Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge

Documentation/ABI/testing/sysfs-class-net-mesh

@@ -65,6 +65,13 @@ Description:
 		Defines the penalty which will be applied to an
 		originator message's tq-field on every hop.
 
+What:		/sys/class/net/<mesh_iface>/mesh/routing_algo
+Date:		Dec 2011
+Contact:	Marek Lindner <lindner_marek@yahoo.de>
+Description:
+		Defines the routing procotol this mesh instance
+		uses to find the optimal paths through the mesh.
+
 What:           /sys/class/net/<mesh_iface>/mesh/vis_mode
 Date:           May 2010
 Contact:        Marek Lindner <lindner_marek@yahoo.de>

net/batman-adv/bat_ogm.h → net/batman-adv/bat_algo.h

 /*
- * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
+ * Copyright (C) 2011 B.A.T.M.A.N. contributors:
  *
- * Marek Lindner, Simon Wunderlich
+ * 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
@@ -19,17 +19,9 @@
  *
  */
 
-#ifndef _NET_BATMAN_ADV_OGM_H_
-#define _NET_BATMAN_ADV_OGM_H_
+#ifndef _NET_BATMAN_ADV_BAT_ALGO_H_
+#define _NET_BATMAN_ADV_BAT_ALGO_H_
 
-#include "main.h"
+int bat_iv_init(void);
 
-void bat_ogm_init(struct hard_iface *hard_iface);
-void bat_ogm_init_primary(struct hard_iface *hard_iface);
-void bat_ogm_update_mac(struct hard_iface *hard_iface);
-void bat_ogm_schedule(struct hard_iface *hard_iface, int tt_num_changes);
-void bat_ogm_emit(struct forw_packet *forw_packet);
-void bat_ogm_receive(const struct ethhdr *ethhdr, unsigned char *packet_buff,
-		     int packet_len, struct hard_iface *if_incoming);
-
-#endif /* _NET_BATMAN_ADV_OGM_H_ */
+#endif /* _NET_BATMAN_ADV_BAT_ALGO_H_ */

net/batman-adv/bat_debugfs.c

@@ -221,6 +221,11 @@ static void debug_log_cleanup(struct bat_priv *bat_priv)
 }
 #endif
 
+static int bat_algorithms_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, bat_algo_seq_print_text, NULL);
+}
+
 static int originators_open(struct inode *inode, struct file *file)
 {
 	struct net_device *net_dev = (struct net_device *)inode->i_private;
@@ -274,6 +279,7 @@ struct bat_debuginfo bat_debuginfo_##_name = {	\
 		}				\
 };
 
+static BAT_DEBUGINFO(routing_algos, S_IRUGO, bat_algorithms_open);
 static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
 static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open);
 static BAT_DEBUGINFO(softif_neigh, S_IRUGO, softif_neigh_open);
@@ -293,9 +299,25 @@ static struct bat_debuginfo *mesh_debuginfos[] = {
 
 void debugfs_init(void)
 {
+	struct bat_debuginfo *bat_debug;
+	struct dentry *file;
+
 	bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL);
 	if (bat_debugfs == ERR_PTR(-ENODEV))
 		bat_debugfs = NULL;
+
+	if (!bat_debugfs)
+		goto out;
+
+	bat_debug = &bat_debuginfo_routing_algos;
+	file = debugfs_create_file(bat_debug->attr.name,
+				   S_IFREG | bat_debug->attr.mode,
+				   bat_debugfs, NULL, &bat_debug->fops);
+	if (!file)
+		pr_err("Can't add debugfs file: %s\n", bat_debug->attr.name);
+
+out:
+	return;
 }
 
 void debugfs_destroy(void)

net/batman-adv/bat_iv_ogm.c

@@ -20,7 +20,6 @@
  */
 
 #include "main.h"
-#include "bat_ogm.h"
 #include "translation-table.h"
 #include "ring_buffer.h"
 #include "originator.h"
@@ -29,8 +28,9 @@
 #include "gateway_client.h"
 #include "hard-interface.h"
 #include "send.h"
+#include "bat_algo.h"
 
-void bat_ogm_init(struct hard_iface *hard_iface)
+static void bat_iv_ogm_init(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
 
@@ -38,25 +38,25 @@ void bat_ogm_init(struct hard_iface *hard_iface)
 	hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC);
 
 	batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
-	batman_ogm_packet->packet_type = BAT_OGM;
-	batman_ogm_packet->version = COMPAT_VERSION;
+	batman_ogm_packet->header.packet_type = BAT_OGM;
+	batman_ogm_packet->header.version = COMPAT_VERSION;
+	batman_ogm_packet->header.ttl = 2;
 	batman_ogm_packet->flags = NO_FLAGS;
-	batman_ogm_packet->ttl = 2;
 	batman_ogm_packet->tq = TQ_MAX_VALUE;
 	batman_ogm_packet->tt_num_changes = 0;
 	batman_ogm_packet->ttvn = 0;
 }
 
-void bat_ogm_init_primary(struct hard_iface *hard_iface)
+static void bat_iv_ogm_init_primary(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
 
 	batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
 	batman_ogm_packet->flags = PRIMARIES_FIRST_HOP;
-	batman_ogm_packet->ttl = TTL;
+	batman_ogm_packet->header.ttl = TTL;
 }
 
-void bat_ogm_update_mac(struct hard_iface *hard_iface)
+static void bat_iv_ogm_update_mac(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
 
@@ -68,7 +68,7 @@ void bat_ogm_update_mac(struct hard_iface *hard_iface)
 }
 
 /* when do we schedule our own ogm to be sent */
-static unsigned long bat_ogm_emit_send_time(const struct bat_priv *bat_priv)
+static unsigned long bat_iv_ogm_emit_send_time(const struct bat_priv *bat_priv)
 {
 	return jiffies + msecs_to_jiffies(
 		   atomic_read(&bat_priv->orig_interval) -
@@ -76,7 +76,7 @@ static unsigned long bat_ogm_emit_send_time(const struct bat_priv *bat_priv)
 }
 
 /* when do we schedule a ogm packet to be sent */
-static unsigned long bat_ogm_fwd_send_time(void)
+static unsigned long bat_iv_ogm_fwd_send_time(void)
 {
 	return jiffies + msecs_to_jiffies(random32() % (JITTER/2));
 }
@@ -89,8 +89,8 @@ static uint8_t hop_penalty(uint8_t tq, const struct bat_priv *bat_priv)
 }
 
 /* is there another aggregated packet here? */
-static int bat_ogm_aggr_packet(int buff_pos, int packet_len,
-			       int tt_num_changes)
+static int bat_iv_ogm_aggr_packet(int buff_pos, int packet_len,
+				  int tt_num_changes)
 {
 	int next_buff_pos = buff_pos + BATMAN_OGM_LEN + tt_len(tt_num_changes);
 
@@ -99,8 +99,8 @@ static int bat_ogm_aggr_packet(int buff_pos, int packet_len,
 }
 
 /* send a batman ogm to a given interface */
-static void bat_ogm_send_to_if(struct forw_packet *forw_packet,
-			       struct hard_iface *hard_iface)
+static void bat_iv_ogm_send_to_if(struct forw_packet *forw_packet,
+				  struct hard_iface *hard_iface)
 {
 	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	char *fwd_str;
@@ -117,8 +117,8 @@ static void bat_ogm_send_to_if(struct forw_packet *forw_packet,
 	batman_ogm_packet = (struct batman_ogm_packet *)forw_packet->skb->data;
 
 	/* adjust all flags and log packets */
-	while (bat_ogm_aggr_packet(buff_pos, forw_packet->packet_len,
-				   batman_ogm_packet->tt_num_changes)) {
+	while (bat_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len,
+				      batman_ogm_packet->tt_num_changes)) {
 
 		/* we might have aggregated direct link packets with an
 		 * ordinary base packet */
@@ -137,7 +137,7 @@ static void bat_ogm_send_to_if(struct forw_packet *forw_packet,
 			fwd_str, (packet_num > 0 ? "aggregated " : ""),
 			batman_ogm_packet->orig,
 			ntohl(batman_ogm_packet->seqno),
-			batman_ogm_packet->tq, batman_ogm_packet->ttl,
+			batman_ogm_packet->tq, batman_ogm_packet->header.ttl,
 			(batman_ogm_packet->flags & DIRECTLINK ?
 			 "on" : "off"),
 			batman_ogm_packet->ttvn, hard_iface->net_dev->name,
@@ -157,7 +157,7 @@ static void bat_ogm_send_to_if(struct forw_packet *forw_packet,
 }
 
 /* send a batman ogm packet */
-void bat_ogm_emit(struct forw_packet *forw_packet)
+static void bat_iv_ogm_emit(struct forw_packet *forw_packet)
 {
 	struct hard_iface *hard_iface;
 	struct net_device *soft_iface;
@@ -188,7 +188,7 @@ void bat_ogm_emit(struct forw_packet *forw_packet)
 
 	/* multihomed peer assumed */
 	/* non-primary OGMs are only broadcasted on their interface */
-	if ((directlink && (batman_ogm_packet->ttl == 1)) ||
+	if ((directlink && (batman_ogm_packet->header.ttl == 1)) ||
 	    (forw_packet->own && (forw_packet->if_incoming != primary_if))) {
 
 		/* FIXME: what about aggregated packets ? */
@@ -198,7 +198,7 @@ void bat_ogm_emit(struct forw_packet *forw_packet)
 			(forw_packet->own ? "Sending own" : "Forwarding"),
 			batman_ogm_packet->orig,
 			ntohl(batman_ogm_packet->seqno),
-			batman_ogm_packet->ttl,
+			batman_ogm_packet->header.ttl,
 			forw_packet->if_incoming->net_dev->name,
 			forw_packet->if_incoming->net_dev->dev_addr);
 
@@ -216,7 +216,7 @@ void bat_ogm_emit(struct forw_packet *forw_packet)
 		if (hard_iface->soft_iface != soft_iface)
 			continue;
 
-		bat_ogm_send_to_if(forw_packet, hard_iface);
+		bat_iv_ogm_send_to_if(forw_packet, hard_iface);
 	}
 	rcu_read_unlock();
 
@@ -226,13 +226,13 @@ void bat_ogm_emit(struct forw_packet *forw_packet)
 }
 
 /* return true if new_packet can be aggregated with forw_packet */
-static bool bat_ogm_can_aggregate(const struct batman_ogm_packet
+static bool bat_iv_ogm_can_aggregate(const struct batman_ogm_packet
 							*new_batman_ogm_packet,
-				  struct bat_priv *bat_priv,
-				  int packet_len, unsigned long send_time,
-				  bool directlink,
-				  const struct hard_iface *if_incoming,
-				  const struct forw_packet *forw_packet)
+				     struct bat_priv *bat_priv,
+				     int packet_len, unsigned long send_time,
+				     bool directlink,
+				     const struct hard_iface *if_incoming,
+				     const struct forw_packet *forw_packet)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
 	int aggregated_bytes = forw_packet->packet_len + packet_len;
@@ -272,7 +272,7 @@ static bool bat_ogm_can_aggregate(const struct batman_ogm_packet
 		 * are flooded through the net  */
 		if ((!directlink) &&
 		    (!(batman_ogm_packet->flags & DIRECTLINK)) &&
-		    (batman_ogm_packet->ttl != 1) &&
+		    (batman_ogm_packet->header.ttl != 1) &&
 
 		    /* own packets originating non-primary
 		     * interfaces leave only that interface */
@@ -285,7 +285,7 @@ static bool bat_ogm_can_aggregate(const struct batman_ogm_packet
 		/* if the incoming packet is sent via this one
 		 * interface only - we still can aggregate */
 		if ((directlink) &&
-		    (new_batman_ogm_packet->ttl == 1) &&
+		    (new_batman_ogm_packet->header.ttl == 1) &&
 		    (forw_packet->if_incoming == if_incoming) &&
 
 		    /* packets from direct neighbors or
@@ -306,11 +306,11 @@ static bool bat_ogm_can_aggregate(const struct batman_ogm_packet
 }
 
 /* create a new aggregated packet and add this packet to it */
-static void bat_ogm_aggregate_new(const unsigned char *packet_buff,
-				  int packet_len, unsigned long send_time,
-				  bool direct_link,
-				  struct hard_iface *if_incoming,
-				  int own_packet)
+static void bat_iv_ogm_aggregate_new(const unsigned char *packet_buff,
+				     int packet_len, unsigned long send_time,
+				     bool direct_link,
+				     struct hard_iface *if_incoming,
+				     int own_packet)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	struct forw_packet *forw_packet_aggr;
@@ -385,9 +385,9 @@ static void bat_ogm_aggregate_new(const unsigned char *packet_buff,
 }
 
 /* aggregate a new packet into the existing ogm packet */
-static void bat_ogm_aggregate(struct forw_packet *forw_packet_aggr,
-			      const unsigned char *packet_buff,
-			      int packet_len, bool direct_link)
+static void bat_iv_ogm_aggregate(struct forw_packet *forw_packet_aggr,
+				 const unsigned char *packet_buff,
+				 int packet_len, bool direct_link)
 {
 	unsigned char *skb_buff;
 
@@ -402,10 +402,10 @@ static void bat_ogm_aggregate(struct forw_packet *forw_packet_aggr,
 			(1 << forw_packet_aggr->num_packets);
 }
 
-static void bat_ogm_queue_add(struct bat_priv *bat_priv,
-			      unsigned char *packet_buff,
-			      int packet_len, struct hard_iface *if_incoming,
-			      int own_packet, unsigned long send_time)
+static void bat_iv_ogm_queue_add(struct bat_priv *bat_priv,
+				 unsigned char *packet_buff,
+				 int packet_len, struct hard_iface *if_incoming,
+				 int own_packet, unsigned long send_time)
 {
 	/**
 	 * _aggr -> pointer to the packet we want to aggregate with
@@ -425,11 +425,11 @@ static void bat_ogm_queue_add(struct bat_priv *bat_priv,
 	if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) {
 		hlist_for_each_entry(forw_packet_pos, tmp_node,
 				     &bat_priv->forw_bat_list, list) {
-			if (bat_ogm_can_aggregate(batman_ogm_packet,
-						  bat_priv, packet_len,
-						  send_time, direct_link,
-						  if_incoming,
-						  forw_packet_pos)) {
+			if (bat_iv_ogm_can_aggregate(batman_ogm_packet,
+						     bat_priv, packet_len,
+						     send_time, direct_link,
+						     if_incoming,
+						     forw_packet_pos)) {
 				forw_packet_aggr = forw_packet_pos;
 				break;
 			}
@@ -451,27 +451,27 @@ static void bat_ogm_queue_add(struct bat_priv *bat_priv,
 		    (atomic_read(&bat_priv->aggregated_ogms)))
 			send_time += msecs_to_jiffies(MAX_AGGREGATION_MS);
 
-		bat_ogm_aggregate_new(packet_buff, packet_len,
-				      send_time, direct_link,
-				      if_incoming, own_packet);
+		bat_iv_ogm_aggregate_new(packet_buff, packet_len,
+					 send_time, direct_link,
+					 if_incoming, own_packet);
 	} else {
-		bat_ogm_aggregate(forw_packet_aggr, packet_buff, packet_len,
-				  direct_link);
+		bat_iv_ogm_aggregate(forw_packet_aggr, packet_buff,
+				     packet_len, direct_link);
 		spin_unlock_bh(&bat_priv->forw_bat_list_lock);
 	}
 }
 
-static void bat_ogm_forward(struct orig_node *orig_node,
-			    const struct ethhdr *ethhdr,
-			    struct batman_ogm_packet *batman_ogm_packet,
-			    int directlink, struct hard_iface *if_incoming)
+static void bat_iv_ogm_forward(struct orig_node *orig_node,
+			       const struct ethhdr *ethhdr,
+			       struct batman_ogm_packet *batman_ogm_packet,
+			       int directlink, struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	struct neigh_node *router;
 	uint8_t in_tq, in_ttl, tq_avg = 0;
 	uint8_t tt_num_changes;
 
-	if (batman_ogm_packet->ttl <= 1) {
+	if (batman_ogm_packet->header.ttl <= 1) {
 		bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n");
 		return;
 	}
@@ -479,10 +479,10 @@ static void bat_ogm_forward(struct orig_node *orig_node,
 	router = orig_node_get_router(orig_node);
 
 	in_tq = batman_ogm_packet->tq;
-	in_ttl = batman_ogm_packet->ttl;
+	in_ttl = batman_ogm_packet->header.ttl;
 	tt_num_changes = batman_ogm_packet->tt_num_changes;
 
-	batman_ogm_packet->ttl--;
+	batman_ogm_packet->header.ttl--;
 	memcpy(batman_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN);
 
 	/* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast
@@ -494,7 +494,8 @@ static void bat_ogm_forward(struct orig_node *orig_node,
 			batman_ogm_packet->tq = router->tq_avg;
 
 			if (router->last_ttl)
-				batman_ogm_packet->ttl = router->last_ttl - 1;
+				batman_ogm_packet->header.ttl =
+					router->last_ttl - 1;
 		}
 
 		tq_avg = router->tq_avg;
@@ -510,7 +511,7 @@ static void bat_ogm_forward(struct orig_node *orig_node,
 		"Forwarding packet: tq_orig: %i, tq_avg: %i, "
 		"tq_forw: %i, ttl_orig: %i, ttl_forw: %i\n",
 		in_tq, tq_avg, batman_ogm_packet->tq, in_ttl - 1,
-		batman_ogm_packet->ttl);
+		batman_ogm_packet->header.ttl);
 
 	batman_ogm_packet->seqno = htonl(batman_ogm_packet->seqno);
 	batman_ogm_packet->tt_crc = htons(batman_ogm_packet->tt_crc);
@@ -522,12 +523,13 @@ static void bat_ogm_forward(struct orig_node *orig_node,
 	else
 		batman_ogm_packet->flags &= ~DIRECTLINK;
 
-	bat_ogm_queue_add(bat_priv, (unsigned char *)batman_ogm_packet,
-			  BATMAN_OGM_LEN + tt_len(tt_num_changes),
-			  if_incoming, 0, bat_ogm_fwd_send_time());
+	bat_iv_ogm_queue_add(bat_priv, (unsigned char *)batman_ogm_packet,
+			     BATMAN_OGM_LEN + tt_len(tt_num_changes),
+			     if_incoming, 0, bat_iv_ogm_fwd_send_time());
 }
 
-void bat_ogm_schedule(struct hard_iface *hard_iface, int tt_num_changes)
+static void bat_iv_ogm_schedule(struct hard_iface *hard_iface,
+				int tt_num_changes)
 {
 	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	struct batman_ogm_packet *batman_ogm_packet;
@@ -564,21 +566,22 @@ void bat_ogm_schedule(struct hard_iface *hard_iface, int tt_num_changes)
 	atomic_inc(&hard_iface->seqno);
 
 	slide_own_bcast_window(hard_iface);
-	bat_ogm_queue_add(bat_priv, hard_iface->packet_buff,
-			  hard_iface->packet_len, hard_iface, 1,
-			  bat_ogm_emit_send_time(bat_priv));
+	bat_iv_ogm_queue_add(bat_priv, hard_iface->packet_buff,
+			     hard_iface->packet_len, hard_iface, 1,
+			     bat_iv_ogm_emit_send_time(bat_priv));
 
 	if (primary_if)
 		hardif_free_ref(primary_if);
 }
 
-static void bat_ogm_orig_update(struct bat_priv *bat_priv,
-				struct orig_node *orig_node,
-				const struct ethhdr *ethhdr,
-				const struct batman_ogm_packet
+static void bat_iv_ogm_orig_update(struct bat_priv *bat_priv,
+				   struct orig_node *orig_node,
+				   const struct ethhdr *ethhdr,
+				   const struct batman_ogm_packet
 							*batman_ogm_packet,
-				struct hard_iface *if_incoming,
-				const unsigned char *tt_buff, int is_duplicate)
+				   struct hard_iface *if_incoming,
+				   const unsigned char *tt_buff,
+				   int is_duplicate)
 {
 	struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
 	struct neigh_node *router = NULL;
@@ -642,8 +645,8 @@ static void bat_ogm_orig_update(struct bat_priv *bat_priv,
 	spin_unlock_bh(&neigh_node->tq_lock);
 
 	if (!is_duplicate) {
-		orig_node->last_ttl = batman_ogm_packet->ttl;
-		neigh_node->last_ttl = batman_ogm_packet->ttl;
+		orig_node->last_ttl = batman_ogm_packet->header.ttl;
+		neigh_node->last_ttl = batman_ogm_packet->header.ttl;
 	}
 
 	bonding_candidate_add(orig_node, neigh_node);
@@ -683,7 +686,7 @@ static void bat_ogm_orig_update(struct bat_priv *bat_priv,
 	/* I have to check for transtable changes only if the OGM has been
 	 * sent through a primary interface */
 	if (((batman_ogm_packet->orig != ethhdr->h_source) &&
-	     (batman_ogm_packet->ttl > 2)) ||
+	     (batman_ogm_packet->header.ttl > 2)) ||
 	    (batman_ogm_packet->flags & PRIMARIES_FIRST_HOP))
 		tt_update_orig(bat_priv, orig_node, tt_buff,
 			       batman_ogm_packet->tt_num_changes,
@@ -713,10 +716,10 @@ static void bat_ogm_orig_update(struct bat_priv *bat_priv,
 		neigh_node_free_ref(router);
 }
 
-static int bat_ogm_calc_tq(struct orig_node *orig_node,
-			   struct orig_node *orig_neigh_node,
-			   struct batman_ogm_packet *batman_ogm_packet,
-			   struct hard_iface *if_incoming)
+static int bat_iv_ogm_calc_tq(struct orig_node *orig_node,
+			      struct orig_node *orig_neigh_node,
+			      struct batman_ogm_packet *batman_ogm_packet,
+			      struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	struct neigh_node *neigh_node = NULL, *tmp_neigh_node;
@@ -825,10 +828,10 @@ static int bat_ogm_calc_tq(struct orig_node *orig_node,
  *  -1 the packet is old and has been received while the seqno window
  *     was protected. Caller should drop it.
  */
-static int bat_ogm_update_seqnos(const struct ethhdr *ethhdr,
-				 const struct batman_ogm_packet
+static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
+				    const struct batman_ogm_packet
 							*batman_ogm_packet,
-				 const struct hard_iface *if_incoming)
+				    const struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	struct orig_node *orig_node;
@@ -890,10 +893,10 @@ static int bat_ogm_update_seqnos(const struct ethhdr *ethhdr,
 	return ret;
 }
 
-static void bat_ogm_process(const struct ethhdr *ethhdr,
-			    struct batman_ogm_packet *batman_ogm_packet,
-			    const unsigned char *tt_buff,
-			    struct hard_iface *if_incoming)
+static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
+			       struct batman_ogm_packet *batman_ogm_packet,
+			       const unsigned char *tt_buff,
+			       struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	struct hard_iface *hard_iface;
@@ -918,7 +921,7 @@ static void bat_ogm_process(const struct ethhdr *ethhdr,
 	 * packet in an aggregation.  Here we expect that the padding
 	 * is always zero (or not 0x01)
 	 */
-	if (batman_ogm_packet->packet_type != BAT_OGM)
+	if (batman_ogm_packet->header.packet_type != BAT_OGM)
 		return;
 
 	/* could be changed by schedule_own_packet() */
@@ -938,8 +941,8 @@ static void bat_ogm_process(const struct ethhdr *ethhdr,
 		batman_ogm_packet->prev_sender, batman_ogm_packet->seqno,
 		batman_ogm_packet->ttvn, batman_ogm_packet->tt_crc,
 		batman_ogm_packet->tt_num_changes, batman_ogm_packet->tq,
-		batman_ogm_packet->ttl, batman_ogm_packet->version,
-		has_directlink_flag);
+		batman_ogm_packet->header.ttl,
+		batman_ogm_packet->header.version, has_directlink_flag);
 
 	rcu_read_lock();
 	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
@@ -966,10 +969,10 @@ static void bat_ogm_process(const struct ethhdr *ethhdr,
 	}
 	rcu_read_unlock();
 
-	if (batman_ogm_packet->version != COMPAT_VERSION) {
+	if (batman_ogm_packet->header.version != COMPAT_VERSION) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: incompatible batman version (%i)\n",
-			batman_ogm_packet->version);
+			batman_ogm_packet->header.version);
 		return;
 	}
 
@@ -1031,8 +1034,8 @@ static void bat_ogm_process(const struct ethhdr *ethhdr,
 	if (!orig_node)
 		return;
 
-	is_duplicate = bat_ogm_update_seqnos(ethhdr, batman_ogm_packet,
-					     if_incoming);
+	is_duplicate = bat_iv_ogm_update_seqnos(ethhdr, batman_ogm_packet,
+						if_incoming);
 
 	if (is_duplicate == -1) {
 		bat_dbg(DBG_BATMAN, bat_priv,
@@ -1081,8 +1084,8 @@ static void bat_ogm_process(const struct ethhdr *ethhdr,
 		goto out_neigh;
 	}
 
-	is_bidirectional = bat_ogm_calc_tq(orig_node, orig_neigh_node,
-					   batman_ogm_packet, if_incoming);
+	is_bidirectional = bat_iv_ogm_calc_tq(orig_node, orig_neigh_node,
+					      batman_ogm_packet, if_incoming);
 
 	bonding_save_primary(orig_node, orig_neigh_node, batman_ogm_packet);
 
@@ -1091,17 +1094,17 @@ static void bat_ogm_process(const struct ethhdr *ethhdr,
 	if (is_bidirectional &&
 	    (!is_duplicate ||
 	     ((orig_node->last_real_seqno == batman_ogm_packet->seqno) &&
-	      (orig_node->last_ttl - 3 <= batman_ogm_packet->ttl))))
-		bat_ogm_orig_update(bat_priv, orig_node, ethhdr,
-				    batman_ogm_packet, if_incoming,
-				    tt_buff, is_duplicate);
+	      (orig_node->last_ttl - 3 <= batman_ogm_packet->header.ttl))))
+		bat_iv_ogm_orig_update(bat_priv, orig_node, ethhdr,
+				       batman_ogm_packet, if_incoming,
+				       tt_buff, is_duplicate);
 
 	/* is single hop (direct) neighbor */
 	if (is_single_hop_neigh) {
 
 		/* mark direct link on incoming interface */
-		bat_ogm_forward(orig_node, ethhdr, batman_ogm_packet,
-				1, if_incoming);
+		bat_iv_ogm_forward(orig_node, ethhdr, batman_ogm_packet,
+				   1, if_incoming);
 
 		bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
 			"rebroadcast neighbor packet with direct link flag\n");
@@ -1123,7 +1126,8 @@ static void bat_ogm_process(const struct ethhdr *ethhdr,
 
 	bat_dbg(DBG_BATMAN, bat_priv,
 		"Forwarding packet: rebroadcast originator packet\n");
-	bat_ogm_forward(orig_node, ethhdr, batman_ogm_packet, 0, if_incoming);
+	bat_iv_ogm_forward(orig_node, ethhdr, batman_ogm_packet,
+			   0, if_incoming);
 
 out_neigh:
 	if ((orig_neigh_node) && (!is_single_hop_neigh))
@@ -1139,13 +1143,17 @@ static void bat_ogm_process(const struct ethhdr *ethhdr,
 	orig_node_free_ref(orig_node);
 }
 
-void bat_ogm_receive(const struct ethhdr *ethhdr, unsigned char *packet_buff,
-		     int packet_len, struct hard_iface *if_incoming)
+static void bat_iv_ogm_receive(struct hard_iface *if_incoming,
+			       struct sk_buff *skb)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
-	int buff_pos = 0;
-	unsigned char *tt_buff;
+	struct ethhdr *ethhdr;
+	int buff_pos = 0, packet_len;
+	unsigned char *tt_buff, *packet_buff;
 
+	packet_len = skb_headlen(skb);
+	ethhdr = (struct ethhdr *)skb_mac_header(skb);
+	packet_buff = skb->data;
 	batman_ogm_packet = (struct batman_ogm_packet *)packet_buff;
 
 	/* unpack the aggregated packets and process them one by one */
@@ -1157,14 +1165,29 @@ void bat_ogm_receive(const struct ethhdr *ethhdr, unsigned char *packet_buff,
 
 		tt_buff = packet_buff + buff_pos + BATMAN_OGM_LEN;
 
-		bat_ogm_process(ethhdr, batman_ogm_packet,
-				tt_buff, if_incoming);
+		bat_iv_ogm_process(ethhdr, batman_ogm_packet,
+				   tt_buff, if_incoming);
 
 		buff_pos += BATMAN_OGM_LEN +
 				tt_len(batman_ogm_packet->tt_num_changes);
 
 		batman_ogm_packet = (struct batman_ogm_packet *)
 						(packet_buff + buff_pos);
-	} while (bat_ogm_aggr_packet(buff_pos, packet_len,
-				     batman_ogm_packet->tt_num_changes));
+	} while (bat_iv_ogm_aggr_packet(buff_pos, packet_len,
+					batman_ogm_packet->tt_num_changes));
+}
+
+static struct bat_algo_ops batman_iv __read_mostly = {
+	.name = "BATMAN IV",
+	.bat_ogm_init = bat_iv_ogm_init,
+	.bat_ogm_init_primary = bat_iv_ogm_init_primary,
+	.bat_ogm_update_mac = bat_iv_ogm_update_mac,
+	.bat_ogm_schedule = bat_iv_ogm_schedule,
+	.bat_ogm_emit = bat_iv_ogm_emit,
+	.bat_ogm_receive = bat_iv_ogm_receive,
+};
+
+int __init bat_iv_init(void)
+{
+	return bat_algo_register(&batman_iv);
 }

net/batman-adv/bat_sysfs.c

@@ -272,6 +272,13 @@ static ssize_t store_vis_mode(struct kobject *kobj, struct attribute *attr,
 	return count;
 }
 
+static ssize_t show_bat_algo(struct kobject *kobj, struct attribute *attr,
+			    char *buff)
+{
+	struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
+	return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
+}
+
 static void post_gw_deselect(struct net_device *net_dev)
 {
 	struct bat_priv *bat_priv = netdev_priv(net_dev);
@@ -382,6 +389,7 @@ BAT_ATTR_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 BAT_ATTR_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
 BAT_ATTR_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
+static BAT_ATTR(routing_algo, S_IRUGO, show_bat_algo, NULL);
 static BAT_ATTR(gw_mode, S_IRUGO | S_IWUSR, show_gw_mode, store_gw_mode);
 BAT_ATTR_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX, NULL);
 BAT_ATTR_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
@@ -399,6 +407,7 @@ static struct bat_attribute *mesh_attrs[] = {
 	&bat_attr_fragmentation,
 	&bat_attr_ap_isolation,
 	&bat_attr_vis_mode,
+	&bat_attr_routing_algo,
 	&bat_attr_gw_mode,
 	&bat_attr_orig_interval,
 	&bat_attr_hop_penalty,

net/batman-adv/hard-interface.c

@@ -28,7 +28,6 @@
 #include "bat_sysfs.h"
 #include "originator.h"
 #include "hash.h"
-#include "bat_ogm.h"
 
 #include <linux/if_arp.h>
 
@@ -147,7 +146,7 @@ static void primary_if_select(struct bat_priv *bat_priv,
 	if (!new_hard_iface)
 		return;
 
-	bat_ogm_init_primary(new_hard_iface);
+	bat_priv->bat_algo_ops->bat_ogm_init_primary(new_hard_iface);
 	primary_if_update_addr(bat_priv);
 }
 
@@ -233,7 +232,7 @@ static void hardif_activate_interface(struct hard_iface *hard_iface)
 
 	bat_priv = netdev_priv(hard_iface->soft_iface);
 
-	bat_ogm_update_mac(hard_iface);
+	bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface);
 	hard_iface->if_status = IF_TO_BE_ACTIVATED;
 
 	/**
@@ -281,6 +280,14 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
 	if (!atomic_inc_not_zero(&hard_iface->refcount))
 		goto out;
 
+	/* hard-interface is part of a bridge */
+	if (hard_iface->net_dev->priv_flags & IFF_BRIDGE_PORT)
+		pr_err("You are about to enable batman-adv on '%s' which "
+		       "already is part of a bridge. Unless you know exactly "
+		       "what you are doing this is probably wrong and won't "
+		       "work the way you think it would.\n",
+		       hard_iface->net_dev->name);
+
 	soft_iface = dev_get_by_name(&init_net, iface_name);
 
 	if (!soft_iface) {
@@ -307,7 +314,7 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
 	hard_iface->soft_iface = soft_iface;
 	bat_priv = netdev_priv(hard_iface->soft_iface);
 
-	bat_ogm_init(hard_iface);
+	bat_priv->bat_algo_ops->bat_ogm_init(hard_iface);
 
 	if (!hard_iface->packet_buff) {
 		bat_err(hard_iface->soft_iface, "Can't add interface packet "
@@ -527,9 +534,10 @@ static int hard_if_event(struct notifier_block *this,
 			goto hardif_put;
 
 		check_known_mac_addr(hard_iface->net_dev);
-		bat_ogm_update_mac(hard_iface);
 
 		bat_priv = netdev_priv(hard_iface->soft_iface);
+		bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface);
+
 		primary_if = primary_if_get_selected(bat_priv);
 		if (!primary_if)
 			goto hardif_put;
@@ -590,17 +598,17 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
 
 	batman_ogm_packet = (struct batman_ogm_packet *)skb->data;
 
-	if (batman_ogm_packet->version != COMPAT_VERSION) {
+	if (batman_ogm_packet->header.version != COMPAT_VERSION) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: incompatible batman version (%i)\n",
-			batman_ogm_packet->version);
+			batman_ogm_packet->header.version);
 		goto err_free;
 	}
 
 	/* all receive handlers return whether they received or reused
 	 * the supplied skb. if not, we have to free the skb. */
 
-	switch (batman_ogm_packet->packet_type) {
+	switch (batman_ogm_packet->header.packet_type) {
 		/* batman originator packet */
 	case BAT_OGM:
 		ret = recv_bat_ogm_packet(skb, hard_iface);

net/batman-adv/icmp_socket.c

@@ -191,7 +191,7 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
 		goto free_skb;
 	}
 
-	if (icmp_packet->packet_type != BAT_ICMP) {
+	if (icmp_packet->header.packet_type != BAT_ICMP) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Error - can't send packet from char device: "
 			"got bogus packet type (expected: BAT_ICMP)\n");
@@ -209,9 +209,9 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
 
 	icmp_packet->uid = socket_client->index;
 
-	if (icmp_packet->version != COMPAT_VERSION) {
+	if (icmp_packet->header.version != COMPAT_VERSION) {
 		icmp_packet->msg_type = PARAMETER_PROBLEM;
-		icmp_packet->version = COMPAT_VERSION;
+		icmp_packet->header.version = COMPAT_VERSION;
 		bat_socket_add_packet(socket_client, icmp_packet, packet_len);
 		goto free_skb;
 	}

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/ */
@@ -170,9 +176,110 @@ int is_my_mac(const uint8_t *addr)
 	}
 	rcu_read_unlock();
 	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;
+	}
+
+	/* all algorithms must implement all ops (for now) */
+	if (!bat_algo_ops->bat_ogm_init ||
+	    !bat_algo_ops->bat_ogm_init_primary ||
+	    !bat_algo_ops->bat_ogm_update_mac ||
+	    !bat_algo_ops->bat_ogm_schedule ||
+	    !bat_algo_ops->bat_ogm_emit ||
+	    !bat_algo_ops->bat_ogm_receive) {
+		pr_info("Routing algo '%s' does not implement required ops\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;
+}
+
+static int param_set_ra(const char *val, const struct kernel_param *kp)
+{
+	struct bat_algo_ops *bat_algo_ops;
 
+	bat_algo_ops = bat_algo_get((char *)val);
+	if (!bat_algo_ops) {
+		pr_err("Routing algorithm '%s' is not supported\n", val);
+		return -EINVAL;
+	}
+
+	return param_set_copystring(val, kp);
 }
 
+static const struct kernel_param_ops param_ops_ra = {
+	.set = param_set_ra,
+	.get = param_get_string,
+};
+
+static struct kparam_string __param_string_ra = {
+	.maxlen = sizeof(bat_routing_algo),
+	.string = bat_routing_algo,
+};
+
+module_param_cb(routing_algo, &param_ops_ra, &__param_string_ra, 0644);
 module_init(batman_init);
 module_exit(batman_exit);
 

net/batman-adv/main.h

@@ -147,6 +147,7 @@ enum dbg_level {
 #include <linux/seq_file.h>
 #include "types.h"
 
+extern char bat_routing_algo[];
 extern struct list_head hardif_list;
 
 extern unsigned char broadcast_addr[];
@@ -157,6 +158,9 @@ void mesh_free(struct net_device *soft_iface);
 void inc_module_count(void);
 void dec_module_count(void);
 int is_my_mac(const uint8_t *addr);
+int bat_algo_register(struct bat_algo_ops *bat_algo_ops);
+int bat_algo_select(struct bat_priv *bat_priv, char *name);
+int bat_algo_seq_print_text(struct seq_file *seq, void *offset);
 
 #ifdef CONFIG_BATMAN_ADV_DEBUG
 int debug_log(struct bat_priv *bat_priv, const char *fmt, ...) __printf(2, 3);
@@ -202,6 +206,17 @@ static inline int compare_eth(const void *data1, const void *data2)
 	return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
 }
 
+/**
+ * has_timed_out - compares current time (jiffies) and timestamp + timeout
+ * @timestamp:		base value to compare with (in jiffies)
+ * @timeout:		added to base value before comparing (in milliseconds)
+ *
+ * Returns true if current time is after timestamp + timeout
+ */
+static inline bool has_timed_out(unsigned long timestamp, unsigned int timeout)
+{
+	return time_is_before_jiffies(timestamp + msecs_to_jiffies(timeout));
+}
 
 #define atomic_dec_not_zero(v)	atomic_add_unless((v), -1, 0)
 

net/batman-adv/originator.c

@@ -219,6 +219,7 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, const uint8_t *addr)
 	/* extra reference for return */
 	atomic_set(&orig_node->refcount, 2);
 
+	orig_node->tt_initialised = false;
 	orig_node->tt_poss_change = false;
 	orig_node->bat_priv = bat_priv;
 	memcpy(orig_node->orig, addr, ETH_ALEN);

net/batman-adv/packet.h

@@ -90,10 +90,14 @@ enum tt_client_flags {
 	TT_CLIENT_PENDING = 1 << 10
 };
 
-struct batman_ogm_packet {
+struct batman_header {
 	uint8_t  packet_type;
 	uint8_t  version;  /* batman version field */
 	uint8_t  ttl;
+} __packed;
+
+struct batman_ogm_packet {
+	struct batman_header header;
 	uint8_t  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
 	uint32_t seqno;
 	uint8_t  orig[6];
@@ -108,9 +112,7 @@ struct batman_ogm_packet {
 #define BATMAN_OGM_LEN sizeof(struct batman_ogm_packet)
 
 struct icmp_packet {
-	uint8_t  packet_type;
-	uint8_t  version;  /* batman version field */
-	uint8_t  ttl;
+	struct batman_header header;
 	uint8_t  msg_type; /* see ICMP message types above */
 	uint8_t  dst[6];
 	uint8_t  orig[6];
@@ -124,9 +126,7 @@ struct icmp_packet {
 /* icmp_packet_rr must start with all fields from imcp_packet
  * as this is assumed by code that handles ICMP packets */
 struct icmp_packet_rr {
-	uint8_t  packet_type;
-	uint8_t  version;  /* batman version field */
-	uint8_t  ttl;
+	struct batman_header header;
 	uint8_t  msg_type; /* see ICMP message types above */
 	uint8_t  dst[6];
 	uint8_t  orig[6];
@@ -137,17 +137,13 @@ struct icmp_packet_rr {
 } __packed;
 
 struct unicast_packet {
-	uint8_t  packet_type;
-	uint8_t  version;  /* batman version field */
-	uint8_t  ttl;
+	struct batman_header header;
 	uint8_t  ttvn; /* destination translation table version number */
 	uint8_t  dest[6];
 } __packed;
 
 struct unicast_frag_packet {
-	uint8_t  packet_type;
-	uint8_t  version;  /* batman version field */
-	uint8_t  ttl;
+	struct batman_header header;
 	uint8_t  ttvn; /* destination translation table version number */
 	uint8_t  dest[6];
 	uint8_t  flags;
@@ -157,18 +153,14 @@ struct unicast_frag_packet {
 } __packed;
 
 struct bcast_packet {
-	uint8_t  packet_type;
-	uint8_t  version;  /* batman version field */
-	uint8_t  ttl;
+	struct batman_header header;
 	uint8_t  reserved;
 	uint32_t seqno;
 	uint8_t  orig[6];
 } __packed;
 
 struct vis_packet {
-	uint8_t  packet_type;
-	uint8_t  version;        /* batman version field */
-	uint8_t  ttl;		 /* TTL */
+	struct batman_header header;
 	uint8_t  vis_type;	 /* which type of vis-participant sent this? */
 	uint32_t seqno;		 /* sequence number */
 	uint8_t  entries;	 /* number of entries behind this struct */
@@ -179,9 +171,7 @@ struct vis_packet {
 } __packed;
 
 struct tt_query_packet {
-	uint8_t  packet_type;
-	uint8_t  version;  /* batman version field */
-	uint8_t  ttl;
+	struct batman_header header;
 	/* the flag field is a combination of:
 	 * - TT_REQUEST or TT_RESPONSE
 	 * - TT_FULL_TABLE */
@@ -202,9 +192,7 @@ struct tt_query_packet {
 } __packed;
 
 struct roam_adv_packet {
-	uint8_t  packet_type;
-	uint8_t  version;
-	uint8_t  ttl;
+	struct batman_header header;
 	uint8_t  reserved;
 	uint8_t  dst[ETH_ALEN];
 	uint8_t  src[ETH_ALEN];

net/batman-adv/routing.c

@@ -29,7 +29,6 @@
 #include "originator.h"
 #include "vis.h"
 #include "unicast.h"
-#include "bat_ogm.h"
 
 void slide_own_bcast_window(struct hard_iface *hard_iface)
 {
@@ -248,6 +247,7 @@ int window_protected(struct bat_priv *bat_priv, int32_t seq_num_diff,
 
 int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
 {
+	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	struct ethhdr *ethhdr;
 
 	/* drop packet if it has not necessary minimum size */
@@ -272,9 +272,7 @@ int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
 	if (skb_linearize(skb) < 0)
 		return NET_RX_DROP;
 
-	ethhdr = (struct ethhdr *)skb_mac_header(skb);
-
-	bat_ogm_receive(ethhdr, skb->data, skb_headlen(skb), hard_iface);
+	bat_priv->bat_algo_ops->bat_ogm_receive(hard_iface, skb);
 
 	kfree_skb(skb);
 	return NET_RX_SUCCESS;
@@ -320,7 +318,7 @@ static int recv_my_icmp_packet(struct bat_priv *bat_priv,
 	memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
 	memcpy(icmp_packet->orig, primary_if->net_dev->dev_addr, ETH_ALEN);
 	icmp_packet->msg_type = ECHO_REPLY;
-	icmp_packet->ttl = TTL;
+	icmp_packet->header.ttl = TTL;
 
 	send_skb_packet(skb, router->if_incoming, router->addr);
 	ret = NET_RX_SUCCESS;
@@ -376,7 +374,7 @@ static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
 	memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
 	memcpy(icmp_packet->orig, primary_if->net_dev->dev_addr, ETH_ALEN);
 	icmp_packet->msg_type = TTL_EXCEEDED;
-	icmp_packet->ttl = TTL;
+	icmp_packet->header.ttl = TTL;
 
 	send_skb_packet(skb, router->if_incoming, router->addr);
 	ret = NET_RX_SUCCESS;
@@ -441,7 +439,7 @@ int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 		return recv_my_icmp_packet(bat_priv, skb, hdr_size);
 
 	/* TTL exceeded */
-	if (icmp_packet->ttl < 2)
+	if (icmp_packet->header.ttl < 2)
 		return recv_icmp_ttl_exceeded(bat_priv, skb);
 
 	/* get routing information */
@@ -460,7 +458,7 @@ int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 	icmp_packet = (struct icmp_packet_rr *)skb->data;
 
 	/* decrement ttl */
-	icmp_packet->ttl--;
+	icmp_packet->header.ttl--;
 
 	/* route it */
 	send_skb_packet(skb, router->if_incoming, router->addr);
@@ -815,7 +813,7 @@ int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 	unicast_packet = (struct unicast_packet *)skb->data;
 
 	/* TTL exceeded */
-	if (unicast_packet->ttl < 2) {
+	if (unicast_packet->header.ttl < 2) {
 		pr_debug("Warning - can't forward unicast packet from %pM to "
 			 "%pM: ttl exceeded\n", ethhdr->h_source,
 			 unicast_packet->dest);
@@ -840,7 +838,7 @@ int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 
 	unicast_packet = (struct unicast_packet *)skb->data;
 
-	if (unicast_packet->packet_type == BAT_UNICAST &&
+	if (unicast_packet->header.packet_type == BAT_UNICAST &&
 	    atomic_read(&bat_priv->fragmentation) &&
 	    skb->len > neigh_node->if_incoming->net_dev->mtu) {
 		ret = frag_send_skb(skb, bat_priv,
@@ -848,7 +846,7 @@ int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 		goto out;
 	}
 
-	if (unicast_packet->packet_type == BAT_UNICAST_FRAG &&
+	if (unicast_packet->header.packet_type == BAT_UNICAST_FRAG &&
 	    frag_can_reassemble(skb, neigh_node->if_incoming->net_dev->mtu)) {
 
 		ret = frag_reassemble_skb(skb, bat_priv, &new_skb);
@@ -867,7 +865,7 @@ int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 	}
 
 	/* decrement ttl */
-	unicast_packet->ttl--;
+	unicast_packet->header.ttl--;
 
 	/* route it */
 	send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
@@ -1041,7 +1039,7 @@ int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 	if (is_my_mac(bcast_packet->orig))
 		goto out;
 
-	if (bcast_packet->ttl < 2)
+	if (bcast_packet->header.ttl < 2)
 		goto out;
 
 	orig_node = orig_hash_find(bat_priv, bcast_packet->orig);

net/batman-adv/send.c

@@ -28,7 +28,6 @@
 #include "vis.h"
 #include "gateway_common.h"
 #include "originator.h"
-#include "bat_ogm.h"
 
 static void send_outstanding_bcast_packet(struct work_struct *work);
 
@@ -168,7 +167,7 @@ void schedule_bat_ogm(struct hard_iface *hard_iface)
 	if (primary_if)
 		hardif_free_ref(primary_if);
 
-	bat_ogm_schedule(hard_iface, tt_num_changes);
+	bat_priv->bat_algo_ops->bat_ogm_schedule(hard_iface, tt_num_changes);
 }
 
 static void forw_packet_free(struct forw_packet *forw_packet)
@@ -234,7 +233,7 @@ int add_bcast_packet_to_list(struct bat_priv *bat_priv,
 
 	/* as we have a copy now, it is safe to decrease the TTL */
 	bcast_packet = (struct bcast_packet *)newskb->data;
-	bcast_packet->ttl--;
+	bcast_packet->header.ttl--;
 
 	skb_reset_mac_header(newskb);
 
@@ -318,7 +317,7 @@ void send_outstanding_bat_ogm_packet(struct work_struct *work)
 	if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING)
 		goto out;
 
-	bat_ogm_emit(forw_packet);
+	bat_priv->bat_algo_ops->bat_ogm_emit(forw_packet);
 
 	/**
 	 * we have to have at least one packet in the queue

net/batman-adv/soft-interface.c

@@ -457,10 +457,10 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 		batman_ogm_packet = (struct batman_ogm_packet *)
 							(skb->data + ETH_HLEN);
 
-	if (batman_ogm_packet->version != COMPAT_VERSION)
+	if (batman_ogm_packet->header.version != COMPAT_VERSION)
 		goto out;
 
-	if (batman_ogm_packet->packet_type != BAT_OGM)
+	if (batman_ogm_packet->header.packet_type != BAT_OGM)
 		goto out;
 
 	if (!(batman_ogm_packet->flags & PRIMARIES_FIRST_HOP))
@@ -632,11 +632,11 @@ static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 			goto dropped;
 
 		bcast_packet = (struct bcast_packet *)skb->data;
-		bcast_packet->version = COMPAT_VERSION;
-		bcast_packet->ttl = TTL;
+		bcast_packet->header.version = COMPAT_VERSION;
+		bcast_packet->header.ttl = TTL;
 
 		/* batman packet type: broadcast */
-		bcast_packet->packet_type = BAT_BCAST;
+		bcast_packet->header.packet_type = BAT_BCAST;
 
 		/* hw address of first interface is the orig mac because only
 		 * this mac is known throughout the mesh */
@@ -725,8 +725,8 @@ void interface_rx(struct net_device *soft_iface,
 		skb_push(skb, hdr_size);
 		unicast_packet = (struct unicast_packet *)skb->data;
 
-		if ((unicast_packet->packet_type != BAT_UNICAST) &&
-		    (unicast_packet->packet_type != BAT_UNICAST_FRAG))
+		if ((unicast_packet->header.packet_type != BAT_UNICAST) &&
+		    (unicast_packet->header.packet_type != BAT_UNICAST_FRAG))
 			goto dropped;
 
 		skb_reset_mac_header(skb);
@@ -855,6 +855,10 @@ struct net_device *softif_create(const char *name)
 	bat_priv->primary_if = NULL;
 	bat_priv->num_ifaces = 0;
 
+	ret = bat_algo_select(bat_priv, bat_routing_algo);
+	if (ret < 0)
+		goto unreg_soft_iface;
+
 	ret = sysfs_add_meshif(soft_iface);
 	if (ret < 0)
 		goto unreg_soft_iface;

net/batman-adv/translation-table.c

@@ -108,14 +108,6 @@ static struct tt_global_entry *tt_global_hash_find(struct bat_priv *bat_priv,
 
 }
 
-static bool is_out_of_time(unsigned long starting_time, unsigned long timeout)
-{
-	unsigned long deadline;
-	deadline = starting_time + msecs_to_jiffies(timeout);
-
-	return time_after(jiffies, deadline);
-}
-
 static void tt_local_entry_free_ref(struct tt_local_entry *tt_local_entry)
 {
 	if (atomic_dec_and_test(&tt_local_entry->common.refcount))
@@ -420,8 +412,8 @@ static void tt_local_purge(struct bat_priv *bat_priv)
 			if (tt_local_entry->common.flags & TT_CLIENT_PENDING)
 				continue;
 
-			if (!is_out_of_time(tt_local_entry->last_seen,
-					    TT_LOCAL_TIMEOUT * 1000))
+			if (!has_timed_out(tt_local_entry->last_seen,
+					   TT_LOCAL_TIMEOUT * 1000))
 				continue;
 
 			tt_local_set_pending(bat_priv, tt_local_entry,
@@ -733,6 +725,7 @@ void tt_global_del_orig(struct bat_priv *bat_priv,
 		spin_unlock_bh(list_lock);
 	}
 	atomic_set(&orig_node->tt_size, 0);
+	orig_node->tt_initialised = false;
 }
 
 static void tt_global_roam_purge(struct bat_priv *bat_priv)
@@ -757,8 +750,8 @@ static void tt_global_roam_purge(struct bat_priv *bat_priv)
 						       common);
 			if (!(tt_global_entry->common.flags & TT_CLIENT_ROAM))
 				continue;
-			if (!is_out_of_time(tt_global_entry->roam_at,
-					    TT_CLIENT_ROAM_TIMEOUT * 1000))
+			if (!has_timed_out(tt_global_entry->roam_at,
+					   TT_CLIENT_ROAM_TIMEOUT * 1000))
 				continue;
 
 			bat_dbg(DBG_TT, bat_priv, "Deleting global "
@@ -977,8 +970,8 @@ static void tt_req_purge(struct bat_priv *bat_priv)
 
 	spin_lock_bh(&bat_priv->tt_req_list_lock);
 	list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) {
-		if (is_out_of_time(node->issued_at,
-		    TT_REQUEST_TIMEOUT * 1000)) {
+		if (has_timed_out(node->issued_at,
+				  TT_REQUEST_TIMEOUT * 1000)) {
 			list_del(&node->list);
 			kfree(node);
 		}
@@ -996,8 +989,8 @@ static struct tt_req_node *new_tt_req_node(struct bat_priv *bat_priv,
 	spin_lock_bh(&bat_priv->tt_req_list_lock);
 	list_for_each_entry(tt_req_node_tmp, &bat_priv->tt_req_list, list) {
 		if (compare_eth(tt_req_node_tmp, orig_node) &&
-		    !is_out_of_time(tt_req_node_tmp->issued_at,
-				    TT_REQUEST_TIMEOUT * 1000))
+		    !has_timed_out(tt_req_node_tmp->issued_at,
+				   TT_REQUEST_TIMEOUT * 1000))
 			goto unlock;
 	}
 
@@ -1134,11 +1127,11 @@ static int send_tt_request(struct bat_priv *bat_priv,
 	tt_request = (struct tt_query_packet *)skb_put(skb,
 				sizeof(struct tt_query_packet));
 
-	tt_request->packet_type = BAT_TT_QUERY;
-	tt_request->version = COMPAT_VERSION;
+	tt_request->header.packet_type = BAT_TT_QUERY;
+	tt_request->header.version = COMPAT_VERSION;
 	memcpy(tt_request->src, primary_if->net_dev->dev_addr, ETH_ALEN);
 	memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN);
-	tt_request->ttl = TTL;
+	tt_request->header.ttl = TTL;
 	tt_request->ttvn = ttvn;
 	tt_request->tt_data = tt_crc;
 	tt_request->flags = TT_REQUEST;
@@ -1264,9 +1257,9 @@ static bool send_other_tt_response(struct bat_priv *bat_priv,
 		tt_response = (struct tt_query_packet *)skb->data;
 	}
 
-	tt_response->packet_type = BAT_TT_QUERY;
-	tt_response->version = COMPAT_VERSION;
-	tt_response->ttl = TTL;
+	tt_response->header.packet_type = BAT_TT_QUERY;
+	tt_response->header.version = COMPAT_VERSION;
+	tt_response->header.ttl = TTL;
 	memcpy(tt_response->src, req_dst_orig_node->orig, ETH_ALEN);
 	memcpy(tt_response->dst, tt_request->src, ETH_ALEN);
 	tt_response->flags = TT_RESPONSE;
@@ -1381,9 +1374,9 @@ static bool send_my_tt_response(struct bat_priv *bat_priv,
 		tt_response = (struct tt_query_packet *)skb->data;
 	}
 
-	tt_response->packet_type = BAT_TT_QUERY;
-	tt_response->version = COMPAT_VERSION;
-	tt_response->ttl = TTL;
+	tt_response->header.packet_type = BAT_TT_QUERY;
+	tt_response->header.version = COMPAT_VERSION;
+	tt_response->header.ttl = TTL;
 	memcpy(tt_response->src, primary_if->net_dev->dev_addr, ETH_ALEN);
 	memcpy(tt_response->dst, tt_request->src, ETH_ALEN);
 	tt_response->flags = TT_RESPONSE;
@@ -1450,6 +1443,7 @@ static void _tt_update_changes(struct bat_priv *bat_priv,
 				 */
 				return;
 	}
+	orig_node->tt_initialised = true;
 }
 
 static void tt_fill_gtable(struct bat_priv *bat_priv,
@@ -1589,8 +1583,8 @@ static void tt_roam_purge(struct bat_priv *bat_priv)
 
 	spin_lock_bh(&bat_priv->tt_roam_list_lock);
 	list_for_each_entry_safe(node, safe, &bat_priv->tt_roam_list, list) {
-		if (!is_out_of_time(node->first_time,
-				    ROAMING_MAX_TIME * 1000))
+		if (!has_timed_out(node->first_time,
+				   ROAMING_MAX_TIME * 1000))
 			continue;
 
 		list_del(&node->list);
@@ -1617,8 +1611,8 @@ static bool tt_check_roam_count(struct bat_priv *bat_priv,
 		if (!compare_eth(tt_roam_node->addr, client))
 			continue;
 
-		if (is_out_of_time(tt_roam_node->first_time,
-				   ROAMING_MAX_TIME * 1000))
+		if (has_timed_out(tt_roam_node->first_time,
+				  ROAMING_MAX_TIME * 1000))
 			continue;
 
 		if (!atomic_dec_not_zero(&tt_roam_node->counter))
@@ -1669,9 +1663,9 @@ void send_roam_adv(struct bat_priv *bat_priv, uint8_t *client,
 	roam_adv_packet = (struct roam_adv_packet *)skb_put(skb,
 					sizeof(struct roam_adv_packet));
 
-	roam_adv_packet->packet_type = BAT_ROAM_ADV;
-	roam_adv_packet->version = COMPAT_VERSION;
-	roam_adv_packet->ttl = TTL;
+	roam_adv_packet->header.packet_type = BAT_ROAM_ADV;
+	roam_adv_packet->header.version = COMPAT_VERSION;
+	roam_adv_packet->header.ttl = TTL;
 	primary_if = primary_if_get_selected(bat_priv);
 	if (!primary_if)
 		goto out;
@@ -1854,8 +1848,10 @@ void tt_update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
 	uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
 	bool full_table = true;
 
-	/* the ttvn increased by one -> we can apply the attached changes */
-	if (ttvn - orig_ttvn == 1) {
+	/* orig table not initialised AND first diff is in the OGM OR the ttvn
+	 * increased by one -> we can apply the attached changes */
+	if ((!orig_node->tt_initialised && ttvn == 1) ||
+	    ttvn - orig_ttvn == 1) {
 		/* the OGM could not contain the changes due to their size or
 		 * because they have already been sent TT_OGM_APPEND_MAX times.
 		 * In this case send a tt request */
@@ -1889,7 +1885,8 @@ void tt_update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
 	} else {
 		/* if we missed more than one change or our tables are not
 		 * in sync anymore -> request fresh tt data */
-		if (ttvn != orig_ttvn || orig_node->tt_crc != tt_crc) {
+		if (!orig_node->tt_initialised || ttvn != orig_ttvn ||
+		    orig_node->tt_crc != tt_crc) {
 request_table:
 			bat_dbg(DBG_TT, bat_priv, "TT inconsistency for %pM. "
 				"Need to retrieve the correct information "

net/batman-adv/types.h

@@ -81,6 +81,7 @@ struct orig_node {
 	int16_t tt_buff_len;
 	spinlock_t tt_buff_lock; /* protects tt_buff */
 	atomic_t tt_size;
+	bool tt_initialised;
 	/* The tt_poss_change flag is used to detect an ongoing roaming phase.
 	 * If true, then I sent a Roaming_adv to this orig_node and I have to
 	 * inspect every packet directed to it to check whether it is still
@@ -205,6 +206,7 @@ struct bat_priv {
 	atomic_t gw_reselect;
 	struct hard_iface __rcu *primary_if;  /* rcu protected pointer */
 	struct vis_info *my_vis_info;
+	struct bat_algo_ops *bat_algo_ops;
 };
 
 struct socket_client {
@@ -343,4 +345,23 @@ struct softif_neigh {
 	struct rcu_head rcu;
 };
 
+struct bat_algo_ops {
+	struct hlist_node list;
+	char *name;
+	/* init OGM when hard-interface is enabled */
+	void (*bat_ogm_init)(struct hard_iface *hard_iface);
+	/* init primary OGM when primary interface is selected */
+	void (*bat_ogm_init_primary)(struct hard_iface *hard_iface);
+	/* init mac addresses of the OGM belonging to this hard-interface */
+	void (*bat_ogm_update_mac)(struct hard_iface *hard_iface);
+	/* prepare a new outgoing OGM for the send queue */
+	void (*bat_ogm_schedule)(struct hard_iface *hard_iface,
+				 int tt_num_changes);
+	/* send scheduled OGM */
+	void (*bat_ogm_emit)(struct forw_packet *forw_packet);
+	/* receive incoming OGM */
+	void (*bat_ogm_receive)(struct hard_iface *if_incoming,
+				struct sk_buff *skb);
+};
+
 #endif /* _NET_BATMAN_ADV_TYPES_H_ */

net/batman-adv/unicast.c

@@ -67,7 +67,7 @@ static struct sk_buff *frag_merge_packet(struct list_head *head,
 
 	memmove(skb->data + uni_diff, skb->data, hdr_len);
 	unicast_packet = (struct unicast_packet *) skb_pull(skb, uni_diff);
-	unicast_packet->packet_type = BAT_UNICAST;
+	unicast_packet->header.packet_type = BAT_UNICAST;
 
 	return skb;
 
@@ -251,9 +251,9 @@ int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
 
 	memcpy(frag1, &tmp_uc, sizeof(tmp_uc));
 
-	frag1->ttl--;
-	frag1->version = COMPAT_VERSION;
-	frag1->packet_type = BAT_UNICAST_FRAG;
+	frag1->header.ttl--;
+	frag1->header.version = COMPAT_VERSION;
+	frag1->header.packet_type = BAT_UNICAST_FRAG;
 
 	memcpy(frag1->orig, primary_if->net_dev->dev_addr, ETH_ALEN);
 	memcpy(frag2, frag1, sizeof(*frag2));
@@ -320,11 +320,11 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
 
 	unicast_packet = (struct unicast_packet *)skb->data;
 
-	unicast_packet->version = COMPAT_VERSION;
+	unicast_packet->header.version = COMPAT_VERSION;
 	/* batman packet type: unicast */
-	unicast_packet->packet_type = BAT_UNICAST;
+	unicast_packet->header.packet_type = BAT_UNICAST;
 	/* set unicast ttl */
-	unicast_packet->ttl = TTL;
+	unicast_packet->header.ttl = TTL;
 	/* copy the destination for faster routing */
 	memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
 	/* set the destination tt version number */
@@ -335,7 +335,7 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
 	    data_len + sizeof(*unicast_packet) >
 				neigh_node->if_incoming->net_dev->mtu) {
 		/* send frag skb decreases ttl */
-		unicast_packet->ttl++;
+		unicast_packet->header.ttl++;
 		ret = frag_send_skb(skb, bat_priv,
 				    neigh_node->if_incoming, neigh_node->addr);
 		goto out;

net/batman-adv/vis.c

@@ -617,7 +617,7 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
 	packet->vis_type = atomic_read(&bat_priv->vis_mode);
 
 	memcpy(packet->target_orig, broadcast_addr, ETH_ALEN);
-	packet->ttl = TTL;
+	packet->header.ttl = TTL;
 	packet->seqno = htonl(ntohl(packet->seqno) + 1);
 	packet->entries = 0;
 	skb_trim(info->skb_packet, sizeof(*packet));
@@ -818,19 +818,19 @@ static void send_vis_packet(struct bat_priv *bat_priv, struct vis_info *info)
 		goto out;
 
 	packet = (struct vis_packet *)info->skb_packet->data;
-	if (packet->ttl < 2) {
+	if (packet->header.ttl < 2) {
 		pr_debug("Error - can't send vis packet: ttl exceeded\n");
 		goto out;
 	}
 
 	memcpy(packet->sender_orig, primary_if->net_dev->dev_addr, ETH_ALEN);
-	packet->ttl--;
+	packet->header.ttl--;
 
 	if (is_broadcast_ether_addr(packet->target_orig))
 		broadcast_vis_packet(bat_priv, info);
 	else
 		unicast_vis_packet(bat_priv, info);
-	packet->ttl++; /* restore TTL */
+	packet->header.ttl++; /* restore TTL */
 
 out:
 	if (primary_if)
@@ -910,9 +910,9 @@ int vis_init(struct bat_priv *bat_priv)
 	INIT_LIST_HEAD(&bat_priv->my_vis_info->send_list);
 	kref_init(&bat_priv->my_vis_info->refcount);
 	bat_priv->my_vis_info->bat_priv = bat_priv;
-	packet->version = COMPAT_VERSION;
-	packet->packet_type = BAT_VIS;
-	packet->ttl = TTL;
+	packet->header.version = COMPAT_VERSION;
+	packet->header.packet_type = BAT_VIS;
+	packet->header.ttl = TTL;
 	packet->seqno = 0;
 	packet->entries = 0;