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time: introduce {get,put}_itimerspec64

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As we change the user space type for the timerfd and posix timer
functions to newer data types, we need some form of conversion
helpers to avoid duplicating that logic.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Deepa Dinamani 2017-06-24 11:45:03 -07:00 • committed by Al Viro
parent f59dd9c886
commit d5b7ffbfbd
5 changed files with 68 additions and 1 deletions
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13
include/linux/time.h
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@ -12,6 +12,10 @@ int get_timespec64(struct timespec64 *ts,
const struct timespec __user *uts);
int put_timespec64(const struct timespec64 *ts,
struct timespec __user *uts);
int get_itimerspec64(struct itimerspec64 *it,
const struct itimerspec __user *uit);
int put_itimerspec64(const struct itimerspec64 *it,
struct itimerspec __user *uit);
#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
@ -275,4 +279,13 @@ static __always_inline void timespec_add_ns(struct timespec *a, u64 ns)
a->tv_nsec = ns;
}
static inline bool itimerspec64_valid(const struct itimerspec64 *its)
{
if (!timespec64_valid(&(its->it_interval)) ||
!timespec64_valid(&(its->it_value)))
return false;
return true;
}
#endif