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batman-adv: Add multicast forceflood mesh genl configuration

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The mesh interface can optimize the flooding of multicast packets based on
the content of the global translation tables. To disable this behavior and
use the broadcast-like flooding of the packets, forceflood has to be
enabled.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the
BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED attribute. Setting the u8 to zero
will disable this feature (allowing multicast optimizations) and setting it
to something else is enabling this feature (forcing simple flooding).

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
This commit is contained in:
Sven Eckelmann
2018-11-23 13:25:05 +01:00
committed by Simon Wunderlich
parent b85bd09109
commit f75b56bc91
2 changed files with 24 additions and 0 deletions
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15
net/batman-adv/netlink.c
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@@ -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_FORCEFLOOD_ENABLED] = { .type = NLA_U8 },
};
/**
@@ -343,6 +344,12 @@ static int batadv_netlink_mesh_fill(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_FORCEFLOOD_ENABLED,
!atomic_read(&bat_priv->multicast_mode)))
goto nla_put_failure;
#endif /* CONFIG_BATMAN_ADV_MCAST */
if (primary_if)
batadv_hardif_put(primary_if);
@@ -564,6 +571,14 @@ 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_FORCEFLOOD_ENABLED]) {
attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED];
atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr));
}
#endif /* CONFIG_BATMAN_ADV_MCAST */
batadv_netlink_notify_mesh(bat_priv);
return 0;