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hrtimers: Prepare hrtimer_nanosleep() for time namespaces

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clock_nanosleep() accepts absolute values of expiration time when
TIMER_ABSTIME flag is set. This absolute value is inside the task's
time namespace, and has to be converted to the host's time.

There is timens_ktime_to_host() helper for converting time, but
it accepts ktime argument.

As a preparation, make hrtimer_nanosleep() accept a clock value in ktime
instead of timespec64.

Co-developed-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@openvz.org>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20191112012724.250792-17-dima@arista.com
This commit is contained in:
Andrei Vagin
2019-11-12 01:27:05 +00:00
committed by Thomas Gleixner
parent 0b9b9a3b16
commit ea2d1f7fce
5 changed files with 17 additions and 12 deletions
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4
kernel/time/posix-timers.c
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@@ -1221,7 +1221,9 @@ SYSCALL_DEFINE2(clock_getres_time32, clockid_t, which_clock,
static int common_nsleep(const clockid_t which_clock, int flags,
const struct timespec64 *rqtp)
{
return hrtimer_nanosleep(rqtp, flags & TIMER_ABSTIME ?
ktime_t texp = timespec64_to_ktime(*rqtp);
return hrtimer_nanosleep(texp, flags & TIMER_ABSTIME ?
HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
which_clock);
}