysfs_stop) | |
588 | bch_cache_set_stop(c); | |
589 | ||
590 | if (attr == &sysfs_synchronous) { | |
591 | bool sync = strtoul_or_return(buf); | |
592 | ||
593 | if (sync != CACHE_SYNC(&c->sb)) { | |
594 | SET_CACHE_SYNC(&c->sb, sync); | |
595 | bcache_write_super(c); | |
596 | } | |
597 | } | |
598 | ||
599 | if (attr == &sysfs_flash_vol_create) { | |
600 | int r; | |
601 | uint64_t v; | |
602 | strtoi_h_or_return(buf, v); | |
603 | ||
604 | r = bch_flash_dev_create(c, v); | |
605 | if (r) | |
606 | return r; | |
607 | } | |
608 | ||
609 | if (attr == &sysfs_clear_stats) { | |
610 | atomic_long_set(&c->writeback_keys_done, 0); | |
611 | atomic_long_set(&c->writeback_keys_failed, 0); | |
612 | ||
613 | memset(&c->gc_stats, 0, sizeof(struct gc_stat)); | |
614 | bch_cache_accounting_clear(&c->accounting); | |
615 | } | |
616 | ||
617 | if (attr == &sysfs_trigger_gc) | |
72a44517 | 618 | wake_up_gc(c); |
cafe5635 KO |
619 | |
620 | if (attr == &sysfs_prune_cache) { | |
621 | struct shrink_control sc; | |
622 | sc.gfp_mask = GFP_KERNEL; | |
623 | sc.nr_to_scan = strtoul_or_return(buf); | |
7dc19d5a | 624 | c->shrink.scan_objects(&c->shrink, &sc); |
cafe5635 KO |
625 | } |
626 | ||
627 | sysfs_strtoul(congested_read_threshold_us, | |
628 | c->congested_read_threshold_us); | |
629 | sysfs_strtoul(congested_write_threshold_us, | |
630 | c->congested_write_threshold_us); | |
631 | ||
77c320eb KO |
632 | if (attr == &sysfs_errors) { |
633 | ssize_t v = bch_read_string_list(buf, error_actions); | |
634 | ||
635 | if (v < 0) | |
636 | return v; | |
637 | ||
638 | c->on_error = v; | |
639 | } | |
640 | ||
cafe5635 KO |
641 | if (attr == &sysfs_io_error_limit) |
642 | c->error_limit = strtoul_or_return(buf) << IO_ERROR_SHIFT; | |
643 | ||
644 | /* See count_io_errors() for why 88 */ | |
645 | if (attr == &sysfs_io_error_halflife) | |
646 | c->error_decay = strtoul_or_return(buf) / 88; | |
647 | ||
648 | sysfs_strtoul(journal_delay_ms, c->journal_delay_ms); | |
649 | sysfs_strtoul(verify, c->verify); | |
650 | sysfs_strtoul(key_merging_disabled, c->key_merging_disabled); | |
280481d0 | 651 | sysfs_strtoul(expensive_debug_checks, c->expensive_debug_checks); |
cafe5635 KO |
652 | sysfs_strtoul(gc_always_rewrite, c->gc_always_rewrite); |
653 | sysfs_strtoul(btree_shrinker_disabled, c->shrinker_disabled); | |
654 | sysfs_strtoul(copy_gc_enabled, c->copy_gc_enabled); | |
655 | ||
656 | return size; | |
657 | } | |
658 | STORE_LOCKED(bch_cache_set) | |
659 | ||
660 | SHOW(bch_cache_set_internal) | |
661 | { | |
662 | struct cache_set *c = container_of(kobj, struct cache_set, internal); | |
663 | return bch_cache_set_show(&c->kobj, attr, buf); | |
664 | } | |
665 | ||
666 | STORE(bch_cache_set_internal) | |
667 | { | |
668 | struct cache_set *c = container_of(kobj, struct cache_set, internal); | |
669 | return bch_cache_set_store(&c->kobj, attr, buf, size); | |
670 | } | |
671 | ||
672 | static void bch_cache_set_internal_release(struct kobject *k) | |
673 | { | |
674 | } | |
675 | ||
676 | static struct attribute *bch_cache_set_files[] = { | |
677 | &sysfs_unregister, | |
678 | &sysfs_stop, | |
679 | &sysfs_synchronous, | |
680 | &sysfs_journal_delay_ms, | |
681 | &sysfs_flash_vol_create, | |
682 | ||
683 | &sysfs_bucket_size, | |
684 | &sysfs_block_size, | |
685 | &sysfs_tree_depth, | |
686 | &sysfs_root_usage_percent, | |
687 | &sysfs_btree_cache_size, | |
688 | &sysfs_cache_available_percent, | |
689 | ||
690 | &sysfs_average_key_size, | |
cafe5635 | 691 | |
77c320eb | 692 | &sysfs_errors, |
cafe5635 KO |
693 | &sysfs_io_error_limit, |
694 | &sysfs_io_error_halflife, | |
695 | &sysfs_congested, | |
696 | &sysfs_congested_read_threshold_us, | |
697 | &sysfs_congested_write_threshold_us, | |
698 | &sysfs_clear_stats, | |
699 | NULL | |
700 | }; | |
701 | KTYPE(bch_cache_set); | |
702 | ||
703 | static struct attribute *bch_cache_set_internal_files[] = { | |
704 | &sysfs_active_journal_entries, | |
705 | ||
706 | sysfs_time_stats_attribute_list(btree_gc, sec, ms) | |
707 | sysfs_time_stats_attribute_list(btree_split, sec, us) | |
708 | sysfs_time_stats_attribute_list(btree_sort, ms, us) | |
709 | sysfs_time_stats_attribute_list(btree_read, ms, us) | |
cafe5635 KO |
710 | |
711 | &sysfs_btree_nodes, | |
712 | &sysfs_btree_used_percent, | |
713 | &sysfs_btree_cache_max_chain, | |
714 | ||
715 | &sysfs_bset_tree_stats, | |
716 | &sysfs_cache_read_races, | |
717 | &sysfs_writeback_keys_done, | |
718 | &sysfs_writeback_keys_failed, | |
719 | ||
720 | &sysfs_trigger_gc, | |
721 | &sysfs_prune_cache, | |
722 | #ifdef CONFIG_BCACHE_DEBUG | |
723 | &sysfs_verify, | |
724 | &sysfs_key_merging_disabled, | |
280481d0 | 725 | &sysfs_expensive_debug_checks, |
cafe5635 KO |
726 | #endif |
727 | &sysfs_gc_always_rewrite, | |
728 | &sysfs_btree_shrinker_disabled, | |
729 | &sysfs_copy_gc_enabled, | |
730 | NULL | |
731 | }; | |
732 | KTYPE(bch_cache_set_internal); | |
733 | ||
734 | SHOW(__bch_cache) | |
735 | { | |
736 | struct cache *ca = container_of(kobj, struct cache, kobj); | |
737 | ||
738 | sysfs_hprint(bucket_size, bucket_bytes(ca)); | |
739 | sysfs_hprint(block_size, block_bytes(ca)); | |
740 | sysfs_print(nbuckets, ca->sb.nbuckets); | |
741 | sysfs_print(discard, ca->discard); | |
742 | sysfs_hprint(written, atomic_long_read(&ca->sectors_written) << 9); | |
743 | sysfs_hprint(btree_written, | |
744 | atomic_long_read(&ca->btree_sectors_written) << 9); | |
745 | sysfs_hprint(metadata_written, | |
746 | (atomic_long_read(&ca->meta_sectors_written) + | |
747 | atomic_long_read(&ca->btree_sectors_written)) << 9); | |
748 | ||
749 | sysfs_print(io_errors, | |
750 | atomic_read(&ca->io_errors) >> IO_ERROR_SHIFT); | |
751 | ||
cafe5635 | 752 | if (attr == &sysfs_cache_replacement_policy) |
169ef1cf KO |
753 | return bch_snprint_string_list(buf, PAGE_SIZE, |
754 | cache_replacement_policies, | |
755 | CACHE_REPLACEMENT(&ca->sb)); | |
cafe5635 KO |
756 | |
757 | if (attr == &sysfs_priority_stats) { | |
758 | int cmp(const void *l, const void *r) | |
759 | { return *((uint16_t *) r) - *((uint16_t *) l); } | |
760 | ||
15754020 KO |
761 | struct bucket *b; |
762 | size_t n = ca->sb.nbuckets, i; | |
763 | size_t unused = 0, available = 0, dirty = 0, meta = 0; | |
cafe5635 | 764 | uint64_t sum = 0; |
bbc77aa7 KO |
765 | /* Compute 31 quantiles */ |
766 | uint16_t q[31], *p, *cached; | |
cafe5635 KO |
767 | ssize_t ret; |
768 | ||
769 | cached = p = vmalloc(ca->sb.nbuckets * sizeof(uint16_t)); | |
770 | if (!p) | |
771 | return -ENOMEM; | |
772 | ||
773 | mutex_lock(&ca->set->bucket_lock); | |
15754020 KO |
774 | for_each_bucket(b, ca) { |
775 | if (!GC_SECTORS_USED(b)) | |
776 | unused++; | |
777 | if (GC_MARK(b) == GC_MARK_RECLAIMABLE) | |
778 | available++; | |
779 | if (GC_MARK(b) == GC_MARK_DIRTY) | |
780 | dirty++; | |
781 | if (GC_MARK(b) == GC_MARK_METADATA) | |
782 | meta++; | |
783 | } | |
784 | ||
cafe5635 KO |
785 | for (i = ca->sb.first_bucket; i < n; i++) |
786 | p[i] = ca->buckets[i].prio; | |
787 | mutex_unlock(&ca->set->bucket_lock); | |
788 | ||
789 | sort(p, n, sizeof(uint16_t), cmp, NULL); | |
790 | ||
791 | while (n && | |
792 | !cached[n - 1]) | |
793 | --n; | |
794 | ||
795 | unused = ca->sb.nbuckets - n; | |
796 | ||
797 | while (cached < p + n && | |
798 | *cached == BTREE_PRIO) | |
15754020 | 799 | cached++, n--; |
cafe5635 KO |
800 | |
801 | for (i = 0; i < n; i++) | |
802 | sum += INITIAL_PRIO - cached[i]; | |
803 | ||
804 | if (n) | |
805 | do_div(sum, n); | |
806 | ||
bbc77aa7 KO |
807 | for (i = 0; i < ARRAY_SIZE(q); i++) |
808 | q[i] = INITIAL_PRIO - cached[n * (i + 1) / | |
809 | (ARRAY_SIZE(q) + 1)]; | |
cafe5635 KO |
810 | |
811 | vfree(p); | |
812 | ||
bbc77aa7 KO |
813 | ret = scnprintf(buf, PAGE_SIZE, |
814 | "Unused: %zu%%\n" | |
15754020 KO |
815 | "Clean: %zu%%\n" |
816 | "Dirty: %zu%%\n" | |
bbc77aa7 KO |
817 | "Metadata: %zu%%\n" |
818 | "Average: %llu\n" | |
819 | "Sectors per Q: %zu\n" | |
820 | "Quantiles: [", | |
821 | unused * 100 / (size_t) ca->sb.nbuckets, | |
15754020 KO |
822 | available * 100 / (size_t) ca->sb.nbuckets, |
823 | dirty * 100 / (size_t) ca->sb.nbuckets, | |
824 | meta * 100 / (size_t) ca->sb.nbuckets, sum, | |
bbc77aa7 KO |
825 | n * ca->sb.bucket_size / (ARRAY_SIZE(q) + 1)); |
826 | ||
827 | for (i = 0; i < ARRAY_SIZE(q); i++) | |
828 | ret += scnprintf(buf + ret, PAGE_SIZE - ret, | |
829 | "%u ", q[i]); | |
830 | ret--; | |
831 | ||
832 | ret += scnprintf(buf + ret, PAGE_SIZE - ret, "]\n"); | |
833 | ||
cafe5635 KO |
834 | return ret; |
835 | } | |
836 | ||
837 | return 0; | |
838 | } | |
839 | SHOW_LOCKED(bch_cache) | |
840 | ||
841 | STORE(__bch_cache) | |
842 | { | |
843 | struct cache *ca = container_of(kobj, struct cache, kobj); | |
844 | ||
845 | if (attr == &sysfs_discard) { | |
846 | bool v = strtoul_or_return(buf); | |
847 | ||
848 | if (blk_queue_discard(bdev_get_queue(ca->bdev))) | |
849 | ca->discard = v; | |
850 | ||
851 | if (v != CACHE_DISCARD(&ca->sb)) { | |
852 | SET_CACHE_DISCARD(&ca->sb, v); | |
853 | bcache_write_super(ca->set); | |
854 | } | |
855 | } | |
856 | ||
857 | if (attr == &sysfs_cache_replacement_policy) { | |
169ef1cf | 858 | ssize_t v = bch_read_string_list(buf, cache_replacement_policies); |
cafe5635 KO |
859 | |
860 | if (v < 0) | |
861 | return v; | |
862 | ||
863 | if ((unsigned) v != CACHE_REPLACEMENT(&ca->sb)) { | |
864 | mutex_lock(&ca->set->bucket_lock); | |
865 | SET_CACHE_REPLACEMENT(&ca->sb, v); | |
866 | mutex_unlock(&ca->set->bucket_lock); | |
867 | ||
868 | bcache_write_super(ca->set); | |
869 | } | |
870 | } | |
871 | ||
cafe5635 KO |
872 | if (attr == &sysfs_clear_stats) { |
873 | atomic_long_set(&ca->sectors_written, 0); | |
874 | atomic_long_set(&ca->btree_sectors_written, 0); | |
875 | atomic_long_set(&ca->meta_sectors_written, 0); | |
876 | atomic_set(&ca->io_count, 0); | |
877 | atomic_set(&ca->io_errors, 0); | |
878 | } | |
879 | ||
880 | return size; | |
881 | } | |
882 | STORE_LOCKED(bch_cache) | |
883 | ||
884 | static struct attribute *bch_cache_files[] = { | |
885 | &sysfs_bucket_size, | |
886 | &sysfs_block_size, | |
887 | &sysfs_nbuckets, | |
888 | &sysfs_priority_stats, | |
889 | &sysfs_discard, | |
890 | &sysfs_written, | |
891 | &sysfs_btree_written, | |
892 | &sysfs_metadata_written, | |
893 | &sysfs_io_errors, | |
894 | &sysfs_clear_stats, | |
cafe5635 KO |
895 | &sysfs_cache_replacement_policy, |
896 | NULL | |
897 | }; | |
898 | KTYPE(bch_cache); |