The mesh interface can optimize the flooding of multicast packets based on the content of the global translation tables.
The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the configuration of this feature using the BATADV_ATTR_MULTICAST_MODE attribute. Setting the u8 to zero will disable this feature and setting it to something else is enabling this feature.
Signed-off-by: Sven Eckelmann sven@narfation.org --- Cc: Linus Lüssing linus.luessing@c0d3.blue --- include/uapi/linux/batman_adv.h | 8 ++++++++ net/batman-adv/netlink.c | 15 +++++++++++++++ 2 files changed, 23 insertions(+)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index efc06449..514acc06 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -454,6 +454,14 @@ enum batadv_nl_attrs { */ BATADV_ATTR_LOG_LEVEL,
+ /** + * @BATADV_ATTR_MULTICAST_MODE: whether multicast optimizations are + * enabled or disabled. If set to zero then all nodes in the mesh are + * going to use classic flooding for any multicast packet with no + * optimizations. + */ + BATADV_ATTR_MULTICAST_MODE, + /* 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 8e3a1b6e..32762003 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -155,6 +155,7 @@ static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { [BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 }, [BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 }, [BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 }, + [BATADV_ATTR_MULTICAST_MODE] = { .type = NLA_U8 }, };
/** @@ -342,6 +343,12 @@ static int batadv_netlink_mesh_put(struct sk_buff *msg, goto nla_put_failure; #endif /* CONFIG_BATMAN_ADV_DEBUG */
+#ifdef CONFIG_BATMAN_ADV_MCAST + if (nla_put_u8(msg, BATADV_ATTR_MULTICAST_MODE, + !!atomic_read(&bat_priv->multicast_mode))) + goto nla_put_failure; +#endif /* CONFIG_BATMAN_ADV_MCAST */ + batadv_hardif_put(primary_if);
genlmsg_end(msg, hdr); @@ -562,6 +569,14 @@ static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info) } #endif /* CONFIG_BATMAN_ADV_DEBUG */
+#ifdef CONFIG_BATMAN_ADV_MCAST + if (info->attrs[BATADV_ATTR_MULTICAST_MODE]) { + attr = info->attrs[BATADV_ATTR_MULTICAST_MODE]; + + atomic_set(&bat_priv->multicast_mode, !!nla_get_u8(attr)); + } +#endif /* CONFIG_BATMAN_ADV_MCAST */ + batadv_netlink_notify_mesh(bat_priv);
return 0;