Lines Matching refs:ctx
51 static inline bool isalarm(struct timerfd_ctx *ctx) in isalarm() argument
53 return ctx->clockid == CLOCK_REALTIME_ALARM || in isalarm()
54 ctx->clockid == CLOCK_BOOTTIME_ALARM; in isalarm()
62 static void timerfd_triggered(struct timerfd_ctx *ctx) in timerfd_triggered() argument
66 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_triggered()
67 ctx->expired = 1; in timerfd_triggered()
68 ctx->ticks++; in timerfd_triggered()
69 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_triggered()
70 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_triggered()
75 struct timerfd_ctx *ctx = container_of(htmr, struct timerfd_ctx, in timerfd_tmrproc() local
77 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()
99 struct timerfd_ctx *ctx; in timerfd_clock_was_set() local
103 list_for_each_entry_rcu(ctx, &cancel_list, clist) { in timerfd_clock_was_set()
104 if (!ctx->might_cancel) in timerfd_clock_was_set()
106 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_clock_was_set()
107 if (ctx->moffs != moffs) { in timerfd_clock_was_set()
108 ctx->moffs = KTIME_MAX; in timerfd_clock_was_set()
109 ctx->ticks++; in timerfd_clock_was_set()
110 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_clock_was_set()
112 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_clock_was_set()
117 static void __timerfd_remove_cancel(struct timerfd_ctx *ctx) in __timerfd_remove_cancel() argument
119 if (ctx->might_cancel) { in __timerfd_remove_cancel()
120 ctx->might_cancel = false; in __timerfd_remove_cancel()
122 list_del_rcu(&ctx->clist); in __timerfd_remove_cancel()
127 static void timerfd_remove_cancel(struct timerfd_ctx *ctx) in timerfd_remove_cancel() argument
129 spin_lock(&ctx->cancel_lock); in timerfd_remove_cancel()
130 __timerfd_remove_cancel(ctx); in timerfd_remove_cancel()
131 spin_unlock(&ctx->cancel_lock); in timerfd_remove_cancel()
134 static bool timerfd_canceled(struct timerfd_ctx *ctx) in timerfd_canceled() argument
136 if (!ctx->might_cancel || ctx->moffs != KTIME_MAX) in timerfd_canceled()
138 ctx->moffs = ktime_mono_to_real(0); in timerfd_canceled()
142 static void timerfd_setup_cancel(struct timerfd_ctx *ctx, int flags) in timerfd_setup_cancel() argument
144 spin_lock(&ctx->cancel_lock); in timerfd_setup_cancel()
145 if ((ctx->clockid == CLOCK_REALTIME || in timerfd_setup_cancel()
146 ctx->clockid == CLOCK_REALTIME_ALARM) && in timerfd_setup_cancel()
148 if (!ctx->might_cancel) { in timerfd_setup_cancel()
149 ctx->might_cancel = true; in timerfd_setup_cancel()
151 list_add_rcu(&ctx->clist, &cancel_list); in timerfd_setup_cancel()
155 __timerfd_remove_cancel(ctx); in timerfd_setup_cancel()
157 spin_unlock(&ctx->cancel_lock); in timerfd_setup_cancel()
160 static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx) in timerfd_get_remaining() argument
164 if (isalarm(ctx)) in timerfd_get_remaining()
165 remaining = alarm_expires_remaining(&ctx->t.alarm); in timerfd_get_remaining()
167 remaining = hrtimer_expires_remaining_adjusted(&ctx->t.tmr); in timerfd_get_remaining()
172 static int timerfd_setup(struct timerfd_ctx *ctx, int flags, in timerfd_setup() argument
177 int clockid = ctx->clockid; in timerfd_setup()
183 ctx->expired = 0; in timerfd_setup()
184 ctx->ticks = 0; in timerfd_setup()
185 ctx->tintv = timespec64_to_ktime(ktmr->it_interval); in timerfd_setup()
187 if (isalarm(ctx)) { in timerfd_setup()
188 alarm_init(&ctx->t.alarm, in timerfd_setup()
189 ctx->clockid == CLOCK_REALTIME_ALARM ? in timerfd_setup()
193 hrtimer_init(&ctx->t.tmr, clockid, htmode); in timerfd_setup()
194 hrtimer_set_expires(&ctx->t.tmr, texp); in timerfd_setup()
195 ctx->t.tmr.function = timerfd_tmrproc; in timerfd_setup()
199 if (isalarm(ctx)) { in timerfd_setup()
201 alarm_start(&ctx->t.alarm, texp); in timerfd_setup()
203 alarm_start_relative(&ctx->t.alarm, texp); in timerfd_setup()
205 hrtimer_start(&ctx->t.tmr, texp, htmode); in timerfd_setup()
208 if (timerfd_canceled(ctx)) in timerfd_setup()
212 ctx->settime_flags = flags & TFD_SETTIME_FLAGS; in timerfd_setup()
218 struct timerfd_ctx *ctx = file->private_data; in timerfd_release() local
220 timerfd_remove_cancel(ctx); in timerfd_release()
222 if (isalarm(ctx)) in timerfd_release()
223 alarm_cancel(&ctx->t.alarm); in timerfd_release()
225 hrtimer_cancel(&ctx->t.tmr); in timerfd_release()
226 kfree_rcu(ctx, rcu); in timerfd_release()
232 struct timerfd_ctx *ctx = file->private_data; in timerfd_poll() local
236 poll_wait(file, &ctx->wqh, wait); in timerfd_poll()
238 spin_lock_irqsave(&ctx->wqh.lock, flags); in timerfd_poll()
239 if (ctx->ticks) in timerfd_poll()
241 spin_unlock_irqrestore(&ctx->wqh.lock, flags); in timerfd_poll()
249 struct timerfd_ctx *ctx = file->private_data; in timerfd_read() local
255 spin_lock_irq(&ctx->wqh.lock); in timerfd_read()
259 res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks); in timerfd_read()
266 if (timerfd_canceled(ctx)) { in timerfd_read()
267 ctx->ticks = 0; in timerfd_read()
268 ctx->expired = 0; in timerfd_read()
272 if (ctx->ticks) { in timerfd_read()
273 ticks = ctx->ticks; in timerfd_read()
275 if (ctx->expired && ctx->tintv) { in timerfd_read()
282 if (isalarm(ctx)) { in timerfd_read()
284 &ctx->t.alarm, ctx->tintv) - 1; in timerfd_read()
285 alarm_restart(&ctx->t.alarm); in timerfd_read()
287 ticks += hrtimer_forward_now(&ctx->t.tmr, in timerfd_read()
288 ctx->tintv) - 1; in timerfd_read()
289 hrtimer_restart(&ctx->t.tmr); in timerfd_read()
292 ctx->expired = 0; in timerfd_read()
293 ctx->ticks = 0; in timerfd_read()
295 spin_unlock_irq(&ctx->wqh.lock); in timerfd_read()
304 struct timerfd_ctx *ctx = file->private_data; in timerfd_show() local
307 spin_lock_irq(&ctx->wqh.lock); in timerfd_show()
308 t.it_value = ktime_to_timespec(timerfd_get_remaining(ctx)); in timerfd_show()
309 t.it_interval = ktime_to_timespec(ctx->tintv); in timerfd_show()
310 spin_unlock_irq(&ctx->wqh.lock); in timerfd_show()
318 ctx->clockid, in timerfd_show()
319 (unsigned long long)ctx->ticks, in timerfd_show()
320 ctx->settime_flags, in timerfd_show()
333 struct timerfd_ctx *ctx = file->private_data; in timerfd_ioctl() local
345 spin_lock_irq(&ctx->wqh.lock); in timerfd_ioctl()
346 if (!timerfd_canceled(ctx)) { in timerfd_ioctl()
347 ctx->ticks = ticks; in timerfd_ioctl()
348 wake_up_locked_poll(&ctx->wqh, EPOLLIN); in timerfd_ioctl()
351 spin_unlock_irq(&ctx->wqh.lock); in timerfd_ioctl()
390 struct timerfd_ctx *ctx; in SYSCALL_DEFINE2() local
409 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); in SYSCALL_DEFINE2()
410 if (!ctx) in SYSCALL_DEFINE2()
413 init_waitqueue_head(&ctx->wqh); in SYSCALL_DEFINE2()
414 spin_lock_init(&ctx->cancel_lock); in SYSCALL_DEFINE2()
415 ctx->clockid = clockid; in SYSCALL_DEFINE2()
417 if (isalarm(ctx)) in SYSCALL_DEFINE2()
418 alarm_init(&ctx->t.alarm, in SYSCALL_DEFINE2()
419 ctx->clockid == CLOCK_REALTIME_ALARM ? in SYSCALL_DEFINE2()
423 hrtimer_init(&ctx->t.tmr, clockid, HRTIMER_MODE_ABS); in SYSCALL_DEFINE2()
425 ctx->moffs = ktime_mono_to_real(0); in SYSCALL_DEFINE2()
427 ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx, in SYSCALL_DEFINE2()
430 kfree(ctx); in SYSCALL_DEFINE2()
440 struct timerfd_ctx *ctx; in do_timerfd_settime() local
450 ctx = f.file->private_data; in do_timerfd_settime()
452 if (isalarm(ctx) && !capable(CAP_WAKE_ALARM)) { in do_timerfd_settime()
457 timerfd_setup_cancel(ctx, flags); in do_timerfd_settime()
464 spin_lock_irq(&ctx->wqh.lock); in do_timerfd_settime()
466 if (isalarm(ctx)) { in do_timerfd_settime()
467 if (alarm_try_to_cancel(&ctx->t.alarm) >= 0) in do_timerfd_settime()
470 if (hrtimer_try_to_cancel(&ctx->t.tmr) >= 0) in do_timerfd_settime()
473 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_settime()
475 if (isalarm(ctx)) in do_timerfd_settime()
476 hrtimer_cancel_wait_running(&ctx->t.alarm.timer); in do_timerfd_settime()
478 hrtimer_cancel_wait_running(&ctx->t.tmr); in do_timerfd_settime()
487 if (ctx->expired && ctx->tintv) { in do_timerfd_settime()
488 if (isalarm(ctx)) in do_timerfd_settime()
489 alarm_forward_now(&ctx->t.alarm, ctx->tintv); in do_timerfd_settime()
491 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv); in do_timerfd_settime()
494 old->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in do_timerfd_settime()
495 old->it_interval = ktime_to_timespec64(ctx->tintv); in do_timerfd_settime()
500 ret = timerfd_setup(ctx, flags, new); in do_timerfd_settime()
502 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_settime()
510 struct timerfd_ctx *ctx; in do_timerfd_gettime() local
514 ctx = f.file->private_data; in do_timerfd_gettime()
516 spin_lock_irq(&ctx->wqh.lock); in do_timerfd_gettime()
517 if (ctx->expired && ctx->tintv) { in do_timerfd_gettime()
518 ctx->expired = 0; in do_timerfd_gettime()
520 if (isalarm(ctx)) { in do_timerfd_gettime()
521 ctx->ticks += in do_timerfd_gettime()
523 &ctx->t.alarm, ctx->tintv) - 1; in do_timerfd_gettime()
524 alarm_restart(&ctx->t.alarm); in do_timerfd_gettime()
526 ctx->ticks += in do_timerfd_gettime()
527 hrtimer_forward_now(&ctx->t.tmr, ctx->tintv) in do_timerfd_gettime()
529 hrtimer_restart(&ctx->t.tmr); in do_timerfd_gettime()
532 t->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx)); in do_timerfd_gettime()
533 t->it_interval = ktime_to_timespec64(ctx->tintv); in do_timerfd_gettime()
534 spin_unlock_irq(&ctx->wqh.lock); in do_timerfd_gettime()