Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
8324aa91 JA |
2 | /* |
3 | * Functions related to sysfs handling | |
4 | */ | |
5 | #include <linux/kernel.h> | |
5a0e3ad6 | 6 | #include <linux/slab.h> |
8324aa91 JA |
7 | #include <linux/module.h> |
8 | #include <linux/bio.h> | |
9 | #include <linux/blkdev.h> | |
66114cad | 10 | #include <linux/backing-dev.h> |
8324aa91 | 11 | #include <linux/blktrace_api.h> |
85e0cbbb | 12 | #include <linux/debugfs.h> |
8324aa91 JA |
13 | |
14 | #include "blk.h" | |
3edcc0ce | 15 | #include "blk-mq.h" |
d173a251 | 16 | #include "blk-mq-debugfs.h" |
2aa7745b | 17 | #include "blk-mq-sched.h" |
0bc65bd4 | 18 | #include "blk-rq-qos.h" |
87760e5e | 19 | #include "blk-wbt.h" |
672fdcf0 | 20 | #include "blk-cgroup.h" |
a7b36ee6 | 21 | #include "blk-throttle.h" |
8324aa91 JA |
22 | |
23 | struct queue_sysfs_entry { | |
24 | struct attribute attr; | |
25 | ssize_t (*show)(struct request_queue *, char *); | |
26 | ssize_t (*store)(struct request_queue *, const char *, size_t); | |
27 | }; | |
28 | ||
29 | static ssize_t | |
9cb308ce | 30 | queue_var_show(unsigned long var, char *page) |
8324aa91 | 31 | { |
9cb308ce | 32 | return sprintf(page, "%lu\n", var); |
8324aa91 JA |
33 | } |
34 | ||
35 | static ssize_t | |
36 | queue_var_store(unsigned long *var, const char *page, size_t count) | |
37 | { | |
b1f3b64d DR |
38 | int err; |
39 | unsigned long v; | |
40 | ||
ed751e68 | 41 | err = kstrtoul(page, 10, &v); |
b1f3b64d DR |
42 | if (err || v > UINT_MAX) |
43 | return -EINVAL; | |
44 | ||
45 | *var = v; | |
8324aa91 | 46 | |
8324aa91 JA |
47 | return count; |
48 | } | |
49 | ||
50 | static ssize_t queue_requests_show(struct request_queue *q, char *page) | |
51 | { | |
28af7428 | 52 | return queue_var_show(q->nr_requests, page); |
8324aa91 JA |
53 | } |
54 | ||
55 | static ssize_t | |
56 | queue_requests_store(struct request_queue *q, const char *page, size_t count) | |
57 | { | |
8324aa91 | 58 | unsigned long nr; |
e3a2b3f9 | 59 | int ret, err; |
b8a9ae77 | 60 | |
344e9ffc | 61 | if (!queue_is_mq(q)) |
b8a9ae77 JA |
62 | return -EINVAL; |
63 | ||
64 | ret = queue_var_store(&nr, page, count); | |
b1f3b64d DR |
65 | if (ret < 0) |
66 | return ret; | |
67 | ||
8324aa91 JA |
68 | if (nr < BLKDEV_MIN_RQ) |
69 | nr = BLKDEV_MIN_RQ; | |
70 | ||
a1ce35fa | 71 | err = blk_mq_update_nr_requests(q, nr); |
e3a2b3f9 JA |
72 | if (err) |
73 | return err; | |
74 | ||
8324aa91 JA |
75 | return ret; |
76 | } | |
77 | ||
78 | static ssize_t queue_ra_show(struct request_queue *q, char *page) | |
79 | { | |
edb0872f | 80 | unsigned long ra_kb; |
8324aa91 | 81 | |
d152c682 | 82 | if (!q->disk) |
edb0872f | 83 | return -EINVAL; |
d152c682 | 84 | ra_kb = q->disk->bdi->ra_pages << (PAGE_SHIFT - 10); |
8c390ff9 | 85 | return queue_var_show(ra_kb, page); |
8324aa91 JA |
86 | } |
87 | ||
88 | static ssize_t | |
89 | queue_ra_store(struct request_queue *q, const char *page, size_t count) | |
90 | { | |
91 | unsigned long ra_kb; | |
edb0872f | 92 | ssize_t ret; |
8324aa91 | 93 | |
d152c682 | 94 | if (!q->disk) |
edb0872f CH |
95 | return -EINVAL; |
96 | ret = queue_var_store(&ra_kb, page, count); | |
b1f3b64d DR |
97 | if (ret < 0) |
98 | return ret; | |
d152c682 | 99 | q->disk->bdi->ra_pages = ra_kb >> (PAGE_SHIFT - 10); |
8324aa91 JA |
100 | return ret; |
101 | } | |
102 | ||
103 | static ssize_t queue_max_sectors_show(struct request_queue *q, char *page) | |
104 | { | |
ae03bf63 | 105 | int max_sectors_kb = queue_max_sectors(q) >> 1; |
8324aa91 | 106 | |
8c390ff9 | 107 | return queue_var_show(max_sectors_kb, page); |
8324aa91 JA |
108 | } |
109 | ||
c77a5710 MP |
110 | static ssize_t queue_max_segments_show(struct request_queue *q, char *page) |
111 | { | |
8c390ff9 | 112 | return queue_var_show(queue_max_segments(q), page); |
c77a5710 MP |
113 | } |
114 | ||
1e739730 CH |
115 | static ssize_t queue_max_discard_segments_show(struct request_queue *q, |
116 | char *page) | |
117 | { | |
8c390ff9 | 118 | return queue_var_show(queue_max_discard_segments(q), page); |
1e739730 CH |
119 | } |
120 | ||
13f05c8d MP |
121 | static ssize_t queue_max_integrity_segments_show(struct request_queue *q, char *page) |
122 | { | |
8c390ff9 | 123 | return queue_var_show(q->limits.max_integrity_segments, page); |
13f05c8d MP |
124 | } |
125 | ||
c77a5710 MP |
126 | static ssize_t queue_max_segment_size_show(struct request_queue *q, char *page) |
127 | { | |
8c390ff9 | 128 | return queue_var_show(queue_max_segment_size(q), page); |
c77a5710 MP |
129 | } |
130 | ||
e1defc4f | 131 | static ssize_t queue_logical_block_size_show(struct request_queue *q, char *page) |
e68b903c | 132 | { |
e1defc4f | 133 | return queue_var_show(queue_logical_block_size(q), page); |
e68b903c MP |
134 | } |
135 | ||
c72758f3 MP |
136 | static ssize_t queue_physical_block_size_show(struct request_queue *q, char *page) |
137 | { | |
138 | return queue_var_show(queue_physical_block_size(q), page); | |
139 | } | |
140 | ||
87caf97c HR |
141 | static ssize_t queue_chunk_sectors_show(struct request_queue *q, char *page) |
142 | { | |
143 | return queue_var_show(q->limits.chunk_sectors, page); | |
144 | } | |
145 | ||
c72758f3 MP |
146 | static ssize_t queue_io_min_show(struct request_queue *q, char *page) |
147 | { | |
148 | return queue_var_show(queue_io_min(q), page); | |
149 | } | |
150 | ||
151 | static ssize_t queue_io_opt_show(struct request_queue *q, char *page) | |
152 | { | |
153 | return queue_var_show(queue_io_opt(q), page); | |
e68b903c MP |
154 | } |
155 | ||
86b37281 MP |
156 | static ssize_t queue_discard_granularity_show(struct request_queue *q, char *page) |
157 | { | |
158 | return queue_var_show(q->limits.discard_granularity, page); | |
159 | } | |
160 | ||
0034af03 JA |
161 | static ssize_t queue_discard_max_hw_show(struct request_queue *q, char *page) |
162 | { | |
0034af03 | 163 | |
18f922d0 A |
164 | return sprintf(page, "%llu\n", |
165 | (unsigned long long)q->limits.max_hw_discard_sectors << 9); | |
0034af03 JA |
166 | } |
167 | ||
86b37281 MP |
168 | static ssize_t queue_discard_max_show(struct request_queue *q, char *page) |
169 | { | |
a934a00a MP |
170 | return sprintf(page, "%llu\n", |
171 | (unsigned long long)q->limits.max_discard_sectors << 9); | |
86b37281 MP |
172 | } |
173 | ||
0034af03 JA |
174 | static ssize_t queue_discard_max_store(struct request_queue *q, |
175 | const char *page, size_t count) | |
176 | { | |
177 | unsigned long max_discard; | |
178 | ssize_t ret = queue_var_store(&max_discard, page, count); | |
179 | ||
180 | if (ret < 0) | |
181 | return ret; | |
182 | ||
183 | if (max_discard & (q->limits.discard_granularity - 1)) | |
184 | return -EINVAL; | |
185 | ||
186 | max_discard >>= 9; | |
187 | if (max_discard > UINT_MAX) | |
188 | return -EINVAL; | |
189 | ||
190 | if (max_discard > q->limits.max_hw_discard_sectors) | |
191 | max_discard = q->limits.max_hw_discard_sectors; | |
192 | ||
193 | q->limits.max_discard_sectors = max_discard; | |
194 | return ret; | |
195 | } | |
196 | ||
98262f27 MP |
197 | static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *page) |
198 | { | |
48920ff2 | 199 | return queue_var_show(0, page); |
98262f27 MP |
200 | } |
201 | ||
4363ac7c MP |
202 | static ssize_t queue_write_same_max_show(struct request_queue *q, char *page) |
203 | { | |
73bd66d9 | 204 | return queue_var_show(0, page); |
4363ac7c MP |
205 | } |
206 | ||
a6f0788e CK |
207 | static ssize_t queue_write_zeroes_max_show(struct request_queue *q, char *page) |
208 | { | |
209 | return sprintf(page, "%llu\n", | |
210 | (unsigned long long)q->limits.max_write_zeroes_sectors << 9); | |
211 | } | |
4363ac7c | 212 | |
a805a4fa DLM |
213 | static ssize_t queue_zone_write_granularity_show(struct request_queue *q, |
214 | char *page) | |
215 | { | |
216 | return queue_var_show(queue_zone_write_granularity(q), page); | |
217 | } | |
218 | ||
0512a75b KB |
219 | static ssize_t queue_zone_append_max_show(struct request_queue *q, char *page) |
220 | { | |
221 | unsigned long long max_sectors = q->limits.max_zone_append_sectors; | |
222 | ||
223 | return sprintf(page, "%llu\n", max_sectors << SECTOR_SHIFT); | |
224 | } | |
225 | ||
8324aa91 JA |
226 | static ssize_t |
227 | queue_max_sectors_store(struct request_queue *q, const char *page, size_t count) | |
228 | { | |
c9c77418 KB |
229 | unsigned long var; |
230 | unsigned int max_sectors_kb, | |
ae03bf63 | 231 | max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1, |
09cbfeaf | 232 | page_kb = 1 << (PAGE_SHIFT - 10); |
c9c77418 | 233 | ssize_t ret = queue_var_store(&var, page, count); |
8324aa91 | 234 | |
b1f3b64d DR |
235 | if (ret < 0) |
236 | return ret; | |
237 | ||
c9c77418 KB |
238 | max_sectors_kb = (unsigned int)var; |
239 | max_hw_sectors_kb = min_not_zero(max_hw_sectors_kb, | |
ca369d51 | 240 | q->limits.max_dev_sectors >> 1); |
c9c77418 KB |
241 | if (max_sectors_kb == 0) { |
242 | q->limits.max_user_sectors = 0; | |
243 | max_sectors_kb = min(max_hw_sectors_kb, | |
d6b9f4e6 | 244 | BLK_DEF_MAX_SECTORS_CAP >> 1); |
c9c77418 KB |
245 | } else { |
246 | if (max_sectors_kb > max_hw_sectors_kb || | |
247 | max_sectors_kb < page_kb) | |
248 | return -EINVAL; | |
249 | q->limits.max_user_sectors = max_sectors_kb << 1; | |
250 | } | |
7c239517 | 251 | |
0d945c1f | 252 | spin_lock_irq(&q->queue_lock); |
c295fc05 | 253 | q->limits.max_sectors = max_sectors_kb << 1; |
d152c682 CH |
254 | if (q->disk) |
255 | q->disk->bdi->io_pages = max_sectors_kb >> (PAGE_SHIFT - 10); | |
0d945c1f | 256 | spin_unlock_irq(&q->queue_lock); |
8324aa91 JA |
257 | |
258 | return ret; | |
259 | } | |
260 | ||
261 | static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page) | |
262 | { | |
ae03bf63 | 263 | int max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1; |
8324aa91 | 264 | |
8c390ff9 | 265 | return queue_var_show(max_hw_sectors_kb, page); |
8324aa91 JA |
266 | } |
267 | ||
28af7428 MG |
268 | static ssize_t queue_virt_boundary_mask_show(struct request_queue *q, char *page) |
269 | { | |
8c390ff9 | 270 | return queue_var_show(q->limits.virt_boundary_mask, page); |
28af7428 MG |
271 | } |
272 | ||
3850e13f KB |
273 | static ssize_t queue_dma_alignment_show(struct request_queue *q, char *page) |
274 | { | |
275 | return queue_var_show(queue_dma_alignment(q), page); | |
276 | } | |
277 | ||
956bcb7c JA |
278 | #define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \ |
279 | static ssize_t \ | |
fc93fe14 | 280 | queue_##name##_show(struct request_queue *q, char *page) \ |
956bcb7c JA |
281 | { \ |
282 | int bit; \ | |
283 | bit = test_bit(QUEUE_FLAG_##flag, &q->queue_flags); \ | |
284 | return queue_var_show(neg ? !bit : bit, page); \ | |
285 | } \ | |
286 | static ssize_t \ | |
fc93fe14 | 287 | queue_##name##_store(struct request_queue *q, const char *page, size_t count) \ |
956bcb7c JA |
288 | { \ |
289 | unsigned long val; \ | |
290 | ssize_t ret; \ | |
291 | ret = queue_var_store(&val, page, count); \ | |
c678ef52 AB |
292 | if (ret < 0) \ |
293 | return ret; \ | |
956bcb7c JA |
294 | if (neg) \ |
295 | val = !val; \ | |
296 | \ | |
956bcb7c | 297 | if (val) \ |
8814ce8a | 298 | blk_queue_flag_set(QUEUE_FLAG_##flag, q); \ |
956bcb7c | 299 | else \ |
8814ce8a | 300 | blk_queue_flag_clear(QUEUE_FLAG_##flag, q); \ |
956bcb7c | 301 | return ret; \ |
1308835f BZ |
302 | } |
303 | ||
956bcb7c JA |
304 | QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1); |
305 | QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0); | |
306 | QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0); | |
1cb039f3 | 307 | QUEUE_SYSFS_BIT_FNS(stable_writes, STABLE_WRITES, 0); |
956bcb7c | 308 | #undef QUEUE_SYSFS_BIT_FNS |
1308835f | 309 | |
797476b8 DLM |
310 | static ssize_t queue_zoned_show(struct request_queue *q, char *page) |
311 | { | |
7437bb73 | 312 | if (blk_queue_is_zoned(q)) |
797476b8 | 313 | return sprintf(page, "host-managed\n"); |
7437bb73 | 314 | return sprintf(page, "none\n"); |
797476b8 DLM |
315 | } |
316 | ||
965b652e DLM |
317 | static ssize_t queue_nr_zones_show(struct request_queue *q, char *page) |
318 | { | |
d86e716a | 319 | return queue_var_show(disk_nr_zones(q->disk), page); |
965b652e DLM |
320 | } |
321 | ||
e15864f8 NC |
322 | static ssize_t queue_max_open_zones_show(struct request_queue *q, char *page) |
323 | { | |
1dc01720 | 324 | return queue_var_show(bdev_max_open_zones(q->disk->part0), page); |
e15864f8 NC |
325 | } |
326 | ||
659bf827 NC |
327 | static ssize_t queue_max_active_zones_show(struct request_queue *q, char *page) |
328 | { | |
1dc01720 | 329 | return queue_var_show(bdev_max_active_zones(q->disk->part0), page); |
659bf827 NC |
330 | } |
331 | ||
ac9fafa1 AB |
332 | static ssize_t queue_nomerges_show(struct request_queue *q, char *page) |
333 | { | |
488991e2 AB |
334 | return queue_var_show((blk_queue_nomerges(q) << 1) | |
335 | blk_queue_noxmerges(q), page); | |
ac9fafa1 AB |
336 | } |
337 | ||
338 | static ssize_t queue_nomerges_store(struct request_queue *q, const char *page, | |
339 | size_t count) | |
340 | { | |
341 | unsigned long nm; | |
342 | ssize_t ret = queue_var_store(&nm, page, count); | |
343 | ||
b1f3b64d DR |
344 | if (ret < 0) |
345 | return ret; | |
346 | ||
57d74df9 CH |
347 | blk_queue_flag_clear(QUEUE_FLAG_NOMERGES, q); |
348 | blk_queue_flag_clear(QUEUE_FLAG_NOXMERGES, q); | |
488991e2 | 349 | if (nm == 2) |
57d74df9 | 350 | blk_queue_flag_set(QUEUE_FLAG_NOMERGES, q); |
488991e2 | 351 | else if (nm) |
57d74df9 | 352 | blk_queue_flag_set(QUEUE_FLAG_NOXMERGES, q); |
1308835f | 353 | |
ac9fafa1 AB |
354 | return ret; |
355 | } | |
356 | ||
c7c22e4d JA |
357 | static ssize_t queue_rq_affinity_show(struct request_queue *q, char *page) |
358 | { | |
9cb308ce | 359 | bool set = test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags); |
5757a6d7 | 360 | bool force = test_bit(QUEUE_FLAG_SAME_FORCE, &q->queue_flags); |
c7c22e4d | 361 | |
5757a6d7 | 362 | return queue_var_show(set << force, page); |
c7c22e4d JA |
363 | } |
364 | ||
365 | static ssize_t | |
366 | queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count) | |
367 | { | |
368 | ssize_t ret = -EINVAL; | |
0a06ff06 | 369 | #ifdef CONFIG_SMP |
c7c22e4d JA |
370 | unsigned long val; |
371 | ||
372 | ret = queue_var_store(&val, page, count); | |
b1f3b64d DR |
373 | if (ret < 0) |
374 | return ret; | |
375 | ||
e8037d49 | 376 | if (val == 2) { |
57d74df9 CH |
377 | blk_queue_flag_set(QUEUE_FLAG_SAME_COMP, q); |
378 | blk_queue_flag_set(QUEUE_FLAG_SAME_FORCE, q); | |
e8037d49 | 379 | } else if (val == 1) { |
57d74df9 CH |
380 | blk_queue_flag_set(QUEUE_FLAG_SAME_COMP, q); |
381 | blk_queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q); | |
e8037d49 | 382 | } else if (val == 0) { |
57d74df9 CH |
383 | blk_queue_flag_clear(QUEUE_FLAG_SAME_COMP, q); |
384 | blk_queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q); | |
5757a6d7 | 385 | } |
c7c22e4d JA |
386 | #endif |
387 | return ret; | |
388 | } | |
8324aa91 | 389 | |
06426adf JA |
390 | static ssize_t queue_poll_delay_show(struct request_queue *q, char *page) |
391 | { | |
54bdd67d | 392 | return sprintf(page, "%d\n", -1); |
06426adf JA |
393 | } |
394 | ||
395 | static ssize_t queue_poll_delay_store(struct request_queue *q, const char *page, | |
396 | size_t count) | |
397 | { | |
64f1c21e | 398 | return count; |
06426adf JA |
399 | } |
400 | ||
05229bee JA |
401 | static ssize_t queue_poll_show(struct request_queue *q, char *page) |
402 | { | |
403 | return queue_var_show(test_bit(QUEUE_FLAG_POLL, &q->queue_flags), page); | |
404 | } | |
405 | ||
406 | static ssize_t queue_poll_store(struct request_queue *q, const char *page, | |
407 | size_t count) | |
408 | { | |
a614dd22 | 409 | if (!test_bit(QUEUE_FLAG_POLL, &q->queue_flags)) |
05229bee | 410 | return -EINVAL; |
a614dd22 CH |
411 | pr_info_ratelimited("writes to the poll attribute are ignored.\n"); |
412 | pr_info_ratelimited("please use driver specific parameters instead.\n"); | |
413 | return count; | |
05229bee JA |
414 | } |
415 | ||
65cd1d13 WZ |
416 | static ssize_t queue_io_timeout_show(struct request_queue *q, char *page) |
417 | { | |
418 | return sprintf(page, "%u\n", jiffies_to_msecs(q->rq_timeout)); | |
419 | } | |
420 | ||
421 | static ssize_t queue_io_timeout_store(struct request_queue *q, const char *page, | |
422 | size_t count) | |
423 | { | |
424 | unsigned int val; | |
425 | int err; | |
426 | ||
427 | err = kstrtou32(page, 10, &val); | |
428 | if (err || val == 0) | |
429 | return -EINVAL; | |
430 | ||
431 | blk_queue_rq_timeout(q, msecs_to_jiffies(val)); | |
432 | ||
433 | return count; | |
434 | } | |
435 | ||
93e9d8e8 JA |
436 | static ssize_t queue_wc_show(struct request_queue *q, char *page) |
437 | { | |
438 | if (test_bit(QUEUE_FLAG_WC, &q->queue_flags)) | |
439 | return sprintf(page, "write back\n"); | |
440 | ||
441 | return sprintf(page, "write through\n"); | |
442 | } | |
443 | ||
444 | static ssize_t queue_wc_store(struct request_queue *q, const char *page, | |
445 | size_t count) | |
446 | { | |
43c9835b CH |
447 | if (!strncmp(page, "write back", 10)) { |
448 | if (!test_bit(QUEUE_FLAG_HW_WC, &q->queue_flags)) | |
449 | return -EINVAL; | |
c4e21bcd | 450 | blk_queue_flag_set(QUEUE_FLAG_WC, q); |
43c9835b CH |
451 | } else if (!strncmp(page, "write through", 13) || |
452 | !strncmp(page, "none", 4)) { | |
8814ce8a | 453 | blk_queue_flag_clear(QUEUE_FLAG_WC, q); |
43c9835b | 454 | } else { |
c4e21bcd | 455 | return -EINVAL; |
43c9835b | 456 | } |
93e9d8e8 JA |
457 | |
458 | return count; | |
459 | } | |
460 | ||
6fcefbe5 KO |
461 | static ssize_t queue_fua_show(struct request_queue *q, char *page) |
462 | { | |
463 | return sprintf(page, "%u\n", test_bit(QUEUE_FLAG_FUA, &q->queue_flags)); | |
464 | } | |
465 | ||
ea6ca600 YK |
466 | static ssize_t queue_dax_show(struct request_queue *q, char *page) |
467 | { | |
468 | return queue_var_show(blk_queue_dax(q), page); | |
469 | } | |
470 | ||
35626147 CH |
471 | #define QUEUE_RO_ENTRY(_prefix, _name) \ |
472 | static struct queue_sysfs_entry _prefix##_entry = { \ | |
473 | .attr = { .name = _name, .mode = 0444 }, \ | |
474 | .show = _prefix##_show, \ | |
475 | }; | |
476 | ||
477 | #define QUEUE_RW_ENTRY(_prefix, _name) \ | |
478 | static struct queue_sysfs_entry _prefix##_entry = { \ | |
479 | .attr = { .name = _name, .mode = 0644 }, \ | |
480 | .show = _prefix##_show, \ | |
481 | .store = _prefix##_store, \ | |
482 | }; | |
483 | ||
484 | QUEUE_RW_ENTRY(queue_requests, "nr_requests"); | |
485 | QUEUE_RW_ENTRY(queue_ra, "read_ahead_kb"); | |
486 | QUEUE_RW_ENTRY(queue_max_sectors, "max_sectors_kb"); | |
487 | QUEUE_RO_ENTRY(queue_max_hw_sectors, "max_hw_sectors_kb"); | |
488 | QUEUE_RO_ENTRY(queue_max_segments, "max_segments"); | |
489 | QUEUE_RO_ENTRY(queue_max_integrity_segments, "max_integrity_segments"); | |
490 | QUEUE_RO_ENTRY(queue_max_segment_size, "max_segment_size"); | |
491 | QUEUE_RW_ENTRY(elv_iosched, "scheduler"); | |
492 | ||
493 | QUEUE_RO_ENTRY(queue_logical_block_size, "logical_block_size"); | |
494 | QUEUE_RO_ENTRY(queue_physical_block_size, "physical_block_size"); | |
495 | QUEUE_RO_ENTRY(queue_chunk_sectors, "chunk_sectors"); | |
496 | QUEUE_RO_ENTRY(queue_io_min, "minimum_io_size"); | |
497 | QUEUE_RO_ENTRY(queue_io_opt, "optimal_io_size"); | |
498 | ||
499 | QUEUE_RO_ENTRY(queue_max_discard_segments, "max_discard_segments"); | |
500 | QUEUE_RO_ENTRY(queue_discard_granularity, "discard_granularity"); | |
501 | QUEUE_RO_ENTRY(queue_discard_max_hw, "discard_max_hw_bytes"); | |
502 | QUEUE_RW_ENTRY(queue_discard_max, "discard_max_bytes"); | |
503 | QUEUE_RO_ENTRY(queue_discard_zeroes_data, "discard_zeroes_data"); | |
504 | ||
505 | QUEUE_RO_ENTRY(queue_write_same_max, "write_same_max_bytes"); | |
506 | QUEUE_RO_ENTRY(queue_write_zeroes_max, "write_zeroes_max_bytes"); | |
507 | QUEUE_RO_ENTRY(queue_zone_append_max, "zone_append_max_bytes"); | |
a805a4fa | 508 | QUEUE_RO_ENTRY(queue_zone_write_granularity, "zone_write_granularity"); |
35626147 CH |
509 | |
510 | QUEUE_RO_ENTRY(queue_zoned, "zoned"); | |
511 | QUEUE_RO_ENTRY(queue_nr_zones, "nr_zones"); | |
512 | QUEUE_RO_ENTRY(queue_max_open_zones, "max_open_zones"); | |
513 | QUEUE_RO_ENTRY(queue_max_active_zones, "max_active_zones"); | |
514 | ||
515 | QUEUE_RW_ENTRY(queue_nomerges, "nomerges"); | |
516 | QUEUE_RW_ENTRY(queue_rq_affinity, "rq_affinity"); | |
517 | QUEUE_RW_ENTRY(queue_poll, "io_poll"); | |
518 | QUEUE_RW_ENTRY(queue_poll_delay, "io_poll_delay"); | |
519 | QUEUE_RW_ENTRY(queue_wc, "write_cache"); | |
520 | QUEUE_RO_ENTRY(queue_fua, "fua"); | |
521 | QUEUE_RO_ENTRY(queue_dax, "dax"); | |
522 | QUEUE_RW_ENTRY(queue_io_timeout, "io_timeout"); | |
28af7428 | 523 | QUEUE_RO_ENTRY(queue_virt_boundary_mask, "virt_boundary_mask"); |
3850e13f | 524 | QUEUE_RO_ENTRY(queue_dma_alignment, "dma_alignment"); |
8324aa91 | 525 | |
35626147 CH |
526 | #ifdef CONFIG_BLK_DEV_THROTTLING_LOW |
527 | QUEUE_RW_ENTRY(blk_throtl_sample_time, "throttle_sample_time"); | |
528 | #endif | |
8324aa91 | 529 | |
35626147 | 530 | /* legacy alias for logical_block_size: */ |
e68b903c | 531 | static struct queue_sysfs_entry queue_hw_sector_size_entry = { |
5657a819 | 532 | .attr = {.name = "hw_sector_size", .mode = 0444 }, |
e1defc4f MP |
533 | .show = queue_logical_block_size_show, |
534 | }; | |
535 | ||
fc93fe14 CH |
536 | QUEUE_RW_ENTRY(queue_nonrot, "rotational"); |
537 | QUEUE_RW_ENTRY(queue_iostats, "iostats"); | |
538 | QUEUE_RW_ENTRY(queue_random, "add_random"); | |
1cb039f3 | 539 | QUEUE_RW_ENTRY(queue_stable_writes, "stable_writes"); |
e2e1a148 | 540 | |
645a829e YK |
541 | #ifdef CONFIG_BLK_WBT |
542 | static ssize_t queue_var_store64(s64 *var, const char *page) | |
543 | { | |
544 | int err; | |
545 | s64 v; | |
546 | ||
547 | err = kstrtos64(page, 10, &v); | |
548 | if (err < 0) | |
549 | return err; | |
550 | ||
551 | *var = v; | |
552 | return 0; | |
553 | } | |
554 | ||
555 | static ssize_t queue_wb_lat_show(struct request_queue *q, char *page) | |
556 | { | |
557 | if (!wbt_rq_qos(q)) | |
558 | return -EINVAL; | |
559 | ||
560 | if (wbt_disabled(q)) | |
561 | return sprintf(page, "0\n"); | |
562 | ||
563 | return sprintf(page, "%llu\n", div_u64(wbt_get_min_lat(q), 1000)); | |
564 | } | |
565 | ||
566 | static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page, | |
567 | size_t count) | |
568 | { | |
569 | struct rq_qos *rqos; | |
570 | ssize_t ret; | |
571 | s64 val; | |
572 | ||
573 | ret = queue_var_store64(&val, page); | |
574 | if (ret < 0) | |
575 | return ret; | |
576 | if (val < -1) | |
577 | return -EINVAL; | |
578 | ||
579 | rqos = wbt_rq_qos(q); | |
580 | if (!rqos) { | |
581 | ret = wbt_init(q->disk); | |
582 | if (ret) | |
583 | return ret; | |
584 | } | |
585 | ||
586 | if (val == -1) | |
587 | val = wbt_default_latency_nsec(q); | |
588 | else if (val >= 0) | |
589 | val *= 1000ULL; | |
590 | ||
591 | if (wbt_get_min_lat(q) == val) | |
592 | return count; | |
593 | ||
594 | /* | |
595 | * Ensure that the queue is idled, in case the latency update | |
596 | * ends up either enabling or disabling wbt completely. We can't | |
597 | * have IO inflight if that happens. | |
598 | */ | |
599 | blk_mq_freeze_queue(q); | |
600 | blk_mq_quiesce_queue(q); | |
601 | ||
602 | wbt_set_min_lat(q, val); | |
603 | ||
604 | blk_mq_unquiesce_queue(q); | |
605 | blk_mq_unfreeze_queue(q); | |
606 | ||
607 | return count; | |
608 | } | |
609 | ||
610 | QUEUE_RW_ENTRY(queue_wb_lat, "wbt_lat_usec"); | |
611 | #endif | |
612 | ||
3649ff0a | 613 | /* Common attributes for bio-based and request-based queues. */ |
4d25339e | 614 | static struct attribute *queue_attrs[] = { |
8324aa91 JA |
615 | &queue_ra_entry.attr, |
616 | &queue_max_hw_sectors_entry.attr, | |
617 | &queue_max_sectors_entry.attr, | |
c77a5710 | 618 | &queue_max_segments_entry.attr, |
1e739730 | 619 | &queue_max_discard_segments_entry.attr, |
13f05c8d | 620 | &queue_max_integrity_segments_entry.attr, |
c77a5710 | 621 | &queue_max_segment_size_entry.attr, |
e68b903c | 622 | &queue_hw_sector_size_entry.attr, |
e1defc4f | 623 | &queue_logical_block_size_entry.attr, |
c72758f3 | 624 | &queue_physical_block_size_entry.attr, |
87caf97c | 625 | &queue_chunk_sectors_entry.attr, |
c72758f3 MP |
626 | &queue_io_min_entry.attr, |
627 | &queue_io_opt_entry.attr, | |
86b37281 MP |
628 | &queue_discard_granularity_entry.attr, |
629 | &queue_discard_max_entry.attr, | |
0034af03 | 630 | &queue_discard_max_hw_entry.attr, |
98262f27 | 631 | &queue_discard_zeroes_data_entry.attr, |
4363ac7c | 632 | &queue_write_same_max_entry.attr, |
a6f0788e | 633 | &queue_write_zeroes_max_entry.attr, |
0512a75b | 634 | &queue_zone_append_max_entry.attr, |
a805a4fa | 635 | &queue_zone_write_granularity_entry.attr, |
1308835f | 636 | &queue_nonrot_entry.attr, |
797476b8 | 637 | &queue_zoned_entry.attr, |
965b652e | 638 | &queue_nr_zones_entry.attr, |
e15864f8 | 639 | &queue_max_open_zones_entry.attr, |
659bf827 | 640 | &queue_max_active_zones_entry.attr, |
ac9fafa1 | 641 | &queue_nomerges_entry.attr, |
bc58ba94 | 642 | &queue_iostats_entry.attr, |
1cb039f3 | 643 | &queue_stable_writes_entry.attr, |
e2e1a148 | 644 | &queue_random_entry.attr, |
05229bee | 645 | &queue_poll_entry.attr, |
93e9d8e8 | 646 | &queue_wc_entry.attr, |
6fcefbe5 | 647 | &queue_fua_entry.attr, |
ea6ca600 | 648 | &queue_dax_entry.attr, |
06426adf | 649 | &queue_poll_delay_entry.attr, |
297e3d85 | 650 | #ifdef CONFIG_BLK_DEV_THROTTLING_LOW |
35626147 | 651 | &blk_throtl_sample_time_entry.attr, |
297e3d85 | 652 | #endif |
28af7428 | 653 | &queue_virt_boundary_mask_entry.attr, |
3850e13f | 654 | &queue_dma_alignment_entry.attr, |
8324aa91 JA |
655 | NULL, |
656 | }; | |
657 | ||
3649ff0a | 658 | /* Request-based queue attributes that are not relevant for bio-based queues. */ |
6d85ebf9 YK |
659 | static struct attribute *blk_mq_queue_attrs[] = { |
660 | &queue_requests_entry.attr, | |
661 | &elv_iosched_entry.attr, | |
662 | &queue_rq_affinity_entry.attr, | |
663 | &queue_io_timeout_entry.attr, | |
664 | #ifdef CONFIG_BLK_WBT | |
665 | &queue_wb_lat_entry.attr, | |
666 | #endif | |
667 | NULL, | |
668 | }; | |
669 | ||
4d25339e WZ |
670 | static umode_t queue_attr_visible(struct kobject *kobj, struct attribute *attr, |
671 | int n) | |
672 | { | |
2bd85221 CH |
673 | struct gendisk *disk = container_of(kobj, struct gendisk, queue_kobj); |
674 | struct request_queue *q = disk->queue; | |
4d25339e | 675 | |
659bf827 NC |
676 | if ((attr == &queue_max_open_zones_entry.attr || |
677 | attr == &queue_max_active_zones_entry.attr) && | |
e15864f8 NC |
678 | !blk_queue_is_zoned(q)) |
679 | return 0; | |
680 | ||
4d25339e WZ |
681 | return attr->mode; |
682 | } | |
683 | ||
6d85ebf9 YK |
684 | static umode_t blk_mq_queue_attr_visible(struct kobject *kobj, |
685 | struct attribute *attr, int n) | |
686 | { | |
687 | struct gendisk *disk = container_of(kobj, struct gendisk, queue_kobj); | |
688 | struct request_queue *q = disk->queue; | |
689 | ||
690 | if (!queue_is_mq(q)) | |
691 | return 0; | |
692 | ||
693 | if (attr == &queue_io_timeout_entry.attr && !q->mq_ops->timeout) | |
694 | return 0; | |
695 | ||
696 | return attr->mode; | |
697 | } | |
698 | ||
4d25339e WZ |
699 | static struct attribute_group queue_attr_group = { |
700 | .attrs = queue_attrs, | |
701 | .is_visible = queue_attr_visible, | |
702 | }; | |
703 | ||
6d85ebf9 YK |
704 | static struct attribute_group blk_mq_queue_attr_group = { |
705 | .attrs = blk_mq_queue_attrs, | |
706 | .is_visible = blk_mq_queue_attr_visible, | |
707 | }; | |
4d25339e | 708 | |
8324aa91 JA |
709 | #define to_queue(atr) container_of((atr), struct queue_sysfs_entry, attr) |
710 | ||
711 | static ssize_t | |
712 | queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
713 | { | |
714 | struct queue_sysfs_entry *entry = to_queue(attr); | |
2bd85221 CH |
715 | struct gendisk *disk = container_of(kobj, struct gendisk, queue_kobj); |
716 | struct request_queue *q = disk->queue; | |
8324aa91 JA |
717 | ssize_t res; |
718 | ||
719 | if (!entry->show) | |
720 | return -EIO; | |
721 | mutex_lock(&q->sysfs_lock); | |
8324aa91 JA |
722 | res = entry->show(q, page); |
723 | mutex_unlock(&q->sysfs_lock); | |
724 | return res; | |
725 | } | |
726 | ||
727 | static ssize_t | |
728 | queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
729 | const char *page, size_t length) | |
730 | { | |
731 | struct queue_sysfs_entry *entry = to_queue(attr); | |
2bd85221 CH |
732 | struct gendisk *disk = container_of(kobj, struct gendisk, queue_kobj); |
733 | struct request_queue *q = disk->queue; | |
8324aa91 JA |
734 | ssize_t res; |
735 | ||
736 | if (!entry->store) | |
737 | return -EIO; | |
6728cb0e | 738 | |
8324aa91 | 739 | mutex_lock(&q->sysfs_lock); |
8324aa91 JA |
740 | res = entry->store(q, page, length); |
741 | mutex_unlock(&q->sysfs_lock); | |
742 | return res; | |
743 | } | |
744 | ||
52cf25d0 | 745 | static const struct sysfs_ops queue_sysfs_ops = { |
8324aa91 JA |
746 | .show = queue_attr_show, |
747 | .store = queue_attr_store, | |
748 | }; | |
749 | ||
4a8d14bb CH |
750 | static const struct attribute_group *blk_queue_attr_groups[] = { |
751 | &queue_attr_group, | |
6d85ebf9 | 752 | &blk_mq_queue_attr_group, |
4a8d14bb CH |
753 | NULL |
754 | }; | |
755 | ||
2bd85221 CH |
756 | static void blk_queue_release(struct kobject *kobj) |
757 | { | |
758 | /* nothing to do here, all data is associated with the parent gendisk */ | |
759 | } | |
760 | ||
5f622417 | 761 | static const struct kobj_type blk_queue_ktype = { |
4a8d14bb | 762 | .default_groups = blk_queue_attr_groups, |
8324aa91 | 763 | .sysfs_ops = &queue_sysfs_ops, |
2bd85221 | 764 | .release = blk_queue_release, |
8324aa91 JA |
765 | }; |
766 | ||
6fc75f30 CH |
767 | static void blk_debugfs_remove(struct gendisk *disk) |
768 | { | |
769 | struct request_queue *q = disk->queue; | |
770 | ||
771 | mutex_lock(&q->debugfs_mutex); | |
772 | blk_trace_shutdown(q); | |
773 | debugfs_remove_recursive(q->debugfs_dir); | |
774 | q->debugfs_dir = NULL; | |
775 | q->sched_debugfs_dir = NULL; | |
776 | q->rqos_debugfs_dir = NULL; | |
777 | mutex_unlock(&q->debugfs_mutex); | |
778 | } | |
779 | ||
2c2086af BVA |
780 | /** |
781 | * blk_register_queue - register a block layer queue with sysfs | |
782 | * @disk: Disk of which the request queue should be registered with sysfs. | |
783 | */ | |
8324aa91 JA |
784 | int blk_register_queue(struct gendisk *disk) |
785 | { | |
8324aa91 | 786 | struct request_queue *q = disk->queue; |
8682b92e | 787 | int ret; |
8324aa91 | 788 | |
cecf5d87 | 789 | mutex_lock(&q->sysfs_dir_lock); |
2bd85221 CH |
790 | kobject_init(&disk->queue_kobj, &blk_queue_ktype); |
791 | ret = kobject_add(&disk->queue_kobj, &disk_to_dev(disk)->kobj, "queue"); | |
cc5c516d | 792 | if (ret < 0) |
2bd85221 | 793 | goto out_put_queue_kobj; |
8324aa91 | 794 | |
40602997 CH |
795 | if (queue_is_mq(q)) { |
796 | ret = blk_mq_sysfs_register(disk); | |
797 | if (ret) | |
2bd85221 | 798 | goto out_put_queue_kobj; |
40602997 | 799 | } |
5cf9c91b CH |
800 | mutex_lock(&q->sysfs_lock); |
801 | ||
85e0cbbb | 802 | mutex_lock(&q->debugfs_mutex); |
2bd85221 | 803 | q->debugfs_dir = debugfs_create_dir(disk->disk_name, blk_debugfs_root); |
5cf9c91b | 804 | if (queue_is_mq(q)) |
a8ecdd71 | 805 | blk_mq_debugfs_register(q); |
5cf9c91b | 806 | mutex_unlock(&q->debugfs_mutex); |
a2247f19 | 807 | |
22d0c408 | 808 | ret = disk_register_independent_access_ranges(disk); |
a2247f19 | 809 | if (ret) |
40602997 | 810 | goto out_debugfs_remove; |
a2247f19 | 811 | |
344e9ffc | 812 | if (q->elevator) { |
cecf5d87 | 813 | ret = elv_register_queue(q, false); |
a2247f19 | 814 | if (ret) |
40602997 | 815 | goto out_unregister_ia_ranges; |
8324aa91 | 816 | } |
cecf5d87 | 817 | |
450deb93 | 818 | ret = blk_crypto_sysfs_register(disk); |
20f01f16 | 819 | if (ret) |
40602997 | 820 | goto out_elv_unregister; |
20f01f16 | 821 | |
cecf5d87 | 822 | blk_queue_flag_set(QUEUE_FLAG_REGISTERED, q); |
04aad37b | 823 | wbt_enable_default(disk); |
5f6dc752 | 824 | blk_throtl_register(disk); |
cecf5d87 ML |
825 | |
826 | /* Now everything is ready and send out KOBJ_ADD uevent */ | |
2bd85221 | 827 | kobject_uevent(&disk->queue_kobj, KOBJ_ADD); |
0546858c | 828 | if (q->elevator) |
cecf5d87 ML |
829 | kobject_uevent(&q->elevator->kobj, KOBJ_ADD); |
830 | mutex_unlock(&q->sysfs_lock); | |
cecf5d87 | 831 | mutex_unlock(&q->sysfs_dir_lock); |
a72c374f ML |
832 | |
833 | /* | |
834 | * SCSI probing may synchronously create and destroy a lot of | |
835 | * request_queues for non-existent devices. Shutting down a fully | |
836 | * functional queue takes measureable wallclock time as RCU grace | |
837 | * periods are involved. To avoid excessive latency in these | |
838 | * cases, a request_queue starts out in a degraded mode which is | |
839 | * faster to shut down and is made fully functional here as | |
840 | * request_queues for non-existent devices never get registered. | |
841 | */ | |
842 | if (!blk_queue_init_done(q)) { | |
843 | blk_queue_flag_set(QUEUE_FLAG_INIT_DONE, q); | |
844 | percpu_ref_switch_to_percpu(&q->q_usage_counter); | |
845 | } | |
846 | ||
a2247f19 DLM |
847 | return ret; |
848 | ||
40602997 | 849 | out_elv_unregister: |
20f01f16 | 850 | elv_unregister_queue(q); |
40602997 | 851 | out_unregister_ia_ranges: |
a2247f19 | 852 | disk_unregister_independent_access_ranges(disk); |
40602997 CH |
853 | out_debugfs_remove: |
854 | blk_debugfs_remove(disk); | |
a2247f19 | 855 | mutex_unlock(&q->sysfs_lock); |
2bd85221 CH |
856 | out_put_queue_kobj: |
857 | kobject_put(&disk->queue_kobj); | |
40602997 | 858 | mutex_unlock(&q->sysfs_dir_lock); |
b410aff2 | 859 | return ret; |
8324aa91 JA |
860 | } |
861 | ||
2c2086af BVA |
862 | /** |
863 | * blk_unregister_queue - counterpart of blk_register_queue() | |
864 | * @disk: Disk of which the request queue should be unregistered from sysfs. | |
865 | * | |
866 | * Note: the caller is responsible for guaranteeing that this function is called | |
867 | * after blk_register_queue() has finished. | |
868 | */ | |
8324aa91 JA |
869 | void blk_unregister_queue(struct gendisk *disk) |
870 | { | |
871 | struct request_queue *q = disk->queue; | |
872 | ||
fb199746 AM |
873 | if (WARN_ON(!q)) |
874 | return; | |
875 | ||
fa70d2e2 | 876 | /* Return early if disk->queue was never registered. */ |
58c898ba | 877 | if (!blk_queue_registered(q)) |
fa70d2e2 MS |
878 | return; |
879 | ||
667257e8 | 880 | /* |
2c2086af BVA |
881 | * Since sysfs_remove_dir() prevents adding new directory entries |
882 | * before removal of existing entries starts, protect against | |
883 | * concurrent elv_iosched_store() calls. | |
667257e8 | 884 | */ |
e9a823fb | 885 | mutex_lock(&q->sysfs_lock); |
8814ce8a | 886 | blk_queue_flag_clear(QUEUE_FLAG_REGISTERED, q); |
cecf5d87 | 887 | mutex_unlock(&q->sysfs_lock); |
02ba8893 | 888 | |
cecf5d87 | 889 | mutex_lock(&q->sysfs_dir_lock); |
2c2086af BVA |
890 | /* |
891 | * Remove the sysfs attributes before unregistering the queue data | |
892 | * structures that can be modified through sysfs. | |
893 | */ | |
344e9ffc | 894 | if (queue_is_mq(q)) |
8682b92e | 895 | blk_mq_sysfs_unregister(disk); |
450deb93 | 896 | blk_crypto_sysfs_unregister(disk); |
667257e8 | 897 | |
b89f625e | 898 | mutex_lock(&q->sysfs_lock); |
f5ec592d | 899 | elv_unregister_queue(q); |
a2247f19 | 900 | disk_unregister_independent_access_ranges(disk); |
b89f625e | 901 | mutex_unlock(&q->sysfs_lock); |
0f692882 EB |
902 | |
903 | /* Now that we've deleted all child objects, we can delete the queue. */ | |
2bd85221 CH |
904 | kobject_uevent(&disk->queue_kobj, KOBJ_REMOVE); |
905 | kobject_del(&disk->queue_kobj); | |
cecf5d87 | 906 | mutex_unlock(&q->sysfs_dir_lock); |
2c2086af | 907 | |
6fc75f30 | 908 | blk_debugfs_remove(disk); |
8324aa91 | 909 | } |