Add support to get namespace from a given lunatik state

Author: MatheusNtg

lunatik.h

@@ -28,6 +28,7 @@
 struct lunatik_instance {
 	struct hlist_head states_table[LUNATIK_HASH_BUCKETS];
 	struct reply_buffer reply_buffer;
+	struct net namespace;
 	spinlock_t statestable_lock;
 	spinlock_t rfcnt_lock;
 	spinlock_t sendmessage_lock;

lunatik_core.c

@@ -205,6 +205,7 @@ static int __net_init lunatik_instancenew(struct net *net)
 	spin_lock_init(&(instance->rfcnt_lock));
 	hash_init(instance->states_table);
 	(instance->reply_buffer).status = RB_INIT;
+	instance->namespace = *net;
 	return 0;
 }