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f094af7b | 1 | /* |
e60e935b | 2 | * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc. |
f094af7b SH |
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" | |
6d670e7f | 20 | #include <arpa/inet.h> |
1368af0c | 21 | #include <netinet/in.h> |
e60e935b | 22 | #include <netinet/icmp6.h> |
6d670e7f | 23 | #include <netinet/ip6.h> |
f094af7b SH |
24 | #include <stdlib.h> |
25 | #include <string.h> | |
26 | ||
e14deea0 | 27 | #include "dp-packet.h" |
758c456d | 28 | #include "dpif.h" |
f094af7b | 29 | #include "netlink.h" |
837eefc7 | 30 | #include "odp-netlink.h" |
6c13071b | 31 | #include "odp-util.h" |
f094af7b | 32 | #include "packets.h" |
c6bf49f3 | 33 | #include "flow.h" |
f6c8a6b1 | 34 | #include "unaligned.h" |
f094af7b SH |
35 | #include "util.h" |
36 | ||
6d670e7f | 37 | /* Masked copy of an ethernet address. 'src' is already properly masked. */ |
f094af7b | 38 | static void |
74ff3298 JR |
39 | ether_addr_copy_masked(struct eth_addr *dst, const struct eth_addr src, |
40 | const struct eth_addr mask) | |
6d670e7f JR |
41 | { |
42 | int i; | |
43 | ||
74ff3298 JR |
44 | for (i = 0; i < ARRAY_SIZE(dst->be16); i++) { |
45 | dst->be16[i] = src.be16[i] | (dst->be16[i] & ~mask.be16[i]); | |
6d670e7f JR |
46 | } |
47 | } | |
48 | ||
49 | static void | |
cf62fa4c | 50 | odp_eth_set_addrs(struct dp_packet *packet, const struct ovs_key_ethernet *key, |
6d670e7f | 51 | const struct ovs_key_ethernet *mask) |
f094af7b | 52 | { |
cf62fa4c | 53 | struct eth_header *eh = dp_packet_l2(packet); |
f094af7b | 54 | |
cf3b7538 | 55 | if (eh) { |
6d670e7f | 56 | if (!mask) { |
74ff3298 JR |
57 | eh->eth_src = key->eth_src; |
58 | eh->eth_dst = key->eth_dst; | |
6d670e7f | 59 | } else { |
74ff3298 JR |
60 | ether_addr_copy_masked(&eh->eth_src, key->eth_src, mask->eth_src); |
61 | ether_addr_copy_masked(&eh->eth_dst, key->eth_dst, mask->eth_dst); | |
6d670e7f | 62 | } |
cf3b7538 | 63 | } |
f094af7b SH |
64 | } |
65 | ||
6d670e7f | 66 | static void |
cf62fa4c | 67 | odp_set_ipv4(struct dp_packet *packet, const struct ovs_key_ipv4 *key, |
6d670e7f JR |
68 | const struct ovs_key_ipv4 *mask) |
69 | { | |
cf62fa4c | 70 | struct ip_header *nh = dp_packet_l3(packet); |
6d670e7f JR |
71 | |
72 | packet_set_ipv4( | |
73 | packet, | |
74 | key->ipv4_src | (get_16aligned_be32(&nh->ip_src) & ~mask->ipv4_src), | |
75 | key->ipv4_dst | (get_16aligned_be32(&nh->ip_dst) & ~mask->ipv4_dst), | |
76 | key->ipv4_tos | (nh->ip_tos & ~mask->ipv4_tos), | |
77 | key->ipv4_ttl | (nh->ip_ttl & ~mask->ipv4_ttl)); | |
78 | } | |
79 | ||
80 | static const ovs_be32 * | |
81 | mask_ipv6_addr(const ovs_16aligned_be32 *old, const ovs_be32 *addr, | |
82 | const ovs_be32 *mask, ovs_be32 *masked) | |
83 | { | |
84 | for (int i = 0; i < 4; i++) { | |
85 | masked[i] = addr[i] | (get_16aligned_be32(&old[i]) & ~mask[i]); | |
86 | } | |
87 | ||
88 | return masked; | |
89 | } | |
90 | ||
91 | static void | |
cf62fa4c | 92 | odp_set_ipv6(struct dp_packet *packet, const struct ovs_key_ipv6 *key, |
6d670e7f JR |
93 | const struct ovs_key_ipv6 *mask) |
94 | { | |
cf62fa4c | 95 | struct ovs_16aligned_ip6_hdr *nh = dp_packet_l3(packet); |
6d670e7f JR |
96 | ovs_be32 sbuf[4], dbuf[4]; |
97 | uint8_t old_tc = ntohl(get_16aligned_be32(&nh->ip6_flow)) >> 20; | |
98 | ovs_be32 old_fl = get_16aligned_be32(&nh->ip6_flow) & htonl(0xfffff); | |
99 | ||
100 | packet_set_ipv6( | |
101 | packet, | |
102 | key->ipv6_proto, | |
103 | mask_ipv6_addr(nh->ip6_src.be32, key->ipv6_src, mask->ipv6_src, sbuf), | |
104 | mask_ipv6_addr(nh->ip6_dst.be32, key->ipv6_dst, mask->ipv6_dst, dbuf), | |
105 | key->ipv6_tclass | (old_tc & ~mask->ipv6_tclass), | |
106 | key->ipv6_label | (old_fl & ~mask->ipv6_label), | |
107 | key->ipv6_hlimit | (nh->ip6_hlim & ~mask->ipv6_hlimit)); | |
108 | } | |
109 | ||
110 | static void | |
cf62fa4c | 111 | odp_set_tcp(struct dp_packet *packet, const struct ovs_key_tcp *key, |
6d670e7f JR |
112 | const struct ovs_key_tcp *mask) |
113 | { | |
cf62fa4c | 114 | struct tcp_header *th = dp_packet_l4(packet); |
6d670e7f | 115 | |
cf62fa4c | 116 | if (OVS_LIKELY(th && dp_packet_get_tcp_payload(packet))) { |
b8778a0d JR |
117 | packet_set_tcp_port(packet, |
118 | key->tcp_src | (th->tcp_src & ~mask->tcp_src), | |
119 | key->tcp_dst | (th->tcp_dst & ~mask->tcp_dst)); | |
120 | } | |
6d670e7f JR |
121 | } |
122 | ||
123 | static void | |
cf62fa4c | 124 | odp_set_udp(struct dp_packet *packet, const struct ovs_key_udp *key, |
6d670e7f JR |
125 | const struct ovs_key_udp *mask) |
126 | { | |
cf62fa4c | 127 | struct udp_header *uh = dp_packet_l4(packet); |
6d670e7f | 128 | |
cf62fa4c | 129 | if (OVS_LIKELY(uh && dp_packet_get_udp_payload(packet))) { |
b8778a0d JR |
130 | packet_set_udp_port(packet, |
131 | key->udp_src | (uh->udp_src & ~mask->udp_src), | |
132 | key->udp_dst | (uh->udp_dst & ~mask->udp_dst)); | |
133 | } | |
6d670e7f JR |
134 | } |
135 | ||
136 | static void | |
cf62fa4c | 137 | odp_set_sctp(struct dp_packet *packet, const struct ovs_key_sctp *key, |
6d670e7f JR |
138 | const struct ovs_key_sctp *mask) |
139 | { | |
cf62fa4c | 140 | struct sctp_header *sh = dp_packet_l4(packet); |
6d670e7f | 141 | |
cf62fa4c | 142 | if (OVS_LIKELY(sh && dp_packet_get_sctp_payload(packet))) { |
b8778a0d JR |
143 | packet_set_sctp_port(packet, |
144 | key->sctp_src | (sh->sctp_src & ~mask->sctp_src), | |
145 | key->sctp_dst | (sh->sctp_dst & ~mask->sctp_dst)); | |
146 | } | |
6d670e7f JR |
147 | } |
148 | ||
f094af7b | 149 | static void |
6c13071b SH |
150 | odp_set_tunnel_action(const struct nlattr *a, struct flow_tnl *tun_key) |
151 | { | |
152 | enum odp_key_fitness fitness; | |
153 | ||
6728d578 | 154 | fitness = odp_tun_key_from_attr(a, true, tun_key); |
6c13071b SH |
155 | ovs_assert(fitness != ODP_FIT_ERROR); |
156 | } | |
157 | ||
f6c8a6b1 | 158 | static void |
cf62fa4c | 159 | set_arp(struct dp_packet *packet, const struct ovs_key_arp *key, |
6d670e7f | 160 | const struct ovs_key_arp *mask) |
f6c8a6b1 | 161 | { |
cf62fa4c | 162 | struct arp_eth_header *arp = dp_packet_l3(packet); |
f6c8a6b1 | 163 | |
6d670e7f JR |
164 | if (!mask) { |
165 | arp->ar_op = key->arp_op; | |
74ff3298 | 166 | arp->ar_sha = key->arp_sha; |
6d670e7f | 167 | put_16aligned_be32(&arp->ar_spa, key->arp_sip); |
74ff3298 | 168 | arp->ar_tha = key->arp_tha; |
6d670e7f JR |
169 | put_16aligned_be32(&arp->ar_tpa, key->arp_tip); |
170 | } else { | |
171 | ovs_be32 ar_spa = get_16aligned_be32(&arp->ar_spa); | |
172 | ovs_be32 ar_tpa = get_16aligned_be32(&arp->ar_tpa); | |
173 | ||
174 | arp->ar_op = key->arp_op | (arp->ar_op & ~mask->arp_op); | |
74ff3298 | 175 | ether_addr_copy_masked(&arp->ar_sha, key->arp_sha, mask->arp_sha); |
6d670e7f JR |
176 | put_16aligned_be32(&arp->ar_spa, |
177 | key->arp_sip | (ar_spa & ~mask->arp_sip)); | |
74ff3298 | 178 | ether_addr_copy_masked(&arp->ar_tha, key->arp_tha, mask->arp_tha); |
6d670e7f JR |
179 | put_16aligned_be32(&arp->ar_tpa, |
180 | key->arp_tip | (ar_tpa & ~mask->arp_tip)); | |
181 | } | |
f6c8a6b1 BP |
182 | } |
183 | ||
e60e935b | 184 | static void |
cf62fa4c | 185 | odp_set_nd(struct dp_packet *packet, const struct ovs_key_nd *key, |
e60e935b SRCSA |
186 | const struct ovs_key_nd *mask) |
187 | { | |
cf62fa4c PS |
188 | const struct ovs_nd_msg *ns = dp_packet_l4(packet); |
189 | const struct ovs_nd_opt *nd_opt = dp_packet_get_nd_payload(packet); | |
e60e935b SRCSA |
190 | |
191 | if (OVS_LIKELY(ns && nd_opt)) { | |
cf62fa4c | 192 | int bytes_remain = dp_packet_l4_size(packet) - sizeof(*ns); |
e60e935b | 193 | ovs_be32 tgt_buf[4]; |
74ff3298 JR |
194 | struct eth_addr sll_buf = eth_addr_zero; |
195 | struct eth_addr tll_buf = eth_addr_zero; | |
e60e935b SRCSA |
196 | |
197 | while (bytes_remain >= ND_OPT_LEN && nd_opt->nd_opt_len != 0) { | |
198 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LINKADDR | |
199 | && nd_opt->nd_opt_len == 1) { | |
74ff3298 JR |
200 | sll_buf = nd_opt->nd_opt_mac; |
201 | ether_addr_copy_masked(&sll_buf, key->nd_sll, mask->nd_sll); | |
e60e935b SRCSA |
202 | |
203 | /* A packet can only contain one SLL or TLL option */ | |
204 | break; | |
205 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LINKADDR | |
206 | && nd_opt->nd_opt_len == 1) { | |
74ff3298 JR |
207 | tll_buf = nd_opt->nd_opt_mac; |
208 | ether_addr_copy_masked(&tll_buf, key->nd_tll, mask->nd_tll); | |
e60e935b SRCSA |
209 | |
210 | /* A packet can only contain one SLL or TLL option */ | |
211 | break; | |
212 | } | |
213 | ||
214 | nd_opt += nd_opt->nd_opt_len; | |
215 | bytes_remain -= nd_opt->nd_opt_len * ND_OPT_LEN; | |
216 | } | |
217 | ||
218 | packet_set_nd(packet, | |
219 | mask_ipv6_addr(ns->target.be32, | |
220 | key->nd_target, mask->nd_target, tgt_buf), | |
221 | sll_buf, | |
222 | tll_buf); | |
223 | } | |
224 | } | |
225 | ||
6c13071b | 226 | static void |
e14deea0 | 227 | odp_execute_set_action(struct dp_packet *packet, const struct nlattr *a) |
f094af7b SH |
228 | { |
229 | enum ovs_key_attr type = nl_attr_type(a); | |
230 | const struct ovs_key_ipv4 *ipv4_key; | |
231 | const struct ovs_key_ipv6 *ipv6_key; | |
41ccaa24 | 232 | struct pkt_metadata *md = &packet->md; |
f094af7b SH |
233 | |
234 | switch (type) { | |
235 | case OVS_KEY_ATTR_PRIORITY: | |
09f9da0b | 236 | md->skb_priority = nl_attr_get_u32(a); |
6c13071b SH |
237 | break; |
238 | ||
f094af7b | 239 | case OVS_KEY_ATTR_TUNNEL: |
09f9da0b | 240 | odp_set_tunnel_action(a, &md->tunnel); |
6c13071b SH |
241 | break; |
242 | ||
f094af7b | 243 | case OVS_KEY_ATTR_SKB_MARK: |
09f9da0b | 244 | md->pkt_mark = nl_attr_get_u32(a); |
f094af7b SH |
245 | break; |
246 | ||
247 | case OVS_KEY_ATTR_ETHERNET: | |
cf62fa4c | 248 | odp_eth_set_addrs(packet, nl_attr_get(a), NULL); |
f094af7b SH |
249 | break; |
250 | ||
251 | case OVS_KEY_ATTR_IPV4: | |
252 | ipv4_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv4)); | |
cf62fa4c | 253 | packet_set_ipv4(packet, ipv4_key->ipv4_src, |
91088554 DDP |
254 | ipv4_key->ipv4_dst, ipv4_key->ipv4_tos, |
255 | ipv4_key->ipv4_ttl); | |
f094af7b SH |
256 | break; |
257 | ||
258 | case OVS_KEY_ATTR_IPV6: | |
259 | ipv6_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv6)); | |
cf62fa4c | 260 | packet_set_ipv6(packet, ipv6_key->ipv6_proto, |
91088554 DDP |
261 | ipv6_key->ipv6_src, ipv6_key->ipv6_dst, |
262 | ipv6_key->ipv6_tclass, ipv6_key->ipv6_label, | |
263 | ipv6_key->ipv6_hlimit); | |
f094af7b SH |
264 | break; |
265 | ||
266 | case OVS_KEY_ATTR_TCP: | |
cf62fa4c | 267 | if (OVS_LIKELY(dp_packet_get_tcp_payload(packet))) { |
b8778a0d JR |
268 | const struct ovs_key_tcp *tcp_key |
269 | = nl_attr_get_unspec(a, sizeof(struct ovs_key_tcp)); | |
270 | ||
cf62fa4c | 271 | packet_set_tcp_port(packet, tcp_key->tcp_src, |
b8778a0d JR |
272 | tcp_key->tcp_dst); |
273 | } | |
f094af7b SH |
274 | break; |
275 | ||
2b06df54 | 276 | case OVS_KEY_ATTR_UDP: |
cf62fa4c | 277 | if (OVS_LIKELY(dp_packet_get_udp_payload(packet))) { |
b8778a0d JR |
278 | const struct ovs_key_udp *udp_key |
279 | = nl_attr_get_unspec(a, sizeof(struct ovs_key_udp)); | |
280 | ||
cf62fa4c | 281 | packet_set_udp_port(packet, udp_key->udp_src, |
b8778a0d JR |
282 | udp_key->udp_dst); |
283 | } | |
f094af7b SH |
284 | break; |
285 | ||
c6bcb685 | 286 | case OVS_KEY_ATTR_SCTP: |
cf62fa4c | 287 | if (OVS_LIKELY(dp_packet_get_sctp_payload(packet))) { |
b8778a0d JR |
288 | const struct ovs_key_sctp *sctp_key |
289 | = nl_attr_get_unspec(a, sizeof(struct ovs_key_sctp)); | |
290 | ||
cf62fa4c | 291 | packet_set_sctp_port(packet, sctp_key->sctp_src, |
b8778a0d JR |
292 | sctp_key->sctp_dst); |
293 | } | |
c6bcb685 JS |
294 | break; |
295 | ||
2b06df54 | 296 | case OVS_KEY_ATTR_MPLS: |
cf62fa4c | 297 | set_mpls_lse(packet, nl_attr_get_be32(a)); |
6d670e7f | 298 | break; |
f094af7b | 299 | |
f6c8a6b1 | 300 | case OVS_KEY_ATTR_ARP: |
cf62fa4c | 301 | set_arp(packet, nl_attr_get(a), NULL); |
f6c8a6b1 BP |
302 | break; |
303 | ||
e60e935b | 304 | case OVS_KEY_ATTR_ND: |
cf62fa4c | 305 | if (OVS_LIKELY(dp_packet_get_nd_payload(packet))) { |
e60e935b SRCSA |
306 | const struct ovs_key_nd *nd_key |
307 | = nl_attr_get_unspec(a, sizeof(struct ovs_key_nd)); | |
74ff3298 JR |
308 | packet_set_nd(packet, nd_key->nd_target, nd_key->nd_sll, |
309 | nd_key->nd_tll); | |
e60e935b SRCSA |
310 | } |
311 | break; | |
312 | ||
572f732a | 313 | case OVS_KEY_ATTR_DP_HASH: |
61a2647e | 314 | md->dp_hash = nl_attr_get_u32(a); |
572f732a AZ |
315 | break; |
316 | ||
317 | case OVS_KEY_ATTR_RECIRC_ID: | |
318 | md->recirc_id = nl_attr_get_u32(a); | |
319 | break; | |
320 | ||
2b06df54 JS |
321 | case OVS_KEY_ATTR_UNSPEC: |
322 | case OVS_KEY_ATTR_ENCAP: | |
323 | case OVS_KEY_ATTR_ETHERTYPE: | |
324 | case OVS_KEY_ATTR_IN_PORT: | |
325 | case OVS_KEY_ATTR_VLAN: | |
326 | case OVS_KEY_ATTR_ICMP: | |
327 | case OVS_KEY_ATTR_ICMPV6: | |
dc235f7f | 328 | case OVS_KEY_ATTR_TCP_FLAGS: |
2b06df54 JS |
329 | case __OVS_KEY_ATTR_MAX: |
330 | default: | |
428b2edd | 331 | OVS_NOT_REACHED(); |
f094af7b SH |
332 | } |
333 | } | |
334 | ||
6d670e7f JR |
335 | #define get_mask(a, type) ((const type *)(const void *)(a + 1) + 1) |
336 | ||
337 | static void | |
e14deea0 | 338 | odp_execute_masked_set_action(struct dp_packet *packet, |
41ccaa24 | 339 | const struct nlattr *a) |
6d670e7f | 340 | { |
41ccaa24 | 341 | struct pkt_metadata *md = &packet->md; |
6d670e7f JR |
342 | enum ovs_key_attr type = nl_attr_type(a); |
343 | struct mpls_hdr *mh; | |
344 | ||
345 | switch (type) { | |
346 | case OVS_KEY_ATTR_PRIORITY: | |
347 | md->skb_priority = nl_attr_get_u32(a) | |
348 | | (md->skb_priority & ~*get_mask(a, uint32_t)); | |
349 | break; | |
350 | ||
351 | case OVS_KEY_ATTR_SKB_MARK: | |
352 | md->pkt_mark = nl_attr_get_u32(a) | |
353 | | (md->pkt_mark & ~*get_mask(a, uint32_t)); | |
354 | break; | |
355 | ||
356 | case OVS_KEY_ATTR_ETHERNET: | |
cf62fa4c | 357 | odp_eth_set_addrs(packet, nl_attr_get(a), |
6d670e7f JR |
358 | get_mask(a, struct ovs_key_ethernet)); |
359 | break; | |
360 | ||
361 | case OVS_KEY_ATTR_IPV4: | |
cf62fa4c | 362 | odp_set_ipv4(packet, nl_attr_get(a), |
6d670e7f JR |
363 | get_mask(a, struct ovs_key_ipv4)); |
364 | break; | |
365 | ||
366 | case OVS_KEY_ATTR_IPV6: | |
cf62fa4c | 367 | odp_set_ipv6(packet, nl_attr_get(a), |
6d670e7f JR |
368 | get_mask(a, struct ovs_key_ipv6)); |
369 | break; | |
370 | ||
371 | case OVS_KEY_ATTR_TCP: | |
cf62fa4c | 372 | odp_set_tcp(packet, nl_attr_get(a), |
6d670e7f JR |
373 | get_mask(a, struct ovs_key_tcp)); |
374 | break; | |
375 | ||
376 | case OVS_KEY_ATTR_UDP: | |
cf62fa4c | 377 | odp_set_udp(packet, nl_attr_get(a), |
6d670e7f JR |
378 | get_mask(a, struct ovs_key_udp)); |
379 | break; | |
380 | ||
381 | case OVS_KEY_ATTR_SCTP: | |
cf62fa4c | 382 | odp_set_sctp(packet, nl_attr_get(a), |
6d670e7f JR |
383 | get_mask(a, struct ovs_key_sctp)); |
384 | break; | |
385 | ||
386 | case OVS_KEY_ATTR_MPLS: | |
cf62fa4c | 387 | mh = dp_packet_l2_5(packet); |
6d670e7f JR |
388 | if (mh) { |
389 | put_16aligned_be32(&mh->mpls_lse, nl_attr_get_be32(a) | |
390 | | (get_16aligned_be32(&mh->mpls_lse) | |
391 | & ~*get_mask(a, ovs_be32))); | |
392 | } | |
393 | break; | |
394 | ||
395 | case OVS_KEY_ATTR_ARP: | |
cf62fa4c | 396 | set_arp(packet, nl_attr_get(a), |
6d670e7f JR |
397 | get_mask(a, struct ovs_key_arp)); |
398 | break; | |
399 | ||
e60e935b | 400 | case OVS_KEY_ATTR_ND: |
cf62fa4c | 401 | odp_set_nd(packet, nl_attr_get(a), |
e60e935b SRCSA |
402 | get_mask(a, struct ovs_key_nd)); |
403 | break; | |
404 | ||
6d670e7f | 405 | case OVS_KEY_ATTR_DP_HASH: |
f7c2f97d | 406 | md->dp_hash = nl_attr_get_u32(a) |
2bc1bbd2 | 407 | | (md->dp_hash & ~*get_mask(a, uint32_t)); |
6d670e7f JR |
408 | break; |
409 | ||
410 | case OVS_KEY_ATTR_RECIRC_ID: | |
411 | md->recirc_id = nl_attr_get_u32(a) | |
412 | | (md->recirc_id & ~*get_mask(a, uint32_t)); | |
413 | break; | |
414 | ||
415 | case OVS_KEY_ATTR_TUNNEL: /* Masked data not supported for tunnel. */ | |
416 | case OVS_KEY_ATTR_UNSPEC: | |
417 | case OVS_KEY_ATTR_ENCAP: | |
418 | case OVS_KEY_ATTR_ETHERTYPE: | |
419 | case OVS_KEY_ATTR_IN_PORT: | |
420 | case OVS_KEY_ATTR_VLAN: | |
421 | case OVS_KEY_ATTR_ICMP: | |
422 | case OVS_KEY_ATTR_ICMPV6: | |
6d670e7f JR |
423 | case OVS_KEY_ATTR_TCP_FLAGS: |
424 | case __OVS_KEY_ATTR_MAX: | |
425 | default: | |
426 | OVS_NOT_REACHED(); | |
427 | } | |
428 | } | |
429 | ||
f094af7b | 430 | static void |
e14deea0 | 431 | odp_execute_sample(void *dp, struct dp_packet *packet, bool steal, |
41ccaa24 | 432 | const struct nlattr *action, |
1164afb6 | 433 | odp_execute_cb dp_execute_action) |
f094af7b SH |
434 | { |
435 | const struct nlattr *subactions = NULL; | |
436 | const struct nlattr *a; | |
437 | size_t left; | |
438 | ||
439 | NL_NESTED_FOR_EACH_UNSAFE (a, left, action) { | |
440 | int type = nl_attr_type(a); | |
441 | ||
442 | switch ((enum ovs_sample_attr) type) { | |
443 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
444 | if (random_uint32() >= nl_attr_get_u32(a)) { | |
1164afb6 | 445 | if (steal) { |
e14deea0 | 446 | dp_packet_delete(packet); |
1164afb6 | 447 | } |
f094af7b SH |
448 | return; |
449 | } | |
450 | break; | |
451 | ||
452 | case OVS_SAMPLE_ATTR_ACTIONS: | |
453 | subactions = a; | |
454 | break; | |
455 | ||
456 | case OVS_SAMPLE_ATTR_UNSPEC: | |
457 | case __OVS_SAMPLE_ATTR_MAX: | |
458 | default: | |
428b2edd | 459 | OVS_NOT_REACHED(); |
f094af7b SH |
460 | } |
461 | } | |
462 | ||
41ccaa24 | 463 | odp_execute_actions(dp, &packet, 1, steal, nl_attr_get(subactions), |
1164afb6 | 464 | nl_attr_get_size(subactions), dp_execute_action); |
f094af7b SH |
465 | } |
466 | ||
db8bb9a5 JS |
467 | static bool |
468 | requires_datapath_assistance(const struct nlattr *a) | |
469 | { | |
470 | enum ovs_action_attr type = nl_attr_type(a); | |
471 | ||
472 | switch (type) { | |
473 | /* These only make sense in the context of a datapath. */ | |
474 | case OVS_ACTION_ATTR_OUTPUT: | |
475 | case OVS_ACTION_ATTR_TUNNEL_PUSH: | |
476 | case OVS_ACTION_ATTR_TUNNEL_POP: | |
477 | case OVS_ACTION_ATTR_USERSPACE: | |
478 | case OVS_ACTION_ATTR_RECIRC: | |
479 | return true; | |
480 | ||
481 | case OVS_ACTION_ATTR_SET: | |
482 | case OVS_ACTION_ATTR_SET_MASKED: | |
483 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
484 | case OVS_ACTION_ATTR_POP_VLAN: | |
485 | case OVS_ACTION_ATTR_SAMPLE: | |
486 | case OVS_ACTION_ATTR_HASH: | |
487 | case OVS_ACTION_ATTR_PUSH_MPLS: | |
488 | case OVS_ACTION_ATTR_POP_MPLS: | |
489 | return false; | |
490 | ||
491 | case OVS_ACTION_ATTR_UNSPEC: | |
492 | case __OVS_ACTION_ATTR_MAX: | |
493 | OVS_NOT_REACHED(); | |
494 | } | |
495 | ||
496 | return false; | |
497 | } | |
498 | ||
1164afb6 | 499 | void |
e14deea0 | 500 | odp_execute_actions(void *dp, struct dp_packet **packets, int cnt, bool steal, |
1164afb6 DDP |
501 | const struct nlattr *actions, size_t actions_len, |
502 | odp_execute_cb dp_execute_action) | |
f094af7b SH |
503 | { |
504 | const struct nlattr *a; | |
505 | unsigned int left; | |
8cbf4f47 DDP |
506 | int i; |
507 | ||
f094af7b SH |
508 | NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) { |
509 | int type = nl_attr_type(a); | |
1164afb6 | 510 | bool last_action = (left <= NLA_ALIGN(a->nla_len)); |
f094af7b | 511 | |
db8bb9a5 | 512 | if (requires_datapath_assistance(a)) { |
09f9da0b JR |
513 | if (dp_execute_action) { |
514 | /* Allow 'dp_execute_action' to steal the packet data if we do | |
515 | * not need it any more. */ | |
1164afb6 DDP |
516 | bool may_steal = steal && last_action; |
517 | ||
41ccaa24 | 518 | dp_execute_action(dp, packets, cnt, a, may_steal); |
1164afb6 DDP |
519 | |
520 | if (last_action) { | |
521 | /* We do not need to free the packets. dp_execute_actions() | |
522 | * has stolen them */ | |
523 | return; | |
524 | } | |
c51876c3 | 525 | } |
db8bb9a5 JS |
526 | continue; |
527 | } | |
f094af7b | 528 | |
db8bb9a5 | 529 | switch ((enum ovs_action_attr) type) { |
c6bf49f3 AZ |
530 | case OVS_ACTION_ATTR_HASH: { |
531 | const struct ovs_action_hash *hash_act = nl_attr_get(a); | |
532 | ||
533 | /* Calculate a hash value directly. This might not match the | |
534 | * value computed by the datapath, but it is much less expensive, | |
535 | * and the current use case (bonding) does not require a strict | |
536 | * match to work properly. */ | |
537 | if (hash_act->hash_alg == OVS_HASH_ALG_L4) { | |
538 | struct flow flow; | |
539 | uint32_t hash; | |
540 | ||
8cbf4f47 | 541 | for (i = 0; i < cnt; i++) { |
cf62fa4c | 542 | flow_extract(packets[i], &flow); |
8cbf4f47 DDP |
543 | hash = flow_hash_5tuple(&flow, hash_act->hash_basis); |
544 | ||
2bc1bbd2 | 545 | packets[i]->md.dp_hash = hash; |
8cbf4f47 | 546 | } |
c6bf49f3 AZ |
547 | } else { |
548 | /* Assert on unknown hash algorithm. */ | |
549 | OVS_NOT_REACHED(); | |
550 | } | |
551 | break; | |
552 | } | |
553 | ||
f094af7b SH |
554 | case OVS_ACTION_ATTR_PUSH_VLAN: { |
555 | const struct ovs_action_push_vlan *vlan = nl_attr_get(a); | |
8cbf4f47 DDP |
556 | |
557 | for (i = 0; i < cnt; i++) { | |
d6943394 | 558 | eth_push_vlan(packets[i], vlan->vlan_tpid, vlan->vlan_tci); |
8cbf4f47 | 559 | } |
f094af7b SH |
560 | break; |
561 | } | |
562 | ||
563 | case OVS_ACTION_ATTR_POP_VLAN: | |
8cbf4f47 | 564 | for (i = 0; i < cnt; i++) { |
cf62fa4c | 565 | eth_pop_vlan(packets[i]); |
8cbf4f47 | 566 | } |
f094af7b SH |
567 | break; |
568 | ||
569 | case OVS_ACTION_ATTR_PUSH_MPLS: { | |
570 | const struct ovs_action_push_mpls *mpls = nl_attr_get(a); | |
8cbf4f47 DDP |
571 | |
572 | for (i = 0; i < cnt; i++) { | |
cf62fa4c | 573 | push_mpls(packets[i], mpls->mpls_ethertype, mpls->mpls_lse); |
8cbf4f47 | 574 | } |
f094af7b SH |
575 | break; |
576 | } | |
577 | ||
578 | case OVS_ACTION_ATTR_POP_MPLS: | |
8cbf4f47 | 579 | for (i = 0; i < cnt; i++) { |
cf62fa4c | 580 | pop_mpls(packets[i], nl_attr_get_be16(a)); |
8cbf4f47 | 581 | } |
f094af7b SH |
582 | break; |
583 | ||
584 | case OVS_ACTION_ATTR_SET: | |
8cbf4f47 | 585 | for (i = 0; i < cnt; i++) { |
41ccaa24 | 586 | odp_execute_set_action(packets[i], nl_attr_get(a)); |
6d670e7f JR |
587 | } |
588 | break; | |
589 | ||
590 | case OVS_ACTION_ATTR_SET_MASKED: | |
591 | for (i = 0; i < cnt; i++) { | |
41ccaa24 | 592 | odp_execute_masked_set_action(packets[i], nl_attr_get(a)); |
8cbf4f47 | 593 | } |
f094af7b SH |
594 | break; |
595 | ||
596 | case OVS_ACTION_ATTR_SAMPLE: | |
8cbf4f47 | 597 | for (i = 0; i < cnt; i++) { |
41ccaa24 | 598 | odp_execute_sample(dp, packets[i], steal && last_action, a, |
1164afb6 DDP |
599 | dp_execute_action); |
600 | } | |
601 | ||
602 | if (last_action) { | |
603 | /* We do not need to free the packets. odp_execute_sample() has | |
604 | * stolen them*/ | |
605 | return; | |
8cbf4f47 | 606 | } |
f094af7b SH |
607 | break; |
608 | ||
db8bb9a5 JS |
609 | case OVS_ACTION_ATTR_OUTPUT: |
610 | case OVS_ACTION_ATTR_TUNNEL_PUSH: | |
611 | case OVS_ACTION_ATTR_TUNNEL_POP: | |
612 | case OVS_ACTION_ATTR_USERSPACE: | |
613 | case OVS_ACTION_ATTR_RECIRC: | |
f094af7b SH |
614 | case OVS_ACTION_ATTR_UNSPEC: |
615 | case __OVS_ACTION_ATTR_MAX: | |
428b2edd | 616 | OVS_NOT_REACHED(); |
f094af7b SH |
617 | } |
618 | } | |
8cbf4f47 | 619 | |
1164afb6 | 620 | if (steal) { |
8cbf4f47 | 621 | for (i = 0; i < cnt; i++) { |
e14deea0 | 622 | dp_packet_delete(packets[i]); |
8cbf4f47 | 623 | } |
df1e5a3b | 624 | } |
da546e07 | 625 | } |