short unsigned settime_flags; /* to show in fdinfo */
struct rcu_head rcu;
struct list_head clist;
+ spinlock_t cancel_lock;
bool might_cancel;
};
/*
* This gets called when the timer event triggers. We set the "expired"
* flag, but we do not re-arm the timer (in case it's necessary,
- * tintv.tv64 != 0) until the timer is accessed.
+ * tintv != 0) until the timer is accessed.
*/
static void timerfd_triggered(struct timerfd_ctx *ctx)
{
*/
void timerfd_clock_was_set(void)
{
- ktime_t moffs = ktime_mono_to_real((ktime_t){ .tv64 = 0 });
+ ktime_t moffs = ktime_mono_to_real(0);
struct timerfd_ctx *ctx;
unsigned long flags;
if (!ctx->might_cancel)
continue;
spin_lock_irqsave(&ctx->wqh.lock, flags);
- if (ctx->moffs.tv64 != moffs.tv64) {
- ctx->moffs.tv64 = KTIME_MAX;
+ if (ctx->moffs != moffs) {
+ ctx->moffs = KTIME_MAX;
ctx->ticks++;
wake_up_locked(&ctx->wqh);
}
rcu_read_unlock();
}
-static void timerfd_remove_cancel(struct timerfd_ctx *ctx)
+static void __timerfd_remove_cancel(struct timerfd_ctx *ctx)
{
if (ctx->might_cancel) {
ctx->might_cancel = false;
}
}
+static void timerfd_remove_cancel(struct timerfd_ctx *ctx)
+{
+ spin_lock(&ctx->cancel_lock);
+ __timerfd_remove_cancel(ctx);
+ spin_unlock(&ctx->cancel_lock);
+}
+
static bool timerfd_canceled(struct timerfd_ctx *ctx)
{
- if (!ctx->might_cancel || ctx->moffs.tv64 != KTIME_MAX)
+ if (!ctx->might_cancel || ctx->moffs != KTIME_MAX)
return false;
- ctx->moffs = ktime_mono_to_real((ktime_t){ .tv64 = 0 });
+ ctx->moffs = ktime_mono_to_real(0);
return true;
}
static void timerfd_setup_cancel(struct timerfd_ctx *ctx, int flags)
{
+ spin_lock(&ctx->cancel_lock);
if ((ctx->clockid == CLOCK_REALTIME ||
ctx->clockid == CLOCK_REALTIME_ALARM) &&
(flags & TFD_TIMER_ABSTIME) && (flags & TFD_TIMER_CANCEL_ON_SET)) {
list_add_rcu(&ctx->clist, &cancel_list);
spin_unlock(&cancel_lock);
}
- } else if (ctx->might_cancel) {
- timerfd_remove_cancel(ctx);
+ } else {
+ __timerfd_remove_cancel(ctx);
}
+ spin_unlock(&ctx->cancel_lock);
}
static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx)
else
remaining = hrtimer_expires_remaining_adjusted(&ctx->t.tmr);
- return remaining.tv64 < 0 ? ktime_set(0, 0): remaining;
+ return remaining < 0 ? 0: remaining;
}
static int timerfd_setup(struct timerfd_ctx *ctx, int flags,
ctx->t.tmr.function = timerfd_tmrproc;
}
- if (texp.tv64 != 0) {
+ if (texp != 0) {
if (isalarm(ctx)) {
if (flags & TFD_TIMER_ABSTIME)
alarm_start(&ctx->t.alarm, texp);
if (ctx->ticks) {
ticks = ctx->ticks;
- if (ctx->expired && ctx->tintv.tv64) {
+ if (ctx->expired && ctx->tintv) {
/*
- * If tintv.tv64 != 0, this is a periodic timer that
+ * If tintv != 0, this is a periodic timer that
* needs to be re-armed. We avoid doing it in the timer
* callback to avoid DoS attacks specifying a very
* short timer period.
return -ENOMEM;
init_waitqueue_head(&ctx->wqh);
+ spin_lock_init(&ctx->cancel_lock);
ctx->clockid = clockid;
if (isalarm(ctx))
else
hrtimer_init(&ctx->t.tmr, clockid, HRTIMER_MODE_ABS);
- ctx->moffs = ktime_mono_to_real((ktime_t){ .tv64 = 0 });
+ ctx->moffs = ktime_mono_to_real(0);
ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx,
O_RDWR | (flags & TFD_SHARED_FCNTL_FLAGS));
* We do not update "ticks" and "expired" since the timer will be
* re-programmed again in the following timerfd_setup() call.
*/
- if (ctx->expired && ctx->tintv.tv64) {
+ if (ctx->expired && ctx->tintv) {
if (isalarm(ctx))
alarm_forward_now(&ctx->t.alarm, ctx->tintv);
else
ctx = f.file->private_data;
spin_lock_irq(&ctx->wqh.lock);
- if (ctx->expired && ctx->tintv.tv64) {
+ if (ctx->expired && ctx->tintv) {
ctx->expired = 0;
if (isalarm(ctx)) {