2 * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 #include <arpa/inet.h>
23 #include <netinet/in.h>
24 #include <netinet/icmp6.h>
27 #include "byte-order.h"
29 #include "dynamic-string.h"
39 VLOG_DEFINE_THIS_MODULE(odp_util);
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.
47 /* The set of characters that may separate one action or one key attribute
49 static const char *delimiters = ", \t\r\n";
51 static int parse_odp_key_attr(const char *, const struct simap *port_names,
53 static void format_odp_key_attr(const struct nlattr *a, struct ds *ds);
55 /* Returns one the following for the action with the given OVS_ACTION_ATTR_*
58 * - For an action whose argument has a fixed length, returned that
59 * nonnegative length in bytes.
61 * - For an action with a variable-length argument, returns -2.
63 * - For an invalid 'type', returns -1. */
65 odp_action_len(uint16_t type)
67 if (type > OVS_ACTION_ATTR_MAX) {
71 switch ((enum ovs_action_attr) type) {
72 case OVS_ACTION_ATTR_OUTPUT: return sizeof(uint32_t);
73 case OVS_ACTION_ATTR_USERSPACE: return -2;
74 case OVS_ACTION_ATTR_PUSH_VLAN: return sizeof(struct ovs_action_push_vlan);
75 case OVS_ACTION_ATTR_POP_VLAN: return 0;
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);
78 case OVS_ACTION_ATTR_SET: return -2;
79 case OVS_ACTION_ATTR_SAMPLE: return -2;
81 case OVS_ACTION_ATTR_UNSPEC:
82 case __OVS_ACTION_ATTR_MAX:
90 ovs_key_attr_to_string(enum ovs_key_attr attr)
92 static char unknown_attr[3 + INT_STRLEN(unsigned int) + 1];
95 case OVS_KEY_ATTR_UNSPEC: return "unspec";
96 case OVS_KEY_ATTR_ENCAP: return "encap";
97 case OVS_KEY_ATTR_PRIORITY: return "skb_priority";
98 case OVS_KEY_ATTR_SKB_MARK: return "skb_mark";
99 case OVS_KEY_ATTR_TUNNEL: return "tunnel";
100 case OVS_KEY_ATTR_IN_PORT: return "in_port";
101 case OVS_KEY_ATTR_ETHERNET: return "eth";
102 case OVS_KEY_ATTR_VLAN: return "vlan";
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";
112 case OVS_KEY_ATTR_MPLS: return "mpls";
114 case __OVS_KEY_ATTR_MAX:
116 snprintf(unknown_attr, sizeof unknown_attr, "key%u",
117 (unsigned int) attr);
123 format_generic_odp_action(struct ds *ds, const struct nlattr *a)
125 size_t len = nl_attr_get_size(a);
127 ds_put_format(ds, "action%"PRId16, nl_attr_type(a));
129 const uint8_t *unspec;
132 unspec = nl_attr_get(a);
133 for (i = 0; i < len; i++) {
134 ds_put_char(ds, i ? ' ': '(');
135 ds_put_format(ds, "%02x", unspec[i]);
137 ds_put_char(ds, ')');
142 format_odp_sample_action(struct ds *ds, const struct nlattr *attr)
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 }
148 struct nlattr *a[ARRAY_SIZE(ovs_sample_policy)];
150 const struct nlattr *nla_acts;
153 ds_put_cstr(ds, "sample");
155 if (!nl_parse_nested(attr, ovs_sample_policy, a, ARRAY_SIZE(a))) {
156 ds_put_cstr(ds, "(error)");
160 percentage = (100.0 * nl_attr_get_u32(a[OVS_SAMPLE_ATTR_PROBABILITY])) /
163 ds_put_format(ds, "(sample=%.1f%%,", percentage);
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, "))");
173 slow_path_reason_to_string(uint32_t data)
175 enum slow_path_reason bit = (enum slow_path_reason) data;
186 case SLOW_CONTROLLER:
194 parse_flags(const char *s, const char *(*bit_to_string)(uint32_t),
205 while (s[n] != ')') {
206 unsigned long long int flags;
210 if (sscanf(&s[n], "%lli%n", &flags, &n0) > 0 && n0 > 0) {
211 n += n0 + (s[n + n0] == ',');
216 for (bit = 1; bit; bit <<= 1) {
217 const char *name = bit_to_string(bit);
225 if (!strncmp(s + n, name, len) &&
226 (s[n + len] == ',' || s[n + len] == ')')) {
228 n += len + (s[n + len] == ',');
244 format_odp_userspace_action(struct ds *ds, const struct nlattr *attr)
246 static const struct nl_policy ovs_userspace_policy[] = {
247 [OVS_USERSPACE_ATTR_PID] = { .type = NL_A_U32 },
248 [OVS_USERSPACE_ATTR_USERDATA] = { .type = NL_A_UNSPEC,
251 struct nlattr *a[ARRAY_SIZE(ovs_userspace_policy)];
252 const struct nlattr *userdata_attr;
254 if (!nl_parse_nested(attr, ovs_userspace_policy, a, ARRAY_SIZE(a))) {
255 ds_put_cstr(ds, "userspace(error)");
259 ds_put_format(ds, "userspace(pid=%"PRIu32,
260 nl_attr_get_u32(a[OVS_USERSPACE_ATTR_PID]));
262 userdata_attr = a[OVS_USERSPACE_ATTR_USERDATA];
265 const uint8_t *userdata = nl_attr_get(userdata_attr);
266 size_t userdata_len = nl_attr_get_size(userdata_attr);
267 bool userdata_unspec = true;
268 union user_action_cookie cookie;
270 if (userdata_len >= sizeof cookie.type
271 && userdata_len <= sizeof cookie) {
273 memset(&cookie, 0, sizeof cookie);
274 memcpy(&cookie, userdata, userdata_len);
276 userdata_unspec = false;
278 if (userdata_len == sizeof cookie.sflow
279 && cookie.type == USER_ACTION_COOKIE_SFLOW) {
280 ds_put_format(ds, ",sFlow("
281 "vid=%"PRIu16",pcp=%"PRIu8",output=%"PRIu32")",
282 vlan_tci_to_vid(cookie.sflow.vlan_tci),
283 vlan_tci_to_pcp(cookie.sflow.vlan_tci),
284 cookie.sflow.output);
285 } else if (userdata_len == sizeof cookie.slow_path
286 && cookie.type == USER_ACTION_COOKIE_SLOW_PATH) {
287 ds_put_cstr(ds, ",slow_path(");
288 format_flags(ds, slow_path_reason_to_string,
289 cookie.slow_path.reason, ',');
290 ds_put_format(ds, ")");
291 } else if (userdata_len == sizeof cookie.flow_sample
292 && cookie.type == USER_ACTION_COOKIE_FLOW_SAMPLE) {
293 ds_put_format(ds, ",flow_sample(probability=%"PRIu16
294 ",collector_set_id=%"PRIu32
295 ",obs_domain_id=%"PRIu32
296 ",obs_point_id=%"PRIu32")",
297 cookie.flow_sample.probability,
298 cookie.flow_sample.collector_set_id,
299 cookie.flow_sample.obs_domain_id,
300 cookie.flow_sample.obs_point_id);
301 } else if (userdata_len == sizeof cookie.ipfix
302 && cookie.type == USER_ACTION_COOKIE_IPFIX) {
303 ds_put_format(ds, ",ipfix");
305 userdata_unspec = true;
309 if (userdata_unspec) {
311 ds_put_format(ds, ",userdata(");
312 for (i = 0; i < userdata_len; i++) {
313 ds_put_format(ds, "%02x", userdata[i]);
315 ds_put_char(ds, ')');
319 ds_put_char(ds, ')');
323 format_vlan_tci(struct ds *ds, ovs_be16 vlan_tci)
325 ds_put_format(ds, "vid=%"PRIu16",pcp=%d",
326 vlan_tci_to_vid(vlan_tci),
327 vlan_tci_to_pcp(vlan_tci));
328 if (!(vlan_tci & htons(VLAN_CFI))) {
329 ds_put_cstr(ds, ",cfi=0");
334 format_mpls_lse(struct ds *ds, ovs_be32 mpls_lse)
336 ds_put_format(ds, "label=%"PRIu32",tc=%d,ttl=%d,bos=%d",
337 mpls_lse_to_label(mpls_lse),
338 mpls_lse_to_tc(mpls_lse),
339 mpls_lse_to_ttl(mpls_lse),
340 mpls_lse_to_bos(mpls_lse));
344 format_odp_action(struct ds *ds, const struct nlattr *a)
347 enum ovs_action_attr type = nl_attr_type(a);
348 const struct ovs_action_push_vlan *vlan;
350 expected_len = odp_action_len(nl_attr_type(a));
351 if (expected_len != -2 && nl_attr_get_size(a) != expected_len) {
352 ds_put_format(ds, "bad length %zu, expected %d for: ",
353 nl_attr_get_size(a), expected_len);
354 format_generic_odp_action(ds, a);
359 case OVS_ACTION_ATTR_OUTPUT:
360 ds_put_format(ds, "%"PRIu16, nl_attr_get_u32(a));
362 case OVS_ACTION_ATTR_USERSPACE:
363 format_odp_userspace_action(ds, a);
365 case OVS_ACTION_ATTR_SET:
366 ds_put_cstr(ds, "set(");
367 format_odp_key_attr(nl_attr_get(a), ds);
368 ds_put_cstr(ds, ")");
370 case OVS_ACTION_ATTR_PUSH_VLAN:
371 vlan = nl_attr_get(a);
372 ds_put_cstr(ds, "push_vlan(");
373 if (vlan->vlan_tpid != htons(ETH_TYPE_VLAN)) {
374 ds_put_format(ds, "tpid=0x%04"PRIx16",", ntohs(vlan->vlan_tpid));
376 format_vlan_tci(ds, vlan->vlan_tci);
377 ds_put_char(ds, ')');
379 case OVS_ACTION_ATTR_POP_VLAN:
380 ds_put_cstr(ds, "pop_vlan");
382 case OVS_ACTION_ATTR_PUSH_MPLS: {
383 const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
384 ds_put_cstr(ds, "push_mpls(");
385 format_mpls_lse(ds, mpls->mpls_lse);
386 ds_put_format(ds, ",eth_type=0x%"PRIx16")", ntohs(mpls->mpls_ethertype));
389 case OVS_ACTION_ATTR_POP_MPLS: {
390 ovs_be16 ethertype = nl_attr_get_be16(a);
391 ds_put_format(ds, "pop_mpls(eth_type=0x%"PRIx16")", ntohs(ethertype));
394 case OVS_ACTION_ATTR_SAMPLE:
395 format_odp_sample_action(ds, a);
397 case OVS_ACTION_ATTR_UNSPEC:
398 case __OVS_ACTION_ATTR_MAX:
400 format_generic_odp_action(ds, a);
406 format_odp_actions(struct ds *ds, const struct nlattr *actions,
410 const struct nlattr *a;
413 NL_ATTR_FOR_EACH (a, left, actions, actions_len) {
415 ds_put_char(ds, ',');
417 format_odp_action(ds, a);
422 if (left == actions_len) {
423 ds_put_cstr(ds, "<empty>");
425 ds_put_format(ds, ",***%u leftover bytes*** (", left);
426 for (i = 0; i < left; i++) {
427 ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
429 ds_put_char(ds, ')');
432 ds_put_cstr(ds, "drop");
437 parse_odp_action(const char *s, const struct simap *port_names,
438 struct ofpbuf *actions)
440 /* Many of the sscanf calls in this function use oversized destination
441 * fields because some sscanf() implementations truncate the range of %i
442 * directives, so that e.g. "%"SCNi16 interprets input of "0xfedc" as a
443 * value of 0x7fff. The other alternatives are to allow only a single
444 * radix (e.g. decimal or hexadecimal) or to write more sophisticated
447 * The tun_id parser has to use an alternative approach because there is no
448 * type larger than 64 bits. */
451 unsigned long long int port;
454 if (sscanf(s, "%lli%n", &port, &n) > 0 && n > 0) {
455 nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, port);
461 int len = strcspn(s, delimiters);
462 struct simap_node *node;
464 node = simap_find_len(port_names, s, len);
466 nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, node->data);
472 unsigned long long int pid;
473 unsigned long long int output;
474 unsigned long long int probability;
475 unsigned long long int collector_set_id;
476 unsigned long long int obs_domain_id;
477 unsigned long long int obs_point_id;
481 if (sscanf(s, "userspace(pid=%lli)%n", &pid, &n) > 0 && n > 0) {
482 odp_put_userspace_action(pid, NULL, 0, actions);
484 } else if (sscanf(s, "userspace(pid=%lli,sFlow(vid=%i,"
485 "pcp=%i,output=%lli))%n",
486 &pid, &vid, &pcp, &output, &n) > 0 && n > 0) {
487 union user_action_cookie cookie;
490 tci = vid | (pcp << VLAN_PCP_SHIFT);
495 cookie.type = USER_ACTION_COOKIE_SFLOW;
496 cookie.sflow.vlan_tci = htons(tci);
497 cookie.sflow.output = output;
498 odp_put_userspace_action(pid, &cookie, sizeof cookie.sflow,
501 } else if (sscanf(s, "userspace(pid=%lli,slow_path%n", &pid, &n) > 0
503 union user_action_cookie cookie;
506 cookie.type = USER_ACTION_COOKIE_SLOW_PATH;
507 cookie.slow_path.unused = 0;
508 cookie.slow_path.reason = 0;
510 res = parse_flags(&s[n], slow_path_reason_to_string,
511 &cookie.slow_path.reason);
521 odp_put_userspace_action(pid, &cookie, sizeof cookie.slow_path,
524 } else if (sscanf(s, "userspace(pid=%lli,flow_sample(probability=%lli,"
525 "collector_set_id=%lli,obs_domain_id=%lli,"
526 "obs_point_id=%lli))%n",
527 &pid, &probability, &collector_set_id,
528 &obs_domain_id, &obs_point_id, &n) > 0 && n > 0) {
529 union user_action_cookie cookie;
531 cookie.type = USER_ACTION_COOKIE_FLOW_SAMPLE;
532 cookie.flow_sample.probability = probability;
533 cookie.flow_sample.collector_set_id = collector_set_id;
534 cookie.flow_sample.obs_domain_id = obs_domain_id;
535 cookie.flow_sample.obs_point_id = obs_point_id;
536 odp_put_userspace_action(pid, &cookie, sizeof cookie.flow_sample,
539 } else if (sscanf(s, "userspace(pid=%lli,ipfix)%n", &pid, &n) > 0
541 union user_action_cookie cookie;
543 cookie.type = USER_ACTION_COOKIE_IPFIX;
544 odp_put_userspace_action(pid, &cookie, sizeof cookie.ipfix,
547 } else if (sscanf(s, "userspace(pid=%lli,userdata(%n", &pid, &n) > 0
552 ofpbuf_init(&buf, 16);
553 end = ofpbuf_put_hex(&buf, &s[n], NULL);
554 if (end[0] == ')' && end[1] == ')') {
555 odp_put_userspace_action(pid, buf.data, buf.size, actions);
557 return (end + 2) - s;
562 if (!strncmp(s, "set(", 4)) {
566 start_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SET);
567 retval = parse_odp_key_attr(s + 4, port_names, actions);
571 if (s[retval + 4] != ')') {
574 nl_msg_end_nested(actions, start_ofs);
579 struct ovs_action_push_vlan push;
580 int tpid = ETH_TYPE_VLAN;
585 if ((sscanf(s, "push_vlan(vid=%i,pcp=%i)%n", &vid, &pcp, &n) > 0
587 || (sscanf(s, "push_vlan(vid=%i,pcp=%i,cfi=%i)%n",
588 &vid, &pcp, &cfi, &n) > 0 && n > 0)
589 || (sscanf(s, "push_vlan(tpid=%i,vid=%i,pcp=%i)%n",
590 &tpid, &vid, &pcp, &n) > 0 && n > 0)
591 || (sscanf(s, "push_vlan(tpid=%i,vid=%i,pcp=%i,cfi=%i)%n",
592 &tpid, &vid, &pcp, &cfi, &n) > 0 && n > 0)) {
593 push.vlan_tpid = htons(tpid);
594 push.vlan_tci = htons((vid << VLAN_VID_SHIFT)
595 | (pcp << VLAN_PCP_SHIFT)
596 | (cfi ? VLAN_CFI : 0));
597 nl_msg_put_unspec(actions, OVS_ACTION_ATTR_PUSH_VLAN,
604 if (!strncmp(s, "pop_vlan", 8)) {
605 nl_msg_put_flag(actions, OVS_ACTION_ATTR_POP_VLAN);
613 if (sscanf(s, "sample(sample=%lf%%,actions(%n", &percentage, &n) > 0
614 && percentage >= 0. && percentage <= 100.0
616 size_t sample_ofs, actions_ofs;
619 probability = floor(UINT32_MAX * (percentage / 100.0) + .5);
620 sample_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SAMPLE);
621 nl_msg_put_u32(actions, OVS_SAMPLE_ATTR_PROBABILITY,
622 (probability <= 0 ? 0
623 : probability >= UINT32_MAX ? UINT32_MAX
626 actions_ofs = nl_msg_start_nested(actions,
627 OVS_SAMPLE_ATTR_ACTIONS);
631 n += strspn(s + n, delimiters);
636 retval = parse_odp_action(s + n, port_names, actions);
642 nl_msg_end_nested(actions, actions_ofs);
643 nl_msg_end_nested(actions, sample_ofs);
645 return s[n + 1] == ')' ? n + 2 : -EINVAL;
652 /* Parses the string representation of datapath actions, in the format output
653 * by format_odp_action(). Returns 0 if successful, otherwise a positive errno
654 * value. On success, the ODP actions are appended to 'actions' as a series of
655 * Netlink attributes. On failure, no data is appended to 'actions'. Either
656 * way, 'actions''s data might be reallocated. */
658 odp_actions_from_string(const char *s, const struct simap *port_names,
659 struct ofpbuf *actions)
663 if (!strcasecmp(s, "drop")) {
667 old_size = actions->size;
671 s += strspn(s, delimiters);
676 retval = parse_odp_action(s, port_names, actions);
677 if (retval < 0 || !strchr(delimiters, s[retval])) {
678 actions->size = old_size;
687 /* Returns the correct length of the payload for a flow key attribute of the
688 * specified 'type', -1 if 'type' is unknown, or -2 if the attribute's payload
689 * is variable length. */
691 odp_flow_key_attr_len(uint16_t type)
693 if (type > OVS_KEY_ATTR_MAX) {
697 switch ((enum ovs_key_attr) type) {
698 case OVS_KEY_ATTR_ENCAP: return -2;
699 case OVS_KEY_ATTR_PRIORITY: return 4;
700 case OVS_KEY_ATTR_SKB_MARK: return 4;
701 case OVS_KEY_ATTR_TUNNEL: return -2;
702 case OVS_KEY_ATTR_IN_PORT: return 4;
703 case OVS_KEY_ATTR_ETHERNET: return sizeof(struct ovs_key_ethernet);
704 case OVS_KEY_ATTR_VLAN: return sizeof(ovs_be16);
705 case OVS_KEY_ATTR_ETHERTYPE: return 2;
706 case OVS_KEY_ATTR_MPLS: return sizeof(struct ovs_key_mpls);
707 case OVS_KEY_ATTR_IPV4: return sizeof(struct ovs_key_ipv4);
708 case OVS_KEY_ATTR_IPV6: return sizeof(struct ovs_key_ipv6);
709 case OVS_KEY_ATTR_TCP: return sizeof(struct ovs_key_tcp);
710 case OVS_KEY_ATTR_UDP: return sizeof(struct ovs_key_udp);
711 case OVS_KEY_ATTR_ICMP: return sizeof(struct ovs_key_icmp);
712 case OVS_KEY_ATTR_ICMPV6: return sizeof(struct ovs_key_icmpv6);
713 case OVS_KEY_ATTR_ARP: return sizeof(struct ovs_key_arp);
714 case OVS_KEY_ATTR_ND: return sizeof(struct ovs_key_nd);
716 case OVS_KEY_ATTR_UNSPEC:
717 case __OVS_KEY_ATTR_MAX:
725 format_generic_odp_key(const struct nlattr *a, struct ds *ds)
727 size_t len = nl_attr_get_size(a);
729 const uint8_t *unspec;
732 unspec = nl_attr_get(a);
733 for (i = 0; i < len; i++) {
734 ds_put_char(ds, i ? ' ': '(');
735 ds_put_format(ds, "%02x", unspec[i]);
737 ds_put_char(ds, ')');
742 ovs_frag_type_to_string(enum ovs_frag_type type)
745 case OVS_FRAG_TYPE_NONE:
747 case OVS_FRAG_TYPE_FIRST:
749 case OVS_FRAG_TYPE_LATER:
751 case __OVS_FRAG_TYPE_MAX:
758 tunnel_key_attr_len(int type)
761 case OVS_TUNNEL_KEY_ATTR_ID: return 8;
762 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: return 4;
763 case OVS_TUNNEL_KEY_ATTR_IPV4_DST: return 4;
764 case OVS_TUNNEL_KEY_ATTR_TOS: return 1;
765 case OVS_TUNNEL_KEY_ATTR_TTL: return 1;
766 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: return 0;
767 case OVS_TUNNEL_KEY_ATTR_CSUM: return 0;
768 case __OVS_TUNNEL_KEY_ATTR_MAX:
774 static enum odp_key_fitness
775 tun_key_from_attr(const struct nlattr *attr, struct flow_tnl *tun)
778 const struct nlattr *a;
780 bool unknown = false;
782 NL_NESTED_FOR_EACH(a, left, attr) {
783 uint16_t type = nl_attr_type(a);
784 size_t len = nl_attr_get_size(a);
785 int expected_len = tunnel_key_attr_len(type);
787 if (len != expected_len && expected_len >= 0) {
788 return ODP_FIT_ERROR;
792 case OVS_TUNNEL_KEY_ATTR_ID:
793 tun->tun_id = nl_attr_get_be64(a);
794 tun->flags |= FLOW_TNL_F_KEY;
796 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
797 tun->ip_src = nl_attr_get_be32(a);
799 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
800 tun->ip_dst = nl_attr_get_be32(a);
802 case OVS_TUNNEL_KEY_ATTR_TOS:
803 tun->ip_tos = nl_attr_get_u8(a);
805 case OVS_TUNNEL_KEY_ATTR_TTL:
806 tun->ip_ttl = nl_attr_get_u8(a);
809 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
810 tun->flags |= FLOW_TNL_F_DONT_FRAGMENT;
812 case OVS_TUNNEL_KEY_ATTR_CSUM:
813 tun->flags |= FLOW_TNL_F_CSUM;
816 /* Allow this to show up as unexpected, if there are unknown
817 * tunnel attribute, eventually resulting in ODP_FIT_TOO_MUCH. */
824 return ODP_FIT_ERROR;
827 return ODP_FIT_TOO_MUCH;
829 return ODP_FIT_PERFECT;
833 tun_key_to_attr(struct ofpbuf *a, const struct flow_tnl *tun_key)
837 tun_key_ofs = nl_msg_start_nested(a, OVS_KEY_ATTR_TUNNEL);
839 if (tun_key->flags & FLOW_TNL_F_KEY) {
840 nl_msg_put_be64(a, OVS_TUNNEL_KEY_ATTR_ID, tun_key->tun_id);
842 if (tun_key->ip_src) {
843 nl_msg_put_be32(a, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, tun_key->ip_src);
845 if (tun_key->ip_dst) {
846 nl_msg_put_be32(a, OVS_TUNNEL_KEY_ATTR_IPV4_DST, tun_key->ip_dst);
848 if (tun_key->ip_tos) {
849 nl_msg_put_u8(a, OVS_TUNNEL_KEY_ATTR_TOS, tun_key->ip_tos);
851 nl_msg_put_u8(a, OVS_TUNNEL_KEY_ATTR_TTL, tun_key->ip_ttl);
852 if (tun_key->flags & FLOW_TNL_F_DONT_FRAGMENT) {
853 nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT);
855 if (tun_key->flags & FLOW_TNL_F_CSUM) {
856 nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_CSUM);
859 nl_msg_end_nested(a, tun_key_ofs);
863 format_odp_key_attr(const struct nlattr *a, struct ds *ds)
865 const struct ovs_key_ethernet *eth_key;
866 const struct ovs_key_ipv4 *ipv4_key;
867 const struct ovs_key_ipv6 *ipv6_key;
868 const struct ovs_key_tcp *tcp_key;
869 const struct ovs_key_udp *udp_key;
870 const struct ovs_key_icmp *icmp_key;
871 const struct ovs_key_icmpv6 *icmpv6_key;
872 const struct ovs_key_arp *arp_key;
873 const struct ovs_key_nd *nd_key;
874 struct flow_tnl tun_key;
875 enum ovs_key_attr attr = nl_attr_type(a);
878 ds_put_cstr(ds, ovs_key_attr_to_string(attr));
879 expected_len = odp_flow_key_attr_len(nl_attr_type(a));
880 if (expected_len != -2 && nl_attr_get_size(a) != expected_len) {
881 ds_put_format(ds, "(bad length %zu, expected %d)",
883 odp_flow_key_attr_len(nl_attr_type(a)));
884 format_generic_odp_key(a, ds);
889 case OVS_KEY_ATTR_ENCAP:
890 ds_put_cstr(ds, "(");
891 if (nl_attr_get_size(a)) {
892 odp_flow_key_format(nl_attr_get(a), nl_attr_get_size(a), ds);
894 ds_put_char(ds, ')');
897 case OVS_KEY_ATTR_PRIORITY:
898 ds_put_format(ds, "(%#"PRIx32")", nl_attr_get_u32(a));
901 case OVS_KEY_ATTR_SKB_MARK:
902 ds_put_format(ds, "(%#"PRIx32")", nl_attr_get_u32(a));
905 case OVS_KEY_ATTR_TUNNEL:
906 memset(&tun_key, 0, sizeof tun_key);
907 if (tun_key_from_attr(a, &tun_key) == ODP_FIT_ERROR) {
908 ds_put_format(ds, "(error)");
910 ds_put_format(ds, "(tun_id=0x%"PRIx64",src="IP_FMT",dst="IP_FMT","
911 "tos=0x%"PRIx8",ttl=%"PRIu8",flags(",
912 ntohll(tun_key.tun_id),
913 IP_ARGS(tun_key.ip_src),
914 IP_ARGS(tun_key.ip_dst),
915 tun_key.ip_tos, tun_key.ip_ttl);
917 format_flags(ds, flow_tun_flag_to_string,
918 (uint32_t) tun_key.flags, ',');
919 ds_put_format(ds, "))");
923 case OVS_KEY_ATTR_IN_PORT:
924 ds_put_format(ds, "(%"PRIu32")", nl_attr_get_u32(a));
927 case OVS_KEY_ATTR_ETHERNET:
928 eth_key = nl_attr_get(a);
929 ds_put_format(ds, "(src="ETH_ADDR_FMT",dst="ETH_ADDR_FMT")",
930 ETH_ADDR_ARGS(eth_key->eth_src),
931 ETH_ADDR_ARGS(eth_key->eth_dst));
934 case OVS_KEY_ATTR_VLAN:
935 ds_put_char(ds, '(');
936 format_vlan_tci(ds, nl_attr_get_be16(a));
937 ds_put_char(ds, ')');
940 case OVS_KEY_ATTR_MPLS: {
941 const struct ovs_key_mpls *mpls_key = nl_attr_get(a);
942 ds_put_char(ds, '(');
943 format_mpls_lse(ds, mpls_key->mpls_lse);
944 ds_put_char(ds, ')');
948 case OVS_KEY_ATTR_ETHERTYPE:
949 ds_put_format(ds, "(0x%04"PRIx16")",
950 ntohs(nl_attr_get_be16(a)));
953 case OVS_KEY_ATTR_IPV4:
954 ipv4_key = nl_attr_get(a);
955 ds_put_format(ds, "(src="IP_FMT",dst="IP_FMT",proto=%"PRIu8
956 ",tos=%#"PRIx8",ttl=%"PRIu8",frag=%s)",
957 IP_ARGS(ipv4_key->ipv4_src),
958 IP_ARGS(ipv4_key->ipv4_dst),
959 ipv4_key->ipv4_proto, ipv4_key->ipv4_tos,
961 ovs_frag_type_to_string(ipv4_key->ipv4_frag));
964 case OVS_KEY_ATTR_IPV6: {
965 char src_str[INET6_ADDRSTRLEN];
966 char dst_str[INET6_ADDRSTRLEN];
968 ipv6_key = nl_attr_get(a);
969 inet_ntop(AF_INET6, ipv6_key->ipv6_src, src_str, sizeof src_str);
970 inet_ntop(AF_INET6, ipv6_key->ipv6_dst, dst_str, sizeof dst_str);
972 ds_put_format(ds, "(src=%s,dst=%s,label=%#"PRIx32",proto=%"PRIu8
973 ",tclass=%#"PRIx8",hlimit=%"PRIu8",frag=%s)",
974 src_str, dst_str, ntohl(ipv6_key->ipv6_label),
975 ipv6_key->ipv6_proto, ipv6_key->ipv6_tclass,
976 ipv6_key->ipv6_hlimit,
977 ovs_frag_type_to_string(ipv6_key->ipv6_frag));
981 case OVS_KEY_ATTR_TCP:
982 tcp_key = nl_attr_get(a);
983 ds_put_format(ds, "(src=%"PRIu16",dst=%"PRIu16")",
984 ntohs(tcp_key->tcp_src), ntohs(tcp_key->tcp_dst));
987 case OVS_KEY_ATTR_UDP:
988 udp_key = nl_attr_get(a);
989 ds_put_format(ds, "(src=%"PRIu16",dst=%"PRIu16")",
990 ntohs(udp_key->udp_src), ntohs(udp_key->udp_dst));
993 case OVS_KEY_ATTR_ICMP:
994 icmp_key = nl_attr_get(a);
995 ds_put_format(ds, "(type=%"PRIu8",code=%"PRIu8")",
996 icmp_key->icmp_type, icmp_key->icmp_code);
999 case OVS_KEY_ATTR_ICMPV6:
1000 icmpv6_key = nl_attr_get(a);
1001 ds_put_format(ds, "(type=%"PRIu8",code=%"PRIu8")",
1002 icmpv6_key->icmpv6_type, icmpv6_key->icmpv6_code);
1005 case OVS_KEY_ATTR_ARP:
1006 arp_key = nl_attr_get(a);
1007 ds_put_format(ds, "(sip="IP_FMT",tip="IP_FMT",op=%"PRIu16","
1008 "sha="ETH_ADDR_FMT",tha="ETH_ADDR_FMT")",
1009 IP_ARGS(arp_key->arp_sip), IP_ARGS(arp_key->arp_tip),
1010 ntohs(arp_key->arp_op), ETH_ADDR_ARGS(arp_key->arp_sha),
1011 ETH_ADDR_ARGS(arp_key->arp_tha));
1014 case OVS_KEY_ATTR_ND: {
1015 char target[INET6_ADDRSTRLEN];
1017 nd_key = nl_attr_get(a);
1018 inet_ntop(AF_INET6, nd_key->nd_target, target, sizeof target);
1020 ds_put_format(ds, "(target=%s", target);
1021 if (!eth_addr_is_zero(nd_key->nd_sll)) {
1022 ds_put_format(ds, ",sll="ETH_ADDR_FMT,
1023 ETH_ADDR_ARGS(nd_key->nd_sll));
1025 if (!eth_addr_is_zero(nd_key->nd_tll)) {
1026 ds_put_format(ds, ",tll="ETH_ADDR_FMT,
1027 ETH_ADDR_ARGS(nd_key->nd_tll));
1029 ds_put_char(ds, ')');
1033 case OVS_KEY_ATTR_UNSPEC:
1034 case __OVS_KEY_ATTR_MAX:
1036 format_generic_odp_key(a, ds);
1041 /* Appends to 'ds' a string representation of the 'key_len' bytes of
1042 * OVS_KEY_ATTR_* attributes in 'key'. */
1044 odp_flow_key_format(const struct nlattr *key, size_t key_len, struct ds *ds)
1047 const struct nlattr *a;
1050 NL_ATTR_FOR_EACH (a, left, key, key_len) {
1052 ds_put_char(ds, ',');
1054 format_odp_key_attr(a, ds);
1059 if (left == key_len) {
1060 ds_put_cstr(ds, "<empty>");
1062 ds_put_format(ds, ",***%u leftover bytes*** (", left);
1063 for (i = 0; i < left; i++) {
1064 ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
1066 ds_put_char(ds, ')');
1069 ds_put_cstr(ds, "<empty>");
1074 put_nd_key(int n, const char *nd_target_s,
1075 const uint8_t *nd_sll, const uint8_t *nd_tll, struct ofpbuf *key)
1077 struct ovs_key_nd nd_key;
1079 memset(&nd_key, 0, sizeof nd_key);
1080 if (inet_pton(AF_INET6, nd_target_s, nd_key.nd_target) != 1) {
1084 memcpy(nd_key.nd_sll, nd_sll, ETH_ADDR_LEN);
1087 memcpy(nd_key.nd_tll, nd_tll, ETH_ADDR_LEN);
1089 nl_msg_put_unspec(key, OVS_KEY_ATTR_ND, &nd_key, sizeof nd_key);
1094 ovs_frag_type_from_string(const char *s, enum ovs_frag_type *type)
1096 if (!strcasecmp(s, "no")) {
1097 *type = OVS_FRAG_TYPE_NONE;
1098 } else if (!strcasecmp(s, "first")) {
1099 *type = OVS_FRAG_TYPE_FIRST;
1100 } else if (!strcasecmp(s, "later")) {
1101 *type = OVS_FRAG_TYPE_LATER;
1109 mpls_lse_from_components(int mpls_label, int mpls_tc, int mpls_ttl, int mpls_bos)
1111 return (htonl((mpls_label << MPLS_LABEL_SHIFT) |
1112 (mpls_tc << MPLS_TC_SHIFT) |
1113 (mpls_ttl << MPLS_TTL_SHIFT) |
1114 (mpls_bos << MPLS_BOS_SHIFT)));
1118 parse_odp_key_attr(const char *s, const struct simap *port_names,
1121 /* Many of the sscanf calls in this function use oversized destination
1122 * fields because some sscanf() implementations truncate the range of %i
1123 * directives, so that e.g. "%"SCNi16 interprets input of "0xfedc" as a
1124 * value of 0x7fff. The other alternatives are to allow only a single
1125 * radix (e.g. decimal or hexadecimal) or to write more sophisticated
1128 * The tun_id parser has to use an alternative approach because there is no
1129 * type larger than 64 bits. */
1132 unsigned long long int priority;
1135 if (sscanf(s, "skb_priority(%llx)%n", &priority, &n) > 0 && n > 0) {
1136 nl_msg_put_u32(key, OVS_KEY_ATTR_PRIORITY, priority);
1142 unsigned long long int mark;
1145 if (sscanf(s, "skb_mark(%llx)%n", &mark, &n) > 0 && n > 0) {
1146 nl_msg_put_u32(key, OVS_KEY_ATTR_SKB_MARK, mark);
1154 struct flow_tnl tun_key;
1157 if (sscanf(s, "tunnel(tun_id=%31[x0123456789abcdefABCDEF],"
1158 "src="IP_SCAN_FMT",dst="IP_SCAN_FMT
1159 ",tos=%i,ttl=%i,flags%n", tun_id_s,
1160 IP_SCAN_ARGS(&tun_key.ip_src),
1161 IP_SCAN_ARGS(&tun_key.ip_dst), &tos, &ttl,
1166 tun_key.tun_id = htonll(strtoull(tun_id_s, NULL, 0));
1167 tun_key.ip_tos = tos;
1168 tun_key.ip_ttl = ttl;
1169 res = parse_flags(&s[n], flow_tun_flag_to_string, &flags);
1170 tun_key.flags = (uint16_t) flags;
1180 tun_key_to_attr(key, &tun_key);
1186 unsigned long long int in_port;
1189 if (sscanf(s, "in_port(%lli)%n", &in_port, &n) > 0 && n > 0) {
1190 nl_msg_put_u32(key, OVS_KEY_ATTR_IN_PORT, in_port);
1195 if (port_names && !strncmp(s, "in_port(", 8)) {
1197 const struct simap_node *node;
1201 name_len = strcspn(s, ")");
1202 node = simap_find_len(port_names, name, name_len);
1204 nl_msg_put_u32(key, OVS_KEY_ATTR_IN_PORT, node->data);
1205 return 8 + name_len + 1;
1210 struct ovs_key_ethernet eth_key;
1214 "eth(src="ETH_ADDR_SCAN_FMT",dst="ETH_ADDR_SCAN_FMT")%n",
1215 ETH_ADDR_SCAN_ARGS(eth_key.eth_src),
1216 ETH_ADDR_SCAN_ARGS(eth_key.eth_dst), &n) > 0 && n > 0) {
1217 nl_msg_put_unspec(key, OVS_KEY_ATTR_ETHERNET,
1218 ð_key, sizeof eth_key);
1229 if ((sscanf(s, "vlan(vid=%"SCNi16",pcp=%i)%n", &vid, &pcp, &n) > 0
1231 nl_msg_put_be16(key, OVS_KEY_ATTR_VLAN,
1232 htons((vid << VLAN_VID_SHIFT) |
1233 (pcp << VLAN_PCP_SHIFT) |
1236 } else if ((sscanf(s, "vlan(vid=%"SCNi16",pcp=%i,cfi=%i)%n",
1237 &vid, &pcp, &cfi, &n) > 0
1239 nl_msg_put_be16(key, OVS_KEY_ATTR_VLAN,
1240 htons((vid << VLAN_VID_SHIFT) |
1241 (pcp << VLAN_PCP_SHIFT) |
1242 (cfi ? VLAN_CFI : 0)));
1251 if (sscanf(s, "eth_type(%i)%n", ð_type, &n) > 0 && n > 0) {
1252 nl_msg_put_be16(key, OVS_KEY_ATTR_ETHERTYPE, htons(eth_type));
1258 int label, tc, ttl, bos;
1261 if (sscanf(s, "mpls(label=%"SCNi32",tc=%i,ttl=%i,bos=%i)%n",
1262 &label, &tc, &ttl, &bos, &n) > 0 &&
1264 struct ovs_key_mpls *mpls;
1266 mpls = nl_msg_put_unspec_uninit(key, OVS_KEY_ATTR_MPLS,
1268 mpls->mpls_lse = mpls_lse_from_components(label, tc, ttl, bos);
1280 enum ovs_frag_type ipv4_frag;
1283 if (sscanf(s, "ipv4(src="IP_SCAN_FMT",dst="IP_SCAN_FMT","
1284 "proto=%i,tos=%i,ttl=%i,frag=%7[a-z])%n",
1285 IP_SCAN_ARGS(&ipv4_src), IP_SCAN_ARGS(&ipv4_dst),
1286 &ipv4_proto, &ipv4_tos, &ipv4_ttl, frag, &n) > 0
1288 && ovs_frag_type_from_string(frag, &ipv4_frag)) {
1289 struct ovs_key_ipv4 ipv4_key;
1291 ipv4_key.ipv4_src = ipv4_src;
1292 ipv4_key.ipv4_dst = ipv4_dst;
1293 ipv4_key.ipv4_proto = ipv4_proto;
1294 ipv4_key.ipv4_tos = ipv4_tos;
1295 ipv4_key.ipv4_ttl = ipv4_ttl;
1296 ipv4_key.ipv4_frag = ipv4_frag;
1297 nl_msg_put_unspec(key, OVS_KEY_ATTR_IPV4,
1298 &ipv4_key, sizeof ipv4_key);
1304 char ipv6_src_s[IPV6_SCAN_LEN + 1];
1305 char ipv6_dst_s[IPV6_SCAN_LEN + 1];
1311 enum ovs_frag_type ipv6_frag;
1314 if (sscanf(s, "ipv6(src="IPV6_SCAN_FMT",dst="IPV6_SCAN_FMT","
1315 "label=%i,proto=%i,tclass=%i,hlimit=%i,frag=%7[a-z])%n",
1316 ipv6_src_s, ipv6_dst_s, &ipv6_label,
1317 &ipv6_proto, &ipv6_tclass, &ipv6_hlimit, frag, &n) > 0
1319 && ovs_frag_type_from_string(frag, &ipv6_frag)) {
1320 struct ovs_key_ipv6 ipv6_key;
1322 if (inet_pton(AF_INET6, ipv6_src_s, &ipv6_key.ipv6_src) != 1 ||
1323 inet_pton(AF_INET6, ipv6_dst_s, &ipv6_key.ipv6_dst) != 1) {
1326 ipv6_key.ipv6_label = htonl(ipv6_label);
1327 ipv6_key.ipv6_proto = ipv6_proto;
1328 ipv6_key.ipv6_tclass = ipv6_tclass;
1329 ipv6_key.ipv6_hlimit = ipv6_hlimit;
1330 ipv6_key.ipv6_frag = ipv6_frag;
1331 nl_msg_put_unspec(key, OVS_KEY_ATTR_IPV6,
1332 &ipv6_key, sizeof ipv6_key);
1342 if (sscanf(s, "tcp(src=%i,dst=%i)%n",&tcp_src, &tcp_dst, &n) > 0
1344 struct ovs_key_tcp tcp_key;
1346 tcp_key.tcp_src = htons(tcp_src);
1347 tcp_key.tcp_dst = htons(tcp_dst);
1348 nl_msg_put_unspec(key, OVS_KEY_ATTR_TCP, &tcp_key, sizeof tcp_key);
1358 if (sscanf(s, "udp(src=%i,dst=%i)%n", &udp_src, &udp_dst, &n) > 0
1360 struct ovs_key_udp udp_key;
1362 udp_key.udp_src = htons(udp_src);
1363 udp_key.udp_dst = htons(udp_dst);
1364 nl_msg_put_unspec(key, OVS_KEY_ATTR_UDP, &udp_key, sizeof udp_key);
1374 if (sscanf(s, "icmp(type=%i,code=%i)%n",
1375 &icmp_type, &icmp_code, &n) > 0
1377 struct ovs_key_icmp icmp_key;
1379 icmp_key.icmp_type = icmp_type;
1380 icmp_key.icmp_code = icmp_code;
1381 nl_msg_put_unspec(key, OVS_KEY_ATTR_ICMP,
1382 &icmp_key, sizeof icmp_key);
1388 struct ovs_key_icmpv6 icmpv6_key;
1391 if (sscanf(s, "icmpv6(type=%"SCNi8",code=%"SCNi8")%n",
1392 &icmpv6_key.icmpv6_type, &icmpv6_key.icmpv6_code,&n) > 0
1394 nl_msg_put_unspec(key, OVS_KEY_ATTR_ICMPV6,
1395 &icmpv6_key, sizeof icmpv6_key);
1404 uint8_t arp_sha[ETH_ADDR_LEN];
1405 uint8_t arp_tha[ETH_ADDR_LEN];
1408 if (sscanf(s, "arp(sip="IP_SCAN_FMT",tip="IP_SCAN_FMT","
1409 "op=%i,sha="ETH_ADDR_SCAN_FMT",tha="ETH_ADDR_SCAN_FMT")%n",
1410 IP_SCAN_ARGS(&arp_sip),
1411 IP_SCAN_ARGS(&arp_tip),
1413 ETH_ADDR_SCAN_ARGS(arp_sha),
1414 ETH_ADDR_SCAN_ARGS(arp_tha), &n) > 0 && n > 0) {
1415 struct ovs_key_arp arp_key;
1417 memset(&arp_key, 0, sizeof arp_key);
1418 arp_key.arp_sip = arp_sip;
1419 arp_key.arp_tip = arp_tip;
1420 arp_key.arp_op = htons(arp_op);
1421 memcpy(arp_key.arp_sha, arp_sha, ETH_ADDR_LEN);
1422 memcpy(arp_key.arp_tha, arp_tha, ETH_ADDR_LEN);
1423 nl_msg_put_unspec(key, OVS_KEY_ATTR_ARP, &arp_key, sizeof arp_key);
1429 char nd_target_s[IPV6_SCAN_LEN + 1];
1430 uint8_t nd_sll[ETH_ADDR_LEN];
1431 uint8_t nd_tll[ETH_ADDR_LEN];
1434 if (sscanf(s, "nd(target="IPV6_SCAN_FMT")%n",
1435 nd_target_s, &n) > 0 && n > 0) {
1436 return put_nd_key(n, nd_target_s, NULL, NULL, key);
1438 if (sscanf(s, "nd(target="IPV6_SCAN_FMT",sll="ETH_ADDR_SCAN_FMT")%n",
1439 nd_target_s, ETH_ADDR_SCAN_ARGS(nd_sll), &n) > 0
1441 return put_nd_key(n, nd_target_s, nd_sll, NULL, key);
1443 if (sscanf(s, "nd(target="IPV6_SCAN_FMT",tll="ETH_ADDR_SCAN_FMT")%n",
1444 nd_target_s, ETH_ADDR_SCAN_ARGS(nd_tll), &n) > 0
1446 return put_nd_key(n, nd_target_s, NULL, nd_tll, key);
1448 if (sscanf(s, "nd(target="IPV6_SCAN_FMT",sll="ETH_ADDR_SCAN_FMT","
1449 "tll="ETH_ADDR_SCAN_FMT")%n",
1450 nd_target_s, ETH_ADDR_SCAN_ARGS(nd_sll),
1451 ETH_ADDR_SCAN_ARGS(nd_tll), &n) > 0
1453 return put_nd_key(n, nd_target_s, nd_sll, nd_tll, key);
1457 if (!strncmp(s, "encap(", 6)) {
1458 const char *start = s;
1461 encap = nl_msg_start_nested(key, OVS_KEY_ATTR_ENCAP);
1467 s += strspn(s, ", \t\r\n");
1470 } else if (*s == ')') {
1474 retval = parse_odp_key_attr(s, port_names, key);
1482 nl_msg_end_nested(key, encap);
1490 /* Parses the string representation of a datapath flow key, in the
1491 * format output by odp_flow_key_format(). Returns 0 if successful,
1492 * otherwise a positive errno value. On success, the flow key is
1493 * appended to 'key' as a series of Netlink attributes. On failure, no
1494 * data is appended to 'key'. Either way, 'key''s data might be
1497 * If 'port_names' is nonnull, it points to an simap that maps from a port name
1498 * to a port number. (Port names may be used instead of port numbers in
1501 * On success, the attributes appended to 'key' are individually syntactically
1502 * valid, but they may not be valid as a sequence. 'key' might, for example,
1503 * have duplicated keys. odp_flow_key_to_flow() will detect those errors. */
1505 odp_flow_key_from_string(const char *s, const struct simap *port_names,
1508 const size_t old_size = key->size;
1512 s += strspn(s, delimiters);
1517 retval = parse_odp_key_attr(s, port_names, key);
1519 key->size = old_size;
1529 ovs_to_odp_frag(uint8_t nw_frag)
1531 return (nw_frag == 0 ? OVS_FRAG_TYPE_NONE
1532 : nw_frag == FLOW_NW_FRAG_ANY ? OVS_FRAG_TYPE_FIRST
1533 : OVS_FRAG_TYPE_LATER);
1536 /* Appends a representation of 'flow' as OVS_KEY_ATTR_* attributes to 'buf'.
1537 * 'flow->in_port' is ignored (since it is likely to be an OpenFlow port
1538 * number rather than a datapath port number). Instead, if 'odp_in_port'
1539 * is anything other than OVSP_NONE, it is included in 'buf' as the input
1542 * 'buf' must have at least ODPUTIL_FLOW_KEY_BYTES bytes of space, or be
1543 * capable of being expanded to allow for that much space. */
1545 odp_flow_key_from_flow(struct ofpbuf *buf, const struct flow *flow,
1546 uint32_t odp_in_port)
1548 struct ovs_key_ethernet *eth_key;
1551 if (flow->skb_priority) {
1552 nl_msg_put_u32(buf, OVS_KEY_ATTR_PRIORITY, flow->skb_priority);
1555 if (flow->tunnel.ip_dst) {
1556 tun_key_to_attr(buf, &flow->tunnel);
1559 if (flow->skb_mark) {
1560 nl_msg_put_u32(buf, OVS_KEY_ATTR_SKB_MARK, flow->skb_mark);
1563 if (odp_in_port != OVSP_NONE) {
1564 nl_msg_put_u32(buf, OVS_KEY_ATTR_IN_PORT, odp_in_port);
1567 eth_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ETHERNET,
1569 memcpy(eth_key->eth_src, flow->dl_src, ETH_ADDR_LEN);
1570 memcpy(eth_key->eth_dst, flow->dl_dst, ETH_ADDR_LEN);
1572 if (flow->vlan_tci != htons(0) || flow->dl_type == htons(ETH_TYPE_VLAN)) {
1573 nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, htons(ETH_TYPE_VLAN));
1574 nl_msg_put_be16(buf, OVS_KEY_ATTR_VLAN, flow->vlan_tci);
1575 encap = nl_msg_start_nested(buf, OVS_KEY_ATTR_ENCAP);
1576 if (flow->vlan_tci == htons(0)) {
1583 if (ntohs(flow->dl_type) < ETH_TYPE_MIN) {
1587 nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, flow->dl_type);
1589 if (flow->dl_type == htons(ETH_TYPE_IP)) {
1590 struct ovs_key_ipv4 *ipv4_key;
1592 ipv4_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_IPV4,
1594 ipv4_key->ipv4_src = flow->nw_src;
1595 ipv4_key->ipv4_dst = flow->nw_dst;
1596 ipv4_key->ipv4_proto = flow->nw_proto;
1597 ipv4_key->ipv4_tos = flow->nw_tos;
1598 ipv4_key->ipv4_ttl = flow->nw_ttl;
1599 ipv4_key->ipv4_frag = ovs_to_odp_frag(flow->nw_frag);
1600 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1601 struct ovs_key_ipv6 *ipv6_key;
1603 ipv6_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_IPV6,
1605 memcpy(ipv6_key->ipv6_src, &flow->ipv6_src, sizeof ipv6_key->ipv6_src);
1606 memcpy(ipv6_key->ipv6_dst, &flow->ipv6_dst, sizeof ipv6_key->ipv6_dst);
1607 ipv6_key->ipv6_label = flow->ipv6_label;
1608 ipv6_key->ipv6_proto = flow->nw_proto;
1609 ipv6_key->ipv6_tclass = flow->nw_tos;
1610 ipv6_key->ipv6_hlimit = flow->nw_ttl;
1611 ipv6_key->ipv6_frag = ovs_to_odp_frag(flow->nw_frag);
1612 } else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
1613 flow->dl_type == htons(ETH_TYPE_RARP)) {
1614 struct ovs_key_arp *arp_key;
1616 arp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ARP,
1618 memset(arp_key, 0, sizeof *arp_key);
1619 arp_key->arp_sip = flow->nw_src;
1620 arp_key->arp_tip = flow->nw_dst;
1621 arp_key->arp_op = htons(flow->nw_proto);
1622 memcpy(arp_key->arp_sha, flow->arp_sha, ETH_ADDR_LEN);
1623 memcpy(arp_key->arp_tha, flow->arp_tha, ETH_ADDR_LEN);
1626 if (flow->mpls_depth) {
1627 struct ovs_key_mpls *mpls_key;
1629 mpls_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_MPLS,
1631 mpls_key->mpls_lse = flow->mpls_lse;
1634 if (is_ip_any(flow) && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1635 if (flow->nw_proto == IPPROTO_TCP) {
1636 struct ovs_key_tcp *tcp_key;
1638 tcp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_TCP,
1640 tcp_key->tcp_src = flow->tp_src;
1641 tcp_key->tcp_dst = flow->tp_dst;
1642 } else if (flow->nw_proto == IPPROTO_UDP) {
1643 struct ovs_key_udp *udp_key;
1645 udp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_UDP,
1647 udp_key->udp_src = flow->tp_src;
1648 udp_key->udp_dst = flow->tp_dst;
1649 } else if (flow->dl_type == htons(ETH_TYPE_IP)
1650 && flow->nw_proto == IPPROTO_ICMP) {
1651 struct ovs_key_icmp *icmp_key;
1653 icmp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ICMP,
1655 icmp_key->icmp_type = ntohs(flow->tp_src);
1656 icmp_key->icmp_code = ntohs(flow->tp_dst);
1657 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)
1658 && flow->nw_proto == IPPROTO_ICMPV6) {
1659 struct ovs_key_icmpv6 *icmpv6_key;
1661 icmpv6_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ICMPV6,
1662 sizeof *icmpv6_key);
1663 icmpv6_key->icmpv6_type = ntohs(flow->tp_src);
1664 icmpv6_key->icmpv6_code = ntohs(flow->tp_dst);
1666 if (icmpv6_key->icmpv6_type == ND_NEIGHBOR_SOLICIT
1667 || icmpv6_key->icmpv6_type == ND_NEIGHBOR_ADVERT) {
1668 struct ovs_key_nd *nd_key;
1670 nd_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ND,
1672 memcpy(nd_key->nd_target, &flow->nd_target,
1673 sizeof nd_key->nd_target);
1674 memcpy(nd_key->nd_sll, flow->arp_sha, ETH_ADDR_LEN);
1675 memcpy(nd_key->nd_tll, flow->arp_tha, ETH_ADDR_LEN);
1682 nl_msg_end_nested(buf, encap);
1687 odp_flow_key_hash(const struct nlattr *key, size_t key_len)
1689 BUILD_ASSERT_DECL(!(NLA_ALIGNTO % sizeof(uint32_t)));
1690 return hash_words((const uint32_t *) key, key_len / sizeof(uint32_t), 0);
1694 log_odp_key_attributes(struct vlog_rate_limit *rl, const char *title,
1695 uint64_t attrs, int out_of_range_attr,
1696 const struct nlattr *key, size_t key_len)
1701 if (VLOG_DROP_DBG(rl)) {
1706 for (i = 0; i < 64; i++) {
1707 if (attrs & (UINT64_C(1) << i)) {
1708 ds_put_format(&s, " %s", ovs_key_attr_to_string(i));
1711 if (out_of_range_attr) {
1712 ds_put_format(&s, " %d (and possibly others)", out_of_range_attr);
1715 ds_put_cstr(&s, ": ");
1716 odp_flow_key_format(key, key_len, &s);
1718 VLOG_DBG("%s:%s", title, ds_cstr(&s));
1723 odp_to_ovs_frag(uint8_t odp_frag, struct flow *flow)
1725 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1727 if (odp_frag > OVS_FRAG_TYPE_LATER) {
1728 VLOG_ERR_RL(&rl, "invalid frag %"PRIu8" in flow key", odp_frag);
1732 if (odp_frag != OVS_FRAG_TYPE_NONE) {
1733 flow->nw_frag |= FLOW_NW_FRAG_ANY;
1734 if (odp_frag == OVS_FRAG_TYPE_LATER) {
1735 flow->nw_frag |= FLOW_NW_FRAG_LATER;
1742 parse_flow_nlattrs(const struct nlattr *key, size_t key_len,
1743 const struct nlattr *attrs[], uint64_t *present_attrsp,
1744 int *out_of_range_attrp)
1746 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
1747 const struct nlattr *nla;
1748 uint64_t present_attrs;
1751 BUILD_ASSERT(OVS_KEY_ATTR_MAX < CHAR_BIT * sizeof present_attrs);
1753 *out_of_range_attrp = 0;
1754 NL_ATTR_FOR_EACH (nla, left, key, key_len) {
1755 uint16_t type = nl_attr_type(nla);
1756 size_t len = nl_attr_get_size(nla);
1757 int expected_len = odp_flow_key_attr_len(type);
1759 if (len != expected_len && expected_len >= 0) {
1760 VLOG_ERR_RL(&rl, "attribute %s has length %zu but should have "
1761 "length %d", ovs_key_attr_to_string(type),
1766 if (type > OVS_KEY_ATTR_MAX) {
1767 *out_of_range_attrp = type;
1769 if (present_attrs & (UINT64_C(1) << type)) {
1770 VLOG_ERR_RL(&rl, "duplicate %s attribute in flow key",
1771 ovs_key_attr_to_string(type));
1775 present_attrs |= UINT64_C(1) << type;
1780 VLOG_ERR_RL(&rl, "trailing garbage in flow key");
1784 *present_attrsp = present_attrs;
1788 static enum odp_key_fitness
1789 check_expectations(uint64_t present_attrs, int out_of_range_attr,
1790 uint64_t expected_attrs,
1791 const struct nlattr *key, size_t key_len)
1793 uint64_t missing_attrs;
1794 uint64_t extra_attrs;
1796 missing_attrs = expected_attrs & ~present_attrs;
1797 if (missing_attrs) {
1798 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
1799 log_odp_key_attributes(&rl, "expected but not present",
1800 missing_attrs, 0, key, key_len);
1801 return ODP_FIT_TOO_LITTLE;
1804 extra_attrs = present_attrs & ~expected_attrs;
1805 if (extra_attrs || out_of_range_attr) {
1806 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
1807 log_odp_key_attributes(&rl, "present but not expected",
1808 extra_attrs, out_of_range_attr, key, key_len);
1809 return ODP_FIT_TOO_MUCH;
1812 return ODP_FIT_PERFECT;
1816 parse_ethertype(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
1817 uint64_t present_attrs, uint64_t *expected_attrs,
1820 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1822 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE)) {
1823 flow->dl_type = nl_attr_get_be16(attrs[OVS_KEY_ATTR_ETHERTYPE]);
1824 if (ntohs(flow->dl_type) < 1536) {
1825 VLOG_ERR_RL(&rl, "invalid Ethertype %"PRIu16" in flow key",
1826 ntohs(flow->dl_type));
1829 *expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE;
1831 flow->dl_type = htons(FLOW_DL_TYPE_NONE);
1836 static enum odp_key_fitness
1837 parse_l2_5_onward(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
1838 uint64_t present_attrs, int out_of_range_attr,
1839 uint64_t expected_attrs, struct flow *flow,
1840 const struct nlattr *key, size_t key_len)
1842 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1844 if (eth_type_mpls(flow->dl_type)) {
1845 expected_attrs |= (UINT64_C(1) << OVS_KEY_ATTR_MPLS);
1847 if (!(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_MPLS))) {
1848 return ODP_FIT_TOO_LITTLE;
1850 flow->mpls_lse = nl_attr_get_be32(attrs[OVS_KEY_ATTR_MPLS]);
1852 } else if (flow->dl_type == htons(ETH_TYPE_IP)) {
1853 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV4;
1854 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV4)) {
1855 const struct ovs_key_ipv4 *ipv4_key;
1857 ipv4_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV4]);
1858 flow->nw_src = ipv4_key->ipv4_src;
1859 flow->nw_dst = ipv4_key->ipv4_dst;
1860 flow->nw_proto = ipv4_key->ipv4_proto;
1861 flow->nw_tos = ipv4_key->ipv4_tos;
1862 flow->nw_ttl = ipv4_key->ipv4_ttl;
1863 if (!odp_to_ovs_frag(ipv4_key->ipv4_frag, flow)) {
1864 return ODP_FIT_ERROR;
1867 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1868 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV6;
1869 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV6)) {
1870 const struct ovs_key_ipv6 *ipv6_key;
1872 ipv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV6]);
1873 memcpy(&flow->ipv6_src, ipv6_key->ipv6_src, sizeof flow->ipv6_src);
1874 memcpy(&flow->ipv6_dst, ipv6_key->ipv6_dst, sizeof flow->ipv6_dst);
1875 flow->ipv6_label = ipv6_key->ipv6_label;
1876 flow->nw_proto = ipv6_key->ipv6_proto;
1877 flow->nw_tos = ipv6_key->ipv6_tclass;
1878 flow->nw_ttl = ipv6_key->ipv6_hlimit;
1879 if (!odp_to_ovs_frag(ipv6_key->ipv6_frag, flow)) {
1880 return ODP_FIT_ERROR;
1883 } else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
1884 flow->dl_type == htons(ETH_TYPE_RARP)) {
1885 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ARP;
1886 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ARP)) {
1887 const struct ovs_key_arp *arp_key;
1889 arp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ARP]);
1890 flow->nw_src = arp_key->arp_sip;
1891 flow->nw_dst = arp_key->arp_tip;
1892 if (arp_key->arp_op & htons(0xff00)) {
1893 VLOG_ERR_RL(&rl, "unsupported ARP opcode %"PRIu16" in flow "
1894 "key", ntohs(arp_key->arp_op));
1895 return ODP_FIT_ERROR;
1897 flow->nw_proto = ntohs(arp_key->arp_op);
1898 memcpy(flow->arp_sha, arp_key->arp_sha, ETH_ADDR_LEN);
1899 memcpy(flow->arp_tha, arp_key->arp_tha, ETH_ADDR_LEN);
1903 if (flow->nw_proto == IPPROTO_TCP
1904 && (flow->dl_type == htons(ETH_TYPE_IP) ||
1905 flow->dl_type == htons(ETH_TYPE_IPV6))
1906 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1907 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TCP;
1908 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TCP)) {
1909 const struct ovs_key_tcp *tcp_key;
1911 tcp_key = nl_attr_get(attrs[OVS_KEY_ATTR_TCP]);
1912 flow->tp_src = tcp_key->tcp_src;
1913 flow->tp_dst = tcp_key->tcp_dst;
1915 } else if (flow->nw_proto == IPPROTO_UDP
1916 && (flow->dl_type == htons(ETH_TYPE_IP) ||
1917 flow->dl_type == htons(ETH_TYPE_IPV6))
1918 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1919 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_UDP;
1920 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_UDP)) {
1921 const struct ovs_key_udp *udp_key;
1923 udp_key = nl_attr_get(attrs[OVS_KEY_ATTR_UDP]);
1924 flow->tp_src = udp_key->udp_src;
1925 flow->tp_dst = udp_key->udp_dst;
1927 } else if (flow->nw_proto == IPPROTO_ICMP
1928 && flow->dl_type == htons(ETH_TYPE_IP)
1929 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1930 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMP;
1931 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ICMP)) {
1932 const struct ovs_key_icmp *icmp_key;
1934 icmp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMP]);
1935 flow->tp_src = htons(icmp_key->icmp_type);
1936 flow->tp_dst = htons(icmp_key->icmp_code);
1938 } else if (flow->nw_proto == IPPROTO_ICMPV6
1939 && flow->dl_type == htons(ETH_TYPE_IPV6)
1940 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1941 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMPV6;
1942 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ICMPV6)) {
1943 const struct ovs_key_icmpv6 *icmpv6_key;
1945 icmpv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMPV6]);
1946 flow->tp_src = htons(icmpv6_key->icmpv6_type);
1947 flow->tp_dst = htons(icmpv6_key->icmpv6_code);
1949 if (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
1950 flow->tp_src == htons(ND_NEIGHBOR_ADVERT)) {
1951 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ND;
1952 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ND)) {
1953 const struct ovs_key_nd *nd_key;
1955 nd_key = nl_attr_get(attrs[OVS_KEY_ATTR_ND]);
1956 memcpy(&flow->nd_target, nd_key->nd_target,
1957 sizeof flow->nd_target);
1958 memcpy(flow->arp_sha, nd_key->nd_sll, ETH_ADDR_LEN);
1959 memcpy(flow->arp_tha, nd_key->nd_tll, ETH_ADDR_LEN);
1965 return check_expectations(present_attrs, out_of_range_attr, expected_attrs,
1969 /* Parse 802.1Q header then encapsulated L3 attributes. */
1970 static enum odp_key_fitness
1971 parse_8021q_onward(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
1972 uint64_t present_attrs, int out_of_range_attr,
1973 uint64_t expected_attrs, struct flow *flow,
1974 const struct nlattr *key, size_t key_len)
1976 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1978 const struct nlattr *encap
1979 = (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ENCAP)
1980 ? attrs[OVS_KEY_ATTR_ENCAP] : NULL);
1981 enum odp_key_fitness encap_fitness;
1982 enum odp_key_fitness fitness;
1985 /* Calulate fitness of outer attributes. */
1986 expected_attrs |= ((UINT64_C(1) << OVS_KEY_ATTR_VLAN) |
1987 (UINT64_C(1) << OVS_KEY_ATTR_ENCAP));
1988 fitness = check_expectations(present_attrs, out_of_range_attr,
1989 expected_attrs, key, key_len);
1991 /* Get the VLAN TCI value. */
1992 if (!(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_VLAN))) {
1993 return ODP_FIT_TOO_LITTLE;
1995 tci = nl_attr_get_be16(attrs[OVS_KEY_ATTR_VLAN]);
1996 if (tci == htons(0)) {
1997 /* Corner case for a truncated 802.1Q header. */
1998 if (fitness == ODP_FIT_PERFECT && nl_attr_get_size(encap)) {
1999 return ODP_FIT_TOO_MUCH;
2002 } else if (!(tci & htons(VLAN_CFI))) {
2003 VLOG_ERR_RL(&rl, "OVS_KEY_ATTR_VLAN 0x%04"PRIx16" is nonzero "
2004 "but CFI bit is not set", ntohs(tci));
2005 return ODP_FIT_ERROR;
2009 * Remove the TPID from dl_type since it's not the real Ethertype. */
2010 flow->vlan_tci = tci;
2011 flow->dl_type = htons(0);
2013 /* Now parse the encapsulated attributes. */
2014 if (!parse_flow_nlattrs(nl_attr_get(encap), nl_attr_get_size(encap),
2015 attrs, &present_attrs, &out_of_range_attr)) {
2016 return ODP_FIT_ERROR;
2020 if (!parse_ethertype(attrs, present_attrs, &expected_attrs, flow)) {
2021 return ODP_FIT_ERROR;
2023 encap_fitness = parse_l2_5_onward(attrs, present_attrs, out_of_range_attr,
2024 expected_attrs, flow, key, key_len);
2026 /* The overall fitness is the worse of the outer and inner attributes. */
2027 return MAX(fitness, encap_fitness);
2030 /* Converts the 'key_len' bytes of OVS_KEY_ATTR_* attributes in 'key' to a flow
2031 * structure in 'flow'. Returns an ODP_FIT_* value that indicates how well
2032 * 'key' fits our expectations for what a flow key should contain.
2034 * The 'in_port' will be the datapath's understanding of the port. The
2035 * caller will need to translate with odp_port_to_ofp_port() if the
2036 * OpenFlow port is needed.
2038 * This function doesn't take the packet itself as an argument because none of
2039 * the currently understood OVS_KEY_ATTR_* attributes require it. Currently,
2040 * it is always possible to infer which additional attribute(s) should appear
2041 * by looking at the attributes for lower-level protocols, e.g. if the network
2042 * protocol in OVS_KEY_ATTR_IPV4 or OVS_KEY_ATTR_IPV6 is IPPROTO_TCP then we
2043 * know that a OVS_KEY_ATTR_TCP attribute must appear and that otherwise it
2044 * must be absent. */
2045 enum odp_key_fitness
2046 odp_flow_key_to_flow(const struct nlattr *key, size_t key_len,
2049 const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1];
2050 uint64_t expected_attrs;
2051 uint64_t present_attrs;
2052 int out_of_range_attr;
2054 memset(flow, 0, sizeof *flow);
2056 /* Parse attributes. */
2057 if (!parse_flow_nlattrs(key, key_len, attrs, &present_attrs,
2058 &out_of_range_attr)) {
2059 return ODP_FIT_ERROR;
2064 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_PRIORITY)) {
2065 flow->skb_priority = nl_attr_get_u32(attrs[OVS_KEY_ATTR_PRIORITY]);
2066 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_PRIORITY;
2069 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_SKB_MARK)) {
2070 flow->skb_mark = nl_attr_get_u32(attrs[OVS_KEY_ATTR_SKB_MARK]);
2071 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_SKB_MARK;
2074 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TUNNEL)) {
2075 enum odp_key_fitness res;
2077 res = tun_key_from_attr(attrs[OVS_KEY_ATTR_TUNNEL], &flow->tunnel);
2078 if (res == ODP_FIT_ERROR) {
2079 return ODP_FIT_ERROR;
2080 } else if (res == ODP_FIT_PERFECT) {
2081 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TUNNEL;
2085 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IN_PORT)) {
2086 flow->in_port = nl_attr_get_u32(attrs[OVS_KEY_ATTR_IN_PORT]);
2087 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IN_PORT;
2089 flow->in_port = OVSP_NONE;
2092 /* Ethernet header. */
2093 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ETHERNET)) {
2094 const struct ovs_key_ethernet *eth_key;
2096 eth_key = nl_attr_get(attrs[OVS_KEY_ATTR_ETHERNET]);
2097 memcpy(flow->dl_src, eth_key->eth_src, ETH_ADDR_LEN);
2098 memcpy(flow->dl_dst, eth_key->eth_dst, ETH_ADDR_LEN);
2100 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERNET;
2102 /* Get Ethertype or 802.1Q TPID or FLOW_DL_TYPE_NONE. */
2103 if (!parse_ethertype(attrs, present_attrs, &expected_attrs, flow)) {
2104 return ODP_FIT_ERROR;
2107 if (flow->dl_type == htons(ETH_TYPE_VLAN)) {
2108 return parse_8021q_onward(attrs, present_attrs, out_of_range_attr,
2109 expected_attrs, flow, key, key_len);
2111 return parse_l2_5_onward(attrs, present_attrs, out_of_range_attr,
2112 expected_attrs, flow, key, key_len);
2115 /* Returns 'fitness' as a string, for use in debug messages. */
2117 odp_key_fitness_to_string(enum odp_key_fitness fitness)
2120 case ODP_FIT_PERFECT:
2122 case ODP_FIT_TOO_MUCH:
2124 case ODP_FIT_TOO_LITTLE:
2125 return "too_little";
2133 /* Appends an OVS_ACTION_ATTR_USERSPACE action to 'odp_actions' that specifies
2134 * Netlink PID 'pid'. If 'userdata' is nonnull, adds a userdata attribute
2135 * whose contents are the 'userdata_size' bytes at 'userdata' and returns the
2136 * offset within 'odp_actions' of the start of the cookie. (If 'userdata' is
2137 * null, then the return value is not meaningful.) */
2139 odp_put_userspace_action(uint32_t pid,
2140 const void *userdata, size_t userdata_size,
2141 struct ofpbuf *odp_actions)
2143 size_t userdata_ofs;
2146 offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_USERSPACE);
2147 nl_msg_put_u32(odp_actions, OVS_USERSPACE_ATTR_PID, pid);
2149 userdata_ofs = odp_actions->size + NLA_HDRLEN;
2150 nl_msg_put_unspec(odp_actions, OVS_USERSPACE_ATTR_USERDATA,
2151 userdata, userdata_size);
2155 nl_msg_end_nested(odp_actions, offset);
2157 return userdata_ofs;
2161 odp_put_tunnel_action(const struct flow_tnl *tunnel,
2162 struct ofpbuf *odp_actions)
2164 size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
2165 tun_key_to_attr(odp_actions, tunnel);
2166 nl_msg_end_nested(odp_actions, offset);
2169 /* The commit_odp_actions() function and its helpers. */
2172 commit_set_action(struct ofpbuf *odp_actions, enum ovs_key_attr key_type,
2173 const void *key, size_t key_size)
2175 size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
2176 nl_msg_put_unspec(odp_actions, key_type, key, key_size);
2177 nl_msg_end_nested(odp_actions, offset);
2181 odp_put_skb_mark_action(const uint32_t skb_mark,
2182 struct ofpbuf *odp_actions)
2184 commit_set_action(odp_actions, OVS_KEY_ATTR_SKB_MARK, &skb_mark,
2188 /* If any of the flow key data that ODP actions can modify are different in
2189 * 'base->tunnel' and 'flow->tunnel', appends a set_tunnel ODP action to
2190 * 'odp_actions' that change the flow tunneling information in key from
2191 * 'base->tunnel' into 'flow->tunnel', and then changes 'base->tunnel' in the
2192 * same way. In other words, operates the same as commit_odp_actions(), but
2193 * only on tunneling information. */
2195 commit_odp_tunnel_action(const struct flow *flow, struct flow *base,
2196 struct ofpbuf *odp_actions)
2198 /* A valid IPV4_TUNNEL must have non-zero ip_dst. */
2199 if (flow->tunnel.ip_dst) {
2200 if (!memcmp(&base->tunnel, &flow->tunnel, sizeof base->tunnel)) {
2203 memcpy(&base->tunnel, &flow->tunnel, sizeof base->tunnel);
2204 odp_put_tunnel_action(&base->tunnel, odp_actions);
2209 commit_set_ether_addr_action(const struct flow *flow, struct flow *base,
2210 struct ofpbuf *odp_actions)
2212 struct ovs_key_ethernet eth_key;
2214 if (eth_addr_equals(base->dl_src, flow->dl_src) &&
2215 eth_addr_equals(base->dl_dst, flow->dl_dst)) {
2219 memcpy(base->dl_src, flow->dl_src, ETH_ADDR_LEN);
2220 memcpy(base->dl_dst, flow->dl_dst, ETH_ADDR_LEN);
2222 memcpy(eth_key.eth_src, base->dl_src, ETH_ADDR_LEN);
2223 memcpy(eth_key.eth_dst, base->dl_dst, ETH_ADDR_LEN);
2225 commit_set_action(odp_actions, OVS_KEY_ATTR_ETHERNET,
2226 ð_key, sizeof(eth_key));
2230 commit_vlan_action(const struct flow *flow, struct flow *base,
2231 struct ofpbuf *odp_actions)
2233 if (base->vlan_tci == flow->vlan_tci) {
2237 if (base->vlan_tci & htons(VLAN_CFI)) {
2238 nl_msg_put_flag(odp_actions, OVS_ACTION_ATTR_POP_VLAN);
2241 if (flow->vlan_tci & htons(VLAN_CFI)) {
2242 struct ovs_action_push_vlan vlan;
2244 vlan.vlan_tpid = htons(ETH_TYPE_VLAN);
2245 vlan.vlan_tci = flow->vlan_tci;
2246 nl_msg_put_unspec(odp_actions, OVS_ACTION_ATTR_PUSH_VLAN,
2247 &vlan, sizeof vlan);
2249 base->vlan_tci = flow->vlan_tci;
2253 commit_mpls_action(const struct flow *flow, struct flow *base,
2254 struct ofpbuf *odp_actions)
2256 if (flow->mpls_lse == base->mpls_lse &&
2257 flow->mpls_depth == base->mpls_depth) {
2261 if (flow->mpls_depth < base->mpls_depth) {
2262 if (base->mpls_depth - flow->mpls_depth > 1) {
2263 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
2264 VLOG_WARN_RL(&rl, "Multiple mpls_pop actions reduced to "
2265 " a single mpls_pop action");
2268 nl_msg_put_be16(odp_actions, OVS_ACTION_ATTR_POP_MPLS, flow->dl_type);
2269 } else if (flow->mpls_depth > base->mpls_depth) {
2270 struct ovs_action_push_mpls *mpls;
2272 if (flow->mpls_depth - base->mpls_depth > 1) {
2273 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
2274 VLOG_WARN_RL(&rl, "Multiple mpls_push actions reduced to "
2275 " a single mpls_push action");
2278 mpls = nl_msg_put_unspec_uninit(odp_actions, OVS_ACTION_ATTR_PUSH_MPLS,
2280 memset(mpls, 0, sizeof *mpls);
2281 mpls->mpls_ethertype = flow->dl_type;
2282 mpls->mpls_lse = flow->mpls_lse;
2284 struct ovs_key_mpls mpls_key;
2286 mpls_key.mpls_lse = flow->mpls_lse;
2287 commit_set_action(odp_actions, OVS_KEY_ATTR_MPLS,
2288 &mpls_key, sizeof(mpls_key));
2291 base->dl_type = flow->dl_type;
2292 base->mpls_lse = flow->mpls_lse;
2293 base->mpls_depth = flow->mpls_depth;
2297 commit_set_ipv4_action(const struct flow *flow, struct flow *base,
2298 struct ofpbuf *odp_actions)
2300 struct ovs_key_ipv4 ipv4_key;
2302 if (base->nw_src == flow->nw_src &&
2303 base->nw_dst == flow->nw_dst &&
2304 base->nw_tos == flow->nw_tos &&
2305 base->nw_ttl == flow->nw_ttl &&
2306 base->nw_frag == flow->nw_frag) {
2310 ipv4_key.ipv4_src = base->nw_src = flow->nw_src;
2311 ipv4_key.ipv4_dst = base->nw_dst = flow->nw_dst;
2312 ipv4_key.ipv4_tos = base->nw_tos = flow->nw_tos;
2313 ipv4_key.ipv4_ttl = base->nw_ttl = flow->nw_ttl;
2314 ipv4_key.ipv4_proto = base->nw_proto;
2315 ipv4_key.ipv4_frag = ovs_to_odp_frag(base->nw_frag);
2317 commit_set_action(odp_actions, OVS_KEY_ATTR_IPV4,
2318 &ipv4_key, sizeof(ipv4_key));
2322 commit_set_ipv6_action(const struct flow *flow, struct flow *base,
2323 struct ofpbuf *odp_actions)
2325 struct ovs_key_ipv6 ipv6_key;
2327 if (ipv6_addr_equals(&base->ipv6_src, &flow->ipv6_src) &&
2328 ipv6_addr_equals(&base->ipv6_dst, &flow->ipv6_dst) &&
2329 base->ipv6_label == flow->ipv6_label &&
2330 base->nw_tos == flow->nw_tos &&
2331 base->nw_ttl == flow->nw_ttl &&
2332 base->nw_frag == flow->nw_frag) {
2336 base->ipv6_src = flow->ipv6_src;
2337 memcpy(&ipv6_key.ipv6_src, &base->ipv6_src, sizeof(ipv6_key.ipv6_src));
2338 base->ipv6_dst = flow->ipv6_dst;
2339 memcpy(&ipv6_key.ipv6_dst, &base->ipv6_dst, sizeof(ipv6_key.ipv6_dst));
2341 ipv6_key.ipv6_label = base->ipv6_label = flow->ipv6_label;
2342 ipv6_key.ipv6_tclass = base->nw_tos = flow->nw_tos;
2343 ipv6_key.ipv6_hlimit = base->nw_ttl = flow->nw_ttl;
2344 ipv6_key.ipv6_proto = base->nw_proto;
2345 ipv6_key.ipv6_frag = ovs_to_odp_frag(base->nw_frag);
2347 commit_set_action(odp_actions, OVS_KEY_ATTR_IPV6,
2348 &ipv6_key, sizeof(ipv6_key));
2352 commit_set_nw_action(const struct flow *flow, struct flow *base,
2353 struct ofpbuf *odp_actions)
2355 /* Check if flow really have an IP header. */
2356 if (!flow->nw_proto) {
2360 if (base->dl_type == htons(ETH_TYPE_IP)) {
2361 commit_set_ipv4_action(flow, base, odp_actions);
2362 } else if (base->dl_type == htons(ETH_TYPE_IPV6)) {
2363 commit_set_ipv6_action(flow, base, odp_actions);
2368 commit_set_port_action(const struct flow *flow, struct flow *base,
2369 struct ofpbuf *odp_actions)
2371 if (!is_ip_any(base) || (!base->tp_src && !base->tp_dst)) {
2375 if (base->tp_src == flow->tp_src &&
2376 base->tp_dst == flow->tp_dst) {
2380 if (flow->nw_proto == IPPROTO_TCP) {
2381 struct ovs_key_tcp port_key;
2383 port_key.tcp_src = base->tp_src = flow->tp_src;
2384 port_key.tcp_dst = base->tp_dst = flow->tp_dst;
2386 commit_set_action(odp_actions, OVS_KEY_ATTR_TCP,
2387 &port_key, sizeof(port_key));
2389 } else if (flow->nw_proto == IPPROTO_UDP) {
2390 struct ovs_key_udp port_key;
2392 port_key.udp_src = base->tp_src = flow->tp_src;
2393 port_key.udp_dst = base->tp_dst = flow->tp_dst;
2395 commit_set_action(odp_actions, OVS_KEY_ATTR_UDP,
2396 &port_key, sizeof(port_key));
2401 commit_set_priority_action(const struct flow *flow, struct flow *base,
2402 struct ofpbuf *odp_actions)
2404 if (base->skb_priority == flow->skb_priority) {
2407 base->skb_priority = flow->skb_priority;
2409 commit_set_action(odp_actions, OVS_KEY_ATTR_PRIORITY,
2410 &base->skb_priority, sizeof(base->skb_priority));
2414 commit_set_skb_mark_action(const struct flow *flow, struct flow *base,
2415 struct ofpbuf *odp_actions)
2417 if (base->skb_mark == flow->skb_mark) {
2420 base->skb_mark = flow->skb_mark;
2422 odp_put_skb_mark_action(base->skb_mark, odp_actions);
2424 /* If any of the flow key data that ODP actions can modify are different in
2425 * 'base' and 'flow', appends ODP actions to 'odp_actions' that change the flow
2426 * key from 'base' into 'flow', and then changes 'base' the same way. Does not
2427 * commit set_tunnel actions. Users should call commit_odp_tunnel_action()
2428 * in addition to this function if needed. */
2430 commit_odp_actions(const struct flow *flow, struct flow *base,
2431 struct ofpbuf *odp_actions)
2433 commit_set_ether_addr_action(flow, base, odp_actions);
2434 commit_vlan_action(flow, base, odp_actions);
2435 commit_set_nw_action(flow, base, odp_actions);
2436 commit_set_port_action(flow, base, odp_actions);
2437 /* Commiting MPLS actions should occur after committing nw and port
2438 * actions. This is because committing MPLS actions may alter a packet so
2439 * that it is no longer IP and thus nw and port actions are no longer valid.
2441 commit_mpls_action(flow, base, odp_actions);
2442 commit_set_priority_action(flow, base, odp_actions);
2443 commit_set_skb_mark_action(flow, base, odp_actions);