int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg,
			struct tipc_link *bcl)
{
	int err;
	void *hdr;
	struct nlattr *attrs;
	struct nlattr *prop;
	u32 bc_mode = tipc_bcast_get_mode(net);
	u32 bc_ratio = tipc_bcast_get_broadcast_ratio(net);

	if (!bcl)
		return 0;

	tipc_bcast_lock(net);

	hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
			  NLM_F_MULTI, TIPC_NL_LINK_GET);
	if (!hdr) {
		tipc_bcast_unlock(net);
		return -EMSGSIZE;
	}

	attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_LINK);
	if (!attrs)
		goto msg_full;

	/* The broadcast link is always up */
	if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP))
		goto attr_msg_full;

	if (nla_put_flag(msg->skb, TIPC_NLA_LINK_BROADCAST))
		goto attr_msg_full;
	if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, bcl->name))
		goto attr_msg_full;
	if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, 0))
		goto attr_msg_full;
	if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, 0))
		goto attr_msg_full;

	prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_LINK_PROP);
	if (!prop)
		goto attr_msg_full;
	if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->max_win))
		goto prop_msg_full;
	if (nla_put_u32(msg->skb, TIPC_NLA_PROP_BROADCAST, bc_mode))
		goto prop_msg_full;
	if (bc_mode & BCLINK_MODE_SEL)
		if (nla_put_u32(msg->skb, TIPC_NLA_PROP_BROADCAST_RATIO,
				bc_ratio))
			goto prop_msg_full;
	nla_nest_end(msg->skb, prop);

	err = __tipc_nl_add_bc_link_stat(msg->skb, &bcl->stats);
	if (err)
		goto attr_msg_full;

	tipc_bcast_unlock(net);
	nla_nest_end(msg->skb, attrs);
	genlmsg_end(msg->skb, hdr);

	return 0;

prop_msg_full:
	nla_nest_cancel(msg->skb, prop);
attr_msg_full:
	nla_nest_cancel(msg->skb, attrs);
msg_full:
	tipc_bcast_unlock(net);
	genlmsg_cancel(msg->skb, hdr);

	return -EMSGSIZE;
}
int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg,
			struct tipc_link *bcl)
{
	int err;
	void *hdr;
	struct nlattr *attrs;
	struct nlattr *prop;
	u32 bc_mode = tipc_bcast_get_mode(net);
	u32 bc_ratio = tipc_bcast_get_broadcast_ratio(net);

	if (!bcl)
		return 0;

	tipc_bcast_lock(net);

	hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
			  NLM_F_MULTI, TIPC_NL_LINK_GET);
	if (!hdr) {
		tipc_bcast_unlock(net);
		return -EMSGSIZE;
	}

	attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_LINK);
	if (!attrs)
		goto msg_full;

	 
	if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP))
		goto attr_msg_full;

	if (nla_put_flag(msg->skb, TIPC_NLA_LINK_BROADCAST))
		goto attr_msg_full;
	if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, bcl->name))
		goto attr_msg_full;
	if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, 0))
		goto attr_msg_full;
	if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, 0))
		goto attr_msg_full;

	prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_LINK_PROP);
	if (!prop)
		goto attr_msg_full;
	if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->max_win))
		goto prop_msg_full;
	if (nla_put_u32(msg->skb, TIPC_NLA_PROP_BROADCAST, bc_mode))
		goto prop_msg_full;
	if (bc_mode & BCLINK_MODE_SEL)
		if (nla_put_u32(msg->skb, TIPC_NLA_PROP_BROADCAST_RATIO,
				bc_ratio))
			goto prop_msg_full;
	nla_nest_end(msg->skb, prop);

	err = __tipc_nl_add_bc_link_stat(msg->skb, &bcl->stats);
	if (err)
		goto attr_msg_full;

	tipc_bcast_unlock(net);
	nla_nest_end(msg->skb, attrs);
	genlmsg_end(msg->skb, hdr);

	return 0;

prop_msg_full:
	nla_nest_cancel(msg->skb, prop);
attr_msg_full:
	nla_nest_cancel(msg->skb, attrs);
msg_full:
	tipc_bcast_unlock(net);
	genlmsg_cancel(msg->skb, hdr);

	return -EMSGSIZE;
}