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macvlan: use rx_handler_data pointer to store macvlan_port pointer V2 

Register macvlan_port pointer as rx_handler data pointer. As macvlan_port is
removed from struct net_device, another netdev priv_flag is added to indicate
the device serves as a macvlan port.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2010-06-15 03:27:57 +00:00 committed by David S. Miller
parent 93e2c32b5c
commit a35e2c1b6d
3 changed files with 17 additions and 14 deletions
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28
drivers/net/macvlan.c
View File

@ -40,6 +40,11 @@ struct macvlan_port {
struct rcu_head rcu;
};
#define macvlan_port_get_rcu(dev) \
((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
#define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
const unsigned char *addr)
{
@ -155,7 +160,7 @@ static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb)
struct net_device *dev;
unsigned int len;
port = rcu_dereference(skb->dev->macvlan_port);
port = macvlan_port_get_rcu(skb->dev);
if (is_multicast_ether_addr(eth->h_dest)) {
src = macvlan_hash_lookup(port, eth->h_source);
if (!src)
@ -530,14 +535,12 @@ static int macvlan_port_create(struct net_device *dev)
INIT_LIST_HEAD(&port->vlans);
for (i = 0; i < MACVLAN_HASH_SIZE; i++)
INIT_HLIST_HEAD(&port->vlan_hash[i]);
rcu_assign_pointer(dev->macvlan_port, port);
err = netdev_rx_handler_register(dev, macvlan_handle_frame, NULL);
if (err) {
rcu_assign_pointer(dev->macvlan_port, NULL);
err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
if (err)
kfree(port);
}
dev->priv_flags |= IFF_MACVLAN_PORT;
return err;
}
@ -551,10 +554,10 @@ static void macvlan_port_rcu_free(struct rcu_head *head)
static void macvlan_port_destroy(struct net_device *dev)
{
struct macvlan_port *port = dev->macvlan_port;
struct macvlan_port *port = macvlan_port_get(dev);
dev->priv_flags &= ~IFF_MACVLAN_PORT;
netdev_rx_handler_unregister(dev);
rcu_assign_pointer(dev->macvlan_port, NULL);
call_rcu(&port->rcu, macvlan_port_rcu_free);
}
@ -633,12 +636,12 @@ int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
if (!tb[IFLA_ADDRESS])
random_ether_addr(dev->dev_addr);
if (lowerdev->macvlan_port == NULL) {
if (!macvlan_port_exists(lowerdev)) {
err = macvlan_port_create(lowerdev);
if (err < 0)
return err;
}
port = lowerdev->macvlan_port;
port = macvlan_port_get(lowerdev);
vlan->lowerdev = lowerdev;
vlan->dev = dev;
@ -748,10 +751,11 @@ static int macvlan_device_event(struct notifier_block *unused,
struct macvlan_dev *vlan, *next;
struct macvlan_port *port;
port = dev->macvlan_port;
if (port == NULL)
if (!macvlan_port_exists(dev))
return NOTIFY_DONE;
port = macvlan_port_get(dev);
switch (event) {
case NETDEV_CHANGE:
list_for_each_entry(vlan, &port->vlans, list)

1
include/linux/if.h
View File

@ -73,6 +73,7 @@
#define IFF_DONT_BRIDGE 0x800 /* disallow bridging this ether dev */
#define IFF_IN_NETPOLL 0x1000 /* whether we are processing netpoll */
#define IFF_DISABLE_NETPOLL 0x2000 /* disable netpoll at run-time */
#define IFF_MACVLAN_PORT 0x4000 /* device used as macvlan port */
#define IF_GET_IFACE 0x0001 /* for querying only */
#define IF_GET_PROTO 0x0002

2
include/linux/netdevice.h
View File

@ -1049,8 +1049,6 @@ struct net_device {
/* bridge stuff */
struct net_bridge_port *br_port;
/* macvlan */
struct macvlan_port *macvlan_port;
/* GARP */
struct garp_port *garp_port;