From: Andrei Vagin Date: Tue, 12 Nov 2019 01:27:03 +0000 (+0000) Subject: posix-timers: Make timer_settime() time namespace aware X-Git-Tag: v5.6-rc1~177^2~30 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7da8b3a44bb426a43670b3a97ed61085018a9d43;p=linux.git posix-timers: Make timer_settime() time namespace aware Wire timer_settime() syscall into time namespace virtualization. sys_timer_settime() calls the ktime->timer_set() callback. Right now, common_timer_set() is the only implementation for the callback. The user-supplied expiry value is converted from timespec64 to ktime and then timens_ktime_to_host() can be used to convert namespace's time to the host time. Inside a time namespace kernel's time differs by a fixed offset from a user-supplied time, but only absolute values (TIMER_ABSTIME) must be converted. Co-developed-by: Dmitry Safonov Signed-off-by: Andrei Vagin Signed-off-by: Dmitry Safonov Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/r/20191112012724.250792-15-dima@arista.com --- diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index d26b915b227a..473082b0b57f 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -885,6 +885,8 @@ int common_timer_set(struct k_itimer *timr, int flags, timr->it_interval = timespec64_to_ktime(new_setting->it_interval); expires = timespec64_to_ktime(new_setting->it_value); + if (flags & TIMER_ABSTIME) + expires = timens_ktime_to_host(timr->it_clock, expires); sigev_none = timr->it_sigev_notify == SIGEV_NONE; kc->timer_arm(timr, expires, flags & TIMER_ABSTIME, sigev_none);