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

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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>
This commit is contained in:
Andrew Lunn 2016-07-03 13:31:43 +02:00 committed by Simon Wunderlich
parent d7129dafcb
commit efb766af06
1 changed files with 105 additions and 0 deletions
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105
net/batman-adv/bat_iv_ogm.c
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@ -2681,6 +2681,110 @@ static void batadv_iv_gw_print(struct batadv_priv *bat_priv,
seq_puts(seq, "No gateways in range ...\n");
}
/**
* batadv_iv_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_iv_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) ||
nla_put_u8(msg, BATADV_ATTR_TQ, router_ifinfo->bat_iv.tq_avg) ||
nla_put(msg, BATADV_ATTR_ROUTER, ETH_ALEN,
router->addr) ||
nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
router->if_incoming->net_dev->name) ||
nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN,
gw_node->bandwidth_down) ||
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_iv_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_iv_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_iv_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_iv __read_mostly = {
.name = "BATMAN_IV",
.iface = {
@ -2707,6 +2811,7 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
.get_best_gw_node = batadv_iv_gw_get_best_gw_node,
.is_eligible = batadv_iv_gw_is_eligible,
.print = batadv_iv_gw_print,
.dump = batadv_iv_gw_dump,
},
};