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_TUN_ID: return "tun_id";
100 case OVS_KEY_ATTR_TUNNEL: return "tunnel";
101 case OVS_KEY_ATTR_IN_PORT: return "in_port";
102 case OVS_KEY_ATTR_ETHERNET: return "eth";
103 case OVS_KEY_ATTR_VLAN: return "vlan";
104 case OVS_KEY_ATTR_ETHERTYPE: return "eth_type";
105 case OVS_KEY_ATTR_IPV4: return "ipv4";
106 case OVS_KEY_ATTR_IPV6: return "ipv6";
107 case OVS_KEY_ATTR_TCP: return "tcp";
108 case OVS_KEY_ATTR_UDP: return "udp";
109 case OVS_KEY_ATTR_ICMP: return "icmp";
110 case OVS_KEY_ATTR_ICMPV6: return "icmpv6";
111 case OVS_KEY_ATTR_ARP: return "arp";
112 case OVS_KEY_ATTR_ND: return "nd";
113 case OVS_KEY_ATTR_MPLS: return "mpls";
115 case __OVS_KEY_ATTR_MAX:
117 snprintf(unknown_attr, sizeof unknown_attr, "key%u",
118 (unsigned int) attr);
124 format_generic_odp_action(struct ds *ds, const struct nlattr *a)
126 size_t len = nl_attr_get_size(a);
128 ds_put_format(ds, "action%"PRId16, nl_attr_type(a));
130 const uint8_t *unspec;
133 unspec = nl_attr_get(a);
134 for (i = 0; i < len; i++) {
135 ds_put_char(ds, i ? ' ': '(');
136 ds_put_format(ds, "%02x", unspec[i]);
138 ds_put_char(ds, ')');
143 format_odp_sample_action(struct ds *ds, const struct nlattr *attr)
145 static const struct nl_policy ovs_sample_policy[] = {
146 [OVS_SAMPLE_ATTR_PROBABILITY] = { .type = NL_A_U32 },
147 [OVS_SAMPLE_ATTR_ACTIONS] = { .type = NL_A_NESTED }
149 struct nlattr *a[ARRAY_SIZE(ovs_sample_policy)];
151 const struct nlattr *nla_acts;
154 ds_put_cstr(ds, "sample");
156 if (!nl_parse_nested(attr, ovs_sample_policy, a, ARRAY_SIZE(a))) {
157 ds_put_cstr(ds, "(error)");
161 percentage = (100.0 * nl_attr_get_u32(a[OVS_SAMPLE_ATTR_PROBABILITY])) /
164 ds_put_format(ds, "(sample=%.1f%%,", percentage);
166 ds_put_cstr(ds, "actions(");
167 nla_acts = nl_attr_get(a[OVS_SAMPLE_ATTR_ACTIONS]);
168 len = nl_attr_get_size(a[OVS_SAMPLE_ATTR_ACTIONS]);
169 format_odp_actions(ds, nla_acts, len);
170 ds_put_format(ds, "))");
174 slow_path_reason_to_string(uint32_t data)
176 enum slow_path_reason bit = (enum slow_path_reason) data;
187 case SLOW_CONTROLLER:
197 parse_flags(const char *s, const char *(*bit_to_string)(uint32_t),
208 while (s[n] != ')') {
209 unsigned long long int flags;
213 if (sscanf(&s[n], "%lli%n", &flags, &n0) > 0 && n0 > 0) {
214 n += n0 + (s[n + n0] == ',');
219 for (bit = 1; bit; bit <<= 1) {
220 const char *name = bit_to_string(bit);
228 if (!strncmp(s + n, name, len) &&
229 (s[n + len] == ',' || s[n + len] == ')')) {
231 n += len + (s[n + len] == ',');
247 format_odp_userspace_action(struct ds *ds, const struct nlattr *attr)
249 static const struct nl_policy ovs_userspace_policy[] = {
250 [OVS_USERSPACE_ATTR_PID] = { .type = NL_A_U32 },
251 [OVS_USERSPACE_ATTR_USERDATA] = { .type = NL_A_UNSPEC,
254 struct nlattr *a[ARRAY_SIZE(ovs_userspace_policy)];
255 const struct nlattr *userdata_attr;
257 if (!nl_parse_nested(attr, ovs_userspace_policy, a, ARRAY_SIZE(a))) {
258 ds_put_cstr(ds, "userspace(error)");
262 ds_put_format(ds, "userspace(pid=%"PRIu32,
263 nl_attr_get_u32(a[OVS_USERSPACE_ATTR_PID]));
265 userdata_attr = a[OVS_USERSPACE_ATTR_USERDATA];
266 if (userdata_attr && nl_attr_get_size(userdata_attr) == sizeof(uint64_t)) {
267 uint64_t userdata = nl_attr_get_u64(a[OVS_USERSPACE_ATTR_USERDATA]);
268 union user_action_cookie cookie;
270 memcpy(&cookie, &userdata, sizeof cookie);
272 switch (cookie.type) {
273 case USER_ACTION_COOKIE_SFLOW:
274 ds_put_format(ds, ",sFlow("
275 "vid=%"PRIu16",pcp=%"PRIu8",output=%"PRIu32")",
276 vlan_tci_to_vid(cookie.sflow.vlan_tci),
277 vlan_tci_to_pcp(cookie.sflow.vlan_tci),
278 cookie.sflow.output);
281 case USER_ACTION_COOKIE_SLOW_PATH:
282 ds_put_cstr(ds, ",slow_path(");
283 format_flags(ds, slow_path_reason_to_string,
284 cookie.slow_path.reason, ',');
285 ds_put_format(ds, ")");
288 case USER_ACTION_COOKIE_UNSPEC:
290 ds_put_format(ds, ",userdata=0x%"PRIx64, userdata);
293 } else if (userdata_attr) {
294 const uint8_t *userdata = nl_attr_get(userdata_attr);
295 size_t len = nl_attr_get_size(userdata_attr);
298 ds_put_format(ds, ",userdata(");
299 for (i = 0; i < len; i++) {
300 ds_put_format(ds, "%02x", userdata[i]);
302 ds_put_char(ds, ')');
305 ds_put_char(ds, ')');
309 format_vlan_tci(struct ds *ds, ovs_be16 vlan_tci)
311 ds_put_format(ds, "vid=%"PRIu16",pcp=%d",
312 vlan_tci_to_vid(vlan_tci),
313 vlan_tci_to_pcp(vlan_tci));
314 if (!(vlan_tci & htons(VLAN_CFI))) {
315 ds_put_cstr(ds, ",cfi=0");
320 format_mpls_lse(struct ds *ds, ovs_be32 mpls_lse)
322 ds_put_format(ds, "label=%"PRIu32",tc=%d,ttl=%d,bos=%d",
323 mpls_lse_to_label(mpls_lse),
324 mpls_lse_to_tc(mpls_lse),
325 mpls_lse_to_ttl(mpls_lse),
326 mpls_lse_to_bos(mpls_lse));
330 format_odp_action(struct ds *ds, const struct nlattr *a)
333 enum ovs_action_attr type = nl_attr_type(a);
334 const struct ovs_action_push_vlan *vlan;
336 expected_len = odp_action_len(nl_attr_type(a));
337 if (expected_len != -2 && nl_attr_get_size(a) != expected_len) {
338 ds_put_format(ds, "bad length %zu, expected %d for: ",
339 nl_attr_get_size(a), expected_len);
340 format_generic_odp_action(ds, a);
345 case OVS_ACTION_ATTR_OUTPUT:
346 ds_put_format(ds, "%"PRIu16, nl_attr_get_u32(a));
348 case OVS_ACTION_ATTR_USERSPACE:
349 format_odp_userspace_action(ds, a);
351 case OVS_ACTION_ATTR_SET:
352 ds_put_cstr(ds, "set(");
353 format_odp_key_attr(nl_attr_get(a), ds);
354 ds_put_cstr(ds, ")");
356 case OVS_ACTION_ATTR_PUSH_VLAN:
357 vlan = nl_attr_get(a);
358 ds_put_cstr(ds, "push_vlan(");
359 if (vlan->vlan_tpid != htons(ETH_TYPE_VLAN)) {
360 ds_put_format(ds, "tpid=0x%04"PRIx16",", ntohs(vlan->vlan_tpid));
362 format_vlan_tci(ds, vlan->vlan_tci);
363 ds_put_char(ds, ')');
365 case OVS_ACTION_ATTR_POP_VLAN:
366 ds_put_cstr(ds, "pop_vlan");
368 case OVS_ACTION_ATTR_PUSH_MPLS: {
369 const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
370 ds_put_cstr(ds, "push_mpls(");
371 format_mpls_lse(ds, mpls->mpls_lse);
372 ds_put_format(ds, ",eth_type=0x%"PRIx16")", ntohs(mpls->mpls_ethertype));
375 case OVS_ACTION_ATTR_POP_MPLS: {
376 ovs_be16 ethertype = nl_attr_get_be16(a);
377 ds_put_format(ds, "pop_mpls(eth_type=0x%"PRIx16")", ntohs(ethertype));
380 case OVS_ACTION_ATTR_SAMPLE:
381 format_odp_sample_action(ds, a);
383 case OVS_ACTION_ATTR_UNSPEC:
384 case __OVS_ACTION_ATTR_MAX:
386 format_generic_odp_action(ds, a);
392 format_odp_actions(struct ds *ds, const struct nlattr *actions,
396 const struct nlattr *a;
399 NL_ATTR_FOR_EACH (a, left, actions, actions_len) {
401 ds_put_char(ds, ',');
403 format_odp_action(ds, a);
408 if (left == actions_len) {
409 ds_put_cstr(ds, "<empty>");
411 ds_put_format(ds, ",***%u leftover bytes*** (", left);
412 for (i = 0; i < left; i++) {
413 ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
415 ds_put_char(ds, ')');
418 ds_put_cstr(ds, "drop");
423 parse_odp_action(const char *s, const struct simap *port_names,
424 struct ofpbuf *actions)
426 /* Many of the sscanf calls in this function use oversized destination
427 * fields because some sscanf() implementations truncate the range of %i
428 * directives, so that e.g. "%"SCNi16 interprets input of "0xfedc" as a
429 * value of 0x7fff. The other alternatives are to allow only a single
430 * radix (e.g. decimal or hexadecimal) or to write more sophisticated
433 * The tun_id parser has to use an alternative approach because there is no
434 * type larger than 64 bits. */
437 unsigned long long int port;
440 if (sscanf(s, "%lli%n", &port, &n) > 0 && n > 0) {
441 nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, port);
447 int len = strcspn(s, delimiters);
448 struct simap_node *node;
450 node = simap_find_len(port_names, s, len);
452 nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, node->data);
458 unsigned long long int pid;
459 unsigned long long int output;
464 if (sscanf(s, "userspace(pid=%lli)%n", &pid, &n) > 0 && n > 0) {
465 odp_put_userspace_action(pid, NULL, 0, actions);
467 } else if (sscanf(s, "userspace(pid=%lli,sFlow(vid=%i,"
468 "pcp=%i,output=%lli))%n",
469 &pid, &vid, &pcp, &output, &n) > 0 && n > 0) {
470 union user_action_cookie cookie;
473 tci = vid | (pcp << VLAN_PCP_SHIFT);
478 cookie.type = USER_ACTION_COOKIE_SFLOW;
479 cookie.sflow.vlan_tci = htons(tci);
480 cookie.sflow.output = output;
481 odp_put_userspace_action(pid, &cookie, sizeof cookie, actions);
483 } else if (sscanf(s, "userspace(pid=%lli,slow_path%n", &pid, &n) > 0
485 union user_action_cookie cookie;
488 cookie.type = USER_ACTION_COOKIE_SLOW_PATH;
489 cookie.slow_path.unused = 0;
490 cookie.slow_path.reason = 0;
492 res = parse_flags(&s[n], slow_path_reason_to_string,
493 &cookie.slow_path.reason);
503 odp_put_userspace_action(pid, &cookie, sizeof cookie, actions);
505 } else if (sscanf(s, "userspace(pid=%lli,userdata="
506 "%31[x0123456789abcdefABCDEF])%n", &pid, userdata_s,
510 userdata = strtoull(userdata_s, NULL, 0);
511 odp_put_userspace_action(pid, &userdata, sizeof(userdata),
514 } else if (sscanf(s, "userspace(pid=%lli,userdata(%n", &pid, &n) > 0
519 ofpbuf_init(&buf, 16);
520 end = ofpbuf_put_hex(&buf, &s[n], NULL);
521 if (end[0] == ')' && end[1] == ')') {
522 odp_put_userspace_action(pid, buf.data, buf.size, actions);
524 return (end + 2) - s;
529 if (!strncmp(s, "set(", 4)) {
533 start_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SET);
534 retval = parse_odp_key_attr(s + 4, port_names, actions);
538 if (s[retval + 4] != ')') {
541 nl_msg_end_nested(actions, start_ofs);
546 struct ovs_action_push_vlan push;
547 int tpid = ETH_TYPE_VLAN;
552 if ((sscanf(s, "push_vlan(vid=%i,pcp=%i)%n", &vid, &pcp, &n) > 0
554 || (sscanf(s, "push_vlan(vid=%i,pcp=%i,cfi=%i)%n",
555 &vid, &pcp, &cfi, &n) > 0 && n > 0)
556 || (sscanf(s, "push_vlan(tpid=%i,vid=%i,pcp=%i)%n",
557 &tpid, &vid, &pcp, &n) > 0 && n > 0)
558 || (sscanf(s, "push_vlan(tpid=%i,vid=%i,pcp=%i,cfi=%i)%n",
559 &tpid, &vid, &pcp, &cfi, &n) > 0 && n > 0)) {
560 push.vlan_tpid = htons(tpid);
561 push.vlan_tci = htons((vid << VLAN_VID_SHIFT)
562 | (pcp << VLAN_PCP_SHIFT)
563 | (cfi ? VLAN_CFI : 0));
564 nl_msg_put_unspec(actions, OVS_ACTION_ATTR_PUSH_VLAN,
571 if (!strncmp(s, "pop_vlan", 8)) {
572 nl_msg_put_flag(actions, OVS_ACTION_ATTR_POP_VLAN);
580 if (sscanf(s, "sample(sample=%lf%%,actions(%n", &percentage, &n) > 0
581 && percentage >= 0. && percentage <= 100.0
583 size_t sample_ofs, actions_ofs;
586 probability = floor(UINT32_MAX * (percentage / 100.0) + .5);
587 sample_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SAMPLE);
588 nl_msg_put_u32(actions, OVS_SAMPLE_ATTR_PROBABILITY,
589 (probability <= 0 ? 0
590 : probability >= UINT32_MAX ? UINT32_MAX
593 actions_ofs = nl_msg_start_nested(actions,
594 OVS_SAMPLE_ATTR_ACTIONS);
598 n += strspn(s + n, delimiters);
603 retval = parse_odp_action(s + n, port_names, actions);
609 nl_msg_end_nested(actions, actions_ofs);
610 nl_msg_end_nested(actions, sample_ofs);
612 return s[n + 1] == ')' ? n + 2 : -EINVAL;
619 /* Parses the string representation of datapath actions, in the format output
620 * by format_odp_action(). Returns 0 if successful, otherwise a positive errno
621 * value. On success, the ODP actions are appended to 'actions' as a series of
622 * Netlink attributes. On failure, no data is appended to 'actions'. Either
623 * way, 'actions''s data might be reallocated. */
625 odp_actions_from_string(const char *s, const struct simap *port_names,
626 struct ofpbuf *actions)
630 if (!strcasecmp(s, "drop")) {
634 old_size = actions->size;
638 s += strspn(s, delimiters);
643 retval = parse_odp_action(s, port_names, actions);
644 if (retval < 0 || !strchr(delimiters, s[retval])) {
645 actions->size = old_size;
654 /* Returns the correct length of the payload for a flow key attribute of the
655 * specified 'type', -1 if 'type' is unknown, or -2 if the attribute's payload
656 * is variable length. */
658 odp_flow_key_attr_len(uint16_t type)
660 if (type > OVS_KEY_ATTR_MAX) {
664 switch ((enum ovs_key_attr) type) {
665 case OVS_KEY_ATTR_ENCAP: return -2;
666 case OVS_KEY_ATTR_PRIORITY: return 4;
667 case OVS_KEY_ATTR_SKB_MARK: return 4;
668 case OVS_KEY_ATTR_TUN_ID: return 8;
669 case OVS_KEY_ATTR_TUNNEL: return -2;
670 case OVS_KEY_ATTR_IN_PORT: return 4;
671 case OVS_KEY_ATTR_ETHERNET: return sizeof(struct ovs_key_ethernet);
672 case OVS_KEY_ATTR_VLAN: return sizeof(ovs_be16);
673 case OVS_KEY_ATTR_ETHERTYPE: return 2;
674 case OVS_KEY_ATTR_MPLS: return sizeof(struct ovs_key_mpls);
675 case OVS_KEY_ATTR_IPV4: return sizeof(struct ovs_key_ipv4);
676 case OVS_KEY_ATTR_IPV6: return sizeof(struct ovs_key_ipv6);
677 case OVS_KEY_ATTR_TCP: return sizeof(struct ovs_key_tcp);
678 case OVS_KEY_ATTR_UDP: return sizeof(struct ovs_key_udp);
679 case OVS_KEY_ATTR_ICMP: return sizeof(struct ovs_key_icmp);
680 case OVS_KEY_ATTR_ICMPV6: return sizeof(struct ovs_key_icmpv6);
681 case OVS_KEY_ATTR_ARP: return sizeof(struct ovs_key_arp);
682 case OVS_KEY_ATTR_ND: return sizeof(struct ovs_key_nd);
684 case OVS_KEY_ATTR_UNSPEC:
685 case __OVS_KEY_ATTR_MAX:
693 format_generic_odp_key(const struct nlattr *a, struct ds *ds)
695 size_t len = nl_attr_get_size(a);
697 const uint8_t *unspec;
700 unspec = nl_attr_get(a);
701 for (i = 0; i < len; i++) {
702 ds_put_char(ds, i ? ' ': '(');
703 ds_put_format(ds, "%02x", unspec[i]);
705 ds_put_char(ds, ')');
710 ovs_frag_type_to_string(enum ovs_frag_type type)
713 case OVS_FRAG_TYPE_NONE:
715 case OVS_FRAG_TYPE_FIRST:
717 case OVS_FRAG_TYPE_LATER:
719 case __OVS_FRAG_TYPE_MAX:
726 tunnel_key_attr_len(int type)
729 case OVS_TUNNEL_KEY_ATTR_ID: return 8;
730 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: return 4;
731 case OVS_TUNNEL_KEY_ATTR_IPV4_DST: return 4;
732 case OVS_TUNNEL_KEY_ATTR_TOS: return 1;
733 case OVS_TUNNEL_KEY_ATTR_TTL: return 1;
734 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: return 0;
735 case OVS_TUNNEL_KEY_ATTR_CSUM: return 0;
736 case __OVS_TUNNEL_KEY_ATTR_MAX:
742 static enum odp_key_fitness
743 tun_key_from_attr(const struct nlattr *attr, struct flow_tnl *tun)
746 const struct nlattr *a;
748 bool unknown = false;
750 NL_NESTED_FOR_EACH(a, left, attr) {
751 uint16_t type = nl_attr_type(a);
752 size_t len = nl_attr_get_size(a);
753 int expected_len = tunnel_key_attr_len(type);
755 if (len != expected_len && expected_len >= 0) {
756 return ODP_FIT_ERROR;
760 case OVS_TUNNEL_KEY_ATTR_ID:
761 tun->tun_id = nl_attr_get_be64(a);
762 tun->flags |= FLOW_TNL_F_KEY;
764 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
765 tun->ip_src = nl_attr_get_be32(a);
767 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
768 tun->ip_dst = nl_attr_get_be32(a);
770 case OVS_TUNNEL_KEY_ATTR_TOS:
771 tun->ip_tos = nl_attr_get_u8(a);
773 case OVS_TUNNEL_KEY_ATTR_TTL:
774 tun->ip_ttl = nl_attr_get_u8(a);
777 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
778 tun->flags |= FLOW_TNL_F_DONT_FRAGMENT;
780 case OVS_TUNNEL_KEY_ATTR_CSUM:
781 tun->flags |= FLOW_TNL_F_CSUM;
784 /* Allow this to show up as unexpected, if there are unknown
785 * tunnel attribute, eventually resulting in ODP_FIT_TOO_MUCH. */
792 return ODP_FIT_ERROR;
795 return ODP_FIT_TOO_MUCH;
797 return ODP_FIT_PERFECT;
801 tun_key_to_attr(struct ofpbuf *a, const struct flow_tnl *tun_key)
805 tun_key_ofs = nl_msg_start_nested(a, OVS_KEY_ATTR_TUNNEL);
807 if (tun_key->flags & FLOW_TNL_F_KEY) {
808 nl_msg_put_be64(a, OVS_TUNNEL_KEY_ATTR_ID, tun_key->tun_id);
810 if (tun_key->ip_src) {
811 nl_msg_put_be32(a, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, tun_key->ip_src);
813 if (tun_key->ip_dst) {
814 nl_msg_put_be32(a, OVS_TUNNEL_KEY_ATTR_IPV4_DST, tun_key->ip_dst);
816 if (tun_key->ip_tos) {
817 nl_msg_put_u8(a, OVS_TUNNEL_KEY_ATTR_TOS, tun_key->ip_tos);
819 nl_msg_put_u8(a, OVS_TUNNEL_KEY_ATTR_TTL, tun_key->ip_ttl);
820 if (tun_key->flags & FLOW_TNL_F_DONT_FRAGMENT) {
821 nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT);
823 if (tun_key->flags & FLOW_TNL_F_CSUM) {
824 nl_msg_put_flag(a, OVS_TUNNEL_KEY_ATTR_CSUM);
827 nl_msg_end_nested(a, tun_key_ofs);
831 format_odp_key_attr(const struct nlattr *a, struct ds *ds)
833 const struct ovs_key_ethernet *eth_key;
834 const struct ovs_key_ipv4 *ipv4_key;
835 const struct ovs_key_ipv6 *ipv6_key;
836 const struct ovs_key_tcp *tcp_key;
837 const struct ovs_key_udp *udp_key;
838 const struct ovs_key_icmp *icmp_key;
839 const struct ovs_key_icmpv6 *icmpv6_key;
840 const struct ovs_key_arp *arp_key;
841 const struct ovs_key_nd *nd_key;
842 struct flow_tnl tun_key;
843 enum ovs_key_attr attr = nl_attr_type(a);
846 ds_put_cstr(ds, ovs_key_attr_to_string(attr));
847 expected_len = odp_flow_key_attr_len(nl_attr_type(a));
848 if (expected_len != -2 && nl_attr_get_size(a) != expected_len) {
849 ds_put_format(ds, "(bad length %zu, expected %d)",
851 odp_flow_key_attr_len(nl_attr_type(a)));
852 format_generic_odp_key(a, ds);
857 case OVS_KEY_ATTR_ENCAP:
858 ds_put_cstr(ds, "(");
859 if (nl_attr_get_size(a)) {
860 odp_flow_key_format(nl_attr_get(a), nl_attr_get_size(a), ds);
862 ds_put_char(ds, ')');
865 case OVS_KEY_ATTR_PRIORITY:
866 ds_put_format(ds, "(%#"PRIx32")", nl_attr_get_u32(a));
869 case OVS_KEY_ATTR_SKB_MARK:
870 ds_put_format(ds, "(%#"PRIx32")", nl_attr_get_u32(a));
873 case OVS_KEY_ATTR_TUN_ID:
874 ds_put_format(ds, "(%#"PRIx64")", ntohll(nl_attr_get_be64(a)));
877 case OVS_KEY_ATTR_TUNNEL:
878 memset(&tun_key, 0, sizeof tun_key);
879 if (tun_key_from_attr(a, &tun_key) == ODP_FIT_ERROR) {
880 ds_put_format(ds, "(error)");
882 ds_put_format(ds, "(tun_id=0x%"PRIx64",src="IP_FMT",dst="IP_FMT","
883 "tos=0x%"PRIx8",ttl=%"PRIu8",flags(",
884 ntohll(tun_key.tun_id),
885 IP_ARGS(tun_key.ip_src),
886 IP_ARGS(tun_key.ip_dst),
887 tun_key.ip_tos, tun_key.ip_ttl);
889 format_flags(ds, flow_tun_flag_to_string,
890 (uint32_t) tun_key.flags, ',');
891 ds_put_format(ds, "))");
895 case OVS_KEY_ATTR_IN_PORT:
896 ds_put_format(ds, "(%"PRIu32")", nl_attr_get_u32(a));
899 case OVS_KEY_ATTR_ETHERNET:
900 eth_key = nl_attr_get(a);
901 ds_put_format(ds, "(src="ETH_ADDR_FMT",dst="ETH_ADDR_FMT")",
902 ETH_ADDR_ARGS(eth_key->eth_src),
903 ETH_ADDR_ARGS(eth_key->eth_dst));
906 case OVS_KEY_ATTR_VLAN:
907 ds_put_char(ds, '(');
908 format_vlan_tci(ds, nl_attr_get_be16(a));
909 ds_put_char(ds, ')');
912 case OVS_KEY_ATTR_MPLS: {
913 const struct ovs_key_mpls *mpls_key = nl_attr_get(a);
914 ds_put_char(ds, '(');
915 format_mpls_lse(ds, mpls_key->mpls_top_lse);
916 ds_put_char(ds, ')');
920 case OVS_KEY_ATTR_ETHERTYPE:
921 ds_put_format(ds, "(0x%04"PRIx16")",
922 ntohs(nl_attr_get_be16(a)));
925 case OVS_KEY_ATTR_IPV4:
926 ipv4_key = nl_attr_get(a);
927 ds_put_format(ds, "(src="IP_FMT",dst="IP_FMT",proto=%"PRIu8
928 ",tos=%#"PRIx8",ttl=%"PRIu8",frag=%s)",
929 IP_ARGS(ipv4_key->ipv4_src),
930 IP_ARGS(ipv4_key->ipv4_dst),
931 ipv4_key->ipv4_proto, ipv4_key->ipv4_tos,
933 ovs_frag_type_to_string(ipv4_key->ipv4_frag));
936 case OVS_KEY_ATTR_IPV6: {
937 char src_str[INET6_ADDRSTRLEN];
938 char dst_str[INET6_ADDRSTRLEN];
940 ipv6_key = nl_attr_get(a);
941 inet_ntop(AF_INET6, ipv6_key->ipv6_src, src_str, sizeof src_str);
942 inet_ntop(AF_INET6, ipv6_key->ipv6_dst, dst_str, sizeof dst_str);
944 ds_put_format(ds, "(src=%s,dst=%s,label=%#"PRIx32",proto=%"PRIu8
945 ",tclass=%#"PRIx8",hlimit=%"PRIu8",frag=%s)",
946 src_str, dst_str, ntohl(ipv6_key->ipv6_label),
947 ipv6_key->ipv6_proto, ipv6_key->ipv6_tclass,
948 ipv6_key->ipv6_hlimit,
949 ovs_frag_type_to_string(ipv6_key->ipv6_frag));
953 case OVS_KEY_ATTR_TCP:
954 tcp_key = nl_attr_get(a);
955 ds_put_format(ds, "(src=%"PRIu16",dst=%"PRIu16")",
956 ntohs(tcp_key->tcp_src), ntohs(tcp_key->tcp_dst));
959 case OVS_KEY_ATTR_UDP:
960 udp_key = nl_attr_get(a);
961 ds_put_format(ds, "(src=%"PRIu16",dst=%"PRIu16")",
962 ntohs(udp_key->udp_src), ntohs(udp_key->udp_dst));
965 case OVS_KEY_ATTR_ICMP:
966 icmp_key = nl_attr_get(a);
967 ds_put_format(ds, "(type=%"PRIu8",code=%"PRIu8")",
968 icmp_key->icmp_type, icmp_key->icmp_code);
971 case OVS_KEY_ATTR_ICMPV6:
972 icmpv6_key = nl_attr_get(a);
973 ds_put_format(ds, "(type=%"PRIu8",code=%"PRIu8")",
974 icmpv6_key->icmpv6_type, icmpv6_key->icmpv6_code);
977 case OVS_KEY_ATTR_ARP:
978 arp_key = nl_attr_get(a);
979 ds_put_format(ds, "(sip="IP_FMT",tip="IP_FMT",op=%"PRIu16","
980 "sha="ETH_ADDR_FMT",tha="ETH_ADDR_FMT")",
981 IP_ARGS(arp_key->arp_sip), IP_ARGS(arp_key->arp_tip),
982 ntohs(arp_key->arp_op), ETH_ADDR_ARGS(arp_key->arp_sha),
983 ETH_ADDR_ARGS(arp_key->arp_tha));
986 case OVS_KEY_ATTR_ND: {
987 char target[INET6_ADDRSTRLEN];
989 nd_key = nl_attr_get(a);
990 inet_ntop(AF_INET6, nd_key->nd_target, target, sizeof target);
992 ds_put_format(ds, "(target=%s", target);
993 if (!eth_addr_is_zero(nd_key->nd_sll)) {
994 ds_put_format(ds, ",sll="ETH_ADDR_FMT,
995 ETH_ADDR_ARGS(nd_key->nd_sll));
997 if (!eth_addr_is_zero(nd_key->nd_tll)) {
998 ds_put_format(ds, ",tll="ETH_ADDR_FMT,
999 ETH_ADDR_ARGS(nd_key->nd_tll));
1001 ds_put_char(ds, ')');
1005 case OVS_KEY_ATTR_UNSPEC:
1006 case __OVS_KEY_ATTR_MAX:
1008 format_generic_odp_key(a, ds);
1013 /* Appends to 'ds' a string representation of the 'key_len' bytes of
1014 * OVS_KEY_ATTR_* attributes in 'key'. */
1016 odp_flow_key_format(const struct nlattr *key, size_t key_len, struct ds *ds)
1019 const struct nlattr *a;
1022 NL_ATTR_FOR_EACH (a, left, key, key_len) {
1024 ds_put_char(ds, ',');
1026 format_odp_key_attr(a, ds);
1031 if (left == key_len) {
1032 ds_put_cstr(ds, "<empty>");
1034 ds_put_format(ds, ",***%u leftover bytes*** (", left);
1035 for (i = 0; i < left; i++) {
1036 ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
1038 ds_put_char(ds, ')');
1041 ds_put_cstr(ds, "<empty>");
1046 put_nd_key(int n, const char *nd_target_s,
1047 const uint8_t *nd_sll, const uint8_t *nd_tll, struct ofpbuf *key)
1049 struct ovs_key_nd nd_key;
1051 memset(&nd_key, 0, sizeof nd_key);
1052 if (inet_pton(AF_INET6, nd_target_s, nd_key.nd_target) != 1) {
1056 memcpy(nd_key.nd_sll, nd_sll, ETH_ADDR_LEN);
1059 memcpy(nd_key.nd_tll, nd_tll, ETH_ADDR_LEN);
1061 nl_msg_put_unspec(key, OVS_KEY_ATTR_ND, &nd_key, sizeof nd_key);
1066 ovs_frag_type_from_string(const char *s, enum ovs_frag_type *type)
1068 if (!strcasecmp(s, "no")) {
1069 *type = OVS_FRAG_TYPE_NONE;
1070 } else if (!strcasecmp(s, "first")) {
1071 *type = OVS_FRAG_TYPE_FIRST;
1072 } else if (!strcasecmp(s, "later")) {
1073 *type = OVS_FRAG_TYPE_LATER;
1081 mpls_lse_from_components(int mpls_label, int mpls_tc, int mpls_ttl, int mpls_bos)
1083 return (htonl((mpls_label << MPLS_LABEL_SHIFT) |
1084 (mpls_tc << MPLS_TC_SHIFT) |
1085 (mpls_ttl << MPLS_TTL_SHIFT) |
1086 (mpls_bos << MPLS_BOS_SHIFT)));
1090 parse_odp_key_attr(const char *s, const struct simap *port_names,
1093 /* Many of the sscanf calls in this function use oversized destination
1094 * fields because some sscanf() implementations truncate the range of %i
1095 * directives, so that e.g. "%"SCNi16 interprets input of "0xfedc" as a
1096 * value of 0x7fff. The other alternatives are to allow only a single
1097 * radix (e.g. decimal or hexadecimal) or to write more sophisticated
1100 * The tun_id parser has to use an alternative approach because there is no
1101 * type larger than 64 bits. */
1104 unsigned long long int priority;
1107 if (sscanf(s, "skb_priority(%llx)%n", &priority, &n) > 0 && n > 0) {
1108 nl_msg_put_u32(key, OVS_KEY_ATTR_PRIORITY, priority);
1114 unsigned long long int mark;
1117 if (sscanf(s, "skb_mark(%llx)%n", &mark, &n) > 0 && n > 0) {
1118 nl_msg_put_u32(key, OVS_KEY_ATTR_SKB_MARK, mark);
1127 if (sscanf(s, "tun_id(%31[x0123456789abcdefABCDEF])%n",
1128 tun_id_s, &n) > 0 && n > 0) {
1129 uint64_t tun_id = strtoull(tun_id_s, NULL, 0);
1130 nl_msg_put_be64(key, OVS_KEY_ATTR_TUN_ID, htonll(tun_id));
1138 struct flow_tnl tun_key;
1141 if (sscanf(s, "tunnel(tun_id=%31[x0123456789abcdefABCDEF],"
1142 "src="IP_SCAN_FMT",dst="IP_SCAN_FMT
1143 ",tos=%i,ttl=%i,flags%n", tun_id_s,
1144 IP_SCAN_ARGS(&tun_key.ip_src),
1145 IP_SCAN_ARGS(&tun_key.ip_dst), &tos, &ttl,
1150 tun_key.tun_id = htonll(strtoull(tun_id_s, NULL, 0));
1151 tun_key.ip_tos = tos;
1152 tun_key.ip_ttl = ttl;
1153 res = parse_flags(&s[n], flow_tun_flag_to_string, &flags);
1154 tun_key.flags = (uint16_t) flags;
1164 tun_key_to_attr(key, &tun_key);
1170 unsigned long long int in_port;
1173 if (sscanf(s, "in_port(%lli)%n", &in_port, &n) > 0 && n > 0) {
1174 nl_msg_put_u32(key, OVS_KEY_ATTR_IN_PORT, in_port);
1179 if (port_names && !strncmp(s, "in_port(", 8)) {
1181 const struct simap_node *node;
1185 name_len = strcspn(s, ")");
1186 node = simap_find_len(port_names, name, name_len);
1188 nl_msg_put_u32(key, OVS_KEY_ATTR_IN_PORT, node->data);
1189 return 8 + name_len + 1;
1194 struct ovs_key_ethernet eth_key;
1198 "eth(src="ETH_ADDR_SCAN_FMT",dst="ETH_ADDR_SCAN_FMT")%n",
1199 ETH_ADDR_SCAN_ARGS(eth_key.eth_src),
1200 ETH_ADDR_SCAN_ARGS(eth_key.eth_dst), &n) > 0 && n > 0) {
1201 nl_msg_put_unspec(key, OVS_KEY_ATTR_ETHERNET,
1202 ð_key, sizeof eth_key);
1213 if ((sscanf(s, "vlan(vid=%"SCNi16",pcp=%i)%n", &vid, &pcp, &n) > 0
1215 nl_msg_put_be16(key, OVS_KEY_ATTR_VLAN,
1216 htons((vid << VLAN_VID_SHIFT) |
1217 (pcp << VLAN_PCP_SHIFT) |
1220 } else if ((sscanf(s, "vlan(vid=%"SCNi16",pcp=%i,cfi=%i)%n",
1221 &vid, &pcp, &cfi, &n) > 0
1223 nl_msg_put_be16(key, OVS_KEY_ATTR_VLAN,
1224 htons((vid << VLAN_VID_SHIFT) |
1225 (pcp << VLAN_PCP_SHIFT) |
1226 (cfi ? VLAN_CFI : 0)));
1235 if (sscanf(s, "eth_type(%i)%n", ð_type, &n) > 0 && n > 0) {
1236 nl_msg_put_be16(key, OVS_KEY_ATTR_ETHERTYPE, htons(eth_type));
1242 int label, tc, ttl, bos;
1245 if (sscanf(s, "mpls(label=%"SCNi32",tc=%i,ttl=%i,bos=%i)%n",
1246 &label, &tc, &ttl, &bos, &n) > 0 &&
1248 struct ovs_key_mpls *mpls;
1250 mpls = nl_msg_put_unspec_uninit(key, OVS_KEY_ATTR_MPLS,
1252 mpls->mpls_top_lse = mpls_lse_from_components(label, tc, ttl, bos);
1264 enum ovs_frag_type ipv4_frag;
1267 if (sscanf(s, "ipv4(src="IP_SCAN_FMT",dst="IP_SCAN_FMT","
1268 "proto=%i,tos=%i,ttl=%i,frag=%7[a-z])%n",
1269 IP_SCAN_ARGS(&ipv4_src), IP_SCAN_ARGS(&ipv4_dst),
1270 &ipv4_proto, &ipv4_tos, &ipv4_ttl, frag, &n) > 0
1272 && ovs_frag_type_from_string(frag, &ipv4_frag)) {
1273 struct ovs_key_ipv4 ipv4_key;
1275 ipv4_key.ipv4_src = ipv4_src;
1276 ipv4_key.ipv4_dst = ipv4_dst;
1277 ipv4_key.ipv4_proto = ipv4_proto;
1278 ipv4_key.ipv4_tos = ipv4_tos;
1279 ipv4_key.ipv4_ttl = ipv4_ttl;
1280 ipv4_key.ipv4_frag = ipv4_frag;
1281 nl_msg_put_unspec(key, OVS_KEY_ATTR_IPV4,
1282 &ipv4_key, sizeof ipv4_key);
1288 char ipv6_src_s[IPV6_SCAN_LEN + 1];
1289 char ipv6_dst_s[IPV6_SCAN_LEN + 1];
1295 enum ovs_frag_type ipv6_frag;
1298 if (sscanf(s, "ipv6(src="IPV6_SCAN_FMT",dst="IPV6_SCAN_FMT","
1299 "label=%i,proto=%i,tclass=%i,hlimit=%i,frag=%7[a-z])%n",
1300 ipv6_src_s, ipv6_dst_s, &ipv6_label,
1301 &ipv6_proto, &ipv6_tclass, &ipv6_hlimit, frag, &n) > 0
1303 && ovs_frag_type_from_string(frag, &ipv6_frag)) {
1304 struct ovs_key_ipv6 ipv6_key;
1306 if (inet_pton(AF_INET6, ipv6_src_s, &ipv6_key.ipv6_src) != 1 ||
1307 inet_pton(AF_INET6, ipv6_dst_s, &ipv6_key.ipv6_dst) != 1) {
1310 ipv6_key.ipv6_label = htonl(ipv6_label);
1311 ipv6_key.ipv6_proto = ipv6_proto;
1312 ipv6_key.ipv6_tclass = ipv6_tclass;
1313 ipv6_key.ipv6_hlimit = ipv6_hlimit;
1314 ipv6_key.ipv6_frag = ipv6_frag;
1315 nl_msg_put_unspec(key, OVS_KEY_ATTR_IPV6,
1316 &ipv6_key, sizeof ipv6_key);
1326 if (sscanf(s, "tcp(src=%i,dst=%i)%n",&tcp_src, &tcp_dst, &n) > 0
1328 struct ovs_key_tcp tcp_key;
1330 tcp_key.tcp_src = htons(tcp_src);
1331 tcp_key.tcp_dst = htons(tcp_dst);
1332 nl_msg_put_unspec(key, OVS_KEY_ATTR_TCP, &tcp_key, sizeof tcp_key);
1342 if (sscanf(s, "udp(src=%i,dst=%i)%n", &udp_src, &udp_dst, &n) > 0
1344 struct ovs_key_udp udp_key;
1346 udp_key.udp_src = htons(udp_src);
1347 udp_key.udp_dst = htons(udp_dst);
1348 nl_msg_put_unspec(key, OVS_KEY_ATTR_UDP, &udp_key, sizeof udp_key);
1358 if (sscanf(s, "icmp(type=%i,code=%i)%n",
1359 &icmp_type, &icmp_code, &n) > 0
1361 struct ovs_key_icmp icmp_key;
1363 icmp_key.icmp_type = icmp_type;
1364 icmp_key.icmp_code = icmp_code;
1365 nl_msg_put_unspec(key, OVS_KEY_ATTR_ICMP,
1366 &icmp_key, sizeof icmp_key);
1372 struct ovs_key_icmpv6 icmpv6_key;
1375 if (sscanf(s, "icmpv6(type=%"SCNi8",code=%"SCNi8")%n",
1376 &icmpv6_key.icmpv6_type, &icmpv6_key.icmpv6_code,&n) > 0
1378 nl_msg_put_unspec(key, OVS_KEY_ATTR_ICMPV6,
1379 &icmpv6_key, sizeof icmpv6_key);
1388 uint8_t arp_sha[ETH_ADDR_LEN];
1389 uint8_t arp_tha[ETH_ADDR_LEN];
1392 if (sscanf(s, "arp(sip="IP_SCAN_FMT",tip="IP_SCAN_FMT","
1393 "op=%i,sha="ETH_ADDR_SCAN_FMT",tha="ETH_ADDR_SCAN_FMT")%n",
1394 IP_SCAN_ARGS(&arp_sip),
1395 IP_SCAN_ARGS(&arp_tip),
1397 ETH_ADDR_SCAN_ARGS(arp_sha),
1398 ETH_ADDR_SCAN_ARGS(arp_tha), &n) > 0 && n > 0) {
1399 struct ovs_key_arp arp_key;
1401 memset(&arp_key, 0, sizeof arp_key);
1402 arp_key.arp_sip = arp_sip;
1403 arp_key.arp_tip = arp_tip;
1404 arp_key.arp_op = htons(arp_op);
1405 memcpy(arp_key.arp_sha, arp_sha, ETH_ADDR_LEN);
1406 memcpy(arp_key.arp_tha, arp_tha, ETH_ADDR_LEN);
1407 nl_msg_put_unspec(key, OVS_KEY_ATTR_ARP, &arp_key, sizeof arp_key);
1413 char nd_target_s[IPV6_SCAN_LEN + 1];
1414 uint8_t nd_sll[ETH_ADDR_LEN];
1415 uint8_t nd_tll[ETH_ADDR_LEN];
1418 if (sscanf(s, "nd(target="IPV6_SCAN_FMT")%n",
1419 nd_target_s, &n) > 0 && n > 0) {
1420 return put_nd_key(n, nd_target_s, NULL, NULL, key);
1422 if (sscanf(s, "nd(target="IPV6_SCAN_FMT",sll="ETH_ADDR_SCAN_FMT")%n",
1423 nd_target_s, ETH_ADDR_SCAN_ARGS(nd_sll), &n) > 0
1425 return put_nd_key(n, nd_target_s, nd_sll, NULL, key);
1427 if (sscanf(s, "nd(target="IPV6_SCAN_FMT",tll="ETH_ADDR_SCAN_FMT")%n",
1428 nd_target_s, ETH_ADDR_SCAN_ARGS(nd_tll), &n) > 0
1430 return put_nd_key(n, nd_target_s, NULL, nd_tll, key);
1432 if (sscanf(s, "nd(target="IPV6_SCAN_FMT",sll="ETH_ADDR_SCAN_FMT","
1433 "tll="ETH_ADDR_SCAN_FMT")%n",
1434 nd_target_s, ETH_ADDR_SCAN_ARGS(nd_sll),
1435 ETH_ADDR_SCAN_ARGS(nd_tll), &n) > 0
1437 return put_nd_key(n, nd_target_s, nd_sll, nd_tll, key);
1441 if (!strncmp(s, "encap(", 6)) {
1442 const char *start = s;
1445 encap = nl_msg_start_nested(key, OVS_KEY_ATTR_ENCAP);
1451 s += strspn(s, ", \t\r\n");
1454 } else if (*s == ')') {
1458 retval = parse_odp_key_attr(s, port_names, key);
1466 nl_msg_end_nested(key, encap);
1474 /* Parses the string representation of a datapath flow key, in the
1475 * format output by odp_flow_key_format(). Returns 0 if successful,
1476 * otherwise a positive errno value. On success, the flow key is
1477 * appended to 'key' as a series of Netlink attributes. On failure, no
1478 * data is appended to 'key'. Either way, 'key''s data might be
1481 * If 'port_names' is nonnull, it points to an simap that maps from a port name
1482 * to a port number. (Port names may be used instead of port numbers in
1485 * On success, the attributes appended to 'key' are individually syntactically
1486 * valid, but they may not be valid as a sequence. 'key' might, for example,
1487 * have duplicated keys. odp_flow_key_to_flow() will detect those errors. */
1489 odp_flow_key_from_string(const char *s, const struct simap *port_names,
1492 const size_t old_size = key->size;
1496 s += strspn(s, delimiters);
1501 retval = parse_odp_key_attr(s, port_names, key);
1503 key->size = old_size;
1513 ovs_to_odp_frag(uint8_t nw_frag)
1515 return (nw_frag == 0 ? OVS_FRAG_TYPE_NONE
1516 : nw_frag == FLOW_NW_FRAG_ANY ? OVS_FRAG_TYPE_FIRST
1517 : OVS_FRAG_TYPE_LATER);
1520 /* Appends a representation of 'flow' as OVS_KEY_ATTR_* attributes to 'buf'.
1521 * 'flow->in_port' is ignored (since it is likely to be an OpenFlow port
1522 * number rather than a datapath port number). Instead, if 'odp_in_port'
1523 * is anything other than OVSP_NONE, it is included in 'buf' as the input
1526 * 'buf' must have at least ODPUTIL_FLOW_KEY_BYTES bytes of space, or be
1527 * capable of being expanded to allow for that much space. */
1529 odp_flow_key_from_flow(struct ofpbuf *buf, const struct flow *flow,
1530 uint32_t odp_in_port)
1532 struct ovs_key_ethernet *eth_key;
1535 if (flow->skb_priority) {
1536 nl_msg_put_u32(buf, OVS_KEY_ATTR_PRIORITY, flow->skb_priority);
1539 if (flow->tunnel.ip_dst) {
1540 tun_key_to_attr(buf, &flow->tunnel);
1541 } else if (flow->tunnel.tun_id != htonll(0)) {
1542 nl_msg_put_be64(buf, OVS_KEY_ATTR_TUN_ID, flow->tunnel.tun_id);
1545 if (flow->skb_mark) {
1546 nl_msg_put_u32(buf, OVS_KEY_ATTR_SKB_MARK, flow->skb_mark);
1549 if (odp_in_port != OVSP_NONE) {
1550 nl_msg_put_u32(buf, OVS_KEY_ATTR_IN_PORT, odp_in_port);
1553 eth_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ETHERNET,
1555 memcpy(eth_key->eth_src, flow->dl_src, ETH_ADDR_LEN);
1556 memcpy(eth_key->eth_dst, flow->dl_dst, ETH_ADDR_LEN);
1558 if (flow->vlan_tci != htons(0) || flow->dl_type == htons(ETH_TYPE_VLAN)) {
1559 nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, htons(ETH_TYPE_VLAN));
1560 nl_msg_put_be16(buf, OVS_KEY_ATTR_VLAN, flow->vlan_tci);
1561 encap = nl_msg_start_nested(buf, OVS_KEY_ATTR_ENCAP);
1562 if (flow->vlan_tci == htons(0)) {
1569 if (ntohs(flow->dl_type) < ETH_TYPE_MIN) {
1573 nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, flow->dl_type);
1575 if (flow->dl_type == htons(ETH_TYPE_IP)) {
1576 struct ovs_key_ipv4 *ipv4_key;
1578 ipv4_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_IPV4,
1580 ipv4_key->ipv4_src = flow->nw_src;
1581 ipv4_key->ipv4_dst = flow->nw_dst;
1582 ipv4_key->ipv4_proto = flow->nw_proto;
1583 ipv4_key->ipv4_tos = flow->nw_tos;
1584 ipv4_key->ipv4_ttl = flow->nw_ttl;
1585 ipv4_key->ipv4_frag = ovs_to_odp_frag(flow->nw_frag);
1586 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1587 struct ovs_key_ipv6 *ipv6_key;
1589 ipv6_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_IPV6,
1591 memcpy(ipv6_key->ipv6_src, &flow->ipv6_src, sizeof ipv6_key->ipv6_src);
1592 memcpy(ipv6_key->ipv6_dst, &flow->ipv6_dst, sizeof ipv6_key->ipv6_dst);
1593 ipv6_key->ipv6_label = flow->ipv6_label;
1594 ipv6_key->ipv6_proto = flow->nw_proto;
1595 ipv6_key->ipv6_tclass = flow->nw_tos;
1596 ipv6_key->ipv6_hlimit = flow->nw_ttl;
1597 ipv6_key->ipv6_frag = ovs_to_odp_frag(flow->nw_frag);
1598 } else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
1599 flow->dl_type == htons(ETH_TYPE_RARP)) {
1600 struct ovs_key_arp *arp_key;
1602 arp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ARP,
1604 memset(arp_key, 0, sizeof *arp_key);
1605 arp_key->arp_sip = flow->nw_src;
1606 arp_key->arp_tip = flow->nw_dst;
1607 arp_key->arp_op = htons(flow->nw_proto);
1608 memcpy(arp_key->arp_sha, flow->arp_sha, ETH_ADDR_LEN);
1609 memcpy(arp_key->arp_tha, flow->arp_tha, ETH_ADDR_LEN);
1612 if (flow->mpls_depth) {
1613 struct ovs_key_mpls *mpls_key;
1615 mpls_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_MPLS,
1617 mpls_key->mpls_top_lse = flow->mpls_lse;
1620 if (is_ip_any(flow) && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1621 if (flow->nw_proto == IPPROTO_TCP) {
1622 struct ovs_key_tcp *tcp_key;
1624 tcp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_TCP,
1626 tcp_key->tcp_src = flow->tp_src;
1627 tcp_key->tcp_dst = flow->tp_dst;
1628 } else if (flow->nw_proto == IPPROTO_UDP) {
1629 struct ovs_key_udp *udp_key;
1631 udp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_UDP,
1633 udp_key->udp_src = flow->tp_src;
1634 udp_key->udp_dst = flow->tp_dst;
1635 } else if (flow->dl_type == htons(ETH_TYPE_IP)
1636 && flow->nw_proto == IPPROTO_ICMP) {
1637 struct ovs_key_icmp *icmp_key;
1639 icmp_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ICMP,
1641 icmp_key->icmp_type = ntohs(flow->tp_src);
1642 icmp_key->icmp_code = ntohs(flow->tp_dst);
1643 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)
1644 && flow->nw_proto == IPPROTO_ICMPV6) {
1645 struct ovs_key_icmpv6 *icmpv6_key;
1647 icmpv6_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ICMPV6,
1648 sizeof *icmpv6_key);
1649 icmpv6_key->icmpv6_type = ntohs(flow->tp_src);
1650 icmpv6_key->icmpv6_code = ntohs(flow->tp_dst);
1652 if (icmpv6_key->icmpv6_type == ND_NEIGHBOR_SOLICIT
1653 || icmpv6_key->icmpv6_type == ND_NEIGHBOR_ADVERT) {
1654 struct ovs_key_nd *nd_key;
1656 nd_key = nl_msg_put_unspec_uninit(buf, OVS_KEY_ATTR_ND,
1658 memcpy(nd_key->nd_target, &flow->nd_target,
1659 sizeof nd_key->nd_target);
1660 memcpy(nd_key->nd_sll, flow->arp_sha, ETH_ADDR_LEN);
1661 memcpy(nd_key->nd_tll, flow->arp_tha, ETH_ADDR_LEN);
1668 nl_msg_end_nested(buf, encap);
1673 odp_flow_key_hash(const struct nlattr *key, size_t key_len)
1675 BUILD_ASSERT_DECL(!(NLA_ALIGNTO % sizeof(uint32_t)));
1676 return hash_words((const uint32_t *) key, key_len / sizeof(uint32_t), 0);
1680 log_odp_key_attributes(struct vlog_rate_limit *rl, const char *title,
1681 uint64_t attrs, int out_of_range_attr,
1682 const struct nlattr *key, size_t key_len)
1687 if (VLOG_DROP_DBG(rl)) {
1692 for (i = 0; i < 64; i++) {
1693 if (attrs & (UINT64_C(1) << i)) {
1694 ds_put_format(&s, " %s", ovs_key_attr_to_string(i));
1697 if (out_of_range_attr) {
1698 ds_put_format(&s, " %d (and possibly others)", out_of_range_attr);
1701 ds_put_cstr(&s, ": ");
1702 odp_flow_key_format(key, key_len, &s);
1704 VLOG_DBG("%s:%s", title, ds_cstr(&s));
1709 odp_to_ovs_frag(uint8_t odp_frag, struct flow *flow)
1711 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1713 if (odp_frag > OVS_FRAG_TYPE_LATER) {
1714 VLOG_ERR_RL(&rl, "invalid frag %"PRIu8" in flow key", odp_frag);
1718 if (odp_frag != OVS_FRAG_TYPE_NONE) {
1719 flow->nw_frag |= FLOW_NW_FRAG_ANY;
1720 if (odp_frag == OVS_FRAG_TYPE_LATER) {
1721 flow->nw_frag |= FLOW_NW_FRAG_LATER;
1728 parse_flow_nlattrs(const struct nlattr *key, size_t key_len,
1729 const struct nlattr *attrs[], uint64_t *present_attrsp,
1730 int *out_of_range_attrp)
1732 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
1733 const struct nlattr *nla;
1734 uint64_t present_attrs;
1738 *out_of_range_attrp = 0;
1739 NL_ATTR_FOR_EACH (nla, left, key, key_len) {
1740 uint16_t type = nl_attr_type(nla);
1741 size_t len = nl_attr_get_size(nla);
1742 int expected_len = odp_flow_key_attr_len(type);
1744 if (len != expected_len && expected_len >= 0) {
1745 VLOG_ERR_RL(&rl, "attribute %s has length %zu but should have "
1746 "length %d", ovs_key_attr_to_string(type),
1751 if (type >= CHAR_BIT * sizeof present_attrs) {
1752 *out_of_range_attrp = type;
1754 if (present_attrs & (UINT64_C(1) << type)) {
1755 VLOG_ERR_RL(&rl, "duplicate %s attribute in flow key",
1756 ovs_key_attr_to_string(type));
1760 present_attrs |= UINT64_C(1) << type;
1765 VLOG_ERR_RL(&rl, "trailing garbage in flow key");
1769 *present_attrsp = present_attrs;
1773 static enum odp_key_fitness
1774 check_expectations(uint64_t present_attrs, int out_of_range_attr,
1775 uint64_t expected_attrs,
1776 const struct nlattr *key, size_t key_len)
1778 uint64_t missing_attrs;
1779 uint64_t extra_attrs;
1781 missing_attrs = expected_attrs & ~present_attrs;
1782 if (missing_attrs) {
1783 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
1784 log_odp_key_attributes(&rl, "expected but not present",
1785 missing_attrs, 0, key, key_len);
1786 return ODP_FIT_TOO_LITTLE;
1789 extra_attrs = present_attrs & ~expected_attrs;
1790 if (extra_attrs || out_of_range_attr) {
1791 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
1792 log_odp_key_attributes(&rl, "present but not expected",
1793 extra_attrs, out_of_range_attr, key, key_len);
1794 return ODP_FIT_TOO_MUCH;
1797 return ODP_FIT_PERFECT;
1801 parse_ethertype(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
1802 uint64_t present_attrs, uint64_t *expected_attrs,
1805 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1807 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE)) {
1808 flow->dl_type = nl_attr_get_be16(attrs[OVS_KEY_ATTR_ETHERTYPE]);
1809 if (ntohs(flow->dl_type) < 1536) {
1810 VLOG_ERR_RL(&rl, "invalid Ethertype %"PRIu16" in flow key",
1811 ntohs(flow->dl_type));
1814 *expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERTYPE;
1816 flow->dl_type = htons(FLOW_DL_TYPE_NONE);
1821 static enum odp_key_fitness
1822 parse_l2_5_onward(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
1823 uint64_t present_attrs, int out_of_range_attr,
1824 uint64_t expected_attrs, struct flow *flow,
1825 const struct nlattr *key, size_t key_len)
1827 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1830 /* Parse MPLS label stack entry */
1831 if (eth_type_mpls(flow->dl_type)) {
1832 /* Calculate fitness of outer attributes. */
1833 expected_attrs |= (UINT64_C(1) << OVS_KEY_ATTR_MPLS);
1835 /* Get the MPLS LSE value. */
1836 if (!(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_MPLS))) {
1837 return ODP_FIT_TOO_LITTLE;
1839 flow->mpls_lse = nl_attr_get_be32(attrs[OVS_KEY_ATTR_MPLS]);
1842 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV4)) {
1843 flow->encap_dl_type = htons(ETH_TYPE_IP);
1844 } else if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV6)) {
1845 flow->encap_dl_type = htons(ETH_TYPE_IPV6);
1846 } else if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ARP)) {
1847 flow->encap_dl_type = htons(ETH_TYPE_ARP);
1851 dl_type = flow_innermost_dl_type(flow);
1853 if (dl_type == htons(ETH_TYPE_IP)) {
1854 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV4;
1855 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV4)) {
1856 const struct ovs_key_ipv4 *ipv4_key;
1858 ipv4_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV4]);
1859 flow->nw_src = ipv4_key->ipv4_src;
1860 flow->nw_dst = ipv4_key->ipv4_dst;
1861 flow->nw_proto = ipv4_key->ipv4_proto;
1862 flow->nw_tos = ipv4_key->ipv4_tos;
1863 flow->nw_ttl = ipv4_key->ipv4_ttl;
1864 if (!odp_to_ovs_frag(ipv4_key->ipv4_frag, flow)) {
1865 return ODP_FIT_ERROR;
1868 } else if (dl_type == htons(ETH_TYPE_IPV6)) {
1869 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IPV6;
1870 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IPV6)) {
1871 const struct ovs_key_ipv6 *ipv6_key;
1873 ipv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_IPV6]);
1874 memcpy(&flow->ipv6_src, ipv6_key->ipv6_src, sizeof flow->ipv6_src);
1875 memcpy(&flow->ipv6_dst, ipv6_key->ipv6_dst, sizeof flow->ipv6_dst);
1876 flow->ipv6_label = ipv6_key->ipv6_label;
1877 flow->nw_proto = ipv6_key->ipv6_proto;
1878 flow->nw_tos = ipv6_key->ipv6_tclass;
1879 flow->nw_ttl = ipv6_key->ipv6_hlimit;
1880 if (!odp_to_ovs_frag(ipv6_key->ipv6_frag, flow)) {
1881 return ODP_FIT_ERROR;
1884 } else if (dl_type == htons(ETH_TYPE_ARP) ||
1885 dl_type == htons(ETH_TYPE_RARP)) {
1886 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ARP;
1887 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ARP)) {
1888 const struct ovs_key_arp *arp_key;
1890 arp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ARP]);
1891 flow->nw_src = arp_key->arp_sip;
1892 flow->nw_dst = arp_key->arp_tip;
1893 if (arp_key->arp_op & htons(0xff00)) {
1894 VLOG_ERR_RL(&rl, "unsupported ARP opcode %"PRIu16" in flow "
1895 "key", ntohs(arp_key->arp_op));
1896 return ODP_FIT_ERROR;
1898 flow->nw_proto = ntohs(arp_key->arp_op);
1899 memcpy(flow->arp_sha, arp_key->arp_sha, ETH_ADDR_LEN);
1900 memcpy(flow->arp_tha, arp_key->arp_tha, ETH_ADDR_LEN);
1904 if (flow->nw_proto == IPPROTO_TCP
1905 && (dl_type == htons(ETH_TYPE_IP) ||
1906 dl_type == htons(ETH_TYPE_IPV6))
1907 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1908 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TCP;
1909 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TCP)) {
1910 const struct ovs_key_tcp *tcp_key;
1912 tcp_key = nl_attr_get(attrs[OVS_KEY_ATTR_TCP]);
1913 flow->tp_src = tcp_key->tcp_src;
1914 flow->tp_dst = tcp_key->tcp_dst;
1916 } else if (flow->nw_proto == IPPROTO_UDP
1917 && (dl_type == htons(ETH_TYPE_IP) ||
1918 dl_type == htons(ETH_TYPE_IPV6))
1919 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1920 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_UDP;
1921 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_UDP)) {
1922 const struct ovs_key_udp *udp_key;
1924 udp_key = nl_attr_get(attrs[OVS_KEY_ATTR_UDP]);
1925 flow->tp_src = udp_key->udp_src;
1926 flow->tp_dst = udp_key->udp_dst;
1928 } else if (flow->nw_proto == IPPROTO_ICMP
1929 && dl_type == htons(ETH_TYPE_IP)
1930 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1931 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMP;
1932 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ICMP)) {
1933 const struct ovs_key_icmp *icmp_key;
1935 icmp_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMP]);
1936 flow->tp_src = htons(icmp_key->icmp_type);
1937 flow->tp_dst = htons(icmp_key->icmp_code);
1939 } else if (flow->nw_proto == IPPROTO_ICMPV6
1940 && dl_type == htons(ETH_TYPE_IPV6)
1941 && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1942 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ICMPV6;
1943 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ICMPV6)) {
1944 const struct ovs_key_icmpv6 *icmpv6_key;
1946 icmpv6_key = nl_attr_get(attrs[OVS_KEY_ATTR_ICMPV6]);
1947 flow->tp_src = htons(icmpv6_key->icmpv6_type);
1948 flow->tp_dst = htons(icmpv6_key->icmpv6_code);
1950 if (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
1951 flow->tp_src == htons(ND_NEIGHBOR_ADVERT)) {
1952 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ND;
1953 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ND)) {
1954 const struct ovs_key_nd *nd_key;
1956 nd_key = nl_attr_get(attrs[OVS_KEY_ATTR_ND]);
1957 memcpy(&flow->nd_target, nd_key->nd_target,
1958 sizeof flow->nd_target);
1959 memcpy(flow->arp_sha, nd_key->nd_sll, ETH_ADDR_LEN);
1960 memcpy(flow->arp_tha, nd_key->nd_tll, ETH_ADDR_LEN);
1966 return check_expectations(present_attrs, out_of_range_attr, expected_attrs,
1970 /* Parse 802.1Q header then encapsulated L3 attributes. */
1971 static enum odp_key_fitness
1972 parse_8021q_onward(const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1],
1973 uint64_t present_attrs, int out_of_range_attr,
1974 uint64_t expected_attrs, struct flow *flow,
1975 const struct nlattr *key, size_t key_len)
1977 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1979 const struct nlattr *encap
1980 = (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ENCAP)
1981 ? attrs[OVS_KEY_ATTR_ENCAP] : NULL);
1982 enum odp_key_fitness encap_fitness;
1983 enum odp_key_fitness fitness;
1986 /* Calulate fitness of outer attributes. */
1987 expected_attrs |= ((UINT64_C(1) << OVS_KEY_ATTR_VLAN) |
1988 (UINT64_C(1) << OVS_KEY_ATTR_ENCAP));
1989 fitness = check_expectations(present_attrs, out_of_range_attr,
1990 expected_attrs, key, key_len);
1992 /* Get the VLAN TCI value. */
1993 if (!(present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_VLAN))) {
1994 return ODP_FIT_TOO_LITTLE;
1996 tci = nl_attr_get_be16(attrs[OVS_KEY_ATTR_VLAN]);
1997 if (tci == htons(0)) {
1998 /* Corner case for a truncated 802.1Q header. */
1999 if (fitness == ODP_FIT_PERFECT && nl_attr_get_size(encap)) {
2000 return ODP_FIT_TOO_MUCH;
2003 } else if (!(tci & htons(VLAN_CFI))) {
2004 VLOG_ERR_RL(&rl, "OVS_KEY_ATTR_VLAN 0x%04"PRIx16" is nonzero "
2005 "but CFI bit is not set", ntohs(tci));
2006 return ODP_FIT_ERROR;
2010 * Remove the TPID from dl_type since it's not the real Ethertype. */
2011 flow->vlan_tci = tci;
2012 flow->dl_type = htons(0);
2014 /* Now parse the encapsulated attributes. */
2015 if (!parse_flow_nlattrs(nl_attr_get(encap), nl_attr_get_size(encap),
2016 attrs, &present_attrs, &out_of_range_attr)) {
2017 return ODP_FIT_ERROR;
2021 if (!parse_ethertype(attrs, present_attrs, &expected_attrs, flow)) {
2022 return ODP_FIT_ERROR;
2024 encap_fitness = parse_l2_5_onward(attrs, present_attrs, out_of_range_attr,
2025 expected_attrs, flow, key, key_len);
2027 /* The overall fitness is the worse of the outer and inner attributes. */
2028 return MAX(fitness, encap_fitness);
2031 /* Converts the 'key_len' bytes of OVS_KEY_ATTR_* attributes in 'key' to a flow
2032 * structure in 'flow'. Returns an ODP_FIT_* value that indicates how well
2033 * 'key' fits our expectations for what a flow key should contain.
2035 * The 'in_port' will be the datapath's understanding of the port. The
2036 * caller will need to translate with odp_port_to_ofp_port() if the
2037 * OpenFlow port is needed.
2039 * This function doesn't take the packet itself as an argument because none of
2040 * the currently understood OVS_KEY_ATTR_* attributes require it. Currently,
2041 * it is always possible to infer which additional attribute(s) should appear
2042 * by looking at the attributes for lower-level protocols, e.g. if the network
2043 * protocol in OVS_KEY_ATTR_IPV4 or OVS_KEY_ATTR_IPV6 is IPPROTO_TCP then we
2044 * know that a OVS_KEY_ATTR_TCP attribute must appear and that otherwise it
2045 * must be absent. */
2046 enum odp_key_fitness
2047 odp_flow_key_to_flow(const struct nlattr *key, size_t key_len,
2050 const struct nlattr *attrs[OVS_KEY_ATTR_MAX + 1];
2051 uint64_t expected_attrs;
2052 uint64_t present_attrs;
2053 int out_of_range_attr;
2055 memset(flow, 0, sizeof *flow);
2057 /* Parse attributes. */
2058 if (!parse_flow_nlattrs(key, key_len, attrs, &present_attrs,
2059 &out_of_range_attr)) {
2060 return ODP_FIT_ERROR;
2065 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_PRIORITY)) {
2066 flow->skb_priority = nl_attr_get_u32(attrs[OVS_KEY_ATTR_PRIORITY]);
2067 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_PRIORITY;
2070 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_SKB_MARK)) {
2071 flow->skb_mark = nl_attr_get_u32(attrs[OVS_KEY_ATTR_SKB_MARK]);
2072 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_SKB_MARK;
2075 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TUN_ID)) {
2076 flow->tunnel.tun_id = nl_attr_get_be64(attrs[OVS_KEY_ATTR_TUN_ID]);
2077 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TUN_ID;
2080 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_TUNNEL)) {
2081 enum odp_key_fitness res;
2083 res = tun_key_from_attr(attrs[OVS_KEY_ATTR_TUNNEL], &flow->tunnel);
2084 if (res == ODP_FIT_ERROR) {
2085 return ODP_FIT_ERROR;
2086 } else if (res == ODP_FIT_PERFECT) {
2087 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_TUNNEL;
2091 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_IN_PORT)) {
2092 flow->in_port = nl_attr_get_u32(attrs[OVS_KEY_ATTR_IN_PORT]);
2093 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_IN_PORT;
2095 flow->in_port = OVSP_NONE;
2098 /* Ethernet header. */
2099 if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ETHERNET)) {
2100 const struct ovs_key_ethernet *eth_key;
2102 eth_key = nl_attr_get(attrs[OVS_KEY_ATTR_ETHERNET]);
2103 memcpy(flow->dl_src, eth_key->eth_src, ETH_ADDR_LEN);
2104 memcpy(flow->dl_dst, eth_key->eth_dst, ETH_ADDR_LEN);
2106 expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_ETHERNET;
2108 /* Get Ethertype or 802.1Q TPID or FLOW_DL_TYPE_NONE. */
2109 if (!parse_ethertype(attrs, present_attrs, &expected_attrs, flow)) {
2110 return ODP_FIT_ERROR;
2113 if (flow->dl_type == htons(ETH_TYPE_VLAN)) {
2114 return parse_8021q_onward(attrs, present_attrs, out_of_range_attr,
2115 expected_attrs, flow, key, key_len);
2117 return parse_l2_5_onward(attrs, present_attrs, out_of_range_attr,
2118 expected_attrs, flow, key, key_len);
2121 /* Returns 'fitness' as a string, for use in debug messages. */
2123 odp_key_fitness_to_string(enum odp_key_fitness fitness)
2126 case ODP_FIT_PERFECT:
2128 case ODP_FIT_TOO_MUCH:
2130 case ODP_FIT_TOO_LITTLE:
2131 return "too_little";
2139 /* Appends an OVS_ACTION_ATTR_USERSPACE action to 'odp_actions' that specifies
2140 * Netlink PID 'pid'. If 'userdata' is nonnull, adds a userdata attribute
2141 * whose contents are the 'userdata_size' bytes at 'userdata' and returns the
2142 * offset within 'odp_actions' of the start of the cookie. (If 'userdata' is
2143 * null, then the return value is not meaningful.) */
2145 odp_put_userspace_action(uint32_t pid,
2146 const void *userdata, size_t userdata_size,
2147 struct ofpbuf *odp_actions)
2149 size_t userdata_ofs;
2152 offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_USERSPACE);
2153 nl_msg_put_u32(odp_actions, OVS_USERSPACE_ATTR_PID, pid);
2155 userdata_ofs = odp_actions->size + NLA_HDRLEN;
2156 nl_msg_put_unspec(odp_actions, OVS_USERSPACE_ATTR_USERDATA,
2157 userdata, userdata_size);
2161 nl_msg_end_nested(odp_actions, offset);
2163 return userdata_ofs;
2167 odp_put_tunnel_action(const struct flow_tnl *tunnel,
2168 struct ofpbuf *odp_actions)
2170 size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
2171 tun_key_to_attr(odp_actions, tunnel);
2172 nl_msg_end_nested(odp_actions, offset);
2175 /* The commit_odp_actions() function and its helpers. */
2178 commit_set_action(struct ofpbuf *odp_actions, enum ovs_key_attr key_type,
2179 const void *key, size_t key_size)
2181 size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
2182 nl_msg_put_unspec(odp_actions, key_type, key, key_size);
2183 nl_msg_end_nested(odp_actions, offset);
2186 /* If any of the flow key data that ODP actions can modify are different in
2187 * 'base->tunnel' and 'flow->tunnel', appends a set_tunnel ODP action to
2188 * 'odp_actions' that change the flow tunneling information in key from
2189 * 'base->tunnel' into 'flow->tunnel', and then changes 'base->tunnel' in the
2190 * same way. In other words, operates the same as commit_odp_actions(), but
2191 * only on tunneling information. */
2193 commit_odp_tunnel_action(const struct flow *flow, struct flow *base,
2194 struct ofpbuf *odp_actions)
2196 if (!memcmp(&base->tunnel, &flow->tunnel, sizeof base->tunnel)) {
2199 memcpy(&base->tunnel, &flow->tunnel, sizeof base->tunnel);
2201 /* A valid IPV4_TUNNEL must have non-zero ip_dst. */
2202 if (flow->tunnel.ip_dst) {
2203 odp_put_tunnel_action(&base->tunnel, odp_actions);
2205 commit_set_action(odp_actions, OVS_KEY_ATTR_TUN_ID,
2206 &base->tunnel.tun_id, sizeof base->tunnel.tun_id);
2211 commit_set_ether_addr_action(const struct flow *flow, struct flow *base,
2212 struct ofpbuf *odp_actions)
2214 struct ovs_key_ethernet eth_key;
2216 if (eth_addr_equals(base->dl_src, flow->dl_src) &&
2217 eth_addr_equals(base->dl_dst, flow->dl_dst)) {
2221 memcpy(base->dl_src, flow->dl_src, ETH_ADDR_LEN);
2222 memcpy(base->dl_dst, flow->dl_dst, ETH_ADDR_LEN);
2224 memcpy(eth_key.eth_src, base->dl_src, ETH_ADDR_LEN);
2225 memcpy(eth_key.eth_dst, base->dl_dst, ETH_ADDR_LEN);
2227 commit_set_action(odp_actions, OVS_KEY_ATTR_ETHERNET,
2228 ð_key, sizeof(eth_key));
2232 commit_vlan_action(const struct flow *flow, struct flow *base,
2233 struct ofpbuf *odp_actions)
2235 if (base->vlan_tci == flow->vlan_tci) {
2239 if (base->vlan_tci & htons(VLAN_CFI)) {
2240 nl_msg_put_flag(odp_actions, OVS_ACTION_ATTR_POP_VLAN);
2243 if (flow->vlan_tci & htons(VLAN_CFI)) {
2244 struct ovs_action_push_vlan vlan;
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);
2251 base->vlan_tci = flow->vlan_tci;
2255 commit_mpls_action(const struct flow *flow, struct flow *base,
2256 struct ofpbuf *odp_actions)
2258 if (flow->mpls_lse == base->mpls_lse &&
2259 flow->mpls_depth == base->mpls_depth) {
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");
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;
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");
2280 mpls = nl_msg_put_unspec_uninit(odp_actions, OVS_ACTION_ATTR_PUSH_MPLS,
2282 memset(mpls, 0, sizeof *mpls);
2283 mpls->mpls_ethertype = flow->dl_type;
2284 mpls->mpls_lse = flow->mpls_lse;
2286 struct ovs_key_mpls mpls_key;
2288 mpls_key.mpls_top_lse = flow->mpls_lse;
2289 commit_set_action(odp_actions, OVS_KEY_ATTR_MPLS,
2290 &mpls_key, sizeof(mpls_key));
2293 base->dl_type = flow->dl_type;
2294 base->mpls_lse = flow->mpls_lse;
2295 base->mpls_depth = flow->mpls_depth;
2299 commit_set_ipv4_action(const struct flow *flow, struct flow *base,
2300 struct ofpbuf *odp_actions)
2302 struct ovs_key_ipv4 ipv4_key;
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) {
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;
2317 ipv4_key.ipv4_frag = ovs_to_odp_frag(base->nw_frag);
2319 commit_set_action(odp_actions, OVS_KEY_ATTR_IPV4,
2320 &ipv4_key, sizeof(ipv4_key));
2324 commit_set_ipv6_action(const struct flow *flow, struct flow *base,
2325 struct ofpbuf *odp_actions)
2327 struct ovs_key_ipv6 ipv6_key;
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) {
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));
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);
2349 commit_set_action(odp_actions, OVS_KEY_ATTR_IPV6,
2350 &ipv6_key, sizeof(ipv6_key));
2354 commit_set_nw_action(const struct flow *flow, struct flow *base,
2355 struct ofpbuf *odp_actions)
2357 ovs_be16 dl_type = flow_innermost_dl_type(flow);
2359 /* Check if flow really have an IP header. */
2360 if (!flow->nw_proto) {
2364 if (dl_type == htons(ETH_TYPE_IP)) {
2365 commit_set_ipv4_action(flow, base, odp_actions);
2366 } else if (dl_type == htons(ETH_TYPE_IPV6)) {
2367 commit_set_ipv6_action(flow, base, odp_actions);
2372 commit_set_port_action(const struct flow *flow, struct flow *base,
2373 struct ofpbuf *odp_actions)
2375 if (!base->tp_src && !base->tp_dst) {
2379 if (base->tp_src == flow->tp_src &&
2380 base->tp_dst == flow->tp_dst) {
2384 if (flow->nw_proto == IPPROTO_TCP) {
2385 struct ovs_key_tcp port_key;
2387 port_key.tcp_src = base->tp_src = flow->tp_src;
2388 port_key.tcp_dst = base->tp_dst = flow->tp_dst;
2390 commit_set_action(odp_actions, OVS_KEY_ATTR_TCP,
2391 &port_key, sizeof(port_key));
2393 } else if (flow->nw_proto == IPPROTO_UDP) {
2394 struct ovs_key_udp port_key;
2396 port_key.udp_src = base->tp_src = flow->tp_src;
2397 port_key.udp_dst = base->tp_dst = flow->tp_dst;
2399 commit_set_action(odp_actions, OVS_KEY_ATTR_UDP,
2400 &port_key, sizeof(port_key));
2405 commit_set_priority_action(const struct flow *flow, struct flow *base,
2406 struct ofpbuf *odp_actions)
2408 if (base->skb_priority == flow->skb_priority) {
2411 base->skb_priority = flow->skb_priority;
2413 commit_set_action(odp_actions, OVS_KEY_ATTR_PRIORITY,
2414 &base->skb_priority, sizeof(base->skb_priority));
2418 commit_set_skb_mark_action(const struct flow *flow, struct flow *base,
2419 struct ofpbuf *odp_actions)
2421 if (base->skb_mark == flow->skb_mark) {
2424 base->skb_mark = flow->skb_mark;
2426 commit_set_action(odp_actions, OVS_KEY_ATTR_SKB_MARK,
2427 &base->skb_mark, sizeof(base->skb_mark));
2429 /* If any of the flow key data that ODP actions can modify are different in
2430 * 'base' and 'flow', appends ODP actions to 'odp_actions' that change the flow
2431 * key from 'base' into 'flow', and then changes 'base' the same way. Does not
2432 * commit set_tunnel actions. Users should call commit_odp_tunnel_action()
2433 * in addition to this function if needed. */
2435 commit_odp_actions(const struct flow *flow, struct flow *base,
2436 struct ofpbuf *odp_actions)
2438 commit_set_ether_addr_action(flow, base, odp_actions);
2439 commit_vlan_action(flow, base, odp_actions);
2440 commit_mpls_action(flow, base, odp_actions);
2441 commit_set_nw_action(flow, base, odp_actions);
2442 commit_set_port_action(flow, base, odp_actions);
2443 commit_set_priority_action(flow, base, odp_actions);
2444 commit_set_skb_mark_action(flow, base, odp_actions);