2010-12-13 04:19:28 -07:00
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/*
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2011-01-27 02:38:15 -07:00
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* Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
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2010-12-13 04:19:28 -07:00
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*
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* Marek Lindner, Simon Wunderlich
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*
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*/
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#include "main.h"
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#include "hard-interface.h"
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#include "soft-interface.h"
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#include "send.h"
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#include "translation-table.h"
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#include "routing.h"
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#include "bat_sysfs.h"
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#include "originator.h"
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#include "hash.h"
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#include <linux/if_arp.h>
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2011-02-18 05:33:19 -07:00
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/* protect update critical side of hardif_list - but not the content */
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static DEFINE_SPINLOCK(hardif_list_lock);
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2010-12-13 04:19:28 -07:00
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2011-01-27 05:16:08 -07:00
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static int batman_skb_recv(struct sk_buff *skb,
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struct net_device *dev,
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struct packet_type *ptype,
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struct net_device *orig_dev);
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2011-02-10 07:33:51 -07:00
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void hardif_free_rcu(struct rcu_head *rcu)
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2010-12-13 04:19:28 -07:00
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{
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2011-02-18 05:33:20 -07:00
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struct hard_iface *hard_iface;
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2010-12-13 04:19:28 -07:00
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2011-02-18 05:33:20 -07:00
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hard_iface = container_of(rcu, struct hard_iface, rcu);
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dev_put(hard_iface->net_dev);
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kfree(hard_iface);
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2010-12-13 04:19:28 -07:00
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}
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2011-02-18 05:33:20 -07:00
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struct hard_iface *hardif_get_by_netdev(struct net_device *net_dev)
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2010-12-13 04:19:28 -07:00
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{
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2011-02-18 05:33:20 -07:00
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struct hard_iface *hard_iface;
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2010-12-13 04:19:28 -07:00
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rcu_read_lock();
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2011-02-18 05:33:20 -07:00
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list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
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if (hard_iface->net_dev == net_dev &&
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atomic_inc_not_zero(&hard_iface->refcount))
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2010-12-13 04:19:28 -07:00
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goto out;
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}
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2011-02-18 05:33:20 -07:00
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hard_iface = NULL;
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2010-12-13 04:19:28 -07:00
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out:
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rcu_read_unlock();
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2011-02-18 05:33:20 -07:00
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return hard_iface;
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2010-12-13 04:19:28 -07:00
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}
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static int is_valid_iface(struct net_device *net_dev)
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{
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if (net_dev->flags & IFF_LOOPBACK)
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return 0;
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if (net_dev->type != ARPHRD_ETHER)
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return 0;
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if (net_dev->addr_len != ETH_ALEN)
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return 0;
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/* no batman over batman */
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2011-03-04 14:36:41 -07:00
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if (softif_is_valid(net_dev))
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2010-12-13 04:19:28 -07:00
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return 0;
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/* Device is being bridged */
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/* if (net_dev->priv_flags & IFF_BRIDGE_PORT)
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return 0; */
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return 1;
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}
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2011-02-18 05:33:20 -07:00
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static struct hard_iface *hardif_get_active(struct net_device *soft_iface)
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2010-12-13 04:19:28 -07:00
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{
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2011-02-18 05:33:20 -07:00
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struct hard_iface *hard_iface;
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2010-12-13 04:19:28 -07:00
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rcu_read_lock();
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2011-02-18 05:33:20 -07:00
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list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
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if (hard_iface->soft_iface != soft_iface)
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2010-12-13 04:19:28 -07:00
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continue;
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2011-02-18 05:33:20 -07:00
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if (hard_iface->if_status == IF_ACTIVE &&
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atomic_inc_not_zero(&hard_iface->refcount))
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2010-12-13 04:19:28 -07:00
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goto out;
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}
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2011-02-18 05:33:20 -07:00
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hard_iface = NULL;
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2010-12-13 04:19:28 -07:00
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out:
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rcu_read_unlock();
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2011-02-18 05:33:20 -07:00
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return hard_iface;
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2010-12-13 04:19:28 -07:00
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}
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2011-04-20 06:40:58 -07:00
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static void primary_if_update_addr(struct bat_priv *bat_priv)
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2010-12-13 04:19:28 -07:00
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{
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struct vis_packet *vis_packet;
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2011-04-20 06:40:58 -07:00
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struct hard_iface *primary_if;
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primary_if = primary_if_get_selected(bat_priv);
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if (!primary_if)
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goto out;
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2010-12-13 04:19:28 -07:00
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vis_packet = (struct vis_packet *)
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bat_priv->my_vis_info->skb_packet->data;
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2011-04-20 06:40:58 -07:00
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memcpy(vis_packet->vis_orig, primary_if->net_dev->dev_addr, ETH_ALEN);
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2010-12-13 04:19:28 -07:00
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memcpy(vis_packet->sender_orig,
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2011-04-20 06:40:58 -07:00
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primary_if->net_dev->dev_addr, ETH_ALEN);
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out:
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if (primary_if)
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hardif_free_ref(primary_if);
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2010-12-13 04:19:28 -07:00
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}
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2011-04-20 06:40:58 -07:00
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static void primary_if_select(struct bat_priv *bat_priv,
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struct hard_iface *new_hard_iface)
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2010-12-13 04:19:28 -07:00
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{
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2011-04-20 06:40:58 -07:00
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struct hard_iface *curr_hard_iface;
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2010-12-13 04:19:28 -07:00
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struct batman_packet *batman_packet;
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2011-04-20 06:40:58 -07:00
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spin_lock_bh(&hardif_list_lock);
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2010-12-13 04:19:28 -07:00
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2011-04-20 06:40:58 -07:00
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if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount))
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new_hard_iface = NULL;
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2010-12-13 04:19:28 -07:00
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2011-04-20 06:40:58 -07:00
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curr_hard_iface = bat_priv->primary_if;
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rcu_assign_pointer(bat_priv->primary_if, new_hard_iface);
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2010-12-13 04:19:28 -07:00
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2011-04-20 06:40:58 -07:00
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if (curr_hard_iface)
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hardif_free_ref(curr_hard_iface);
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2010-12-13 04:19:28 -07:00
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2011-04-20 06:40:58 -07:00
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if (!new_hard_iface)
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goto out;
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batman_packet = (struct batman_packet *)(new_hard_iface->packet_buff);
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2010-12-13 04:19:28 -07:00
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batman_packet->flags = PRIMARIES_FIRST_HOP;
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batman_packet->ttl = TTL;
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2011-04-20 06:40:58 -07:00
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primary_if_update_addr(bat_priv);
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2010-12-13 04:19:28 -07:00
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/***
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* hacky trick to make sure that we send the HNA information via
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* our new primary interface
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*/
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atomic_set(&bat_priv->hna_local_changed, 1);
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2011-04-20 06:40:58 -07:00
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out:
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spin_unlock_bh(&hardif_list_lock);
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2010-12-13 04:19:28 -07:00
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}
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2011-02-18 05:33:20 -07:00
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static bool hardif_is_iface_up(struct hard_iface *hard_iface)
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2010-12-13 04:19:28 -07:00
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{
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2011-02-18 05:33:20 -07:00
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if (hard_iface->net_dev->flags & IFF_UP)
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2010-12-13 04:19:28 -07:00
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return true;
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return false;
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}
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2011-02-18 05:33:20 -07:00
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static void update_mac_addresses(struct hard_iface *hard_iface)
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2010-12-13 04:19:28 -07:00
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{
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2011-02-18 05:33:20 -07:00
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memcpy(((struct batman_packet *)(hard_iface->packet_buff))->orig,
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hard_iface->net_dev->dev_addr, ETH_ALEN);
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memcpy(((struct batman_packet *)(hard_iface->packet_buff))->prev_sender,
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hard_iface->net_dev->dev_addr, ETH_ALEN);
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2010-12-13 04:19:28 -07:00
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}
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static void check_known_mac_addr(struct net_device *net_dev)
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{
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2011-02-18 05:33:20 -07:00
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struct hard_iface *hard_iface;
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2010-12-13 04:19:28 -07:00
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rcu_read_lock();
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2011-02-18 05:33:20 -07:00
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list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
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if ((hard_iface->if_status != IF_ACTIVE) &&
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(hard_iface->if_status != IF_TO_BE_ACTIVATED))
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2010-12-13 04:19:28 -07:00
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continue;
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2011-02-18 05:33:20 -07:00
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if (hard_iface->net_dev == net_dev)
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2010-12-13 04:19:28 -07:00
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continue;
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2011-02-18 05:33:20 -07:00
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if (!compare_eth(hard_iface->net_dev->dev_addr,
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net_dev->dev_addr))
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2010-12-13 04:19:28 -07:00
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continue;
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pr_warning("The newly added mac address (%pM) already exists "
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"on: %s\n", net_dev->dev_addr,
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2011-02-18 05:33:20 -07:00
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hard_iface->net_dev->name);
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2010-12-13 04:19:28 -07:00
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pr_warning("It is strongly recommended to keep mac addresses "
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"unique to avoid problems!\n");
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}
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rcu_read_unlock();
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}
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int hardif_min_mtu(struct net_device *soft_iface)
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{
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struct bat_priv *bat_priv = netdev_priv(soft_iface);
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2011-02-18 05:33:20 -07:00
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struct hard_iface *hard_iface;
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2010-12-13 04:19:28 -07:00
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/* allow big frames if all devices are capable to do so
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* (have MTU > 1500 + BAT_HEADER_LEN) */
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int min_mtu = ETH_DATA_LEN;
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if (atomic_read(&bat_priv->fragmentation))
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goto out;
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rcu_read_lock();
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2011-02-18 05:33:20 -07:00
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list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
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if ((hard_iface->if_status != IF_ACTIVE) &&
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(hard_iface->if_status != IF_TO_BE_ACTIVATED))
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2010-12-13 04:19:28 -07:00
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continue;
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2011-02-18 05:33:20 -07:00
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if (hard_iface->soft_iface != soft_iface)
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2010-12-13 04:19:28 -07:00
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continue;
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2011-02-18 05:33:20 -07:00
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min_mtu = min_t(int, hard_iface->net_dev->mtu - BAT_HEADER_LEN,
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2010-12-13 04:19:28 -07:00
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min_mtu);
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}
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rcu_read_unlock();
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out:
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return min_mtu;
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}
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/* adjusts the MTU if a new interface with a smaller MTU appeared. */
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void update_min_mtu(struct net_device *soft_iface)
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{
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int min_mtu;
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min_mtu = hardif_min_mtu(soft_iface);
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if (soft_iface->mtu != min_mtu)
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soft_iface->mtu = min_mtu;
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}
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2011-02-18 05:33:20 -07:00
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static void hardif_activate_interface(struct hard_iface *hard_iface)
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2010-12-13 04:19:28 -07:00
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{
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struct bat_priv *bat_priv;
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2011-04-20 06:40:58 -07:00
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struct hard_iface *primary_if = NULL;
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2010-12-13 04:19:28 -07:00
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2011-02-18 05:33:20 -07:00
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if (hard_iface->if_status != IF_INACTIVE)
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2011-04-20 06:40:58 -07:00
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goto out;
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2010-12-13 04:19:28 -07:00
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2011-02-18 05:33:20 -07:00
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bat_priv = netdev_priv(hard_iface->soft_iface);
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2010-12-13 04:19:28 -07:00
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2011-02-18 05:33:20 -07:00
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update_mac_addresses(hard_iface);
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hard_iface->if_status = IF_TO_BE_ACTIVATED;
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2010-12-13 04:19:28 -07:00
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/**
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* the first active interface becomes our primary interface or
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* the next active interface after the old primay interface was removed
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*/
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2011-04-20 06:40:58 -07:00
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primary_if = primary_if_get_selected(bat_priv);
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if (!primary_if)
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primary_if_select(bat_priv, hard_iface);
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2010-12-13 04:19:28 -07:00
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2011-02-18 05:33:20 -07:00
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bat_info(hard_iface->soft_iface, "Interface activated: %s\n",
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hard_iface->net_dev->name);
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2010-12-13 04:19:28 -07:00
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2011-02-18 05:33:20 -07:00
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update_min_mtu(hard_iface->soft_iface);
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2011-04-20 06:40:58 -07:00
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out:
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if (primary_if)
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hardif_free_ref(primary_if);
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2010-12-13 04:19:28 -07:00
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}
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2011-02-18 05:33:20 -07:00
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static void hardif_deactivate_interface(struct hard_iface *hard_iface)
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2010-12-13 04:19:28 -07:00
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{
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2011-02-18 05:33:20 -07:00
|
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if ((hard_iface->if_status != IF_ACTIVE) &&
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(hard_iface->if_status != IF_TO_BE_ACTIVATED))
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2010-12-13 04:19:28 -07:00
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return;
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2011-02-18 05:33:20 -07:00
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hard_iface->if_status = IF_INACTIVE;
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2010-12-13 04:19:28 -07:00
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2011-02-18 05:33:20 -07:00
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bat_info(hard_iface->soft_iface, "Interface deactivated: %s\n",
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hard_iface->net_dev->name);
|
2010-12-13 04:19:28 -07:00
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2011-02-18 05:33:20 -07:00
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update_min_mtu(hard_iface->soft_iface);
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2010-12-13 04:19:28 -07:00
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}
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|
|
2011-02-18 05:33:20 -07:00
|
|
|
int hardif_enable_interface(struct hard_iface *hard_iface, char *iface_name)
|
2010-12-13 04:19:28 -07:00
|
|
|
{
|
|
|
|
struct bat_priv *bat_priv;
|
|
|
|
struct batman_packet *batman_packet;
|
2011-03-04 14:36:41 -07:00
|
|
|
struct net_device *soft_iface;
|
|
|
|
int ret;
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (hard_iface->if_status != IF_NOT_IN_USE)
|
2010-12-13 04:19:28 -07:00
|
|
|
goto out;
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (!atomic_inc_not_zero(&hard_iface->refcount))
|
2011-02-10 07:33:51 -07:00
|
|
|
goto out;
|
|
|
|
|
2011-03-04 14:36:41 -07:00
|
|
|
soft_iface = dev_get_by_name(&init_net, iface_name);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-03-04 14:36:41 -07:00
|
|
|
if (!soft_iface) {
|
|
|
|
soft_iface = softif_create(iface_name);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-03-04 14:36:41 -07:00
|
|
|
if (!soft_iface) {
|
|
|
|
ret = -ENOMEM;
|
2010-12-13 04:19:28 -07:00
|
|
|
goto err;
|
2011-03-04 14:36:41 -07:00
|
|
|
}
|
2010-12-13 04:19:28 -07:00
|
|
|
|
|
|
|
/* dev_get_by_name() increases the reference counter for us */
|
2011-03-04 14:36:41 -07:00
|
|
|
dev_hold(soft_iface);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!softif_is_valid(soft_iface)) {
|
|
|
|
pr_err("Can't create batman mesh interface %s: "
|
|
|
|
"already exists as regular interface\n",
|
|
|
|
soft_iface->name);
|
|
|
|
dev_put(soft_iface);
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto err;
|
2010-12-13 04:19:28 -07:00
|
|
|
}
|
|
|
|
|
2011-03-04 14:36:41 -07:00
|
|
|
hard_iface->soft_iface = soft_iface;
|
2011-02-18 05:33:20 -07:00
|
|
|
bat_priv = netdev_priv(hard_iface->soft_iface);
|
|
|
|
hard_iface->packet_len = BAT_PACKET_LEN;
|
|
|
|
hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (!hard_iface->packet_buff) {
|
|
|
|
bat_err(hard_iface->soft_iface, "Can't add interface packet "
|
|
|
|
"(%s): out of memory\n", hard_iface->net_dev->name);
|
2011-03-04 14:36:41 -07:00
|
|
|
ret = -ENOMEM;
|
2010-12-13 04:19:28 -07:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
batman_packet = (struct batman_packet *)(hard_iface->packet_buff);
|
2010-12-13 04:19:28 -07:00
|
|
|
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;
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface->if_num = bat_priv->num_ifaces;
|
2010-12-13 04:19:28 -07:00
|
|
|
bat_priv->num_ifaces++;
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface->if_status = IF_INACTIVE;
|
|
|
|
orig_hash_add_if(hard_iface, bat_priv->num_ifaces);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN);
|
|
|
|
hard_iface->batman_adv_ptype.func = batman_skb_recv;
|
|
|
|
hard_iface->batman_adv_ptype.dev = hard_iface->net_dev;
|
|
|
|
dev_add_pack(&hard_iface->batman_adv_ptype);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
atomic_set(&hard_iface->seqno, 1);
|
|
|
|
atomic_set(&hard_iface->frag_seqno, 1);
|
|
|
|
bat_info(hard_iface->soft_iface, "Adding interface: %s\n",
|
|
|
|
hard_iface->net_dev->name);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu <
|
2010-12-13 04:19:28 -07:00
|
|
|
ETH_DATA_LEN + BAT_HEADER_LEN)
|
2011-02-18 05:33:20 -07:00
|
|
|
bat_info(hard_iface->soft_iface,
|
2010-12-13 04:19:28 -07:00
|
|
|
"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",
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface->net_dev->name, hard_iface->net_dev->mtu,
|
2010-12-13 04:19:28 -07:00
|
|
|
ETH_DATA_LEN + BAT_HEADER_LEN);
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (!atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu <
|
2010-12-13 04:19:28 -07:00
|
|
|
ETH_DATA_LEN + BAT_HEADER_LEN)
|
2011-02-18 05:33:20 -07:00
|
|
|
bat_info(hard_iface->soft_iface,
|
2010-12-13 04:19:28 -07:00
|
|
|
"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",
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface->net_dev->name, hard_iface->net_dev->mtu,
|
2010-12-13 04:19:28 -07:00
|
|
|
ETH_DATA_LEN + BAT_HEADER_LEN);
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (hardif_is_iface_up(hard_iface))
|
|
|
|
hardif_activate_interface(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
else
|
2011-02-18 05:33:20 -07:00
|
|
|
bat_err(hard_iface->soft_iface, "Not using interface %s "
|
2010-12-13 04:19:28 -07:00
|
|
|
"(retrying later): interface not active\n",
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface->net_dev->name);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
|
|
|
/* begin scheduling originator messages on that interface */
|
2011-02-18 05:33:20 -07:00
|
|
|
schedule_own_packet(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
|
|
|
out:
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err:
|
2011-02-18 05:33:20 -07:00
|
|
|
hardif_free_ref(hard_iface);
|
2011-03-04 14:36:41 -07:00
|
|
|
return ret;
|
2010-12-13 04:19:28 -07:00
|
|
|
}
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
void hardif_disable_interface(struct hard_iface *hard_iface)
|
2010-12-13 04:19:28 -07:00
|
|
|
{
|
2011-02-18 05:33:20 -07:00
|
|
|
struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
|
2011-04-20 06:40:58 -07:00
|
|
|
struct hard_iface *primary_if = NULL;
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (hard_iface->if_status == IF_ACTIVE)
|
|
|
|
hardif_deactivate_interface(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (hard_iface->if_status != IF_INACTIVE)
|
2011-04-20 06:40:58 -07:00
|
|
|
goto out;
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
bat_info(hard_iface->soft_iface, "Removing interface: %s\n",
|
|
|
|
hard_iface->net_dev->name);
|
|
|
|
dev_remove_pack(&hard_iface->batman_adv_ptype);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
|
|
|
bat_priv->num_ifaces--;
|
2011-02-18 05:33:20 -07:00
|
|
|
orig_hash_del_if(hard_iface, bat_priv->num_ifaces);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-04-20 06:40:58 -07:00
|
|
|
primary_if = primary_if_get_selected(bat_priv);
|
|
|
|
if (hard_iface == primary_if) {
|
2011-02-18 05:33:20 -07:00
|
|
|
struct hard_iface *new_if;
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
new_if = hardif_get_active(hard_iface->soft_iface);
|
2011-04-20 06:40:58 -07:00
|
|
|
primary_if_select(bat_priv, new_if);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
|
|
|
if (new_if)
|
2011-02-10 07:33:51 -07:00
|
|
|
hardif_free_ref(new_if);
|
2010-12-13 04:19:28 -07:00
|
|
|
}
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
kfree(hard_iface->packet_buff);
|
|
|
|
hard_iface->packet_buff = NULL;
|
|
|
|
hard_iface->if_status = IF_NOT_IN_USE;
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
/* delete all references to this hard_iface */
|
2010-12-13 04:19:28 -07:00
|
|
|
purge_orig_ref(bat_priv);
|
2011-02-18 05:33:20 -07:00
|
|
|
purge_outstanding_packets(bat_priv, hard_iface);
|
|
|
|
dev_put(hard_iface->soft_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
|
|
|
/* nobody uses this interface anymore */
|
|
|
|
if (!bat_priv->num_ifaces)
|
2011-02-18 05:33:20 -07:00
|
|
|
softif_destroy(hard_iface->soft_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface->soft_iface = NULL;
|
|
|
|
hardif_free_ref(hard_iface);
|
2011-04-20 06:40:58 -07:00
|
|
|
|
|
|
|
out:
|
|
|
|
if (primary_if)
|
|
|
|
hardif_free_ref(primary_if);
|
2010-12-13 04:19:28 -07:00
|
|
|
}
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
static struct hard_iface *hardif_add_interface(struct net_device *net_dev)
|
2010-12-13 04:19:28 -07:00
|
|
|
{
|
2011-02-18 05:33:20 -07:00
|
|
|
struct hard_iface *hard_iface;
|
2010-12-13 04:19:28 -07:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = is_valid_iface(net_dev);
|
|
|
|
if (ret != 1)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
dev_hold(net_dev);
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface = kmalloc(sizeof(struct hard_iface), GFP_ATOMIC);
|
|
|
|
if (!hard_iface) {
|
2010-12-13 04:19:28 -07:00
|
|
|
pr_err("Can't add interface (%s): out of memory\n",
|
|
|
|
net_dev->name);
|
|
|
|
goto release_dev;
|
|
|
|
}
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
ret = sysfs_add_hardif(&hard_iface->hardif_obj, net_dev);
|
2010-12-13 04:19:28 -07:00
|
|
|
if (ret)
|
|
|
|
goto free_if;
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface->if_num = -1;
|
|
|
|
hard_iface->net_dev = net_dev;
|
|
|
|
hard_iface->soft_iface = NULL;
|
|
|
|
hard_iface->if_status = IF_NOT_IN_USE;
|
|
|
|
INIT_LIST_HEAD(&hard_iface->list);
|
2011-02-10 07:33:51 -07:00
|
|
|
/* extra reference for return */
|
2011-02-18 05:33:20 -07:00
|
|
|
atomic_set(&hard_iface->refcount, 2);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
check_known_mac_addr(hard_iface->net_dev);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:19 -07:00
|
|
|
spin_lock(&hardif_list_lock);
|
2011-02-18 05:33:20 -07:00
|
|
|
list_add_tail_rcu(&hard_iface->list, &hardif_list);
|
2011-02-18 05:33:19 -07:00
|
|
|
spin_unlock(&hardif_list_lock);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
return hard_iface;
|
2010-12-13 04:19:28 -07:00
|
|
|
|
|
|
|
free_if:
|
2011-02-18 05:33:20 -07:00
|
|
|
kfree(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
release_dev:
|
|
|
|
dev_put(net_dev);
|
|
|
|
out:
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
static void hardif_remove_interface(struct hard_iface *hard_iface)
|
2010-12-13 04:19:28 -07:00
|
|
|
{
|
|
|
|
/* first deactivate interface */
|
2011-02-18 05:33:20 -07:00
|
|
|
if (hard_iface->if_status != IF_NOT_IN_USE)
|
|
|
|
hardif_disable_interface(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (hard_iface->if_status != IF_NOT_IN_USE)
|
2010-12-13 04:19:28 -07:00
|
|
|
return;
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface->if_status = IF_TO_BE_REMOVED;
|
|
|
|
sysfs_del_hardif(&hard_iface->hardif_obj);
|
|
|
|
hardif_free_ref(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
void hardif_remove_interfaces(void)
|
|
|
|
{
|
2011-02-18 05:33:20 -07:00
|
|
|
struct hard_iface *hard_iface, *hard_iface_tmp;
|
2010-12-13 04:19:28 -07:00
|
|
|
struct list_head if_queue;
|
|
|
|
|
|
|
|
INIT_LIST_HEAD(&if_queue);
|
|
|
|
|
2011-02-18 05:33:19 -07:00
|
|
|
spin_lock(&hardif_list_lock);
|
2011-02-18 05:33:20 -07:00
|
|
|
list_for_each_entry_safe(hard_iface, hard_iface_tmp,
|
|
|
|
&hardif_list, list) {
|
|
|
|
list_del_rcu(&hard_iface->list);
|
|
|
|
list_add_tail(&hard_iface->list, &if_queue);
|
2010-12-13 04:19:28 -07:00
|
|
|
}
|
2011-02-18 05:33:19 -07:00
|
|
|
spin_unlock(&hardif_list_lock);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
|
|
|
rtnl_lock();
|
2011-02-18 05:33:20 -07:00
|
|
|
list_for_each_entry_safe(hard_iface, hard_iface_tmp, &if_queue, list) {
|
|
|
|
hardif_remove_interface(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
}
|
|
|
|
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;
|
2011-02-18 05:33:20 -07:00
|
|
|
struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
|
2011-04-20 06:40:58 -07:00
|
|
|
struct hard_iface *primary_if = NULL;
|
2010-12-13 04:19:28 -07:00
|
|
|
struct bat_priv *bat_priv;
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (!hard_iface && event == NETDEV_REGISTER)
|
|
|
|
hard_iface = hardif_add_interface(net_dev);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (!hard_iface)
|
2010-12-13 04:19:28 -07:00
|
|
|
goto out;
|
|
|
|
|
|
|
|
switch (event) {
|
|
|
|
case NETDEV_UP:
|
2011-02-18 05:33:20 -07:00
|
|
|
hardif_activate_interface(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
case NETDEV_GOING_DOWN:
|
|
|
|
case NETDEV_DOWN:
|
2011-02-18 05:33:20 -07:00
|
|
|
hardif_deactivate_interface(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
case NETDEV_UNREGISTER:
|
2011-02-18 05:33:19 -07:00
|
|
|
spin_lock(&hardif_list_lock);
|
2011-02-18 05:33:20 -07:00
|
|
|
list_del_rcu(&hard_iface->list);
|
2011-02-18 05:33:19 -07:00
|
|
|
spin_unlock(&hardif_list_lock);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
hardif_remove_interface(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
case NETDEV_CHANGEMTU:
|
2011-02-18 05:33:20 -07:00
|
|
|
if (hard_iface->soft_iface)
|
|
|
|
update_min_mtu(hard_iface->soft_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
case NETDEV_CHANGEADDR:
|
2011-02-18 05:33:20 -07:00
|
|
|
if (hard_iface->if_status == IF_NOT_IN_USE)
|
2010-12-13 04:19:28 -07:00
|
|
|
goto hardif_put;
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
check_known_mac_addr(hard_iface->net_dev);
|
|
|
|
update_mac_addresses(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
bat_priv = netdev_priv(hard_iface->soft_iface);
|
2011-04-20 06:40:58 -07:00
|
|
|
primary_if = primary_if_get_selected(bat_priv);
|
|
|
|
if (!primary_if)
|
|
|
|
goto hardif_put;
|
|
|
|
|
|
|
|
if (hard_iface == primary_if)
|
|
|
|
primary_if_update_addr(bat_priv);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
};
|
|
|
|
|
|
|
|
hardif_put:
|
2011-02-18 05:33:20 -07:00
|
|
|
hardif_free_ref(hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
out:
|
2011-04-20 06:40:58 -07:00
|
|
|
if (primary_if)
|
|
|
|
hardif_free_ref(primary_if);
|
2010-12-13 04:19:28 -07:00
|
|
|
return NOTIFY_DONE;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* receive a packet with the batman ethertype coming on a hard
|
|
|
|
* interface */
|
2011-01-27 05:16:08 -07:00
|
|
|
static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
|
|
|
|
struct packet_type *ptype,
|
|
|
|
struct net_device *orig_dev)
|
2010-12-13 04:19:28 -07:00
|
|
|
{
|
|
|
|
struct bat_priv *bat_priv;
|
|
|
|
struct batman_packet *batman_packet;
|
2011-02-18 05:33:20 -07:00
|
|
|
struct hard_iface *hard_iface;
|
2010-12-13 04:19:28 -07:00
|
|
|
int ret;
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
hard_iface = container_of(ptype, struct hard_iface, batman_adv_ptype);
|
2010-12-13 04:19:28 -07:00
|
|
|
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;
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
if (!hard_iface->soft_iface)
|
2010-12-13 04:19:28 -07:00
|
|
|
goto err_free;
|
|
|
|
|
2011-02-18 05:33:20 -07:00
|
|
|
bat_priv = netdev_priv(hard_iface->soft_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
|
|
|
|
if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
|
|
|
|
goto err_free;
|
|
|
|
|
|
|
|
/* discard frames on not active interfaces */
|
2011-02-18 05:33:20 -07:00
|
|
|
if (hard_iface->if_status != IF_ACTIVE)
|
2010-12-13 04:19:28 -07:00
|
|
|
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:
|
2011-02-18 05:33:20 -07:00
|
|
|
ret = recv_bat_packet(skb, hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* batman icmp packet */
|
|
|
|
case BAT_ICMP:
|
2011-02-18 05:33:20 -07:00
|
|
|
ret = recv_icmp_packet(skb, hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* unicast packet */
|
|
|
|
case BAT_UNICAST:
|
2011-02-18 05:33:20 -07:00
|
|
|
ret = recv_unicast_packet(skb, hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* fragmented unicast packet */
|
|
|
|
case BAT_UNICAST_FRAG:
|
2011-02-18 05:33:20 -07:00
|
|
|
ret = recv_ucast_frag_packet(skb, hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* broadcast packet */
|
|
|
|
case BAT_BCAST:
|
2011-02-18 05:33:20 -07:00
|
|
|
ret = recv_bcast_packet(skb, hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* vis packet */
|
|
|
|
case BAT_VIS:
|
2011-02-18 05:33:20 -07:00
|
|
|
ret = recv_vis_packet(skb, hard_iface);
|
2010-12-13 04:19:28 -07:00
|
|
|
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,
|
|
|
|
};
|