netdev: Add netdev->addr_list_lock protection.

[linux-2.6] / net / core / dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index a29a359b15d1657acf898a26da74396387423470..ef1502d71f25cb4c5e30bd769ced1dec760212c3 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2068,6 +2068,33 @@ out:
 }
 #endif
 
+/*
+ *     netif_nit_deliver - deliver received packets to network taps
+ *     @skb: buffer
+ *
+ *     This function is used to deliver incoming packets to network
+ *     taps. It should be used when the normal netif_receive_skb path
+ *     is bypassed, for example because of VLAN acceleration.
+ */
+void netif_nit_deliver(struct sk_buff *skb)
+{
+       struct packet_type *ptype;
+
+       if (list_empty(&ptype_all))
+               return;
+
+       skb_reset_network_header(skb);
+       skb_reset_transport_header(skb);
+       skb->mac_len = skb->network_header - skb->mac_header;
+
+       rcu_read_lock();
+       list_for_each_entry_rcu(ptype, &ptype_all, list) {
+               if (!ptype->dev || ptype->dev == skb->dev)
+                       deliver_skb(skb, ptype, skb->dev);
+       }
+       rcu_read_unlock();
+}
+
 /**
  *     netif_receive_skb - process receive buffer from network
  *     @skb: buffer to process
@@ -2955,7 +2982,9 @@ void __dev_set_rx_mode(struct net_device *dev)
 void dev_set_rx_mode(struct net_device *dev)
 {
        netif_tx_lock_bh(dev);
+       netif_addr_lock(dev);
        __dev_set_rx_mode(dev);
+       netif_addr_unlock(dev);
        netif_tx_unlock_bh(dev);
 }
 
@@ -3035,9 +3064,11 @@ int dev_unicast_delete(struct net_device *dev, void *addr, int alen)
        ASSERT_RTNL();
 
        netif_tx_lock_bh(dev);
+       netif_addr_lock(dev);
        err = __dev_addr_delete(&dev->uc_list, &dev->uc_count, addr, alen, 0);
        if (!err)
                __dev_set_rx_mode(dev);
+       netif_addr_unlock(dev);
        netif_tx_unlock_bh(dev);
        return err;
 }
@@ -3061,9 +3092,11 @@ int dev_unicast_add(struct net_device *dev, void *addr, int alen)
        ASSERT_RTNL();
 
        netif_tx_lock_bh(dev);
+       netif_addr_lock(dev);
        err = __dev_addr_add(&dev->uc_list, &dev->uc_count, addr, alen, 0);
        if (!err)
                __dev_set_rx_mode(dev);
+       netif_addr_unlock(dev);
        netif_tx_unlock_bh(dev);
        return err;
 }
@@ -3132,10 +3165,12 @@ int dev_unicast_sync(struct net_device *to, struct net_device *from)
        int err = 0;
 
        netif_tx_lock_bh(to);
+       netif_addr_lock(to);
        err = __dev_addr_sync(&to->uc_list, &to->uc_count,
                              &from->uc_list, &from->uc_count);
        if (!err)
                __dev_set_rx_mode(to);
+       netif_addr_unlock(to);
        netif_tx_unlock_bh(to);
        return err;
 }
@@ -3153,13 +3188,17 @@ EXPORT_SYMBOL(dev_unicast_sync);
 void dev_unicast_unsync(struct net_device *to, struct net_device *from)
 {
        netif_tx_lock_bh(from);
+       netif_addr_lock(from);
        netif_tx_lock_bh(to);
+       netif_addr_lock(to);
 
        __dev_addr_unsync(&to->uc_list, &to->uc_count,
                          &from->uc_list, &from->uc_count);
        __dev_set_rx_mode(to);
 
+       netif_addr_unlock(to);
        netif_tx_unlock_bh(to);
+       netif_addr_unlock(from);
        netif_tx_unlock_bh(from);
 }
 EXPORT_SYMBOL(dev_unicast_unsync);
@@ -3181,6 +3220,7 @@ static void __dev_addr_discard(struct dev_addr_list **list)
 static void dev_addr_discard(struct net_device *dev)
 {
        netif_tx_lock_bh(dev);
+       netif_addr_lock(dev);
 
        __dev_addr_discard(&dev->uc_list);
        dev->uc_count = 0;
@@ -3188,6 +3228,7 @@ static void dev_addr_discard(struct net_device *dev)
        __dev_addr_discard(&dev->mc_list);
        dev->mc_count = 0;
 
+       netif_addr_unlock(dev);
        netif_tx_unlock_bh(dev);
 }
 
@@ -3809,6 +3850,7 @@ int register_netdevice(struct net_device *dev)
        BUG_ON(!dev_net(dev));
        net = dev_net(dev);
 
+       spin_lock_init(&dev->addr_list_lock);
        netdev_init_queue_locks(dev);
 
        dev->iflink = -1;