From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sven Eckelmann Subject: [RFC v2 14/19] batman-adv: Add multicast_mode mesh genl configuration Date: Fri, 23 Nov 2018 17:13:54 +0100 Message-ID: <20181123161359.13342-15-sven@narfation.org> References: <20181123161359.13342-1-sven@narfation.org> Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Jiri Pirko To: b.a.t.m.a.n-ZwoEplunGu2X36UT3dwllkB+6BGkLq7r@public.gmane.org Return-path: In-Reply-To: <20181123161359.13342-1-sven-KaDOiPu9UxWEi8DpZVb4nw@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: b.a.t.m.a.n-bounces-ZwoEplunGu2X36UT3dwllkB+6BGkLq7r@public.gmane.org Sender: "B.A.T.M.A.N" List-Id: netdev.vger.kernel.org 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. Cc: Jiri Pirko Signed-off-by: Sven Eckelmann --- 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 1c7d325f..c2ee1818 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 a38e28e3..1b2ea342 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; -- 2.19.1