kernel: add a helper to get an owning user namespace for a namespace

[cascardo/linux.git] / kernel / pid_namespace.c

diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index a65ba13..c02d744 100644 (file)
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -388,12 +388,18 @@ static int pidns_install(struct nsproxy *nsproxy, struct ns_common *ns)
        return 0;
 }
 
+static struct user_namespace *pidns_owner(struct ns_common *ns)
+{
+       return to_pid_ns(ns)->user_ns;
+}
+
 const struct proc_ns_operations pidns_operations = {
        .name           = "pid",
        .type           = CLONE_NEWPID,
        .get            = pidns_get,
        .put            = pidns_put,
        .install        = pidns_install,
+       .owner          = pidns_owner,
 };
 
 static __init int pid_namespaces_init(void)