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authorEric W. Biederman <ebiederm@xmission.com>2009-02-25 19:47:29 +0000
committerDavid S. Miller <davem@davemloft.net>2009-03-01 20:44:21 -0800
commit2cf48a10aa1f45c7b1f1117a829f2f8a1a1309e2 (patch)
tree4b467e81ebb7aa6c6789791115426ab5837b701f
parentcac477e8f1038c41b6f29d3161ce351462ef3df7 (diff)
veth: Fix carrier detect
The current implementation of carrier detect in veth is broken. It reports the link is down until both sides of the veth pair are administatively up and then forever after it reports link up. So fix veth so that it only reports link up when both interfaces of the pair are administratively up. Signed-off-by: Eric Biederman <ebiederm@aristanetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/veth.c51
1 files changed, 11 insertions, 40 deletions
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 108bbbeacfb6..124fe75b8a8a 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -239,6 +239,16 @@ static int veth_open(struct net_device *dev)
return 0;
}
+static int veth_close(struct net_device *dev)
+{
+ struct veth_priv *priv = netdev_priv(dev);
+
+ netif_carrier_off(dev);
+ netif_carrier_off(priv->peer);
+
+ return 0;
+}
+
static int veth_dev_init(struct net_device *dev)
{
struct veth_net_stats *stats;
@@ -265,6 +275,7 @@ static void veth_dev_free(struct net_device *dev)
static const struct net_device_ops veth_netdev_ops = {
.ndo_init = veth_dev_init,
.ndo_open = veth_open,
+ .ndo_stop = veth_close,
.ndo_start_xmit = veth_xmit,
.ndo_get_stats = veth_get_stats,
.ndo_set_mac_address = eth_mac_addr,
@@ -280,44 +291,6 @@ static void veth_setup(struct net_device *dev)
dev->destructor = veth_dev_free;
}
-static void veth_change_state(struct net_device *dev)
-{
- struct net_device *peer;
- struct veth_priv *priv;
-
- priv = netdev_priv(dev);
- peer = priv->peer;
-
- if (netif_carrier_ok(peer)) {
- if (!netif_carrier_ok(dev))
- netif_carrier_on(dev);
- } else {
- if (netif_carrier_ok(dev))
- netif_carrier_off(dev);
- }
-}
-
-static int veth_device_event(struct notifier_block *unused,
- unsigned long event, void *ptr)
-{
- struct net_device *dev = ptr;
-
- if (dev->netdev_ops->ndo_open != veth_open)
- goto out;
-
- switch (event) {
- case NETDEV_CHANGE:
- veth_change_state(dev);
- break;
- }
-out:
- return NOTIFY_DONE;
-}
-
-static struct notifier_block veth_notifier_block __read_mostly = {
- .notifier_call = veth_device_event,
-};
-
/*
* netlink interface
*/
@@ -468,14 +441,12 @@ static struct rtnl_link_ops veth_link_ops = {
static __init int veth_init(void)
{
- register_netdevice_notifier(&veth_notifier_block);
return rtnl_link_register(&veth_link_ops);
}
static __exit void veth_exit(void)
{
rtnl_link_unregister(&veth_link_ops);
- unregister_netdevice_notifier(&veth_notifier_block);
}
module_init(veth_init);