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8c16567d | 1 | // SPDX-License-Identifier: GPL-2.0 |
07e4fead OS |
2 | /* |
3 | * Copyright (C) 2017 Facebook | |
07e4fead OS |
4 | */ |
5 | ||
6 | #include <linux/kernel.h> | |
7 | #include <linux/blkdev.h> | |
8 | #include <linux/debugfs.h> | |
9 | ||
10 | #include <linux/blk-mq.h> | |
18fbda91 | 11 | #include "blk.h" |
07e4fead | 12 | #include "blk-mq.h" |
d173a251 | 13 | #include "blk-mq-debugfs.h" |
d96b37c0 | 14 | #include "blk-mq-tag.h" |
cc56694f | 15 | #include "blk-rq-qos.h" |
07e4fead | 16 | |
1209cb7f BVA |
17 | static void print_stat(struct seq_file *m, struct blk_rq_stat *stat) |
18 | { | |
19 | if (stat->nr_samples) { | |
315eb656 | 20 | seq_printf(m, "samples=%d, mean=%llu, min=%llu, max=%llu", |
1209cb7f BVA |
21 | stat->nr_samples, stat->mean, stat->min, stat->max); |
22 | } else { | |
23 | seq_puts(m, "samples=0"); | |
24 | } | |
25 | } | |
26 | ||
27 | static int queue_poll_stat_show(void *data, struct seq_file *m) | |
28 | { | |
29 | struct request_queue *q = data; | |
30 | int bucket; | |
31 | ||
243d9f78 CK |
32 | for (bucket = 0; bucket < (BLK_MQ_POLL_STATS_BKTS / 2); bucket++) { |
33 | seq_printf(m, "read (%d Bytes): ", 1 << (9 + bucket)); | |
34 | print_stat(m, &q->poll_stat[2 * bucket]); | |
1209cb7f BVA |
35 | seq_puts(m, "\n"); |
36 | ||
243d9f78 CK |
37 | seq_printf(m, "write (%d Bytes): ", 1 << (9 + bucket)); |
38 | print_stat(m, &q->poll_stat[2 * bucket + 1]); | |
1209cb7f BVA |
39 | seq_puts(m, "\n"); |
40 | } | |
41 | return 0; | |
42 | } | |
43 | ||
44 | static void *queue_requeue_list_start(struct seq_file *m, loff_t *pos) | |
45 | __acquires(&q->requeue_lock) | |
46 | { | |
47 | struct request_queue *q = m->private; | |
48 | ||
49 | spin_lock_irq(&q->requeue_lock); | |
50 | return seq_list_start(&q->requeue_list, *pos); | |
51 | } | |
52 | ||
53 | static void *queue_requeue_list_next(struct seq_file *m, void *v, loff_t *pos) | |
54 | { | |
55 | struct request_queue *q = m->private; | |
56 | ||
57 | return seq_list_next(v, &q->requeue_list, pos); | |
58 | } | |
59 | ||
60 | static void queue_requeue_list_stop(struct seq_file *m, void *v) | |
61 | __releases(&q->requeue_lock) | |
62 | { | |
63 | struct request_queue *q = m->private; | |
64 | ||
65 | spin_unlock_irq(&q->requeue_lock); | |
66 | } | |
67 | ||
68 | static const struct seq_operations queue_requeue_list_seq_ops = { | |
69 | .start = queue_requeue_list_start, | |
70 | .next = queue_requeue_list_next, | |
71 | .stop = queue_requeue_list_stop, | |
72 | .show = blk_mq_debugfs_rq_show, | |
73 | }; | |
74 | ||
91d68905 BVA |
75 | static int blk_flags_show(struct seq_file *m, const unsigned long flags, |
76 | const char *const *flag_name, int flag_name_count) | |
77 | { | |
78 | bool sep = false; | |
79 | int i; | |
80 | ||
81 | for (i = 0; i < sizeof(flags) * BITS_PER_BYTE; i++) { | |
82 | if (!(flags & BIT(i))) | |
83 | continue; | |
84 | if (sep) | |
bec03d6b | 85 | seq_puts(m, "|"); |
91d68905 BVA |
86 | sep = true; |
87 | if (i < flag_name_count && flag_name[i]) | |
88 | seq_puts(m, flag_name[i]); | |
89 | else | |
90 | seq_printf(m, "%d", i); | |
91 | } | |
91d68905 BVA |
92 | return 0; |
93 | } | |
94 | ||
cd84a62e BVA |
95 | static int queue_pm_only_show(void *data, struct seq_file *m) |
96 | { | |
97 | struct request_queue *q = data; | |
98 | ||
99 | seq_printf(m, "%d\n", atomic_read(&q->pm_only)); | |
100 | return 0; | |
101 | } | |
102 | ||
1a435111 | 103 | #define QUEUE_FLAG_NAME(name) [QUEUE_FLAG_##name] = #name |
91d68905 | 104 | static const char *const blk_queue_flag_name[] = { |
1a435111 | 105 | QUEUE_FLAG_NAME(STOPPED), |
1a435111 | 106 | QUEUE_FLAG_NAME(DYING), |
1a435111 OS |
107 | QUEUE_FLAG_NAME(NOMERGES), |
108 | QUEUE_FLAG_NAME(SAME_COMP), | |
109 | QUEUE_FLAG_NAME(FAIL_IO), | |
1a435111 OS |
110 | QUEUE_FLAG_NAME(NONROT), |
111 | QUEUE_FLAG_NAME(IO_STAT), | |
112 | QUEUE_FLAG_NAME(DISCARD), | |
113 | QUEUE_FLAG_NAME(NOXMERGES), | |
114 | QUEUE_FLAG_NAME(ADD_RANDOM), | |
115 | QUEUE_FLAG_NAME(SECERASE), | |
116 | QUEUE_FLAG_NAME(SAME_FORCE), | |
117 | QUEUE_FLAG_NAME(DEAD), | |
118 | QUEUE_FLAG_NAME(INIT_DONE), | |
1a435111 OS |
119 | QUEUE_FLAG_NAME(POLL), |
120 | QUEUE_FLAG_NAME(WC), | |
121 | QUEUE_FLAG_NAME(FUA), | |
1a435111 OS |
122 | QUEUE_FLAG_NAME(DAX), |
123 | QUEUE_FLAG_NAME(STATS), | |
124 | QUEUE_FLAG_NAME(POLL_STATS), | |
125 | QUEUE_FLAG_NAME(REGISTERED), | |
22d53821 BVA |
126 | QUEUE_FLAG_NAME(SCSI_PASSTHROUGH), |
127 | QUEUE_FLAG_NAME(QUIESCED), | |
91d68905 | 128 | }; |
1a435111 | 129 | #undef QUEUE_FLAG_NAME |
91d68905 | 130 | |
f57de23a | 131 | static int queue_state_show(void *data, struct seq_file *m) |
91d68905 | 132 | { |
f57de23a | 133 | struct request_queue *q = data; |
91d68905 BVA |
134 | |
135 | blk_flags_show(m, q->queue_flags, blk_queue_flag_name, | |
136 | ARRAY_SIZE(blk_queue_flag_name)); | |
fd07dc81 | 137 | seq_puts(m, "\n"); |
91d68905 BVA |
138 | return 0; |
139 | } | |
140 | ||
f57de23a OS |
141 | static ssize_t queue_state_write(void *data, const char __user *buf, |
142 | size_t count, loff_t *ppos) | |
91d68905 | 143 | { |
f57de23a | 144 | struct request_queue *q = data; |
71b90511 | 145 | char opbuf[16] = { }, *op; |
91d68905 | 146 | |
18d4d7d0 BVA |
147 | /* |
148 | * The "state" attribute is removed after blk_cleanup_queue() has called | |
149 | * blk_mq_free_queue(). Return if QUEUE_FLAG_DEAD has been set to avoid | |
150 | * triggering a use-after-free. | |
151 | */ | |
152 | if (blk_queue_dead(q)) | |
153 | return -ENOENT; | |
154 | ||
71b90511 | 155 | if (count >= sizeof(opbuf)) { |
c7e4145a OS |
156 | pr_err("%s: operation too long\n", __func__); |
157 | goto inval; | |
158 | } | |
159 | ||
71b90511 | 160 | if (copy_from_user(opbuf, buf, count)) |
91d68905 | 161 | return -EFAULT; |
71b90511 | 162 | op = strstrip(opbuf); |
91d68905 BVA |
163 | if (strcmp(op, "run") == 0) { |
164 | blk_mq_run_hw_queues(q, true); | |
165 | } else if (strcmp(op, "start") == 0) { | |
166 | blk_mq_start_stopped_hw_queues(q, true); | |
edea55ab BVA |
167 | } else if (strcmp(op, "kick") == 0) { |
168 | blk_mq_kick_requeue_list(q); | |
91d68905 | 169 | } else { |
c7e4145a OS |
170 | pr_err("%s: unsupported operation '%s'\n", __func__, op); |
171 | inval: | |
edea55ab | 172 | pr_err("%s: use 'run', 'start' or 'kick'\n", __func__); |
91d68905 BVA |
173 | return -EINVAL; |
174 | } | |
c7e4145a | 175 | return count; |
91d68905 BVA |
176 | } |
177 | ||
f793dfd3 JA |
178 | static int queue_write_hint_show(void *data, struct seq_file *m) |
179 | { | |
180 | struct request_queue *q = data; | |
181 | int i; | |
182 | ||
183 | for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) | |
184 | seq_printf(m, "hint%d: %llu\n", i, q->write_hints[i]); | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
189 | static ssize_t queue_write_hint_store(void *data, const char __user *buf, | |
190 | size_t count, loff_t *ppos) | |
191 | { | |
192 | struct request_queue *q = data; | |
193 | int i; | |
194 | ||
195 | for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) | |
196 | q->write_hints[i] = 0; | |
197 | ||
198 | return count; | |
199 | } | |
200 | ||
1209cb7f BVA |
201 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = { |
202 | { "poll_stat", 0400, queue_poll_stat_show }, | |
203 | { "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops }, | |
cd84a62e | 204 | { "pm_only", 0600, queue_pm_only_show, NULL }, |
1209cb7f BVA |
205 | { "state", 0600, queue_state_show, queue_state_write }, |
206 | { "write_hints", 0600, queue_write_hint_show, queue_write_hint_store }, | |
18bc4230 | 207 | { "zone_wlock", 0400, queue_zone_wlock_show, NULL }, |
1209cb7f BVA |
208 | { }, |
209 | }; | |
34dbad5d | 210 | |
1a435111 | 211 | #define HCTX_STATE_NAME(name) [BLK_MQ_S_##name] = #name |
f5c0b091 | 212 | static const char *const hctx_state_name[] = { |
1a435111 OS |
213 | HCTX_STATE_NAME(STOPPED), |
214 | HCTX_STATE_NAME(TAG_ACTIVE), | |
215 | HCTX_STATE_NAME(SCHED_RESTART), | |
f5c0b091 | 216 | }; |
1a435111 OS |
217 | #undef HCTX_STATE_NAME |
218 | ||
f57de23a | 219 | static int hctx_state_show(void *data, struct seq_file *m) |
9abb2ad2 | 220 | { |
f57de23a | 221 | struct blk_mq_hw_ctx *hctx = data; |
9abb2ad2 | 222 | |
f5c0b091 BVA |
223 | blk_flags_show(m, hctx->state, hctx_state_name, |
224 | ARRAY_SIZE(hctx_state_name)); | |
fd07dc81 | 225 | seq_puts(m, "\n"); |
9abb2ad2 OS |
226 | return 0; |
227 | } | |
228 | ||
1a435111 | 229 | #define BLK_TAG_ALLOC_NAME(name) [BLK_TAG_ALLOC_##name] = #name |
f5c0b091 | 230 | static const char *const alloc_policy_name[] = { |
1a435111 OS |
231 | BLK_TAG_ALLOC_NAME(FIFO), |
232 | BLK_TAG_ALLOC_NAME(RR), | |
f5c0b091 | 233 | }; |
1a435111 | 234 | #undef BLK_TAG_ALLOC_NAME |
f5c0b091 | 235 | |
1a435111 | 236 | #define HCTX_FLAG_NAME(name) [ilog2(BLK_MQ_F_##name)] = #name |
f5c0b091 | 237 | static const char *const hctx_flag_name[] = { |
1a435111 OS |
238 | HCTX_FLAG_NAME(SHOULD_MERGE), |
239 | HCTX_FLAG_NAME(TAG_SHARED), | |
1a435111 OS |
240 | HCTX_FLAG_NAME(BLOCKING), |
241 | HCTX_FLAG_NAME(NO_SCHED), | |
f5c0b091 | 242 | }; |
1a435111 | 243 | #undef HCTX_FLAG_NAME |
f5c0b091 | 244 | |
f57de23a | 245 | static int hctx_flags_show(void *data, struct seq_file *m) |
9abb2ad2 | 246 | { |
f57de23a | 247 | struct blk_mq_hw_ctx *hctx = data; |
f5c0b091 | 248 | const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags); |
9abb2ad2 | 249 | |
f5c0b091 BVA |
250 | seq_puts(m, "alloc_policy="); |
251 | if (alloc_policy < ARRAY_SIZE(alloc_policy_name) && | |
252 | alloc_policy_name[alloc_policy]) | |
253 | seq_puts(m, alloc_policy_name[alloc_policy]); | |
254 | else | |
255 | seq_printf(m, "%d", alloc_policy); | |
256 | seq_puts(m, " "); | |
257 | blk_flags_show(m, | |
258 | hctx->flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy), | |
259 | hctx_flag_name, ARRAY_SIZE(hctx_flag_name)); | |
fd07dc81 | 260 | seq_puts(m, "\n"); |
9abb2ad2 OS |
261 | return 0; |
262 | } | |
263 | ||
1a435111 | 264 | #define CMD_FLAG_NAME(name) [__REQ_##name] = #name |
8658dca8 | 265 | static const char *const cmd_flag_name[] = { |
1a435111 OS |
266 | CMD_FLAG_NAME(FAILFAST_DEV), |
267 | CMD_FLAG_NAME(FAILFAST_TRANSPORT), | |
268 | CMD_FLAG_NAME(FAILFAST_DRIVER), | |
269 | CMD_FLAG_NAME(SYNC), | |
270 | CMD_FLAG_NAME(META), | |
271 | CMD_FLAG_NAME(PRIO), | |
272 | CMD_FLAG_NAME(NOMERGE), | |
273 | CMD_FLAG_NAME(IDLE), | |
274 | CMD_FLAG_NAME(INTEGRITY), | |
275 | CMD_FLAG_NAME(FUA), | |
276 | CMD_FLAG_NAME(PREFLUSH), | |
277 | CMD_FLAG_NAME(RAHEAD), | |
278 | CMD_FLAG_NAME(BACKGROUND), | |
22d53821 | 279 | CMD_FLAG_NAME(NOWAIT), |
1c26010c JW |
280 | CMD_FLAG_NAME(NOUNMAP), |
281 | CMD_FLAG_NAME(HIPRI), | |
8658dca8 | 282 | }; |
1a435111 | 283 | #undef CMD_FLAG_NAME |
8658dca8 | 284 | |
1a435111 | 285 | #define RQF_NAME(name) [ilog2((__force u32)RQF_##name)] = #name |
8658dca8 | 286 | static const char *const rqf_name[] = { |
1a435111 | 287 | RQF_NAME(SORTED), |
85ba3eff | 288 | RQF_NAME(STARTED), |
1a435111 OS |
289 | RQF_NAME(SOFTBARRIER), |
290 | RQF_NAME(FLUSH_SEQ), | |
291 | RQF_NAME(MIXED_MERGE), | |
292 | RQF_NAME(MQ_INFLIGHT), | |
293 | RQF_NAME(DONTPREP), | |
294 | RQF_NAME(PREEMPT), | |
295 | RQF_NAME(COPY_USER), | |
296 | RQF_NAME(FAILED), | |
297 | RQF_NAME(QUIET), | |
298 | RQF_NAME(ELVPRIV), | |
299 | RQF_NAME(IO_STAT), | |
300 | RQF_NAME(ALLOCED), | |
301 | RQF_NAME(PM), | |
302 | RQF_NAME(HASHED), | |
303 | RQF_NAME(STATS), | |
304 | RQF_NAME(SPECIAL_PAYLOAD), | |
5d75d3f2 | 305 | RQF_NAME(ZONE_WRITE_LOCKED), |
76a86f9d | 306 | RQF_NAME(MQ_POLL_SLEPT), |
8658dca8 | 307 | }; |
1a435111 | 308 | #undef RQF_NAME |
8658dca8 | 309 | |
ec6dcf63 BVA |
310 | static const char *const blk_mq_rq_state_name_array[] = { |
311 | [MQ_RQ_IDLE] = "idle", | |
312 | [MQ_RQ_IN_FLIGHT] = "in_flight", | |
313 | [MQ_RQ_COMPLETE] = "complete", | |
314 | }; | |
315 | ||
316 | static const char *blk_mq_rq_state_name(enum mq_rq_state rq_state) | |
317 | { | |
a1e79188 | 318 | if (WARN_ON_ONCE((unsigned int)rq_state >= |
ec6dcf63 BVA |
319 | ARRAY_SIZE(blk_mq_rq_state_name_array))) |
320 | return "(?)"; | |
321 | return blk_mq_rq_state_name_array[rq_state]; | |
322 | } | |
323 | ||
daaadb3e | 324 | int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq) |
950cd7e9 | 325 | { |
2836ee4b | 326 | const struct blk_mq_ops *const mq_ops = rq->q->mq_ops; |
f9bc64a0 | 327 | const unsigned int op = req_op(rq); |
874c893b | 328 | const char *op_str = blk_op_str(op); |
950cd7e9 | 329 | |
8658dca8 | 330 | seq_printf(m, "%p {.op=", rq); |
874c893b | 331 | if (strcmp(op_str, "UNKNOWN") == 0) |
3f6d385f | 332 | seq_printf(m, "%u", op); |
8658dca8 | 333 | else |
874c893b | 334 | seq_printf(m, "%s", op_str); |
8658dca8 BVA |
335 | seq_puts(m, ", .cmd_flags="); |
336 | blk_flags_show(m, rq->cmd_flags & ~REQ_OP_MASK, cmd_flag_name, | |
337 | ARRAY_SIZE(cmd_flag_name)); | |
338 | seq_puts(m, ", .rq_flags="); | |
339 | blk_flags_show(m, (__force unsigned int)rq->rq_flags, rqf_name, | |
340 | ARRAY_SIZE(rqf_name)); | |
ec6dcf63 | 341 | seq_printf(m, ", .state=%s", blk_mq_rq_state_name(blk_mq_rq_state(rq))); |
2836ee4b | 342 | seq_printf(m, ", .tag=%d, .internal_tag=%d", rq->tag, |
8658dca8 | 343 | rq->internal_tag); |
2836ee4b BVA |
344 | if (mq_ops->show_rq) |
345 | mq_ops->show_rq(m, rq); | |
346 | seq_puts(m, "}\n"); | |
950cd7e9 OS |
347 | return 0; |
348 | } | |
daaadb3e OS |
349 | EXPORT_SYMBOL_GPL(__blk_mq_debugfs_rq_show); |
350 | ||
351 | int blk_mq_debugfs_rq_show(struct seq_file *m, void *v) | |
352 | { | |
353 | return __blk_mq_debugfs_rq_show(m, list_entry_rq(v)); | |
354 | } | |
16b738f6 | 355 | EXPORT_SYMBOL_GPL(blk_mq_debugfs_rq_show); |
950cd7e9 OS |
356 | |
357 | static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos) | |
f3bcb0e6 | 358 | __acquires(&hctx->lock) |
950cd7e9 OS |
359 | { |
360 | struct blk_mq_hw_ctx *hctx = m->private; | |
361 | ||
362 | spin_lock(&hctx->lock); | |
363 | return seq_list_start(&hctx->dispatch, *pos); | |
364 | } | |
365 | ||
366 | static void *hctx_dispatch_next(struct seq_file *m, void *v, loff_t *pos) | |
367 | { | |
368 | struct blk_mq_hw_ctx *hctx = m->private; | |
369 | ||
370 | return seq_list_next(v, &hctx->dispatch, pos); | |
371 | } | |
372 | ||
373 | static void hctx_dispatch_stop(struct seq_file *m, void *v) | |
f3bcb0e6 | 374 | __releases(&hctx->lock) |
950cd7e9 OS |
375 | { |
376 | struct blk_mq_hw_ctx *hctx = m->private; | |
377 | ||
378 | spin_unlock(&hctx->lock); | |
379 | } | |
380 | ||
381 | static const struct seq_operations hctx_dispatch_seq_ops = { | |
382 | .start = hctx_dispatch_start, | |
383 | .next = hctx_dispatch_next, | |
384 | .stop = hctx_dispatch_stop, | |
385 | .show = blk_mq_debugfs_rq_show, | |
386 | }; | |
387 | ||
2720bab5 BVA |
388 | struct show_busy_params { |
389 | struct seq_file *m; | |
390 | struct blk_mq_hw_ctx *hctx; | |
391 | }; | |
392 | ||
393 | /* | |
394 | * Note: the state of a request may change while this function is in progress, | |
7baa8572 JA |
395 | * e.g. due to a concurrent blk_mq_finish_request() call. Returns true to |
396 | * keep iterating requests. | |
2720bab5 | 397 | */ |
7baa8572 | 398 | static bool hctx_show_busy_rq(struct request *rq, void *data, bool reserved) |
2720bab5 BVA |
399 | { |
400 | const struct show_busy_params *params = data; | |
401 | ||
ea4f995e | 402 | if (rq->mq_hctx == params->hctx) |
2720bab5 BVA |
403 | __blk_mq_debugfs_rq_show(params->m, |
404 | list_entry_rq(&rq->queuelist)); | |
7baa8572 JA |
405 | |
406 | return true; | |
2720bab5 BVA |
407 | } |
408 | ||
409 | static int hctx_busy_show(void *data, struct seq_file *m) | |
410 | { | |
411 | struct blk_mq_hw_ctx *hctx = data; | |
412 | struct show_busy_params params = { .m = m, .hctx = hctx }; | |
413 | ||
414 | blk_mq_tagset_busy_iter(hctx->queue->tag_set, hctx_show_busy_rq, | |
415 | ¶ms); | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
346fc108 ML |
420 | static const char *const hctx_types[] = { |
421 | [HCTX_TYPE_DEFAULT] = "default", | |
422 | [HCTX_TYPE_READ] = "read", | |
423 | [HCTX_TYPE_POLL] = "poll", | |
424 | }; | |
425 | ||
426 | static int hctx_type_show(void *data, struct seq_file *m) | |
427 | { | |
428 | struct blk_mq_hw_ctx *hctx = data; | |
429 | ||
430 | BUILD_BUG_ON(ARRAY_SIZE(hctx_types) != HCTX_MAX_TYPES); | |
431 | seq_printf(m, "%s\n", hctx_types[hctx->type]); | |
432 | return 0; | |
433 | } | |
434 | ||
f57de23a | 435 | static int hctx_ctx_map_show(void *data, struct seq_file *m) |
0bfa5288 | 436 | { |
f57de23a | 437 | struct blk_mq_hw_ctx *hctx = data; |
0bfa5288 OS |
438 | |
439 | sbitmap_bitmap_show(&hctx->ctx_map, m); | |
440 | return 0; | |
441 | } | |
442 | ||
d96b37c0 OS |
443 | static void blk_mq_debugfs_tags_show(struct seq_file *m, |
444 | struct blk_mq_tags *tags) | |
445 | { | |
446 | seq_printf(m, "nr_tags=%u\n", tags->nr_tags); | |
447 | seq_printf(m, "nr_reserved_tags=%u\n", tags->nr_reserved_tags); | |
448 | seq_printf(m, "active_queues=%d\n", | |
449 | atomic_read(&tags->active_queues)); | |
450 | ||
451 | seq_puts(m, "\nbitmap_tags:\n"); | |
452 | sbitmap_queue_show(&tags->bitmap_tags, m); | |
453 | ||
454 | if (tags->nr_reserved_tags) { | |
455 | seq_puts(m, "\nbreserved_tags:\n"); | |
456 | sbitmap_queue_show(&tags->breserved_tags, m); | |
457 | } | |
458 | } | |
459 | ||
f57de23a | 460 | static int hctx_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 461 | { |
f57de23a | 462 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 463 | struct request_queue *q = hctx->queue; |
8c0f14ea | 464 | int res; |
d96b37c0 | 465 | |
8c0f14ea BVA |
466 | res = mutex_lock_interruptible(&q->sysfs_lock); |
467 | if (res) | |
468 | goto out; | |
d96b37c0 OS |
469 | if (hctx->tags) |
470 | blk_mq_debugfs_tags_show(m, hctx->tags); | |
471 | mutex_unlock(&q->sysfs_lock); | |
472 | ||
8c0f14ea BVA |
473 | out: |
474 | return res; | |
d96b37c0 OS |
475 | } |
476 | ||
f57de23a | 477 | static int hctx_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 478 | { |
f57de23a | 479 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 480 | struct request_queue *q = hctx->queue; |
8c0f14ea | 481 | int res; |
d7e3621a | 482 | |
8c0f14ea BVA |
483 | res = mutex_lock_interruptible(&q->sysfs_lock); |
484 | if (res) | |
485 | goto out; | |
d7e3621a OS |
486 | if (hctx->tags) |
487 | sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); | |
488 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
489 | |
490 | out: | |
491 | return res; | |
d7e3621a OS |
492 | } |
493 | ||
f57de23a | 494 | static int hctx_sched_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 495 | { |
f57de23a | 496 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 497 | struct request_queue *q = hctx->queue; |
8c0f14ea | 498 | int res; |
d96b37c0 | 499 | |
8c0f14ea BVA |
500 | res = mutex_lock_interruptible(&q->sysfs_lock); |
501 | if (res) | |
502 | goto out; | |
d96b37c0 OS |
503 | if (hctx->sched_tags) |
504 | blk_mq_debugfs_tags_show(m, hctx->sched_tags); | |
505 | mutex_unlock(&q->sysfs_lock); | |
506 | ||
8c0f14ea BVA |
507 | out: |
508 | return res; | |
d96b37c0 OS |
509 | } |
510 | ||
f57de23a | 511 | static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 512 | { |
f57de23a | 513 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 514 | struct request_queue *q = hctx->queue; |
8c0f14ea | 515 | int res; |
d7e3621a | 516 | |
8c0f14ea BVA |
517 | res = mutex_lock_interruptible(&q->sysfs_lock); |
518 | if (res) | |
519 | goto out; | |
d7e3621a OS |
520 | if (hctx->sched_tags) |
521 | sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); | |
522 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
523 | |
524 | out: | |
525 | return res; | |
d7e3621a OS |
526 | } |
527 | ||
f57de23a | 528 | static int hctx_io_poll_show(void *data, struct seq_file *m) |
be215473 | 529 | { |
f57de23a | 530 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
531 | |
532 | seq_printf(m, "considered=%lu\n", hctx->poll_considered); | |
533 | seq_printf(m, "invoked=%lu\n", hctx->poll_invoked); | |
534 | seq_printf(m, "success=%lu\n", hctx->poll_success); | |
535 | return 0; | |
536 | } | |
537 | ||
f57de23a | 538 | static ssize_t hctx_io_poll_write(void *data, const char __user *buf, |
be215473 OS |
539 | size_t count, loff_t *ppos) |
540 | { | |
f57de23a | 541 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
542 | |
543 | hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0; | |
544 | return count; | |
545 | } | |
546 | ||
f57de23a | 547 | static int hctx_dispatched_show(void *data, struct seq_file *m) |
be215473 | 548 | { |
f57de23a | 549 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
550 | int i; |
551 | ||
552 | seq_printf(m, "%8u\t%lu\n", 0U, hctx->dispatched[0]); | |
553 | ||
554 | for (i = 1; i < BLK_MQ_MAX_DISPATCH_ORDER - 1; i++) { | |
555 | unsigned int d = 1U << (i - 1); | |
556 | ||
557 | seq_printf(m, "%8u\t%lu\n", d, hctx->dispatched[i]); | |
558 | } | |
559 | ||
560 | seq_printf(m, "%8u+\t%lu\n", 1U << (i - 1), hctx->dispatched[i]); | |
561 | return 0; | |
562 | } | |
563 | ||
f57de23a | 564 | static ssize_t hctx_dispatched_write(void *data, const char __user *buf, |
be215473 OS |
565 | size_t count, loff_t *ppos) |
566 | { | |
f57de23a | 567 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
568 | int i; |
569 | ||
570 | for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) | |
571 | hctx->dispatched[i] = 0; | |
572 | return count; | |
573 | } | |
574 | ||
f57de23a | 575 | static int hctx_queued_show(void *data, struct seq_file *m) |
4a46f05e | 576 | { |
f57de23a | 577 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
578 | |
579 | seq_printf(m, "%lu\n", hctx->queued); | |
580 | return 0; | |
581 | } | |
582 | ||
f57de23a | 583 | static ssize_t hctx_queued_write(void *data, const char __user *buf, |
4a46f05e OS |
584 | size_t count, loff_t *ppos) |
585 | { | |
f57de23a | 586 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
587 | |
588 | hctx->queued = 0; | |
589 | return count; | |
590 | } | |
591 | ||
f57de23a | 592 | static int hctx_run_show(void *data, struct seq_file *m) |
4a46f05e | 593 | { |
f57de23a | 594 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
595 | |
596 | seq_printf(m, "%lu\n", hctx->run); | |
597 | return 0; | |
598 | } | |
599 | ||
f57de23a OS |
600 | static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count, |
601 | loff_t *ppos) | |
4a46f05e | 602 | { |
f57de23a | 603 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
604 | |
605 | hctx->run = 0; | |
606 | return count; | |
607 | } | |
608 | ||
f57de23a | 609 | static int hctx_active_show(void *data, struct seq_file *m) |
4a46f05e | 610 | { |
f57de23a | 611 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
612 | |
613 | seq_printf(m, "%d\n", atomic_read(&hctx->nr_active)); | |
614 | return 0; | |
615 | } | |
616 | ||
6e768717 ML |
617 | static int hctx_dispatch_busy_show(void *data, struct seq_file *m) |
618 | { | |
619 | struct blk_mq_hw_ctx *hctx = data; | |
620 | ||
621 | seq_printf(m, "%u\n", hctx->dispatch_busy); | |
622 | return 0; | |
623 | } | |
624 | ||
c16d6b5a ML |
625 | #define CTX_RQ_SEQ_OPS(name, type) \ |
626 | static void *ctx_##name##_rq_list_start(struct seq_file *m, loff_t *pos) \ | |
627 | __acquires(&ctx->lock) \ | |
628 | { \ | |
629 | struct blk_mq_ctx *ctx = m->private; \ | |
630 | \ | |
631 | spin_lock(&ctx->lock); \ | |
632 | return seq_list_start(&ctx->rq_lists[type], *pos); \ | |
633 | } \ | |
634 | \ | |
635 | static void *ctx_##name##_rq_list_next(struct seq_file *m, void *v, \ | |
636 | loff_t *pos) \ | |
637 | { \ | |
638 | struct blk_mq_ctx *ctx = m->private; \ | |
639 | \ | |
640 | return seq_list_next(v, &ctx->rq_lists[type], pos); \ | |
641 | } \ | |
642 | \ | |
643 | static void ctx_##name##_rq_list_stop(struct seq_file *m, void *v) \ | |
644 | __releases(&ctx->lock) \ | |
645 | { \ | |
646 | struct blk_mq_ctx *ctx = m->private; \ | |
647 | \ | |
648 | spin_unlock(&ctx->lock); \ | |
649 | } \ | |
650 | \ | |
651 | static const struct seq_operations ctx_##name##_rq_list_seq_ops = { \ | |
652 | .start = ctx_##name##_rq_list_start, \ | |
653 | .next = ctx_##name##_rq_list_next, \ | |
654 | .stop = ctx_##name##_rq_list_stop, \ | |
655 | .show = blk_mq_debugfs_rq_show, \ | |
656 | } | |
657 | ||
658 | CTX_RQ_SEQ_OPS(default, HCTX_TYPE_DEFAULT); | |
659 | CTX_RQ_SEQ_OPS(read, HCTX_TYPE_READ); | |
660 | CTX_RQ_SEQ_OPS(poll, HCTX_TYPE_POLL); | |
950cd7e9 | 661 | |
f57de23a | 662 | static int ctx_dispatched_show(void *data, struct seq_file *m) |
4a46f05e | 663 | { |
f57de23a | 664 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
665 | |
666 | seq_printf(m, "%lu %lu\n", ctx->rq_dispatched[1], ctx->rq_dispatched[0]); | |
667 | return 0; | |
668 | } | |
669 | ||
f57de23a | 670 | static ssize_t ctx_dispatched_write(void *data, const char __user *buf, |
4a46f05e OS |
671 | size_t count, loff_t *ppos) |
672 | { | |
f57de23a | 673 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
674 | |
675 | ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0; | |
676 | return count; | |
677 | } | |
678 | ||
f57de23a | 679 | static int ctx_merged_show(void *data, struct seq_file *m) |
4a46f05e | 680 | { |
f57de23a | 681 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
682 | |
683 | seq_printf(m, "%lu\n", ctx->rq_merged); | |
684 | return 0; | |
685 | } | |
686 | ||
f57de23a OS |
687 | static ssize_t ctx_merged_write(void *data, const char __user *buf, |
688 | size_t count, loff_t *ppos) | |
4a46f05e | 689 | { |
f57de23a | 690 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
691 | |
692 | ctx->rq_merged = 0; | |
693 | return count; | |
694 | } | |
695 | ||
f57de23a | 696 | static int ctx_completed_show(void *data, struct seq_file *m) |
4a46f05e | 697 | { |
f57de23a | 698 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
699 | |
700 | seq_printf(m, "%lu %lu\n", ctx->rq_completed[1], ctx->rq_completed[0]); | |
701 | return 0; | |
702 | } | |
703 | ||
f57de23a OS |
704 | static ssize_t ctx_completed_write(void *data, const char __user *buf, |
705 | size_t count, loff_t *ppos) | |
4a46f05e | 706 | { |
f57de23a OS |
707 | struct blk_mq_ctx *ctx = data; |
708 | ||
709 | ctx->rq_completed[0] = ctx->rq_completed[1] = 0; | |
710 | return count; | |
4a46f05e OS |
711 | } |
712 | ||
f57de23a OS |
713 | static int blk_mq_debugfs_show(struct seq_file *m, void *v) |
714 | { | |
715 | const struct blk_mq_debugfs_attr *attr = m->private; | |
716 | void *data = d_inode(m->file->f_path.dentry->d_parent)->i_private; | |
717 | ||
718 | return attr->show(data, m); | |
719 | } | |
720 | ||
721 | static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf, | |
722 | size_t count, loff_t *ppos) | |
4a46f05e OS |
723 | { |
724 | struct seq_file *m = file->private_data; | |
f57de23a OS |
725 | const struct blk_mq_debugfs_attr *attr = m->private; |
726 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
4a46f05e | 727 | |
6b136a24 EG |
728 | /* |
729 | * Attributes that only implement .seq_ops are read-only and 'attr' is | |
730 | * the same with 'data' in this case. | |
731 | */ | |
732 | if (attr == data || !attr->write) | |
f57de23a OS |
733 | return -EPERM; |
734 | ||
735 | return attr->write(data, buf, count, ppos); | |
736 | } | |
737 | ||
738 | static int blk_mq_debugfs_open(struct inode *inode, struct file *file) | |
739 | { | |
740 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
741 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
742 | struct seq_file *m; | |
743 | int ret; | |
744 | ||
745 | if (attr->seq_ops) { | |
746 | ret = seq_open(file, attr->seq_ops); | |
747 | if (!ret) { | |
748 | m = file->private_data; | |
749 | m->private = data; | |
750 | } | |
751 | return ret; | |
752 | } | |
753 | ||
754 | if (WARN_ON_ONCE(!attr->show)) | |
755 | return -EPERM; | |
756 | ||
757 | return single_open(file, blk_mq_debugfs_show, inode->i_private); | |
4a46f05e OS |
758 | } |
759 | ||
f57de23a OS |
760 | static int blk_mq_debugfs_release(struct inode *inode, struct file *file) |
761 | { | |
762 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
763 | ||
764 | if (attr->show) | |
765 | return single_release(inode, file); | |
ee1e0359 CK |
766 | |
767 | return seq_release(inode, file); | |
f57de23a OS |
768 | } |
769 | ||
f8465933 | 770 | static const struct file_operations blk_mq_debugfs_fops = { |
f57de23a | 771 | .open = blk_mq_debugfs_open, |
4a46f05e | 772 | .read = seq_read, |
f57de23a | 773 | .write = blk_mq_debugfs_write, |
4a46f05e | 774 | .llseek = seq_lseek, |
f57de23a | 775 | .release = blk_mq_debugfs_release, |
4a46f05e OS |
776 | }; |
777 | ||
07e4fead | 778 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { |
f57de23a OS |
779 | {"state", 0400, hctx_state_show}, |
780 | {"flags", 0400, hctx_flags_show}, | |
781 | {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops}, | |
2720bab5 | 782 | {"busy", 0400, hctx_busy_show}, |
f57de23a OS |
783 | {"ctx_map", 0400, hctx_ctx_map_show}, |
784 | {"tags", 0400, hctx_tags_show}, | |
785 | {"tags_bitmap", 0400, hctx_tags_bitmap_show}, | |
786 | {"sched_tags", 0400, hctx_sched_tags_show}, | |
787 | {"sched_tags_bitmap", 0400, hctx_sched_tags_bitmap_show}, | |
788 | {"io_poll", 0600, hctx_io_poll_show, hctx_io_poll_write}, | |
789 | {"dispatched", 0600, hctx_dispatched_show, hctx_dispatched_write}, | |
790 | {"queued", 0600, hctx_queued_show, hctx_queued_write}, | |
791 | {"run", 0600, hctx_run_show, hctx_run_write}, | |
792 | {"active", 0400, hctx_active_show}, | |
6e768717 | 793 | {"dispatch_busy", 0400, hctx_dispatch_busy_show}, |
346fc108 | 794 | {"type", 0400, hctx_type_show}, |
72f2f8f6 | 795 | {}, |
07e4fead OS |
796 | }; |
797 | ||
798 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { | |
c16d6b5a ML |
799 | {"default_rq_list", 0400, .seq_ops = &ctx_default_rq_list_seq_ops}, |
800 | {"read_rq_list", 0400, .seq_ops = &ctx_read_rq_list_seq_ops}, | |
801 | {"poll_rq_list", 0400, .seq_ops = &ctx_poll_rq_list_seq_ops}, | |
f57de23a OS |
802 | {"dispatched", 0600, ctx_dispatched_show, ctx_dispatched_write}, |
803 | {"merged", 0600, ctx_merged_show, ctx_merged_write}, | |
804 | {"completed", 0600, ctx_completed_show, ctx_completed_write}, | |
72f2f8f6 | 805 | {}, |
07e4fead OS |
806 | }; |
807 | ||
6cfc0081 | 808 | static void debugfs_create_files(struct dentry *parent, void *data, |
9c1051aa OS |
809 | const struct blk_mq_debugfs_attr *attr) |
810 | { | |
36991ca6 | 811 | if (IS_ERR_OR_NULL(parent)) |
6cfc0081 | 812 | return; |
36991ca6 | 813 | |
9c1051aa OS |
814 | d_inode(parent)->i_private = data; |
815 | ||
6cfc0081 GKH |
816 | for (; attr->name; attr++) |
817 | debugfs_create_file(attr->name, attr->mode, parent, | |
818 | (void *)attr, &blk_mq_debugfs_fops); | |
9c1051aa OS |
819 | } |
820 | ||
6cfc0081 | 821 | void blk_mq_debugfs_register(struct request_queue *q) |
07e4fead | 822 | { |
9c1051aa OS |
823 | struct blk_mq_hw_ctx *hctx; |
824 | int i; | |
825 | ||
4c9e4019 BVA |
826 | q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent), |
827 | blk_debugfs_root); | |
07e4fead | 828 | |
6cfc0081 | 829 | debugfs_create_files(q->debugfs_dir, q, blk_mq_debugfs_queue_attrs); |
07e4fead | 830 | |
9c1051aa | 831 | /* |
70e62f4b | 832 | * blk_mq_init_sched() attempted to do this already, but q->debugfs_dir |
9c1051aa OS |
833 | * didn't exist yet (because we don't know what to name the directory |
834 | * until the queue is registered to a gendisk). | |
835 | */ | |
70e62f4b OS |
836 | if (q->elevator && !q->sched_debugfs_dir) |
837 | blk_mq_debugfs_register_sched(q); | |
838 | ||
839 | /* Similarly, blk_mq_init_hctx() couldn't do this previously. */ | |
9c1051aa | 840 | queue_for_each_hw_ctx(q, hctx, i) { |
6cfc0081 GKH |
841 | if (!hctx->debugfs_dir) |
842 | blk_mq_debugfs_register_hctx(q, hctx); | |
843 | if (q->elevator && !hctx->sched_debugfs_dir) | |
844 | blk_mq_debugfs_register_sched_hctx(q, hctx); | |
9c1051aa OS |
845 | } |
846 | ||
cc56694f ML |
847 | if (q->rq_qos) { |
848 | struct rq_qos *rqos = q->rq_qos; | |
849 | ||
850 | while (rqos) { | |
851 | blk_mq_debugfs_register_rqos(rqos); | |
852 | rqos = rqos->next; | |
853 | } | |
854 | } | |
07e4fead OS |
855 | } |
856 | ||
857 | void blk_mq_debugfs_unregister(struct request_queue *q) | |
858 | { | |
859 | debugfs_remove_recursive(q->debugfs_dir); | |
d332ce09 | 860 | q->sched_debugfs_dir = NULL; |
07e4fead OS |
861 | q->debugfs_dir = NULL; |
862 | } | |
863 | ||
6cfc0081 GKH |
864 | static void blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx, |
865 | struct blk_mq_ctx *ctx) | |
07e4fead OS |
866 | { |
867 | struct dentry *ctx_dir; | |
868 | char name[20]; | |
07e4fead OS |
869 | |
870 | snprintf(name, sizeof(name), "cpu%u", ctx->cpu); | |
9c1051aa | 871 | ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir); |
07e4fead | 872 | |
6cfc0081 | 873 | debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs); |
07e4fead OS |
874 | } |
875 | ||
6cfc0081 GKH |
876 | void blk_mq_debugfs_register_hctx(struct request_queue *q, |
877 | struct blk_mq_hw_ctx *hctx) | |
07e4fead OS |
878 | { |
879 | struct blk_mq_ctx *ctx; | |
07e4fead OS |
880 | char name[20]; |
881 | int i; | |
882 | ||
88aabbd7 | 883 | snprintf(name, sizeof(name), "hctx%u", hctx->queue_num); |
9c1051aa | 884 | hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir); |
07e4fead | 885 | |
6cfc0081 | 886 | debugfs_create_files(hctx->debugfs_dir, hctx, blk_mq_debugfs_hctx_attrs); |
9c1051aa | 887 | |
6cfc0081 GKH |
888 | hctx_for_each_ctx(hctx, ctx, i) |
889 | blk_mq_debugfs_register_ctx(hctx, ctx); | |
9c1051aa OS |
890 | } |
891 | ||
892 | void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx) | |
893 | { | |
894 | debugfs_remove_recursive(hctx->debugfs_dir); | |
d332ce09 | 895 | hctx->sched_debugfs_dir = NULL; |
9c1051aa | 896 | hctx->debugfs_dir = NULL; |
07e4fead OS |
897 | } |
898 | ||
6cfc0081 | 899 | void blk_mq_debugfs_register_hctxs(struct request_queue *q) |
07e4fead OS |
900 | { |
901 | struct blk_mq_hw_ctx *hctx; | |
902 | int i; | |
903 | ||
6cfc0081 GKH |
904 | queue_for_each_hw_ctx(q, hctx, i) |
905 | blk_mq_debugfs_register_hctx(q, hctx); | |
07e4fead OS |
906 | } |
907 | ||
9c1051aa | 908 | void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) |
07e4fead | 909 | { |
9c1051aa OS |
910 | struct blk_mq_hw_ctx *hctx; |
911 | int i; | |
912 | ||
913 | queue_for_each_hw_ctx(q, hctx, i) | |
914 | blk_mq_debugfs_unregister_hctx(hctx); | |
07e4fead | 915 | } |
d332ce09 | 916 | |
6cfc0081 | 917 | void blk_mq_debugfs_register_sched(struct request_queue *q) |
d332ce09 OS |
918 | { |
919 | struct elevator_type *e = q->elevator->type; | |
920 | ||
7e41c3c9 GKH |
921 | /* |
922 | * If the parent directory has not been created yet, return, we will be | |
923 | * called again later on and the directory/files will be created then. | |
924 | */ | |
925 | if (!q->debugfs_dir) | |
926 | return; | |
927 | ||
d332ce09 | 928 | if (!e->queue_debugfs_attrs) |
6cfc0081 | 929 | return; |
d332ce09 OS |
930 | |
931 | q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir); | |
d332ce09 | 932 | |
6cfc0081 | 933 | debugfs_create_files(q->sched_debugfs_dir, q, e->queue_debugfs_attrs); |
d332ce09 OS |
934 | } |
935 | ||
936 | void blk_mq_debugfs_unregister_sched(struct request_queue *q) | |
937 | { | |
938 | debugfs_remove_recursive(q->sched_debugfs_dir); | |
939 | q->sched_debugfs_dir = NULL; | |
940 | } | |
941 | ||
cc56694f ML |
942 | void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos) |
943 | { | |
944 | debugfs_remove_recursive(rqos->debugfs_dir); | |
945 | rqos->debugfs_dir = NULL; | |
946 | } | |
947 | ||
6cfc0081 | 948 | void blk_mq_debugfs_register_rqos(struct rq_qos *rqos) |
cc56694f ML |
949 | { |
950 | struct request_queue *q = rqos->q; | |
951 | const char *dir_name = rq_qos_id_to_name(rqos->id); | |
952 | ||
cc56694f | 953 | if (rqos->debugfs_dir || !rqos->ops->debugfs_attrs) |
6cfc0081 | 954 | return; |
cc56694f | 955 | |
6cfc0081 | 956 | if (!q->rqos_debugfs_dir) |
cc56694f ML |
957 | q->rqos_debugfs_dir = debugfs_create_dir("rqos", |
958 | q->debugfs_dir); | |
cc56694f ML |
959 | |
960 | rqos->debugfs_dir = debugfs_create_dir(dir_name, | |
961 | rqos->q->rqos_debugfs_dir); | |
cc56694f | 962 | |
6cfc0081 | 963 | debugfs_create_files(rqos->debugfs_dir, rqos, rqos->ops->debugfs_attrs); |
cc56694f ML |
964 | } |
965 | ||
966 | void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q) | |
967 | { | |
968 | debugfs_remove_recursive(q->rqos_debugfs_dir); | |
969 | q->rqos_debugfs_dir = NULL; | |
970 | } | |
971 | ||
6cfc0081 GKH |
972 | void blk_mq_debugfs_register_sched_hctx(struct request_queue *q, |
973 | struct blk_mq_hw_ctx *hctx) | |
d332ce09 OS |
974 | { |
975 | struct elevator_type *e = q->elevator->type; | |
976 | ||
d332ce09 | 977 | if (!e->hctx_debugfs_attrs) |
6cfc0081 | 978 | return; |
d332ce09 OS |
979 | |
980 | hctx->sched_debugfs_dir = debugfs_create_dir("sched", | |
981 | hctx->debugfs_dir); | |
6cfc0081 GKH |
982 | debugfs_create_files(hctx->sched_debugfs_dir, hctx, |
983 | e->hctx_debugfs_attrs); | |
d332ce09 OS |
984 | } |
985 | ||
986 | void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx) | |
987 | { | |
988 | debugfs_remove_recursive(hctx->sched_debugfs_dir); | |
989 | hctx->sched_debugfs_dir = NULL; | |
990 | } |