1 files changed, 0 insertions, 520 deletions
diff --git a/drivers/staging/batman-adv/hard-interface.c b/drivers/staging/batman-adv/hard-interface.c
deleted file mode 100644
index befd4883951..00000000000
--- a/drivers/staging/batman-adv/hard-interface.c
+++ /dev/null
@@ -1,520 +0,0 @@
-/*
- * Copyright (C) 2007-2009 B.A.T.M.A.N. contributors:
- *
- * Marek Lindner, 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 "hard-interface.h"
-#include "soft-interface.h"
-#include "send.h"
-#include "translation-table.h"
-#include "routing.h"
-#include "hash.h"
-
-#define MIN(x, y) ((x) < (y) ? (x) : (y))
-
-static char avail_ifs;
-static char active_ifs;
-
-static void hardif_free_interface(struct rcu_head *rcu);
-
-static struct batman_if *get_batman_if_by_name(char *name)
-{
-	struct batman_if *batman_if;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (strncmp(batman_if->dev, name, IFNAMSIZ) == 0)
-			goto out;
-	}
-
-	batman_if = NULL;
-
-out:
-	rcu_read_unlock();
-	return batman_if;
-}
-
-int hardif_min_mtu(void)
-{
-	struct batman_if *batman_if;
-	/* allow big frames if all devices are capable to do so
-	 * (have MTU > 1500 + BAT_HEADER_LEN) */
-	int min_mtu = ETH_DATA_LEN;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if ((batman_if->if_active == IF_ACTIVE) ||
-		    (batman_if->if_active == IF_TO_BE_ACTIVATED))
-			min_mtu = MIN(batman_if->net_dev->mtu - BAT_HEADER_LEN,
-				      min_mtu);
-	}
-	rcu_read_unlock();
-
-	return min_mtu;
-}
-
-static void check_known_mac_addr(uint8_t *addr)
-{
-	struct batman_if *batman_if;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if ((batman_if->if_active != IF_ACTIVE) &&
-		    (batman_if->if_active != IF_TO_BE_ACTIVATED))
-			continue;
-
-		if (!compare_orig(batman_if->net_dev->dev_addr, addr))
-			continue;
-
-		printk(KERN_WARNING "batman-adv:The newly added mac address (%pM) already exists on: %s\n",
-		       addr, batman_if->dev);
-		printk(KERN_WARNING "batman-adv:It is strongly recommended to keep mac addresses unique to avoid problems!\n");
-	}
-	rcu_read_unlock();
-}
-
-/* adjusts the MTU if a new interface with a smaller MTU appeared. */
-void update_min_mtu(void)
-{
-	int min_mtu;
-
-	min_mtu = hardif_min_mtu();
-	if (soft_device->mtu != min_mtu)
-		soft_device->mtu = min_mtu;
-}
-
-/* checks if the interface is up. (returns 1 if it is) */
-static int hardif_is_interface_up(char *dev)
-{
-	struct net_device *net_dev;
-
-	/**
-	 * if we already have an interface in our interface list and
-	 * the current interface is not the primary interface and
-	 * the primary interface is not up and
-	 * the primary interface has never been up - don't activate any
-	 * secondary interface !
-	 */
-
-	rcu_read_lock();
-	if ((!list_empty(&if_list)) &&
-	    strncmp(((struct batman_if *)if_list.next)->dev, dev, IFNAMSIZ) &&
-	    !(((struct batman_if *)if_list.next)->if_active == IF_ACTIVE) &&
-	    !(((struct batman_if *)if_list.next)->if_active == IF_TO_BE_ACTIVATED) &&
-	    (!main_if_was_up())) {
-		rcu_read_unlock();
-		goto end;
-	}
-	rcu_read_unlock();
-
-#ifdef __NET_NET_NAMESPACE_H
-	net_dev = dev_get_by_name(&init_net, dev);
-#else
-	net_dev = dev_get_by_name(dev);
-#endif
-	if (!net_dev)
-		goto end;
-
-	if (!(net_dev->flags & IFF_UP))
-		goto failure;
-
-	dev_put(net_dev);
-	return 1;
-
-failure:
-	dev_put(net_dev);
-end:
-	return 0;
-}
-
-/* deactivates the interface. */
-void hardif_deactivate_interface(struct batman_if *batman_if)
-{
-	if (batman_if->if_active != IF_ACTIVE)
-		return;
-
-	/**
-	 * batman_if->net_dev has been acquired by dev_get_by_name() in
-	 * proc_interfaces_write() and has to be unreferenced.
-	 */
-
-	if (batman_if->net_dev)
-		dev_put(batman_if->net_dev);
-
-	batman_if->if_active = IF_INACTIVE;
-	active_ifs--;
-
-	printk(KERN_INFO "batman-adv:Interface deactivated: %s\n",
-		  batman_if->dev);
-}
-
-/* (re)activate given interface. */
-static void hardif_activate_interface(struct batman_if *batman_if)
-{
-	if (batman_if->if_active != IF_INACTIVE)
-		return;
-
-#ifdef __NET_NET_NAMESPACE_H
-	batman_if->net_dev = dev_get_by_name(&init_net, batman_if->dev);
-#else
-	batman_if->net_dev = dev_get_by_name(batman_if->dev);
-#endif
-	if (!batman_if->net_dev)
-		goto dev_err;
-
-	check_known_mac_addr(batman_if->net_dev->dev_addr);
-
-	addr_to_string(batman_if->addr_str, batman_if->net_dev->dev_addr);
-
-	memcpy(((struct batman_packet *)(batman_if->packet_buff))->orig,
-	       batman_if->net_dev->dev_addr, ETH_ALEN);
-	memcpy(((struct batman_packet *)(batman_if->packet_buff))->prev_sender,
-	       batman_if->net_dev->dev_addr, ETH_ALEN);
-
-	batman_if->if_active = IF_TO_BE_ACTIVATED;
-	active_ifs++;
-
-	/* save the mac address if it is our primary interface */
-	if (batman_if->if_num == 0)
-		set_main_if_addr(batman_if->net_dev->dev_addr);
-
-	printk(KERN_INFO "batman-adv:Interface activated: %s\n",
-		  batman_if->dev);
-
-	return;
-
-dev_err:
-	batman_if->net_dev = NULL;
-}
-
-static void hardif_free_interface(struct rcu_head *rcu)
-{
-	struct batman_if *batman_if = container_of(rcu, struct batman_if, rcu);
-
-	kfree(batman_if->packet_buff);
-	kfree(batman_if->dev);
-	kfree(batman_if);
-}
-
-/**
- * called by
- *  - echo '' > /proc/.../interfaces
- *  - modprobe -r batman-adv-core
- */
-/* removes and frees all interfaces */
-void hardif_remove_interfaces(void)
-{
-	struct batman_if *batman_if = NULL;
-
-	avail_ifs = 0;
-
-	/* no lock needed - we don't delete somewhere else */
-	list_for_each_entry(batman_if, &if_list, list) {
-
-		list_del_rcu(&batman_if->list);
-
-		/* first deactivate interface */
-		if (batman_if->if_active != IF_INACTIVE)
-			hardif_deactivate_interface(batman_if);
-
-		call_rcu(&batman_if->rcu, hardif_free_interface);
-	}
-}
-
-static int resize_orig(struct orig_node *orig_node, int if_num)
-{
-	void *data_ptr;
-
-	data_ptr = kmalloc((if_num + 1) * sizeof(TYPE_OF_WORD) * NUM_WORDS,
-			   GFP_ATOMIC);
-	if (!data_ptr) {
-		printk(KERN_ERR "batman-adv:Can't resize orig: out of memory\n");
-		return -1;
-	}
-
-	memcpy(data_ptr, orig_node->bcast_own,
-	       if_num * sizeof(TYPE_OF_WORD) * NUM_WORDS);
-	kfree(orig_node->bcast_own);
-	orig_node->bcast_own = data_ptr;
-
-	data_ptr = kmalloc((if_num + 1) * sizeof(uint8_t), GFP_ATOMIC);
-	if (!data_ptr) {
-		printk(KERN_ERR "batman-adv:Can't resize orig: out of memory\n");
-		return -1;
-	}
-
-	memcpy(data_ptr, orig_node->bcast_own_sum, if_num * sizeof(uint8_t));
-	kfree(orig_node->bcast_own_sum);
-	orig_node->bcast_own_sum = data_ptr;
-
-	return 0;
-}
-
-
-/* adds an interface the interface list and activate it, if possible */
-int hardif_add_interface(char *dev, int if_num)
-{
-	struct batman_if *batman_if;
-	struct batman_packet *batman_packet;
-	struct orig_node *orig_node;
-	unsigned long flags;
-	HASHIT(hashit);
-
-	batman_if = kmalloc(sizeof(struct batman_if), GFP_KERNEL);
-
-	if (!batman_if) {
-		printk(KERN_ERR "batman-adv:Can't add interface (%s): out of memory\n", dev);
-		return -1;
-	}
-
-	batman_if->net_dev = NULL;
-
-	if ((if_num == 0) && (num_hna > 0))
-		batman_if->packet_len = BAT_PACKET_LEN + num_hna * ETH_ALEN;
-	else
-		batman_if->packet_len = BAT_PACKET_LEN;
-
-	batman_if->packet_buff = kmalloc(batman_if->packet_len, GFP_KERNEL);
-
-	if (!batman_if->packet_buff) {
-		printk(KERN_ERR "batman-adv:Can't add interface packet (%s): out of memory\n", dev);
-		goto out;
-	}
-
-	batman_if->if_num = if_num;
-	batman_if->dev = dev;
-	batman_if->if_active = IF_INACTIVE;
-	INIT_RCU_HEAD(&batman_if->rcu);
-
-	printk(KERN_INFO "batman-adv:Adding interface: %s\n", dev);
-	avail_ifs++;
-
-	INIT_LIST_HEAD(&batman_if->list);
-
-	batman_packet = (struct batman_packet *)(batman_if->packet_buff);
-	batman_packet->packet_type = BAT_PACKET;
-	batman_packet->version = COMPAT_VERSION;
-	batman_packet->flags = 0x00;
-	batman_packet->ttl = (batman_if->if_num > 0 ? 2 : TTL);
-	batman_packet->flags = 0;
-	batman_packet->tq = TQ_MAX_VALUE;
-	batman_packet->num_hna = 0;
-
-	if (batman_if->packet_len != BAT_PACKET_LEN) {
-		unsigned char *hna_buff;
-		int hna_len;
-
-		hna_buff = batman_if->packet_buff + BAT_PACKET_LEN;
-		hna_len = batman_if->packet_len - BAT_PACKET_LEN;
-		batman_packet->num_hna = hna_local_fill_buffer(hna_buff,
-							       hna_len);
-	}
-
-	atomic_set(&batman_if->seqno, 1);
-
-	/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
-	 * if_num */
-	spin_lock_irqsave(&orig_hash_lock, flags);
-
-	while (hash_iterate(orig_hash, &hashit)) {
-		orig_node = hashit.bucket->data;
-		if (resize_orig(orig_node, if_num) == -1) {
-			spin_unlock_irqrestore(&orig_hash_lock, flags);
-			goto out;
-		}
-	}
-
-	spin_unlock_irqrestore(&orig_hash_lock, flags);
-
-	if (!hardif_is_interface_up(batman_if->dev))
-		printk(KERN_ERR "batman-adv:Not using interface %s (retrying later): interface not active\n", batman_if->dev);
-	else
-		hardif_activate_interface(batman_if);
-
-	list_add_tail_rcu(&batman_if->list, &if_list);
-
-	/* begin sending originator messages on that interface */
-	schedule_own_packet(batman_if);
-	return 1;
-
-out:
-	kfree(batman_if->packet_buff);
-	kfree(batman_if);
-	kfree(dev);
-	return -1;
-}
-
-char hardif_get_active_if_num(void)
-{
-	return active_ifs;
-}
-
-static int hard_if_event(struct notifier_block *this,
-			    unsigned long event, void *ptr)
-{
-	struct net_device *dev = (struct net_device *)ptr;
-	struct batman_if *batman_if = get_batman_if_by_name(dev->name);
-
-	if (!batman_if)
-		goto out;
-
-	switch (event) {
-	case NETDEV_GOING_DOWN:
-	case NETDEV_DOWN:
-	case NETDEV_UNREGISTER:
-		hardif_deactivate_interface(batman_if);
-		break;
-	case NETDEV_UP:
-		hardif_activate_interface(batman_if);
-		if ((atomic_read(&module_state) == MODULE_INACTIVE) &&
-		    (hardif_get_active_if_num() > 0)) {
-			activate_module();
-		}
-		break;
-	/* NETDEV_CHANGEADDR - mac address change - what are we doing here ? */
-	default:
-		break;
-	};
-
-	update_min_mtu();
-
-out:
-	return NOTIFY_DONE;
-}
-
-/* find batman interface by netdev. assumes rcu_read_lock on */
-static struct batman_if *find_batman_if(struct net_device *dev)
-{
-	struct batman_if *batman_if;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (batman_if->net_dev == dev) {
-			rcu_read_unlock();
-			return batman_if;
-		}
-	}
-	rcu_read_unlock();
-	return NULL;
-}
-
-
-/* receive a packet with the batman ethertype coming on a hard
- * interface */
-int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
-	struct packet_type *ptype, struct net_device *orig_dev)
-{
-	struct batman_packet *batman_packet;
-	struct batman_if *batman_if;
-	struct net_device_stats *stats;
-	int ret;
-
-	skb = skb_share_check(skb, GFP_ATOMIC);
-
-	/* skb was released by skb_share_check() */
-	if (!skb)
-		goto err_out;
-
-	if (atomic_read(&module_state) != MODULE_ACTIVE)
-		goto err_free;
-
-	/* packet should hold at least type and version */
-	if (unlikely(skb_headlen(skb) < 2))
-		goto err_free;
-
-	/* expect a valid ethernet header here. */
-	if (unlikely(skb->mac_len != sizeof(struct ethhdr)
-				|| !skb_mac_header(skb)))
-		goto err_free;
-
-	batman_if = find_batman_if(skb->dev);
-	if (!batman_if)
-		goto err_free;
-
-	/* discard frames on not active interfaces */
-	if (batman_if->if_active != IF_ACTIVE)
-		goto err_free;
-
-	stats = (struct net_device_stats *)dev_get_stats(skb->dev);
-	if (stats) {
-		stats->rx_packets++;
-		stats->rx_bytes += skb->len;
-	}
-
-	batman_packet = (struct batman_packet *)skb->data;
-
-	if (batman_packet->version != COMPAT_VERSION) {
-		bat_dbg(DBG_BATMAN,
-			"Drop packet: incompatible batman version (%i)\n",
-			batman_packet->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_packet->packet_type) {
-		/* batman originator packet */
-	case BAT_PACKET:
-		ret = recv_bat_packet(skb, batman_if);
-		break;
-
-		/* batman icmp packet */
-	case BAT_ICMP:
-		ret = recv_icmp_packet(skb);
-		break;
-
-		/* unicast packet */
-	case BAT_UNICAST:
-		ret = recv_unicast_packet(skb);
-		break;
-
-		/* broadcast packet */
-	case BAT_BCAST:
-		ret = recv_bcast_packet(skb);
-		break;
-
-		/* vis packet */
-	case BAT_VIS:
-		ret = recv_vis_packet(skb);
-		break;
-	default:
-		ret = NET_RX_DROP;
-	}
-
-	if (ret == NET_RX_DROP)
-		kfree_skb(skb);
-
-	/* return NET_RX_SUCCESS in any case as we
-	 * most probably dropped the packet for
-	 * routing-logical reasons. */
-
-	return NET_RX_SUCCESS;
-
-err_free:
-	kfree_skb(skb);
-err_out:
-	return NET_RX_DROP;
-}
-
-
-struct notifier_block hard_if_notifier = {
-	.notifier_call = hard_if_event,
-};