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| author | Christian Brauner <christian.brauner@ubuntu.com> | 2020-07-06 17:49:10 +0200 |
|---|---|---|
| committer | Christian Brauner <christian.brauner@ubuntu.com> | 2020-07-08 11:14:21 +0200 |
| commit | 5cfea9a106bbb1af919ab94456fdd02209984070 (patch) | |
| tree | 0c49d9fc997cb49b98dd11bab65fea6d7ff948e2 /kernel/time/namespace.c | |
| parent | timens: make vdso_join_timens() always succeed (diff) | |
| download | linux-5cfea9a106bbb1af919ab94456fdd02209984070.tar.xz linux-5cfea9a106bbb1af919ab94456fdd02209984070.zip | |
timens: add timens_commit() helper
Wrap the calls to timens_set_vvar_page() and vdso_join_timens() in
timens_on_fork() and timens_install() in a new timens_commit() helper.
We'll use this helper in a follow-up patch in nsproxy too.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: Andrei Vagin <avagin@gmail.com>
Cc: Will Deacon <will@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Dmitry Safonov <dima@arista.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20200706154912.3248030-3-christian.brauner@ubuntu.com
Diffstat (limited to 'kernel/time/namespace.c')
| -rw-r--r-- | kernel/time/namespace.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/kernel/time/namespace.c b/kernel/time/namespace.c index e5af6fe87af8..aa7b90aac2a7 100644 --- a/kernel/time/namespace.c +++ b/kernel/time/namespace.c @@ -280,6 +280,12 @@ static void timens_put(struct ns_common *ns) put_time_ns(to_time_ns(ns)); } +static void timens_commit(struct task_struct *tsk, struct time_namespace *ns) +{ + timens_set_vvar_page(tsk, ns); + vdso_join_timens(tsk, ns); +} + static int timens_install(struct nsset *nsset, struct ns_common *new) { struct nsproxy *nsproxy = nsset->nsproxy; @@ -292,9 +298,8 @@ static int timens_install(struct nsset *nsset, struct ns_common *new) !ns_capable(nsset->cred->user_ns, CAP_SYS_ADMIN)) return -EPERM; - timens_set_vvar_page(current, ns); - vdso_join_timens(current, ns); + timens_commit(current, ns); get_time_ns(ns); put_time_ns(nsproxy->time_ns); @@ -315,14 +320,12 @@ int timens_on_fork(struct nsproxy *nsproxy, struct task_struct *tsk) if (nsproxy->time_ns == nsproxy->time_ns_for_children) return 0; - timens_set_vvar_page(tsk, ns); - - vdso_join_timens(tsk, ns); - get_time_ns(ns); put_time_ns(nsproxy->time_ns); nsproxy->time_ns = ns; + timens_commit(tsk, ns); + return 0; } |