peernet2id_alloc
id = peernet2id_alloc(genl_info_net(info),
int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp);
new_nsid = peernet2id_alloc(dev_net(dev), net, GFP_KERNEL);
EXPORT_SYMBOL_GPL(peernet2id_alloc);
int id = peernet2id_alloc(src_net, link_net, gfp);
int id = peernet2id_alloc(net, devl_net, GFP_ATOMIC);
int id = peernet2id_alloc(net, net_vport, GFP_ATOMIC);