Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b71bb6f9 authored by Sven Eckelmann's avatar Sven Eckelmann Committed by Simon Wunderlich
Browse files

batman-adv: add B.A.T.M.A.N. V bat_gw_dump implementations

parent efb766af
Loading
Loading
Loading
Loading
+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,
	},
};