Commit | Line | Data |
---|---|---|
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" |
07e4fead | 26 | |
91d68905 BVA |
27 | static int blk_flags_show(struct seq_file *m, const unsigned long flags, |
28 | const char *const *flag_name, int flag_name_count) | |
29 | { | |
30 | bool sep = false; | |
31 | int i; | |
32 | ||
33 | for (i = 0; i < sizeof(flags) * BITS_PER_BYTE; i++) { | |
34 | if (!(flags & BIT(i))) | |
35 | continue; | |
36 | if (sep) | |
bec03d6b | 37 | seq_puts(m, "|"); |
91d68905 BVA |
38 | sep = true; |
39 | if (i < flag_name_count && flag_name[i]) | |
40 | seq_puts(m, flag_name[i]); | |
41 | else | |
42 | seq_printf(m, "%d", i); | |
43 | } | |
91d68905 BVA |
44 | return 0; |
45 | } | |
46 | ||
1a435111 | 47 | #define QUEUE_FLAG_NAME(name) [QUEUE_FLAG_##name] = #name |
91d68905 | 48 | static const char *const blk_queue_flag_name[] = { |
1a435111 OS |
49 | QUEUE_FLAG_NAME(QUEUED), |
50 | QUEUE_FLAG_NAME(STOPPED), | |
1a435111 OS |
51 | QUEUE_FLAG_NAME(DYING), |
52 | QUEUE_FLAG_NAME(BYPASS), | |
53 | QUEUE_FLAG_NAME(BIDI), | |
54 | QUEUE_FLAG_NAME(NOMERGES), | |
55 | QUEUE_FLAG_NAME(SAME_COMP), | |
56 | QUEUE_FLAG_NAME(FAIL_IO), | |
57 | QUEUE_FLAG_NAME(STACKABLE), | |
58 | QUEUE_FLAG_NAME(NONROT), | |
59 | QUEUE_FLAG_NAME(IO_STAT), | |
60 | QUEUE_FLAG_NAME(DISCARD), | |
61 | QUEUE_FLAG_NAME(NOXMERGES), | |
62 | QUEUE_FLAG_NAME(ADD_RANDOM), | |
63 | QUEUE_FLAG_NAME(SECERASE), | |
64 | QUEUE_FLAG_NAME(SAME_FORCE), | |
65 | QUEUE_FLAG_NAME(DEAD), | |
66 | QUEUE_FLAG_NAME(INIT_DONE), | |
67 | QUEUE_FLAG_NAME(NO_SG_MERGE), | |
68 | QUEUE_FLAG_NAME(POLL), | |
69 | QUEUE_FLAG_NAME(WC), | |
70 | QUEUE_FLAG_NAME(FUA), | |
71 | QUEUE_FLAG_NAME(FLUSH_NQ), | |
72 | QUEUE_FLAG_NAME(DAX), | |
73 | QUEUE_FLAG_NAME(STATS), | |
74 | QUEUE_FLAG_NAME(POLL_STATS), | |
75 | QUEUE_FLAG_NAME(REGISTERED), | |
22d53821 BVA |
76 | QUEUE_FLAG_NAME(SCSI_PASSTHROUGH), |
77 | QUEUE_FLAG_NAME(QUIESCED), | |
91d68905 | 78 | }; |
1a435111 | 79 | #undef QUEUE_FLAG_NAME |
91d68905 | 80 | |
f57de23a | 81 | static int queue_state_show(void *data, struct seq_file *m) |
91d68905 | 82 | { |
f57de23a | 83 | struct request_queue *q = data; |
91d68905 BVA |
84 | |
85 | blk_flags_show(m, q->queue_flags, blk_queue_flag_name, | |
86 | ARRAY_SIZE(blk_queue_flag_name)); | |
fd07dc81 | 87 | seq_puts(m, "\n"); |
91d68905 BVA |
88 | return 0; |
89 | } | |
90 | ||
f57de23a OS |
91 | static ssize_t queue_state_write(void *data, const char __user *buf, |
92 | size_t count, loff_t *ppos) | |
91d68905 | 93 | { |
f57de23a | 94 | struct request_queue *q = data; |
71b90511 | 95 | char opbuf[16] = { }, *op; |
91d68905 | 96 | |
18d4d7d0 BVA |
97 | /* |
98 | * The "state" attribute is removed after blk_cleanup_queue() has called | |
99 | * blk_mq_free_queue(). Return if QUEUE_FLAG_DEAD has been set to avoid | |
100 | * triggering a use-after-free. | |
101 | */ | |
102 | if (blk_queue_dead(q)) | |
103 | return -ENOENT; | |
104 | ||
71b90511 | 105 | if (count >= sizeof(opbuf)) { |
c7e4145a OS |
106 | pr_err("%s: operation too long\n", __func__); |
107 | goto inval; | |
108 | } | |
109 | ||
71b90511 | 110 | if (copy_from_user(opbuf, buf, count)) |
91d68905 | 111 | return -EFAULT; |
71b90511 | 112 | op = strstrip(opbuf); |
91d68905 BVA |
113 | if (strcmp(op, "run") == 0) { |
114 | blk_mq_run_hw_queues(q, true); | |
115 | } else if (strcmp(op, "start") == 0) { | |
116 | blk_mq_start_stopped_hw_queues(q, true); | |
edea55ab BVA |
117 | } else if (strcmp(op, "kick") == 0) { |
118 | blk_mq_kick_requeue_list(q); | |
91d68905 | 119 | } else { |
c7e4145a OS |
120 | pr_err("%s: unsupported operation '%s'\n", __func__, op); |
121 | inval: | |
edea55ab | 122 | pr_err("%s: use 'run', 'start' or 'kick'\n", __func__); |
91d68905 BVA |
123 | return -EINVAL; |
124 | } | |
c7e4145a | 125 | return count; |
91d68905 BVA |
126 | } |
127 | ||
34dbad5d OS |
128 | static void print_stat(struct seq_file *m, struct blk_rq_stat *stat) |
129 | { | |
130 | if (stat->nr_samples) { | |
131 | seq_printf(m, "samples=%d, mean=%lld, min=%llu, max=%llu", | |
132 | stat->nr_samples, stat->mean, stat->min, stat->max); | |
133 | } else { | |
134 | seq_puts(m, "samples=0"); | |
135 | } | |
136 | } | |
137 | ||
f793dfd3 JA |
138 | static int queue_write_hint_show(void *data, struct seq_file *m) |
139 | { | |
140 | struct request_queue *q = data; | |
141 | int i; | |
142 | ||
143 | for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) | |
144 | seq_printf(m, "hint%d: %llu\n", i, q->write_hints[i]); | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | static ssize_t queue_write_hint_store(void *data, const char __user *buf, | |
150 | size_t count, loff_t *ppos) | |
151 | { | |
152 | struct request_queue *q = data; | |
153 | int i; | |
154 | ||
155 | for (i = 0; i < BLK_MAX_WRITE_HINTS; i++) | |
156 | q->write_hints[i] = 0; | |
157 | ||
158 | return count; | |
159 | } | |
160 | ||
f57de23a | 161 | static int queue_poll_stat_show(void *data, struct seq_file *m) |
34dbad5d | 162 | { |
f57de23a | 163 | struct request_queue *q = data; |
0206319f | 164 | int bucket; |
34dbad5d | 165 | |
0206319f SB |
166 | for (bucket = 0; bucket < BLK_MQ_POLL_STATS_BKTS/2; bucket++) { |
167 | seq_printf(m, "read (%d Bytes): ", 1 << (9+bucket)); | |
168 | print_stat(m, &q->poll_stat[2*bucket]); | |
169 | seq_puts(m, "\n"); | |
34dbad5d | 170 | |
0206319f SB |
171 | seq_printf(m, "write (%d Bytes): ", 1 << (9+bucket)); |
172 | print_stat(m, &q->poll_stat[2*bucket+1]); | |
173 | seq_puts(m, "\n"); | |
174 | } | |
34dbad5d OS |
175 | return 0; |
176 | } | |
177 | ||
1a435111 | 178 | #define HCTX_STATE_NAME(name) [BLK_MQ_S_##name] = #name |
f5c0b091 | 179 | static const char *const hctx_state_name[] = { |
1a435111 OS |
180 | HCTX_STATE_NAME(STOPPED), |
181 | HCTX_STATE_NAME(TAG_ACTIVE), | |
182 | HCTX_STATE_NAME(SCHED_RESTART), | |
183 | HCTX_STATE_NAME(TAG_WAITING), | |
184 | HCTX_STATE_NAME(START_ON_RUN), | |
f5c0b091 | 185 | }; |
1a435111 OS |
186 | #undef HCTX_STATE_NAME |
187 | ||
f57de23a | 188 | static int hctx_state_show(void *data, struct seq_file *m) |
9abb2ad2 | 189 | { |
f57de23a | 190 | struct blk_mq_hw_ctx *hctx = data; |
9abb2ad2 | 191 | |
f5c0b091 BVA |
192 | blk_flags_show(m, hctx->state, hctx_state_name, |
193 | ARRAY_SIZE(hctx_state_name)); | |
fd07dc81 | 194 | seq_puts(m, "\n"); |
9abb2ad2 OS |
195 | return 0; |
196 | } | |
197 | ||
1a435111 | 198 | #define BLK_TAG_ALLOC_NAME(name) [BLK_TAG_ALLOC_##name] = #name |
f5c0b091 | 199 | static const char *const alloc_policy_name[] = { |
1a435111 OS |
200 | BLK_TAG_ALLOC_NAME(FIFO), |
201 | BLK_TAG_ALLOC_NAME(RR), | |
f5c0b091 | 202 | }; |
1a435111 | 203 | #undef BLK_TAG_ALLOC_NAME |
f5c0b091 | 204 | |
1a435111 | 205 | #define HCTX_FLAG_NAME(name) [ilog2(BLK_MQ_F_##name)] = #name |
f5c0b091 | 206 | static const char *const hctx_flag_name[] = { |
1a435111 OS |
207 | HCTX_FLAG_NAME(SHOULD_MERGE), |
208 | HCTX_FLAG_NAME(TAG_SHARED), | |
209 | HCTX_FLAG_NAME(SG_MERGE), | |
210 | HCTX_FLAG_NAME(BLOCKING), | |
211 | HCTX_FLAG_NAME(NO_SCHED), | |
f5c0b091 | 212 | }; |
1a435111 | 213 | #undef HCTX_FLAG_NAME |
f5c0b091 | 214 | |
f57de23a | 215 | static int hctx_flags_show(void *data, struct seq_file *m) |
9abb2ad2 | 216 | { |
f57de23a | 217 | struct blk_mq_hw_ctx *hctx = data; |
f5c0b091 | 218 | const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags); |
9abb2ad2 | 219 | |
f5c0b091 BVA |
220 | seq_puts(m, "alloc_policy="); |
221 | if (alloc_policy < ARRAY_SIZE(alloc_policy_name) && | |
222 | alloc_policy_name[alloc_policy]) | |
223 | seq_puts(m, alloc_policy_name[alloc_policy]); | |
224 | else | |
225 | seq_printf(m, "%d", alloc_policy); | |
226 | seq_puts(m, " "); | |
227 | blk_flags_show(m, | |
228 | hctx->flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy), | |
229 | hctx_flag_name, ARRAY_SIZE(hctx_flag_name)); | |
fd07dc81 | 230 | seq_puts(m, "\n"); |
9abb2ad2 OS |
231 | return 0; |
232 | } | |
233 | ||
1a435111 | 234 | #define REQ_OP_NAME(name) [REQ_OP_##name] = #name |
8658dca8 | 235 | static const char *const op_name[] = { |
1a435111 OS |
236 | REQ_OP_NAME(READ), |
237 | REQ_OP_NAME(WRITE), | |
238 | REQ_OP_NAME(FLUSH), | |
239 | REQ_OP_NAME(DISCARD), | |
240 | REQ_OP_NAME(ZONE_REPORT), | |
241 | REQ_OP_NAME(SECURE_ERASE), | |
242 | REQ_OP_NAME(ZONE_RESET), | |
243 | REQ_OP_NAME(WRITE_SAME), | |
244 | REQ_OP_NAME(WRITE_ZEROES), | |
245 | REQ_OP_NAME(SCSI_IN), | |
246 | REQ_OP_NAME(SCSI_OUT), | |
247 | REQ_OP_NAME(DRV_IN), | |
248 | REQ_OP_NAME(DRV_OUT), | |
8658dca8 | 249 | }; |
1a435111 | 250 | #undef REQ_OP_NAME |
8658dca8 | 251 | |
1a435111 | 252 | #define CMD_FLAG_NAME(name) [__REQ_##name] = #name |
8658dca8 | 253 | static const char *const cmd_flag_name[] = { |
1a435111 OS |
254 | CMD_FLAG_NAME(FAILFAST_DEV), |
255 | CMD_FLAG_NAME(FAILFAST_TRANSPORT), | |
256 | CMD_FLAG_NAME(FAILFAST_DRIVER), | |
257 | CMD_FLAG_NAME(SYNC), | |
258 | CMD_FLAG_NAME(META), | |
259 | CMD_FLAG_NAME(PRIO), | |
260 | CMD_FLAG_NAME(NOMERGE), | |
261 | CMD_FLAG_NAME(IDLE), | |
262 | CMD_FLAG_NAME(INTEGRITY), | |
263 | CMD_FLAG_NAME(FUA), | |
264 | CMD_FLAG_NAME(PREFLUSH), | |
265 | CMD_FLAG_NAME(RAHEAD), | |
266 | CMD_FLAG_NAME(BACKGROUND), | |
267 | CMD_FLAG_NAME(NOUNMAP), | |
22d53821 | 268 | CMD_FLAG_NAME(NOWAIT), |
8658dca8 | 269 | }; |
1a435111 | 270 | #undef CMD_FLAG_NAME |
8658dca8 | 271 | |
1a435111 | 272 | #define RQF_NAME(name) [ilog2((__force u32)RQF_##name)] = #name |
8658dca8 | 273 | static const char *const rqf_name[] = { |
1a435111 OS |
274 | RQF_NAME(SORTED), |
275 | RQF_NAME(STARTED), | |
276 | RQF_NAME(QUEUED), | |
277 | RQF_NAME(SOFTBARRIER), | |
278 | RQF_NAME(FLUSH_SEQ), | |
279 | RQF_NAME(MIXED_MERGE), | |
280 | RQF_NAME(MQ_INFLIGHT), | |
281 | RQF_NAME(DONTPREP), | |
282 | RQF_NAME(PREEMPT), | |
283 | RQF_NAME(COPY_USER), | |
284 | RQF_NAME(FAILED), | |
285 | RQF_NAME(QUIET), | |
286 | RQF_NAME(ELVPRIV), | |
287 | RQF_NAME(IO_STAT), | |
288 | RQF_NAME(ALLOCED), | |
289 | RQF_NAME(PM), | |
290 | RQF_NAME(HASHED), | |
291 | RQF_NAME(STATS), | |
292 | RQF_NAME(SPECIAL_PAYLOAD), | |
8658dca8 | 293 | }; |
1a435111 | 294 | #undef RQF_NAME |
8658dca8 | 295 | |
c0cb1c6d BVA |
296 | #define RQAF_NAME(name) [REQ_ATOM_##name] = #name |
297 | static const char *const rqaf_name[] = { | |
298 | RQAF_NAME(COMPLETE), | |
299 | RQAF_NAME(STARTED), | |
300 | RQAF_NAME(POLL_SLEPT), | |
301 | }; | |
302 | #undef RQAF_NAME | |
303 | ||
daaadb3e | 304 | int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq) |
950cd7e9 | 305 | { |
2836ee4b | 306 | const struct blk_mq_ops *const mq_ops = rq->q->mq_ops; |
8658dca8 | 307 | const unsigned int op = rq->cmd_flags & REQ_OP_MASK; |
950cd7e9 | 308 | |
8658dca8 BVA |
309 | seq_printf(m, "%p {.op=", rq); |
310 | if (op < ARRAY_SIZE(op_name) && op_name[op]) | |
311 | seq_printf(m, "%s", op_name[op]); | |
312 | else | |
313 | seq_printf(m, "%d", op); | |
314 | seq_puts(m, ", .cmd_flags="); | |
315 | blk_flags_show(m, rq->cmd_flags & ~REQ_OP_MASK, cmd_flag_name, | |
316 | ARRAY_SIZE(cmd_flag_name)); | |
317 | seq_puts(m, ", .rq_flags="); | |
318 | blk_flags_show(m, (__force unsigned int)rq->rq_flags, rqf_name, | |
319 | ARRAY_SIZE(rqf_name)); | |
c0cb1c6d BVA |
320 | seq_puts(m, ", .atomic_flags="); |
321 | blk_flags_show(m, rq->atomic_flags, rqaf_name, ARRAY_SIZE(rqaf_name)); | |
2836ee4b | 322 | seq_printf(m, ", .tag=%d, .internal_tag=%d", rq->tag, |
8658dca8 | 323 | rq->internal_tag); |
2836ee4b BVA |
324 | if (mq_ops->show_rq) |
325 | mq_ops->show_rq(m, rq); | |
326 | seq_puts(m, "}\n"); | |
950cd7e9 OS |
327 | return 0; |
328 | } | |
daaadb3e OS |
329 | EXPORT_SYMBOL_GPL(__blk_mq_debugfs_rq_show); |
330 | ||
331 | int blk_mq_debugfs_rq_show(struct seq_file *m, void *v) | |
332 | { | |
333 | return __blk_mq_debugfs_rq_show(m, list_entry_rq(v)); | |
334 | } | |
16b738f6 | 335 | EXPORT_SYMBOL_GPL(blk_mq_debugfs_rq_show); |
950cd7e9 | 336 | |
8ef1a191 BVA |
337 | static void *queue_requeue_list_start(struct seq_file *m, loff_t *pos) |
338 | __acquires(&q->requeue_lock) | |
339 | { | |
340 | struct request_queue *q = m->private; | |
341 | ||
342 | spin_lock_irq(&q->requeue_lock); | |
343 | return seq_list_start(&q->requeue_list, *pos); | |
344 | } | |
345 | ||
346 | static void *queue_requeue_list_next(struct seq_file *m, void *v, loff_t *pos) | |
347 | { | |
348 | struct request_queue *q = m->private; | |
349 | ||
350 | return seq_list_next(v, &q->requeue_list, pos); | |
351 | } | |
352 | ||
353 | static void queue_requeue_list_stop(struct seq_file *m, void *v) | |
354 | __releases(&q->requeue_lock) | |
355 | { | |
356 | struct request_queue *q = m->private; | |
357 | ||
358 | spin_unlock_irq(&q->requeue_lock); | |
359 | } | |
360 | ||
361 | static const struct seq_operations queue_requeue_list_seq_ops = { | |
362 | .start = queue_requeue_list_start, | |
363 | .next = queue_requeue_list_next, | |
364 | .stop = queue_requeue_list_stop, | |
365 | .show = blk_mq_debugfs_rq_show, | |
366 | }; | |
367 | ||
950cd7e9 | 368 | static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos) |
f3bcb0e6 | 369 | __acquires(&hctx->lock) |
950cd7e9 OS |
370 | { |
371 | struct blk_mq_hw_ctx *hctx = m->private; | |
372 | ||
373 | spin_lock(&hctx->lock); | |
374 | return seq_list_start(&hctx->dispatch, *pos); | |
375 | } | |
376 | ||
377 | static void *hctx_dispatch_next(struct seq_file *m, void *v, loff_t *pos) | |
378 | { | |
379 | struct blk_mq_hw_ctx *hctx = m->private; | |
380 | ||
381 | return seq_list_next(v, &hctx->dispatch, pos); | |
382 | } | |
383 | ||
384 | static void hctx_dispatch_stop(struct seq_file *m, void *v) | |
f3bcb0e6 | 385 | __releases(&hctx->lock) |
950cd7e9 OS |
386 | { |
387 | struct blk_mq_hw_ctx *hctx = m->private; | |
388 | ||
389 | spin_unlock(&hctx->lock); | |
390 | } | |
391 | ||
392 | static const struct seq_operations hctx_dispatch_seq_ops = { | |
393 | .start = hctx_dispatch_start, | |
394 | .next = hctx_dispatch_next, | |
395 | .stop = hctx_dispatch_stop, | |
396 | .show = blk_mq_debugfs_rq_show, | |
397 | }; | |
398 | ||
2720bab5 BVA |
399 | struct show_busy_params { |
400 | struct seq_file *m; | |
401 | struct blk_mq_hw_ctx *hctx; | |
402 | }; | |
403 | ||
404 | /* | |
405 | * Note: the state of a request may change while this function is in progress, | |
406 | * e.g. due to a concurrent blk_mq_finish_request() call. | |
407 | */ | |
408 | static void hctx_show_busy_rq(struct request *rq, void *data, bool reserved) | |
409 | { | |
410 | const struct show_busy_params *params = data; | |
411 | ||
412 | if (blk_mq_map_queue(rq->q, rq->mq_ctx->cpu) == params->hctx && | |
413 | test_bit(REQ_ATOM_STARTED, &rq->atomic_flags)) | |
414 | __blk_mq_debugfs_rq_show(params->m, | |
415 | list_entry_rq(&rq->queuelist)); | |
416 | } | |
417 | ||
418 | static int hctx_busy_show(void *data, struct seq_file *m) | |
419 | { | |
420 | struct blk_mq_hw_ctx *hctx = data; | |
421 | struct show_busy_params params = { .m = m, .hctx = hctx }; | |
422 | ||
423 | blk_mq_tagset_busy_iter(hctx->queue->tag_set, hctx_show_busy_rq, | |
424 | ¶ms); | |
425 | ||
426 | return 0; | |
427 | } | |
428 | ||
f57de23a | 429 | static int hctx_ctx_map_show(void *data, struct seq_file *m) |
0bfa5288 | 430 | { |
f57de23a | 431 | struct blk_mq_hw_ctx *hctx = data; |
0bfa5288 OS |
432 | |
433 | sbitmap_bitmap_show(&hctx->ctx_map, m); | |
434 | return 0; | |
435 | } | |
436 | ||
d96b37c0 OS |
437 | static void blk_mq_debugfs_tags_show(struct seq_file *m, |
438 | struct blk_mq_tags *tags) | |
439 | { | |
440 | seq_printf(m, "nr_tags=%u\n", tags->nr_tags); | |
441 | seq_printf(m, "nr_reserved_tags=%u\n", tags->nr_reserved_tags); | |
442 | seq_printf(m, "active_queues=%d\n", | |
443 | atomic_read(&tags->active_queues)); | |
444 | ||
445 | seq_puts(m, "\nbitmap_tags:\n"); | |
446 | sbitmap_queue_show(&tags->bitmap_tags, m); | |
447 | ||
448 | if (tags->nr_reserved_tags) { | |
449 | seq_puts(m, "\nbreserved_tags:\n"); | |
450 | sbitmap_queue_show(&tags->breserved_tags, m); | |
451 | } | |
452 | } | |
453 | ||
f57de23a | 454 | static int hctx_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 455 | { |
f57de23a | 456 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 457 | struct request_queue *q = hctx->queue; |
8c0f14ea | 458 | int res; |
d96b37c0 | 459 | |
8c0f14ea BVA |
460 | res = mutex_lock_interruptible(&q->sysfs_lock); |
461 | if (res) | |
462 | goto out; | |
d96b37c0 OS |
463 | if (hctx->tags) |
464 | blk_mq_debugfs_tags_show(m, hctx->tags); | |
465 | mutex_unlock(&q->sysfs_lock); | |
466 | ||
8c0f14ea BVA |
467 | out: |
468 | return res; | |
d96b37c0 OS |
469 | } |
470 | ||
f57de23a | 471 | static int hctx_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 472 | { |
f57de23a | 473 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 474 | struct request_queue *q = hctx->queue; |
8c0f14ea | 475 | int res; |
d7e3621a | 476 | |
8c0f14ea BVA |
477 | res = mutex_lock_interruptible(&q->sysfs_lock); |
478 | if (res) | |
479 | goto out; | |
d7e3621a OS |
480 | if (hctx->tags) |
481 | sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); | |
482 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
483 | |
484 | out: | |
485 | return res; | |
d7e3621a OS |
486 | } |
487 | ||
f57de23a | 488 | static int hctx_sched_tags_show(void *data, struct seq_file *m) |
d96b37c0 | 489 | { |
f57de23a | 490 | struct blk_mq_hw_ctx *hctx = data; |
d96b37c0 | 491 | struct request_queue *q = hctx->queue; |
8c0f14ea | 492 | int res; |
d96b37c0 | 493 | |
8c0f14ea BVA |
494 | res = mutex_lock_interruptible(&q->sysfs_lock); |
495 | if (res) | |
496 | goto out; | |
d96b37c0 OS |
497 | if (hctx->sched_tags) |
498 | blk_mq_debugfs_tags_show(m, hctx->sched_tags); | |
499 | mutex_unlock(&q->sysfs_lock); | |
500 | ||
8c0f14ea BVA |
501 | out: |
502 | return res; | |
d96b37c0 OS |
503 | } |
504 | ||
f57de23a | 505 | static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m) |
d7e3621a | 506 | { |
f57de23a | 507 | struct blk_mq_hw_ctx *hctx = data; |
d7e3621a | 508 | struct request_queue *q = hctx->queue; |
8c0f14ea | 509 | int res; |
d7e3621a | 510 | |
8c0f14ea BVA |
511 | res = mutex_lock_interruptible(&q->sysfs_lock); |
512 | if (res) | |
513 | goto out; | |
d7e3621a OS |
514 | if (hctx->sched_tags) |
515 | sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); | |
516 | mutex_unlock(&q->sysfs_lock); | |
8c0f14ea BVA |
517 | |
518 | out: | |
519 | return res; | |
d7e3621a OS |
520 | } |
521 | ||
f57de23a | 522 | static int hctx_io_poll_show(void *data, struct seq_file *m) |
be215473 | 523 | { |
f57de23a | 524 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
525 | |
526 | seq_printf(m, "considered=%lu\n", hctx->poll_considered); | |
527 | seq_printf(m, "invoked=%lu\n", hctx->poll_invoked); | |
528 | seq_printf(m, "success=%lu\n", hctx->poll_success); | |
529 | return 0; | |
530 | } | |
531 | ||
f57de23a | 532 | static ssize_t hctx_io_poll_write(void *data, const char __user *buf, |
be215473 OS |
533 | size_t count, loff_t *ppos) |
534 | { | |
f57de23a | 535 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
536 | |
537 | hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0; | |
538 | return count; | |
539 | } | |
540 | ||
f57de23a | 541 | static int hctx_dispatched_show(void *data, struct seq_file *m) |
be215473 | 542 | { |
f57de23a | 543 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
544 | int i; |
545 | ||
546 | seq_printf(m, "%8u\t%lu\n", 0U, hctx->dispatched[0]); | |
547 | ||
548 | for (i = 1; i < BLK_MQ_MAX_DISPATCH_ORDER - 1; i++) { | |
549 | unsigned int d = 1U << (i - 1); | |
550 | ||
551 | seq_printf(m, "%8u\t%lu\n", d, hctx->dispatched[i]); | |
552 | } | |
553 | ||
554 | seq_printf(m, "%8u+\t%lu\n", 1U << (i - 1), hctx->dispatched[i]); | |
555 | return 0; | |
556 | } | |
557 | ||
f57de23a | 558 | static ssize_t hctx_dispatched_write(void *data, const char __user *buf, |
be215473 OS |
559 | size_t count, loff_t *ppos) |
560 | { | |
f57de23a | 561 | struct blk_mq_hw_ctx *hctx = data; |
be215473 OS |
562 | int i; |
563 | ||
564 | for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++) | |
565 | hctx->dispatched[i] = 0; | |
566 | return count; | |
567 | } | |
568 | ||
f57de23a | 569 | static int hctx_queued_show(void *data, struct seq_file *m) |
4a46f05e | 570 | { |
f57de23a | 571 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
572 | |
573 | seq_printf(m, "%lu\n", hctx->queued); | |
574 | return 0; | |
575 | } | |
576 | ||
f57de23a | 577 | static ssize_t hctx_queued_write(void *data, const char __user *buf, |
4a46f05e OS |
578 | size_t count, loff_t *ppos) |
579 | { | |
f57de23a | 580 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
581 | |
582 | hctx->queued = 0; | |
583 | return count; | |
584 | } | |
585 | ||
f57de23a | 586 | static int hctx_run_show(void *data, struct seq_file *m) |
4a46f05e | 587 | { |
f57de23a | 588 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
589 | |
590 | seq_printf(m, "%lu\n", hctx->run); | |
591 | return 0; | |
592 | } | |
593 | ||
f57de23a OS |
594 | static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count, |
595 | loff_t *ppos) | |
4a46f05e | 596 | { |
f57de23a | 597 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
598 | |
599 | hctx->run = 0; | |
600 | return count; | |
601 | } | |
602 | ||
f57de23a | 603 | static int hctx_active_show(void *data, struct seq_file *m) |
4a46f05e | 604 | { |
f57de23a | 605 | struct blk_mq_hw_ctx *hctx = data; |
4a46f05e OS |
606 | |
607 | seq_printf(m, "%d\n", atomic_read(&hctx->nr_active)); | |
608 | return 0; | |
609 | } | |
610 | ||
950cd7e9 | 611 | static void *ctx_rq_list_start(struct seq_file *m, loff_t *pos) |
f3bcb0e6 | 612 | __acquires(&ctx->lock) |
950cd7e9 OS |
613 | { |
614 | struct blk_mq_ctx *ctx = m->private; | |
615 | ||
616 | spin_lock(&ctx->lock); | |
617 | return seq_list_start(&ctx->rq_list, *pos); | |
618 | } | |
619 | ||
620 | static void *ctx_rq_list_next(struct seq_file *m, void *v, loff_t *pos) | |
621 | { | |
622 | struct blk_mq_ctx *ctx = m->private; | |
623 | ||
624 | return seq_list_next(v, &ctx->rq_list, pos); | |
625 | } | |
626 | ||
627 | static void ctx_rq_list_stop(struct seq_file *m, void *v) | |
f3bcb0e6 | 628 | __releases(&ctx->lock) |
950cd7e9 OS |
629 | { |
630 | struct blk_mq_ctx *ctx = m->private; | |
631 | ||
632 | spin_unlock(&ctx->lock); | |
633 | } | |
634 | ||
635 | static const struct seq_operations ctx_rq_list_seq_ops = { | |
636 | .start = ctx_rq_list_start, | |
637 | .next = ctx_rq_list_next, | |
638 | .stop = ctx_rq_list_stop, | |
639 | .show = blk_mq_debugfs_rq_show, | |
640 | }; | |
f57de23a | 641 | static int ctx_dispatched_show(void *data, struct seq_file *m) |
4a46f05e | 642 | { |
f57de23a | 643 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
644 | |
645 | seq_printf(m, "%lu %lu\n", ctx->rq_dispatched[1], ctx->rq_dispatched[0]); | |
646 | return 0; | |
647 | } | |
648 | ||
f57de23a | 649 | static ssize_t ctx_dispatched_write(void *data, const char __user *buf, |
4a46f05e OS |
650 | size_t count, loff_t *ppos) |
651 | { | |
f57de23a | 652 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
653 | |
654 | ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0; | |
655 | return count; | |
656 | } | |
657 | ||
f57de23a | 658 | static int ctx_merged_show(void *data, struct seq_file *m) |
4a46f05e | 659 | { |
f57de23a | 660 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
661 | |
662 | seq_printf(m, "%lu\n", ctx->rq_merged); | |
663 | return 0; | |
664 | } | |
665 | ||
f57de23a OS |
666 | static ssize_t ctx_merged_write(void *data, const char __user *buf, |
667 | size_t count, loff_t *ppos) | |
4a46f05e | 668 | { |
f57de23a | 669 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
670 | |
671 | ctx->rq_merged = 0; | |
672 | return count; | |
673 | } | |
674 | ||
f57de23a | 675 | static int ctx_completed_show(void *data, struct seq_file *m) |
4a46f05e | 676 | { |
f57de23a | 677 | struct blk_mq_ctx *ctx = data; |
4a46f05e OS |
678 | |
679 | seq_printf(m, "%lu %lu\n", ctx->rq_completed[1], ctx->rq_completed[0]); | |
680 | return 0; | |
681 | } | |
682 | ||
f57de23a OS |
683 | static ssize_t ctx_completed_write(void *data, const char __user *buf, |
684 | size_t count, loff_t *ppos) | |
4a46f05e | 685 | { |
f57de23a OS |
686 | struct blk_mq_ctx *ctx = data; |
687 | ||
688 | ctx->rq_completed[0] = ctx->rq_completed[1] = 0; | |
689 | return count; | |
4a46f05e OS |
690 | } |
691 | ||
f57de23a OS |
692 | static int blk_mq_debugfs_show(struct seq_file *m, void *v) |
693 | { | |
694 | const struct blk_mq_debugfs_attr *attr = m->private; | |
695 | void *data = d_inode(m->file->f_path.dentry->d_parent)->i_private; | |
696 | ||
697 | return attr->show(data, m); | |
698 | } | |
699 | ||
700 | static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf, | |
701 | size_t count, loff_t *ppos) | |
4a46f05e OS |
702 | { |
703 | struct seq_file *m = file->private_data; | |
f57de23a OS |
704 | const struct blk_mq_debugfs_attr *attr = m->private; |
705 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
4a46f05e | 706 | |
f57de23a OS |
707 | if (!attr->write) |
708 | return -EPERM; | |
709 | ||
710 | return attr->write(data, buf, count, ppos); | |
711 | } | |
712 | ||
713 | static int blk_mq_debugfs_open(struct inode *inode, struct file *file) | |
714 | { | |
715 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
716 | void *data = d_inode(file->f_path.dentry->d_parent)->i_private; | |
717 | struct seq_file *m; | |
718 | int ret; | |
719 | ||
720 | if (attr->seq_ops) { | |
721 | ret = seq_open(file, attr->seq_ops); | |
722 | if (!ret) { | |
723 | m = file->private_data; | |
724 | m->private = data; | |
725 | } | |
726 | return ret; | |
727 | } | |
728 | ||
729 | if (WARN_ON_ONCE(!attr->show)) | |
730 | return -EPERM; | |
731 | ||
732 | return single_open(file, blk_mq_debugfs_show, inode->i_private); | |
4a46f05e OS |
733 | } |
734 | ||
f57de23a OS |
735 | static int blk_mq_debugfs_release(struct inode *inode, struct file *file) |
736 | { | |
737 | const struct blk_mq_debugfs_attr *attr = inode->i_private; | |
738 | ||
739 | if (attr->show) | |
740 | return single_release(inode, file); | |
741 | else | |
742 | return seq_release(inode, file); | |
743 | } | |
744 | ||
f8465933 | 745 | static const struct file_operations blk_mq_debugfs_fops = { |
f57de23a | 746 | .open = blk_mq_debugfs_open, |
4a46f05e | 747 | .read = seq_read, |
f57de23a | 748 | .write = blk_mq_debugfs_write, |
4a46f05e | 749 | .llseek = seq_lseek, |
f57de23a | 750 | .release = blk_mq_debugfs_release, |
4a46f05e OS |
751 | }; |
752 | ||
34dbad5d | 753 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = { |
f57de23a | 754 | {"poll_stat", 0400, queue_poll_stat_show}, |
8ef1a191 | 755 | {"requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops}, |
f57de23a | 756 | {"state", 0600, queue_state_show, queue_state_write}, |
f793dfd3 | 757 | {"write_hints", 0600, queue_write_hint_show, queue_write_hint_store}, |
34dbad5d OS |
758 | {}, |
759 | }; | |
760 | ||
07e4fead | 761 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { |
f57de23a OS |
762 | {"state", 0400, hctx_state_show}, |
763 | {"flags", 0400, hctx_flags_show}, | |
764 | {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops}, | |
2720bab5 | 765 | {"busy", 0400, hctx_busy_show}, |
f57de23a OS |
766 | {"ctx_map", 0400, hctx_ctx_map_show}, |
767 | {"tags", 0400, hctx_tags_show}, | |
768 | {"tags_bitmap", 0400, hctx_tags_bitmap_show}, | |
769 | {"sched_tags", 0400, hctx_sched_tags_show}, | |
770 | {"sched_tags_bitmap", 0400, hctx_sched_tags_bitmap_show}, | |
771 | {"io_poll", 0600, hctx_io_poll_show, hctx_io_poll_write}, | |
772 | {"dispatched", 0600, hctx_dispatched_show, hctx_dispatched_write}, | |
773 | {"queued", 0600, hctx_queued_show, hctx_queued_write}, | |
774 | {"run", 0600, hctx_run_show, hctx_run_write}, | |
775 | {"active", 0400, hctx_active_show}, | |
72f2f8f6 | 776 | {}, |
07e4fead OS |
777 | }; |
778 | ||
779 | static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { | |
f57de23a OS |
780 | {"rq_list", 0400, .seq_ops = &ctx_rq_list_seq_ops}, |
781 | {"dispatched", 0600, ctx_dispatched_show, ctx_dispatched_write}, | |
782 | {"merged", 0600, ctx_merged_show, ctx_merged_write}, | |
783 | {"completed", 0600, ctx_completed_show, ctx_completed_write}, | |
72f2f8f6 | 784 | {}, |
07e4fead OS |
785 | }; |
786 | ||
9c1051aa OS |
787 | static bool debugfs_create_files(struct dentry *parent, void *data, |
788 | const struct blk_mq_debugfs_attr *attr) | |
789 | { | |
790 | d_inode(parent)->i_private = data; | |
791 | ||
792 | for (; attr->name; attr++) { | |
793 | if (!debugfs_create_file(attr->name, attr->mode, parent, | |
794 | (void *)attr, &blk_mq_debugfs_fops)) | |
795 | return false; | |
796 | } | |
797 | return true; | |
798 | } | |
799 | ||
4c9e4019 | 800 | int blk_mq_debugfs_register(struct request_queue *q) |
07e4fead | 801 | { |
9c1051aa OS |
802 | struct blk_mq_hw_ctx *hctx; |
803 | int i; | |
804 | ||
18fbda91 | 805 | if (!blk_debugfs_root) |
07e4fead OS |
806 | return -ENOENT; |
807 | ||
4c9e4019 BVA |
808 | q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent), |
809 | blk_debugfs_root); | |
07e4fead | 810 | if (!q->debugfs_dir) |
9c1051aa | 811 | return -ENOMEM; |
07e4fead | 812 | |
9c1051aa OS |
813 | if (!debugfs_create_files(q->debugfs_dir, q, |
814 | blk_mq_debugfs_queue_attrs)) | |
07e4fead OS |
815 | goto err; |
816 | ||
9c1051aa OS |
817 | /* |
818 | * blk_mq_init_hctx() attempted to do this already, but q->debugfs_dir | |
819 | * didn't exist yet (because we don't know what to name the directory | |
820 | * until the queue is registered to a gendisk). | |
821 | */ | |
822 | queue_for_each_hw_ctx(q, hctx, i) { | |
823 | if (!hctx->debugfs_dir && blk_mq_debugfs_register_hctx(q, hctx)) | |
824 | goto err; | |
d332ce09 OS |
825 | if (q->elevator && !hctx->sched_debugfs_dir && |
826 | blk_mq_debugfs_register_sched_hctx(q, hctx)) | |
827 | goto err; | |
9c1051aa OS |
828 | } |
829 | ||
07e4fead OS |
830 | return 0; |
831 | ||
832 | err: | |
833 | blk_mq_debugfs_unregister(q); | |
834 | return -ENOMEM; | |
835 | } | |
836 | ||
837 | void blk_mq_debugfs_unregister(struct request_queue *q) | |
838 | { | |
839 | debugfs_remove_recursive(q->debugfs_dir); | |
d332ce09 | 840 | q->sched_debugfs_dir = NULL; |
07e4fead OS |
841 | q->debugfs_dir = NULL; |
842 | } | |
843 | ||
9c1051aa OS |
844 | static int blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx, |
845 | struct blk_mq_ctx *ctx) | |
07e4fead OS |
846 | { |
847 | struct dentry *ctx_dir; | |
848 | char name[20]; | |
07e4fead OS |
849 | |
850 | snprintf(name, sizeof(name), "cpu%u", ctx->cpu); | |
9c1051aa | 851 | ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir); |
07e4fead OS |
852 | if (!ctx_dir) |
853 | return -ENOMEM; | |
854 | ||
72f2f8f6 BVA |
855 | if (!debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs)) |
856 | return -ENOMEM; | |
07e4fead OS |
857 | |
858 | return 0; | |
859 | } | |
860 | ||
9c1051aa OS |
861 | int blk_mq_debugfs_register_hctx(struct request_queue *q, |
862 | struct blk_mq_hw_ctx *hctx) | |
07e4fead OS |
863 | { |
864 | struct blk_mq_ctx *ctx; | |
07e4fead OS |
865 | char name[20]; |
866 | int i; | |
867 | ||
9c1051aa OS |
868 | if (!q->debugfs_dir) |
869 | return -ENOENT; | |
870 | ||
88aabbd7 | 871 | snprintf(name, sizeof(name), "hctx%u", hctx->queue_num); |
9c1051aa OS |
872 | hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir); |
873 | if (!hctx->debugfs_dir) | |
07e4fead OS |
874 | return -ENOMEM; |
875 | ||
9c1051aa OS |
876 | if (!debugfs_create_files(hctx->debugfs_dir, hctx, |
877 | blk_mq_debugfs_hctx_attrs)) | |
878 | goto err; | |
07e4fead OS |
879 | |
880 | hctx_for_each_ctx(hctx, ctx, i) { | |
9c1051aa OS |
881 | if (blk_mq_debugfs_register_ctx(hctx, ctx)) |
882 | goto err; | |
07e4fead OS |
883 | } |
884 | ||
885 | return 0; | |
9c1051aa OS |
886 | |
887 | err: | |
888 | blk_mq_debugfs_unregister_hctx(hctx); | |
889 | return -ENOMEM; | |
890 | } | |
891 | ||
892 | void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx) | |
893 | { | |
894 | debugfs_remove_recursive(hctx->debugfs_dir); | |
d332ce09 | 895 | hctx->sched_debugfs_dir = NULL; |
9c1051aa | 896 | hctx->debugfs_dir = NULL; |
07e4fead OS |
897 | } |
898 | ||
9c1051aa | 899 | int blk_mq_debugfs_register_hctxs(struct request_queue *q) |
07e4fead OS |
900 | { |
901 | struct blk_mq_hw_ctx *hctx; | |
902 | int i; | |
903 | ||
07e4fead OS |
904 | queue_for_each_hw_ctx(q, hctx, i) { |
905 | if (blk_mq_debugfs_register_hctx(q, hctx)) | |
9c1051aa | 906 | return -ENOMEM; |
07e4fead OS |
907 | } |
908 | ||
909 | return 0; | |
07e4fead OS |
910 | } |
911 | ||
9c1051aa | 912 | void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) |
07e4fead | 913 | { |
9c1051aa OS |
914 | struct blk_mq_hw_ctx *hctx; |
915 | int i; | |
916 | ||
917 | queue_for_each_hw_ctx(q, hctx, i) | |
918 | blk_mq_debugfs_unregister_hctx(hctx); | |
07e4fead | 919 | } |
d332ce09 OS |
920 | |
921 | int blk_mq_debugfs_register_sched(struct request_queue *q) | |
922 | { | |
923 | struct elevator_type *e = q->elevator->type; | |
924 | ||
925 | if (!q->debugfs_dir) | |
926 | return -ENOENT; | |
927 | ||
928 | if (!e->queue_debugfs_attrs) | |
929 | return 0; | |
930 | ||
931 | q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir); | |
932 | if (!q->sched_debugfs_dir) | |
933 | return -ENOMEM; | |
934 | ||
935 | if (!debugfs_create_files(q->sched_debugfs_dir, q, | |
936 | e->queue_debugfs_attrs)) | |
937 | goto err; | |
938 | ||
939 | return 0; | |
940 | ||
941 | err: | |
942 | blk_mq_debugfs_unregister_sched(q); | |
943 | return -ENOMEM; | |
944 | } | |
945 | ||
946 | void blk_mq_debugfs_unregister_sched(struct request_queue *q) | |
947 | { | |
948 | debugfs_remove_recursive(q->sched_debugfs_dir); | |
949 | q->sched_debugfs_dir = NULL; | |
950 | } | |
951 | ||
952 | int blk_mq_debugfs_register_sched_hctx(struct request_queue *q, | |
953 | struct blk_mq_hw_ctx *hctx) | |
954 | { | |
955 | struct elevator_type *e = q->elevator->type; | |
956 | ||
957 | if (!hctx->debugfs_dir) | |
958 | return -ENOENT; | |
959 | ||
960 | if (!e->hctx_debugfs_attrs) | |
961 | return 0; | |
962 | ||
963 | hctx->sched_debugfs_dir = debugfs_create_dir("sched", | |
964 | hctx->debugfs_dir); | |
965 | if (!hctx->sched_debugfs_dir) | |
966 | return -ENOMEM; | |
967 | ||
968 | if (!debugfs_create_files(hctx->sched_debugfs_dir, hctx, | |
969 | e->hctx_debugfs_attrs)) | |
970 | return -ENOMEM; | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
975 | void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx) | |
976 | { | |
977 | debugfs_remove_recursive(hctx->sched_debugfs_dir); | |
978 | hctx->sched_debugfs_dir = NULL; | |
979 | } |