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064af421 1/*
48cecbdc 2 * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
064af421 3 *
a14bc59f
BP		 4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
064af421 7 *
a14bc59f
BP		 8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
064af421
BP		 15 */
16
17#include <config.h>
bed69b3e 18#include <arpa/inet.h>
064af421 19#include "odp-util.h"
36956a7d 20#include <errno.h>
064af421 21#include <inttypes.h>
7202cbe5 22#include <math.h>
6ca00f6f 23#include <netinet/in.h>
685a51a5 24#include <netinet/icmp6.h>
064af421
BP		 25#include <stdlib.h>
26#include <string.h>
cdee00fd 27#include "byte-order.h"
064af421
BP		 28#include "coverage.h"
29#include "dynamic-string.h"
30#include "flow.h"
cdee00fd 31#include "netlink.h"
3bffc610 32#include "ofpbuf.h"
064af421 33#include "packets.h"
44bac24b 34#include "simap.h"
064af421
BP		 35#include "timeval.h"
36#include "util.h"
34118cae
BP		 37#include "vlog.h"
38
39VLOG_DEFINE_THIS_MODULE(odp_util);
064af421 40
df2c07f4
JP		 41/* The interface between userspace and kernel uses an "OVS_*" prefix.
42 * Since this is fairly non-specific for the OVS userspace components,
43 * "ODP_*" (Open vSwitch Datapath) is used as the prefix for
44 * interactions with the datapath.
45 */
46
7202cbe5
BP		 47/* The set of characters that may separate one action or one key attribute
48 * from another. */
49static const char *delimiters = ", \t\r\n";
50
44bac24b 51static int parse_odp_key_attr(const char *, const struct simap *port_names,
7202cbe5 52 struct ofpbuf *);
a052b51b
BP		 53static void format_odp_key_attr(const struct nlattr *a, struct ds *ds);
54
98403001
BP		 55/* Returns one the following for the action with the given OVS_ACTION_ATTR_*
56 * 'type':
57 *
58 * - For an action whose argument has a fixed length, returned that
59 * nonnegative length in bytes.
60 *
61 * - For an action with a variable-length argument, returns -2.
62 *
63 * - For an invalid 'type', returns -1. */
4edb9ae9 64static int
cdee00fd
BP		 65odp_action_len(uint16_t type)
66{
df2c07f4 67 if (type > OVS_ACTION_ATTR_MAX) {
cdee00fd
BP		 68 return -1;
69 }
70
09ded0ad 71 switch ((enum ovs_action_attr) type) {
fea393b1 72 case OVS_ACTION_ATTR_OUTPUT: return sizeof(uint32_t);
98403001 73 case OVS_ACTION_ATTR_USERSPACE: return -2;
fea393b1
BP		 74 case OVS_ACTION_ATTR_PUSH_VLAN: return sizeof(struct ovs_action_push_vlan);
75 case OVS_ACTION_ATTR_POP_VLAN: return 0;
b02475c5
SH		 76 case OVS_ACTION_ATTR_PUSH_MPLS: return sizeof(struct ovs_action_push_mpls);
77 case OVS_ACTION_ATTR_POP_MPLS: return sizeof(ovs_be16);
4edb9ae9 78 case OVS_ACTION_ATTR_SET: return -2;
98403001 79 case OVS_ACTION_ATTR_SAMPLE: return -2;
df2c07f4
JP		 80
81 case OVS_ACTION_ATTR_UNSPEC:
82 case __OVS_ACTION_ATTR_MAX:
cdee00fd
BP		 83 return -1;
84 }
85
86 return -1;
87}
88
744791b5
BP		 89static const char *
90ovs_key_attr_to_string(enum ovs_key_attr attr)
91{
92 static char unknown_attr[3 + INT_STRLEN(unsigned int) + 1];
93
94 switch (attr) {
95 case OVS_KEY_ATTR_UNSPEC: return "unspec";
fea393b1 96 case OVS_KEY_ATTR_ENCAP: return "encap";
1b567fb9 97 case OVS_KEY_ATTR_PRIORITY: return "skb_priority";
72e8bf28 98 case OVS_KEY_ATTR_SKB_MARK: return "skb_mark";
9b405f1a 99 case OVS_KEY_ATTR_TUNNEL: return "tunnel";
744791b5
BP		 100 case OVS_KEY_ATTR_IN_PORT: return "in_port";
101 case OVS_KEY_ATTR_ETHERNET: return "eth";
fea393b1 102 case OVS_KEY_ATTR_VLAN: return "vlan";
744791b5
BP		 103 case OVS_KEY_ATTR_ETHERTYPE: return "eth_type";
104 case OVS_KEY_ATTR_IPV4: return "ipv4";
105 case OVS_KEY_ATTR_IPV6: return "ipv6";
106 case OVS_KEY_ATTR_TCP: return "tcp";
107 case OVS_KEY_ATTR_UDP: return "udp";
108 case OVS_KEY_ATTR_ICMP: return "icmp";
109 case OVS_KEY_ATTR_ICMPV6: return "icmpv6";
110 case OVS_KEY_ATTR_ARP: return "arp";
111 case OVS_KEY_ATTR_ND: return "nd";
b02475c5 112 case OVS_KEY_ATTR_MPLS: return "mpls";
744791b5
BP		 113
114 case __OVS_KEY_ATTR_MAX:
115 default:
116 snprintf(unknown_attr, sizeof unknown_attr, "key%u",
117 (unsigned int) attr);
118 return unknown_attr;
119 }
120}
121
cdee00fd
BP		 122static void
123format_generic_odp_action(struct ds *ds, const struct nlattr *a)
124{
8ba43fbd
BP		 125 size_t len = nl_attr_get_size(a);
126
cdee00fd 127 ds_put_format(ds, "action%"PRId16, nl_attr_type(a));
8ba43fbd 128 if (len) {
cdee00fd
BP		 129 const uint8_t *unspec;
130 unsigned int i;
131
132 unspec = nl_attr_get(a);
8ba43fbd 133 for (i = 0; i < len; i++) {
cdee00fd
BP		 134 ds_put_char(ds, i ? ' ': '(');
135 ds_put_format(ds, "%02x", unspec[i]);
136 }
137 ds_put_char(ds, ')');
138 }
139}
140
6ff686f2
PS		 141static void
142format_odp_sample_action(struct ds *ds, const struct nlattr *attr)
143{
144 static const struct nl_policy ovs_sample_policy[] = {
145 [OVS_SAMPLE_ATTR_PROBABILITY] = { .type = NL_A_U32 },
146 [OVS_SAMPLE_ATTR_ACTIONS] = { .type = NL_A_NESTED }
147 };
148 struct nlattr *a[ARRAY_SIZE(ovs_sample_policy)];
6ff686f2
PS		 149 double percentage;
150 const struct nlattr *nla_acts;
151 int len;
152
153 ds_put_cstr(ds, "sample");
154
5621afff 155 if (!nl_parse_nested(attr, ovs_sample_policy, a, ARRAY_SIZE(a))) {
6ff686f2
PS		 156 ds_put_cstr(ds, "(error)");
157 return;
158 }
159
160 percentage = (100.0 * nl_attr_get_u32(a[OVS_SAMPLE_ATTR_PROBABILITY])) /
161 UINT32_MAX;
162
163 ds_put_format(ds, "(sample=%.1f%%,", percentage);
164
165 ds_put_cstr(ds, "actions(");
166 nla_acts = nl_attr_get(a[OVS_SAMPLE_ATTR_ACTIONS]);
167 len = nl_attr_get_size(a[OVS_SAMPLE_ATTR_ACTIONS]);
168 format_odp_actions(ds, nla_acts, len);
169 ds_put_format(ds, "))");
170}
171
6a7e895f 172static const char *
ec956fc7 173slow_path_reason_to_string(uint32_t data)
6a7e895f 174{
ec956fc7
PS		 175 enum slow_path_reason bit = (enum slow_path_reason) data;
176
6a7e895f
BP		 177 switch (bit) {
178 case SLOW_CFM:
179 return "cfm";
180 case SLOW_LACP:
181 return "lacp";
182 case SLOW_STP:
183 return "stp";
184 case SLOW_IN_BAND:
185 return "in_band";
186 case SLOW_CONTROLLER:
187 return "controller";
188 case SLOW_MATCH:
189 return "match";
190 default:
191 return NULL;
192 }
193}
194
ec956fc7
PS		 195static int
196parse_flags(const char *s, const char *(*bit_to_string)(uint32_t),
197 uint32_t *res)
198{
199 uint32_t result = 0;
200 int n = 0;
201
202 if (s[n] != '(') {
203 return -EINVAL;
204 }
205 n++;
206
207 while (s[n] != ')') {
208 unsigned long long int flags;
209 uint32_t bit;
210 int n0;
211
212 if (sscanf(&s[n], "%lli%n", &flags, &n0) > 0 && n0 > 0) {
213 n += n0 + (s[n + n0] == ',');
214 result |= flags;
215 continue;
216 }
217
218 for (bit = 1; bit; bit <<= 1) {
219 const char *name = bit_to_string(bit);
220 size_t len;
221
222 if (!name) {
223 continue;
224 }
225
226 len = strlen(name);
227 if (!strncmp(s + n, name, len) &&
228 (s[n + len] == ',' || s[n + len] == ')')) {
229 result |= bit;
230 n += len + (s[n + len] == ',');
231 break;
232 }
233 }
234
235 if (!bit) {
236 return -EINVAL;
237 }
238 }
239 n++;
240
241 *res = result;
242 return n;
6a7e895f
BP		 243}
244
98403001
BP		 245static void
246format_odp_userspace_action(struct ds *ds, const struct nlattr *attr)
247{
248 static const struct nl_policy ovs_userspace_policy[] = {
249 [OVS_USERSPACE_ATTR_PID] = { .type = NL_A_U32 },
e995e3df
BP		 250 [OVS_USERSPACE_ATTR_USERDATA] = { .type = NL_A_UNSPEC,
251 .optional = true },
98403001
BP		 252 };
253 struct nlattr *a[ARRAY_SIZE(ovs_userspace_policy)];
e995e3df 254 const struct nlattr *userdata_attr;
98403001
BP		 255
256 if (!nl_parse_nested(attr, ovs_userspace_policy, a, ARRAY_SIZE(a))) {
257 ds_put_cstr(ds, "userspace(error)");
258 return;
259 }
260
261 ds_put_format(ds, "userspace(pid=%"PRIu32,
262 nl_attr_get_u32(a[OVS_USERSPACE_ATTR_PID]));
263
e995e3df 264 userdata_attr = a[OVS_USERSPACE_ATTR_USERDATA];
29089a54
RL		 265
266 if (userdata_attr) {
267 const uint8_t *userdata = nl_attr_get(userdata_attr);
268 size_t userdata_len = nl_attr_get_size(userdata_attr);
269 bool userdata_unspec = true;
1673e0e4 270 union user_action_cookie cookie;
98403001 271
29089a54
RL		 272 if (userdata_len >= sizeof cookie.type
273 && userdata_len <= sizeof cookie) {
274
275 memset(&cookie, 0, sizeof cookie);
276 memcpy(&cookie, userdata, userdata_len);
277
278 userdata_unspec = false;
279
280 if (userdata_len == sizeof cookie.sflow
281 && cookie.type == USER_ACTION_COOKIE_SFLOW) {
282 ds_put_format(ds, ",sFlow("
283 "vid=%"PRIu16",pcp=%"PRIu8",output=%"PRIu32")",
284 vlan_tci_to_vid(cookie.sflow.vlan_tci),
285 vlan_tci_to_pcp(cookie.sflow.vlan_tci),
286 cookie.sflow.output);
287 } else if (userdata_len == sizeof cookie.slow_path
288 && cookie.type == USER_ACTION_COOKIE_SLOW_PATH) {
289 ds_put_cstr(ds, ",slow_path(");
290 format_flags(ds, slow_path_reason_to_string,
291 cookie.slow_path.reason, ',');
292 ds_put_format(ds, ")");
293 } else if (userdata_len == sizeof cookie.flow_sample
294 && cookie.type == USER_ACTION_COOKIE_FLOW_SAMPLE) {
295 ds_put_format(ds, ",flow_sample(probability=%"PRIu16
296 ",collector_set_id=%"PRIu32
297 ",obs_domain_id=%"PRIu32
298 ",obs_point_id=%"PRIu32")",
299 cookie.flow_sample.probability,
300 cookie.flow_sample.collector_set_id,
301 cookie.flow_sample.obs_domain_id,
302 cookie.flow_sample.obs_point_id);
303 } else if (userdata_len == sizeof cookie.ipfix
304 && cookie.type == USER_ACTION_COOKIE_IPFIX) {
305 ds_put_format(ds, ",ipfix");
306 } else {
307 userdata_unspec = true;
308 }
98403001 309 }
e995e3df 310
29089a54
RL		 311 if (userdata_unspec) {
312 size_t i;
313 ds_put_format(ds, ",userdata(");
314 for (i = 0; i < userdata_len; i++) {
315 ds_put_format(ds, "%02x", userdata[i]);
316 }
317 ds_put_char(ds, ')');
e995e3df 318 }
98403001
BP		 319 }
320
321 ds_put_char(ds, ')');
322}
323
8ddc056d
BP		 324static void
325format_vlan_tci(struct ds *ds, ovs_be16 vlan_tci)
326{
327 ds_put_format(ds, "vid=%"PRIu16",pcp=%d",
328 vlan_tci_to_vid(vlan_tci),
329 vlan_tci_to_pcp(vlan_tci));
330 if (!(vlan_tci & htons(VLAN_CFI))) {
331 ds_put_cstr(ds, ",cfi=0");
332 }
333}
334
b02475c5
SH		 335static void
336format_mpls_lse(struct ds *ds, ovs_be32 mpls_lse)
337{
338 ds_put_format(ds, "label=%"PRIu32",tc=%d,ttl=%d,bos=%d",
339 mpls_lse_to_label(mpls_lse),
340 mpls_lse_to_tc(mpls_lse),
341 mpls_lse_to_ttl(mpls_lse),
342 mpls_lse_to_bos(mpls_lse));
343}
344
4edb9ae9 345static void
cdee00fd 346format_odp_action(struct ds *ds, const struct nlattr *a)
064af421 347{
98403001 348 int expected_len;
4edb9ae9 349 enum ovs_action_attr type = nl_attr_type(a);
fea393b1 350 const struct ovs_action_push_vlan *vlan;
cdee00fd 351
98403001
BP		 352 expected_len = odp_action_len(nl_attr_type(a));
353 if (expected_len != -2 && nl_attr_get_size(a) != expected_len) {
8ba43fbd 354 ds_put_format(ds, "bad length %zu, expected %d for: ",
98403001 355 nl_attr_get_size(a), expected_len);
cdee00fd
BP		 356 format_generic_odp_action(ds, a);
357 return;
358 }
359
4edb9ae9 360 switch (type) {
df2c07f4 361 case OVS_ACTION_ATTR_OUTPUT:
cdee00fd 362 ds_put_format(ds, "%"PRIu16, nl_attr_get_u32(a));
064af421 363 break;
df2c07f4 364 case OVS_ACTION_ATTR_USERSPACE:
98403001 365 format_odp_userspace_action(ds, a);
064af421 366 break;
4edb9ae9
PS		 367 case OVS_ACTION_ATTR_SET:
368 ds_put_cstr(ds, "set(");
369 format_odp_key_attr(nl_attr_get(a), ds);
370 ds_put_cstr(ds, ")");
064af421 371 break;
fea393b1
BP		 372 case OVS_ACTION_ATTR_PUSH_VLAN:
373 vlan = nl_attr_get(a);
374 ds_put_cstr(ds, "push_vlan(");
375 if (vlan->vlan_tpid != htons(ETH_TYPE_VLAN)) {
376 ds_put_format(ds, "tpid=0x%04"PRIx16",", ntohs(vlan->vlan_tpid));
377 }
8ddc056d
BP		 378 format_vlan_tci(ds, vlan->vlan_tci);
379 ds_put_char(ds, ')');
064af421 380 break;
fea393b1
BP		 381 case OVS_ACTION_ATTR_POP_VLAN:
382 ds_put_cstr(ds, "pop_vlan");
064af421 383 break;
b02475c5
SH		 384 case OVS_ACTION_ATTR_PUSH_MPLS: {
385 const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
386 ds_put_cstr(ds, "push_mpls(");
387 format_mpls_lse(ds, mpls->mpls_lse);
388 ds_put_format(ds, ",eth_type=0x%"PRIx16")", ntohs(mpls->mpls_ethertype));
389 break;
390 }
391 case OVS_ACTION_ATTR_POP_MPLS: {
392 ovs_be16 ethertype = nl_attr_get_be16(a);
393 ds_put_format(ds, "pop_mpls(eth_type=0x%"PRIx16")", ntohs(ethertype));
394 break;
395 }
6ff686f2
PS		 396 case OVS_ACTION_ATTR_SAMPLE:
397 format_odp_sample_action(ds, a);
398 break;
4edb9ae9
PS		 399 case OVS_ACTION_ATTR_UNSPEC:
400 case __OVS_ACTION_ATTR_MAX:
064af421 401 default:
cdee00fd 402 format_generic_odp_action(ds, a);
064af421
BP		 403 break;
404 }
405}
406
407void
cdee00fd 408format_odp_actions(struct ds *ds, const struct nlattr *actions,
cf22f8cb 409 size_t actions_len)
064af421 410{
cdee00fd
BP		 411 if (actions_len) {
412 const struct nlattr *a;
413 unsigned int left;
414
415 NL_ATTR_FOR_EACH (a, left, actions, actions_len) {
416 if (a != actions) {
417 ds_put_char(ds, ',');
418 }
419 format_odp_action(ds, a);
064af421 420 }
cdee00fd 421 if (left) {
3a8cfc50
BP		 422 int i;
423
3476fce3
BP		 424 if (left == actions_len) {
425 ds_put_cstr(ds, "<empty>");
426 }
3a8cfc50
BP		 427 ds_put_format(ds, ",***%u leftover bytes*** (", left);
428 for (i = 0; i < left; i++) {
429 ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
430 }
431 ds_put_char(ds, ')');
cdee00fd
BP		 432 }
433 } else {
064af421
BP		 434 ds_put_cstr(ds, "drop");
435 }
436}
7202cbe5
BP		 437
438static int
44bac24b 439parse_odp_action(const char *s, const struct simap *port_names,
7202cbe5
BP		 440 struct ofpbuf *actions)
441{
442 /* Many of the sscanf calls in this function use oversized destination
443 * fields because some sscanf() implementations truncate the range of %i
444 * directives, so that e.g. "%"SCNi16 interprets input of "0xfedc" as a
445 * value of 0x7fff. The other alternatives are to allow only a single
446 * radix (e.g. decimal or hexadecimal) or to write more sophisticated
447 * parsers.
448 *
449 * The tun_id parser has to use an alternative approach because there is no
450 * type larger than 64 bits. */
451
452 {
453 unsigned long long int port;
454 int n = -1;
455
456 if (sscanf(s, "%lli%n", &port, &n) > 0 && n > 0) {
457 nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, port);
458 return n;
459 }
460 }
461
462 if (port_names) {
463 int len = strcspn(s, delimiters);
44bac24b 464 struct simap_node *node;
7202cbe5 465
44bac24b 466 node = simap_find_len(port_names, s, len);
7202cbe5 467 if (node) {
44bac24b 468 nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, node->data);
7202cbe5
BP		 469 return len;
470 }
471 }
472
473 {
474 unsigned long long int pid;
36fc5f18 475 unsigned long long int output;
29089a54
RL		 476 unsigned long long int probability;
477 unsigned long long int collector_set_id;
478 unsigned long long int obs_domain_id;
479 unsigned long long int obs_point_id;
7202cbe5
BP		 480 int vid, pcp;
481 int n = -1;
482
483 if (sscanf(s, "userspace(pid=%lli)%n", &pid, &n) > 0 && n > 0) {
e995e3df 484 odp_put_userspace_action(pid, NULL, 0, actions);
7202cbe5 485 return n;
6a7e895f
BP		 486 } else if (sscanf(s, "userspace(pid=%lli,sFlow(vid=%i,"
487 "pcp=%i,output=%lli))%n",
36fc5f18 488 &pid, &vid, &pcp, &output, &n) > 0 && n > 0) {
1673e0e4 489 union user_action_cookie cookie;
7202cbe5
BP		 490 uint16_t tci;
491
492 tci = vid | (pcp << VLAN_PCP_SHIFT);
493 if (tci) {
494 tci |= VLAN_CFI;
495 }
496
497 cookie.type = USER_ACTION_COOKIE_SFLOW;
1673e0e4
BP		 498 cookie.sflow.vlan_tci = htons(tci);
499 cookie.sflow.output = output;
29089a54
RL		 500 odp_put_userspace_action(pid, &cookie, sizeof cookie.sflow,
501 actions);
6a7e895f 502 return n;
ec956fc7 503 } else if (sscanf(s, "userspace(pid=%lli,slow_path%n", &pid, &n) > 0
6a7e895f
BP		 504 && n > 0) {
505 union user_action_cookie cookie;
ec956fc7 506 int res;
6a7e895f
BP		 507
508 cookie.type = USER_ACTION_COOKIE_SLOW_PATH;
509 cookie.slow_path.unused = 0;
510 cookie.slow_path.reason = 0;
511
ec956fc7
PS		 512 res = parse_flags(&s[n], slow_path_reason_to_string,
513 &cookie.slow_path.reason);
514 if (res < 0) {
515 return res;
6a7e895f 516 }
ec956fc7
PS		 517 n += res;
518 if (s[n] != ')') {
6a7e895f
BP		 519 return -EINVAL;
520 }
ec956fc7 521 n++;
6a7e895f 522
29089a54
RL		 523 odp_put_userspace_action(pid, &cookie, sizeof cookie.slow_path,
524 actions);
525 return n;
526 } else if (sscanf(s, "userspace(pid=%lli,flow_sample(probability=%lli,"
527 "collector_set_id=%lli,obs_domain_id=%lli,"
528 "obs_point_id=%lli))%n",
529 &pid, &probability, &collector_set_id,
530 &obs_domain_id, &obs_point_id, &n) > 0 && n > 0) {
531 union user_action_cookie cookie;
532
533 cookie.type = USER_ACTION_COOKIE_FLOW_SAMPLE;
534 cookie.flow_sample.probability = probability;
535 cookie.flow_sample.collector_set_id = collector_set_id;
536 cookie.flow_sample.obs_domain_id = obs_domain_id;
537 cookie.flow_sample.obs_point_id = obs_point_id;
538 odp_put_userspace_action(pid, &cookie, sizeof cookie.flow_sample,
539 actions);
7202cbe5 540 return n;
29089a54
RL		 541 } else if (sscanf(s, "userspace(pid=%lli,ipfix)%n", &pid, &n) > 0
542 && n > 0) {
543 union user_action_cookie cookie;
7202cbe5 544
29089a54
RL		 545 cookie.type = USER_ACTION_COOKIE_IPFIX;
546 odp_put_userspace_action(pid, &cookie, sizeof cookie.ipfix,
e995e3df 547 actions);
7202cbe5 548 return n;
e995e3df
BP		 549 } else if (sscanf(s, "userspace(pid=%lli,userdata(%n", &pid, &n) > 0
550 && n > 0) {
551 struct ofpbuf buf;
552 char *end;
553
554 ofpbuf_init(&buf, 16);
555 end = ofpbuf_put_hex(&buf, &s[n], NULL);
556 if (end[0] == ')' && end[1] == ')') {
557 odp_put_userspace_action(pid, buf.data, buf.size, actions);
558 ofpbuf_uninit(&buf);
559 return (end + 2) - s;
560 }
7202cbe5
BP		 561 }
562 }
563
564 if (!strncmp(s, "set(", 4)) {
565 size_t start_ofs;
566 int retval;
567
568 start_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SET);
569 retval = parse_odp_key_attr(s + 4, port_names, actions);
570 if (retval < 0) {
571 return retval;
572 }
573 if (s[retval + 4] != ')') {
574 return -EINVAL;
575 }
576 nl_msg_end_nested(actions, start_ofs);
577 return retval + 5;
578 }
579
becffb86
BP		 580 {
581 struct ovs_action_push_vlan push;
582 int tpid = ETH_TYPE_VLAN;
583 int vid, pcp;
584 int cfi = 1;
585 int n = -1;
7202cbe5 586
becffb86
BP		 587 if ((sscanf(s, "push_vlan(vid=%i,pcp=%i)%n", &vid, &pcp, &n) > 0
588 && n > 0)
589 || (sscanf(s, "push_vlan(vid=%i,pcp=%i,cfi=%i)%n",
590 &vid, &pcp, &cfi, &n) > 0 && n > 0)
591 || (sscanf(s, "push_vlan(tpid=%i,vid=%i,pcp=%i)%n",
592 &tpid, &vid, &pcp, &n) > 0 && n > 0)
593 || (sscanf(s, "push_vlan(tpid=%i,vid=%i,pcp=%i,cfi=%i)%n",
594 &tpid, &vid, &pcp, &cfi, &n) > 0 && n > 0)) {
595 push.vlan_tpid = htons(tpid);
596 push.vlan_tci = htons((vid << VLAN_VID_SHIFT)
597 | (pcp << VLAN_PCP_SHIFT)
598 | (cfi ? VLAN_CFI : 0));
599 nl_msg_put_unspec(actions, OVS_ACTION_ATTR_PUSH_VLAN,
600 &push, sizeof push);
601
602 return n;
7202cbe5 603 }
7202cbe5
BP		 604 }
605
becffb86
BP		 606 if (!strncmp(s, "pop_vlan", 8)) {
607 nl_msg_put_flag(actions, OVS_ACTION_ATTR_POP_VLAN);
608 return 8;
7202cbe5
BP		 609 }
610
611 {
612 double percentage;
613 int n = -1;
614
615 if (sscanf(s, "sample(sample=%lf%%,actions(%n", &percentage, &n) > 0
616 && percentage >= 0. && percentage <= 100.0
617 && n > 0) {
618 size_t sample_ofs, actions_ofs;
619 double probability;
620
621 probability = floor(UINT32_MAX * (percentage / 100.0) + .5);
622 sample_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SAMPLE);
623 nl_msg_put_u32(actions, OVS_SAMPLE_ATTR_PROBABILITY,
624 (probability <= 0 ? 0
625 : probability >= UINT32_MAX ? UINT32_MAX
626 : probability));
627
628 actions_ofs = nl_msg_start_nested(actions,
629 OVS_SAMPLE_ATTR_ACTIONS);
630 for (;;) {
631 int retval;
632
79d4ffe2 633 n += strspn(s + n, delimiters);
7202cbe5
BP		 634 if (s[n] == ')') {
635 break;
636 }
637
638 retval = parse_odp_action(s + n, port_names, actions);
639 if (retval < 0) {
640 return retval;
641 }
642 n += retval;
7202cbe5
BP		 643 }
644 nl_msg_end_nested(actions, actions_ofs);
645 nl_msg_end_nested(actions, sample_ofs);
646
647 return s[n + 1] == ')' ? n + 2 : -EINVAL;
648 }
649 }
650
651 return -EINVAL;
652}
653
654/* Parses the string representation of datapath actions, in the format output
655 * by format_odp_action(). Returns 0 if successful, otherwise a positive errno
656 * value. On success, the ODP actions are appended to 'actions' as a series of
657 * Netlink attributes. On failure, no data is appended to 'actions'. Either
658 * way, 'actions''s data might be reallocated. */
659int
44bac24b 660odp_actions_from_string(const char *s, const struct simap *port_names,
7202cbe5
BP		 661 struct ofpbuf *actions)
662{
663 size_t old_size;
664
665 if (!strcasecmp(s, "drop")) {
666 return 0;
667 }
668
669 old_size = actions->size;
670 for (;;) {
671 int retval;
672
673 s += strspn(s, delimiters);
674 if (!*s) {
675 return 0;
676 }
677
678 retval = parse_odp_action(s, port_names, actions);
679 if (retval < 0 || !strchr(delimiters, s[retval])) {
680 actions->size = old_size;
681 return -retval;
682 }
683 s += retval;
684 }
685
686 return 0;
687}
14608a15 688\f
36956a7d 689/* Returns the correct length of the payload for a flow key attribute of the
fea393b1
BP		 690 * specified 'type', -1 if 'type' is unknown, or -2 if the attribute's payload
691 * is variable length. */
36956a7d
BP		 692static int
693odp_flow_key_attr_len(uint16_t type)
694{
df2c07f4 695 if (type > OVS_KEY_ATTR_MAX) {
36956a7d
BP		 696 return -1;
697 }
698
09ded0ad 699 switch ((enum ovs_key_attr) type) {
fea393b1 700 case OVS_KEY_ATTR_ENCAP: return -2;
abff858b 701 case OVS_KEY_ATTR_PRIORITY: return 4;
72e8bf28 702 case OVS_KEY_ATTR_SKB_MARK: return 4;
9b405f1a 703 case OVS_KEY_ATTR_TUNNEL: return -2;
df2c07f4
JP		 704 case OVS_KEY_ATTR_IN_PORT: return 4;
705 case OVS_KEY_ATTR_ETHERNET: return sizeof(struct ovs_key_ethernet);
fea393b1 706 case OVS_KEY_ATTR_VLAN: return sizeof(ovs_be16);
df2c07f4 707 case OVS_KEY_ATTR_ETHERTYPE: return 2;
b02475c5 708 case OVS_KEY_ATTR_MPLS: return sizeof(struct ovs_key_mpls);
df2c07f4
JP		 709 case OVS_KEY_ATTR_IPV4: return sizeof(struct ovs_key_ipv4);
710 case OVS_KEY_ATTR_IPV6: return sizeof(struct ovs_key_ipv6);
711 case OVS_KEY_ATTR_TCP: return sizeof(struct ovs_key_tcp);
712 case OVS_KEY_ATTR_UDP: return sizeof(struct ovs_key_udp);
713 case OVS_KEY_ATTR_ICMP: return sizeof(struct ovs_key_icmp);
714 case OVS_KEY_ATTR_ICMPV6: return sizeof(struct ovs_key_icmpv6);
715 case OVS_KEY_ATTR_ARP: return sizeof(struct ovs_key_arp);
716 case OVS_KEY_ATTR_ND: return sizeof(struct ovs_key_nd);
717
718 case OVS_KEY_ATTR_UNSPEC:
719 case __OVS_KEY_ATTR_MAX:
36956a7d
BP		 720 return -1;
721 }
722
723 return -1;
724}
725
36956a7d
BP		 726static void
727format_generic_odp_key(const struct nlattr *a, struct ds *ds)
728{
729 size_t len = nl_attr_get_size(a);
36956a7d
BP		 730 if (len) {
731 const uint8_t *unspec;
732 unsigned int i;
733
734 unspec = nl_attr_get(a);
735 for (i = 0; i < len; i++) {
736 ds_put_char(ds, i ? ' ': '(');
737 ds_put_format(ds, "%02x", unspec[i]);
738 }
739 ds_put_char(ds, ')');
740 }
741}
742
7257b535
BP		 743static const char *
744ovs_frag_type_to_string(enum ovs_frag_type type)
745{
746 switch (type) {
747 case OVS_FRAG_TYPE_NONE:
748 return "no";
749 case OVS_FRAG_TYPE_FIRST:
750 return "first";
751 case OVS_FRAG_TYPE_LATER:
752 return "later";
753 case __OVS_FRAG_TYPE_MAX:
754 default:
755 return "<error>";
756 }
757}
758
9b405f1a
PS		 759static int
760tunnel_key_attr_len(int type)
29c7a2b2 761{
9b405f1a
PS		 762 switch (type) {
763 case OVS_TUNNEL_KEY_ATTR_ID: return 8;
764 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: return 4;
765 case OVS_TUNNEL_KEY_ATTR_IPV4_DST: return 4;
766 case OVS_TUNNEL_KEY_ATTR_TOS: return 1;
767 case OVS_TUNNEL_KEY_ATTR_TTL: return 1;
768 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: return 0;
769 case OVS_TUNNEL_KEY_ATTR_CSUM: return 0;
770 case __OVS_TUNNEL_KEY_ATTR_MAX:
771 return -1;
29c7a2b2 772 }
9b405f1a
PS		 773 return -1;
774}
775
776static enum odp_key_fitness
777tun_key_from_attr(const struct nlattr *attr, struct flow_tnl *tun)
778{
779 unsigned int left;
780 const struct nlattr *a;
781 bool ttl = false;
782 bool unknown = false;
783
784 NL_NESTED_FOR_EACH(a, left, attr) {
785 uint16_t type = nl_attr_type(a);
786 size_t len = nl_attr_get_size(a);
787 int expected_len = tunnel_key_attr_len(type);
788
789 if (len != expected_len && expected_len >= 0) {
790 return ODP_FIT_ERROR;
791 }
792
793 switch (type) {
794 case OVS_TUNNEL_KEY_ATTR_ID:
795 tun->tun_id = nl_attr_get_be64(a);
796 tun->flags |= FLOW_TNL_F_KEY;
797 break;
798 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
799 tun->ip_src = nl_attr_get_be32(a);
800 break;
801 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
802 tun->ip_dst = nl_attr_get_be32(a);
803 break;
804 case OVS_TUNNEL_KEY_ATTR_TOS:
805 tun->ip_tos = nl_attr_get_u8(a);
806 break;
807 case OVS_TUNNEL_KEY_ATTR_TTL:
808 tun->ip_ttl = nl_attr_get_u8(a);
809 ttl = true;
810 break;
811 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
812 tun->flags |= FLOW_TNL_F_DONT_FRAGMENT;
813 break;
814 case OVS_TUNNEL_KEY_ATTR_CSUM:
815 tun->flags |= FLOW_TNL_F_CSUM;
816 break;
817 default:
818 /* Allow this to show up as unexpected, if there are unknown
819 * tunnel attribute, eventually resulting in ODP_FIT_TOO_MUCH. */
820 unknown = true;
821 break;
822 }
823 }
824
825 if (!ttl) {
826 return ODP_FIT_ERROR;
827 }
828 if (unknown) {
829 return ODP_FIT_TOO_MUCH;
830 }
831 return ODP_FIT_PERFECT;
832}
833
834static void
835tun_key_to_attr(struct ofpbuf *a, const struct flow_tnl *tun_key)
836{
837 size_t tun_key_ofs;
838
839 tun_key_ofs = nl_msg_start_nested(a, OVS_KEY_ATTR_TUNNEL);
840
841 if (tun_key->flags & FLOW_TNL_F_KEY) {
842 nl_msg_put_be64(a, OVS_TUNNEL_KEY_ATTR_ID, tun_key->tun_id);
843 }
844 if (tun_key->ip_src) {
845 nl_msg_put_be32(a, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, tun_key->ip_src);
846 }
847 if (tun_key->ip_dst) {
848 nl_msg_put_be32(a, OVS_TUNNEL_KEY_ATTR_IPV4_DST, tun_key->ip_dst);
849 }
850 if (tun_key->ip_tos) {
851 nl_msg_put_u8(a, OVS_TUNNEL_KEY_ATTR_TOS, tun_key->ip_tos);
852 }
853 nl_msg_put_u8(a, OVS_TUNNEL_KEY_ATTR_TTL, tun_key->ip_ttl);
854 if (tun_key->flags & FLOW_TNL_F_DONT_FRAGMENT) {
855 nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT);
856 }
857 if (tun_key->flags & FLOW_TNL_F_CSUM) {
858 nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_CSUM);
859 }
860
861 nl_msg_end_nested(a, tun_key_ofs);
29c7a2b2
PS		 862}
863
36956a7d
BP		 864static void
865format_odp_key_attr(const struct nlattr *a, struct ds *ds)
866{
df2c07f4 867 const struct ovs_key_ethernet *eth_key;
df2c07f4
JP		 868 const struct ovs_key_ipv4 *ipv4_key;
869 const struct ovs_key_ipv6 *ipv6_key;
870 const struct ovs_key_tcp *tcp_key;
871 const struct ovs_key_udp *udp_key;
872 const struct ovs_key_icmp *icmp_key;
873 const struct ovs_key_icmpv6 *icmpv6_key;
874 const struct ovs_key_arp *arp_key;
875 const struct ovs_key_nd *nd_key;
9b405f1a 876 struct flow_tnl tun_key;
7a8e9ed2 877 enum ovs_key_attr attr = nl_attr_type(a);
fea393b1 878 int expected_len;
36956a7d 879
b3b5bf02 880 ds_put_cstr(ds, ovs_key_attr_to_string(attr));
fea393b1
BP		 881 expected_len = odp_flow_key_attr_len(nl_attr_type(a));
882 if (expected_len != -2 && nl_attr_get_size(a) != expected_len) {
b3b5bf02 883 ds_put_format(ds, "(bad length %zu, expected %d)",
36956a7d
BP		 884 nl_attr_get_size(a),
885 odp_flow_key_attr_len(nl_attr_type(a)));
886 format_generic_odp_key(a, ds);
887 return;
888 }
889
7a8e9ed2 890 switch (attr) {
fea393b1
BP		 891 case OVS_KEY_ATTR_ENCAP:
892 ds_put_cstr(ds, "(");
893 if (nl_attr_get_size(a)) {
894 odp_flow_key_format(nl_attr_get(a), nl_attr_get_size(a), ds);
895 }
896 ds_put_char(ds, ')');
897 break;
898
abff858b 899 case OVS_KEY_ATTR_PRIORITY:
1b567fb9 900 ds_put_format(ds, "(%#"PRIx32")", nl_attr_get_u32(a));
abff858b
PS		 901 break;
902
72e8bf28 903 case OVS_KEY_ATTR_SKB_MARK:
1b567fb9 904 ds_put_format(ds, "(%#"PRIx32")", nl_attr_get_u32(a));
72e8bf28
AA		 905 break;
906
9b405f1a
PS		 907 case OVS_KEY_ATTR_TUNNEL:
908 memset(&tun_key, 0, sizeof tun_key);
909 if (tun_key_from_attr(a, &tun_key) == ODP_FIT_ERROR) {
910 ds_put_format(ds, "(error)");
911 } else {
912 ds_put_format(ds, "(tun_id=0x%"PRIx64",src="IP_FMT",dst="IP_FMT","
913 "tos=0x%"PRIx8",ttl=%"PRIu8",flags(",
914 ntohll(tun_key.tun_id),
915 IP_ARGS(tun_key.ip_src),
916 IP_ARGS(tun_key.ip_dst),
917 tun_key.ip_tos, tun_key.ip_ttl);
918
919 format_flags(ds, flow_tun_flag_to_string,
920 (uint32_t) tun_key.flags, ',');
921 ds_put_format(ds, "))");
922 }
356af50b
KM		 923 break;
924
df2c07f4 925 case OVS_KEY_ATTR_IN_PORT:
b3b5bf02 926 ds_put_format(ds, "(%"PRIu32")", nl_attr_get_u32(a));
36956a7d
BP		 927 break;
928
df2c07f4 929 case OVS_KEY_ATTR_ETHERNET:
36956a7d 930 eth_key = nl_attr_get(a);
b3b5bf02 931 ds_put_format(ds, "(src="ETH_ADDR_FMT",dst="ETH_ADDR_FMT")",
36956a7d
BP		 932 ETH_ADDR_ARGS(eth_key->eth_src),
933 ETH_ADDR_ARGS(eth_key->eth_dst));
934 break;
935
fea393b1 936 case OVS_KEY_ATTR_VLAN:
8ddc056d
BP		 937 ds_put_char(ds, '(');
938 format_vlan_tci(ds, nl_attr_get_be16(a));
939 ds_put_char(ds, ')');
36956a7d
BP		 940 break;
941
b02475c5
SH		 942 case OVS_KEY_ATTR_MPLS: {
943 const struct ovs_key_mpls *mpls_key = nl_attr_get(a);
944 ds_put_char(ds, '(');
20131cef 945 format_mpls_lse(ds, mpls_key->mpls_lse);
b02475c5
SH		 946 ds_put_char(ds, ')');
947 break;
948 }
949
df2c07f4 950 case OVS_KEY_ATTR_ETHERTYPE:
b3b5bf02 951 ds_put_format(ds, "(0x%04"PRIx16")",
36956a7d
BP		 952 ntohs(nl_attr_get_be16(a)));
953 break;
954
df2c07f4 955 case OVS_KEY_ATTR_IPV4:
36956a7d 956 ipv4_key = nl_attr_get(a);
b3b5bf02 957 ds_put_format(ds, "(src="IP_FMT",dst="IP_FMT",proto=%"PRIu8
a61680c6 958 ",tos=%#"PRIx8",ttl=%"PRIu8",frag=%s)",
ed36537e
BP		 959 IP_ARGS(ipv4_key->ipv4_src),
960 IP_ARGS(ipv4_key->ipv4_dst),
7257b535 961 ipv4_key->ipv4_proto, ipv4_key->ipv4_tos,
a61680c6 962 ipv4_key->ipv4_ttl,
7257b535 963 ovs_frag_type_to_string(ipv4_key->ipv4_frag));
36956a7d
BP		 964 break;
965
df2c07f4 966 case OVS_KEY_ATTR_IPV6: {
d31f1109
JP		 967 char src_str[INET6_ADDRSTRLEN];
968 char dst_str[INET6_ADDRSTRLEN];
969
970 ipv6_key = nl_attr_get(a);
971 inet_ntop(AF_INET6, ipv6_key->ipv6_src, src_str, sizeof src_str);
972 inet_ntop(AF_INET6, ipv6_key->ipv6_dst, dst_str, sizeof dst_str);
973
b3b5bf02 974 ds_put_format(ds, "(src=%s,dst=%s,label=%#"PRIx32",proto=%"PRIu8
60258dcb 975 ",tclass=%#"PRIx8",hlimit=%"PRIu8",frag=%s)",
fa8223b7 976 src_str, dst_str, ntohl(ipv6_key->ipv6_label),
60258dcb 977 ipv6_key->ipv6_proto, ipv6_key->ipv6_tclass,
a61680c6 978 ipv6_key->ipv6_hlimit,
7257b535 979 ovs_frag_type_to_string(ipv6_key->ipv6_frag));
d31f1109
JP		 980 break;
981 }
982
df2c07f4 983 case OVS_KEY_ATTR_TCP:
36956a7d 984 tcp_key = nl_attr_get(a);
b3b5bf02 985 ds_put_format(ds, "(src=%"PRIu16",dst=%"PRIu16")",
36956a7d
BP		 986 ntohs(tcp_key->tcp_src), ntohs(tcp_key->tcp_dst));
987 break;
988
df2c07f4 989 case OVS_KEY_ATTR_UDP:
36956a7d 990 udp_key = nl_attr_get(a);
b3b5bf02 991 ds_put_format(ds, "(src=%"PRIu16",dst=%"PRIu16")",
36956a7d
BP		 992 ntohs(udp_key->udp_src), ntohs(udp_key->udp_dst));
993 break;
994
df2c07f4 995 case OVS_KEY_ATTR_ICMP:
36956a7d 996 icmp_key = nl_attr_get(a);
b3b5bf02 997 ds_put_format(ds, "(type=%"PRIu8",code=%"PRIu8")",
36956a7d
BP		 998 icmp_key->icmp_type, icmp_key->icmp_code);
999 break;
1000
df2c07f4 1001 case OVS_KEY_ATTR_ICMPV6:
d31f1109 1002 icmpv6_key = nl_attr_get(a);
b3b5bf02 1003 ds_put_format(ds, "(type=%"PRIu8",code=%"PRIu8")",
d31f1109
JP		 1004 icmpv6_key->icmpv6_type, icmpv6_key->icmpv6_code);
1005 break;
1006
df2c07f4 1007 case OVS_KEY_ATTR_ARP:
36956a7d 1008 arp_key = nl_attr_get(a);
b3b5bf02 1009 ds_put_format(ds, "(sip="IP_FMT",tip="IP_FMT",op=%"PRIu16","
bad68a99 1010 "sha="ETH_ADDR_FMT",tha="ETH_ADDR_FMT")",
ed36537e 1011 IP_ARGS(arp_key->arp_sip), IP_ARGS(arp_key->arp_tip),
bad68a99
JP		 1012 ntohs(arp_key->arp_op), ETH_ADDR_ARGS(arp_key->arp_sha),
1013 ETH_ADDR_ARGS(arp_key->arp_tha));
36956a7d
BP		 1014 break;
1015
df2c07f4 1016 case OVS_KEY_ATTR_ND: {
685a51a5
JP		 1017 char target[INET6_ADDRSTRLEN];
1018
1019 nd_key = nl_attr_get(a);
1020 inet_ntop(AF_INET6, nd_key->nd_target, target, sizeof target);
1021
b3b5bf02 1022 ds_put_format(ds, "(target=%s", target);
685a51a5
JP		 1023 if (!eth_addr_is_zero(nd_key->nd_sll)) {
1024 ds_put_format(ds, ",sll="ETH_ADDR_FMT,
1025 ETH_ADDR_ARGS(nd_key->nd_sll));
1026 }
1027 if (!eth_addr_is_zero(nd_key->nd_tll)) {
1028 ds_put_format(ds, ",tll="ETH_ADDR_FMT,
1029 ETH_ADDR_ARGS(nd_key->nd_tll));
1030 }
1031 ds_put_char(ds, ')');
1032 break;
1033 }
1034
7a8e9ed2
BP		 1035 case OVS_KEY_ATTR_UNSPEC:
1036 case __OVS_KEY_ATTR_MAX:
36956a7d
BP		 1037 default:
1038 format_generic_odp_key(a, ds);
1039 break;
1040 }
1041}
1042
1043/* Appends to 'ds' a string representation of the 'key_len' bytes of
df2c07f4 1044 * OVS_KEY_ATTR_* attributes in 'key'. */
14608a15 1045void
36956a7d 1046odp_flow_key_format(const struct nlattr *key, size_t key_len, struct ds *ds)
14608a15 1047{
36956a7d
BP		 1048 if (key_len) {
1049 const struct nlattr *a;
1050 unsigned int left;
1051
1052 NL_ATTR_FOR_EACH (a, left, key, key_len) {
1053 if (a != key) {
1054 ds_put_char(ds, ',');
1055 }
1056 format_odp_key_attr(a, ds);
1057 }
1058 if (left) {
3a8cfc50
BP		 1059 int i;
1060
36956a7d
BP		 1061 if (left == key_len) {
1062 ds_put_cstr(ds, "<empty>");
1063 }
3a8cfc50
BP		 1064 ds_put_format(ds, ",***%u leftover bytes*** (", left);
1065 for (i = 0; i < left; i++) {
1066 ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
1067 }
1068 ds_put_char(ds, ')');
36956a7d
BP		 1069 }
1070 } else {
1071 ds_put_cstr(ds, "<empty>");
1072 }
14608a15 1073}
064af421 1074
3bffc610
BP		 1075static int
1076put_nd_key(int n, const char *nd_target_s,
1077 const uint8_t *nd_sll, const uint8_t *nd_tll, struct ofpbuf *key)
1078{
df2c07f4 1079 struct ovs_key_nd nd_key;
3bffc610
BP		 1080
1081 memset(&nd_key, 0, sizeof nd_key);
1082 if (inet_pton(AF_INET6, nd_target_s, nd_key.nd_target) != 1) {
1083 return -EINVAL;
1084 }
1085 if (nd_sll) {
1086 memcpy(nd_key.nd_sll, nd_sll, ETH_ADDR_LEN);
1087 }
1088 if (nd_tll) {
1089 memcpy(nd_key.nd_tll, nd_tll, ETH_ADDR_LEN);
1090 }
df2c07f4 1091 nl_msg_put_unspec(key, OVS_KEY_ATTR_ND, &nd_key, sizeof nd_key);
3bffc610
BP		 1092 return n;
1093}
1094
7257b535
BP		 1095static bool
1096ovs_frag_type_from_string(const char *s, enum ovs_frag_type *type)
1097{
1098 if (!strcasecmp(s, "no")) {
1099 *type = OVS_FRAG_TYPE_NONE;
1100 } else if (!strcasecmp(s, "first")) {
1101 *type = OVS_FRAG_TYPE_FIRST;
1102 } else if (!strcasecmp(s, "later")) {
1103 *type = OVS_FRAG_TYPE_LATER;
1104 } else {
1105 return false;
1106 }
1107 return true;
1108}
1109
b02475c5
SH		 1110static ovs_be32
1111mpls_lse_from_components(int mpls_label, int mpls_tc, int mpls_ttl, int mpls_bos)
1112{
1113 return (htonl((mpls_label << MPLS_LABEL_SHIFT) |
1114 (mpls_tc << MPLS_TC_SHIFT) |
1115 (mpls_ttl << MPLS_TTL_SHIFT) |
1116 (mpls_bos << MPLS_BOS_SHIFT)));
1117}
1118
3bffc610 1119static int
44bac24b 1120parse_odp_key_attr(const char *s, const struct simap *port_names,
b2a60db8 1121 struct ofpbuf *key)
3bffc610
BP		 1122{
1123 /* Many of the sscanf calls in this function use oversized destination
1124 * fields because some sscanf() implementations truncate the range of %i
1125 * directives, so that e.g. "%"SCNi16 interprets input of "0xfedc" as a
1126 * value of 0x7fff. The other alternatives are to allow only a single
1127 * radix (e.g. decimal or hexadecimal) or to write more sophisticated
1128 * parsers.
1129 *
1130 * The tun_id parser has to use an alternative approach because there is no
1131 * type larger than 64 bits. */
1132
abff858b
PS		 1133 {
1134 unsigned long long int priority;
1135 int n = -1;
1136
1b567fb9 1137 if (sscanf(s, "skb_priority(%llx)%n", &priority, &n) > 0 && n > 0) {
abff858b
PS		 1138 nl_msg_put_u32(key, OVS_KEY_ATTR_PRIORITY, priority);
1139 return n;
1140 }
1141 }
1142
72e8bf28
AA		 1143 {
1144 unsigned long long int mark;
1145 int n = -1;
1146
1b567fb9 1147 if (sscanf(s, "skb_mark(%llx)%n", &mark, &n) > 0 && n > 0) {
72e8bf28
AA		 1148 nl_msg_put_u32(key, OVS_KEY_ATTR_SKB_MARK, mark);
1149 return n;
1150 }
1151 }
1152
35651d6a
JG		 1153 {
1154 char tun_id_s[32];
35651d6a 1155 int tos, ttl;
9b405f1a 1156 struct flow_tnl tun_key;
35651d6a
JG		 1157 int n = -1;
1158
9b405f1a 1159 if (sscanf(s, "tunnel(tun_id=%31[x0123456789abcdefABCDEF],"
29c7a2b2
PS		 1160 "src="IP_SCAN_FMT",dst="IP_SCAN_FMT
1161 ",tos=%i,ttl=%i,flags%n", tun_id_s,
9b405f1a
PS		 1162 IP_SCAN_ARGS(&tun_key.ip_src),
1163 IP_SCAN_ARGS(&tun_key.ip_dst), &tos, &ttl,
35651d6a 1164 &n) > 0 && n > 0) {
29c7a2b2 1165 int res;
9b405f1a 1166 uint32_t flags;
29c7a2b2 1167
35651d6a 1168 tun_key.tun_id = htonll(strtoull(tun_id_s, NULL, 0));
9b405f1a
PS		 1169 tun_key.ip_tos = tos;
1170 tun_key.ip_ttl = ttl;
1171 res = parse_flags(&s[n], flow_tun_flag_to_string, &flags);
1172 tun_key.flags = (uint16_t) flags;
29c7a2b2 1173
29c7a2b2
PS		 1174 if (res < 0) {
1175 return res;
1176 }
1177 n += res;
1178 if (s[n] != ')') {
1179 return -EINVAL;
1180 }
1181 n++;
9b405f1a 1182 tun_key_to_attr(key, &tun_key);
35651d6a
JG		 1183 return n;
1184 }
1185 }
1186
3bffc610
BP		 1187 {
1188 unsigned long long int in_port;
1189 int n = -1;
1190
1191 if (sscanf(s, "in_port(%lli)%n", &in_port, &n) > 0 && n > 0) {
df2c07f4 1192 nl_msg_put_u32(key, OVS_KEY_ATTR_IN_PORT, in_port);
3bffc610
BP		 1193 return n;
1194 }
1195 }
1196
b2a60db8
BP		 1197 if (port_names && !strncmp(s, "in_port(", 8)) {
1198 const char *name;
44bac24b 1199 const struct simap_node *node;
b2a60db8
BP		 1200 int name_len;
1201
1202 name = s + 8;
1203 name_len = strcspn(s, ")");
44bac24b 1204 node = simap_find_len(port_names, name, name_len);
b2a60db8 1205 if (node) {
44bac24b 1206 nl_msg_put_u32(key, OVS_KEY_ATTR_IN_PORT, node->data);
b2a60db8
BP		 1207 return 8 + name_len + 1;
1208 }
1209 }
1210
3bffc610 1211 {
df2c07f4 1212 struct ovs_key_ethernet eth_key;
3bffc610
BP		 1213 int n = -1;
1214
1215 if (sscanf(s,
1216 "eth(src="ETH_ADDR_SCAN_FMT",dst="ETH_ADDR_SCAN_FMT")%n",
1217 ETH_ADDR_SCAN_ARGS(eth_key.eth_src),
1218 ETH_ADDR_SCAN_ARGS(eth_key.eth_dst), &n) > 0 && n > 0) {
df2c07f4 1219 nl_msg_put_unspec(key, OVS_KEY_ATTR_ETHERNET,
3bffc610
BP		 1220 &eth_key, sizeof eth_key);
1221 return n;
1222 }
1223 }
1224
1225 {
3bffc610
BP		 1226 uint16_t vid;
1227 int pcp;
8ddc056d 1228 int cfi;
3bffc610
BP		 1229 int n = -1;
1230
fea393b1
BP		 1231 if ((sscanf(s, "vlan(vid=%"SCNi16",pcp=%i)%n", &vid, &pcp, &n) > 0
1232 && n > 0)) {
1233 nl_msg_put_be16(key, OVS_KEY_ATTR_VLAN,
1234 htons((vid << VLAN_VID_SHIFT) |
8ddc056d
BP		 1235 (pcp << VLAN_PCP_SHIFT) |
1236 VLAN_CFI));
1237 return n;
1238 } else if ((sscanf(s, "vlan(vid=%"SCNi16",pcp=%i,cfi=%i)%n",
1239 &vid, &pcp, &cfi, &n) > 0
1240 && n > 0)) {
1241 nl_msg_put_be16(key, OVS_KEY_ATTR_VLAN,
1242 htons((vid << VLAN_VID_SHIFT) |
1243 (pcp << VLAN_PCP_SHIFT) |
1244 (cfi ? VLAN_CFI : 0)));
3bffc610
BP		 1245 return n;
1246 }
1247 }
1248
1249 {
fac2e516 1250 int eth_type;
3bffc610
BP		 1251 int n = -1;
1252
fac2e516 1253 if (sscanf(s, "eth_type(%i)%n", &eth_type, &n) > 0 && n > 0) {
df2c07f4 1254 nl_msg_put_be16(key, OVS_KEY_ATTR_ETHERTYPE, htons(eth_type));
3bffc610
BP		 1255 return n;
1256 }
1257 }
1258
b02475c5
SH		 1259 {
1260 int label, tc, ttl, bos;
1261 int n = -1;
1262
1263 if (sscanf(s, "mpls(label=%"SCNi32",tc=%i,ttl=%i,bos=%i)%n",
1264 &label, &tc, &ttl, &bos, &n) > 0 &&
1265 n > 0) {
1266 struct ovs_key_mpls *mpls;
1267
1268 mpls = nl_msg_put_unspec_uninit(key, OVS_KEY_ATTR_MPLS,
1269 sizeof *mpls);
20131cef 1270 mpls->mpls_lse = mpls_lse_from_components(label, tc, ttl, bos);
b02475c5
SH		 1271 return n;
1272 }
1273 }
1274
3bffc610
BP		 1275 {
1276 ovs_be32 ipv4_src;
1277 ovs_be32 ipv4_dst;
1278 int ipv4_proto;
1279 int ipv4_tos;
a61680c6 1280 int ipv4_ttl;
7257b535
BP		 1281 char frag[8];
1282 enum ovs_frag_type ipv4_frag;
3bffc610
BP		 1283 int n = -1;
1284
1285 if (sscanf(s, "ipv4(src="IP_SCAN_FMT",dst="IP_SCAN_FMT","
a61680c6 1286 "proto=%i,tos=%i,ttl=%i,frag=%7[a-z])%n",
7257b535 1287 IP_SCAN_ARGS(&ipv4_src), IP_SCAN_ARGS(&ipv4_dst),
a61680c6 1288 &ipv4_proto, &ipv4_tos, &ipv4_ttl, frag, &n) > 0
7257b535
BP		 1289 && n > 0
1290 && ovs_frag_type_from_string(frag, &ipv4_frag)) {
df2c07f4 1291 struct ovs_key_ipv4 ipv4_key;
3bffc610 1292
3bffc610
BP		 1293 ipv4_key.ipv4_src = ipv4_src;
1294 ipv4_key.ipv4_dst = ipv4_dst;
1295 ipv4_key.ipv4_proto = ipv4_proto;
1296 ipv4_key.ipv4_tos = ipv4_tos;
a61680c6 1297 ipv4_key.ipv4_ttl = ipv4_ttl;
7257b535 1298 ipv4_key.ipv4_frag = ipv4_frag;
df2c07f4 1299 nl_msg_put_unspec(key, OVS_KEY_ATTR_IPV4,
3bffc610
BP		 1300 &ipv4_key, sizeof ipv4_key);
1301 return n;
1302 }
1303 }
1304
1305 {
1306 char ipv6_src_s[IPV6_SCAN_LEN + 1];
1307 char ipv6_dst_s[IPV6_SCAN_LEN + 1];
fa8223b7 1308 int ipv6_label;
3bffc610 1309 int ipv6_proto;
60258dcb 1310 int ipv6_tclass;
a61680c6 1311 int ipv6_hlimit;
7257b535
BP		 1312 char frag[8];
1313 enum ovs_frag_type ipv6_frag;
3bffc610
BP		 1314 int n = -1;
1315
1316 if (sscanf(s, "ipv6(src="IPV6_SCAN_FMT",dst="IPV6_SCAN_FMT","
60258dcb 1317 "label=%i,proto=%i,tclass=%i,hlimit=%i,frag=%7[a-z])%n",
fa8223b7 1318 ipv6_src_s, ipv6_dst_s, &ipv6_label,
60258dcb 1319 &ipv6_proto, &ipv6_tclass, &ipv6_hlimit, frag, &n) > 0
7257b535
BP		 1320 && n > 0
1321 && ovs_frag_type_from_string(frag, &ipv6_frag)) {
df2c07f4 1322 struct ovs_key_ipv6 ipv6_key;
3bffc610 1323
3bffc610
BP		 1324 if (inet_pton(AF_INET6, ipv6_src_s, &ipv6_key.ipv6_src) != 1 ||
1325 inet_pton(AF_INET6, ipv6_dst_s, &ipv6_key.ipv6_dst) != 1) {
1326 return -EINVAL;
1327 }
fa8223b7 1328 ipv6_key.ipv6_label = htonl(ipv6_label);
3bffc610 1329 ipv6_key.ipv6_proto = ipv6_proto;
60258dcb 1330 ipv6_key.ipv6_tclass = ipv6_tclass;
a61680c6 1331 ipv6_key.ipv6_hlimit = ipv6_hlimit;
7257b535 1332 ipv6_key.ipv6_frag = ipv6_frag;
df2c07f4 1333 nl_msg_put_unspec(key, OVS_KEY_ATTR_IPV6,
3bffc610
BP		 1334 &ipv6_key, sizeof ipv6_key);
1335 return n;
1336 }
1337 }
1338
1339 {
1340 int tcp_src;
1341 int tcp_dst;
1342 int n = -1;
1343
1344 if (sscanf(s, "tcp(src=%i,dst=%i)%n",&tcp_src, &tcp_dst, &n) > 0
1345 && n > 0) {
df2c07f4 1346 struct ovs_key_tcp tcp_key;
3bffc610
BP		 1347
1348 tcp_key.tcp_src = htons(tcp_src);
1349 tcp_key.tcp_dst = htons(tcp_dst);
df2c07f4 1350 nl_msg_put_unspec(key, OVS_KEY_ATTR_TCP, &tcp_key, sizeof tcp_key);
3bffc610
BP		 1351 return n;
1352 }
1353 }
1354
1355 {
1356 int udp_src;
1357 int udp_dst;
1358 int n = -1;
1359
1360 if (sscanf(s, "udp(src=%i,dst=%i)%n", &udp_src, &udp_dst, &n) > 0
1361 && n > 0) {
df2c07f4 1362 struct ovs_key_udp udp_key;
3bffc610
BP		 1363
1364 udp_key.udp_src = htons(udp_src);
1365 udp_key.udp_dst = htons(udp_dst);
df2c07f4 1366 nl_msg_put_unspec(key, OVS_KEY_ATTR_UDP, &udp_key, sizeof udp_key);
3bffc610
BP		 1367 return n;
1368 }
1369 }
1370
1371 {
1372 int icmp_type;
1373 int icmp_code;
1374 int n = -1;
1375
1376 if (sscanf(s, "icmp(type=%i,code=%i)%n",
1377 &icmp_type, &icmp_code, &n) > 0
1378 && n > 0) {
df2c07f4 1379 struct ovs_key_icmp icmp_key;
3bffc610
BP		 1380
1381 icmp_key.icmp_type = icmp_type;
1382 icmp_key.icmp_code = icmp_code;
df2c07f4 1383 nl_msg_put_unspec(key, OVS_KEY_ATTR_ICMP,
3bffc610
BP		 1384 &icmp_key, sizeof icmp_key);
1385 return n;
1386 }
1387 }
1388
1389 {
df2c07f4 1390 struct ovs_key_icmpv6 icmpv6_key;
3bffc610
BP		 1391 int n = -1;
1392
1393 if (sscanf(s, "icmpv6(type=%"SCNi8",code=%"SCNi8")%n",
1394 &icmpv6_key.icmpv6_type, &icmpv6_key.icmpv6_code,&n) > 0
1395 && n > 0) {
df2c07f4 1396 nl_msg_put_unspec(key, OVS_KEY_ATTR_ICMPV6,
3bffc610
BP		 1397 &icmpv6_key, sizeof icmpv6_key);
1398 return n;
1399 }
1400 }
1401
1402 {
1403 ovs_be32 arp_sip;
1404 ovs_be32 arp_tip;
1405 int arp_op;
1406 uint8_t arp_sha[ETH_ADDR_LEN];
1407 uint8_t arp_tha[ETH_ADDR_LEN];
1408 int n = -1;
1409
1410 if (sscanf(s, "arp(sip="IP_SCAN_FMT",tip="IP_SCAN_FMT","
1411 "op=%i,sha="ETH_ADDR_SCAN_FMT",tha="ETH_ADDR_SCAN_FMT")%n",
1412 IP_SCAN_ARGS(&arp_sip),
1413 IP_SCAN_ARGS(&arp_tip),
1414 &arp_op,
1415 ETH_ADDR_SCAN_ARGS(arp_sha),
1416 ETH_ADDR_SCAN_ARGS(arp_tha), &n) > 0 && n > 0) {
df2c07f4 1417 struct ovs_key_arp arp_key;
3bffc610
BP		 1418
1419 memset(&arp_key, 0, sizeof arp_key);
1420 arp_key.arp_sip = arp_sip;
1421 arp_key.arp_tip = arp_tip;
1422 arp_key.arp_op = htons(arp_op);
1423 memcpy(arp_key.arp_sha, arp_sha, ETH_ADDR_LEN);
1424 memcpy(arp_key.arp_tha, arp_tha, ETH_ADDR_LEN);
df2c07f4 1425 nl_msg_put_unspec(key, OVS_KEY_ATTR_ARP, &arp_key, sizeof arp_key);
3bffc610
BP		 1426 return n;
1427 }
1428 }
1429
1430 {
1431 char nd_target_s[IPV6_SCAN_LEN + 1];
1432 uint8_t nd_sll[ETH_ADDR_LEN];
1433 uint8_t nd_tll[ETH_ADDR_LEN];
1434 int n = -1;
1435
1436 if (sscanf(s, "nd(target="IPV6_SCAN_FMT")%n",
1437 nd_target_s, &n) > 0 && n > 0) {
1438 return put_nd_key(n, nd_target_s, NULL, NULL, key);
1439 }
1440 if (sscanf(s, "nd(target="IPV6_SCAN_FMT",sll="ETH_ADDR_SCAN_FMT")%n",
1441 nd_target_s, ETH_ADDR_SCAN_ARGS(nd_sll), &n) > 0
1442 && n > 0) {
1443 return put_nd_key(n, nd_target_s, nd_sll, NULL, key);
1444 }
1445 if (sscanf(s, "nd(target="IPV6_SCAN_FMT",tll="ETH_ADDR_SCAN_FMT")%n",
1446 nd_target_s, ETH_ADDR_SCAN_ARGS(nd_tll), &n) > 0
1447 && n > 0) {
1448 return put_nd_key(n, nd_target_s, NULL, nd_tll, key);
1449 }
1450 if (sscanf(s, "nd(target="IPV6_SCAN_FMT",sll="ETH_ADDR_SCAN_FMT","
1451 "tll="ETH_ADDR_SCAN_FMT")%n",
1452 nd_target_s, ETH_ADDR_SCAN_ARGS(nd_sll),
1453 ETH_ADDR_SCAN_ARGS(nd_tll), &n) > 0
1454 && n > 0) {
1455 return put_nd_key(n, nd_target_s, nd_sll, nd_tll, key);
1456 }
1457 }
1458
fea393b1
BP		 1459 if (!strncmp(s, "encap(", 6)) {
1460 const char *start = s;
1461 size_t encap;
1462
1463 encap = nl_msg_start_nested(key, OVS_KEY_ATTR_ENCAP);
1464
1465 s += 6;
1466 for (;;) {
1467 int retval;
1468
1469 s += strspn(s, ", \t\r\n");
1470 if (!*s) {
1471 return -EINVAL;
1472 } else if (*s == ')') {
1473 break;
1474 }
1475
becffb86 1476 retval = parse_odp_key_attr(s, port_names, key);
fea393b1
BP		 1477 if (retval < 0) {
1478 return retval;
1479 }
1480 s += retval;
1481 }
1482 s++;
1483
1484 nl_msg_end_nested(key, encap);
1485
1486 return s - start;
1487 }
1488
3bffc610
BP		 1489 return -EINVAL;
1490}
1491
df2c07f4
JP		 1492/* Parses the string representation of a datapath flow key, in the
1493 * format output by odp_flow_key_format(). Returns 0 if successful,
1494 * otherwise a positive errno value. On success, the flow key is
1495 * appended to 'key' as a series of Netlink attributes. On failure, no
1496 * data is appended to 'key'. Either way, 'key''s data might be
1497 * reallocated.
3bffc610 1498 *
44bac24b
BP		 1499 * If 'port_names' is nonnull, it points to an simap that maps from a port name
1500 * to a port number. (Port names may be used instead of port numbers in
1501 * in_port.)
b2a60db8 1502 *
3bffc610
BP		 1503 * On success, the attributes appended to 'key' are individually syntactically
1504 * valid, but they may not be valid as a sequence. 'key' might, for example,
34118cae 1505 * have duplicated keys. odp_flow_key_to_flow() will detect those errors. */
3bffc610 1506int
44bac24b 1507odp_flow_key_from_string(const char *s, const struct simap *port_names,
b2a60db8 1508 struct ofpbuf *key)
3bffc610
BP		 1509{
1510 const size_t old_size = key->size;
1511 for (;;) {
1512 int retval;
1513
7202cbe5 1514 s += strspn(s, delimiters);
3bffc610
BP		 1515 if (!*s) {
1516 return 0;
1517 }
1518
b2a60db8 1519 retval = parse_odp_key_attr(s, port_names, key);
3bffc610
BP		 1520 if (retval < 0) {
1521 key->size = old_size;
1522 return -retval;
1523 }
1524 s += retval;
1525 }
1526
1527 return 0;
1528}
1529
7257b535 1530static uint8_t
c4f2731d 1531ovs_to_odp_frag(uint8_t nw_frag)
7257b535 1532{
c4f2731d
PS		 1533 return (nw_frag == 0 ? OVS_FRAG_TYPE_NONE
1534 : nw_frag == FLOW_NW_FRAG_ANY ? OVS_FRAG_TYPE_FIRST
1535 : OVS_FRAG_TYPE_LATER);
7257b535
BP		 1536}
1537
2508ac16 1538/* Appends a representation of 'flow' as OVS_KEY_ATTR_* attributes to 'buf'.
ddbfda84
JP		 1539 * 'flow->in_port' is ignored (since it is likely to be an OpenFlow port
1540 * number rather than a datapath port number). Instead, if 'odp_in_port'
1541 * is anything other than OVSP_NONE, it is included in 'buf' as the input
1542 * port.
2508ac16
BP		 1543 *
1544 * 'buf' must have at least ODPUTIL_FLOW_KEY_BYTES bytes of space, or be
1545 * capable of being expanded to allow for that much space. */
14608a15 1546void
ddbfda84
JP		 1547odp_flow_key_from_flow(struct ofpbuf *buf, const struct flow *flow,
1548 uint32_t odp_in_port)
14608a15 1549{
df2c07f4 1550 struct ovs_key_ethernet *eth_key;
fea393b1 1551 size_t encap;
36956a7d 1552
deedf7e7
BP		 1553 if (flow->skb_priority) {
1554 nl_msg_put_u32(buf, OVS_KEY_ATTR_PRIORITY, flow->skb_priority);
abff858b
PS		 1555 }
1556
05fb0928 1557 if (flow->tunnel.ip_dst) {
9b405f1a 1558 tun_key_to_attr(buf, &flow->tunnel);
36956a7d
BP		 1559 }
1560
72e8bf28
AA		 1561 if (flow->skb_mark) {
1562 nl_msg_put_u32(buf, OVS_KEY_ATTR_SKB_MARK, flow->skb_mark);
1563 }
1564
ddbfda84
JP		 1565 if (odp_in_port != OVSP_NONE) {
1566 nl_msg_put_u32(buf, OVS_KEY_ATTR_IN_PORT, odp_in_port);
18886b60 1567 }
36956a7d 1568
df2c07f4 1569 eth_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ETHERNET,
36956a7d
BP		 1570 sizeof *eth_key);
1571 memcpy(eth_key->eth_src, flow->dl_src, ETH_ADDR_LEN);
1572 memcpy(eth_key->eth_dst, flow->dl_dst, ETH_ADDR_LEN);
1573
8ddc056d 1574 if (flow->vlan_tci != htons(0) || flow->dl_type == htons(ETH_TYPE_VLAN)) {
fea393b1 1575 nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, htons(ETH_TYPE_VLAN));
8ddc056d 1576 nl_msg_put_be16(buf, OVS_KEY_ATTR_VLAN, flow->vlan_tci);
fea393b1 1577 encap = nl_msg_start_nested(buf, OVS_KEY_ATTR_ENCAP);
8ddc056d
BP		 1578 if (flow->vlan_tci == htons(0)) {
1579 goto unencap;
1580 }
fea393b1
BP		 1581 } else {
1582 encap = 0;
36956a7d
BP		 1583 }
1584
1585 if (ntohs(flow->dl_type) < ETH_TYPE_MIN) {
fea393b1 1586 goto unencap;
36956a7d
BP		 1587 }
1588
df2c07f4 1589 nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, flow->dl_type);
36956a7d
BP		 1590
1591 if (flow->dl_type == htons(ETH_TYPE_IP)) {
df2c07f4 1592 struct ovs_key_ipv4 *ipv4_key;
36956a7d 1593
df2c07f4 1594 ipv4_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_IPV4,
36956a7d
BP		 1595 sizeof *ipv4_key);
1596 ipv4_key->ipv4_src = flow->nw_src;
1597 ipv4_key->ipv4_dst = flow->nw_dst;
1598 ipv4_key->ipv4_proto = flow->nw_proto;
eadef313 1599 ipv4_key->ipv4_tos = flow->nw_tos;
a61680c6 1600 ipv4_key->ipv4_ttl = flow->nw_ttl;
eadef313 1601 ipv4_key->ipv4_frag = ovs_to_odp_frag(flow->nw_frag);
d31f1109 1602 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
df2c07f4 1603 struct ovs_key_ipv6 *ipv6_key;
d31f1109 1604
df2c07f4 1605 ipv6_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_IPV6,
d31f1109
JP		 1606 sizeof *ipv6_key);
1607 memcpy(ipv6_key->ipv6_src, &flow->ipv6_src, sizeof ipv6_key->ipv6_src);
1608 memcpy(ipv6_key->ipv6_dst, &flow->ipv6_dst, sizeof ipv6_key->ipv6_dst);
fa8223b7 1609 ipv6_key->ipv6_label = flow->ipv6_label;
d31f1109 1610 ipv6_key->ipv6_proto = flow->nw_proto;
eadef313 1611 ipv6_key->ipv6_tclass = flow->nw_tos;
a61680c6 1612 ipv6_key->ipv6_hlimit = flow->nw_ttl;
eadef313 1613 ipv6_key->ipv6_frag = ovs_to_odp_frag(flow->nw_frag);
8087f5ff
MM		 1614 } else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
1615 flow->dl_type == htons(ETH_TYPE_RARP)) {
df2c07f4 1616 struct ovs_key_arp *arp_key;
d31f1109 1617
df2c07f4 1618 arp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ARP,
d31f1109 1619 sizeof *arp_key);
535d6987 1620 memset(arp_key, 0, sizeof *arp_key);
d31f1109
JP		 1621 arp_key->arp_sip = flow->nw_src;
1622 arp_key->arp_tip = flow->nw_dst;
1623 arp_key->arp_op = htons(flow->nw_proto);
1624 memcpy(arp_key->arp_sha, flow->arp_sha, ETH_ADDR_LEN);
1625 memcpy(arp_key->arp_tha, flow->arp_tha, ETH_ADDR_LEN);
1626 }
b53055f4 1627
b02475c5
SH		 1628 if (flow->mpls_depth) {
1629 struct ovs_key_mpls *mpls_key;
1630
1631 mpls_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_MPLS,
1632 sizeof *mpls_key);
20131cef 1633 mpls_key->mpls_lse = flow->mpls_lse;
b02475c5
SH		 1634 }
1635
48cecbdc 1636 if (is_ip_any(flow) && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
6767a2cc 1637 if (flow->nw_proto == IPPROTO_TCP) {
df2c07f4 1638 struct ovs_key_tcp *tcp_key;
36956a7d 1639
df2c07f4 1640 tcp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_TCP,
36956a7d
BP		 1641 sizeof *tcp_key);
1642 tcp_key->tcp_src = flow->tp_src;
1643 tcp_key->tcp_dst = flow->tp_dst;
6767a2cc 1644 } else if (flow->nw_proto == IPPROTO_UDP) {
df2c07f4 1645 struct ovs_key_udp *udp_key;
36956a7d 1646
df2c07f4 1647 udp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_UDP,
36956a7d
BP		 1648 sizeof *udp_key);
1649 udp_key->udp_src = flow->tp_src;
1650 udp_key->udp_dst = flow->tp_dst;
d31f1109
JP		 1651 } else if (flow->dl_type == htons(ETH_TYPE_IP)
1652 && flow->nw_proto == IPPROTO_ICMP) {
df2c07f4 1653 struct ovs_key_icmp *icmp_key;
36956a7d 1654
df2c07f4 1655 icmp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ICMP,
36956a7d
BP		 1656 sizeof *icmp_key);
1657 icmp_key->icmp_type = ntohs(flow->tp_src);
1658 icmp_key->icmp_code = ntohs(flow->tp_dst);
d31f1109
JP		 1659 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)
1660 && flow->nw_proto == IPPROTO_ICMPV6) {
df2c07f4 1661 struct ovs_key_icmpv6 *icmpv6_key;
d31f1109 1662
df2c07f4 1663 icmpv6_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ICMPV6,
d31f1109
JP		 1664 sizeof *icmpv6_key);
1665 icmpv6_key->icmpv6_type = ntohs(flow->tp_src);
1666 icmpv6_key->icmpv6_code = ntohs(flow->tp_dst);
685a51a5
JP		 1667
1668 if (icmpv6_key->icmpv6_type == ND_NEIGHBOR_SOLICIT
1669 || icmpv6_key->icmpv6_type == ND_NEIGHBOR_ADVERT) {
df2c07f4 1670 struct ovs_key_nd *nd_key;
685a51a5 1671
df2c07f4 1672 nd_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ND,
685a51a5
JP		 1673 sizeof *nd_key);
1674 memcpy(nd_key->nd_target, &flow->nd_target,
1675 sizeof nd_key->nd_target);
1676 memcpy(nd_key->nd_sll, flow->arp_sha, ETH_ADDR_LEN);
1677 memcpy(nd_key->nd_tll, flow->arp_tha, ETH_ADDR_LEN);
1678 }
36956a7d 1679 }
36956a7d 1680 }
fea393b1
BP		 1681
1682unencap:
1683 if (encap) {
1684 nl_msg_end_nested(buf, encap);
1685 }
36956a7d
BP		 1686}
1687
b0f7b9b5
BP		 1688uint32_t
1689odp_flow_key_hash(const struct nlattr *key, size_t key_len)
1690{
1691 BUILD_ASSERT_DECL(!(NLA_ALIGNTO % sizeof(uint32_t)));
1692 return hash_words((const uint32_t *) key, key_len / sizeof(uint32_t), 0);
1693}
1694
34118cae
BP		 1695static void
1696log_odp_key_attributes(struct vlog_rate_limit *rl, const char *title,
b0f7b9b5 1697 uint64_t attrs, int out_of_range_attr,
34118cae
BP		 1698 const struct nlattr *key, size_t key_len)
1699{
1700 struct ds s;
1701 int i;
1702
b0f7b9b5 1703 if (VLOG_DROP_DBG(rl)) {
34118cae
BP		 1704 return;
1705 }
1706
1707 ds_init(&s);
b0f7b9b5
BP		 1708 for (i = 0; i < 64; i++) {
1709 if (attrs & (UINT64_C(1) << i)) {
34118cae
BP		 1710 ds_put_format(&s, " %s", ovs_key_attr_to_string(i));
1711 }
1712 }
b0f7b9b5
BP		 1713 if (out_of_range_attr) {
1714 ds_put_format(&s, " %d (and possibly others)", out_of_range_attr);
1715 }
34118cae
BP		 1716
1717 ds_put_cstr(&s, ": ");
1718 odp_flow_key_format(key, key_len, &s);
1719
b0f7b9b5 1720 VLOG_DBG("%s:%s", title, ds_cstr(&s));
34118cae
BP		 1721 ds_destroy(&s);
1722}
1723
7257b535 1724static bool
9e44d715 1725odp_to_ovs_frag(uint8_t odp_frag, struct flow *flow)
7257b535 1726{
34118cae
BP		 1727 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1728
9e44d715 1729 if (odp_frag > OVS_FRAG_TYPE_LATER) {
b0f7b9b5 1730 VLOG_ERR_RL(&rl, "invalid frag %"PRIu8" in flow key", odp_frag);
7257b535
BP		 1731 return false;
1732 }
1733
7257b535 1734 if (odp_frag != OVS_FRAG_TYPE_NONE) {
eadef313 1735 flow->nw_frag |= FLOW_NW_FRAG_ANY;
7257b535 1736 if (odp_frag == OVS_FRAG_TYPE_LATER) {
eadef313 1737 flow->nw_frag |= FLOW_NW_FRAG_LATER;
7257b535
BP		 1738 }
1739 }
1740 return true;
1741}
1742
b0f7b9b5 1743static bool
fea393b1 1744parse_flow_nlattrs(const struct nlattr *key, size_t key_len,
b0f7b9b5
BP		 1745 const struct nlattr *attrs[], uint64_t *present_attrsp,
1746 int *out_of_range_attrp)
36956a7d 1747{
b0f7b9b5 1748 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
36956a7d 1749 const struct nlattr *nla;
34118cae 1750 uint64_t present_attrs;
36956a7d
BP		 1751 size_t left;
1752
2aef1214 1753 BUILD_ASSERT(OVS_KEY_ATTR_MAX < CHAR_BIT * sizeof present_attrs);
34118cae 1754 present_attrs = 0;
b0f7b9b5 1755 *out_of_range_attrp = 0;
36956a7d 1756 NL_ATTR_FOR_EACH (nla, left, key, key_len) {
34118cae
BP		 1757 uint16_t type = nl_attr_type(nla);
1758 size_t len = nl_attr_get_size(nla);
1759 int expected_len = odp_flow_key_attr_len(type);
1760
b0f7b9b5
BP		 1761 if (len != expected_len && expected_len >= 0) {
1762 VLOG_ERR_RL(&rl, "attribute %s has length %zu but should have "
1763 "length %d", ovs_key_attr_to_string(type),
1764 len, expected_len);
1765 return false;
34118cae
BP		 1766 }
1767
2aef1214 1768 if (type > OVS_KEY_ATTR_MAX) {
b0f7b9b5
BP		 1769 *out_of_range_attrp = type;
1770 } else {
1771 if (present_attrs & (UINT64_C(1) << type)) {
1772 VLOG_ERR_RL(&rl, "duplicate %s attribute in flow key",
1773 ovs_key_attr_to_string(type));
1774 return false;
1775 }
1776
1777 present_attrs |= UINT64_C(1) << type;
1778 attrs[type] = nla;
1779 }
34118cae
BP		 1780 }
1781 if (left) {
1782 VLOG_ERR_RL(&rl, "trailing garbage in flow key");
b0f7b9b5 1783 return false;
34118cae
BP		 1784 }
1785
fea393b1 1786 *present_attrsp = present_attrs;
b0f7b9b5 1787 return true;
fea393b1
BP		 1788}
1789
b0f7b9b5
BP		 1790static enum odp_key_fitness
1791check_expectations(uint64_t present_attrs, int out_of_range_attr,
1792 uint64_t expected_attrs,
fea393b1
BP		 1793 const struct nlattr *key, size_t key_len)
1794{
1795 uint64_t missing_attrs;
1796 uint64_t extra_attrs;
1797
1798 missing_attrs = expected_attrs & ~present_attrs;
1799 if (missing_attrs) {
b0f7b9b5
BP		 1800 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
1801 log_odp_key_attributes(&rl, "expected but not present",
1802 missing_attrs, 0, key, key_len);
1803 return ODP_FIT_TOO_LITTLE;
fea393b1
BP		 1804 }
1805
1806 extra_attrs = present_attrs & ~expected_attrs;
b0f7b9b5
BP		 1807 if (extra_attrs || out_of_range_attr) {
1808 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
1809 log_odp_key_attributes(&rl, "present but not expected",
1810 extra_attrs, out_of_range_attr, key, key_len);
1811 return ODP_FIT_TOO_MUCH;
fea393b1
BP		 1812 }
1813
b0f7b9b5 1814 return ODP_FIT_PERFECT;
fea393b1
BP		 1815}
1816
b0f7b9b5
BP		 1817static bool
1818parse_ethertype(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
1819 uint64_t present_attrs, uint64_t *expected_attrs,
1820 struct flow *flow)
fea393b1
BP		 1821{
1822 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
36956a7d 1823
fea393b1 1824 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE)) {
34118cae
BP		 1825 flow->dl_type = nl_attr_get_be16(attrs[OVS_KEY_ATTR_ETHERTYPE]);
1826 if (ntohs(flow->dl_type) < 1536) {
1827 VLOG_ERR_RL(&rl, "invalid Ethertype %"PRIu16" in flow key",
1828 ntohs(flow->dl_type));
b0f7b9b5 1829 return false;
34118cae 1830 }
b0f7b9b5 1831 *expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE;
34118cae
BP		 1832 } else {
1833 flow->dl_type = htons(FLOW_DL_TYPE_NONE);
1834 }
b0f7b9b5
BP		 1835 return true;
1836}
1837
1838static enum odp_key_fitness
b02475c5
SH		 1839parse_l2_5_onward(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
1840 uint64_t present_attrs, int out_of_range_attr,
1841 uint64_t expected_attrs, struct flow *flow,
1842 const struct nlattr *key, size_t key_len)
b0f7b9b5
BP		 1843{
1844 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
36956a7d 1845
b02475c5 1846 if (eth_type_mpls(flow->dl_type)) {
b02475c5
SH		 1847 expected_attrs |= (UINT64_C(1) << OVS_KEY_ATTR_MPLS);
1848
b02475c5
SH		 1849 if (!(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_MPLS))) {
1850 return ODP_FIT_TOO_LITTLE;
1851 }
1852 flow->mpls_lse = nl_attr_get_be32(attrs[OVS_KEY_ATTR_MPLS]);
1853 flow->mpls_depth++;
cff78c88 1854 } else if (flow->dl_type == htons(ETH_TYPE_IP)) {
34118cae 1855 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV4;
fea393b1 1856 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV4)) {
34118cae 1857 const struct ovs_key_ipv4 *ipv4_key;
36956a7d 1858
34118cae 1859 ipv4_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV4]);
36956a7d
BP		 1860 flow->nw_src = ipv4_key->ipv4_src;
1861 flow->nw_dst = ipv4_key->ipv4_dst;
1862 flow->nw_proto = ipv4_key->ipv4_proto;
eadef313 1863 flow->nw_tos = ipv4_key->ipv4_tos;
a61680c6 1864 flow->nw_ttl = ipv4_key->ipv4_ttl;
9e44d715 1865 if (!odp_to_ovs_frag(ipv4_key->ipv4_frag, flow)) {
b0f7b9b5 1866 return ODP_FIT_ERROR;
36956a7d 1867 }
34118cae 1868 }
cff78c88 1869 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
34118cae 1870 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV6;
fea393b1 1871 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV6)) {
34118cae 1872 const struct ovs_key_ipv6 *ipv6_key;
36956a7d 1873
34118cae 1874 ipv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV6]);
d31f1109
JP		 1875 memcpy(&flow->ipv6_src, ipv6_key->ipv6_src, sizeof flow->ipv6_src);
1876 memcpy(&flow->ipv6_dst, ipv6_key->ipv6_dst, sizeof flow->ipv6_dst);
fa8223b7 1877 flow->ipv6_label = ipv6_key->ipv6_label;
d31f1109 1878 flow->nw_proto = ipv6_key->ipv6_proto;
eadef313 1879 flow->nw_tos = ipv6_key->ipv6_tclass;
a61680c6 1880 flow->nw_ttl = ipv6_key->ipv6_hlimit;
9e44d715 1881 if (!odp_to_ovs_frag(ipv6_key->ipv6_frag, flow)) {
b0f7b9b5 1882 return ODP_FIT_ERROR;
d31f1109 1883 }
34118cae 1884 }
cff78c88
SH		 1885 } else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
1886 flow->dl_type == htons(ETH_TYPE_RARP)) {
34118cae 1887 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ARP;
fea393b1 1888 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ARP)) {
34118cae 1889 const struct ovs_key_arp *arp_key;
d31f1109 1890
34118cae 1891 arp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ARP]);
36956a7d
BP		 1892 flow->nw_src = arp_key->arp_sip;
1893 flow->nw_dst = arp_key->arp_tip;
1894 if (arp_key->arp_op & htons(0xff00)) {
34118cae
BP		 1895 VLOG_ERR_RL(&rl, "unsupported ARP opcode %"PRIu16" in flow "
1896 "key", ntohs(arp_key->arp_op));
b0f7b9b5 1897 return ODP_FIT_ERROR;
36956a7d
BP		 1898 }
1899 flow->nw_proto = ntohs(arp_key->arp_op);
bad68a99
JP		 1900 memcpy(flow->arp_sha, arp_key->arp_sha, ETH_ADDR_LEN);
1901 memcpy(flow->arp_tha, arp_key->arp_tha, ETH_ADDR_LEN);
36956a7d 1902 }
36956a7d 1903 }
36956a7d 1904
34118cae 1905 if (flow->nw_proto == IPPROTO_TCP
cff78c88
SH		 1906 && (flow->dl_type == htons(ETH_TYPE_IP) ||
1907 flow->dl_type == htons(ETH_TYPE_IPV6))
34118cae
BP		 1908 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1909 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TCP;
fea393b1 1910 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TCP)) {
34118cae 1911 const struct ovs_key_tcp *tcp_key;
36956a7d 1912
34118cae
BP		 1913 tcp_key = nl_attr_get(attrs[OVS_KEY_ATTR_TCP]);
1914 flow->tp_src = tcp_key->tcp_src;
1915 flow->tp_dst = tcp_key->tcp_dst;
7257b535 1916 }
34118cae 1917 } else if (flow->nw_proto == IPPROTO_UDP
cff78c88
SH		 1918 && (flow->dl_type == htons(ETH_TYPE_IP) ||
1919 flow->dl_type == htons(ETH_TYPE_IPV6))
34118cae
BP		 1920 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1921 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_UDP;
fea393b1 1922 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_UDP)) {
34118cae
BP		 1923 const struct ovs_key_udp *udp_key;
1924
1925 udp_key = nl_attr_get(attrs[OVS_KEY_ATTR_UDP]);
1926 flow->tp_src = udp_key->udp_src;
1927 flow->tp_dst = udp_key->udp_dst;
d31f1109 1928 }
34118cae 1929 } else if (flow->nw_proto == IPPROTO_ICMP
cff78c88 1930 && flow->dl_type == htons(ETH_TYPE_IP)
34118cae
BP		 1931 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1932 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMP;
fea393b1 1933 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ICMP)) {
34118cae
BP		 1934 const struct ovs_key_icmp *icmp_key;
1935
1936 icmp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMP]);
1937 flow->tp_src = htons(icmp_key->icmp_type);
1938 flow->tp_dst = htons(icmp_key->icmp_code);
685a51a5 1939 }
34118cae 1940 } else if (flow->nw_proto == IPPROTO_ICMPV6
cff78c88 1941 && flow->dl_type == htons(ETH_TYPE_IPV6)
34118cae
BP		 1942 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1943 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMPV6;
fea393b1 1944 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ICMPV6)) {
34118cae
BP		 1945 const struct ovs_key_icmpv6 *icmpv6_key;
1946
1947 icmpv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMPV6]);
1948 flow->tp_src = htons(icmpv6_key->icmpv6_type);
1949 flow->tp_dst = htons(icmpv6_key->icmpv6_code);
685a51a5 1950
34118cae
BP		 1951 if (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
1952 flow->tp_src == htons(ND_NEIGHBOR_ADVERT)) {
1953 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ND;
fea393b1 1954 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ND)) {
34118cae
BP		 1955 const struct ovs_key_nd *nd_key;
1956
1957 nd_key = nl_attr_get(attrs[OVS_KEY_ATTR_ND]);
1958 memcpy(&flow->nd_target, nd_key->nd_target,
1959 sizeof flow->nd_target);
1960 memcpy(flow->arp_sha, nd_key->nd_sll, ETH_ADDR_LEN);
1961 memcpy(flow->arp_tha, nd_key->nd_tll, ETH_ADDR_LEN);
1962 }
1963 }
7257b535 1964 }
34118cae 1965 }
7257b535 1966
b0f7b9b5
BP		 1967 return check_expectations(present_attrs, out_of_range_attr, expected_attrs,
1968 key, key_len);
1969}
1970
1971/* Parse 802.1Q header then encapsulated L3 attributes. */
1972static enum odp_key_fitness
1973parse_8021q_onward(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
1974 uint64_t present_attrs, int out_of_range_attr,
1975 uint64_t expected_attrs, struct flow *flow,
1976 const struct nlattr *key, size_t key_len)
1977{
1978 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1979
1980 const struct nlattr *encap
1981 = (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ENCAP)
1982 ? attrs[OVS_KEY_ATTR_ENCAP] : NULL);
1983 enum odp_key_fitness encap_fitness;
1984 enum odp_key_fitness fitness;
1985 ovs_be16 tci;
1986
1987 /* Calulate fitness of outer attributes. */
1988 expected_attrs |= ((UINT64_C(1) << OVS_KEY_ATTR_VLAN) |
1989 (UINT64_C(1) << OVS_KEY_ATTR_ENCAP));
1990 fitness = check_expectations(present_attrs, out_of_range_attr,
1991 expected_attrs, key, key_len);
1992
1993 /* Get the VLAN TCI value. */
1994 if (!(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_VLAN))) {
1995 return ODP_FIT_TOO_LITTLE;
1996 }
1997 tci = nl_attr_get_be16(attrs[OVS_KEY_ATTR_VLAN]);
1998 if (tci == htons(0)) {
1999 /* Corner case for a truncated 802.1Q header. */
2000 if (fitness == ODP_FIT_PERFECT && nl_attr_get_size(encap)) {
2001 return ODP_FIT_TOO_MUCH;
2002 }
2003 return fitness;
2004 } else if (!(tci & htons(VLAN_CFI))) {
2005 VLOG_ERR_RL(&rl, "OVS_KEY_ATTR_VLAN 0x%04"PRIx16" is nonzero "
2006 "but CFI bit is not set", ntohs(tci));
2007 return ODP_FIT_ERROR;
2008 }
2009
2010 /* Set vlan_tci.
2011 * Remove the TPID from dl_type since it's not the real Ethertype. */
2012 flow->vlan_tci = tci;
2013 flow->dl_type = htons(0);
2014
2015 /* Now parse the encapsulated attributes. */
2016 if (!parse_flow_nlattrs(nl_attr_get(encap), nl_attr_get_size(encap),
2017 attrs, &present_attrs, &out_of_range_attr)) {
2018 return ODP_FIT_ERROR;
2019 }
2020 expected_attrs = 0;
2021
2022 if (!parse_ethertype(attrs, present_attrs, &expected_attrs, flow)) {
2023 return ODP_FIT_ERROR;
2024 }
b02475c5
SH		 2025 encap_fitness = parse_l2_5_onward(attrs, present_attrs, out_of_range_attr,
2026 expected_attrs, flow, key, key_len);
b0f7b9b5
BP		 2027
2028 /* The overall fitness is the worse of the outer and inner attributes. */
2029 return MAX(fitness, encap_fitness);
2030}
2031
2032/* Converts the 'key_len' bytes of OVS_KEY_ATTR_* attributes in 'key' to a flow
2033 * structure in 'flow'. Returns an ODP_FIT_* value that indicates how well
2034 * 'key' fits our expectations for what a flow key should contain.
2035 *
ddbfda84
JP		 2036 * The 'in_port' will be the datapath's understanding of the port. The
2037 * caller will need to translate with odp_port_to_ofp_port() if the
2038 * OpenFlow port is needed.
2039 *
b0f7b9b5
BP		 2040 * This function doesn't take the packet itself as an argument because none of
2041 * the currently understood OVS_KEY_ATTR_* attributes require it. Currently,
2042 * it is always possible to infer which additional attribute(s) should appear
2043 * by looking at the attributes for lower-level protocols, e.g. if the network
2044 * protocol in OVS_KEY_ATTR_IPV4 or OVS_KEY_ATTR_IPV6 is IPPROTO_TCP then we
2045 * know that a OVS_KEY_ATTR_TCP attribute must appear and that otherwise it
2046 * must be absent. */
2047enum odp_key_fitness
2048odp_flow_key_to_flow(const struct nlattr *key, size_t key_len,
2049 struct flow *flow)
2050{
b0f7b9b5
BP		 2051 const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1];
2052 uint64_t expected_attrs;
2053 uint64_t present_attrs;
2054 int out_of_range_attr;
2055
2056 memset(flow, 0, sizeof *flow);
2057
2058 /* Parse attributes. */
2059 if (!parse_flow_nlattrs(key, key_len, attrs, &present_attrs,
2060 &out_of_range_attr)) {
2061 return ODP_FIT_ERROR;
2062 }
2063 expected_attrs = 0;
2064
2065 /* Metadata. */
2066 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_PRIORITY)) {
deedf7e7 2067 flow->skb_priority = nl_attr_get_u32(attrs[OVS_KEY_ATTR_PRIORITY]);
b0f7b9b5
BP		 2068 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_PRIORITY;
2069 }
2070
72e8bf28
AA		 2071 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_SKB_MARK)) {
2072 flow->skb_mark = nl_attr_get_u32(attrs[OVS_KEY_ATTR_SKB_MARK]);
2073 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_SKB_MARK;
2074 }
2075
9b405f1a
PS		 2076 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TUNNEL)) {
2077 enum odp_key_fitness res;
05fb0928 2078
9b405f1a
PS		 2079 res = tun_key_from_attr(attrs[OVS_KEY_ATTR_TUNNEL], &flow->tunnel);
2080 if (res == ODP_FIT_ERROR) {
2081 return ODP_FIT_ERROR;
2082 } else if (res == ODP_FIT_PERFECT) {
2083 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TUNNEL;
05fb0928
JR		 2084 }
2085 }
2086
b0f7b9b5 2087 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IN_PORT)) {
ddbfda84 2088 flow->in_port = nl_attr_get_u32(attrs[OVS_KEY_ATTR_IN_PORT]);
b0f7b9b5
BP		 2089 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IN_PORT;
2090 } else {
ddbfda84 2091 flow->in_port = OVSP_NONE;
b0f7b9b5
BP		 2092 }
2093
2094 /* Ethernet header. */
2095 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ETHERNET)) {
2096 const struct ovs_key_ethernet *eth_key;
2097
2098 eth_key = nl_attr_get(attrs[OVS_KEY_ATTR_ETHERNET]);
2099 memcpy(flow->dl_src, eth_key->eth_src, ETH_ADDR_LEN);
2100 memcpy(flow->dl_dst, eth_key->eth_dst, ETH_ADDR_LEN);
2101 }
2102 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERNET;
2103
2104 /* Get Ethertype or 802.1Q TPID or FLOW_DL_TYPE_NONE. */
2105 if (!parse_ethertype(attrs, present_attrs, &expected_attrs, flow)) {
2106 return ODP_FIT_ERROR;
2107 }
2108
2109 if (flow->dl_type == htons(ETH_TYPE_VLAN)) {
2110 return parse_8021q_onward(attrs, present_attrs, out_of_range_attr,
2111 expected_attrs, flow, key, key_len);
2112 }
b02475c5
SH		 2113 return parse_l2_5_onward(attrs, present_attrs, out_of_range_attr,
2114 expected_attrs, flow, key, key_len);
14608a15 2115}
39db78a0 2116
6814e51f
BP		 2117/* Returns 'fitness' as a string, for use in debug messages. */
2118const char *
2119odp_key_fitness_to_string(enum odp_key_fitness fitness)
2120{
2121 switch (fitness) {
2122 case ODP_FIT_PERFECT:
2123 return "OK";
2124 case ODP_FIT_TOO_MUCH:
2125 return "too_much";
2126 case ODP_FIT_TOO_LITTLE:
2127 return "too_little";
2128 case ODP_FIT_ERROR:
2129 return "error";
2130 default:
2131 return "<unknown>";
2132 }
2133}
2134
39db78a0 2135/* Appends an OVS_ACTION_ATTR_USERSPACE action to 'odp_actions' that specifies
e995e3df
BP		 2136 * Netlink PID 'pid'. If 'userdata' is nonnull, adds a userdata attribute
2137 * whose contents are the 'userdata_size' bytes at 'userdata' and returns the
2138 * offset within 'odp_actions' of the start of the cookie. (If 'userdata' is
2139 * null, then the return value is not meaningful.) */
39db78a0 2140size_t
e995e3df
BP		 2141odp_put_userspace_action(uint32_t pid,
2142 const void *userdata, size_t userdata_size,
39db78a0
BP		 2143 struct ofpbuf *odp_actions)
2144{
e995e3df 2145 size_t userdata_ofs;
39db78a0
BP		 2146 size_t offset;
2147
2148 offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_USERSPACE);
2149 nl_msg_put_u32(odp_actions, OVS_USERSPACE_ATTR_PID, pid);
e995e3df
BP		 2150 if (userdata) {
2151 userdata_ofs = odp_actions->size + NLA_HDRLEN;
39db78a0 2152 nl_msg_put_unspec(odp_actions, OVS_USERSPACE_ATTR_USERDATA,
e995e3df
BP		 2153 userdata, userdata_size);
2154 } else {
2155 userdata_ofs = 0;
39db78a0
BP		 2156 }
2157 nl_msg_end_nested(odp_actions, offset);
2158
e995e3df 2159 return userdata_ofs;
39db78a0 2160}
b9ad7294
EJ		 2161
2162void
2163odp_put_tunnel_action(const struct flow_tnl *tunnel,
2164 struct ofpbuf *odp_actions)
2165{
2166 size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
2167 tun_key_to_attr(odp_actions, tunnel);
2168 nl_msg_end_nested(odp_actions, offset);
2169}
5bbda0aa
EJ		 2170\f
2171/* The commit_odp_actions() function and its helpers. */
2172
2173static void
2174commit_set_action(struct ofpbuf *odp_actions, enum ovs_key_attr key_type,
2175 const void *key, size_t key_size)
2176{
2177 size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
2178 nl_msg_put_unspec(odp_actions, key_type, key, key_size);
2179 nl_msg_end_nested(odp_actions, offset);
2180}
2181
09a0d2e7
AA		 2182void
2183odp_put_skb_mark_action(const uint32_t skb_mark,
2184 struct ofpbuf *odp_actions)
2185{
2186 commit_set_action(odp_actions, OVS_KEY_ATTR_SKB_MARK, &skb_mark,
2187 sizeof(skb_mark));
2188}
2189
b9ad7294
EJ		 2190/* If any of the flow key data that ODP actions can modify are different in
2191 * 'base->tunnel' and 'flow->tunnel', appends a set_tunnel ODP action to
2192 * 'odp_actions' that change the flow tunneling information in key from
2193 * 'base->tunnel' into 'flow->tunnel', and then changes 'base->tunnel' in the
2194 * same way. In other words, operates the same as commit_odp_actions(), but
2195 * only on tunneling information. */
2196void
2197commit_odp_tunnel_action(const struct flow *flow, struct flow *base,
5bbda0aa
EJ		 2198 struct ofpbuf *odp_actions)
2199{
05fb0928
JR		 2200 /* A valid IPV4_TUNNEL must have non-zero ip_dst. */
2201 if (flow->tunnel.ip_dst) {
fc80de30
JR		 2202 if (!memcmp(&base->tunnel, &flow->tunnel, sizeof base->tunnel)) {
2203 return;
2204 }
2205 memcpy(&base->tunnel, &flow->tunnel, sizeof base->tunnel);
b9ad7294 2206 odp_put_tunnel_action(&base->tunnel, odp_actions);
05fb0928 2207 }
5bbda0aa
EJ		 2208}
2209
2210static void
2211commit_set_ether_addr_action(const struct flow *flow, struct flow *base,
2212 struct ofpbuf *odp_actions)
2213{
2214 struct ovs_key_ethernet eth_key;
2215
2216 if (eth_addr_equals(base->dl_src, flow->dl_src) &&
2217 eth_addr_equals(base->dl_dst, flow->dl_dst)) {
2218 return;
2219 }
2220
2221 memcpy(base->dl_src, flow->dl_src, ETH_ADDR_LEN);
2222 memcpy(base->dl_dst, flow->dl_dst, ETH_ADDR_LEN);
2223
2224 memcpy(eth_key.eth_src, base->dl_src, ETH_ADDR_LEN);
2225 memcpy(eth_key.eth_dst, base->dl_dst, ETH_ADDR_LEN);
2226
2227 commit_set_action(odp_actions, OVS_KEY_ATTR_ETHERNET,
2228 &eth_key, sizeof(eth_key));
2229}
2230
2231static void
2232commit_vlan_action(const struct flow *flow, struct flow *base,
2233 struct ofpbuf *odp_actions)
2234{
2235 if (base->vlan_tci == flow->vlan_tci) {
2236 return;
2237 }
2238
2239 if (base->vlan_tci & htons(VLAN_CFI)) {
2240 nl_msg_put_flag(odp_actions, OVS_ACTION_ATTR_POP_VLAN);
2241 }
2242
2243 if (flow->vlan_tci & htons(VLAN_CFI)) {
2244 struct ovs_action_push_vlan vlan;
2245
2246 vlan.vlan_tpid = htons(ETH_TYPE_VLAN);
2247 vlan.vlan_tci = flow->vlan_tci;
2248 nl_msg_put_unspec(odp_actions, OVS_ACTION_ATTR_PUSH_VLAN,
2249 &vlan, sizeof vlan);
2250 }
2251 base->vlan_tci = flow->vlan_tci;
2252}
2253
b02475c5
SH		 2254static void
2255commit_mpls_action(const struct flow *flow, struct flow *base,
2256 struct ofpbuf *odp_actions)
2257{
2258 if (flow->mpls_lse == base->mpls_lse &&
2259 flow->mpls_depth == base->mpls_depth) {
2260 return;
2261 }
2262
2263 if (flow->mpls_depth < base->mpls_depth) {
2264 if (base->mpls_depth - flow->mpls_depth > 1) {
2265 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
2266 VLOG_WARN_RL(&rl, "Multiple mpls_pop actions reduced to "
2267 " a single mpls_pop action");
2268 }
2269
2270 nl_msg_put_be16(odp_actions, OVS_ACTION_ATTR_POP_MPLS, flow->dl_type);
2271 } else if (flow->mpls_depth > base->mpls_depth) {
2272 struct ovs_action_push_mpls *mpls;
2273
2274 if (flow->mpls_depth - base->mpls_depth > 1) {
2275 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
2276 VLOG_WARN_RL(&rl, "Multiple mpls_push actions reduced to "
2277 " a single mpls_push action");
2278 }
2279
2280 mpls = nl_msg_put_unspec_uninit(odp_actions, OVS_ACTION_ATTR_PUSH_MPLS,
2281 sizeof *mpls);
2282 memset(mpls, 0, sizeof *mpls);
2283 mpls->mpls_ethertype = flow->dl_type;
2284 mpls->mpls_lse = flow->mpls_lse;
2285 } else {
2286 struct ovs_key_mpls mpls_key;
2287
20131cef 2288 mpls_key.mpls_lse = flow->mpls_lse;
b02475c5
SH		 2289 commit_set_action(odp_actions, OVS_KEY_ATTR_MPLS,
2290 &mpls_key, sizeof(mpls_key));
2291 }
2292
2293 base->dl_type = flow->dl_type;
2294 base->mpls_lse = flow->mpls_lse;
2295 base->mpls_depth = flow->mpls_depth;
2296}
2297
5bbda0aa 2298static void
c4f2731d 2299commit_set_ipv4_action(const struct flow *flow, struct flow *base,
5bbda0aa
EJ		 2300 struct ofpbuf *odp_actions)
2301{
2302 struct ovs_key_ipv4 ipv4_key;
2303
5bbda0aa
EJ		 2304 if (base->nw_src == flow->nw_src &&
2305 base->nw_dst == flow->nw_dst &&
2306 base->nw_tos == flow->nw_tos &&
2307 base->nw_ttl == flow->nw_ttl &&
2308 base->nw_frag == flow->nw_frag) {
2309 return;
2310 }
2311
2312 ipv4_key.ipv4_src = base->nw_src = flow->nw_src;
2313 ipv4_key.ipv4_dst = base->nw_dst = flow->nw_dst;
2314 ipv4_key.ipv4_tos = base->nw_tos = flow->nw_tos;
2315 ipv4_key.ipv4_ttl = base->nw_ttl = flow->nw_ttl;
2316 ipv4_key.ipv4_proto = base->nw_proto;
c4f2731d 2317 ipv4_key.ipv4_frag = ovs_to_odp_frag(base->nw_frag);
5bbda0aa
EJ		 2318
2319 commit_set_action(odp_actions, OVS_KEY_ATTR_IPV4,
2320 &ipv4_key, sizeof(ipv4_key));
2321}
2322
c4f2731d
PS		 2323static void
2324commit_set_ipv6_action(const struct flow *flow, struct flow *base,
2325 struct ofpbuf *odp_actions)
2326{
2327 struct ovs_key_ipv6 ipv6_key;
2328
2329 if (ipv6_addr_equals(&base->ipv6_src, &flow->ipv6_src) &&
2330 ipv6_addr_equals(&base->ipv6_dst, &flow->ipv6_dst) &&
2331 base->ipv6_label == flow->ipv6_label &&
2332 base->nw_tos == flow->nw_tos &&
2333 base->nw_ttl == flow->nw_ttl &&
2334 base->nw_frag == flow->nw_frag) {
2335 return;
2336 }
2337
2338 base->ipv6_src = flow->ipv6_src;
2339 memcpy(&ipv6_key.ipv6_src, &base->ipv6_src, sizeof(ipv6_key.ipv6_src));
2340 base->ipv6_dst = flow->ipv6_dst;
2341 memcpy(&ipv6_key.ipv6_dst, &base->ipv6_dst, sizeof(ipv6_key.ipv6_dst));
2342
2343 ipv6_key.ipv6_label = base->ipv6_label = flow->ipv6_label;
2344 ipv6_key.ipv6_tclass = base->nw_tos = flow->nw_tos;
2345 ipv6_key.ipv6_hlimit = base->nw_ttl = flow->nw_ttl;
2346 ipv6_key.ipv6_proto = base->nw_proto;
2347 ipv6_key.ipv6_frag = ovs_to_odp_frag(base->nw_frag);
2348
2349 commit_set_action(odp_actions, OVS_KEY_ATTR_IPV6,
2350 &ipv6_key, sizeof(ipv6_key));
2351}
2352
2353static void
2354commit_set_nw_action(const struct flow *flow, struct flow *base,
2355 struct ofpbuf *odp_actions)
2356{
2357 /* Check if flow really have an IP header. */
2358 if (!flow->nw_proto) {
2359 return;
2360 }
2361
1b035ef2 2362 if (base->dl_type == htons(ETH_TYPE_IP)) {
c4f2731d 2363 commit_set_ipv4_action(flow, base, odp_actions);
1b035ef2 2364 } else if (base->dl_type == htons(ETH_TYPE_IPV6)) {
c4f2731d
PS		 2365 commit_set_ipv6_action(flow, base, odp_actions);
2366 }
2367}
2368
5bbda0aa
EJ		 2369static void
2370commit_set_port_action(const struct flow *flow, struct flow *base,
2371 struct ofpbuf *odp_actions)
2372{
1b035ef2 2373 if (!is_ip_any(base) || (!base->tp_src && !base->tp_dst)) {
5bbda0aa
EJ		 2374 return;
2375 }
2376
2377 if (base->tp_src == flow->tp_src &&
2378 base->tp_dst == flow->tp_dst) {
2379 return;
2380 }
2381
2382 if (flow->nw_proto == IPPROTO_TCP) {
2383 struct ovs_key_tcp port_key;
2384
2385 port_key.tcp_src = base->tp_src = flow->tp_src;
2386 port_key.tcp_dst = base->tp_dst = flow->tp_dst;
2387
2388 commit_set_action(odp_actions, OVS_KEY_ATTR_TCP,
2389 &port_key, sizeof(port_key));
2390
2391 } else if (flow->nw_proto == IPPROTO_UDP) {
2392 struct ovs_key_udp port_key;
2393
2394 port_key.udp_src = base->tp_src = flow->tp_src;
2395 port_key.udp_dst = base->tp_dst = flow->tp_dst;
2396
2397 commit_set_action(odp_actions, OVS_KEY_ATTR_UDP,
2398 &port_key, sizeof(port_key));
2399 }
2400}
2401
2402static void
2403commit_set_priority_action(const struct flow *flow, struct flow *base,
2404 struct ofpbuf *odp_actions)
2405{
deedf7e7 2406 if (base->skb_priority == flow->skb_priority) {
5bbda0aa
EJ		 2407 return;
2408 }
deedf7e7 2409 base->skb_priority = flow->skb_priority;
5bbda0aa
EJ		 2410
2411 commit_set_action(odp_actions, OVS_KEY_ATTR_PRIORITY,
deedf7e7 2412 &base->skb_priority, sizeof(base->skb_priority));
5bbda0aa
EJ		 2413}
2414
72e8bf28
AA		 2415static void
2416commit_set_skb_mark_action(const struct flow *flow, struct flow *base,
2417 struct ofpbuf *odp_actions)
2418{
2419 if (base->skb_mark == flow->skb_mark) {
2420 return;
2421 }
2422 base->skb_mark = flow->skb_mark;
2423
09a0d2e7 2424 odp_put_skb_mark_action(base->skb_mark, odp_actions);
72e8bf28 2425}
5bbda0aa
EJ		 2426/* If any of the flow key data that ODP actions can modify are different in
2427 * 'base' and 'flow', appends ODP actions to 'odp_actions' that change the flow
b9ad7294
EJ		 2428 * key from 'base' into 'flow', and then changes 'base' the same way. Does not
2429 * commit set_tunnel actions. Users should call commit_odp_tunnel_action()
2430 * in addition to this function if needed. */
5bbda0aa
EJ		 2431void
2432commit_odp_actions(const struct flow *flow, struct flow *base,
2433 struct ofpbuf *odp_actions)
2434{
5bbda0aa
EJ		 2435 commit_set_ether_addr_action(flow, base, odp_actions);
2436 commit_vlan_action(flow, base, odp_actions);
2437 commit_set_nw_action(flow, base, odp_actions);
2438 commit_set_port_action(flow, base, odp_actions);
1b035ef2
SH		 2439 /* Commiting MPLS actions should occur after committing nw and port
2440 * actions. This is because committing MPLS actions may alter a packet so
2441 * that it is no longer IP and thus nw and port actions are no longer valid.
2442 */
2443 commit_mpls_action(flow, base, odp_actions);
5bbda0aa 2444 commit_set_priority_action(flow, base, odp_actions);
72e8bf28 2445 commit_set_skb_mark_action(flow, base, odp_actions);
5bbda0aa 2446}
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