Commit 27c0b1a8 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by David S. Miller
Browse files

macvlan: export macvlan mode through netlink 



In order to support all three modes of macvlan at
runtime, extend the existing netlink protocol
to allow choosing the mode per macvlan slave
interface.

This depends on a matching patch to iproute2
in order to become accessible in user land.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 618e1b74

drivers/net/macvlan.c

+50 −6
Original line number Diff line number Diff line
@@ -33,12 +33,6 @@ 


#define MACVLAN_HASH_SIZE	(1 << BITS_PER_BYTE)



enum macvlan_mode {

	MACVLAN_MODE_PRIVATE	= 1,

	MACVLAN_MODE_VEPA	= 2,

	MACVLAN_MODE_BRIDGE	= 4,

};



struct macvlan_port {

	struct net_device	*dev;

	struct hlist_head	vlan_hash[MACVLAN_HASH_SIZE];
@@ -614,6 +608,17 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) 
		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))

			return -EADDRNOTAVAIL;

	}



	if (data && data[IFLA_MACVLAN_MODE]) {

		switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {

		case MACVLAN_MODE_PRIVATE:

		case MACVLAN_MODE_VEPA:

		case MACVLAN_MODE_BRIDGE:

			break;

		default:

			return -EINVAL;

		}

	}

	return 0;

}
@@ -678,6 +683,10 @@ static int macvlan_newlink(struct net *src_net, struct net_device *dev, 
	vlan->dev      = dev;

	vlan->port     = port;



	vlan->mode     = MACVLAN_MODE_VEPA;

	if (data && data[IFLA_MACVLAN_MODE])

		vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);



	err = register_netdevice(dev);

	if (err < 0)

		return err;
@@ -699,6 +708,36 @@ static void macvlan_dellink(struct net_device *dev, struct list_head *head) 
		macvlan_port_destroy(port->dev);

}



static int macvlan_changelink(struct net_device *dev,

		struct nlattr *tb[], struct nlattr *data[])

{

	struct macvlan_dev *vlan = netdev_priv(dev);

	if (data && data[IFLA_MACVLAN_MODE])

		vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);

	return 0;

}



static size_t macvlan_get_size(const struct net_device *dev)

{

	return nla_total_size(4);

}



static int macvlan_fill_info(struct sk_buff *skb,

				const struct net_device *dev)

{

	struct macvlan_dev *vlan = netdev_priv(dev);



	NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode);

	return 0;



nla_put_failure:

	return -EMSGSIZE;

}



static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {

	[IFLA_MACVLAN_MODE] = { .type = NLA_U32 },

};



static struct rtnl_link_ops macvlan_link_ops __read_mostly = {

	.kind		= "macvlan",

	.priv_size	= sizeof(struct macvlan_dev),
@@ -707,6 +746,11 @@ static struct rtnl_link_ops macvlan_link_ops __read_mostly = { 
	.validate	= macvlan_validate,

	.newlink	= macvlan_newlink,

	.dellink	= macvlan_dellink,

	.maxtype	= IFLA_MACVLAN_MAX,

	.policy		= macvlan_policy,

	.changelink	= macvlan_changelink,

	.get_size	= macvlan_get_size,

	.fill_info	= macvlan_fill_info,

};



static int macvlan_device_event(struct notifier_block *unused,

include/linux/if_link.h

+15 −0
Original line number Diff line number Diff line
@@ -181,4 +181,19 @@ struct ifla_vlan_qos_mapping { 
	__u32 to;

};



/* MACVLAN section */

enum {

	IFLA_MACVLAN_UNSPEC,

	IFLA_MACVLAN_MODE,

	__IFLA_MACVLAN_MAX,

};



#define IFLA_MACVLAN_MAX (__IFLA_MACVLAN_MAX - 1)



enum macvlan_mode {

	MACVLAN_MODE_PRIVATE = 1, /* don't talk to other macvlans */

	MACVLAN_MODE_VEPA    = 2, /* talk to other ports through ext bridge */

	MACVLAN_MODE_BRIDGE  = 4, /* talk to bridge ports directly */

};



#endif /* _LINUX_IF_LINK_H */