batman-adv: remove old bridge loop avoidance code

The functionality is to be replaced by an improved implementation,
so first clean up.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>

net/batman-adv/bat_debugfs.c

@@ -238,12 +238,6 @@ static int gateways_open(struct inode *inode, struct file *file)
 	return single_open(file, gw_client_seq_print_text, net_dev);
 }
 
-static int softif_neigh_open(struct inode *inode, struct file *file)
-{
-	struct net_device *net_dev = (struct net_device *)inode->i_private;
-	return single_open(file, softif_neigh_seq_print_text, net_dev);
-}
-
 static int transtable_global_open(struct inode *inode, struct file *file)
 {
 	struct net_device *net_dev = (struct net_device *)inode->i_private;
@@ -282,7 +276,6 @@ 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);
 static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
 static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
 static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
@@ -290,7 +283,6 @@ static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
 static struct bat_debuginfo *mesh_debuginfos[] = {
 	&bat_debuginfo_originators,
 	&bat_debuginfo_gateways,
-	&bat_debuginfo_softif_neigh,
 	&bat_debuginfo_transtable_global,
 	&bat_debuginfo_transtable_local,
 	&bat_debuginfo_vis_data,

net/batman-adv/main.c

@@ -96,13 +96,10 @@ int mesh_init(struct net_device *soft_iface)
 	spin_lock_init(&bat_priv->gw_list_lock);
 	spin_lock_init(&bat_priv->vis_hash_lock);
 	spin_lock_init(&bat_priv->vis_list_lock);
-	spin_lock_init(&bat_priv->softif_neigh_lock);
-	spin_lock_init(&bat_priv->softif_neigh_vid_lock);
 
 	INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
 	INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
 	INIT_HLIST_HEAD(&bat_priv->gw_list);
-	INIT_HLIST_HEAD(&bat_priv->softif_neigh_vids);
 	INIT_LIST_HEAD(&bat_priv->tt_changes_list);
 	INIT_LIST_HEAD(&bat_priv->tt_req_list);
 	INIT_LIST_HEAD(&bat_priv->tt_roam_list);
@@ -145,8 +142,6 @@ void mesh_free(struct net_device *soft_iface)
 
 	tt_free(bat_priv);
 
-	softif_neigh_purge(bat_priv);
-
 	atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
 }
 

net/batman-adv/main.h

@@ -80,8 +80,6 @@
 #define MAX_AGGREGATION_BYTES 512
 #define MAX_AGGREGATION_MS 100
 
-#define SOFTIF_NEIGH_TIMEOUT 180000 /* 3 minutes */
-
 /* don't reset again within 30 seconds */
 #define RESET_PROTECTION_MS 30000
 #define EXPECTED_SEQNO_RANGE	65536

net/batman-adv/originator.c

@@ -375,8 +375,6 @@ static void _purge_orig(struct bat_priv *bat_priv)
 
 	gw_node_purge(bat_priv);
 	gw_election(bat_priv);
-
-	softif_neigh_purge(bat_priv);
 }
 
 static void purge_orig(struct work_struct *work)

net/batman-adv/routing.c

@@ -30,6 +30,9 @@
 #include "vis.h"
 #include "unicast.h"
 
+static int route_unicast_packet(struct sk_buff *skb,
+				struct hard_iface *recv_if);
+
 void slide_own_bcast_window(struct hard_iface *hard_iface)
 {
 	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
@@ -798,7 +801,7 @@ static int check_unicast_packet(struct sk_buff *skb, int hdr_size)
 	return 0;
 }
 
-int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
+static int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
 	struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
 	struct orig_node *orig_node = NULL;

net/batman-adv/routing.h

@@ -25,7 +25,6 @@
 void slide_own_bcast_window(struct hard_iface *hard_iface);
 void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
 		  struct neigh_node *neigh_node);
-int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if);

net/batman-adv/soft-interface.h

@@ -23,8 +23,6 @@
 #define _NET_BATMAN_ADV_SOFT_INTERFACE_H_
 
 int my_skb_head_push(struct sk_buff *skb, unsigned int len);
-int softif_neigh_seq_print_text(struct seq_file *seq, void *offset);
-void softif_neigh_purge(struct bat_priv *bat_priv);
 void interface_rx(struct net_device *soft_iface,
 		  struct sk_buff *skb, struct hard_iface *recv_if,
 		  int hdr_size);

net/batman-adv/types.h

@@ -174,7 +174,6 @@ struct bat_priv {
 	struct hlist_head forw_bat_list;
 	struct hlist_head forw_bcast_list;
 	struct hlist_head gw_list;
-	struct hlist_head softif_neigh_vids;
 	struct list_head tt_changes_list; /* tracks changes in a OGM int */
 	struct list_head vis_send_list;
 	struct hashtable_t *orig_hash;
@@ -191,8 +190,6 @@ struct bat_priv {
 	spinlock_t gw_list_lock; /* protects gw_list and curr_gw */
 	spinlock_t vis_hash_lock; /* protects vis_hash */
 	spinlock_t vis_list_lock; /* protects vis_info::recv_list */
-	spinlock_t softif_neigh_lock; /* protects soft-interface neigh list */
-	spinlock_t softif_neigh_vid_lock; /* protects soft-interface vid list */
 	atomic_t num_local_tt;
 	/* Checksum of the local table, recomputed before sending a new OGM */
 	atomic_t tt_crc;
@@ -327,24 +324,6 @@ struct recvlist_node {
 	uint8_t mac[ETH_ALEN];
 };
 
-struct softif_neigh_vid {
-	struct hlist_node list;
-	struct bat_priv *bat_priv;
-	short vid;
-	atomic_t refcount;
-	struct softif_neigh __rcu *softif_neigh;
-	struct rcu_head rcu;
-	struct hlist_head softif_neigh_list;
-};
-
-struct softif_neigh {
-	struct hlist_node list;
-	uint8_t addr[ETH_ALEN];
-	unsigned long last_seen;
-	atomic_t refcount;
-	struct rcu_head rcu;
-};
-
 struct bat_algo_ops {
 	struct hlist_node list;
 	char *name;