2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
3 * Copyright (c) 2013 Simon Horman
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:
9 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include "odp-execute.h"
20 #include <arpa/inet.h>
21 #include <netinet/ip6.h>
28 #include "odp-netlink.h"
30 #include "packet-dpif.h"
33 #include "unaligned.h"
36 /* Masked copy of an ethernet address. 'src' is already properly masked. */
38 ether_addr_copy_masked(uint8_t *dst, const uint8_t *src,
43 for (i = 0; i < ETH_ADDR_LEN; i++) {
44 dst[i] = src[i] | (dst[i] & ~mask[i]);
49 odp_eth_set_addrs(struct ofpbuf *packet, const struct ovs_key_ethernet *key,
50 const struct ovs_key_ethernet *mask)
52 struct eth_header *eh = ofpbuf_l2(packet);
56 memcpy(eh->eth_src, key->eth_src, sizeof eh->eth_src);
57 memcpy(eh->eth_dst, key->eth_dst, sizeof eh->eth_dst);
59 ether_addr_copy_masked(eh->eth_src, key->eth_src, mask->eth_src);
60 ether_addr_copy_masked(eh->eth_dst, key->eth_dst, mask->eth_dst);
66 odp_set_ipv4(struct ofpbuf *packet, const struct ovs_key_ipv4 *key,
67 const struct ovs_key_ipv4 *mask)
69 struct ip_header *nh = ofpbuf_l3(packet);
73 key->ipv4_src | (get_16aligned_be32(&nh->ip_src) & ~mask->ipv4_src),
74 key->ipv4_dst | (get_16aligned_be32(&nh->ip_dst) & ~mask->ipv4_dst),
75 key->ipv4_tos | (nh->ip_tos & ~mask->ipv4_tos),
76 key->ipv4_ttl | (nh->ip_ttl & ~mask->ipv4_ttl));
79 static const ovs_be32 *
80 mask_ipv6_addr(const ovs_16aligned_be32 *old, const ovs_be32 *addr,
81 const ovs_be32 *mask, ovs_be32 *masked)
83 for (int i = 0; i < 4; i++) {
84 masked[i] = addr[i] | (get_16aligned_be32(&old[i]) & ~mask[i]);
91 odp_set_ipv6(struct ofpbuf *packet, const struct ovs_key_ipv6 *key,
92 const struct ovs_key_ipv6 *mask)
94 struct ovs_16aligned_ip6_hdr *nh = ofpbuf_l3(packet);
95 ovs_be32 sbuf[4], dbuf[4];
96 uint8_t old_tc = ntohl(get_16aligned_be32(&nh->ip6_flow)) >> 20;
97 ovs_be32 old_fl = get_16aligned_be32(&nh->ip6_flow) & htonl(0xfffff);
102 mask_ipv6_addr(nh->ip6_src.be32, key->ipv6_src, mask->ipv6_src, sbuf),
103 mask_ipv6_addr(nh->ip6_dst.be32, key->ipv6_dst, mask->ipv6_dst, dbuf),
104 key->ipv6_tclass | (old_tc & ~mask->ipv6_tclass),
105 key->ipv6_label | (old_fl & ~mask->ipv6_label),
106 key->ipv6_hlimit | (nh->ip6_hlim & ~mask->ipv6_hlimit));
110 odp_set_tcp(struct ofpbuf *packet, const struct ovs_key_tcp *key,
111 const struct ovs_key_tcp *mask)
113 struct tcp_header *th = ofpbuf_l4(packet);
115 if (OVS_LIKELY(th && ofpbuf_get_tcp_payload(packet))) {
116 packet_set_tcp_port(packet,
117 key->tcp_src | (th->tcp_src & ~mask->tcp_src),
118 key->tcp_dst | (th->tcp_dst & ~mask->tcp_dst));
123 odp_set_udp(struct ofpbuf *packet, const struct ovs_key_udp *key,
124 const struct ovs_key_udp *mask)
126 struct udp_header *uh = ofpbuf_l4(packet);
128 if (OVS_LIKELY(uh && ofpbuf_get_udp_payload(packet))) {
129 packet_set_udp_port(packet,
130 key->udp_src | (uh->udp_src & ~mask->udp_src),
131 key->udp_dst | (uh->udp_dst & ~mask->udp_dst));
136 odp_set_sctp(struct ofpbuf *packet, const struct ovs_key_sctp *key,
137 const struct ovs_key_sctp *mask)
139 struct sctp_header *sh = ofpbuf_l4(packet);
141 if (OVS_LIKELY(sh && ofpbuf_get_sctp_payload(packet))) {
142 packet_set_sctp_port(packet,
143 key->sctp_src | (sh->sctp_src & ~mask->sctp_src),
144 key->sctp_dst | (sh->sctp_dst & ~mask->sctp_dst));
149 odp_set_tunnel_action(const struct nlattr *a, struct flow_tnl *tun_key)
151 enum odp_key_fitness fitness;
153 fitness = odp_tun_key_from_attr(a, tun_key);
154 ovs_assert(fitness != ODP_FIT_ERROR);
158 set_arp(struct ofpbuf *packet, const struct ovs_key_arp *key,
159 const struct ovs_key_arp *mask)
161 struct arp_eth_header *arp = ofpbuf_l3(packet);
164 arp->ar_op = key->arp_op;
165 memcpy(arp->ar_sha, key->arp_sha, ETH_ADDR_LEN);
166 put_16aligned_be32(&arp->ar_spa, key->arp_sip);
167 memcpy(arp->ar_tha, key->arp_tha, ETH_ADDR_LEN);
168 put_16aligned_be32(&arp->ar_tpa, key->arp_tip);
170 ovs_be32 ar_spa = get_16aligned_be32(&arp->ar_spa);
171 ovs_be32 ar_tpa = get_16aligned_be32(&arp->ar_tpa);
173 arp->ar_op = key->arp_op | (arp->ar_op & ~mask->arp_op);
174 ether_addr_copy_masked(arp->ar_sha, key->arp_sha, mask->arp_sha);
175 put_16aligned_be32(&arp->ar_spa,
176 key->arp_sip | (ar_spa & ~mask->arp_sip));
177 ether_addr_copy_masked(arp->ar_tha, key->arp_tha, mask->arp_tha);
178 put_16aligned_be32(&arp->ar_tpa,
179 key->arp_tip | (ar_tpa & ~mask->arp_tip));
184 odp_execute_set_action(struct dpif_packet *packet, const struct nlattr *a)
186 enum ovs_key_attr type = nl_attr_type(a);
187 const struct ovs_key_ipv4 *ipv4_key;
188 const struct ovs_key_ipv6 *ipv6_key;
189 struct pkt_metadata *md = &packet->md;
192 case OVS_KEY_ATTR_PRIORITY:
193 md->skb_priority = nl_attr_get_u32(a);
196 case OVS_KEY_ATTR_TUNNEL:
197 odp_set_tunnel_action(a, &md->tunnel);
200 case OVS_KEY_ATTR_SKB_MARK:
201 md->pkt_mark = nl_attr_get_u32(a);
204 case OVS_KEY_ATTR_ETHERNET:
205 odp_eth_set_addrs(&packet->ofpbuf, nl_attr_get(a), NULL);
208 case OVS_KEY_ATTR_IPV4:
209 ipv4_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv4));
210 packet_set_ipv4(&packet->ofpbuf, ipv4_key->ipv4_src,
211 ipv4_key->ipv4_dst, ipv4_key->ipv4_tos,
215 case OVS_KEY_ATTR_IPV6:
216 ipv6_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv6));
217 packet_set_ipv6(&packet->ofpbuf, ipv6_key->ipv6_proto,
218 ipv6_key->ipv6_src, ipv6_key->ipv6_dst,
219 ipv6_key->ipv6_tclass, ipv6_key->ipv6_label,
220 ipv6_key->ipv6_hlimit);
223 case OVS_KEY_ATTR_TCP:
224 if (OVS_LIKELY(ofpbuf_get_tcp_payload(&packet->ofpbuf))) {
225 const struct ovs_key_tcp *tcp_key
226 = nl_attr_get_unspec(a, sizeof(struct ovs_key_tcp));
228 packet_set_tcp_port(&packet->ofpbuf, tcp_key->tcp_src,
233 case OVS_KEY_ATTR_UDP:
234 if (OVS_LIKELY(ofpbuf_get_udp_payload(&packet->ofpbuf))) {
235 const struct ovs_key_udp *udp_key
236 = nl_attr_get_unspec(a, sizeof(struct ovs_key_udp));
238 packet_set_udp_port(&packet->ofpbuf, udp_key->udp_src,
243 case OVS_KEY_ATTR_SCTP:
244 if (OVS_LIKELY(ofpbuf_get_sctp_payload(&packet->ofpbuf))) {
245 const struct ovs_key_sctp *sctp_key
246 = nl_attr_get_unspec(a, sizeof(struct ovs_key_sctp));
248 packet_set_sctp_port(&packet->ofpbuf, sctp_key->sctp_src,
253 case OVS_KEY_ATTR_MPLS:
254 set_mpls_lse(&packet->ofpbuf, nl_attr_get_be32(a));
257 case OVS_KEY_ATTR_ARP:
258 set_arp(&packet->ofpbuf, nl_attr_get(a), NULL);
261 case OVS_KEY_ATTR_DP_HASH:
262 md->dp_hash = nl_attr_get_u32(a);
263 dpif_packet_set_dp_hash(packet, md->dp_hash);
266 case OVS_KEY_ATTR_RECIRC_ID:
267 md->recirc_id = nl_attr_get_u32(a);
270 case OVS_KEY_ATTR_UNSPEC:
271 case OVS_KEY_ATTR_ENCAP:
272 case OVS_KEY_ATTR_ETHERTYPE:
273 case OVS_KEY_ATTR_IN_PORT:
274 case OVS_KEY_ATTR_VLAN:
275 case OVS_KEY_ATTR_ICMP:
276 case OVS_KEY_ATTR_ICMPV6:
277 case OVS_KEY_ATTR_ND:
278 case OVS_KEY_ATTR_TCP_FLAGS:
279 case __OVS_KEY_ATTR_MAX:
285 #define get_mask(a, type) ((const type *)(const void *)(a + 1) + 1)
288 odp_execute_masked_set_action(struct dpif_packet *packet,
289 const struct nlattr *a)
291 struct pkt_metadata *md = &packet->md;
292 enum ovs_key_attr type = nl_attr_type(a);
296 case OVS_KEY_ATTR_PRIORITY:
297 md->skb_priority = nl_attr_get_u32(a)
298 | (md->skb_priority & ~*get_mask(a, uint32_t));
301 case OVS_KEY_ATTR_SKB_MARK:
302 md->pkt_mark = nl_attr_get_u32(a)
303 | (md->pkt_mark & ~*get_mask(a, uint32_t));
306 case OVS_KEY_ATTR_ETHERNET:
307 odp_eth_set_addrs(&packet->ofpbuf, nl_attr_get(a),
308 get_mask(a, struct ovs_key_ethernet));
311 case OVS_KEY_ATTR_IPV4:
312 odp_set_ipv4(&packet->ofpbuf, nl_attr_get(a),
313 get_mask(a, struct ovs_key_ipv4));
316 case OVS_KEY_ATTR_IPV6:
317 odp_set_ipv6(&packet->ofpbuf, nl_attr_get(a),
318 get_mask(a, struct ovs_key_ipv6));
321 case OVS_KEY_ATTR_TCP:
322 odp_set_tcp(&packet->ofpbuf, nl_attr_get(a),
323 get_mask(a, struct ovs_key_tcp));
326 case OVS_KEY_ATTR_UDP:
327 odp_set_udp(&packet->ofpbuf, nl_attr_get(a),
328 get_mask(a, struct ovs_key_udp));
331 case OVS_KEY_ATTR_SCTP:
332 odp_set_sctp(&packet->ofpbuf, nl_attr_get(a),
333 get_mask(a, struct ovs_key_sctp));
336 case OVS_KEY_ATTR_MPLS:
337 mh = ofpbuf_l2_5(&packet->ofpbuf);
339 put_16aligned_be32(&mh->mpls_lse, nl_attr_get_be32(a)
340 | (get_16aligned_be32(&mh->mpls_lse)
341 & ~*get_mask(a, ovs_be32)));
345 case OVS_KEY_ATTR_ARP:
346 set_arp(&packet->ofpbuf, nl_attr_get(a),
347 get_mask(a, struct ovs_key_arp));
350 case OVS_KEY_ATTR_DP_HASH:
351 md->dp_hash = nl_attr_get_u32(a)
352 | (dpif_packet_get_dp_hash(packet) & ~*get_mask(a, uint32_t));
353 dpif_packet_set_dp_hash(packet, md->dp_hash);
356 case OVS_KEY_ATTR_RECIRC_ID:
357 md->recirc_id = nl_attr_get_u32(a)
358 | (md->recirc_id & ~*get_mask(a, uint32_t));
361 case OVS_KEY_ATTR_TUNNEL: /* Masked data not supported for tunnel. */
362 case OVS_KEY_ATTR_UNSPEC:
363 case OVS_KEY_ATTR_ENCAP:
364 case OVS_KEY_ATTR_ETHERTYPE:
365 case OVS_KEY_ATTR_IN_PORT:
366 case OVS_KEY_ATTR_VLAN:
367 case OVS_KEY_ATTR_ICMP:
368 case OVS_KEY_ATTR_ICMPV6:
369 case OVS_KEY_ATTR_ND:
370 case OVS_KEY_ATTR_TCP_FLAGS:
371 case __OVS_KEY_ATTR_MAX:
378 odp_execute_sample(void *dp, struct dpif_packet *packet, bool steal,
379 const struct nlattr *action,
380 odp_execute_cb dp_execute_action)
382 const struct nlattr *subactions = NULL;
383 const struct nlattr *a;
386 NL_NESTED_FOR_EACH_UNSAFE (a, left, action) {
387 int type = nl_attr_type(a);
389 switch ((enum ovs_sample_attr) type) {
390 case OVS_SAMPLE_ATTR_PROBABILITY:
391 if (random_uint32() >= nl_attr_get_u32(a)) {
393 dpif_packet_delete(packet);
399 case OVS_SAMPLE_ATTR_ACTIONS:
403 case OVS_SAMPLE_ATTR_UNSPEC:
404 case __OVS_SAMPLE_ATTR_MAX:
410 odp_execute_actions(dp, &packet, 1, steal, nl_attr_get(subactions),
411 nl_attr_get_size(subactions), dp_execute_action);
415 odp_execute_actions(void *dp, struct dpif_packet **packets, int cnt, bool steal,
416 const struct nlattr *actions, size_t actions_len,
417 odp_execute_cb dp_execute_action)
419 const struct nlattr *a;
423 NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) {
424 int type = nl_attr_type(a);
425 bool last_action = (left <= NLA_ALIGN(a->nla_len));
427 switch ((enum ovs_action_attr) type) {
428 /* These only make sense in the context of a datapath. */
429 case OVS_ACTION_ATTR_OUTPUT:
430 case OVS_ACTION_ATTR_TUNNEL_PUSH:
431 case OVS_ACTION_ATTR_TUNNEL_POP:
432 case OVS_ACTION_ATTR_USERSPACE:
433 case OVS_ACTION_ATTR_RECIRC:
434 if (dp_execute_action) {
435 /* Allow 'dp_execute_action' to steal the packet data if we do
436 * not need it any more. */
437 bool may_steal = steal && last_action;
439 dp_execute_action(dp, packets, cnt, a, may_steal);
442 /* We do not need to free the packets. dp_execute_actions()
449 case OVS_ACTION_ATTR_HASH: {
450 const struct ovs_action_hash *hash_act = nl_attr_get(a);
452 /* Calculate a hash value directly. This might not match the
453 * value computed by the datapath, but it is much less expensive,
454 * and the current use case (bonding) does not require a strict
455 * match to work properly. */
456 if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
460 for (i = 0; i < cnt; i++) {
461 flow_extract(&packets[i]->ofpbuf, &packets[i]->md, &flow);
462 hash = flow_hash_5tuple(&flow, hash_act->hash_basis);
464 /* We also store the hash value with each packet */
465 dpif_packet_set_dp_hash(packets[i], hash ? hash : 1);
468 /* Assert on unknown hash algorithm. */
474 case OVS_ACTION_ATTR_PUSH_VLAN: {
475 const struct ovs_action_push_vlan *vlan = nl_attr_get(a);
477 for (i = 0; i < cnt; i++) {
478 struct ofpbuf *buf = &packets[i]->ofpbuf;
480 eth_push_vlan(buf, htons(ETH_TYPE_VLAN), vlan->vlan_tci);
485 case OVS_ACTION_ATTR_POP_VLAN:
486 for (i = 0; i < cnt; i++) {
487 struct ofpbuf *buf = &packets[i]->ofpbuf;
493 case OVS_ACTION_ATTR_PUSH_MPLS: {
494 const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
496 for (i = 0; i < cnt; i++) {
497 struct ofpbuf *buf = &packets[i]->ofpbuf;
499 push_mpls(buf, mpls->mpls_ethertype, mpls->mpls_lse);
504 case OVS_ACTION_ATTR_POP_MPLS:
505 for (i = 0; i < cnt; i++) {
506 struct ofpbuf *buf = &packets[i]->ofpbuf;
508 pop_mpls(buf, nl_attr_get_be16(a));
512 case OVS_ACTION_ATTR_SET:
513 for (i = 0; i < cnt; i++) {
514 odp_execute_set_action(packets[i], nl_attr_get(a));
518 case OVS_ACTION_ATTR_SET_MASKED:
519 for (i = 0; i < cnt; i++) {
520 odp_execute_masked_set_action(packets[i], nl_attr_get(a));
524 case OVS_ACTION_ATTR_SAMPLE:
525 for (i = 0; i < cnt; i++) {
526 odp_execute_sample(dp, packets[i], steal && last_action, a,
531 /* We do not need to free the packets. odp_execute_sample() has
537 case OVS_ACTION_ATTR_UNSPEC:
538 case __OVS_ACTION_ATTR_MAX:
544 for (i = 0; i < cnt; i++) {
545 dpif_packet_delete(packets[i]);