get_net_ns_by_id
struct net *get_net_ns_by_id(const struct net *net, int id);
net = get_net_ns_by_id(caller_net, netns_id);
peer = get_net_ns_by_id(net, nla_get_s32(tb[NETNSA_NSID]));
EXPORT_SYMBOL_GPL(get_net_ns_by_id);
net = get_net_ns_by_id(sock_net(sk), netnsid);
net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
link_net = get_net_ns_by_id(tgt_net, id);
net = get_net_ns_by_id(sock_net(skb->sk),
net = get_net_ns_by_id(net, opts->netns_id);
net = get_net_ns_by_id(net, opts->netns_id);
net = get_net_ns_by_id(net, opts->netns_id);