Lines Matching refs:ctx
52 static inline bool isalarm(struct timerfd_ctx *ctx) in isalarm() argument
54 return ctx->clockid == CLOCK_REALTIME_ALARM || in isalarm()
55 ctx->clockid == CLOCK_BOOTTIME_ALARM; in isalarm()
63 static void timerfd_triggered(struct timerfd_ctx *ctx) in timerfd_triggered() argument
67 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_triggered()
68 ctx->expired = 1; in timerfd_triggered()
69 ctx->ticks++; in timerfd_triggered()
70 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_triggered()
71 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_triggered()
76 struct timerfd_ctx *ctx = container_of(htmr, struct timerfd_ctx, in timerfd_tmrproc() local
78 timerfd_triggered(ctx); in timerfd_tmrproc()
84 struct timerfd_ctx *ctx = container_of(alarm, struct timerfd_ctx, in timerfd_alarmproc() local
86 timerfd_triggered(ctx); in timerfd_alarmproc()
98 struct timerfd_ctx *ctx; in timerfd_clock_was_set() local
102 list_for_each_entry_rcu(ctx, &cancel_list, clist) { in timerfd_clock_was_set()
103 if (!ctx->might_cancel) in timerfd_clock_was_set()
105 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_clock_was_set()
106 if (ctx->moffs != moffs) { in timerfd_clock_was_set()
107 ctx->moffs = KTIME_MAX; in timerfd_clock_was_set()
108 ctx->ticks++; in timerfd_clock_was_set()
109 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_clock_was_set()
111 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_clock_was_set()
132 static void __timerfd_remove_cancel(struct timerfd_ctx *ctx) in __timerfd_remove_cancel() argument
134 if (ctx->might_cancel) { in __timerfd_remove_cancel()
135 ctx->might_cancel = false; in __timerfd_remove_cancel()
137 list_del_rcu(&ctx->clist); in __timerfd_remove_cancel()
142 static void timerfd_remove_cancel(struct timerfd_ctx *ctx) in timerfd_remove_cancel() argument
144 spin_lock(&ctx->cancel_lock); in timerfd_remove_cancel()
145 __timerfd_remove_cancel(ctx); in timerfd_remove_cancel()
146 spin_unlock(&ctx->cancel_lock); in timerfd_remove_cancel()
149 static bool timerfd_canceled(struct timerfd_ctx *ctx) in timerfd_canceled() argument
151 if (!ctx->might_cancel || ctx->moffs != KTIME_MAX) in timerfd_canceled()
153 ctx->moffs = ktime_mono_to_real(0); in timerfd_canceled()
157 static void timerfd_setup_cancel(struct timerfd_ctx *ctx, int flags) in timerfd_setup_cancel() argument
159 spin_lock(&ctx->cancel_lock); in timerfd_setup_cancel()
160 if ((ctx->clockid == CLOCK_REALTIME || in timerfd_setup_cancel()
161 ctx->clockid == CLOCK_REALTIME_ALARM) && in timerfd_setup_cancel()
163 if (!ctx->might_cancel) { in timerfd_setup_cancel()
164 ctx->might_cancel = true; in timerfd_setup_cancel()
166 list_add_rcu(&ctx->clist, &cancel_list); in timerfd_setup_cancel()
170 __timerfd_remove_cancel(ctx); in timerfd_setup_cancel()
172 spin_unlock(&ctx->cancel_lock); in timerfd_setup_cancel()
175 static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx) in timerfd_get_remaining() argument
179 if (isalarm(ctx)) in timerfd_get_remaining()
180 remaining = alarm_expires_remaining(&ctx->t.alarm); in timerfd_get_remaining()
182 remaining = hrtimer_expires_remaining_adjusted(&ctx->t.tmr); in timerfd_get_remaining()
187 static int timerfd_setup(struct timerfd_ctx *ctx, int flags, in timerfd_setup() argument
192 int clockid = ctx->clockid; in timerfd_setup()
198 ctx->expired = 0; in timerfd_setup()
199 ctx->ticks = 0; in timerfd_setup()
200 ctx->tintv = timespec64_to_ktime(ktmr->it_interval); in timerfd_setup()
202 if (isalarm(ctx)) { in timerfd_setup()
203 alarm_init(&ctx->t.alarm, in timerfd_setup()
204 ctx->clockid == CLOCK_REALTIME_ALARM ? in timerfd_setup()
208 hrtimer_setup(&ctx->t.tmr, timerfd_tmrproc, clockid, htmode); in timerfd_setup()
209 hrtimer_set_expires(&ctx->t.tmr, texp); in timerfd_setup()
215 if (isalarm(ctx)) { in timerfd_setup()
217 alarm_start(&ctx->t.alarm, texp); in timerfd_setup()
219 alarm_start_relative(&ctx->t.alarm, texp); in timerfd_setup()
221 hrtimer_start(&ctx->t.tmr, texp, htmode); in timerfd_setup()
224 if (timerfd_canceled(ctx)) in timerfd_setup()
228 ctx->settime_flags = flags & TFD_SETTIME_FLAGS; in timerfd_setup()
234 struct timerfd_ctx *ctx = file->private_data; in timerfd_release() local
236 timerfd_remove_cancel(ctx); in timerfd_release()
238 if (isalarm(ctx)) in timerfd_release()
239 alarm_cancel(&ctx->t.alarm); in timerfd_release()
241 hrtimer_cancel(&ctx->t.tmr); in timerfd_release()
242 kfree_rcu(ctx, rcu); in timerfd_release()
248 struct timerfd_ctx *ctx = file->private_data; in timerfd_poll() local
252 poll_wait(file, &ctx->wqh, wait); in timerfd_poll()
254 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_poll()
255 if (ctx->ticks) in timerfd_poll()
257 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_poll()
265 struct timerfd_ctx *ctx = file->private_data; in timerfd_read_iter() local
272 spin_lock_irq(&ctx->wqh.lock); in timerfd_read_iter()
276 res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks); in timerfd_read_iter()
283 if (timerfd_canceled(ctx)) { in timerfd_read_iter()
284 ctx->ticks = 0; in timerfd_read_iter()
285 ctx->expired = 0; in timerfd_read_iter()
289 if (ctx->ticks) { in timerfd_read_iter()
290 ticks = ctx->ticks; in timerfd_read_iter()
292 if (ctx->expired && ctx->tintv) { in timerfd_read_iter()
299 if (isalarm(ctx)) { in timerfd_read_iter()
301 &ctx->t.alarm, ctx->tintv) - 1; in timerfd_read_iter()
302 alarm_restart(&ctx->t.alarm); in timerfd_read_iter()
304 ticks += hrtimer_forward_now(&ctx->t.tmr, in timerfd_read_iter()
305 ctx->tintv) - 1; in timerfd_read_iter()
306 hrtimer_restart(&ctx->t.tmr); in timerfd_read_iter()
309 ctx->expired = 0; in timerfd_read_iter()
310 ctx->ticks = 0; in timerfd_read_iter()
312 spin_unlock_irq(&ctx->wqh.lock); in timerfd_read_iter()
324 struct timerfd_ctx *ctx = file->private_data; in timerfd_show() local
327 spin_lock_irq(&ctx->wqh.lock); in timerfd_show()
328 value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in timerfd_show()
329 interval = ktime_to_timespec64(ctx->tintv); in timerfd_show()
330 spin_unlock_irq(&ctx->wqh.lock); in timerfd_show()
338 ctx->clockid, in timerfd_show()
339 (unsigned long long)ctx->ticks, in timerfd_show()
340 ctx->settime_flags, in timerfd_show()
353 struct timerfd_ctx *ctx = file->private_data; in timerfd_ioctl() local
365 spin_lock_irq(&ctx->wqh.lock); in timerfd_ioctl()
366 if (!timerfd_canceled(ctx)) { in timerfd_ioctl()
367 ctx->ticks = ticks; in timerfd_ioctl()
368 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_ioctl()
371 spin_unlock_irq(&ctx->wqh.lock); in timerfd_ioctl()
397 struct timerfd_ctx *ctx; in SYSCALL_DEFINE2() local
417 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); in SYSCALL_DEFINE2()
418 if (!ctx) in SYSCALL_DEFINE2()
421 init_waitqueue_head(&ctx->wqh); in SYSCALL_DEFINE2()
422 spin_lock_init(&ctx->cancel_lock); in SYSCALL_DEFINE2()
423 ctx->clockid = clockid; in SYSCALL_DEFINE2()
425 if (isalarm(ctx)) in SYSCALL_DEFINE2()
426 alarm_init(&ctx->t.alarm, in SYSCALL_DEFINE2()
427 ctx->clockid == CLOCK_REALTIME_ALARM ? in SYSCALL_DEFINE2()
431 hrtimer_setup(&ctx->t.tmr, timerfd_tmrproc, clockid, HRTIMER_MODE_ABS); in SYSCALL_DEFINE2()
433 ctx->moffs = ktime_mono_to_real(0); in SYSCALL_DEFINE2()
437 kfree(ctx); in SYSCALL_DEFINE2()
441 file = anon_inode_getfile_fmode("[timerfd]", &timerfd_fops, ctx, in SYSCALL_DEFINE2()
446 kfree(ctx); in SYSCALL_DEFINE2()
458 struct timerfd_ctx *ctx; in do_timerfd_settime() local
472 ctx = fd_file(f)->private_data; in do_timerfd_settime()
474 if (isalarm(ctx) && !capable(CAP_WAKE_ALARM)) in do_timerfd_settime()
477 timerfd_setup_cancel(ctx, flags); in do_timerfd_settime()
484 spin_lock_irq(&ctx->wqh.lock); in do_timerfd_settime()
486 if (isalarm(ctx)) { in do_timerfd_settime()
487 if (alarm_try_to_cancel(&ctx->t.alarm) >= 0) in do_timerfd_settime()
490 if (hrtimer_try_to_cancel(&ctx->t.tmr) >= 0) in do_timerfd_settime()
493 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_settime()
495 if (isalarm(ctx)) in do_timerfd_settime()
496 hrtimer_cancel_wait_running(&ctx->t.alarm.timer); in do_timerfd_settime()
498 hrtimer_cancel_wait_running(&ctx->t.tmr); in do_timerfd_settime()
507 if (ctx->expired && ctx->tintv) { in do_timerfd_settime()
508 if (isalarm(ctx)) in do_timerfd_settime()
509 alarm_forward_now(&ctx->t.alarm, ctx->tintv); in do_timerfd_settime()
511 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv); in do_timerfd_settime()
514 old->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in do_timerfd_settime()
515 old->it_interval = ktime_to_timespec64(ctx->tintv); in do_timerfd_settime()
520 ret = timerfd_setup(ctx, flags, new); in do_timerfd_settime()
522 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_settime()
528 struct timerfd_ctx *ctx; in do_timerfd_gettime() local
535 ctx = fd_file(f)->private_data; in do_timerfd_gettime()
537 spin_lock_irq(&ctx->wqh.lock); in do_timerfd_gettime()
538 if (ctx->expired && ctx->tintv) { in do_timerfd_gettime()
539 ctx->expired = 0; in do_timerfd_gettime()
541 if (isalarm(ctx)) { in do_timerfd_gettime()
542 ctx->ticks += in do_timerfd_gettime()
544 &ctx->t.alarm, ctx->tintv) - 1; in do_timerfd_gettime()
545 alarm_restart(&ctx->t.alarm); in do_timerfd_gettime()
547 ctx->ticks += in do_timerfd_gettime()
548 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv) in do_timerfd_gettime()
550 hrtimer_restart(&ctx->t.tmr); in do_timerfd_gettime()
553 t->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in do_timerfd_gettime()
554 t->it_interval = ktime_to_timespec64(ctx->tintv); in do_timerfd_gettime()
555 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_gettime()