/*
- * Copyright (C) 2007-2009 B.A.T.M.A.N. contributors:
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
*
* Marek Lindner, Simon Wunderlich
*
#include "send.h"
#include "translation-table.h"
#include "routing.h"
+#include "bat_sysfs.h"
+#include "originator.h"
#include "hash.h"
-#define MIN(x, y) ((x) < (y) ? (x) : (y))
-
-static char avail_ifs;
-static char active_ifs;
+#include <linux/if_arp.h>
-static void hardif_free_interface(struct rcu_head *rcu);
+#define MIN(x, y) ((x) < (y) ? (x) : (y))
-static struct batman_if *get_batman_if_by_name(char *name)
+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 (strncmp(batman_if->dev, name, IFNAMSIZ) == 0)
+ if (batman_if->net_dev == net_dev)
goto out;
}
return batman_if;
}
-int hardif_min_mtu(void)
+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(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;
+ /* TODO: should check interfaces belonging to bat_priv */
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);
+ if (batman_if->if_status == IF_ACTIVE)
+ goto out;
}
+
+ batman_if = NULL;
+
+out:
rcu_read_unlock();
+ return batman_if;
+}
- return min_mtu;
+static void set_primary_if(struct bat_priv *bat_priv,
+ struct batman_if *batman_if)
+{
+ struct batman_packet *batman_packet;
+
+ bat_priv->primary_if = batman_if;
+
+ if (!bat_priv->primary_if)
+ return;
+
+ set_main_if_addr(batman_if->net_dev->dev_addr);
+
+ batman_packet = (struct batman_packet *)(batman_if->packet_buff);
+ batman_packet->flags = 0;
+ batman_packet->ttl = TTL;
+
+ /***
+ * hacky trick to make sure that we send the HNA information via
+ * our new primary interface
+ */
+ atomic_set(&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)
+{
+ 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);
}
static void check_known_mac_addr(uint8_t *addr)
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))
+ if ((batman_if->if_status != IF_ACTIVE) &&
+ (batman_if->if_status != 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");
+ 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();
+}
+
+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_status == IF_ACTIVE) ||
+ (batman_if->if_status == IF_TO_BE_ACTIVATED))
+ min_mtu = MIN(batman_if->net_dev->mtu - BAT_HEADER_LEN,
+ min_mtu);
}
rcu_read_unlock();
+
+ return min_mtu;
}
/* adjusts the MTU if a new interface with a smaller MTU appeared. */
soft_device->mtu = min_mtu;
}
-/* checks if the interface is up. (returns 1 if it is) */
-static int hardif_is_interface_up(char *dev)
+static void hardif_activate_interface(struct bat_priv *bat_priv,
+ struct batman_if *batman_if)
{
- struct net_device *net_dev;
+ if (batman_if->if_status != IF_INACTIVE)
+ return;
+
+ dev_hold(batman_if->net_dev);
+
+ update_mac_addresses(batman_if);
+ batman_if->if_status = IF_TO_BE_ACTIVATED;
/**
- * 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 !
+ * 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);
- 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;
+ printk(KERN_INFO "batman-adv:Interface activated: %s\n",
+ batman_if->dev);
- if (!(net_dev->flags & IFF_UP))
- goto failure;
+ if (atomic_read(&module_state) == MODULE_INACTIVE)
+ activate_module();
- dev_put(net_dev);
- return 1;
-
-failure:
- dev_put(net_dev);
-end:
- return 0;
+ update_min_mtu();
+ return;
}
-/* deactivates the interface. */
-void hardif_deactivate_interface(struct batman_if *batman_if)
+static void hardif_deactivate_interface(struct batman_if *batman_if)
{
- if (batman_if->if_active != IF_ACTIVE)
+ if ((batman_if->if_status != IF_ACTIVE) &&
+ (batman_if->if_status != IF_TO_BE_ACTIVATED))
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);
+ dev_put(batman_if->net_dev);
- batman_if->if_active = IF_INACTIVE;
- active_ifs--;
+ batman_if->if_status = IF_INACTIVE;
printk(KERN_INFO "batman-adv:Interface deactivated: %s\n",
- batman_if->dev);
+ batman_if->dev);
+
+ update_min_mtu();
}
-/* (re)activate given interface. */
-static void hardif_activate_interface(struct batman_if *batman_if)
+int hardif_enable_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;
+ /* FIXME: each batman_if will be attached to a softif */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
+ struct batman_packet *batman_packet;
- check_known_mac_addr(batman_if->net_dev->dev_addr);
+ if (batman_if->if_status != IF_NOT_IN_USE)
+ goto out;
- addr_to_string(batman_if->addr_str, batman_if->net_dev->dev_addr);
+ batman_if->packet_len = BAT_PACKET_LEN;
+ batman_if->packet_buff = kmalloc(batman_if->packet_len, GFP_ATOMIC);
- 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);
+ if (!batman_if->packet_buff) {
+ printk(KERN_ERR "batman-adv:"
+ "Can't add interface packet (%s): out of memory\n",
+ batman_if->dev);
+ goto err;
+ }
- batman_if->if_active = IF_TO_BE_ACTIVATED;
- active_ifs++;
+ 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;
- /* 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);
+ 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);
- printk(KERN_INFO "batman-adv:Interface activated: %s\n",
- batman_if->dev);
+ atomic_set(&batman_if->seqno, 1);
+ printk(KERN_INFO "batman-adv:Adding interface: %s\n", batman_if->dev);
- return;
+ if (hardif_is_iface_up(batman_if))
+ hardif_activate_interface(bat_priv, batman_if);
+ else
+ printk(KERN_ERR "batman-adv:"
+ "Not using interface %s "
+ "(retrying later): interface not active\n",
+ batman_if->dev);
-dev_err:
- batman_if->net_dev = NULL;
-}
+ /* begin scheduling originator messages on that interface */
+ schedule_own_packet(batman_if);
-static void hardif_free_interface(struct rcu_head *rcu)
-{
- struct batman_if *batman_if = container_of(rcu, struct batman_if, rcu);
+out:
+ return 0;
- kfree(batman_if->packet_buff);
- kfree(batman_if->dev);
- kfree(batman_if);
+err:
+ return -ENOMEM;
}
-/**
- * called by
- * - echo '' > /proc/.../interfaces
- * - modprobe -r batman-adv-core
- */
-/* removes and frees all interfaces */
-void hardif_remove_interfaces(void)
+void hardif_disable_interface(struct batman_if *batman_if)
{
- 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) {
+ /* FIXME: each batman_if will be attached to a softif */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
- 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;
+ if (batman_if->if_status == IF_ACTIVE)
+ hardif_deactivate_interface(batman_if);
- 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;
- }
+ if (batman_if->if_status != IF_INACTIVE)
+ return;
- 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;
+ printk(KERN_INFO "batman-adv:Removing interface: %s\n", batman_if->dev);
+ bat_priv->num_ifaces--;
+ orig_hash_del_if(batman_if, bat_priv->num_ifaces);
- 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;
- }
+ if (batman_if == bat_priv->primary_if)
+ set_primary_if(bat_priv, get_active_batman_if());
- 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;
+ kfree(batman_if->packet_buff);
+ batman_if->packet_buff = NULL;
+ batman_if->if_status = IF_NOT_IN_USE;
- return 0;
+ if ((atomic_read(&module_state) == MODULE_ACTIVE) &&
+ (bat_priv->num_ifaces == 0))
+ deactivate_module();
}
-
-/* adds an interface the interface list and activate it, if possible */
-int hardif_add_interface(char *dev, int if_num)
+static struct batman_if *hardif_add_interface(struct net_device *net_dev)
{
struct batman_if *batman_if;
- struct batman_packet *batman_packet;
- struct orig_node *orig_node;
- unsigned long flags;
- HASHIT(hashit);
+ int ret;
- batman_if = kmalloc(sizeof(struct batman_if), GFP_KERNEL);
+ ret = is_valid_iface(net_dev);
+ if (ret != 1)
+ goto out;
+ batman_if = kmalloc(sizeof(struct batman_if), GFP_ATOMIC);
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);
+ printk(KERN_ERR "batman-adv:"
+ "Can't add interface (%s): out of memory\n",
+ net_dev->name);
goto out;
}
- batman_if->if_num = if_num;
- batman_if->dev = dev;
- batman_if->if_active = IF_INACTIVE;
- INIT_RCU_HEAD(&batman_if->rcu);
+ batman_if->dev = kstrdup(net_dev->name, GFP_ATOMIC);
+ if (!batman_if->dev)
+ goto free_if;
- printk(KERN_INFO "batman-adv:Adding interface: %s\n", dev);
- avail_ifs++;
+ ret = sysfs_add_hardif(&batman_if->hardif_obj, net_dev);
+ if (ret)
+ goto free_dev;
+ batman_if->if_num = -1;
+ batman_if->net_dev = net_dev;
+ batman_if->if_status = IF_NOT_IN_USE;
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);
+ check_known_mac_addr(batman_if->net_dev->dev_addr);
+ list_add_tail_rcu(&batman_if->list, &if_list);
+ return batman_if;
- /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
- * if_num */
- spin_lock_irqsave(&orig_hash_lock, flags);
+free_dev:
+ kfree(batman_if->dev);
+free_if:
+ kfree(batman_if);
+out:
+ return NULL;
+}
- 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;
- }
- }
+static void hardif_free_interface(struct rcu_head *rcu)
+{
+ struct batman_if *batman_if = container_of(rcu, struct batman_if, rcu);
- spin_unlock_irqrestore(&orig_hash_lock, flags);
+ /* delete all references to this batman_if */
+ purge_orig(NULL);
+ purge_outstanding_packets(batman_if);
- 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);
+ kfree(batman_if->dev);
+ kfree(batman_if);
+}
- list_add_tail_rcu(&batman_if->list, &if_list);
+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);
- /* begin sending originator messages on that interface */
- schedule_own_packet(batman_if);
- return 1;
+ if (batman_if->if_status != IF_NOT_IN_USE)
+ return;
-out:
- kfree(batman_if->packet_buff);
- kfree(batman_if);
- kfree(dev);
- return -1;
+ batman_if->if_status = IF_TO_BE_REMOVED;
+ list_del_rcu(&batman_if->list);
+ sysfs_del_hardif(&batman_if->hardif_obj);
+ call_rcu(&batman_if->rcu, hardif_free_interface);
}
-char hardif_get_active_if_num(void)
+void hardif_remove_interfaces(void)
{
- return active_ifs;
+ struct batman_if *batman_if, *batman_if_tmp;
+
+ list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list)
+ hardif_remove_interface(batman_if);
}
static int hard_if_event(struct notifier_block *this,
- unsigned long event, void *ptr)
+ 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);
+ struct net_device *net_dev = (struct net_device *)ptr;
+ struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
+ /* FIXME: each batman_if will be attached to a softif */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
+
+ if (!batman_if)
+ batman_if = hardif_add_interface(net_dev);
if (!batman_if)
goto out;
switch (event) {
+ case NETDEV_REGISTER:
+ break;
+ case NETDEV_UP:
+ hardif_activate_interface(bat_priv, batman_if);
+ break;
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();
- }
+ case NETDEV_UNREGISTER:
+ hardif_remove_interface(batman_if);
+ break;
+ case NETDEV_CHANGENAME:
+ break;
+ case NETDEV_CHANGEADDR:
+ check_known_mac_addr(batman_if->net_dev->dev_addr);
+ update_mac_addresses(batman_if);
+ if (batman_if == bat_priv->primary_if)
+ set_primary_if(bat_priv, batman_if);
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,
|| !skb_mac_header(skb)))
goto err_free;
- batman_if = find_batman_if(skb->dev);
+ batman_if = get_batman_if_by_netdev(skb->dev);
if (!batman_if)
goto err_free;
/* discard frames on not active interfaces */
- if (batman_if->if_active != IF_ACTIVE)
+ if (batman_if->if_status != IF_ACTIVE)
goto err_free;
stats = (struct net_device_stats *)dev_get_stats(skb->dev);
projects / mirror_ubuntu-bionic-kernel.git / blobdiff