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authorAndrey Vagin <avagin@openvz.org>2016-09-06 00:47:13 -0700
committerEric W. Biederman <ebiederm@xmission.com>2016-09-22 19:59:39 -0500
commitbcac25a58bfc6bd79191ac5d7afb49bea96da8c9 (patch)
tree28a8ae71b2939267deba0807bcbbed28e77470c0 /include/linux/proc_ns.h
parent29b4817d4018df78086157ea3a55c1d9424a7cfc (diff)
kernel: add a helper to get an owning user namespace for a namespace
Return -EPERM if an owning user namespace is outside of a process current user namespace. v2: In a first version ns_get_owner returned ENOENT for init_user_ns. This special cases was removed from this version. There is nothing outside of init_user_ns, so we can return EPERM. v3: rename ns->get_owner() to ns->owner(). get_* usually means that it grabs a reference. Acked-by: Serge Hallyn <serge@hallyn.com> Signed-off-by: Andrei Vagin <avagin@openvz.org> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'include/linux/proc_ns.h')
-rw-r--r--include/linux/proc_ns.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/proc_ns.h b/include/linux/proc_ns.h
index de0e7719d4c5..ca85a4348ffc 100644
--- a/include/linux/proc_ns.h
+++ b/include/linux/proc_ns.h
@@ -18,6 +18,7 @@ struct proc_ns_operations {
struct ns_common *(*get)(struct task_struct *task);
void (*put)(struct ns_common *ns);
int (*install)(struct nsproxy *nsproxy, struct ns_common *ns);
+ struct user_namespace *(*owner)(struct ns_common *ns);
};
extern const struct proc_ns_operations netns_operations;