net_device: add support for network device groups
Net devices can now be grouped, enabling simpler manipulation from
userspace. This patch adds a group field to the net_device structure, as
well as rtnetlink support to query and modify it.
Signed-off-by: Vlad Dogaru <ddvlad@rosedu.org>
Acked-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d971346..68a4627 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -75,6 +75,9 @@
#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
#define NET_RX_DROP 1 /* packet dropped */
+/* Initial net device group. All devices belong to group 0 by default. */
+#define INIT_NETDEV_GROUP 0
+
/*
* Transmit return codes: transmit return codes originate from three different
* namespaces:
@@ -1153,6 +1156,9 @@
/* phy device may attach itself for hardware timestamping */
struct phy_device *phydev;
+
+ /* group the device belongs to */
+ int group;
};
#define to_net_dev(d) container_of(d, struct net_device, dev)
@@ -1844,6 +1850,7 @@
extern int dev_change_net_namespace(struct net_device *,
struct net *, const char *);
extern int dev_set_mtu(struct net_device *, int);
+extern void dev_set_group(struct net_device *, int);
extern int dev_set_mac_address(struct net_device *,
struct sockaddr *);
extern int dev_hard_start_xmit(struct sk_buff *skb,