+ if (dev->flags ^ old_flags) {
+ if (dev->change_rx_flags)
+ dev->change_rx_flags(dev, IFF_ALLMULTI);
+ dev_set_rx_mode(dev);
+ }
+}
+
+/*
+ * Upload unicast and multicast address lists to device and
+ * configure RX filtering. When the device doesn't support unicast
+ * filtering it is put in promiscuous mode while unicast addresses
+ * are present.
+ */
+void __dev_set_rx_mode(struct net_device *dev)
+{
+ /* dev_open will call this function so the list will stay sane. */
+ if (!(dev->flags&IFF_UP))
+ return;
+
+ if (!netif_device_present(dev))
+ return;
+
+ if (dev->set_rx_mode)
+ dev->set_rx_mode(dev);
+ else {
+ /* Unicast addresses changes may only happen under the rtnl,
+ * therefore calling __dev_set_promiscuity here is safe.
+ */
+ if (dev->uc_count > 0 && !dev->uc_promisc) {
+ __dev_set_promiscuity(dev, 1);
+ dev->uc_promisc = 1;
+ } else if (dev->uc_count == 0 && dev->uc_promisc) {
+ __dev_set_promiscuity(dev, -1);
+ dev->uc_promisc = 0;
+ }
+
+ if (dev->set_multicast_list)
+ dev->set_multicast_list(dev);
+ }
+}
+
+void dev_set_rx_mode(struct net_device *dev)
+{
+ netif_tx_lock_bh(dev);
+ __dev_set_rx_mode(dev);
+ netif_tx_unlock_bh(dev);
+}
+
+int __dev_addr_delete(struct dev_addr_list **list, int *count,
+ void *addr, int alen, int glbl)
+{
+ struct dev_addr_list *da;
+
+ for (; (da = *list) != NULL; list = &da->next) {
+ if (memcmp(da->da_addr, addr, da->da_addrlen) == 0 &&
+ alen == da->da_addrlen) {
+ if (glbl) {
+ int old_glbl = da->da_gusers;
+ da->da_gusers = 0;
+ if (old_glbl == 0)
+ break;
+ }
+ if (--da->da_users)
+ return 0;
+
+ *list = da->next;
+ kfree(da);
+ (*count)--;
+ return 0;
+ }
+ }
+ return -ENOENT;
+}
+
+int __dev_addr_add(struct dev_addr_list **list, int *count,
+ void *addr, int alen, int glbl)
+{
+ struct dev_addr_list *da;
+
+ for (da = *list; da != NULL; da = da->next) {
+ if (memcmp(da->da_addr, addr, da->da_addrlen) == 0 &&
+ da->da_addrlen == alen) {
+ if (glbl) {
+ int old_glbl = da->da_gusers;
+ da->da_gusers = 1;
+ if (old_glbl)
+ return 0;
+ }
+ da->da_users++;
+ return 0;
+ }
+ }
+
+ da = kmalloc(sizeof(*da), GFP_ATOMIC);
+ if (da == NULL)
+ return -ENOMEM;
+ memcpy(da->da_addr, addr, alen);
+ da->da_addrlen = alen;
+ da->da_users = 1;
+ da->da_gusers = glbl ? 1 : 0;
+ da->next = *list;
+ *list = da;
+ (*count)++;
+ return 0;
+}
+
+/**
+ * dev_unicast_delete - Release secondary unicast address.
+ * @dev: device
+ * @addr: address to delete
+ * @alen: length of @addr
+ *
+ * Release reference to a secondary unicast address and remove it
+ * from the device if the reference count drops to zero.
+ *
+ * The caller must hold the rtnl_mutex.
+ */
+int dev_unicast_delete(struct net_device *dev, void *addr, int alen)
+{
+ int err;
+
+ ASSERT_RTNL();
+
+ netif_tx_lock_bh(dev);
+ err = __dev_addr_delete(&dev->uc_list, &dev->uc_count, addr, alen, 0);
+ if (!err)
+ __dev_set_rx_mode(dev);
+ netif_tx_unlock_bh(dev);
+ return err;
+}
+EXPORT_SYMBOL(dev_unicast_delete);
+
+/**
+ * dev_unicast_add - add a secondary unicast address
+ * @dev: device
+ * @addr: address to delete
+ * @alen: length of @addr
+ *
+ * Add a secondary unicast address to the device or increase
+ * the reference count if it already exists.
+ *
+ * The caller must hold the rtnl_mutex.
+ */
+int dev_unicast_add(struct net_device *dev, void *addr, int alen)
+{
+ int err;
+
+ ASSERT_RTNL();
+
+ netif_tx_lock_bh(dev);
+ err = __dev_addr_add(&dev->uc_list, &dev->uc_count, addr, alen, 0);
+ if (!err)
+ __dev_set_rx_mode(dev);
+ netif_tx_unlock_bh(dev);
+ return err;
+}
+EXPORT_SYMBOL(dev_unicast_add);
+
+static void __dev_addr_discard(struct dev_addr_list **list)
+{
+ struct dev_addr_list *tmp;
+
+ while (*list != NULL) {
+ tmp = *list;
+ *list = tmp->next;
+ if (tmp->da_users > tmp->da_gusers)
+ printk("__dev_addr_discard: address leakage! "
+ "da_users=%d\n", tmp->da_users);
+ kfree(tmp);
+ }
+}
+
+static void dev_addr_discard(struct net_device *dev)
+{
+ netif_tx_lock_bh(dev);
+
+ __dev_addr_discard(&dev->uc_list);
+ dev->uc_count = 0;
+
+ __dev_addr_discard(&dev->mc_list);
+ dev->mc_count = 0;
+
+ netif_tx_unlock_bh(dev);