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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), | |
1a435111 OS |
295 | RQF_NAME(FAILED), |
296 | RQF_NAME(QUIET), | |
297 | RQF_NAME(ELVPRIV), | |
298 | RQF_NAME(IO_STAT), | |
299 | RQF_NAME(ALLOCED), | |
300 | RQF_NAME(PM), | |
301 | RQF_NAME(HASHED), | |
302 | RQF_NAME(STATS), | |
303 | RQF_NAME(SPECIAL_PAYLOAD), | |
5d75d3f2 | 304 | RQF_NAME(ZONE_WRITE_LOCKED), |
76a86f9d | 305 | RQF_NAME(MQ_POLL_SLEPT), |
8658dca8 | 306 | }; |
1a435111 | 307 | #undef RQF_NAME |
8658dca8 | 308 | |
ec6dcf63 BVA |
309 | static const char *const blk_mq_rq_state_name_array[] = { |
310 | [MQ_RQ_IDLE] = "idle", | |
311 | [MQ_RQ_IN_FLIGHT] = "in_flight", | |
312 | [MQ_RQ_COMPLETE] = "complete", | |
313 | }; | |
314 | ||
315 | static const char *blk_mq_rq_state_name(enum mq_rq_state rq_state) | |
316 | { | |
a1e79188 | 317 | if (WARN_ON_ONCE((unsigned int)rq_state >= |
ec6dcf63 BVA |
318 | ARRAY_SIZE(blk_mq_rq_state_name_array))) |
319 | return "(?)"; | |
320 | return blk_mq_rq_state_name_array[rq_state]; | |
321 | } | |
322 | ||
daaadb3e | 323 | int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq) |
950cd7e9 | 324 | { |
2836ee4b | 325 | const struct blk_mq_ops *const mq_ops = rq->q->mq_ops; |
f9bc64a0 | 326 | const unsigned int op = req_op(rq); |
874c893b | 327 | const char *op_str = blk_op_str(op); |
950cd7e9 | 328 | |
8658dca8 | 329 | seq_printf(m, "%p {.op=", rq); |
874c893b | 330 | if (strcmp(op_str, "UNKNOWN") == 0) |
3f6d385f | 331 | seq_printf(m, "%u", op); |
8658dca8 | 332 | else |
874c893b | 333 | seq_printf(m, "%s", op_str); |
8658dca8 BVA |
334 | seq_puts(m, ", .cmd_flags="); |
335 | blk_flags_show(m, rq->cmd_flags & ~REQ_OP_MASK, cmd_flag_name, | |
336 | ARRAY_SIZE(cmd_flag_name)); | |
337 | seq_puts(m, ", .rq_flags="); | |
338 | blk_flags_show(m, (__force unsigned int)rq->rq_flags, rqf_name, | |
339 | ARRAY_SIZE(rqf_name)); | |
ec6dcf63 | 340 | seq_printf(m, ", .state=%s", blk_mq_rq_state_name(blk_mq_rq_state(rq))); |
2836ee4b | 341 | seq_printf(m, ", .tag=%d, .internal_tag=%d", rq->tag, |
8658dca8 | 342 | rq->internal_tag); |
2836ee4b BVA |
343 | if (mq_ops->show_rq) |
344 | mq_ops->show_rq(m, rq); | |
345 | seq_puts(m, "}\n"); | |
950cd7e9 OS |
346 | return 0; |
347 | } | |
daaadb3e OS |
348 | EXPORT_SYMBOL_GPL(__blk_mq_debugfs_rq_show); |
349 | ||
350 | int blk_mq_debugfs_rq_show(struct seq_file *m, void *v) | |
351 | { | |
352 | return __blk_mq_debugfs_rq_show(m, list_entry_rq(v)); | |
353 | } | |
16b738f6 | 354 | EXPORT_SYMBOL_GPL(blk_mq_debugfs_rq_show); |
950cd7e9 OS |
355 | |
356 | static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos) | |
f3bcb0e6 | 357 | __acquires(&hctx->lock) |
950cd7e9 OS |
358 | { |
359 | struct blk_mq_hw_ctx *hctx = m->private; | |
360 | ||
361 | spin_lock(&hctx->lock); | |
362 | return seq_list_start(&hctx->dispatch, *pos); | |
363 | } | |
364 | ||
365 | static void *hctx_dispatch_next(struct seq_file *m, void *v, loff_t *pos) | |
366 | { | |
367 | struct blk_mq_hw_ctx *hctx = m->private; | |
368 | ||
369 | return seq_list_next(v, &hctx->dispatch, pos); | |
370 | } | |
371 | ||
372 | static void hctx_dispatch_stop(struct seq_file *m, void *v) | |
f3bcb0e6 | 373 | __releases(&hctx->lock) |
950cd7e9 OS |
374 | { |
375 | struct blk_mq_hw_ctx *hctx = m->private; | |
376 | ||
377 | spin_unlock(&hctx->lock); | |
378 | } | |
379 | ||
380 | static const struct seq_operations hctx_dispatch_seq_ops = { | |
381 | .start = hctx_dispatch_start, | |
382 | .next = hctx_dispatch_next, | |
383 | .stop = hctx_dispatch_stop, | |
384 | .show = blk_mq_debugfs_rq_show, | |
385 | }; | |
386 | ||
2720bab5 BVA |
387 | struct show_busy_params { |
388 | struct seq_file *m; | |
389 | struct blk_mq_hw_ctx *hctx; | |
390 | }; | |
391 | ||
392 | /* | |
393 | * Note: the state of a request may change while this function is in progress, | |
7baa8572 JA |
394 | * e.g. due to a concurrent blk_mq_finish_request() call. Returns true to |
395 | * keep iterating requests. | |
2720bab5 | 396 | */ |
7baa8572 | 397 | static bool hctx_show_busy_rq(struct request *rq, void *data, bool reserved) |
2720bab5 BVA |
398 | { |
399 | const struct show_busy_params *params = data; | |
400 | ||
ea4f995e | 401 | if (rq->mq_hctx == params->hctx) |
2720bab5 BVA |
402 | __blk_mq_debugfs_rq_show(params->m, |
403 | list_entry_rq(&rq->queuelist)); | |
7baa8572 JA |
404 | |
405 | return true; | |
2720bab5 BVA |
406 | } |
407 | ||
408 | static int hctx_busy_show(void *data, struct seq_file *m) | |
409 | { | |
410 | struct blk_mq_hw_ctx *hctx = data; | |
411 | struct show_busy_params params = { .m = m, .hctx = hctx }; | |
412 | ||
413 | blk_mq_tagset_busy_iter(hctx->queue->tag_set, hctx_show_busy_rq, | |
414 | ¶ms); | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
346fc108 ML |
419 | static const char *const hctx_types[] = { |
420 | [HCTX_TYPE_DEFAULT] = "default", | |
421 | [HCTX_TYPE_READ] = "read", | |
422 | [HCTX_TYPE_POLL] = "poll", | |
423 | }; | |
424 | ||
425 | static int hctx_type_show(void *data, struct seq_file *m) | |
426 | { | |
427 | struct blk_mq_hw_ctx *hctx = data; | |
428 | ||
429 | BUILD_BUG_ON(ARRAY_SIZE(hctx_types) != HCTX_MAX_TYPES); | |
430 | seq_printf(m, "%s\n", hctx_types[hctx->type]); | |
431 | return 0; | |
432 | } | |
433 | ||
f57de23a | 434 | static int hctx_ctx_map_show(void *data, struct seq_file *m) |
0bfa5288 | 435 | { |
f57de23a | 436 | struct blk_mq_hw_ctx *hctx = data; |
0bfa5288 OS |
437 | |
438 | sbitmap_bitmap_show(&hctx->ctx_map, m); | |
439 | return 0; | |
440 | } | |
441 | ||
d96b37c0 OS |
442 | static void blk_mq_debugfs_tags_show(struct seq_file *m, |
443 | struct blk_mq_tags *tags) | |
444 | { | |
445 | seq_printf(m, "nr_tags=%u\n", tags->nr_tags); | |
446 | seq_printf(m, "nr_reserved_tags=%u\n", tags->nr_reserved_tags); | |
447 | seq_printf(m, "active_queues=%d\n", | |
448 | atomic_read(&tags->active_queues)); | |
449 | ||
450 | seq_puts(m, "\nbitmap_tags:\n"); | |
451 | sbitmap_queue_show(&tags->bitmap_tags, m); | |
452 | ||
453 | if (tags->nr_reserved_tags) { | |
454 | seq_puts(m, "\nbreserved_tags:\n"); | |
455 | sbitmap_queue_show(&tags->breserved_tags, m); | |
456 | } | |
457 | } | |
458 | ||
f57de23a | 459 | static int hctx_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 460 | { |
f57de23a | 461 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 462 | struct request_queue *q = hctx->queue; |
8c0f14ea | 463 | int res; |
d96b37c0 | 464 | |
8c0f14ea BVA |
465 | res = mutex_lock_interruptible(&q->sysfs_lock); |
466 | if (res) | |
467 | goto out; | |
d96b37c0 OS |
468 | if (hctx->tags) |
469 | blk_mq_debugfs_tags_show(m, hctx->tags); | |
470 | mutex_unlock(&q->sysfs_lock); | |
471 | ||
8c0f14ea BVA |
472 | out: |
473 | return res; | |
d96b37c0 OS |
474 | } |
475 | ||
f57de23a | 476 | static int hctx_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 477 | { |
f57de23a | 478 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 479 | struct request_queue *q = hctx->queue; |
8c0f14ea | 480 | int res; |
d7e3621a | 481 | |
8c0f14ea BVA |
482 | res = mutex_lock_interruptible(&q->sysfs_lock); |
483 | if (res) | |
484 | goto out; | |
d7e3621a OS |
485 | if (hctx->tags) |
486 | sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); | |
487 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
488 | |
489 | out: | |
490 | return res; | |
d7e3621a OS |
491 | } |
492 | ||
f57de23a | 493 | static int hctx_sched_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 494 | { |
f57de23a | 495 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 496 | struct request_queue *q = hctx->queue; |
8c0f14ea | 497 | int res; |
d96b37c0 | 498 | |
8c0f14ea BVA |
499 | res = mutex_lock_interruptible(&q->sysfs_lock); |
500 | if (res) | |
501 | goto out; | |
d96b37c0 OS |
502 | if (hctx->sched_tags) |
503 | blk_mq_debugfs_tags_show(m, hctx->sched_tags); | |
504 | mutex_unlock(&q->sysfs_lock); | |
505 | ||
8c0f14ea BVA |
506 | out: |
507 | return res; | |
d96b37c0 OS |
508 | } |
509 | ||
f57de23a | 510 | static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 511 | { |
f57de23a | 512 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 513 | struct request_queue *q = hctx->queue; |
8c0f14ea | 514 | int res; |
d7e3621a | 515 | |
8c0f14ea BVA |
516 | res = mutex_lock_interruptible(&q->sysfs_lock); |
517 | if (res) | |
518 | goto out; | |
d7e3621a OS |
519 | if (hctx->sched_tags) |
520 | sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); | |
521 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
522 | |
523 | out: | |
524 | return res; | |
d7e3621a OS |
525 | } |
526 | ||
f57de23a | 527 | static int hctx_io_poll_show(void *data, struct seq_file *m) |
be215473 | 528 | { |
f57de23a | 529 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
530 | |
531 | seq_printf(m, "considered=%lu\n", hctx->poll_considered); | |
532 | seq_printf(m, "invoked=%lu\n", hctx->poll_invoked); | |
533 | seq_printf(m, "success=%lu\n", hctx->poll_success); | |
534 | return 0; | |
535 | } | |
536 | ||
f57de23a | 537 | static ssize_t hctx_io_poll_write(void *data, const char __user *buf, |
be215473 OS |
538 | size_t count, loff_t *ppos) |
539 | { | |
f57de23a | 540 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
541 | |
542 | hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0; | |
543 | return count; | |
544 | } | |
545 | ||
f57de23a | 546 | static int hctx_dispatched_show(void *data, struct seq_file *m) |
be215473 | 547 | { |
f57de23a | 548 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
549 | int i; |
550 | ||
551 | seq_printf(m, "%8u\t%lu\n", 0U, hctx->dispatched[0]); | |
552 | ||
553 | for (i = 1; i < BLK_MQ_MAX_DISPATCH_ORDER - 1; i++) { | |
554 | unsigned int d = 1U << (i - 1); | |
555 | ||
556 | seq_printf(m, "%8u\t%lu\n", d, hctx->dispatched[i]); | |
557 | } | |
558 | ||
559 | seq_printf(m, "%8u+\t%lu\n", 1U << (i - 1), hctx->dispatched[i]); | |
560 | return 0; | |
561 | } | |
562 | ||
f57de23a | 563 | static ssize_t hctx_dispatched_write(void *data, const char __user *buf, |
be215473 OS |
564 | size_t count, loff_t *ppos) |
565 | { | |
f57de23a | 566 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
567 | int i; |
568 | ||
569 | for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) | |
570 | hctx->dispatched[i] = 0; | |
571 | return count; | |
572 | } | |
573 | ||
f57de23a | 574 | static int hctx_queued_show(void *data, struct seq_file *m) |
4a46f05e | 575 | { |
f57de23a | 576 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
577 | |
578 | seq_printf(m, "%lu\n", hctx->queued); | |
579 | return 0; | |
580 | } | |
581 | ||
f57de23a | 582 | static ssize_t hctx_queued_write(void *data, const char __user *buf, |
4a46f05e OS |
583 | size_t count, loff_t *ppos) |
584 | { | |
f57de23a | 585 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
586 | |
587 | hctx->queued = 0; | |
588 | return count; | |
589 | } | |
590 | ||
f57de23a | 591 | static int hctx_run_show(void *data, struct seq_file *m) |
4a46f05e | 592 | { |
f57de23a | 593 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
594 | |
595 | seq_printf(m, "%lu\n", hctx->run); | |
596 | return 0; | |
597 | } | |
598 | ||
f57de23a OS |
599 | static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count, |
600 | loff_t *ppos) | |
4a46f05e | 601 | { |
f57de23a | 602 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
603 | |
604 | hctx->run = 0; | |
605 | return count; | |
606 | } | |
607 | ||
f57de23a | 608 | static int hctx_active_show(void *data, struct seq_file *m) |
4a46f05e | 609 | { |
f57de23a | 610 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
611 | |
612 | seq_printf(m, "%d\n", atomic_read(&hctx->nr_active)); | |
613 | return 0; | |
614 | } | |
615 | ||
6e768717 ML |
616 | static int hctx_dispatch_busy_show(void *data, struct seq_file *m) |
617 | { | |
618 | struct blk_mq_hw_ctx *hctx = data; | |
619 | ||
620 | seq_printf(m, "%u\n", hctx->dispatch_busy); | |
621 | return 0; | |
622 | } | |
623 | ||
c16d6b5a ML |
624 | #define CTX_RQ_SEQ_OPS(name, type) \ |
625 | static void *ctx_##name##_rq_list_start(struct seq_file *m, loff_t *pos) \ | |
626 | __acquires(&ctx->lock) \ | |
627 | { \ | |
628 | struct blk_mq_ctx *ctx = m->private; \ | |
629 | \ | |
630 | spin_lock(&ctx->lock); \ | |
631 | return seq_list_start(&ctx->rq_lists[type], *pos); \ | |
632 | } \ | |
633 | \ | |
634 | static void *ctx_##name##_rq_list_next(struct seq_file *m, void *v, \ | |
635 | loff_t *pos) \ | |
636 | { \ | |
637 | struct blk_mq_ctx *ctx = m->private; \ | |
638 | \ | |
639 | return seq_list_next(v, &ctx->rq_lists[type], pos); \ | |
640 | } \ | |
641 | \ | |
642 | static void ctx_##name##_rq_list_stop(struct seq_file *m, void *v) \ | |
643 | __releases(&ctx->lock) \ | |
644 | { \ | |
645 | struct blk_mq_ctx *ctx = m->private; \ | |
646 | \ | |
647 | spin_unlock(&ctx->lock); \ | |
648 | } \ | |
649 | \ | |
650 | static const struct seq_operations ctx_##name##_rq_list_seq_ops = { \ | |
651 | .start = ctx_##name##_rq_list_start, \ | |
652 | .next = ctx_##name##_rq_list_next, \ | |
653 | .stop = ctx_##name##_rq_list_stop, \ | |
654 | .show = blk_mq_debugfs_rq_show, \ | |
655 | } | |
656 | ||
657 | CTX_RQ_SEQ_OPS(default, HCTX_TYPE_DEFAULT); | |
658 | CTX_RQ_SEQ_OPS(read, HCTX_TYPE_READ); | |
659 | CTX_RQ_SEQ_OPS(poll, HCTX_TYPE_POLL); | |
950cd7e9 | 660 | |
f57de23a | 661 | static int ctx_dispatched_show(void *data, struct seq_file *m) |
4a46f05e | 662 | { |
f57de23a | 663 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
664 | |
665 | seq_printf(m, "%lu %lu\n", ctx->rq_dispatched[1], ctx->rq_dispatched[0]); | |
666 | return 0; | |
667 | } | |
668 | ||
f57de23a | 669 | static ssize_t ctx_dispatched_write(void *data, const char __user *buf, |
4a46f05e OS |
670 | size_t count, loff_t *ppos) |
671 | { | |
f57de23a | 672 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
673 | |
674 | ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0; | |
675 | return count; | |
676 | } | |
677 | ||
f57de23a | 678 | static int ctx_merged_show(void *data, struct seq_file *m) |
4a46f05e | 679 | { |
f57de23a | 680 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
681 | |
682 | seq_printf(m, "%lu\n", ctx->rq_merged); | |
683 | return 0; | |
684 | } | |
685 | ||
f57de23a OS |
686 | static ssize_t ctx_merged_write(void *data, const char __user *buf, |
687 | size_t count, loff_t *ppos) | |
4a46f05e | 688 | { |
f57de23a | 689 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
690 | |
691 | ctx->rq_merged = 0; | |
692 | return count; | |
693 | } | |
694 | ||
f57de23a | 695 | static int ctx_completed_show(void *data, struct seq_file *m) |
4a46f05e | 696 | { |
f57de23a | 697 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
698 | |
699 | seq_printf(m, "%lu %lu\n", ctx->rq_completed[1], ctx->rq_completed[0]); | |
700 | return 0; | |
701 | } | |
702 | ||
f57de23a OS |
703 | static ssize_t ctx_completed_write(void *data, const char __user *buf, |
704 | size_t count, loff_t *ppos) | |
4a46f05e | 705 | { |
f57de23a OS |
706 | struct blk_mq_ctx *ctx = data; |
707 | ||
708 | ctx->rq_completed[0] = ctx->rq_completed[1] = 0; | |
709 | return count; | |
4a46f05e OS |
710 | } |
711 | ||
f57de23a OS |
712 | static int blk_mq_debugfs_show(struct seq_file *m, void *v) |
713 | { | |
714 | const struct blk_mq_debugfs_attr *attr = m->private; | |
715 | void *data = d_inode(m->file->f_path.dentry->d_parent)->i_private; | |
716 | ||
717 | return attr->show(data, m); | |
718 | } | |
719 | ||
720 | static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf, | |
721 | size_t count, loff_t *ppos) | |
4a46f05e OS |
722 | { |
723 | struct seq_file *m = file->private_data; | |
f57de23a OS |
724 | const struct blk_mq_debugfs_attr *attr = m->private; |
725 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
4a46f05e | 726 | |
6b136a24 EG |
727 | /* |
728 | * Attributes that only implement .seq_ops are read-only and 'attr' is | |
729 | * the same with 'data' in this case. | |
730 | */ | |
731 | if (attr == data || !attr->write) | |
f57de23a OS |
732 | return -EPERM; |
733 | ||
734 | return attr->write(data, buf, count, ppos); | |
735 | } | |
736 | ||
737 | static int blk_mq_debugfs_open(struct inode *inode, struct file *file) | |
738 | { | |
739 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
740 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
741 | struct seq_file *m; | |
742 | int ret; | |
743 | ||
744 | if (attr->seq_ops) { | |
745 | ret = seq_open(file, attr->seq_ops); | |
746 | if (!ret) { | |
747 | m = file->private_data; | |
748 | m->private = data; | |
749 | } | |
750 | return ret; | |
751 | } | |
752 | ||
753 | if (WARN_ON_ONCE(!attr->show)) | |
754 | return -EPERM; | |
755 | ||
756 | return single_open(file, blk_mq_debugfs_show, inode->i_private); | |
4a46f05e OS |
757 | } |
758 | ||
f57de23a OS |
759 | static int blk_mq_debugfs_release(struct inode *inode, struct file *file) |
760 | { | |
761 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
762 | ||
763 | if (attr->show) | |
764 | return single_release(inode, file); | |
ee1e0359 CK |
765 | |
766 | return seq_release(inode, file); | |
f57de23a OS |
767 | } |
768 | ||
f8465933 | 769 | static const struct file_operations blk_mq_debugfs_fops = { |
f57de23a | 770 | .open = blk_mq_debugfs_open, |
4a46f05e | 771 | .read = seq_read, |
f57de23a | 772 | .write = blk_mq_debugfs_write, |
4a46f05e | 773 | .llseek = seq_lseek, |
f57de23a | 774 | .release = blk_mq_debugfs_release, |
4a46f05e OS |
775 | }; |
776 | ||
07e4fead | 777 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { |
f57de23a OS |
778 | {"state", 0400, hctx_state_show}, |
779 | {"flags", 0400, hctx_flags_show}, | |
780 | {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops}, | |
2720bab5 | 781 | {"busy", 0400, hctx_busy_show}, |
f57de23a OS |
782 | {"ctx_map", 0400, hctx_ctx_map_show}, |
783 | {"tags", 0400, hctx_tags_show}, | |
784 | {"tags_bitmap", 0400, hctx_tags_bitmap_show}, | |
785 | {"sched_tags", 0400, hctx_sched_tags_show}, | |
786 | {"sched_tags_bitmap", 0400, hctx_sched_tags_bitmap_show}, | |
787 | {"io_poll", 0600, hctx_io_poll_show, hctx_io_poll_write}, | |
788 | {"dispatched", 0600, hctx_dispatched_show, hctx_dispatched_write}, | |
789 | {"queued", 0600, hctx_queued_show, hctx_queued_write}, | |
790 | {"run", 0600, hctx_run_show, hctx_run_write}, | |
791 | {"active", 0400, hctx_active_show}, | |
6e768717 | 792 | {"dispatch_busy", 0400, hctx_dispatch_busy_show}, |
346fc108 | 793 | {"type", 0400, hctx_type_show}, |
72f2f8f6 | 794 | {}, |
07e4fead OS |
795 | }; |
796 | ||
797 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { | |
c16d6b5a ML |
798 | {"default_rq_list", 0400, .seq_ops = &ctx_default_rq_list_seq_ops}, |
799 | {"read_rq_list", 0400, .seq_ops = &ctx_read_rq_list_seq_ops}, | |
800 | {"poll_rq_list", 0400, .seq_ops = &ctx_poll_rq_list_seq_ops}, | |
f57de23a OS |
801 | {"dispatched", 0600, ctx_dispatched_show, ctx_dispatched_write}, |
802 | {"merged", 0600, ctx_merged_show, ctx_merged_write}, | |
803 | {"completed", 0600, ctx_completed_show, ctx_completed_write}, | |
72f2f8f6 | 804 | {}, |
07e4fead OS |
805 | }; |
806 | ||
6cfc0081 | 807 | static void debugfs_create_files(struct dentry *parent, void *data, |
9c1051aa OS |
808 | const struct blk_mq_debugfs_attr *attr) |
809 | { | |
36991ca6 | 810 | if (IS_ERR_OR_NULL(parent)) |
6cfc0081 | 811 | return; |
36991ca6 | 812 | |
9c1051aa OS |
813 | d_inode(parent)->i_private = data; |
814 | ||
6cfc0081 GKH |
815 | for (; attr->name; attr++) |
816 | debugfs_create_file(attr->name, attr->mode, parent, | |
817 | (void *)attr, &blk_mq_debugfs_fops); | |
9c1051aa OS |
818 | } |
819 | ||
6cfc0081 | 820 | void blk_mq_debugfs_register(struct request_queue *q) |
07e4fead | 821 | { |
9c1051aa OS |
822 | struct blk_mq_hw_ctx *hctx; |
823 | int i; | |
824 | ||
4c9e4019 BVA |
825 | q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent), |
826 | blk_debugfs_root); | |
07e4fead | 827 | |
6cfc0081 | 828 | debugfs_create_files(q->debugfs_dir, q, blk_mq_debugfs_queue_attrs); |
07e4fead | 829 | |
9c1051aa | 830 | /* |
70e62f4b | 831 | * blk_mq_init_sched() attempted to do this already, but q->debugfs_dir |
9c1051aa OS |
832 | * didn't exist yet (because we don't know what to name the directory |
833 | * until the queue is registered to a gendisk). | |
834 | */ | |
70e62f4b OS |
835 | if (q->elevator && !q->sched_debugfs_dir) |
836 | blk_mq_debugfs_register_sched(q); | |
837 | ||
838 | /* Similarly, blk_mq_init_hctx() couldn't do this previously. */ | |
9c1051aa | 839 | queue_for_each_hw_ctx(q, hctx, i) { |
6cfc0081 GKH |
840 | if (!hctx->debugfs_dir) |
841 | blk_mq_debugfs_register_hctx(q, hctx); | |
842 | if (q->elevator && !hctx->sched_debugfs_dir) | |
843 | blk_mq_debugfs_register_sched_hctx(q, hctx); | |
9c1051aa OS |
844 | } |
845 | ||
cc56694f ML |
846 | if (q->rq_qos) { |
847 | struct rq_qos *rqos = q->rq_qos; | |
848 | ||
849 | while (rqos) { | |
850 | blk_mq_debugfs_register_rqos(rqos); | |
851 | rqos = rqos->next; | |
852 | } | |
853 | } | |
07e4fead OS |
854 | } |
855 | ||
856 | void blk_mq_debugfs_unregister(struct request_queue *q) | |
857 | { | |
858 | debugfs_remove_recursive(q->debugfs_dir); | |
d332ce09 | 859 | q->sched_debugfs_dir = NULL; |
07e4fead OS |
860 | q->debugfs_dir = NULL; |
861 | } | |
862 | ||
6cfc0081 GKH |
863 | static void blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx, |
864 | struct blk_mq_ctx *ctx) | |
07e4fead OS |
865 | { |
866 | struct dentry *ctx_dir; | |
867 | char name[20]; | |
07e4fead OS |
868 | |
869 | snprintf(name, sizeof(name), "cpu%u", ctx->cpu); | |
9c1051aa | 870 | ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir); |
07e4fead | 871 | |
6cfc0081 | 872 | debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs); |
07e4fead OS |
873 | } |
874 | ||
6cfc0081 GKH |
875 | void blk_mq_debugfs_register_hctx(struct request_queue *q, |
876 | struct blk_mq_hw_ctx *hctx) | |
07e4fead OS |
877 | { |
878 | struct blk_mq_ctx *ctx; | |
07e4fead OS |
879 | char name[20]; |
880 | int i; | |
881 | ||
88aabbd7 | 882 | snprintf(name, sizeof(name), "hctx%u", hctx->queue_num); |
9c1051aa | 883 | hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir); |
07e4fead | 884 | |
6cfc0081 | 885 | debugfs_create_files(hctx->debugfs_dir, hctx, blk_mq_debugfs_hctx_attrs); |
9c1051aa | 886 | |
6cfc0081 GKH |
887 | hctx_for_each_ctx(hctx, ctx, i) |
888 | blk_mq_debugfs_register_ctx(hctx, ctx); | |
9c1051aa OS |
889 | } |
890 | ||
891 | void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx) | |
892 | { | |
893 | debugfs_remove_recursive(hctx->debugfs_dir); | |
d332ce09 | 894 | hctx->sched_debugfs_dir = NULL; |
9c1051aa | 895 | hctx->debugfs_dir = NULL; |
07e4fead OS |
896 | } |
897 | ||
6cfc0081 | 898 | void blk_mq_debugfs_register_hctxs(struct request_queue *q) |
07e4fead OS |
899 | { |
900 | struct blk_mq_hw_ctx *hctx; | |
901 | int i; | |
902 | ||
6cfc0081 GKH |
903 | queue_for_each_hw_ctx(q, hctx, i) |
904 | blk_mq_debugfs_register_hctx(q, hctx); | |
07e4fead OS |
905 | } |
906 | ||
9c1051aa | 907 | void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) |
07e4fead | 908 | { |
9c1051aa OS |
909 | struct blk_mq_hw_ctx *hctx; |
910 | int i; | |
911 | ||
912 | queue_for_each_hw_ctx(q, hctx, i) | |
913 | blk_mq_debugfs_unregister_hctx(hctx); | |
07e4fead | 914 | } |
d332ce09 | 915 | |
6cfc0081 | 916 | void blk_mq_debugfs_register_sched(struct request_queue *q) |
d332ce09 OS |
917 | { |
918 | struct elevator_type *e = q->elevator->type; | |
919 | ||
7e41c3c9 GKH |
920 | /* |
921 | * If the parent directory has not been created yet, return, we will be | |
922 | * called again later on and the directory/files will be created then. | |
923 | */ | |
924 | if (!q->debugfs_dir) | |
925 | return; | |
926 | ||
d332ce09 | 927 | if (!e->queue_debugfs_attrs) |
6cfc0081 | 928 | return; |
d332ce09 OS |
929 | |
930 | q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir); | |
d332ce09 | 931 | |
6cfc0081 | 932 | debugfs_create_files(q->sched_debugfs_dir, q, e->queue_debugfs_attrs); |
d332ce09 OS |
933 | } |
934 | ||
935 | void blk_mq_debugfs_unregister_sched(struct request_queue *q) | |
936 | { | |
937 | debugfs_remove_recursive(q->sched_debugfs_dir); | |
938 | q->sched_debugfs_dir = NULL; | |
939 | } | |
940 | ||
cc56694f ML |
941 | void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos) |
942 | { | |
943 | debugfs_remove_recursive(rqos->debugfs_dir); | |
944 | rqos->debugfs_dir = NULL; | |
945 | } | |
946 | ||
6cfc0081 | 947 | void blk_mq_debugfs_register_rqos(struct rq_qos *rqos) |
cc56694f ML |
948 | { |
949 | struct request_queue *q = rqos->q; | |
950 | const char *dir_name = rq_qos_id_to_name(rqos->id); | |
951 | ||
cc56694f | 952 | if (rqos->debugfs_dir || !rqos->ops->debugfs_attrs) |
6cfc0081 | 953 | return; |
cc56694f | 954 | |
6cfc0081 | 955 | if (!q->rqos_debugfs_dir) |
cc56694f ML |
956 | q->rqos_debugfs_dir = debugfs_create_dir("rqos", |
957 | q->debugfs_dir); | |
cc56694f ML |
958 | |
959 | rqos->debugfs_dir = debugfs_create_dir(dir_name, | |
960 | rqos->q->rqos_debugfs_dir); | |
cc56694f | 961 | |
6cfc0081 | 962 | debugfs_create_files(rqos->debugfs_dir, rqos, rqos->ops->debugfs_attrs); |
cc56694f ML |
963 | } |
964 | ||
965 | void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q) | |
966 | { | |
967 | debugfs_remove_recursive(q->rqos_debugfs_dir); | |
968 | q->rqos_debugfs_dir = NULL; | |
969 | } | |
970 | ||
6cfc0081 GKH |
971 | void blk_mq_debugfs_register_sched_hctx(struct request_queue *q, |
972 | struct blk_mq_hw_ctx *hctx) | |
d332ce09 OS |
973 | { |
974 | struct elevator_type *e = q->elevator->type; | |
975 | ||
d332ce09 | 976 | if (!e->hctx_debugfs_attrs) |
6cfc0081 | 977 | return; |
d332ce09 OS |
978 | |
979 | hctx->sched_debugfs_dir = debugfs_create_dir("sched", | |
980 | hctx->debugfs_dir); | |
6cfc0081 GKH |
981 | debugfs_create_files(hctx->sched_debugfs_dir, hctx, |
982 | e->hctx_debugfs_attrs); | |
d332ce09 OS |
983 | } |
984 | ||
985 | void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx) | |
986 | { | |
987 | debugfs_remove_recursive(hctx->sched_debugfs_dir); | |
988 | hctx->sched_debugfs_dir = NULL; | |
989 | } |