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posix-timers: Move compat versions of clock_gettime/settime/getres

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Move them to the native implementations and get rid of the set_fs() hackery.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170607084241.28657-13-viro@ZenIV.linux.org.uk
This commit is contained in:
Al Viro
2017-06-07 09:42:38 +01:00
committed by Thomas Gleixner
parent 54ad9c46c2
commit d822cdcce4
3 changed files with 115 additions and 55 deletions
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53
kernel/time/posix-stubs.c
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@@ -137,6 +137,59 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
struct compat_timespec __user *, tp)
{
struct timespec64 new_tp64;
struct timespec new_tp;
if (which_clock != CLOCK_REALTIME)
return -EINVAL;
if (compat_get_timespec(&new_tp, tp))
return -EFAULT;
new_tp64 = timespec_to_timespec64(new_tp);
return do_sys_settimeofday64(&new_tp64, NULL);
}
COMPAT_SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
struct compat_timespec __user *,tp)
{
struct timespec64 kernel_tp64;
struct timespec kernel_tp;
switch (which_clock) {
case CLOCK_REALTIME: ktime_get_real_ts64(&kernel_tp64); break;
case CLOCK_MONOTONIC: ktime_get_ts64(&kernel_tp64); break;
case CLOCK_BOOTTIME: get_monotonic_boottime64(&kernel_tp64); break;
default: return -EINVAL;
}
kernel_tp = timespec64_to_timespec(kernel_tp64);
if (compat_put_timespec(&kernel_tp, tp))
return -EFAULT;
return 0;
}
COMPAT_SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
struct compat_timespec __user *, tp)
{
struct timespec rtn_tp = {
.tv_sec = 0,
.tv_nsec = hrtimer_resolution,
};
switch (which_clock) {
case CLOCK_REALTIME:
case CLOCK_MONOTONIC:
case CLOCK_BOOTTIME:
if (compat_put_timespec(&rtn_tp, tp))
return -EFAULT;
return 0;
default:
return -EINVAL;
}
}
COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
struct compat_timespec __user *, rqtp,
struct compat_timespec __user *, rmtp)