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netdev-tc-offloads: Add support for IP fragmentation
[ovs.git] / lib / tc.c
1 /*
2 * Copyright (c) 2009-2017 Nicira, Inc.
3 * Copyright (c) 2016 Mellanox Technologies, Ltd.
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 "tc.h"
20
21 #include <errno.h>
22 #include <linux/if_ether.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/tc_act/tc_csum.h>
25 #include <linux/tc_act/tc_gact.h>
26 #include <linux/tc_act/tc_mirred.h>
27 #include <linux/tc_act/tc_pedit.h>
28 #include <linux/tc_act/tc_tunnel_key.h>
29 #include <linux/tc_act/tc_vlan.h>
30 #include <linux/gen_stats.h>
31 #include <net/if.h>
32 #include <unistd.h>
33
34 #include "byte-order.h"
35 #include "netlink-socket.h"
36 #include "netlink.h"
37 #include "openvswitch/ofpbuf.h"
38 #include "openvswitch/util.h"
39 #include "openvswitch/vlog.h"
40 #include "packets.h"
41 #include "timeval.h"
42 #include "unaligned.h"
43
44 #define MAX_PEDIT_OFFSETS 32
45
46 VLOG_DEFINE_THIS_MODULE(tc);
47
48 static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(60, 5);
49
50 enum tc_offload_policy {
51 TC_POLICY_NONE,
52 TC_POLICY_SKIP_SW,
53 TC_POLICY_SKIP_HW
54 };
55
56 static enum tc_offload_policy tc_policy = TC_POLICY_NONE;
57
58 struct tc_pedit_key_ex {
59 enum pedit_header_type htype;
60 enum pedit_cmd cmd;
61 };
62
63 struct flower_key_to_pedit {
64 enum pedit_header_type htype;
65 int offset;
66 int flower_offset;
67 int size;
68 };
69
70 static struct flower_key_to_pedit flower_pedit_map[] = {
71 {
72 TCA_PEDIT_KEY_EX_HDR_TYPE_IP4,
73 12,
74 offsetof(struct tc_flower_key, ipv4.ipv4_src),
75 MEMBER_SIZEOF(struct tc_flower_key, ipv4.ipv4_src)
76 }, {
77 TCA_PEDIT_KEY_EX_HDR_TYPE_IP4,
78 16,
79 offsetof(struct tc_flower_key, ipv4.ipv4_dst),
80 MEMBER_SIZEOF(struct tc_flower_key, ipv4.ipv4_dst)
81 }, {
82 TCA_PEDIT_KEY_EX_HDR_TYPE_IP4,
83 8,
84 offsetof(struct tc_flower_key, ipv4.rewrite_ttl),
85 MEMBER_SIZEOF(struct tc_flower_key, ipv4.rewrite_ttl)
86 }, {
87 TCA_PEDIT_KEY_EX_HDR_TYPE_IP6,
88 8,
89 offsetof(struct tc_flower_key, ipv6.ipv6_src),
90 MEMBER_SIZEOF(struct tc_flower_key, ipv6.ipv6_src)
91 }, {
92 TCA_PEDIT_KEY_EX_HDR_TYPE_IP6,
93 24,
94 offsetof(struct tc_flower_key, ipv6.ipv6_dst),
95 MEMBER_SIZEOF(struct tc_flower_key, ipv6.ipv6_dst)
96 }, {
97 TCA_PEDIT_KEY_EX_HDR_TYPE_ETH,
98 6,
99 offsetof(struct tc_flower_key, src_mac),
100 MEMBER_SIZEOF(struct tc_flower_key, src_mac)
101 }, {
102 TCA_PEDIT_KEY_EX_HDR_TYPE_ETH,
103 0,
104 offsetof(struct tc_flower_key, dst_mac),
105 MEMBER_SIZEOF(struct tc_flower_key, dst_mac)
106 }, {
107 TCA_PEDIT_KEY_EX_HDR_TYPE_ETH,
108 12,
109 offsetof(struct tc_flower_key, eth_type),
110 MEMBER_SIZEOF(struct tc_flower_key, eth_type)
111 }, {
112 TCA_PEDIT_KEY_EX_HDR_TYPE_TCP,
113 0,
114 offsetof(struct tc_flower_key, tcp_src),
115 MEMBER_SIZEOF(struct tc_flower_key, tcp_src)
116 }, {
117 TCA_PEDIT_KEY_EX_HDR_TYPE_TCP,
118 2,
119 offsetof(struct tc_flower_key, tcp_dst),
120 MEMBER_SIZEOF(struct tc_flower_key, tcp_dst)
121 }, {
122 TCA_PEDIT_KEY_EX_HDR_TYPE_UDP,
123 0,
124 offsetof(struct tc_flower_key, udp_src),
125 MEMBER_SIZEOF(struct tc_flower_key, udp_src)
126 }, {
127 TCA_PEDIT_KEY_EX_HDR_TYPE_UDP,
128 2,
129 offsetof(struct tc_flower_key, udp_dst),
130 MEMBER_SIZEOF(struct tc_flower_key, udp_dst)
131 },
132 };
133
134 static inline int
135 csum_update_flag(struct tc_flower *flower,
136 enum pedit_header_type htype);
137
138 struct tcmsg *
139 tc_make_request(int ifindex, int type, unsigned int flags,
140 struct ofpbuf *request)
141 {
142 struct tcmsg *tcmsg;
143
144 ofpbuf_init(request, 512);
145 nl_msg_put_nlmsghdr(request, sizeof *tcmsg, type, NLM_F_REQUEST | flags);
146 tcmsg = ofpbuf_put_zeros(request, sizeof *tcmsg);
147 tcmsg->tcm_family = AF_UNSPEC;
148 tcmsg->tcm_ifindex = ifindex;
149 /* Caller should fill in tcmsg->tcm_handle. */
150 /* Caller should fill in tcmsg->tcm_parent. */
151
152 return tcmsg;
153 }
154
155 int
156 tc_transact(struct ofpbuf *request, struct ofpbuf **replyp)
157 {
158 int error = nl_transact(NETLINK_ROUTE, request, replyp);
159 ofpbuf_uninit(request);
160 return error;
161 }
162
163 /* Adds or deletes a root ingress qdisc on device with specified ifindex.
164 *
165 * This function is equivalent to running the following when 'add' is true:
166 * /sbin/tc qdisc add dev <devname> handle ffff: ingress
167 *
168 * This function is equivalent to running the following when 'add' is false:
169 * /sbin/tc qdisc del dev <devname> handle ffff: ingress
170 *
171 * Where dev <devname> is the device with specified ifindex name.
172 *
173 * The configuration and stats may be seen with the following command:
174 * /sbin/tc -s qdisc show dev <devname>
175 *
176 * Returns 0 if successful, otherwise a positive errno value.
177 */
178 int
179 tc_add_del_ingress_qdisc(int ifindex, bool add)
180 {
181 struct ofpbuf request;
182 struct tcmsg *tcmsg;
183 int error;
184 int type = add ? RTM_NEWQDISC : RTM_DELQDISC;
185 int flags = add ? NLM_F_EXCL | NLM_F_CREATE : 0;
186
187 tcmsg = tc_make_request(ifindex, type, flags, &request);
188 tcmsg->tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0);
189 tcmsg->tcm_parent = TC_H_INGRESS;
190 nl_msg_put_string(&request, TCA_KIND, "ingress");
191 nl_msg_put_unspec(&request, TCA_OPTIONS, NULL, 0);
192
193 error = tc_transact(&request, NULL);
194 if (error) {
195 /* If we're deleting the qdisc, don't worry about some of the
196 * error conditions. */
197 if (!add && (error == ENOENT || error == EINVAL)) {
198 return 0;
199 }
200 return error;
201 }
202
203 return 0;
204 }
205
206 static const struct nl_policy tca_policy[] = {
207 [TCA_KIND] = { .type = NL_A_STRING, .optional = false, },
208 [TCA_OPTIONS] = { .type = NL_A_NESTED, .optional = false, },
209 [TCA_STATS] = { .type = NL_A_UNSPEC,
210 .min_len = sizeof(struct tc_stats), .optional = true, },
211 [TCA_STATS2] = { .type = NL_A_NESTED, .optional = true, },
212 };
213
214 static const struct nl_policy tca_flower_policy[] = {
215 [TCA_FLOWER_CLASSID] = { .type = NL_A_U32, .optional = true, },
216 [TCA_FLOWER_INDEV] = { .type = NL_A_STRING, .max_len = IFNAMSIZ,
217 .optional = true, },
218 [TCA_FLOWER_KEY_ETH_SRC] = { .type = NL_A_UNSPEC,
219 .min_len = ETH_ALEN, .optional = true, },
220 [TCA_FLOWER_KEY_ETH_DST] = { .type = NL_A_UNSPEC,
221 .min_len = ETH_ALEN, .optional = true, },
222 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .type = NL_A_UNSPEC,
223 .min_len = ETH_ALEN,
224 .optional = true, },
225 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .type = NL_A_UNSPEC,
226 .min_len = ETH_ALEN,
227 .optional = true, },
228 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NL_A_U16, .optional = false, },
229 [TCA_FLOWER_FLAGS] = { .type = NL_A_U32, .optional = false, },
230 [TCA_FLOWER_ACT] = { .type = NL_A_NESTED, .optional = false, },
231 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NL_A_U8, .optional = true, },
232 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NL_A_U32, .optional = true, },
233 [TCA_FLOWER_KEY_IPV4_DST] = {.type = NL_A_U32, .optional = true, },
234 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NL_A_U32, .optional = true, },
235 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NL_A_U32, .optional = true, },
236 [TCA_FLOWER_KEY_IPV6_SRC] = { .type = NL_A_UNSPEC,
237 .min_len = sizeof(struct in6_addr),
238 .optional = true, },
239 [TCA_FLOWER_KEY_IPV6_DST] = { .type = NL_A_UNSPEC,
240 .min_len = sizeof(struct in6_addr),
241 .optional = true, },
242 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .type = NL_A_UNSPEC,
243 .min_len = sizeof(struct in6_addr),
244 .optional = true, },
245 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .type = NL_A_UNSPEC,
246 .min_len = sizeof(struct in6_addr),
247 .optional = true, },
248 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NL_A_U16, .optional = true, },
249 [TCA_FLOWER_KEY_TCP_DST] = { .type = NL_A_U16, .optional = true, },
250 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NL_A_U16, .optional = true, },
251 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NL_A_U16, .optional = true, },
252 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NL_A_U16, .optional = true, },
253 [TCA_FLOWER_KEY_UDP_DST] = { .type = NL_A_U16, .optional = true, },
254 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NL_A_U16, .optional = true, },
255 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NL_A_U16, .optional = true, },
256 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NL_A_U16, .optional = true, },
257 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NL_A_U16, .optional = true, },
258 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NL_A_U16, .optional = true, },
259 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NL_A_U16, .optional = true, },
260 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NL_A_U16, .optional = true, },
261 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NL_A_U8, .optional = true, },
262 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NL_A_U16, .optional = true, },
263 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NL_A_U32, .optional = true, },
264 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NL_A_U32, .optional = true, },
265 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NL_A_U32, .optional = true, },
266 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NL_A_U32,
267 .optional = true, },
268 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NL_A_U32,
269 .optional = true, },
270 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .type = NL_A_UNSPEC,
271 .min_len = sizeof(struct in6_addr),
272 .optional = true, },
273 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .type = NL_A_UNSPEC,
274 .min_len = sizeof(struct in6_addr),
275 .optional = true, },
276 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .type = NL_A_UNSPEC,
277 .min_len = sizeof(struct in6_addr),
278 .optional = true, },
279 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .type = NL_A_UNSPEC,
280 .min_len = sizeof(struct in6_addr),
281 .optional = true, },
282 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NL_A_U16,
283 .optional = true, },
284 [TCA_FLOWER_KEY_FLAGS] = { .type = NL_A_BE32, .optional = true, },
285 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NL_A_BE32, .optional = true, },
286 [TCA_FLOWER_KEY_IP_TTL] = { .type = NL_A_U8,
287 .optional = true, },
288 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NL_A_U8,
289 .optional = true, },
290 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NL_A_U16,
291 .optional = true, },
292 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NL_A_U16,
293 .optional = true, },
294 };
295
296 static void
297 nl_parse_flower_eth(struct nlattr **attrs, struct tc_flower *flower)
298 {
299 const struct eth_addr *eth;
300
301 if (attrs[TCA_FLOWER_KEY_ETH_SRC_MASK]) {
302 eth = nl_attr_get_unspec(attrs[TCA_FLOWER_KEY_ETH_SRC], ETH_ALEN);
303 memcpy(&flower->key.src_mac, eth, sizeof flower->key.src_mac);
304
305 eth = nl_attr_get_unspec(attrs[TCA_FLOWER_KEY_ETH_SRC_MASK], ETH_ALEN);
306 memcpy(&flower->mask.src_mac, eth, sizeof flower->mask.src_mac);
307 }
308 if (attrs[TCA_FLOWER_KEY_ETH_DST_MASK]) {
309 eth = nl_attr_get_unspec(attrs[TCA_FLOWER_KEY_ETH_DST], ETH_ALEN);
310 memcpy(&flower->key.dst_mac, eth, sizeof flower->key.dst_mac);
311
312 eth = nl_attr_get_unspec(attrs[TCA_FLOWER_KEY_ETH_DST_MASK], ETH_ALEN);
313 memcpy(&flower->mask.dst_mac, eth, sizeof flower->mask.dst_mac);
314 }
315 }
316
317 static void
318 nl_parse_flower_vlan(struct nlattr **attrs, struct tc_flower *flower)
319 {
320 if (flower->key.eth_type != htons(ETH_TYPE_VLAN)) {
321 return;
322 }
323
324 flower->key.encap_eth_type =
325 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_ETH_TYPE]);
326
327 if (attrs[TCA_FLOWER_KEY_VLAN_ID]) {
328 flower->key.vlan_id =
329 nl_attr_get_u16(attrs[TCA_FLOWER_KEY_VLAN_ID]);
330 }
331 if (attrs[TCA_FLOWER_KEY_VLAN_PRIO]) {
332 flower->key.vlan_prio =
333 nl_attr_get_u8(attrs[TCA_FLOWER_KEY_VLAN_PRIO]);
334 }
335 }
336
337 static void
338 nl_parse_flower_tunnel(struct nlattr **attrs, struct tc_flower *flower)
339 {
340 if (attrs[TCA_FLOWER_KEY_ENC_KEY_ID]) {
341 ovs_be32 id = nl_attr_get_be32(attrs[TCA_FLOWER_KEY_ENC_KEY_ID]);
342
343 flower->tunnel.id = be32_to_be64(id);
344 }
345 if (attrs[TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK]) {
346 flower->tunnel.ipv4.ipv4_src =
347 nl_attr_get_be32(attrs[TCA_FLOWER_KEY_ENC_IPV4_SRC]);
348 }
349 if (attrs[TCA_FLOWER_KEY_ENC_IPV4_DST_MASK]) {
350 flower->tunnel.ipv4.ipv4_dst =
351 nl_attr_get_be32(attrs[TCA_FLOWER_KEY_ENC_IPV4_DST]);
352 }
353 if (attrs[TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK]) {
354 flower->tunnel.ipv6.ipv6_src =
355 nl_attr_get_in6_addr(attrs[TCA_FLOWER_KEY_ENC_IPV6_SRC]);
356 }
357 if (attrs[TCA_FLOWER_KEY_ENC_IPV6_DST_MASK]) {
358 flower->tunnel.ipv6.ipv6_dst =
359 nl_attr_get_in6_addr(attrs[TCA_FLOWER_KEY_ENC_IPV6_DST]);
360 }
361 if (attrs[TCA_FLOWER_KEY_ENC_UDP_DST_PORT]) {
362 flower->tunnel.tp_dst =
363 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_ENC_UDP_DST_PORT]);
364 }
365 }
366
367 static void
368 nl_parse_flower_ip(struct nlattr **attrs, struct tc_flower *flower) {
369 uint8_t ip_proto = 0;
370 struct tc_flower_key *key = &flower->key;
371 struct tc_flower_key *mask = &flower->mask;
372
373 if (attrs[TCA_FLOWER_KEY_IP_PROTO]) {
374 ip_proto = nl_attr_get_u8(attrs[TCA_FLOWER_KEY_IP_PROTO]);
375 key->ip_proto = ip_proto;
376 mask->ip_proto = UINT8_MAX;
377 }
378
379 if (attrs[TCA_FLOWER_KEY_FLAGS_MASK]) {
380 key->flags = ntohl(nl_attr_get_u32(attrs[TCA_FLOWER_KEY_FLAGS]));
381 mask->flags = ntohl(nl_attr_get_u32(attrs[TCA_FLOWER_KEY_FLAGS_MASK]));
382 }
383
384 if (attrs[TCA_FLOWER_KEY_IPV4_SRC_MASK]) {
385 key->ipv4.ipv4_src =
386 nl_attr_get_be32(attrs[TCA_FLOWER_KEY_IPV4_SRC]);
387 mask->ipv4.ipv4_src =
388 nl_attr_get_be32(attrs[TCA_FLOWER_KEY_IPV4_SRC_MASK]);
389 }
390 if (attrs[TCA_FLOWER_KEY_IPV4_DST_MASK]) {
391 key->ipv4.ipv4_dst =
392 nl_attr_get_be32(attrs[TCA_FLOWER_KEY_IPV4_DST]);
393 mask->ipv4.ipv4_dst =
394 nl_attr_get_be32(attrs[TCA_FLOWER_KEY_IPV4_DST_MASK]);
395 }
396 if (attrs[TCA_FLOWER_KEY_IPV6_SRC_MASK]) {
397 struct nlattr *attr = attrs[TCA_FLOWER_KEY_IPV6_SRC];
398 struct nlattr *attr_mask = attrs[TCA_FLOWER_KEY_IPV6_SRC_MASK];
399
400 key->ipv6.ipv6_src = nl_attr_get_in6_addr(attr);
401 mask->ipv6.ipv6_src = nl_attr_get_in6_addr(attr_mask);
402 }
403 if (attrs[TCA_FLOWER_KEY_IPV6_DST_MASK]) {
404 struct nlattr *attr = attrs[TCA_FLOWER_KEY_IPV6_DST];
405 struct nlattr *attr_mask = attrs[TCA_FLOWER_KEY_IPV6_DST_MASK];
406
407 key->ipv6.ipv6_dst = nl_attr_get_in6_addr(attr);
408 mask->ipv6.ipv6_dst = nl_attr_get_in6_addr(attr_mask);
409 }
410
411 if (ip_proto == IPPROTO_TCP) {
412 if (attrs[TCA_FLOWER_KEY_TCP_SRC_MASK]) {
413 key->tcp_src =
414 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_SRC]);
415 mask->tcp_src =
416 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_SRC_MASK]);
417 }
418 if (attrs[TCA_FLOWER_KEY_TCP_DST_MASK]) {
419 key->tcp_dst =
420 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_DST]);
421 mask->tcp_dst =
422 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_DST_MASK]);
423 }
424 if (attrs[TCA_FLOWER_KEY_TCP_FLAGS_MASK]) {
425 key->tcp_flags =
426 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_FLAGS]);
427 mask->tcp_flags =
428 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_TCP_FLAGS_MASK]);
429 }
430 } else if (ip_proto == IPPROTO_UDP) {
431 if (attrs[TCA_FLOWER_KEY_UDP_SRC_MASK]) {
432 key->udp_src = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_UDP_SRC]);
433 mask->udp_src =
434 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_UDP_SRC_MASK]);
435 }
436 if (attrs[TCA_FLOWER_KEY_UDP_DST_MASK]) {
437 key->udp_dst = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_UDP_DST]);
438 mask->udp_dst =
439 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_UDP_DST_MASK]);
440 }
441 } else if (ip_proto == IPPROTO_SCTP) {
442 if (attrs[TCA_FLOWER_KEY_SCTP_SRC_MASK]) {
443 key->sctp_src = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_SCTP_SRC]);
444 mask->sctp_src =
445 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_SCTP_SRC_MASK]);
446 }
447 if (attrs[TCA_FLOWER_KEY_SCTP_DST_MASK]) {
448 key->sctp_dst = nl_attr_get_be16(attrs[TCA_FLOWER_KEY_SCTP_DST]);
449 mask->sctp_dst =
450 nl_attr_get_be16(attrs[TCA_FLOWER_KEY_SCTP_DST_MASK]);
451 }
452 }
453
454 if (attrs[TCA_FLOWER_KEY_IP_TTL_MASK]) {
455 key->ip_ttl = nl_attr_get_u8(attrs[TCA_FLOWER_KEY_IP_TTL]);
456 mask->ip_ttl = nl_attr_get_u8(attrs[TCA_FLOWER_KEY_IP_TTL_MASK]);
457 }
458 }
459
460 static const struct nl_policy pedit_policy[] = {
461 [TCA_PEDIT_PARMS_EX] = { .type = NL_A_UNSPEC,
462 .min_len = sizeof(struct tc_pedit),
463 .optional = false, },
464 [TCA_PEDIT_KEYS_EX] = { .type = NL_A_NESTED,
465 .optional = false, },
466 };
467
468 static int
469 nl_parse_act_pedit(struct nlattr *options, struct tc_flower *flower)
470 {
471 struct nlattr *pe_attrs[ARRAY_SIZE(pedit_policy)];
472 const struct tc_pedit *pe;
473 const struct tc_pedit_key *keys;
474 const struct nlattr *nla, *keys_ex, *ex_type;
475 const void *keys_attr;
476 char *rewrite_key = (void *) &flower->rewrite.key;
477 char *rewrite_mask = (void *) &flower->rewrite.mask;
478 size_t keys_ex_size, left;
479 int type, i = 0, err;
480
481 if (!nl_parse_nested(options, pedit_policy, pe_attrs,
482 ARRAY_SIZE(pedit_policy))) {
483 VLOG_ERR_RL(&error_rl, "failed to parse pedit action options");
484 return EPROTO;
485 }
486
487 pe = nl_attr_get_unspec(pe_attrs[TCA_PEDIT_PARMS_EX], sizeof *pe);
488 keys = pe->keys;
489 keys_attr = pe_attrs[TCA_PEDIT_KEYS_EX];
490 keys_ex = nl_attr_get(keys_attr);
491 keys_ex_size = nl_attr_get_size(keys_attr);
492
493 NL_ATTR_FOR_EACH (nla, left, keys_ex, keys_ex_size) {
494 if (i >= pe->nkeys) {
495 break;
496 }
497
498 if (nl_attr_type(nla) != TCA_PEDIT_KEY_EX) {
499 VLOG_ERR_RL(&error_rl, "unable to parse legacy pedit type: %d",
500 nl_attr_type(nla));
501 return EOPNOTSUPP;
502 }
503
504 ex_type = nl_attr_find_nested(nla, TCA_PEDIT_KEY_EX_HTYPE);
505 type = nl_attr_get_u16(ex_type);
506
507 err = csum_update_flag(flower, type);
508 if (err) {
509 return err;
510 }
511
512 for (int j = 0; j < ARRAY_SIZE(flower_pedit_map); j++) {
513 struct flower_key_to_pedit *m = &flower_pedit_map[j];
514 int flower_off = m->flower_offset;
515 int sz = m->size;
516 int mf = m->offset;
517
518 if (m->htype != type) {
519 continue;
520 }
521
522 /* check overlap between current pedit key, which is always
523 * 4 bytes (range [off, off + 3]), and a map entry in
524 * flower_pedit_map (range [mf, mf + sz - 1]) */
525 if ((keys->off >= mf && keys->off < mf + sz)
526 || (keys->off + 3 >= mf && keys->off + 3 < mf + sz)) {
527 int diff = flower_off + (keys->off - mf);
528 uint32_t *dst = (void *) (rewrite_key + diff);
529 uint32_t *dst_m = (void *) (rewrite_mask + diff);
530 uint32_t mask = ~(keys->mask);
531 uint32_t zero_bits;
532
533 if (keys->off < mf) {
534 zero_bits = 8 * (mf - keys->off);
535 mask &= UINT32_MAX << zero_bits;
536 } else if (keys->off + 4 > mf + m->size) {
537 zero_bits = 8 * (keys->off + 4 - mf - m->size);
538 mask &= UINT32_MAX >> zero_bits;
539 }
540
541 *dst_m |= mask;
542 *dst |= keys->val & mask;
543 }
544 }
545
546 keys++;
547 i++;
548 }
549
550 flower->rewrite.rewrite = true;
551
552 return 0;
553 }
554
555 static const struct nl_policy tunnel_key_policy[] = {
556 [TCA_TUNNEL_KEY_PARMS] = { .type = NL_A_UNSPEC,
557 .min_len = sizeof(struct tc_tunnel_key),
558 .optional = false, },
559 [TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NL_A_U32, .optional = true, },
560 [TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NL_A_U32, .optional = true, },
561 [TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .type = NL_A_UNSPEC,
562 .min_len = sizeof(struct in6_addr),
563 .optional = true, },
564 [TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .type = NL_A_UNSPEC,
565 .min_len = sizeof(struct in6_addr),
566 .optional = true, },
567 [TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NL_A_U32, .optional = true, },
568 [TCA_TUNNEL_KEY_ENC_DST_PORT] = { .type = NL_A_U16, .optional = true, },
569 };
570
571 static int
572 nl_parse_act_tunnel_key(struct nlattr *options, struct tc_flower *flower)
573 {
574 struct nlattr *tun_attrs[ARRAY_SIZE(tunnel_key_policy)];
575 const struct nlattr *tun_parms;
576 const struct tc_tunnel_key *tun;
577
578 if (!nl_parse_nested(options, tunnel_key_policy, tun_attrs,
579 ARRAY_SIZE(tunnel_key_policy))) {
580 VLOG_ERR_RL(&error_rl, "failed to parse tunnel_key action options");
581 return EPROTO;
582 }
583
584 tun_parms = tun_attrs[TCA_TUNNEL_KEY_PARMS];
585 tun = nl_attr_get_unspec(tun_parms, sizeof *tun);
586 if (tun->t_action == TCA_TUNNEL_KEY_ACT_SET) {
587 struct nlattr *id = tun_attrs[TCA_TUNNEL_KEY_ENC_KEY_ID];
588 struct nlattr *dst_port = tun_attrs[TCA_TUNNEL_KEY_ENC_DST_PORT];
589 struct nlattr *ipv4_src = tun_attrs[TCA_TUNNEL_KEY_ENC_IPV4_SRC];
590 struct nlattr *ipv4_dst = tun_attrs[TCA_TUNNEL_KEY_ENC_IPV4_DST];
591 struct nlattr *ipv6_src = tun_attrs[TCA_TUNNEL_KEY_ENC_IPV6_SRC];
592 struct nlattr *ipv6_dst = tun_attrs[TCA_TUNNEL_KEY_ENC_IPV6_DST];
593
594 flower->set.set = true;
595 flower->set.ipv4.ipv4_src = ipv4_src ? nl_attr_get_be32(ipv4_src) : 0;
596 flower->set.ipv4.ipv4_dst = ipv4_dst ? nl_attr_get_be32(ipv4_dst) : 0;
597 if (ipv6_src) {
598 flower->set.ipv6.ipv6_src = nl_attr_get_in6_addr(ipv6_src);
599 }
600 if (ipv6_dst) {
601 flower->set.ipv6.ipv6_dst = nl_attr_get_in6_addr(ipv6_dst);
602 }
603 flower->set.id = id ? be32_to_be64(nl_attr_get_be32(id)) : 0;
604 flower->set.tp_dst = dst_port ? nl_attr_get_be16(dst_port) : 0;
605 } else if (tun->t_action == TCA_TUNNEL_KEY_ACT_RELEASE) {
606 flower->tunnel.tunnel = true;
607 } else {
608 VLOG_ERR_RL(&error_rl, "unknown tunnel actions: %d, %d",
609 tun->action, tun->t_action);
610 return EINVAL;
611 }
612 return 0;
613 }
614
615 static const struct nl_policy gact_policy[] = {
616 [TCA_GACT_PARMS] = { .type = NL_A_UNSPEC,
617 .min_len = sizeof(struct tc_gact),
618 .optional = false, },
619 [TCA_GACT_TM] = { .type = NL_A_UNSPEC,
620 .min_len = sizeof(struct tcf_t),
621 .optional = false, },
622 };
623
624 static int
625 get_user_hz(void)
626 {
627 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
628 static int user_hz = 100;
629
630 if (ovsthread_once_start(&once)) {
631 user_hz = sysconf(_SC_CLK_TCK);
632 ovsthread_once_done(&once);
633 }
634
635 return user_hz;
636 }
637
638 static void
639 nl_parse_tcf(const struct tcf_t *tm, struct tc_flower *flower)
640 {
641 flower->lastused = time_msec() - (tm->lastuse * 1000 / get_user_hz());
642 }
643
644 static int
645 nl_parse_act_drop(struct nlattr *options, struct tc_flower *flower)
646 {
647 struct nlattr *gact_attrs[ARRAY_SIZE(gact_policy)];
648 const struct tc_gact *p;
649 struct nlattr *gact_parms;
650 const struct tcf_t *tm;
651
652 if (!nl_parse_nested(options, gact_policy, gact_attrs,
653 ARRAY_SIZE(gact_policy))) {
654 VLOG_ERR_RL(&error_rl, "failed to parse gact action options");
655 return EPROTO;
656 }
657
658 gact_parms = gact_attrs[TCA_GACT_PARMS];
659 p = nl_attr_get_unspec(gact_parms, sizeof *p);
660
661 if (p->action != TC_ACT_SHOT) {
662 VLOG_ERR_RL(&error_rl, "unknown gact action: %d", p->action);
663 return EINVAL;
664 }
665
666 tm = nl_attr_get_unspec(gact_attrs[TCA_GACT_TM], sizeof *tm);
667 nl_parse_tcf(tm, flower);
668
669 return 0;
670 }
671
672 static const struct nl_policy mirred_policy[] = {
673 [TCA_MIRRED_PARMS] = { .type = NL_A_UNSPEC,
674 .min_len = sizeof(struct tc_mirred),
675 .optional = false, },
676 [TCA_MIRRED_TM] = { .type = NL_A_UNSPEC,
677 .min_len = sizeof(struct tcf_t),
678 .optional = false, },
679 };
680
681 static int
682 nl_parse_act_mirred(struct nlattr *options, struct tc_flower *flower)
683 {
684
685 struct nlattr *mirred_attrs[ARRAY_SIZE(mirred_policy)];
686 const struct tc_mirred *m;
687 const struct nlattr *mirred_parms;
688 const struct tcf_t *tm;
689 struct nlattr *mirred_tm;
690
691 if (!nl_parse_nested(options, mirred_policy, mirred_attrs,
692 ARRAY_SIZE(mirred_policy))) {
693 VLOG_ERR_RL(&error_rl, "failed to parse mirred action options");
694 return EPROTO;
695 }
696
697 mirred_parms = mirred_attrs[TCA_MIRRED_PARMS];
698 m = nl_attr_get_unspec(mirred_parms, sizeof *m);
699
700 if (m->action != TC_ACT_STOLEN || m->eaction != TCA_EGRESS_REDIR) {
701 VLOG_ERR_RL(&error_rl, "unknown mirred action: %d, %d, %d",
702 m->action, m->eaction, m->ifindex);
703 return EINVAL;
704 }
705
706 flower->ifindex_out = m->ifindex;
707
708 mirred_tm = mirred_attrs[TCA_MIRRED_TM];
709 tm = nl_attr_get_unspec(mirred_tm, sizeof *tm);
710 nl_parse_tcf(tm, flower);
711
712 return 0;
713 }
714
715 static const struct nl_policy vlan_policy[] = {
716 [TCA_VLAN_PARMS] = { .type = NL_A_UNSPEC,
717 .min_len = sizeof(struct tc_vlan),
718 .optional = false, },
719 [TCA_VLAN_PUSH_VLAN_ID] = { .type = NL_A_U16, .optional = true, },
720 [TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NL_A_U16, .optional = true, },
721 [TCA_VLAN_PUSH_VLAN_PRIORITY] = { .type = NL_A_U8, .optional = true, },
722 };
723
724 static int
725 nl_parse_act_vlan(struct nlattr *options, struct tc_flower *flower)
726 {
727 struct nlattr *vlan_attrs[ARRAY_SIZE(vlan_policy)];
728 const struct tc_vlan *v;
729 const struct nlattr *vlan_parms;
730
731 if (!nl_parse_nested(options, vlan_policy, vlan_attrs,
732 ARRAY_SIZE(vlan_policy))) {
733 VLOG_ERR_RL(&error_rl, "failed to parse vlan action options");
734 return EPROTO;
735 }
736
737 vlan_parms = vlan_attrs[TCA_VLAN_PARMS];
738 v = nl_attr_get_unspec(vlan_parms, sizeof *v);
739 if (v->v_action == TCA_VLAN_ACT_PUSH) {
740 struct nlattr *vlan_id = vlan_attrs[TCA_VLAN_PUSH_VLAN_ID];
741 struct nlattr *vlan_prio = vlan_attrs[TCA_VLAN_PUSH_VLAN_PRIORITY];
742
743 flower->vlan_push_id = nl_attr_get_u16(vlan_id);
744 flower->vlan_push_prio = vlan_prio ? nl_attr_get_u8(vlan_prio) : 0;
745 } else if (v->v_action == TCA_VLAN_ACT_POP) {
746 flower->vlan_pop = 1;
747 } else {
748 VLOG_ERR_RL(&error_rl, "unknown vlan action: %d, %d",
749 v->action, v->v_action);
750 return EINVAL;
751 }
752 return 0;
753 }
754
755 static const struct nl_policy csum_policy[] = {
756 [TCA_CSUM_PARMS] = { .type = NL_A_UNSPEC,
757 .min_len = sizeof(struct tc_csum),
758 .optional = false, },
759 };
760
761 static int
762 nl_parse_act_csum(struct nlattr *options, struct tc_flower *flower)
763 {
764 struct nlattr *csum_attrs[ARRAY_SIZE(csum_policy)];
765 const struct tc_csum *c;
766 const struct nlattr *csum_parms;
767
768 if (!nl_parse_nested(options, csum_policy, csum_attrs,
769 ARRAY_SIZE(csum_policy))) {
770 VLOG_ERR_RL(&error_rl, "failed to parse csum action options");
771 return EPROTO;
772 }
773
774 csum_parms = csum_attrs[TCA_CSUM_PARMS];
775 c = nl_attr_get_unspec(csum_parms, sizeof *c);
776
777 /* sanity checks */
778 if (c->update_flags != flower->csum_update_flags) {
779 VLOG_WARN_RL(&error_rl,
780 "expected different act csum flags: 0x%x != 0x%x",
781 flower->csum_update_flags, c->update_flags);
782 return EINVAL;
783 }
784 flower->csum_update_flags = 0; /* so we know csum was handled */
785
786 if (flower->needs_full_ip_proto_mask
787 && flower->mask.ip_proto != UINT8_MAX) {
788 VLOG_WARN_RL(&error_rl, "expected full matching on flower ip_proto");
789 return EINVAL;
790 }
791
792 return 0;
793 }
794
795 static const struct nl_policy act_policy[] = {
796 [TCA_ACT_KIND] = { .type = NL_A_STRING, .optional = false, },
797 [TCA_ACT_COOKIE] = { .type = NL_A_UNSPEC, .optional = true, },
798 [TCA_ACT_OPTIONS] = { .type = NL_A_NESTED, .optional = false, },
799 [TCA_ACT_STATS] = { .type = NL_A_NESTED, .optional = false, },
800 };
801
802 static const struct nl_policy stats_policy[] = {
803 [TCA_STATS_BASIC] = { .type = NL_A_UNSPEC,
804 .min_len = sizeof(struct gnet_stats_basic),
805 .optional = false, },
806 };
807
808 static int
809 nl_parse_single_action(struct nlattr *action, struct tc_flower *flower)
810 {
811 struct nlattr *act_options;
812 struct nlattr *act_stats;
813 struct nlattr *act_cookie;
814 const char *act_kind;
815 struct nlattr *action_attrs[ARRAY_SIZE(act_policy)];
816 struct nlattr *stats_attrs[ARRAY_SIZE(stats_policy)];
817 struct ovs_flow_stats *stats = &flower->stats;
818 const struct gnet_stats_basic *bs;
819 int err = 0;
820
821 if (!nl_parse_nested(action, act_policy, action_attrs,
822 ARRAY_SIZE(act_policy))) {
823 VLOG_ERR_RL(&error_rl, "failed to parse single action options");
824 return EPROTO;
825 }
826
827 act_kind = nl_attr_get_string(action_attrs[TCA_ACT_KIND]);
828 act_options = action_attrs[TCA_ACT_OPTIONS];
829 act_cookie = action_attrs[TCA_ACT_COOKIE];
830
831 if (!strcmp(act_kind, "gact")) {
832 err = nl_parse_act_drop(act_options, flower);
833 } else if (!strcmp(act_kind, "mirred")) {
834 err = nl_parse_act_mirred(act_options, flower);
835 } else if (!strcmp(act_kind, "vlan")) {
836 err = nl_parse_act_vlan(act_options, flower);
837 } else if (!strcmp(act_kind, "tunnel_key")) {
838 err = nl_parse_act_tunnel_key(act_options, flower);
839 } else if (!strcmp(act_kind, "pedit")) {
840 err = nl_parse_act_pedit(act_options, flower);
841 } else if (!strcmp(act_kind, "csum")) {
842 nl_parse_act_csum(act_options, flower);
843 } else {
844 VLOG_ERR_RL(&error_rl, "unknown tc action kind: %s", act_kind);
845 err = EINVAL;
846 }
847
848 if (err) {
849 return err;
850 }
851
852 if (act_cookie) {
853 flower->act_cookie.data = nl_attr_get(act_cookie);
854 flower->act_cookie.len = nl_attr_get_size(act_cookie);
855 }
856
857 act_stats = action_attrs[TCA_ACT_STATS];
858
859 if (!nl_parse_nested(act_stats, stats_policy, stats_attrs,
860 ARRAY_SIZE(stats_policy))) {
861 VLOG_ERR_RL(&error_rl, "failed to parse action stats policy");
862 return EPROTO;
863 }
864
865 bs = nl_attr_get_unspec(stats_attrs[TCA_STATS_BASIC], sizeof *bs);
866 put_32aligned_u64(&stats->n_packets, bs->packets);
867 put_32aligned_u64(&stats->n_bytes, bs->bytes);
868
869 return 0;
870 }
871
872 #define TCA_ACT_MIN_PRIO 1
873
874 static int
875 nl_parse_flower_actions(struct nlattr **attrs, struct tc_flower *flower)
876 {
877 const struct nlattr *actions = attrs[TCA_FLOWER_ACT];
878 static struct nl_policy actions_orders_policy[TCA_ACT_MAX_PRIO + 1] = {};
879 struct nlattr *actions_orders[ARRAY_SIZE(actions_orders_policy)];
880 const int max_size = ARRAY_SIZE(actions_orders_policy);
881
882 for (int i = TCA_ACT_MIN_PRIO; i < max_size; i++) {
883 actions_orders_policy[i].type = NL_A_NESTED;
884 actions_orders_policy[i].optional = true;
885 }
886
887 if (!nl_parse_nested(actions, actions_orders_policy, actions_orders,
888 ARRAY_SIZE(actions_orders_policy))) {
889 VLOG_ERR_RL(&error_rl, "failed to parse flower order of actions");
890 return EPROTO;
891 }
892
893 for (int i = TCA_ACT_MIN_PRIO; i < max_size; i++) {
894 if (actions_orders[i]) {
895 int err = nl_parse_single_action(actions_orders[i], flower);
896
897 if (err) {
898 return err;
899 }
900 }
901 }
902
903 if (flower->csum_update_flags) {
904 VLOG_WARN_RL(&error_rl,
905 "expected act csum with flags: 0x%x",
906 flower->csum_update_flags);
907 return EINVAL;
908 }
909
910 return 0;
911 }
912
913 static int
914 nl_parse_flower_options(struct nlattr *nl_options, struct tc_flower *flower)
915 {
916 struct nlattr *attrs[ARRAY_SIZE(tca_flower_policy)];
917
918 if (!nl_parse_nested(nl_options, tca_flower_policy,
919 attrs, ARRAY_SIZE(tca_flower_policy))) {
920 VLOG_ERR_RL(&error_rl, "failed to parse flower classifier options");
921 return EPROTO;
922 }
923
924 nl_parse_flower_eth(attrs, flower);
925 nl_parse_flower_vlan(attrs, flower);
926 nl_parse_flower_ip(attrs, flower);
927 nl_parse_flower_tunnel(attrs, flower);
928 return nl_parse_flower_actions(attrs, flower);
929 }
930
931 int
932 parse_netlink_to_tc_flower(struct ofpbuf *reply, struct tc_flower *flower)
933 {
934 struct tcmsg *tc;
935 struct nlattr *ta[ARRAY_SIZE(tca_policy)];
936 const char *kind;
937
938 if (NLMSG_HDRLEN + sizeof *tc > reply->size) {
939 return EPROTO;
940 }
941
942 memset(flower, 0, sizeof *flower);
943
944 tc = ofpbuf_at_assert(reply, NLMSG_HDRLEN, sizeof *tc);
945 flower->handle = tc->tcm_handle;
946 flower->key.eth_type = (OVS_FORCE ovs_be16) tc_get_minor(tc->tcm_info);
947 flower->mask.eth_type = OVS_BE16_MAX;
948 flower->prio = tc_get_major(tc->tcm_info);
949
950 if (!flower->handle) {
951 return EAGAIN;
952 }
953
954 if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof *tc,
955 tca_policy, ta, ARRAY_SIZE(ta))) {
956 VLOG_ERR_RL(&error_rl, "failed to parse tca policy");
957 return EPROTO;
958 }
959
960 kind = nl_attr_get_string(ta[TCA_KIND]);
961 if (strcmp(kind, "flower")) {
962 VLOG_ERR_RL(&error_rl, "failed to parse filter: %s", kind);
963 return EPROTO;
964 }
965
966 return nl_parse_flower_options(ta[TCA_OPTIONS], flower);
967 }
968
969 int
970 tc_dump_flower_start(int ifindex, struct nl_dump *dump)
971 {
972 struct ofpbuf request;
973 struct tcmsg *tcmsg;
974
975 tcmsg = tc_make_request(ifindex, RTM_GETTFILTER, NLM_F_DUMP, &request);
976 tcmsg->tcm_parent = TC_INGRESS_PARENT;
977 tcmsg->tcm_info = TC_H_UNSPEC;
978 tcmsg->tcm_handle = 0;
979
980 nl_dump_start(dump, NETLINK_ROUTE, &request);
981 ofpbuf_uninit(&request);
982
983 return 0;
984 }
985
986 int
987 tc_flush(int ifindex)
988 {
989 struct ofpbuf request;
990 struct tcmsg *tcmsg;
991
992 tcmsg = tc_make_request(ifindex, RTM_DELTFILTER, NLM_F_ACK, &request);
993 tcmsg->tcm_parent = TC_INGRESS_PARENT;
994 tcmsg->tcm_info = TC_H_UNSPEC;
995
996 return tc_transact(&request, NULL);
997 }
998
999 int
1000 tc_del_filter(int ifindex, int prio, int handle)
1001 {
1002 struct ofpbuf request;
1003 struct tcmsg *tcmsg;
1004 struct ofpbuf *reply;
1005 int error;
1006
1007 tcmsg = tc_make_request(ifindex, RTM_DELTFILTER, NLM_F_ECHO, &request);
1008 tcmsg->tcm_parent = TC_INGRESS_PARENT;
1009 tcmsg->tcm_info = tc_make_handle(prio, 0);
1010 tcmsg->tcm_handle = handle;
1011
1012 error = tc_transact(&request, &reply);
1013 if (!error) {
1014 ofpbuf_delete(reply);
1015 }
1016 return error;
1017 }
1018
1019 int
1020 tc_get_flower(int ifindex, int prio, int handle, struct tc_flower *flower)
1021 {
1022 struct ofpbuf request;
1023 struct tcmsg *tcmsg;
1024 struct ofpbuf *reply;
1025 int error;
1026
1027 tcmsg = tc_make_request(ifindex, RTM_GETTFILTER, NLM_F_ECHO, &request);
1028 tcmsg->tcm_parent = TC_INGRESS_PARENT;
1029 tcmsg->tcm_info = tc_make_handle(prio, 0);
1030 tcmsg->tcm_handle = handle;
1031
1032 error = tc_transact(&request, &reply);
1033 if (error) {
1034 return error;
1035 }
1036
1037 error = parse_netlink_to_tc_flower(reply, flower);
1038 ofpbuf_delete(reply);
1039 return error;
1040 }
1041
1042 static int
1043 tc_get_tc_cls_policy(enum tc_offload_policy policy)
1044 {
1045 if (policy == TC_POLICY_SKIP_HW) {
1046 return TCA_CLS_FLAGS_SKIP_HW;
1047 } else if (policy == TC_POLICY_SKIP_SW) {
1048 return TCA_CLS_FLAGS_SKIP_SW;
1049 }
1050
1051 return 0;
1052 }
1053
1054 static void
1055 nl_msg_put_act_csum(struct ofpbuf *request, uint32_t flags)
1056 {
1057 size_t offset;
1058
1059 nl_msg_put_string(request, TCA_ACT_KIND, "csum");
1060 offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS);
1061 {
1062 struct tc_csum parm = { .action = TC_ACT_PIPE,
1063 .update_flags = flags };
1064
1065 nl_msg_put_unspec(request, TCA_CSUM_PARMS, &parm, sizeof parm);
1066 }
1067 nl_msg_end_nested(request, offset);
1068 }
1069
1070 static void
1071 nl_msg_put_act_pedit(struct ofpbuf *request, struct tc_pedit *parm,
1072 struct tc_pedit_key_ex *ex)
1073 {
1074 size_t ksize = sizeof *parm + parm->nkeys * sizeof(struct tc_pedit_key);
1075 size_t offset, offset_keys_ex, offset_key;
1076 int i;
1077
1078 nl_msg_put_string(request, TCA_ACT_KIND, "pedit");
1079 offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS);
1080 {
1081 parm->action = TC_ACT_PIPE;
1082
1083 nl_msg_put_unspec(request, TCA_PEDIT_PARMS_EX, parm, ksize);
1084 offset_keys_ex = nl_msg_start_nested(request, TCA_PEDIT_KEYS_EX);
1085 for (i = 0; i < parm->nkeys; i++, ex++) {
1086 offset_key = nl_msg_start_nested(request, TCA_PEDIT_KEY_EX);
1087 nl_msg_put_u16(request, TCA_PEDIT_KEY_EX_HTYPE, ex->htype);
1088 nl_msg_put_u16(request, TCA_PEDIT_KEY_EX_CMD, ex->cmd);
1089 nl_msg_end_nested(request, offset_key);
1090 }
1091 nl_msg_end_nested(request, offset_keys_ex);
1092 }
1093 nl_msg_end_nested(request, offset);
1094 }
1095
1096 static void
1097 nl_msg_put_act_push_vlan(struct ofpbuf *request, uint16_t vid, uint8_t prio)
1098 {
1099 size_t offset;
1100
1101 nl_msg_put_string(request, TCA_ACT_KIND, "vlan");
1102 offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS);
1103 {
1104 struct tc_vlan parm = { .action = TC_ACT_PIPE,
1105 .v_action = TCA_VLAN_ACT_PUSH };
1106
1107 nl_msg_put_unspec(request, TCA_VLAN_PARMS, &parm, sizeof parm);
1108 nl_msg_put_u16(request, TCA_VLAN_PUSH_VLAN_ID, vid);
1109 nl_msg_put_u8(request, TCA_VLAN_PUSH_VLAN_PRIORITY, prio);
1110 }
1111 nl_msg_end_nested(request, offset);
1112 }
1113
1114 static void
1115 nl_msg_put_act_pop_vlan(struct ofpbuf *request)
1116 {
1117 size_t offset;
1118
1119 nl_msg_put_string(request, TCA_ACT_KIND, "vlan");
1120 offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS);
1121 {
1122 struct tc_vlan parm = { .action = TC_ACT_PIPE,
1123 .v_action = TCA_VLAN_ACT_POP };
1124
1125 nl_msg_put_unspec(request, TCA_VLAN_PARMS, &parm, sizeof parm);
1126 }
1127 nl_msg_end_nested(request, offset);
1128 }
1129
1130 static void
1131 nl_msg_put_act_tunnel_key_release(struct ofpbuf *request)
1132 {
1133 size_t offset;
1134
1135 nl_msg_put_string(request, TCA_ACT_KIND, "tunnel_key");
1136 offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS);
1137 {
1138 struct tc_tunnel_key tun = { .action = TC_ACT_PIPE,
1139 .t_action = TCA_TUNNEL_KEY_ACT_RELEASE };
1140
1141 nl_msg_put_unspec(request, TCA_TUNNEL_KEY_PARMS, &tun, sizeof tun);
1142 }
1143 nl_msg_end_nested(request, offset);
1144 }
1145
1146 static void
1147 nl_msg_put_act_tunnel_key_set(struct ofpbuf *request, ovs_be64 id,
1148 ovs_be32 ipv4_src, ovs_be32 ipv4_dst,
1149 struct in6_addr *ipv6_src,
1150 struct in6_addr *ipv6_dst,
1151 ovs_be16 tp_dst)
1152 {
1153 size_t offset;
1154
1155 nl_msg_put_string(request, TCA_ACT_KIND, "tunnel_key");
1156 offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS);
1157 {
1158 struct tc_tunnel_key tun = { .action = TC_ACT_PIPE,
1159 .t_action = TCA_TUNNEL_KEY_ACT_SET };
1160
1161 nl_msg_put_unspec(request, TCA_TUNNEL_KEY_PARMS, &tun, sizeof tun);
1162
1163 ovs_be32 id32 = be64_to_be32(id);
1164 nl_msg_put_be32(request, TCA_TUNNEL_KEY_ENC_KEY_ID, id32);
1165 if (ipv4_dst) {
1166 nl_msg_put_be32(request, TCA_TUNNEL_KEY_ENC_IPV4_SRC, ipv4_src);
1167 nl_msg_put_be32(request, TCA_TUNNEL_KEY_ENC_IPV4_DST, ipv4_dst);
1168 } else if (!is_all_zeros(ipv6_dst, sizeof *ipv6_dst)) {
1169 nl_msg_put_in6_addr(request, TCA_TUNNEL_KEY_ENC_IPV6_DST,
1170 ipv6_dst);
1171 nl_msg_put_in6_addr(request, TCA_TUNNEL_KEY_ENC_IPV6_SRC,
1172 ipv6_src);
1173 }
1174 nl_msg_put_be16(request, TCA_TUNNEL_KEY_ENC_DST_PORT, tp_dst);
1175 }
1176 nl_msg_end_nested(request, offset);
1177 }
1178
1179 static void
1180 nl_msg_put_act_drop(struct ofpbuf *request)
1181 {
1182 size_t offset;
1183
1184 nl_msg_put_string(request, TCA_ACT_KIND, "gact");
1185 offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS);
1186 {
1187 struct tc_gact p = { .action = TC_ACT_SHOT };
1188
1189 nl_msg_put_unspec(request, TCA_GACT_PARMS, &p, sizeof p);
1190 }
1191 nl_msg_end_nested(request, offset);
1192 }
1193
1194 static void
1195 nl_msg_put_act_redirect(struct ofpbuf *request, int ifindex)
1196 {
1197 size_t offset;
1198
1199 nl_msg_put_string(request, TCA_ACT_KIND, "mirred");
1200 offset = nl_msg_start_nested(request, TCA_ACT_OPTIONS);
1201 {
1202 struct tc_mirred m = { .action = TC_ACT_STOLEN,
1203 .eaction = TCA_EGRESS_REDIR,
1204 .ifindex = ifindex };
1205
1206 nl_msg_put_unspec(request, TCA_MIRRED_PARMS, &m, sizeof m);
1207 }
1208 nl_msg_end_nested(request, offset);
1209 }
1210
1211 static inline void
1212 nl_msg_put_act_cookie(struct ofpbuf *request, struct tc_cookie *ck) {
1213 if (ck->len) {
1214 nl_msg_put_unspec(request, TCA_ACT_COOKIE, ck->data, ck->len);
1215 }
1216 }
1217
1218 /* Given flower, a key_to_pedit map entry, calculates the rest,
1219 * where:
1220 *
1221 * mask, data - pointers of where read the first word of flower->key/mask.
1222 * current_offset - which offset to use for the first pedit action.
1223 * cnt - max pedits actions to use.
1224 * first_word_mask/last_word_mask - the mask to use for the first/last read
1225 * (as we read entire words). */
1226 static void
1227 calc_offsets(struct tc_flower *flower, struct flower_key_to_pedit *m,
1228 int *cur_offset, int *cnt, uint32_t *last_word_mask,
1229 uint32_t *first_word_mask, uint32_t **mask, uint32_t **data)
1230 {
1231 int start_offset, max_offset, total_size;
1232 int diff, right_zero_bits, left_zero_bits;
1233 char *rewrite_key = (void *) &flower->rewrite.key;
1234 char *rewrite_mask = (void *) &flower->rewrite.mask;
1235
1236 max_offset = m->offset + m->size;
1237 start_offset = ROUND_DOWN(m->offset, 4);
1238 diff = m->offset - start_offset;
1239 total_size = max_offset - start_offset;
1240 right_zero_bits = 8 * (4 - (max_offset % 4));
1241 left_zero_bits = 8 * (m->offset - start_offset);
1242
1243 *cur_offset = start_offset;
1244 *cnt = (total_size / 4) + (total_size % 4 ? 1 : 0);
1245 *last_word_mask = UINT32_MAX >> right_zero_bits;
1246 *first_word_mask = UINT32_MAX << left_zero_bits;
1247 *data = (void *) (rewrite_key + m->flower_offset - diff);
1248 *mask = (void *) (rewrite_mask + m->flower_offset - diff);
1249 }
1250
1251 static inline int
1252 csum_update_flag(struct tc_flower *flower,
1253 enum pedit_header_type htype) {
1254 /* Explictily specifiy the csum flags so HW can return EOPNOTSUPP
1255 * if it doesn't support a checksum recalculation of some headers.
1256 * And since OVS allows a flow such as
1257 * eth(dst=<mac>),eth_type(0x0800) actions=set(ipv4(src=<new_ip>))
1258 * we need to force a more specific flow as this can, for example,
1259 * need a recalculation of icmp checksum if the packet that passes
1260 * is icmp and tcp checksum if its tcp. */
1261
1262 switch (htype) {
1263 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
1264 flower->csum_update_flags |= TCA_CSUM_UPDATE_FLAG_IPV4HDR;
1265 /* Fall through. */
1266 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
1267 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
1268 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
1269 if (flower->key.ip_proto == IPPROTO_TCP) {
1270 flower->needs_full_ip_proto_mask = true;
1271 flower->csum_update_flags |= TCA_CSUM_UPDATE_FLAG_TCP;
1272 } else if (flower->key.ip_proto == IPPROTO_UDP) {
1273 flower->needs_full_ip_proto_mask = true;
1274 flower->csum_update_flags |= TCA_CSUM_UPDATE_FLAG_UDP;
1275 } else if (flower->key.ip_proto == IPPROTO_ICMP
1276 || flower->key.ip_proto == IPPROTO_ICMPV6) {
1277 flower->needs_full_ip_proto_mask = true;
1278 flower->csum_update_flags |= TCA_CSUM_UPDATE_FLAG_ICMP;
1279 } else {
1280 VLOG_WARN_RL(&error_rl,
1281 "can't offload rewrite of IP/IPV6 with ip_proto: %d",
1282 flower->key.ip_proto);
1283 break;
1284 }
1285 /* Fall through. */
1286 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
1287 return 0; /* success */
1288
1289 case TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK:
1290 case __PEDIT_HDR_TYPE_MAX:
1291 default:
1292 break;
1293 }
1294
1295 return EOPNOTSUPP;
1296 }
1297
1298 static int
1299 nl_msg_put_flower_rewrite_pedits(struct ofpbuf *request,
1300 struct tc_flower *flower)
1301 {
1302 struct {
1303 struct tc_pedit sel;
1304 struct tc_pedit_key keys[MAX_PEDIT_OFFSETS];
1305 struct tc_pedit_key_ex keys_ex[MAX_PEDIT_OFFSETS];
1306 } sel = {
1307 .sel = {
1308 .nkeys = 0
1309 }
1310 };
1311 int i, j, err;
1312
1313 for (i = 0; i < ARRAY_SIZE(flower_pedit_map); i++) {
1314 struct flower_key_to_pedit *m = &flower_pedit_map[i];
1315 struct tc_pedit_key *pedit_key = NULL;
1316 struct tc_pedit_key_ex *pedit_key_ex = NULL;
1317 uint32_t *mask, *data, first_word_mask, last_word_mask;
1318 int cnt = 0, cur_offset = 0;
1319
1320 if (!m->size) {
1321 continue;
1322 }
1323
1324 calc_offsets(flower, m, &cur_offset, &cnt, &last_word_mask,
1325 &first_word_mask, &mask, &data);
1326
1327 for (j = 0; j < cnt; j++, mask++, data++, cur_offset += 4) {
1328 uint32_t mask_word = *mask;
1329
1330 if (j == 0) {
1331 mask_word &= first_word_mask;
1332 }
1333 if (j == cnt - 1) {
1334 mask_word &= last_word_mask;
1335 }
1336 if (!mask_word) {
1337 continue;
1338 }
1339 if (sel.sel.nkeys == MAX_PEDIT_OFFSETS) {
1340 VLOG_WARN_RL(&error_rl, "reached too many pedit offsets: %d",
1341 MAX_PEDIT_OFFSETS);
1342 return EOPNOTSUPP;
1343 }
1344
1345 pedit_key = &sel.keys[sel.sel.nkeys];
1346 pedit_key_ex = &sel.keys_ex[sel.sel.nkeys];
1347 pedit_key_ex->cmd = TCA_PEDIT_KEY_EX_CMD_SET;
1348 pedit_key_ex->htype = m->htype;
1349 pedit_key->off = cur_offset;
1350 pedit_key->mask = ~mask_word;
1351 pedit_key->val = *data & mask_word;
1352 sel.sel.nkeys++;
1353
1354 err = csum_update_flag(flower, m->htype);
1355 if (err) {
1356 return err;
1357 }
1358
1359 if (flower->needs_full_ip_proto_mask) {
1360 flower->mask.ip_proto = UINT8_MAX;
1361 }
1362 }
1363 }
1364 nl_msg_put_act_pedit(request, &sel.sel, sel.keys_ex);
1365
1366 return 0;
1367 }
1368
1369 static int
1370 nl_msg_put_flower_acts(struct ofpbuf *request, struct tc_flower *flower)
1371 {
1372 size_t offset;
1373 size_t act_offset;
1374
1375 offset = nl_msg_start_nested(request, TCA_FLOWER_ACT);
1376 {
1377 uint16_t act_index = 1;
1378 int error;
1379
1380 if (flower->rewrite.rewrite) {
1381 act_offset = nl_msg_start_nested(request, act_index++);
1382 error = nl_msg_put_flower_rewrite_pedits(request, flower);
1383 if (error) {
1384 return error;
1385 }
1386 nl_msg_end_nested(request, act_offset);
1387
1388 if (flower->csum_update_flags) {
1389 act_offset = nl_msg_start_nested(request, act_index++);
1390 nl_msg_put_act_csum(request, flower->csum_update_flags);
1391 nl_msg_end_nested(request, act_offset);
1392 }
1393 }
1394 if (flower->tunnel.tunnel) {
1395 act_offset = nl_msg_start_nested(request, act_index++);
1396 nl_msg_put_act_tunnel_key_release(request);
1397 nl_msg_end_nested(request, act_offset);
1398 }
1399 if (flower->set.set) {
1400 act_offset = nl_msg_start_nested(request, act_index++);
1401 nl_msg_put_act_tunnel_key_set(request, flower->set.id,
1402 flower->set.ipv4.ipv4_src,
1403 flower->set.ipv4.ipv4_dst,
1404 &flower->set.ipv6.ipv6_src,
1405 &flower->set.ipv6.ipv6_dst,
1406 flower->set.tp_dst);
1407 nl_msg_end_nested(request, act_offset);
1408 }
1409 if (flower->vlan_pop) {
1410 act_offset = nl_msg_start_nested(request, act_index++);
1411 nl_msg_put_act_pop_vlan(request);
1412 nl_msg_end_nested(request, act_offset);
1413 }
1414 if (flower->vlan_push_id) {
1415 act_offset = nl_msg_start_nested(request, act_index++);
1416 nl_msg_put_act_push_vlan(request,
1417 flower->vlan_push_id,
1418 flower->vlan_push_prio);
1419 nl_msg_end_nested(request, act_offset);
1420 }
1421 if (flower->ifindex_out) {
1422 act_offset = nl_msg_start_nested(request, act_index++);
1423 nl_msg_put_act_redirect(request, flower->ifindex_out);
1424 nl_msg_put_act_cookie(request, &flower->act_cookie);
1425 nl_msg_end_nested(request, act_offset);
1426 } else {
1427 act_offset = nl_msg_start_nested(request, act_index++);
1428 nl_msg_put_act_drop(request);
1429 nl_msg_put_act_cookie(request, &flower->act_cookie);
1430 nl_msg_end_nested(request, act_offset);
1431 }
1432 }
1433 nl_msg_end_nested(request, offset);
1434
1435 return 0;
1436 }
1437
1438 static void
1439 nl_msg_put_masked_value(struct ofpbuf *request, uint16_t type,
1440 uint16_t mask_type, const void *data,
1441 const void *mask_data, size_t len)
1442 {
1443 if (mask_type != TCA_FLOWER_UNSPEC) {
1444 if (is_all_zeros(mask_data, len)) {
1445 return;
1446 }
1447 nl_msg_put_unspec(request, mask_type, mask_data, len);
1448 }
1449 nl_msg_put_unspec(request, type, data, len);
1450 }
1451
1452 static void
1453 nl_msg_put_flower_tunnel(struct ofpbuf *request, struct tc_flower *flower)
1454 {
1455 ovs_be32 ipv4_src = flower->tunnel.ipv4.ipv4_src;
1456 ovs_be32 ipv4_dst = flower->tunnel.ipv4.ipv4_dst;
1457 struct in6_addr *ipv6_src = &flower->tunnel.ipv6.ipv6_src;
1458 struct in6_addr *ipv6_dst = &flower->tunnel.ipv6.ipv6_dst;
1459 ovs_be16 tp_dst = flower->tunnel.tp_dst;
1460 ovs_be32 id = be64_to_be32(flower->tunnel.id);
1461
1462 nl_msg_put_be32(request, TCA_FLOWER_KEY_ENC_KEY_ID, id);
1463 if (ipv4_dst) {
1464 nl_msg_put_be32(request, TCA_FLOWER_KEY_ENC_IPV4_SRC, ipv4_src);
1465 nl_msg_put_be32(request, TCA_FLOWER_KEY_ENC_IPV4_DST, ipv4_dst);
1466 } else if (!is_all_zeros(ipv6_dst, sizeof *ipv6_dst)) {
1467 nl_msg_put_in6_addr(request, TCA_FLOWER_KEY_ENC_IPV6_SRC, ipv6_src);
1468 nl_msg_put_in6_addr(request, TCA_FLOWER_KEY_ENC_IPV6_DST, ipv6_dst);
1469 }
1470 nl_msg_put_be16(request, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, tp_dst);
1471 }
1472
1473 #define FLOWER_PUT_MASKED_VALUE(member, type) \
1474 nl_msg_put_masked_value(request, type, type##_MASK, &flower->key.member, \
1475 &flower->mask.member, sizeof flower->key.member)
1476
1477 static int
1478 nl_msg_put_flower_options(struct ofpbuf *request, struct tc_flower *flower)
1479 {
1480
1481 uint16_t host_eth_type = ntohs(flower->key.eth_type);
1482 bool is_vlan = (host_eth_type == ETH_TYPE_VLAN);
1483 int err;
1484
1485 /* need to parse acts first as some acts require changing the matching
1486 * see csum_update_flag() */
1487 err = nl_msg_put_flower_acts(request, flower);
1488 if (err) {
1489 return err;
1490 }
1491
1492 if (is_vlan) {
1493 host_eth_type = ntohs(flower->key.encap_eth_type);
1494 }
1495
1496 FLOWER_PUT_MASKED_VALUE(dst_mac, TCA_FLOWER_KEY_ETH_DST);
1497 FLOWER_PUT_MASKED_VALUE(src_mac, TCA_FLOWER_KEY_ETH_SRC);
1498
1499 if (host_eth_type == ETH_P_IP || host_eth_type == ETH_P_IPV6) {
1500 if (flower->mask.ip_proto && flower->key.ip_proto) {
1501 nl_msg_put_u8(request, TCA_FLOWER_KEY_IP_PROTO,
1502 flower->key.ip_proto);
1503 }
1504
1505 if (flower->mask.flags) {
1506 nl_msg_put_u32(request, TCA_FLOWER_KEY_FLAGS,
1507 htonl(flower->key.flags));
1508 nl_msg_put_u32(request, TCA_FLOWER_KEY_FLAGS_MASK,
1509 htonl(flower->mask.flags));
1510 }
1511
1512 if (flower->key.ip_proto == IPPROTO_UDP) {
1513 FLOWER_PUT_MASKED_VALUE(udp_src, TCA_FLOWER_KEY_UDP_SRC);
1514 FLOWER_PUT_MASKED_VALUE(udp_dst, TCA_FLOWER_KEY_UDP_DST);
1515 } else if (flower->key.ip_proto == IPPROTO_TCP) {
1516 FLOWER_PUT_MASKED_VALUE(tcp_src, TCA_FLOWER_KEY_TCP_SRC);
1517 FLOWER_PUT_MASKED_VALUE(tcp_dst, TCA_FLOWER_KEY_TCP_DST);
1518 FLOWER_PUT_MASKED_VALUE(tcp_flags, TCA_FLOWER_KEY_TCP_FLAGS);
1519 } else if (flower->key.ip_proto == IPPROTO_SCTP) {
1520 FLOWER_PUT_MASKED_VALUE(sctp_src, TCA_FLOWER_KEY_SCTP_SRC);
1521 FLOWER_PUT_MASKED_VALUE(sctp_dst, TCA_FLOWER_KEY_SCTP_DST);
1522 }
1523 }
1524
1525 if (host_eth_type == ETH_P_IP) {
1526 FLOWER_PUT_MASKED_VALUE(ipv4.ipv4_src, TCA_FLOWER_KEY_IPV4_SRC);
1527 FLOWER_PUT_MASKED_VALUE(ipv4.ipv4_dst, TCA_FLOWER_KEY_IPV4_DST);
1528 FLOWER_PUT_MASKED_VALUE(ip_ttl, TCA_FLOWER_KEY_IP_TTL);
1529 } else if (host_eth_type == ETH_P_IPV6) {
1530 FLOWER_PUT_MASKED_VALUE(ipv6.ipv6_src, TCA_FLOWER_KEY_IPV6_SRC);
1531 FLOWER_PUT_MASKED_VALUE(ipv6.ipv6_dst, TCA_FLOWER_KEY_IPV6_DST);
1532 }
1533
1534 nl_msg_put_be16(request, TCA_FLOWER_KEY_ETH_TYPE, flower->key.eth_type);
1535
1536 if (is_vlan) {
1537 if (flower->key.vlan_id || flower->key.vlan_prio) {
1538 nl_msg_put_u16(request, TCA_FLOWER_KEY_VLAN_ID,
1539 flower->key.vlan_id);
1540 nl_msg_put_u8(request, TCA_FLOWER_KEY_VLAN_PRIO,
1541 flower->key.vlan_prio);
1542 }
1543 if (flower->key.encap_eth_type) {
1544 nl_msg_put_be16(request, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1545 flower->key.encap_eth_type);
1546 }
1547 }
1548
1549 nl_msg_put_u32(request, TCA_FLOWER_FLAGS, tc_get_tc_cls_policy(tc_policy));
1550
1551 if (flower->tunnel.tunnel) {
1552 nl_msg_put_flower_tunnel(request, flower);
1553 }
1554
1555 return 0;
1556 }
1557
1558 int
1559 tc_replace_flower(int ifindex, uint16_t prio, uint32_t handle,
1560 struct tc_flower *flower)
1561 {
1562 struct ofpbuf request;
1563 struct tcmsg *tcmsg;
1564 struct ofpbuf *reply;
1565 int error = 0;
1566 size_t basic_offset;
1567 uint16_t eth_type = (OVS_FORCE uint16_t) flower->key.eth_type;
1568
1569 tcmsg = tc_make_request(ifindex, RTM_NEWTFILTER,
1570 NLM_F_CREATE | NLM_F_ECHO, &request);
1571 tcmsg->tcm_parent = TC_INGRESS_PARENT;
1572 tcmsg->tcm_info = tc_make_handle(prio, eth_type);
1573 tcmsg->tcm_handle = handle;
1574
1575 nl_msg_put_string(&request, TCA_KIND, "flower");
1576 basic_offset = nl_msg_start_nested(&request, TCA_OPTIONS);
1577 {
1578 error = nl_msg_put_flower_options(&request, flower);
1579
1580 if (error) {
1581 ofpbuf_uninit(&request);
1582 return error;
1583 }
1584 }
1585 nl_msg_end_nested(&request, basic_offset);
1586
1587 error = tc_transact(&request, &reply);
1588 if (!error) {
1589 struct tcmsg *tc =
1590 ofpbuf_at_assert(reply, NLMSG_HDRLEN, sizeof *tc);
1591
1592 flower->prio = tc_get_major(tc->tcm_info);
1593 flower->handle = tc->tcm_handle;
1594 ofpbuf_delete(reply);
1595 }
1596
1597 return error;
1598 }
1599
1600 void
1601 tc_set_policy(const char *policy)
1602 {
1603 if (!policy) {
1604 return;
1605 }
1606
1607 if (!strcmp(policy, "skip_sw")) {
1608 tc_policy = TC_POLICY_SKIP_SW;
1609 } else if (!strcmp(policy, "skip_hw")) {
1610 tc_policy = TC_POLICY_SKIP_HW;
1611 } else if (!strcmp(policy, "none")) {
1612 tc_policy = TC_POLICY_NONE;
1613 } else {
1614 VLOG_WARN("tc: Invalid policy '%s'", policy);
1615 return;
1616 }
1617
1618 VLOG_INFO("tc: Using policy '%s'", policy);
1619 }
openvswitch packages for PVE