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