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batman-adv: add bat_neigh_cmp API function 

This new API allows to compare the two neighbours based on
the metric avoiding the user to deal with any routing
algorithm specific detail

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
This commit is contained in:
Antonio Quartulli 2013-09-02 12:15:04 +02:00 committed by Antonio Quartulli
parent 737a2a2297
commit a3285a8f20
3 changed files with 25 additions and 1 deletions
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20
net/batman-adv/bat_iv_ogm.c
View File

@ -1475,6 +1475,25 @@ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv,
seq_puts(seq, "No batman nodes in range ...\n");
}
/**
* batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors
* @neigh1: the first neighbor object of the comparison
* @neigh2: the second neighbor object of the comparison
*
* Returns a value less, equal to or greater than 0 if the metric via neigh1 is
* lower, the same as or higher than the metric via neigh2
*/
static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1,
struct batadv_neigh_node *neigh2)
{
uint8_t tq1, tq2;
tq1 = neigh1->bat_iv.tq_avg;
tq2 = neigh2->bat_iv.tq_avg;
return tq1 - tq2;
}
static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
.name = "BATMAN_IV",
.bat_iface_enable = batadv_iv_ogm_iface_enable,
@ -1483,6 +1502,7 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
.bat_primary_iface_set = batadv_iv_ogm_primary_iface_set,
.bat_ogm_schedule = batadv_iv_ogm_schedule,
.bat_ogm_emit = batadv_iv_ogm_emit,
.bat_neigh_cmp = batadv_iv_ogm_neigh_cmp,
.bat_orig_print = batadv_iv_ogm_orig_print,
};

3
net/batman-adv/main.c
View File

@ -501,7 +501,8 @@ int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops)
!bat_algo_ops->bat_iface_update_mac ||
!bat_algo_ops->bat_primary_iface_set ||
!bat_algo_ops->bat_ogm_schedule ||
!bat_algo_ops->bat_ogm_emit) {
!bat_algo_ops->bat_ogm_emit ||
!bat_algo_ops->bat_neigh_cmp) {
pr_info("Routing algo '%s' does not implement required ops\n",
bat_algo_ops->name);
ret = -EINVAL;

3
net/batman-adv/types.h
View File

@ -992,6 +992,7 @@ struct batadv_forw_packet {
* @bat_primary_iface_set: called when primary interface is selected / changed
* @bat_ogm_schedule: prepare a new outgoing OGM for the send queue
* @bat_ogm_emit: send scheduled OGM
* @bat_neigh_cmp: compare the metrics of two neighbors
* @bat_orig_print: print the originator table (optional)
*/
struct batadv_algo_ops {
@ -1003,6 +1004,8 @@ struct batadv_algo_ops {
void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
int (*bat_neigh_cmp)(struct batadv_neigh_node *neigh1,
struct batadv_neigh_node *neigh2);
/* orig_node handling API */
void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq);
};