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-rw-r--r--include/uapi/linux/batman_adv.h8
-rw-r--r--net/batman-adv/netlink.c17
2 files changed, 25 insertions, 0 deletions
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h
index 3cb35c661056..f303a1496476 100644
--- a/include/uapi/linux/batman_adv.h
+++ b/include/uapi/linux/batman_adv.h
@@ -388,6 +388,14 @@ enum batadv_nl_attrs {
*/
BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED,
+ /**
+ * @BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED: whether the distributed
+ * arp table feature is enabled. This feature uses a distributed hash
+ * table to answer ARP requests without flooding the request through
+ * the whole mesh.
+ */
+ BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
+
/* add attributes above here, update the policy in netlink.c */
/**
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index 40c940da9498..3028c2a5c782 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -145,6 +145,7 @@ static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
[BATADV_ATTR_ISOLATION_MASK] = { .type = NLA_U32 },
[BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 },
+ [BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 },
};
/**
@@ -291,6 +292,12 @@ static int batadv_netlink_mesh_fill(struct sk_buff *msg,
goto nla_put_failure;
#endif /* CONFIG_BATMAN_ADV_BLA */
+#ifdef CONFIG_BATMAN_ADV_DAT
+ if (nla_put_u8(msg, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
+ !!atomic_read(&bat_priv->distributed_arp_table)))
+ goto nla_put_failure;
+#endif /* CONFIG_BATMAN_ADV_DAT */
+
if (primary_if)
batadv_hardif_put(primary_if);
@@ -415,6 +422,16 @@ static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
}
#endif /* CONFIG_BATMAN_ADV_BLA */
+#ifdef CONFIG_BATMAN_ADV_DAT
+ if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) {
+ attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED];
+
+ atomic_set(&bat_priv->distributed_arp_table,
+ !!nla_get_u8(attr));
+ batadv_dat_status_update(bat_priv->soft_iface);
+ }
+#endif /* CONFIG_BATMAN_ADV_DAT */
+
batadv_netlink_notify_mesh(bat_priv);
return 0;