batman-adv: add infrastructure to change routing algorithm at runtime

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>

1 files changed, 72 insertions, 0 deletions

diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 71b56cf9cdd6..7c87a341f29f 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -32,11 +32,14 @@
 #include "gateway_client.h"
 #include "vis.h"
 #include "hash.h"
+#include "bat_algo.h"
 
 
 /* List manipulations on hardif_list have to be rtnl_lock()'ed,
  * list traversals just rcu-locked */
 struct list_head hardif_list;
+char bat_routing_algo[20] = "BATMAN IV";
+static struct hlist_head bat_algo_list;
 
 unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 
@@ -45,6 +48,9 @@ struct workqueue_struct *bat_event_workqueue;
 static int __init batman_init(void)
 {
         INIT_LIST_HEAD(&hardif_list);
+        INIT_HLIST_HEAD(&bat_algo_list);
+
+        bat_iv_init();
 
         /* the name should not be longer than 10 chars - see
          * http://lwn.net/Articles/23634/ */
@@ -172,6 +178,72 @@ int is_my_mac(const uint8_t *addr)
         return 0;
 }
 
+static struct bat_algo_ops *bat_algo_get(char *name)
+{
+        struct bat_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp;
+        struct hlist_node *node;
+
+        hlist_for_each_entry(bat_algo_ops_tmp, node, &bat_algo_list, list) {
+                if (strcmp(bat_algo_ops_tmp->name, name) != 0)
+                        continue;
+
+                bat_algo_ops = bat_algo_ops_tmp;
+                break;
+        }
+
+        return bat_algo_ops;
+}
+
+int bat_algo_register(struct bat_algo_ops *bat_algo_ops)
+{
+        struct bat_algo_ops *bat_algo_ops_tmp;
+        int ret = -1;
+
+        bat_algo_ops_tmp = bat_algo_get(bat_algo_ops->name);
+        if (bat_algo_ops_tmp) {
+                pr_info("Trying to register already registered routing "
+                        "algorithm: %s\n", bat_algo_ops->name);
+                goto out;
+        }
+
+        INIT_HLIST_NODE(&bat_algo_ops->list);
+        hlist_add_head(&bat_algo_ops->list, &bat_algo_list);
+        ret = 0;
+
+out:
+        return ret;
+}
+
+int bat_algo_select(struct bat_priv *bat_priv, char *name)
+{
+        struct bat_algo_ops *bat_algo_ops;
+        int ret = -1;
+
+        bat_algo_ops = bat_algo_get(name);
+        if (!bat_algo_ops)
+                goto out;
+
+        bat_priv->bat_algo_ops = bat_algo_ops;
+        ret = 0;
+
+out:
+        return ret;
+}
+
+int bat_algo_seq_print_text(struct seq_file *seq, void *offset)
+{
+        struct bat_algo_ops *bat_algo_ops;
+        struct hlist_node *node;
+
+        seq_printf(seq, "Available routing algorithms:\n");
+
+        hlist_for_each_entry(bat_algo_ops, node, &bat_algo_list, list) {
+                seq_printf(seq, "%s\n", bat_algo_ops->name);
+        }
+
+        return 0;
+}
+
 module_init(batman_init);
 module_exit(batman_exit);