batman-adv: remove vis functionality

This is replaced by a userspace program, we don't need this
functionality to bloat the kernel.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>

1 files changed, 0 insertions, 938 deletions

diff --git a/net/batman-adv/vis.c b/net/batman-adv/vis.c
deleted file mode 100644
index d8ea31a58457..000000000000
--- a/net/batman-adv/vis.c
+++ /dev/null
@@ -1,938 +0,0 @@
-/* Copyright (C) 2008-2013 B.A.T.M.A.N. contributors:
- *
- * Simon Wunderlich
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA
- */
-
-#include "main.h"
-#include "send.h"
-#include "translation-table.h"
-#include "vis.h"
-#include "soft-interface.h"
-#include "hard-interface.h"
-#include "hash.h"
-#include "originator.h"
-
-#define BATADV_MAX_VIS_PACKET_SIZE 1000
-
-/* hash class keys */
-static struct lock_class_key batadv_vis_hash_lock_class_key;
-
-/* free the info */
-static void batadv_free_info(struct kref *ref)
-{
-	struct batadv_vis_info *info;
-	struct batadv_priv *bat_priv;
-	struct batadv_vis_recvlist_node *entry, *tmp;
-
-	info = container_of(ref, struct batadv_vis_info, refcount);
-	bat_priv = info->bat_priv;
-
-	list_del_init(&info->send_list);
-	spin_lock_bh(&bat_priv->vis.list_lock);
-	list_for_each_entry_safe(entry, tmp, &info->recv_list, list) {
-		list_del(&entry->list);
-		kfree(entry);
-	}
-
-	spin_unlock_bh(&bat_priv->vis.list_lock);
-	kfree_skb(info->skb_packet);
-	kfree(info);
-}
-
-/* Compare two vis packets, used by the hashing algorithm */
-static int batadv_vis_info_cmp(const struct hlist_node *node, const void *data2)
-{
-	const struct batadv_vis_info *d1, *d2;
-	const struct batadv_vis_packet *p1, *p2;
-
-	d1 = container_of(node, struct batadv_vis_info, hash_entry);
-	d2 = data2;
-	p1 = (struct batadv_vis_packet *)d1->skb_packet->data;
-	p2 = (struct batadv_vis_packet *)d2->skb_packet->data;
-	return batadv_compare_eth(p1->vis_orig, p2->vis_orig);
-}
-
-/* hash function to choose an entry in a hash table of given size
- * hash algorithm from http://en.wikipedia.org/wiki/Hash_table
- */
-static uint32_t batadv_vis_info_choose(const void *data, uint32_t size)
-{
-	const struct batadv_vis_info *vis_info = data;
-	const struct batadv_vis_packet *packet;
-	const unsigned char *key;
-	uint32_t hash = 0;
-	size_t i;
-
-	packet = (struct batadv_vis_packet *)vis_info->skb_packet->data;
-	key = packet->vis_orig;
-	for (i = 0; i < ETH_ALEN; i++) {
-		hash += key[i];
-		hash += (hash << 10);
-		hash ^= (hash >> 6);
-	}
-
-	hash += (hash << 3);
-	hash ^= (hash >> 11);
-	hash += (hash << 15);
-
-	return hash % size;
-}
-
-static struct batadv_vis_info *
-batadv_vis_hash_find(struct batadv_priv *bat_priv, const void *data)
-{
-	struct batadv_hashtable *hash = bat_priv->vis.hash;
-	struct hlist_head *head;
-	struct batadv_vis_info *vis_info, *vis_info_tmp = NULL;
-	uint32_t index;
-
-	if (!hash)
-		return NULL;
-
-	index = batadv_vis_info_choose(data, hash->size);
-	head = &hash->table[index];
-
-	rcu_read_lock();
-	hlist_for_each_entry_rcu(vis_info, head, hash_entry) {
-		if (!batadv_vis_info_cmp(&vis_info->hash_entry, data))
-			continue;
-
-		vis_info_tmp = vis_info;
-		break;
-	}
-	rcu_read_unlock();
-
-	return vis_info_tmp;
-}
-
-/* insert interface to the list of interfaces of one originator, if it
- * does not already exist in the list
- */
-static void batadv_vis_data_insert_interface(const uint8_t *interface,
-					     struct hlist_head *if_list,
-					     bool primary)
-{
-	struct batadv_vis_if_list_entry *entry;
-
-	hlist_for_each_entry(entry, if_list, list) {
-		if (batadv_compare_eth(entry->addr, interface))
-			return;
-	}
-
-	/* it's a new address, add it to the list */
-	entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
-	if (!entry)
-		return;
-	memcpy(entry->addr, interface, ETH_ALEN);
-	entry->primary = primary;
-	hlist_add_head(&entry->list, if_list);
-}
-
-static void batadv_vis_data_read_prim_sec(struct seq_file *seq,
-					  const struct hlist_head *if_list)
-{
-	struct batadv_vis_if_list_entry *entry;
-
-	hlist_for_each_entry(entry, if_list, list) {
-		if (entry->primary)
-			seq_puts(seq, "PRIMARY, ");
-		else
-			seq_printf(seq,  "SEC %pM, ", entry->addr);
-	}
-}
-
-/* read an entry  */
-static ssize_t
-batadv_vis_data_read_entry(struct seq_file *seq,
-			   const struct batadv_vis_info_entry *entry,
-			   const uint8_t *src, bool primary)
-{
-	if (primary && entry->quality == 0)
-		return seq_printf(seq, "TT %pM, ", entry->dest);
-	else if (batadv_compare_eth(entry->src, src))
-		return seq_printf(seq, "TQ %pM %d, ", entry->dest,
-				  entry->quality);
-
-	return 0;
-}
-
-static void
-batadv_vis_data_insert_interfaces(struct hlist_head *list,
-				  struct batadv_vis_packet *packet,
-				  struct batadv_vis_info_entry *entries)
-{
-	int i;
-
-	for (i = 0; i < packet->entries; i++) {
-		if (entries[i].quality == 0)
-			continue;
-
-		if (batadv_compare_eth(entries[i].src, packet->vis_orig))
-			continue;
-
-		batadv_vis_data_insert_interface(entries[i].src, list, false);
-	}
-}
-
-static void batadv_vis_data_read_entries(struct seq_file *seq,
-					 struct hlist_head *list,
-					 struct batadv_vis_packet *packet,
-					 struct batadv_vis_info_entry *entries)
-{
-	int i;
-	struct batadv_vis_if_list_entry *entry;
-
-	hlist_for_each_entry(entry, list, list) {
-		seq_printf(seq, "%pM,", entry->addr);
-
-		for (i = 0; i < packet->entries; i++)
-			batadv_vis_data_read_entry(seq, &entries[i],
-						   entry->addr, entry->primary);
-
-		/* add primary/secondary records */
-		if (batadv_compare_eth(entry->addr, packet->vis_orig))
-			batadv_vis_data_read_prim_sec(seq, list);
-
-		seq_puts(seq, "\n");
-	}
-}
-
-static void batadv_vis_seq_print_text_bucket(struct seq_file *seq,
-					     const struct hlist_head *head)
-{
-	struct batadv_vis_info *info;
-	struct batadv_vis_packet *packet;
-	uint8_t *entries_pos;
-	struct batadv_vis_info_entry *entries;
-	struct batadv_vis_if_list_entry *entry;
-	struct hlist_node *n;
-
-	HLIST_HEAD(vis_if_list);
-
-	hlist_for_each_entry_rcu(info, head, hash_entry) {
-		packet = (struct batadv_vis_packet *)info->skb_packet->data;
-		entries_pos = (uint8_t *)packet + sizeof(*packet);
-		entries = (struct batadv_vis_info_entry *)entries_pos;
-
-		batadv_vis_data_insert_interface(packet->vis_orig, &vis_if_list,
-						 true);
-		batadv_vis_data_insert_interfaces(&vis_if_list, packet,
-						  entries);
-		batadv_vis_data_read_entries(seq, &vis_if_list, packet,
-					     entries);
-
-		hlist_for_each_entry_safe(entry, n, &vis_if_list, list) {
-			hlist_del(&entry->list);
-			kfree(entry);
-		}
-	}
-}
-
-int batadv_vis_seq_print_text(struct seq_file *seq, void *offset)
-{
-	struct batadv_hard_iface *primary_if;
-	struct hlist_head *head;
-	struct net_device *net_dev = (struct net_device *)seq->private;
-	struct batadv_priv *bat_priv = netdev_priv(net_dev);
-	struct batadv_hashtable *hash = bat_priv->vis.hash;
-	uint32_t i;
-	int ret = 0;
-	int vis_server = atomic_read(&bat_priv->vis_mode);
-
-	primary_if = batadv_primary_if_get_selected(bat_priv);
-	if (!primary_if)
-		goto out;
-
-	if (vis_server == BATADV_VIS_TYPE_CLIENT_UPDATE)
-		goto out;
-
-	spin_lock_bh(&bat_priv->vis.hash_lock);
-	for (i = 0; i < hash->size; i++) {
-		head = &hash->table[i];
-		batadv_vis_seq_print_text_bucket(seq, head);
-	}
-	spin_unlock_bh(&bat_priv->vis.hash_lock);
-
-out:
-	if (primary_if)
-		batadv_hardif_free_ref(primary_if);
-	return ret;
-}
-
-/* add the info packet to the send list, if it was not
- * already linked in.
- */
-static void batadv_send_list_add(struct batadv_priv *bat_priv,
-				 struct batadv_vis_info *info)
-{
-	if (list_empty(&info->send_list)) {
-		kref_get(&info->refcount);
-		list_add_tail(&info->send_list, &bat_priv->vis.send_list);
-	}
-}
-
-/* delete the info packet from the send list, if it was
- * linked in.
- */
-static void batadv_send_list_del(struct batadv_vis_info *info)
-{
-	if (!list_empty(&info->send_list)) {
-		list_del_init(&info->send_list);
-		kref_put(&info->refcount, batadv_free_info);
-	}
-}
-
-/* tries to add one entry to the receive list. */
-static void batadv_recv_list_add(struct batadv_priv *bat_priv,
-				 struct list_head *recv_list, const char *mac)
-{
-	struct batadv_vis_recvlist_node *entry;
-
-	entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
-	if (!entry)
-		return;
-
-	memcpy(entry->mac, mac, ETH_ALEN);
-	spin_lock_bh(&bat_priv->vis.list_lock);
-	list_add_tail(&entry->list, recv_list);
-	spin_unlock_bh(&bat_priv->vis.list_lock);
-}
-
-/* returns 1 if this mac is in the recv_list */
-static int batadv_recv_list_is_in(struct batadv_priv *bat_priv,
-				  const struct list_head *recv_list,
-				  const char *mac)
-{
-	const struct batadv_vis_recvlist_node *entry;
-
-	spin_lock_bh(&bat_priv->vis.list_lock);
-	list_for_each_entry(entry, recv_list, list) {
-		if (batadv_compare_eth(entry->mac, mac)) {
-			spin_unlock_bh(&bat_priv->vis.list_lock);
-			return 1;
-		}
-	}
-	spin_unlock_bh(&bat_priv->vis.list_lock);
-	return 0;
-}
-
-/* try to add the packet to the vis_hash. return NULL if invalid (e.g. too old,
- * broken.. ).	vis hash must be locked outside.  is_new is set when the packet
- * is newer than old entries in the hash.
- */
-static struct batadv_vis_info *
-batadv_add_packet(struct batadv_priv *bat_priv,
-		  struct batadv_vis_packet *vis_packet, int vis_info_len,
-		  int *is_new, int make_broadcast)
-{
-	struct batadv_vis_info *info, *old_info;
-	struct batadv_vis_packet *search_packet, *old_packet;
-	struct batadv_vis_info search_elem;
-	struct batadv_vis_packet *packet;
-	struct sk_buff *tmp_skb;
-	int hash_added;
-	size_t len;
-	size_t max_entries;
-
-	*is_new = 0;
-	/* sanity check */
-	if (!bat_priv->vis.hash)
-		return NULL;
-
-	/* see if the packet is already in vis_hash */
-	search_elem.skb_packet = dev_alloc_skb(sizeof(*search_packet));
-	if (!search_elem.skb_packet)
-		return NULL;
-	len = sizeof(*search_packet);
-	tmp_skb = search_elem.skb_packet;
-	search_packet = (struct batadv_vis_packet *)skb_put(tmp_skb, len);
-
-	memcpy(search_packet->vis_orig, vis_packet->vis_orig, ETH_ALEN);
-	old_info = batadv_vis_hash_find(bat_priv, &search_elem);
-	kfree_skb(search_elem.skb_packet);
-
-	if (old_info) {
-		tmp_skb = old_info->skb_packet;
-		old_packet = (struct batadv_vis_packet *)tmp_skb->data;
-		if (!batadv_seq_after(ntohl(vis_packet->seqno),
-				      ntohl(old_packet->seqno))) {
-			if (old_packet->seqno == vis_packet->seqno) {
-				batadv_recv_list_add(bat_priv,
-						     &old_info->recv_list,
-						     vis_packet->sender_orig);
-				return old_info;
-			} else {
-				/* newer packet is already in hash. */
-				return NULL;
-			}
-		}
-		/* remove old entry */
-		batadv_hash_remove(bat_priv->vis.hash, batadv_vis_info_cmp,
-				   batadv_vis_info_choose, old_info);
-		batadv_send_list_del(old_info);
-		kref_put(&old_info->refcount, batadv_free_info);
-	}
-
-	info = kmalloc(sizeof(*info), GFP_ATOMIC);
-	if (!info)
-		return NULL;
-
-	len = sizeof(*packet) + vis_info_len;
-	info->skb_packet = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN);
-	if (!info->skb_packet) {
-		kfree(info);
-		return NULL;
-	}
-	info->skb_packet->priority = TC_PRIO_CONTROL;
-	skb_reserve(info->skb_packet, ETH_HLEN);
-	packet = (struct batadv_vis_packet *)skb_put(info->skb_packet, len);
-
-	kref_init(&info->refcount);
-	INIT_LIST_HEAD(&info->send_list);
-	INIT_LIST_HEAD(&info->recv_list);
-	info->first_seen = jiffies;
-	info->bat_priv = bat_priv;
-	memcpy(packet, vis_packet, len);
-
-	/* initialize and add new packet. */
-	*is_new = 1;
-
-	/* Make it a broadcast packet, if required */
-	if (make_broadcast)
-		memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN);
-
-	/* repair if entries is longer than packet. */
-	max_entries = vis_info_len / sizeof(struct batadv_vis_info_entry);
-	if (packet->entries > max_entries)
-		packet->entries = max_entries;
-
-	batadv_recv_list_add(bat_priv, &info->recv_list, packet->sender_orig);
-
-	/* try to add it */
-	hash_added = batadv_hash_add(bat_priv->vis.hash, batadv_vis_info_cmp,
-				     batadv_vis_info_choose, info,
-				     &info->hash_entry);
-	if (hash_added != 0) {
-		/* did not work (for some reason) */
-		kref_put(&info->refcount, batadv_free_info);
-		info = NULL;
-	}
-
-	return info;
-}
-
-/* handle the server sync packet, forward if needed. */
-void batadv_receive_server_sync_packet(struct batadv_priv *bat_priv,
-				       struct batadv_vis_packet *vis_packet,
-				       int vis_info_len)
-{
-	struct batadv_vis_info *info;
-	int is_new, make_broadcast;
-	int vis_server = atomic_read(&bat_priv->vis_mode);
-
-	make_broadcast = (vis_server == BATADV_VIS_TYPE_SERVER_SYNC);
-
-	spin_lock_bh(&bat_priv->vis.hash_lock);
-	info = batadv_add_packet(bat_priv, vis_packet, vis_info_len,
-				 &is_new, make_broadcast);
-	if (!info)
-		goto end;
-
-	/* only if we are server ourselves and packet is newer than the one in
-	 * hash.
-	 */
-	if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC && is_new)
-		batadv_send_list_add(bat_priv, info);
-end:
-	spin_unlock_bh(&bat_priv->vis.hash_lock);
-}
-
-/* handle an incoming client update packet and schedule forward if needed. */
-void batadv_receive_client_update_packet(struct batadv_priv *bat_priv,
-					 struct batadv_vis_packet *vis_packet,
-					 int vis_info_len)
-{
-	struct batadv_vis_info *info;
-	struct batadv_vis_packet *packet;
-	int is_new;
-	int vis_server = atomic_read(&bat_priv->vis_mode);
-	int are_target = 0;
-
-	/* clients shall not broadcast. */
-	if (is_broadcast_ether_addr(vis_packet->target_orig))
-		return;
-
-	/* Are we the target for this VIS packet? */
-	if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC	&&
-	    batadv_is_my_mac(bat_priv, vis_packet->target_orig))
-		are_target = 1;
-
-	spin_lock_bh(&bat_priv->vis.hash_lock);
-	info = batadv_add_packet(bat_priv, vis_packet, vis_info_len,
-				 &is_new, are_target);
-
-	if (!info)
-		goto end;
-	/* note that outdated packets will be dropped at this point. */
-
-	packet = (struct batadv_vis_packet *)info->skb_packet->data;
-
-	/* send only if we're the target server or ... */
-	if (are_target && is_new) {
-		packet->vis_type = BATADV_VIS_TYPE_SERVER_SYNC;	/* upgrade! */
-		batadv_send_list_add(bat_priv, info);
-
-		/* ... we're not the recipient (and thus need to forward). */
-	} else if (!batadv_is_my_mac(bat_priv, packet->target_orig)) {
-		batadv_send_list_add(bat_priv, info);
-	}
-
-end:
-	spin_unlock_bh(&bat_priv->vis.hash_lock);
-}
-
-/* Walk the originators and find the VIS server with the best tq. Set the packet
- * address to its address and return the best_tq.
- *
- * Must be called with the originator hash locked
- */
-static int batadv_find_best_vis_server(struct batadv_priv *bat_priv,
-				       struct batadv_vis_info *info)
-{
-	struct batadv_hashtable *hash = bat_priv->orig_hash;
-	struct batadv_neigh_node *router;
-	struct hlist_head *head;
-	struct batadv_orig_node *orig_node;
-	struct batadv_vis_packet *packet;
-	int best_tq = -1;
-	uint32_t i;
-
-	packet = (struct batadv_vis_packet *)info->skb_packet->data;
-
-	for (i = 0; i < hash->size; i++) {
-		head = &hash->table[i];
-
-		rcu_read_lock();
-		hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
-			router = batadv_orig_node_get_router(orig_node);
-			if (!router)
-				continue;
-
-			if ((orig_node->flags & BATADV_VIS_SERVER) &&
-			    (router->tq_avg > best_tq)) {
-				best_tq = router->tq_avg;
-				memcpy(packet->target_orig, orig_node->orig,
-				       ETH_ALEN);
-			}
-			batadv_neigh_node_free_ref(router);
-		}
-		rcu_read_unlock();
-	}
-
-	return best_tq;
-}
-
-/* Return true if the vis packet is full. */
-static bool batadv_vis_packet_full(const struct batadv_vis_info *info)
-{
-	const struct batadv_vis_packet *packet;
-	size_t num;
-
-	packet = (struct batadv_vis_packet *)info->skb_packet->data;
-	num = BATADV_MAX_VIS_PACKET_SIZE / sizeof(struct batadv_vis_info_entry);
-
-	if (num < packet->entries + 1)
-		return true;
-	return false;
-}
-
-/* generates a packet of own vis data,
- * returns 0 on success, -1 if no packet could be generated
- */
-static int batadv_generate_vis_packet(struct batadv_priv *bat_priv)
-{
-	struct batadv_hashtable *hash = bat_priv->orig_hash;
-	struct hlist_head *head;
-	struct batadv_orig_node *orig_node;
-	struct batadv_neigh_node *router;
-	struct batadv_vis_info *info = bat_priv->vis.my_info;
-	struct batadv_vis_packet *packet;
-	struct batadv_vis_info_entry *entry;
-	struct batadv_tt_common_entry *tt_common_entry;
-	uint8_t *packet_pos;
-	int best_tq = -1;
-	uint32_t i;
-
-	info->first_seen = jiffies;
-	packet = (struct batadv_vis_packet *)info->skb_packet->data;
-	packet->vis_type = atomic_read(&bat_priv->vis_mode);
-
-	memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN);
-	packet->header.ttl = BATADV_TTL;
-	packet->seqno = htonl(ntohl(packet->seqno) + 1);
-	packet->entries = 0;
-	packet->reserved = 0;
-	skb_trim(info->skb_packet, sizeof(*packet));
-
-	if (packet->vis_type == BATADV_VIS_TYPE_CLIENT_UPDATE) {
-		best_tq = batadv_find_best_vis_server(bat_priv, info);
-
-		if (best_tq < 0)
-			return best_tq;
-	}
-
-	for (i = 0; i < hash->size; i++) {
-		head = &hash->table[i];
-
-		rcu_read_lock();
-		hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
-			router = batadv_orig_node_get_router(orig_node);
-			if (!router)
-				continue;
-
-			if (!batadv_compare_eth(router->addr, orig_node->orig))
-				goto next;
-
-			if (router->if_incoming->if_status != BATADV_IF_ACTIVE)
-				goto next;
-
-			if (router->tq_avg < 1)
-				goto next;
-
-			/* fill one entry into buffer. */
-			packet_pos = skb_put(info->skb_packet, sizeof(*entry));
-			entry = (struct batadv_vis_info_entry *)packet_pos;
-			memcpy(entry->src,
-			       router->if_incoming->net_dev->dev_addr,
-			       ETH_ALEN);
-			memcpy(entry->dest, orig_node->orig, ETH_ALEN);
-			entry->quality = router->tq_avg;
-			packet->entries++;
-
-next:
-			batadv_neigh_node_free_ref(router);
-
-			if (batadv_vis_packet_full(info))
-				goto unlock;
-		}
-		rcu_read_unlock();
-	}
-
-	hash = bat_priv->tt.local_hash;
-
-	for (i = 0; i < hash->size; i++) {
-		head = &hash->table[i];
-
-		rcu_read_lock();
-		hlist_for_each_entry_rcu(tt_common_entry, head,
-					 hash_entry) {
-			packet_pos = skb_put(info->skb_packet, sizeof(*entry));
-			entry = (struct batadv_vis_info_entry *)packet_pos;
-			memset(entry->src, 0, ETH_ALEN);
-			memcpy(entry->dest, tt_common_entry->addr, ETH_ALEN);
-			entry->quality = 0; /* 0 means TT */
-			packet->entries++;
-
-			if (batadv_vis_packet_full(info))
-				goto unlock;
-		}
-		rcu_read_unlock();
-	}
-
-	return 0;
-
-unlock:
-	rcu_read_unlock();
-	return 0;
-}
-
-/* free old vis packets. Must be called with this vis_hash_lock
- * held
- */
-static void batadv_purge_vis_packets(struct batadv_priv *bat_priv)
-{
-	uint32_t i;
-	struct batadv_hashtable *hash = bat_priv->vis.hash;
-	struct hlist_node *node_tmp;
-	struct hlist_head *head;
-	struct batadv_vis_info *info;
-
-	for (i = 0; i < hash->size; i++) {
-		head = &hash->table[i];
-
-		hlist_for_each_entry_safe(info, node_tmp,
-					  head, hash_entry) {
-			/* never purge own data. */
-			if (info == bat_priv->vis.my_info)
-				continue;
-
-			if (batadv_has_timed_out(info->first_seen,
-						 BATADV_VIS_TIMEOUT)) {
-				hlist_del(&info->hash_entry);
-				batadv_send_list_del(info);
-				kref_put(&info->refcount, batadv_free_info);
-			}
-		}
-	}
-}
-
-static void batadv_broadcast_vis_packet(struct batadv_priv *bat_priv,
-					struct batadv_vis_info *info)
-{
-	struct batadv_hashtable *hash = bat_priv->orig_hash;
-	struct hlist_head *head;
-	struct batadv_orig_node *orig_node;
-	struct batadv_vis_packet *packet;
-	struct sk_buff *skb;
-	uint32_t i, res;
-
-
-	packet = (struct batadv_vis_packet *)info->skb_packet->data;
-
-	/* send to all routers in range. */
-	for (i = 0; i < hash->size; i++) {
-		head = &hash->table[i];
-
-		rcu_read_lock();
-		hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
-			/* if it's a vis server and reachable, send it. */
-			if (!(orig_node->flags & BATADV_VIS_SERVER))
-				continue;
-
-			/* don't send it if we already received the packet from
-			 * this node.
-			 */
-			if (batadv_recv_list_is_in(bat_priv, &info->recv_list,
-						   orig_node->orig))
-				continue;
-
-			memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
-			skb = skb_clone(info->skb_packet, GFP_ATOMIC);
-			if (!skb)
-				continue;
-
-			res = batadv_send_skb_to_orig(skb, orig_node, NULL);
-			if (res == NET_XMIT_DROP)
-				kfree_skb(skb);
-		}
-		rcu_read_unlock();
-	}
-}
-
-static void batadv_unicast_vis_packet(struct batadv_priv *bat_priv,
-				      struct batadv_vis_info *info)
-{
-	struct batadv_orig_node *orig_node;
-	struct sk_buff *skb;
-	struct batadv_vis_packet *packet;
-
-	packet = (struct batadv_vis_packet *)info->skb_packet->data;
-
-	orig_node = batadv_orig_hash_find(bat_priv, packet->target_orig);
-	if (!orig_node)
-		goto out;
-
-	skb = skb_clone(info->skb_packet, GFP_ATOMIC);
-	if (!skb)
-		goto out;
-
-	if (batadv_send_skb_to_orig(skb, orig_node, NULL) == NET_XMIT_DROP)
-		kfree_skb(skb);
-
-out:
-	if (orig_node)
-		batadv_orig_node_free_ref(orig_node);
-}
-
-/* only send one vis packet. called from batadv_send_vis_packets() */
-static void batadv_send_vis_packet(struct batadv_priv *bat_priv,
-				   struct batadv_vis_info *info)
-{
-	struct batadv_hard_iface *primary_if;
-	struct batadv_vis_packet *packet;
-
-	primary_if = batadv_primary_if_get_selected(bat_priv);
-	if (!primary_if)
-		goto out;
-
-	packet = (struct batadv_vis_packet *)info->skb_packet->data;
-	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->header.ttl--;
-
-	if (is_broadcast_ether_addr(packet->target_orig))
-		batadv_broadcast_vis_packet(bat_priv, info);
-	else
-		batadv_unicast_vis_packet(bat_priv, info);
-	packet->header.ttl++; /* restore TTL */
-
-out:
-	if (primary_if)
-		batadv_hardif_free_ref(primary_if);
-}
-
-/* called from timer; send (and maybe generate) vis packet. */
-static void batadv_send_vis_packets(struct work_struct *work)
-{
-	struct delayed_work *delayed_work;
-	struct batadv_priv *bat_priv;
-	struct batadv_priv_vis *priv_vis;
-	struct batadv_vis_info *info;
-
-	delayed_work = container_of(work, struct delayed_work, work);
-	priv_vis = container_of(delayed_work, struct batadv_priv_vis, work);
-	bat_priv = container_of(priv_vis, struct batadv_priv, vis);
-	spin_lock_bh(&bat_priv->vis.hash_lock);
-	batadv_purge_vis_packets(bat_priv);
-
-	if (batadv_generate_vis_packet(bat_priv) == 0) {
-		/* schedule if generation was successful */
-		batadv_send_list_add(bat_priv, bat_priv->vis.my_info);
-	}
-
-	while (!list_empty(&bat_priv->vis.send_list)) {
-		info = list_first_entry(&bat_priv->vis.send_list,
-					typeof(*info), send_list);
-
-		kref_get(&info->refcount);
-		spin_unlock_bh(&bat_priv->vis.hash_lock);
-
-		batadv_send_vis_packet(bat_priv, info);
-
-		spin_lock_bh(&bat_priv->vis.hash_lock);
-		batadv_send_list_del(info);
-		kref_put(&info->refcount, batadv_free_info);
-	}
-	spin_unlock_bh(&bat_priv->vis.hash_lock);
-
-	queue_delayed_work(batadv_event_workqueue, &bat_priv->vis.work,
-			   msecs_to_jiffies(BATADV_VIS_INTERVAL));
-}
-
-/* init the vis server. this may only be called when if_list is already
- * initialized (e.g. bat0 is initialized, interfaces have been added)
- */
-int batadv_vis_init(struct batadv_priv *bat_priv)
-{
-	struct batadv_vis_packet *packet;
-	int hash_added;
-	unsigned int len;
-	unsigned long first_seen;
-	struct sk_buff *tmp_skb;
-
-	if (bat_priv->vis.hash)
-		return 0;
-
-	spin_lock_bh(&bat_priv->vis.hash_lock);
-
-	bat_priv->vis.hash = batadv_hash_new(256);
-	if (!bat_priv->vis.hash) {
-		pr_err("Can't initialize vis_hash\n");
-		goto err;
-	}
-
-	batadv_hash_set_lock_class(bat_priv->vis.hash,
-				   &batadv_vis_hash_lock_class_key);
-
-	bat_priv->vis.my_info = kmalloc(BATADV_MAX_VIS_PACKET_SIZE, GFP_ATOMIC);
-	if (!bat_priv->vis.my_info)
-		goto err;
-
-	len = sizeof(*packet) + BATADV_MAX_VIS_PACKET_SIZE + ETH_HLEN;
-	bat_priv->vis.my_info->skb_packet = netdev_alloc_skb_ip_align(NULL,
-								      len);
-	if (!bat_priv->vis.my_info->skb_packet)
-		goto free_info;
-
-	bat_priv->vis.my_info->skb_packet->priority = TC_PRIO_CONTROL;
-	skb_reserve(bat_priv->vis.my_info->skb_packet, ETH_HLEN);
-	tmp_skb = bat_priv->vis.my_info->skb_packet;
-	packet = (struct batadv_vis_packet *)skb_put(tmp_skb, sizeof(*packet));
-
-	/* prefill the vis info */
-	first_seen = jiffies - msecs_to_jiffies(BATADV_VIS_INTERVAL);
-	bat_priv->vis.my_info->first_seen = first_seen;
-	INIT_LIST_HEAD(&bat_priv->vis.my_info->recv_list);
-	INIT_LIST_HEAD(&bat_priv->vis.my_info->send_list);
-	kref_init(&bat_priv->vis.my_info->refcount);
-	bat_priv->vis.my_info->bat_priv = bat_priv;
-	packet->header.version = BATADV_COMPAT_VERSION;
-	packet->header.packet_type = BATADV_VIS;
-	packet->header.ttl = BATADV_TTL;
-	packet->seqno = 0;
-	packet->reserved = 0;
-	packet->entries = 0;
-
-	INIT_LIST_HEAD(&bat_priv->vis.send_list);
-
-	hash_added = batadv_hash_add(bat_priv->vis.hash, batadv_vis_info_cmp,
-				     batadv_vis_info_choose,
-				     bat_priv->vis.my_info,
-				     &bat_priv->vis.my_info->hash_entry);
-	if (hash_added != 0) {
-		pr_err("Can't add own vis packet into hash\n");
-		/* not in hash, need to remove it manually. */
-		kref_put(&bat_priv->vis.my_info->refcount, batadv_free_info);
-		goto err;
-	}
-
-	spin_unlock_bh(&bat_priv->vis.hash_lock);
-
-	INIT_DELAYED_WORK(&bat_priv->vis.work, batadv_send_vis_packets);
-	queue_delayed_work(batadv_event_workqueue, &bat_priv->vis.work,
-			   msecs_to_jiffies(BATADV_VIS_INTERVAL));
-
-	return 0;
-
-free_info:
-	kfree(bat_priv->vis.my_info);
-	bat_priv->vis.my_info = NULL;
-err:
-	spin_unlock_bh(&bat_priv->vis.hash_lock);
-	batadv_vis_quit(bat_priv);
-	return -ENOMEM;
-}
-
-/* Decrease the reference count on a hash item info */
-static void batadv_free_info_ref(struct hlist_node *node, void *arg)
-{
-	struct batadv_vis_info *info;
-
-	info = container_of(node, struct batadv_vis_info, hash_entry);
-	batadv_send_list_del(info);
-	kref_put(&info->refcount, batadv_free_info);
-}
-
-/* shutdown vis-server */
-void batadv_vis_quit(struct batadv_priv *bat_priv)
-{
-	if (!bat_priv->vis.hash)
-		return;
-
-	cancel_delayed_work_sync(&bat_priv->vis.work);
-
-	spin_lock_bh(&bat_priv->vis.hash_lock);
-	/* properly remove, kill timers ... */
-	batadv_hash_delete(bat_priv->vis.hash, batadv_free_info_ref, NULL);
-	bat_priv->vis.hash = NULL;
-	bat_priv->vis.my_info = NULL;
-	spin_unlock_bh(&bat_priv->vis.hash_lock);
-}