Lines Matching refs:ctx
54 static inline bool isalarm(struct timerfd_ctx *ctx) in isalarm() argument
56 return ctx->clockid == CLOCK_REALTIME_ALARM || in isalarm()
57 ctx->clockid == CLOCK_BOOTTIME_ALARM; in isalarm()
65 static void timerfd_triggered(struct timerfd_ctx *ctx) in timerfd_triggered() argument
69 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_triggered()
70 ctx->expired = 1; in timerfd_triggered()
71 ctx->ticks++; in timerfd_triggered()
72 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_triggered()
73 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_triggered()
78 struct timerfd_ctx *ctx = container_of(htmr, struct timerfd_ctx, in timerfd_tmrproc() local
80 timerfd_triggered(ctx); in timerfd_tmrproc()
87 struct timerfd_ctx *ctx = container_of(alarm, struct timerfd_ctx, in timerfd_alarmproc() local
89 timerfd_triggered(ctx); in timerfd_alarmproc()
102 struct timerfd_ctx *ctx; in timerfd_clock_was_set() local
106 list_for_each_entry_rcu(ctx, &cancel_list, clist) { in timerfd_clock_was_set()
107 if (!ctx->might_cancel) in timerfd_clock_was_set()
109 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_clock_was_set()
110 if (ctx->moffs != moffs) { in timerfd_clock_was_set()
111 ctx->moffs = KTIME_MAX; in timerfd_clock_was_set()
112 ctx->ticks++; in timerfd_clock_was_set()
113 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_clock_was_set()
115 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_clock_was_set()
120 static void __timerfd_remove_cancel(struct timerfd_ctx *ctx) in __timerfd_remove_cancel() argument
122 if (ctx->might_cancel) { in __timerfd_remove_cancel()
123 ctx->might_cancel = false; in __timerfd_remove_cancel()
125 list_del_rcu(&ctx->clist); in __timerfd_remove_cancel()
130 static void timerfd_remove_cancel(struct timerfd_ctx *ctx) in timerfd_remove_cancel() argument
132 spin_lock(&ctx->cancel_lock); in timerfd_remove_cancel()
133 __timerfd_remove_cancel(ctx); in timerfd_remove_cancel()
134 spin_unlock(&ctx->cancel_lock); in timerfd_remove_cancel()
137 static bool timerfd_canceled(struct timerfd_ctx *ctx) in timerfd_canceled() argument
139 if (!ctx->might_cancel || ctx->moffs != KTIME_MAX) in timerfd_canceled()
141 ctx->moffs = ktime_mono_to_real(0); in timerfd_canceled()
145 static void timerfd_setup_cancel(struct timerfd_ctx *ctx, int flags) in timerfd_setup_cancel() argument
147 spin_lock(&ctx->cancel_lock); in timerfd_setup_cancel()
148 if ((ctx->clockid == CLOCK_REALTIME || in timerfd_setup_cancel()
149 ctx->clockid == CLOCK_REALTIME_ALARM) && in timerfd_setup_cancel()
151 if (!ctx->might_cancel) { in timerfd_setup_cancel()
152 ctx->might_cancel = true; in timerfd_setup_cancel()
154 list_add_rcu(&ctx->clist, &cancel_list); in timerfd_setup_cancel()
158 __timerfd_remove_cancel(ctx); in timerfd_setup_cancel()
160 spin_unlock(&ctx->cancel_lock); in timerfd_setup_cancel()
163 static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx) in timerfd_get_remaining() argument
167 if (isalarm(ctx)) in timerfd_get_remaining()
168 remaining = alarm_expires_remaining(&ctx->t.alarm); in timerfd_get_remaining()
170 remaining = hrtimer_expires_remaining_adjusted(&ctx->t.tmr); in timerfd_get_remaining()
175 static int timerfd_setup(struct timerfd_ctx *ctx, int flags, in timerfd_setup() argument
180 int clockid = ctx->clockid; in timerfd_setup()
186 ctx->expired = 0; in timerfd_setup()
187 ctx->ticks = 0; in timerfd_setup()
188 ctx->tintv = timespec64_to_ktime(ktmr->it_interval); in timerfd_setup()
190 if (isalarm(ctx)) { in timerfd_setup()
191 alarm_init(&ctx->t.alarm, in timerfd_setup()
192 ctx->clockid == CLOCK_REALTIME_ALARM ? in timerfd_setup()
196 hrtimer_init(&ctx->t.tmr, clockid, htmode); in timerfd_setup()
197 hrtimer_set_expires(&ctx->t.tmr, texp); in timerfd_setup()
198 ctx->t.tmr.function = timerfd_tmrproc; in timerfd_setup()
204 if (isalarm(ctx)) { in timerfd_setup()
206 alarm_start(&ctx->t.alarm, texp); in timerfd_setup()
208 alarm_start_relative(&ctx->t.alarm, texp); in timerfd_setup()
210 hrtimer_start(&ctx->t.tmr, texp, htmode); in timerfd_setup()
213 if (timerfd_canceled(ctx)) in timerfd_setup()
217 ctx->settime_flags = flags & TFD_SETTIME_FLAGS; in timerfd_setup()
223 struct timerfd_ctx *ctx = file->private_data; in timerfd_release() local
225 timerfd_remove_cancel(ctx); in timerfd_release()
227 if (isalarm(ctx)) in timerfd_release()
228 alarm_cancel(&ctx->t.alarm); in timerfd_release()
230 hrtimer_cancel(&ctx->t.tmr); in timerfd_release()
231 kfree_rcu(ctx, rcu); in timerfd_release()
237 struct timerfd_ctx *ctx = file->private_data; in timerfd_poll() local
241 poll_wait(file, &ctx->wqh, wait); in timerfd_poll()
243 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_poll()
244 if (ctx->ticks) in timerfd_poll()
246 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_poll()
254 struct timerfd_ctx *ctx = file->private_data; in timerfd_read() local
260 spin_lock_irq(&ctx->wqh.lock); in timerfd_read()
264 res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks); in timerfd_read()
271 if (timerfd_canceled(ctx)) { in timerfd_read()
272 ctx->ticks = 0; in timerfd_read()
273 ctx->expired = 0; in timerfd_read()
277 if (ctx->ticks) { in timerfd_read()
278 ticks = ctx->ticks; in timerfd_read()
280 if (ctx->expired && ctx->tintv) { in timerfd_read()
287 if (isalarm(ctx)) { in timerfd_read()
289 &ctx->t.alarm, ctx->tintv) - 1; in timerfd_read()
290 alarm_restart(&ctx->t.alarm); in timerfd_read()
292 ticks += hrtimer_forward_now(&ctx->t.tmr, in timerfd_read()
293 ctx->tintv) - 1; in timerfd_read()
294 hrtimer_restart(&ctx->t.tmr); in timerfd_read()
297 ctx->expired = 0; in timerfd_read()
298 ctx->ticks = 0; in timerfd_read()
300 spin_unlock_irq(&ctx->wqh.lock); in timerfd_read()
309 struct timerfd_ctx *ctx = file->private_data; in timerfd_show() local
312 spin_lock_irq(&ctx->wqh.lock); in timerfd_show()
313 value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in timerfd_show()
314 interval = ktime_to_timespec64(ctx->tintv); in timerfd_show()
315 spin_unlock_irq(&ctx->wqh.lock); in timerfd_show()
323 ctx->clockid, in timerfd_show()
324 (unsigned long long)ctx->ticks, in timerfd_show()
325 ctx->settime_flags, in timerfd_show()
338 struct timerfd_ctx *ctx = file->private_data; in timerfd_ioctl() local
350 spin_lock_irq(&ctx->wqh.lock); in timerfd_ioctl()
351 if (!timerfd_canceled(ctx)) { in timerfd_ioctl()
352 ctx->ticks = ticks; in timerfd_ioctl()
353 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_ioctl()
356 spin_unlock_irq(&ctx->wqh.lock); in timerfd_ioctl()
395 struct timerfd_ctx *ctx; in SYSCALL_DEFINE2() local
415 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); in SYSCALL_DEFINE2()
416 if (!ctx) in SYSCALL_DEFINE2()
419 init_waitqueue_head(&ctx->wqh); in SYSCALL_DEFINE2()
420 spin_lock_init(&ctx->cancel_lock); in SYSCALL_DEFINE2()
421 ctx->clockid = clockid; in SYSCALL_DEFINE2()
423 if (isalarm(ctx)) in SYSCALL_DEFINE2()
424 alarm_init(&ctx->t.alarm, in SYSCALL_DEFINE2()
425 ctx->clockid == CLOCK_REALTIME_ALARM ? in SYSCALL_DEFINE2()
429 hrtimer_init(&ctx->t.tmr, clockid, HRTIMER_MODE_ABS); in SYSCALL_DEFINE2()
431 ctx->moffs = ktime_mono_to_real(0); in SYSCALL_DEFINE2()
435 ufd = anon_inode_getfd(file_name_buf, &timerfd_fops, ctx, in SYSCALL_DEFINE2()
438 kfree(ctx); in SYSCALL_DEFINE2()
448 struct timerfd_ctx *ctx; in do_timerfd_settime() local
458 ctx = f.file->private_data; in do_timerfd_settime()
460 if (isalarm(ctx) && !capable(CAP_WAKE_ALARM)) { in do_timerfd_settime()
465 timerfd_setup_cancel(ctx, flags); in do_timerfd_settime()
472 spin_lock_irq(&ctx->wqh.lock); in do_timerfd_settime()
474 if (isalarm(ctx)) { in do_timerfd_settime()
475 if (alarm_try_to_cancel(&ctx->t.alarm) >= 0) in do_timerfd_settime()
478 if (hrtimer_try_to_cancel(&ctx->t.tmr) >= 0) in do_timerfd_settime()
481 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_settime()
483 if (isalarm(ctx)) in do_timerfd_settime()
484 hrtimer_cancel_wait_running(&ctx->t.alarm.timer); in do_timerfd_settime()
486 hrtimer_cancel_wait_running(&ctx->t.tmr); in do_timerfd_settime()
495 if (ctx->expired && ctx->tintv) { in do_timerfd_settime()
496 if (isalarm(ctx)) in do_timerfd_settime()
497 alarm_forward_now(&ctx->t.alarm, ctx->tintv); in do_timerfd_settime()
499 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv); in do_timerfd_settime()
502 old->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in do_timerfd_settime()
503 old->it_interval = ktime_to_timespec64(ctx->tintv); in do_timerfd_settime()
508 ret = timerfd_setup(ctx, flags, new); in do_timerfd_settime()
510 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_settime()
518 struct timerfd_ctx *ctx; in do_timerfd_gettime() local
522 ctx = f.file->private_data; in do_timerfd_gettime()
524 spin_lock_irq(&ctx->wqh.lock); in do_timerfd_gettime()
525 if (ctx->expired && ctx->tintv) { in do_timerfd_gettime()
526 ctx->expired = 0; in do_timerfd_gettime()
528 if (isalarm(ctx)) { in do_timerfd_gettime()
529 ctx->ticks += in do_timerfd_gettime()
531 &ctx->t.alarm, ctx->tintv) - 1; in do_timerfd_gettime()
532 alarm_restart(&ctx->t.alarm); in do_timerfd_gettime()
534 ctx->ticks += in do_timerfd_gettime()
535 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv) in do_timerfd_gettime()
537 hrtimer_restart(&ctx->t.tmr); in do_timerfd_gettime()
540 t->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in do_timerfd_gettime()
541 t->it_interval = ktime_to_timespec64(ctx->tintv); in do_timerfd_gettime()
542 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_gettime()