From: Andrei Vagin <avagin@xxxxxxxxxx>
Adds boottime virtualisation for time namespace.
Introduce timespec for boottime clock into timens offsets and wire
clock_gettime() syscall.
Signed-off-by: Andrei Vagin <avagin@xxxxxxxxx>
Co-developed-by: Dmitry Safonov <dima@xxxxxxxxxx>
Signed-off-by: Dmitry Safonov <dima@xxxxxxxxxx>
---
include/linux/timens_offsets.h | 1 +
kernel/time/posix-timers.c | 1 +
kernel/time_namespace.c | 3 +++
3 files changed, 5 insertions(+)
diff --git a/include/linux/timens_offsets.h b/include/linux/timens_offsets.h
index 248b0c0bb92a..777530c46852 100644
--- a/include/linux/timens_offsets.h
+++ b/include/linux/timens_offsets.h
@@ -4,6 +4,7 @@
struct timens_offsets {
struct timespec64 monotonic_time_offset;
+ struct timespec64 monotonic_boottime_offset;
};
#endif
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index b6d5145858a3..782708054df2 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -1314,6 +1314,7 @@ static const struct k_clock clock_tai = {
static const struct k_clock clock_boottime = {
.clock_getres = posix_get_hrtimer_res,
.clock_get = posix_get_boottime,
+ .clock_timens_adjust = true,
.nsleep = common_nsleep,
.timer_create = common_timer_create,
.timer_set = common_timer_set,
diff --git a/kernel/time_namespace.c b/kernel/time_namespace.c
index 57694be9e9db..36b31f234472 100644
--- a/kernel/time_namespace.c
+++ b/kernel/time_namespace.c
@@ -208,6 +208,9 @@ static void clock_timens_fixup(int clockid, struct timespec64 *val, bool to_ns)
case CLOCK_MONOTONIC_COARSE:
offsets = &ns_offsets->monotonic_time_offset;
break;
+ case CLOCK_BOOTTIME:
+ offsets = &ns_offsets->monotonic_boottime_offset;
+ break;
}
if (!offsets)
--
2.20.1
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