2 * Copyright (c) 2007-2012 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
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 #include <linux/if_arp.h>
22 #include <linux/if_ether.h>
24 #include <linux/if_vlan.h>
25 #include <linux/igmp.h>
27 #include <linux/in_route.h>
28 #include <linux/inetdevice.h>
29 #include <linux/jhash.h>
30 #include <linux/list.h>
31 #include <linux/kernel.h>
32 #include <linux/version.h>
33 #include <linux/workqueue.h>
34 #include <linux/rculist.h>
36 #include <net/dsfield.h>
39 #include <net/inet_ecn.h>
41 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
44 #include <net/route.h>
53 #include "vport-internal_dev.h"
55 #define PORT_TABLE_SIZE 1024
57 static struct hlist_head *port_table __read_mostly;
60 * These are just used as an optimization: they don't require any kind of
61 * synchronization because we could have just as easily read the value before
62 * the port change happened.
64 static unsigned int key_local_remote_ports __read_mostly;
65 static unsigned int key_remote_ports __read_mostly;
66 static unsigned int key_multicast_ports __read_mostly;
67 static unsigned int local_remote_ports __read_mostly;
68 static unsigned int remote_ports __read_mostly;
69 static unsigned int null_ports __read_mostly;
70 static unsigned int multicast_ports __read_mostly;
72 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
73 #define rt_dst(rt) (rt->dst)
75 #define rt_dst(rt) (rt->u.dst)
78 static struct vport *tnl_vport_to_vport(const struct tnl_vport *tnl_vport)
80 return vport_from_priv(tnl_vport);
83 static void free_config_rcu(struct rcu_head *rcu)
85 struct tnl_mutable_config *c = container_of(rcu, struct tnl_mutable_config, rcu);
89 /* Frees the portion of 'mutable' that requires RTNL and thus can't happen
90 * within an RCU callback. Fortunately this part doesn't require waiting for
91 * an RCU grace period.
93 static void free_mutable_rtnl(struct tnl_mutable_config *mutable)
96 if (ipv4_is_multicast(mutable->key.daddr) && mutable->mlink) {
97 struct in_device *in_dev;
98 in_dev = inetdev_by_index(port_key_get_net(&mutable->key), mutable->mlink);
100 ip_mc_dec_group(in_dev, mutable->key.daddr);
104 static void assign_config_rcu(struct vport *vport,
105 struct tnl_mutable_config *new_config)
107 struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
108 struct tnl_mutable_config *old_config;
110 old_config = rtnl_dereference(tnl_vport->mutable);
111 rcu_assign_pointer(tnl_vport->mutable, new_config);
113 free_mutable_rtnl(old_config);
114 call_rcu(&old_config->rcu, free_config_rcu);
117 static unsigned int *find_port_pool(const struct tnl_mutable_config *mutable)
119 bool is_multicast = ipv4_is_multicast(mutable->key.daddr);
121 if (mutable->flags & TNL_F_IN_KEY_MATCH) {
122 if (mutable->key.saddr)
123 return &local_remote_ports;
124 else if (is_multicast)
125 return &multicast_ports;
127 return &remote_ports;
129 if (mutable->key.saddr)
130 return &key_local_remote_ports;
131 else if (is_multicast)
132 return &key_multicast_ports;
133 else if (mutable->key.daddr)
134 return &key_remote_ports;
140 static u32 port_hash(const struct port_lookup_key *key)
142 return jhash2((u32 *)key, (PORT_KEY_LEN / sizeof(u32)), 0);
145 static struct hlist_head *find_bucket(u32 hash)
147 return &port_table[(hash & (PORT_TABLE_SIZE - 1))];
150 static void port_table_add_port(struct vport *vport)
152 struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
153 const struct tnl_mutable_config *mutable;
156 mutable = rtnl_dereference(tnl_vport->mutable);
157 hash = port_hash(&mutable->key);
158 hlist_add_head_rcu(&tnl_vport->hash_node, find_bucket(hash));
160 (*find_port_pool(rtnl_dereference(tnl_vport->mutable)))++;
163 static void port_table_move_port(struct vport *vport,
164 struct tnl_mutable_config *new_mutable)
166 struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
169 hash = port_hash(&new_mutable->key);
170 hlist_del_init_rcu(&tnl_vport->hash_node);
171 hlist_add_head_rcu(&tnl_vport->hash_node, find_bucket(hash));
173 (*find_port_pool(rtnl_dereference(tnl_vport->mutable)))--;
174 assign_config_rcu(vport, new_mutable);
175 (*find_port_pool(rtnl_dereference(tnl_vport->mutable)))++;
178 static void port_table_remove_port(struct vport *vport)
180 struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
182 hlist_del_init_rcu(&tnl_vport->hash_node);
184 (*find_port_pool(rtnl_dereference(tnl_vport->mutable)))--;
187 static struct vport *port_table_lookup(struct port_lookup_key *key,
188 const struct tnl_mutable_config **pmutable)
190 struct hlist_node *n;
191 struct hlist_head *bucket;
192 u32 hash = port_hash(key);
193 struct tnl_vport *tnl_vport;
195 bucket = find_bucket(hash);
197 hlist_for_each_entry_rcu(tnl_vport, n, bucket, hash_node) {
198 struct tnl_mutable_config *mutable;
200 mutable = rcu_dereference_rtnl(tnl_vport->mutable);
201 if (!memcmp(&mutable->key, key, PORT_KEY_LEN)) {
203 return tnl_vport_to_vport(tnl_vport);
210 struct vport *ovs_tnl_find_port(struct net *net, __be32 saddr, __be32 daddr,
211 __be64 key, int tunnel_type,
212 const struct tnl_mutable_config **mutable)
214 struct port_lookup_key lookup;
216 bool is_multicast = ipv4_is_multicast(saddr);
218 port_key_set_net(&lookup, net);
219 lookup.saddr = saddr;
220 lookup.daddr = daddr;
222 /* First try for exact match on in_key. */
224 lookup.tunnel_type = tunnel_type | TNL_T_KEY_EXACT;
225 if (!is_multicast && key_local_remote_ports) {
226 vport = port_table_lookup(&lookup, mutable);
230 if (key_remote_ports) {
232 vport = port_table_lookup(&lookup, mutable);
236 lookup.saddr = saddr;
239 /* Then try matches that wildcard in_key. */
241 lookup.tunnel_type = tunnel_type | TNL_T_KEY_MATCH;
242 if (!is_multicast && local_remote_ports) {
243 vport = port_table_lookup(&lookup, mutable);
249 vport = port_table_lookup(&lookup, mutable);
256 lookup.daddr = saddr;
257 if (key_multicast_ports) {
258 lookup.tunnel_type = tunnel_type | TNL_T_KEY_EXACT;
260 vport = port_table_lookup(&lookup, mutable);
264 if (multicast_ports) {
265 lookup.tunnel_type = tunnel_type | TNL_T_KEY_MATCH;
267 vport = port_table_lookup(&lookup, mutable);
277 lookup.tunnel_type = tunnel_type;
278 vport = port_table_lookup(&lookup, mutable);
285 static void ecn_decapsulate(struct sk_buff *skb)
287 if (unlikely(INET_ECN_is_ce(OVS_CB(skb)->tun_key->ipv4_tos))) {
288 __be16 protocol = skb->protocol;
290 skb_set_network_header(skb, ETH_HLEN);
292 if (protocol == htons(ETH_P_8021Q)) {
293 if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
296 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
297 skb_set_network_header(skb, VLAN_ETH_HLEN);
300 if (protocol == htons(ETH_P_IP)) {
301 if (unlikely(!pskb_may_pull(skb, skb_network_offset(skb)
302 + sizeof(struct iphdr))))
305 IP_ECN_set_ce(ip_hdr(skb));
307 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
308 else if (protocol == htons(ETH_P_IPV6)) {
309 if (unlikely(!pskb_may_pull(skb, skb_network_offset(skb)
310 + sizeof(struct ipv6hdr))))
313 IP6_ECN_set_ce(ipv6_hdr(skb));
320 * ovs_tnl_rcv - ingress point for generic tunnel code
322 * @vport: port this packet was received on
323 * @skb: received packet
324 * @tos: ToS from encapsulating IP packet, used to copy ECN bits
326 * Must be called with rcu_read_lock.
328 * Packets received by this function are in the following state:
329 * - skb->data points to the inner Ethernet header.
330 * - The inner Ethernet header is in the linear data area.
331 * - skb->csum does not include the inner Ethernet header.
332 * - The layer pointers are undefined.
334 void ovs_tnl_rcv(struct vport *vport, struct sk_buff *skb)
338 skb_reset_mac_header(skb);
341 if (likely(ntohs(eh->h_proto) >= 1536))
342 skb->protocol = eh->h_proto;
344 skb->protocol = htons(ETH_P_802_2);
348 skb_clear_rxhash(skb);
351 ecn_decapsulate(skb);
352 vlan_set_tci(skb, 0);
354 if (unlikely(compute_ip_summed(skb, false))) {
359 ovs_vport_receive(vport, skb);
362 static struct rtable *find_route(struct net *net,
363 __be32 *saddr, __be32 daddr, u8 ipproto,
364 u8 tos, u32 skb_mark)
367 /* Tunnel configuration keeps DSCP part of TOS bits, But Linux
368 * router expect RT_TOS bits only. */
370 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
371 struct flowi fl = { .nl_u = { .ip4_u = {
374 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
377 .tos = RT_TOS(tos) } },
378 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
383 if (unlikely(ip_route_output_key(net, &rt, &fl)))
384 return ERR_PTR(-EADDRNOTAVAIL);
385 *saddr = fl.nl_u.ip4_u.saddr;
388 struct flowi4 fl = { .daddr = daddr,
390 .flowi4_tos = RT_TOS(tos),
391 .flowi4_mark = skb_mark,
392 .flowi4_proto = ipproto };
394 rt = ip_route_output_key(net, &fl);
400 static bool need_linearize(const struct sk_buff *skb)
404 if (unlikely(skb_shinfo(skb)->frag_list))
408 * Generally speaking we should linearize if there are paged frags.
409 * However, if all of the refcounts are 1 we know nobody else can
410 * change them from underneath us and we can skip the linearization.
412 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
413 if (unlikely(page_count(skb_frag_page(&skb_shinfo(skb)->frags[i])) > 1))
419 static struct sk_buff *handle_offloads(struct sk_buff *skb,
420 const struct tnl_mutable_config *mutable,
421 const struct rtable *rt,
427 min_headroom = LL_RESERVED_SPACE(rt_dst(rt).dev) + rt_dst(rt).header_len
429 + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0);
431 if (skb_headroom(skb) < min_headroom || skb_header_cloned(skb)) {
432 int head_delta = SKB_DATA_ALIGN(min_headroom -
435 err = pskb_expand_head(skb, max_t(int, head_delta, 0),
441 forward_ip_summed(skb, true);
443 if (skb_is_gso(skb)) {
444 struct sk_buff *nskb;
446 nskb = __skb_gso_segment(skb, 0, false);
455 } else if (get_ip_summed(skb) == OVS_CSUM_PARTIAL) {
456 /* Pages aren't locked and could change at any time.
457 * If this happens after we compute the checksum, the
458 * checksum will be wrong. We linearize now to avoid
461 if (unlikely(need_linearize(skb))) {
462 err = __skb_linearize(skb);
467 err = skb_checksum_help(skb);
472 set_ip_summed(skb, OVS_CSUM_NONE);
482 static int send_frags(struct sk_buff *skb,
489 struct sk_buff *next = skb->next;
490 int frag_len = skb->len - tunnel_hlen;
494 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
496 err = ip_local_out(skb);
498 if (unlikely(net_xmit_eval(err)))
500 sent_len += frag_len;
507 * There's no point in continuing to send fragments once one has been
508 * dropped so just free the rest. This may help improve the congestion
509 * that caused the first packet to be dropped.
511 ovs_tnl_free_linked_skbs(skb);
515 /* Compute source UDP port for outgoing packet.
516 * Currently we use the flow hash.
518 u16 ovs_tnl_get_src_port(struct sk_buff *skb)
523 u32 hash = OVS_CB(skb)->flow->hash;
525 inet_get_local_port_range(&low, &high);
526 range = (high - low) + 1;
527 return (((u64) hash * range) >> 32) + low;
530 int ovs_tnl_send(struct vport *vport, struct sk_buff *skb)
532 struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
533 const struct tnl_mutable_config *mutable = rcu_dereference(tnl_vport->mutable);
534 enum vport_err_type err = VPORT_E_TX_ERROR;
536 struct ovs_key_ipv4_tunnel tun_key;
546 /* Validate the protocol headers before we try to use them. */
547 if (skb->protocol == htons(ETH_P_8021Q) &&
548 !vlan_tx_tag_present(skb)) {
549 if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
552 skb->protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
553 skb_set_network_header(skb, VLAN_ETH_HLEN);
556 if (skb->protocol == htons(ETH_P_IP)) {
557 if (unlikely(!pskb_may_pull(skb, skb_network_offset(skb)
558 + sizeof(struct iphdr))))
561 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
562 else if (skb->protocol == htons(ETH_P_IPV6)) {
563 if (unlikely(!pskb_may_pull(skb, skb_network_offset(skb)
564 + sizeof(struct ipv6hdr))))
569 /* If OVS_CB(skb)->tun_key is NULL, point it at the local tun_key here,
572 if (!OVS_CB(skb)->tun_key) {
573 memset(&tun_key, 0, sizeof(tun_key));
574 OVS_CB(skb)->tun_key = &tun_key;
577 tunnel_hlen = tnl_vport->tnl_ops->hdr_len(mutable, OVS_CB(skb)->tun_key);
578 if (unlikely(tunnel_hlen < 0)) {
579 err = VPORT_E_TX_DROPPED;
582 tunnel_hlen += sizeof(struct iphdr);
584 if (OVS_CB(skb)->tun_key->ipv4_dst) {
585 daddr = OVS_CB(skb)->tun_key->ipv4_dst;
586 saddr = OVS_CB(skb)->tun_key->ipv4_src;
587 tos = OVS_CB(skb)->tun_key->ipv4_tos;
588 ttl = OVS_CB(skb)->tun_key->ipv4_ttl;
589 frag_off = OVS_CB(skb)->tun_key->tun_flags &
590 OVS_TNL_F_DONT_FRAGMENT ? htons(IP_DF) : 0;
593 daddr = mutable->key.daddr;
594 saddr = mutable->key.saddr;
596 if (unlikely(!daddr)) {
597 /* Trying to sent packet from Null-port without
598 * tunnel info? Drop this packet. */
599 err = VPORT_E_TX_DROPPED;
604 if (skb->protocol == htons(ETH_P_IP))
605 inner_tos = ip_hdr(skb)->tos;
606 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
607 else if (skb->protocol == htons(ETH_P_IPV6))
608 inner_tos = ipv6_get_dsfield(ipv6_hdr(skb));
613 if (mutable->flags & TNL_F_TOS_INHERIT)
618 tos = INET_ECN_encapsulate(tos, inner_tos);
622 if (mutable->flags & TNL_F_TTL_INHERIT) {
623 if (skb->protocol == htons(ETH_P_IP))
624 ttl = ip_hdr(skb)->ttl;
625 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
626 else if (skb->protocol == htons(ETH_P_IPV6))
627 ttl = ipv6_hdr(skb)->hop_limit;
631 frag_off = mutable->flags & TNL_F_DF_DEFAULT ? htons(IP_DF) : 0;
635 skb_mark = skb_get_mark(skb);
636 rt = find_route(port_key_get_net(&mutable->key), &saddr, daddr,
637 tnl_vport->tnl_ops->ipproto, tos, skb_mark);
645 skb_clear_rxhash(skb);
648 skb = handle_offloads(skb, mutable, rt, tunnel_hlen);
655 if (!OVS_CB(skb)->tun_key->ipv4_dst) {
656 if (!(mutable->flags & TNL_F_TTL_INHERIT)) {
658 ttl = ip4_dst_hoplimit(&rt_dst(rt));
664 struct sk_buff *next_skb = skb->next;
667 if (unlikely(vlan_deaccel_tag(skb)))
670 skb_push(skb, tunnel_hlen);
671 skb_reset_network_header(skb);
672 skb_set_transport_header(skb, sizeof(struct iphdr));
675 skb_dst_set(skb, dst_clone(&rt_dst(rt)));
677 skb_dst_set(skb, &rt_dst(rt));
679 /* Push IP header. */
682 iph->ihl = sizeof(struct iphdr) >> 2;
683 iph->protocol = tnl_vport->tnl_ops->ipproto;
688 iph->frag_off = frag_off;
689 ip_select_ident(iph, &rt_dst(rt), NULL);
691 /* Push Tunnel header. */
692 skb = tnl_vport->tnl_ops->build_header(vport, mutable,
693 &rt_dst(rt), skb, tunnel_hlen);
697 sent_len += send_frags(skb, tunnel_hlen);
703 if (unlikely(sent_len == 0))
704 ovs_vport_record_error(vport, VPORT_E_TX_DROPPED);
711 ovs_tnl_free_linked_skbs(skb);
712 ovs_vport_record_error(vport, err);
716 static const struct nla_policy tnl_policy[OVS_TUNNEL_ATTR_MAX + 1] = {
717 [OVS_TUNNEL_ATTR_FLAGS] = { .type = NLA_U32 },
718 [OVS_TUNNEL_ATTR_DST_IPV4] = { .type = NLA_U32 },
719 [OVS_TUNNEL_ATTR_SRC_IPV4] = { .type = NLA_U32 },
720 [OVS_TUNNEL_ATTR_OUT_KEY] = { .type = NLA_U64 },
721 [OVS_TUNNEL_ATTR_IN_KEY] = { .type = NLA_U64 },
722 [OVS_TUNNEL_ATTR_TOS] = { .type = NLA_U8 },
723 [OVS_TUNNEL_ATTR_TTL] = { .type = NLA_U8 },
724 [OVS_TUNNEL_ATTR_DST_PORT] = { .type = NLA_U16 },
727 /* Sets OVS_TUNNEL_ATTR_* fields in 'mutable', which must initially be
729 static int tnl_set_config(struct net *net, struct nlattr *options,
730 const struct tnl_ops *tnl_ops,
731 const struct vport *cur_vport,
732 struct tnl_mutable_config *mutable)
734 const struct vport *old_vport;
735 const struct tnl_mutable_config *old_mutable;
736 struct nlattr *a[OVS_TUNNEL_ATTR_MAX + 1];
739 port_key_set_net(&mutable->key, net);
740 mutable->key.tunnel_type = tnl_ops->tunnel_type;
744 err = nla_parse_nested(a, OVS_TUNNEL_ATTR_MAX, options, tnl_policy);
748 /* Process attributes possibly useful for null_ports first */
749 if (a[OVS_TUNNEL_ATTR_DST_PORT])
751 htons(nla_get_u16(a[OVS_TUNNEL_ATTR_DST_PORT]));
753 if (a[OVS_TUNNEL_ATTR_DST_IPV4])
754 mutable->key.daddr = nla_get_be32(a[OVS_TUNNEL_ATTR_DST_IPV4]);
756 /* Skip the rest if configuring a null_port */
757 if (!mutable->key.daddr)
760 if (a[OVS_TUNNEL_ATTR_FLAGS])
761 mutable->flags = nla_get_u32(a[OVS_TUNNEL_ATTR_FLAGS])
764 if (a[OVS_TUNNEL_ATTR_SRC_IPV4]) {
765 if (ipv4_is_multicast(mutable->key.daddr))
767 mutable->key.saddr = nla_get_be32(a[OVS_TUNNEL_ATTR_SRC_IPV4]);
770 if (a[OVS_TUNNEL_ATTR_TOS]) {
771 mutable->tos = nla_get_u8(a[OVS_TUNNEL_ATTR_TOS]);
772 /* Reject ToS config with ECN bits set. */
773 if (mutable->tos & INET_ECN_MASK)
777 if (a[OVS_TUNNEL_ATTR_TTL])
778 mutable->ttl = nla_get_u8(a[OVS_TUNNEL_ATTR_TTL]);
780 if (!a[OVS_TUNNEL_ATTR_IN_KEY]) {
781 mutable->key.tunnel_type |= TNL_T_KEY_MATCH;
782 mutable->flags |= TNL_F_IN_KEY_MATCH;
784 mutable->key.tunnel_type |= TNL_T_KEY_EXACT;
785 mutable->key.in_key = nla_get_be64(a[OVS_TUNNEL_ATTR_IN_KEY]);
788 if (!a[OVS_TUNNEL_ATTR_OUT_KEY])
789 mutable->flags |= TNL_F_OUT_KEY_ACTION;
791 mutable->out_key = nla_get_be64(a[OVS_TUNNEL_ATTR_OUT_KEY]);
794 if (ipv4_is_multicast(mutable->key.daddr)) {
795 struct net_device *dev;
797 __be32 saddr = mutable->key.saddr;
799 rt = find_route(port_key_get_net(&mutable->key),
800 &saddr, mutable->key.daddr,
801 tnl_ops->ipproto, mutable->tos, 0);
803 return -EADDRNOTAVAIL;
804 dev = rt_dst(rt).dev;
806 if (__in_dev_get_rtnl(dev) == NULL)
807 return -EADDRNOTAVAIL;
808 mutable->mlink = dev->ifindex;
809 ip_mc_inc_group(__in_dev_get_rtnl(dev), mutable->key.daddr);
813 old_vport = port_table_lookup(&mutable->key, &old_mutable);
814 if (old_vport && old_vport != cur_vport)
820 struct vport *ovs_tnl_create(const struct vport_parms *parms,
821 const struct vport_ops *vport_ops,
822 const struct tnl_ops *tnl_ops)
825 struct tnl_vport *tnl_vport;
826 struct tnl_mutable_config *mutable;
829 vport = ovs_vport_alloc(sizeof(struct tnl_vport), vport_ops, parms);
831 err = PTR_ERR(vport);
835 tnl_vport = tnl_vport_priv(vport);
837 strcpy(tnl_vport->name, parms->name);
838 tnl_vport->tnl_ops = tnl_ops;
840 mutable = kzalloc(sizeof(struct tnl_mutable_config), GFP_KERNEL);
843 goto error_free_vport;
846 err = tnl_set_config(ovs_dp_get_net(parms->dp), parms->options, tnl_ops,
849 goto error_free_mutable;
851 rcu_assign_pointer(tnl_vport->mutable, mutable);
853 port_table_add_port(vport);
857 free_mutable_rtnl(mutable);
860 ovs_vport_free(vport);
865 int ovs_tnl_set_options(struct vport *vport, struct nlattr *options)
867 struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
868 const struct tnl_mutable_config *old_mutable;
869 struct tnl_mutable_config *mutable;
872 old_mutable = rtnl_dereference(tnl_vport->mutable);
873 if (!old_mutable->key.daddr)
876 mutable = kzalloc(sizeof(struct tnl_mutable_config), GFP_KERNEL);
882 /* Parse the others configured by userspace. */
883 err = tnl_set_config(ovs_dp_get_net(vport->dp), options, tnl_vport->tnl_ops,
888 if (port_hash(&mutable->key) != port_hash(&old_mutable->key))
889 port_table_move_port(vport, mutable);
891 assign_config_rcu(vport, mutable);
896 free_mutable_rtnl(mutable);
902 int ovs_tnl_get_options(const struct vport *vport, struct sk_buff *skb)
904 const struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
905 const struct tnl_mutable_config *mutable = rcu_dereference_rtnl(tnl_vport->mutable);
907 if (mutable->dst_port && nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT,
908 ntohs(mutable->dst_port)))
909 goto nla_put_failure;
911 /* Skip the rest for null_ports */
912 if (!mutable->key.daddr)
915 if (nla_put_be32(skb, OVS_TUNNEL_ATTR_DST_IPV4, mutable->key.daddr))
916 goto nla_put_failure;
917 if (nla_put_u32(skb, OVS_TUNNEL_ATTR_FLAGS,
918 mutable->flags & TNL_F_PUBLIC))
919 goto nla_put_failure;
920 if (!(mutable->flags & TNL_F_IN_KEY_MATCH) &&
921 nla_put_be64(skb, OVS_TUNNEL_ATTR_IN_KEY, mutable->key.in_key))
922 goto nla_put_failure;
923 if (!(mutable->flags & TNL_F_OUT_KEY_ACTION) &&
924 nla_put_be64(skb, OVS_TUNNEL_ATTR_OUT_KEY, mutable->out_key))
925 goto nla_put_failure;
926 if (mutable->key.saddr &&
927 nla_put_be32(skb, OVS_TUNNEL_ATTR_SRC_IPV4, mutable->key.saddr))
928 goto nla_put_failure;
929 if (mutable->tos && nla_put_u8(skb, OVS_TUNNEL_ATTR_TOS, mutable->tos))
930 goto nla_put_failure;
931 if (mutable->ttl && nla_put_u8(skb, OVS_TUNNEL_ATTR_TTL, mutable->ttl))
932 goto nla_put_failure;
940 static void free_port_rcu(struct rcu_head *rcu)
942 struct tnl_vport *tnl_vport = container_of(rcu,
943 struct tnl_vport, rcu);
945 kfree((struct tnl_mutable __force *)tnl_vport->mutable);
946 ovs_vport_free(tnl_vport_to_vport(tnl_vport));
949 void ovs_tnl_destroy(struct vport *vport)
951 struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
952 struct tnl_mutable_config *mutable;
954 mutable = rtnl_dereference(tnl_vport->mutable);
955 port_table_remove_port(vport);
956 free_mutable_rtnl(mutable);
957 call_rcu(&tnl_vport->rcu, free_port_rcu);
960 const char *ovs_tnl_get_name(const struct vport *vport)
962 const struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
963 return tnl_vport->name;
966 void ovs_tnl_free_linked_skbs(struct sk_buff *skb)
969 struct sk_buff *next = skb->next;
975 int ovs_tnl_init(void)
979 port_table = kmalloc(PORT_TABLE_SIZE * sizeof(struct hlist_head *),
984 for (i = 0; i < PORT_TABLE_SIZE; i++)
985 INIT_HLIST_HEAD(&port_table[i]);
990 void ovs_tnl_exit(void)