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authorSven Eckelmann <sven@narfation.org>2018-11-23 13:09:49 +0100
committerSimon Wunderlich <sw@simonwunderlich.de>2019-02-09 14:28:14 +0100
commit3e15b06eb7e410ef9f1b9673be094b3e10eacf93 (patch)
treeedc2a261dcdc437418c1f9c3ea1c2d3aa033df54 /net/batman-adv
parenta1c8de80329609ba68ff860074070efb1e14ade4 (diff)
downloadlinux-3e15b06eb7e410ef9f1b9673be094b3e10eacf93.tar.bz2
batman-adv: Add fragmentation mesh genl configuration
The mesh interface can fragment unicast packets when the packet size exceeds the outgoing slave/hard-interface MTU. The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the configuration of this feature using the BATADV_ATTR_FRAGMENTATION_ENABLED 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> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/netlink.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index 3028c2a5c782..5b2160d2f482 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -146,6 +146,7 @@ static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
[BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 },
+ [BATADV_ATTR_FRAGMENTATION_ENABLED] = { .type = NLA_U8 },
};
/**
@@ -298,6 +299,10 @@ static int batadv_netlink_mesh_fill(struct sk_buff *msg,
goto nla_put_failure;
#endif /* CONFIG_BATMAN_ADV_DAT */
+ if (nla_put_u8(msg, BATADV_ATTR_FRAGMENTATION_ENABLED,
+ !!atomic_read(&bat_priv->fragmentation)))
+ goto nla_put_failure;
+
if (primary_if)
batadv_hardif_put(primary_if);
@@ -432,6 +437,13 @@ static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
}
#endif /* CONFIG_BATMAN_ADV_DAT */
+ if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) {
+ attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
+
+ atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr));
+ batadv_update_min_mtu(bat_priv->soft_iface);
+ }
+
batadv_netlink_notify_mesh(bat_priv);
return 0;