/*
- * Copyright (c) 2014 Nicira, Inc.
+ * Copyright (c) 2015 Nicira, 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
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#include <linux/version.h>
-
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/net.h>
#include <linux/rculist.h>
#include <linux/udp.h>
+#include <linux/if_vlan.h>
+#include <linux/module.h>
#include <net/geneve.h>
#include <net/icmp.h>
#include <net/xfrm.h>
#include "datapath.h"
-#include "gso.h"
#include "vport.h"
+#include "vport-netdev.h"
-/*
- * Geneve Header:
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * |Ver| Opt Len |O|C| Rsvd. | Protocol Type |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Virtual Network Identifier (VNI) | Reserved |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Variable Length Options |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- *
- * Option Header:
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Option Class | Type |R|R|R| Length |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | Variable Option Data |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-
-struct genevehdr {
-#ifdef __LITTLE_ENDIAN_BITFIELD
- u8 opt_len:6;
- u8 ver:2;
- u8 rsvd1:6;
- u8 critical:1;
- u8 oam:1;
-#else
- u8 ver:2;
- u8 opt_len:6;
- u8 oam:1;
- u8 critical:1;
- u8 rsvd1:6;
-#endif
- __be16 proto_type;
- u8 vni[3];
- u8 rsvd2;
- struct geneve_opt options[];
-};
-
-#define GENEVE_VER 0
-
-#define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr))
-
+static struct vport_ops ovs_geneve_vport_ops;
/**
* struct geneve_port - Keeps track of open UDP ports
- * @sock: The socket created for this port number.
- * @name: vport name.
+ * @dst_port: destination port.
*/
struct geneve_port {
- struct socket *sock;
- char name[IFNAMSIZ];
+ u16 port_no;
};
-static LIST_HEAD(geneve_ports);
-
static inline struct geneve_port *geneve_vport(const struct vport *vport)
{
return vport_priv(vport);
}
-static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
-{
- return (struct genevehdr *)(udp_hdr(skb) + 1);
-}
-
-/* Convert 64 bit tunnel ID to 24 bit VNI. */
-static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
-{
-#ifdef __BIG_ENDIAN
- vni[0] = (__force __u8)(tun_id >> 16);
- vni[1] = (__force __u8)(tun_id >> 8);
- vni[2] = (__force __u8)tun_id;
-#else
- vni[0] = (__force __u8)((__force u64)tun_id >> 40);
- vni[1] = (__force __u8)((__force u64)tun_id >> 48);
- vni[2] = (__force __u8)((__force u64)tun_id >> 56);
-#endif
-}
-
-/* Convert 24 bit VNI to 64 bit tunnel ID. */
-static __be64 vni_to_tunnel_id(const __u8 *vni)
-{
-#ifdef __BIG_ENDIAN
- return (vni[0] << 16) | (vni[1] << 8) | vni[2];
-#else
- return (__force __be64)(((__force u64)vni[0] << 40) |
- ((__force u64)vni[1] << 48) |
- ((__force u64)vni[2] << 56));
-#endif
-}
-
-static void geneve_build_header(const struct vport *vport,
- struct sk_buff *skb)
-{
- struct geneve_port *geneve_port = geneve_vport(vport);
- struct net *net = ovs_dp_get_net(vport->dp);
- struct udphdr *udph = udp_hdr(skb);
- struct genevehdr *geneveh = (struct genevehdr *)(udph + 1);
- const struct ovs_tunnel_info *tun_info = OVS_CB(skb)->egress_tun_info;
-
- udph->dest = inet_sport(geneve_port->sock->sk);
- udph->source = udp_flow_src_port(net, skb, 0, 0, true);
- udph->check = 0;
- udph->len = htons(skb->len - skb_transport_offset(skb));
-
- geneveh->ver = GENEVE_VER;
- geneveh->opt_len = tun_info->options_len / 4;
- geneveh->oam = !!(tun_info->tunnel.tun_flags & TUNNEL_OAM);
- geneveh->critical = !!(tun_info->tunnel.tun_flags & TUNNEL_CRIT_OPT);
- geneveh->rsvd1 = 0;
- geneveh->proto_type = htons(ETH_P_TEB);
- tunnel_id_to_vni(tun_info->tunnel.tun_id, geneveh->vni);
- geneveh->rsvd2 = 0;
-
- memcpy(geneveh->options, tun_info->options, tun_info->options_len);
-}
-
-static int geneve_rcv(struct sock *sk, struct sk_buff *skb)
-{
- struct geneve_port *geneve_port;
- struct genevehdr *geneveh;
- int opts_len;
- struct ovs_tunnel_info tun_info;
- __be64 key;
- __be16 flags;
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
- if (unlikely(udp_lib_checksum_complete(skb)))
- goto error;
-#endif
-
- if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN)))
- goto error;
-
- geneveh = geneve_hdr(skb);
-
- if (unlikely(geneveh->ver != GENEVE_VER))
- goto error;
-
- if (unlikely(geneveh->proto_type != htons(ETH_P_TEB)))
- goto error;
-
- geneve_port = rcu_dereference_sk_user_data(sk);
- if (unlikely(!geneve_port))
- goto error;
-
- opts_len = geneveh->opt_len * 4;
- if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len,
- htons(ETH_P_TEB)))
- goto error;
-
- geneveh = geneve_hdr(skb);
-
- flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT |
- (udp_hdr(skb)->check != 0 ? TUNNEL_CSUM : 0) |
- (geneveh->oam ? TUNNEL_OAM : 0) |
- (geneveh->critical ? TUNNEL_CRIT_OPT : 0);
-
- key = vni_to_tunnel_id(geneveh->vni);
- ovs_flow_tun_info_init(&tun_info, ip_hdr(skb),
- udp_hdr(skb)->source, udp_hdr(skb)->dest,
- key, flags,
- geneveh->options, opts_len);
-
- ovs_vport_receive(vport_from_priv(geneve_port), skb, &tun_info);
- goto out;
-
-error:
- kfree_skb(skb);
-out:
- return 0;
-}
-
-/* Arbitrary value. Irrelevant as long as it's not 0 since we set the handler. */
-#define UDP_ENCAP_GENEVE 1
-static int geneve_socket_init(struct geneve_port *geneve_port, struct net *net,
- __be16 dst_port)
-{
- struct sockaddr_in sin;
- int err;
-
- err = sock_create_kern(AF_INET, SOCK_DGRAM, 0,
- &geneve_port->sock);
- if (err)
- goto error;
-
- /* release net ref. */
- sk_change_net(geneve_port->sock->sk, net);
-
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = htonl(INADDR_ANY);
- sin.sin_port = dst_port;
-
- err = kernel_bind(geneve_port->sock,
- (struct sockaddr *)&sin, sizeof(struct sockaddr_in));
- if (err)
- goto error_sock;
-
- rcu_assign_sk_user_data(geneve_port->sock->sk, geneve_port);
- udp_sk(geneve_port->sock->sk)->encap_type = UDP_ENCAP_GENEVE;
- udp_sk(geneve_port->sock->sk)->encap_rcv = geneve_rcv;
-
- udp_encap_enable();
-
- return 0;
-
-error_sock:
- sk_release_kernel(geneve_port->sock->sk);
-error:
- pr_warn("cannot register geneve protocol handler: %d\n", err);
- return err;
-}
-
static int geneve_get_options(const struct vport *vport,
struct sk_buff *skb)
{
struct geneve_port *geneve_port = geneve_vport(vport);
- if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT,
- ntohs(inet_sport(geneve_port->sock->sk))))
+ if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, geneve_port->port_no))
return -EMSGSIZE;
return 0;
}
-static void geneve_tnl_destroy(struct vport *vport)
+static int geneve_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
+ struct dp_upcall_info *upcall)
{
struct geneve_port *geneve_port = geneve_vport(vport);
+ struct net *net = ovs_dp_get_net(vport->dp);
+ __be16 dport = htons(geneve_port->port_no);
+ __be16 sport = udp_flow_src_port(net, skb, 1, USHRT_MAX, true);
- /* Release socket */
- rcu_assign_sk_user_data(geneve_port->sock->sk, NULL);
- sk_release_kernel(geneve_port->sock->sk);
-
- ovs_vport_deferred_free(vport);
+ return ovs_tunnel_get_egress_info(upcall, ovs_dp_get_net(vport->dp),
+ skb, IPPROTO_UDP, sport, dport);
}
static struct vport *geneve_tnl_create(const struct vport_parms *parms)
struct net *net = ovs_dp_get_net(parms->dp);
struct nlattr *options = parms->options;
struct geneve_port *geneve_port;
+ struct net_device *dev;
struct vport *vport;
struct nlattr *a;
- int err;
u16 dst_port;
+ int err;
if (!options) {
err = -EINVAL;
return vport;
geneve_port = geneve_vport(vport);
- strncpy(geneve_port->name, parms->name, IFNAMSIZ);
-
- err = geneve_socket_init(geneve_port, net, htons(dst_port));
- if (err)
- goto error_free;
+ geneve_port->port_no = dst_port;
+
+ rtnl_lock();
+ dev = geneve_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port);
+ 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_free:
- ovs_vport_free(vport);
error:
return ERR_PTR(err);
}
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,12,0)
-
-static void geneve_fix_segment(struct sk_buff *skb)
+static struct vport *geneve_create(const struct vport_parms *parms)
{
- struct udphdr *udph = udp_hdr(skb);
+ struct vport *vport;
- udph->len = htons(skb->len - skb_transport_offset(skb));
-}
+ vport = geneve_tnl_create(parms);
+ if (IS_ERR(vport))
+ return vport;
-static struct sk_buff *handle_offloads(struct sk_buff *skb)
-{
- return ovs_iptunnel_handle_offloads(skb, false, geneve_fix_segment);
+ return ovs_netdev_link(vport, parms->name);
}
-#else
-
-static struct sk_buff *handle_offloads(struct sk_buff *skb)
-{
- int err = 0;
-
- if (skb_is_gso(skb)) {
- if (skb_is_encapsulated(skb)) {
- err = -ENOSYS;
- goto error;
- }
-
- err = skb_unclone(skb, GFP_ATOMIC);
- if (unlikely(err))
- goto error;
-
- skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL;
- } else if (skb->ip_summed != CHECKSUM_PARTIAL)
- skb->ip_summed = CHECKSUM_NONE;
-
- skb->encapsulation = 1;
- return skb;
-error:
- kfree_skb(skb);
- return ERR_PTR(err);
-}
-#endif
+static struct vport_ops ovs_geneve_vport_ops = {
+ .type = OVS_VPORT_TYPE_GENEVE,
+ .create = geneve_create,
+ .destroy = ovs_netdev_tunnel_destroy,
+ .get_options = geneve_get_options,
+ .send = geneve_xmit,
+ .get_egress_tun_info = geneve_get_egress_tun_info,
+};
-static int geneve_send(struct vport *vport, struct sk_buff *skb)
+static int __init ovs_geneve_tnl_init(void)
{
- struct ovs_key_ipv4_tunnel *tun_key;
- int network_offset = skb_network_offset(skb);
- struct rtable *rt;
- int min_headroom;
- __be32 saddr;
- __be16 df;
- int sent_len;
- int err;
-
- if (unlikely(!OVS_CB(skb)->egress_tun_info)) {
- err = -EINVAL;
- goto error;
- }
-
- tun_key = &OVS_CB(skb)->egress_tun_info->tunnel;
-
- /* Route lookup */
- saddr = tun_key->ipv4_src;
- rt = find_route(ovs_dp_get_net(vport->dp),
- &saddr, tun_key->ipv4_dst,
- IPPROTO_UDP, tun_key->ipv4_tos,
- skb->mark);
- if (IS_ERR(rt)) {
- err = PTR_ERR(rt);
- goto error;
- }
-
- min_headroom = LL_RESERVED_SPACE(rt_dst(rt).dev) + rt_dst(rt).header_len
- + GENEVE_BASE_HLEN
- + OVS_CB(skb)->egress_tun_info->options_len
- + sizeof(struct iphdr)
- + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
-
- if (skb_headroom(skb) < min_headroom || skb_header_cloned(skb)) {
- int head_delta = SKB_DATA_ALIGN(min_headroom -
- skb_headroom(skb) +
- 16);
-
- err = pskb_expand_head(skb, max_t(int, head_delta, 0),
- 0, GFP_ATOMIC);
- if (unlikely(err))
- goto err_free_rt;
- }
-
- if (skb_vlan_tag_present(skb)) {
- if (unlikely(!vlan_insert_tag_set_proto(skb,
- skb->vlan_proto,
- skb_vlan_tag_get(skb)))) {
- err = -ENOMEM;
- skb = NULL;
- goto err_free_rt;
- }
- vlan_set_tci(skb, 0);
- }
-
- skb_reset_inner_headers(skb);
-
- __skb_push(skb, GENEVE_BASE_HLEN +
- OVS_CB(skb)->egress_tun_info->options_len);
- skb_reset_transport_header(skb);
-
- geneve_build_header(vport, skb);
-
- /* Offloading */
- skb = handle_offloads(skb);
- if (IS_ERR(skb)) {
- err = PTR_ERR(skb);
- skb = NULL;
- goto err_free_rt;
- }
-
- df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
-
- /* NOTE: If geneve_xmit_skb() is backported, opts may only be passed
- * in if TUNNEL_GENEVE_OPT is set, see upstream.
- */
-
- sent_len = iptunnel_xmit(skb->sk, rt, skb,
- saddr, tun_key->ipv4_dst,
- IPPROTO_UDP, tun_key->ipv4_tos,
- tun_key->ipv4_ttl,
- df, false);
-
- return sent_len > 0 ? sent_len + network_offset : sent_len;
-
-err_free_rt:
- ip_rt_put(rt);
-error:
- kfree_skb(skb);
- return err;
+ return ovs_vport_ops_register(&ovs_geneve_vport_ops);
}
-static const char *geneve_get_name(const struct vport *vport)
+static void __exit ovs_geneve_tnl_exit(void)
{
- struct geneve_port *geneve_port = geneve_vport(vport);
- return geneve_port->name;
+ ovs_vport_ops_unregister(&ovs_geneve_vport_ops);
}
-static int geneve_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
- struct ovs_tunnel_info *egress_tun_info)
-{
- struct geneve_port *geneve_port = geneve_vport(vport);
- struct net *net = ovs_dp_get_net(vport->dp);
-
- /*
- * Get tp_src and tp_dst, refert to geneve_build_header().
- */
- return ovs_tunnel_get_egress_info(egress_tun_info,
- ovs_dp_get_net(vport->dp),
- OVS_CB(skb)->egress_tun_info,
- IPPROTO_UDP, skb->mark,
- udp_flow_src_port(net, skb, 0, 0, true),
- inet_sport(geneve_port->sock->sk));
+module_init(ovs_geneve_tnl_init);
+module_exit(ovs_geneve_tnl_exit);
-}
-
-const struct vport_ops ovs_geneve_vport_ops = {
- .type = OVS_VPORT_TYPE_GENEVE,
- .create = geneve_tnl_create,
- .destroy = geneve_tnl_destroy,
- .get_name = geneve_get_name,
- .get_options = geneve_get_options,
- .send = geneve_send,
- .get_egress_tun_info = geneve_get_egress_tun_info,
-};
+MODULE_DESCRIPTION("OVS: Geneve switching port");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("vport-type-5");
projects / cascardo / ovs.git / blobdiff