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Commit 64bbca3c authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'udp_tunnel' 



Tom Herbert says:

====================
udp: UDP tunnel enhancements

- Add udp_sock_create in new helper module udp_tunnel. Tunnel
  implementations call this function to create listener UDP ports.
- Make vxlan and l2tp call udp_sock_create.
- Move udp_tunnel_segment into udp_offload.c.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 39b1c29b 155e010e

drivers/net/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -148,6 +148,7 @@ config VXLAN 
       tristate "Virtual eXtensible Local Area Network (VXLAN)"

       depends on INET

       select NET_IP_TUNNEL

       select NET_UDP_TUNNEL

       ---help---

	  This allows one to create vxlan virtual interfaces that provide

	  Layer 2 Networks over Layer 3 Networks. VXLAN is often used

drivers/net/vxlan.c

+24 −91
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 
#include <net/ip_tunnels.h>

#include <net/icmp.h>

#include <net/udp.h>

#include <net/udp_tunnel.h>

#include <net/rtnetlink.h>

#include <net/route.h>

#include <net/dsfield.h>
@@ -2339,102 +2340,37 @@ static void vxlan_del_work(struct work_struct *work) 
	kfree_rcu(vs, rcu);

}



#if IS_ENABLED(CONFIG_IPV6)

/* Create UDP socket for encapsulation receive. AF_INET6 socket

 * could be used for both IPv4 and IPv6 communications, but

 * users may set bindv6only=1.

 */

static struct socket *create_v6_sock(struct net *net, __be16 port, u32 flags)

static struct socket *vxlan_create_sock(struct net *net, bool ipv6,

					__be16 port, u32 flags)

{

	struct sock *sk;

	struct socket *sock;

	struct sockaddr_in6 vxlan_addr = {

		.sin6_family = AF_INET6,

		.sin6_port = port,

	};

	int rc, val = 1;



	rc = sock_create_kern(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock);

	if (rc < 0) {

		pr_debug("UDPv6 socket create failed\n");

		return ERR_PTR(rc);

	}



	/* Put in proper namespace */

	sk = sock->sk;

	sk_change_net(sk, net);



	kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY,

			  (char *)&val, sizeof(val));

	rc = kernel_bind(sock, (struct sockaddr *)&vxlan_addr,

			 sizeof(struct sockaddr_in6));

	if (rc < 0) {

		pr_debug("bind for UDPv6 socket %pI6:%u (%d)\n",

			 &vxlan_addr.sin6_addr, ntohs(vxlan_addr.sin6_port), rc);

		sk_release_kernel(sk);

		return ERR_PTR(rc);

	}

	/* At this point, IPv6 module should have been loaded in

	 * sock_create_kern().

	 */

	BUG_ON(!ipv6_stub);



	/* Disable multicast loopback */

	inet_sk(sk)->mc_loop = 0;



	if (flags & VXLAN_F_UDP_ZERO_CSUM6_TX)

		udp_set_no_check6_tx(sk, true);



	if (flags & VXLAN_F_UDP_ZERO_CSUM6_RX)

		udp_set_no_check6_rx(sk, true);



	return sock;

}



#else

	struct udp_port_cfg udp_conf;

	int err;



static struct socket *create_v6_sock(struct net *net, __be16 port, u32 flags)

{

		return ERR_PTR(-EPFNOSUPPORT);

}

#endif

	memset(&udp_conf, 0, sizeof(udp_conf));



static struct socket *create_v4_sock(struct net *net, __be16 port, u32 flags)

{

	struct sock *sk;

	struct socket *sock;

	struct sockaddr_in vxlan_addr = {

		.sin_family = AF_INET,

		.sin_addr.s_addr = htonl(INADDR_ANY),

		.sin_port = port,

	};

	int rc;



	/* Create UDP socket for encapsulation receive. */

	rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock);

	if (rc < 0) {

		pr_debug("UDP socket create failed\n");

		return ERR_PTR(rc);

	if (ipv6) {

		udp_conf.family = AF_INET6;

		udp_conf.use_udp6_tx_checksums =

		    !!(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);

		udp_conf.use_udp6_rx_checksums =

		    !!(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);

	} else {

		udp_conf.family = AF_INET;

		udp_conf.local_ip.s_addr = INADDR_ANY;

		udp_conf.use_udp_checksums =

		    !!(flags & VXLAN_F_UDP_CSUM);

	}



	/* Put in proper namespace */

	sk = sock->sk;

	sk_change_net(sk, net);

	udp_conf.local_udp_port = port;



	rc = kernel_bind(sock, (struct sockaddr *) &vxlan_addr,

			 sizeof(vxlan_addr));

	if (rc < 0) {

		pr_debug("bind for UDP socket %pI4:%u (%d)\n",

			 &vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc);

		sk_release_kernel(sk);

		return ERR_PTR(rc);

	}

	/* Open UDP socket */

	err = udp_sock_create(net, &udp_conf, &sock);

	if (err < 0)

		return ERR_PTR(err);



	/* Disable multicast loopback */

	inet_sk(sk)->mc_loop = 0;



	if (!(flags & VXLAN_F_UDP_CSUM))

		sock->sk->sk_no_check_tx = 1;

	inet_sk(sock->sk)->mc_loop = 0;



	return sock;

}
@@ -2460,10 +2396,7 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, 


	INIT_WORK(&vs->del_work, vxlan_del_work);



	if (ipv6)

		sock = create_v6_sock(net, port, flags);

	else

		sock = create_v4_sock(net, port, flags);

	sock = vxlan_create_sock(net, ipv6, port, flags);

	if (IS_ERR(sock)) {

		kfree(vs);

		return ERR_CAST(sock);

include/net/udp_tunnel.h

0 → 100644
+32 −0
Original line number Diff line number Diff line 
#ifndef __NET_UDP_TUNNEL_H

#define __NET_UDP_TUNNEL_H



struct udp_port_cfg {

	u8			family;



	/* Used only for kernel-created sockets */

	union {

		struct in_addr		local_ip;

#if IS_ENABLED(CONFIG_IPV6)

		struct in6_addr		local_ip6;

#endif

	};



	union {

		struct in_addr		peer_ip;

#if IS_ENABLED(CONFIG_IPV6)

		struct in6_addr		peer_ip6;

#endif

	};



	__be16			local_udp_port;

	__be16			peer_udp_port;

	unsigned int		use_udp_checksums:1,

				use_udp6_tx_checksums:1,

				use_udp6_rx_checksums:1;

};



int udp_sock_create(struct net *net, struct udp_port_cfg *cfg,

		    struct socket **sockp);



#endif

net/ipv4/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -307,6 +307,10 @@ config NET_IPVTI 
	  the notion of a secure tunnel for IPSEC and then use routing protocol

	  on top.



config NET_UDP_TUNNEL

	tristate

	default n



config INET_AH

	tristate "IP: AH transformation"

	select XFRM_ALGO

net/ipv4/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ obj-$(CONFIG_NET_IPIP) += ipip.o 
gre-y := gre_demux.o

obj-$(CONFIG_NET_IPGRE_DEMUX) += gre.o

obj-$(CONFIG_NET_IPGRE) += ip_gre.o

obj-$(CONFIG_NET_UDP_TUNNEL) += udp_tunnel.o

obj-$(CONFIG_NET_IPVTI) += ip_vti.o

obj-$(CONFIG_SYN_COOKIES) += syncookies.o

obj-$(CONFIG_INET_AH) += ah4.o