[VLAN]: Fix MAC address handling
The VLAN MAC address handling is broken in multiple ways. When the address
differs when setting it, the real device is put in promiscous mode twice,
but never taken out again. Additionally it doesn't resync when the real
device's address is changed and needlessly puts it in promiscous mode when
the vlan device is still down.
Fix by moving address handling to vlan_dev_open/vlan_dev_stop and properly
deal with address changes in the device notifier. Also switch to
dev_unicast_add (which needs the exact same handling).
Since the set_mac_address handler is identical to the generic ethernet one
with these changes, kill it and use ether_setup().
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index e7583ee..b463ba4 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -345,12 +345,8 @@
(1<<__LINK_STATE_DORMANT))) |
(1<<__LINK_STATE_PRESENT);
- /* TODO: maybe just assign it to be ETHERNET? */
- dev->type = real_dev->type;
-
memcpy(dev->broadcast, real_dev->broadcast, real_dev->addr_len);
memcpy(dev->dev_addr, real_dev->dev_addr, real_dev->addr_len);
- dev->addr_len = real_dev->addr_len;
if (real_dev->features & NETIF_F_HW_VLAN_TX) {
dev->hard_header = real_dev->hard_header;
@@ -364,6 +360,7 @@
dev->rebuild_header = vlan_dev_rebuild_header;
}
dev->hard_header_parse = real_dev->hard_header_parse;
+ dev->hard_header_cache = NULL;
lockdep_set_class(&dev->_xmit_lock, &vlan_netdev_xmit_lock_key);
return 0;
@@ -373,6 +370,8 @@
{
SET_MODULE_OWNER(new_dev);
+ ether_setup(new_dev);
+
/* new_dev->ifindex = 0; it will be set when added to
* the global list.
* iflink is set as well.
@@ -392,7 +391,6 @@
new_dev->init = vlan_dev_init;
new_dev->open = vlan_dev_open;
new_dev->stop = vlan_dev_stop;
- new_dev->set_mac_address = vlan_dev_set_mac_address;
new_dev->set_multicast_list = vlan_dev_set_multicast_list;
new_dev->destructor = free_netdev;
new_dev->do_ioctl = vlan_dev_ioctl;
@@ -592,6 +590,30 @@
return err;
}
+static void vlan_sync_address(struct net_device *dev,
+ struct net_device *vlandev)
+{
+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(vlandev);
+
+ /* May be called without an actual change */
+ if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
+ return;
+
+ /* vlan address was different from the old address and is equal to
+ * the new address */
+ if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
+ !compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
+ dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN);
+
+ /* vlan address was equal to the old address and is different from
+ * the new address */
+ if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
+ compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
+ dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN);
+
+ memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
+}
+
static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev = ptr;
@@ -618,6 +640,17 @@
}
break;
+ case NETDEV_CHANGEADDR:
+ /* Adjust unicast filters on underlying device */
+ for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
+ vlandev = vlan_group_get_device(grp, i);
+ if (!vlandev)
+ continue;
+
+ vlan_sync_address(dev, vlandev);
+ }
+ break;
+
case NETDEV_DOWN:
/* Put all VLANs for this dev in the down state too. */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index fe6bb0f..62ce1c5 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -58,7 +58,6 @@
int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev);
int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, struct net_device *dev);
int vlan_dev_change_mtu(struct net_device *dev, int new_mtu);
-int vlan_dev_set_mac_address(struct net_device *dev, void* addr);
int vlan_dev_open(struct net_device* dev);
int vlan_dev_stop(struct net_device* dev);
int vlan_dev_ioctl(struct net_device* dev, struct ifreq *ifr, int cmd);
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 95afe38..d4a62d1 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -612,44 +612,6 @@
*result = VLAN_DEV_INFO(dev)->vlan_id;
}
-int vlan_dev_set_mac_address(struct net_device *dev, void *addr_struct_p)
-{
- struct sockaddr *addr = (struct sockaddr *)(addr_struct_p);
- int i;
-
- if (netif_running(dev))
- return -EBUSY;
-
- memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
-
- printk("%s: Setting MAC address to ", dev->name);
- for (i = 0; i < 6; i++)
- printk(" %2.2x", dev->dev_addr[i]);
- printk(".\n");
-
- if (memcmp(VLAN_DEV_INFO(dev)->real_dev->dev_addr,
- dev->dev_addr,
- dev->addr_len) != 0) {
- if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_PROMISC)) {
- int flgs = VLAN_DEV_INFO(dev)->real_dev->flags;
-
- /* Increment our in-use promiscuity counter */
- dev_set_promiscuity(VLAN_DEV_INFO(dev)->real_dev, 1);
-
- /* Make PROMISC visible to the user. */
- flgs |= IFF_PROMISC;
- printk("VLAN (%s): Setting underlying device (%s) to promiscious mode.\n",
- dev->name, VLAN_DEV_INFO(dev)->real_dev->name);
- dev_change_flags(VLAN_DEV_INFO(dev)->real_dev, flgs);
- }
- } else {
- printk("VLAN (%s): Underlying device (%s) has same MAC, not checking promiscious mode.\n",
- dev->name, VLAN_DEV_INFO(dev)->real_dev->name);
- }
-
- return 0;
-}
-
static inline int vlan_dmi_equals(struct dev_mc_list *dmi1,
struct dev_mc_list *dmi2)
{
@@ -736,15 +698,32 @@
int vlan_dev_open(struct net_device *dev)
{
- if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_UP))
+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
+ struct net_device *real_dev = vlan->real_dev;
+ int err;
+
+ if (!(real_dev->flags & IFF_UP))
return -ENETDOWN;
+ if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {
+ err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN);
+ if (err < 0)
+ return err;
+ }
+ memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
+
return 0;
}
int vlan_dev_stop(struct net_device *dev)
{
+ struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev;
+
vlan_flush_mc_list(dev);
+
+ if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
+ dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len);
+
return 0;
}
