[RFC v2 05/19] batman-adv: Add aggregated_ogms mesh genl configuration

[Sven Eckelmann]

The mesh interface can delay OGM messages to aggregate different ogms
together in a single OGM packet.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the BATADV_ATTR_AGGREGATED_OGMS
attribute. Setting the u8 to zero will disable this feature and setting it
to something else is enabling this feature.

Cc: Jiri Pirko <j...@mellanox.com>
Signed-off-by: Sven Eckelmann <s...@narfation.org>
---
 include/uapi/linux/batman_adv.h |  6 ++++++
 net/batman-adv/netlink.c        | 12 ++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h
index 865cdf90..a01d90ed 100644
--- a/include/uapi/linux/batman_adv.h
+++ b/include/uapi/linux/batman_adv.h
@@ -350,6 +350,12 @@ enum batadv_nl_attrs {
         */
        BATADV_ATTR_VLANID,
 
+       /**
+        * @BATADV_ATTR_AGGREGATED_OGMS: whether the batman protocol messages
+        *  of the mesh mesh interface shall be aggregated or not.
+        */
+       BATADV_ATTR_AGGREGATED_OGMS,
+
        /* 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 30ed0672..862d47c4 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -139,6 +139,7 @@ static const struct nla_policy 
batadv_netlink_policy[NUM_BATADV_ATTR] = {
        [BATADV_ATTR_MCAST_FLAGS]               = { .type = NLA_U32 },
        [BATADV_ATTR_MCAST_FLAGS_PRIV]          = { .type = NLA_U32 },
        [BATADV_ATTR_VLANID]                    = { .type = NLA_U16 },
+       [BATADV_ATTR_AGGREGATED_OGMS]           = { .type = NLA_U8 },
 };
 
 /**
@@ -214,6 +215,10 @@ static int batadv_netlink_mesh_put(struct sk_buff *msg,
                        goto nla_put_failure;
        }
 
+       if (nla_put_u8(msg, BATADV_ATTR_AGGREGATED_OGMS,
+                      !!atomic_read(&bat_priv->aggregated_ogms)))
+               goto nla_put_failure;
+
        batadv_hardif_put(primary_if);
 
        genlmsg_end(msg, hdr);
@@ -295,6 +300,13 @@ static int batadv_netlink_get_mesh(struct sk_buff *skb, 
struct genl_info *info)
 static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
 {
        struct batadv_priv *bat_priv = info->user_ptr[0];
+       struct nlattr *attr;
+
+       if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS]) {
+               attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS];
+
+               atomic_set(&bat_priv->aggregated_ogms, !!nla_get_u8(attr));
+       }
 
        batadv_netlink_notify_mesh(bat_priv);
 
-- 
2.19.1