mirrors
/
anolis-cloud-kernel
mirror of https://gitee.com/anolis/cloud-kernel.git
8
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

timens: additional helper functions for boottime offset handling 

ANBZ: #12420

commit 31909e3330 upstream.

Provide functions for time_namespace to subtract the boottime offset
from a timespec64 as well as to apply the boottime offset to u64 types in
nanoseconds.

Signed-off-by: Michael Weiß <michael.weiss@aisec.fraunhofer.de>
Reviewed-by: Andrei Vagin <avagin@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20201027204258.7869-2-michael.weiss@aisec.fraunhofer.de
Signed-off-by: Qiao Ma <mqaio@linux.alibaba.com>
Reviewed-by: Liu Song <liusong@linux.alibaba.com>
Reviewed-by: Yi Tao <escape@linux.alibaba.com>
Link: https://gitee.com/anolis/cloud-kernel/pulls/4484
This commit is contained in:
Michael Weiß 2020-10-27 21:42:56 +01:00 committed by 小龙
parent 0ad6911d62
commit a868415511
1 changed files with 22 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
include/linux/time_namespace.h
View File

@ -77,6 +77,20 @@ static inline void timens_add_boottime(struct timespec64 *ts)
*ts = timespec64_add(*ts, ns_offsets->boottime);
}
static inline u64 timens_add_boottime_ns(u64 nsec)
{
struct timens_offsets *ns_offsets = &current->nsproxy->time_ns->offsets;
return nsec + timespec64_to_ns(&ns_offsets->boottime);
}
static inline void timens_sub_boottime(struct timespec64 *ts)
{
struct timens_offsets *ns_offsets = &current->nsproxy->time_ns->offsets;
*ts = timespec64_sub(*ts, ns_offsets->boottime);
}
ktime_t do_timens_ktime_to_host(clockid_t clockid, ktime_t tim,
struct timens_offsets *offsets);
@ -130,6 +144,14 @@ static inline int timens_on_fork(struct nsproxy *nsproxy,
static inline void timens_add_monotonic(struct timespec64 *ts) { }
static inline void timens_add_boottime(struct timespec64 *ts) { }
static inline u64 timens_add_boottime_ns(u64 nsec)
{
return nsec;
}
static inline void timens_sub_boottime(struct timespec64 *ts) { }
static inline ktime_t timens_ktime_to_host(clockid_t clockid, ktime_t tim)
{
return tim;