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authorAntonio Quartulli <antonio@open-mesh.com>2013-09-02 14:15:04 +0400
committerAntonio Quartulli <antonio@meshcoding.com>2013-10-23 17:33:10 +0400
commita3285a8f20dace536ecc6a2f349150ea1d0bb391 (patch)
treed4cd1de827c780d4226d5f9b2f5018d5edd6a4ed /net/batman-adv
parent737a2a229774ef983ef783149384bae3e3aa38ac (diff)
downloadlinux-a3285a8f20dace536ecc6a2f349150ea1d0bb391.tar.xz
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>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/bat_iv_ogm.c20
-rw-r--r--net/batman-adv/main.c3
-rw-r--r--net/batman-adv/types.h3
3 files changed, 25 insertions, 1 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 4aabd554ca75..b288d90855d1 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -1475,6 +1475,25 @@ next:
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,
};
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 3159a148c1ac..1f2f1ac67a4c 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -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;
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 72fd617b2e73..7a00932a55bd 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -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);
};