diff options
| author | Andrei Vagin <avagin@gmail.com> | 2019-11-12 01:27:01 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-01-14 12:20:53 +0100 |
| commit | 89dd8eecfe961fab4924dcd14f80cf2ab2820044 (patch) | |
| tree | fcc408a7d8f1bc04818a7ef436791e14d8a38092 /include/linux/time_namespace.h | |
| parent | 5a590f35add93c2bdf3ed83eee73111021679562 (diff) | |
time: Add do_timens_ktime_to_host() helper
The helper subtracts namespace's clock offset from the given time
and ensures that the result is within [0, KTIME_MAX].
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/20191112012724.250792-13-dima@arista.com
Diffstat (limited to 'include/linux/time_namespace.h')
| -rw-r--r-- | include/linux/time_namespace.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/time_namespace.h b/include/linux/time_namespace.h index d7e3b4994e31..34ee110b5c35 100644 --- a/include/linux/time_namespace.h +++ b/include/linux/time_namespace.h @@ -59,6 +59,19 @@ static inline void timens_add_boottime(struct timespec64 *ts) *ts = timespec64_add(*ts, ns_offsets->boottime); } +ktime_t do_timens_ktime_to_host(clockid_t clockid, ktime_t tim, + struct timens_offsets *offsets); + +static inline ktime_t timens_ktime_to_host(clockid_t clockid, ktime_t tim) +{ + struct time_namespace *ns = current->nsproxy->time_ns; + + if (likely(ns == &init_time_ns)) + return tim; + + return do_timens_ktime_to_host(clockid, tim, &ns->offsets); +} + #else static inline struct time_namespace *get_time_ns(struct time_namespace *ns) { @@ -88,6 +101,10 @@ 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 ktime_t timens_ktime_to_host(clockid_t clockid, ktime_t tim) +{ + return tim; +} #endif #endif /* _LINUX_TIMENS_H */ |