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-rw-r--r--kernel/time/posix-timers.c89
1 files changed, 44 insertions, 45 deletions
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index e08ce3f27447..4b9127e95430 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -86,15 +86,6 @@ static const struct k_clock clock_realtime, clock_monotonic;
#endif
/*
- * parisc wants ENOTSUP instead of EOPNOTSUPP
- */
-#ifndef ENOTSUP
-# define ENANOSLEEP_NOTSUP EOPNOTSUPP
-#else
-# define ENANOSLEEP_NOTSUP ENOTSUP
-#endif
-
-/*
* The timer ID is turned into a timer address by idr_find().
* Verifying a valid ID consists of:
*
@@ -228,21 +219,21 @@ static int posix_ktime_get_ts(clockid_t which_clock, struct timespec64 *tp)
*/
static int posix_get_monotonic_raw(clockid_t which_clock, struct timespec64 *tp)
{
- getrawmonotonic64(tp);
+ ktime_get_raw_ts64(tp);
return 0;
}
static int posix_get_realtime_coarse(clockid_t which_clock, struct timespec64 *tp)
{
- *tp = current_kernel_time64();
+ ktime_get_coarse_real_ts64(tp);
return 0;
}
static int posix_get_monotonic_coarse(clockid_t which_clock,
struct timespec64 *tp)
{
- *tp = get_monotonic_coarse64();
+ ktime_get_coarse_ts64(tp);
return 0;
}
@@ -254,13 +245,13 @@ static int posix_get_coarse_res(const clockid_t which_clock, struct timespec64 *
static int posix_get_boottime(const clockid_t which_clock, struct timespec64 *tp)
{
- get_monotonic_boottime64(tp);
+ ktime_get_boottime_ts64(tp);
return 0;
}
static int posix_get_tai(clockid_t which_clock, struct timespec64 *tp)
{
- timekeeping_clocktai64(tp);
+ ktime_get_clocktai_ts64(tp);
return 0;
}
@@ -283,6 +274,17 @@ static __init int init_posix_timers(void)
}
__initcall(init_posix_timers);
+/*
+ * The siginfo si_overrun field and the return value of timer_getoverrun(2)
+ * are of type int. Clamp the overrun value to INT_MAX
+ */
+static inline int timer_overrun_to_int(struct k_itimer *timr, int baseval)
+{
+ s64 sum = timr->it_overrun_last + (s64)baseval;
+
+ return sum > (s64)INT_MAX ? INT_MAX : (int)sum;
+}
+
static void common_hrtimer_rearm(struct k_itimer *timr)
{
struct hrtimer *timer = &timr->it.real.timer;
@@ -290,9 +292,8 @@ static void common_hrtimer_rearm(struct k_itimer *timr)
if (!timr->it_interval)
return;
- timr->it_overrun += (unsigned int) hrtimer_forward(timer,
- timer->base->get_time(),
- timr->it_interval);
+ timr->it_overrun += hrtimer_forward(timer, timer->base->get_time(),
+ timr->it_interval);
hrtimer_restart(timer);
}
@@ -321,10 +322,10 @@ void posixtimer_rearm(struct siginfo *info)
timr->it_active = 1;
timr->it_overrun_last = timr->it_overrun;
- timr->it_overrun = -1;
+ timr->it_overrun = -1LL;
++timr->it_requeue_pending;
- info->si_overrun += timr->it_overrun_last;
+ info->si_overrun = timer_overrun_to_int(timr, info->si_overrun);
}
unlock_timer(timr, flags);
@@ -332,8 +333,8 @@ void posixtimer_rearm(struct siginfo *info)
int posix_timer_event(struct k_itimer *timr, int si_private)
{
- struct task_struct *task;
- int shared, ret = -1;
+ enum pid_type type;
+ int ret = -1;
/*
* FIXME: if ->sigq is queued we can race with
* dequeue_signal()->posixtimer_rearm().
@@ -347,13 +348,8 @@ int posix_timer_event(struct k_itimer *timr, int si_private)
*/
timr->sigq->info.si_sys_private = si_private;
- rcu_read_lock();
- task = pid_task(timr->it_pid, PIDTYPE_PID);
- if (task) {
- shared = !(timr->it_sigev_notify & SIGEV_THREAD_ID);
- ret = send_sigqueue(timr->sigq, task, shared);
- }
- rcu_read_unlock();
+ type = !(timr->it_sigev_notify & SIGEV_THREAD_ID) ? PIDTYPE_TGID : PIDTYPE_PID;
+ ret = send_sigqueue(timr->sigq, timr->it_pid, type);
/* If we failed to send the signal the timer stops. */
return ret > 0;
}
@@ -418,9 +414,8 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer)
now = ktime_add(now, kj);
}
#endif
- timr->it_overrun += (unsigned int)
- hrtimer_forward(timer, now,
- timr->it_interval);
+ timr->it_overrun += hrtimer_forward(timer, now,
+ timr->it_interval);
ret = HRTIMER_RESTART;
++timr->it_requeue_pending;
timr->it_active = 1;
@@ -433,11 +428,13 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer)
static struct pid *good_sigevent(sigevent_t * event)
{
- struct task_struct *rtn = current->group_leader;
+ struct pid *pid = task_tgid(current);
+ struct task_struct *rtn;
switch (event->sigev_notify) {
case SIGEV_SIGNAL | SIGEV_THREAD_ID:
- rtn = find_task_by_vpid(event->sigev_notify_thread_id);
+ pid = find_vpid(event->sigev_notify_thread_id);
+ rtn = pid_task(pid, PIDTYPE_PID);
if (!rtn || !same_thread_group(rtn, current))
return NULL;
/* FALLTHRU */
@@ -447,7 +444,7 @@ static struct pid *good_sigevent(sigevent_t * event)
return NULL;
/* FALLTHRU */
case SIGEV_NONE:
- return task_pid(rtn);
+ return pid;
default:
return NULL;
}
@@ -524,7 +521,7 @@ static int do_timer_create(clockid_t which_clock, struct sigevent *event,
new_timer->it_id = (timer_t) new_timer_id;
new_timer->it_clock = which_clock;
new_timer->kclock = kc;
- new_timer->it_overrun = -1;
+ new_timer->it_overrun = -1LL;
if (event) {
rcu_read_lock();
@@ -645,11 +642,11 @@ static ktime_t common_hrtimer_remaining(struct k_itimer *timr, ktime_t now)
return __hrtimer_expires_remaining_adjusted(timer, now);
}
-static int common_hrtimer_forward(struct k_itimer *timr, ktime_t now)
+static s64 common_hrtimer_forward(struct k_itimer *timr, ktime_t now)
{
struct hrtimer *timer = &timr->it.real.timer;
- return (int)hrtimer_forward(timer, now, timr->it_interval);
+ return hrtimer_forward(timer, now, timr->it_interval);
}
/*
@@ -743,7 +740,7 @@ static int do_timer_gettime(timer_t timer_id, struct itimerspec64 *setting)
/* Get the time remaining on a POSIX.1b interval timer. */
SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
- struct itimerspec __user *, setting)
+ struct __kernel_itimerspec __user *, setting)
{
struct itimerspec64 cur_setting;
@@ -755,7 +752,8 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
return ret;
}
-#ifdef CONFIG_COMPAT
+#ifdef CONFIG_COMPAT_32BIT_TIME
+
COMPAT_SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
struct compat_itimerspec __user *, setting)
{
@@ -768,6 +766,7 @@ COMPAT_SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
}
return ret;
}
+
#endif
/*
@@ -789,7 +788,7 @@ SYSCALL_DEFINE1(timer_getoverrun, timer_t, timer_id)
if (!timr)
return -EINVAL;
- overrun = timr->it_overrun_last;
+ overrun = timer_overrun_to_int(timr, 0);
unlock_timer(timr, flags);
return overrun;
@@ -906,8 +905,8 @@ retry:
/* Set a POSIX.1b interval timer */
SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
- const struct itimerspec __user *, new_setting,
- struct itimerspec __user *, old_setting)
+ const struct __kernel_itimerspec __user *, new_setting,
+ struct __kernel_itimerspec __user *, old_setting)
{
struct itimerspec64 new_spec, old_spec;
struct itimerspec64 *rtn = old_setting ? &old_spec : NULL;
@@ -927,7 +926,7 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
return error;
}
-#ifdef CONFIG_COMPAT
+#ifdef CONFIG_COMPAT_32BIT_TIME
COMPAT_SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
struct compat_itimerspec __user *, new,
struct compat_itimerspec __user *, old)
@@ -1220,7 +1219,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
if (!kc)
return -EINVAL;
if (!kc->nsleep)
- return -ENANOSLEEP_NOTSUP;
+ return -EOPNOTSUPP;
if (get_timespec64(&t, rqtp))
return -EFAULT;
@@ -1247,7 +1246,7 @@ COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
if (!kc)
return -EINVAL;
if (!kc->nsleep)
- return -ENANOSLEEP_NOTSUP;
+ return -EOPNOTSUPP;
if (compat_get_timespec64(&t, rqtp))
return -EFAULT;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.