Commit | Line | Data |
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07e4fead OS |
1 | /* |
2 | * Copyright (C) 2017 Facebook | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/blkdev.h> | |
19 | #include <linux/debugfs.h> | |
20 | ||
21 | #include <linux/blk-mq.h> | |
18fbda91 | 22 | #include "blk.h" |
07e4fead | 23 | #include "blk-mq.h" |
d173a251 | 24 | #include "blk-mq-debugfs.h" |
d96b37c0 | 25 | #include "blk-mq-tag.h" |
cc56694f | 26 | #include "blk-rq-qos.h" |
07e4fead | 27 | |
1209cb7f BVA |
28 | static void print_stat(struct seq_file *m, struct blk_rq_stat *stat) |
29 | { | |
30 | if (stat->nr_samples) { | |
31 | seq_printf(m, "samples=%d, mean=%lld, min=%llu, max=%llu", | |
32 | stat->nr_samples, stat->mean, stat->min, stat->max); | |
33 | } else { | |
34 | seq_puts(m, "samples=0"); | |
35 | } | |
36 | } | |
37 | ||
38 | static int queue_poll_stat_show(void *data, struct seq_file *m) | |
39 | { | |
40 | struct request_queue *q = data; | |
41 | int bucket; | |
42 | ||
43 | for (bucket = 0; bucket < BLK_MQ_POLL_STATS_BKTS/2; bucket++) { | |
44 | seq_printf(m, "read (%d Bytes): ", 1 << (9+bucket)); | |
45 | print_stat(m, &q->poll_stat[2*bucket]); | |
46 | seq_puts(m, "\n"); | |
47 | ||
48 | seq_printf(m, "write (%d Bytes): ", 1 << (9+bucket)); | |
49 | print_stat(m, &q->poll_stat[2*bucket+1]); | |
50 | seq_puts(m, "\n"); | |
51 | } | |
52 | return 0; | |
53 | } | |
54 | ||
55 | static void *queue_requeue_list_start(struct seq_file *m, loff_t *pos) | |
56 | __acquires(&q->requeue_lock) | |
57 | { | |
58 | struct request_queue *q = m->private; | |
59 | ||
60 | spin_lock_irq(&q->requeue_lock); | |
61 | return seq_list_start(&q->requeue_list, *pos); | |
62 | } | |
63 | ||
64 | static void *queue_requeue_list_next(struct seq_file *m, void *v, loff_t *pos) | |
65 | { | |
66 | struct request_queue *q = m->private; | |
67 | ||
68 | return seq_list_next(v, &q->requeue_list, pos); | |
69 | } | |
70 | ||
71 | static void queue_requeue_list_stop(struct seq_file *m, void *v) | |
72 | __releases(&q->requeue_lock) | |
73 | { | |
74 | struct request_queue *q = m->private; | |
75 | ||
76 | spin_unlock_irq(&q->requeue_lock); | |
77 | } | |
78 | ||
79 | static const struct seq_operations queue_requeue_list_seq_ops = { | |
80 | .start = queue_requeue_list_start, | |
81 | .next = queue_requeue_list_next, | |
82 | .stop = queue_requeue_list_stop, | |
83 | .show = blk_mq_debugfs_rq_show, | |
84 | }; | |
85 | ||
91d68905 BVA |
86 | static int blk_flags_show(struct seq_file *m, const unsigned long flags, |
87 | const char *const *flag_name, int flag_name_count) | |
88 | { | |
89 | bool sep = false; | |
90 | int i; | |
91 | ||
92 | for (i = 0; i < sizeof(flags) * BITS_PER_BYTE; i++) { | |
93 | if (!(flags & BIT(i))) | |
94 | continue; | |
95 | if (sep) | |
bec03d6b | 96 | seq_puts(m, "|"); |
91d68905 BVA |
97 | sep = true; |
98 | if (i < flag_name_count && flag_name[i]) | |
99 | seq_puts(m, flag_name[i]); | |
100 | else | |
101 | seq_printf(m, "%d", i); | |
102 | } | |
91d68905 BVA |
103 | return 0; |
104 | } | |
105 | ||
cd84a62e BVA |
106 | static int queue_pm_only_show(void *data, struct seq_file *m) |
107 | { | |
108 | struct request_queue *q = data; | |
109 | ||
110 | seq_printf(m, "%d\n", atomic_read(&q->pm_only)); | |
111 | return 0; | |
112 | } | |
113 | ||
1a435111 | 114 | #define QUEUE_FLAG_NAME(name) [QUEUE_FLAG_##name] = #name |
91d68905 | 115 | static const char *const blk_queue_flag_name[] = { |
1a435111 | 116 | QUEUE_FLAG_NAME(STOPPED), |
1a435111 | 117 | QUEUE_FLAG_NAME(DYING), |
1a435111 OS |
118 | QUEUE_FLAG_NAME(NOMERGES), |
119 | QUEUE_FLAG_NAME(SAME_COMP), | |
120 | QUEUE_FLAG_NAME(FAIL_IO), | |
1a435111 OS |
121 | QUEUE_FLAG_NAME(NONROT), |
122 | QUEUE_FLAG_NAME(IO_STAT), | |
123 | QUEUE_FLAG_NAME(DISCARD), | |
124 | QUEUE_FLAG_NAME(NOXMERGES), | |
125 | QUEUE_FLAG_NAME(ADD_RANDOM), | |
126 | QUEUE_FLAG_NAME(SECERASE), | |
127 | QUEUE_FLAG_NAME(SAME_FORCE), | |
128 | QUEUE_FLAG_NAME(DEAD), | |
129 | QUEUE_FLAG_NAME(INIT_DONE), | |
1a435111 OS |
130 | QUEUE_FLAG_NAME(POLL), |
131 | QUEUE_FLAG_NAME(WC), | |
132 | QUEUE_FLAG_NAME(FUA), | |
1a435111 OS |
133 | QUEUE_FLAG_NAME(DAX), |
134 | QUEUE_FLAG_NAME(STATS), | |
135 | QUEUE_FLAG_NAME(POLL_STATS), | |
136 | QUEUE_FLAG_NAME(REGISTERED), | |
22d53821 BVA |
137 | QUEUE_FLAG_NAME(SCSI_PASSTHROUGH), |
138 | QUEUE_FLAG_NAME(QUIESCED), | |
91d68905 | 139 | }; |
1a435111 | 140 | #undef QUEUE_FLAG_NAME |
91d68905 | 141 | |
f57de23a | 142 | static int queue_state_show(void *data, struct seq_file *m) |
91d68905 | 143 | { |
f57de23a | 144 | struct request_queue *q = data; |
91d68905 BVA |
145 | |
146 | blk_flags_show(m, q->queue_flags, blk_queue_flag_name, | |
147 | ARRAY_SIZE(blk_queue_flag_name)); | |
fd07dc81 | 148 | seq_puts(m, "\n"); |
91d68905 BVA |
149 | return 0; |
150 | } | |
151 | ||
f57de23a OS |
152 | static ssize_t queue_state_write(void *data, const char __user *buf, |
153 | size_t count, loff_t *ppos) | |
91d68905 | 154 | { |
f57de23a | 155 | struct request_queue *q = data; |
71b90511 | 156 | char opbuf[16] = { }, *op; |
91d68905 | 157 | |
18d4d7d0 BVA |
158 | /* |
159 | * The "state" attribute is removed after blk_cleanup_queue() has called | |
160 | * blk_mq_free_queue(). Return if QUEUE_FLAG_DEAD has been set to avoid | |
161 | * triggering a use-after-free. | |
162 | */ | |
163 | if (blk_queue_dead(q)) | |
164 | return -ENOENT; | |
165 | ||
71b90511 | 166 | if (count >= sizeof(opbuf)) { |
c7e4145a OS |
167 | pr_err("%s: operation too long\n", __func__); |
168 | goto inval; | |
169 | } | |
170 | ||
71b90511 | 171 | if (copy_from_user(opbuf, buf, count)) |
91d68905 | 172 | return -EFAULT; |
71b90511 | 173 | op = strstrip(opbuf); |
91d68905 BVA |
174 | if (strcmp(op, "run") == 0) { |
175 | blk_mq_run_hw_queues(q, true); | |
176 | } else if (strcmp(op, "start") == 0) { | |
177 | blk_mq_start_stopped_hw_queues(q, true); | |
edea55ab BVA |
178 | } else if (strcmp(op, "kick") == 0) { |
179 | blk_mq_kick_requeue_list(q); | |
91d68905 | 180 | } else { |
c7e4145a OS |
181 | pr_err("%s: unsupported operation '%s'\n", __func__, op); |
182 | inval: | |
edea55ab | 183 | pr_err("%s: use 'run', 'start' or 'kick'\n", __func__); |
91d68905 BVA |
184 | return -EINVAL; |
185 | } | |
c7e4145a | 186 | return count; |
91d68905 BVA |
187 | } |
188 | ||
f793dfd3 JA |
189 | static int queue_write_hint_show(void *data, struct seq_file *m) |
190 | { | |
191 | struct request_queue *q = data; | |
192 | int i; | |
193 | ||
194 | for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) | |
195 | seq_printf(m, "hint%d: %llu\n", i, q->write_hints[i]); | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | static ssize_t queue_write_hint_store(void *data, const char __user *buf, | |
201 | size_t count, loff_t *ppos) | |
202 | { | |
203 | struct request_queue *q = data; | |
204 | int i; | |
205 | ||
206 | for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) | |
207 | q->write_hints[i] = 0; | |
208 | ||
209 | return count; | |
210 | } | |
211 | ||
1209cb7f BVA |
212 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = { |
213 | { "poll_stat", 0400, queue_poll_stat_show }, | |
214 | { "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops }, | |
cd84a62e | 215 | { "pm_only", 0600, queue_pm_only_show, NULL }, |
1209cb7f BVA |
216 | { "state", 0600, queue_state_show, queue_state_write }, |
217 | { "write_hints", 0600, queue_write_hint_show, queue_write_hint_store }, | |
18bc4230 | 218 | { "zone_wlock", 0400, queue_zone_wlock_show, NULL }, |
1209cb7f BVA |
219 | { }, |
220 | }; | |
34dbad5d | 221 | |
1a435111 | 222 | #define HCTX_STATE_NAME(name) [BLK_MQ_S_##name] = #name |
f5c0b091 | 223 | static const char *const hctx_state_name[] = { |
1a435111 OS |
224 | HCTX_STATE_NAME(STOPPED), |
225 | HCTX_STATE_NAME(TAG_ACTIVE), | |
226 | HCTX_STATE_NAME(SCHED_RESTART), | |
f5c0b091 | 227 | }; |
1a435111 OS |
228 | #undef HCTX_STATE_NAME |
229 | ||
f57de23a | 230 | static int hctx_state_show(void *data, struct seq_file *m) |
9abb2ad2 | 231 | { |
f57de23a | 232 | struct blk_mq_hw_ctx *hctx = data; |
9abb2ad2 | 233 | |
f5c0b091 BVA |
234 | blk_flags_show(m, hctx->state, hctx_state_name, |
235 | ARRAY_SIZE(hctx_state_name)); | |
fd07dc81 | 236 | seq_puts(m, "\n"); |
9abb2ad2 OS |
237 | return 0; |
238 | } | |
239 | ||
1a435111 | 240 | #define BLK_TAG_ALLOC_NAME(name) [BLK_TAG_ALLOC_##name] = #name |
f5c0b091 | 241 | static const char *const alloc_policy_name[] = { |
1a435111 OS |
242 | BLK_TAG_ALLOC_NAME(FIFO), |
243 | BLK_TAG_ALLOC_NAME(RR), | |
f5c0b091 | 244 | }; |
1a435111 | 245 | #undef BLK_TAG_ALLOC_NAME |
f5c0b091 | 246 | |
1a435111 | 247 | #define HCTX_FLAG_NAME(name) [ilog2(BLK_MQ_F_##name)] = #name |
f5c0b091 | 248 | static const char *const hctx_flag_name[] = { |
1a435111 OS |
249 | HCTX_FLAG_NAME(SHOULD_MERGE), |
250 | HCTX_FLAG_NAME(TAG_SHARED), | |
1a435111 OS |
251 | HCTX_FLAG_NAME(BLOCKING), |
252 | HCTX_FLAG_NAME(NO_SCHED), | |
f5c0b091 | 253 | }; |
1a435111 | 254 | #undef HCTX_FLAG_NAME |
f5c0b091 | 255 | |
f57de23a | 256 | static int hctx_flags_show(void *data, struct seq_file *m) |
9abb2ad2 | 257 | { |
f57de23a | 258 | struct blk_mq_hw_ctx *hctx = data; |
f5c0b091 | 259 | const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags); |
9abb2ad2 | 260 | |
f5c0b091 BVA |
261 | seq_puts(m, "alloc_policy="); |
262 | if (alloc_policy < ARRAY_SIZE(alloc_policy_name) && | |
263 | alloc_policy_name[alloc_policy]) | |
264 | seq_puts(m, alloc_policy_name[alloc_policy]); | |
265 | else | |
266 | seq_printf(m, "%d", alloc_policy); | |
267 | seq_puts(m, " "); | |
268 | blk_flags_show(m, | |
269 | hctx->flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy), | |
270 | hctx_flag_name, ARRAY_SIZE(hctx_flag_name)); | |
fd07dc81 | 271 | seq_puts(m, "\n"); |
9abb2ad2 OS |
272 | return 0; |
273 | } | |
274 | ||
1a435111 | 275 | #define REQ_OP_NAME(name) [REQ_OP_##name] = #name |
8658dca8 | 276 | static const char *const op_name[] = { |
1a435111 OS |
277 | REQ_OP_NAME(READ), |
278 | REQ_OP_NAME(WRITE), | |
279 | REQ_OP_NAME(FLUSH), | |
280 | REQ_OP_NAME(DISCARD), | |
1a435111 OS |
281 | REQ_OP_NAME(SECURE_ERASE), |
282 | REQ_OP_NAME(ZONE_RESET), | |
283 | REQ_OP_NAME(WRITE_SAME), | |
284 | REQ_OP_NAME(WRITE_ZEROES), | |
285 | REQ_OP_NAME(SCSI_IN), | |
286 | REQ_OP_NAME(SCSI_OUT), | |
287 | REQ_OP_NAME(DRV_IN), | |
288 | REQ_OP_NAME(DRV_OUT), | |
8658dca8 | 289 | }; |
1a435111 | 290 | #undef REQ_OP_NAME |
8658dca8 | 291 | |
1a435111 | 292 | #define CMD_FLAG_NAME(name) [__REQ_##name] = #name |
8658dca8 | 293 | static const char *const cmd_flag_name[] = { |
1a435111 OS |
294 | CMD_FLAG_NAME(FAILFAST_DEV), |
295 | CMD_FLAG_NAME(FAILFAST_TRANSPORT), | |
296 | CMD_FLAG_NAME(FAILFAST_DRIVER), | |
297 | CMD_FLAG_NAME(SYNC), | |
298 | CMD_FLAG_NAME(META), | |
299 | CMD_FLAG_NAME(PRIO), | |
300 | CMD_FLAG_NAME(NOMERGE), | |
301 | CMD_FLAG_NAME(IDLE), | |
302 | CMD_FLAG_NAME(INTEGRITY), | |
303 | CMD_FLAG_NAME(FUA), | |
304 | CMD_FLAG_NAME(PREFLUSH), | |
305 | CMD_FLAG_NAME(RAHEAD), | |
306 | CMD_FLAG_NAME(BACKGROUND), | |
22d53821 | 307 | CMD_FLAG_NAME(NOWAIT), |
1c26010c JW |
308 | CMD_FLAG_NAME(NOUNMAP), |
309 | CMD_FLAG_NAME(HIPRI), | |
8658dca8 | 310 | }; |
1a435111 | 311 | #undef CMD_FLAG_NAME |
8658dca8 | 312 | |
1a435111 | 313 | #define RQF_NAME(name) [ilog2((__force u32)RQF_##name)] = #name |
8658dca8 | 314 | static const char *const rqf_name[] = { |
1a435111 | 315 | RQF_NAME(SORTED), |
85ba3eff | 316 | RQF_NAME(STARTED), |
1a435111 OS |
317 | RQF_NAME(SOFTBARRIER), |
318 | RQF_NAME(FLUSH_SEQ), | |
319 | RQF_NAME(MIXED_MERGE), | |
320 | RQF_NAME(MQ_INFLIGHT), | |
321 | RQF_NAME(DONTPREP), | |
322 | RQF_NAME(PREEMPT), | |
323 | RQF_NAME(COPY_USER), | |
324 | RQF_NAME(FAILED), | |
325 | RQF_NAME(QUIET), | |
326 | RQF_NAME(ELVPRIV), | |
327 | RQF_NAME(IO_STAT), | |
328 | RQF_NAME(ALLOCED), | |
329 | RQF_NAME(PM), | |
330 | RQF_NAME(HASHED), | |
331 | RQF_NAME(STATS), | |
332 | RQF_NAME(SPECIAL_PAYLOAD), | |
5d75d3f2 | 333 | RQF_NAME(ZONE_WRITE_LOCKED), |
76a86f9d | 334 | RQF_NAME(MQ_POLL_SLEPT), |
8658dca8 | 335 | }; |
1a435111 | 336 | #undef RQF_NAME |
8658dca8 | 337 | |
ec6dcf63 BVA |
338 | static const char *const blk_mq_rq_state_name_array[] = { |
339 | [MQ_RQ_IDLE] = "idle", | |
340 | [MQ_RQ_IN_FLIGHT] = "in_flight", | |
341 | [MQ_RQ_COMPLETE] = "complete", | |
342 | }; | |
343 | ||
344 | static const char *blk_mq_rq_state_name(enum mq_rq_state rq_state) | |
345 | { | |
a1e79188 | 346 | if (WARN_ON_ONCE((unsigned int)rq_state >= |
ec6dcf63 BVA |
347 | ARRAY_SIZE(blk_mq_rq_state_name_array))) |
348 | return "(?)"; | |
349 | return blk_mq_rq_state_name_array[rq_state]; | |
350 | } | |
351 | ||
daaadb3e | 352 | int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq) |
950cd7e9 | 353 | { |
2836ee4b | 354 | const struct blk_mq_ops *const mq_ops = rq->q->mq_ops; |
8658dca8 | 355 | const unsigned int op = rq->cmd_flags & REQ_OP_MASK; |
950cd7e9 | 356 | |
8658dca8 BVA |
357 | seq_printf(m, "%p {.op=", rq); |
358 | if (op < ARRAY_SIZE(op_name) && op_name[op]) | |
359 | seq_printf(m, "%s", op_name[op]); | |
360 | else | |
361 | seq_printf(m, "%d", op); | |
362 | seq_puts(m, ", .cmd_flags="); | |
363 | blk_flags_show(m, rq->cmd_flags & ~REQ_OP_MASK, cmd_flag_name, | |
364 | ARRAY_SIZE(cmd_flag_name)); | |
365 | seq_puts(m, ", .rq_flags="); | |
366 | blk_flags_show(m, (__force unsigned int)rq->rq_flags, rqf_name, | |
367 | ARRAY_SIZE(rqf_name)); | |
ec6dcf63 | 368 | seq_printf(m, ", .state=%s", blk_mq_rq_state_name(blk_mq_rq_state(rq))); |
2836ee4b | 369 | seq_printf(m, ", .tag=%d, .internal_tag=%d", rq->tag, |
8658dca8 | 370 | rq->internal_tag); |
2836ee4b BVA |
371 | if (mq_ops->show_rq) |
372 | mq_ops->show_rq(m, rq); | |
373 | seq_puts(m, "}\n"); | |
950cd7e9 OS |
374 | return 0; |
375 | } | |
daaadb3e OS |
376 | EXPORT_SYMBOL_GPL(__blk_mq_debugfs_rq_show); |
377 | ||
378 | int blk_mq_debugfs_rq_show(struct seq_file *m, void *v) | |
379 | { | |
380 | return __blk_mq_debugfs_rq_show(m, list_entry_rq(v)); | |
381 | } | |
16b738f6 | 382 | EXPORT_SYMBOL_GPL(blk_mq_debugfs_rq_show); |
950cd7e9 OS |
383 | |
384 | static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos) | |
f3bcb0e6 | 385 | __acquires(&hctx->lock) |
950cd7e9 OS |
386 | { |
387 | struct blk_mq_hw_ctx *hctx = m->private; | |
388 | ||
389 | spin_lock(&hctx->lock); | |
390 | return seq_list_start(&hctx->dispatch, *pos); | |
391 | } | |
392 | ||
393 | static void *hctx_dispatch_next(struct seq_file *m, void *v, loff_t *pos) | |
394 | { | |
395 | struct blk_mq_hw_ctx *hctx = m->private; | |
396 | ||
397 | return seq_list_next(v, &hctx->dispatch, pos); | |
398 | } | |
399 | ||
400 | static void hctx_dispatch_stop(struct seq_file *m, void *v) | |
f3bcb0e6 | 401 | __releases(&hctx->lock) |
950cd7e9 OS |
402 | { |
403 | struct blk_mq_hw_ctx *hctx = m->private; | |
404 | ||
405 | spin_unlock(&hctx->lock); | |
406 | } | |
407 | ||
408 | static const struct seq_operations hctx_dispatch_seq_ops = { | |
409 | .start = hctx_dispatch_start, | |
410 | .next = hctx_dispatch_next, | |
411 | .stop = hctx_dispatch_stop, | |
412 | .show = blk_mq_debugfs_rq_show, | |
413 | }; | |
414 | ||
2720bab5 BVA |
415 | struct show_busy_params { |
416 | struct seq_file *m; | |
417 | struct blk_mq_hw_ctx *hctx; | |
418 | }; | |
419 | ||
420 | /* | |
421 | * Note: the state of a request may change while this function is in progress, | |
7baa8572 JA |
422 | * e.g. due to a concurrent blk_mq_finish_request() call. Returns true to |
423 | * keep iterating requests. | |
2720bab5 | 424 | */ |
7baa8572 | 425 | static bool hctx_show_busy_rq(struct request *rq, void *data, bool reserved) |
2720bab5 BVA |
426 | { |
427 | const struct show_busy_params *params = data; | |
428 | ||
ea4f995e | 429 | if (rq->mq_hctx == params->hctx) |
2720bab5 BVA |
430 | __blk_mq_debugfs_rq_show(params->m, |
431 | list_entry_rq(&rq->queuelist)); | |
7baa8572 JA |
432 | |
433 | return true; | |
2720bab5 BVA |
434 | } |
435 | ||
436 | static int hctx_busy_show(void *data, struct seq_file *m) | |
437 | { | |
438 | struct blk_mq_hw_ctx *hctx = data; | |
439 | struct show_busy_params params = { .m = m, .hctx = hctx }; | |
440 | ||
441 | blk_mq_tagset_busy_iter(hctx->queue->tag_set, hctx_show_busy_rq, | |
442 | ¶ms); | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
346fc108 ML |
447 | static const char *const hctx_types[] = { |
448 | [HCTX_TYPE_DEFAULT] = "default", | |
449 | [HCTX_TYPE_READ] = "read", | |
450 | [HCTX_TYPE_POLL] = "poll", | |
451 | }; | |
452 | ||
453 | static int hctx_type_show(void *data, struct seq_file *m) | |
454 | { | |
455 | struct blk_mq_hw_ctx *hctx = data; | |
456 | ||
457 | BUILD_BUG_ON(ARRAY_SIZE(hctx_types) != HCTX_MAX_TYPES); | |
458 | seq_printf(m, "%s\n", hctx_types[hctx->type]); | |
459 | return 0; | |
460 | } | |
461 | ||
f57de23a | 462 | static int hctx_ctx_map_show(void *data, struct seq_file *m) |
0bfa5288 | 463 | { |
f57de23a | 464 | struct blk_mq_hw_ctx *hctx = data; |
0bfa5288 OS |
465 | |
466 | sbitmap_bitmap_show(&hctx->ctx_map, m); | |
467 | return 0; | |
468 | } | |
469 | ||
d96b37c0 OS |
470 | static void blk_mq_debugfs_tags_show(struct seq_file *m, |
471 | struct blk_mq_tags *tags) | |
472 | { | |
473 | seq_printf(m, "nr_tags=%u\n", tags->nr_tags); | |
474 | seq_printf(m, "nr_reserved_tags=%u\n", tags->nr_reserved_tags); | |
475 | seq_printf(m, "active_queues=%d\n", | |
476 | atomic_read(&tags->active_queues)); | |
477 | ||
478 | seq_puts(m, "\nbitmap_tags:\n"); | |
479 | sbitmap_queue_show(&tags->bitmap_tags, m); | |
480 | ||
481 | if (tags->nr_reserved_tags) { | |
482 | seq_puts(m, "\nbreserved_tags:\n"); | |
483 | sbitmap_queue_show(&tags->breserved_tags, m); | |
484 | } | |
485 | } | |
486 | ||
f57de23a | 487 | static int hctx_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 488 | { |
f57de23a | 489 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 490 | struct request_queue *q = hctx->queue; |
8c0f14ea | 491 | int res; |
d96b37c0 | 492 | |
8c0f14ea BVA |
493 | res = mutex_lock_interruptible(&q->sysfs_lock); |
494 | if (res) | |
495 | goto out; | |
d96b37c0 OS |
496 | if (hctx->tags) |
497 | blk_mq_debugfs_tags_show(m, hctx->tags); | |
498 | mutex_unlock(&q->sysfs_lock); | |
499 | ||
8c0f14ea BVA |
500 | out: |
501 | return res; | |
d96b37c0 OS |
502 | } |
503 | ||
f57de23a | 504 | static int hctx_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 505 | { |
f57de23a | 506 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 507 | struct request_queue *q = hctx->queue; |
8c0f14ea | 508 | int res; |
d7e3621a | 509 | |
8c0f14ea BVA |
510 | res = mutex_lock_interruptible(&q->sysfs_lock); |
511 | if (res) | |
512 | goto out; | |
d7e3621a OS |
513 | if (hctx->tags) |
514 | sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); | |
515 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
516 | |
517 | out: | |
518 | return res; | |
d7e3621a OS |
519 | } |
520 | ||
f57de23a | 521 | static int hctx_sched_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 522 | { |
f57de23a | 523 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 524 | struct request_queue *q = hctx->queue; |
8c0f14ea | 525 | int res; |
d96b37c0 | 526 | |
8c0f14ea BVA |
527 | res = mutex_lock_interruptible(&q->sysfs_lock); |
528 | if (res) | |
529 | goto out; | |
d96b37c0 OS |
530 | if (hctx->sched_tags) |
531 | blk_mq_debugfs_tags_show(m, hctx->sched_tags); | |
532 | mutex_unlock(&q->sysfs_lock); | |
533 | ||
8c0f14ea BVA |
534 | out: |
535 | return res; | |
d96b37c0 OS |
536 | } |
537 | ||
f57de23a | 538 | static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 539 | { |
f57de23a | 540 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 541 | struct request_queue *q = hctx->queue; |
8c0f14ea | 542 | int res; |
d7e3621a | 543 | |
8c0f14ea BVA |
544 | res = mutex_lock_interruptible(&q->sysfs_lock); |
545 | if (res) | |
546 | goto out; | |
d7e3621a OS |
547 | if (hctx->sched_tags) |
548 | sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); | |
549 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
550 | |
551 | out: | |
552 | return res; | |
d7e3621a OS |
553 | } |
554 | ||
f57de23a | 555 | static int hctx_io_poll_show(void *data, struct seq_file *m) |
be215473 | 556 | { |
f57de23a | 557 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
558 | |
559 | seq_printf(m, "considered=%lu\n", hctx->poll_considered); | |
560 | seq_printf(m, "invoked=%lu\n", hctx->poll_invoked); | |
561 | seq_printf(m, "success=%lu\n", hctx->poll_success); | |
562 | return 0; | |
563 | } | |
564 | ||
f57de23a | 565 | static ssize_t hctx_io_poll_write(void *data, const char __user *buf, |
be215473 OS |
566 | size_t count, loff_t *ppos) |
567 | { | |
f57de23a | 568 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
569 | |
570 | hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0; | |
571 | return count; | |
572 | } | |
573 | ||
f57de23a | 574 | static int hctx_dispatched_show(void *data, struct seq_file *m) |
be215473 | 575 | { |
f57de23a | 576 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
577 | int i; |
578 | ||
579 | seq_printf(m, "%8u\t%lu\n", 0U, hctx->dispatched[0]); | |
580 | ||
581 | for (i = 1; i < BLK_MQ_MAX_DISPATCH_ORDER - 1; i++) { | |
582 | unsigned int d = 1U << (i - 1); | |
583 | ||
584 | seq_printf(m, "%8u\t%lu\n", d, hctx->dispatched[i]); | |
585 | } | |
586 | ||
587 | seq_printf(m, "%8u+\t%lu\n", 1U << (i - 1), hctx->dispatched[i]); | |
588 | return 0; | |
589 | } | |
590 | ||
f57de23a | 591 | static ssize_t hctx_dispatched_write(void *data, const char __user *buf, |
be215473 OS |
592 | size_t count, loff_t *ppos) |
593 | { | |
f57de23a | 594 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
595 | int i; |
596 | ||
597 | for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) | |
598 | hctx->dispatched[i] = 0; | |
599 | return count; | |
600 | } | |
601 | ||
f57de23a | 602 | static int hctx_queued_show(void *data, struct seq_file *m) |
4a46f05e | 603 | { |
f57de23a | 604 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
605 | |
606 | seq_printf(m, "%lu\n", hctx->queued); | |
607 | return 0; | |
608 | } | |
609 | ||
f57de23a | 610 | static ssize_t hctx_queued_write(void *data, const char __user *buf, |
4a46f05e OS |
611 | size_t count, loff_t *ppos) |
612 | { | |
f57de23a | 613 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
614 | |
615 | hctx->queued = 0; | |
616 | return count; | |
617 | } | |
618 | ||
f57de23a | 619 | static int hctx_run_show(void *data, struct seq_file *m) |
4a46f05e | 620 | { |
f57de23a | 621 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
622 | |
623 | seq_printf(m, "%lu\n", hctx->run); | |
624 | return 0; | |
625 | } | |
626 | ||
f57de23a OS |
627 | static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count, |
628 | loff_t *ppos) | |
4a46f05e | 629 | { |
f57de23a | 630 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
631 | |
632 | hctx->run = 0; | |
633 | return count; | |
634 | } | |
635 | ||
f57de23a | 636 | static int hctx_active_show(void *data, struct seq_file *m) |
4a46f05e | 637 | { |
f57de23a | 638 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
639 | |
640 | seq_printf(m, "%d\n", atomic_read(&hctx->nr_active)); | |
641 | return 0; | |
642 | } | |
643 | ||
6e768717 ML |
644 | static int hctx_dispatch_busy_show(void *data, struct seq_file *m) |
645 | { | |
646 | struct blk_mq_hw_ctx *hctx = data; | |
647 | ||
648 | seq_printf(m, "%u\n", hctx->dispatch_busy); | |
649 | return 0; | |
650 | } | |
651 | ||
c16d6b5a ML |
652 | #define CTX_RQ_SEQ_OPS(name, type) \ |
653 | static void *ctx_##name##_rq_list_start(struct seq_file *m, loff_t *pos) \ | |
654 | __acquires(&ctx->lock) \ | |
655 | { \ | |
656 | struct blk_mq_ctx *ctx = m->private; \ | |
657 | \ | |
658 | spin_lock(&ctx->lock); \ | |
659 | return seq_list_start(&ctx->rq_lists[type], *pos); \ | |
660 | } \ | |
661 | \ | |
662 | static void *ctx_##name##_rq_list_next(struct seq_file *m, void *v, \ | |
663 | loff_t *pos) \ | |
664 | { \ | |
665 | struct blk_mq_ctx *ctx = m->private; \ | |
666 | \ | |
667 | return seq_list_next(v, &ctx->rq_lists[type], pos); \ | |
668 | } \ | |
669 | \ | |
670 | static void ctx_##name##_rq_list_stop(struct seq_file *m, void *v) \ | |
671 | __releases(&ctx->lock) \ | |
672 | { \ | |
673 | struct blk_mq_ctx *ctx = m->private; \ | |
674 | \ | |
675 | spin_unlock(&ctx->lock); \ | |
676 | } \ | |
677 | \ | |
678 | static const struct seq_operations ctx_##name##_rq_list_seq_ops = { \ | |
679 | .start = ctx_##name##_rq_list_start, \ | |
680 | .next = ctx_##name##_rq_list_next, \ | |
681 | .stop = ctx_##name##_rq_list_stop, \ | |
682 | .show = blk_mq_debugfs_rq_show, \ | |
683 | } | |
684 | ||
685 | CTX_RQ_SEQ_OPS(default, HCTX_TYPE_DEFAULT); | |
686 | CTX_RQ_SEQ_OPS(read, HCTX_TYPE_READ); | |
687 | CTX_RQ_SEQ_OPS(poll, HCTX_TYPE_POLL); | |
950cd7e9 | 688 | |
f57de23a | 689 | static int ctx_dispatched_show(void *data, struct seq_file *m) |
4a46f05e | 690 | { |
f57de23a | 691 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
692 | |
693 | seq_printf(m, "%lu %lu\n", ctx->rq_dispatched[1], ctx->rq_dispatched[0]); | |
694 | return 0; | |
695 | } | |
696 | ||
f57de23a | 697 | static ssize_t ctx_dispatched_write(void *data, const char __user *buf, |
4a46f05e OS |
698 | size_t count, loff_t *ppos) |
699 | { | |
f57de23a | 700 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
701 | |
702 | ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0; | |
703 | return count; | |
704 | } | |
705 | ||
f57de23a | 706 | static int ctx_merged_show(void *data, struct seq_file *m) |
4a46f05e | 707 | { |
f57de23a | 708 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
709 | |
710 | seq_printf(m, "%lu\n", ctx->rq_merged); | |
711 | return 0; | |
712 | } | |
713 | ||
f57de23a OS |
714 | static ssize_t ctx_merged_write(void *data, const char __user *buf, |
715 | size_t count, loff_t *ppos) | |
4a46f05e | 716 | { |
f57de23a | 717 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
718 | |
719 | ctx->rq_merged = 0; | |
720 | return count; | |
721 | } | |
722 | ||
f57de23a | 723 | static int ctx_completed_show(void *data, struct seq_file *m) |
4a46f05e | 724 | { |
f57de23a | 725 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
726 | |
727 | seq_printf(m, "%lu %lu\n", ctx->rq_completed[1], ctx->rq_completed[0]); | |
728 | return 0; | |
729 | } | |
730 | ||
f57de23a OS |
731 | static ssize_t ctx_completed_write(void *data, const char __user *buf, |
732 | size_t count, loff_t *ppos) | |
4a46f05e | 733 | { |
f57de23a OS |
734 | struct blk_mq_ctx *ctx = data; |
735 | ||
736 | ctx->rq_completed[0] = ctx->rq_completed[1] = 0; | |
737 | return count; | |
4a46f05e OS |
738 | } |
739 | ||
f57de23a OS |
740 | static int blk_mq_debugfs_show(struct seq_file *m, void *v) |
741 | { | |
742 | const struct blk_mq_debugfs_attr *attr = m->private; | |
743 | void *data = d_inode(m->file->f_path.dentry->d_parent)->i_private; | |
744 | ||
745 | return attr->show(data, m); | |
746 | } | |
747 | ||
748 | static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf, | |
749 | size_t count, loff_t *ppos) | |
4a46f05e OS |
750 | { |
751 | struct seq_file *m = file->private_data; | |
f57de23a OS |
752 | const struct blk_mq_debugfs_attr *attr = m->private; |
753 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
4a46f05e | 754 | |
6b136a24 EG |
755 | /* |
756 | * Attributes that only implement .seq_ops are read-only and 'attr' is | |
757 | * the same with 'data' in this case. | |
758 | */ | |
759 | if (attr == data || !attr->write) | |
f57de23a OS |
760 | return -EPERM; |
761 | ||
762 | return attr->write(data, buf, count, ppos); | |
763 | } | |
764 | ||
765 | static int blk_mq_debugfs_open(struct inode *inode, struct file *file) | |
766 | { | |
767 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
768 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
769 | struct seq_file *m; | |
770 | int ret; | |
771 | ||
772 | if (attr->seq_ops) { | |
773 | ret = seq_open(file, attr->seq_ops); | |
774 | if (!ret) { | |
775 | m = file->private_data; | |
776 | m->private = data; | |
777 | } | |
778 | return ret; | |
779 | } | |
780 | ||
781 | if (WARN_ON_ONCE(!attr->show)) | |
782 | return -EPERM; | |
783 | ||
784 | return single_open(file, blk_mq_debugfs_show, inode->i_private); | |
4a46f05e OS |
785 | } |
786 | ||
f57de23a OS |
787 | static int blk_mq_debugfs_release(struct inode *inode, struct file *file) |
788 | { | |
789 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
790 | ||
791 | if (attr->show) | |
792 | return single_release(inode, file); | |
793 | else | |
794 | return seq_release(inode, file); | |
795 | } | |
796 | ||
f8465933 | 797 | static const struct file_operations blk_mq_debugfs_fops = { |
f57de23a | 798 | .open = blk_mq_debugfs_open, |
4a46f05e | 799 | .read = seq_read, |
f57de23a | 800 | .write = blk_mq_debugfs_write, |
4a46f05e | 801 | .llseek = seq_lseek, |
f57de23a | 802 | .release = blk_mq_debugfs_release, |
4a46f05e OS |
803 | }; |
804 | ||
07e4fead | 805 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { |
f57de23a OS |
806 | {"state", 0400, hctx_state_show}, |
807 | {"flags", 0400, hctx_flags_show}, | |
808 | {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops}, | |
2720bab5 | 809 | {"busy", 0400, hctx_busy_show}, |
f57de23a OS |
810 | {"ctx_map", 0400, hctx_ctx_map_show}, |
811 | {"tags", 0400, hctx_tags_show}, | |
812 | {"tags_bitmap", 0400, hctx_tags_bitmap_show}, | |
813 | {"sched_tags", 0400, hctx_sched_tags_show}, | |
814 | {"sched_tags_bitmap", 0400, hctx_sched_tags_bitmap_show}, | |
815 | {"io_poll", 0600, hctx_io_poll_show, hctx_io_poll_write}, | |
816 | {"dispatched", 0600, hctx_dispatched_show, hctx_dispatched_write}, | |
817 | {"queued", 0600, hctx_queued_show, hctx_queued_write}, | |
818 | {"run", 0600, hctx_run_show, hctx_run_write}, | |
819 | {"active", 0400, hctx_active_show}, | |
6e768717 | 820 | {"dispatch_busy", 0400, hctx_dispatch_busy_show}, |
346fc108 | 821 | {"type", 0400, hctx_type_show}, |
72f2f8f6 | 822 | {}, |
07e4fead OS |
823 | }; |
824 | ||
825 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { | |
c16d6b5a ML |
826 | {"default_rq_list", 0400, .seq_ops = &ctx_default_rq_list_seq_ops}, |
827 | {"read_rq_list", 0400, .seq_ops = &ctx_read_rq_list_seq_ops}, | |
828 | {"poll_rq_list", 0400, .seq_ops = &ctx_poll_rq_list_seq_ops}, | |
f57de23a OS |
829 | {"dispatched", 0600, ctx_dispatched_show, ctx_dispatched_write}, |
830 | {"merged", 0600, ctx_merged_show, ctx_merged_write}, | |
831 | {"completed", 0600, ctx_completed_show, ctx_completed_write}, | |
72f2f8f6 | 832 | {}, |
07e4fead OS |
833 | }; |
834 | ||
9c1051aa OS |
835 | static bool debugfs_create_files(struct dentry *parent, void *data, |
836 | const struct blk_mq_debugfs_attr *attr) | |
837 | { | |
36991ca6 GKH |
838 | if (IS_ERR_OR_NULL(parent)) |
839 | return false; | |
840 | ||
9c1051aa OS |
841 | d_inode(parent)->i_private = data; |
842 | ||
843 | for (; attr->name; attr++) { | |
844 | if (!debugfs_create_file(attr->name, attr->mode, parent, | |
845 | (void *)attr, &blk_mq_debugfs_fops)) | |
846 | return false; | |
847 | } | |
848 | return true; | |
849 | } | |
850 | ||
4c9e4019 | 851 | int blk_mq_debugfs_register(struct request_queue *q) |
07e4fead | 852 | { |
9c1051aa OS |
853 | struct blk_mq_hw_ctx *hctx; |
854 | int i; | |
855 | ||
18fbda91 | 856 | if (!blk_debugfs_root) |
07e4fead OS |
857 | return -ENOENT; |
858 | ||
4c9e4019 BVA |
859 | q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent), |
860 | blk_debugfs_root); | |
07e4fead | 861 | if (!q->debugfs_dir) |
9c1051aa | 862 | return -ENOMEM; |
07e4fead | 863 | |
9c1051aa OS |
864 | if (!debugfs_create_files(q->debugfs_dir, q, |
865 | blk_mq_debugfs_queue_attrs)) | |
07e4fead OS |
866 | goto err; |
867 | ||
9c1051aa | 868 | /* |
70e62f4b | 869 | * blk_mq_init_sched() attempted to do this already, but q->debugfs_dir |
9c1051aa OS |
870 | * didn't exist yet (because we don't know what to name the directory |
871 | * until the queue is registered to a gendisk). | |
872 | */ | |
70e62f4b OS |
873 | if (q->elevator && !q->sched_debugfs_dir) |
874 | blk_mq_debugfs_register_sched(q); | |
875 | ||
876 | /* Similarly, blk_mq_init_hctx() couldn't do this previously. */ | |
9c1051aa OS |
877 | queue_for_each_hw_ctx(q, hctx, i) { |
878 | if (!hctx->debugfs_dir && blk_mq_debugfs_register_hctx(q, hctx)) | |
879 | goto err; | |
d332ce09 OS |
880 | if (q->elevator && !hctx->sched_debugfs_dir && |
881 | blk_mq_debugfs_register_sched_hctx(q, hctx)) | |
882 | goto err; | |
9c1051aa OS |
883 | } |
884 | ||
cc56694f ML |
885 | if (q->rq_qos) { |
886 | struct rq_qos *rqos = q->rq_qos; | |
887 | ||
888 | while (rqos) { | |
889 | blk_mq_debugfs_register_rqos(rqos); | |
890 | rqos = rqos->next; | |
891 | } | |
892 | } | |
893 | ||
07e4fead OS |
894 | return 0; |
895 | ||
896 | err: | |
897 | blk_mq_debugfs_unregister(q); | |
898 | return -ENOMEM; | |
899 | } | |
900 | ||
901 | void blk_mq_debugfs_unregister(struct request_queue *q) | |
902 | { | |
903 | debugfs_remove_recursive(q->debugfs_dir); | |
d332ce09 | 904 | q->sched_debugfs_dir = NULL; |
07e4fead OS |
905 | q->debugfs_dir = NULL; |
906 | } | |
907 | ||
9c1051aa OS |
908 | static int blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx, |
909 | struct blk_mq_ctx *ctx) | |
07e4fead OS |
910 | { |
911 | struct dentry *ctx_dir; | |
912 | char name[20]; | |
07e4fead OS |
913 | |
914 | snprintf(name, sizeof(name), "cpu%u", ctx->cpu); | |
9c1051aa | 915 | ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir); |
07e4fead OS |
916 | if (!ctx_dir) |
917 | return -ENOMEM; | |
918 | ||
72f2f8f6 BVA |
919 | if (!debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs)) |
920 | return -ENOMEM; | |
07e4fead OS |
921 | |
922 | return 0; | |
923 | } | |
924 | ||
9c1051aa OS |
925 | int blk_mq_debugfs_register_hctx(struct request_queue *q, |
926 | struct blk_mq_hw_ctx *hctx) | |
07e4fead OS |
927 | { |
928 | struct blk_mq_ctx *ctx; | |
07e4fead OS |
929 | char name[20]; |
930 | int i; | |
931 | ||
9c1051aa OS |
932 | if (!q->debugfs_dir) |
933 | return -ENOENT; | |
934 | ||
88aabbd7 | 935 | snprintf(name, sizeof(name), "hctx%u", hctx->queue_num); |
9c1051aa OS |
936 | hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir); |
937 | if (!hctx->debugfs_dir) | |
07e4fead OS |
938 | return -ENOMEM; |
939 | ||
9c1051aa OS |
940 | if (!debugfs_create_files(hctx->debugfs_dir, hctx, |
941 | blk_mq_debugfs_hctx_attrs)) | |
942 | goto err; | |
07e4fead OS |
943 | |
944 | hctx_for_each_ctx(hctx, ctx, i) { | |
9c1051aa OS |
945 | if (blk_mq_debugfs_register_ctx(hctx, ctx)) |
946 | goto err; | |
07e4fead OS |
947 | } |
948 | ||
949 | return 0; | |
9c1051aa OS |
950 | |
951 | err: | |
952 | blk_mq_debugfs_unregister_hctx(hctx); | |
953 | return -ENOMEM; | |
954 | } | |
955 | ||
956 | void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx) | |
957 | { | |
958 | debugfs_remove_recursive(hctx->debugfs_dir); | |
d332ce09 | 959 | hctx->sched_debugfs_dir = NULL; |
9c1051aa | 960 | hctx->debugfs_dir = NULL; |
07e4fead OS |
961 | } |
962 | ||
9c1051aa | 963 | int blk_mq_debugfs_register_hctxs(struct request_queue *q) |
07e4fead OS |
964 | { |
965 | struct blk_mq_hw_ctx *hctx; | |
966 | int i; | |
967 | ||
07e4fead OS |
968 | queue_for_each_hw_ctx(q, hctx, i) { |
969 | if (blk_mq_debugfs_register_hctx(q, hctx)) | |
9c1051aa | 970 | return -ENOMEM; |
07e4fead OS |
971 | } |
972 | ||
973 | return 0; | |
07e4fead OS |
974 | } |
975 | ||
9c1051aa | 976 | void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) |
07e4fead | 977 | { |
9c1051aa OS |
978 | struct blk_mq_hw_ctx *hctx; |
979 | int i; | |
980 | ||
981 | queue_for_each_hw_ctx(q, hctx, i) | |
982 | blk_mq_debugfs_unregister_hctx(hctx); | |
07e4fead | 983 | } |
d332ce09 OS |
984 | |
985 | int blk_mq_debugfs_register_sched(struct request_queue *q) | |
986 | { | |
987 | struct elevator_type *e = q->elevator->type; | |
988 | ||
989 | if (!q->debugfs_dir) | |
990 | return -ENOENT; | |
991 | ||
992 | if (!e->queue_debugfs_attrs) | |
993 | return 0; | |
994 | ||
995 | q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir); | |
996 | if (!q->sched_debugfs_dir) | |
997 | return -ENOMEM; | |
998 | ||
999 | if (!debugfs_create_files(q->sched_debugfs_dir, q, | |
1000 | e->queue_debugfs_attrs)) | |
1001 | goto err; | |
1002 | ||
1003 | return 0; | |
1004 | ||
1005 | err: | |
1006 | blk_mq_debugfs_unregister_sched(q); | |
1007 | return -ENOMEM; | |
1008 | } | |
1009 | ||
1010 | void blk_mq_debugfs_unregister_sched(struct request_queue *q) | |
1011 | { | |
1012 | debugfs_remove_recursive(q->sched_debugfs_dir); | |
1013 | q->sched_debugfs_dir = NULL; | |
1014 | } | |
1015 | ||
cc56694f ML |
1016 | void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos) |
1017 | { | |
1018 | debugfs_remove_recursive(rqos->debugfs_dir); | |
1019 | rqos->debugfs_dir = NULL; | |
1020 | } | |
1021 | ||
1022 | int blk_mq_debugfs_register_rqos(struct rq_qos *rqos) | |
1023 | { | |
1024 | struct request_queue *q = rqos->q; | |
1025 | const char *dir_name = rq_qos_id_to_name(rqos->id); | |
1026 | ||
1027 | if (!q->debugfs_dir) | |
1028 | return -ENOENT; | |
1029 | ||
1030 | if (rqos->debugfs_dir || !rqos->ops->debugfs_attrs) | |
1031 | return 0; | |
1032 | ||
1033 | if (!q->rqos_debugfs_dir) { | |
1034 | q->rqos_debugfs_dir = debugfs_create_dir("rqos", | |
1035 | q->debugfs_dir); | |
1036 | if (!q->rqos_debugfs_dir) | |
1037 | return -ENOMEM; | |
1038 | } | |
1039 | ||
1040 | rqos->debugfs_dir = debugfs_create_dir(dir_name, | |
1041 | rqos->q->rqos_debugfs_dir); | |
1042 | if (!rqos->debugfs_dir) | |
1043 | return -ENOMEM; | |
1044 | ||
1045 | if (!debugfs_create_files(rqos->debugfs_dir, rqos, | |
1046 | rqos->ops->debugfs_attrs)) | |
1047 | goto err; | |
1048 | return 0; | |
1049 | err: | |
1050 | blk_mq_debugfs_unregister_rqos(rqos); | |
1051 | return -ENOMEM; | |
1052 | } | |
1053 | ||
1054 | void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q) | |
1055 | { | |
1056 | debugfs_remove_recursive(q->rqos_debugfs_dir); | |
1057 | q->rqos_debugfs_dir = NULL; | |
1058 | } | |
1059 | ||
d332ce09 OS |
1060 | int blk_mq_debugfs_register_sched_hctx(struct request_queue *q, |
1061 | struct blk_mq_hw_ctx *hctx) | |
1062 | { | |
1063 | struct elevator_type *e = q->elevator->type; | |
1064 | ||
1065 | if (!hctx->debugfs_dir) | |
1066 | return -ENOENT; | |
1067 | ||
1068 | if (!e->hctx_debugfs_attrs) | |
1069 | return 0; | |
1070 | ||
1071 | hctx->sched_debugfs_dir = debugfs_create_dir("sched", | |
1072 | hctx->debugfs_dir); | |
1073 | if (!hctx->sched_debugfs_dir) | |
1074 | return -ENOMEM; | |
1075 | ||
1076 | if (!debugfs_create_files(hctx->sched_debugfs_dir, hctx, | |
1077 | e->hctx_debugfs_attrs)) | |
1078 | return -ENOMEM; | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx) | |
1084 | { | |
1085 | debugfs_remove_recursive(hctx->sched_debugfs_dir); | |
1086 | hctx->sched_debugfs_dir = NULL; | |
1087 | } |