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Commit dcc38c03 authored by Thomas Graf's avatar Thomas Graf Committed by David S. Miller
Browse files

openvswitch: Re-add CONFIG_OPENVSWITCH_VXLAN 



This readds the config option CONFIG_OPENVSWITCH_VXLAN to avoid a
hard dependency of OVS on VXLAN. It moves the VXLAN config compat
code to vport-vxlan.c and allows compliation as a module.

Fixes: 614732ea ("openvswitch: Use regular VXLAN net_device device")
Fixes: 2661371a ("openvswitch: fix compilation when vxlan is a module")
Cc: Pravin B Shelar <pshelar@nicira.com>
Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: default avatarThomas Graf <tgraf@suug.ch>
Acked-by: default avatarPravin B Shelar <pshelar@nicira.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1ce4b2f4

net/openvswitch/Kconfig

+12 −1
Original line number Diff line number Diff line
@@ -5,7 +5,6 @@ 
config OPENVSWITCH

	tristate "Open vSwitch"

	depends on INET

	depends on VXLAN

	select LIBCRC32C

	select MPLS

	select NET_MPLS_GSO
@@ -45,6 +44,18 @@ config OPENVSWITCH_GRE 


	  If unsure, say Y.



config OPENVSWITCH_VXLAN

	tristate "Open vSwitch VXLAN tunneling support"

	depends on OPENVSWITCH

	depends on VXLAN

	default OPENVSWITCH

	---help---

	  If you say Y here, then the Open vSwitch will be able create vxlan vport.



	  Say N to exclude this support and reduce the binary size.



	  If unsure, say Y.



config OPENVSWITCH_GENEVE

	tristate "Open vSwitch Geneve tunneling support"

	depends on OPENVSWITCH

net/openvswitch/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -15,5 +15,6 @@ openvswitch-y := \ 
	vport-internal_dev.o \

	vport-netdev.o



obj-$(CONFIG_OPENVSWITCH_VXLAN)+= vport-vxlan.o

obj-$(CONFIG_OPENVSWITCH_GENEVE)+= vport-geneve.o

obj-$(CONFIG_OPENVSWITCH_GRE)	+= vport-gre.o

net/openvswitch/vport-netdev.c

+12 −199
Original line number Diff line number Diff line
@@ -26,11 +26,10 @@ 
#include <linux/rtnetlink.h>

#include <linux/skbuff.h>

#include <linux/openvswitch.h>

#include <linux/export.h>



#include <net/udp.h>

#include <net/ip_tunnels.h>

#include <net/rtnetlink.h>

#include <net/vxlan.h>



#include "datapath.h"

#include "vport.h"
@@ -90,7 +89,7 @@ static struct net_device *get_dpdev(const struct datapath *dp) 
	return local->dev;

}



static struct vport *netdev_link(struct vport *vport, const char *name)

struct vport *ovs_netdev_link(struct vport *vport, const char *name)

{

	int err;
@@ -135,6 +134,7 @@ error_free_vport: 
	ovs_vport_free(vport);

	return ERR_PTR(err);

}

EXPORT_SYMBOL_GPL(ovs_netdev_link);



static struct vport *netdev_create(const struct vport_parms *parms)

{
@@ -144,10 +144,10 @@ static struct vport *netdev_create(const struct vport_parms *parms) 
	if (IS_ERR(vport))

		return vport;



	return netdev_link(vport, parms->name);

	return ovs_netdev_link(vport, parms->name);

}



static void free_port_rcu(struct rcu_head *rcu)

void ovs_vport_free_rcu(struct rcu_head *rcu)

{

	struct vport *vport = container_of(rcu, struct vport, rcu);
@@ -155,6 +155,7 @@ static void free_port_rcu(struct rcu_head *rcu) 
		dev_put(vport->dev);

	ovs_vport_free(vport);

}

EXPORT_SYMBOL_GPL(ovs_vport_free_rcu);



void ovs_netdev_detach_dev(struct vport *vport)

{
@@ -165,6 +166,7 @@ void ovs_netdev_detach_dev(struct vport *vport) 
				netdev_master_upper_dev_get(vport->dev));

	dev_set_promiscuity(vport->dev, -1);

}

EXPORT_SYMBOL_GPL(ovs_netdev_detach_dev);



static void netdev_destroy(struct vport *vport)

{
@@ -173,7 +175,7 @@ static void netdev_destroy(struct vport *vport) 
		ovs_netdev_detach_dev(vport);

	rtnl_unlock();



	call_rcu(&vport->rcu, free_port_rcu);

	call_rcu(&vport->rcu, ovs_vport_free_rcu);

}



static unsigned int packet_length(const struct sk_buff *skb)
@@ -186,7 +188,7 @@ static unsigned int packet_length(const struct sk_buff *skb) 
	return length;

}



static int netdev_send(struct vport *vport, struct sk_buff *skb)

int ovs_netdev_send(struct vport *vport, struct sk_buff *skb)

{

	int mtu = vport->dev->mtu;

	int len;
@@ -208,6 +210,7 @@ drop: 
	kfree_skb(skb);

	return 0;

}

EXPORT_SYMBOL_GPL(ovs_netdev_send);



/* Returns null if this device is not attached to a datapath. */

struct vport *ovs_netdev_get_vport(struct net_device *dev)
@@ -223,205 +226,15 @@ static struct vport_ops ovs_netdev_vport_ops = { 
	.type		= OVS_VPORT_TYPE_NETDEV,

	.create		= netdev_create,

	.destroy	= netdev_destroy,

	.send		= netdev_send,

	.send		= ovs_netdev_send,

};



/* Compat code for old userspace. */

#if IS_ENABLED(CONFIG_VXLAN)

static struct vport_ops ovs_vxlan_netdev_vport_ops;



static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)

{

	struct vxlan_dev *vxlan = netdev_priv(vport->dev);

	__be16 dst_port = vxlan->cfg.dst_port;



	if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))

		return -EMSGSIZE;



	if (vxlan->flags & VXLAN_F_GBP) {

		struct nlattr *exts;



		exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION);

		if (!exts)

			return -EMSGSIZE;



		if (vxlan->flags & VXLAN_F_GBP &&

		    nla_put_flag(skb, OVS_VXLAN_EXT_GBP))

			return -EMSGSIZE;



		nla_nest_end(skb, exts);

	}



	return 0;

}



static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {

	[OVS_VXLAN_EXT_GBP]	= { .type = NLA_FLAG, },

};



static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,

				struct vxlan_config *conf)

{

	struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];

	int err;



	if (nla_len(attr) < sizeof(struct nlattr))

		return -EINVAL;



	err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy);

	if (err < 0)

		return err;



	if (exts[OVS_VXLAN_EXT_GBP])

		conf->flags |= VXLAN_F_GBP;



	return 0;

}



static struct vport *vxlan_tnl_create(const struct vport_parms *parms)

{

	struct net *net = ovs_dp_get_net(parms->dp);

	struct nlattr *options = parms->options;

	struct net_device *dev;

	struct vport *vport;

	struct nlattr *a;

	int err;

	struct vxlan_config conf = {

		.no_share = true,

		.flags = VXLAN_F_FLOW_BASED | VXLAN_F_COLLECT_METADATA,

	};



	if (!options) {

		err = -EINVAL;

		goto error;

	}



	a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);

	if (a && nla_len(a) == sizeof(u16)) {

		conf.dst_port = htons(nla_get_u16(a));

	} else {

		/* Require destination port from userspace. */

		err = -EINVAL;

		goto error;

	}



	vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);

	if (IS_ERR(vport))

		return vport;



	a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);

	if (a) {

		err = vxlan_configure_exts(vport, a, &conf);

		if (err) {

			ovs_vport_free(vport);

			goto error;

		}

	}



	rtnl_lock();

	dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);

	if (IS_ERR(dev)) {

		rtnl_unlock();

		ovs_vport_free(vport);

		return ERR_CAST(dev);

	}



	dev_change_flags(dev, dev->flags | IFF_UP);

	rtnl_unlock();

	return vport;

error:

	return ERR_PTR(err);

}



static struct vport *vxlan_create(const struct vport_parms *parms)

{

	struct vport *vport;



	vport = vxlan_tnl_create(parms);

	if (IS_ERR(vport))

		return vport;



	return netdev_link(vport, parms->name);

}



static void vxlan_destroy(struct vport *vport)

{

	rtnl_lock();

	if (vport->dev->priv_flags & IFF_OVS_DATAPATH)

		ovs_netdev_detach_dev(vport);



	/* Early release so we can unregister the device */

	dev_put(vport->dev);

	rtnl_delete_link(vport->dev);

	vport->dev = NULL;

	rtnl_unlock();



	call_rcu(&vport->rcu, free_port_rcu);

}



static int vxlan_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,

				     struct ip_tunnel_info *egress_tun_info)

{

	struct vxlan_dev *vxlan = netdev_priv(vport->dev);

	struct net *net = ovs_dp_get_net(vport->dp);

	__be16 dst_port = vxlan_dev_dst_port(vxlan);

	__be16 src_port;

	int port_min;

	int port_max;



	inet_get_local_port_range(net, &port_min, &port_max);

	src_port = udp_flow_src_port(net, skb, 0, 0, true);



	return ovs_tunnel_get_egress_info(egress_tun_info, net,

					  OVS_CB(skb)->egress_tun_info,

					  IPPROTO_UDP, skb->mark,

					  src_port, dst_port);

}



static struct vport_ops ovs_vxlan_netdev_vport_ops = {

	.type		= OVS_VPORT_TYPE_VXLAN,

	.create		= vxlan_create,

	.destroy	= vxlan_destroy,

	.get_options	= vxlan_get_options,

	.send		= netdev_send,

	.get_egress_tun_info	= vxlan_get_egress_tun_info,

};



static int vxlan_compat_init(void)

{

	return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);

}



static void vxlan_compat_exit(void)

{

	ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);

}

#else

static int vxlan_compat_init(void)

{

	return 0;

}



static void vxlan_compat_exit(void)

{

}

#endif



int __init ovs_netdev_init(void)

{

	int err;



	err = ovs_vport_ops_register(&ovs_netdev_vport_ops);

	if (err)

		return err;

	err = vxlan_compat_init();

	if (err)

		vxlan_compat_exit();

	return err;

	return ovs_vport_ops_register(&ovs_netdev_vport_ops);

}



void ovs_netdev_exit(void)

{

	ovs_vport_ops_unregister(&ovs_netdev_vport_ops);

	vxlan_compat_exit();

}

net/openvswitch/vport-netdev.h

+3 −0
Original line number Diff line number Diff line
@@ -26,7 +26,10 @@ 


struct vport *ovs_netdev_get_vport(struct net_device *dev);



struct vport *ovs_netdev_link(struct vport *vport, const char *name);

int ovs_netdev_send(struct vport *vport, struct sk_buff *skb);

void ovs_netdev_detach_dev(struct vport *);

void ovs_vport_free_rcu(struct rcu_head *);



int __init ovs_netdev_init(void);

void ovs_netdev_exit(void);

net/openvswitch/vport-vxlan.c

0 → 100644
+207 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2014 Nicira, Inc.

 * Copyright (c) 2013 Cisco Systems, Inc.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of version 2 of the GNU General Public

 * License as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

 * General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA

 */



#include <linux/kernel.h>

#include <linux/skbuff.h>

#include <linux/openvswitch.h>

#include <linux/module.h>

#include <net/udp.h>

#include <net/ip_tunnels.h>

#include <net/rtnetlink.h>

#include <net/vxlan.h>



#include "datapath.h"

#include "vport.h"

#include "vport-netdev.h"



static struct vport_ops ovs_vxlan_netdev_vport_ops;



static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)

{

	struct vxlan_dev *vxlan = netdev_priv(vport->dev);

	__be16 dst_port = vxlan->cfg.dst_port;



	if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))

		return -EMSGSIZE;



	if (vxlan->flags & VXLAN_F_GBP) {

		struct nlattr *exts;



		exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION);

		if (!exts)

			return -EMSGSIZE;



		if (vxlan->flags & VXLAN_F_GBP &&

		    nla_put_flag(skb, OVS_VXLAN_EXT_GBP))

			return -EMSGSIZE;



		nla_nest_end(skb, exts);

	}



	return 0;

}



static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {

	[OVS_VXLAN_EXT_GBP]	= { .type = NLA_FLAG, },

};



static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,

				struct vxlan_config *conf)

{

	struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];

	int err;



	if (nla_len(attr) < sizeof(struct nlattr))

		return -EINVAL;



	err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy);

	if (err < 0)

		return err;



	if (exts[OVS_VXLAN_EXT_GBP])

		conf->flags |= VXLAN_F_GBP;



	return 0;

}



static struct vport *vxlan_tnl_create(const struct vport_parms *parms)

{

	struct net *net = ovs_dp_get_net(parms->dp);

	struct nlattr *options = parms->options;

	struct net_device *dev;

	struct vport *vport;

	struct nlattr *a;

	int err;

	struct vxlan_config conf = {

		.no_share = true,

		.flags = VXLAN_F_FLOW_BASED | VXLAN_F_COLLECT_METADATA,

	};



	if (!options) {

		err = -EINVAL;

		goto error;

	}



	a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);

	if (a && nla_len(a) == sizeof(u16)) {

		conf.dst_port = htons(nla_get_u16(a));

	} else {

		/* Require destination port from userspace. */

		err = -EINVAL;

		goto error;

	}



	vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);

	if (IS_ERR(vport))

		return vport;



	a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);

	if (a) {

		err = vxlan_configure_exts(vport, a, &conf);

		if (err) {

			ovs_vport_free(vport);

			goto error;

		}

	}



	rtnl_lock();

	dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);

	if (IS_ERR(dev)) {

		rtnl_unlock();

		ovs_vport_free(vport);

		return ERR_CAST(dev);

	}



	dev_change_flags(dev, dev->flags | IFF_UP);

	rtnl_unlock();

	return vport;

error:

	return ERR_PTR(err);

}



static struct vport *vxlan_create(const struct vport_parms *parms)

{

	struct vport *vport;



	vport = vxlan_tnl_create(parms);

	if (IS_ERR(vport))

		return vport;



	return ovs_netdev_link(vport, parms->name);

}



static void vxlan_destroy(struct vport *vport)

{

	rtnl_lock();

	if (vport->dev->priv_flags & IFF_OVS_DATAPATH)

		ovs_netdev_detach_dev(vport);



	/* Early release so we can unregister the device */

	dev_put(vport->dev);

	rtnl_delete_link(vport->dev);

	vport->dev = NULL;

	rtnl_unlock();



	call_rcu(&vport->rcu, ovs_vport_free_rcu);

}



static int vxlan_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,

				     struct ip_tunnel_info *egress_tun_info)

{

	struct vxlan_dev *vxlan = netdev_priv(vport->dev);

	struct net *net = ovs_dp_get_net(vport->dp);

	__be16 dst_port = vxlan_dev_dst_port(vxlan);

	__be16 src_port;

	int port_min;

	int port_max;



	inet_get_local_port_range(net, &port_min, &port_max);

	src_port = udp_flow_src_port(net, skb, 0, 0, true);



	return ovs_tunnel_get_egress_info(egress_tun_info, net,

					  OVS_CB(skb)->egress_tun_info,

					  IPPROTO_UDP, skb->mark,

					  src_port, dst_port);

}



static struct vport_ops ovs_vxlan_netdev_vport_ops = {

	.type			= OVS_VPORT_TYPE_VXLAN,

	.create			= vxlan_create,

	.destroy		= vxlan_destroy,

	.get_options		= vxlan_get_options,

	.send			= ovs_netdev_send,

	.get_egress_tun_info	= vxlan_get_egress_tun_info,

};



static int __init ovs_vxlan_tnl_init(void)

{

	return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);

}



static void __exit ovs_vxlan_tnl_exit(void)

{

	ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);

}



module_init(ovs_vxlan_tnl_init);

module_exit(ovs_vxlan_tnl_exit);



MODULE_DESCRIPTION("OVS: VXLAN switching port");

MODULE_LICENSE("GPL");

MODULE_ALIAS("vport-type-4");