blk-mq: don't count completed flush data request as inflight in case of quiesce
[linux-block.git] / fs / timerfd.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
b215e283
DL
2/*
3 * fs/timerfd.c
4 *
5 * Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
6 *
7 *
8 * Thanks to Thomas Gleixner for code reviews and useful comments.
9 *
10 */
11
11ffa9d6 12#include <linux/alarmtimer.h>
b215e283
DL
13#include <linux/file.h>
14#include <linux/poll.h>
15#include <linux/init.h>
16#include <linux/fs.h>
17#include <linux/sched.h>
18#include <linux/kernel.h>
5a0e3ad6 19#include <linux/slab.h>
b215e283
DL
20#include <linux/list.h>
21#include <linux/spinlock.h>
22#include <linux/time.h>
23#include <linux/hrtimer.h>
24#include <linux/anon_inodes.h>
25#include <linux/timerfd.h>
45cc2b96 26#include <linux/syscalls.h>
9d94b9e2 27#include <linux/compat.h>
9ec26907 28#include <linux/rcupdate.h>
6cd889d4 29#include <linux/time_namespace.h>
b215e283
DL
30
31struct timerfd_ctx {
11ffa9d6
TP
32 union {
33 struct hrtimer tmr;
34 struct alarm alarm;
35 } t;
b215e283 36 ktime_t tintv;
99ee5315 37 ktime_t moffs;
b215e283 38 wait_queue_head_t wqh;
4d672e7a 39 u64 ticks;
4d672e7a 40 int clockid;
af9c4957
CG
41 short unsigned expired;
42 short unsigned settime_flags; /* to show in fdinfo */
9ec26907
TG
43 struct rcu_head rcu;
44 struct list_head clist;
1e38da30 45 spinlock_t cancel_lock;
99ee5315 46 bool might_cancel;
b215e283
DL
47};
48
9ec26907
TG
49static LIST_HEAD(cancel_list);
50static DEFINE_SPINLOCK(cancel_lock);
51
11ffa9d6
TP
52static inline bool isalarm(struct timerfd_ctx *ctx)
53{
54 return ctx->clockid == CLOCK_REALTIME_ALARM ||
55 ctx->clockid == CLOCK_BOOTTIME_ALARM;
56}
57
b215e283
DL
58/*
59 * This gets called when the timer event triggers. We set the "expired"
60 * flag, but we do not re-arm the timer (in case it's necessary,
2456e855 61 * tintv != 0) until the timer is accessed.
b215e283 62 */
11ffa9d6 63static void timerfd_triggered(struct timerfd_ctx *ctx)
b215e283 64{
b215e283
DL
65 unsigned long flags;
66
18963c01 67 spin_lock_irqsave(&ctx->wqh.lock, flags);
b215e283 68 ctx->expired = 1;
4d672e7a 69 ctx->ticks++;
7dda7128 70 wake_up_locked_poll(&ctx->wqh, EPOLLIN);
18963c01 71 spin_unlock_irqrestore(&ctx->wqh.lock, flags);
11ffa9d6 72}
b215e283 73
11ffa9d6
TP
74static enum hrtimer_restart timerfd_tmrproc(struct hrtimer *htmr)
75{
76 struct timerfd_ctx *ctx = container_of(htmr, struct timerfd_ctx,
77 t.tmr);
78 timerfd_triggered(ctx);
b215e283
DL
79 return HRTIMER_NORESTART;
80}
81
11ffa9d6
TP
82static enum alarmtimer_restart timerfd_alarmproc(struct alarm *alarm,
83 ktime_t now)
84{
85 struct timerfd_ctx *ctx = container_of(alarm, struct timerfd_ctx,
86 t.alarm);
87 timerfd_triggered(ctx);
88 return ALARMTIMER_NORESTART;
89}
90
9ec26907
TG
91/*
92 * Called when the clock was set to cancel the timers in the cancel
1123d939
MA
93 * list. This will wake up processes waiting on these timers. The
94 * wake-up requires ctx->ticks to be non zero, therefore we increment
95 * it before calling wake_up_locked().
9ec26907
TG
96 */
97void timerfd_clock_was_set(void)
4d672e7a 98{
2456e855 99 ktime_t moffs = ktime_mono_to_real(0);
9ec26907
TG
100 struct timerfd_ctx *ctx;
101 unsigned long flags;
4d672e7a 102
9ec26907
TG
103 rcu_read_lock();
104 list_for_each_entry_rcu(ctx, &cancel_list, clist) {
105 if (!ctx->might_cancel)
106 continue;
107 spin_lock_irqsave(&ctx->wqh.lock, flags);
2456e855
TG
108 if (ctx->moffs != moffs) {
109 ctx->moffs = KTIME_MAX;
1123d939 110 ctx->ticks++;
7dda7128 111 wake_up_locked_poll(&ctx->wqh, EPOLLIN);
9ec26907
TG
112 }
113 spin_unlock_irqrestore(&ctx->wqh.lock, flags);
114 }
115 rcu_read_unlock();
4d672e7a
DL
116}
117
66f7b0c8
TG
118static void timerfd_resume_work(struct work_struct *work)
119{
120 timerfd_clock_was_set();
121}
122
123static DECLARE_WORK(timerfd_work, timerfd_resume_work);
124
125/*
126 * Invoked from timekeeping_resume(). Defer the actual update to work so
127 * timerfd_clock_was_set() runs in task context.
128 */
129void timerfd_resume(void)
130{
131 schedule_work(&timerfd_work);
132}
133
1e38da30 134static void __timerfd_remove_cancel(struct timerfd_ctx *ctx)
99ee5315 135{
9ec26907
TG
136 if (ctx->might_cancel) {
137 ctx->might_cancel = false;
138 spin_lock(&cancel_lock);
139 list_del_rcu(&ctx->clist);
140 spin_unlock(&cancel_lock);
141 }
142}
99ee5315 143
1e38da30
TG
144static void timerfd_remove_cancel(struct timerfd_ctx *ctx)
145{
146 spin_lock(&ctx->cancel_lock);
147 __timerfd_remove_cancel(ctx);
148 spin_unlock(&ctx->cancel_lock);
149}
150
9ec26907
TG
151static bool timerfd_canceled(struct timerfd_ctx *ctx)
152{
2456e855 153 if (!ctx->might_cancel || ctx->moffs != KTIME_MAX)
99ee5315 154 return false;
2456e855 155 ctx->moffs = ktime_mono_to_real(0);
9ec26907
TG
156 return true;
157}
99ee5315 158
9ec26907
TG
159static void timerfd_setup_cancel(struct timerfd_ctx *ctx, int flags)
160{
1e38da30 161 spin_lock(&ctx->cancel_lock);
11ffa9d6
TP
162 if ((ctx->clockid == CLOCK_REALTIME ||
163 ctx->clockid == CLOCK_REALTIME_ALARM) &&
164 (flags & TFD_TIMER_ABSTIME) && (flags & TFD_TIMER_CANCEL_ON_SET)) {
9ec26907
TG
165 if (!ctx->might_cancel) {
166 ctx->might_cancel = true;
167 spin_lock(&cancel_lock);
168 list_add_rcu(&ctx->clist, &cancel_list);
169 spin_unlock(&cancel_lock);
170 }
1e38da30
TG
171 } else {
172 __timerfd_remove_cancel(ctx);
9ec26907 173 }
1e38da30 174 spin_unlock(&ctx->cancel_lock);
9ec26907 175}
99ee5315 176
9ec26907
TG
177static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx)
178{
179 ktime_t remaining;
99ee5315 180
11ffa9d6
TP
181 if (isalarm(ctx))
182 remaining = alarm_expires_remaining(&ctx->t.alarm);
183 else
b62526ed 184 remaining = hrtimer_expires_remaining_adjusted(&ctx->t.tmr);
11ffa9d6 185
8b0e1953 186 return remaining < 0 ? 0: remaining;
99ee5315
TG
187}
188
189static int timerfd_setup(struct timerfd_ctx *ctx, int flags,
bff41203 190 const struct itimerspec64 *ktmr)
b215e283
DL
191{
192 enum hrtimer_mode htmode;
193 ktime_t texp;
99ee5315 194 int clockid = ctx->clockid;
b215e283
DL
195
196 htmode = (flags & TFD_TIMER_ABSTIME) ?
197 HRTIMER_MODE_ABS: HRTIMER_MODE_REL;
198
bff41203 199 texp = timespec64_to_ktime(ktmr->it_value);
b215e283 200 ctx->expired = 0;
4d672e7a 201 ctx->ticks = 0;
bff41203 202 ctx->tintv = timespec64_to_ktime(ktmr->it_interval);
11ffa9d6
TP
203
204 if (isalarm(ctx)) {
205 alarm_init(&ctx->t.alarm,
206 ctx->clockid == CLOCK_REALTIME_ALARM ?
207 ALARM_REALTIME : ALARM_BOOTTIME,
208 timerfd_alarmproc);
209 } else {
210 hrtimer_init(&ctx->t.tmr, clockid, htmode);
211 hrtimer_set_expires(&ctx->t.tmr, texp);
212 ctx->t.tmr.function = timerfd_tmrproc;
213 }
214
2456e855 215 if (texp != 0) {
6cd889d4
AV
216 if (flags & TFD_TIMER_ABSTIME)
217 texp = timens_ktime_to_host(clockid, texp);
11ffa9d6
TP
218 if (isalarm(ctx)) {
219 if (flags & TFD_TIMER_ABSTIME)
220 alarm_start(&ctx->t.alarm, texp);
221 else
222 alarm_start_relative(&ctx->t.alarm, texp);
223 } else {
224 hrtimer_start(&ctx->t.tmr, texp, htmode);
225 }
226
99ee5315
TG
227 if (timerfd_canceled(ctx))
228 return -ECANCELED;
229 }
af9c4957
CG
230
231 ctx->settime_flags = flags & TFD_SETTIME_FLAGS;
99ee5315 232 return 0;
b215e283
DL
233}
234
235static int timerfd_release(struct inode *inode, struct file *file)
236{
237 struct timerfd_ctx *ctx = file->private_data;
238
9ec26907 239 timerfd_remove_cancel(ctx);
11ffa9d6
TP
240
241 if (isalarm(ctx))
242 alarm_cancel(&ctx->t.alarm);
243 else
244 hrtimer_cancel(&ctx->t.tmr);
9ec26907 245 kfree_rcu(ctx, rcu);
b215e283
DL
246 return 0;
247}
a11e1d43
LT
248
249static __poll_t timerfd_poll(struct file *file, poll_table *wait)
b215e283
DL
250{
251 struct timerfd_ctx *ctx = file->private_data;
a11e1d43
LT
252 __poll_t events = 0;
253 unsigned long flags;
b215e283 254
a11e1d43 255 poll_wait(file, &ctx->wqh, wait);
b215e283 256
a11e1d43
LT
257 spin_lock_irqsave(&ctx->wqh.lock, flags);
258 if (ctx->ticks)
259 events |= EPOLLIN;
260 spin_unlock_irqrestore(&ctx->wqh.lock, flags);
b215e283 261
a11e1d43 262 return events;
b215e283
DL
263}
264
265static ssize_t timerfd_read(struct file *file, char __user *buf, size_t count,
266 loff_t *ppos)
267{
268 struct timerfd_ctx *ctx = file->private_data;
269 ssize_t res;
09828402 270 u64 ticks = 0;
b215e283
DL
271
272 if (count < sizeof(ticks))
273 return -EINVAL;
18963c01 274 spin_lock_irq(&ctx->wqh.lock);
8120a8aa
MN
275 if (file->f_flags & O_NONBLOCK)
276 res = -EAGAIN;
277 else
278 res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks);
99ee5315 279
9ec26907
TG
280 /*
281 * If clock has changed, we do not care about the
282 * ticks and we do not rearm the timer. Userspace must
283 * reevaluate anyway.
284 */
285 if (timerfd_canceled(ctx)) {
286 ctx->ticks = 0;
287 ctx->expired = 0;
288 res = -ECANCELED;
289 }
290
4d672e7a
DL
291 if (ctx->ticks) {
292 ticks = ctx->ticks;
99ee5315 293
2456e855 294 if (ctx->expired && ctx->tintv) {
b215e283 295 /*
2456e855 296 * If tintv != 0, this is a periodic timer that
b215e283
DL
297 * needs to be re-armed. We avoid doing it in the timer
298 * callback to avoid DoS attacks specifying a very
299 * short timer period.
300 */
11ffa9d6
TP
301 if (isalarm(ctx)) {
302 ticks += alarm_forward_now(
303 &ctx->t.alarm, ctx->tintv) - 1;
304 alarm_restart(&ctx->t.alarm);
305 } else {
306 ticks += hrtimer_forward_now(&ctx->t.tmr,
307 ctx->tintv) - 1;
308 hrtimer_restart(&ctx->t.tmr);
309 }
4d672e7a
DL
310 }
311 ctx->expired = 0;
312 ctx->ticks = 0;
b215e283 313 }
18963c01 314 spin_unlock_irq(&ctx->wqh.lock);
b215e283 315 if (ticks)
09828402 316 res = put_user(ticks, (u64 __user *) buf) ? -EFAULT: sizeof(ticks);
b215e283
DL
317 return res;
318}
319
af9c4957 320#ifdef CONFIG_PROC_FS
a3816ab0 321static void timerfd_show(struct seq_file *m, struct file *file)
af9c4957
CG
322{
323 struct timerfd_ctx *ctx = file->private_data;
bde9e963 324 struct timespec64 value, interval;
af9c4957
CG
325
326 spin_lock_irq(&ctx->wqh.lock);
bde9e963
AB
327 value = ktime_to_timespec64(timerfd_get_remaining(ctx));
328 interval = ktime_to_timespec64(ctx->tintv);
af9c4957
CG
329 spin_unlock_irq(&ctx->wqh.lock);
330
a3816ab0
JP
331 seq_printf(m,
332 "clockid: %d\n"
333 "ticks: %llu\n"
334 "settime flags: 0%o\n"
335 "it_value: (%llu, %llu)\n"
336 "it_interval: (%llu, %llu)\n",
337 ctx->clockid,
338 (unsigned long long)ctx->ticks,
339 ctx->settime_flags,
bde9e963
AB
340 (unsigned long long)value.tv_sec,
341 (unsigned long long)value.tv_nsec,
342 (unsigned long long)interval.tv_sec,
343 (unsigned long long)interval.tv_nsec);
af9c4957
CG
344}
345#else
346#define timerfd_show NULL
347#endif
348
5442e9fb
CG
349#ifdef CONFIG_CHECKPOINT_RESTORE
350static long timerfd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
351{
352 struct timerfd_ctx *ctx = file->private_data;
353 int ret = 0;
354
355 switch (cmd) {
356 case TFD_IOC_SET_TICKS: {
357 u64 ticks;
358
359 if (copy_from_user(&ticks, (u64 __user *)arg, sizeof(ticks)))
360 return -EFAULT;
361 if (!ticks)
362 return -EINVAL;
363
364 spin_lock_irq(&ctx->wqh.lock);
365 if (!timerfd_canceled(ctx)) {
366 ctx->ticks = ticks;
7dda7128 367 wake_up_locked_poll(&ctx->wqh, EPOLLIN);
5442e9fb
CG
368 } else
369 ret = -ECANCELED;
370 spin_unlock_irq(&ctx->wqh.lock);
371 break;
372 }
373 default:
374 ret = -ENOTTY;
375 break;
376 }
377
378 return ret;
379}
380#else
381#define timerfd_ioctl NULL
382#endif
383
b215e283
DL
384static const struct file_operations timerfd_fops = {
385 .release = timerfd_release,
a11e1d43 386 .poll = timerfd_poll,
b215e283 387 .read = timerfd_read,
6038f373 388 .llseek = noop_llseek,
af9c4957 389 .show_fdinfo = timerfd_show,
5442e9fb 390 .unlocked_ioctl = timerfd_ioctl,
b215e283
DL
391};
392
2903ff01 393static int timerfd_fget(int fd, struct fd *p)
4d672e7a 394{
2903ff01
AV
395 struct fd f = fdget(fd);
396 if (!f.file)
397 return -EBADF;
398 if (f.file->f_op != &timerfd_fops) {
399 fdput(f);
400 return -EINVAL;
4d672e7a 401 }
2903ff01
AV
402 *p = f;
403 return 0;
4d672e7a
DL
404}
405
836f92ad 406SYSCALL_DEFINE2(timerfd_create, int, clockid, int, flags)
b215e283 407{
2030a42c 408 int ufd;
b215e283 409 struct timerfd_ctx *ctx;
b215e283 410
e38b36f3
UD
411 /* Check the TFD_* constants for consistency. */
412 BUILD_BUG_ON(TFD_CLOEXEC != O_CLOEXEC);
413 BUILD_BUG_ON(TFD_NONBLOCK != O_NONBLOCK);
414
610d18f4
DL
415 if ((flags & ~TFD_CREATE_FLAGS) ||
416 (clockid != CLOCK_MONOTONIC &&
11ffa9d6
TP
417 clockid != CLOCK_REALTIME &&
418 clockid != CLOCK_REALTIME_ALARM &&
4a2378a9 419 clockid != CLOCK_BOOTTIME &&
11ffa9d6 420 clockid != CLOCK_BOOTTIME_ALARM))
b215e283 421 return -EINVAL;
4d672e7a 422
25b68a8f
SS
423 if ((clockid == CLOCK_REALTIME_ALARM ||
424 clockid == CLOCK_BOOTTIME_ALARM) &&
425 !capable(CAP_WAKE_ALARM))
2895a5e5
EC
426 return -EPERM;
427
4d672e7a
DL
428 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
429 if (!ctx)
430 return -ENOMEM;
431
432 init_waitqueue_head(&ctx->wqh);
1e38da30 433 spin_lock_init(&ctx->cancel_lock);
4d672e7a 434 ctx->clockid = clockid;
11ffa9d6
TP
435
436 if (isalarm(ctx))
437 alarm_init(&ctx->t.alarm,
438 ctx->clockid == CLOCK_REALTIME_ALARM ?
439 ALARM_REALTIME : ALARM_BOOTTIME,
440 timerfd_alarmproc);
441 else
442 hrtimer_init(&ctx->t.tmr, clockid, HRTIMER_MODE_ABS);
443
2456e855 444 ctx->moffs = ktime_mono_to_real(0);
4d672e7a 445
11fcb6c1 446 ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx,
628ff7c1 447 O_RDWR | (flags & TFD_SHARED_FCNTL_FLAGS));
2030a42c 448 if (ufd < 0)
4d672e7a 449 kfree(ctx);
4d672e7a
DL
450
451 return ufd;
452}
453
9d94b9e2 454static int do_timerfd_settime(int ufd, int flags,
bff41203
DD
455 const struct itimerspec64 *new,
456 struct itimerspec64 *old)
4d672e7a 457{
2903ff01 458 struct fd f;
4d672e7a 459 struct timerfd_ctx *ctx;
2903ff01 460 int ret;
4d672e7a 461
610d18f4 462 if ((flags & ~TFD_SETTIME_FLAGS) ||
bff41203 463 !itimerspec64_valid(new))
b215e283
DL
464 return -EINVAL;
465
2903ff01
AV
466 ret = timerfd_fget(ufd, &f);
467 if (ret)
468 return ret;
469 ctx = f.file->private_data;
b215e283 470
25b68a8f 471 if (isalarm(ctx) && !capable(CAP_WAKE_ALARM)) {
2895a5e5
EC
472 fdput(f);
473 return -EPERM;
474 }
475
9ec26907
TG
476 timerfd_setup_cancel(ctx, flags);
477
4d672e7a
DL
478 /*
479 * We need to stop the existing timer before reprogramming
480 * it to the new values.
481 */
482 for (;;) {
483 spin_lock_irq(&ctx->wqh.lock);
11ffa9d6
TP
484
485 if (isalarm(ctx)) {
486 if (alarm_try_to_cancel(&ctx->t.alarm) >= 0)
487 break;
488 } else {
489 if (hrtimer_try_to_cancel(&ctx->t.tmr) >= 0)
490 break;
491 }
18963c01 492 spin_unlock_irq(&ctx->wqh.lock);
a125ecc1
AMG
493
494 if (isalarm(ctx))
495 hrtimer_cancel_wait_running(&ctx->t.alarm.timer);
496 else
497 hrtimer_cancel_wait_running(&ctx->t.tmr);
b215e283
DL
498 }
499
4d672e7a
DL
500 /*
501 * If the timer is expired and it's periodic, we need to advance it
502 * because the caller may want to know the previous expiration time.
503 * We do not update "ticks" and "expired" since the timer will be
504 * re-programmed again in the following timerfd_setup() call.
505 */
2456e855 506 if (ctx->expired && ctx->tintv) {
11ffa9d6
TP
507 if (isalarm(ctx))
508 alarm_forward_now(&ctx->t.alarm, ctx->tintv);
509 else
510 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv);
511 }
b215e283 512
bff41203
DD
513 old->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx));
514 old->it_interval = ktime_to_timespec64(ctx->tintv);
4d672e7a
DL
515
516 /*
517 * Re-program the timer to the new value ...
518 */
9d94b9e2 519 ret = timerfd_setup(ctx, flags, new);
4d672e7a
DL
520
521 spin_unlock_irq(&ctx->wqh.lock);
2903ff01 522 fdput(f);
99ee5315 523 return ret;
4d672e7a
DL
524}
525
bff41203 526static int do_timerfd_gettime(int ufd, struct itimerspec64 *t)
4d672e7a 527{
2903ff01 528 struct fd f;
4d672e7a 529 struct timerfd_ctx *ctx;
2903ff01
AV
530 int ret = timerfd_fget(ufd, &f);
531 if (ret)
532 return ret;
533 ctx = f.file->private_data;
4d672e7a
DL
534
535 spin_lock_irq(&ctx->wqh.lock);
2456e855 536 if (ctx->expired && ctx->tintv) {
4d672e7a 537 ctx->expired = 0;
11ffa9d6
TP
538
539 if (isalarm(ctx)) {
540 ctx->ticks +=
541 alarm_forward_now(
542 &ctx->t.alarm, ctx->tintv) - 1;
543 alarm_restart(&ctx->t.alarm);
544 } else {
545 ctx->ticks +=
546 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv)
547 - 1;
548 hrtimer_restart(&ctx->t.tmr);
549 }
4d672e7a 550 }
bff41203
DD
551 t->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx));
552 t->it_interval = ktime_to_timespec64(ctx->tintv);
4d672e7a 553 spin_unlock_irq(&ctx->wqh.lock);
2903ff01 554 fdput(f);
9d94b9e2
AV
555 return 0;
556}
557
558SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
6ff84735
DD
559 const struct __kernel_itimerspec __user *, utmr,
560 struct __kernel_itimerspec __user *, otmr)
9d94b9e2 561{
bff41203 562 struct itimerspec64 new, old;
9d94b9e2
AV
563 int ret;
564
bff41203 565 if (get_itimerspec64(&new, utmr))
9d94b9e2
AV
566 return -EFAULT;
567 ret = do_timerfd_settime(ufd, flags, &new, &old);
568 if (ret)
569 return ret;
bff41203 570 if (otmr && put_itimerspec64(&old, otmr))
9d94b9e2
AV
571 return -EFAULT;
572
573 return ret;
574}
4d672e7a 575
6ff84735 576SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct __kernel_itimerspec __user *, otmr)
9d94b9e2 577{
bff41203 578 struct itimerspec64 kotmr;
9d94b9e2
AV
579 int ret = do_timerfd_gettime(ufd, &kotmr);
580 if (ret)
581 return ret;
bff41203 582 return put_itimerspec64(&kotmr, otmr) ? -EFAULT : 0;
b215e283
DL
583}
584
6ff84735 585#ifdef CONFIG_COMPAT_32BIT_TIME
8dabe724 586SYSCALL_DEFINE4(timerfd_settime32, int, ufd, int, flags,
9afc5eee
AB
587 const struct old_itimerspec32 __user *, utmr,
588 struct old_itimerspec32 __user *, otmr)
9d94b9e2 589{
bff41203 590 struct itimerspec64 new, old;
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591 int ret;
592
9afc5eee 593 if (get_old_itimerspec32(&new, utmr))
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594 return -EFAULT;
595 ret = do_timerfd_settime(ufd, flags, &new, &old);
596 if (ret)
597 return ret;
9afc5eee 598 if (otmr && put_old_itimerspec32(&old, otmr))
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599 return -EFAULT;
600 return ret;
601}
602
8dabe724 603SYSCALL_DEFINE2(timerfd_gettime32, int, ufd,
9afc5eee 604 struct old_itimerspec32 __user *, otmr)
9d94b9e2 605{
bff41203 606 struct itimerspec64 kotmr;
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607 int ret = do_timerfd_gettime(ufd, &kotmr);
608 if (ret)
609 return ret;
9afc5eee 610 return put_old_itimerspec32(&kotmr, otmr) ? -EFAULT : 0;
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611}
612#endif