summaryrefslogtreecommitdiff
path: root/drivers/net/macvlan.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/macvlan.c')
-rw-r--r--drivers/net/macvlan.c33
1 files changed, 32 insertions, 1 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 93f0ba25c808..6ed577b065df 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -38,6 +38,7 @@ struct macvlan_port {
struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
struct list_head vlans;
struct rcu_head rcu;
+ bool passthru;
};
#define macvlan_port_get_rcu(dev) \
@@ -169,6 +170,7 @@ static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb)
macvlan_broadcast(skb, port, NULL,
MACVLAN_MODE_PRIVATE |
MACVLAN_MODE_VEPA |
+ MACVLAN_MODE_PASSTHRU|
MACVLAN_MODE_BRIDGE);
else if (src->mode == MACVLAN_MODE_VEPA)
/* flood to everyone except source */
@@ -185,7 +187,10 @@ static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb)
return skb;
}
- vlan = macvlan_hash_lookup(port, eth->h_dest);
+ if (port->passthru)
+ vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
+ else
+ vlan = macvlan_hash_lookup(port, eth->h_dest);
if (vlan == NULL)
return skb;
@@ -288,6 +293,11 @@ static int macvlan_open(struct net_device *dev)
struct net_device *lowerdev = vlan->lowerdev;
int err;
+ if (vlan->port->passthru) {
+ dev_set_promiscuity(lowerdev, 1);
+ goto hash_add;
+ }
+
err = -EBUSY;
if (macvlan_addr_busy(vlan->port, dev->dev_addr))
goto out;
@@ -300,6 +310,8 @@ static int macvlan_open(struct net_device *dev)
if (err < 0)
goto del_unicast;
}
+
+hash_add:
macvlan_hash_add(vlan);
return 0;
@@ -314,12 +326,18 @@ static int macvlan_stop(struct net_device *dev)
struct macvlan_dev *vlan = netdev_priv(dev);
struct net_device *lowerdev = vlan->lowerdev;
+ if (vlan->port->passthru) {
+ dev_set_promiscuity(lowerdev, -1);
+ goto hash_del;
+ }
+
dev_mc_unsync(lowerdev, dev);
if (dev->flags & IFF_ALLMULTI)
dev_set_allmulti(lowerdev, -1);
dev_uc_del(lowerdev, dev->dev_addr);
+hash_del:
macvlan_hash_del(vlan);
return 0;
}
@@ -559,6 +577,7 @@ static int macvlan_port_create(struct net_device *dev)
if (port == NULL)
return -ENOMEM;
+ port->passthru = false;
port->dev = dev;
INIT_LIST_HEAD(&port->vlans);
for (i = 0; i < MACVLAN_HASH_SIZE; i++)
@@ -603,6 +622,7 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
case MACVLAN_MODE_PRIVATE:
case MACVLAN_MODE_VEPA:
case MACVLAN_MODE_BRIDGE:
+ case MACVLAN_MODE_PASSTHRU:
break;
default:
return -EINVAL;
@@ -652,6 +672,10 @@ int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
}
port = macvlan_port_get(lowerdev);
+ /* Only 1 macvlan device can be created in passthru mode */
+ if (port->passthru)
+ return -EINVAL;
+
vlan->lowerdev = lowerdev;
vlan->dev = dev;
vlan->port = port;
@@ -662,6 +686,13 @@ int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
if (data && data[IFLA_MACVLAN_MODE])
vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
+ if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
+ if (!list_empty(&port->vlans))
+ return -EINVAL;
+ port->passthru = true;
+ memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
+ }
+
err = register_netdevice(dev);
if (err < 0)
goto destroy_port;