2 * Copyright (c) 2007-2011 Nicira, Inc.
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.
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.
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
21 #include <linux/uaccess.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/if_ether.h>
25 #include <linux/if_vlan.h>
26 #include <net/llc_pdu.h>
27 #include <linux/kernel.h>
28 #include <linux/jhash.h>
29 #include <linux/jiffies.h>
30 #include <linux/llc.h>
31 #include <linux/module.h>
33 #include <linux/rcupdate.h>
34 #include <linux/if_arp.h>
36 #include <linux/ipv6.h>
37 #include <linux/tcp.h>
38 #include <linux/udp.h>
39 #include <linux/icmp.h>
40 #include <linux/icmpv6.h>
41 #include <linux/rculist.h>
44 #include <net/ndisc.h>
48 static struct kmem_cache *flow_cache;
50 static int check_header(struct sk_buff *skb, int len)
52 if (unlikely(skb->len < len))
54 if (unlikely(!pskb_may_pull(skb, len)))
59 static bool arphdr_ok(struct sk_buff *skb)
61 return pskb_may_pull(skb, skb_network_offset(skb) +
62 sizeof(struct arp_eth_header));
65 static int check_iphdr(struct sk_buff *skb)
67 unsigned int nh_ofs = skb_network_offset(skb);
71 err = check_header(skb, nh_ofs + sizeof(struct iphdr));
75 ip_len = ip_hdrlen(skb);
76 if (unlikely(ip_len < sizeof(struct iphdr) ||
77 skb->len < nh_ofs + ip_len))
80 skb_set_transport_header(skb, nh_ofs + ip_len);
84 static bool tcphdr_ok(struct sk_buff *skb)
86 int th_ofs = skb_transport_offset(skb);
89 if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr))))
92 tcp_len = tcp_hdrlen(skb);
93 if (unlikely(tcp_len < sizeof(struct tcphdr) ||
94 skb->len < th_ofs + tcp_len))
100 static bool udphdr_ok(struct sk_buff *skb)
102 return pskb_may_pull(skb, skb_transport_offset(skb) +
103 sizeof(struct udphdr));
106 static bool icmphdr_ok(struct sk_buff *skb)
108 return pskb_may_pull(skb, skb_transport_offset(skb) +
109 sizeof(struct icmphdr));
112 u64 ovs_flow_used_time(unsigned long flow_jiffies)
114 struct timespec cur_ts;
117 ktime_get_ts(&cur_ts);
118 idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
119 cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
120 cur_ts.tv_nsec / NSEC_PER_MSEC;
122 return cur_ms - idle_ms;
125 #define SW_FLOW_KEY_OFFSET(field) \
126 (offsetof(struct sw_flow_key, field) + \
127 FIELD_SIZEOF(struct sw_flow_key, field))
129 static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key,
132 unsigned int nh_ofs = skb_network_offset(skb);
140 *key_lenp = SW_FLOW_KEY_OFFSET(ipv6.label);
142 err = check_header(skb, nh_ofs + sizeof(*nh));
147 nexthdr = nh->nexthdr;
148 payload_ofs = (u8 *)(nh + 1) - skb->data;
150 key->ip.proto = NEXTHDR_NONE;
151 key->ip.tos = ipv6_get_dsfield(nh);
152 key->ip.ttl = nh->hop_limit;
153 key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
154 key->ipv6.addr.src = nh->saddr;
155 key->ipv6.addr.dst = nh->daddr;
157 payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off);
158 if (unlikely(payload_ofs < 0))
162 if (frag_off & htons(~0x7))
163 key->ip.frag = OVS_FRAG_TYPE_LATER;
165 key->ip.frag = OVS_FRAG_TYPE_FIRST;
168 nh_len = payload_ofs - nh_ofs;
169 skb_set_transport_header(skb, nh_ofs + nh_len);
170 key->ip.proto = nexthdr;
174 static bool icmp6hdr_ok(struct sk_buff *skb)
176 return pskb_may_pull(skb, skb_transport_offset(skb) +
177 sizeof(struct icmp6hdr));
180 #define TCP_FLAGS_OFFSET 13
181 #define TCP_FLAG_MASK 0x3f
183 void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb)
187 if ((flow->key.eth.type == htons(ETH_P_IP) ||
188 flow->key.eth.type == htons(ETH_P_IPV6)) &&
189 flow->key.ip.proto == IPPROTO_TCP &&
190 likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
191 u8 *tcp = (u8 *)tcp_hdr(skb);
192 tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
195 spin_lock(&flow->lock);
196 flow->used = jiffies;
197 flow->packet_count++;
198 flow->byte_count += skb->len;
199 flow->tcp_flags |= tcp_flags;
200 spin_unlock(&flow->lock);
203 struct sw_flow_actions *ovs_flow_actions_alloc(const struct nlattr *actions)
205 int actions_len = nla_len(actions);
206 struct sw_flow_actions *sfa;
208 if (actions_len > MAX_ACTIONS_BUFSIZE)
209 return ERR_PTR(-EINVAL);
211 sfa = kmalloc(sizeof(*sfa) + actions_len, GFP_KERNEL);
213 return ERR_PTR(-ENOMEM);
215 sfa->actions_len = actions_len;
216 memcpy(sfa->actions, nla_data(actions), actions_len);
220 struct sw_flow *ovs_flow_alloc(void)
222 struct sw_flow *flow;
224 flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
226 return ERR_PTR(-ENOMEM);
228 spin_lock_init(&flow->lock);
229 flow->sf_acts = NULL;
234 static struct hlist_head *find_bucket(struct flow_table *table, u32 hash)
236 hash = jhash_1word(hash, table->hash_seed);
237 return flex_array_get(table->buckets,
238 (hash & (table->n_buckets - 1)));
241 static struct flex_array *alloc_buckets(unsigned int n_buckets)
243 struct flex_array *buckets;
246 buckets = flex_array_alloc(sizeof(struct hlist_head *),
247 n_buckets, GFP_KERNEL);
251 err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL);
253 flex_array_free(buckets);
257 for (i = 0; i < n_buckets; i++)
258 INIT_HLIST_HEAD((struct hlist_head *)
259 flex_array_get(buckets, i));
264 static void free_buckets(struct flex_array *buckets)
266 flex_array_free(buckets);
269 struct flow_table *ovs_flow_tbl_alloc(int new_size)
271 struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL);
276 table->buckets = alloc_buckets(new_size);
278 if (!table->buckets) {
282 table->n_buckets = new_size;
285 table->keep_flows = false;
286 get_random_bytes(&table->hash_seed, sizeof(u32));
291 void ovs_flow_tbl_destroy(struct flow_table *table)
298 if (table->keep_flows)
301 for (i = 0; i < table->n_buckets; i++) {
302 struct sw_flow *flow;
303 struct hlist_head *head = flex_array_get(table->buckets, i);
304 struct hlist_node *node, *n;
305 int ver = table->node_ver;
307 hlist_for_each_entry_safe(flow, node, n, head, hash_node[ver]) {
308 hlist_del_rcu(&flow->hash_node[ver]);
314 free_buckets(table->buckets);
318 static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu)
320 struct flow_table *table = container_of(rcu, struct flow_table, rcu);
322 ovs_flow_tbl_destroy(table);
325 void ovs_flow_tbl_deferred_destroy(struct flow_table *table)
330 call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb);
333 struct sw_flow *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *last)
335 struct sw_flow *flow;
336 struct hlist_head *head;
337 struct hlist_node *n;
341 ver = table->node_ver;
342 while (*bucket < table->n_buckets) {
344 head = flex_array_get(table->buckets, *bucket);
345 hlist_for_each_entry_rcu(flow, n, head, hash_node[ver]) {
360 static void __flow_tbl_insert(struct flow_table *table, struct sw_flow *flow)
362 struct hlist_head *head;
363 head = find_bucket(table, flow->hash);
364 hlist_add_head_rcu(&flow->hash_node[table->node_ver], head);
368 static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new)
373 old_ver = old->node_ver;
374 new->node_ver = !old_ver;
376 /* Insert in new table. */
377 for (i = 0; i < old->n_buckets; i++) {
378 struct sw_flow *flow;
379 struct hlist_head *head;
380 struct hlist_node *n;
382 head = flex_array_get(old->buckets, i);
384 hlist_for_each_entry(flow, n, head, hash_node[old_ver])
385 __flow_tbl_insert(new, flow);
387 old->keep_flows = true;
390 static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets)
392 struct flow_table *new_table;
394 new_table = ovs_flow_tbl_alloc(n_buckets);
396 return ERR_PTR(-ENOMEM);
398 flow_table_copy_flows(table, new_table);
403 struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table)
405 return __flow_tbl_rehash(table, table->n_buckets);
408 struct flow_table *ovs_flow_tbl_expand(struct flow_table *table)
410 return __flow_tbl_rehash(table, table->n_buckets * 2);
413 void ovs_flow_free(struct sw_flow *flow)
418 kfree((struct sf_flow_acts __force *)flow->sf_acts);
419 kmem_cache_free(flow_cache, flow);
422 /* RCU callback used by ovs_flow_deferred_free. */
423 static void rcu_free_flow_callback(struct rcu_head *rcu)
425 struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
430 /* Schedules 'flow' to be freed after the next RCU grace period.
431 * The caller must hold rcu_read_lock for this to be sensible. */
432 void ovs_flow_deferred_free(struct sw_flow *flow)
434 call_rcu(&flow->rcu, rcu_free_flow_callback);
437 /* RCU callback used by ovs_flow_deferred_free_acts. */
438 static void rcu_free_acts_callback(struct rcu_head *rcu)
440 struct sw_flow_actions *sf_acts = container_of(rcu,
441 struct sw_flow_actions, rcu);
445 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
446 * The caller must hold rcu_read_lock for this to be sensible. */
447 void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts)
449 call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
452 static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
455 __be16 eth_type; /* ETH_P_8021Q */
458 struct qtag_prefix *qp;
460 if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16)))
463 if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) +
467 qp = (struct qtag_prefix *) skb->data;
468 key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT);
469 __skb_pull(skb, sizeof(struct qtag_prefix));
474 static __be16 parse_ethertype(struct sk_buff *skb)
476 struct llc_snap_hdr {
477 u8 dsap; /* Always 0xAA */
478 u8 ssap; /* Always 0xAA */
483 struct llc_snap_hdr *llc;
486 proto = *(__be16 *) skb->data;
487 __skb_pull(skb, sizeof(__be16));
489 if (ntohs(proto) >= 1536)
492 if (skb->len < sizeof(struct llc_snap_hdr))
493 return htons(ETH_P_802_2);
495 if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr))))
498 llc = (struct llc_snap_hdr *) skb->data;
499 if (llc->dsap != LLC_SAP_SNAP ||
500 llc->ssap != LLC_SAP_SNAP ||
501 (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0)
502 return htons(ETH_P_802_2);
504 __skb_pull(skb, sizeof(struct llc_snap_hdr));
505 return llc->ethertype;
508 static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
509 int *key_lenp, int nh_len)
511 struct icmp6hdr *icmp = icmp6_hdr(skb);
515 /* The ICMPv6 type and code fields use the 16-bit transport port
516 * fields, so we need to store them in 16-bit network byte order.
518 key->ipv6.tp.src = htons(icmp->icmp6_type);
519 key->ipv6.tp.dst = htons(icmp->icmp6_code);
520 key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
522 if (icmp->icmp6_code == 0 &&
523 (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
524 icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) {
525 int icmp_len = skb->len - skb_transport_offset(skb);
529 key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
531 /* In order to process neighbor discovery options, we need the
534 if (unlikely(icmp_len < sizeof(*nd)))
536 if (unlikely(skb_linearize(skb))) {
541 nd = (struct nd_msg *)skb_transport_header(skb);
542 key->ipv6.nd.target = nd->target;
543 key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
545 icmp_len -= sizeof(*nd);
547 while (icmp_len >= 8) {
548 struct nd_opt_hdr *nd_opt =
549 (struct nd_opt_hdr *)(nd->opt + offset);
550 int opt_len = nd_opt->nd_opt_len * 8;
552 if (unlikely(!opt_len || opt_len > icmp_len))
555 /* Store the link layer address if the appropriate
556 * option is provided. It is considered an error if
557 * the same link layer option is specified twice.
559 if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR
561 if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
563 memcpy(key->ipv6.nd.sll,
564 &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
565 } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR
567 if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
569 memcpy(key->ipv6.nd.tll,
570 &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
581 memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
582 memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
583 memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
591 * ovs_flow_extract - extracts a flow key from an Ethernet frame.
592 * @skb: sk_buff that contains the frame, with skb->data pointing to the
594 * @in_port: port number on which @skb was received.
595 * @key: output flow key
596 * @key_lenp: length of output flow key
598 * The caller must ensure that skb->len >= ETH_HLEN.
600 * Returns 0 if successful, otherwise a negative errno value.
602 * Initializes @skb header pointers as follows:
604 * - skb->mac_header: the Ethernet header.
606 * - skb->network_header: just past the Ethernet header, or just past the
607 * VLAN header, to the first byte of the Ethernet payload.
609 * - skb->transport_header: If key->dl_type is ETH_P_IP or ETH_P_IPV6
610 * on output, then just past the IP header, if one is present and
611 * of a correct length, otherwise the same as skb->network_header.
612 * For other key->dl_type values it is left untouched.
614 int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
618 int key_len = SW_FLOW_KEY_OFFSET(eth);
621 memset(key, 0, sizeof(*key));
623 key->phy.priority = skb->priority;
624 if (OVS_CB(skb)->tun_key)
625 memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key));
626 key->phy.in_port = in_port;
627 key->phy.skb_mark = skb_get_mark(skb);
629 skb_reset_mac_header(skb);
631 /* Link layer. We are guaranteed to have at least the 14 byte Ethernet
632 * header in the linear data area.
635 memcpy(key->eth.src, eth->h_source, ETH_ALEN);
636 memcpy(key->eth.dst, eth->h_dest, ETH_ALEN);
638 __skb_pull(skb, 2 * ETH_ALEN);
640 if (vlan_tx_tag_present(skb))
641 key->eth.tci = htons(vlan_get_tci(skb));
642 else if (eth->h_proto == htons(ETH_P_8021Q))
643 if (unlikely(parse_vlan(skb, key)))
646 key->eth.type = parse_ethertype(skb);
647 if (unlikely(key->eth.type == htons(0)))
650 skb_reset_network_header(skb);
651 __skb_push(skb, skb->data - skb_mac_header(skb));
654 if (key->eth.type == htons(ETH_P_IP)) {
658 key_len = SW_FLOW_KEY_OFFSET(ipv4.addr);
660 error = check_iphdr(skb);
661 if (unlikely(error)) {
662 if (error == -EINVAL) {
663 skb->transport_header = skb->network_header;
670 key->ipv4.addr.src = nh->saddr;
671 key->ipv4.addr.dst = nh->daddr;
673 key->ip.proto = nh->protocol;
674 key->ip.tos = nh->tos;
675 key->ip.ttl = nh->ttl;
677 offset = nh->frag_off & htons(IP_OFFSET);
679 key->ip.frag = OVS_FRAG_TYPE_LATER;
682 if (nh->frag_off & htons(IP_MF) ||
683 skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
684 key->ip.frag = OVS_FRAG_TYPE_FIRST;
686 /* Transport layer. */
687 if (key->ip.proto == IPPROTO_TCP) {
688 key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
689 if (tcphdr_ok(skb)) {
690 struct tcphdr *tcp = tcp_hdr(skb);
691 key->ipv4.tp.src = tcp->source;
692 key->ipv4.tp.dst = tcp->dest;
694 } else if (key->ip.proto == IPPROTO_UDP) {
695 key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
696 if (udphdr_ok(skb)) {
697 struct udphdr *udp = udp_hdr(skb);
698 key->ipv4.tp.src = udp->source;
699 key->ipv4.tp.dst = udp->dest;
701 } else if (key->ip.proto == IPPROTO_ICMP) {
702 key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
703 if (icmphdr_ok(skb)) {
704 struct icmphdr *icmp = icmp_hdr(skb);
705 /* The ICMP type and code fields use the 16-bit
706 * transport port fields, so we need to store
707 * them in 16-bit network byte order. */
708 key->ipv4.tp.src = htons(icmp->type);
709 key->ipv4.tp.dst = htons(icmp->code);
713 } else if ((key->eth.type == htons(ETH_P_ARP) ||
714 key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) {
715 struct arp_eth_header *arp;
717 arp = (struct arp_eth_header *)skb_network_header(skb);
719 if (arp->ar_hrd == htons(ARPHRD_ETHER)
720 && arp->ar_pro == htons(ETH_P_IP)
721 && arp->ar_hln == ETH_ALEN
722 && arp->ar_pln == 4) {
724 /* We only match on the lower 8 bits of the opcode. */
725 if (ntohs(arp->ar_op) <= 0xff)
726 key->ip.proto = ntohs(arp->ar_op);
727 memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
728 memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
729 memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN);
730 memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN);
731 key_len = SW_FLOW_KEY_OFFSET(ipv4.arp);
733 } else if (key->eth.type == htons(ETH_P_IPV6)) {
734 int nh_len; /* IPv6 Header + Extensions */
736 nh_len = parse_ipv6hdr(skb, key, &key_len);
737 if (unlikely(nh_len < 0)) {
738 if (nh_len == -EINVAL)
739 skb->transport_header = skb->network_header;
745 if (key->ip.frag == OVS_FRAG_TYPE_LATER)
747 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
748 key->ip.frag = OVS_FRAG_TYPE_FIRST;
750 /* Transport layer. */
751 if (key->ip.proto == NEXTHDR_TCP) {
752 key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
753 if (tcphdr_ok(skb)) {
754 struct tcphdr *tcp = tcp_hdr(skb);
755 key->ipv6.tp.src = tcp->source;
756 key->ipv6.tp.dst = tcp->dest;
758 } else if (key->ip.proto == NEXTHDR_UDP) {
759 key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
760 if (udphdr_ok(skb)) {
761 struct udphdr *udp = udp_hdr(skb);
762 key->ipv6.tp.src = udp->source;
763 key->ipv6.tp.dst = udp->dest;
765 } else if (key->ip.proto == NEXTHDR_ICMP) {
766 key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
767 if (icmp6hdr_ok(skb)) {
768 error = parse_icmpv6(skb, key, &key_len, nh_len);
780 static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, int key_len)
782 return jhash2((u32 *)((u8 *)key + key_start),
783 DIV_ROUND_UP(key_len - key_start, sizeof(u32)), 0);
786 static int flow_key_start(struct sw_flow_key *key)
788 if (key->tun_key.ipv4_dst)
791 return offsetof(struct sw_flow_key, phy);
794 struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table,
795 struct sw_flow_key *key, int key_len)
797 struct sw_flow *flow;
798 struct hlist_node *n;
799 struct hlist_head *head;
804 key_start = flow_key_start(key);
805 hash = ovs_flow_hash(key, key_start, key_len);
807 _key = (u8 *) key + key_start;
808 head = find_bucket(table, hash);
809 hlist_for_each_entry_rcu(flow, n, head, hash_node[table->node_ver]) {
811 if (flow->hash == hash &&
812 !memcmp((u8 *)&flow->key + key_start, _key, key_len - key_start)) {
819 void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
820 struct sw_flow_key *key, int key_len)
822 flow->hash = ovs_flow_hash(key, flow_key_start(key), key_len);
823 memcpy(&flow->key, key, sizeof(flow->key));
824 __flow_tbl_insert(table, flow);
827 void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow)
829 hlist_del_rcu(&flow->hash_node[table->node_ver]);
831 BUG_ON(table->count < 0);
834 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
835 const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
836 [OVS_KEY_ATTR_ENCAP] = -1,
837 [OVS_KEY_ATTR_PRIORITY] = sizeof(u32),
838 [OVS_KEY_ATTR_IN_PORT] = sizeof(u32),
839 [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32),
840 [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet),
841 [OVS_KEY_ATTR_VLAN] = sizeof(__be16),
842 [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16),
843 [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4),
844 [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6),
845 [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp),
846 [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp),
847 [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp),
848 [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6),
849 [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
850 [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
851 [OVS_KEY_ATTR_IPV4_TUNNEL] = sizeof(struct ovs_key_ipv4_tunnel),
854 [OVS_KEY_ATTR_TUN_ID] = sizeof(__be64),
857 static int ipv4_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_len,
858 const struct nlattr *a[], u64 *attrs)
860 const struct ovs_key_icmp *icmp_key;
861 const struct ovs_key_tcp *tcp_key;
862 const struct ovs_key_udp *udp_key;
864 switch (swkey->ip.proto) {
866 if (!(*attrs & (1 << OVS_KEY_ATTR_TCP)))
868 *attrs &= ~(1 << OVS_KEY_ATTR_TCP);
870 *key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
871 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
872 swkey->ipv4.tp.src = tcp_key->tcp_src;
873 swkey->ipv4.tp.dst = tcp_key->tcp_dst;
877 if (!(*attrs & (1 << OVS_KEY_ATTR_UDP)))
879 *attrs &= ~(1 << OVS_KEY_ATTR_UDP);
881 *key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
882 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
883 swkey->ipv4.tp.src = udp_key->udp_src;
884 swkey->ipv4.tp.dst = udp_key->udp_dst;
888 if (!(*attrs & (1 << OVS_KEY_ATTR_ICMP)))
890 *attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
892 *key_len = SW_FLOW_KEY_OFFSET(ipv4.tp);
893 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
894 swkey->ipv4.tp.src = htons(icmp_key->icmp_type);
895 swkey->ipv4.tp.dst = htons(icmp_key->icmp_code);
902 static int ipv6_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_len,
903 const struct nlattr *a[], u64 *attrs)
905 const struct ovs_key_icmpv6 *icmpv6_key;
906 const struct ovs_key_tcp *tcp_key;
907 const struct ovs_key_udp *udp_key;
909 switch (swkey->ip.proto) {
911 if (!(*attrs & (1 << OVS_KEY_ATTR_TCP)))
913 *attrs &= ~(1 << OVS_KEY_ATTR_TCP);
915 *key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
916 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
917 swkey->ipv6.tp.src = tcp_key->tcp_src;
918 swkey->ipv6.tp.dst = tcp_key->tcp_dst;
922 if (!(*attrs & (1 << OVS_KEY_ATTR_UDP)))
924 *attrs &= ~(1 << OVS_KEY_ATTR_UDP);
926 *key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
927 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
928 swkey->ipv6.tp.src = udp_key->udp_src;
929 swkey->ipv6.tp.dst = udp_key->udp_dst;
933 if (!(*attrs & (1 << OVS_KEY_ATTR_ICMPV6)))
935 *attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
937 *key_len = SW_FLOW_KEY_OFFSET(ipv6.tp);
938 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
939 swkey->ipv6.tp.src = htons(icmpv6_key->icmpv6_type);
940 swkey->ipv6.tp.dst = htons(icmpv6_key->icmpv6_code);
942 if (swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_SOLICITATION) ||
943 swkey->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
944 const struct ovs_key_nd *nd_key;
946 if (!(*attrs & (1 << OVS_KEY_ATTR_ND)))
948 *attrs &= ~(1 << OVS_KEY_ATTR_ND);
950 *key_len = SW_FLOW_KEY_OFFSET(ipv6.nd);
951 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
952 memcpy(&swkey->ipv6.nd.target, nd_key->nd_target,
953 sizeof(swkey->ipv6.nd.target));
954 memcpy(swkey->ipv6.nd.sll, nd_key->nd_sll, ETH_ALEN);
955 memcpy(swkey->ipv6.nd.tll, nd_key->nd_tll, ETH_ALEN);
963 static int parse_flow_nlattrs(const struct nlattr *attr,
964 const struct nlattr *a[], u64 *attrsp)
966 const struct nlattr *nla;
971 nla_for_each_nested(nla, attr, rem) {
972 u16 type = nla_type(nla);
975 if (type > OVS_KEY_ATTR_MAX || attrs & (1ULL << type))
978 expected_len = ovs_key_lens[type];
979 if (nla_len(nla) != expected_len && expected_len != -1)
982 attrs |= 1ULL << type;
993 * ovs_flow_from_nlattrs - parses Netlink attributes into a flow key.
994 * @swkey: receives the extracted flow key.
995 * @key_lenp: number of bytes used in @swkey.
996 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
999 int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
1000 const struct nlattr *attr)
1002 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1003 const struct ovs_key_ethernet *eth_key;
1008 memset(swkey, 0, sizeof(struct sw_flow_key));
1009 key_len = SW_FLOW_KEY_OFFSET(eth);
1011 err = parse_flow_nlattrs(attr, a, &attrs);
1015 /* Metadata attributes. */
1016 if (attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1017 swkey->phy.priority = nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]);
1018 attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1020 if (attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1021 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1022 if (in_port >= DP_MAX_PORTS)
1024 swkey->phy.in_port = in_port;
1025 attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1027 swkey->phy.in_port = DP_MAX_PORTS;
1029 if (attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1030 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1031 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER)
1035 swkey->phy.skb_mark = mark;
1036 attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1039 if (attrs & (1ULL << OVS_KEY_ATTR_TUN_ID) &&
1040 attrs & (1ULL << OVS_KEY_ATTR_IPV4_TUNNEL)) {
1041 struct ovs_key_ipv4_tunnel *tun_key;
1044 tun_key = nla_data(a[OVS_KEY_ATTR_IPV4_TUNNEL]);
1046 if (!tun_key->ipv4_dst)
1048 if (!(tun_key->tun_flags & OVS_TNL_F_KEY))
1051 tun_id = nla_get_be64(a[OVS_KEY_ATTR_TUN_ID]);
1052 if (tun_id != tun_key->tun_id)
1055 memcpy(&swkey->tun_key, tun_key, sizeof(swkey->tun_key));
1057 attrs &= ~(1ULL << OVS_KEY_ATTR_TUN_ID);
1058 attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4_TUNNEL);
1059 } else if (attrs & (1ULL << OVS_KEY_ATTR_IPV4_TUNNEL)) {
1060 struct ovs_key_ipv4_tunnel *tun_key;
1061 tun_key = nla_data(a[OVS_KEY_ATTR_IPV4_TUNNEL]);
1063 if (!tun_key->ipv4_dst)
1066 memcpy(&swkey->tun_key, tun_key, sizeof(swkey->tun_key));
1068 attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4_TUNNEL);
1071 /* Data attributes. */
1072 if (!(attrs & (1 << OVS_KEY_ATTR_ETHERNET)))
1074 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1076 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1077 memcpy(swkey->eth.src, eth_key->eth_src, ETH_ALEN);
1078 memcpy(swkey->eth.dst, eth_key->eth_dst, ETH_ALEN);
1080 if (attrs & (1u << OVS_KEY_ATTR_ETHERTYPE) &&
1081 nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q)) {
1082 const struct nlattr *encap;
1085 if (attrs != ((1 << OVS_KEY_ATTR_VLAN) |
1086 (1 << OVS_KEY_ATTR_ETHERTYPE) |
1087 (1 << OVS_KEY_ATTR_ENCAP)))
1090 encap = a[OVS_KEY_ATTR_ENCAP];
1091 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1092 if (tci & htons(VLAN_TAG_PRESENT)) {
1093 swkey->eth.tci = tci;
1095 err = parse_flow_nlattrs(encap, a, &attrs);
1099 /* Corner case for truncated 802.1Q header. */
1103 swkey->eth.type = htons(ETH_P_8021Q);
1104 *key_lenp = key_len;
1111 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1112 swkey->eth.type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1113 if (ntohs(swkey->eth.type) < 1536)
1115 attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1117 swkey->eth.type = htons(ETH_P_802_2);
1120 if (swkey->eth.type == htons(ETH_P_IP)) {
1121 const struct ovs_key_ipv4 *ipv4_key;
1123 if (!(attrs & (1 << OVS_KEY_ATTR_IPV4)))
1125 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1127 key_len = SW_FLOW_KEY_OFFSET(ipv4.addr);
1128 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1129 if (ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX)
1131 swkey->ip.proto = ipv4_key->ipv4_proto;
1132 swkey->ip.tos = ipv4_key->ipv4_tos;
1133 swkey->ip.ttl = ipv4_key->ipv4_ttl;
1134 swkey->ip.frag = ipv4_key->ipv4_frag;
1135 swkey->ipv4.addr.src = ipv4_key->ipv4_src;
1136 swkey->ipv4.addr.dst = ipv4_key->ipv4_dst;
1138 if (swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1139 err = ipv4_flow_from_nlattrs(swkey, &key_len, a, &attrs);
1143 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1144 const struct ovs_key_ipv6 *ipv6_key;
1146 if (!(attrs & (1 << OVS_KEY_ATTR_IPV6)))
1148 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1150 key_len = SW_FLOW_KEY_OFFSET(ipv6.label);
1151 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1152 if (ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX)
1154 swkey->ipv6.label = ipv6_key->ipv6_label;
1155 swkey->ip.proto = ipv6_key->ipv6_proto;
1156 swkey->ip.tos = ipv6_key->ipv6_tclass;
1157 swkey->ip.ttl = ipv6_key->ipv6_hlimit;
1158 swkey->ip.frag = ipv6_key->ipv6_frag;
1159 memcpy(&swkey->ipv6.addr.src, ipv6_key->ipv6_src,
1160 sizeof(swkey->ipv6.addr.src));
1161 memcpy(&swkey->ipv6.addr.dst, ipv6_key->ipv6_dst,
1162 sizeof(swkey->ipv6.addr.dst));
1164 if (swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1165 err = ipv6_flow_from_nlattrs(swkey, &key_len, a, &attrs);
1169 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1170 swkey->eth.type == htons(ETH_P_RARP)) {
1171 const struct ovs_key_arp *arp_key;
1173 if (!(attrs & (1 << OVS_KEY_ATTR_ARP)))
1175 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1177 key_len = SW_FLOW_KEY_OFFSET(ipv4.arp);
1178 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1179 swkey->ipv4.addr.src = arp_key->arp_sip;
1180 swkey->ipv4.addr.dst = arp_key->arp_tip;
1181 if (arp_key->arp_op & htons(0xff00))
1183 swkey->ip.proto = ntohs(arp_key->arp_op);
1184 memcpy(swkey->ipv4.arp.sha, arp_key->arp_sha, ETH_ALEN);
1185 memcpy(swkey->ipv4.arp.tha, arp_key->arp_tha, ETH_ALEN);
1190 *key_lenp = key_len;
1196 * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
1197 * @in_port: receives the extracted input port.
1198 * @tun_id: receives the extracted tunnel ID.
1199 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1202 * This parses a series of Netlink attributes that form a flow key, which must
1203 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1204 * get the metadata, that is, the parts of the flow key that cannot be
1205 * extracted from the packet itself.
1208 int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, int key_len, const struct nlattr *attr)
1210 struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key;
1211 const struct nlattr *nla;
1215 flow->key.phy.in_port = DP_MAX_PORTS;
1216 flow->key.phy.priority = 0;
1217 flow->key.phy.skb_mark = 0;
1218 memset(tun_key, 0, sizeof(flow->key.tun_key));
1220 nla_for_each_nested(nla, attr, rem) {
1221 int type = nla_type(nla);
1223 if (type <= OVS_KEY_ATTR_MAX && ovs_key_lens[type] > 0) {
1224 if (nla_len(nla) != ovs_key_lens[type])
1228 case OVS_KEY_ATTR_PRIORITY:
1229 flow->key.phy.priority = nla_get_u32(nla);
1232 case OVS_KEY_ATTR_TUN_ID:
1233 tun_id = nla_get_be64(nla);
1235 if (tun_key->ipv4_dst) {
1236 if (!(tun_key->tun_flags & OVS_TNL_F_KEY))
1238 if (tun_key->tun_id != tun_id)
1242 tun_key->tun_id = tun_id;
1243 tun_key->tun_flags |= OVS_TNL_F_KEY;
1247 case OVS_KEY_ATTR_IPV4_TUNNEL:
1248 if (tun_key->tun_flags & OVS_TNL_F_KEY) {
1249 tun_id = tun_key->tun_id;
1251 memcpy(tun_key, nla_data(nla), sizeof(*tun_key));
1252 if (!(tun_key->tun_flags & OVS_TNL_F_KEY))
1255 if (tun_key->tun_id != tun_id)
1258 memcpy(tun_key, nla_data(nla), sizeof(*tun_key));
1260 if (!tun_key->ipv4_dst)
1264 case OVS_KEY_ATTR_IN_PORT:
1265 if (nla_get_u32(nla) >= DP_MAX_PORTS)
1267 flow->key.phy.in_port = nla_get_u32(nla);
1270 case OVS_KEY_ATTR_SKB_MARK:
1271 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER)
1272 if (nla_get_u32(nla) != 0)
1275 flow->key.phy.skb_mark = nla_get_u32(nla);
1283 flow->hash = ovs_flow_hash(&flow->key,
1284 flow_key_start(&flow->key), key_len);
1289 int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
1291 struct ovs_key_ethernet *eth_key;
1292 struct nlattr *nla, *encap;
1294 if (swkey->phy.priority &&
1295 nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, swkey->phy.priority))
1296 goto nla_put_failure;
1298 if (swkey->tun_key.ipv4_dst) {
1299 struct ovs_key_ipv4_tunnel *tun_key;
1300 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4_TUNNEL, sizeof(*tun_key));
1302 goto nla_put_failure;
1303 tun_key = nla_data(nla);
1304 memcpy(tun_key, &swkey->tun_key, sizeof(*tun_key));
1306 if ((swkey->tun_key.tun_flags & OVS_TNL_F_KEY) &&
1307 nla_put_be64(skb, OVS_KEY_ATTR_TUN_ID, swkey->tun_key.tun_id))
1308 goto nla_put_failure;
1310 if (swkey->phy.in_port != DP_MAX_PORTS &&
1311 nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, swkey->phy.in_port))
1312 goto nla_put_failure;
1314 if (swkey->phy.skb_mark &&
1315 nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, swkey->phy.skb_mark))
1316 goto nla_put_failure;
1318 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1320 goto nla_put_failure;
1321 eth_key = nla_data(nla);
1322 memcpy(eth_key->eth_src, swkey->eth.src, ETH_ALEN);
1323 memcpy(eth_key->eth_dst, swkey->eth.dst, ETH_ALEN);
1325 if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
1326 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, htons(ETH_P_8021Q)) ||
1327 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, swkey->eth.tci))
1328 goto nla_put_failure;
1329 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1330 if (!swkey->eth.tci)
1336 if (swkey->eth.type == htons(ETH_P_802_2))
1339 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, swkey->eth.type))
1340 goto nla_put_failure;
1342 if (swkey->eth.type == htons(ETH_P_IP)) {
1343 struct ovs_key_ipv4 *ipv4_key;
1345 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1347 goto nla_put_failure;
1348 ipv4_key = nla_data(nla);
1349 ipv4_key->ipv4_src = swkey->ipv4.addr.src;
1350 ipv4_key->ipv4_dst = swkey->ipv4.addr.dst;
1351 ipv4_key->ipv4_proto = swkey->ip.proto;
1352 ipv4_key->ipv4_tos = swkey->ip.tos;
1353 ipv4_key->ipv4_ttl = swkey->ip.ttl;
1354 ipv4_key->ipv4_frag = swkey->ip.frag;
1355 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1356 struct ovs_key_ipv6 *ipv6_key;
1358 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1360 goto nla_put_failure;
1361 ipv6_key = nla_data(nla);
1362 memcpy(ipv6_key->ipv6_src, &swkey->ipv6.addr.src,
1363 sizeof(ipv6_key->ipv6_src));
1364 memcpy(ipv6_key->ipv6_dst, &swkey->ipv6.addr.dst,
1365 sizeof(ipv6_key->ipv6_dst));
1366 ipv6_key->ipv6_label = swkey->ipv6.label;
1367 ipv6_key->ipv6_proto = swkey->ip.proto;
1368 ipv6_key->ipv6_tclass = swkey->ip.tos;
1369 ipv6_key->ipv6_hlimit = swkey->ip.ttl;
1370 ipv6_key->ipv6_frag = swkey->ip.frag;
1371 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1372 swkey->eth.type == htons(ETH_P_RARP)) {
1373 struct ovs_key_arp *arp_key;
1375 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1377 goto nla_put_failure;
1378 arp_key = nla_data(nla);
1379 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1380 arp_key->arp_sip = swkey->ipv4.addr.src;
1381 arp_key->arp_tip = swkey->ipv4.addr.dst;
1382 arp_key->arp_op = htons(swkey->ip.proto);
1383 memcpy(arp_key->arp_sha, swkey->ipv4.arp.sha, ETH_ALEN);
1384 memcpy(arp_key->arp_tha, swkey->ipv4.arp.tha, ETH_ALEN);
1387 if ((swkey->eth.type == htons(ETH_P_IP) ||
1388 swkey->eth.type == htons(ETH_P_IPV6)) &&
1389 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1391 if (swkey->ip.proto == IPPROTO_TCP) {
1392 struct ovs_key_tcp *tcp_key;
1394 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1396 goto nla_put_failure;
1397 tcp_key = nla_data(nla);
1398 if (swkey->eth.type == htons(ETH_P_IP)) {
1399 tcp_key->tcp_src = swkey->ipv4.tp.src;
1400 tcp_key->tcp_dst = swkey->ipv4.tp.dst;
1401 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1402 tcp_key->tcp_src = swkey->ipv6.tp.src;
1403 tcp_key->tcp_dst = swkey->ipv6.tp.dst;
1405 } else if (swkey->ip.proto == IPPROTO_UDP) {
1406 struct ovs_key_udp *udp_key;
1408 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1410 goto nla_put_failure;
1411 udp_key = nla_data(nla);
1412 if (swkey->eth.type == htons(ETH_P_IP)) {
1413 udp_key->udp_src = swkey->ipv4.tp.src;
1414 udp_key->udp_dst = swkey->ipv4.tp.dst;
1415 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1416 udp_key->udp_src = swkey->ipv6.tp.src;
1417 udp_key->udp_dst = swkey->ipv6.tp.dst;
1419 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1420 swkey->ip.proto == IPPROTO_ICMP) {
1421 struct ovs_key_icmp *icmp_key;
1423 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1425 goto nla_put_failure;
1426 icmp_key = nla_data(nla);
1427 icmp_key->icmp_type = ntohs(swkey->ipv4.tp.src);
1428 icmp_key->icmp_code = ntohs(swkey->ipv4.tp.dst);
1429 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1430 swkey->ip.proto == IPPROTO_ICMPV6) {
1431 struct ovs_key_icmpv6 *icmpv6_key;
1433 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1434 sizeof(*icmpv6_key));
1436 goto nla_put_failure;
1437 icmpv6_key = nla_data(nla);
1438 icmpv6_key->icmpv6_type = ntohs(swkey->ipv6.tp.src);
1439 icmpv6_key->icmpv6_code = ntohs(swkey->ipv6.tp.dst);
1441 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1442 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1443 struct ovs_key_nd *nd_key;
1445 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1447 goto nla_put_failure;
1448 nd_key = nla_data(nla);
1449 memcpy(nd_key->nd_target, &swkey->ipv6.nd.target,
1450 sizeof(nd_key->nd_target));
1451 memcpy(nd_key->nd_sll, swkey->ipv6.nd.sll, ETH_ALEN);
1452 memcpy(nd_key->nd_tll, swkey->ipv6.nd.tll, ETH_ALEN);
1459 nla_nest_end(skb, encap);
1467 /* Initializes the flow module.
1468 * Returns zero if successful or a negative error code. */
1469 int ovs_flow_init(void)
1471 flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0,
1473 if (flow_cache == NULL)
1479 /* Uninitializes the flow module. */
1480 void ovs_flow_exit(void)
1482 kmem_cache_destroy(flow_cache);