diff options
| author | Andrei Vagin <avagin@openvz.org> | 2019-11-12 04:27:00 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-01-14 14:20:52 +0300 |
| commit | 5a590f35add93c2bdf3ed83eee73111021679562 (patch) | |
| tree | 259e9f5d400065e26a4a3b6f0a2ac98b39c9e096 /kernel/time/alarmtimer.c | |
| parent | 198fa445d5c4c1a1c6c1d39f962559f8d008e79d (diff) | |
| download | linux-5a590f35add93c2bdf3ed83eee73111021679562.tar.xz | |
posix-clocks: Wire up clock_gettime() with timens offsets
Adjust monotonic and boottime clocks with per-timens offsets. As the
result a process inside time namespace will see timers and clocks corrected
to offsets that were set when the namespace was created
Note that applications usually go through vDSO to get time, which is not
yet adjusted. Further changes will complete time namespace virtualisation
with vDSO support.
Co-developed-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20191112012724.250792-12-dima@arista.com
Diffstat (limited to 'kernel/time/alarmtimer.c')
| -rw-r--r-- | kernel/time/alarmtimer.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 4d8c90546635..9a8e81bc4ec2 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -26,6 +26,7 @@ #include <linux/freezer.h> #include <linux/compat.h> #include <linux/module.h> +#include <linux/time_namespace.h> #include "posix-timers.h" @@ -886,6 +887,12 @@ static struct platform_driver alarmtimer_driver = { } }; +static void get_boottime_timespec(struct timespec64 *tp) +{ + ktime_get_boottime_ts64(tp); + timens_add_boottime(tp); +} + /** * alarmtimer_init - Initialize alarm timer code * @@ -906,7 +913,7 @@ static int __init alarmtimer_init(void) alarm_bases[ALARM_REALTIME].get_timespec = ktime_get_real_ts64, alarm_bases[ALARM_BOOTTIME].base_clockid = CLOCK_BOOTTIME; alarm_bases[ALARM_BOOTTIME].get_ktime = &ktime_get_boottime; - alarm_bases[ALARM_BOOTTIME].get_timespec = ktime_get_boottime_ts64; + alarm_bases[ALARM_BOOTTIME].get_timespec = get_boottime_timespec; for (i = 0; i < ALARM_NUMTYPE; i++) { timerqueue_init_head(&alarm_bases[i].timerqueue); spin_lock_init(&alarm_bases[i].lock); |