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batman-adv: Add network_coding mesh genl configuration

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The mesh interface can use (in an homogeneous mesh) network coding, a
mechanism that aims to increase the overall network throughput by fusing
multiple packets in one transmission.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the BATADV_ATTR_NETWORK_CODING_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>
This commit is contained in:
Sven Eckelmann 2018-11-23 13:26:14 +01:00 committed by Simon Wunderlich
parent f75b56bc91
commit 6c57cde680
2 changed files with 24 additions and 0 deletions
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7
include/uapi/linux/batman_adv.h
View File

@ -464,6 +464,13 @@ enum batadv_nl_attrs {
*/
BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED,
/**
* @BATADV_ATTR_NETWORK_CODING_ENABLED: whether Network Coding (using
* some magic to send fewer wifi packets but still the same content) is
* enabled or not.
*/
BATADV_ATTR_NETWORK_CODING_ENABLED,
/* add attributes above here, update the policy in netlink.c */
/**

17
net/batman-adv/netlink.c
View File

@ -55,6 +55,7 @@
#include "hard-interface.h"
#include "log.h"
#include "multicast.h"
#include "network-coding.h"
#include "originator.h"
#include "soft-interface.h"
#include "tp_meter.h"
@ -156,6 +157,7 @@ static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
[BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 },
[BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 },
[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED] = { .type = NLA_U8 },
[BATADV_ATTR_NETWORK_CODING_ENABLED] = { .type = NLA_U8 },
};
/**
@ -350,6 +352,12 @@ static int batadv_netlink_mesh_fill(struct sk_buff *msg,
goto nla_put_failure;
#endif /* CONFIG_BATMAN_ADV_MCAST */
#ifdef CONFIG_BATMAN_ADV_NC
if (nla_put_u8(msg, BATADV_ATTR_NETWORK_CODING_ENABLED,
!!atomic_read(&bat_priv->network_coding)))
goto nla_put_failure;
#endif /* CONFIG_BATMAN_ADV_NC */
if (primary_if)
batadv_hardif_put(primary_if);
@ -579,6 +587,15 @@ static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
}
#endif /* CONFIG_BATMAN_ADV_MCAST */
#ifdef CONFIG_BATMAN_ADV_NC
if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) {
attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED];
atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr));
batadv_nc_status_update(bat_priv->soft_iface);
}
#endif /* CONFIG_BATMAN_ADV_NC */
batadv_netlink_notify_mesh(bat_priv);
return 0;