* Copyright (c) 2014 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/ip.h>
#include <net/route.h>
#include <net/udp.h>
-#include <net/vxlan.h>
#include <net/xfrm.h>
#include "datapath.h"
-#include "gso.h"
#include "vport.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.
+ * @gs: The socket created for this port number.
* @name: vport name.
*/
struct geneve_port {
- struct socket *sock;
+ struct geneve_sock *gs;
char name[IFNAMSIZ];
};
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)
{
}
/* Convert 24 bit VNI to 64 bit tunnel ID. */
-static __be64 vni_to_tunnel_id(__u8 *vni)
+static __be64 vni_to_tunnel_id(const __u8 *vni)
{
#ifdef __BIG_ENDIAN
return (vni[0] << 16) | (vni[1] << 8) | vni[2];
#endif
}
-static void geneve_build_header(const struct vport *vport,
- struct sk_buff *skb)
+static void geneve_rcv(struct geneve_sock *gs, struct sk_buff *skb)
{
- struct geneve_port *geneve_port = geneve_vport(vport);
- struct udphdr *udph = udp_hdr(skb);
- struct genevehdr *geneveh = (struct genevehdr *)(udph + 1);
- const struct ovs_tunnel_info *tun_info = OVS_CB(skb)->tun_info;
-
- udph->dest = inet_sport(geneve_port->sock->sk);
- udph->source = vxlan_src_port(1, USHRT_MAX, skb);
- 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;
+ struct vport *vport = gs->rcv_data;
+ struct genevehdr *geneveh = geneve_hdr(skb);
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 |
+ 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), 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;
+ ovs_flow_tun_info_init(&tun_info, ip_hdr(skb),
+ udp_hdr(skb)->source, udp_hdr(skb)->dest,
+ key, flags,
+ geneveh->options, opts_len);
- 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;
+ ovs_vport_receive(vport, skb, &tun_info);
}
static int geneve_get_options(const struct vport *vport,
struct sk_buff *skb)
{
struct geneve_port *geneve_port = geneve_vport(vport);
+ __be16 dst_port = inet_sport(geneve_port->gs->sock->sk);
- 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, ntohs(dst_port)))
return -EMSGSIZE;
return 0;
}
{
struct geneve_port *geneve_port = geneve_vport(vport);
- /* Release socket */
- rcu_assign_sk_user_data(geneve_port->sock->sk, NULL);
- sk_release_kernel(geneve_port->sock->sk);
+ geneve_sock_release(geneve_port->gs);
ovs_vport_deferred_free(vport);
}
struct net *net = ovs_dp_get_net(parms->dp);
struct nlattr *options = parms->options;
struct geneve_port *geneve_port;
+ struct geneve_sock *gs;
struct vport *vport;
struct nlattr *a;
int err;
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;
+ gs = geneve_sock_add(net, htons(dst_port), geneve_rcv, vport, true, 0);
+ if (IS_ERR(gs)) {
+ ovs_vport_free(vport);
+ return (void *)gs;
+ }
+ geneve_port->gs = gs;
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)
-{
- struct udphdr *udph = udp_hdr(skb);
-
- udph->len = htons(skb->len - skb_transport_offset(skb));
-}
-
-static int handle_offloads(struct sk_buff *skb)
+static int geneve_tnl_send(struct vport *vport, struct sk_buff *skb)
{
- if (skb_is_gso(skb))
- OVS_GSO_CB(skb)->fix_segment = geneve_fix_segment;
- else if (skb->ip_summed != CHECKSUM_PARTIAL)
- skb->ip_summed = CHECKSUM_NONE;
- return 0;
-}
-#else
-static int handle_offloads(struct sk_buff *skb)
-{
- if (skb_is_gso(skb)) {
- int err = skb_unclone(skb, GFP_ATOMIC);
- if (unlikely(err))
- return err;
-
- 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 0;
-}
-#endif
-
-static int geneve_send(struct vport *vport, struct sk_buff *skb)
-{
- struct ovs_key_ipv4_tunnel *tun_key = &OVS_CB(skb)->tun_info->tunnel;
- int network_offset = skb_network_offset(skb);
- struct rtable *rt;
- int min_headroom;
+ const struct ovs_key_ipv4_tunnel *tun_key;
+ struct ovs_tunnel_info *tun_info;
+ struct net *net = ovs_dp_get_net(vport->dp);
+ struct geneve_port *geneve_port = geneve_vport(vport);
+ __be16 dport = inet_sport(geneve_port->gs->sock->sk);
+ __be16 sport;
__be32 saddr;
+ struct rtable *rt;
+ u8 vni[3], opts_len, *opts;
__be16 df;
- int sent_len;
int err;
- if (unlikely(!OVS_CB(skb)->tun_info))
- return -EINVAL;
+ tun_info = OVS_CB(skb)->egress_tun_info;
+ if (unlikely(!tun_info)) {
+ err = -EINVAL;
+ goto error;
+ }
+
+ tun_key = &tun_info->tunnel;
- /* Route lookup */
saddr = tun_key->ipv4_src;
rt = find_route(ovs_dp_get_net(vport->dp),
&saddr, tun_key->ipv4_dst,
goto error;
}
- min_headroom = LL_RESERVED_SPACE(rt_dst(rt).dev) + rt_dst(rt).header_len
- + GENEVE_BASE_HLEN + OVS_CB(skb)->tun_info->options_len
- + sizeof(struct iphdr)
- + (vlan_tx_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 (vlan_tx_tag_present(skb)) {
- if (unlikely(!__vlan_put_tag(skb,
- skb->vlan_proto,
- vlan_tx_tag_get(skb)))) {
- err = -ENOMEM;
- goto err_free_rt;
- }
- vlan_set_tci(skb, 0);
- }
-
- skb_reset_inner_headers(skb);
-
- __skb_push(skb, GENEVE_BASE_HLEN + OVS_CB(skb)->tun_info->options_len);
- skb_reset_transport_header(skb);
-
- geneve_build_header(vport, skb);
-
- /* Offloading */
- err = handle_offloads(skb);
- if (err)
- goto err_free_rt;
-
df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
+ sport = udp_flow_src_port(net, skb, 1, USHRT_MAX, true);
+ tunnel_id_to_vni(tun_key->tun_id, vni);
+ skb->ignore_df = 1;
- sent_len = iptunnel_xmit(rt, skb,
- saddr, tun_key->ipv4_dst,
- IPPROTO_UDP, tun_key->ipv4_tos,
- tun_key->ipv4_ttl,
- df, false);
+ if (tun_key->tun_flags & TUNNEL_GENEVE_OPT) {
+ opts = (u8 *)tun_info->options;
+ opts_len = tun_info->options_len;
+ } else {
+ opts = NULL;
+ opts_len = 0;
+ }
- return sent_len > 0 ? sent_len + network_offset : sent_len;
+ err = geneve_xmit_skb(geneve_port->gs, rt, skb, saddr,
+ tun_key->ipv4_dst, tun_key->ipv4_tos,
+ tun_key->ipv4_ttl, df, sport, dport,
+ tun_key->tun_flags, vni, opts_len, opts,
+ !!(tun_key->tun_flags & TUNNEL_CSUM), false);
+ if (err < 0)
+ ip_rt_put(rt);
+ return err;
-err_free_rt:
- ip_rt_put(rt);
error:
+ kfree_skb(skb);
return err;
}
static const char *geneve_get_name(const struct vport *vport)
{
struct geneve_port *geneve_port = geneve_vport(vport);
+
return geneve_port->name;
}
-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,
+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);
+ __be16 dport = inet_sport(geneve_port->gs->sock->sk);
+ __be16 sport = udp_flow_src_port(net, skb, 1, USHRT_MAX, true);
+
+ /* 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, sport, dport);
+}
+
+static 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_tnl_send,
+ .get_egress_tun_info = geneve_get_egress_tun_info,
+ .owner = THIS_MODULE,
};
+
+static int __init ovs_geneve_tnl_init(void)
+{
+ return ovs_vport_ops_register(&ovs_geneve_vport_ops);
+}
+
+static void __exit ovs_geneve_tnl_exit(void)
+{
+ ovs_vport_ops_unregister(&ovs_geneve_vport_ops);
+}
+
+module_init(ovs_geneve_tnl_init);
+module_exit(ovs_geneve_tnl_exit);
+
+MODULE_DESCRIPTION("OVS: Geneve swiching port");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("vport-type-5");
projects / cascardo / ovs.git / blobdiff