mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-29 22:02:02 +00:00
Code Issues Releases Wiki Activity

timens: additional helper functions for boottime offset handling

Browse source 
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
This commit is contained in:
Michael Weiß 2020-10-27 21:42:56 +01:00 committed by Christian Brauner
parent 3cea11cd5e
commit 31909e3330
No known key found for this signature in database
GPG key ID: 91C61BC06578DCA2
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;