userns,pidns: Verify the userns for new pid namespaces

[linux.git] / include / linux / user_namespace.h

diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index 32354b4b4b2ba5ae72034d00c3b1d43fa8c2a15c..4005877bb8b6d5ed633eae03abd60090e5a11d96 100644 (file)
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -112,8 +112,9 @@ extern ssize_t proc_projid_map_write(struct file *, const char __user *, size_t,
 extern ssize_t proc_setgroups_write(struct file *, const char __user *, size_t, loff_t *);
 extern int proc_setgroups_show(struct seq_file *m, void *v);
 extern bool userns_may_setgroups(const struct user_namespace *ns);
+extern bool in_userns(const struct user_namespace *ancestor,
+                      const struct user_namespace *child);
 extern bool current_in_userns(const struct user_namespace *target_ns);
-
 struct ns_common *ns_get_owner(struct ns_common *ns);
 #else
 
@@ -144,6 +145,12 @@ static inline bool userns_may_setgroups(const struct user_namespace *ns)
        return true;
 }
 
+static inline bool in_userns(const struct user_namespace *ancestor,
+                            const struct user_namespace *child)
+{
+       return true;
+}
+
 static inline bool current_in_userns(const struct user_namespace *target_ns)
 {
        return true;