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>
46 static struct kmem_cache
*flow_cache
;
48 static int check_header(struct sk_buff
*skb
, int len
)
50 if (unlikely(skb
->len
< len
))
52 if (unlikely(!pskb_may_pull(skb
, len
)))
57 static bool arphdr_ok(struct sk_buff
*skb
)
59 return pskb_may_pull(skb
, skb_network_offset(skb
) +
60 sizeof(struct arp_eth_header
));
63 static int check_iphdr(struct sk_buff
*skb
)
65 unsigned int nh_ofs
= skb_network_offset(skb
);
69 err
= check_header(skb
, nh_ofs
+ sizeof(struct iphdr
));
73 ip_len
= ip_hdrlen(skb
);
74 if (unlikely(ip_len
< sizeof(struct iphdr
) ||
75 skb
->len
< nh_ofs
+ ip_len
))
78 skb_set_transport_header(skb
, nh_ofs
+ ip_len
);
82 static bool tcphdr_ok(struct sk_buff
*skb
)
84 int th_ofs
= skb_transport_offset(skb
);
87 if (unlikely(!pskb_may_pull(skb
, th_ofs
+ sizeof(struct tcphdr
))))
90 tcp_len
= tcp_hdrlen(skb
);
91 if (unlikely(tcp_len
< sizeof(struct tcphdr
) ||
92 skb
->len
< th_ofs
+ tcp_len
))
98 static bool udphdr_ok(struct sk_buff
*skb
)
100 return pskb_may_pull(skb
, skb_transport_offset(skb
) +
101 sizeof(struct udphdr
));
104 static bool icmphdr_ok(struct sk_buff
*skb
)
106 return pskb_may_pull(skb
, skb_transport_offset(skb
) +
107 sizeof(struct icmphdr
));
110 u64
ovs_flow_used_time(unsigned long flow_jiffies
)
112 struct timespec cur_ts
;
115 ktime_get_ts(&cur_ts
);
116 idle_ms
= jiffies_to_msecs(jiffies
- flow_jiffies
);
117 cur_ms
= (u64
)cur_ts
.tv_sec
* MSEC_PER_SEC
+
118 cur_ts
.tv_nsec
/ NSEC_PER_MSEC
;
120 return cur_ms
- idle_ms
;
123 #define SW_FLOW_KEY_OFFSET(field) \
124 (offsetof(struct sw_flow_key, field) + \
125 FIELD_SIZEOF(struct sw_flow_key, field))
127 static int parse_ipv6hdr(struct sk_buff
*skb
, struct sw_flow_key
*key
,
130 unsigned int nh_ofs
= skb_network_offset(skb
);
138 *key_lenp
= SW_FLOW_KEY_OFFSET(ipv6
.label
);
140 err
= check_header(skb
, nh_ofs
+ sizeof(*nh
));
145 nexthdr
= nh
->nexthdr
;
146 payload_ofs
= (u8
*)(nh
+ 1) - skb
->data
;
148 key
->ip
.proto
= NEXTHDR_NONE
;
149 key
->ip
.tos
= ipv6_get_dsfield(nh
);
150 key
->ip
.ttl
= nh
->hop_limit
;
151 key
->ipv6
.label
= *(__be32
*)nh
& htonl(IPV6_FLOWINFO_FLOWLABEL
);
152 key
->ipv6
.addr
.src
= nh
->saddr
;
153 key
->ipv6
.addr
.dst
= nh
->daddr
;
155 payload_ofs
= ipv6_skip_exthdr(skb
, payload_ofs
, &nexthdr
, &frag_off
);
156 if (unlikely(payload_ofs
< 0))
160 if (frag_off
& htons(~0x7))
161 key
->ip
.frag
= OVS_FRAG_TYPE_LATER
;
163 key
->ip
.frag
= OVS_FRAG_TYPE_FIRST
;
166 nh_len
= payload_ofs
- nh_ofs
;
167 skb_set_transport_header(skb
, nh_ofs
+ nh_len
);
168 key
->ip
.proto
= nexthdr
;
172 static bool icmp6hdr_ok(struct sk_buff
*skb
)
174 return pskb_may_pull(skb
, skb_transport_offset(skb
) +
175 sizeof(struct icmp6hdr
));
178 #define TCP_FLAGS_OFFSET 13
179 #define TCP_FLAG_MASK 0x3f
181 void ovs_flow_used(struct sw_flow
*flow
, struct sk_buff
*skb
)
185 if ((flow
->key
.eth
.type
== htons(ETH_P_IP
) ||
186 flow
->key
.eth
.type
== htons(ETH_P_IPV6
)) &&
187 flow
->key
.ip
.proto
== IPPROTO_TCP
&&
188 likely(skb
->len
>= skb_transport_offset(skb
) + sizeof(struct tcphdr
))) {
189 u8
*tcp
= (u8
*)tcp_hdr(skb
);
190 tcp_flags
= *(tcp
+ TCP_FLAGS_OFFSET
) & TCP_FLAG_MASK
;
193 spin_lock(&flow
->lock
);
194 flow
->used
= jiffies
;
195 flow
->packet_count
++;
196 flow
->byte_count
+= skb
->len
;
197 flow
->tcp_flags
|= tcp_flags
;
198 spin_unlock(&flow
->lock
);
201 struct sw_flow_actions
*ovs_flow_actions_alloc(const struct nlattr
*actions
)
203 int actions_len
= nla_len(actions
);
204 struct sw_flow_actions
*sfa
;
206 if (actions_len
> MAX_ACTIONS_BUFSIZE
)
207 return ERR_PTR(-EINVAL
);
209 sfa
= kmalloc(sizeof(*sfa
) + actions_len
, GFP_KERNEL
);
211 return ERR_PTR(-ENOMEM
);
213 sfa
->actions_len
= actions_len
;
214 nla_memcpy(sfa
->actions
, actions
, actions_len
);
218 struct sw_flow
*ovs_flow_alloc(void)
220 struct sw_flow
*flow
;
222 flow
= kmem_cache_alloc(flow_cache
, GFP_KERNEL
);
224 return ERR_PTR(-ENOMEM
);
226 spin_lock_init(&flow
->lock
);
227 flow
->sf_acts
= NULL
;
232 static struct hlist_head
*find_bucket(struct flow_table
*table
, u32 hash
)
234 hash
= jhash_1word(hash
, table
->hash_seed
);
235 return flex_array_get(table
->buckets
,
236 (hash
& (table
->n_buckets
- 1)));
239 static struct flex_array
*alloc_buckets(unsigned int n_buckets
)
241 struct flex_array
*buckets
;
244 buckets
= flex_array_alloc(sizeof(struct hlist_head
*),
245 n_buckets
, GFP_KERNEL
);
249 err
= flex_array_prealloc(buckets
, 0, n_buckets
, GFP_KERNEL
);
251 flex_array_free(buckets
);
255 for (i
= 0; i
< n_buckets
; i
++)
256 INIT_HLIST_HEAD((struct hlist_head
*)
257 flex_array_get(buckets
, i
));
262 static void free_buckets(struct flex_array
*buckets
)
264 flex_array_free(buckets
);
267 struct flow_table
*ovs_flow_tbl_alloc(int new_size
)
269 struct flow_table
*table
= kmalloc(sizeof(*table
), GFP_KERNEL
);
274 table
->buckets
= alloc_buckets(new_size
);
276 if (!table
->buckets
) {
280 table
->n_buckets
= new_size
;
283 table
->keep_flows
= false;
284 get_random_bytes(&table
->hash_seed
, sizeof(u32
));
289 void ovs_flow_tbl_destroy(struct flow_table
*table
)
296 if (table
->keep_flows
)
299 for (i
= 0; i
< table
->n_buckets
; i
++) {
300 struct sw_flow
*flow
;
301 struct hlist_head
*head
= flex_array_get(table
->buckets
, i
);
302 struct hlist_node
*n
;
303 int ver
= table
->node_ver
;
305 hlist_for_each_entry_safe(flow
, n
, head
, hash_node
[ver
]) {
306 hlist_del_rcu(&flow
->hash_node
[ver
]);
312 free_buckets(table
->buckets
);
316 static void flow_tbl_destroy_rcu_cb(struct rcu_head
*rcu
)
318 struct flow_table
*table
= container_of(rcu
, struct flow_table
, rcu
);
320 ovs_flow_tbl_destroy(table
);
323 void ovs_flow_tbl_deferred_destroy(struct flow_table
*table
)
328 call_rcu(&table
->rcu
, flow_tbl_destroy_rcu_cb
);
331 struct sw_flow
*ovs_flow_tbl_next(struct flow_table
*table
, u32
*bucket
, u32
*last
)
333 struct sw_flow
*flow
;
334 struct hlist_head
*head
;
338 ver
= table
->node_ver
;
339 while (*bucket
< table
->n_buckets
) {
341 head
= flex_array_get(table
->buckets
, *bucket
);
342 hlist_for_each_entry_rcu(flow
, head
, hash_node
[ver
]) {
357 static void flow_table_copy_flows(struct flow_table
*old
, struct flow_table
*new)
362 old_ver
= old
->node_ver
;
363 new->node_ver
= !old_ver
;
365 /* Insert in new table. */
366 for (i
= 0; i
< old
->n_buckets
; i
++) {
367 struct sw_flow
*flow
;
368 struct hlist_head
*head
;
370 head
= flex_array_get(old
->buckets
, i
);
372 hlist_for_each_entry(flow
, head
, hash_node
[old_ver
])
373 ovs_flow_tbl_insert(new, flow
);
375 old
->keep_flows
= true;
378 static struct flow_table
*__flow_tbl_rehash(struct flow_table
*table
, int n_buckets
)
380 struct flow_table
*new_table
;
382 new_table
= ovs_flow_tbl_alloc(n_buckets
);
384 return ERR_PTR(-ENOMEM
);
386 flow_table_copy_flows(table
, new_table
);
391 struct flow_table
*ovs_flow_tbl_rehash(struct flow_table
*table
)
393 return __flow_tbl_rehash(table
, table
->n_buckets
);
396 struct flow_table
*ovs_flow_tbl_expand(struct flow_table
*table
)
398 return __flow_tbl_rehash(table
, table
->n_buckets
* 2);
401 void ovs_flow_free(struct sw_flow
*flow
)
406 kfree((struct sf_flow_acts __force
*)flow
->sf_acts
);
407 kmem_cache_free(flow_cache
, flow
);
410 /* RCU callback used by ovs_flow_deferred_free. */
411 static void rcu_free_flow_callback(struct rcu_head
*rcu
)
413 struct sw_flow
*flow
= container_of(rcu
, struct sw_flow
, rcu
);
418 /* Schedules 'flow' to be freed after the next RCU grace period.
419 * The caller must hold rcu_read_lock for this to be sensible. */
420 void ovs_flow_deferred_free(struct sw_flow
*flow
)
422 call_rcu(&flow
->rcu
, rcu_free_flow_callback
);
425 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
426 * The caller must hold rcu_read_lock for this to be sensible. */
427 void ovs_flow_deferred_free_acts(struct sw_flow_actions
*sf_acts
)
429 kfree_rcu(sf_acts
, rcu
);
432 static int parse_vlan(struct sk_buff
*skb
, struct sw_flow_key
*key
)
435 __be16 eth_type
; /* ETH_P_8021Q */
438 struct qtag_prefix
*qp
;
440 if (unlikely(skb
->len
< sizeof(struct qtag_prefix
) + sizeof(__be16
)))
443 if (unlikely(!pskb_may_pull(skb
, sizeof(struct qtag_prefix
) +
447 qp
= (struct qtag_prefix
*) skb
->data
;
448 key
->eth
.tci
= qp
->tci
| htons(VLAN_TAG_PRESENT
);
449 __skb_pull(skb
, sizeof(struct qtag_prefix
));
454 static __be16
parse_ethertype(struct sk_buff
*skb
)
456 struct llc_snap_hdr
{
457 u8 dsap
; /* Always 0xAA */
458 u8 ssap
; /* Always 0xAA */
463 struct llc_snap_hdr
*llc
;
466 proto
= *(__be16
*) skb
->data
;
467 __skb_pull(skb
, sizeof(__be16
));
469 if (ntohs(proto
) >= ETH_P_802_3_MIN
)
472 if (skb
->len
< sizeof(struct llc_snap_hdr
))
473 return htons(ETH_P_802_2
);
475 if (unlikely(!pskb_may_pull(skb
, sizeof(struct llc_snap_hdr
))))
478 llc
= (struct llc_snap_hdr
*) skb
->data
;
479 if (llc
->dsap
!= LLC_SAP_SNAP
||
480 llc
->ssap
!= LLC_SAP_SNAP
||
481 (llc
->oui
[0] | llc
->oui
[1] | llc
->oui
[2]) != 0)
482 return htons(ETH_P_802_2
);
484 __skb_pull(skb
, sizeof(struct llc_snap_hdr
));
486 if (ntohs(llc
->ethertype
) >= ETH_P_802_3_MIN
)
487 return llc
->ethertype
;
489 return htons(ETH_P_802_2
);
492 static int parse_icmpv6(struct sk_buff
*skb
, struct sw_flow_key
*key
,
493 int *key_lenp
, int nh_len
)
495 struct icmp6hdr
*icmp
= icmp6_hdr(skb
);
499 /* The ICMPv6 type and code fields use the 16-bit transport port
500 * fields, so we need to store them in 16-bit network byte order.
502 key
->ipv6
.tp
.src
= htons(icmp
->icmp6_type
);
503 key
->ipv6
.tp
.dst
= htons(icmp
->icmp6_code
);
504 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
506 if (icmp
->icmp6_code
== 0 &&
507 (icmp
->icmp6_type
== NDISC_NEIGHBOUR_SOLICITATION
||
508 icmp
->icmp6_type
== NDISC_NEIGHBOUR_ADVERTISEMENT
)) {
509 int icmp_len
= skb
->len
- skb_transport_offset(skb
);
513 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.nd
);
515 /* In order to process neighbor discovery options, we need the
518 if (unlikely(icmp_len
< sizeof(*nd
)))
520 if (unlikely(skb_linearize(skb
))) {
525 nd
= (struct nd_msg
*)skb_transport_header(skb
);
526 key
->ipv6
.nd
.target
= nd
->target
;
527 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.nd
);
529 icmp_len
-= sizeof(*nd
);
531 while (icmp_len
>= 8) {
532 struct nd_opt_hdr
*nd_opt
=
533 (struct nd_opt_hdr
*)(nd
->opt
+ offset
);
534 int opt_len
= nd_opt
->nd_opt_len
* 8;
536 if (unlikely(!opt_len
|| opt_len
> icmp_len
))
539 /* Store the link layer address if the appropriate
540 * option is provided. It is considered an error if
541 * the same link layer option is specified twice.
543 if (nd_opt
->nd_opt_type
== ND_OPT_SOURCE_LL_ADDR
545 if (unlikely(!is_zero_ether_addr(key
->ipv6
.nd
.sll
)))
547 memcpy(key
->ipv6
.nd
.sll
,
548 &nd
->opt
[offset
+sizeof(*nd_opt
)], ETH_ALEN
);
549 } else if (nd_opt
->nd_opt_type
== ND_OPT_TARGET_LL_ADDR
551 if (unlikely(!is_zero_ether_addr(key
->ipv6
.nd
.tll
)))
553 memcpy(key
->ipv6
.nd
.tll
,
554 &nd
->opt
[offset
+sizeof(*nd_opt
)], ETH_ALEN
);
565 memset(&key
->ipv6
.nd
.target
, 0, sizeof(key
->ipv6
.nd
.target
));
566 memset(key
->ipv6
.nd
.sll
, 0, sizeof(key
->ipv6
.nd
.sll
));
567 memset(key
->ipv6
.nd
.tll
, 0, sizeof(key
->ipv6
.nd
.tll
));
575 * ovs_flow_extract - extracts a flow key from an Ethernet frame.
576 * @skb: sk_buff that contains the frame, with skb->data pointing to the
578 * @in_port: port number on which @skb was received.
579 * @key: output flow key
580 * @key_lenp: length of output flow key
582 * The caller must ensure that skb->len >= ETH_HLEN.
584 * Returns 0 if successful, otherwise a negative errno value.
586 * Initializes @skb header pointers as follows:
588 * - skb->mac_header: the Ethernet header.
590 * - skb->network_header: just past the Ethernet header, or just past the
591 * VLAN header, to the first byte of the Ethernet payload.
593 * - skb->transport_header: If key->dl_type is ETH_P_IP or ETH_P_IPV6
594 * on output, then just past the IP header, if one is present and
595 * of a correct length, otherwise the same as skb->network_header.
596 * For other key->dl_type values it is left untouched.
598 int ovs_flow_extract(struct sk_buff
*skb
, u16 in_port
, struct sw_flow_key
*key
,
602 int key_len
= SW_FLOW_KEY_OFFSET(eth
);
605 memset(key
, 0, sizeof(*key
));
607 key
->phy
.priority
= skb
->priority
;
608 key
->phy
.in_port
= in_port
;
609 key
->phy
.skb_mark
= skb
->mark
;
611 skb_reset_mac_header(skb
);
613 /* Link layer. We are guaranteed to have at least the 14 byte Ethernet
614 * header in the linear data area.
617 memcpy(key
->eth
.src
, eth
->h_source
, ETH_ALEN
);
618 memcpy(key
->eth
.dst
, eth
->h_dest
, ETH_ALEN
);
620 __skb_pull(skb
, 2 * ETH_ALEN
);
622 if (vlan_tx_tag_present(skb
))
623 key
->eth
.tci
= htons(skb
->vlan_tci
);
624 else if (eth
->h_proto
== htons(ETH_P_8021Q
))
625 if (unlikely(parse_vlan(skb
, key
)))
628 key
->eth
.type
= parse_ethertype(skb
);
629 if (unlikely(key
->eth
.type
== htons(0)))
632 skb_reset_network_header(skb
);
633 __skb_push(skb
, skb
->data
- skb_mac_header(skb
));
636 if (key
->eth
.type
== htons(ETH_P_IP
)) {
640 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.addr
);
642 error
= check_iphdr(skb
);
643 if (unlikely(error
)) {
644 if (error
== -EINVAL
) {
645 skb
->transport_header
= skb
->network_header
;
652 key
->ipv4
.addr
.src
= nh
->saddr
;
653 key
->ipv4
.addr
.dst
= nh
->daddr
;
655 key
->ip
.proto
= nh
->protocol
;
656 key
->ip
.tos
= nh
->tos
;
657 key
->ip
.ttl
= nh
->ttl
;
659 offset
= nh
->frag_off
& htons(IP_OFFSET
);
661 key
->ip
.frag
= OVS_FRAG_TYPE_LATER
;
664 if (nh
->frag_off
& htons(IP_MF
) ||
665 skb_shinfo(skb
)->gso_type
& SKB_GSO_UDP
)
666 key
->ip
.frag
= OVS_FRAG_TYPE_FIRST
;
668 /* Transport layer. */
669 if (key
->ip
.proto
== IPPROTO_TCP
) {
670 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
671 if (tcphdr_ok(skb
)) {
672 struct tcphdr
*tcp
= tcp_hdr(skb
);
673 key
->ipv4
.tp
.src
= tcp
->source
;
674 key
->ipv4
.tp
.dst
= tcp
->dest
;
676 } else if (key
->ip
.proto
== IPPROTO_UDP
) {
677 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
678 if (udphdr_ok(skb
)) {
679 struct udphdr
*udp
= udp_hdr(skb
);
680 key
->ipv4
.tp
.src
= udp
->source
;
681 key
->ipv4
.tp
.dst
= udp
->dest
;
683 } else if (key
->ip
.proto
== IPPROTO_ICMP
) {
684 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
685 if (icmphdr_ok(skb
)) {
686 struct icmphdr
*icmp
= icmp_hdr(skb
);
687 /* The ICMP type and code fields use the 16-bit
688 * transport port fields, so we need to store
689 * them in 16-bit network byte order. */
690 key
->ipv4
.tp
.src
= htons(icmp
->type
);
691 key
->ipv4
.tp
.dst
= htons(icmp
->code
);
695 } else if ((key
->eth
.type
== htons(ETH_P_ARP
) ||
696 key
->eth
.type
== htons(ETH_P_RARP
)) && arphdr_ok(skb
)) {
697 struct arp_eth_header
*arp
;
699 arp
= (struct arp_eth_header
*)skb_network_header(skb
);
701 if (arp
->ar_hrd
== htons(ARPHRD_ETHER
)
702 && arp
->ar_pro
== htons(ETH_P_IP
)
703 && arp
->ar_hln
== ETH_ALEN
704 && arp
->ar_pln
== 4) {
706 /* We only match on the lower 8 bits of the opcode. */
707 if (ntohs(arp
->ar_op
) <= 0xff)
708 key
->ip
.proto
= ntohs(arp
->ar_op
);
709 memcpy(&key
->ipv4
.addr
.src
, arp
->ar_sip
, sizeof(key
->ipv4
.addr
.src
));
710 memcpy(&key
->ipv4
.addr
.dst
, arp
->ar_tip
, sizeof(key
->ipv4
.addr
.dst
));
711 memcpy(key
->ipv4
.arp
.sha
, arp
->ar_sha
, ETH_ALEN
);
712 memcpy(key
->ipv4
.arp
.tha
, arp
->ar_tha
, ETH_ALEN
);
713 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.arp
);
715 } else if (key
->eth
.type
== htons(ETH_P_IPV6
)) {
716 int nh_len
; /* IPv6 Header + Extensions */
718 nh_len
= parse_ipv6hdr(skb
, key
, &key_len
);
719 if (unlikely(nh_len
< 0)) {
720 if (nh_len
== -EINVAL
)
721 skb
->transport_header
= skb
->network_header
;
727 if (key
->ip
.frag
== OVS_FRAG_TYPE_LATER
)
729 if (skb_shinfo(skb
)->gso_type
& SKB_GSO_UDP
)
730 key
->ip
.frag
= OVS_FRAG_TYPE_FIRST
;
732 /* Transport layer. */
733 if (key
->ip
.proto
== NEXTHDR_TCP
) {
734 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
735 if (tcphdr_ok(skb
)) {
736 struct tcphdr
*tcp
= tcp_hdr(skb
);
737 key
->ipv6
.tp
.src
= tcp
->source
;
738 key
->ipv6
.tp
.dst
= tcp
->dest
;
740 } else if (key
->ip
.proto
== NEXTHDR_UDP
) {
741 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
742 if (udphdr_ok(skb
)) {
743 struct udphdr
*udp
= udp_hdr(skb
);
744 key
->ipv6
.tp
.src
= udp
->source
;
745 key
->ipv6
.tp
.dst
= udp
->dest
;
747 } else if (key
->ip
.proto
== NEXTHDR_ICMP
) {
748 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
749 if (icmp6hdr_ok(skb
)) {
750 error
= parse_icmpv6(skb
, key
, &key_len
, nh_len
);
762 u32
ovs_flow_hash(const struct sw_flow_key
*key
, int key_len
)
764 return jhash2((u32
*)key
, DIV_ROUND_UP(key_len
, sizeof(u32
)), 0);
767 struct sw_flow
*ovs_flow_tbl_lookup(struct flow_table
*table
,
768 struct sw_flow_key
*key
, int key_len
)
770 struct sw_flow
*flow
;
771 struct hlist_head
*head
;
774 hash
= ovs_flow_hash(key
, key_len
);
776 head
= find_bucket(table
, hash
);
777 hlist_for_each_entry_rcu(flow
, head
, hash_node
[table
->node_ver
]) {
779 if (flow
->hash
== hash
&&
780 !memcmp(&flow
->key
, key
, key_len
)) {
787 void ovs_flow_tbl_insert(struct flow_table
*table
, struct sw_flow
*flow
)
789 struct hlist_head
*head
;
791 head
= find_bucket(table
, flow
->hash
);
792 hlist_add_head_rcu(&flow
->hash_node
[table
->node_ver
], head
);
796 void ovs_flow_tbl_remove(struct flow_table
*table
, struct sw_flow
*flow
)
798 BUG_ON(table
->count
== 0);
799 hlist_del_rcu(&flow
->hash_node
[table
->node_ver
]);
803 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
804 const int ovs_key_lens
[OVS_KEY_ATTR_MAX
+ 1] = {
805 [OVS_KEY_ATTR_ENCAP
] = -1,
806 [OVS_KEY_ATTR_PRIORITY
] = sizeof(u32
),
807 [OVS_KEY_ATTR_IN_PORT
] = sizeof(u32
),
808 [OVS_KEY_ATTR_SKB_MARK
] = sizeof(u32
),
809 [OVS_KEY_ATTR_ETHERNET
] = sizeof(struct ovs_key_ethernet
),
810 [OVS_KEY_ATTR_VLAN
] = sizeof(__be16
),
811 [OVS_KEY_ATTR_ETHERTYPE
] = sizeof(__be16
),
812 [OVS_KEY_ATTR_IPV4
] = sizeof(struct ovs_key_ipv4
),
813 [OVS_KEY_ATTR_IPV6
] = sizeof(struct ovs_key_ipv6
),
814 [OVS_KEY_ATTR_TCP
] = sizeof(struct ovs_key_tcp
),
815 [OVS_KEY_ATTR_UDP
] = sizeof(struct ovs_key_udp
),
816 [OVS_KEY_ATTR_ICMP
] = sizeof(struct ovs_key_icmp
),
817 [OVS_KEY_ATTR_ICMPV6
] = sizeof(struct ovs_key_icmpv6
),
818 [OVS_KEY_ATTR_ARP
] = sizeof(struct ovs_key_arp
),
819 [OVS_KEY_ATTR_ND
] = sizeof(struct ovs_key_nd
),
822 static int ipv4_flow_from_nlattrs(struct sw_flow_key
*swkey
, int *key_len
,
823 const struct nlattr
*a
[], u32
*attrs
)
825 const struct ovs_key_icmp
*icmp_key
;
826 const struct ovs_key_tcp
*tcp_key
;
827 const struct ovs_key_udp
*udp_key
;
829 switch (swkey
->ip
.proto
) {
831 if (!(*attrs
& (1 << OVS_KEY_ATTR_TCP
)))
833 *attrs
&= ~(1 << OVS_KEY_ATTR_TCP
);
835 *key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
836 tcp_key
= nla_data(a
[OVS_KEY_ATTR_TCP
]);
837 swkey
->ipv4
.tp
.src
= tcp_key
->tcp_src
;
838 swkey
->ipv4
.tp
.dst
= tcp_key
->tcp_dst
;
842 if (!(*attrs
& (1 << OVS_KEY_ATTR_UDP
)))
844 *attrs
&= ~(1 << OVS_KEY_ATTR_UDP
);
846 *key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
847 udp_key
= nla_data(a
[OVS_KEY_ATTR_UDP
]);
848 swkey
->ipv4
.tp
.src
= udp_key
->udp_src
;
849 swkey
->ipv4
.tp
.dst
= udp_key
->udp_dst
;
853 if (!(*attrs
& (1 << OVS_KEY_ATTR_ICMP
)))
855 *attrs
&= ~(1 << OVS_KEY_ATTR_ICMP
);
857 *key_len
= SW_FLOW_KEY_OFFSET(ipv4
.tp
);
858 icmp_key
= nla_data(a
[OVS_KEY_ATTR_ICMP
]);
859 swkey
->ipv4
.tp
.src
= htons(icmp_key
->icmp_type
);
860 swkey
->ipv4
.tp
.dst
= htons(icmp_key
->icmp_code
);
867 static int ipv6_flow_from_nlattrs(struct sw_flow_key
*swkey
, int *key_len
,
868 const struct nlattr
*a
[], u32
*attrs
)
870 const struct ovs_key_icmpv6
*icmpv6_key
;
871 const struct ovs_key_tcp
*tcp_key
;
872 const struct ovs_key_udp
*udp_key
;
874 switch (swkey
->ip
.proto
) {
876 if (!(*attrs
& (1 << OVS_KEY_ATTR_TCP
)))
878 *attrs
&= ~(1 << OVS_KEY_ATTR_TCP
);
880 *key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
881 tcp_key
= nla_data(a
[OVS_KEY_ATTR_TCP
]);
882 swkey
->ipv6
.tp
.src
= tcp_key
->tcp_src
;
883 swkey
->ipv6
.tp
.dst
= tcp_key
->tcp_dst
;
887 if (!(*attrs
& (1 << OVS_KEY_ATTR_UDP
)))
889 *attrs
&= ~(1 << OVS_KEY_ATTR_UDP
);
891 *key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
892 udp_key
= nla_data(a
[OVS_KEY_ATTR_UDP
]);
893 swkey
->ipv6
.tp
.src
= udp_key
->udp_src
;
894 swkey
->ipv6
.tp
.dst
= udp_key
->udp_dst
;
898 if (!(*attrs
& (1 << OVS_KEY_ATTR_ICMPV6
)))
900 *attrs
&= ~(1 << OVS_KEY_ATTR_ICMPV6
);
902 *key_len
= SW_FLOW_KEY_OFFSET(ipv6
.tp
);
903 icmpv6_key
= nla_data(a
[OVS_KEY_ATTR_ICMPV6
]);
904 swkey
->ipv6
.tp
.src
= htons(icmpv6_key
->icmpv6_type
);
905 swkey
->ipv6
.tp
.dst
= htons(icmpv6_key
->icmpv6_code
);
907 if (swkey
->ipv6
.tp
.src
== htons(NDISC_NEIGHBOUR_SOLICITATION
) ||
908 swkey
->ipv6
.tp
.src
== htons(NDISC_NEIGHBOUR_ADVERTISEMENT
)) {
909 const struct ovs_key_nd
*nd_key
;
911 if (!(*attrs
& (1 << OVS_KEY_ATTR_ND
)))
913 *attrs
&= ~(1 << OVS_KEY_ATTR_ND
);
915 *key_len
= SW_FLOW_KEY_OFFSET(ipv6
.nd
);
916 nd_key
= nla_data(a
[OVS_KEY_ATTR_ND
]);
917 memcpy(&swkey
->ipv6
.nd
.target
, nd_key
->nd_target
,
918 sizeof(swkey
->ipv6
.nd
.target
));
919 memcpy(swkey
->ipv6
.nd
.sll
, nd_key
->nd_sll
, ETH_ALEN
);
920 memcpy(swkey
->ipv6
.nd
.tll
, nd_key
->nd_tll
, ETH_ALEN
);
928 static int parse_flow_nlattrs(const struct nlattr
*attr
,
929 const struct nlattr
*a
[], u32
*attrsp
)
931 const struct nlattr
*nla
;
936 nla_for_each_nested(nla
, attr
, rem
) {
937 u16 type
= nla_type(nla
);
940 if (type
> OVS_KEY_ATTR_MAX
|| attrs
& (1 << type
))
943 expected_len
= ovs_key_lens
[type
];
944 if (nla_len(nla
) != expected_len
&& expected_len
!= -1)
958 * ovs_flow_from_nlattrs - parses Netlink attributes into a flow key.
959 * @swkey: receives the extracted flow key.
960 * @key_lenp: number of bytes used in @swkey.
961 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
964 int ovs_flow_from_nlattrs(struct sw_flow_key
*swkey
, int *key_lenp
,
965 const struct nlattr
*attr
)
967 const struct nlattr
*a
[OVS_KEY_ATTR_MAX
+ 1];
968 const struct ovs_key_ethernet
*eth_key
;
973 memset(swkey
, 0, sizeof(struct sw_flow_key
));
974 key_len
= SW_FLOW_KEY_OFFSET(eth
);
976 err
= parse_flow_nlattrs(attr
, a
, &attrs
);
980 /* Metadata attributes. */
981 if (attrs
& (1 << OVS_KEY_ATTR_PRIORITY
)) {
982 swkey
->phy
.priority
= nla_get_u32(a
[OVS_KEY_ATTR_PRIORITY
]);
983 attrs
&= ~(1 << OVS_KEY_ATTR_PRIORITY
);
985 if (attrs
& (1 << OVS_KEY_ATTR_IN_PORT
)) {
986 u32 in_port
= nla_get_u32(a
[OVS_KEY_ATTR_IN_PORT
]);
987 if (in_port
>= DP_MAX_PORTS
)
989 swkey
->phy
.in_port
= in_port
;
990 attrs
&= ~(1 << OVS_KEY_ATTR_IN_PORT
);
992 swkey
->phy
.in_port
= DP_MAX_PORTS
;
994 if (attrs
& (1 << OVS_KEY_ATTR_SKB_MARK
)) {
995 swkey
->phy
.skb_mark
= nla_get_u32(a
[OVS_KEY_ATTR_SKB_MARK
]);
996 attrs
&= ~(1 << OVS_KEY_ATTR_SKB_MARK
);
999 /* Data attributes. */
1000 if (!(attrs
& (1 << OVS_KEY_ATTR_ETHERNET
)))
1002 attrs
&= ~(1 << OVS_KEY_ATTR_ETHERNET
);
1004 eth_key
= nla_data(a
[OVS_KEY_ATTR_ETHERNET
]);
1005 memcpy(swkey
->eth
.src
, eth_key
->eth_src
, ETH_ALEN
);
1006 memcpy(swkey
->eth
.dst
, eth_key
->eth_dst
, ETH_ALEN
);
1008 if (attrs
& (1u << OVS_KEY_ATTR_ETHERTYPE
) &&
1009 nla_get_be16(a
[OVS_KEY_ATTR_ETHERTYPE
]) == htons(ETH_P_8021Q
)) {
1010 const struct nlattr
*encap
;
1013 if (attrs
!= ((1 << OVS_KEY_ATTR_VLAN
) |
1014 (1 << OVS_KEY_ATTR_ETHERTYPE
) |
1015 (1 << OVS_KEY_ATTR_ENCAP
)))
1018 encap
= a
[OVS_KEY_ATTR_ENCAP
];
1019 tci
= nla_get_be16(a
[OVS_KEY_ATTR_VLAN
]);
1020 if (tci
& htons(VLAN_TAG_PRESENT
)) {
1021 swkey
->eth
.tci
= tci
;
1023 err
= parse_flow_nlattrs(encap
, a
, &attrs
);
1027 /* Corner case for truncated 802.1Q header. */
1031 swkey
->eth
.type
= htons(ETH_P_8021Q
);
1032 *key_lenp
= key_len
;
1039 if (attrs
& (1 << OVS_KEY_ATTR_ETHERTYPE
)) {
1040 swkey
->eth
.type
= nla_get_be16(a
[OVS_KEY_ATTR_ETHERTYPE
]);
1041 if (ntohs(swkey
->eth
.type
) < ETH_P_802_3_MIN
)
1043 attrs
&= ~(1 << OVS_KEY_ATTR_ETHERTYPE
);
1045 swkey
->eth
.type
= htons(ETH_P_802_2
);
1048 if (swkey
->eth
.type
== htons(ETH_P_IP
)) {
1049 const struct ovs_key_ipv4
*ipv4_key
;
1051 if (!(attrs
& (1 << OVS_KEY_ATTR_IPV4
)))
1053 attrs
&= ~(1 << OVS_KEY_ATTR_IPV4
);
1055 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.addr
);
1056 ipv4_key
= nla_data(a
[OVS_KEY_ATTR_IPV4
]);
1057 if (ipv4_key
->ipv4_frag
> OVS_FRAG_TYPE_MAX
)
1059 swkey
->ip
.proto
= ipv4_key
->ipv4_proto
;
1060 swkey
->ip
.tos
= ipv4_key
->ipv4_tos
;
1061 swkey
->ip
.ttl
= ipv4_key
->ipv4_ttl
;
1062 swkey
->ip
.frag
= ipv4_key
->ipv4_frag
;
1063 swkey
->ipv4
.addr
.src
= ipv4_key
->ipv4_src
;
1064 swkey
->ipv4
.addr
.dst
= ipv4_key
->ipv4_dst
;
1066 if (swkey
->ip
.frag
!= OVS_FRAG_TYPE_LATER
) {
1067 err
= ipv4_flow_from_nlattrs(swkey
, &key_len
, a
, &attrs
);
1071 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
)) {
1072 const struct ovs_key_ipv6
*ipv6_key
;
1074 if (!(attrs
& (1 << OVS_KEY_ATTR_IPV6
)))
1076 attrs
&= ~(1 << OVS_KEY_ATTR_IPV6
);
1078 key_len
= SW_FLOW_KEY_OFFSET(ipv6
.label
);
1079 ipv6_key
= nla_data(a
[OVS_KEY_ATTR_IPV6
]);
1080 if (ipv6_key
->ipv6_frag
> OVS_FRAG_TYPE_MAX
)
1082 swkey
->ipv6
.label
= ipv6_key
->ipv6_label
;
1083 swkey
->ip
.proto
= ipv6_key
->ipv6_proto
;
1084 swkey
->ip
.tos
= ipv6_key
->ipv6_tclass
;
1085 swkey
->ip
.ttl
= ipv6_key
->ipv6_hlimit
;
1086 swkey
->ip
.frag
= ipv6_key
->ipv6_frag
;
1087 memcpy(&swkey
->ipv6
.addr
.src
, ipv6_key
->ipv6_src
,
1088 sizeof(swkey
->ipv6
.addr
.src
));
1089 memcpy(&swkey
->ipv6
.addr
.dst
, ipv6_key
->ipv6_dst
,
1090 sizeof(swkey
->ipv6
.addr
.dst
));
1092 if (swkey
->ip
.frag
!= OVS_FRAG_TYPE_LATER
) {
1093 err
= ipv6_flow_from_nlattrs(swkey
, &key_len
, a
, &attrs
);
1097 } else if (swkey
->eth
.type
== htons(ETH_P_ARP
) ||
1098 swkey
->eth
.type
== htons(ETH_P_RARP
)) {
1099 const struct ovs_key_arp
*arp_key
;
1101 if (!(attrs
& (1 << OVS_KEY_ATTR_ARP
)))
1103 attrs
&= ~(1 << OVS_KEY_ATTR_ARP
);
1105 key_len
= SW_FLOW_KEY_OFFSET(ipv4
.arp
);
1106 arp_key
= nla_data(a
[OVS_KEY_ATTR_ARP
]);
1107 swkey
->ipv4
.addr
.src
= arp_key
->arp_sip
;
1108 swkey
->ipv4
.addr
.dst
= arp_key
->arp_tip
;
1109 if (arp_key
->arp_op
& htons(0xff00))
1111 swkey
->ip
.proto
= ntohs(arp_key
->arp_op
);
1112 memcpy(swkey
->ipv4
.arp
.sha
, arp_key
->arp_sha
, ETH_ALEN
);
1113 memcpy(swkey
->ipv4
.arp
.tha
, arp_key
->arp_tha
, ETH_ALEN
);
1118 *key_lenp
= key_len
;
1124 * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
1125 * @priority: receives the skb priority
1126 * @mark: receives the skb mark
1127 * @in_port: receives the extracted input port.
1128 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1131 * This parses a series of Netlink attributes that form a flow key, which must
1132 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1133 * get the metadata, that is, the parts of the flow key that cannot be
1134 * extracted from the packet itself.
1136 int ovs_flow_metadata_from_nlattrs(u32
*priority
, u32
*mark
, u16
*in_port
,
1137 const struct nlattr
*attr
)
1139 const struct nlattr
*nla
;
1142 *in_port
= DP_MAX_PORTS
;
1146 nla_for_each_nested(nla
, attr
, rem
) {
1147 int type
= nla_type(nla
);
1149 if (type
<= OVS_KEY_ATTR_MAX
&& ovs_key_lens
[type
] > 0) {
1150 if (nla_len(nla
) != ovs_key_lens
[type
])
1154 case OVS_KEY_ATTR_PRIORITY
:
1155 *priority
= nla_get_u32(nla
);
1158 case OVS_KEY_ATTR_IN_PORT
:
1159 if (nla_get_u32(nla
) >= DP_MAX_PORTS
)
1161 *in_port
= nla_get_u32(nla
);
1164 case OVS_KEY_ATTR_SKB_MARK
:
1165 *mark
= nla_get_u32(nla
);
1175 int ovs_flow_to_nlattrs(const struct sw_flow_key
*swkey
, struct sk_buff
*skb
)
1177 struct ovs_key_ethernet
*eth_key
;
1178 struct nlattr
*nla
, *encap
;
1180 if (swkey
->phy
.priority
&&
1181 nla_put_u32(skb
, OVS_KEY_ATTR_PRIORITY
, swkey
->phy
.priority
))
1182 goto nla_put_failure
;
1184 if (swkey
->phy
.in_port
!= DP_MAX_PORTS
&&
1185 nla_put_u32(skb
, OVS_KEY_ATTR_IN_PORT
, swkey
->phy
.in_port
))
1186 goto nla_put_failure
;
1188 if (swkey
->phy
.skb_mark
&&
1189 nla_put_u32(skb
, OVS_KEY_ATTR_SKB_MARK
, swkey
->phy
.skb_mark
))
1190 goto nla_put_failure
;
1192 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ETHERNET
, sizeof(*eth_key
));
1194 goto nla_put_failure
;
1195 eth_key
= nla_data(nla
);
1196 memcpy(eth_key
->eth_src
, swkey
->eth
.src
, ETH_ALEN
);
1197 memcpy(eth_key
->eth_dst
, swkey
->eth
.dst
, ETH_ALEN
);
1199 if (swkey
->eth
.tci
|| swkey
->eth
.type
== htons(ETH_P_8021Q
)) {
1200 if (nla_put_be16(skb
, OVS_KEY_ATTR_ETHERTYPE
, htons(ETH_P_8021Q
)) ||
1201 nla_put_be16(skb
, OVS_KEY_ATTR_VLAN
, swkey
->eth
.tci
))
1202 goto nla_put_failure
;
1203 encap
= nla_nest_start(skb
, OVS_KEY_ATTR_ENCAP
);
1204 if (!swkey
->eth
.tci
)
1210 if (swkey
->eth
.type
== htons(ETH_P_802_2
))
1213 if (nla_put_be16(skb
, OVS_KEY_ATTR_ETHERTYPE
, swkey
->eth
.type
))
1214 goto nla_put_failure
;
1216 if (swkey
->eth
.type
== htons(ETH_P_IP
)) {
1217 struct ovs_key_ipv4
*ipv4_key
;
1219 nla
= nla_reserve(skb
, OVS_KEY_ATTR_IPV4
, sizeof(*ipv4_key
));
1221 goto nla_put_failure
;
1222 ipv4_key
= nla_data(nla
);
1223 ipv4_key
->ipv4_src
= swkey
->ipv4
.addr
.src
;
1224 ipv4_key
->ipv4_dst
= swkey
->ipv4
.addr
.dst
;
1225 ipv4_key
->ipv4_proto
= swkey
->ip
.proto
;
1226 ipv4_key
->ipv4_tos
= swkey
->ip
.tos
;
1227 ipv4_key
->ipv4_ttl
= swkey
->ip
.ttl
;
1228 ipv4_key
->ipv4_frag
= swkey
->ip
.frag
;
1229 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
)) {
1230 struct ovs_key_ipv6
*ipv6_key
;
1232 nla
= nla_reserve(skb
, OVS_KEY_ATTR_IPV6
, sizeof(*ipv6_key
));
1234 goto nla_put_failure
;
1235 ipv6_key
= nla_data(nla
);
1236 memcpy(ipv6_key
->ipv6_src
, &swkey
->ipv6
.addr
.src
,
1237 sizeof(ipv6_key
->ipv6_src
));
1238 memcpy(ipv6_key
->ipv6_dst
, &swkey
->ipv6
.addr
.dst
,
1239 sizeof(ipv6_key
->ipv6_dst
));
1240 ipv6_key
->ipv6_label
= swkey
->ipv6
.label
;
1241 ipv6_key
->ipv6_proto
= swkey
->ip
.proto
;
1242 ipv6_key
->ipv6_tclass
= swkey
->ip
.tos
;
1243 ipv6_key
->ipv6_hlimit
= swkey
->ip
.ttl
;
1244 ipv6_key
->ipv6_frag
= swkey
->ip
.frag
;
1245 } else if (swkey
->eth
.type
== htons(ETH_P_ARP
) ||
1246 swkey
->eth
.type
== htons(ETH_P_RARP
)) {
1247 struct ovs_key_arp
*arp_key
;
1249 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ARP
, sizeof(*arp_key
));
1251 goto nla_put_failure
;
1252 arp_key
= nla_data(nla
);
1253 memset(arp_key
, 0, sizeof(struct ovs_key_arp
));
1254 arp_key
->arp_sip
= swkey
->ipv4
.addr
.src
;
1255 arp_key
->arp_tip
= swkey
->ipv4
.addr
.dst
;
1256 arp_key
->arp_op
= htons(swkey
->ip
.proto
);
1257 memcpy(arp_key
->arp_sha
, swkey
->ipv4
.arp
.sha
, ETH_ALEN
);
1258 memcpy(arp_key
->arp_tha
, swkey
->ipv4
.arp
.tha
, ETH_ALEN
);
1261 if ((swkey
->eth
.type
== htons(ETH_P_IP
) ||
1262 swkey
->eth
.type
== htons(ETH_P_IPV6
)) &&
1263 swkey
->ip
.frag
!= OVS_FRAG_TYPE_LATER
) {
1265 if (swkey
->ip
.proto
== IPPROTO_TCP
) {
1266 struct ovs_key_tcp
*tcp_key
;
1268 nla
= nla_reserve(skb
, OVS_KEY_ATTR_TCP
, sizeof(*tcp_key
));
1270 goto nla_put_failure
;
1271 tcp_key
= nla_data(nla
);
1272 if (swkey
->eth
.type
== htons(ETH_P_IP
)) {
1273 tcp_key
->tcp_src
= swkey
->ipv4
.tp
.src
;
1274 tcp_key
->tcp_dst
= swkey
->ipv4
.tp
.dst
;
1275 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
)) {
1276 tcp_key
->tcp_src
= swkey
->ipv6
.tp
.src
;
1277 tcp_key
->tcp_dst
= swkey
->ipv6
.tp
.dst
;
1279 } else if (swkey
->ip
.proto
== IPPROTO_UDP
) {
1280 struct ovs_key_udp
*udp_key
;
1282 nla
= nla_reserve(skb
, OVS_KEY_ATTR_UDP
, sizeof(*udp_key
));
1284 goto nla_put_failure
;
1285 udp_key
= nla_data(nla
);
1286 if (swkey
->eth
.type
== htons(ETH_P_IP
)) {
1287 udp_key
->udp_src
= swkey
->ipv4
.tp
.src
;
1288 udp_key
->udp_dst
= swkey
->ipv4
.tp
.dst
;
1289 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
)) {
1290 udp_key
->udp_src
= swkey
->ipv6
.tp
.src
;
1291 udp_key
->udp_dst
= swkey
->ipv6
.tp
.dst
;
1293 } else if (swkey
->eth
.type
== htons(ETH_P_IP
) &&
1294 swkey
->ip
.proto
== IPPROTO_ICMP
) {
1295 struct ovs_key_icmp
*icmp_key
;
1297 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ICMP
, sizeof(*icmp_key
));
1299 goto nla_put_failure
;
1300 icmp_key
= nla_data(nla
);
1301 icmp_key
->icmp_type
= ntohs(swkey
->ipv4
.tp
.src
);
1302 icmp_key
->icmp_code
= ntohs(swkey
->ipv4
.tp
.dst
);
1303 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
) &&
1304 swkey
->ip
.proto
== IPPROTO_ICMPV6
) {
1305 struct ovs_key_icmpv6
*icmpv6_key
;
1307 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ICMPV6
,
1308 sizeof(*icmpv6_key
));
1310 goto nla_put_failure
;
1311 icmpv6_key
= nla_data(nla
);
1312 icmpv6_key
->icmpv6_type
= ntohs(swkey
->ipv6
.tp
.src
);
1313 icmpv6_key
->icmpv6_code
= ntohs(swkey
->ipv6
.tp
.dst
);
1315 if (icmpv6_key
->icmpv6_type
== NDISC_NEIGHBOUR_SOLICITATION
||
1316 icmpv6_key
->icmpv6_type
== NDISC_NEIGHBOUR_ADVERTISEMENT
) {
1317 struct ovs_key_nd
*nd_key
;
1319 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ND
, sizeof(*nd_key
));
1321 goto nla_put_failure
;
1322 nd_key
= nla_data(nla
);
1323 memcpy(nd_key
->nd_target
, &swkey
->ipv6
.nd
.target
,
1324 sizeof(nd_key
->nd_target
));
1325 memcpy(nd_key
->nd_sll
, swkey
->ipv6
.nd
.sll
, ETH_ALEN
);
1326 memcpy(nd_key
->nd_tll
, swkey
->ipv6
.nd
.tll
, ETH_ALEN
);
1333 nla_nest_end(skb
, encap
);
1341 /* Initializes the flow module.
1342 * Returns zero if successful or a negative error code. */
1343 int ovs_flow_init(void)
1345 flow_cache
= kmem_cache_create("sw_flow", sizeof(struct sw_flow
), 0,
1347 if (flow_cache
== NULL
)
1353 /* Uninitializes the flow module. */
1354 void ovs_flow_exit(void)
1356 kmem_cache_destroy(flow_cache
);