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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), | |
bfe373f6 HT |
128 | QUEUE_FLAG_NAME(PCI_P2PDMA), |
129 | QUEUE_FLAG_NAME(ZONE_RESETALL), | |
130 | QUEUE_FLAG_NAME(RQ_ALLOC_TIME), | |
91d68905 | 131 | }; |
1a435111 | 132 | #undef QUEUE_FLAG_NAME |
91d68905 | 133 | |
f57de23a | 134 | static int queue_state_show(void *data, struct seq_file *m) |
91d68905 | 135 | { |
f57de23a | 136 | struct request_queue *q = data; |
91d68905 BVA |
137 | |
138 | blk_flags_show(m, q->queue_flags, blk_queue_flag_name, | |
139 | ARRAY_SIZE(blk_queue_flag_name)); | |
fd07dc81 | 140 | seq_puts(m, "\n"); |
91d68905 BVA |
141 | return 0; |
142 | } | |
143 | ||
f57de23a OS |
144 | static ssize_t queue_state_write(void *data, const char __user *buf, |
145 | size_t count, loff_t *ppos) | |
91d68905 | 146 | { |
f57de23a | 147 | struct request_queue *q = data; |
71b90511 | 148 | char opbuf[16] = { }, *op; |
91d68905 | 149 | |
18d4d7d0 BVA |
150 | /* |
151 | * The "state" attribute is removed after blk_cleanup_queue() has called | |
152 | * blk_mq_free_queue(). Return if QUEUE_FLAG_DEAD has been set to avoid | |
153 | * triggering a use-after-free. | |
154 | */ | |
155 | if (blk_queue_dead(q)) | |
156 | return -ENOENT; | |
157 | ||
71b90511 | 158 | if (count >= sizeof(opbuf)) { |
c7e4145a OS |
159 | pr_err("%s: operation too long\n", __func__); |
160 | goto inval; | |
161 | } | |
162 | ||
71b90511 | 163 | if (copy_from_user(opbuf, buf, count)) |
91d68905 | 164 | return -EFAULT; |
71b90511 | 165 | op = strstrip(opbuf); |
91d68905 BVA |
166 | if (strcmp(op, "run") == 0) { |
167 | blk_mq_run_hw_queues(q, true); | |
168 | } else if (strcmp(op, "start") == 0) { | |
169 | blk_mq_start_stopped_hw_queues(q, true); | |
edea55ab BVA |
170 | } else if (strcmp(op, "kick") == 0) { |
171 | blk_mq_kick_requeue_list(q); | |
91d68905 | 172 | } else { |
c7e4145a OS |
173 | pr_err("%s: unsupported operation '%s'\n", __func__, op); |
174 | inval: | |
edea55ab | 175 | pr_err("%s: use 'run', 'start' or 'kick'\n", __func__); |
91d68905 BVA |
176 | return -EINVAL; |
177 | } | |
c7e4145a | 178 | return count; |
91d68905 BVA |
179 | } |
180 | ||
f793dfd3 JA |
181 | static int queue_write_hint_show(void *data, struct seq_file *m) |
182 | { | |
183 | struct request_queue *q = data; | |
184 | int i; | |
185 | ||
186 | for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) | |
187 | seq_printf(m, "hint%d: %llu\n", i, q->write_hints[i]); | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | static ssize_t queue_write_hint_store(void *data, const char __user *buf, | |
193 | size_t count, loff_t *ppos) | |
194 | { | |
195 | struct request_queue *q = data; | |
196 | int i; | |
197 | ||
198 | for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) | |
199 | q->write_hints[i] = 0; | |
200 | ||
201 | return count; | |
202 | } | |
203 | ||
1209cb7f BVA |
204 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = { |
205 | { "poll_stat", 0400, queue_poll_stat_show }, | |
206 | { "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops }, | |
cd84a62e | 207 | { "pm_only", 0600, queue_pm_only_show, NULL }, |
1209cb7f BVA |
208 | { "state", 0600, queue_state_show, queue_state_write }, |
209 | { "write_hints", 0600, queue_write_hint_show, queue_write_hint_store }, | |
18bc4230 | 210 | { "zone_wlock", 0400, queue_zone_wlock_show, NULL }, |
1209cb7f BVA |
211 | { }, |
212 | }; | |
34dbad5d | 213 | |
1a435111 | 214 | #define HCTX_STATE_NAME(name) [BLK_MQ_S_##name] = #name |
f5c0b091 | 215 | static const char *const hctx_state_name[] = { |
1a435111 OS |
216 | HCTX_STATE_NAME(STOPPED), |
217 | HCTX_STATE_NAME(TAG_ACTIVE), | |
218 | HCTX_STATE_NAME(SCHED_RESTART), | |
bf0beec0 | 219 | HCTX_STATE_NAME(INACTIVE), |
f5c0b091 | 220 | }; |
1a435111 OS |
221 | #undef HCTX_STATE_NAME |
222 | ||
f57de23a | 223 | static int hctx_state_show(void *data, struct seq_file *m) |
9abb2ad2 | 224 | { |
f57de23a | 225 | struct blk_mq_hw_ctx *hctx = data; |
9abb2ad2 | 226 | |
f5c0b091 BVA |
227 | blk_flags_show(m, hctx->state, hctx_state_name, |
228 | ARRAY_SIZE(hctx_state_name)); | |
fd07dc81 | 229 | seq_puts(m, "\n"); |
9abb2ad2 OS |
230 | return 0; |
231 | } | |
232 | ||
1a435111 | 233 | #define BLK_TAG_ALLOC_NAME(name) [BLK_TAG_ALLOC_##name] = #name |
f5c0b091 | 234 | static const char *const alloc_policy_name[] = { |
1a435111 OS |
235 | BLK_TAG_ALLOC_NAME(FIFO), |
236 | BLK_TAG_ALLOC_NAME(RR), | |
f5c0b091 | 237 | }; |
1a435111 | 238 | #undef BLK_TAG_ALLOC_NAME |
f5c0b091 | 239 | |
1a435111 | 240 | #define HCTX_FLAG_NAME(name) [ilog2(BLK_MQ_F_##name)] = #name |
f5c0b091 | 241 | static const char *const hctx_flag_name[] = { |
1a435111 OS |
242 | HCTX_FLAG_NAME(SHOULD_MERGE), |
243 | HCTX_FLAG_NAME(TAG_SHARED), | |
1a435111 OS |
244 | HCTX_FLAG_NAME(BLOCKING), |
245 | HCTX_FLAG_NAME(NO_SCHED), | |
bf0beec0 | 246 | HCTX_FLAG_NAME(STACKING), |
f5c0b091 | 247 | }; |
1a435111 | 248 | #undef HCTX_FLAG_NAME |
f5c0b091 | 249 | |
f57de23a | 250 | static int hctx_flags_show(void *data, struct seq_file *m) |
9abb2ad2 | 251 | { |
f57de23a | 252 | struct blk_mq_hw_ctx *hctx = data; |
f5c0b091 | 253 | const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags); |
9abb2ad2 | 254 | |
f5c0b091 BVA |
255 | seq_puts(m, "alloc_policy="); |
256 | if (alloc_policy < ARRAY_SIZE(alloc_policy_name) && | |
257 | alloc_policy_name[alloc_policy]) | |
258 | seq_puts(m, alloc_policy_name[alloc_policy]); | |
259 | else | |
260 | seq_printf(m, "%d", alloc_policy); | |
261 | seq_puts(m, " "); | |
262 | blk_flags_show(m, | |
263 | hctx->flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy), | |
264 | hctx_flag_name, ARRAY_SIZE(hctx_flag_name)); | |
fd07dc81 | 265 | seq_puts(m, "\n"); |
9abb2ad2 OS |
266 | return 0; |
267 | } | |
268 | ||
1a435111 | 269 | #define CMD_FLAG_NAME(name) [__REQ_##name] = #name |
8658dca8 | 270 | static const char *const cmd_flag_name[] = { |
1a435111 OS |
271 | CMD_FLAG_NAME(FAILFAST_DEV), |
272 | CMD_FLAG_NAME(FAILFAST_TRANSPORT), | |
273 | CMD_FLAG_NAME(FAILFAST_DRIVER), | |
274 | CMD_FLAG_NAME(SYNC), | |
275 | CMD_FLAG_NAME(META), | |
276 | CMD_FLAG_NAME(PRIO), | |
277 | CMD_FLAG_NAME(NOMERGE), | |
278 | CMD_FLAG_NAME(IDLE), | |
279 | CMD_FLAG_NAME(INTEGRITY), | |
280 | CMD_FLAG_NAME(FUA), | |
281 | CMD_FLAG_NAME(PREFLUSH), | |
282 | CMD_FLAG_NAME(RAHEAD), | |
283 | CMD_FLAG_NAME(BACKGROUND), | |
22d53821 | 284 | CMD_FLAG_NAME(NOWAIT), |
1c26010c JW |
285 | CMD_FLAG_NAME(NOUNMAP), |
286 | CMD_FLAG_NAME(HIPRI), | |
8658dca8 | 287 | }; |
1a435111 | 288 | #undef CMD_FLAG_NAME |
8658dca8 | 289 | |
1a435111 | 290 | #define RQF_NAME(name) [ilog2((__force u32)RQF_##name)] = #name |
8658dca8 | 291 | static const char *const rqf_name[] = { |
1a435111 | 292 | RQF_NAME(SORTED), |
85ba3eff | 293 | RQF_NAME(STARTED), |
1a435111 OS |
294 | RQF_NAME(SOFTBARRIER), |
295 | RQF_NAME(FLUSH_SEQ), | |
296 | RQF_NAME(MIXED_MERGE), | |
297 | RQF_NAME(MQ_INFLIGHT), | |
298 | RQF_NAME(DONTPREP), | |
299 | RQF_NAME(PREEMPT), | |
1a435111 OS |
300 | RQF_NAME(FAILED), |
301 | RQF_NAME(QUIET), | |
302 | RQF_NAME(ELVPRIV), | |
303 | RQF_NAME(IO_STAT), | |
304 | RQF_NAME(ALLOCED), | |
305 | RQF_NAME(PM), | |
306 | RQF_NAME(HASHED), | |
307 | RQF_NAME(STATS), | |
308 | RQF_NAME(SPECIAL_PAYLOAD), | |
5d75d3f2 | 309 | RQF_NAME(ZONE_WRITE_LOCKED), |
76a86f9d | 310 | RQF_NAME(MQ_POLL_SLEPT), |
8658dca8 | 311 | }; |
1a435111 | 312 | #undef RQF_NAME |
8658dca8 | 313 | |
ec6dcf63 BVA |
314 | static const char *const blk_mq_rq_state_name_array[] = { |
315 | [MQ_RQ_IDLE] = "idle", | |
316 | [MQ_RQ_IN_FLIGHT] = "in_flight", | |
317 | [MQ_RQ_COMPLETE] = "complete", | |
318 | }; | |
319 | ||
320 | static const char *blk_mq_rq_state_name(enum mq_rq_state rq_state) | |
321 | { | |
a1e79188 | 322 | if (WARN_ON_ONCE((unsigned int)rq_state >= |
ec6dcf63 BVA |
323 | ARRAY_SIZE(blk_mq_rq_state_name_array))) |
324 | return "(?)"; | |
325 | return blk_mq_rq_state_name_array[rq_state]; | |
326 | } | |
327 | ||
daaadb3e | 328 | int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq) |
950cd7e9 | 329 | { |
2836ee4b | 330 | const struct blk_mq_ops *const mq_ops = rq->q->mq_ops; |
f9bc64a0 | 331 | const unsigned int op = req_op(rq); |
874c893b | 332 | const char *op_str = blk_op_str(op); |
950cd7e9 | 333 | |
8658dca8 | 334 | seq_printf(m, "%p {.op=", rq); |
874c893b | 335 | if (strcmp(op_str, "UNKNOWN") == 0) |
3f6d385f | 336 | seq_printf(m, "%u", op); |
8658dca8 | 337 | else |
874c893b | 338 | seq_printf(m, "%s", op_str); |
8658dca8 BVA |
339 | seq_puts(m, ", .cmd_flags="); |
340 | blk_flags_show(m, rq->cmd_flags & ~REQ_OP_MASK, cmd_flag_name, | |
341 | ARRAY_SIZE(cmd_flag_name)); | |
342 | seq_puts(m, ", .rq_flags="); | |
343 | blk_flags_show(m, (__force unsigned int)rq->rq_flags, rqf_name, | |
344 | ARRAY_SIZE(rqf_name)); | |
ec6dcf63 | 345 | seq_printf(m, ", .state=%s", blk_mq_rq_state_name(blk_mq_rq_state(rq))); |
2836ee4b | 346 | seq_printf(m, ", .tag=%d, .internal_tag=%d", rq->tag, |
8658dca8 | 347 | rq->internal_tag); |
2836ee4b BVA |
348 | if (mq_ops->show_rq) |
349 | mq_ops->show_rq(m, rq); | |
350 | seq_puts(m, "}\n"); | |
950cd7e9 OS |
351 | return 0; |
352 | } | |
daaadb3e OS |
353 | EXPORT_SYMBOL_GPL(__blk_mq_debugfs_rq_show); |
354 | ||
355 | int blk_mq_debugfs_rq_show(struct seq_file *m, void *v) | |
356 | { | |
357 | return __blk_mq_debugfs_rq_show(m, list_entry_rq(v)); | |
358 | } | |
16b738f6 | 359 | EXPORT_SYMBOL_GPL(blk_mq_debugfs_rq_show); |
950cd7e9 OS |
360 | |
361 | static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos) | |
f3bcb0e6 | 362 | __acquires(&hctx->lock) |
950cd7e9 OS |
363 | { |
364 | struct blk_mq_hw_ctx *hctx = m->private; | |
365 | ||
366 | spin_lock(&hctx->lock); | |
367 | return seq_list_start(&hctx->dispatch, *pos); | |
368 | } | |
369 | ||
370 | static void *hctx_dispatch_next(struct seq_file *m, void *v, loff_t *pos) | |
371 | { | |
372 | struct blk_mq_hw_ctx *hctx = m->private; | |
373 | ||
374 | return seq_list_next(v, &hctx->dispatch, pos); | |
375 | } | |
376 | ||
377 | static void hctx_dispatch_stop(struct seq_file *m, void *v) | |
f3bcb0e6 | 378 | __releases(&hctx->lock) |
950cd7e9 OS |
379 | { |
380 | struct blk_mq_hw_ctx *hctx = m->private; | |
381 | ||
382 | spin_unlock(&hctx->lock); | |
383 | } | |
384 | ||
385 | static const struct seq_operations hctx_dispatch_seq_ops = { | |
386 | .start = hctx_dispatch_start, | |
387 | .next = hctx_dispatch_next, | |
388 | .stop = hctx_dispatch_stop, | |
389 | .show = blk_mq_debugfs_rq_show, | |
390 | }; | |
391 | ||
2720bab5 BVA |
392 | struct show_busy_params { |
393 | struct seq_file *m; | |
394 | struct blk_mq_hw_ctx *hctx; | |
395 | }; | |
396 | ||
397 | /* | |
398 | * Note: the state of a request may change while this function is in progress, | |
7baa8572 JA |
399 | * e.g. due to a concurrent blk_mq_finish_request() call. Returns true to |
400 | * keep iterating requests. | |
2720bab5 | 401 | */ |
7baa8572 | 402 | static bool hctx_show_busy_rq(struct request *rq, void *data, bool reserved) |
2720bab5 BVA |
403 | { |
404 | const struct show_busy_params *params = data; | |
405 | ||
ea4f995e | 406 | if (rq->mq_hctx == params->hctx) |
b5fc1e8b | 407 | __blk_mq_debugfs_rq_show(params->m, rq); |
7baa8572 JA |
408 | |
409 | return true; | |
2720bab5 BVA |
410 | } |
411 | ||
412 | static int hctx_busy_show(void *data, struct seq_file *m) | |
413 | { | |
414 | struct blk_mq_hw_ctx *hctx = data; | |
415 | struct show_busy_params params = { .m = m, .hctx = hctx }; | |
416 | ||
417 | blk_mq_tagset_busy_iter(hctx->queue->tag_set, hctx_show_busy_rq, | |
418 | ¶ms); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
346fc108 ML |
423 | static const char *const hctx_types[] = { |
424 | [HCTX_TYPE_DEFAULT] = "default", | |
425 | [HCTX_TYPE_READ] = "read", | |
426 | [HCTX_TYPE_POLL] = "poll", | |
427 | }; | |
428 | ||
429 | static int hctx_type_show(void *data, struct seq_file *m) | |
430 | { | |
431 | struct blk_mq_hw_ctx *hctx = data; | |
432 | ||
433 | BUILD_BUG_ON(ARRAY_SIZE(hctx_types) != HCTX_MAX_TYPES); | |
434 | seq_printf(m, "%s\n", hctx_types[hctx->type]); | |
435 | return 0; | |
436 | } | |
437 | ||
f57de23a | 438 | static int hctx_ctx_map_show(void *data, struct seq_file *m) |
0bfa5288 | 439 | { |
f57de23a | 440 | struct blk_mq_hw_ctx *hctx = data; |
0bfa5288 OS |
441 | |
442 | sbitmap_bitmap_show(&hctx->ctx_map, m); | |
443 | return 0; | |
444 | } | |
445 | ||
d96b37c0 OS |
446 | static void blk_mq_debugfs_tags_show(struct seq_file *m, |
447 | struct blk_mq_tags *tags) | |
448 | { | |
449 | seq_printf(m, "nr_tags=%u\n", tags->nr_tags); | |
450 | seq_printf(m, "nr_reserved_tags=%u\n", tags->nr_reserved_tags); | |
451 | seq_printf(m, "active_queues=%d\n", | |
452 | atomic_read(&tags->active_queues)); | |
453 | ||
454 | seq_puts(m, "\nbitmap_tags:\n"); | |
455 | sbitmap_queue_show(&tags->bitmap_tags, m); | |
456 | ||
457 | if (tags->nr_reserved_tags) { | |
458 | seq_puts(m, "\nbreserved_tags:\n"); | |
459 | sbitmap_queue_show(&tags->breserved_tags, m); | |
460 | } | |
461 | } | |
462 | ||
f57de23a | 463 | static int hctx_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 464 | { |
f57de23a | 465 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 466 | struct request_queue *q = hctx->queue; |
8c0f14ea | 467 | int res; |
d96b37c0 | 468 | |
8c0f14ea BVA |
469 | res = mutex_lock_interruptible(&q->sysfs_lock); |
470 | if (res) | |
471 | goto out; | |
d96b37c0 OS |
472 | if (hctx->tags) |
473 | blk_mq_debugfs_tags_show(m, hctx->tags); | |
474 | mutex_unlock(&q->sysfs_lock); | |
475 | ||
8c0f14ea BVA |
476 | out: |
477 | return res; | |
d96b37c0 OS |
478 | } |
479 | ||
f57de23a | 480 | static int hctx_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 481 | { |
f57de23a | 482 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 483 | struct request_queue *q = hctx->queue; |
8c0f14ea | 484 | int res; |
d7e3621a | 485 | |
8c0f14ea BVA |
486 | res = mutex_lock_interruptible(&q->sysfs_lock); |
487 | if (res) | |
488 | goto out; | |
d7e3621a OS |
489 | if (hctx->tags) |
490 | sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); | |
491 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
492 | |
493 | out: | |
494 | return res; | |
d7e3621a OS |
495 | } |
496 | ||
f57de23a | 497 | static int hctx_sched_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 498 | { |
f57de23a | 499 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 500 | struct request_queue *q = hctx->queue; |
8c0f14ea | 501 | int res; |
d96b37c0 | 502 | |
8c0f14ea BVA |
503 | res = mutex_lock_interruptible(&q->sysfs_lock); |
504 | if (res) | |
505 | goto out; | |
d96b37c0 OS |
506 | if (hctx->sched_tags) |
507 | blk_mq_debugfs_tags_show(m, hctx->sched_tags); | |
508 | mutex_unlock(&q->sysfs_lock); | |
509 | ||
8c0f14ea BVA |
510 | out: |
511 | return res; | |
d96b37c0 OS |
512 | } |
513 | ||
f57de23a | 514 | static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 515 | { |
f57de23a | 516 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 517 | struct request_queue *q = hctx->queue; |
8c0f14ea | 518 | int res; |
d7e3621a | 519 | |
8c0f14ea BVA |
520 | res = mutex_lock_interruptible(&q->sysfs_lock); |
521 | if (res) | |
522 | goto out; | |
d7e3621a OS |
523 | if (hctx->sched_tags) |
524 | sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); | |
525 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
526 | |
527 | out: | |
528 | return res; | |
d7e3621a OS |
529 | } |
530 | ||
f57de23a | 531 | static int hctx_io_poll_show(void *data, struct seq_file *m) |
be215473 | 532 | { |
f57de23a | 533 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
534 | |
535 | seq_printf(m, "considered=%lu\n", hctx->poll_considered); | |
536 | seq_printf(m, "invoked=%lu\n", hctx->poll_invoked); | |
537 | seq_printf(m, "success=%lu\n", hctx->poll_success); | |
538 | return 0; | |
539 | } | |
540 | ||
f57de23a | 541 | static ssize_t hctx_io_poll_write(void *data, const char __user *buf, |
be215473 OS |
542 | size_t count, loff_t *ppos) |
543 | { | |
f57de23a | 544 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
545 | |
546 | hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0; | |
547 | return count; | |
548 | } | |
549 | ||
f57de23a | 550 | static int hctx_dispatched_show(void *data, struct seq_file *m) |
be215473 | 551 | { |
f57de23a | 552 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
553 | int i; |
554 | ||
555 | seq_printf(m, "%8u\t%lu\n", 0U, hctx->dispatched[0]); | |
556 | ||
557 | for (i = 1; i < BLK_MQ_MAX_DISPATCH_ORDER - 1; i++) { | |
558 | unsigned int d = 1U << (i - 1); | |
559 | ||
560 | seq_printf(m, "%8u\t%lu\n", d, hctx->dispatched[i]); | |
561 | } | |
562 | ||
563 | seq_printf(m, "%8u+\t%lu\n", 1U << (i - 1), hctx->dispatched[i]); | |
564 | return 0; | |
565 | } | |
566 | ||
f57de23a | 567 | static ssize_t hctx_dispatched_write(void *data, const char __user *buf, |
be215473 OS |
568 | size_t count, loff_t *ppos) |
569 | { | |
f57de23a | 570 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
571 | int i; |
572 | ||
573 | for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) | |
574 | hctx->dispatched[i] = 0; | |
575 | return count; | |
576 | } | |
577 | ||
f57de23a | 578 | static int hctx_queued_show(void *data, struct seq_file *m) |
4a46f05e | 579 | { |
f57de23a | 580 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
581 | |
582 | seq_printf(m, "%lu\n", hctx->queued); | |
583 | return 0; | |
584 | } | |
585 | ||
f57de23a | 586 | static ssize_t hctx_queued_write(void *data, const char __user *buf, |
4a46f05e OS |
587 | size_t count, loff_t *ppos) |
588 | { | |
f57de23a | 589 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
590 | |
591 | hctx->queued = 0; | |
592 | return count; | |
593 | } | |
594 | ||
f57de23a | 595 | static int hctx_run_show(void *data, struct seq_file *m) |
4a46f05e | 596 | { |
f57de23a | 597 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
598 | |
599 | seq_printf(m, "%lu\n", hctx->run); | |
600 | return 0; | |
601 | } | |
602 | ||
f57de23a OS |
603 | static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count, |
604 | loff_t *ppos) | |
4a46f05e | 605 | { |
f57de23a | 606 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
607 | |
608 | hctx->run = 0; | |
609 | return count; | |
610 | } | |
611 | ||
f57de23a | 612 | static int hctx_active_show(void *data, struct seq_file *m) |
4a46f05e | 613 | { |
f57de23a | 614 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
615 | |
616 | seq_printf(m, "%d\n", atomic_read(&hctx->nr_active)); | |
617 | return 0; | |
618 | } | |
619 | ||
6e768717 ML |
620 | static int hctx_dispatch_busy_show(void *data, struct seq_file *m) |
621 | { | |
622 | struct blk_mq_hw_ctx *hctx = data; | |
623 | ||
624 | seq_printf(m, "%u\n", hctx->dispatch_busy); | |
625 | return 0; | |
626 | } | |
627 | ||
c16d6b5a ML |
628 | #define CTX_RQ_SEQ_OPS(name, type) \ |
629 | static void *ctx_##name##_rq_list_start(struct seq_file *m, loff_t *pos) \ | |
630 | __acquires(&ctx->lock) \ | |
631 | { \ | |
632 | struct blk_mq_ctx *ctx = m->private; \ | |
633 | \ | |
634 | spin_lock(&ctx->lock); \ | |
635 | return seq_list_start(&ctx->rq_lists[type], *pos); \ | |
636 | } \ | |
637 | \ | |
638 | static void *ctx_##name##_rq_list_next(struct seq_file *m, void *v, \ | |
639 | loff_t *pos) \ | |
640 | { \ | |
641 | struct blk_mq_ctx *ctx = m->private; \ | |
642 | \ | |
643 | return seq_list_next(v, &ctx->rq_lists[type], pos); \ | |
644 | } \ | |
645 | \ | |
646 | static void ctx_##name##_rq_list_stop(struct seq_file *m, void *v) \ | |
647 | __releases(&ctx->lock) \ | |
648 | { \ | |
649 | struct blk_mq_ctx *ctx = m->private; \ | |
650 | \ | |
651 | spin_unlock(&ctx->lock); \ | |
652 | } \ | |
653 | \ | |
654 | static const struct seq_operations ctx_##name##_rq_list_seq_ops = { \ | |
655 | .start = ctx_##name##_rq_list_start, \ | |
656 | .next = ctx_##name##_rq_list_next, \ | |
657 | .stop = ctx_##name##_rq_list_stop, \ | |
658 | .show = blk_mq_debugfs_rq_show, \ | |
659 | } | |
660 | ||
661 | CTX_RQ_SEQ_OPS(default, HCTX_TYPE_DEFAULT); | |
662 | CTX_RQ_SEQ_OPS(read, HCTX_TYPE_READ); | |
663 | CTX_RQ_SEQ_OPS(poll, HCTX_TYPE_POLL); | |
950cd7e9 | 664 | |
f57de23a | 665 | static int ctx_dispatched_show(void *data, struct seq_file *m) |
4a46f05e | 666 | { |
f57de23a | 667 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
668 | |
669 | seq_printf(m, "%lu %lu\n", ctx->rq_dispatched[1], ctx->rq_dispatched[0]); | |
670 | return 0; | |
671 | } | |
672 | ||
f57de23a | 673 | static ssize_t ctx_dispatched_write(void *data, const char __user *buf, |
4a46f05e OS |
674 | size_t count, loff_t *ppos) |
675 | { | |
f57de23a | 676 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
677 | |
678 | ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0; | |
679 | return count; | |
680 | } | |
681 | ||
f57de23a | 682 | static int ctx_merged_show(void *data, struct seq_file *m) |
4a46f05e | 683 | { |
f57de23a | 684 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
685 | |
686 | seq_printf(m, "%lu\n", ctx->rq_merged); | |
687 | return 0; | |
688 | } | |
689 | ||
f57de23a OS |
690 | static ssize_t ctx_merged_write(void *data, const char __user *buf, |
691 | size_t count, loff_t *ppos) | |
4a46f05e | 692 | { |
f57de23a | 693 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
694 | |
695 | ctx->rq_merged = 0; | |
696 | return count; | |
697 | } | |
698 | ||
f57de23a | 699 | static int ctx_completed_show(void *data, struct seq_file *m) |
4a46f05e | 700 | { |
f57de23a | 701 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
702 | |
703 | seq_printf(m, "%lu %lu\n", ctx->rq_completed[1], ctx->rq_completed[0]); | |
704 | return 0; | |
705 | } | |
706 | ||
f57de23a OS |
707 | static ssize_t ctx_completed_write(void *data, const char __user *buf, |
708 | size_t count, loff_t *ppos) | |
4a46f05e | 709 | { |
f57de23a OS |
710 | struct blk_mq_ctx *ctx = data; |
711 | ||
712 | ctx->rq_completed[0] = ctx->rq_completed[1] = 0; | |
713 | return count; | |
4a46f05e OS |
714 | } |
715 | ||
f57de23a OS |
716 | static int blk_mq_debugfs_show(struct seq_file *m, void *v) |
717 | { | |
718 | const struct blk_mq_debugfs_attr *attr = m->private; | |
719 | void *data = d_inode(m->file->f_path.dentry->d_parent)->i_private; | |
720 | ||
721 | return attr->show(data, m); | |
722 | } | |
723 | ||
724 | static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf, | |
725 | size_t count, loff_t *ppos) | |
4a46f05e OS |
726 | { |
727 | struct seq_file *m = file->private_data; | |
f57de23a OS |
728 | const struct blk_mq_debugfs_attr *attr = m->private; |
729 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
4a46f05e | 730 | |
6b136a24 EG |
731 | /* |
732 | * Attributes that only implement .seq_ops are read-only and 'attr' is | |
733 | * the same with 'data' in this case. | |
734 | */ | |
735 | if (attr == data || !attr->write) | |
f57de23a OS |
736 | return -EPERM; |
737 | ||
738 | return attr->write(data, buf, count, ppos); | |
739 | } | |
740 | ||
741 | static int blk_mq_debugfs_open(struct inode *inode, struct file *file) | |
742 | { | |
743 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
744 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
745 | struct seq_file *m; | |
746 | int ret; | |
747 | ||
748 | if (attr->seq_ops) { | |
749 | ret = seq_open(file, attr->seq_ops); | |
750 | if (!ret) { | |
751 | m = file->private_data; | |
752 | m->private = data; | |
753 | } | |
754 | return ret; | |
755 | } | |
756 | ||
757 | if (WARN_ON_ONCE(!attr->show)) | |
758 | return -EPERM; | |
759 | ||
760 | return single_open(file, blk_mq_debugfs_show, inode->i_private); | |
4a46f05e OS |
761 | } |
762 | ||
f57de23a OS |
763 | static int blk_mq_debugfs_release(struct inode *inode, struct file *file) |
764 | { | |
765 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
766 | ||
767 | if (attr->show) | |
768 | return single_release(inode, file); | |
ee1e0359 CK |
769 | |
770 | return seq_release(inode, file); | |
f57de23a OS |
771 | } |
772 | ||
f8465933 | 773 | static const struct file_operations blk_mq_debugfs_fops = { |
f57de23a | 774 | .open = blk_mq_debugfs_open, |
4a46f05e | 775 | .read = seq_read, |
f57de23a | 776 | .write = blk_mq_debugfs_write, |
4a46f05e | 777 | .llseek = seq_lseek, |
f57de23a | 778 | .release = blk_mq_debugfs_release, |
4a46f05e OS |
779 | }; |
780 | ||
07e4fead | 781 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { |
f57de23a OS |
782 | {"state", 0400, hctx_state_show}, |
783 | {"flags", 0400, hctx_flags_show}, | |
784 | {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops}, | |
2720bab5 | 785 | {"busy", 0400, hctx_busy_show}, |
f57de23a OS |
786 | {"ctx_map", 0400, hctx_ctx_map_show}, |
787 | {"tags", 0400, hctx_tags_show}, | |
788 | {"tags_bitmap", 0400, hctx_tags_bitmap_show}, | |
789 | {"sched_tags", 0400, hctx_sched_tags_show}, | |
790 | {"sched_tags_bitmap", 0400, hctx_sched_tags_bitmap_show}, | |
791 | {"io_poll", 0600, hctx_io_poll_show, hctx_io_poll_write}, | |
792 | {"dispatched", 0600, hctx_dispatched_show, hctx_dispatched_write}, | |
793 | {"queued", 0600, hctx_queued_show, hctx_queued_write}, | |
794 | {"run", 0600, hctx_run_show, hctx_run_write}, | |
795 | {"active", 0400, hctx_active_show}, | |
6e768717 | 796 | {"dispatch_busy", 0400, hctx_dispatch_busy_show}, |
346fc108 | 797 | {"type", 0400, hctx_type_show}, |
72f2f8f6 | 798 | {}, |
07e4fead OS |
799 | }; |
800 | ||
801 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { | |
c16d6b5a ML |
802 | {"default_rq_list", 0400, .seq_ops = &ctx_default_rq_list_seq_ops}, |
803 | {"read_rq_list", 0400, .seq_ops = &ctx_read_rq_list_seq_ops}, | |
804 | {"poll_rq_list", 0400, .seq_ops = &ctx_poll_rq_list_seq_ops}, | |
f57de23a OS |
805 | {"dispatched", 0600, ctx_dispatched_show, ctx_dispatched_write}, |
806 | {"merged", 0600, ctx_merged_show, ctx_merged_write}, | |
807 | {"completed", 0600, ctx_completed_show, ctx_completed_write}, | |
72f2f8f6 | 808 | {}, |
07e4fead OS |
809 | }; |
810 | ||
6cfc0081 | 811 | static void debugfs_create_files(struct dentry *parent, void *data, |
9c1051aa OS |
812 | const struct blk_mq_debugfs_attr *attr) |
813 | { | |
36991ca6 | 814 | if (IS_ERR_OR_NULL(parent)) |
6cfc0081 | 815 | return; |
36991ca6 | 816 | |
9c1051aa OS |
817 | d_inode(parent)->i_private = data; |
818 | ||
6cfc0081 GKH |
819 | for (; attr->name; attr++) |
820 | debugfs_create_file(attr->name, attr->mode, parent, | |
821 | (void *)attr, &blk_mq_debugfs_fops); | |
9c1051aa OS |
822 | } |
823 | ||
6cfc0081 | 824 | void blk_mq_debugfs_register(struct request_queue *q) |
07e4fead | 825 | { |
9c1051aa OS |
826 | struct blk_mq_hw_ctx *hctx; |
827 | int i; | |
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 | { | |
d332ce09 | 859 | q->sched_debugfs_dir = NULL; |
07e4fead OS |
860 | } |
861 | ||
6cfc0081 GKH |
862 | static void blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx, |
863 | struct blk_mq_ctx *ctx) | |
07e4fead OS |
864 | { |
865 | struct dentry *ctx_dir; | |
866 | char name[20]; | |
07e4fead OS |
867 | |
868 | snprintf(name, sizeof(name), "cpu%u", ctx->cpu); | |
9c1051aa | 869 | ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir); |
07e4fead | 870 | |
6cfc0081 | 871 | debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs); |
07e4fead OS |
872 | } |
873 | ||
6cfc0081 GKH |
874 | void blk_mq_debugfs_register_hctx(struct request_queue *q, |
875 | struct blk_mq_hw_ctx *hctx) | |
07e4fead OS |
876 | { |
877 | struct blk_mq_ctx *ctx; | |
07e4fead OS |
878 | char name[20]; |
879 | int i; | |
880 | ||
88aabbd7 | 881 | snprintf(name, sizeof(name), "hctx%u", hctx->queue_num); |
9c1051aa | 882 | hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir); |
07e4fead | 883 | |
6cfc0081 | 884 | debugfs_create_files(hctx->debugfs_dir, hctx, blk_mq_debugfs_hctx_attrs); |
9c1051aa | 885 | |
6cfc0081 GKH |
886 | hctx_for_each_ctx(hctx, ctx, i) |
887 | blk_mq_debugfs_register_ctx(hctx, ctx); | |
9c1051aa OS |
888 | } |
889 | ||
890 | void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx) | |
891 | { | |
892 | debugfs_remove_recursive(hctx->debugfs_dir); | |
d332ce09 | 893 | hctx->sched_debugfs_dir = NULL; |
9c1051aa | 894 | hctx->debugfs_dir = NULL; |
07e4fead OS |
895 | } |
896 | ||
6cfc0081 | 897 | void blk_mq_debugfs_register_hctxs(struct request_queue *q) |
07e4fead OS |
898 | { |
899 | struct blk_mq_hw_ctx *hctx; | |
900 | int i; | |
901 | ||
6cfc0081 GKH |
902 | queue_for_each_hw_ctx(q, hctx, i) |
903 | blk_mq_debugfs_register_hctx(q, hctx); | |
07e4fead OS |
904 | } |
905 | ||
9c1051aa | 906 | void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) |
07e4fead | 907 | { |
9c1051aa OS |
908 | struct blk_mq_hw_ctx *hctx; |
909 | int i; | |
910 | ||
911 | queue_for_each_hw_ctx(q, hctx, i) | |
912 | blk_mq_debugfs_unregister_hctx(hctx); | |
07e4fead | 913 | } |
d332ce09 | 914 | |
6cfc0081 | 915 | void blk_mq_debugfs_register_sched(struct request_queue *q) |
d332ce09 OS |
916 | { |
917 | struct elevator_type *e = q->elevator->type; | |
918 | ||
7e41c3c9 GKH |
919 | /* |
920 | * If the parent directory has not been created yet, return, we will be | |
921 | * called again later on and the directory/files will be created then. | |
922 | */ | |
923 | if (!q->debugfs_dir) | |
924 | return; | |
925 | ||
d332ce09 | 926 | if (!e->queue_debugfs_attrs) |
6cfc0081 | 927 | return; |
d332ce09 OS |
928 | |
929 | q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir); | |
d332ce09 | 930 | |
6cfc0081 | 931 | debugfs_create_files(q->sched_debugfs_dir, q, e->queue_debugfs_attrs); |
d332ce09 OS |
932 | } |
933 | ||
934 | void blk_mq_debugfs_unregister_sched(struct request_queue *q) | |
935 | { | |
936 | debugfs_remove_recursive(q->sched_debugfs_dir); | |
937 | q->sched_debugfs_dir = NULL; | |
938 | } | |
939 | ||
cc56694f ML |
940 | void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos) |
941 | { | |
942 | debugfs_remove_recursive(rqos->debugfs_dir); | |
943 | rqos->debugfs_dir = NULL; | |
944 | } | |
945 | ||
6cfc0081 | 946 | void blk_mq_debugfs_register_rqos(struct rq_qos *rqos) |
cc56694f ML |
947 | { |
948 | struct request_queue *q = rqos->q; | |
949 | const char *dir_name = rq_qos_id_to_name(rqos->id); | |
950 | ||
cc56694f | 951 | if (rqos->debugfs_dir || !rqos->ops->debugfs_attrs) |
6cfc0081 | 952 | return; |
cc56694f | 953 | |
6cfc0081 | 954 | if (!q->rqos_debugfs_dir) |
cc56694f ML |
955 | q->rqos_debugfs_dir = debugfs_create_dir("rqos", |
956 | q->debugfs_dir); | |
cc56694f ML |
957 | |
958 | rqos->debugfs_dir = debugfs_create_dir(dir_name, | |
959 | rqos->q->rqos_debugfs_dir); | |
cc56694f | 960 | |
6cfc0081 | 961 | debugfs_create_files(rqos->debugfs_dir, rqos, rqos->ops->debugfs_attrs); |
cc56694f ML |
962 | } |
963 | ||
964 | void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q) | |
965 | { | |
966 | debugfs_remove_recursive(q->rqos_debugfs_dir); | |
967 | q->rqos_debugfs_dir = NULL; | |
968 | } | |
969 | ||
6cfc0081 GKH |
970 | void blk_mq_debugfs_register_sched_hctx(struct request_queue *q, |
971 | struct blk_mq_hw_ctx *hctx) | |
d332ce09 OS |
972 | { |
973 | struct elevator_type *e = q->elevator->type; | |
974 | ||
d332ce09 | 975 | if (!e->hctx_debugfs_attrs) |
6cfc0081 | 976 | return; |
d332ce09 OS |
977 | |
978 | hctx->sched_debugfs_dir = debugfs_create_dir("sched", | |
979 | hctx->debugfs_dir); | |
6cfc0081 GKH |
980 | debugfs_create_files(hctx->sched_debugfs_dir, hctx, |
981 | e->hctx_debugfs_attrs); | |
d332ce09 OS |
982 | } |
983 | ||
984 | void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx) | |
985 | { | |
986 | debugfs_remove_recursive(hctx->sched_debugfs_dir); | |
987 | hctx->sched_debugfs_dir = NULL; | |
988 | } |