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Message-Id: <1430381584-26425-1-git-send-email-baolin.wang@linaro.org>
Date: Thu, 30 Apr 2015 16:13:04 +0800
From: Baolin Wang <baolin.wang@...aro.org>
To: tglx@...utronix.de
Cc: arnd@...db.de, linux-kernel@...r.kernel.org,
baolin.wang@...aro.org, y2038@...ts.linaro.org
Subject: [PATCH v2 06/15] posix-timers:Convert to the 64bit methods for the syscall function
This patch converts to the 64bit methods with timespec64/itimerspec64 type
for the syscall function, and changes the syscall implementation according to
the CONFIG_64BIT macro.
Also introduces some default functions with timespec64/itimerspec64 type
for the 64bit methods.
Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
kernel/time/posix-timers.c | 166 +++++++++++++++++++++++++++++++++++++-------
1 file changed, 141 insertions(+), 25 deletions(-)
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index 0db7f02..4c7c7d3 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -140,6 +140,7 @@ static int common_timer_del(struct k_itimer *timer);
static enum hrtimer_restart posix_timer_fn(struct hrtimer *data);
static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags);
+static struct k_clock *clockid_to_kclock(const clockid_t id);
#define lock_timer(tid, flags) \
({ struct k_itimer *__timr; \
@@ -513,6 +514,57 @@ static struct pid *good_sigevent(sigevent_t * event)
return task_pid(rtn);
}
+static int default_timer_get64(struct k_itimer *timr,
+ struct itimerspec64 *cur_setting64)
+{
+ struct itimerspec cur_setting;
+ struct k_clock *kc = clockid_to_kclock(timr->it_clock);
+
+ kc->timer_get(timr, &cur_setting);
+ return 0;
+}
+
+static int default_timer_set64(struct k_itimer *timr, int flags,
+ struct itimerspec64 *new_setting64,
+ struct itimerspec64 *old_setting64)
+{
+ struct k_clock *kc = clockid_to_kclock(timr->it_clock);
+ struct itimerspec new_setting, old_setting;
+
+ kc->timer_set(timr, flags, &new_setting, &old_setting);
+ return 0;
+}
+
+static int default_clock_set64(const clockid_t which_clock,
+ const struct timespec64 *tp64)
+{
+ struct k_clock *kc = clockid_to_kclock(which_clock);
+ struct timespec tp;
+
+ kc->clock_set(which_clock, &tp);
+ return 0;
+}
+
+static int default_clock_get64(const clockid_t which_clock,
+ struct timespec64 *tp64)
+{
+ struct k_clock *kc = clockid_to_kclock(which_clock);
+ struct timespec tp;
+
+ kc->clock_get(which_clock, &tp);
+ return 0;
+}
+
+static int default_clock_getres64(const clockid_t which_clock,
+ struct timespec64 *tp64)
+{
+ struct k_clock *kc = clockid_to_kclock(which_clock);
+ struct timespec tp;
+
+ kc->clock_getres(which_clock, &tp);
+ return 0;
+}
+
void posix_timers_register_clock(const clockid_t clock_id,
struct k_clock *new_clock)
{
@@ -522,17 +574,28 @@ void posix_timers_register_clock(const clockid_t clock_id,
return;
}
- if (!new_clock->clock_get) {
- printk(KERN_WARNING "POSIX clock id %d lacks clock_get()\n",
+ if (!new_clock->clock_get && !new_clock->clock_get64) {
+ printk(KERN_WARNING "POSIX clock id %d lacks clock_get() and clock_get64()\n",
clock_id);
return;
}
- if (!new_clock->clock_getres) {
- printk(KERN_WARNING "POSIX clock id %d lacks clock_getres()\n",
+ if (!new_clock->clock_getres && !new_clock->clock_getres64) {
+ printk(KERN_WARNING "POSIX clock id %d lacks clock_getres() and clock_getres64()\n",
clock_id);
return;
}
+ if (new_clock->timer_get && !new_clock->timer_get64)
+ new_clock->timer_get64 = default_timer_get64;
+ if (new_clock->timer_set && !new_clock->timer_set64)
+ new_clock->timer_set64 = default_timer_set64;
+ if (new_clock->clock_set && !new_clock->clock_set64)
+ new_clock->clock_set64 = default_clock_set64;
+ if (new_clock->clock_get && !new_clock->clock_get64)
+ new_clock->clock_get64 = default_clock_get64;
+ if (new_clock->clock_getres && !new_clock->clock_getres64)
+ new_clock->clock_getres64 = default_clock_getres64;
+
posix_clocks[clock_id] = *new_clock;
}
EXPORT_SYMBOL_GPL(posix_timers_register_clock);
@@ -579,7 +642,8 @@ static struct k_clock *clockid_to_kclock(const clockid_t id)
return (id & CLOCKFD_MASK) == CLOCKFD ?
&clock_posix_dynamic : &clock_posix_cpu;
- if (id >= MAX_CLOCKS || !posix_clocks[id].clock_getres)
+ if (id >= MAX_CLOCKS || (!posix_clocks[id].clock_getres
+ && !posix_clocks[id].clock_getres64))
return NULL;
return &posix_clocks[id];
}
@@ -766,7 +830,7 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting)
cur_setting->it_value = ktime_to_timespec(remaining);
}
-static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting)
+static int __timer_gettime(timer_t timer_id, struct itimerspec64 *cur_setting)
{
struct k_itimer *timr;
struct k_clock *kc;
@@ -778,10 +842,10 @@ static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting)
return -EINVAL;
kc = clockid_to_kclock(timr->it_clock);
- if (WARN_ON_ONCE(!kc || !kc->timer_get))
+ if (WARN_ON_ONCE(!kc || !kc->timer_get64))
ret = -EINVAL;
else
- kc->timer_get(timr, cur_setting);
+ kc->timer_get64(timr, cur_setting);
unlock_timer(timr, flags);
return ret;
@@ -791,8 +855,17 @@ static int __timer_gettime(timer_t timer_id, struct itimerspec *cur_setting)
SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
struct itimerspec __user *, setting)
{
- struct itimerspec cur_setting;
+#ifdef CONFIG_64BIT
+ struct itimerspec64 cur_setting;
int ret = __timer_gettime(timer_id, &cur_setting);
+#else
+ struct itimerspec64 cur_setting64;
+ struct itimerspec cur_setting;
+ int ret = __timer_gettime(timer_id, &cur_setting64);
+
+ if (!ret)
+ cur_setting = itimerspec64_to_itimerspec(&cur_setting64);
+#endif
if (!ret && copy_to_user(setting, &cur_setting, sizeof (cur_setting)))
return -EFAULT;
@@ -876,8 +949,8 @@ common_timer_set(struct k_itimer *timr, int flags,
return 0;
}
-static int __timer_settime(timer_t timer_id, int flags, struct itimerspec *new_spec,
- struct itimerspec *old_spec)
+static int __timer_settime(timer_t timer_id, int flags, struct itimerspec64 *new_spec,
+ struct itimerspec64 *old_spec)
{
struct k_itimer *timr;
int error = 0;
@@ -890,10 +963,10 @@ retry:
return -EINVAL;
kc = clockid_to_kclock(timr->it_clock);
- if (WARN_ON_ONCE(!kc || !kc->timer_set))
+ if (WARN_ON_ONCE(!kc || !kc->timer_set64))
error = -EINVAL;
else
- error = kc->timer_set(timr, flags, new_spec, old_spec);
+ error = kc->timer_set64(timr, flags, new_spec, old_spec);
unlock_timer(timr, flag);
if (error == TIMER_RETRY) {
@@ -909,9 +982,16 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
const struct itimerspec __user *, new_setting,
struct itimerspec __user *, old_setting)
{
- struct itimerspec new_spec, old_spec;
int error = 0;
+#ifdef CONFIG_64BIT
+ struct itimerspec64 new_spec, old_spec;
+ struct itimerspec64 *rtn = old_setting ? &old_spec : NULL;
+#else
+ struct itimerspec new_spec, old_spec;
struct itimerspec *rtn = old_setting ? &old_spec : NULL;
+ struct itimerspec64 new_spec64;
+ struct itimerspec64 *rtn64;
+#endif
if (!new_setting)
return -EINVAL;
@@ -923,7 +1003,17 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
!timespec_valid(&new_spec.it_value))
return -EINVAL;
+#ifdef CONFIG_64BIT
error = __timer_settime(timer_id, flags, &new_spec, rtn);
+#else
+ new_spec64 = itimerspec_to_itimerspec64(&new_spec);
+ if (rtn)
+ *rtn64 = itimerspec_to_itimerspec64(rtn);
+ else
+ rtn64 = NULL;
+
+ error = __timer_settime(timer_id, flags, &new_spec64, rtn64);
+#endif
if (old_setting && !error &&
copy_to_user(old_setting, &old_spec, sizeof (old_spec)))
@@ -1019,44 +1109,62 @@ void exit_itimers(struct signal_struct *sig)
}
}
-static int __clock_settime(clockid_t which_clock, struct timespec *ts)
+static int __clock_settime(clockid_t which_clock, struct timespec64 *ts)
{
struct k_clock *kc = clockid_to_kclock(which_clock);
- if (!kc || !kc->clock_set)
+ if (!kc || !kc->clock_set64)
return -EINVAL;
- return kc->clock_set(which_clock, ts);
+ return kc->clock_set64(which_clock, ts);
}
SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
const struct timespec __user *, tp)
{
+#ifdef CONFIG_64BIT
+ struct timespec64 new_tp;
+#else
struct timespec new_tp;
+ struct timespec64 new_tp64;
+#endif
if (copy_from_user(&new_tp, tp, sizeof (*tp)))
return -EFAULT;
+#ifdef CONFIG_64BIT
return __clock_settime(which_clock, &new_tp);
+#else
+ new_tp64 = timespec_to_timespec64(new_tp);
+ return __clock_settime(which_clock, &new_tp64);
+#endif
}
-static int __clock_gettime(clockid_t which_clock, struct timespec *ts)
+static int __clock_gettime(clockid_t which_clock, struct timespec64 *ts)
{
struct k_clock *kc = clockid_to_kclock(which_clock);
if (!kc)
return -EINVAL;
- return kc->clock_get(which_clock, ts);
+ return kc->clock_get64(which_clock, ts);
}
SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
struct timespec __user *,tp)
{
- struct timespec kernel_tp;
int error;
-
+#ifdef CONFIG_64BIT
+ struct timespec64 kernel_tp;
error = __clock_gettime(which_clock, &kernel_tp);
+#else
+ struct timespec64 kernel_tp64;
+ struct timespec kernel_tp;
+
+ error = __clock_gettime(which_clock, &kernel_tp64);
+ if (!error)
+ kernel_tp = timespec64_to_timespec(kernel_tp64);
+#endif
if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp)))
error = -EFAULT;
@@ -1087,23 +1195,31 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock,
return err;
}
-static int __clock_getres(clockid_t which_clock, struct timespec *ts)
+static int __clock_getres(clockid_t which_clock, struct timespec64 *ts)
{
struct k_clock *kc = clockid_to_kclock(which_clock);
if (!kc)
return -EINVAL;
- return kc->clock_getres(which_clock, ts);
+ return kc->clock_getres64(which_clock, ts);
}
SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
struct timespec __user *, tp)
{
- struct timespec rtn_tp;
int error;
-
+#ifdef CONFIG_64BIT
+ struct timespec64 rtn_tp;
error = __clock_getres(which_clock, &rtn_tp);
+#else
+ struct timespec64 rtn_tp64;
+ struct timespec rtn_tp;
+
+ error = __clock_getres(which_clock, &rtn_tp64);
+ if (!error)
+ rtn_tp = timespec64_to_timespec(rtn_tp64);
+#endif
if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp)))
error = -EFAULT;
--
1.7.9.5
--
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