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()
85 struct timerfd_ctx *ctx = container_of(alarm, struct timerfd_ctx, in timerfd_alarmproc() local
87 timerfd_triggered(ctx); in timerfd_alarmproc()
100 struct timerfd_ctx *ctx; in timerfd_clock_was_set() local
104 list_for_each_entry_rcu(ctx, &cancel_list, clist) { in timerfd_clock_was_set()
105 if (!ctx->might_cancel) in timerfd_clock_was_set()
107 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_clock_was_set()
108 if (ctx->moffs != moffs) { in timerfd_clock_was_set()
109 ctx->moffs = KTIME_MAX; in timerfd_clock_was_set()
110 ctx->ticks++; in timerfd_clock_was_set()
111 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_clock_was_set()
113 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_clock_was_set()
118 static void __timerfd_remove_cancel(struct timerfd_ctx *ctx) in __timerfd_remove_cancel() argument
120 if (ctx->might_cancel) { in __timerfd_remove_cancel()
121 ctx->might_cancel = false; in __timerfd_remove_cancel()
123 list_del_rcu(&ctx->clist); in __timerfd_remove_cancel()
128 static void timerfd_remove_cancel(struct timerfd_ctx *ctx) in timerfd_remove_cancel() argument
130 spin_lock(&ctx->cancel_lock); in timerfd_remove_cancel()
131 __timerfd_remove_cancel(ctx); in timerfd_remove_cancel()
132 spin_unlock(&ctx->cancel_lock); in timerfd_remove_cancel()
135 static bool timerfd_canceled(struct timerfd_ctx *ctx) in timerfd_canceled() argument
137 if (!ctx->might_cancel || ctx->moffs != KTIME_MAX) in timerfd_canceled()
139 ctx->moffs = ktime_mono_to_real(0); in timerfd_canceled()
143 static void timerfd_setup_cancel(struct timerfd_ctx *ctx, int flags) in timerfd_setup_cancel() argument
145 spin_lock(&ctx->cancel_lock); in timerfd_setup_cancel()
146 if ((ctx->clockid == CLOCK_REALTIME || in timerfd_setup_cancel()
147 ctx->clockid == CLOCK_REALTIME_ALARM) && in timerfd_setup_cancel()
149 if (!ctx->might_cancel) { in timerfd_setup_cancel()
150 ctx->might_cancel = true; in timerfd_setup_cancel()
152 list_add_rcu(&ctx->clist, &cancel_list); in timerfd_setup_cancel()
156 __timerfd_remove_cancel(ctx); in timerfd_setup_cancel()
158 spin_unlock(&ctx->cancel_lock); in timerfd_setup_cancel()
161 static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx) in timerfd_get_remaining() argument
165 if (isalarm(ctx)) in timerfd_get_remaining()
166 remaining = alarm_expires_remaining(&ctx->t.alarm); in timerfd_get_remaining()
168 remaining = hrtimer_expires_remaining_adjusted(&ctx->t.tmr); in timerfd_get_remaining()
173 static int timerfd_setup(struct timerfd_ctx *ctx, int flags, in timerfd_setup() argument
178 int clockid = ctx->clockid; in timerfd_setup()
184 ctx->expired = 0; in timerfd_setup()
185 ctx->ticks = 0; in timerfd_setup()
186 ctx->tintv = timespec64_to_ktime(ktmr->it_interval); in timerfd_setup()
188 if (isalarm(ctx)) { in timerfd_setup()
189 alarm_init(&ctx->t.alarm, in timerfd_setup()
190 ctx->clockid == CLOCK_REALTIME_ALARM ? in timerfd_setup()
194 hrtimer_init(&ctx->t.tmr, clockid, htmode); in timerfd_setup()
195 hrtimer_set_expires(&ctx->t.tmr, texp); in timerfd_setup()
196 ctx->t.tmr.function = timerfd_tmrproc; in timerfd_setup()
202 if (isalarm(ctx)) { in timerfd_setup()
204 alarm_start(&ctx->t.alarm, texp); in timerfd_setup()
206 alarm_start_relative(&ctx->t.alarm, texp); in timerfd_setup()
208 hrtimer_start(&ctx->t.tmr, texp, htmode); in timerfd_setup()
211 if (timerfd_canceled(ctx)) in timerfd_setup()
215 ctx->settime_flags = flags & TFD_SETTIME_FLAGS; in timerfd_setup()
221 struct timerfd_ctx *ctx = file->private_data; in timerfd_release() local
223 timerfd_remove_cancel(ctx); in timerfd_release()
225 if (isalarm(ctx)) in timerfd_release()
226 alarm_cancel(&ctx->t.alarm); in timerfd_release()
228 hrtimer_cancel(&ctx->t.tmr); in timerfd_release()
229 kfree_rcu(ctx, rcu); in timerfd_release()
235 struct timerfd_ctx *ctx = file->private_data; in timerfd_poll() local
239 poll_wait(file, &ctx->wqh, wait); in timerfd_poll()
241 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_poll()
242 if (ctx->ticks) in timerfd_poll()
244 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_poll()
252 struct timerfd_ctx *ctx = file->private_data; in timerfd_read() local
258 spin_lock_irq(&ctx->wqh.lock); in timerfd_read()
262 res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks); in timerfd_read()
269 if (timerfd_canceled(ctx)) { in timerfd_read()
270 ctx->ticks = 0; in timerfd_read()
271 ctx->expired = 0; in timerfd_read()
275 if (ctx->ticks) { in timerfd_read()
276 ticks = ctx->ticks; in timerfd_read()
278 if (ctx->expired && ctx->tintv) { in timerfd_read()
285 if (isalarm(ctx)) { in timerfd_read()
287 &ctx->t.alarm, ctx->tintv) - 1; in timerfd_read()
288 alarm_restart(&ctx->t.alarm); in timerfd_read()
290 ticks += hrtimer_forward_now(&ctx->t.tmr, in timerfd_read()
291 ctx->tintv) - 1; in timerfd_read()
292 hrtimer_restart(&ctx->t.tmr); in timerfd_read()
295 ctx->expired = 0; in timerfd_read()
296 ctx->ticks = 0; in timerfd_read()
298 spin_unlock_irq(&ctx->wqh.lock); in timerfd_read()
307 struct timerfd_ctx *ctx = file->private_data; in timerfd_show() local
310 spin_lock_irq(&ctx->wqh.lock); in timerfd_show()
311 value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in timerfd_show()
312 interval = ktime_to_timespec64(ctx->tintv); in timerfd_show()
313 spin_unlock_irq(&ctx->wqh.lock); in timerfd_show()
321 ctx->clockid, in timerfd_show()
322 (unsigned long long)ctx->ticks, in timerfd_show()
323 ctx->settime_flags, in timerfd_show()
336 struct timerfd_ctx *ctx = file->private_data; in timerfd_ioctl() local
348 spin_lock_irq(&ctx->wqh.lock); in timerfd_ioctl()
349 if (!timerfd_canceled(ctx)) { in timerfd_ioctl()
350 ctx->ticks = ticks; in timerfd_ioctl()
351 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_ioctl()
354 spin_unlock_irq(&ctx->wqh.lock); in timerfd_ioctl()
393 struct timerfd_ctx *ctx; in SYSCALL_DEFINE2() local
412 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); in SYSCALL_DEFINE2()
413 if (!ctx) in SYSCALL_DEFINE2()
416 init_waitqueue_head(&ctx->wqh); in SYSCALL_DEFINE2()
417 spin_lock_init(&ctx->cancel_lock); in SYSCALL_DEFINE2()
418 ctx->clockid = clockid; in SYSCALL_DEFINE2()
420 if (isalarm(ctx)) in SYSCALL_DEFINE2()
421 alarm_init(&ctx->t.alarm, in SYSCALL_DEFINE2()
422 ctx->clockid == CLOCK_REALTIME_ALARM ? in SYSCALL_DEFINE2()
426 hrtimer_init(&ctx->t.tmr, clockid, HRTIMER_MODE_ABS); in SYSCALL_DEFINE2()
428 ctx->moffs = ktime_mono_to_real(0); in SYSCALL_DEFINE2()
430 ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx, in SYSCALL_DEFINE2()
433 kfree(ctx); in SYSCALL_DEFINE2()
443 struct timerfd_ctx *ctx; in do_timerfd_settime() local
453 ctx = f.file->private_data; in do_timerfd_settime()
455 if (isalarm(ctx) && !capable(CAP_WAKE_ALARM)) { in do_timerfd_settime()
460 timerfd_setup_cancel(ctx, flags); in do_timerfd_settime()
467 spin_lock_irq(&ctx->wqh.lock); in do_timerfd_settime()
469 if (isalarm(ctx)) { in do_timerfd_settime()
470 if (alarm_try_to_cancel(&ctx->t.alarm) >= 0) in do_timerfd_settime()
473 if (hrtimer_try_to_cancel(&ctx->t.tmr) >= 0) in do_timerfd_settime()
476 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_settime()
478 if (isalarm(ctx)) in do_timerfd_settime()
479 hrtimer_cancel_wait_running(&ctx->t.alarm.timer); in do_timerfd_settime()
481 hrtimer_cancel_wait_running(&ctx->t.tmr); in do_timerfd_settime()
490 if (ctx->expired && ctx->tintv) { in do_timerfd_settime()
491 if (isalarm(ctx)) in do_timerfd_settime()
492 alarm_forward_now(&ctx->t.alarm, ctx->tintv); in do_timerfd_settime()
494 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv); in do_timerfd_settime()
497 old->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in do_timerfd_settime()
498 old->it_interval = ktime_to_timespec64(ctx->tintv); in do_timerfd_settime()
503 ret = timerfd_setup(ctx, flags, new); in do_timerfd_settime()
505 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_settime()
513 struct timerfd_ctx *ctx; in do_timerfd_gettime() local
517 ctx = f.file->private_data; in do_timerfd_gettime()
519 spin_lock_irq(&ctx->wqh.lock); in do_timerfd_gettime()
520 if (ctx->expired && ctx->tintv) { in do_timerfd_gettime()
521 ctx->expired = 0; in do_timerfd_gettime()
523 if (isalarm(ctx)) { in do_timerfd_gettime()
524 ctx->ticks += in do_timerfd_gettime()
526 &ctx->t.alarm, ctx->tintv) - 1; in do_timerfd_gettime()
527 alarm_restart(&ctx->t.alarm); in do_timerfd_gettime()
529 ctx->ticks += in do_timerfd_gettime()
530 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv) in do_timerfd_gettime()
532 hrtimer_restart(&ctx->t.tmr); in do_timerfd_gettime()
535 t->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in do_timerfd_gettime()
536 t->it_interval = ktime_to_timespec64(ctx->tintv); in do_timerfd_gettime()
537 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_gettime()