batman-adv: add B.A.T.M.A.N. IV bat_gw_dump implementations
Dump the list of gateways via the netlink socket. Signed-off-by: Andrew Lunn <andrew@lunn.ch> [sven.eckelmann@open-mesh.com: integrate in batadv_algo_ops] Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
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@ -2681,6 +2681,110 @@ static void batadv_iv_gw_print(struct batadv_priv *bat_priv,
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seq_puts(seq, "No gateways in range ...\n");
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}
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/**
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* batadv_iv_gw_dump_entry - Dump a gateway into a message
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* @msg: Netlink message to dump into
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* @portid: Port making netlink request
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* @seq: Sequence number of netlink message
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* @bat_priv: The bat priv with all the soft interface information
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* @gw_node: Gateway to be dumped
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*
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* Return: Error code, or 0 on success
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*/
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static int batadv_iv_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
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struct batadv_priv *bat_priv,
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struct batadv_gw_node *gw_node)
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{
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struct batadv_neigh_ifinfo *router_ifinfo = NULL;
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struct batadv_neigh_node *router;
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struct batadv_gw_node *curr_gw;
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int ret = -EINVAL;
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void *hdr;
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router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT);
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if (!router)
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goto out;
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router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
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if (!router_ifinfo)
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goto out;
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curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
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hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
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NLM_F_MULTI, BATADV_CMD_GET_GATEWAYS);
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if (!hdr) {
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ret = -ENOBUFS;
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goto out;
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}
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ret = -EMSGSIZE;
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if (curr_gw == gw_node)
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if (nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) {
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genlmsg_cancel(msg, hdr);
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goto out;
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}
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if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
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gw_node->orig_node->orig) ||
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nla_put_u8(msg, BATADV_ATTR_TQ, router_ifinfo->bat_iv.tq_avg) ||
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nla_put(msg, BATADV_ATTR_ROUTER, ETH_ALEN,
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router->addr) ||
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nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
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router->if_incoming->net_dev->name) ||
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nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN,
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gw_node->bandwidth_down) ||
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nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_UP,
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gw_node->bandwidth_up)) {
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genlmsg_cancel(msg, hdr);
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goto out;
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}
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genlmsg_end(msg, hdr);
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ret = 0;
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out:
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if (router_ifinfo)
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batadv_neigh_ifinfo_put(router_ifinfo);
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if (router)
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batadv_neigh_node_put(router);
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return ret;
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}
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/**
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* batadv_iv_gw_dump - Dump gateways into a message
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* @msg: Netlink message to dump into
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* @cb: Control block containing additional options
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* @bat_priv: The bat priv with all the soft interface information
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*/
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static void batadv_iv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb,
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struct batadv_priv *bat_priv)
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{
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int portid = NETLINK_CB(cb->skb).portid;
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struct batadv_gw_node *gw_node;
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int idx_skip = cb->args[0];
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int idx = 0;
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rcu_read_lock();
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hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
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if (idx++ < idx_skip)
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continue;
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if (batadv_iv_gw_dump_entry(msg, portid, cb->nlh->nlmsg_seq,
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bat_priv, gw_node)) {
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idx_skip = idx - 1;
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goto unlock;
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}
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}
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idx_skip = idx;
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unlock:
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rcu_read_unlock();
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cb->args[0] = idx_skip;
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}
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static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
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.name = "BATMAN_IV",
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.iface = {
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@ -2707,6 +2811,7 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
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.get_best_gw_node = batadv_iv_gw_get_best_gw_node,
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.is_eligible = batadv_iv_gw_is_eligible,
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.print = batadv_iv_gw_print,
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.dump = batadv_iv_gw_dump,
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},
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};
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