1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/kernel.h>
3 #include <linux/errno.h>
4 #include <linux/file.h>
5 #include <linux/io_uring.h>
6
7 #include <trace/events/io_uring.h>
8
9 #include <uapi/linux/io_uring.h>
10
11 #include "io_uring.h"
12 #include "refs.h"
13 #include "cancel.h"
14 #include "timeout.h"
15
16 struct io_timeout {
17 struct file *file;
18 u32 off;
19 u32 target_seq;
20 u32 repeats;
21 struct list_head list;
22 /* head of the link, used by linked timeouts only */
23 struct io_kiocb *head;
24 /* for linked completions */
25 struct io_kiocb *prev;
26 };
27
28 struct io_timeout_rem {
29 struct file *file;
30 u64 addr;
31
32 /* timeout update */
33 struct timespec64 ts;
34 u32 flags;
35 bool ltimeout;
36 };
37
38 static inline bool io_is_timeout_noseq(struct io_kiocb *req)
39 {
40 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
41 struct io_timeout_data *data = req->async_data;
42
43 return !timeout->off || data->flags & IORING_TIMEOUT_MULTISHOT;
44 }
45
46 static inline void io_put_req(struct io_kiocb *req)
47 {
48 if (req_ref_put_and_test(req)) {
49 io_queue_next(req);
50 io_free_req(req);
51 }
52 }
53
54 static inline bool io_timeout_finish(struct io_timeout *timeout,
55 struct io_timeout_data *data)
56 {
57 if (!(data->flags & IORING_TIMEOUT_MULTISHOT))
58 return true;
59
60 if (!timeout->off || (timeout->repeats && --timeout->repeats))
61 return false;
62
63 return true;
64 }
65
66 static enum hrtimer_restart io_timeout_fn(struct hrtimer *timer);
67
68 static void io_timeout_complete(struct io_kiocb *req, struct io_tw_state *ts)
69 {
70 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
71 struct io_timeout_data *data = req->async_data;
72 struct io_ring_ctx *ctx = req->ctx;
73
74 if (!io_timeout_finish(timeout, data)) {
75 if (io_req_post_cqe(req, -ETIME, IORING_CQE_F_MORE)) {
76 /* re-arm timer */
77 spin_lock_irq(&ctx->timeout_lock);
78 list_add(&timeout->list, ctx->timeout_list.prev);
79 data->timer.function = io_timeout_fn;
80 hrtimer_start(&data->timer, timespec64_to_ktime(data->ts), data->mode);
81 spin_unlock_irq(&ctx->timeout_lock);
82 return;
83 }
84 }
85
86 io_req_task_complete(req, ts);
87 }
88
89 static bool io_kill_timeout(struct io_kiocb *req, int status)
90 __must_hold(&req->ctx->timeout_lock)
91 {
92 struct io_timeout_data *io = req->async_data;
93
94 if (hrtimer_try_to_cancel(&io->timer) != -1) {
95 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
96
97 if (status)
98 req_set_fail(req);
99 atomic_set(&req->ctx->cq_timeouts,
100 atomic_read(&req->ctx->cq_timeouts) + 1);
101 list_del_init(&timeout->list);
102 io_req_queue_tw_complete(req, status);
103 return true;
104 }
105 return false;
106 }
107
108 __cold void io_flush_timeouts(struct io_ring_ctx *ctx)
109 {
110 u32 seq;
111 struct io_timeout *timeout, *tmp;
112
113 spin_lock_irq(&ctx->timeout_lock);
114 seq = ctx->cached_cq_tail - atomic_read(&ctx->cq_timeouts);
115
116 list_for_each_entry_safe(timeout, tmp, &ctx->timeout_list, list) {
117 struct io_kiocb *req = cmd_to_io_kiocb(timeout);
118 u32 events_needed, events_got;
119
120 if (io_is_timeout_noseq(req))
121 break;
122
123 /*
124 * Since seq can easily wrap around over time, subtract
125 * the last seq at which timeouts were flushed before comparing.
126 * Assuming not more than 2^31-1 events have happened since,
127 * these subtractions won't have wrapped, so we can check if
128 * target is in [last_seq, current_seq] by comparing the two.
129 */
130 events_needed = timeout->target_seq - ctx->cq_last_tm_flush;
131 events_got = seq - ctx->cq_last_tm_flush;
132 if (events_got < events_needed)
133 break;
134
135 io_kill_timeout(req, 0);
136 }
137 ctx->cq_last_tm_flush = seq;
138 spin_unlock_irq(&ctx->timeout_lock);
139 }
140
141 static void io_req_tw_fail_links(struct io_kiocb *link, struct io_tw_state *ts)
142 {
143 io_tw_lock(link->ctx, ts);
144 while (link) {
145 struct io_kiocb *nxt = link->link;
146 long res = -ECANCELED;
147
148 if (link->flags & REQ_F_FAIL)
149 res = link->cqe.res;
150 link->link = NULL;
151 io_req_set_res(link, res, 0);
152 io_req_task_complete(link, ts);
153 link = nxt;
154 }
155 }
156
157 static void io_fail_links(struct io_kiocb *req)
158 __must_hold(&req->ctx->completion_lock)
159 {
160 struct io_kiocb *link = req->link;
161 bool ignore_cqes = req->flags & REQ_F_SKIP_LINK_CQES;
162
163 if (!link)
164 return;
165
166 while (link) {
167 if (ignore_cqes)
168 link->flags |= REQ_F_CQE_SKIP;
169 else
170 link->flags &= ~REQ_F_CQE_SKIP;
171 trace_io_uring_fail_link(req, link);
172 link = link->link;
173 }
174
175 link = req->link;
176 link->io_task_work.func = io_req_tw_fail_links;
177 io_req_task_work_add(link);
178 req->link = NULL;
179 }
180
181 static inline void io_remove_next_linked(struct io_kiocb *req)
182 {
183 struct io_kiocb *nxt = req->link;
184
185 req->link = nxt->link;
186 nxt->link = NULL;
187 }
188
189 void io_disarm_next(struct io_kiocb *req)
190 __must_hold(&req->ctx->completion_lock)
191 {
192 struct io_kiocb *link = NULL;
193
194 if (req->flags & REQ_F_ARM_LTIMEOUT) {
195 link = req->link;
196 req->flags &= ~REQ_F_ARM_LTIMEOUT;
197 if (link && link->opcode == IORING_OP_LINK_TIMEOUT) {
198 io_remove_next_linked(req);
199 io_req_queue_tw_complete(link, -ECANCELED);
200 }
201 } else if (req->flags & REQ_F_LINK_TIMEOUT) {
202 struct io_ring_ctx *ctx = req->ctx;
203
204 spin_lock_irq(&ctx->timeout_lock);
205 link = io_disarm_linked_timeout(req);
206 spin_unlock_irq(&ctx->timeout_lock);
207 if (link)
208 io_req_queue_tw_complete(link, -ECANCELED);
209 }
210 if (unlikely((req->flags & REQ_F_FAIL) &&
211 !(req->flags & REQ_F_HARDLINK)))
212 io_fail_links(req);
213 }
214
215 struct io_kiocb *__io_disarm_linked_timeout(struct io_kiocb *req,
216 struct io_kiocb *link)
217 __must_hold(&req->ctx->completion_lock)
218 __must_hold(&req->ctx->timeout_lock)
219 {
220 struct io_timeout_data *io = link->async_data;
221 struct io_timeout *timeout = io_kiocb_to_cmd(link, struct io_timeout);
222
223 io_remove_next_linked(req);
224 timeout->head = NULL;
225 if (hrtimer_try_to_cancel(&io->timer) != -1) {
226 list_del(&timeout->list);
227 return link;
228 }
229
230 return NULL;
231 }
232
233 static enum hrtimer_restart io_timeout_fn(struct hrtimer *timer)
234 {
235 struct io_timeout_data *data = container_of(timer,
236 struct io_timeout_data, timer);
237 struct io_kiocb *req = data->req;
238 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
239 struct io_ring_ctx *ctx = req->ctx;
240 unsigned long flags;
241
242 spin_lock_irqsave(&ctx->timeout_lock, flags);
243 list_del_init(&timeout->list);
244 atomic_set(&req->ctx->cq_timeouts,
245 atomic_read(&req->ctx->cq_timeouts) + 1);
246 spin_unlock_irqrestore(&ctx->timeout_lock, flags);
247
248 if (!(data->flags & IORING_TIMEOUT_ETIME_SUCCESS))
249 req_set_fail(req);
250
251 io_req_set_res(req, -ETIME, 0);
252 req->io_task_work.func = io_timeout_complete;
253 io_req_task_work_add(req);
254 return HRTIMER_NORESTART;
255 }
256
257 static struct io_kiocb *io_timeout_extract(struct io_ring_ctx *ctx,
258 struct io_cancel_data *cd)
259 __must_hold(&ctx->timeout_lock)
260 {
261 struct io_timeout *timeout;
262 struct io_timeout_data *io;
263 struct io_kiocb *req = NULL;
264
265 list_for_each_entry(timeout, &ctx->timeout_list, list) {
266 struct io_kiocb *tmp = cmd_to_io_kiocb(timeout);
267
268 if (io_cancel_req_match(tmp, cd)) {
269 req = tmp;
270 break;
271 }
272 }
273 if (!req)
274 return ERR_PTR(-ENOENT);
275
276 io = req->async_data;
277 if (hrtimer_try_to_cancel(&io->timer) == -1)
278 return ERR_PTR(-EALREADY);
279 timeout = io_kiocb_to_cmd(req, struct io_timeout);
280 list_del_init(&timeout->list);
281 return req;
282 }
283
284 int io_timeout_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd)
285 __must_hold(&ctx->completion_lock)
286 {
287 struct io_kiocb *req;
288
289 spin_lock_irq(&ctx->timeout_lock);
290 req = io_timeout_extract(ctx, cd);
291 spin_unlock_irq(&ctx->timeout_lock);
292
293 if (IS_ERR(req))
294 return PTR_ERR(req);
295 io_req_task_queue_fail(req, -ECANCELED);
296 return 0;
297 }
298
299 static void io_req_task_link_timeout(struct io_kiocb *req, struct io_tw_state *ts)
300 {
301 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
302 struct io_kiocb *prev = timeout->prev;
303 int ret = -ENOENT;
304
305 if (prev) {
306 if (!(req->task->flags & PF_EXITING)) {
307 struct io_cancel_data cd = {
308 .ctx = req->ctx,
309 .data = prev->cqe.user_data,
310 };
311
312 ret = io_try_cancel(req->task->io_uring, &cd, 0);
313 }
314 io_req_set_res(req, ret ?: -ETIME, 0);
315 io_req_task_complete(req, ts);
316 io_put_req(prev);
317 } else {
318 io_req_set_res(req, -ETIME, 0);
319 io_req_task_complete(req, ts);
320 }
321 }
322
323 static enum hrtimer_restart io_link_timeout_fn(struct hrtimer *timer)
324 {
325 struct io_timeout_data *data = container_of(timer,
326 struct io_timeout_data, timer);
327 struct io_kiocb *prev, *req = data->req;
328 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
329 struct io_ring_ctx *ctx = req->ctx;
330 unsigned long flags;
331
332 spin_lock_irqsave(&ctx->timeout_lock, flags);
333 prev = timeout->head;
334 timeout->head = NULL;
335
336 /*
337 * We don't expect the list to be empty, that will only happen if we
338 * race with the completion of the linked work.
339 */
340 if (prev) {
341 io_remove_next_linked(prev);
342 if (!req_ref_inc_not_zero(prev))
343 prev = NULL;
344 }
345 list_del(&timeout->list);
346 timeout->prev = prev;
347 spin_unlock_irqrestore(&ctx->timeout_lock, flags);
348
349 req->io_task_work.func = io_req_task_link_timeout;
350 io_req_task_work_add(req);
351 return HRTIMER_NORESTART;
352 }
353
354 static clockid_t io_timeout_get_clock(struct io_timeout_data *data)
355 {
356 switch (data->flags & IORING_TIMEOUT_CLOCK_MASK) {
357 case IORING_TIMEOUT_BOOTTIME:
358 return CLOCK_BOOTTIME;
359 case IORING_TIMEOUT_REALTIME:
360 return CLOCK_REALTIME;
361 default:
362 /* can't happen, vetted at prep time */
363 WARN_ON_ONCE(1);
364 fallthrough;
365 case 0:
366 return CLOCK_MONOTONIC;
367 }
368 }
369
370 static int io_linked_timeout_update(struct io_ring_ctx *ctx, __u64 user_data,
371 struct timespec64 *ts, enum hrtimer_mode mode)
372 __must_hold(&ctx->timeout_lock)
373 {
374 struct io_timeout_data *io;
375 struct io_timeout *timeout;
376 struct io_kiocb *req = NULL;
377
378 list_for_each_entry(timeout, &ctx->ltimeout_list, list) {
379 struct io_kiocb *tmp = cmd_to_io_kiocb(timeout);
380
381 if (user_data == tmp->cqe.user_data) {
382 req = tmp;
383 break;
384 }
385 }
386 if (!req)
387 return -ENOENT;
388
389 io = req->async_data;
390 if (hrtimer_try_to_cancel(&io->timer) == -1)
391 return -EALREADY;
392 hrtimer_init(&io->timer, io_timeout_get_clock(io), mode);
393 io->timer.function = io_link_timeout_fn;
394 hrtimer_start(&io->timer, timespec64_to_ktime(*ts), mode);
395 return 0;
396 }
397
398 static int io_timeout_update(struct io_ring_ctx *ctx, __u64 user_data,
399 struct timespec64 *ts, enum hrtimer_mode mode)
400 __must_hold(&ctx->timeout_lock)
401 {
402 struct io_cancel_data cd = { .ctx = ctx, .data = user_data, };
403 struct io_kiocb *req = io_timeout_extract(ctx, &cd);
404 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
405 struct io_timeout_data *data;
406
407 if (IS_ERR(req))
408 return PTR_ERR(req);
409
410 timeout->off = 0; /* noseq */
411 data = req->async_data;
412 list_add_tail(&timeout->list, &ctx->timeout_list);
413 hrtimer_init(&data->timer, io_timeout_get_clock(data), mode);
414 data->timer.function = io_timeout_fn;
415 hrtimer_start(&data->timer, timespec64_to_ktime(*ts), mode);
416 return 0;
417 }
418
419 int io_timeout_remove_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
420 {
421 struct io_timeout_rem *tr = io_kiocb_to_cmd(req, struct io_timeout_rem);
422
423 if (unlikely(req->flags & (REQ_F_FIXED_FILE | REQ_F_BUFFER_SELECT)))
424 return -EINVAL;
425 if (sqe->buf_index || sqe->len || sqe->splice_fd_in)
426 return -EINVAL;
427
428 tr->ltimeout = false;
429 tr->addr = READ_ONCE(sqe->addr);
430 tr->flags = READ_ONCE(sqe->timeout_flags);
431 if (tr->flags & IORING_TIMEOUT_UPDATE_MASK) {
432 if (hweight32(tr->flags & IORING_TIMEOUT_CLOCK_MASK) > 1)
433 return -EINVAL;
434 if (tr->flags & IORING_LINK_TIMEOUT_UPDATE)
435 tr->ltimeout = true;
436 if (tr->flags & ~(IORING_TIMEOUT_UPDATE_MASK|IORING_TIMEOUT_ABS))
437 return -EINVAL;
438 if (get_timespec64(&tr->ts, u64_to_user_ptr(sqe->addr2)))
439 return -EFAULT;
440 if (tr->ts.tv_sec < 0 || tr->ts.tv_nsec < 0)
441 return -EINVAL;
442 } else if (tr->flags) {
443 /* timeout removal doesn't support flags */
444 return -EINVAL;
445 }
446
447 return 0;
448 }
449
450 static inline enum hrtimer_mode io_translate_timeout_mode(unsigned int flags)
451 {
452 return (flags & IORING_TIMEOUT_ABS) ? HRTIMER_MODE_ABS
453 : HRTIMER_MODE_REL;
454 }
455
456 /*
457 * Remove or update an existing timeout command
458 */
459 int io_timeout_remove(struct io_kiocb *req, unsigned int issue_flags)
460 {
461 struct io_timeout_rem *tr = io_kiocb_to_cmd(req, struct io_timeout_rem);
462 struct io_ring_ctx *ctx = req->ctx;
463 int ret;
464
465 if (!(tr->flags & IORING_TIMEOUT_UPDATE)) {
466 struct io_cancel_data cd = { .ctx = ctx, .data = tr->addr, };
467
468 spin_lock(&ctx->completion_lock);
469 ret = io_timeout_cancel(ctx, &cd);
470 spin_unlock(&ctx->completion_lock);
471 } else {
472 enum hrtimer_mode mode = io_translate_timeout_mode(tr->flags);
473
474 spin_lock_irq(&ctx->timeout_lock);
475 if (tr->ltimeout)
476 ret = io_linked_timeout_update(ctx, tr->addr, &tr->ts, mode);
477 else
478 ret = io_timeout_update(ctx, tr->addr, &tr->ts, mode);
479 spin_unlock_irq(&ctx->timeout_lock);
480 }
481
482 if (ret < 0)
483 req_set_fail(req);
484 io_req_set_res(req, ret, 0);
485 return IOU_OK;
486 }
487
488 static int __io_timeout_prep(struct io_kiocb *req,
489 const struct io_uring_sqe *sqe,
490 bool is_timeout_link)
491 {
492 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
493 struct io_timeout_data *data;
494 unsigned flags;
495 u32 off = READ_ONCE(sqe->off);
496
497 if (sqe->buf_index || sqe->len != 1 || sqe->splice_fd_in)
498 return -EINVAL;
499 if (off && is_timeout_link)
500 return -EINVAL;
501 flags = READ_ONCE(sqe->timeout_flags);
502 if (flags & ~(IORING_TIMEOUT_ABS | IORING_TIMEOUT_CLOCK_MASK |
503 IORING_TIMEOUT_ETIME_SUCCESS |
504 IORING_TIMEOUT_MULTISHOT))
505 return -EINVAL;
506 /* more than one clock specified is invalid, obviously */
507 if (hweight32(flags & IORING_TIMEOUT_CLOCK_MASK) > 1)
508 return -EINVAL;
509 /* multishot requests only make sense with rel values */
510 if (!(~flags & (IORING_TIMEOUT_MULTISHOT | IORING_TIMEOUT_ABS)))
511 return -EINVAL;
512
513 INIT_LIST_HEAD(&timeout->list);
514 timeout->off = off;
515 if (unlikely(off && !req->ctx->off_timeout_used))
516 req->ctx->off_timeout_used = true;
517 /*
518 * for multishot reqs w/ fixed nr of repeats, repeats tracks the
519 * remaining nr
520 */
521 timeout->repeats = 0;
522 if ((flags & IORING_TIMEOUT_MULTISHOT) && off > 0)
523 timeout->repeats = off;
524
525 if (WARN_ON_ONCE(req_has_async_data(req)))
526 return -EFAULT;
527 if (io_alloc_async_data(req))
528 return -ENOMEM;
529
530 data = req->async_data;
531 data->req = req;
532 data->flags = flags;
533
534 if (get_timespec64(&data->ts, u64_to_user_ptr(sqe->addr)))
535 return -EFAULT;
536
537 if (data->ts.tv_sec < 0 || data->ts.tv_nsec < 0)
538 return -EINVAL;
539
540 data->mode = io_translate_timeout_mode(flags);
541 hrtimer_init(&data->timer, io_timeout_get_clock(data), data->mode);
542
543 if (is_timeout_link) {
544 struct io_submit_link *link = &req->ctx->submit_state.link;
545
546 if (!link->head)
547 return -EINVAL;
548 if (link->last->opcode == IORING_OP_LINK_TIMEOUT)
549 return -EINVAL;
550 timeout->head = link->last;
551 link->last->flags |= REQ_F_ARM_LTIMEOUT;
552 }
553 return 0;
554 }
555
556 int io_timeout_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
557 {
558 return __io_timeout_prep(req, sqe, false);
559 }
560
561 int io_link_timeout_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
562 {
563 return __io_timeout_prep(req, sqe, true);
564 }
565
566 int io_timeout(struct io_kiocb *req, unsigned int issue_flags)
567 {
568 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
569 struct io_ring_ctx *ctx = req->ctx;
570 struct io_timeout_data *data = req->async_data;
571 struct list_head *entry;
572 u32 tail, off = timeout->off;
573
574 spin_lock_irq(&ctx->timeout_lock);
575
576 /*
577 * sqe->off holds how many events that need to occur for this
578 * timeout event to be satisfied. If it isn't set, then this is
579 * a pure timeout request, sequence isn't used.
580 */
581 if (io_is_timeout_noseq(req)) {
582 entry = ctx->timeout_list.prev;
583 goto add;
584 }
585
586 tail = data_race(ctx->cached_cq_tail) - atomic_read(&ctx->cq_timeouts);
587 timeout->target_seq = tail + off;
588
589 /* Update the last seq here in case io_flush_timeouts() hasn't.
590 * This is safe because ->completion_lock is held, and submissions
591 * and completions are never mixed in the same ->completion_lock section.
592 */
593 ctx->cq_last_tm_flush = tail;
594
595 /*
596 * Insertion sort, ensuring the first entry in the list is always
597 * the one we need first.
598 */
599 list_for_each_prev(entry, &ctx->timeout_list) {
600 struct io_timeout *nextt = list_entry(entry, struct io_timeout, list);
601 struct io_kiocb *nxt = cmd_to_io_kiocb(nextt);
602
603 if (io_is_timeout_noseq(nxt))
604 continue;
605 /* nxt.seq is behind @tail, otherwise would've been completed */
606 if (off >= nextt->target_seq - tail)
607 break;
608 }
609 add:
610 list_add(&timeout->list, entry);
611 data->timer.function = io_timeout_fn;
612 hrtimer_start(&data->timer, timespec64_to_ktime(data->ts), data->mode);
613 spin_unlock_irq(&ctx->timeout_lock);
614 return IOU_ISSUE_SKIP_COMPLETE;
615 }
616
617 void io_queue_linked_timeout(struct io_kiocb *req)
618 {
619 struct io_timeout *timeout = io_kiocb_to_cmd(req, struct io_timeout);
620 struct io_ring_ctx *ctx = req->ctx;
621
622 spin_lock_irq(&ctx->timeout_lock);
623 /*
624 * If the back reference is NULL, then our linked request finished
625 * before we got a chance to setup the timer
626 */
627 if (timeout->head) {
628 struct io_timeout_data *data = req->async_data;
629
630 data->timer.function = io_link_timeout_fn;
631 hrtimer_start(&data->timer, timespec64_to_ktime(data->ts),
632 data->mode);
633 list_add_tail(&timeout->list, &ctx->ltimeout_list);
634 }
635 spin_unlock_irq(&ctx->timeout_lock);
636 /* drop submission reference */
637 io_put_req(req);
638 }
639
640 static bool io_match_task(struct io_kiocb *head, struct task_struct *task,
641 bool cancel_all)
642 __must_hold(&head->ctx->timeout_lock)
643 {
644 struct io_kiocb *req;
645
646 if (task && head->task != task)
647 return false;
648 if (cancel_all)
649 return true;
650
651 io_for_each_link(req, head) {
652 if (req->flags & REQ_F_INFLIGHT)
653 return true;
654 }
655 return false;
656 }
657
658 /* Returns true if we found and killed one or more timeouts */
659 __cold bool io_kill_timeouts(struct io_ring_ctx *ctx, struct task_struct *tsk,
660 bool cancel_all)
661 {
662 struct io_timeout *timeout, *tmp;
663 int canceled = 0;
664
665 /*
666 * completion_lock is needed for io_match_task(). Take it before
667 * timeout_lockfirst to keep locking ordering.
668 */
669 spin_lock(&ctx->completion_lock);
670 spin_lock_irq(&ctx->timeout_lock);
671 list_for_each_entry_safe(timeout, tmp, &ctx->timeout_list, list) {
672 struct io_kiocb *req = cmd_to_io_kiocb(timeout);
673
674 if (io_match_task(req, tsk, cancel_all) &&
675 io_kill_timeout(req, -ECANCELED))
676 canceled++;
677 }
678 spin_unlock_irq(&ctx->timeout_lock);
679 spin_unlock(&ctx->completion_lock);
680 return canceled != 0;
681 }
682
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