batman-adv: add B.A.T.M.A.N. V bat_gw_dump implementations (b71bb6f9) · Commits · EulixOS / Software / Kernel

net/batman-adv/bat_v.c

+125 −0

Original line number	Diff line number	Diff line
		@@ -897,6 +897,130 @@ static void batadv_v_gw_print(struct batadv_priv *bat_priv,
		seq_puts(seq, "No gateways in range ...\n");
		}

		/**
		* batadv_v_gw_dump_entry - Dump a gateway into a message
		* @msg: Netlink message to dump into
		* @portid: Port making netlink request
		* @seq: Sequence number of netlink message
		* @bat_priv: The bat priv with all the soft interface information
		* @gw_node: Gateway to be dumped
		*
		* Return: Error code, or 0 on success
		*/
		static int batadv_v_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
		struct batadv_priv *bat_priv,
		struct batadv_gw_node *gw_node)
		{
		struct batadv_neigh_ifinfo *router_ifinfo = NULL;
		struct batadv_neigh_node *router;
		struct batadv_gw_node *curr_gw;
		int ret = -EINVAL;
		void *hdr;

		router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT);
		if (!router)
		goto out;

		router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
		if (!router_ifinfo)
		goto out;

		curr_gw = batadv_gw_get_selected_gw_node(bat_priv);

		hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
		NLM_F_MULTI, BATADV_CMD_GET_GATEWAYS);
		if (!hdr) {
		ret = -ENOBUFS;
		goto out;
		}

		ret = -EMSGSIZE;

		if (curr_gw == gw_node) {
		if (nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) {
		genlmsg_cancel(msg, hdr);
		goto out;
		}
		}

		if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
		gw_node->orig_node->orig)) {
		genlmsg_cancel(msg, hdr);
		goto out;
		}

		if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT,
		router_ifinfo->bat_v.throughput)) {
		genlmsg_cancel(msg, hdr);
		goto out;
		}

		if (nla_put(msg, BATADV_ATTR_ROUTER, ETH_ALEN, router->addr)) {
		genlmsg_cancel(msg, hdr);
		goto out;
		}

		if (nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
		router->if_incoming->net_dev->name)) {
		genlmsg_cancel(msg, hdr);
		goto out;
		}

		if (nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN,
		gw_node->bandwidth_down)) {
		genlmsg_cancel(msg, hdr);
		goto out;
		}

		if (nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_UP, gw_node->bandwidth_up)) {
		genlmsg_cancel(msg, hdr);
		goto out;
		}

		genlmsg_end(msg, hdr);
		ret = 0;

		out:
		if (router_ifinfo)
		batadv_neigh_ifinfo_put(router_ifinfo);
		if (router)
		batadv_neigh_node_put(router);
		return ret;
		}

		/**
		* batadv_v_gw_dump - Dump gateways into a message
		* @msg: Netlink message to dump into
		* @cb: Control block containing additional options
		* @bat_priv: The bat priv with all the soft interface information
		*/
		static void batadv_v_gw_dump(struct sk_buff msg, struct netlink_callback cb,
		struct batadv_priv *bat_priv)
		{
		int portid = NETLINK_CB(cb->skb).portid;
		struct batadv_gw_node *gw_node;
		int idx_skip = cb->args[0];
		int idx = 0;

		rcu_read_lock();
		hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
		if (idx++ < idx_skip)
		continue;

		if (batadv_v_gw_dump_entry(msg, portid, cb->nlh->nlmsg_seq,
		bat_priv, gw_node)) {
		idx_skip = idx - 1;
		goto unlock;
		}
		}

		idx_skip = idx;
		unlock:
		rcu_read_unlock();

		cb->args[0] = idx_skip;
		}

		static struct batadv_algo_ops batadv_batman_v __read_mostly = {
		.name = "BATMAN_V",
		.iface = {
		@@ -923,6 +1047,7 @@ static struct batadv_algo_ops batadv_batman_v __read_mostly = {
		.get_best_gw_node = batadv_v_gw_get_best_gw_node,
		.is_eligible = batadv_v_gw_is_eligible,
		.print = batadv_v_gw_print,
		.dump = batadv_v_gw_dump,
		},
		};