batman-adv: Add orig_interval mesh genl configuration

The OGM packets are transmitted every orig_interval milliseconds. This
value can be changed using the configuration interface.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the u32 BATADV_ATTR_ORIG_INTERVAL
attribute.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

1 files changed, 17 insertions, 0 deletions

diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index 6f01f92e6ab3..e25c139ba0e1 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -158,6 +158,7 @@ static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
         [BATADV_ATTR_LOG_LEVEL]                 = { .type = NLA_U32 },
         [BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]      = { .type = NLA_U8 },
         [BATADV_ATTR_NETWORK_CODING_ENABLED]    = { .type = NLA_U8 },
+        [BATADV_ATTR_ORIG_INTERVAL]             = { .type = NLA_U32 },
 };
 
 /**
@@ -358,6 +359,10 @@ static int batadv_netlink_mesh_fill(struct sk_buff *msg,
                 goto nla_put_failure;
 #endif /* CONFIG_BATMAN_ADV_NC */
 
+        if (nla_put_u32(msg, BATADV_ATTR_ORIG_INTERVAL,
+                        atomic_read(&bat_priv->orig_interval)))
+                goto nla_put_failure;
+
         if (primary_if)
                 batadv_hardif_put(primary_if);
 
@@ -596,6 +601,18 @@ static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
         }
 #endif /* CONFIG_BATMAN_ADV_NC */
 
+        if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) {
+                u32 orig_interval;
+
+                attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL];
+                orig_interval = nla_get_u32(attr);
+
+                orig_interval = min_t(u32, orig_interval, INT_MAX);
+                orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER);
+
+                atomic_set(&bat_priv->orig_interval, orig_interval);
+        }
+
         batadv_netlink_notify_mesh(bat_priv);
 
         return 0;