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/* Copyright (C) 2013-2016 B.A.T.M.A.N. contributors:
*
* Linus Lüssing, Marek Lindner
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "bat_algo.h"
#include "main.h"
#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/cache.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include "bat_v_elp.h"
#include "bat_v_ogm.h"
#include "originator.h"
#include "packet.h"
static int batadv_v_iface_enable(struct batadv_hard_iface *hard_iface)
{
int ret;
ret = batadv_v_elp_iface_enable(hard_iface);
if (ret < 0)
return ret;
ret = batadv_v_ogm_iface_enable(hard_iface);
if (ret < 0)
batadv_v_elp_iface_disable(hard_iface);
/* enable link throughput auto-detection by setting the throughput
* override to zero
*/
atomic_set(&hard_iface->bat_v.throughput_override, 0);
return ret;
}
static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface)
{
batadv_v_elp_iface_disable(hard_iface);
}
static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface)
{
}
static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface)
{
batadv_v_elp_primary_iface_set(hard_iface);
batadv_v_ogm_primary_iface_set(hard_iface);
}
static void
batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh)
{
ewma_throughput_init(&hardif_neigh->bat_v.throughput);
INIT_WORK(&hardif_neigh->bat_v.metric_work,
batadv_v_elp_throughput_metric_update);
}
static void batadv_v_ogm_schedule(struct batadv_hard_iface *hard_iface)
{
}
static void batadv_v_ogm_emit(struct batadv_forw_packet *forw_packet)
{
}
static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1,
struct batadv_hard_iface *if_outgoing1,
struct batadv_neigh_node *neigh2,
struct batadv_hard_iface *if_outgoing2)
{
struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
if (WARN_ON(!ifinfo1 || !ifinfo2))
return 0;
return ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput;
}
static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1,
struct batadv_hard_iface *if_outgoing1,
struct batadv_neigh_node *neigh2,
struct batadv_hard_iface *if_outgoing2)
{
struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
u32 threshold;
ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
threshold = ifinfo1->bat_v.throughput / 4;
threshold = ifinfo1->bat_v.throughput - threshold;
return ifinfo2->bat_v.throughput > threshold;
}
static struct batadv_algo_ops batadv_batman_v __read_mostly = {
.name = "BATMAN_V",
.bat_iface_enable = batadv_v_iface_enable,
.bat_iface_disable = batadv_v_iface_disable,
.bat_iface_update_mac = batadv_v_iface_update_mac,
.bat_primary_iface_set = batadv_v_primary_iface_set,
.bat_hardif_neigh_init = batadv_v_hardif_neigh_init,
.bat_ogm_emit = batadv_v_ogm_emit,
.bat_ogm_schedule = batadv_v_ogm_schedule,
.bat_neigh_cmp = batadv_v_neigh_cmp,
.bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob,
};
/**
* batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a
* mesh
* @bat_priv: the object representing the mesh interface to initialise
*
* Return: 0 on success or a negative error code otherwise
*/
int batadv_v_mesh_init(struct batadv_priv *bat_priv)
{
return batadv_v_ogm_init(bat_priv);
}
/**
* batadv_v_mesh_free - free the B.A.T.M.A.N. V private resources for a mesh
* @bat_priv: the object representing the mesh interface to free
*/
void batadv_v_mesh_free(struct batadv_priv *bat_priv)
{
batadv_v_ogm_free(bat_priv);
}
/**
* batadv_v_init - B.A.T.M.A.N. V initialization function
*
* Description: Takes care of initializing all the subcomponents.
* It is invoked upon module load only.
*
* Return: 0 on success or a negative error code otherwise
*/
int __init batadv_v_init(void)
{
int ret;
/* B.A.T.M.A.N. V echo location protocol packet */
ret = batadv_recv_handler_register(BATADV_ELP,
batadv_v_elp_packet_recv);
if (ret < 0)
return ret;
ret = batadv_recv_handler_register(BATADV_OGM2,
batadv_v_ogm_packet_recv);
if (ret < 0)
goto elp_unregister;
ret = batadv_algo_register(&batadv_batman_v);
if (ret < 0)
goto ogm_unregister;
return ret;
ogm_unregister:
batadv_recv_handler_unregister(BATADV_OGM2);
elp_unregister:
batadv_recv_handler_unregister(BATADV_ELP);
return ret;
}
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