1 files changed, 0 insertions, 647 deletions
diff --git a/drivers/staging/batman-adv/hard-interface.c b/drivers/staging/batman-adv/hard-interface.c
deleted file mode 100644
index d85de82f941a..000000000000
--- a/drivers/staging/batman-adv/hard-interface.c
+++ /dev/null
@@ -1,647 +0,0 @@
-/*
- * Copyright (C) 2007-2010 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 "bat_sysfs.h"
-#include "originator.h"
-#include "hash.h"
-
-#include <linux/if_arp.h>
-
-#define MIN(x, y) ((x) < (y) ? (x) : (y))
-
-/* protect update critical side of if_list - but not the content */
-static DEFINE_SPINLOCK(if_list_lock);
-
-struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev)
-{
-	struct batman_if *batman_if;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (batman_if->net_dev == net_dev)
-			goto out;
-	}
-
-	batman_if = NULL;
-
-out:
-	if (batman_if)
-		hardif_hold(batman_if);
-
-	rcu_read_unlock();
-	return batman_if;
-}
-
-static int is_valid_iface(struct net_device *net_dev)
-{
-	if (net_dev->flags & IFF_LOOPBACK)
-		return 0;
-
-	if (net_dev->type != ARPHRD_ETHER)
-		return 0;
-
-	if (net_dev->addr_len != ETH_ALEN)
-		return 0;
-
-	/* no batman over batman */
-#ifdef HAVE_NET_DEVICE_OPS
-	if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
-		return 0;
-#else
-	if (net_dev->hard_start_xmit == interface_tx)
-		return 0;
-#endif
-
-	/* Device is being bridged */
-	/* if (net_dev->priv_flags & IFF_BRIDGE_PORT)
-		return 0; */
-
-	return 1;
-}
-
-static struct batman_if *get_active_batman_if(struct net_device *soft_iface)
-{
-	struct batman_if *batman_if;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (batman_if->soft_iface != soft_iface)
-			continue;
-
-		if (batman_if->if_status == IF_ACTIVE)
-			goto out;
-	}
-
-	batman_if = NULL;
-
-out:
-	if (batman_if)
-		hardif_hold(batman_if);
-
-	rcu_read_unlock();
-	return batman_if;
-}
-
-static void update_primary_addr(struct bat_priv *bat_priv)
-{
-	struct vis_packet *vis_packet;
-
-	vis_packet = (struct vis_packet *)
-				bat_priv->my_vis_info->skb_packet->data;
-	memcpy(vis_packet->vis_orig,
-	       bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
-	memcpy(vis_packet->sender_orig,
-	       bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
-}
-
-static void set_primary_if(struct bat_priv *bat_priv,
-			   struct batman_if *batman_if)
-{
-	struct batman_packet *batman_packet;
-	struct batman_if *old_if;
-
-	if (batman_if)
-		hardif_hold(batman_if);
-
-	old_if = bat_priv->primary_if;
-	bat_priv->primary_if = batman_if;
-
-	if (old_if)
-		hardif_put(old_if);
-
-	if (!bat_priv->primary_if)
-		return;
-
-	batman_packet = (struct batman_packet *)(batman_if->packet_buff);
-	batman_packet->flags = PRIMARIES_FIRST_HOP;
-	batman_packet->ttl = TTL;
-
-	update_primary_addr(bat_priv);
-
-	/***
-	 * hacky trick to make sure that we send the HNA information via
-	 * our new primary interface
-	 */
-	atomic_set(&bat_priv->hna_local_changed, 1);
-}
-
-static bool hardif_is_iface_up(struct batman_if *batman_if)
-{
-	if (batman_if->net_dev->flags & IFF_UP)
-		return true;
-
-	return false;
-}
-
-static void update_mac_addresses(struct batman_if *batman_if)
-{
-	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);
-}
-
-static void check_known_mac_addr(struct net_device *net_dev)
-{
-	struct batman_if *batman_if;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if ((batman_if->if_status != IF_ACTIVE) &&
-		    (batman_if->if_status != IF_TO_BE_ACTIVATED))
-			continue;
-
-		if (batman_if->net_dev == net_dev)
-			continue;
-
-		if (!compare_orig(batman_if->net_dev->dev_addr,
-				  net_dev->dev_addr))
-			continue;
-
-		pr_warning("The newly added mac address (%pM) already exists "
-			   "on: %s\n", net_dev->dev_addr,
-			   batman_if->net_dev->name);
-		pr_warning("It is strongly recommended to keep mac addresses "
-			   "unique to avoid problems!\n");
-	}
-	rcu_read_unlock();
-}
-
-int hardif_min_mtu(struct net_device *soft_iface)
-{
-	struct bat_priv *bat_priv = netdev_priv(soft_iface);
-	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;
-
-	if (atomic_read(&bat_priv->frag_enabled))
-		goto out;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if ((batman_if->if_status != IF_ACTIVE) &&
-		    (batman_if->if_status != IF_TO_BE_ACTIVATED))
-			continue;
-
-		if (batman_if->soft_iface != soft_iface)
-			continue;
-
-		min_mtu = MIN(batman_if->net_dev->mtu - BAT_HEADER_LEN,
-			      min_mtu);
-	}
-	rcu_read_unlock();
-out:
-	return min_mtu;
-}
-
-/* adjusts the MTU if a new interface with a smaller MTU appeared. */
-void update_min_mtu(struct net_device *soft_iface)
-{
-	int min_mtu;
-
-	min_mtu = hardif_min_mtu(soft_iface);
-	if (soft_iface->mtu != min_mtu)
-		soft_iface->mtu = min_mtu;
-}
-
-static void hardif_activate_interface(struct batman_if *batman_if)
-{
-	struct bat_priv *bat_priv;
-
-	if (batman_if->if_status != IF_INACTIVE)
-		return;
-
-	bat_priv = netdev_priv(batman_if->soft_iface);
-
-	update_mac_addresses(batman_if);
-	batman_if->if_status = IF_TO_BE_ACTIVATED;
-
-	/**
-	 * the first active interface becomes our primary interface or
-	 * the next active interface after the old primay interface was removed
-	 */
-	if (!bat_priv->primary_if)
-		set_primary_if(bat_priv, batman_if);
-
-	bat_info(batman_if->soft_iface, "Interface activated: %s\n",
-		 batman_if->net_dev->name);
-
-	update_min_mtu(batman_if->soft_iface);
-	return;
-}
-
-static void hardif_deactivate_interface(struct batman_if *batman_if)
-{
-	if ((batman_if->if_status != IF_ACTIVE) &&
-	   (batman_if->if_status != IF_TO_BE_ACTIVATED))
-		return;
-
-	batman_if->if_status = IF_INACTIVE;
-
-	bat_info(batman_if->soft_iface, "Interface deactivated: %s\n",
-		 batman_if->net_dev->name);
-
-	update_min_mtu(batman_if->soft_iface);
-}
-
-int hardif_enable_interface(struct batman_if *batman_if, char *iface_name)
-{
-	struct bat_priv *bat_priv;
-	struct batman_packet *batman_packet;
-
-	if (batman_if->if_status != IF_NOT_IN_USE)
-		goto out;
-
-	batman_if->soft_iface = dev_get_by_name(&init_net, iface_name);
-
-	if (!batman_if->soft_iface) {
-		batman_if->soft_iface = softif_create(iface_name);
-
-		if (!batman_if->soft_iface)
-			goto err;
-
-		/* dev_get_by_name() increases the reference counter for us */
-		dev_hold(batman_if->soft_iface);
-	}
-
-	bat_priv = netdev_priv(batman_if->soft_iface);
-	batman_if->packet_len = BAT_PACKET_LEN;
-	batman_if->packet_buff = kmalloc(batman_if->packet_len, GFP_ATOMIC);
-
-	if (!batman_if->packet_buff) {
-		bat_err(batman_if->soft_iface, "Can't add interface packet "
-			"(%s): out of memory\n", batman_if->net_dev->name);
-		goto err;
-	}
-
-	batman_packet = (struct batman_packet *)(batman_if->packet_buff);
-	batman_packet->packet_type = BAT_PACKET;
-	batman_packet->version = COMPAT_VERSION;
-	batman_packet->flags = 0;
-	batman_packet->ttl = 2;
-	batman_packet->tq = TQ_MAX_VALUE;
-	batman_packet->num_hna = 0;
-
-	batman_if->if_num = bat_priv->num_ifaces;
-	bat_priv->num_ifaces++;
-	batman_if->if_status = IF_INACTIVE;
-	orig_hash_add_if(batman_if, bat_priv->num_ifaces);
-
-	batman_if->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN);
-	batman_if->batman_adv_ptype.func = batman_skb_recv;
-	batman_if->batman_adv_ptype.dev = batman_if->net_dev;
-	hardif_hold(batman_if);
-	dev_add_pack(&batman_if->batman_adv_ptype);
-
-	atomic_set(&batman_if->seqno, 1);
-	atomic_set(&batman_if->frag_seqno, 1);
-	bat_info(batman_if->soft_iface, "Adding interface: %s\n",
-		 batman_if->net_dev->name);
-
-	if (atomic_read(&bat_priv->frag_enabled) && batman_if->net_dev->mtu <
-		ETH_DATA_LEN + BAT_HEADER_LEN)
-		bat_info(batman_if->soft_iface,
-			"The MTU of interface %s is too small (%i) to handle "
-			"the transport of batman-adv packets. Packets going "
-			"over this interface will be fragmented on layer2 "
-			"which could impact the performance. Setting the MTU "
-			"to %zi would solve the problem.\n",
-			batman_if->net_dev->name, batman_if->net_dev->mtu,
-			ETH_DATA_LEN + BAT_HEADER_LEN);
-
-	if (!atomic_read(&bat_priv->frag_enabled) && batman_if->net_dev->mtu <
-		ETH_DATA_LEN + BAT_HEADER_LEN)
-		bat_info(batman_if->soft_iface,
-			"The MTU of interface %s is too small (%i) to handle "
-			"the transport of batman-adv packets. If you experience"
-			" problems getting traffic through try increasing the "
-			"MTU to %zi.\n",
-			batman_if->net_dev->name, batman_if->net_dev->mtu,
-			ETH_DATA_LEN + BAT_HEADER_LEN);
-
-	if (hardif_is_iface_up(batman_if))
-		hardif_activate_interface(batman_if);
-	else
-		bat_err(batman_if->soft_iface, "Not using interface %s "
-			"(retrying later): interface not active\n",
-			batman_if->net_dev->name);
-
-	/* begin scheduling originator messages on that interface */
-	schedule_own_packet(batman_if);
-
-out:
-	return 0;
-
-err:
-	return -ENOMEM;
-}
-
-void hardif_disable_interface(struct batman_if *batman_if)
-{
-	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
-
-	if (batman_if->if_status == IF_ACTIVE)
-		hardif_deactivate_interface(batman_if);
-
-	if (batman_if->if_status != IF_INACTIVE)
-		return;
-
-	bat_info(batman_if->soft_iface, "Removing interface: %s\n",
-		 batman_if->net_dev->name);
-	dev_remove_pack(&batman_if->batman_adv_ptype);
-	hardif_put(batman_if);
-
-	bat_priv->num_ifaces--;
-	orig_hash_del_if(batman_if, bat_priv->num_ifaces);
-
-	if (batman_if == bat_priv->primary_if) {
-		struct batman_if *new_if;
-
-		new_if = get_active_batman_if(batman_if->soft_iface);
-		set_primary_if(bat_priv, new_if);
-
-		if (new_if)
-			hardif_put(new_if);
-	}
-
-	kfree(batman_if->packet_buff);
-	batman_if->packet_buff = NULL;
-	batman_if->if_status = IF_NOT_IN_USE;
-
-	/* delete all references to this batman_if */
-	purge_orig_ref(bat_priv);
-	purge_outstanding_packets(bat_priv, batman_if);
-	dev_put(batman_if->soft_iface);
-
-	/* nobody uses this interface anymore */
-	if (!bat_priv->num_ifaces)
-		softif_destroy(batman_if->soft_iface);
-
-	batman_if->soft_iface = NULL;
-}
-
-static struct batman_if *hardif_add_interface(struct net_device *net_dev)
-{
-	struct batman_if *batman_if;
-	int ret;
-
-	ret = is_valid_iface(net_dev);
-	if (ret != 1)
-		goto out;
-
-	dev_hold(net_dev);
-
-	batman_if = kmalloc(sizeof(struct batman_if), GFP_ATOMIC);
-	if (!batman_if) {
-		pr_err("Can't add interface (%s): out of memory\n",
-		       net_dev->name);
-		goto release_dev;
-	}
-
-	ret = sysfs_add_hardif(&batman_if->hardif_obj, net_dev);
-	if (ret)
-		goto free_if;
-
-	batman_if->if_num = -1;
-	batman_if->net_dev = net_dev;
-	batman_if->soft_iface = NULL;
-	batman_if->if_status = IF_NOT_IN_USE;
-	INIT_LIST_HEAD(&batman_if->list);
-	atomic_set(&batman_if->refcnt, 0);
-	hardif_hold(batman_if);
-
-	check_known_mac_addr(batman_if->net_dev);
-
-	spin_lock(&if_list_lock);
-	list_add_tail_rcu(&batman_if->list, &if_list);
-	spin_unlock(&if_list_lock);
-
-	/* extra reference for return */
-	hardif_hold(batman_if);
-	return batman_if;
-
-free_if:
-	kfree(batman_if);
-release_dev:
-	dev_put(net_dev);
-out:
-	return NULL;
-}
-
-static void hardif_remove_interface(struct batman_if *batman_if)
-{
-	/* first deactivate interface */
-	if (batman_if->if_status != IF_NOT_IN_USE)
-		hardif_disable_interface(batman_if);
-
-	if (batman_if->if_status != IF_NOT_IN_USE)
-		return;
-
-	batman_if->if_status = IF_TO_BE_REMOVED;
-	synchronize_rcu();
-	sysfs_del_hardif(&batman_if->hardif_obj);
-	hardif_put(batman_if);
-}
-
-void hardif_remove_interfaces(void)
-{
-	struct batman_if *batman_if, *batman_if_tmp;
-	struct list_head if_queue;
-
-	INIT_LIST_HEAD(&if_queue);
-
-	spin_lock(&if_list_lock);
-	list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list) {
-		list_del_rcu(&batman_if->list);
-		list_add_tail(&batman_if->list, &if_queue);
-	}
-	spin_unlock(&if_list_lock);
-
-	rtnl_lock();
-	list_for_each_entry_safe(batman_if, batman_if_tmp, &if_queue, list) {
-		hardif_remove_interface(batman_if);
-	}
-	rtnl_unlock();
-}
-
-static int hard_if_event(struct notifier_block *this,
-			 unsigned long event, void *ptr)
-{
-	struct net_device *net_dev = (struct net_device *)ptr;
-	struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
-	struct bat_priv *bat_priv;
-
-	if (!batman_if && event == NETDEV_REGISTER)
-		batman_if = hardif_add_interface(net_dev);
-
-	if (!batman_if)
-		goto out;
-
-	switch (event) {
-	case NETDEV_UP:
-		hardif_activate_interface(batman_if);
-		break;
-	case NETDEV_GOING_DOWN:
-	case NETDEV_DOWN:
-		hardif_deactivate_interface(batman_if);
-		break;
-	case NETDEV_UNREGISTER:
-		spin_lock(&if_list_lock);
-		list_del_rcu(&batman_if->list);
-		spin_unlock(&if_list_lock);
-
-		hardif_remove_interface(batman_if);
-		break;
-	case NETDEV_CHANGEMTU:
-		if (batman_if->soft_iface)
-			update_min_mtu(batman_if->soft_iface);
-		break;
-	case NETDEV_CHANGEADDR:
-		if (batman_if->if_status == IF_NOT_IN_USE) {
-			hardif_put(batman_if);
-			goto out;
-		}
-
-		check_known_mac_addr(batman_if->net_dev);
-		update_mac_addresses(batman_if);
-
-		bat_priv = netdev_priv(batman_if->soft_iface);
-		if (batman_if == bat_priv->primary_if)
-			update_primary_addr(bat_priv);
-		break;
-	default:
-		break;
-	};
-	hardif_put(batman_if);
-
-out:
-	return NOTIFY_DONE;
-}
-
-/* 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 bat_priv *bat_priv;
-	struct batman_packet *batman_packet;
-	struct batman_if *batman_if;
-	int ret;
-
-	batman_if = container_of(ptype, struct batman_if, batman_adv_ptype);
-	skb = skb_share_check(skb, GFP_ATOMIC);
-
-	/* skb was released by skb_share_check() */
-	if (!skb)
-		goto err_out;
-
-	/* packet should hold at least type and version */
-	if (unlikely(!pskb_may_pull(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;
-
-	if (!batman_if->soft_iface)
-		goto err_free;
-
-	bat_priv = netdev_priv(batman_if->soft_iface);
-
-	if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
-		goto err_free;
-
-	/* discard frames on not active interfaces */
-	if (batman_if->if_status != IF_ACTIVE)
-		goto err_free;
-
-	batman_packet = (struct batman_packet *)skb->data;
-
-	if (batman_packet->version != COMPAT_VERSION) {
-		bat_dbg(DBG_BATMAN, bat_priv,
-			"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, batman_if);
-		break;
-
-		/* unicast packet */
-	case BAT_UNICAST:
-		ret = recv_unicast_packet(skb, batman_if);
-		break;
-
-		/* fragmented unicast packet */
-	case BAT_UNICAST_FRAG:
-		ret = recv_ucast_frag_packet(skb, batman_if);
-		break;
-
-		/* broadcast packet */
-	case BAT_BCAST:
-		ret = recv_bcast_packet(skb, batman_if);
-		break;
-
-		/* vis packet */
-	case BAT_VIS:
-		ret = recv_vis_packet(skb, batman_if);
-		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,
-};