mirror of
https://github.com/openvswitch/ovs
synced 2025-10-09 13:49:05 +00:00
f6c8a6b163
This support is added through the userspace slow path, because we don't judge that this is important enough to require permanent support in the Linux kernel ABI. Bug #19259. CC: Teemu Koponen <koponen@nicira.com> CC: Pankaj Thakkar <thakkar@nicira.com> Signed-off-by: Ben Pfaff <blp@nicira.com>
241 lines
7.4 KiB
C
241 lines
7.4 KiB
C
/*
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* Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
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* Copyright (c) 2013 Simon Horman
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "odp-execute.h"
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#include <linux/openvswitch.h>
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#include <stdlib.h>
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#include <string.h>
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#include "netlink.h"
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#include "ofpbuf.h"
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#include "odp-util.h"
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#include "packets.h"
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#include "unaligned.h"
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#include "util.h"
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static void
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odp_eth_set_addrs(struct ofpbuf *packet, const struct ovs_key_ethernet *eth_key)
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{
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struct eth_header *eh = packet->l2;
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memcpy(eh->eth_src, eth_key->eth_src, sizeof eh->eth_src);
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memcpy(eh->eth_dst, eth_key->eth_dst, sizeof eh->eth_dst);
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}
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static void
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odp_set_tunnel_action(const struct nlattr *a, struct flow_tnl *tun_key)
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{
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enum odp_key_fitness fitness;
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fitness = odp_tun_key_from_attr(a, tun_key);
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ovs_assert(fitness != ODP_FIT_ERROR);
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}
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static void
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set_arp(struct ofpbuf *packet, const struct ovs_key_arp *arp_key)
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{
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struct arp_eth_header *arp = packet->l3;
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arp->ar_op = arp_key->arp_op;
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memcpy(arp->ar_sha, arp_key->arp_sha, ETH_ADDR_LEN);
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put_16aligned_be32(&arp->ar_spa, arp_key->arp_sip);
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memcpy(arp->ar_tha, arp_key->arp_tha, ETH_ADDR_LEN);
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put_16aligned_be32(&arp->ar_tpa, arp_key->arp_tip);
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}
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static void
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odp_execute_set_action(struct ofpbuf *packet, const struct nlattr *a,
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struct flow *flow)
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{
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enum ovs_key_attr type = nl_attr_type(a);
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const struct ovs_key_ipv4 *ipv4_key;
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const struct ovs_key_ipv6 *ipv6_key;
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const struct ovs_key_tcp *tcp_key;
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const struct ovs_key_udp *udp_key;
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const struct ovs_key_sctp *sctp_key;
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switch (type) {
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case OVS_KEY_ATTR_PRIORITY:
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flow->skb_priority = nl_attr_get_u32(a);
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break;
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case OVS_KEY_ATTR_TUNNEL:
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odp_set_tunnel_action(a, &flow->tunnel);
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break;
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case OVS_KEY_ATTR_SKB_MARK:
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flow->pkt_mark = nl_attr_get_u32(a);
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break;
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case OVS_KEY_ATTR_ETHERNET:
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odp_eth_set_addrs(packet,
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nl_attr_get_unspec(a, sizeof(struct ovs_key_ethernet)));
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break;
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case OVS_KEY_ATTR_IPV4:
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ipv4_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv4));
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packet_set_ipv4(packet, ipv4_key->ipv4_src, ipv4_key->ipv4_dst,
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ipv4_key->ipv4_tos, ipv4_key->ipv4_ttl);
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break;
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case OVS_KEY_ATTR_IPV6:
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ipv6_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv6));
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packet_set_ipv6(packet, ipv6_key->ipv6_proto, ipv6_key->ipv6_src,
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ipv6_key->ipv6_dst, ipv6_key->ipv6_tclass,
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ipv6_key->ipv6_label, ipv6_key->ipv6_hlimit);
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break;
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case OVS_KEY_ATTR_TCP:
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tcp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_tcp));
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packet_set_tcp_port(packet, tcp_key->tcp_src, tcp_key->tcp_dst);
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break;
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case OVS_KEY_ATTR_UDP:
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udp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_udp));
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packet_set_udp_port(packet, udp_key->udp_src, udp_key->udp_dst);
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break;
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case OVS_KEY_ATTR_SCTP:
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sctp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_sctp));
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packet_set_sctp_port(packet, sctp_key->sctp_src, sctp_key->sctp_dst);
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break;
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case OVS_KEY_ATTR_MPLS:
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set_mpls_lse(packet, nl_attr_get_be32(a));
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break;
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case OVS_KEY_ATTR_ARP:
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set_arp(packet, nl_attr_get_unspec(a, sizeof(struct ovs_key_arp)));
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break;
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case OVS_KEY_ATTR_UNSPEC:
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case OVS_KEY_ATTR_ENCAP:
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case OVS_KEY_ATTR_ETHERTYPE:
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case OVS_KEY_ATTR_IN_PORT:
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case OVS_KEY_ATTR_VLAN:
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case OVS_KEY_ATTR_ICMP:
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case OVS_KEY_ATTR_ICMPV6:
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case OVS_KEY_ATTR_ND:
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case __OVS_KEY_ATTR_MAX:
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default:
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NOT_REACHED();
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}
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}
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static void
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odp_execute_sample(void *dp, struct ofpbuf *packet, struct flow *key,
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const struct nlattr *action,
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void (*output)(void *dp, struct ofpbuf *packet,
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const struct flow *key,
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odp_port_t out_port),
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void (*userspace)(void *dp, struct ofpbuf *packet,
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const struct flow *key,
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const struct nlattr *action))
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{
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const struct nlattr *subactions = NULL;
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const struct nlattr *a;
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size_t left;
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NL_NESTED_FOR_EACH_UNSAFE (a, left, action) {
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int type = nl_attr_type(a);
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switch ((enum ovs_sample_attr) type) {
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case OVS_SAMPLE_ATTR_PROBABILITY:
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if (random_uint32() >= nl_attr_get_u32(a)) {
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return;
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}
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break;
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case OVS_SAMPLE_ATTR_ACTIONS:
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subactions = a;
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break;
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case OVS_SAMPLE_ATTR_UNSPEC:
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case __OVS_SAMPLE_ATTR_MAX:
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default:
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NOT_REACHED();
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}
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}
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odp_execute_actions(dp, packet, key, nl_attr_get(subactions),
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nl_attr_get_size(subactions), output, userspace);
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}
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void
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odp_execute_actions(void *dp, struct ofpbuf *packet, struct flow *key,
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const struct nlattr *actions, size_t actions_len,
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void (*output)(void *dp, struct ofpbuf *packet,
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const struct flow *key,
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odp_port_t out_port),
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void (*userspace)(void *dp, struct ofpbuf *packet,
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const struct flow *key,
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const struct nlattr *action))
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{
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const struct nlattr *a;
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unsigned int left;
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NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) {
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int type = nl_attr_type(a);
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switch ((enum ovs_action_attr) type) {
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case OVS_ACTION_ATTR_OUTPUT:
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if (output) {
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output(dp, packet, key, u32_to_odp(nl_attr_get_u32(a)));
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}
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break;
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case OVS_ACTION_ATTR_USERSPACE: {
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userspace(dp, packet, key, a);
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break;
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}
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case OVS_ACTION_ATTR_PUSH_VLAN: {
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const struct ovs_action_push_vlan *vlan = nl_attr_get(a);
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eth_push_vlan(packet, vlan->vlan_tci);
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break;
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}
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case OVS_ACTION_ATTR_POP_VLAN:
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eth_pop_vlan(packet);
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break;
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case OVS_ACTION_ATTR_PUSH_MPLS: {
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const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
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push_mpls(packet, mpls->mpls_ethertype, mpls->mpls_lse);
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break;
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}
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case OVS_ACTION_ATTR_POP_MPLS:
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pop_mpls(packet, nl_attr_get_be16(a));
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break;
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case OVS_ACTION_ATTR_SET:
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odp_execute_set_action(packet, nl_attr_get(a), key);
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break;
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case OVS_ACTION_ATTR_SAMPLE:
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odp_execute_sample(dp, packet, key, a, output, userspace);
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break;
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case OVS_ACTION_ATTR_UNSPEC:
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case __OVS_ACTION_ATTR_MAX:
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NOT_REACHED();
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}
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}
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}
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