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> |
320ae51f | 12 | #include <linux/blk-mq.h> |
eea8f41c | 13 | #include <linux/blk-cgroup.h> |
8324aa91 JA |
14 | |
15 | #include "blk.h" | |
3edcc0ce | 16 | #include "blk-mq.h" |
d173a251 | 17 | #include "blk-mq-debugfs.h" |
87760e5e | 18 | #include "blk-wbt.h" |
8324aa91 JA |
19 | |
20 | struct queue_sysfs_entry { | |
21 | struct attribute attr; | |
22 | ssize_t (*show)(struct request_queue *, char *); | |
23 | ssize_t (*store)(struct request_queue *, const char *, size_t); | |
24 | }; | |
25 | ||
26 | static ssize_t | |
9cb308ce | 27 | queue_var_show(unsigned long var, char *page) |
8324aa91 | 28 | { |
9cb308ce | 29 | return sprintf(page, "%lu\n", var); |
8324aa91 JA |
30 | } |
31 | ||
32 | static ssize_t | |
33 | queue_var_store(unsigned long *var, const char *page, size_t count) | |
34 | { | |
b1f3b64d DR |
35 | int err; |
36 | unsigned long v; | |
37 | ||
ed751e68 | 38 | err = kstrtoul(page, 10, &v); |
b1f3b64d DR |
39 | if (err || v > UINT_MAX) |
40 | return -EINVAL; | |
41 | ||
42 | *var = v; | |
8324aa91 | 43 | |
8324aa91 JA |
44 | return count; |
45 | } | |
46 | ||
80e091d1 | 47 | static ssize_t queue_var_store64(s64 *var, const char *page) |
87760e5e JA |
48 | { |
49 | int err; | |
80e091d1 | 50 | s64 v; |
87760e5e | 51 | |
80e091d1 | 52 | err = kstrtos64(page, 10, &v); |
87760e5e JA |
53 | if (err < 0) |
54 | return err; | |
55 | ||
56 | *var = v; | |
57 | return 0; | |
58 | } | |
59 | ||
8324aa91 JA |
60 | static ssize_t queue_requests_show(struct request_queue *q, char *page) |
61 | { | |
62 | return queue_var_show(q->nr_requests, (page)); | |
63 | } | |
64 | ||
65 | static ssize_t | |
66 | queue_requests_store(struct request_queue *q, const char *page, size_t count) | |
67 | { | |
8324aa91 | 68 | unsigned long nr; |
e3a2b3f9 | 69 | int ret, err; |
b8a9ae77 | 70 | |
e3a2b3f9 | 71 | if (!q->request_fn && !q->mq_ops) |
b8a9ae77 JA |
72 | return -EINVAL; |
73 | ||
74 | ret = queue_var_store(&nr, page, count); | |
b1f3b64d DR |
75 | if (ret < 0) |
76 | return ret; | |
77 | ||
8324aa91 JA |
78 | if (nr < BLKDEV_MIN_RQ) |
79 | nr = BLKDEV_MIN_RQ; | |
80 | ||
e3a2b3f9 JA |
81 | if (q->request_fn) |
82 | err = blk_update_nr_requests(q, nr); | |
83 | else | |
84 | err = blk_mq_update_nr_requests(q, nr); | |
85 | ||
86 | if (err) | |
87 | return err; | |
88 | ||
8324aa91 JA |
89 | return ret; |
90 | } | |
91 | ||
92 | static ssize_t queue_ra_show(struct request_queue *q, char *page) | |
93 | { | |
dc3b17cc | 94 | unsigned long ra_kb = q->backing_dev_info->ra_pages << |
09cbfeaf | 95 | (PAGE_SHIFT - 10); |
8324aa91 JA |
96 | |
97 | return queue_var_show(ra_kb, (page)); | |
98 | } | |
99 | ||
100 | static ssize_t | |
101 | queue_ra_store(struct request_queue *q, const char *page, size_t count) | |
102 | { | |
103 | unsigned long ra_kb; | |
104 | ssize_t ret = queue_var_store(&ra_kb, page, count); | |
105 | ||
b1f3b64d DR |
106 | if (ret < 0) |
107 | return ret; | |
108 | ||
dc3b17cc | 109 | q->backing_dev_info->ra_pages = ra_kb >> (PAGE_SHIFT - 10); |
8324aa91 JA |
110 | |
111 | return ret; | |
112 | } | |
113 | ||
114 | static ssize_t queue_max_sectors_show(struct request_queue *q, char *page) | |
115 | { | |
ae03bf63 | 116 | int max_sectors_kb = queue_max_sectors(q) >> 1; |
8324aa91 JA |
117 | |
118 | return queue_var_show(max_sectors_kb, (page)); | |
119 | } | |
120 | ||
c77a5710 MP |
121 | static ssize_t queue_max_segments_show(struct request_queue *q, char *page) |
122 | { | |
123 | return queue_var_show(queue_max_segments(q), (page)); | |
124 | } | |
125 | ||
1e739730 CH |
126 | static ssize_t queue_max_discard_segments_show(struct request_queue *q, |
127 | char *page) | |
128 | { | |
129 | return queue_var_show(queue_max_discard_segments(q), (page)); | |
130 | } | |
131 | ||
13f05c8d MP |
132 | static ssize_t queue_max_integrity_segments_show(struct request_queue *q, char *page) |
133 | { | |
134 | return queue_var_show(q->limits.max_integrity_segments, (page)); | |
135 | } | |
136 | ||
c77a5710 MP |
137 | static ssize_t queue_max_segment_size_show(struct request_queue *q, char *page) |
138 | { | |
e692cb66 | 139 | if (blk_queue_cluster(q)) |
c77a5710 MP |
140 | return queue_var_show(queue_max_segment_size(q), (page)); |
141 | ||
09cbfeaf | 142 | return queue_var_show(PAGE_SIZE, (page)); |
c77a5710 MP |
143 | } |
144 | ||
e1defc4f | 145 | static ssize_t queue_logical_block_size_show(struct request_queue *q, char *page) |
e68b903c | 146 | { |
e1defc4f | 147 | return queue_var_show(queue_logical_block_size(q), page); |
e68b903c MP |
148 | } |
149 | ||
c72758f3 MP |
150 | static ssize_t queue_physical_block_size_show(struct request_queue *q, char *page) |
151 | { | |
152 | return queue_var_show(queue_physical_block_size(q), page); | |
153 | } | |
154 | ||
87caf97c HR |
155 | static ssize_t queue_chunk_sectors_show(struct request_queue *q, char *page) |
156 | { | |
157 | return queue_var_show(q->limits.chunk_sectors, page); | |
158 | } | |
159 | ||
c72758f3 MP |
160 | static ssize_t queue_io_min_show(struct request_queue *q, char *page) |
161 | { | |
162 | return queue_var_show(queue_io_min(q), page); | |
163 | } | |
164 | ||
165 | static ssize_t queue_io_opt_show(struct request_queue *q, char *page) | |
166 | { | |
167 | return queue_var_show(queue_io_opt(q), page); | |
e68b903c MP |
168 | } |
169 | ||
86b37281 MP |
170 | static ssize_t queue_discard_granularity_show(struct request_queue *q, char *page) |
171 | { | |
172 | return queue_var_show(q->limits.discard_granularity, page); | |
173 | } | |
174 | ||
0034af03 JA |
175 | static ssize_t queue_discard_max_hw_show(struct request_queue *q, char *page) |
176 | { | |
0034af03 | 177 | |
18f922d0 A |
178 | return sprintf(page, "%llu\n", |
179 | (unsigned long long)q->limits.max_hw_discard_sectors << 9); | |
0034af03 JA |
180 | } |
181 | ||
86b37281 MP |
182 | static ssize_t queue_discard_max_show(struct request_queue *q, char *page) |
183 | { | |
a934a00a MP |
184 | return sprintf(page, "%llu\n", |
185 | (unsigned long long)q->limits.max_discard_sectors << 9); | |
86b37281 MP |
186 | } |
187 | ||
0034af03 JA |
188 | static ssize_t queue_discard_max_store(struct request_queue *q, |
189 | const char *page, size_t count) | |
190 | { | |
191 | unsigned long max_discard; | |
192 | ssize_t ret = queue_var_store(&max_discard, page, count); | |
193 | ||
194 | if (ret < 0) | |
195 | return ret; | |
196 | ||
197 | if (max_discard & (q->limits.discard_granularity - 1)) | |
198 | return -EINVAL; | |
199 | ||
200 | max_discard >>= 9; | |
201 | if (max_discard > UINT_MAX) | |
202 | return -EINVAL; | |
203 | ||
204 | if (max_discard > q->limits.max_hw_discard_sectors) | |
205 | max_discard = q->limits.max_hw_discard_sectors; | |
206 | ||
207 | q->limits.max_discard_sectors = max_discard; | |
208 | return ret; | |
209 | } | |
210 | ||
98262f27 MP |
211 | static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *page) |
212 | { | |
48920ff2 | 213 | return queue_var_show(0, page); |
98262f27 MP |
214 | } |
215 | ||
4363ac7c MP |
216 | static ssize_t queue_write_same_max_show(struct request_queue *q, char *page) |
217 | { | |
218 | return sprintf(page, "%llu\n", | |
219 | (unsigned long long)q->limits.max_write_same_sectors << 9); | |
220 | } | |
221 | ||
a6f0788e CK |
222 | static ssize_t queue_write_zeroes_max_show(struct request_queue *q, char *page) |
223 | { | |
224 | return sprintf(page, "%llu\n", | |
225 | (unsigned long long)q->limits.max_write_zeroes_sectors << 9); | |
226 | } | |
4363ac7c | 227 | |
8324aa91 JA |
228 | static ssize_t |
229 | queue_max_sectors_store(struct request_queue *q, const char *page, size_t count) | |
230 | { | |
231 | unsigned long max_sectors_kb, | |
ae03bf63 | 232 | max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1, |
09cbfeaf | 233 | page_kb = 1 << (PAGE_SHIFT - 10); |
8324aa91 JA |
234 | ssize_t ret = queue_var_store(&max_sectors_kb, page, count); |
235 | ||
b1f3b64d DR |
236 | if (ret < 0) |
237 | return ret; | |
238 | ||
ca369d51 MP |
239 | max_hw_sectors_kb = min_not_zero(max_hw_sectors_kb, (unsigned long) |
240 | q->limits.max_dev_sectors >> 1); | |
241 | ||
8324aa91 JA |
242 | if (max_sectors_kb > max_hw_sectors_kb || max_sectors_kb < page_kb) |
243 | return -EINVAL; | |
7c239517 | 244 | |
8324aa91 | 245 | spin_lock_irq(q->queue_lock); |
c295fc05 | 246 | q->limits.max_sectors = max_sectors_kb << 1; |
dc3b17cc | 247 | q->backing_dev_info->io_pages = max_sectors_kb >> (PAGE_SHIFT - 10); |
8324aa91 JA |
248 | spin_unlock_irq(q->queue_lock); |
249 | ||
250 | return ret; | |
251 | } | |
252 | ||
253 | static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page) | |
254 | { | |
ae03bf63 | 255 | int max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1; |
8324aa91 JA |
256 | |
257 | return queue_var_show(max_hw_sectors_kb, (page)); | |
258 | } | |
259 | ||
956bcb7c JA |
260 | #define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \ |
261 | static ssize_t \ | |
262 | queue_show_##name(struct request_queue *q, char *page) \ | |
263 | { \ | |
264 | int bit; \ | |
265 | bit = test_bit(QUEUE_FLAG_##flag, &q->queue_flags); \ | |
266 | return queue_var_show(neg ? !bit : bit, page); \ | |
267 | } \ | |
268 | static ssize_t \ | |
269 | queue_store_##name(struct request_queue *q, const char *page, size_t count) \ | |
270 | { \ | |
271 | unsigned long val; \ | |
272 | ssize_t ret; \ | |
273 | ret = queue_var_store(&val, page, count); \ | |
c678ef52 AB |
274 | if (ret < 0) \ |
275 | return ret; \ | |
956bcb7c JA |
276 | if (neg) \ |
277 | val = !val; \ | |
278 | \ | |
956bcb7c | 279 | if (val) \ |
8814ce8a | 280 | blk_queue_flag_set(QUEUE_FLAG_##flag, q); \ |
956bcb7c | 281 | else \ |
8814ce8a | 282 | blk_queue_flag_clear(QUEUE_FLAG_##flag, q); \ |
956bcb7c | 283 | return ret; \ |
1308835f BZ |
284 | } |
285 | ||
956bcb7c JA |
286 | QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1); |
287 | QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0); | |
288 | QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0); | |
289 | #undef QUEUE_SYSFS_BIT_FNS | |
1308835f | 290 | |
797476b8 DLM |
291 | static ssize_t queue_zoned_show(struct request_queue *q, char *page) |
292 | { | |
293 | switch (blk_queue_zoned_model(q)) { | |
294 | case BLK_ZONED_HA: | |
295 | return sprintf(page, "host-aware\n"); | |
296 | case BLK_ZONED_HM: | |
297 | return sprintf(page, "host-managed\n"); | |
298 | default: | |
299 | return sprintf(page, "none\n"); | |
300 | } | |
301 | } | |
302 | ||
965b652e DLM |
303 | static ssize_t queue_nr_zones_show(struct request_queue *q, char *page) |
304 | { | |
305 | return queue_var_show(blk_queue_nr_zones(q), page); | |
306 | } | |
307 | ||
ac9fafa1 AB |
308 | static ssize_t queue_nomerges_show(struct request_queue *q, char *page) |
309 | { | |
488991e2 AB |
310 | return queue_var_show((blk_queue_nomerges(q) << 1) | |
311 | blk_queue_noxmerges(q), page); | |
ac9fafa1 AB |
312 | } |
313 | ||
314 | static ssize_t queue_nomerges_store(struct request_queue *q, const char *page, | |
315 | size_t count) | |
316 | { | |
317 | unsigned long nm; | |
318 | ssize_t ret = queue_var_store(&nm, page, count); | |
319 | ||
b1f3b64d DR |
320 | if (ret < 0) |
321 | return ret; | |
322 | ||
bf0f9702 | 323 | spin_lock_irq(q->queue_lock); |
488991e2 AB |
324 | queue_flag_clear(QUEUE_FLAG_NOMERGES, q); |
325 | queue_flag_clear(QUEUE_FLAG_NOXMERGES, q); | |
326 | if (nm == 2) | |
bf0f9702 | 327 | queue_flag_set(QUEUE_FLAG_NOMERGES, q); |
488991e2 AB |
328 | else if (nm) |
329 | queue_flag_set(QUEUE_FLAG_NOXMERGES, q); | |
bf0f9702 | 330 | spin_unlock_irq(q->queue_lock); |
1308835f | 331 | |
ac9fafa1 AB |
332 | return ret; |
333 | } | |
334 | ||
c7c22e4d JA |
335 | static ssize_t queue_rq_affinity_show(struct request_queue *q, char *page) |
336 | { | |
9cb308ce | 337 | bool set = test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags); |
5757a6d7 | 338 | bool force = test_bit(QUEUE_FLAG_SAME_FORCE, &q->queue_flags); |
c7c22e4d | 339 | |
5757a6d7 | 340 | return queue_var_show(set << force, page); |
c7c22e4d JA |
341 | } |
342 | ||
343 | static ssize_t | |
344 | queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count) | |
345 | { | |
346 | ssize_t ret = -EINVAL; | |
0a06ff06 | 347 | #ifdef CONFIG_SMP |
c7c22e4d JA |
348 | unsigned long val; |
349 | ||
350 | ret = queue_var_store(&val, page, count); | |
b1f3b64d DR |
351 | if (ret < 0) |
352 | return ret; | |
353 | ||
c7c22e4d | 354 | spin_lock_irq(q->queue_lock); |
e8037d49 | 355 | if (val == 2) { |
c7c22e4d | 356 | queue_flag_set(QUEUE_FLAG_SAME_COMP, q); |
e8037d49 ES |
357 | queue_flag_set(QUEUE_FLAG_SAME_FORCE, q); |
358 | } else if (val == 1) { | |
359 | queue_flag_set(QUEUE_FLAG_SAME_COMP, q); | |
360 | queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q); | |
361 | } else if (val == 0) { | |
5757a6d7 DW |
362 | queue_flag_clear(QUEUE_FLAG_SAME_COMP, q); |
363 | queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q); | |
364 | } | |
c7c22e4d JA |
365 | spin_unlock_irq(q->queue_lock); |
366 | #endif | |
367 | return ret; | |
368 | } | |
8324aa91 | 369 | |
06426adf JA |
370 | static ssize_t queue_poll_delay_show(struct request_queue *q, char *page) |
371 | { | |
64f1c21e JA |
372 | int val; |
373 | ||
374 | if (q->poll_nsec == -1) | |
375 | val = -1; | |
376 | else | |
377 | val = q->poll_nsec / 1000; | |
378 | ||
379 | return sprintf(page, "%d\n", val); | |
06426adf JA |
380 | } |
381 | ||
382 | static ssize_t queue_poll_delay_store(struct request_queue *q, const char *page, | |
383 | size_t count) | |
384 | { | |
64f1c21e | 385 | int err, val; |
06426adf JA |
386 | |
387 | if (!q->mq_ops || !q->mq_ops->poll) | |
388 | return -EINVAL; | |
389 | ||
64f1c21e JA |
390 | err = kstrtoint(page, 10, &val); |
391 | if (err < 0) | |
392 | return err; | |
06426adf | 393 | |
64f1c21e JA |
394 | if (val == -1) |
395 | q->poll_nsec = -1; | |
396 | else | |
397 | q->poll_nsec = val * 1000; | |
398 | ||
399 | return count; | |
06426adf JA |
400 | } |
401 | ||
05229bee JA |
402 | static ssize_t queue_poll_show(struct request_queue *q, char *page) |
403 | { | |
404 | return queue_var_show(test_bit(QUEUE_FLAG_POLL, &q->queue_flags), page); | |
405 | } | |
406 | ||
407 | static ssize_t queue_poll_store(struct request_queue *q, const char *page, | |
408 | size_t count) | |
409 | { | |
410 | unsigned long poll_on; | |
411 | ssize_t ret; | |
412 | ||
413 | if (!q->mq_ops || !q->mq_ops->poll) | |
414 | return -EINVAL; | |
415 | ||
416 | ret = queue_var_store(&poll_on, page, count); | |
417 | if (ret < 0) | |
418 | return ret; | |
419 | ||
05229bee | 420 | if (poll_on) |
8814ce8a | 421 | blk_queue_flag_set(QUEUE_FLAG_POLL, q); |
05229bee | 422 | else |
8814ce8a | 423 | blk_queue_flag_clear(QUEUE_FLAG_POLL, q); |
05229bee JA |
424 | |
425 | return ret; | |
426 | } | |
427 | ||
87760e5e JA |
428 | static ssize_t queue_wb_lat_show(struct request_queue *q, char *page) |
429 | { | |
a7905043 | 430 | if (!wbt_rq_qos(q)) |
87760e5e JA |
431 | return -EINVAL; |
432 | ||
a7905043 | 433 | return sprintf(page, "%llu\n", div_u64(wbt_get_min_lat(q), 1000)); |
87760e5e JA |
434 | } |
435 | ||
436 | static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page, | |
437 | size_t count) | |
438 | { | |
a7905043 | 439 | struct rq_qos *rqos; |
87760e5e | 440 | ssize_t ret; |
80e091d1 | 441 | s64 val; |
87760e5e | 442 | |
87760e5e JA |
443 | ret = queue_var_store64(&val, page); |
444 | if (ret < 0) | |
445 | return ret; | |
d62118b6 JA |
446 | if (val < -1) |
447 | return -EINVAL; | |
448 | ||
a7905043 JB |
449 | rqos = wbt_rq_qos(q); |
450 | if (!rqos) { | |
d62118b6 JA |
451 | ret = wbt_init(q); |
452 | if (ret) | |
453 | return ret; | |
d62118b6 | 454 | } |
87760e5e | 455 | |
80e091d1 | 456 | if (val == -1) |
a7905043 | 457 | val = wbt_default_latency_nsec(q); |
80e091d1 | 458 | else if (val >= 0) |
a7905043 | 459 | val *= 1000ULL; |
d62118b6 | 460 | |
c125311d JA |
461 | /* |
462 | * Ensure that the queue is idled, in case the latency update | |
463 | * ends up either enabling or disabling wbt completely. We can't | |
464 | * have IO inflight if that happens. | |
465 | */ | |
466 | if (q->mq_ops) { | |
467 | blk_mq_freeze_queue(q); | |
468 | blk_mq_quiesce_queue(q); | |
469 | } else | |
470 | blk_queue_bypass_start(q); | |
80e091d1 | 471 | |
c125311d | 472 | wbt_set_min_lat(q, val); |
a7905043 | 473 | wbt_update_limits(q); |
c125311d JA |
474 | |
475 | if (q->mq_ops) { | |
476 | blk_mq_unquiesce_queue(q); | |
477 | blk_mq_unfreeze_queue(q); | |
478 | } else | |
479 | blk_queue_bypass_end(q); | |
480 | ||
87760e5e JA |
481 | return count; |
482 | } | |
483 | ||
93e9d8e8 JA |
484 | static ssize_t queue_wc_show(struct request_queue *q, char *page) |
485 | { | |
486 | if (test_bit(QUEUE_FLAG_WC, &q->queue_flags)) | |
487 | return sprintf(page, "write back\n"); | |
488 | ||
489 | return sprintf(page, "write through\n"); | |
490 | } | |
491 | ||
492 | static ssize_t queue_wc_store(struct request_queue *q, const char *page, | |
493 | size_t count) | |
494 | { | |
495 | int set = -1; | |
496 | ||
497 | if (!strncmp(page, "write back", 10)) | |
498 | set = 1; | |
499 | else if (!strncmp(page, "write through", 13) || | |
500 | !strncmp(page, "none", 4)) | |
501 | set = 0; | |
502 | ||
503 | if (set == -1) | |
504 | return -EINVAL; | |
505 | ||
93e9d8e8 | 506 | if (set) |
8814ce8a | 507 | blk_queue_flag_set(QUEUE_FLAG_WC, q); |
93e9d8e8 | 508 | else |
8814ce8a | 509 | blk_queue_flag_clear(QUEUE_FLAG_WC, q); |
93e9d8e8 JA |
510 | |
511 | return count; | |
512 | } | |
513 | ||
6fcefbe5 KO |
514 | static ssize_t queue_fua_show(struct request_queue *q, char *page) |
515 | { | |
516 | return sprintf(page, "%u\n", test_bit(QUEUE_FLAG_FUA, &q->queue_flags)); | |
517 | } | |
518 | ||
ea6ca600 YK |
519 | static ssize_t queue_dax_show(struct request_queue *q, char *page) |
520 | { | |
521 | return queue_var_show(blk_queue_dax(q), page); | |
522 | } | |
523 | ||
8324aa91 | 524 | static struct queue_sysfs_entry queue_requests_entry = { |
5657a819 | 525 | .attr = {.name = "nr_requests", .mode = 0644 }, |
8324aa91 JA |
526 | .show = queue_requests_show, |
527 | .store = queue_requests_store, | |
528 | }; | |
529 | ||
530 | static struct queue_sysfs_entry queue_ra_entry = { | |
5657a819 | 531 | .attr = {.name = "read_ahead_kb", .mode = 0644 }, |
8324aa91 JA |
532 | .show = queue_ra_show, |
533 | .store = queue_ra_store, | |
534 | }; | |
535 | ||
536 | static struct queue_sysfs_entry queue_max_sectors_entry = { | |
5657a819 | 537 | .attr = {.name = "max_sectors_kb", .mode = 0644 }, |
8324aa91 JA |
538 | .show = queue_max_sectors_show, |
539 | .store = queue_max_sectors_store, | |
540 | }; | |
541 | ||
542 | static struct queue_sysfs_entry queue_max_hw_sectors_entry = { | |
5657a819 | 543 | .attr = {.name = "max_hw_sectors_kb", .mode = 0444 }, |
8324aa91 JA |
544 | .show = queue_max_hw_sectors_show, |
545 | }; | |
546 | ||
c77a5710 | 547 | static struct queue_sysfs_entry queue_max_segments_entry = { |
5657a819 | 548 | .attr = {.name = "max_segments", .mode = 0444 }, |
c77a5710 MP |
549 | .show = queue_max_segments_show, |
550 | }; | |
551 | ||
1e739730 | 552 | static struct queue_sysfs_entry queue_max_discard_segments_entry = { |
5657a819 | 553 | .attr = {.name = "max_discard_segments", .mode = 0444 }, |
1e739730 CH |
554 | .show = queue_max_discard_segments_show, |
555 | }; | |
556 | ||
13f05c8d | 557 | static struct queue_sysfs_entry queue_max_integrity_segments_entry = { |
5657a819 | 558 | .attr = {.name = "max_integrity_segments", .mode = 0444 }, |
13f05c8d MP |
559 | .show = queue_max_integrity_segments_show, |
560 | }; | |
561 | ||
c77a5710 | 562 | static struct queue_sysfs_entry queue_max_segment_size_entry = { |
5657a819 | 563 | .attr = {.name = "max_segment_size", .mode = 0444 }, |
c77a5710 MP |
564 | .show = queue_max_segment_size_show, |
565 | }; | |
566 | ||
8324aa91 | 567 | static struct queue_sysfs_entry queue_iosched_entry = { |
5657a819 | 568 | .attr = {.name = "scheduler", .mode = 0644 }, |
8324aa91 JA |
569 | .show = elv_iosched_show, |
570 | .store = elv_iosched_store, | |
571 | }; | |
572 | ||
e68b903c | 573 | static struct queue_sysfs_entry queue_hw_sector_size_entry = { |
5657a819 | 574 | .attr = {.name = "hw_sector_size", .mode = 0444 }, |
e1defc4f MP |
575 | .show = queue_logical_block_size_show, |
576 | }; | |
577 | ||
578 | static struct queue_sysfs_entry queue_logical_block_size_entry = { | |
5657a819 | 579 | .attr = {.name = "logical_block_size", .mode = 0444 }, |
e1defc4f | 580 | .show = queue_logical_block_size_show, |
e68b903c MP |
581 | }; |
582 | ||
c72758f3 | 583 | static struct queue_sysfs_entry queue_physical_block_size_entry = { |
5657a819 | 584 | .attr = {.name = "physical_block_size", .mode = 0444 }, |
c72758f3 MP |
585 | .show = queue_physical_block_size_show, |
586 | }; | |
587 | ||
87caf97c | 588 | static struct queue_sysfs_entry queue_chunk_sectors_entry = { |
5657a819 | 589 | .attr = {.name = "chunk_sectors", .mode = 0444 }, |
87caf97c HR |
590 | .show = queue_chunk_sectors_show, |
591 | }; | |
592 | ||
c72758f3 | 593 | static struct queue_sysfs_entry queue_io_min_entry = { |
5657a819 | 594 | .attr = {.name = "minimum_io_size", .mode = 0444 }, |
c72758f3 MP |
595 | .show = queue_io_min_show, |
596 | }; | |
597 | ||
598 | static struct queue_sysfs_entry queue_io_opt_entry = { | |
5657a819 | 599 | .attr = {.name = "optimal_io_size", .mode = 0444 }, |
c72758f3 | 600 | .show = queue_io_opt_show, |
e68b903c MP |
601 | }; |
602 | ||
86b37281 | 603 | static struct queue_sysfs_entry queue_discard_granularity_entry = { |
5657a819 | 604 | .attr = {.name = "discard_granularity", .mode = 0444 }, |
86b37281 MP |
605 | .show = queue_discard_granularity_show, |
606 | }; | |
607 | ||
0034af03 | 608 | static struct queue_sysfs_entry queue_discard_max_hw_entry = { |
5657a819 | 609 | .attr = {.name = "discard_max_hw_bytes", .mode = 0444 }, |
0034af03 JA |
610 | .show = queue_discard_max_hw_show, |
611 | }; | |
612 | ||
86b37281 | 613 | static struct queue_sysfs_entry queue_discard_max_entry = { |
5657a819 | 614 | .attr = {.name = "discard_max_bytes", .mode = 0644 }, |
86b37281 | 615 | .show = queue_discard_max_show, |
0034af03 | 616 | .store = queue_discard_max_store, |
86b37281 MP |
617 | }; |
618 | ||
98262f27 | 619 | static struct queue_sysfs_entry queue_discard_zeroes_data_entry = { |
5657a819 | 620 | .attr = {.name = "discard_zeroes_data", .mode = 0444 }, |
98262f27 MP |
621 | .show = queue_discard_zeroes_data_show, |
622 | }; | |
623 | ||
4363ac7c | 624 | static struct queue_sysfs_entry queue_write_same_max_entry = { |
5657a819 | 625 | .attr = {.name = "write_same_max_bytes", .mode = 0444 }, |
4363ac7c MP |
626 | .show = queue_write_same_max_show, |
627 | }; | |
628 | ||
a6f0788e | 629 | static struct queue_sysfs_entry queue_write_zeroes_max_entry = { |
5657a819 | 630 | .attr = {.name = "write_zeroes_max_bytes", .mode = 0444 }, |
a6f0788e CK |
631 | .show = queue_write_zeroes_max_show, |
632 | }; | |
633 | ||
1308835f | 634 | static struct queue_sysfs_entry queue_nonrot_entry = { |
5657a819 | 635 | .attr = {.name = "rotational", .mode = 0644 }, |
956bcb7c JA |
636 | .show = queue_show_nonrot, |
637 | .store = queue_store_nonrot, | |
1308835f BZ |
638 | }; |
639 | ||
797476b8 | 640 | static struct queue_sysfs_entry queue_zoned_entry = { |
5657a819 | 641 | .attr = {.name = "zoned", .mode = 0444 }, |
797476b8 DLM |
642 | .show = queue_zoned_show, |
643 | }; | |
644 | ||
965b652e DLM |
645 | static struct queue_sysfs_entry queue_nr_zones_entry = { |
646 | .attr = {.name = "nr_zones", .mode = 0444 }, | |
647 | .show = queue_nr_zones_show, | |
648 | }; | |
649 | ||
ac9fafa1 | 650 | static struct queue_sysfs_entry queue_nomerges_entry = { |
5657a819 | 651 | .attr = {.name = "nomerges", .mode = 0644 }, |
ac9fafa1 AB |
652 | .show = queue_nomerges_show, |
653 | .store = queue_nomerges_store, | |
654 | }; | |
655 | ||
c7c22e4d | 656 | static struct queue_sysfs_entry queue_rq_affinity_entry = { |
5657a819 | 657 | .attr = {.name = "rq_affinity", .mode = 0644 }, |
c7c22e4d JA |
658 | .show = queue_rq_affinity_show, |
659 | .store = queue_rq_affinity_store, | |
660 | }; | |
661 | ||
bc58ba94 | 662 | static struct queue_sysfs_entry queue_iostats_entry = { |
5657a819 | 663 | .attr = {.name = "iostats", .mode = 0644 }, |
956bcb7c JA |
664 | .show = queue_show_iostats, |
665 | .store = queue_store_iostats, | |
bc58ba94 JA |
666 | }; |
667 | ||
e2e1a148 | 668 | static struct queue_sysfs_entry queue_random_entry = { |
5657a819 | 669 | .attr = {.name = "add_random", .mode = 0644 }, |
956bcb7c JA |
670 | .show = queue_show_random, |
671 | .store = queue_store_random, | |
e2e1a148 JA |
672 | }; |
673 | ||
05229bee | 674 | static struct queue_sysfs_entry queue_poll_entry = { |
5657a819 | 675 | .attr = {.name = "io_poll", .mode = 0644 }, |
05229bee JA |
676 | .show = queue_poll_show, |
677 | .store = queue_poll_store, | |
678 | }; | |
679 | ||
06426adf | 680 | static struct queue_sysfs_entry queue_poll_delay_entry = { |
5657a819 | 681 | .attr = {.name = "io_poll_delay", .mode = 0644 }, |
06426adf JA |
682 | .show = queue_poll_delay_show, |
683 | .store = queue_poll_delay_store, | |
684 | }; | |
685 | ||
93e9d8e8 | 686 | static struct queue_sysfs_entry queue_wc_entry = { |
5657a819 | 687 | .attr = {.name = "write_cache", .mode = 0644 }, |
93e9d8e8 JA |
688 | .show = queue_wc_show, |
689 | .store = queue_wc_store, | |
690 | }; | |
691 | ||
6fcefbe5 | 692 | static struct queue_sysfs_entry queue_fua_entry = { |
5657a819 | 693 | .attr = {.name = "fua", .mode = 0444 }, |
6fcefbe5 KO |
694 | .show = queue_fua_show, |
695 | }; | |
696 | ||
ea6ca600 | 697 | static struct queue_sysfs_entry queue_dax_entry = { |
5657a819 | 698 | .attr = {.name = "dax", .mode = 0444 }, |
ea6ca600 YK |
699 | .show = queue_dax_show, |
700 | }; | |
701 | ||
87760e5e | 702 | static struct queue_sysfs_entry queue_wb_lat_entry = { |
5657a819 | 703 | .attr = {.name = "wbt_lat_usec", .mode = 0644 }, |
87760e5e JA |
704 | .show = queue_wb_lat_show, |
705 | .store = queue_wb_lat_store, | |
706 | }; | |
707 | ||
297e3d85 SL |
708 | #ifdef CONFIG_BLK_DEV_THROTTLING_LOW |
709 | static struct queue_sysfs_entry throtl_sample_time_entry = { | |
5657a819 | 710 | .attr = {.name = "throttle_sample_time", .mode = 0644 }, |
297e3d85 SL |
711 | .show = blk_throtl_sample_time_show, |
712 | .store = blk_throtl_sample_time_store, | |
713 | }; | |
714 | #endif | |
715 | ||
8324aa91 JA |
716 | static struct attribute *default_attrs[] = { |
717 | &queue_requests_entry.attr, | |
718 | &queue_ra_entry.attr, | |
719 | &queue_max_hw_sectors_entry.attr, | |
720 | &queue_max_sectors_entry.attr, | |
c77a5710 | 721 | &queue_max_segments_entry.attr, |
1e739730 | 722 | &queue_max_discard_segments_entry.attr, |
13f05c8d | 723 | &queue_max_integrity_segments_entry.attr, |
c77a5710 | 724 | &queue_max_segment_size_entry.attr, |
8324aa91 | 725 | &queue_iosched_entry.attr, |
e68b903c | 726 | &queue_hw_sector_size_entry.attr, |
e1defc4f | 727 | &queue_logical_block_size_entry.attr, |
c72758f3 | 728 | &queue_physical_block_size_entry.attr, |
87caf97c | 729 | &queue_chunk_sectors_entry.attr, |
c72758f3 MP |
730 | &queue_io_min_entry.attr, |
731 | &queue_io_opt_entry.attr, | |
86b37281 MP |
732 | &queue_discard_granularity_entry.attr, |
733 | &queue_discard_max_entry.attr, | |
0034af03 | 734 | &queue_discard_max_hw_entry.attr, |
98262f27 | 735 | &queue_discard_zeroes_data_entry.attr, |
4363ac7c | 736 | &queue_write_same_max_entry.attr, |
a6f0788e | 737 | &queue_write_zeroes_max_entry.attr, |
1308835f | 738 | &queue_nonrot_entry.attr, |
797476b8 | 739 | &queue_zoned_entry.attr, |
965b652e | 740 | &queue_nr_zones_entry.attr, |
ac9fafa1 | 741 | &queue_nomerges_entry.attr, |
c7c22e4d | 742 | &queue_rq_affinity_entry.attr, |
bc58ba94 | 743 | &queue_iostats_entry.attr, |
e2e1a148 | 744 | &queue_random_entry.attr, |
05229bee | 745 | &queue_poll_entry.attr, |
93e9d8e8 | 746 | &queue_wc_entry.attr, |
6fcefbe5 | 747 | &queue_fua_entry.attr, |
ea6ca600 | 748 | &queue_dax_entry.attr, |
87760e5e | 749 | &queue_wb_lat_entry.attr, |
06426adf | 750 | &queue_poll_delay_entry.attr, |
297e3d85 SL |
751 | #ifdef CONFIG_BLK_DEV_THROTTLING_LOW |
752 | &throtl_sample_time_entry.attr, | |
753 | #endif | |
8324aa91 JA |
754 | NULL, |
755 | }; | |
756 | ||
757 | #define to_queue(atr) container_of((atr), struct queue_sysfs_entry, attr) | |
758 | ||
759 | static ssize_t | |
760 | queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
761 | { | |
762 | struct queue_sysfs_entry *entry = to_queue(attr); | |
763 | struct request_queue *q = | |
764 | container_of(kobj, struct request_queue, kobj); | |
765 | ssize_t res; | |
766 | ||
767 | if (!entry->show) | |
768 | return -EIO; | |
769 | mutex_lock(&q->sysfs_lock); | |
3f3299d5 | 770 | if (blk_queue_dying(q)) { |
8324aa91 JA |
771 | mutex_unlock(&q->sysfs_lock); |
772 | return -ENOENT; | |
773 | } | |
774 | res = entry->show(q, page); | |
775 | mutex_unlock(&q->sysfs_lock); | |
776 | return res; | |
777 | } | |
778 | ||
779 | static ssize_t | |
780 | queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
781 | const char *page, size_t length) | |
782 | { | |
783 | struct queue_sysfs_entry *entry = to_queue(attr); | |
6728cb0e | 784 | struct request_queue *q; |
8324aa91 JA |
785 | ssize_t res; |
786 | ||
787 | if (!entry->store) | |
788 | return -EIO; | |
6728cb0e JA |
789 | |
790 | q = container_of(kobj, struct request_queue, kobj); | |
8324aa91 | 791 | mutex_lock(&q->sysfs_lock); |
3f3299d5 | 792 | if (blk_queue_dying(q)) { |
8324aa91 JA |
793 | mutex_unlock(&q->sysfs_lock); |
794 | return -ENOENT; | |
795 | } | |
796 | res = entry->store(q, page, length); | |
797 | mutex_unlock(&q->sysfs_lock); | |
798 | return res; | |
799 | } | |
800 | ||
548bc8e1 TH |
801 | static void blk_free_queue_rcu(struct rcu_head *rcu_head) |
802 | { | |
803 | struct request_queue *q = container_of(rcu_head, struct request_queue, | |
804 | rcu_head); | |
805 | kmem_cache_free(blk_requestq_cachep, q); | |
806 | } | |
807 | ||
8324aa91 | 808 | /** |
dc9edc44 BVA |
809 | * __blk_release_queue - release a request queue when it is no longer needed |
810 | * @work: pointer to the release_work member of the request queue to be released | |
8324aa91 JA |
811 | * |
812 | * Description: | |
dc9edc44 BVA |
813 | * blk_release_queue is the counterpart of blk_init_queue(). It should be |
814 | * called when a request queue is being released; typically when a block | |
815 | * device is being de-registered. Its primary task it to free the queue | |
816 | * itself. | |
8324aa91 | 817 | * |
dc9edc44 | 818 | * Notes: |
45a9c9d9 BVA |
819 | * The low level driver must have finished any outstanding requests first |
820 | * via blk_cleanup_queue(). | |
dc9edc44 BVA |
821 | * |
822 | * Although blk_release_queue() may be called with preemption disabled, | |
823 | * __blk_release_queue() may sleep. | |
824 | */ | |
825 | static void __blk_release_queue(struct work_struct *work) | |
8324aa91 | 826 | { |
dc9edc44 | 827 | struct request_queue *q = container_of(work, typeof(*q), release_work); |
8324aa91 | 828 | |
34dbad5d OS |
829 | if (test_bit(QUEUE_FLAG_POLL_STATS, &q->queue_flags)) |
830 | blk_stat_remove_callback(q, q->poll_cb); | |
831 | blk_stat_free_callback(q->poll_cb); | |
777eb1bf | 832 | |
24ecc358 BVA |
833 | if (!blk_queue_dead(q)) { |
834 | /* | |
835 | * Last reference was dropped without having called | |
836 | * blk_cleanup_queue(). | |
837 | */ | |
838 | WARN_ONCE(blk_queue_init_done(q), | |
839 | "request queue %p has been registered but blk_cleanup_queue() has not been called for that queue\n", | |
840 | q); | |
841 | blk_exit_queue(q); | |
842 | } | |
843 | ||
b86d865c | 844 | WARN(blk_queue_root_blkg(q), |
24ecc358 BVA |
845 | "request queue %p is being released but it has not yet been removed from the blkcg controller\n", |
846 | q); | |
847 | ||
34dbad5d OS |
848 | blk_free_queue_stats(q->stats); |
849 | ||
b425e504 | 850 | blk_exit_rl(q, &q->root_rl); |
8324aa91 JA |
851 | |
852 | if (q->queue_tags) | |
853 | __blk_queue_free_tags(q); | |
854 | ||
bf505456 DLM |
855 | blk_queue_free_zone_bitmaps(q); |
856 | ||
6d247d7f CH |
857 | if (!q->mq_ops) { |
858 | if (q->exit_rq_fn) | |
859 | q->exit_rq_fn(q, q->fq->flush_rq); | |
f70ced09 | 860 | blk_free_flush_queue(q->fq); |
6d247d7f | 861 | } else { |
e09aae7e | 862 | blk_mq_release(q); |
6d247d7f | 863 | } |
18741986 | 864 | |
8324aa91 JA |
865 | blk_trace_shutdown(q); |
866 | ||
62ebce16 OS |
867 | if (q->mq_ops) |
868 | blk_mq_debugfs_unregister(q); | |
869 | ||
338aa96d | 870 | bioset_exit(&q->bio_split); |
54efd50b | 871 | |
a73f730d | 872 | ida_simple_remove(&blk_queue_ida, q->id); |
548bc8e1 | 873 | call_rcu(&q->rcu_head, blk_free_queue_rcu); |
8324aa91 JA |
874 | } |
875 | ||
dc9edc44 BVA |
876 | static void blk_release_queue(struct kobject *kobj) |
877 | { | |
878 | struct request_queue *q = | |
879 | container_of(kobj, struct request_queue, kobj); | |
880 | ||
881 | INIT_WORK(&q->release_work, __blk_release_queue); | |
882 | schedule_work(&q->release_work); | |
883 | } | |
884 | ||
52cf25d0 | 885 | static const struct sysfs_ops queue_sysfs_ops = { |
8324aa91 JA |
886 | .show = queue_attr_show, |
887 | .store = queue_attr_store, | |
888 | }; | |
889 | ||
890 | struct kobj_type blk_queue_ktype = { | |
891 | .sysfs_ops = &queue_sysfs_ops, | |
892 | .default_attrs = default_attrs, | |
893 | .release = blk_release_queue, | |
894 | }; | |
895 | ||
2c2086af BVA |
896 | /** |
897 | * blk_register_queue - register a block layer queue with sysfs | |
898 | * @disk: Disk of which the request queue should be registered with sysfs. | |
899 | */ | |
8324aa91 JA |
900 | int blk_register_queue(struct gendisk *disk) |
901 | { | |
902 | int ret; | |
1d54ad6d | 903 | struct device *dev = disk_to_dev(disk); |
8324aa91 JA |
904 | struct request_queue *q = disk->queue; |
905 | ||
fb199746 | 906 | if (WARN_ON(!q)) |
8324aa91 JA |
907 | return -ENXIO; |
908 | ||
334335d2 OS |
909 | WARN_ONCE(test_bit(QUEUE_FLAG_REGISTERED, &q->queue_flags), |
910 | "%s is registering an already registered queue\n", | |
911 | kobject_name(&dev->kobj)); | |
912 | queue_flag_set_unlocked(QUEUE_FLAG_REGISTERED, q); | |
913 | ||
749fefe6 | 914 | /* |
17497acb TH |
915 | * SCSI probing may synchronously create and destroy a lot of |
916 | * request_queues for non-existent devices. Shutting down a fully | |
917 | * functional queue takes measureable wallclock time as RCU grace | |
918 | * periods are involved. To avoid excessive latency in these | |
919 | * cases, a request_queue starts out in a degraded mode which is | |
920 | * faster to shut down and is made fully functional here as | |
921 | * request_queues for non-existent devices never get registered. | |
749fefe6 | 922 | */ |
df35c7c9 AS |
923 | if (!blk_queue_init_done(q)) { |
924 | queue_flag_set_unlocked(QUEUE_FLAG_INIT_DONE, q); | |
3ef28e83 | 925 | percpu_ref_switch_to_percpu(&q->q_usage_counter); |
df35c7c9 AS |
926 | blk_queue_bypass_end(q); |
927 | } | |
749fefe6 | 928 | |
1d54ad6d LZ |
929 | ret = blk_trace_init_sysfs(dev); |
930 | if (ret) | |
931 | return ret; | |
932 | ||
b410aff2 TE |
933 | /* Prevent changes through sysfs until registration is completed. */ |
934 | mutex_lock(&q->sysfs_lock); | |
935 | ||
c9059598 | 936 | ret = kobject_add(&q->kobj, kobject_get(&dev->kobj), "%s", "queue"); |
ed5302d3 LY |
937 | if (ret < 0) { |
938 | blk_trace_remove_sysfs(dev); | |
b410aff2 | 939 | goto unlock; |
ed5302d3 | 940 | } |
8324aa91 | 941 | |
a8ecdd71 | 942 | if (q->mq_ops) { |
2d0364c8 | 943 | __blk_mq_register_dev(dev, q); |
a8ecdd71 BVA |
944 | blk_mq_debugfs_register(q); |
945 | } | |
9c1051aa | 946 | |
8324aa91 JA |
947 | kobject_uevent(&q->kobj, KOBJ_ADD); |
948 | ||
8330cdb0 | 949 | wbt_enable_default(q); |
87760e5e | 950 | |
d61fcfa4 SL |
951 | blk_throtl_register_queue(q); |
952 | ||
80c6b157 OS |
953 | if (q->request_fn || (q->mq_ops && q->elevator)) { |
954 | ret = elv_register_queue(q); | |
955 | if (ret) { | |
2c2086af | 956 | mutex_unlock(&q->sysfs_lock); |
80c6b157 OS |
957 | kobject_uevent(&q->kobj, KOBJ_REMOVE); |
958 | kobject_del(&q->kobj); | |
959 | blk_trace_remove_sysfs(dev); | |
960 | kobject_put(&dev->kobj); | |
2c2086af | 961 | return ret; |
80c6b157 | 962 | } |
8324aa91 | 963 | } |
b410aff2 TE |
964 | ret = 0; |
965 | unlock: | |
966 | mutex_unlock(&q->sysfs_lock); | |
967 | return ret; | |
8324aa91 | 968 | } |
fa70d2e2 | 969 | EXPORT_SYMBOL_GPL(blk_register_queue); |
8324aa91 | 970 | |
2c2086af BVA |
971 | /** |
972 | * blk_unregister_queue - counterpart of blk_register_queue() | |
973 | * @disk: Disk of which the request queue should be unregistered from sysfs. | |
974 | * | |
975 | * Note: the caller is responsible for guaranteeing that this function is called | |
976 | * after blk_register_queue() has finished. | |
977 | */ | |
8324aa91 JA |
978 | void blk_unregister_queue(struct gendisk *disk) |
979 | { | |
980 | struct request_queue *q = disk->queue; | |
981 | ||
fb199746 AM |
982 | if (WARN_ON(!q)) |
983 | return; | |
984 | ||
fa70d2e2 MS |
985 | /* Return early if disk->queue was never registered. */ |
986 | if (!test_bit(QUEUE_FLAG_REGISTERED, &q->queue_flags)) | |
987 | return; | |
988 | ||
667257e8 | 989 | /* |
2c2086af BVA |
990 | * Since sysfs_remove_dir() prevents adding new directory entries |
991 | * before removal of existing entries starts, protect against | |
992 | * concurrent elv_iosched_store() calls. | |
667257e8 | 993 | */ |
e9a823fb | 994 | mutex_lock(&q->sysfs_lock); |
334335d2 | 995 | |
8814ce8a | 996 | blk_queue_flag_clear(QUEUE_FLAG_REGISTERED, q); |
02ba8893 | 997 | |
2c2086af BVA |
998 | /* |
999 | * Remove the sysfs attributes before unregistering the queue data | |
1000 | * structures that can be modified through sysfs. | |
1001 | */ | |
320ae51f | 1002 | if (q->mq_ops) |
b21d5b30 | 1003 | blk_mq_unregister_dev(disk_to_dev(disk), q); |
2c2086af | 1004 | mutex_unlock(&q->sysfs_lock); |
8324aa91 | 1005 | |
48c0d4d4 ZK |
1006 | kobject_uevent(&q->kobj, KOBJ_REMOVE); |
1007 | kobject_del(&q->kobj); | |
1008 | blk_trace_remove_sysfs(disk_to_dev(disk)); | |
667257e8 | 1009 | |
a7905043 | 1010 | rq_qos_exit(q); |
2c2086af BVA |
1011 | |
1012 | mutex_lock(&q->sysfs_lock); | |
1013 | if (q->request_fn || (q->mq_ops && q->elevator)) | |
1014 | elv_unregister_queue(q); | |
667257e8 | 1015 | mutex_unlock(&q->sysfs_lock); |
2c2086af BVA |
1016 | |
1017 | kobject_put(&disk_to_dev(disk)->kobj); | |
8324aa91 | 1018 | } |