Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
cafe5635 KO |
2 | /* |
3 | * bcache sysfs interfaces | |
4 | * | |
5 | * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com> | |
6 | * Copyright 2012 Google, Inc. | |
7 | */ | |
8 | ||
9 | #include "bcache.h" | |
10 | #include "sysfs.h" | |
11 | #include "btree.h" | |
12 | #include "request.h" | |
279afbad | 13 | #include "writeback.h" |
092bd54d | 14 | #include "features.h" |
cafe5635 | 15 | |
c37511b8 | 16 | #include <linux/blkdev.h> |
cafe5635 | 17 | #include <linux/sort.h> |
e6017571 | 18 | #include <linux/sched/clock.h> |
cafe5635 | 19 | |
a59ff6cc CL |
20 | extern bool bcache_is_reboot; |
21 | ||
4e361e02 | 22 | /* Default is 0 ("writethrough") */ |
04cbc211 | 23 | static const char * const bch_cache_modes[] = { |
04cbc211 AS |
24 | "writethrough", |
25 | "writeback", | |
26 | "writearound", | |
20621fed CL |
27 | "none", |
28 | NULL | |
04cbc211 AS |
29 | }; |
30 | ||
038ba8cc CL |
31 | static const char * const bch_reada_cache_policies[] = { |
32 | "all", | |
33 | "meta-only", | |
34 | NULL | |
35 | }; | |
36 | ||
4e361e02 | 37 | /* Default is 0 ("auto") */ |
04cbc211 | 38 | static const char * const bch_stop_on_failure_modes[] = { |
04cbc211 | 39 | "auto", |
20621fed CL |
40 | "always", |
41 | NULL | |
04cbc211 AS |
42 | }; |
43 | ||
cafe5635 KO |
44 | static const char * const cache_replacement_policies[] = { |
45 | "lru", | |
46 | "fifo", | |
20621fed CL |
47 | "random", |
48 | NULL | |
cafe5635 KO |
49 | }; |
50 | ||
77c320eb KO |
51 | static const char * const error_actions[] = { |
52 | "unregister", | |
20621fed CL |
53 | "panic", |
54 | NULL | |
77c320eb KO |
55 | }; |
56 | ||
cafe5635 KO |
57 | write_attribute(attach); |
58 | write_attribute(detach); | |
59 | write_attribute(unregister); | |
60 | write_attribute(stop); | |
61 | write_attribute(clear_stats); | |
62 | write_attribute(trigger_gc); | |
63 | write_attribute(prune_cache); | |
64 | write_attribute(flash_vol_create); | |
65 | ||
66 | read_attribute(bucket_size); | |
67 | read_attribute(block_size); | |
68 | read_attribute(nbuckets); | |
69 | read_attribute(tree_depth); | |
70 | read_attribute(root_usage_percent); | |
71 | read_attribute(priority_stats); | |
72 | read_attribute(btree_cache_size); | |
73 | read_attribute(btree_cache_max_chain); | |
74 | read_attribute(cache_available_percent); | |
75 | read_attribute(written); | |
76 | read_attribute(btree_written); | |
77 | read_attribute(metadata_written); | |
78 | read_attribute(active_journal_entries); | |
926d1946 | 79 | read_attribute(backing_dev_name); |
d4610456 | 80 | read_attribute(backing_dev_uuid); |
cafe5635 KO |
81 | |
82 | sysfs_time_stats_attribute(btree_gc, sec, ms); | |
83 | sysfs_time_stats_attribute(btree_split, sec, us); | |
84 | sysfs_time_stats_attribute(btree_sort, ms, us); | |
85 | sysfs_time_stats_attribute(btree_read, ms, us); | |
cafe5635 KO |
86 | |
87 | read_attribute(btree_nodes); | |
88 | read_attribute(btree_used_percent); | |
89 | read_attribute(average_key_size); | |
90 | read_attribute(dirty_data); | |
91 | read_attribute(bset_tree_stats); | |
092bd54d CL |
92 | read_attribute(feature_compat); |
93 | read_attribute(feature_ro_compat); | |
94 | read_attribute(feature_incompat); | |
cafe5635 KO |
95 | |
96 | read_attribute(state); | |
97 | read_attribute(cache_read_races); | |
a728eacb | 98 | read_attribute(reclaim); |
dff90d58 | 99 | read_attribute(reclaimed_journal_buckets); |
a728eacb | 100 | read_attribute(flush_write); |
cafe5635 KO |
101 | read_attribute(writeback_keys_done); |
102 | read_attribute(writeback_keys_failed); | |
103 | read_attribute(io_errors); | |
104 | read_attribute(congested); | |
9aaf5165 CL |
105 | read_attribute(cutoff_writeback); |
106 | read_attribute(cutoff_writeback_sync); | |
cafe5635 KO |
107 | rw_attribute(congested_read_threshold_us); |
108 | rw_attribute(congested_write_threshold_us); | |
109 | ||
110 | rw_attribute(sequential_cutoff); | |
cafe5635 KO |
111 | rw_attribute(data_csum); |
112 | rw_attribute(cache_mode); | |
038ba8cc | 113 | rw_attribute(readahead_cache_policy); |
7e027ca4 | 114 | rw_attribute(stop_when_cache_set_failed); |
cafe5635 KO |
115 | rw_attribute(writeback_metadata); |
116 | rw_attribute(writeback_running); | |
117 | rw_attribute(writeback_percent); | |
118 | rw_attribute(writeback_delay); | |
119 | rw_attribute(writeback_rate); | |
71dda2a5 | 120 | rw_attribute(writeback_consider_fragment); |
cafe5635 KO |
121 | |
122 | rw_attribute(writeback_rate_update_seconds); | |
1d316e65 | 123 | rw_attribute(writeback_rate_i_term_inverse); |
cafe5635 | 124 | rw_attribute(writeback_rate_p_term_inverse); |
71dda2a5 | 125 | rw_attribute(writeback_rate_fp_term_low); |
126 | rw_attribute(writeback_rate_fp_term_mid); | |
127 | rw_attribute(writeback_rate_fp_term_high); | |
1d316e65 | 128 | rw_attribute(writeback_rate_minimum); |
cafe5635 KO |
129 | read_attribute(writeback_rate_debug); |
130 | ||
72c27061 KO |
131 | read_attribute(stripe_size); |
132 | read_attribute(partial_stripes_expensive); | |
133 | ||
cafe5635 KO |
134 | rw_attribute(synchronous); |
135 | rw_attribute(journal_delay_ms); | |
771f393e | 136 | rw_attribute(io_disable); |
cafe5635 KO |
137 | rw_attribute(discard); |
138 | rw_attribute(running); | |
139 | rw_attribute(label); | |
77c320eb | 140 | rw_attribute(errors); |
cafe5635 KO |
141 | rw_attribute(io_error_limit); |
142 | rw_attribute(io_error_halflife); | |
143 | rw_attribute(verify); | |
5ceaaad7 | 144 | rw_attribute(bypass_torture_test); |
cafe5635 KO |
145 | rw_attribute(key_merging_disabled); |
146 | rw_attribute(gc_always_rewrite); | |
280481d0 | 147 | rw_attribute(expensive_debug_checks); |
cafe5635 KO |
148 | rw_attribute(cache_replacement_policy); |
149 | rw_attribute(btree_shrinker_disabled); | |
150 | rw_attribute(copy_gc_enabled); | |
c5fcdedc | 151 | rw_attribute(idle_max_writeback_rate); |
7a671d8e | 152 | rw_attribute(gc_after_writeback); |
cafe5635 KO |
153 | rw_attribute(size); |
154 | ||
b0d30981 CL |
155 | static ssize_t bch_snprint_string_list(char *buf, |
156 | size_t size, | |
157 | const char * const list[], | |
158 | size_t selected) | |
ecb37ce9 AS |
159 | { |
160 | char *out = buf; | |
161 | size_t i; | |
162 | ||
163 | for (i = 0; list[i]; i++) | |
9876e386 | 164 | out += scnprintf(out, buf + size - out, |
ecb37ce9 AS |
165 | i == selected ? "[%s] " : "%s ", list[i]); |
166 | ||
167 | out[-1] = '\n'; | |
168 | return out - buf; | |
169 | } | |
170 | ||
cafe5635 KO |
171 | SHOW(__bch_cached_dev) |
172 | { | |
173 | struct cached_dev *dc = container_of(kobj, struct cached_dev, | |
174 | disk.kobj); | |
e1f08f1b | 175 | char const *states[] = { "no cache", "clean", "dirty", "inconsistent" }; |
b4cb6efc | 176 | int wb = dc->writeback_running; |
cafe5635 KO |
177 | |
178 | #define var(stat) (dc->stat) | |
179 | ||
180 | if (attr == &sysfs_cache_mode) | |
169ef1cf | 181 | return bch_snprint_string_list(buf, PAGE_SIZE, |
ce4c3e19 | 182 | bch_cache_modes, |
169ef1cf | 183 | BDEV_CACHE_MODE(&dc->sb)); |
cafe5635 | 184 | |
038ba8cc CL |
185 | if (attr == &sysfs_readahead_cache_policy) |
186 | return bch_snprint_string_list(buf, PAGE_SIZE, | |
187 | bch_reada_cache_policies, | |
188 | dc->cache_readahead_policy); | |
189 | ||
7e027ca4 CL |
190 | if (attr == &sysfs_stop_when_cache_set_failed) |
191 | return bch_snprint_string_list(buf, PAGE_SIZE, | |
ce4c3e19 | 192 | bch_stop_on_failure_modes, |
7e027ca4 CL |
193 | dc->stop_when_cache_set_failed); |
194 | ||
195 | ||
cafe5635 KO |
196 | sysfs_printf(data_csum, "%i", dc->disk.data_csum); |
197 | var_printf(verify, "%i"); | |
5ceaaad7 | 198 | var_printf(bypass_torture_test, "%i"); |
cafe5635 KO |
199 | var_printf(writeback_metadata, "%i"); |
200 | var_printf(writeback_running, "%i"); | |
71dda2a5 | 201 | var_printf(writeback_consider_fragment, "%i"); |
cafe5635 KO |
202 | var_print(writeback_delay); |
203 | var_print(writeback_percent); | |
ea8c5356 CL |
204 | sysfs_hprint(writeback_rate, |
205 | wb ? atomic_long_read(&dc->writeback_rate.rate) << 9 : 0); | |
54619998 | 206 | sysfs_printf(io_errors, "%i", atomic_read(&dc->io_errors)); |
c7b7bd07 CL |
207 | sysfs_printf(io_error_limit, "%i", dc->error_limit); |
208 | sysfs_printf(io_disable, "%i", dc->io_disable); | |
cafe5635 | 209 | var_print(writeback_rate_update_seconds); |
1d316e65 | 210 | var_print(writeback_rate_i_term_inverse); |
cafe5635 | 211 | var_print(writeback_rate_p_term_inverse); |
71dda2a5 | 212 | var_print(writeback_rate_fp_term_low); |
213 | var_print(writeback_rate_fp_term_mid); | |
214 | var_print(writeback_rate_fp_term_high); | |
1d316e65 | 215 | var_print(writeback_rate_minimum); |
cafe5635 KO |
216 | |
217 | if (attr == &sysfs_writeback_rate_debug) { | |
16749c23 | 218 | char rate[20]; |
cafe5635 | 219 | char dirty[20]; |
cafe5635 | 220 | char target[20]; |
16749c23 | 221 | char proportional[20]; |
1d316e65 | 222 | char integral[20]; |
16749c23 KO |
223 | char change[20]; |
224 | s64 next_io; | |
225 | ||
b4cb6efc CL |
226 | /* |
227 | * Except for dirty and target, other values should | |
228 | * be 0 if writeback is not running. | |
229 | */ | |
ea8c5356 CL |
230 | bch_hprint(rate, |
231 | wb ? atomic_long_read(&dc->writeback_rate.rate) << 9 | |
232 | : 0); | |
b4cb6efc CL |
233 | bch_hprint(dirty, bcache_dev_sectors_dirty(&dc->disk) << 9); |
234 | bch_hprint(target, dc->writeback_rate_target << 9); | |
235 | bch_hprint(proportional, | |
236 | wb ? dc->writeback_rate_proportional << 9 : 0); | |
237 | bch_hprint(integral, | |
238 | wb ? dc->writeback_rate_integral_scaled << 9 : 0); | |
239 | bch_hprint(change, wb ? dc->writeback_rate_change << 9 : 0); | |
240 | next_io = wb ? div64_s64(dc->writeback_rate.next-local_clock(), | |
241 | NSEC_PER_MSEC) : 0; | |
cafe5635 KO |
242 | |
243 | return sprintf(buf, | |
16749c23 | 244 | "rate:\t\t%s/sec\n" |
cafe5635 | 245 | "dirty:\t\t%s\n" |
16749c23 KO |
246 | "target:\t\t%s\n" |
247 | "proportional:\t%s\n" | |
1d316e65 | 248 | "integral:\t%s\n" |
16749c23 KO |
249 | "change:\t\t%s/sec\n" |
250 | "next io:\t%llims\n", | |
251 | rate, dirty, target, proportional, | |
1d316e65 | 252 | integral, change, next_io); |
cafe5635 KO |
253 | } |
254 | ||
255 | sysfs_hprint(dirty_data, | |
279afbad | 256 | bcache_dev_sectors_dirty(&dc->disk) << 9); |
cafe5635 | 257 | |
688892b3 | 258 | sysfs_hprint(stripe_size, ((uint64_t)dc->disk.stripe_size) << 9); |
72c27061 KO |
259 | var_printf(partial_stripes_expensive, "%u"); |
260 | ||
cafe5635 | 261 | var_hprint(sequential_cutoff); |
cafe5635 KO |
262 | |
263 | sysfs_print(running, atomic_read(&dc->running)); | |
264 | sysfs_print(state, states[BDEV_STATE(&dc->sb)]); | |
265 | ||
266 | if (attr == &sysfs_label) { | |
267 | memcpy(buf, dc->sb.label, SB_LABEL_SIZE); | |
268 | buf[SB_LABEL_SIZE + 1] = '\0'; | |
269 | strcat(buf, "\n"); | |
270 | return strlen(buf); | |
271 | } | |
272 | ||
926d1946 | 273 | if (attr == &sysfs_backing_dev_name) { |
0f5cd781 | 274 | snprintf(buf, BDEVNAME_SIZE + 1, "%pg", dc->bdev); |
926d1946 CL |
275 | strcat(buf, "\n"); |
276 | return strlen(buf); | |
277 | } | |
278 | ||
d4610456 CL |
279 | if (attr == &sysfs_backing_dev_uuid) { |
280 | /* convert binary uuid into 36-byte string plus '\0' */ | |
281 | snprintf(buf, 36+1, "%pU", dc->sb.uuid); | |
282 | strcat(buf, "\n"); | |
283 | return strlen(buf); | |
284 | } | |
285 | ||
cafe5635 KO |
286 | #undef var |
287 | return 0; | |
288 | } | |
289 | SHOW_LOCKED(bch_cached_dev) | |
290 | ||
291 | STORE(__cached_dev) | |
292 | { | |
293 | struct cached_dev *dc = container_of(kobj, struct cached_dev, | |
294 | disk.kobj); | |
7f4fc93d | 295 | ssize_t v; |
cafe5635 | 296 | struct cache_set *c; |
ab9e1400 | 297 | struct kobj_uevent_env *env; |
cafe5635 | 298 | |
a59ff6cc CL |
299 | /* no user space access if system is rebooting */ |
300 | if (bcache_is_reboot) | |
301 | return -EBUSY; | |
302 | ||
cafe5635 | 303 | #define d_strtoul(var) sysfs_strtoul(var, dc->var) |
16749c23 | 304 | #define d_strtoul_nonzero(var) sysfs_strtoul_clamp(var, dc->var, 1, INT_MAX) |
cafe5635 KO |
305 | #define d_strtoi_h(var) sysfs_hatoi(var, dc->var) |
306 | ||
307 | sysfs_strtoul(data_csum, dc->disk.data_csum); | |
308 | d_strtoul(verify); | |
f5c0b95d CL |
309 | sysfs_strtoul_bool(bypass_torture_test, dc->bypass_torture_test); |
310 | sysfs_strtoul_bool(writeback_metadata, dc->writeback_metadata); | |
311 | sysfs_strtoul_bool(writeback_running, dc->writeback_running); | |
71dda2a5 | 312 | sysfs_strtoul_bool(writeback_consider_fragment, dc->writeback_consider_fragment); |
369d21a7 | 313 | sysfs_strtoul_clamp(writeback_delay, dc->writeback_delay, 0, UINT_MAX); |
16749c23 | 314 | |
cc38ca7e CL |
315 | sysfs_strtoul_clamp(writeback_percent, dc->writeback_percent, |
316 | 0, bch_cutoff_writeback); | |
cafe5635 | 317 | |
ea8c5356 | 318 | if (attr == &sysfs_writeback_rate) { |
46451874 CL |
319 | ssize_t ret; |
320 | long int v = atomic_long_read(&dc->writeback_rate.rate); | |
ea8c5356 | 321 | |
46451874 CL |
322 | ret = strtoul_safe_clamp(buf, v, 1, INT_MAX); |
323 | ||
324 | if (!ret) { | |
325 | atomic_long_set(&dc->writeback_rate.rate, v); | |
326 | ret = size; | |
327 | } | |
328 | ||
329 | return ret; | |
ea8c5356 | 330 | } |
16749c23 | 331 | |
7a5e3ecb CL |
332 | sysfs_strtoul_clamp(writeback_rate_update_seconds, |
333 | dc->writeback_rate_update_seconds, | |
334 | 1, WRITEBACK_RATE_UPDATE_SECS_MAX); | |
c3b75a21 CL |
335 | sysfs_strtoul_clamp(writeback_rate_i_term_inverse, |
336 | dc->writeback_rate_i_term_inverse, | |
337 | 1, UINT_MAX); | |
5b5fd3c9 CL |
338 | sysfs_strtoul_clamp(writeback_rate_p_term_inverse, |
339 | dc->writeback_rate_p_term_inverse, | |
340 | 1, UINT_MAX); | |
71dda2a5 | 341 | sysfs_strtoul_clamp(writeback_rate_fp_term_low, |
342 | dc->writeback_rate_fp_term_low, | |
343 | 1, dc->writeback_rate_fp_term_mid - 1); | |
344 | sysfs_strtoul_clamp(writeback_rate_fp_term_mid, | |
345 | dc->writeback_rate_fp_term_mid, | |
346 | dc->writeback_rate_fp_term_low + 1, | |
347 | dc->writeback_rate_fp_term_high - 1); | |
348 | sysfs_strtoul_clamp(writeback_rate_fp_term_high, | |
349 | dc->writeback_rate_fp_term_high, | |
350 | dc->writeback_rate_fp_term_mid + 1, UINT_MAX); | |
dab71b2d CL |
351 | sysfs_strtoul_clamp(writeback_rate_minimum, |
352 | dc->writeback_rate_minimum, | |
353 | 1, UINT_MAX); | |
cafe5635 | 354 | |
c7b7bd07 CL |
355 | sysfs_strtoul_clamp(io_error_limit, dc->error_limit, 0, INT_MAX); |
356 | ||
357 | if (attr == &sysfs_io_disable) { | |
358 | int v = strtoul_or_return(buf); | |
359 | ||
360 | dc->io_disable = v ? 1 : 0; | |
361 | } | |
362 | ||
8c27a395 CL |
363 | sysfs_strtoul_clamp(sequential_cutoff, |
364 | dc->sequential_cutoff, | |
365 | 0, UINT_MAX); | |
cafe5635 KO |
366 | |
367 | if (attr == &sysfs_clear_stats) | |
368 | bch_cache_accounting_clear(&dc->accounting); | |
369 | ||
370 | if (attr == &sysfs_running && | |
0b13efec CL |
371 | strtoul_or_return(buf)) { |
372 | v = bch_cached_dev_run(dc); | |
373 | if (v) | |
374 | return v; | |
375 | } | |
cafe5635 KO |
376 | |
377 | if (attr == &sysfs_cache_mode) { | |
20621fed | 378 | v = __sysfs_match_string(bch_cache_modes, -1, buf); |
cafe5635 KO |
379 | if (v < 0) |
380 | return v; | |
381 | ||
6f10f7d1 | 382 | if ((unsigned int) v != BDEV_CACHE_MODE(&dc->sb)) { |
cafe5635 KO |
383 | SET_BDEV_CACHE_MODE(&dc->sb, v); |
384 | bch_write_bdev_super(dc, NULL); | |
385 | } | |
386 | } | |
387 | ||
038ba8cc CL |
388 | if (attr == &sysfs_readahead_cache_policy) { |
389 | v = __sysfs_match_string(bch_reada_cache_policies, -1, buf); | |
390 | if (v < 0) | |
391 | return v; | |
392 | ||
393 | if ((unsigned int) v != dc->cache_readahead_policy) | |
394 | dc->cache_readahead_policy = v; | |
395 | } | |
396 | ||
7e027ca4 | 397 | if (attr == &sysfs_stop_when_cache_set_failed) { |
20621fed | 398 | v = __sysfs_match_string(bch_stop_on_failure_modes, -1, buf); |
7e027ca4 CL |
399 | if (v < 0) |
400 | return v; | |
401 | ||
402 | dc->stop_when_cache_set_failed = v; | |
403 | } | |
404 | ||
cafe5635 | 405 | if (attr == &sysfs_label) { |
aee6f1cf GP |
406 | if (size > SB_LABEL_SIZE) |
407 | return -EINVAL; | |
408 | memcpy(dc->sb.label, buf, size); | |
409 | if (size < SB_LABEL_SIZE) | |
410 | dc->sb.label[size] = '\0'; | |
411 | if (size && dc->sb.label[size - 1] == '\n') | |
412 | dc->sb.label[size - 1] = '\0'; | |
cafe5635 KO |
413 | bch_write_bdev_super(dc, NULL); |
414 | if (dc->disk.c) { | |
415 | memcpy(dc->disk.c->uuids[dc->disk.id].label, | |
416 | buf, SB_LABEL_SIZE); | |
417 | bch_uuid_write(dc->disk.c); | |
418 | } | |
ab9e1400 | 419 | env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL); |
d2a65ce2 DC |
420 | if (!env) |
421 | return -ENOMEM; | |
ab9e1400 | 422 | add_uevent_var(env, "DRIVER=bcache"); |
46926127 | 423 | add_uevent_var(env, "CACHED_UUID=%pU", dc->sb.uuid); |
ab9e1400 | 424 | add_uevent_var(env, "CACHED_LABEL=%s", buf); |
b0d30981 CL |
425 | kobject_uevent_env(&disk_to_dev(dc->disk.disk)->kobj, |
426 | KOBJ_CHANGE, | |
427 | env->envp); | |
ab9e1400 | 428 | kfree(env); |
cafe5635 KO |
429 | } |
430 | ||
431 | if (attr == &sysfs_attach) { | |
73ac105b TJ |
432 | uint8_t set_uuid[16]; |
433 | ||
434 | if (bch_parse_uuid(buf, set_uuid) < 16) | |
cafe5635 KO |
435 | return -EINVAL; |
436 | ||
7f4fc93d | 437 | v = -ENOENT; |
cafe5635 | 438 | list_for_each_entry(c, &bch_cache_sets, list) { |
73ac105b | 439 | v = bch_cached_dev_attach(dc, c, set_uuid); |
cafe5635 KO |
440 | if (!v) |
441 | return size; | |
442 | } | |
e921efeb | 443 | if (v == -ENOENT) |
46f5aa88 | 444 | pr_err("Can't attach %s: cache set not found\n", buf); |
7f4fc93d | 445 | return v; |
cafe5635 KO |
446 | } |
447 | ||
448 | if (attr == &sysfs_detach && dc->disk.c) | |
449 | bch_cached_dev_detach(dc); | |
450 | ||
451 | if (attr == &sysfs_stop) | |
452 | bcache_device_stop(&dc->disk); | |
453 | ||
454 | return size; | |
455 | } | |
456 | ||
457 | STORE(bch_cached_dev) | |
458 | { | |
459 | struct cached_dev *dc = container_of(kobj, struct cached_dev, | |
460 | disk.kobj); | |
461 | ||
a59ff6cc CL |
462 | /* no user space access if system is rebooting */ |
463 | if (bcache_is_reboot) | |
464 | return -EBUSY; | |
465 | ||
cafe5635 KO |
466 | mutex_lock(&bch_register_lock); |
467 | size = __cached_dev_store(kobj, attr, buf, size); | |
468 | ||
f383ae30 SW |
469 | if (attr == &sysfs_writeback_running) { |
470 | /* dc->writeback_running changed in __cached_dev_store() */ | |
471 | if (IS_ERR_OR_NULL(dc->writeback_thread)) { | |
472 | /* | |
473 | * reject setting it to 1 via sysfs if writeback | |
474 | * kthread is not created yet. | |
475 | */ | |
476 | if (dc->writeback_running) { | |
477 | dc->writeback_running = false; | |
46f5aa88 | 478 | pr_err("%s: failed to run non-existent writeback thread\n", |
f383ae30 SW |
479 | dc->disk.disk->disk_name); |
480 | } | |
481 | } else | |
482 | /* | |
483 | * writeback kthread will check if dc->writeback_running | |
484 | * is true or false. | |
485 | */ | |
486 | bch_writeback_queue(dc); | |
487 | } | |
cafe5635 | 488 | |
1f0ffa67 CL |
489 | /* |
490 | * Only set BCACHE_DEV_WB_RUNNING when cached device attached to | |
491 | * a cache set, otherwise it doesn't make sense. | |
492 | */ | |
cafe5635 | 493 | if (attr == &sysfs_writeback_percent) |
1f0ffa67 CL |
494 | if ((dc->disk.c != NULL) && |
495 | (!test_and_set_bit(BCACHE_DEV_WB_RUNNING, &dc->disk.flags))) | |
3fd47bfe | 496 | schedule_delayed_work(&dc->writeback_rate_update, |
cafe5635 KO |
497 | dc->writeback_rate_update_seconds * HZ); |
498 | ||
499 | mutex_unlock(&bch_register_lock); | |
500 | return size; | |
501 | } | |
502 | ||
fa97cb84 | 503 | static struct attribute *bch_cached_dev_attrs[] = { |
cafe5635 KO |
504 | &sysfs_attach, |
505 | &sysfs_detach, | |
506 | &sysfs_stop, | |
507 | #if 0 | |
508 | &sysfs_data_csum, | |
509 | #endif | |
510 | &sysfs_cache_mode, | |
038ba8cc | 511 | &sysfs_readahead_cache_policy, |
7e027ca4 | 512 | &sysfs_stop_when_cache_set_failed, |
cafe5635 KO |
513 | &sysfs_writeback_metadata, |
514 | &sysfs_writeback_running, | |
515 | &sysfs_writeback_delay, | |
516 | &sysfs_writeback_percent, | |
517 | &sysfs_writeback_rate, | |
71dda2a5 | 518 | &sysfs_writeback_consider_fragment, |
cafe5635 | 519 | &sysfs_writeback_rate_update_seconds, |
1d316e65 | 520 | &sysfs_writeback_rate_i_term_inverse, |
cafe5635 | 521 | &sysfs_writeback_rate_p_term_inverse, |
71dda2a5 | 522 | &sysfs_writeback_rate_fp_term_low, |
523 | &sysfs_writeback_rate_fp_term_mid, | |
524 | &sysfs_writeback_rate_fp_term_high, | |
7567c2a2 | 525 | &sysfs_writeback_rate_minimum, |
cafe5635 | 526 | &sysfs_writeback_rate_debug, |
54619998 | 527 | &sysfs_io_errors, |
c7b7bd07 CL |
528 | &sysfs_io_error_limit, |
529 | &sysfs_io_disable, | |
cafe5635 | 530 | &sysfs_dirty_data, |
72c27061 KO |
531 | &sysfs_stripe_size, |
532 | &sysfs_partial_stripes_expensive, | |
cafe5635 | 533 | &sysfs_sequential_cutoff, |
cafe5635 KO |
534 | &sysfs_clear_stats, |
535 | &sysfs_running, | |
536 | &sysfs_state, | |
537 | &sysfs_label, | |
cafe5635 KO |
538 | #ifdef CONFIG_BCACHE_DEBUG |
539 | &sysfs_verify, | |
5ceaaad7 | 540 | &sysfs_bypass_torture_test, |
cafe5635 | 541 | #endif |
926d1946 | 542 | &sysfs_backing_dev_name, |
d4610456 | 543 | &sysfs_backing_dev_uuid, |
cafe5635 KO |
544 | NULL |
545 | }; | |
fa97cb84 | 546 | ATTRIBUTE_GROUPS(bch_cached_dev); |
cafe5635 KO |
547 | KTYPE(bch_cached_dev); |
548 | ||
549 | SHOW(bch_flash_dev) | |
550 | { | |
551 | struct bcache_device *d = container_of(kobj, struct bcache_device, | |
552 | kobj); | |
553 | struct uuid_entry *u = &d->c->uuids[d->id]; | |
554 | ||
555 | sysfs_printf(data_csum, "%i", d->data_csum); | |
556 | sysfs_hprint(size, u->sectors << 9); | |
557 | ||
558 | if (attr == &sysfs_label) { | |
559 | memcpy(buf, u->label, SB_LABEL_SIZE); | |
560 | buf[SB_LABEL_SIZE + 1] = '\0'; | |
561 | strcat(buf, "\n"); | |
562 | return strlen(buf); | |
563 | } | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
568 | STORE(__bch_flash_dev) | |
569 | { | |
570 | struct bcache_device *d = container_of(kobj, struct bcache_device, | |
571 | kobj); | |
572 | struct uuid_entry *u = &d->c->uuids[d->id]; | |
573 | ||
a59ff6cc CL |
574 | /* no user space access if system is rebooting */ |
575 | if (bcache_is_reboot) | |
576 | return -EBUSY; | |
577 | ||
cafe5635 KO |
578 | sysfs_strtoul(data_csum, d->data_csum); |
579 | ||
580 | if (attr == &sysfs_size) { | |
581 | uint64_t v; | |
1fae7cf0 | 582 | |
cafe5635 KO |
583 | strtoi_h_or_return(buf, v); |
584 | ||
585 | u->sectors = v >> 9; | |
586 | bch_uuid_write(d->c); | |
587 | set_capacity(d->disk, u->sectors); | |
588 | } | |
589 | ||
590 | if (attr == &sysfs_label) { | |
591 | memcpy(u->label, buf, SB_LABEL_SIZE); | |
592 | bch_uuid_write(d->c); | |
593 | } | |
594 | ||
595 | if (attr == &sysfs_unregister) { | |
c4d951dd | 596 | set_bit(BCACHE_DEV_DETACHING, &d->flags); |
cafe5635 KO |
597 | bcache_device_stop(d); |
598 | } | |
599 | ||
600 | return size; | |
601 | } | |
602 | STORE_LOCKED(bch_flash_dev) | |
603 | ||
fa97cb84 | 604 | static struct attribute *bch_flash_dev_attrs[] = { |
cafe5635 KO |
605 | &sysfs_unregister, |
606 | #if 0 | |
607 | &sysfs_data_csum, | |
608 | #endif | |
609 | &sysfs_label, | |
610 | &sysfs_size, | |
611 | NULL | |
612 | }; | |
fa97cb84 | 613 | ATTRIBUTE_GROUPS(bch_flash_dev); |
cafe5635 KO |
614 | KTYPE(bch_flash_dev); |
615 | ||
f67342dd KO |
616 | struct bset_stats_op { |
617 | struct btree_op op; | |
618 | size_t nodes; | |
619 | struct bset_stats stats; | |
620 | }; | |
621 | ||
cb851149 | 622 | static int bch_btree_bset_stats(struct btree_op *b_op, struct btree *b) |
f67342dd KO |
623 | { |
624 | struct bset_stats_op *op = container_of(b_op, struct bset_stats_op, op); | |
625 | ||
626 | op->nodes++; | |
627 | bch_btree_keys_stats(&b->keys, &op->stats); | |
628 | ||
629 | return MAP_CONTINUE; | |
630 | } | |
631 | ||
3572324a | 632 | static int bch_bset_print_stats(struct cache_set *c, char *buf) |
f67342dd KO |
633 | { |
634 | struct bset_stats_op op; | |
635 | int ret; | |
636 | ||
637 | memset(&op, 0, sizeof(op)); | |
638 | bch_btree_op_init(&op.op, -1); | |
639 | ||
cb851149 | 640 | ret = bch_btree_map_nodes(&op.op, c, &ZERO_KEY, bch_btree_bset_stats); |
f67342dd KO |
641 | if (ret < 0) |
642 | return ret; | |
643 | ||
644 | return snprintf(buf, PAGE_SIZE, | |
645 | "btree nodes: %zu\n" | |
646 | "written sets: %zu\n" | |
647 | "unwritten sets: %zu\n" | |
648 | "written key bytes: %zu\n" | |
649 | "unwritten key bytes: %zu\n" | |
650 | "floats: %zu\n" | |
651 | "failed: %zu\n", | |
652 | op.nodes, | |
653 | op.stats.sets_written, op.stats.sets_unwritten, | |
654 | op.stats.bytes_written, op.stats.bytes_unwritten, | |
655 | op.stats.floats, op.stats.failed); | |
656 | } | |
657 | ||
6f10f7d1 | 658 | static unsigned int bch_root_usage(struct cache_set *c) |
cafe5635 | 659 | { |
6f10f7d1 | 660 | unsigned int bytes = 0; |
cb851149 JS |
661 | struct bkey *k; |
662 | struct btree *b; | |
663 | struct btree_iter iter; | |
cafe5635 | 664 | |
cb851149 | 665 | goto lock_root; |
cafe5635 | 666 | |
cb851149 JS |
667 | do { |
668 | rw_unlock(false, b); | |
cafe5635 | 669 | lock_root: |
cb851149 JS |
670 | b = c->root; |
671 | rw_lock(false, b, b->level); | |
672 | } while (b != c->root); | |
cafe5635 | 673 | |
cb851149 JS |
674 | for_each_key_filter(&b->keys, k, &iter, bch_ptr_bad) |
675 | bytes += bkey_bytes(k); | |
cafe5635 | 676 | |
cb851149 | 677 | rw_unlock(false, b); |
cafe5635 | 678 | |
cb851149 JS |
679 | return (bytes * 100) / btree_bytes(c); |
680 | } | |
cafe5635 | 681 | |
cb851149 JS |
682 | static size_t bch_cache_size(struct cache_set *c) |
683 | { | |
684 | size_t ret = 0; | |
685 | struct btree *b; | |
cafe5635 | 686 | |
cb851149 JS |
687 | mutex_lock(&c->bucket_lock); |
688 | list_for_each_entry(b, &c->btree_cache, list) | |
689 | ret += 1 << (b->keys.page_order + PAGE_SHIFT); | |
cafe5635 | 690 | |
cb851149 JS |
691 | mutex_unlock(&c->bucket_lock); |
692 | return ret; | |
693 | } | |
cafe5635 | 694 | |
6f10f7d1 | 695 | static unsigned int bch_cache_max_chain(struct cache_set *c) |
cb851149 | 696 | { |
6f10f7d1 | 697 | unsigned int ret = 0; |
cb851149 | 698 | struct hlist_head *h; |
cafe5635 | 699 | |
cb851149 | 700 | mutex_lock(&c->bucket_lock); |
cafe5635 | 701 | |
cb851149 JS |
702 | for (h = c->bucket_hash; |
703 | h < c->bucket_hash + (1 << BUCKET_HASH_BITS); | |
704 | h++) { | |
6f10f7d1 | 705 | unsigned int i = 0; |
cb851149 | 706 | struct hlist_node *p; |
cafe5635 | 707 | |
cb851149 JS |
708 | hlist_for_each(p, h) |
709 | i++; | |
cafe5635 | 710 | |
cb851149 | 711 | ret = max(ret, i); |
cafe5635 KO |
712 | } |
713 | ||
cb851149 JS |
714 | mutex_unlock(&c->bucket_lock); |
715 | return ret; | |
716 | } | |
cafe5635 | 717 | |
6f10f7d1 | 718 | static unsigned int bch_btree_used(struct cache_set *c) |
cb851149 JS |
719 | { |
720 | return div64_u64(c->gc_stats.key_bytes * 100, | |
721 | (c->gc_stats.nodes ?: 1) * btree_bytes(c)); | |
722 | } | |
cafe5635 | 723 | |
6f10f7d1 | 724 | static unsigned int bch_average_key_size(struct cache_set *c) |
cb851149 JS |
725 | { |
726 | return c->gc_stats.nkeys | |
727 | ? div64_u64(c->gc_stats.data, c->gc_stats.nkeys) | |
728 | : 0; | |
729 | } | |
730 | ||
731 | SHOW(__bch_cache_set) | |
732 | { | |
cafe5635 KO |
733 | struct cache_set *c = container_of(kobj, struct cache_set, kobj); |
734 | ||
6f9414e0 | 735 | sysfs_print(synchronous, CACHE_SYNC(&c->cache->sb)); |
cafe5635 | 736 | sysfs_print(journal_delay_ms, c->journal_delay_ms); |
63a96c05 | 737 | sysfs_hprint(bucket_size, bucket_bytes(c->cache)); |
4e1ebae3 | 738 | sysfs_hprint(block_size, block_bytes(c->cache)); |
cafe5635 | 739 | sysfs_print(tree_depth, c->root->level); |
cb851149 | 740 | sysfs_print(root_usage_percent, bch_root_usage(c)); |
cafe5635 | 741 | |
cb851149 JS |
742 | sysfs_hprint(btree_cache_size, bch_cache_size(c)); |
743 | sysfs_print(btree_cache_max_chain, bch_cache_max_chain(c)); | |
cafe5635 KO |
744 | sysfs_print(cache_available_percent, 100 - c->gc_stats.in_use); |
745 | ||
746 | sysfs_print_time_stats(&c->btree_gc_time, btree_gc, sec, ms); | |
747 | sysfs_print_time_stats(&c->btree_split_time, btree_split, sec, us); | |
67539e85 | 748 | sysfs_print_time_stats(&c->sort.time, btree_sort, ms, us); |
cafe5635 | 749 | sysfs_print_time_stats(&c->btree_read_time, btree_read, ms, us); |
cafe5635 | 750 | |
cb851149 | 751 | sysfs_print(btree_used_percent, bch_btree_used(c)); |
cafe5635 | 752 | sysfs_print(btree_nodes, c->gc_stats.nodes); |
cb851149 | 753 | sysfs_hprint(average_key_size, bch_average_key_size(c)); |
cafe5635 KO |
754 | |
755 | sysfs_print(cache_read_races, | |
756 | atomic_long_read(&c->cache_read_races)); | |
757 | ||
a728eacb TJ |
758 | sysfs_print(reclaim, |
759 | atomic_long_read(&c->reclaim)); | |
760 | ||
dff90d58 CL |
761 | sysfs_print(reclaimed_journal_buckets, |
762 | atomic_long_read(&c->reclaimed_journal_buckets)); | |
763 | ||
a728eacb TJ |
764 | sysfs_print(flush_write, |
765 | atomic_long_read(&c->flush_write)); | |
766 | ||
cafe5635 KO |
767 | sysfs_print(writeback_keys_done, |
768 | atomic_long_read(&c->writeback_keys_done)); | |
769 | sysfs_print(writeback_keys_failed, | |
770 | atomic_long_read(&c->writeback_keys_failed)); | |
771 | ||
77c320eb KO |
772 | if (attr == &sysfs_errors) |
773 | return bch_snprint_string_list(buf, PAGE_SIZE, error_actions, | |
774 | c->on_error); | |
775 | ||
cafe5635 KO |
776 | /* See count_io_errors for why 88 */ |
777 | sysfs_print(io_error_halflife, c->error_decay * 88); | |
7ba0d830 | 778 | sysfs_print(io_error_limit, c->error_limit); |
cafe5635 KO |
779 | |
780 | sysfs_hprint(congested, | |
781 | ((uint64_t) bch_get_congested(c)) << 9); | |
782 | sysfs_print(congested_read_threshold_us, | |
783 | c->congested_read_threshold_us); | |
784 | sysfs_print(congested_write_threshold_us, | |
785 | c->congested_write_threshold_us); | |
786 | ||
9aaf5165 CL |
787 | sysfs_print(cutoff_writeback, bch_cutoff_writeback); |
788 | sysfs_print(cutoff_writeback_sync, bch_cutoff_writeback_sync); | |
789 | ||
cafe5635 KO |
790 | sysfs_print(active_journal_entries, fifo_used(&c->journal.pin)); |
791 | sysfs_printf(verify, "%i", c->verify); | |
792 | sysfs_printf(key_merging_disabled, "%i", c->key_merging_disabled); | |
280481d0 KO |
793 | sysfs_printf(expensive_debug_checks, |
794 | "%i", c->expensive_debug_checks); | |
cafe5635 KO |
795 | sysfs_printf(gc_always_rewrite, "%i", c->gc_always_rewrite); |
796 | sysfs_printf(btree_shrinker_disabled, "%i", c->shrinker_disabled); | |
797 | sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled); | |
c5fcdedc CL |
798 | sysfs_printf(idle_max_writeback_rate, "%i", |
799 | c->idle_max_writeback_rate_enabled); | |
7a671d8e | 800 | sysfs_printf(gc_after_writeback, "%i", c->gc_after_writeback); |
771f393e CL |
801 | sysfs_printf(io_disable, "%i", |
802 | test_bit(CACHE_SET_IO_DISABLE, &c->flags)); | |
cafe5635 KO |
803 | |
804 | if (attr == &sysfs_bset_tree_stats) | |
805 | return bch_bset_print_stats(c, buf); | |
806 | ||
092bd54d CL |
807 | if (attr == &sysfs_feature_compat) |
808 | return bch_print_cache_set_feature_compat(c, buf, PAGE_SIZE); | |
809 | if (attr == &sysfs_feature_ro_compat) | |
810 | return bch_print_cache_set_feature_ro_compat(c, buf, PAGE_SIZE); | |
811 | if (attr == &sysfs_feature_incompat) | |
812 | return bch_print_cache_set_feature_incompat(c, buf, PAGE_SIZE); | |
813 | ||
cafe5635 KO |
814 | return 0; |
815 | } | |
816 | SHOW_LOCKED(bch_cache_set) | |
817 | ||
818 | STORE(__bch_cache_set) | |
819 | { | |
820 | struct cache_set *c = container_of(kobj, struct cache_set, kobj); | |
ce4c3e19 | 821 | ssize_t v; |
cafe5635 | 822 | |
a59ff6cc CL |
823 | /* no user space access if system is rebooting */ |
824 | if (bcache_is_reboot) | |
825 | return -EBUSY; | |
826 | ||
cafe5635 KO |
827 | if (attr == &sysfs_unregister) |
828 | bch_cache_set_unregister(c); | |
829 | ||
830 | if (attr == &sysfs_stop) | |
831 | bch_cache_set_stop(c); | |
832 | ||
833 | if (attr == &sysfs_synchronous) { | |
834 | bool sync = strtoul_or_return(buf); | |
835 | ||
6f9414e0 CL |
836 | if (sync != CACHE_SYNC(&c->cache->sb)) { |
837 | SET_CACHE_SYNC(&c->cache->sb, sync); | |
cafe5635 KO |
838 | bcache_write_super(c); |
839 | } | |
840 | } | |
841 | ||
842 | if (attr == &sysfs_flash_vol_create) { | |
843 | int r; | |
844 | uint64_t v; | |
1fae7cf0 | 845 | |
cafe5635 KO |
846 | strtoi_h_or_return(buf, v); |
847 | ||
848 | r = bch_flash_dev_create(c, v); | |
849 | if (r) | |
850 | return r; | |
851 | } | |
852 | ||
853 | if (attr == &sysfs_clear_stats) { | |
854 | atomic_long_set(&c->writeback_keys_done, 0); | |
855 | atomic_long_set(&c->writeback_keys_failed, 0); | |
856 | ||
857 | memset(&c->gc_stats, 0, sizeof(struct gc_stat)); | |
858 | bch_cache_accounting_clear(&c->accounting); | |
859 | } | |
860 | ||
cb07ad63 CL |
861 | if (attr == &sysfs_trigger_gc) |
862 | force_wake_up_gc(c); | |
cafe5635 KO |
863 | |
864 | if (attr == &sysfs_prune_cache) { | |
865 | struct shrink_control sc; | |
1fae7cf0 | 866 | |
cafe5635 KO |
867 | sc.gfp_mask = GFP_KERNEL; |
868 | sc.nr_to_scan = strtoul_or_return(buf); | |
7dc19d5a | 869 | c->shrink.scan_objects(&c->shrink, &sc); |
cafe5635 KO |
870 | } |
871 | ||
f54478c6 CL |
872 | sysfs_strtoul_clamp(congested_read_threshold_us, |
873 | c->congested_read_threshold_us, | |
874 | 0, UINT_MAX); | |
875 | sysfs_strtoul_clamp(congested_write_threshold_us, | |
876 | c->congested_write_threshold_us, | |
877 | 0, UINT_MAX); | |
cafe5635 | 878 | |
77c320eb | 879 | if (attr == &sysfs_errors) { |
20621fed | 880 | v = __sysfs_match_string(error_actions, -1, buf); |
77c320eb KO |
881 | if (v < 0) |
882 | return v; | |
883 | ||
884 | c->on_error = v; | |
885 | } | |
886 | ||
b1500840 | 887 | sysfs_strtoul_clamp(io_error_limit, c->error_limit, 0, UINT_MAX); |
cafe5635 KO |
888 | |
889 | /* See count_io_errors() for why 88 */ | |
a91fbda4 CL |
890 | if (attr == &sysfs_io_error_halflife) { |
891 | unsigned long v = 0; | |
892 | ssize_t ret; | |
893 | ||
894 | ret = strtoul_safe_clamp(buf, v, 0, UINT_MAX); | |
895 | if (!ret) { | |
896 | c->error_decay = v / 88; | |
897 | return size; | |
898 | } | |
899 | return ret; | |
900 | } | |
cafe5635 | 901 | |
771f393e | 902 | if (attr == &sysfs_io_disable) { |
ce4c3e19 | 903 | v = strtoul_or_return(buf); |
771f393e CL |
904 | if (v) { |
905 | if (test_and_set_bit(CACHE_SET_IO_DISABLE, | |
906 | &c->flags)) | |
46f5aa88 | 907 | pr_warn("CACHE_SET_IO_DISABLE already set\n"); |
771f393e CL |
908 | } else { |
909 | if (!test_and_clear_bit(CACHE_SET_IO_DISABLE, | |
910 | &c->flags)) | |
46f5aa88 | 911 | pr_warn("CACHE_SET_IO_DISABLE already cleared\n"); |
771f393e CL |
912 | } |
913 | } | |
914 | ||
453745fb CL |
915 | sysfs_strtoul_clamp(journal_delay_ms, |
916 | c->journal_delay_ms, | |
917 | 0, USHRT_MAX); | |
f5c0b95d CL |
918 | sysfs_strtoul_bool(verify, c->verify); |
919 | sysfs_strtoul_bool(key_merging_disabled, c->key_merging_disabled); | |
280481d0 | 920 | sysfs_strtoul(expensive_debug_checks, c->expensive_debug_checks); |
f5c0b95d CL |
921 | sysfs_strtoul_bool(gc_always_rewrite, c->gc_always_rewrite); |
922 | sysfs_strtoul_bool(btree_shrinker_disabled, c->shrinker_disabled); | |
923 | sysfs_strtoul_bool(copy_gc_enabled, c->copy_gc_enabled); | |
c5fcdedc CL |
924 | sysfs_strtoul_bool(idle_max_writeback_rate, |
925 | c->idle_max_writeback_rate_enabled); | |
926 | ||
7a671d8e CL |
927 | /* |
928 | * write gc_after_writeback here may overwrite an already set | |
929 | * BCH_DO_AUTO_GC, it doesn't matter because this flag will be | |
930 | * set in next chance. | |
931 | */ | |
932 | sysfs_strtoul_clamp(gc_after_writeback, c->gc_after_writeback, 0, 1); | |
cafe5635 KO |
933 | |
934 | return size; | |
935 | } | |
936 | STORE_LOCKED(bch_cache_set) | |
937 | ||
938 | SHOW(bch_cache_set_internal) | |
939 | { | |
940 | struct cache_set *c = container_of(kobj, struct cache_set, internal); | |
1fae7cf0 | 941 | |
cafe5635 KO |
942 | return bch_cache_set_show(&c->kobj, attr, buf); |
943 | } | |
944 | ||
945 | STORE(bch_cache_set_internal) | |
946 | { | |
947 | struct cache_set *c = container_of(kobj, struct cache_set, internal); | |
1fae7cf0 | 948 | |
a59ff6cc CL |
949 | /* no user space access if system is rebooting */ |
950 | if (bcache_is_reboot) | |
951 | return -EBUSY; | |
952 | ||
cafe5635 KO |
953 | return bch_cache_set_store(&c->kobj, attr, buf, size); |
954 | } | |
955 | ||
956 | static void bch_cache_set_internal_release(struct kobject *k) | |
957 | { | |
958 | } | |
959 | ||
fa97cb84 | 960 | static struct attribute *bch_cache_set_attrs[] = { |
cafe5635 KO |
961 | &sysfs_unregister, |
962 | &sysfs_stop, | |
963 | &sysfs_synchronous, | |
964 | &sysfs_journal_delay_ms, | |
965 | &sysfs_flash_vol_create, | |
966 | ||
967 | &sysfs_bucket_size, | |
968 | &sysfs_block_size, | |
969 | &sysfs_tree_depth, | |
970 | &sysfs_root_usage_percent, | |
971 | &sysfs_btree_cache_size, | |
972 | &sysfs_cache_available_percent, | |
973 | ||
974 | &sysfs_average_key_size, | |
cafe5635 | 975 | |
77c320eb | 976 | &sysfs_errors, |
cafe5635 KO |
977 | &sysfs_io_error_limit, |
978 | &sysfs_io_error_halflife, | |
979 | &sysfs_congested, | |
980 | &sysfs_congested_read_threshold_us, | |
981 | &sysfs_congested_write_threshold_us, | |
982 | &sysfs_clear_stats, | |
983 | NULL | |
984 | }; | |
fa97cb84 | 985 | ATTRIBUTE_GROUPS(bch_cache_set); |
cafe5635 KO |
986 | KTYPE(bch_cache_set); |
987 | ||
fa97cb84 | 988 | static struct attribute *bch_cache_set_internal_attrs[] = { |
cafe5635 KO |
989 | &sysfs_active_journal_entries, |
990 | ||
991 | sysfs_time_stats_attribute_list(btree_gc, sec, ms) | |
992 | sysfs_time_stats_attribute_list(btree_split, sec, us) | |
993 | sysfs_time_stats_attribute_list(btree_sort, ms, us) | |
994 | sysfs_time_stats_attribute_list(btree_read, ms, us) | |
cafe5635 KO |
995 | |
996 | &sysfs_btree_nodes, | |
997 | &sysfs_btree_used_percent, | |
998 | &sysfs_btree_cache_max_chain, | |
999 | ||
1000 | &sysfs_bset_tree_stats, | |
1001 | &sysfs_cache_read_races, | |
a728eacb | 1002 | &sysfs_reclaim, |
dff90d58 | 1003 | &sysfs_reclaimed_journal_buckets, |
a728eacb | 1004 | &sysfs_flush_write, |
cafe5635 KO |
1005 | &sysfs_writeback_keys_done, |
1006 | &sysfs_writeback_keys_failed, | |
1007 | ||
1008 | &sysfs_trigger_gc, | |
1009 | &sysfs_prune_cache, | |
1010 | #ifdef CONFIG_BCACHE_DEBUG | |
1011 | &sysfs_verify, | |
1012 | &sysfs_key_merging_disabled, | |
280481d0 | 1013 | &sysfs_expensive_debug_checks, |
cafe5635 KO |
1014 | #endif |
1015 | &sysfs_gc_always_rewrite, | |
1016 | &sysfs_btree_shrinker_disabled, | |
1017 | &sysfs_copy_gc_enabled, | |
c5fcdedc | 1018 | &sysfs_idle_max_writeback_rate, |
7a671d8e | 1019 | &sysfs_gc_after_writeback, |
771f393e | 1020 | &sysfs_io_disable, |
9aaf5165 CL |
1021 | &sysfs_cutoff_writeback, |
1022 | &sysfs_cutoff_writeback_sync, | |
092bd54d CL |
1023 | &sysfs_feature_compat, |
1024 | &sysfs_feature_ro_compat, | |
1025 | &sysfs_feature_incompat, | |
cafe5635 KO |
1026 | NULL |
1027 | }; | |
fa97cb84 | 1028 | ATTRIBUTE_GROUPS(bch_cache_set_internal); |
cafe5635 KO |
1029 | KTYPE(bch_cache_set_internal); |
1030 | ||
58f913dc PF |
1031 | static int __bch_cache_cmp(const void *l, const void *r) |
1032 | { | |
d55a4ae9 | 1033 | cond_resched(); |
58f913dc PF |
1034 | return *((uint16_t *)r) - *((uint16_t *)l); |
1035 | } | |
1036 | ||
cafe5635 KO |
1037 | SHOW(__bch_cache) |
1038 | { | |
1039 | struct cache *ca = container_of(kobj, struct cache, kobj); | |
1040 | ||
1041 | sysfs_hprint(bucket_size, bucket_bytes(ca)); | |
1042 | sysfs_hprint(block_size, block_bytes(ca)); | |
1043 | sysfs_print(nbuckets, ca->sb.nbuckets); | |
1044 | sysfs_print(discard, ca->discard); | |
1045 | sysfs_hprint(written, atomic_long_read(&ca->sectors_written) << 9); | |
1046 | sysfs_hprint(btree_written, | |
1047 | atomic_long_read(&ca->btree_sectors_written) << 9); | |
1048 | sysfs_hprint(metadata_written, | |
1049 | (atomic_long_read(&ca->meta_sectors_written) + | |
1050 | atomic_long_read(&ca->btree_sectors_written)) << 9); | |
1051 | ||
1052 | sysfs_print(io_errors, | |
1053 | atomic_read(&ca->io_errors) >> IO_ERROR_SHIFT); | |
1054 | ||
cafe5635 | 1055 | if (attr == &sysfs_cache_replacement_policy) |
169ef1cf KO |
1056 | return bch_snprint_string_list(buf, PAGE_SIZE, |
1057 | cache_replacement_policies, | |
1058 | CACHE_REPLACEMENT(&ca->sb)); | |
cafe5635 KO |
1059 | |
1060 | if (attr == &sysfs_priority_stats) { | |
15754020 KO |
1061 | struct bucket *b; |
1062 | size_t n = ca->sb.nbuckets, i; | |
1063 | size_t unused = 0, available = 0, dirty = 0, meta = 0; | |
cafe5635 | 1064 | uint64_t sum = 0; |
bbc77aa7 KO |
1065 | /* Compute 31 quantiles */ |
1066 | uint16_t q[31], *p, *cached; | |
cafe5635 KO |
1067 | ssize_t ret; |
1068 | ||
42bc47b3 KC |
1069 | cached = p = vmalloc(array_size(sizeof(uint16_t), |
1070 | ca->sb.nbuckets)); | |
cafe5635 KO |
1071 | if (!p) |
1072 | return -ENOMEM; | |
1073 | ||
1074 | mutex_lock(&ca->set->bucket_lock); | |
15754020 KO |
1075 | for_each_bucket(b, ca) { |
1076 | if (!GC_SECTORS_USED(b)) | |
1077 | unused++; | |
1078 | if (GC_MARK(b) == GC_MARK_RECLAIMABLE) | |
1079 | available++; | |
1080 | if (GC_MARK(b) == GC_MARK_DIRTY) | |
1081 | dirty++; | |
1082 | if (GC_MARK(b) == GC_MARK_METADATA) | |
1083 | meta++; | |
1084 | } | |
1085 | ||
cafe5635 KO |
1086 | for (i = ca->sb.first_bucket; i < n; i++) |
1087 | p[i] = ca->buckets[i].prio; | |
1088 | mutex_unlock(&ca->set->bucket_lock); | |
1089 | ||
58f913dc | 1090 | sort(p, n, sizeof(uint16_t), __bch_cache_cmp, NULL); |
cafe5635 KO |
1091 | |
1092 | while (n && | |
1093 | !cached[n - 1]) | |
1094 | --n; | |
1095 | ||
cafe5635 | 1096 | while (cached < p + n && |
6751c1e3 JP |
1097 | *cached == BTREE_PRIO) { |
1098 | cached++; | |
1099 | n--; | |
1100 | } | |
cafe5635 KO |
1101 | |
1102 | for (i = 0; i < n; i++) | |
1103 | sum += INITIAL_PRIO - cached[i]; | |
1104 | ||
1105 | if (n) | |
1106 | do_div(sum, n); | |
1107 | ||
bbc77aa7 KO |
1108 | for (i = 0; i < ARRAY_SIZE(q); i++) |
1109 | q[i] = INITIAL_PRIO - cached[n * (i + 1) / | |
1110 | (ARRAY_SIZE(q) + 1)]; | |
cafe5635 KO |
1111 | |
1112 | vfree(p); | |
1113 | ||
bbc77aa7 KO |
1114 | ret = scnprintf(buf, PAGE_SIZE, |
1115 | "Unused: %zu%%\n" | |
15754020 KO |
1116 | "Clean: %zu%%\n" |
1117 | "Dirty: %zu%%\n" | |
bbc77aa7 KO |
1118 | "Metadata: %zu%%\n" |
1119 | "Average: %llu\n" | |
1120 | "Sectors per Q: %zu\n" | |
1121 | "Quantiles: [", | |
1122 | unused * 100 / (size_t) ca->sb.nbuckets, | |
15754020 KO |
1123 | available * 100 / (size_t) ca->sb.nbuckets, |
1124 | dirty * 100 / (size_t) ca->sb.nbuckets, | |
1125 | meta * 100 / (size_t) ca->sb.nbuckets, sum, | |
bbc77aa7 KO |
1126 | n * ca->sb.bucket_size / (ARRAY_SIZE(q) + 1)); |
1127 | ||
1128 | for (i = 0; i < ARRAY_SIZE(q); i++) | |
1129 | ret += scnprintf(buf + ret, PAGE_SIZE - ret, | |
1130 | "%u ", q[i]); | |
1131 | ret--; | |
1132 | ||
1133 | ret += scnprintf(buf + ret, PAGE_SIZE - ret, "]\n"); | |
1134 | ||
cafe5635 KO |
1135 | return ret; |
1136 | } | |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | SHOW_LOCKED(bch_cache) | |
1141 | ||
1142 | STORE(__bch_cache) | |
1143 | { | |
1144 | struct cache *ca = container_of(kobj, struct cache, kobj); | |
ce4c3e19 | 1145 | ssize_t v; |
cafe5635 | 1146 | |
a59ff6cc CL |
1147 | /* no user space access if system is rebooting */ |
1148 | if (bcache_is_reboot) | |
1149 | return -EBUSY; | |
1150 | ||
cafe5635 KO |
1151 | if (attr == &sysfs_discard) { |
1152 | bool v = strtoul_or_return(buf); | |
1153 | ||
1154 | if (blk_queue_discard(bdev_get_queue(ca->bdev))) | |
1155 | ca->discard = v; | |
1156 | ||
1157 | if (v != CACHE_DISCARD(&ca->sb)) { | |
1158 | SET_CACHE_DISCARD(&ca->sb, v); | |
1159 | bcache_write_super(ca->set); | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | if (attr == &sysfs_cache_replacement_policy) { | |
20621fed | 1164 | v = __sysfs_match_string(cache_replacement_policies, -1, buf); |
cafe5635 KO |
1165 | if (v < 0) |
1166 | return v; | |
1167 | ||
6f10f7d1 | 1168 | if ((unsigned int) v != CACHE_REPLACEMENT(&ca->sb)) { |
cafe5635 KO |
1169 | mutex_lock(&ca->set->bucket_lock); |
1170 | SET_CACHE_REPLACEMENT(&ca->sb, v); | |
1171 | mutex_unlock(&ca->set->bucket_lock); | |
1172 | ||
1173 | bcache_write_super(ca->set); | |
1174 | } | |
1175 | } | |
1176 | ||
cafe5635 KO |
1177 | if (attr == &sysfs_clear_stats) { |
1178 | atomic_long_set(&ca->sectors_written, 0); | |
1179 | atomic_long_set(&ca->btree_sectors_written, 0); | |
1180 | atomic_long_set(&ca->meta_sectors_written, 0); | |
1181 | atomic_set(&ca->io_count, 0); | |
1182 | atomic_set(&ca->io_errors, 0); | |
1183 | } | |
1184 | ||
1185 | return size; | |
1186 | } | |
1187 | STORE_LOCKED(bch_cache) | |
1188 | ||
fa97cb84 | 1189 | static struct attribute *bch_cache_attrs[] = { |
cafe5635 KO |
1190 | &sysfs_bucket_size, |
1191 | &sysfs_block_size, | |
1192 | &sysfs_nbuckets, | |
1193 | &sysfs_priority_stats, | |
1194 | &sysfs_discard, | |
1195 | &sysfs_written, | |
1196 | &sysfs_btree_written, | |
1197 | &sysfs_metadata_written, | |
1198 | &sysfs_io_errors, | |
1199 | &sysfs_clear_stats, | |
cafe5635 KO |
1200 | &sysfs_cache_replacement_policy, |
1201 | NULL | |
1202 | }; | |
fa97cb84 | 1203 | ATTRIBUTE_GROUPS(bch_cache); |
cafe5635 | 1204 | KTYPE(bch_cache); |