[ovs.git] / lib / odp-execute.c

/*
 * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
 * Copyright (c) 2013 Simon Horman
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <config.h>
#include "odp-execute.h"
#include <linux/openvswitch.h>
#include <stdlib.h>
#include <string.h>

#include "netlink.h"
#include "ofpbuf.h"
#include "odp-util.h"
#include "packets.h"
#include "util.h"

static void
odp_eth_set_addrs(struct ofpbuf *packet, const struct ovs_key_ethernet *eth_key)
{
    struct eth_header *eh = packet->l2;

    memcpy(eh->eth_src, eth_key->eth_src, sizeof eh->eth_src);
    memcpy(eh->eth_dst, eth_key->eth_dst, sizeof eh->eth_dst);
}

static void
odp_set_tunnel_action(const struct nlattr *a, struct flow_tnl *tun_key)
{
    enum odp_key_fitness fitness;

    fitness = odp_tun_key_from_attr(a, tun_key);
    ovs_assert(fitness != ODP_FIT_ERROR);
}

static void
odp_execute_set_action(struct ofpbuf *packet, const struct nlattr *a,
                       struct flow *flow)
{
    enum ovs_key_attr type = nl_attr_type(a);
    const struct ovs_key_ipv4 *ipv4_key;
    const struct ovs_key_ipv6 *ipv6_key;
    const struct ovs_key_tcp *tcp_key;
    const struct ovs_key_udp *udp_key;

    switch (type) {
    case OVS_KEY_ATTR_PRIORITY:
        flow->skb_priority = nl_attr_get_u32(a);
        break;

    case OVS_KEY_ATTR_TUNNEL:
        odp_set_tunnel_action(a, &flow->tunnel);
        break;

    case OVS_KEY_ATTR_SKB_MARK:
        flow->skb_mark = nl_attr_get_u32(a);
        break;

    case OVS_KEY_ATTR_ETHERNET:
        odp_eth_set_addrs(packet,
                          nl_attr_get_unspec(a, sizeof(struct ovs_key_ethernet)));
        break;

    case OVS_KEY_ATTR_IPV4:
        ipv4_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv4));
        packet_set_ipv4(packet, ipv4_key->ipv4_src, ipv4_key->ipv4_dst,
                        ipv4_key->ipv4_tos, ipv4_key->ipv4_ttl);
        break;

    case OVS_KEY_ATTR_IPV6:
        ipv6_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv6));
        packet_set_ipv6(packet, ipv6_key->ipv6_proto, ipv6_key->ipv6_src,
                        ipv6_key->ipv6_dst, ipv6_key->ipv6_tclass,
                        ipv6_key->ipv6_label, ipv6_key->ipv6_hlimit);
        break;

    case OVS_KEY_ATTR_TCP:
        tcp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_tcp));
        packet_set_tcp_port(packet, tcp_key->tcp_src, tcp_key->tcp_dst);
        break;

     case OVS_KEY_ATTR_UDP:
        udp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_udp));
        packet_set_udp_port(packet, udp_key->udp_src, udp_key->udp_dst);
        break;

     case OVS_KEY_ATTR_MPLS:
         set_mpls_lse(packet, nl_attr_get_be32(a));
         break;

     case OVS_KEY_ATTR_UNSPEC:
     case OVS_KEY_ATTR_ENCAP:
     case OVS_KEY_ATTR_ETHERTYPE:
     case OVS_KEY_ATTR_IN_PORT:
     case OVS_KEY_ATTR_VLAN:
     case OVS_KEY_ATTR_ICMP:
     case OVS_KEY_ATTR_ICMPV6:
     case OVS_KEY_ATTR_ARP:
     case OVS_KEY_ATTR_ND:
     case __OVS_KEY_ATTR_MAX:
     default:
        NOT_REACHED();
    }
}

static void
odp_execute_sample(void *dp, struct ofpbuf *packet, struct flow *key,
                   const struct nlattr *action,
                   void (*output)(void *dp, struct ofpbuf *packet,
                                  uint32_t out_port),
                   void (*userspace)(void *dp, struct ofpbuf *packet,
                                     const struct flow *key,
                                     const struct nlattr *a))
{
    const struct nlattr *subactions = NULL;
    const struct nlattr *a;
    size_t left;

    NL_NESTED_FOR_EACH_UNSAFE (a, left, action) {
        int type = nl_attr_type(a);

        switch ((enum ovs_sample_attr) type) {
        case OVS_SAMPLE_ATTR_PROBABILITY:
            if (random_uint32() >= nl_attr_get_u32(a)) {
                return;
            }
            break;

        case OVS_SAMPLE_ATTR_ACTIONS:
            subactions = a;
            break;

        case OVS_SAMPLE_ATTR_UNSPEC:
        case __OVS_SAMPLE_ATTR_MAX:
        default:
            NOT_REACHED();
        }
    }

    odp_execute_actions(dp, packet, key, nl_attr_get(subactions),
                        nl_attr_get_size(subactions), output, userspace);
}

void
odp_execute_actions(void *dp, struct ofpbuf *packet, struct flow *key,
                    const struct nlattr *actions, size_t actions_len,
                    void (*output)(void *dp, struct ofpbuf *packet,
                                   uint32_t out_port),
                    void (*userspace)(void *dp, struct ofpbuf *packet,
                                      const struct flow *key,
                                      const struct nlattr *a))
{
    const struct nlattr *a;
    unsigned int left;

    NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) {
        int type = nl_attr_type(a);

        switch ((enum ovs_action_attr) type) {
        case OVS_ACTION_ATTR_OUTPUT:
            if (output) {
                output(dp, packet, nl_attr_get_u32(a));
            }
            break;

        case OVS_ACTION_ATTR_USERSPACE: {
            const struct nlattr *userdata;

            userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
            userspace(dp, packet, key, userdata);
            break;
        }

        case OVS_ACTION_ATTR_PUSH_VLAN: {
            const struct ovs_action_push_vlan *vlan = nl_attr_get(a);
            eth_push_vlan(packet, vlan->vlan_tci);
            break;
        }

        case OVS_ACTION_ATTR_POP_VLAN:
            eth_pop_vlan(packet);
            break;

        case OVS_ACTION_ATTR_PUSH_MPLS: {
            const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
            push_mpls(packet, mpls->mpls_ethertype, mpls->mpls_lse);
            break;
         }

        case OVS_ACTION_ATTR_POP_MPLS:
            pop_mpls(packet, nl_attr_get_be16(a));
            break;

        case OVS_ACTION_ATTR_SET:
            odp_execute_set_action(packet, nl_attr_get(a), key);
            break;

        case OVS_ACTION_ATTR_SAMPLE:
            odp_execute_sample(dp, packet, key, a, output, userspace);
            break;

        case OVS_ACTION_ATTR_UNSPEC:
        case __OVS_ACTION_ATTR_MAX:
            NOT_REACHED();
        }
    }
}
Commit	Line	Data
f094af7b SH	1	/*
	2	* Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
	3	* Copyright (c) 2013 Simon Horman
	4	*
	5	* Licensed under the Apache License, Version 2.0 (the "License");
	6	* you may not use this file except in compliance with the License.
	7	* You may obtain a copy of the License at:
	8	*
	9	* http://www.apache.org/licenses/LICENSE-2.0
	10	*
	11	* Unless required by applicable law or agreed to in writing, software
	12	* distributed under the License is distributed on an "AS IS" BASIS,
	13	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	14	* See the License for the specific language governing permissions and
	15	* limitations under the License.
	16	*/
	17
	18	#include <config.h>
	19	#include "odp-execute.h"
	20	#include <linux/openvswitch.h>
	21	#include <stdlib.h>
	22	#include <string.h>
	23
	24	#include "netlink.h"
	25	#include "ofpbuf.h"
6c13071b	26	#include "odp-util.h"
f094af7b SH	27	#include "packets.h"
	28	#include "util.h"
	29
	30	static void
	31	odp_eth_set_addrs(struct ofpbuf packet, const struct ovs_key_ethernet eth_key)
	32	{
	33	struct eth_header *eh = packet->l2;
	34
	35	memcpy(eh->eth_src, eth_key->eth_src, sizeof eh->eth_src);
	36	memcpy(eh->eth_dst, eth_key->eth_dst, sizeof eh->eth_dst);
	37	}
	38
	39	static void
6c13071b SH	40	odp_set_tunnel_action(const struct nlattr a, struct flow_tnl tun_key)
	41	{
	42	enum odp_key_fitness fitness;
	43
	44	fitness = odp_tun_key_from_attr(a, tun_key);
	45	ovs_assert(fitness != ODP_FIT_ERROR);
	46	}
	47
	48	static void
	49	odp_execute_set_action(struct ofpbuf packet, const struct nlattr a,
	50	struct flow *flow)
f094af7b SH	51	{
	52	enum ovs_key_attr type = nl_attr_type(a);
	53	const struct ovs_key_ipv4 *ipv4_key;
	54	const struct ovs_key_ipv6 *ipv6_key;
	55	const struct ovs_key_tcp *tcp_key;
	56	const struct ovs_key_udp *udp_key;
	57
	58	switch (type) {
	59	case OVS_KEY_ATTR_PRIORITY:
6c13071b SH	60	flow->skb_priority = nl_attr_get_u32(a);
	61	break;
	62
f094af7b	63	case OVS_KEY_ATTR_TUNNEL:
6c13071b SH	64	odp_set_tunnel_action(a, &flow->tunnel);
	65	break;
	66
f094af7b	67	case OVS_KEY_ATTR_SKB_MARK:
6c13071b	68	flow->skb_mark = nl_attr_get_u32(a);
f094af7b SH	69	break;
	70
	71	case OVS_KEY_ATTR_ETHERNET:
	72	odp_eth_set_addrs(packet,
	73	nl_attr_get_unspec(a, sizeof(struct ovs_key_ethernet)));
	74	break;
	75
	76	case OVS_KEY_ATTR_IPV4:
	77	ipv4_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv4));
	78	packet_set_ipv4(packet, ipv4_key->ipv4_src, ipv4_key->ipv4_dst,
	79	ipv4_key->ipv4_tos, ipv4_key->ipv4_ttl);
	80	break;
	81
	82	case OVS_KEY_ATTR_IPV6:
	83	ipv6_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv6));
	84	packet_set_ipv6(packet, ipv6_key->ipv6_proto, ipv6_key->ipv6_src,
	85	ipv6_key->ipv6_dst, ipv6_key->ipv6_tclass,
	86	ipv6_key->ipv6_label, ipv6_key->ipv6_hlimit);
	87	break;
	88
	89	case OVS_KEY_ATTR_TCP:
	90	tcp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_tcp));
	91	packet_set_tcp_port(packet, tcp_key->tcp_src, tcp_key->tcp_dst);
	92	break;
	93
	94	case OVS_KEY_ATTR_UDP:
	95	udp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_udp));
	96	packet_set_udp_port(packet, udp_key->udp_src, udp_key->udp_dst);
	97	break;
	98
	99	case OVS_KEY_ATTR_MPLS:
	100	set_mpls_lse(packet, nl_attr_get_be32(a));
	101	break;
	102
	103	case OVS_KEY_ATTR_UNSPEC:
	104	case OVS_KEY_ATTR_ENCAP:
	105	case OVS_KEY_ATTR_ETHERTYPE:
	106	case OVS_KEY_ATTR_IN_PORT:
	107	case OVS_KEY_ATTR_VLAN:
	108	case OVS_KEY_ATTR_ICMP:
	109	case OVS_KEY_ATTR_ICMPV6:
	110	case OVS_KEY_ATTR_ARP:
	111	case OVS_KEY_ATTR_ND:
	112	case __OVS_KEY_ATTR_MAX:
	113	default:
	114	NOT_REACHED();
	115	}
	116	}
	117
	118	static void
	119	odp_execute_sample(void dp, struct ofpbuf packet, struct flow *key,
	120	const struct nlattr *action,
	121	void (output)(void dp, struct ofpbuf *packet,
	122	uint32_t out_port),
	123	void (userspace)(void dp, struct ofpbuf *packet,
	124	const struct flow *key,
	125	const struct nlattr *a))
	126	{
	127	const struct nlattr *subactions = NULL;
	128	const struct nlattr *a;
	129	size_t left;
	130
	131	NL_NESTED_FOR_EACH_UNSAFE (a, left, action) {
	132	int type = nl_attr_type(a);
133
134	switch ((enum ovs_sample_attr) type) {
135	case OVS_SAMPLE_ATTR_PROBABILITY:
136	if (random_uint32() >= nl_attr_get_u32(a)) {
137	return;
138	}
139	break;
140
141	case OVS_SAMPLE_ATTR_ACTIONS:
142	subactions = a;
143	break;
144
145	case OVS_SAMPLE_ATTR_UNSPEC:
146	case __OVS_SAMPLE_ATTR_MAX:
147	default:
148	NOT_REACHED();
149	}
150	}
151
152	odp_execute_actions(dp, packet, key, nl_attr_get(subactions),
153	nl_attr_get_size(subactions), output, userspace);
154	}
155
156	void
157	odp_execute_actions(void dp, struct ofpbuf packet, struct flow *key,
158	const struct nlattr *actions, size_t actions_len,
159	void (output)(void dp, struct ofpbuf *packet,
160	uint32_t out_port),
161	void (userspace)(void dp, struct ofpbuf *packet,
162	const struct flow *key,
163	const struct nlattr *a))
164	{
165	const struct nlattr *a;
166	unsigned int left;
167
168	NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) {
169	int type = nl_attr_type(a);
170
171	switch ((enum ovs_action_attr) type) {
172	case OVS_ACTION_ATTR_OUTPUT:
1ac7c9bd SH	173	if (output) {
	174	output(dp, packet, nl_attr_get_u32(a));
	175	}
f094af7b SH	176	break;
	177
	178	case OVS_ACTION_ATTR_USERSPACE: {
	179	const struct nlattr *userdata;
	180
	181	userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
	182	userspace(dp, packet, key, userdata);
	183	break;
	184	}
	185
	186	case OVS_ACTION_ATTR_PUSH_VLAN: {
	187	const struct ovs_action_push_vlan *vlan = nl_attr_get(a);
	188	eth_push_vlan(packet, vlan->vlan_tci);
	189	break;
	190	}
	191
	192	case OVS_ACTION_ATTR_POP_VLAN:
	193	eth_pop_vlan(packet);
	194	break;
	195
	196	case OVS_ACTION_ATTR_PUSH_MPLS: {
	197	const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
	198	push_mpls(packet, mpls->mpls_ethertype, mpls->mpls_lse);
	199	break;
	200	}
	201
	202	case OVS_ACTION_ATTR_POP_MPLS:
	203	pop_mpls(packet, nl_attr_get_be16(a));
	204	break;
	205
	206	case OVS_ACTION_ATTR_SET:
6c13071b	207	odp_execute_set_action(packet, nl_attr_get(a), key);
f094af7b SH	208	break;
	209
	210	case OVS_ACTION_ATTR_SAMPLE:
	211	odp_execute_sample(dp, packet, key, a, output, userspace);
	212	break;
	213
	214	case OVS_ACTION_ATTR_UNSPEC:
	215	case __OVS_ACTION_ATTR_MAX:
	216	NOT_REACHED();
	217	}
	218	}
	219	}