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Linux 4.1.16
[linux/fpc-iii.git] / net / openvswitch / flow.c
blob2dacc7b5af23a14b827785fdbc3eaf5bd6a26883
1 /*
2 * Copyright (c) 2007-2014 Nicira, Inc.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
16 * 02110-1301, USA
17 */
18
19 #include <linux/uaccess.h>
20 #include <linux/netdevice.h>
21 #include <linux/etherdevice.h>
22 #include <linux/if_ether.h>
23 #include <linux/if_vlan.h>
24 #include <net/llc_pdu.h>
25 #include <linux/kernel.h>
26 #include <linux/jhash.h>
27 #include <linux/jiffies.h>
28 #include <linux/llc.h>
29 #include <linux/module.h>
30 #include <linux/in.h>
31 #include <linux/rcupdate.h>
32 #include <linux/if_arp.h>
33 #include <linux/ip.h>
34 #include <linux/ipv6.h>
35 #include <linux/mpls.h>
36 #include <linux/sctp.h>
37 #include <linux/smp.h>
38 #include <linux/tcp.h>
39 #include <linux/udp.h>
40 #include <linux/icmp.h>
41 #include <linux/icmpv6.h>
42 #include <linux/rculist.h>
43 #include <net/ip.h>
44 #include <net/ip_tunnels.h>
45 #include <net/ipv6.h>
46 #include <net/mpls.h>
47 #include <net/ndisc.h>
48
49 #include "datapath.h"
50 #include "flow.h"
51 #include "flow_netlink.h"
52
53 u64 ovs_flow_used_time(unsigned long flow_jiffies)
54 {
55 struct timespec cur_ts;
56 u64 cur_ms, idle_ms;
57
58 ktime_get_ts(&cur_ts);
59 idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
60 cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
61 cur_ts.tv_nsec / NSEC_PER_MSEC;
62
63 return cur_ms - idle_ms;
64 }
65
66 #define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF))
67
68 void ovs_flow_stats_update(struct sw_flow *flow, __be16 tcp_flags,
69 const struct sk_buff *skb)
70 {
71 struct flow_stats *stats;
72 int node = numa_node_id();
73 int len = skb->len + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
74
75 stats = rcu_dereference(flow->stats[node]);
76
77 /* Check if already have node-specific stats. */
78 if (likely(stats)) {
79 spin_lock(&stats->lock);
80 /* Mark if we write on the pre-allocated stats. */
81 if (node == 0 && unlikely(flow->stats_last_writer != node))
82 flow->stats_last_writer = node;
83 } else {
84 stats = rcu_dereference(flow->stats[0]); /* Pre-allocated. */
85 spin_lock(&stats->lock);
86
87 /* If the current NUMA-node is the only writer on the
88 * pre-allocated stats keep using them.
89 */
90 if (unlikely(flow->stats_last_writer != node)) {
91 /* A previous locker may have already allocated the
92 * stats, so we need to check again. If node-specific
93 * stats were already allocated, we update the pre-
94 * allocated stats as we have already locked them.
95 */
96 if (likely(flow->stats_last_writer != NUMA_NO_NODE)
97 && likely(!rcu_access_pointer(flow->stats[node]))) {
98 /* Try to allocate node-specific stats. */
99 struct flow_stats *new_stats;
100
101 new_stats =
102 kmem_cache_alloc_node(flow_stats_cache,
103 GFP_NOWAIT |
104 __GFP_THISNODE |
105 __GFP_NOWARN |
106 __GFP_NOMEMALLOC,
107 node);
108 if (likely(new_stats)) {
109 new_stats->used = jiffies;
110 new_stats->packet_count = 1;
111 new_stats->byte_count = len;
112 new_stats->tcp_flags = tcp_flags;
113 spin_lock_init(&new_stats->lock);
114
115 rcu_assign_pointer(flow->stats[node],
116 new_stats);
117 goto unlock;
118 }
119 }
120 flow->stats_last_writer = node;
121 }
122 }
123
124 stats->used = jiffies;
125 stats->packet_count++;
126 stats->byte_count += len;
127 stats->tcp_flags |= tcp_flags;
128 unlock:
129 spin_unlock(&stats->lock);
130 }
131
132 /* Must be called with rcu_read_lock or ovs_mutex. */
133 void ovs_flow_stats_get(const struct sw_flow *flow,
134 struct ovs_flow_stats *ovs_stats,
135 unsigned long *used, __be16 *tcp_flags)
136 {
137 int node;
138
139 *used = 0;
140 *tcp_flags = 0;
141 memset(ovs_stats, 0, sizeof(*ovs_stats));
142
143 for_each_node(node) {
144 struct flow_stats *stats = rcu_dereference_ovsl(flow->stats[node]);
145
146 if (stats) {
147 /* Local CPU may write on non-local stats, so we must
148 * block bottom-halves here.
149 */
150 spin_lock_bh(&stats->lock);
151 if (!*used || time_after(stats->used, *used))
152 *used = stats->used;
153 *tcp_flags |= stats->tcp_flags;
154 ovs_stats->n_packets += stats->packet_count;
155 ovs_stats->n_bytes += stats->byte_count;
156 spin_unlock_bh(&stats->lock);
157 }
158 }
159 }
160
161 /* Called with ovs_mutex. */
162 void ovs_flow_stats_clear(struct sw_flow *flow)
163 {
164 int node;
165
166 for_each_node(node) {
167 struct flow_stats *stats = ovsl_dereference(flow->stats[node]);
168
169 if (stats) {
170 spin_lock_bh(&stats->lock);
171 stats->used = 0;
172 stats->packet_count = 0;
173 stats->byte_count = 0;
174 stats->tcp_flags = 0;
175 spin_unlock_bh(&stats->lock);
176 }
177 }
178 }
179
180 static int check_header(struct sk_buff *skb, int len)
181 {
182 if (unlikely(skb->len < len))
183 return -EINVAL;
184 if (unlikely(!pskb_may_pull(skb, len)))
185 return -ENOMEM;
186 return 0;
187 }
188
189 static bool arphdr_ok(struct sk_buff *skb)
190 {
191 return pskb_may_pull(skb, skb_network_offset(skb) +
192 sizeof(struct arp_eth_header));
193 }
194
195 static int check_iphdr(struct sk_buff *skb)
196 {
197 unsigned int nh_ofs = skb_network_offset(skb);
198 unsigned int ip_len;
199 int err;
200
201 err = check_header(skb, nh_ofs + sizeof(struct iphdr));
202 if (unlikely(err))
203 return err;
204
205 ip_len = ip_hdrlen(skb);
206 if (unlikely(ip_len < sizeof(struct iphdr) ||
207 skb->len < nh_ofs + ip_len))
208 return -EINVAL;
209
210 skb_set_transport_header(skb, nh_ofs + ip_len);
211 return 0;
212 }
213
214 static bool tcphdr_ok(struct sk_buff *skb)
215 {
216 int th_ofs = skb_transport_offset(skb);
217 int tcp_len;
218
219 if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr))))
220 return false;
221
222 tcp_len = tcp_hdrlen(skb);
223 if (unlikely(tcp_len < sizeof(struct tcphdr) ||
224 skb->len < th_ofs + tcp_len))
225 return false;
226
227 return true;
228 }
229
230 static bool udphdr_ok(struct sk_buff *skb)
231 {
232 return pskb_may_pull(skb, skb_transport_offset(skb) +
233 sizeof(struct udphdr));
234 }
235
236 static bool sctphdr_ok(struct sk_buff *skb)
237 {
238 return pskb_may_pull(skb, skb_transport_offset(skb) +
239 sizeof(struct sctphdr));
240 }
241
242 static bool icmphdr_ok(struct sk_buff *skb)
243 {
244 return pskb_may_pull(skb, skb_transport_offset(skb) +
245 sizeof(struct icmphdr));
246 }
247
248 static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
249 {
250 unsigned int nh_ofs = skb_network_offset(skb);
251 unsigned int nh_len;
252 int payload_ofs;
253 struct ipv6hdr *nh;
254 uint8_t nexthdr;
255 __be16 frag_off;
256 int err;
257
258 err = check_header(skb, nh_ofs + sizeof(*nh));
259 if (unlikely(err))
260 return err;
261
262 nh = ipv6_hdr(skb);
263 nexthdr = nh->nexthdr;
264 payload_ofs = (u8 *)(nh + 1) - skb->data;
265
266 key->ip.proto = NEXTHDR_NONE;
267 key->ip.tos = ipv6_get_dsfield(nh);
268 key->ip.ttl = nh->hop_limit;
269 key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
270 key->ipv6.addr.src = nh->saddr;
271 key->ipv6.addr.dst = nh->daddr;
272
273 payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off);
274 if (unlikely(payload_ofs < 0))
275 return -EINVAL;
276
277 if (frag_off) {
278 if (frag_off & htons(~0x7))
279 key->ip.frag = OVS_FRAG_TYPE_LATER;
280 else
281 key->ip.frag = OVS_FRAG_TYPE_FIRST;
282 } else {
283 key->ip.frag = OVS_FRAG_TYPE_NONE;
284 }
285
286 nh_len = payload_ofs - nh_ofs;
287 skb_set_transport_header(skb, nh_ofs + nh_len);
288 key->ip.proto = nexthdr;
289 return nh_len;
290 }
291
292 static bool icmp6hdr_ok(struct sk_buff *skb)
293 {
294 return pskb_may_pull(skb, skb_transport_offset(skb) +
295 sizeof(struct icmp6hdr));
296 }
297
298 static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
299 {
300 struct qtag_prefix {
301 __be16 eth_type; /* ETH_P_8021Q */
302 __be16 tci;
303 };
304 struct qtag_prefix *qp;
305
306 if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16)))
307 return 0;
308
309 if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) +
310 sizeof(__be16))))
311 return -ENOMEM;
312
313 qp = (struct qtag_prefix *) skb->data;
314 key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT);
315 __skb_pull(skb, sizeof(struct qtag_prefix));
316
317 return 0;
318 }
319
320 static __be16 parse_ethertype(struct sk_buff *skb)
321 {
322 struct llc_snap_hdr {
323 u8 dsap; /* Always 0xAA */
324 u8 ssap; /* Always 0xAA */
325 u8 ctrl;
326 u8 oui[3];
327 __be16 ethertype;
328 };
329 struct llc_snap_hdr *llc;
330 __be16 proto;
331
332 proto = *(__be16 *) skb->data;
333 __skb_pull(skb, sizeof(__be16));
334
335 if (ntohs(proto) >= ETH_P_802_3_MIN)
336 return proto;
337
338 if (skb->len < sizeof(struct llc_snap_hdr))
339 return htons(ETH_P_802_2);
340
341 if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr))))
342 return htons(0);
343
344 llc = (struct llc_snap_hdr *) skb->data;
345 if (llc->dsap != LLC_SAP_SNAP ||
346 llc->ssap != LLC_SAP_SNAP ||
347 (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0)
348 return htons(ETH_P_802_2);
349
350 __skb_pull(skb, sizeof(struct llc_snap_hdr));
351
352 if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN)
353 return llc->ethertype;
354
355 return htons(ETH_P_802_2);
356 }
357
358 static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
359 int nh_len)
360 {
361 struct icmp6hdr *icmp = icmp6_hdr(skb);
362
363 /* The ICMPv6 type and code fields use the 16-bit transport port
364 * fields, so we need to store them in 16-bit network byte order.
365 */
366 key->tp.src = htons(icmp->icmp6_type);
367 key->tp.dst = htons(icmp->icmp6_code);
368 memset(&key->ipv6.nd, 0, sizeof(key->ipv6.nd));
369
370 if (icmp->icmp6_code == 0 &&
371 (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
372 icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) {
373 int icmp_len = skb->len - skb_transport_offset(skb);
374 struct nd_msg *nd;
375 int offset;
376
377 /* In order to process neighbor discovery options, we need the
378 * entire packet.
379 */
380 if (unlikely(icmp_len < sizeof(*nd)))
381 return 0;
382
383 if (unlikely(skb_linearize(skb)))
384 return -ENOMEM;
385
386 nd = (struct nd_msg *)skb_transport_header(skb);
387 key->ipv6.nd.target = nd->target;
388
389 icmp_len -= sizeof(*nd);
390 offset = 0;
391 while (icmp_len >= 8) {
392 struct nd_opt_hdr *nd_opt =
393 (struct nd_opt_hdr *)(nd->opt + offset);
394 int opt_len = nd_opt->nd_opt_len * 8;
395
396 if (unlikely(!opt_len || opt_len > icmp_len))
397 return 0;
398
399 /* Store the link layer address if the appropriate
400 * option is provided. It is considered an error if
401 * the same link layer option is specified twice.
402 */
403 if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR
404 && opt_len == 8) {
405 if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
406 goto invalid;
407 ether_addr_copy(key->ipv6.nd.sll,
408 &nd->opt[offset+sizeof(*nd_opt)]);
409 } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR
410 && opt_len == 8) {
411 if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
412 goto invalid;
413 ether_addr_copy(key->ipv6.nd.tll,
414 &nd->opt[offset+sizeof(*nd_opt)]);
415 }
416
417 icmp_len -= opt_len;
418 offset += opt_len;
419 }
420 }
421
422 return 0;
423
424 invalid:
425 memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
426 memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
427 memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
428
429 return 0;
430 }
431
432 /**
433 * key_extract - extracts a flow key from an Ethernet frame.
434 * @skb: sk_buff that contains the frame, with skb->data pointing to the
435 * Ethernet header
436 * @key: output flow key
437 *
438 * The caller must ensure that skb->len >= ETH_HLEN.
439 *
440 * Returns 0 if successful, otherwise a negative errno value.
441 *
442 * Initializes @skb header pointers as follows:
443 *
444 * - skb->mac_header: the Ethernet header.
445 *
446 * - skb->network_header: just past the Ethernet header, or just past the
447 * VLAN header, to the first byte of the Ethernet payload.
448 *
449 * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6
450 * on output, then just past the IP header, if one is present and
451 * of a correct length, otherwise the same as skb->network_header.
452 * For other key->eth.type values it is left untouched.
453 */
454 static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
455 {
456 int error;
457 struct ethhdr *eth;
458
459 /* Flags are always used as part of stats */
460 key->tp.flags = 0;
461
462 skb_reset_mac_header(skb);
463
464 /* Link layer. We are guaranteed to have at least the 14 byte Ethernet
465 * header in the linear data area.
466 */
467 eth = eth_hdr(skb);
468 ether_addr_copy(key->eth.src, eth->h_source);
469 ether_addr_copy(key->eth.dst, eth->h_dest);
470
471 __skb_pull(skb, 2 * ETH_ALEN);
472 /* We are going to push all headers that we pull, so no need to
473 * update skb->csum here.
474 */
475
476 key->eth.tci = 0;
477 if (skb_vlan_tag_present(skb))
478 key->eth.tci = htons(skb->vlan_tci);
479 else if (eth->h_proto == htons(ETH_P_8021Q))
480 if (unlikely(parse_vlan(skb, key)))
481 return -ENOMEM;
482
483 key->eth.type = parse_ethertype(skb);
484 if (unlikely(key->eth.type == htons(0)))
485 return -ENOMEM;
486
487 skb_reset_network_header(skb);
488 skb_reset_mac_len(skb);
489 __skb_push(skb, skb->data - skb_mac_header(skb));
490
491 /* Network layer. */
492 if (key->eth.type == htons(ETH_P_IP)) {
493 struct iphdr *nh;
494 __be16 offset;
495
496 error = check_iphdr(skb);
497 if (unlikely(error)) {
498 memset(&key->ip, 0, sizeof(key->ip));
499 memset(&key->ipv4, 0, sizeof(key->ipv4));
500 if (error == -EINVAL) {
501 skb->transport_header = skb->network_header;
502 error = 0;
503 }
504 return error;
505 }
506
507 nh = ip_hdr(skb);
508 key->ipv4.addr.src = nh->saddr;
509 key->ipv4.addr.dst = nh->daddr;
510
511 key->ip.proto = nh->protocol;
512 key->ip.tos = nh->tos;
513 key->ip.ttl = nh->ttl;
514
515 offset = nh->frag_off & htons(IP_OFFSET);
516 if (offset) {
517 key->ip.frag = OVS_FRAG_TYPE_LATER;
518 return 0;
519 }
520 if (nh->frag_off & htons(IP_MF) ||
521 skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
522 key->ip.frag = OVS_FRAG_TYPE_FIRST;
523 else
524 key->ip.frag = OVS_FRAG_TYPE_NONE;
525
526 /* Transport layer. */
527 if (key->ip.proto == IPPROTO_TCP) {
528 if (tcphdr_ok(skb)) {
529 struct tcphdr *tcp = tcp_hdr(skb);
530 key->tp.src = tcp->source;
531 key->tp.dst = tcp->dest;
532 key->tp.flags = TCP_FLAGS_BE16(tcp);
533 } else {
534 memset(&key->tp, 0, sizeof(key->tp));
535 }
536
537 } else if (key->ip.proto == IPPROTO_UDP) {
538 if (udphdr_ok(skb)) {
539 struct udphdr *udp = udp_hdr(skb);
540 key->tp.src = udp->source;
541 key->tp.dst = udp->dest;
542 } else {
543 memset(&key->tp, 0, sizeof(key->tp));
544 }
545 } else if (key->ip.proto == IPPROTO_SCTP) {
546 if (sctphdr_ok(skb)) {
547 struct sctphdr *sctp = sctp_hdr(skb);
548 key->tp.src = sctp->source;
549 key->tp.dst = sctp->dest;
550 } else {
551 memset(&key->tp, 0, sizeof(key->tp));
552 }
553 } else if (key->ip.proto == IPPROTO_ICMP) {
554 if (icmphdr_ok(skb)) {
555 struct icmphdr *icmp = icmp_hdr(skb);
556 /* The ICMP type and code fields use the 16-bit
557 * transport port fields, so we need to store
558 * them in 16-bit network byte order. */
559 key->tp.src = htons(icmp->type);
560 key->tp.dst = htons(icmp->code);
561 } else {
562 memset(&key->tp, 0, sizeof(key->tp));
563 }
564 }
565
566 } else if (key->eth.type == htons(ETH_P_ARP) ||
567 key->eth.type == htons(ETH_P_RARP)) {
568 struct arp_eth_header *arp;
569 bool arp_available = arphdr_ok(skb);
570
571 arp = (struct arp_eth_header *)skb_network_header(skb);
572
573 if (arp_available &&
574 arp->ar_hrd == htons(ARPHRD_ETHER) &&
575 arp->ar_pro == htons(ETH_P_IP) &&
576 arp->ar_hln == ETH_ALEN &&
577 arp->ar_pln == 4) {
578
579 /* We only match on the lower 8 bits of the opcode. */
580 if (ntohs(arp->ar_op) <= 0xff)
581 key->ip.proto = ntohs(arp->ar_op);
582 else
583 key->ip.proto = 0;
584
585 memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
586 memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
587 ether_addr_copy(key->ipv4.arp.sha, arp->ar_sha);
588 ether_addr_copy(key->ipv4.arp.tha, arp->ar_tha);
589 } else {
590 memset(&key->ip, 0, sizeof(key->ip));
591 memset(&key->ipv4, 0, sizeof(key->ipv4));
592 }
593 } else if (eth_p_mpls(key->eth.type)) {
594 size_t stack_len = MPLS_HLEN;
595
596 /* In the presence of an MPLS label stack the end of the L2
597 * header and the beginning of the L3 header differ.
598 *
599 * Advance network_header to the beginning of the L3
600 * header. mac_len corresponds to the end of the L2 header.
601 */
602 while (1) {
603 __be32 lse;
604
605 error = check_header(skb, skb->mac_len + stack_len);
606 if (unlikely(error))
607 return 0;
608
609 memcpy(&lse, skb_network_header(skb), MPLS_HLEN);
610
611 if (stack_len == MPLS_HLEN)
612 memcpy(&key->mpls.top_lse, &lse, MPLS_HLEN);
613
614 skb_set_network_header(skb, skb->mac_len + stack_len);
615 if (lse & htonl(MPLS_LS_S_MASK))
616 break;
617
618 stack_len += MPLS_HLEN;
619 }
620 } else if (key->eth.type == htons(ETH_P_IPV6)) {
621 int nh_len; /* IPv6 Header + Extensions */
622
623 nh_len = parse_ipv6hdr(skb, key);
624 if (unlikely(nh_len < 0)) {
625 memset(&key->ip, 0, sizeof(key->ip));
626 memset(&key->ipv6.addr, 0, sizeof(key->ipv6.addr));
627 if (nh_len == -EINVAL) {
628 skb->transport_header = skb->network_header;
629 error = 0;
630 } else {
631 error = nh_len;
632 }
633 return error;
634 }
635
636 if (key->ip.frag == OVS_FRAG_TYPE_LATER)
637 return 0;
638 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
639 key->ip.frag = OVS_FRAG_TYPE_FIRST;
640
641 /* Transport layer. */
642 if (key->ip.proto == NEXTHDR_TCP) {
643 if (tcphdr_ok(skb)) {
644 struct tcphdr *tcp = tcp_hdr(skb);
645 key->tp.src = tcp->source;
646 key->tp.dst = tcp->dest;
647 key->tp.flags = TCP_FLAGS_BE16(tcp);
648 } else {
649 memset(&key->tp, 0, sizeof(key->tp));
650 }
651 } else if (key->ip.proto == NEXTHDR_UDP) {
652 if (udphdr_ok(skb)) {
653 struct udphdr *udp = udp_hdr(skb);
654 key->tp.src = udp->source;
655 key->tp.dst = udp->dest;
656 } else {
657 memset(&key->tp, 0, sizeof(key->tp));
658 }
659 } else if (key->ip.proto == NEXTHDR_SCTP) {
660 if (sctphdr_ok(skb)) {
661 struct sctphdr *sctp = sctp_hdr(skb);
662 key->tp.src = sctp->source;
663 key->tp.dst = sctp->dest;
664 } else {
665 memset(&key->tp, 0, sizeof(key->tp));
666 }
667 } else if (key->ip.proto == NEXTHDR_ICMP) {
668 if (icmp6hdr_ok(skb)) {
669 error = parse_icmpv6(skb, key, nh_len);
670 if (error)
671 return error;
672 } else {
673 memset(&key->tp, 0, sizeof(key->tp));
674 }
675 }
676 }
677 return 0;
678 }
679
680 int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key)
681 {
682 return key_extract(skb, key);
683 }
684
685 int ovs_flow_key_extract(const struct ovs_tunnel_info *tun_info,
686 struct sk_buff *skb, struct sw_flow_key *key)
687 {
688 /* Extract metadata from packet. */
689 if (tun_info) {
690 memcpy(&key->tun_key, &tun_info->tunnel, sizeof(key->tun_key));
691
692 if (tun_info->options) {
693 BUILD_BUG_ON((1 << (sizeof(tun_info->options_len) *
694 8)) - 1
695 > sizeof(key->tun_opts));
696 memcpy(TUN_METADATA_OPTS(key, tun_info->options_len),
697 tun_info->options, tun_info->options_len);
698 key->tun_opts_len = tun_info->options_len;
699 } else {
700 key->tun_opts_len = 0;
701 }
702 } else {
703 key->tun_opts_len = 0;
704 memset(&key->tun_key, 0, sizeof(key->tun_key));
705 }
706
707 key->phy.priority = skb->priority;
708 key->phy.in_port = OVS_CB(skb)->input_vport->port_no;
709 key->phy.skb_mark = skb->mark;
710 key->ovs_flow_hash = 0;
711 key->recirc_id = 0;
712
713 return key_extract(skb, key);
714 }
715
716 int ovs_flow_key_extract_userspace(const struct nlattr *attr,
717 struct sk_buff *skb,
718 struct sw_flow_key *key, bool log)
719 {
720 int err;
721
722 memset(key, 0, OVS_SW_FLOW_KEY_METADATA_SIZE);
723
724 /* Extract metadata from netlink attributes. */
725 err = ovs_nla_get_flow_metadata(attr, key, log);
726 if (err)
727 return err;
728
729 return key_extract(skb, key);
730 }
Linux with added FPC-III support