2 * Copyright (c) 2007-2011 Nicira Networks.
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>
35 #include <linux/if_ether.h>
37 #include <linux/ipv6.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>
45 #include <net/ndisc.h>
47 static struct kmem_cache
*flow_cache
;
49 static int check_header(struct sk_buff
*skb
, int len
)
51 if (unlikely(skb
->len
< len
))
53 if (unlikely(!pskb_may_pull(skb
, len
)))
58 static bool arphdr_ok(struct sk_buff
*skb
)
60 return pskb_may_pull(skb
, skb_network_offset(skb
) +
61 sizeof(struct arp_eth_header
));
64 static int check_iphdr(struct sk_buff
*skb
)
66 unsigned int nh_ofs
= skb_network_offset(skb
);
70 err
= check_header(skb
, nh_ofs
+ sizeof(struct iphdr
));
74 ip_len
= ip_hdrlen(skb
);
75 if (unlikely(ip_len
< sizeof(struct iphdr
) ||
76 skb
->len
< nh_ofs
+ ip_len
))
79 skb_set_transport_header(skb
, nh_ofs
+ ip_len
);
83 static bool tcphdr_ok(struct sk_buff
*skb
)
85 int th_ofs
= skb_transport_offset(skb
);
88 if (unlikely(!pskb_may_pull(skb
, th_ofs
+ sizeof(struct tcphdr
))))
91 tcp_len
= tcp_hdrlen(skb
);
92 if (unlikely(tcp_len
< sizeof(struct tcphdr
) ||
93 skb
->len
< th_ofs
+ tcp_len
))
99 static bool udphdr_ok(struct sk_buff
*skb
)
101 return pskb_may_pull(skb
, skb_transport_offset(skb
) +
102 sizeof(struct udphdr
));
105 static bool icmphdr_ok(struct sk_buff
*skb
)
107 return pskb_may_pull(skb
, skb_transport_offset(skb
) +
108 sizeof(struct icmphdr
));
111 u64
ovs_flow_used_time(unsigned long flow_jiffies
)
113 struct timespec cur_ts
;
116 ktime_get_ts(&cur_ts
);
117 idle_ms
= jiffies_to_msecs(jiffies
- flow_jiffies
);
118 cur_ms
= (u64
)cur_ts
.tv_sec
* MSEC_PER_SEC
+
119 cur_ts
.tv_nsec
/ NSEC_PER_MSEC
;
121 return cur_ms
- idle_ms
;
124 #define SW_FLOW_KEY_OFFSET(field) \
125 (offsetof(struct sw_flow_key, field) + \
126 FIELD_SIZEOF(struct sw_flow_key, field))
128 static int parse_ipv6hdr(struct sk_buff
*skb
, struct sw_flow_key
*key
,
131 unsigned int nh_ofs
= skb_network_offset(skb
);
139 *key_lenp
= SW_FLOW_KEY_OFFSET(ipv6
.label
);
141 err
= check_header(skb
, nh_ofs
+ sizeof(*nh
));
146 nexthdr
= nh
->nexthdr
;
147 payload_ofs
= (u8
*)(nh
+ 1) - skb
->data
;
149 key
->ip
.proto
= NEXTHDR_NONE
;
150 key
->ip
.tos
= ipv6_get_dsfield(nh
);
151 key
->ip
.ttl
= nh
->hop_limit
;
152 key
->ipv6
.label
= *(__be32
*)nh
& htonl(IPV6_FLOWINFO_FLOWLABEL
);
153 key
->ipv6
.addr
.src
= nh
->saddr
;
154 key
->ipv6
.addr
.dst
= nh
->daddr
;
156 payload_ofs
= ipv6_skip_exthdr(skb
, payload_ofs
, &nexthdr
, &frag_off
);
157 if (unlikely(payload_ofs
< 0))
161 if (frag_off
& htons(~0x7))
162 key
->ip
.frag
= OVS_FRAG_TYPE_LATER
;
164 key
->ip
.frag
= OVS_FRAG_TYPE_FIRST
;
167 nh_len
= payload_ofs
- nh_ofs
;
168 skb_set_transport_header(skb
, nh_ofs
+ nh_len
);
169 key
->ip
.proto
= nexthdr
;
173 static bool icmp6hdr_ok(struct sk_buff
*skb
)
175 return pskb_may_pull(skb
, skb_transport_offset(skb
) +
176 sizeof(struct icmp6hdr
));
179 #define TCP_FLAGS_OFFSET 13
180 #define TCP_FLAG_MASK 0x3f
182 void ovs_flow_used(struct sw_flow
*flow
, struct sk_buff
*skb
)
186 if (flow
->key
.eth
.type
== htons(ETH_P_IP
) &&
187 flow
->key
.ip
.proto
== IPPROTO_TCP
) {
188 u8
*tcp
= (u8
*)tcp_hdr(skb
);
189 tcp_flags
= *(tcp
+ TCP_FLAGS_OFFSET
) & TCP_FLAG_MASK
;
192 spin_lock(&flow
->lock
);
193 flow
->used
= jiffies
;
194 flow
->packet_count
++;
195 flow
->byte_count
+= skb
->len
;
196 flow
->tcp_flags
|= tcp_flags
;
197 spin_unlock(&flow
->lock
);
200 struct sw_flow_actions
*ovs_flow_actions_alloc(const struct nlattr
*actions
)
202 int actions_len
= nla_len(actions
);
203 struct sw_flow_actions
*sfa
;
205 /* At least DP_MAX_PORTS actions are required to be able to flood a
206 * packet to every port. Factor of 2 allows for setting VLAN tags,
208 if (actions_len
> 2 * DP_MAX_PORTS
* nla_total_size(4))
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_table_copy_flows(struct flow_table
*old
, struct flow_table
*new)
365 old_ver
= old
->node_ver
;
366 new->node_ver
= !old_ver
;
368 /* Insert in new table. */
369 for (i
= 0; i
< old
->n_buckets
; i
++) {
370 struct sw_flow
*flow
;
371 struct hlist_head
*head
;
372 struct hlist_node
*n
;
374 head
= flex_array_get(old
->buckets
, i
);
376 hlist_for_each_entry(flow
, n
, head
, hash_node
[old_ver
])
377 ovs_flow_tbl_insert(new, flow
);
379 old
->keep_flows
= true;
382 static struct flow_table
*__flow_tbl_rehash(struct flow_table
*table
, int n_buckets
)
384 struct flow_table
*new_table
;
386 new_table
= ovs_flow_tbl_alloc(n_buckets
);
388 return ERR_PTR(-ENOMEM
);
390 flow_table_copy_flows(table
, new_table
);
395 struct flow_table
*ovs_flow_tbl_rehash(struct flow_table
*table
)
397 return __flow_tbl_rehash(table
, table
->n_buckets
);
400 struct flow_table
*ovs_flow_tbl_expand(struct flow_table
*table
)
402 return __flow_tbl_rehash(table
, table
->n_buckets
* 2);
405 void ovs_flow_free(struct sw_flow
*flow
)
410 kfree((struct sf_flow_acts __force
*)flow
->sf_acts
);
411 kmem_cache_free(flow_cache
, flow
);
414 /* RCU callback used by ovs_flow_deferred_free. */
415 static void rcu_free_flow_callback(struct rcu_head
*rcu
)
417 struct sw_flow
*flow
= container_of(rcu
, struct sw_flow
, rcu
);
422 /* Schedules 'flow' to be freed after the next RCU grace period.
423 * The caller must hold rcu_read_lock for this to be sensible. */
424 void ovs_flow_deferred_free(struct sw_flow
*flow
)
426 call_rcu(&flow
->rcu
, rcu_free_flow_callback
);
429 /* RCU callback used by ovs_flow_deferred_free_acts. */
430 static void rcu_free_acts_callback(struct rcu_head
*rcu
)
432 struct sw_flow_actions
*sf_acts
= container_of(rcu
,
433 struct sw_flow_actions
, rcu
);
437 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
438 * The caller must hold rcu_read_lock for this to be sensible. */
439 void ovs_flow_deferred_free_acts(struct sw_flow_actions
*sf_acts
)
441 call_rcu(&sf_acts
->rcu
, rcu_free_acts_callback
);
444 static int parse_vlan(struct sk_buff
*skb
, struct sw_flow_key
*key
)
447 __be16 eth_type
; /* ETH_P_8021Q */
450 struct qtag_prefix
*qp
;
452 if (unlikely(skb
->len
< sizeof(struct qtag_prefix
) + sizeof(__be16
)))
455 if (unlikely(!pskb_may_pull(skb
, sizeof(struct qtag_prefix
) +
459 qp
= (struct qtag_prefix
*) skb
->data
;
460 key
->eth
.tci
= qp
->tci
| htons(VLAN_TAG_PRESENT
);
461 __skb_pull(skb
, sizeof(struct qtag_prefix
));
466 static __be16
parse_ethertype(struct sk_buff
*skb
)
468 struct llc_snap_hdr
{
469 u8 dsap
; /* Always 0xAA */
470 u8 ssap
; /* Always 0xAA */
475 struct llc_snap_hdr
*llc
;
478 proto
= *(__be16
*) skb
->data
;
479 __skb_pull(skb
, sizeof(__be16
));
481 if (ntohs(proto
) >= 1536)
484 if (skb
->len
< sizeof(struct llc_snap_hdr
))
485 return htons(ETH_P_802_2
);
487 if (unlikely(!pskb_may_pull(skb
, sizeof(struct llc_snap_hdr
))))
490 llc
= (struct llc_snap_hdr
*) skb
->data
;
491 if (llc
->dsap
!= LLC_SAP_SNAP
||
492 llc
->ssap
!= LLC_SAP_SNAP
||
493 (llc
->oui
[0] | llc
->oui
[1] | llc
->oui
[2]) != 0)
494 return htons(ETH_P_802_2
);
496 __skb_pull(skb
, sizeof(struct llc_snap_hdr
));
497 return llc
->ethertype
;
500 static int parse_icmpv6(struct sk_buff
*skb
, struct sw_flow_key
*key
,
501 int *key_lenp
, int nh_len
)
503 struct icmp6hdr
*icmp
= icmp6_hdr(skb
);
507 /* The ICMPv6 type and code fields use the 16-bit transport port
508 * fields, so we need to store them in 16-bit network byte order.
510 key
->ipv6
.tp
.src
= htons(icmp
->icmp6_type
);
511 key
->ipv6
.tp
.dst
= htons(icmp
->icmp6_code
);
512 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
514 if (icmp
->icmp6_code
== 0 &&
515 (icmp
->icmp6_type
== NDISC_NEIGHBOUR_SOLICITATION
||
516 icmp
->icmp6_type
== NDISC_NEIGHBOUR_ADVERTISEMENT
)) {
517 int icmp_len
= skb
->len
- skb_transport_offset(skb
);
521 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.nd
);
523 /* In order to process neighbor discovery options, we need the
526 if (unlikely(icmp_len
< sizeof(*nd
)))
528 if (unlikely(skb_linearize(skb
))) {
533 nd
= (struct nd_msg
*)skb_transport_header(skb
);
534 key
->ipv6
.nd
.target
= nd
->target
;
535 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.nd
);
537 icmp_len
-= sizeof(*nd
);
539 while (icmp_len
>= 8) {
540 struct nd_opt_hdr
*nd_opt
=
541 (struct nd_opt_hdr
*)(nd
->opt
+ offset
);
542 int opt_len
= nd_opt
->nd_opt_len
* 8;
544 if (unlikely(!opt_len
|| opt_len
> icmp_len
))
547 /* Store the link layer address if the appropriate
548 * option is provided. It is considered an error if
549 * the same link layer option is specified twice.
551 if (nd_opt
->nd_opt_type
== ND_OPT_SOURCE_LL_ADDR
553 if (unlikely(!is_zero_ether_addr(key
->ipv6
.nd
.sll
)))
555 memcpy(key
->ipv6
.nd
.sll
,
556 &nd
->opt
[offset
+sizeof(*nd_opt
)], ETH_ALEN
);
557 } else if (nd_opt
->nd_opt_type
== ND_OPT_TARGET_LL_ADDR
559 if (unlikely(!is_zero_ether_addr(key
->ipv6
.nd
.tll
)))
561 memcpy(key
->ipv6
.nd
.tll
,
562 &nd
->opt
[offset
+sizeof(*nd_opt
)], ETH_ALEN
);
573 memset(&key
->ipv6
.nd
.target
, 0, sizeof(key
->ipv6
.nd
.target
));
574 memset(key
->ipv6
.nd
.sll
, 0, sizeof(key
->ipv6
.nd
.sll
));
575 memset(key
->ipv6
.nd
.tll
, 0, sizeof(key
->ipv6
.nd
.tll
));
583 * ovs_flow_extract - extracts a flow key from an Ethernet frame.
584 * @skb: sk_buff that contains the frame, with skb->data pointing to the
586 * @in_port: port number on which @skb was received.
587 * @key: output flow key
588 * @key_lenp: length of output flow key
590 * The caller must ensure that skb->len >= ETH_HLEN.
592 * Returns 0 if successful, otherwise a negative errno value.
594 * Initializes @skb header pointers as follows:
596 * - skb->mac_header: the Ethernet header.
598 * - skb->network_header: just past the Ethernet header, or just past the
599 * VLAN header, to the first byte of the Ethernet payload.
601 * - skb->transport_header: If key->dl_type is ETH_P_IP or ETH_P_IPV6
602 * on output, then just past the IP header, if one is present and
603 * of a correct length, otherwise the same as skb->network_header.
604 * For other key->dl_type values it is left untouched.
606 int ovs_flow_extract(struct sk_buff
*skb
, u16 in_port
, struct sw_flow_key
*key
,
610 int key_len
= SW_FLOW_KEY_OFFSET(eth
);
613 memset(key
, 0, sizeof(*key
));
615 key
->phy
.priority
= skb
->priority
;
616 key
->phy
.in_port
= in_port
;
618 skb_reset_mac_header(skb
);
620 /* Link layer. We are guaranteed to have at least the 14 byte Ethernet
621 * header in the linear data area.
624 memcpy(key
->eth
.src
, eth
->h_source
, ETH_ALEN
);
625 memcpy(key
->eth
.dst
, eth
->h_dest
, ETH_ALEN
);
627 __skb_pull(skb
, 2 * ETH_ALEN
);
629 if (vlan_tx_tag_present(skb
))
630 key
->eth
.tci
= htons(skb
->vlan_tci
);
631 else if (eth
->h_proto
== htons(ETH_P_8021Q
))
632 if (unlikely(parse_vlan(skb
, key
)))
635 key
->eth
.type
= parse_ethertype(skb
);
636 if (unlikely(key
->eth
.type
== htons(0)))
639 skb_reset_network_header(skb
);
640 __skb_push(skb
, skb
->data
- skb_mac_header(skb
));
643 if (key
->eth
.type
== htons(ETH_P_IP
)) {
647 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.addr
);
649 error
= check_iphdr(skb
);
650 if (unlikely(error
)) {
651 if (error
== -EINVAL
) {
652 skb
->transport_header
= skb
->network_header
;
659 key
->ipv4
.addr
.src
= nh
->saddr
;
660 key
->ipv4
.addr
.dst
= nh
->daddr
;
662 key
->ip
.proto
= nh
->protocol
;
663 key
->ip
.tos
= nh
->tos
;
664 key
->ip
.ttl
= nh
->ttl
;
666 offset
= nh
->frag_off
& htons(IP_OFFSET
);
668 key
->ip
.frag
= OVS_FRAG_TYPE_LATER
;
671 if (nh
->frag_off
& htons(IP_MF
) ||
672 skb_shinfo(skb
)->gso_type
& SKB_GSO_UDP
)
673 key
->ip
.frag
= OVS_FRAG_TYPE_FIRST
;
675 /* Transport layer. */
676 if (key
->ip
.proto
== IPPROTO_TCP
) {
677 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
678 if (tcphdr_ok(skb
)) {
679 struct tcphdr
*tcp
= tcp_hdr(skb
);
680 key
->ipv4
.tp
.src
= tcp
->source
;
681 key
->ipv4
.tp
.dst
= tcp
->dest
;
683 } else if (key
->ip
.proto
== IPPROTO_UDP
) {
684 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
685 if (udphdr_ok(skb
)) {
686 struct udphdr
*udp
= udp_hdr(skb
);
687 key
->ipv4
.tp
.src
= udp
->source
;
688 key
->ipv4
.tp
.dst
= udp
->dest
;
690 } else if (key
->ip
.proto
== IPPROTO_ICMP
) {
691 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
692 if (icmphdr_ok(skb
)) {
693 struct icmphdr
*icmp
= icmp_hdr(skb
);
694 /* The ICMP type and code fields use the 16-bit
695 * transport port fields, so we need to store
696 * them in 16-bit network byte order. */
697 key
->ipv4
.tp
.src
= htons(icmp
->type
);
698 key
->ipv4
.tp
.dst
= htons(icmp
->code
);
702 } else if (key
->eth
.type
== htons(ETH_P_ARP
) && arphdr_ok(skb
)) {
703 struct arp_eth_header
*arp
;
705 arp
= (struct arp_eth_header
*)skb_network_header(skb
);
707 if (arp
->ar_hrd
== htons(ARPHRD_ETHER
)
708 && arp
->ar_pro
== htons(ETH_P_IP
)
709 && arp
->ar_hln
== ETH_ALEN
710 && arp
->ar_pln
== 4) {
712 /* We only match on the lower 8 bits of the opcode. */
713 if (ntohs(arp
->ar_op
) <= 0xff)
714 key
->ip
.proto
= ntohs(arp
->ar_op
);
716 if (key
->ip
.proto
== ARPOP_REQUEST
717 || key
->ip
.proto
== ARPOP_REPLY
) {
718 memcpy(&key
->ipv4
.addr
.src
, arp
->ar_sip
, sizeof(key
->ipv4
.addr
.src
));
719 memcpy(&key
->ipv4
.addr
.dst
, arp
->ar_tip
, sizeof(key
->ipv4
.addr
.dst
));
720 memcpy(key
->ipv4
.arp
.sha
, arp
->ar_sha
, ETH_ALEN
);
721 memcpy(key
->ipv4
.arp
.tha
, arp
->ar_tha
, ETH_ALEN
);
722 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.arp
);
725 } else if (key
->eth
.type
== htons(ETH_P_IPV6
)) {
726 int nh_len
; /* IPv6 Header + Extensions */
728 nh_len
= parse_ipv6hdr(skb
, key
, &key_len
);
729 if (unlikely(nh_len
< 0)) {
730 if (nh_len
== -EINVAL
)
731 skb
->transport_header
= skb
->network_header
;
737 if (key
->ip
.frag
== OVS_FRAG_TYPE_LATER
)
739 if (skb_shinfo(skb
)->gso_type
& SKB_GSO_UDP
)
740 key
->ip
.frag
= OVS_FRAG_TYPE_FIRST
;
742 /* Transport layer. */
743 if (key
->ip
.proto
== NEXTHDR_TCP
) {
744 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
745 if (tcphdr_ok(skb
)) {
746 struct tcphdr
*tcp
= tcp_hdr(skb
);
747 key
->ipv6
.tp
.src
= tcp
->source
;
748 key
->ipv6
.tp
.dst
= tcp
->dest
;
750 } else if (key
->ip
.proto
== NEXTHDR_UDP
) {
751 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
752 if (udphdr_ok(skb
)) {
753 struct udphdr
*udp
= udp_hdr(skb
);
754 key
->ipv6
.tp
.src
= udp
->source
;
755 key
->ipv6
.tp
.dst
= udp
->dest
;
757 } else if (key
->ip
.proto
== NEXTHDR_ICMP
) {
758 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
759 if (icmp6hdr_ok(skb
)) {
760 error
= parse_icmpv6(skb
, key
, &key_len
, nh_len
);
772 u32
ovs_flow_hash(const struct sw_flow_key
*key
, int key_len
)
774 return jhash2((u32
*)key
, DIV_ROUND_UP(key_len
, sizeof(u32
)), 0);
777 struct sw_flow
*ovs_flow_tbl_lookup(struct flow_table
*table
,
778 struct sw_flow_key
*key
, int key_len
)
780 struct sw_flow
*flow
;
781 struct hlist_node
*n
;
782 struct hlist_head
*head
;
785 hash
= ovs_flow_hash(key
, key_len
);
787 head
= find_bucket(table
, hash
);
788 hlist_for_each_entry_rcu(flow
, n
, head
, hash_node
[table
->node_ver
]) {
790 if (flow
->hash
== hash
&&
791 !memcmp(&flow
->key
, key
, key_len
)) {
798 void ovs_flow_tbl_insert(struct flow_table
*table
, struct sw_flow
*flow
)
800 struct hlist_head
*head
;
802 head
= find_bucket(table
, flow
->hash
);
803 hlist_add_head_rcu(&flow
->hash_node
[table
->node_ver
], head
);
807 void ovs_flow_tbl_remove(struct flow_table
*table
, struct sw_flow
*flow
)
809 hlist_del_rcu(&flow
->hash_node
[table
->node_ver
]);
811 BUG_ON(table
->count
< 0);
814 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
815 const int ovs_key_lens
[OVS_KEY_ATTR_MAX
+ 1] = {
816 [OVS_KEY_ATTR_ENCAP
] = -1,
817 [OVS_KEY_ATTR_PRIORITY
] = sizeof(u32
),
818 [OVS_KEY_ATTR_IN_PORT
] = sizeof(u32
),
819 [OVS_KEY_ATTR_ETHERNET
] = sizeof(struct ovs_key_ethernet
),
820 [OVS_KEY_ATTR_VLAN
] = sizeof(__be16
),
821 [OVS_KEY_ATTR_ETHERTYPE
] = sizeof(__be16
),
822 [OVS_KEY_ATTR_IPV4
] = sizeof(struct ovs_key_ipv4
),
823 [OVS_KEY_ATTR_IPV6
] = sizeof(struct ovs_key_ipv6
),
824 [OVS_KEY_ATTR_TCP
] = sizeof(struct ovs_key_tcp
),
825 [OVS_KEY_ATTR_UDP
] = sizeof(struct ovs_key_udp
),
826 [OVS_KEY_ATTR_ICMP
] = sizeof(struct ovs_key_icmp
),
827 [OVS_KEY_ATTR_ICMPV6
] = sizeof(struct ovs_key_icmpv6
),
828 [OVS_KEY_ATTR_ARP
] = sizeof(struct ovs_key_arp
),
829 [OVS_KEY_ATTR_ND
] = sizeof(struct ovs_key_nd
),
832 static int ipv4_flow_from_nlattrs(struct sw_flow_key
*swkey
, int *key_len
,
833 const struct nlattr
*a
[], u32
*attrs
)
835 const struct ovs_key_icmp
*icmp_key
;
836 const struct ovs_key_tcp
*tcp_key
;
837 const struct ovs_key_udp
*udp_key
;
839 switch (swkey
->ip
.proto
) {
841 if (!(*attrs
& (1 << OVS_KEY_ATTR_TCP
)))
843 *attrs
&= ~(1 << OVS_KEY_ATTR_TCP
);
845 *key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
846 tcp_key
= nla_data(a
[OVS_KEY_ATTR_TCP
]);
847 swkey
->ipv4
.tp
.src
= tcp_key
->tcp_src
;
848 swkey
->ipv4
.tp
.dst
= tcp_key
->tcp_dst
;
852 if (!(*attrs
& (1 << OVS_KEY_ATTR_UDP
)))
854 *attrs
&= ~(1 << OVS_KEY_ATTR_UDP
);
856 *key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
857 udp_key
= nla_data(a
[OVS_KEY_ATTR_UDP
]);
858 swkey
->ipv4
.tp
.src
= udp_key
->udp_src
;
859 swkey
->ipv4
.tp
.dst
= udp_key
->udp_dst
;
863 if (!(*attrs
& (1 << OVS_KEY_ATTR_ICMP
)))
865 *attrs
&= ~(1 << OVS_KEY_ATTR_ICMP
);
867 *key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
868 icmp_key
= nla_data(a
[OVS_KEY_ATTR_ICMP
]);
869 swkey
->ipv4
.tp
.src
= htons(icmp_key
->icmp_type
);
870 swkey
->ipv4
.tp
.dst
= htons(icmp_key
->icmp_code
);
877 static int ipv6_flow_from_nlattrs(struct sw_flow_key
*swkey
, int *key_len
,
878 const struct nlattr
*a
[], u32
*attrs
)
880 const struct ovs_key_icmpv6
*icmpv6_key
;
881 const struct ovs_key_tcp
*tcp_key
;
882 const struct ovs_key_udp
*udp_key
;
884 switch (swkey
->ip
.proto
) {
886 if (!(*attrs
& (1 << OVS_KEY_ATTR_TCP
)))
888 *attrs
&= ~(1 << OVS_KEY_ATTR_TCP
);
890 *key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
891 tcp_key
= nla_data(a
[OVS_KEY_ATTR_TCP
]);
892 swkey
->ipv6
.tp
.src
= tcp_key
->tcp_src
;
893 swkey
->ipv6
.tp
.dst
= tcp_key
->tcp_dst
;
897 if (!(*attrs
& (1 << OVS_KEY_ATTR_UDP
)))
899 *attrs
&= ~(1 << OVS_KEY_ATTR_UDP
);
901 *key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
902 udp_key
= nla_data(a
[OVS_KEY_ATTR_UDP
]);
903 swkey
->ipv6
.tp
.src
= udp_key
->udp_src
;
904 swkey
->ipv6
.tp
.dst
= udp_key
->udp_dst
;
908 if (!(*attrs
& (1 << OVS_KEY_ATTR_ICMPV6
)))
910 *attrs
&= ~(1 << OVS_KEY_ATTR_ICMPV6
);
912 *key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
913 icmpv6_key
= nla_data(a
[OVS_KEY_ATTR_ICMPV6
]);
914 swkey
->ipv6
.tp
.src
= htons(icmpv6_key
->icmpv6_type
);
915 swkey
->ipv6
.tp
.dst
= htons(icmpv6_key
->icmpv6_code
);
917 if (swkey
->ipv6
.tp
.src
== htons(NDISC_NEIGHBOUR_SOLICITATION
) ||
918 swkey
->ipv6
.tp
.src
== htons(NDISC_NEIGHBOUR_ADVERTISEMENT
)) {
919 const struct ovs_key_nd
*nd_key
;
921 if (!(*attrs
& (1 << OVS_KEY_ATTR_ND
)))
923 *attrs
&= ~(1 << OVS_KEY_ATTR_ND
);
925 *key_len
= SW_FLOW_KEY_OFFSET(ipv6
.nd
);
926 nd_key
= nla_data(a
[OVS_KEY_ATTR_ND
]);
927 memcpy(&swkey
->ipv6
.nd
.target
, nd_key
->nd_target
,
928 sizeof(swkey
->ipv6
.nd
.target
));
929 memcpy(swkey
->ipv6
.nd
.sll
, nd_key
->nd_sll
, ETH_ALEN
);
930 memcpy(swkey
->ipv6
.nd
.tll
, nd_key
->nd_tll
, ETH_ALEN
);
938 static int parse_flow_nlattrs(const struct nlattr
*attr
,
939 const struct nlattr
*a
[], u32
*attrsp
)
941 const struct nlattr
*nla
;
946 nla_for_each_nested(nla
, attr
, rem
) {
947 u16 type
= nla_type(nla
);
950 if (type
> OVS_KEY_ATTR_MAX
|| attrs
& (1 << type
))
953 expected_len
= ovs_key_lens
[type
];
954 if (nla_len(nla
) != expected_len
&& expected_len
!= -1)
968 * ovs_flow_from_nlattrs - parses Netlink attributes into a flow key.
969 * @swkey: receives the extracted flow key.
970 * @key_lenp: number of bytes used in @swkey.
971 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
974 int ovs_flow_from_nlattrs(struct sw_flow_key
*swkey
, int *key_lenp
,
975 const struct nlattr
*attr
)
977 const struct nlattr
*a
[OVS_KEY_ATTR_MAX
+ 1];
978 const struct ovs_key_ethernet
*eth_key
;
983 memset(swkey
, 0, sizeof(struct sw_flow_key
));
984 key_len
= SW_FLOW_KEY_OFFSET(eth
);
986 err
= parse_flow_nlattrs(attr
, a
, &attrs
);
990 /* Metadata attributes. */
991 if (attrs
& (1 << OVS_KEY_ATTR_PRIORITY
)) {
992 swkey
->phy
.priority
= nla_get_u32(a
[OVS_KEY_ATTR_PRIORITY
]);
993 attrs
&= ~(1 << OVS_KEY_ATTR_PRIORITY
);
995 if (attrs
& (1 << OVS_KEY_ATTR_IN_PORT
)) {
996 u32 in_port
= nla_get_u32(a
[OVS_KEY_ATTR_IN_PORT
]);
997 if (in_port
>= DP_MAX_PORTS
)
999 swkey
->phy
.in_port
= in_port
;
1000 attrs
&= ~(1 << OVS_KEY_ATTR_IN_PORT
);
1002 swkey
->phy
.in_port
= USHRT_MAX
;
1005 /* Data attributes. */
1006 if (!(attrs
& (1 << OVS_KEY_ATTR_ETHERNET
)))
1008 attrs
&= ~(1 << OVS_KEY_ATTR_ETHERNET
);
1010 eth_key
= nla_data(a
[OVS_KEY_ATTR_ETHERNET
]);
1011 memcpy(swkey
->eth
.src
, eth_key
->eth_src
, ETH_ALEN
);
1012 memcpy(swkey
->eth
.dst
, eth_key
->eth_dst
, ETH_ALEN
);
1014 if (attrs
& (1u << OVS_KEY_ATTR_ETHERTYPE
) &&
1015 nla_get_be16(a
[OVS_KEY_ATTR_ETHERTYPE
]) == htons(ETH_P_8021Q
)) {
1016 const struct nlattr
*encap
;
1019 if (attrs
!= ((1 << OVS_KEY_ATTR_VLAN
) |
1020 (1 << OVS_KEY_ATTR_ETHERTYPE
) |
1021 (1 << OVS_KEY_ATTR_ENCAP
)))
1024 encap
= a
[OVS_KEY_ATTR_ENCAP
];
1025 tci
= nla_get_be16(a
[OVS_KEY_ATTR_VLAN
]);
1026 if (tci
& htons(VLAN_TAG_PRESENT
)) {
1027 swkey
->eth
.tci
= tci
;
1029 err
= parse_flow_nlattrs(encap
, a
, &attrs
);
1033 /* Corner case for truncated 802.1Q header. */
1037 swkey
->eth
.type
= htons(ETH_P_8021Q
);
1038 *key_lenp
= key_len
;
1045 if (attrs
& (1 << OVS_KEY_ATTR_ETHERTYPE
)) {
1046 swkey
->eth
.type
= nla_get_be16(a
[OVS_KEY_ATTR_ETHERTYPE
]);
1047 if (ntohs(swkey
->eth
.type
) < 1536)
1049 attrs
&= ~(1 << OVS_KEY_ATTR_ETHERTYPE
);
1051 swkey
->eth
.type
= htons(ETH_P_802_2
);
1054 if (swkey
->eth
.type
== htons(ETH_P_IP
)) {
1055 const struct ovs_key_ipv4
*ipv4_key
;
1057 if (!(attrs
& (1 << OVS_KEY_ATTR_IPV4
)))
1059 attrs
&= ~(1 << OVS_KEY_ATTR_IPV4
);
1061 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.addr
);
1062 ipv4_key
= nla_data(a
[OVS_KEY_ATTR_IPV4
]);
1063 if (ipv4_key
->ipv4_frag
> OVS_FRAG_TYPE_MAX
)
1065 swkey
->ip
.proto
= ipv4_key
->ipv4_proto
;
1066 swkey
->ip
.tos
= ipv4_key
->ipv4_tos
;
1067 swkey
->ip
.ttl
= ipv4_key
->ipv4_ttl
;
1068 swkey
->ip
.frag
= ipv4_key
->ipv4_frag
;
1069 swkey
->ipv4
.addr
.src
= ipv4_key
->ipv4_src
;
1070 swkey
->ipv4
.addr
.dst
= ipv4_key
->ipv4_dst
;
1072 if (swkey
->ip
.frag
!= OVS_FRAG_TYPE_LATER
) {
1073 err
= ipv4_flow_from_nlattrs(swkey
, &key_len
, a
, &attrs
);
1077 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
)) {
1078 const struct ovs_key_ipv6
*ipv6_key
;
1080 if (!(attrs
& (1 << OVS_KEY_ATTR_IPV6
)))
1082 attrs
&= ~(1 << OVS_KEY_ATTR_IPV6
);
1084 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.label
);
1085 ipv6_key
= nla_data(a
[OVS_KEY_ATTR_IPV6
]);
1086 if (ipv6_key
->ipv6_frag
> OVS_FRAG_TYPE_MAX
)
1088 swkey
->ipv6
.label
= ipv6_key
->ipv6_label
;
1089 swkey
->ip
.proto
= ipv6_key
->ipv6_proto
;
1090 swkey
->ip
.tos
= ipv6_key
->ipv6_tclass
;
1091 swkey
->ip
.ttl
= ipv6_key
->ipv6_hlimit
;
1092 swkey
->ip
.frag
= ipv6_key
->ipv6_frag
;
1093 memcpy(&swkey
->ipv6
.addr
.src
, ipv6_key
->ipv6_src
,
1094 sizeof(swkey
->ipv6
.addr
.src
));
1095 memcpy(&swkey
->ipv6
.addr
.dst
, ipv6_key
->ipv6_dst
,
1096 sizeof(swkey
->ipv6
.addr
.dst
));
1098 if (swkey
->ip
.frag
!= OVS_FRAG_TYPE_LATER
) {
1099 err
= ipv6_flow_from_nlattrs(swkey
, &key_len
, a
, &attrs
);
1103 } else if (swkey
->eth
.type
== htons(ETH_P_ARP
)) {
1104 const struct ovs_key_arp
*arp_key
;
1106 if (!(attrs
& (1 << OVS_KEY_ATTR_ARP
)))
1108 attrs
&= ~(1 << OVS_KEY_ATTR_ARP
);
1110 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.arp
);
1111 arp_key
= nla_data(a
[OVS_KEY_ATTR_ARP
]);
1112 swkey
->ipv4
.addr
.src
= arp_key
->arp_sip
;
1113 swkey
->ipv4
.addr
.dst
= arp_key
->arp_tip
;
1114 if (arp_key
->arp_op
& htons(0xff00))
1116 swkey
->ip
.proto
= ntohs(arp_key
->arp_op
);
1117 memcpy(swkey
->ipv4
.arp
.sha
, arp_key
->arp_sha
, ETH_ALEN
);
1118 memcpy(swkey
->ipv4
.arp
.tha
, arp_key
->arp_tha
, ETH_ALEN
);
1123 *key_lenp
= key_len
;
1129 * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
1130 * @in_port: receives the extracted input port.
1131 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1134 * This parses a series of Netlink attributes that form a flow key, which must
1135 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1136 * get the metadata, that is, the parts of the flow key that cannot be
1137 * extracted from the packet itself.
1139 int ovs_flow_metadata_from_nlattrs(u32
*priority
, u16
*in_port
,
1140 const struct nlattr
*attr
)
1142 const struct nlattr
*nla
;
1145 *in_port
= USHRT_MAX
;
1148 nla_for_each_nested(nla
, attr
, rem
) {
1149 int type
= nla_type(nla
);
1151 if (type
<= OVS_KEY_ATTR_MAX
&& ovs_key_lens
[type
] > 0) {
1152 if (nla_len(nla
) != ovs_key_lens
[type
])
1156 case OVS_KEY_ATTR_PRIORITY
:
1157 *priority
= nla_get_u32(nla
);
1160 case OVS_KEY_ATTR_IN_PORT
:
1161 if (nla_get_u32(nla
) >= DP_MAX_PORTS
)
1163 *in_port
= nla_get_u32(nla
);
1173 int ovs_flow_to_nlattrs(const struct sw_flow_key
*swkey
, struct sk_buff
*skb
)
1175 struct ovs_key_ethernet
*eth_key
;
1176 struct nlattr
*nla
, *encap
;
1178 if (swkey
->phy
.priority
)
1179 NLA_PUT_U32(skb
, OVS_KEY_ATTR_PRIORITY
, swkey
->phy
.priority
);
1181 if (swkey
->phy
.in_port
!= USHRT_MAX
)
1182 NLA_PUT_U32(skb
, OVS_KEY_ATTR_IN_PORT
, swkey
->phy
.in_port
);
1184 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ETHERNET
, sizeof(*eth_key
));
1186 goto nla_put_failure
;
1187 eth_key
= nla_data(nla
);
1188 memcpy(eth_key
->eth_src
, swkey
->eth
.src
, ETH_ALEN
);
1189 memcpy(eth_key
->eth_dst
, swkey
->eth
.dst
, ETH_ALEN
);
1191 if (swkey
->eth
.tci
|| swkey
->eth
.type
== htons(ETH_P_8021Q
)) {
1192 NLA_PUT_BE16(skb
, OVS_KEY_ATTR_ETHERTYPE
, htons(ETH_P_8021Q
));
1193 NLA_PUT_BE16(skb
, OVS_KEY_ATTR_VLAN
, swkey
->eth
.tci
);
1194 encap
= nla_nest_start(skb
, OVS_KEY_ATTR_ENCAP
);
1195 if (!swkey
->eth
.tci
)
1201 if (swkey
->eth
.type
== htons(ETH_P_802_2
))
1204 NLA_PUT_BE16(skb
, OVS_KEY_ATTR_ETHERTYPE
, swkey
->eth
.type
);
1206 if (swkey
->eth
.type
== htons(ETH_P_IP
)) {
1207 struct ovs_key_ipv4
*ipv4_key
;
1209 nla
= nla_reserve(skb
, OVS_KEY_ATTR_IPV4
, sizeof(*ipv4_key
));
1211 goto nla_put_failure
;
1212 ipv4_key
= nla_data(nla
);
1213 ipv4_key
->ipv4_src
= swkey
->ipv4
.addr
.src
;
1214 ipv4_key
->ipv4_dst
= swkey
->ipv4
.addr
.dst
;
1215 ipv4_key
->ipv4_proto
= swkey
->ip
.proto
;
1216 ipv4_key
->ipv4_tos
= swkey
->ip
.tos
;
1217 ipv4_key
->ipv4_ttl
= swkey
->ip
.ttl
;
1218 ipv4_key
->ipv4_frag
= swkey
->ip
.frag
;
1219 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
)) {
1220 struct ovs_key_ipv6
*ipv6_key
;
1222 nla
= nla_reserve(skb
, OVS_KEY_ATTR_IPV6
, sizeof(*ipv6_key
));
1224 goto nla_put_failure
;
1225 ipv6_key
= nla_data(nla
);
1226 memcpy(ipv6_key
->ipv6_src
, &swkey
->ipv6
.addr
.src
,
1227 sizeof(ipv6_key
->ipv6_src
));
1228 memcpy(ipv6_key
->ipv6_dst
, &swkey
->ipv6
.addr
.dst
,
1229 sizeof(ipv6_key
->ipv6_dst
));
1230 ipv6_key
->ipv6_label
= swkey
->ipv6
.label
;
1231 ipv6_key
->ipv6_proto
= swkey
->ip
.proto
;
1232 ipv6_key
->ipv6_tclass
= swkey
->ip
.tos
;
1233 ipv6_key
->ipv6_hlimit
= swkey
->ip
.ttl
;
1234 ipv6_key
->ipv6_frag
= swkey
->ip
.frag
;
1235 } else if (swkey
->eth
.type
== htons(ETH_P_ARP
)) {
1236 struct ovs_key_arp
*arp_key
;
1238 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ARP
, sizeof(*arp_key
));
1240 goto nla_put_failure
;
1241 arp_key
= nla_data(nla
);
1242 memset(arp_key
, 0, sizeof(struct ovs_key_arp
));
1243 arp_key
->arp_sip
= swkey
->ipv4
.addr
.src
;
1244 arp_key
->arp_tip
= swkey
->ipv4
.addr
.dst
;
1245 arp_key
->arp_op
= htons(swkey
->ip
.proto
);
1246 memcpy(arp_key
->arp_sha
, swkey
->ipv4
.arp
.sha
, ETH_ALEN
);
1247 memcpy(arp_key
->arp_tha
, swkey
->ipv4
.arp
.tha
, ETH_ALEN
);
1250 if ((swkey
->eth
.type
== htons(ETH_P_IP
) ||
1251 swkey
->eth
.type
== htons(ETH_P_IPV6
)) &&
1252 swkey
->ip
.frag
!= OVS_FRAG_TYPE_LATER
) {
1254 if (swkey
->ip
.proto
== IPPROTO_TCP
) {
1255 struct ovs_key_tcp
*tcp_key
;
1257 nla
= nla_reserve(skb
, OVS_KEY_ATTR_TCP
, sizeof(*tcp_key
));
1259 goto nla_put_failure
;
1260 tcp_key
= nla_data(nla
);
1261 if (swkey
->eth
.type
== htons(ETH_P_IP
)) {
1262 tcp_key
->tcp_src
= swkey
->ipv4
.tp
.src
;
1263 tcp_key
->tcp_dst
= swkey
->ipv4
.tp
.dst
;
1264 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
)) {
1265 tcp_key
->tcp_src
= swkey
->ipv6
.tp
.src
;
1266 tcp_key
->tcp_dst
= swkey
->ipv6
.tp
.dst
;
1268 } else if (swkey
->ip
.proto
== IPPROTO_UDP
) {
1269 struct ovs_key_udp
*udp_key
;
1271 nla
= nla_reserve(skb
, OVS_KEY_ATTR_UDP
, sizeof(*udp_key
));
1273 goto nla_put_failure
;
1274 udp_key
= nla_data(nla
);
1275 if (swkey
->eth
.type
== htons(ETH_P_IP
)) {
1276 udp_key
->udp_src
= swkey
->ipv4
.tp
.src
;
1277 udp_key
->udp_dst
= swkey
->ipv4
.tp
.dst
;
1278 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
)) {
1279 udp_key
->udp_src
= swkey
->ipv6
.tp
.src
;
1280 udp_key
->udp_dst
= swkey
->ipv6
.tp
.dst
;
1282 } else if (swkey
->eth
.type
== htons(ETH_P_IP
) &&
1283 swkey
->ip
.proto
== IPPROTO_ICMP
) {
1284 struct ovs_key_icmp
*icmp_key
;
1286 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ICMP
, sizeof(*icmp_key
));
1288 goto nla_put_failure
;
1289 icmp_key
= nla_data(nla
);
1290 icmp_key
->icmp_type
= ntohs(swkey
->ipv4
.tp
.src
);
1291 icmp_key
->icmp_code
= ntohs(swkey
->ipv4
.tp
.dst
);
1292 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
) &&
1293 swkey
->ip
.proto
== IPPROTO_ICMPV6
) {
1294 struct ovs_key_icmpv6
*icmpv6_key
;
1296 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ICMPV6
,
1297 sizeof(*icmpv6_key
));
1299 goto nla_put_failure
;
1300 icmpv6_key
= nla_data(nla
);
1301 icmpv6_key
->icmpv6_type
= ntohs(swkey
->ipv6
.tp
.src
);
1302 icmpv6_key
->icmpv6_code
= ntohs(swkey
->ipv6
.tp
.dst
);
1304 if (icmpv6_key
->icmpv6_type
== NDISC_NEIGHBOUR_SOLICITATION
||
1305 icmpv6_key
->icmpv6_type
== NDISC_NEIGHBOUR_ADVERTISEMENT
) {
1306 struct ovs_key_nd
*nd_key
;
1308 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ND
, sizeof(*nd_key
));
1310 goto nla_put_failure
;
1311 nd_key
= nla_data(nla
);
1312 memcpy(nd_key
->nd_target
, &swkey
->ipv6
.nd
.target
,
1313 sizeof(nd_key
->nd_target
));
1314 memcpy(nd_key
->nd_sll
, swkey
->ipv6
.nd
.sll
, ETH_ALEN
);
1315 memcpy(nd_key
->nd_tll
, swkey
->ipv6
.nd
.tll
, ETH_ALEN
);
1322 nla_nest_end(skb
, encap
);
1330 /* Initializes the flow module.
1331 * Returns zero if successful or a negative error code. */
1332 int ovs_flow_init(void)
1334 flow_cache
= kmem_cache_create("sw_flow", sizeof(struct sw_flow
), 0,
1336 if (flow_cache
== NULL
)
1342 /* Uninitializes the flow module. */
1343 void ovs_flow_exit(void)
1345 kmem_cache_destroy(flow_cache
);