2 * Copyright (c) 2007-2012 Nicira, Inc.
3 * Distributed under the terms of the GNU GPL version 2.
5 * Significant portions of this file may be copied from parts of the Linux
6 * kernel, by Linus Torvalds and others.
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11 #include <linux/version.h>
12 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
17 #include <linux/list.h>
18 #include <linux/net.h>
19 #include <net/net_namespace.h>
22 #include <net/inet_frag.h>
24 #include <net/protocol.h>
30 #include "vport-generic.h"
32 #define CAPWAP_SRC_PORT 58881
33 #define CAPWAP_DST_PORT 58882
35 #define CAPWAP_FRAG_TIMEOUT (30 * HZ)
36 #define CAPWAP_FRAG_MAX_MEM (256 * 1024)
37 #define CAPWAP_FRAG_PRUNE_MEM (192 * 1024)
38 #define CAPWAP_FRAG_SECRET_INTERVAL (10 * 60 * HZ)
41 * The CAPWAP header is a mess, with all kinds of odd size bit fields that
42 * cross byte boundaries, which are difficult to represent correctly in
43 * various byte orderings. Luckily we only care about a few permutations, so
44 * statically create them and we can do very fast parsing by checking all 12
47 #define CAPWAP_PREAMBLE_MASK __cpu_to_be32(0xFF000000)
48 #define CAPWAP_HLEN_SHIFT 17
49 #define CAPWAP_HLEN_MASK __cpu_to_be32(0x00F80000)
50 #define CAPWAP_RID_MASK __cpu_to_be32(0x0007C000)
51 #define CAPWAP_WBID_MASK __cpu_to_be32(0x00003E00)
52 #define CAPWAP_F_MASK __cpu_to_be32(0x000001FF)
54 #define CAPWAP_F_FRAG __cpu_to_be32(0x00000080)
55 #define CAPWAP_F_LASTFRAG __cpu_to_be32(0x00000040)
56 #define CAPWAP_F_WSI __cpu_to_be32(0x00000020)
57 #define CAPWAP_F_RMAC __cpu_to_be32(0x00000010)
59 #define CAPWAP_RMAC_LEN 4
61 /* Standard CAPWAP looks for a WBID value of 2.
62 * When we insert WSI field, use WBID value of 30, which has been
63 * proposed for all "experimental" usage - users with no reserved WBID value
66 #define CAPWAP_WBID_30 __cpu_to_be32(0x00003C00)
67 #define CAPWAP_WBID_2 __cpu_to_be32(0x00000200)
69 #define FRAG_HDR (CAPWAP_F_FRAG)
70 #define FRAG_LAST_HDR (FRAG_HDR | CAPWAP_F_LASTFRAG)
72 /* Keyed packet, WBID 30, and length long enough to include WSI key */
73 #define CAPWAP_KEYED (CAPWAP_WBID_30 | CAPWAP_F_WSI | htonl(20 << CAPWAP_HLEN_SHIFT))
74 /* A backward-compatible packet, WBID 2 and length of 2 words (no WSI fields) */
75 #define CAPWAP_NO_WSI (CAPWAP_WBID_2 | htonl(8 << CAPWAP_HLEN_SHIFT))
77 /* Mask for all parts of header that must be 0. */
78 #define CAPWAP_ZERO_MASK (CAPWAP_PREAMBLE_MASK | \
79 (CAPWAP_F_MASK ^ (CAPWAP_F_WSI | CAPWAP_F_FRAG | CAPWAP_F_LASTFRAG | CAPWAP_F_RMAC)))
84 /* low 3 bits of frag_off are reserved */
89 * We use the WSI field to hold additional tunnel data.
90 * The first eight bits store the size of the wsi data in bytes.
92 struct capwaphdr_wsi {
95 __be16 reserved_padding;
98 struct capwaphdr_wsi_key {
102 /* Flag indicating a 64bit key is stored in WSI data field */
103 #define CAPWAP_WSI_F_KEY64 0x80
105 static struct capwaphdr *capwap_hdr(const struct sk_buff *skb)
107 return (struct capwaphdr *)(udp_hdr(skb) + 1);
111 * The fragment offset is actually the high 13 bits of the last 16 bit field,
112 * so we would normally need to right shift 3 places. However, it stores the
113 * offset in 8 byte chunks, which would involve a 3 place left shift. So we
114 * just mask off the last 3 bits and be done with it.
116 #define FRAG_OFF_MASK (~0x7U)
119 * The minimum header length. The header may be longer if the optional
122 #define CAPWAP_MIN_HLEN (sizeof(struct udphdr) + sizeof(struct capwaphdr))
131 struct inet_frag_queue ifq;
132 struct frag_match match;
138 #define FRAG_CB(skb) ((struct frag_skb_cb *)(skb)->cb)
140 static struct sk_buff *fragment(struct sk_buff *, const struct vport *,
141 struct dst_entry *dst, unsigned int hlen);
142 static struct sk_buff *defrag(struct sk_buff *, bool frag_last);
144 static void capwap_frag_init(struct inet_frag_queue *, void *match);
145 static unsigned int capwap_frag_hash(struct inet_frag_queue *);
146 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
147 static int capwap_frag_match(struct inet_frag_queue *, void *match);
149 static bool capwap_frag_match(struct inet_frag_queue *, void *match);
151 static void capwap_frag_expire(unsigned long ifq);
153 static struct inet_frags frag_state = {
154 .constructor = capwap_frag_init,
155 .qsize = sizeof(struct frag_queue),
156 .hashfn = capwap_frag_hash,
157 .match = capwap_frag_match,
158 .frag_expire = capwap_frag_expire,
159 .secret_interval = CAPWAP_FRAG_SECRET_INTERVAL,
162 static int capwap_hdr_len(const struct tnl_mutable_config *mutable,
163 const struct ovs_key_ipv4_tunnel *tun_key)
165 int size = CAPWAP_MIN_HLEN;
169 tnl_get_param(mutable, tun_key, &flags, &out_key);
171 /* CAPWAP has no checksums. */
172 if (flags & TNL_F_CSUM)
175 /* if keys are specified, then add WSI field */
176 if (out_key || (flags & TNL_F_OUT_KEY_ACTION)) {
177 size += sizeof(struct capwaphdr_wsi) +
178 sizeof(struct capwaphdr_wsi_key);
184 static struct sk_buff *capwap_build_header(const struct vport *vport,
185 const struct tnl_mutable_config *mutable,
186 struct dst_entry *dst,
190 struct ovs_key_ipv4_tunnel *tun_key = OVS_CB(skb)->tun_key;
191 struct udphdr *udph = udp_hdr(skb);
192 struct capwaphdr *cwh = (struct capwaphdr *)(udph + 1);
196 tnl_get_param(mutable, tun_key, &flags, &out_key);
198 udph->source = htons(CAPWAP_SRC_PORT);
199 udph->dest = htons(CAPWAP_DST_PORT);
205 if (out_key || flags & TNL_F_OUT_KEY_ACTION) {
206 /* first field in WSI is key */
207 struct capwaphdr_wsi *wsi = (struct capwaphdr_wsi *)(cwh + 1);
209 cwh->begin = CAPWAP_KEYED;
211 /* -1 for wsi_len byte, not included in length as per spec */
212 wsi->wsi_len = sizeof(struct capwaphdr_wsi) - 1
213 + sizeof(struct capwaphdr_wsi_key);
214 wsi->flags = CAPWAP_WSI_F_KEY64;
215 wsi->reserved_padding = 0;
218 struct capwaphdr_wsi_key *opt = (struct capwaphdr_wsi_key *)(wsi + 1);
222 /* make packet readable by old capwap code */
223 cwh->begin = CAPWAP_NO_WSI;
225 udph->len = htons(skb->len - skb_transport_offset(skb));
227 if (unlikely(skb->len - skb_network_offset(skb) > dst_mtu(dst))) {
228 unsigned int hlen = skb_transport_offset(skb) + capwap_hdr_len(mutable, tun_key);
229 skb = fragment(skb, vport, dst, hlen);
235 static int process_capwap_wsi(struct sk_buff *skb, __be64 *key, bool *key_present)
237 struct capwaphdr *cwh = capwap_hdr(skb);
238 struct capwaphdr_wsi *wsi;
243 if (((cwh->begin & CAPWAP_WBID_MASK) != CAPWAP_WBID_30))
246 if (cwh->begin & CAPWAP_F_RMAC)
247 rmac_len = CAPWAP_RMAC_LEN;
249 hdr_len = ntohl(cwh->begin & CAPWAP_HLEN_MASK) >> CAPWAP_HLEN_SHIFT;
251 if (unlikely(sizeof(struct capwaphdr) + rmac_len + sizeof(struct capwaphdr_wsi) > hdr_len))
254 /* read wsi header to find out how big it really is */
255 wsi = (struct capwaphdr_wsi *)((u8 *)(cwh + 1) + rmac_len);
256 /* +1 for length byte not included in wsi_len */
257 wsi_len = 1 + wsi->wsi_len;
259 if (unlikely(sizeof(struct capwaphdr) + rmac_len + wsi_len != hdr_len))
262 wsi_len -= sizeof(struct capwaphdr_wsi);
264 if (wsi->flags & CAPWAP_WSI_F_KEY64) {
265 struct capwaphdr_wsi_key *opt;
267 if (unlikely(wsi_len < sizeof(struct capwaphdr_wsi_key)))
270 opt = (struct capwaphdr_wsi_key *)(wsi + 1);
274 *key_present = false;
280 static struct sk_buff *process_capwap_proto(struct sk_buff *skb, __be64 *key, bool *key_present)
282 struct capwaphdr *cwh = capwap_hdr(skb);
283 int hdr_len = sizeof(struct udphdr);
285 if (unlikely((cwh->begin & CAPWAP_ZERO_MASK) != 0))
288 hdr_len += ntohl(cwh->begin & CAPWAP_HLEN_MASK) >> CAPWAP_HLEN_SHIFT;
289 if (unlikely(hdr_len < CAPWAP_MIN_HLEN))
292 if (unlikely(!pskb_may_pull(skb, hdr_len + ETH_HLEN)))
295 cwh = capwap_hdr(skb);
296 __skb_pull(skb, hdr_len);
297 skb_postpull_rcsum(skb, skb_transport_header(skb), hdr_len + ETH_HLEN);
299 if (cwh->begin & CAPWAP_F_FRAG) {
300 skb = defrag(skb, (__force bool)(cwh->begin & CAPWAP_F_LASTFRAG));
303 cwh = capwap_hdr(skb);
306 if ((cwh->begin & CAPWAP_F_WSI) && process_capwap_wsi(skb, key, key_present))
315 /* Called with rcu_read_lock and BH disabled. */
316 static int capwap_rcv(struct sock *sk, struct sk_buff *skb)
319 const struct tnl_mutable_config *mutable;
321 struct ovs_key_ipv4_tunnel tun_key;
323 bool key_present = false;
325 if (unlikely(!pskb_may_pull(skb, CAPWAP_MIN_HLEN + ETH_HLEN)))
328 skb = process_capwap_proto(skb, &key, &key_present);
333 vport = ovs_tnl_find_port(sock_net(sk), iph->daddr, iph->saddr, key,
334 TNL_T_PROTO_CAPWAP, &mutable);
335 if (unlikely(!vport))
338 if (key_present && mutable->key.daddr &&
339 !(mutable->flags & TNL_F_IN_KEY_MATCH)) {
344 tnl_tun_key_init(&tun_key, iph, key, key_present ? OVS_TNL_F_KEY : 0);
345 OVS_CB(skb)->tun_key = &tun_key;
347 ovs_tnl_rcv(vport, skb);
356 static const struct tnl_ops capwap_tnl_ops = {
357 .tunnel_type = TNL_T_PROTO_CAPWAP,
358 .ipproto = IPPROTO_UDP,
359 .hdr_len = capwap_hdr_len,
360 .build_header = capwap_build_header,
363 static inline struct capwap_net *ovs_get_capwap_net(struct net *net)
365 struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
366 return &ovs_net->vport_net.capwap;
369 /* Arbitrary value. Irrelevant as long as it's not 0 since we set the handler. */
370 #define UDP_ENCAP_CAPWAP 10
371 static int init_socket(struct net *net)
374 struct capwap_net *capwap_net = ovs_get_capwap_net(net);
375 struct sockaddr_in sin;
377 if (capwap_net->n_tunnels) {
378 capwap_net->n_tunnels++;
382 err = sock_create_kern(AF_INET, SOCK_DGRAM, 0,
383 &capwap_net->capwap_rcv_socket);
387 /* release net ref. */
388 sk_change_net(capwap_net->capwap_rcv_socket->sk, net);
390 sin.sin_family = AF_INET;
391 sin.sin_addr.s_addr = htonl(INADDR_ANY);
392 sin.sin_port = htons(CAPWAP_DST_PORT);
394 err = kernel_bind(capwap_net->capwap_rcv_socket,
395 (struct sockaddr *)&sin,
396 sizeof(struct sockaddr_in));
400 udp_sk(capwap_net->capwap_rcv_socket->sk)->encap_type = UDP_ENCAP_CAPWAP;
401 udp_sk(capwap_net->capwap_rcv_socket->sk)->encap_rcv = capwap_rcv;
403 capwap_net->frag_state.timeout = CAPWAP_FRAG_TIMEOUT;
404 capwap_net->frag_state.high_thresh = CAPWAP_FRAG_MAX_MEM;
405 capwap_net->frag_state.low_thresh = CAPWAP_FRAG_PRUNE_MEM;
407 inet_frags_init_net(&capwap_net->frag_state);
409 capwap_net->n_tunnels++;
413 sk_release_kernel(capwap_net->capwap_rcv_socket->sk);
415 pr_warn("cannot register capwap protocol handler : %d\n", err);
419 static void release_socket(struct net *net)
421 struct capwap_net *capwap_net = ovs_get_capwap_net(net);
423 capwap_net->n_tunnels--;
424 if (capwap_net->n_tunnels)
427 inet_frags_exit_net(&capwap_net->frag_state, &frag_state);
428 sk_release_kernel(capwap_net->capwap_rcv_socket->sk);
431 static struct vport *capwap_create(const struct vport_parms *parms)
436 err = init_socket(ovs_dp_get_net(parms->dp));
440 vport = ovs_tnl_create(parms, &ovs_capwap_vport_ops, &capwap_tnl_ops);
442 release_socket(ovs_dp_get_net(parms->dp));
447 static void capwap_destroy(struct vport *vport)
449 ovs_tnl_destroy(vport);
450 release_socket(ovs_dp_get_net(vport->dp));
453 static int capwap_init(void)
455 inet_frags_init(&frag_state);
459 static void capwap_exit(void)
461 inet_frags_fini(&frag_state);
464 static void copy_skb_metadata(struct sk_buff *from, struct sk_buff *to)
466 to->pkt_type = from->pkt_type;
467 to->priority = from->priority;
468 to->protocol = from->protocol;
469 skb_dst_set(to, dst_clone(skb_dst(from)));
471 to->mark = from->mark;
474 skb_set_owner_w(to, from->sk);
476 #ifdef CONFIG_NET_SCHED
477 to->tc_index = from->tc_index;
479 #if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
480 to->ipvs_property = from->ipvs_property;
482 skb_copy_secmark(to, from);
485 static struct sk_buff *fragment(struct sk_buff *skb, const struct vport *vport,
486 struct dst_entry *dst, unsigned int hlen)
488 struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
489 unsigned int headroom;
490 unsigned int max_frame_len = dst_mtu(dst) + skb_network_offset(skb);
491 struct sk_buff *result = NULL, *list_cur = NULL;
492 unsigned int remaining;
496 if (hlen + ~FRAG_OFF_MASK + 1 > max_frame_len) {
498 pr_warn("capwap link mtu (%d) is less than minimum packet (%d)\n",
500 hlen - skb_network_offset(skb) + ~FRAG_OFF_MASK + 1);
504 remaining = skb->len - hlen;
506 frag_id = htons(atomic_inc_return(&tnl_vport->frag_id));
508 headroom = dst->header_len + 16;
509 if (!skb_network_offset(skb))
510 headroom += LL_RESERVED_SPACE(dst->dev);
513 struct sk_buff *skb2;
516 struct capwaphdr *cwh;
518 frag_size = min(remaining, max_frame_len - hlen);
519 if (remaining > frag_size)
520 frag_size &= FRAG_OFF_MASK;
522 skb2 = alloc_skb(headroom + hlen + frag_size, GFP_ATOMIC);
526 skb_reserve(skb2, headroom);
527 __skb_put(skb2, hlen + frag_size);
529 if (skb_network_offset(skb))
530 skb_reset_mac_header(skb2);
531 skb_set_network_header(skb2, skb_network_offset(skb));
532 skb_set_transport_header(skb2, skb_transport_offset(skb));
534 /* Copy (Ethernet)/IP/UDP/CAPWAP header. */
535 copy_skb_metadata(skb, skb2);
536 skb_copy_from_linear_data(skb, skb2->data, hlen);
538 /* Copy this data chunk. */
539 if (skb_copy_bits(skb, hlen + offset, skb2->data + hlen, frag_size))
542 udph = udp_hdr(skb2);
543 udph->len = htons(skb2->len - skb_transport_offset(skb2));
545 cwh = capwap_hdr(skb2);
546 if (remaining > frag_size)
547 cwh->begin |= FRAG_HDR;
549 cwh->begin |= FRAG_LAST_HDR;
550 cwh->frag_id = frag_id;
551 cwh->frag_off = htons(offset);
554 list_cur->next = skb2;
557 result = list_cur = skb2;
560 remaining -= frag_size;
567 ovs_tnl_free_linked_skbs(result);
572 /* All of the following functions relate to fragmentation reassembly. */
574 static struct frag_queue *ifq_cast(struct inet_frag_queue *ifq)
576 return container_of(ifq, struct frag_queue, ifq);
579 static u32 frag_hash(struct frag_match *match)
581 return jhash_3words((__force u16)match->id, (__force u32)match->saddr,
582 (__force u32)match->daddr,
583 frag_state.rnd) & (INETFRAGS_HASHSZ - 1);
586 static struct frag_queue *queue_find(struct netns_frags *ns_frag_state,
587 struct frag_match *match)
589 struct inet_frag_queue *ifq;
591 read_lock(&frag_state.lock);
593 ifq = inet_frag_find(ns_frag_state, &frag_state, match, frag_hash(match));
597 /* Unlock happens inside inet_frag_find(). */
599 return ifq_cast(ifq);
602 static struct sk_buff *frag_reasm(struct frag_queue *fq, struct net_device *dev)
604 struct sk_buff *head = fq->ifq.fragments;
605 struct sk_buff *frag;
607 /* Succeed or fail, we're done with this queue. */
608 inet_frag_kill(&fq->ifq, &frag_state);
610 if (fq->ifq.len > 65535)
613 /* Can't have the head be a clone. */
614 if (skb_cloned(head) && pskb_expand_head(head, 0, 0, GFP_ATOMIC))
618 * We're about to build frag list for this SKB. If it already has a
619 * frag list, alloc a new SKB and put the existing frag list there.
621 if (skb_shinfo(head)->frag_list) {
625 frag = alloc_skb(0, GFP_ATOMIC);
629 frag->next = head->next;
631 skb_shinfo(frag)->frag_list = skb_shinfo(head)->frag_list;
632 skb_shinfo(head)->frag_list = NULL;
634 for (i = 0; i < skb_shinfo(head)->nr_frags; i++)
635 paged_len += skb_shinfo(head)->frags[i].size;
636 frag->len = frag->data_len = head->data_len - paged_len;
637 head->data_len -= frag->len;
638 head->len -= frag->len;
640 frag->ip_summed = head->ip_summed;
641 atomic_add(frag->truesize, &fq->ifq.net->mem);
644 skb_shinfo(head)->frag_list = head->next;
645 atomic_sub(head->truesize, &fq->ifq.net->mem);
647 /* Properly account for data in various packets. */
648 for (frag = head->next; frag; frag = frag->next) {
649 head->data_len += frag->len;
650 head->len += frag->len;
652 if (head->ip_summed != frag->ip_summed)
653 head->ip_summed = CHECKSUM_NONE;
654 else if (head->ip_summed == CHECKSUM_COMPLETE)
655 head->csum = csum_add(head->csum, frag->csum);
657 head->truesize += frag->truesize;
658 atomic_sub(frag->truesize, &fq->ifq.net->mem);
663 head->tstamp = fq->ifq.stamp;
664 fq->ifq.fragments = NULL;
669 static struct sk_buff *frag_queue(struct frag_queue *fq, struct sk_buff *skb,
670 u16 offset, bool frag_last)
672 struct sk_buff *prev, *next;
673 struct net_device *dev;
676 if (fq->ifq.last_in & INET_FRAG_COMPLETE)
682 end = offset + skb->len;
686 * Last fragment, shouldn't already have data past our end or
687 * have another last fragment.
689 if (end < fq->ifq.len || fq->ifq.last_in & INET_FRAG_LAST_IN)
692 fq->ifq.last_in |= INET_FRAG_LAST_IN;
695 /* Fragments should align to 8 byte chunks. */
696 if (end & ~FRAG_OFF_MASK)
699 if (end > fq->ifq.len) {
701 * Shouldn't have data past the end, if we already
704 if (fq->ifq.last_in & INET_FRAG_LAST_IN)
711 /* Find where we fit in. */
713 for (next = fq->ifq.fragments; next != NULL; next = next->next) {
714 if (FRAG_CB(next)->offset >= offset)
720 * Overlapping fragments aren't allowed. We shouldn't start before
721 * the end of the previous fragment.
723 if (prev && FRAG_CB(prev)->offset + prev->len > offset)
726 /* We also shouldn't end after the beginning of the next fragment. */
727 if (next && end > FRAG_CB(next)->offset)
730 FRAG_CB(skb)->offset = offset;
732 /* Link into list. */
737 fq->ifq.fragments = skb;
742 fq->ifq.stamp = skb->tstamp;
743 fq->ifq.meat += skb->len;
744 atomic_add(skb->truesize, &fq->ifq.net->mem);
746 fq->ifq.last_in |= INET_FRAG_FIRST_IN;
748 /* If we have all fragments do reassembly. */
749 if (fq->ifq.last_in == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
750 fq->ifq.meat == fq->ifq.len)
751 return frag_reasm(fq, dev);
753 write_lock(&frag_state.lock);
754 list_move_tail(&fq->ifq.lru_list, &fq->ifq.net->lru_list);
755 write_unlock(&frag_state.lock);
764 static struct sk_buff *defrag(struct sk_buff *skb, bool frag_last)
766 struct iphdr *iph = ip_hdr(skb);
767 struct capwaphdr *cwh = capwap_hdr(skb);
768 struct capwap_net *capwap_net = ovs_get_capwap_net(dev_net(skb->dev));
769 struct netns_frags *ns_frag_state = &capwap_net->frag_state;
770 struct frag_match match;
772 struct frag_queue *fq;
774 inet_frag_evictor(ns_frag_state, &frag_state, false);
776 match.daddr = iph->daddr;
777 match.saddr = iph->saddr;
778 match.id = cwh->frag_id;
779 frag_off = ntohs(cwh->frag_off) & FRAG_OFF_MASK;
781 fq = queue_find(ns_frag_state, &match);
783 spin_lock(&fq->ifq.lock);
784 skb = frag_queue(fq, skb, frag_off, frag_last);
785 spin_unlock(&fq->ifq.lock);
787 inet_frag_put(&fq->ifq, &frag_state);
796 static void capwap_frag_init(struct inet_frag_queue *ifq, void *match_)
798 struct frag_match *match = match_;
800 ifq_cast(ifq)->match = *match;
803 static unsigned int capwap_frag_hash(struct inet_frag_queue *ifq)
805 return frag_hash(&ifq_cast(ifq)->match);
808 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
809 static int capwap_frag_match(struct inet_frag_queue *ifq, void *a_)
811 static bool capwap_frag_match(struct inet_frag_queue *ifq, void *a_)
814 struct frag_match *a = a_;
815 struct frag_match *b = &ifq_cast(ifq)->match;
817 return a->id == b->id && a->saddr == b->saddr && a->daddr == b->daddr;
820 /* Run when the timeout for a given queue expires. */
821 static void capwap_frag_expire(unsigned long ifq)
823 struct frag_queue *fq;
825 fq = ifq_cast((struct inet_frag_queue *)ifq);
827 spin_lock(&fq->ifq.lock);
829 if (!(fq->ifq.last_in & INET_FRAG_COMPLETE))
830 inet_frag_kill(&fq->ifq, &frag_state);
832 spin_unlock(&fq->ifq.lock);
833 inet_frag_put(&fq->ifq, &frag_state);
836 const struct vport_ops ovs_capwap_vport_ops = {
837 .type = OVS_VPORT_TYPE_CAPWAP,
838 .flags = VPORT_F_TUN_ID,
841 .create = capwap_create,
842 .destroy = capwap_destroy,
843 .set_addr = ovs_tnl_set_addr,
844 .get_name = ovs_tnl_get_name,
845 .get_addr = ovs_tnl_get_addr,
846 .get_options = ovs_tnl_get_options,
847 .set_options = ovs_tnl_set_options,
848 .get_dev_flags = ovs_vport_gen_get_dev_flags,
849 .is_running = ovs_vport_gen_is_running,
850 .get_operstate = ovs_vport_gen_get_operstate,
851 .send = ovs_tnl_send,
854 #warning CAPWAP tunneling will not be available on kernels before 2.6.26
855 #endif /* Linux kernel < 2.6.26 */