[PATCHv8 04/34] time: Add timens_offsets to be used for tasks in timens
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STALE2439d
LANDED
From: Dmitry Safonov <hidden>
Date: 2019-11-12 01:27:44
Also in:
lkml
Subsystem:
posix clocks and timers, the rest · Maintainers:
Anna-Maria Behnsen, Frederic Weisbecker, Thomas Gleixner, Linus Torvalds
Revision v8 of 8 in this series; landed in mainline as af993f58d69e on 2020-01-14.
Revisions (8)
From: Andrei Vagin <redacted> Introduce offsets for time namespace. They will contain an adjustment needed to convert clocks to/from host's. A new namespace is created with the same offsets as the time namespace of the current process. Signed-off-by: Andrei Vagin <redacted> Co-developed-by: Dmitry Safonov <redacted> Signed-off-by: Dmitry Safonov <redacted> --- include/linux/time_namespace.h | 22 ++++++++++++++++++++++ kernel/time/namespace.c | 2 ++ 2 files changed, 24 insertions(+)
diff --git a/include/linux/time_namespace.h b/include/linux/time_namespace.h
index 873b908c9ba8..3d429c7ecca5 100644
--- a/include/linux/time_namespace.h
+++ b/include/linux/time_namespace.h@@ -12,11 +12,17 @@ struct user_namespace; extern struct user_namespace init_user_ns; +struct timens_offsets { + struct timespec64 monotonic; + struct timespec64 boottime; +}; + struct time_namespace { struct kref kref; struct user_namespace *user_ns; struct ucounts *ucounts; struct ns_common ns; + struct timens_offsets offsets; } __randomize_layout; extern struct time_namespace init_time_ns;
@@ -37,6 +43,20 @@ static inline void put_time_ns(struct time_namespace *ns) kref_put(&ns->kref, free_time_ns); } +static inline void timens_add_monotonic(struct timespec64 *ts) +{ + struct timens_offsets *ns_offsets = ¤t->nsproxy->time_ns->offsets; + + *ts = timespec64_add(*ts, ns_offsets->monotonic); +} + +static inline void timens_add_boottime(struct timespec64 *ts) +{ + struct timens_offsets *ns_offsets = ¤t->nsproxy->time_ns->offsets; + + *ts = timespec64_add(*ts, ns_offsets->boottime); +} + #else static inline struct time_namespace *get_time_ns(struct time_namespace *ns) {
@@ -61,6 +81,8 @@ static inline int timens_on_fork(struct nsproxy *nsproxy, struct task_struct *ts return 0; } +static inline void timens_add_monotonic(struct timespec64 *ts) {} +static inline void timens_add_boottime(struct timespec64 *ts) {} #endif #endif /* _LINUX_TIMENS_H */
diff --git a/kernel/time/namespace.c b/kernel/time/namespace.c
index 2662a69e0382..c2a58e45fc4b 100644
--- a/kernel/time/namespace.c
+++ b/kernel/time/namespace.c@@ -14,6 +14,7 @@ #include <linux/slab.h> #include <linux/cred.h> #include <linux/err.h> +#include <linux/mm.h> static struct ucounts *inc_time_namespaces(struct user_namespace *ns) {
@@ -60,6 +61,7 @@ static struct time_namespace *clone_time_ns(struct user_namespace *user_ns, ns->ucounts = ucounts; ns->ns.ops = &timens_operations; ns->user_ns = get_user_ns(user_ns); + ns->offsets = old_ns->offsets; return ns; fail_free:
--
2.24.0