Repository : ssh://git@open-mesh.org/batman-adv
On branch : master
commit bb219831921415a32b2fad132c163ef82fad1e33 Author: Sven Eckelmann sven@narfation.org Date: Sat Feb 9 14:41:02 2019 +0100
batman-adv: Add hop_penalty mesh genl configuration
The TQ (B.A.T.M.A.N. IV) and throughput values (B.A.T.M.A.N. V) are reduced when they are forwarded. One of the reductions is the penalty for traversing an additional hop. This hop_penalty (0-255) defines the percentage of reduction (0-100%).
The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the configuration of this feature using the u8 BATADV_ATTR_HOP_PENALTY attribute.
Signed-off-by: Sven Eckelmann sven@narfation.org
bb219831921415a32b2fad132c163ef82fad1e33 include/uapi/linux/batman_adv.h | 6 ++++++ net/batman-adv/netlink.c | 11 +++++++++++ 2 files changed, 17 insertions(+)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 165272be..b37cb923 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -443,6 +443,12 @@ enum batadv_nl_attrs { */ BATADV_ATTR_GW_SEL_CLASS,
+ /** + * @BATADV_ATTR_HOP_PENALTY: defines the penalty which will be applied + * to an originator message's tq-field on every hop. + */ + BATADV_ATTR_HOP_PENALTY, + /* 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 473467af..ce6e6f07 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -152,6 +152,7 @@ static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { [BATADV_ATTR_GW_BANDWIDTH_UP] = { .type = NLA_U32 }, [BATADV_ATTR_GW_MODE] = { .type = NLA_U8 }, [BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 }, + [BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 }, };
/** @@ -330,6 +331,10 @@ static int batadv_netlink_mesh_fill(struct sk_buff *msg, goto nla_put_failure; }
+ if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY, + atomic_read(&bat_priv->hop_penalty))) + goto nla_put_failure; + if (primary_if) batadv_hardif_put(primary_if);
@@ -536,6 +541,12 @@ static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info) } }
+ if (info->attrs[BATADV_ATTR_HOP_PENALTY]) { + attr = info->attrs[BATADV_ATTR_HOP_PENALTY]; + + atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr)); + } + batadv_netlink_notify_mesh(bat_priv);
return 0;