#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/kernel.h>
+#include <linux/slab.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/time.h>
static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx)
{
- ktime_t now, remaining;
-
- now = ctx->tmr.base->get_time();
- remaining = ktime_sub(ctx->tmr.expires, now);
+ ktime_t remaining;
+ remaining = hrtimer_expires_remaining(&ctx->tmr);
return remaining.tv64 < 0 ? ktime_set(0, 0): remaining;
}
ctx->ticks = 0;
ctx->tintv = timespec_to_ktime(ktmr->it_interval);
hrtimer_init(&ctx->tmr, ctx->clockid, htmode);
- ctx->tmr.expires = texp;
+ hrtimer_set_expires(&ctx->tmr, texp);
ctx->tmr.function = timerfd_tmrproc;
if (texp.tv64 != 0)
hrtimer_start(&ctx->tmr, texp, htmode);
struct timerfd_ctx *ctx = file->private_data;
ssize_t res;
u64 ticks = 0;
- DECLARE_WAITQUEUE(wait, current);
if (count < sizeof(ticks))
return -EINVAL;
spin_lock_irq(&ctx->wqh.lock);
- res = -EAGAIN;
- if (!ctx->ticks && !(file->f_flags & O_NONBLOCK)) {
- __add_wait_queue(&ctx->wqh, &wait);
- for (res = 0;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (ctx->ticks) {
- res = 0;
- break;
- }
- if (signal_pending(current)) {
- res = -ERESTARTSYS;
- break;
- }
- spin_unlock_irq(&ctx->wqh.lock);
- schedule();
- spin_lock_irq(&ctx->wqh.lock);
- }
- __remove_wait_queue(&ctx->wqh, &wait);
- __set_current_state(TASK_RUNNING);
- }
+ if (file->f_flags & O_NONBLOCK)
+ res = -EAGAIN;
+ else
+ res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks);
if (ctx->ticks) {
ticks = ctx->ticks;
if (ctx->expired && ctx->tintv.tv64) {
return file;
}
-asmlinkage long sys_timerfd_create(int clockid, int flags)
+SYSCALL_DEFINE2(timerfd_create, int, clockid, int, flags)
{
int ufd;
struct timerfd_ctx *ctx;
- if (flags)
- return -EINVAL;
- if (clockid != CLOCK_MONOTONIC &&
- clockid != CLOCK_REALTIME)
+ /* Check the TFD_* constants for consistency. */
+ BUILD_BUG_ON(TFD_CLOEXEC != O_CLOEXEC);
+ BUILD_BUG_ON(TFD_NONBLOCK != O_NONBLOCK);
+
+ if ((flags & ~TFD_CREATE_FLAGS) ||
+ (clockid != CLOCK_MONOTONIC &&
+ clockid != CLOCK_REALTIME))
return -EINVAL;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
ctx->clockid = clockid;
hrtimer_init(&ctx->tmr, clockid, HRTIMER_MODE_ABS);
- ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx, 0);
+ ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx,
+ O_RDWR | (flags & TFD_SHARED_FCNTL_FLAGS));
if (ufd < 0)
kfree(ctx);
return ufd;
}
-asmlinkage long sys_timerfd_settime(int ufd, int flags,
- const struct itimerspec __user *utmr,
- struct itimerspec __user *otmr)
+SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
+ const struct itimerspec __user *, utmr,
+ struct itimerspec __user *, otmr)
{
struct file *file;
struct timerfd_ctx *ctx;
if (copy_from_user(&ktmr, utmr, sizeof(ktmr)))
return -EFAULT;
- if (!timespec_valid(&ktmr.it_value) ||
+ if ((flags & ~TFD_SETTIME_FLAGS) ||
+ !timespec_valid(&ktmr.it_value) ||
!timespec_valid(&ktmr.it_interval))
return -EINVAL;
return 0;
}
-asmlinkage long sys_timerfd_gettime(int ufd, struct itimerspec __user *otmr)
+SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct itimerspec __user *, otmr)
{
struct file *file;
struct timerfd_ctx *ctx;