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| author | Sven Eckelmann <sven@narfation.org> | 2018-11-23 13:09:49 +0100 |
|---|---|---|
| committer | Simon Wunderlich <sw@simonwunderlich.de> | 2019-02-09 14:28:14 +0100 |
| commit | 3e15b06eb7e410ef9f1b9673be094b3e10eacf93 (patch) | |
| tree | edc2a261dcdc437418c1f9c3ea1c2d3aa033df54 | |
| parent | a1c8de80329609ba68ff860074070efb1e14ade4 (diff) | |
| download | linux-3e15b06eb7e410ef9f1b9673be094b3e10eacf93.tar.gz linux-3e15b06eb7e410ef9f1b9673be094b3e10eacf93.tar.bz2 linux-3e15b06eb7e410ef9f1b9673be094b3e10eacf93.zip | |
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>
| -rw-r--r-- | include/uapi/linux/batman_adv.h | 7 | ||||
| -rw-r--r-- | net/batman-adv/netlink.c | 12 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index f303a1496476..847841b8de5d 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -396,6 +396,13 @@ enum batadv_nl_attrs { */ BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED, + /** + * @BATADV_ATTR_FRAGMENTATION_ENABLED: whether the data traffic going + * through the mesh will be fragmented or silently discarded if the + * packet size exceeds the outgoing interface MTU. + */ + BATADV_ATTR_FRAGMENTATION_ENABLED, + /* 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 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; |