2 * VXLAN: Virtual eXtensible Local Area Network
4 * Copyright (c) 2012-2013 Vyatta Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <linux/module.h>
16 #include <linux/errno.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/rculist.h>
20 #include <linux/netdevice.h>
23 #include <linux/udp.h>
24 #include <linux/igmp.h>
25 #include <linux/etherdevice.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/hash.h>
29 #include <linux/ethtool.h>
31 #include <net/ndisc.h>
33 #include <net/ip_tunnels.h>
36 #include <net/udp_tunnel.h>
37 #include <net/rtnetlink.h>
38 #include <net/route.h>
39 #include <net/dsfield.h>
40 #include <net/inet_ecn.h>
41 #include <net/net_namespace.h>
42 #include <net/netns/generic.h>
43 #include <net/vxlan.h>
44 #include <net/protocol.h>
46 #if IS_ENABLED(CONFIG_IPV6)
48 #include <net/addrconf.h>
49 #include <net/ip6_tunnel.h>
50 #include <net/ip6_checksum.h>
52 #include <net/dst_metadata.h>
54 #define VXLAN_VERSION "0.1"
56 #define PORT_HASH_BITS 8
57 #define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
58 #define FDB_AGE_DEFAULT 300 /* 5 min */
59 #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
61 /* UDP port for VXLAN traffic.
62 * The IANA assigned port is 4789, but the Linux default is 8472
63 * for compatibility with early adopters.
65 static unsigned short vxlan_port __read_mostly
= 8472;
66 module_param_named(udp_port
, vxlan_port
, ushort
, 0444);
67 MODULE_PARM_DESC(udp_port
, "Destination UDP port");
69 static bool log_ecn_error
= true;
70 module_param(log_ecn_error
, bool, 0644);
71 MODULE_PARM_DESC(log_ecn_error
, "Log packets received with corrupted ECN");
73 static int vxlan_net_id
;
74 static struct rtnl_link_ops vxlan_link_ops
;
76 static const u8 all_zeros_mac
[ETH_ALEN
+ 2];
78 static int vxlan_sock_add(struct vxlan_dev
*vxlan
);
80 /* per-network namespace private data for this module */
82 struct list_head vxlan_list
;
83 struct hlist_head sock_list
[PORT_HASH_SIZE
];
87 /* Forwarding table entry */
89 struct hlist_node hlist
; /* linked list of entries */
91 unsigned long updated
; /* jiffies */
93 struct list_head remotes
;
94 u8 eth_addr
[ETH_ALEN
];
95 u16 state
; /* see ndm_state */
96 u8 flags
; /* see ndm_flags */
99 /* salt for hash table */
100 static u32 vxlan_salt __read_mostly
;
101 static struct workqueue_struct
*vxlan_wq
;
103 static inline bool vxlan_collect_metadata(struct vxlan_sock
*vs
)
105 return vs
->flags
& VXLAN_F_COLLECT_METADATA
||
106 ip_tunnel_collect_metadata();
109 #if IS_ENABLED(CONFIG_IPV6)
111 bool vxlan_addr_equal(const union vxlan_addr
*a
, const union vxlan_addr
*b
)
113 if (a
->sa
.sa_family
!= b
->sa
.sa_family
)
115 if (a
->sa
.sa_family
== AF_INET6
)
116 return ipv6_addr_equal(&a
->sin6
.sin6_addr
, &b
->sin6
.sin6_addr
);
118 return a
->sin
.sin_addr
.s_addr
== b
->sin
.sin_addr
.s_addr
;
121 static inline bool vxlan_addr_any(const union vxlan_addr
*ipa
)
123 if (ipa
->sa
.sa_family
== AF_INET6
)
124 return ipv6_addr_any(&ipa
->sin6
.sin6_addr
);
126 return ipa
->sin
.sin_addr
.s_addr
== htonl(INADDR_ANY
);
129 static inline bool vxlan_addr_multicast(const union vxlan_addr
*ipa
)
131 if (ipa
->sa
.sa_family
== AF_INET6
)
132 return ipv6_addr_is_multicast(&ipa
->sin6
.sin6_addr
);
134 return IN_MULTICAST(ntohl(ipa
->sin
.sin_addr
.s_addr
));
137 static int vxlan_nla_get_addr(union vxlan_addr
*ip
, struct nlattr
*nla
)
139 if (nla_len(nla
) >= sizeof(struct in6_addr
)) {
140 ip
->sin6
.sin6_addr
= nla_get_in6_addr(nla
);
141 ip
->sa
.sa_family
= AF_INET6
;
143 } else if (nla_len(nla
) >= sizeof(__be32
)) {
144 ip
->sin
.sin_addr
.s_addr
= nla_get_in_addr(nla
);
145 ip
->sa
.sa_family
= AF_INET
;
148 return -EAFNOSUPPORT
;
152 static int vxlan_nla_put_addr(struct sk_buff
*skb
, int attr
,
153 const union vxlan_addr
*ip
)
155 if (ip
->sa
.sa_family
== AF_INET6
)
156 return nla_put_in6_addr(skb
, attr
, &ip
->sin6
.sin6_addr
);
158 return nla_put_in_addr(skb
, attr
, ip
->sin
.sin_addr
.s_addr
);
161 #else /* !CONFIG_IPV6 */
164 bool vxlan_addr_equal(const union vxlan_addr
*a
, const union vxlan_addr
*b
)
166 return a
->sin
.sin_addr
.s_addr
== b
->sin
.sin_addr
.s_addr
;
169 static inline bool vxlan_addr_any(const union vxlan_addr
*ipa
)
171 return ipa
->sin
.sin_addr
.s_addr
== htonl(INADDR_ANY
);
174 static inline bool vxlan_addr_multicast(const union vxlan_addr
*ipa
)
176 return IN_MULTICAST(ntohl(ipa
->sin
.sin_addr
.s_addr
));
179 static int vxlan_nla_get_addr(union vxlan_addr
*ip
, struct nlattr
*nla
)
181 if (nla_len(nla
) >= sizeof(struct in6_addr
)) {
182 return -EAFNOSUPPORT
;
183 } else if (nla_len(nla
) >= sizeof(__be32
)) {
184 ip
->sin
.sin_addr
.s_addr
= nla_get_in_addr(nla
);
185 ip
->sa
.sa_family
= AF_INET
;
188 return -EAFNOSUPPORT
;
192 static int vxlan_nla_put_addr(struct sk_buff
*skb
, int attr
,
193 const union vxlan_addr
*ip
)
195 return nla_put_in_addr(skb
, attr
, ip
->sin
.sin_addr
.s_addr
);
199 /* Virtual Network hash table head */
200 static inline struct hlist_head
*vni_head(struct vxlan_sock
*vs
, __be32 vni
)
202 return &vs
->vni_list
[hash_32((__force u32
)vni
, VNI_HASH_BITS
)];
205 /* Socket hash table head */
206 static inline struct hlist_head
*vs_head(struct net
*net
, __be16 port
)
208 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
210 return &vn
->sock_list
[hash_32(ntohs(port
), PORT_HASH_BITS
)];
213 /* First remote destination for a forwarding entry.
214 * Guaranteed to be non-NULL because remotes are never deleted.
216 static inline struct vxlan_rdst
*first_remote_rcu(struct vxlan_fdb
*fdb
)
218 return list_entry_rcu(fdb
->remotes
.next
, struct vxlan_rdst
, list
);
221 static inline struct vxlan_rdst
*first_remote_rtnl(struct vxlan_fdb
*fdb
)
223 return list_first_entry(&fdb
->remotes
, struct vxlan_rdst
, list
);
226 /* Find VXLAN socket based on network namespace, address family and UDP port
227 * and enabled unshareable flags.
229 static struct vxlan_sock
*vxlan_find_sock(struct net
*net
, sa_family_t family
,
230 __be16 port
, u32 flags
)
232 struct vxlan_sock
*vs
;
234 flags
&= VXLAN_F_RCV_FLAGS
;
236 hlist_for_each_entry_rcu(vs
, vs_head(net
, port
), hlist
) {
237 if (inet_sk(vs
->sock
->sk
)->inet_sport
== port
&&
238 vxlan_get_sk_family(vs
) == family
&&
245 static struct vxlan_dev
*vxlan_vs_find_vni(struct vxlan_sock
*vs
, __be32 vni
)
247 struct vxlan_dev
*vxlan
;
249 /* For flow based devices, map all packets to VNI 0 */
250 if (vs
->flags
& VXLAN_F_COLLECT_METADATA
)
253 hlist_for_each_entry_rcu(vxlan
, vni_head(vs
, vni
), hlist
) {
254 if (vxlan
->default_dst
.remote_vni
== vni
)
261 /* Look up VNI in a per net namespace table */
262 static struct vxlan_dev
*vxlan_find_vni(struct net
*net
, __be32 vni
,
263 sa_family_t family
, __be16 port
,
266 struct vxlan_sock
*vs
;
268 vs
= vxlan_find_sock(net
, family
, port
, flags
);
272 return vxlan_vs_find_vni(vs
, vni
);
275 /* Fill in neighbour message in skbuff. */
276 static int vxlan_fdb_info(struct sk_buff
*skb
, struct vxlan_dev
*vxlan
,
277 const struct vxlan_fdb
*fdb
,
278 u32 portid
, u32 seq
, int type
, unsigned int flags
,
279 const struct vxlan_rdst
*rdst
)
281 unsigned long now
= jiffies
;
282 struct nda_cacheinfo ci
;
283 struct nlmsghdr
*nlh
;
285 bool send_ip
, send_eth
;
287 nlh
= nlmsg_put(skb
, portid
, seq
, type
, sizeof(*ndm
), flags
);
291 ndm
= nlmsg_data(nlh
);
292 memset(ndm
, 0, sizeof(*ndm
));
294 send_eth
= send_ip
= true;
296 if (type
== RTM_GETNEIGH
) {
297 ndm
->ndm_family
= AF_INET
;
298 send_ip
= !vxlan_addr_any(&rdst
->remote_ip
);
299 send_eth
= !is_zero_ether_addr(fdb
->eth_addr
);
301 ndm
->ndm_family
= AF_BRIDGE
;
302 ndm
->ndm_state
= fdb
->state
;
303 ndm
->ndm_ifindex
= vxlan
->dev
->ifindex
;
304 ndm
->ndm_flags
= fdb
->flags
;
305 ndm
->ndm_type
= RTN_UNICAST
;
307 if (!net_eq(dev_net(vxlan
->dev
), vxlan
->net
) &&
308 nla_put_s32(skb
, NDA_LINK_NETNSID
,
309 peernet2id_alloc(dev_net(vxlan
->dev
), vxlan
->net
)))
310 goto nla_put_failure
;
312 if (send_eth
&& nla_put(skb
, NDA_LLADDR
, ETH_ALEN
, &fdb
->eth_addr
))
313 goto nla_put_failure
;
315 if (send_ip
&& vxlan_nla_put_addr(skb
, NDA_DST
, &rdst
->remote_ip
))
316 goto nla_put_failure
;
318 if (rdst
->remote_port
&& rdst
->remote_port
!= vxlan
->cfg
.dst_port
&&
319 nla_put_be16(skb
, NDA_PORT
, rdst
->remote_port
))
320 goto nla_put_failure
;
321 if (rdst
->remote_vni
!= vxlan
->default_dst
.remote_vni
&&
322 nla_put_u32(skb
, NDA_VNI
, be32_to_cpu(rdst
->remote_vni
)))
323 goto nla_put_failure
;
324 if (rdst
->remote_ifindex
&&
325 nla_put_u32(skb
, NDA_IFINDEX
, rdst
->remote_ifindex
))
326 goto nla_put_failure
;
328 ci
.ndm_used
= jiffies_to_clock_t(now
- fdb
->used
);
329 ci
.ndm_confirmed
= 0;
330 ci
.ndm_updated
= jiffies_to_clock_t(now
- fdb
->updated
);
333 if (nla_put(skb
, NDA_CACHEINFO
, sizeof(ci
), &ci
))
334 goto nla_put_failure
;
340 nlmsg_cancel(skb
, nlh
);
344 static inline size_t vxlan_nlmsg_size(void)
346 return NLMSG_ALIGN(sizeof(struct ndmsg
))
347 + nla_total_size(ETH_ALEN
) /* NDA_LLADDR */
348 + nla_total_size(sizeof(struct in6_addr
)) /* NDA_DST */
349 + nla_total_size(sizeof(__be16
)) /* NDA_PORT */
350 + nla_total_size(sizeof(__be32
)) /* NDA_VNI */
351 + nla_total_size(sizeof(__u32
)) /* NDA_IFINDEX */
352 + nla_total_size(sizeof(__s32
)) /* NDA_LINK_NETNSID */
353 + nla_total_size(sizeof(struct nda_cacheinfo
));
356 static void vxlan_fdb_notify(struct vxlan_dev
*vxlan
, struct vxlan_fdb
*fdb
,
357 struct vxlan_rdst
*rd
, int type
)
359 struct net
*net
= dev_net(vxlan
->dev
);
363 skb
= nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC
);
367 err
= vxlan_fdb_info(skb
, vxlan
, fdb
, 0, 0, type
, 0, rd
);
369 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
370 WARN_ON(err
== -EMSGSIZE
);
375 rtnl_notify(skb
, net
, 0, RTNLGRP_NEIGH
, NULL
, GFP_ATOMIC
);
379 rtnl_set_sk_err(net
, RTNLGRP_NEIGH
, err
);
382 static void vxlan_ip_miss(struct net_device
*dev
, union vxlan_addr
*ipa
)
384 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
385 struct vxlan_fdb f
= {
388 struct vxlan_rdst remote
= {
389 .remote_ip
= *ipa
, /* goes to NDA_DST */
390 .remote_vni
= cpu_to_be32(VXLAN_N_VID
),
393 vxlan_fdb_notify(vxlan
, &f
, &remote
, RTM_GETNEIGH
);
396 static void vxlan_fdb_miss(struct vxlan_dev
*vxlan
, const u8 eth_addr
[ETH_ALEN
])
398 struct vxlan_fdb f
= {
401 struct vxlan_rdst remote
= { };
403 memcpy(f
.eth_addr
, eth_addr
, ETH_ALEN
);
405 vxlan_fdb_notify(vxlan
, &f
, &remote
, RTM_GETNEIGH
);
408 /* Hash Ethernet address */
409 static u32
eth_hash(const unsigned char *addr
)
411 u64 value
= get_unaligned((u64
*)addr
);
413 /* only want 6 bytes */
419 return hash_64(value
, FDB_HASH_BITS
);
422 /* Hash chain to use given mac address */
423 static inline struct hlist_head
*vxlan_fdb_head(struct vxlan_dev
*vxlan
,
426 return &vxlan
->fdb_head
[eth_hash(mac
)];
429 /* Look up Ethernet address in forwarding table */
430 static struct vxlan_fdb
*__vxlan_find_mac(struct vxlan_dev
*vxlan
,
433 struct hlist_head
*head
= vxlan_fdb_head(vxlan
, mac
);
436 hlist_for_each_entry_rcu(f
, head
, hlist
) {
437 if (ether_addr_equal(mac
, f
->eth_addr
))
444 static struct vxlan_fdb
*vxlan_find_mac(struct vxlan_dev
*vxlan
,
449 f
= __vxlan_find_mac(vxlan
, mac
);
456 /* caller should hold vxlan->hash_lock */
457 static struct vxlan_rdst
*vxlan_fdb_find_rdst(struct vxlan_fdb
*f
,
458 union vxlan_addr
*ip
, __be16 port
,
459 __be32 vni
, __u32 ifindex
)
461 struct vxlan_rdst
*rd
;
463 list_for_each_entry(rd
, &f
->remotes
, list
) {
464 if (vxlan_addr_equal(&rd
->remote_ip
, ip
) &&
465 rd
->remote_port
== port
&&
466 rd
->remote_vni
== vni
&&
467 rd
->remote_ifindex
== ifindex
)
474 /* Replace destination of unicast mac */
475 static int vxlan_fdb_replace(struct vxlan_fdb
*f
,
476 union vxlan_addr
*ip
, __be16 port
, __be32 vni
,
479 struct vxlan_rdst
*rd
;
481 rd
= vxlan_fdb_find_rdst(f
, ip
, port
, vni
, ifindex
);
485 rd
= list_first_entry_or_null(&f
->remotes
, struct vxlan_rdst
, list
);
489 dst_cache_reset(&rd
->dst_cache
);
491 rd
->remote_port
= port
;
492 rd
->remote_vni
= vni
;
493 rd
->remote_ifindex
= ifindex
;
497 /* Add/update destinations for multicast */
498 static int vxlan_fdb_append(struct vxlan_fdb
*f
,
499 union vxlan_addr
*ip
, __be16 port
, __be32 vni
,
500 __u32 ifindex
, struct vxlan_rdst
**rdp
)
502 struct vxlan_rdst
*rd
;
504 rd
= vxlan_fdb_find_rdst(f
, ip
, port
, vni
, ifindex
);
508 rd
= kmalloc(sizeof(*rd
), GFP_ATOMIC
);
512 if (dst_cache_init(&rd
->dst_cache
, GFP_ATOMIC
)) {
518 rd
->remote_port
= port
;
519 rd
->remote_vni
= vni
;
520 rd
->remote_ifindex
= ifindex
;
522 list_add_tail_rcu(&rd
->list
, &f
->remotes
);
528 static struct vxlanhdr
*vxlan_gro_remcsum(struct sk_buff
*skb
,
530 struct vxlanhdr
*vh
, size_t hdrlen
,
532 struct gro_remcsum
*grc
,
535 size_t start
, offset
;
537 if (skb
->remcsum_offload
)
540 if (!NAPI_GRO_CB(skb
)->csum_valid
)
543 start
= vxlan_rco_start(vni_field
);
544 offset
= start
+ vxlan_rco_offset(vni_field
);
546 vh
= skb_gro_remcsum_process(skb
, (void *)vh
, off
, hdrlen
,
547 start
, offset
, grc
, nopartial
);
549 skb
->remcsum_offload
= 1;
554 static struct sk_buff
**vxlan_gro_receive(struct sock
*sk
,
555 struct sk_buff
**head
,
558 struct sk_buff
*p
, **pp
= NULL
;
559 struct vxlanhdr
*vh
, *vh2
;
560 unsigned int hlen
, off_vx
;
562 struct vxlan_sock
*vs
= rcu_dereference_sk_user_data(sk
);
564 struct gro_remcsum grc
;
566 skb_gro_remcsum_init(&grc
);
568 off_vx
= skb_gro_offset(skb
);
569 hlen
= off_vx
+ sizeof(*vh
);
570 vh
= skb_gro_header_fast(skb
, off_vx
);
571 if (skb_gro_header_hard(skb
, hlen
)) {
572 vh
= skb_gro_header_slow(skb
, hlen
, off_vx
);
577 skb_gro_postpull_rcsum(skb
, vh
, sizeof(struct vxlanhdr
));
579 flags
= vh
->vx_flags
;
581 if ((flags
& VXLAN_HF_RCO
) && (vs
->flags
& VXLAN_F_REMCSUM_RX
)) {
582 vh
= vxlan_gro_remcsum(skb
, off_vx
, vh
, sizeof(struct vxlanhdr
),
585 VXLAN_F_REMCSUM_NOPARTIAL
));
591 skb_gro_pull(skb
, sizeof(struct vxlanhdr
)); /* pull vxlan header */
593 for (p
= *head
; p
; p
= p
->next
) {
594 if (!NAPI_GRO_CB(p
)->same_flow
)
597 vh2
= (struct vxlanhdr
*)(p
->data
+ off_vx
);
598 if (vh
->vx_flags
!= vh2
->vx_flags
||
599 vh
->vx_vni
!= vh2
->vx_vni
) {
600 NAPI_GRO_CB(p
)->same_flow
= 0;
605 pp
= eth_gro_receive(head
, skb
);
609 skb_gro_remcsum_cleanup(skb
, &grc
);
610 NAPI_GRO_CB(skb
)->flush
|= flush
;
615 static int vxlan_gro_complete(struct sock
*sk
, struct sk_buff
*skb
, int nhoff
)
617 udp_tunnel_gro_complete(skb
, nhoff
);
619 return eth_gro_complete(skb
, nhoff
+ sizeof(struct vxlanhdr
));
622 /* Notify netdevs that UDP port started listening */
623 static void vxlan_notify_add_rx_port(struct vxlan_sock
*vs
)
625 struct net_device
*dev
;
626 struct sock
*sk
= vs
->sock
->sk
;
627 struct net
*net
= sock_net(sk
);
628 sa_family_t sa_family
= vxlan_get_sk_family(vs
);
629 __be16 port
= inet_sk(sk
)->inet_sport
;
632 for_each_netdev_rcu(net
, dev
) {
633 if (dev
->netdev_ops
->ndo_add_vxlan_port
)
634 dev
->netdev_ops
->ndo_add_vxlan_port(dev
, sa_family
,
640 /* Notify netdevs that UDP port is no more listening */
641 static void vxlan_notify_del_rx_port(struct vxlan_sock
*vs
)
643 struct net_device
*dev
;
644 struct sock
*sk
= vs
->sock
->sk
;
645 struct net
*net
= sock_net(sk
);
646 sa_family_t sa_family
= vxlan_get_sk_family(vs
);
647 __be16 port
= inet_sk(sk
)->inet_sport
;
650 for_each_netdev_rcu(net
, dev
) {
651 if (dev
->netdev_ops
->ndo_del_vxlan_port
)
652 dev
->netdev_ops
->ndo_del_vxlan_port(dev
, sa_family
,
658 /* Add new entry to forwarding table -- assumes lock held */
659 static int vxlan_fdb_create(struct vxlan_dev
*vxlan
,
660 const u8
*mac
, union vxlan_addr
*ip
,
661 __u16 state
, __u16 flags
,
662 __be16 port
, __be32 vni
, __u32 ifindex
,
665 struct vxlan_rdst
*rd
= NULL
;
669 f
= __vxlan_find_mac(vxlan
, mac
);
671 if (flags
& NLM_F_EXCL
) {
672 netdev_dbg(vxlan
->dev
,
673 "lost race to create %pM\n", mac
);
676 if (f
->state
!= state
) {
678 f
->updated
= jiffies
;
681 if (f
->flags
!= ndm_flags
) {
682 f
->flags
= ndm_flags
;
683 f
->updated
= jiffies
;
686 if ((flags
& NLM_F_REPLACE
)) {
687 /* Only change unicasts */
688 if (!(is_multicast_ether_addr(f
->eth_addr
) ||
689 is_zero_ether_addr(f
->eth_addr
))) {
690 notify
|= vxlan_fdb_replace(f
, ip
, port
, vni
,
695 if ((flags
& NLM_F_APPEND
) &&
696 (is_multicast_ether_addr(f
->eth_addr
) ||
697 is_zero_ether_addr(f
->eth_addr
))) {
698 int rc
= vxlan_fdb_append(f
, ip
, port
, vni
, ifindex
,
706 if (!(flags
& NLM_F_CREATE
))
709 if (vxlan
->cfg
.addrmax
&&
710 vxlan
->addrcnt
>= vxlan
->cfg
.addrmax
)
713 /* Disallow replace to add a multicast entry */
714 if ((flags
& NLM_F_REPLACE
) &&
715 (is_multicast_ether_addr(mac
) || is_zero_ether_addr(mac
)))
718 netdev_dbg(vxlan
->dev
, "add %pM -> %pIS\n", mac
, ip
);
719 f
= kmalloc(sizeof(*f
), GFP_ATOMIC
);
725 f
->flags
= ndm_flags
;
726 f
->updated
= f
->used
= jiffies
;
727 INIT_LIST_HEAD(&f
->remotes
);
728 memcpy(f
->eth_addr
, mac
, ETH_ALEN
);
730 vxlan_fdb_append(f
, ip
, port
, vni
, ifindex
, &rd
);
733 hlist_add_head_rcu(&f
->hlist
,
734 vxlan_fdb_head(vxlan
, mac
));
739 rd
= first_remote_rtnl(f
);
740 vxlan_fdb_notify(vxlan
, f
, rd
, RTM_NEWNEIGH
);
746 static void vxlan_fdb_free(struct rcu_head
*head
)
748 struct vxlan_fdb
*f
= container_of(head
, struct vxlan_fdb
, rcu
);
749 struct vxlan_rdst
*rd
, *nd
;
751 list_for_each_entry_safe(rd
, nd
, &f
->remotes
, list
) {
752 dst_cache_destroy(&rd
->dst_cache
);
758 static void vxlan_fdb_destroy(struct vxlan_dev
*vxlan
, struct vxlan_fdb
*f
)
760 netdev_dbg(vxlan
->dev
,
761 "delete %pM\n", f
->eth_addr
);
764 vxlan_fdb_notify(vxlan
, f
, first_remote_rtnl(f
), RTM_DELNEIGH
);
766 hlist_del_rcu(&f
->hlist
);
767 call_rcu(&f
->rcu
, vxlan_fdb_free
);
770 static int vxlan_fdb_parse(struct nlattr
*tb
[], struct vxlan_dev
*vxlan
,
771 union vxlan_addr
*ip
, __be16
*port
, __be32
*vni
,
774 struct net
*net
= dev_net(vxlan
->dev
);
778 err
= vxlan_nla_get_addr(ip
, tb
[NDA_DST
]);
782 union vxlan_addr
*remote
= &vxlan
->default_dst
.remote_ip
;
783 if (remote
->sa
.sa_family
== AF_INET
) {
784 ip
->sin
.sin_addr
.s_addr
= htonl(INADDR_ANY
);
785 ip
->sa
.sa_family
= AF_INET
;
786 #if IS_ENABLED(CONFIG_IPV6)
788 ip
->sin6
.sin6_addr
= in6addr_any
;
789 ip
->sa
.sa_family
= AF_INET6
;
795 if (nla_len(tb
[NDA_PORT
]) != sizeof(__be16
))
797 *port
= nla_get_be16(tb
[NDA_PORT
]);
799 *port
= vxlan
->cfg
.dst_port
;
803 if (nla_len(tb
[NDA_VNI
]) != sizeof(u32
))
805 *vni
= cpu_to_be32(nla_get_u32(tb
[NDA_VNI
]));
807 *vni
= vxlan
->default_dst
.remote_vni
;
810 if (tb
[NDA_IFINDEX
]) {
811 struct net_device
*tdev
;
813 if (nla_len(tb
[NDA_IFINDEX
]) != sizeof(u32
))
815 *ifindex
= nla_get_u32(tb
[NDA_IFINDEX
]);
816 tdev
= __dev_get_by_index(net
, *ifindex
);
818 return -EADDRNOTAVAIL
;
826 /* Add static entry (via netlink) */
827 static int vxlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
828 struct net_device
*dev
,
829 const unsigned char *addr
, u16 vid
, u16 flags
)
831 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
832 /* struct net *net = dev_net(vxlan->dev); */
839 if (!(ndm
->ndm_state
& (NUD_PERMANENT
|NUD_REACHABLE
))) {
840 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
845 if (tb
[NDA_DST
] == NULL
)
848 err
= vxlan_fdb_parse(tb
, vxlan
, &ip
, &port
, &vni
, &ifindex
);
852 if (vxlan
->default_dst
.remote_ip
.sa
.sa_family
!= ip
.sa
.sa_family
)
853 return -EAFNOSUPPORT
;
855 spin_lock_bh(&vxlan
->hash_lock
);
856 err
= vxlan_fdb_create(vxlan
, addr
, &ip
, ndm
->ndm_state
, flags
,
857 port
, vni
, ifindex
, ndm
->ndm_flags
);
858 spin_unlock_bh(&vxlan
->hash_lock
);
863 /* Delete entry (via netlink) */
864 static int vxlan_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
865 struct net_device
*dev
,
866 const unsigned char *addr
, u16 vid
)
868 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
870 struct vxlan_rdst
*rd
= NULL
;
877 err
= vxlan_fdb_parse(tb
, vxlan
, &ip
, &port
, &vni
, &ifindex
);
883 spin_lock_bh(&vxlan
->hash_lock
);
884 f
= vxlan_find_mac(vxlan
, addr
);
888 if (!vxlan_addr_any(&ip
)) {
889 rd
= vxlan_fdb_find_rdst(f
, &ip
, port
, vni
, ifindex
);
896 /* remove a destination if it's not the only one on the list,
897 * otherwise destroy the fdb entry
899 if (rd
&& !list_is_singular(&f
->remotes
)) {
900 list_del_rcu(&rd
->list
);
901 vxlan_fdb_notify(vxlan
, f
, rd
, RTM_DELNEIGH
);
906 vxlan_fdb_destroy(vxlan
, f
);
909 spin_unlock_bh(&vxlan
->hash_lock
);
914 /* Dump forwarding table */
915 static int vxlan_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
916 struct net_device
*dev
,
917 struct net_device
*filter_dev
, int idx
)
919 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
922 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
926 hlist_for_each_entry_rcu(f
, &vxlan
->fdb_head
[h
], hlist
) {
927 struct vxlan_rdst
*rd
;
929 list_for_each_entry_rcu(rd
, &f
->remotes
, list
) {
930 if (idx
< cb
->args
[0])
933 err
= vxlan_fdb_info(skb
, vxlan
, f
,
934 NETLINK_CB(cb
->skb
).portid
,
951 /* Watch incoming packets to learn mapping between Ethernet address
952 * and Tunnel endpoint.
953 * Return true if packet is bogus and should be dropped.
955 static bool vxlan_snoop(struct net_device
*dev
,
956 union vxlan_addr
*src_ip
, const u8
*src_mac
)
958 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
961 f
= vxlan_find_mac(vxlan
, src_mac
);
963 struct vxlan_rdst
*rdst
= first_remote_rcu(f
);
965 if (likely(vxlan_addr_equal(&rdst
->remote_ip
, src_ip
)))
968 /* Don't migrate static entries, drop packets */
969 if (f
->state
& NUD_NOARP
)
974 "%pM migrated from %pIS to %pIS\n",
975 src_mac
, &rdst
->remote_ip
.sa
, &src_ip
->sa
);
977 rdst
->remote_ip
= *src_ip
;
978 f
->updated
= jiffies
;
979 vxlan_fdb_notify(vxlan
, f
, rdst
, RTM_NEWNEIGH
);
981 /* learned new entry */
982 spin_lock(&vxlan
->hash_lock
);
984 /* close off race between vxlan_flush and incoming packets */
985 if (netif_running(dev
))
986 vxlan_fdb_create(vxlan
, src_mac
, src_ip
,
988 NLM_F_EXCL
|NLM_F_CREATE
,
990 vxlan
->default_dst
.remote_vni
,
992 spin_unlock(&vxlan
->hash_lock
);
998 /* See if multicast group is already in use by other ID */
999 static bool vxlan_group_used(struct vxlan_net
*vn
, struct vxlan_dev
*dev
)
1001 struct vxlan_dev
*vxlan
;
1002 unsigned short family
= dev
->default_dst
.remote_ip
.sa
.sa_family
;
1004 /* The vxlan_sock is only used by dev, leaving group has
1005 * no effect on other vxlan devices.
1007 if (family
== AF_INET
&& dev
->vn4_sock
&&
1008 atomic_read(&dev
->vn4_sock
->refcnt
) == 1)
1010 #if IS_ENABLED(CONFIG_IPV6)
1011 if (family
== AF_INET6
&& dev
->vn6_sock
&&
1012 atomic_read(&dev
->vn6_sock
->refcnt
) == 1)
1016 list_for_each_entry(vxlan
, &vn
->vxlan_list
, next
) {
1017 if (!netif_running(vxlan
->dev
) || vxlan
== dev
)
1020 if (family
== AF_INET
&& vxlan
->vn4_sock
!= dev
->vn4_sock
)
1022 #if IS_ENABLED(CONFIG_IPV6)
1023 if (family
== AF_INET6
&& vxlan
->vn6_sock
!= dev
->vn6_sock
)
1027 if (!vxlan_addr_equal(&vxlan
->default_dst
.remote_ip
,
1028 &dev
->default_dst
.remote_ip
))
1031 if (vxlan
->default_dst
.remote_ifindex
!=
1032 dev
->default_dst
.remote_ifindex
)
1041 static void __vxlan_sock_release(struct vxlan_sock
*vs
)
1043 struct vxlan_net
*vn
;
1047 if (!atomic_dec_and_test(&vs
->refcnt
))
1050 vn
= net_generic(sock_net(vs
->sock
->sk
), vxlan_net_id
);
1051 spin_lock(&vn
->sock_lock
);
1052 hlist_del_rcu(&vs
->hlist
);
1053 vxlan_notify_del_rx_port(vs
);
1054 spin_unlock(&vn
->sock_lock
);
1056 queue_work(vxlan_wq
, &vs
->del_work
);
1059 static void vxlan_sock_release(struct vxlan_dev
*vxlan
)
1061 __vxlan_sock_release(vxlan
->vn4_sock
);
1062 #if IS_ENABLED(CONFIG_IPV6)
1063 __vxlan_sock_release(vxlan
->vn6_sock
);
1067 /* Update multicast group membership when first VNI on
1068 * multicast address is brought up
1070 static int vxlan_igmp_join(struct vxlan_dev
*vxlan
)
1073 union vxlan_addr
*ip
= &vxlan
->default_dst
.remote_ip
;
1074 int ifindex
= vxlan
->default_dst
.remote_ifindex
;
1077 if (ip
->sa
.sa_family
== AF_INET
) {
1078 struct ip_mreqn mreq
= {
1079 .imr_multiaddr
.s_addr
= ip
->sin
.sin_addr
.s_addr
,
1080 .imr_ifindex
= ifindex
,
1083 sk
= vxlan
->vn4_sock
->sock
->sk
;
1085 ret
= ip_mc_join_group(sk
, &mreq
);
1087 #if IS_ENABLED(CONFIG_IPV6)
1089 sk
= vxlan
->vn6_sock
->sock
->sk
;
1091 ret
= ipv6_stub
->ipv6_sock_mc_join(sk
, ifindex
,
1092 &ip
->sin6
.sin6_addr
);
1100 /* Inverse of vxlan_igmp_join when last VNI is brought down */
1101 static int vxlan_igmp_leave(struct vxlan_dev
*vxlan
)
1104 union vxlan_addr
*ip
= &vxlan
->default_dst
.remote_ip
;
1105 int ifindex
= vxlan
->default_dst
.remote_ifindex
;
1108 if (ip
->sa
.sa_family
== AF_INET
) {
1109 struct ip_mreqn mreq
= {
1110 .imr_multiaddr
.s_addr
= ip
->sin
.sin_addr
.s_addr
,
1111 .imr_ifindex
= ifindex
,
1114 sk
= vxlan
->vn4_sock
->sock
->sk
;
1116 ret
= ip_mc_leave_group(sk
, &mreq
);
1118 #if IS_ENABLED(CONFIG_IPV6)
1120 sk
= vxlan
->vn6_sock
->sock
->sk
;
1122 ret
= ipv6_stub
->ipv6_sock_mc_drop(sk
, ifindex
,
1123 &ip
->sin6
.sin6_addr
);
1131 static bool vxlan_remcsum(struct vxlanhdr
*unparsed
,
1132 struct sk_buff
*skb
, u32 vxflags
)
1134 size_t start
, offset
;
1136 if (!(unparsed
->vx_flags
& VXLAN_HF_RCO
) || skb
->remcsum_offload
)
1139 start
= vxlan_rco_start(unparsed
->vx_vni
);
1140 offset
= start
+ vxlan_rco_offset(unparsed
->vx_vni
);
1142 if (!pskb_may_pull(skb
, offset
+ sizeof(u16
)))
1145 skb_remcsum_process(skb
, (void *)(vxlan_hdr(skb
) + 1), start
, offset
,
1146 !!(vxflags
& VXLAN_F_REMCSUM_NOPARTIAL
));
1148 unparsed
->vx_flags
&= ~VXLAN_HF_RCO
;
1149 unparsed
->vx_vni
&= VXLAN_VNI_MASK
;
1153 static void vxlan_parse_gbp_hdr(struct vxlanhdr
*unparsed
,
1154 struct sk_buff
*skb
, u32 vxflags
,
1155 struct vxlan_metadata
*md
)
1157 struct vxlanhdr_gbp
*gbp
= (struct vxlanhdr_gbp
*)unparsed
;
1158 struct metadata_dst
*tun_dst
;
1160 if (!(unparsed
->vx_flags
& VXLAN_HF_GBP
))
1163 md
->gbp
= ntohs(gbp
->policy_id
);
1165 tun_dst
= (struct metadata_dst
*)skb_dst(skb
);
1167 tun_dst
->u
.tun_info
.key
.tun_flags
|= TUNNEL_VXLAN_OPT
;
1168 tun_dst
->u
.tun_info
.options_len
= sizeof(*md
);
1170 if (gbp
->dont_learn
)
1171 md
->gbp
|= VXLAN_GBP_DONT_LEARN
;
1173 if (gbp
->policy_applied
)
1174 md
->gbp
|= VXLAN_GBP_POLICY_APPLIED
;
1176 /* In flow-based mode, GBP is carried in dst_metadata */
1177 if (!(vxflags
& VXLAN_F_COLLECT_METADATA
))
1178 skb
->mark
= md
->gbp
;
1180 unparsed
->vx_flags
&= ~VXLAN_GBP_USED_BITS
;
1183 static bool vxlan_parse_gpe_hdr(struct vxlanhdr
*unparsed
,
1185 struct sk_buff
*skb
, u32 vxflags
)
1187 struct vxlanhdr_gpe
*gpe
= (struct vxlanhdr_gpe
*)unparsed
;
1189 /* Need to have Next Protocol set for interfaces in GPE mode. */
1190 if (!gpe
->np_applied
)
1192 /* "The initial version is 0. If a receiver does not support the
1193 * version indicated it MUST drop the packet.
1195 if (gpe
->version
!= 0)
1197 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1198 * processing MUST occur." However, we don't implement OAM
1199 * processing, thus drop the packet.
1204 switch (gpe
->next_protocol
) {
1205 case VXLAN_GPE_NP_IPV4
:
1206 *protocol
= htons(ETH_P_IP
);
1208 case VXLAN_GPE_NP_IPV6
:
1209 *protocol
= htons(ETH_P_IPV6
);
1211 case VXLAN_GPE_NP_ETHERNET
:
1212 *protocol
= htons(ETH_P_TEB
);
1218 unparsed
->vx_flags
&= ~VXLAN_GPE_USED_BITS
;
1222 static bool vxlan_set_mac(struct vxlan_dev
*vxlan
,
1223 struct vxlan_sock
*vs
,
1224 struct sk_buff
*skb
)
1226 union vxlan_addr saddr
;
1228 skb_reset_mac_header(skb
);
1229 skb
->protocol
= eth_type_trans(skb
, vxlan
->dev
);
1230 skb_postpull_rcsum(skb
, eth_hdr(skb
), ETH_HLEN
);
1232 /* Ignore packet loops (and multicast echo) */
1233 if (ether_addr_equal(eth_hdr(skb
)->h_source
, vxlan
->dev
->dev_addr
))
1236 /* Get address from the outer IP header */
1237 if (vxlan_get_sk_family(vs
) == AF_INET
) {
1238 saddr
.sin
.sin_addr
.s_addr
= ip_hdr(skb
)->saddr
;
1239 saddr
.sa
.sa_family
= AF_INET
;
1240 #if IS_ENABLED(CONFIG_IPV6)
1242 saddr
.sin6
.sin6_addr
= ipv6_hdr(skb
)->saddr
;
1243 saddr
.sa
.sa_family
= AF_INET6
;
1247 if ((vxlan
->flags
& VXLAN_F_LEARN
) &&
1248 vxlan_snoop(skb
->dev
, &saddr
, eth_hdr(skb
)->h_source
))
1254 static bool vxlan_ecn_decapsulate(struct vxlan_sock
*vs
, void *oiph
,
1255 struct sk_buff
*skb
)
1259 if (vxlan_get_sk_family(vs
) == AF_INET
)
1260 err
= IP_ECN_decapsulate(oiph
, skb
);
1261 #if IS_ENABLED(CONFIG_IPV6)
1263 err
= IP6_ECN_decapsulate(oiph
, skb
);
1266 if (unlikely(err
) && log_ecn_error
) {
1267 if (vxlan_get_sk_family(vs
) == AF_INET
)
1268 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1269 &((struct iphdr
*)oiph
)->saddr
,
1270 ((struct iphdr
*)oiph
)->tos
);
1272 net_info_ratelimited("non-ECT from %pI6\n",
1273 &((struct ipv6hdr
*)oiph
)->saddr
);
1278 /* Callback from net/ipv4/udp.c to receive packets */
1279 static int vxlan_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1281 struct pcpu_sw_netstats
*stats
;
1282 struct vxlan_dev
*vxlan
;
1283 struct vxlan_sock
*vs
;
1284 struct vxlanhdr unparsed
;
1285 struct vxlan_metadata _md
;
1286 struct vxlan_metadata
*md
= &_md
;
1287 __be16 protocol
= htons(ETH_P_TEB
);
1288 bool raw_proto
= false;
1291 /* Need UDP and VXLAN header to be present */
1292 if (!pskb_may_pull(skb
, VXLAN_HLEN
))
1295 unparsed
= *vxlan_hdr(skb
);
1296 /* VNI flag always required to be set */
1297 if (!(unparsed
.vx_flags
& VXLAN_HF_VNI
)) {
1298 netdev_dbg(skb
->dev
, "invalid vxlan flags=%#x vni=%#x\n",
1299 ntohl(vxlan_hdr(skb
)->vx_flags
),
1300 ntohl(vxlan_hdr(skb
)->vx_vni
));
1301 /* Return non vxlan pkt */
1304 unparsed
.vx_flags
&= ~VXLAN_HF_VNI
;
1305 unparsed
.vx_vni
&= ~VXLAN_VNI_MASK
;
1307 vs
= rcu_dereference_sk_user_data(sk
);
1311 vxlan
= vxlan_vs_find_vni(vs
, vxlan_vni(vxlan_hdr(skb
)->vx_vni
));
1315 /* For backwards compatibility, only allow reserved fields to be
1316 * used by VXLAN extensions if explicitly requested.
1318 if (vs
->flags
& VXLAN_F_GPE
) {
1319 if (!vxlan_parse_gpe_hdr(&unparsed
, &protocol
, skb
, vs
->flags
))
1324 if (__iptunnel_pull_header(skb
, VXLAN_HLEN
, protocol
, raw_proto
,
1325 !net_eq(vxlan
->net
, dev_net(vxlan
->dev
))))
1328 if (vxlan_collect_metadata(vs
)) {
1329 __be32 vni
= vxlan_vni(vxlan_hdr(skb
)->vx_vni
);
1330 struct metadata_dst
*tun_dst
;
1332 tun_dst
= udp_tun_rx_dst(skb
, vxlan_get_sk_family(vs
), TUNNEL_KEY
,
1333 vxlan_vni_to_tun_id(vni
), sizeof(*md
));
1338 md
= ip_tunnel_info_opts(&tun_dst
->u
.tun_info
);
1340 skb_dst_set(skb
, (struct dst_entry
*)tun_dst
);
1342 memset(md
, 0, sizeof(*md
));
1345 if (vs
->flags
& VXLAN_F_REMCSUM_RX
)
1346 if (!vxlan_remcsum(&unparsed
, skb
, vs
->flags
))
1348 if (vs
->flags
& VXLAN_F_GBP
)
1349 vxlan_parse_gbp_hdr(&unparsed
, skb
, vs
->flags
, md
);
1350 /* Note that GBP and GPE can never be active together. This is
1351 * ensured in vxlan_dev_configure.
1354 if (unparsed
.vx_flags
|| unparsed
.vx_vni
) {
1355 /* If there are any unprocessed flags remaining treat
1356 * this as a malformed packet. This behavior diverges from
1357 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1358 * in reserved fields are to be ignored. The approach here
1359 * maintains compatibility with previous stack code, and also
1360 * is more robust and provides a little more security in
1361 * adding extensions to VXLAN.
1367 if (!vxlan_set_mac(vxlan
, vs
, skb
))
1370 skb
->dev
= vxlan
->dev
;
1371 skb
->pkt_type
= PACKET_HOST
;
1374 oiph
= skb_network_header(skb
);
1375 skb_reset_network_header(skb
);
1377 if (!vxlan_ecn_decapsulate(vs
, oiph
, skb
)) {
1378 ++vxlan
->dev
->stats
.rx_frame_errors
;
1379 ++vxlan
->dev
->stats
.rx_errors
;
1383 stats
= this_cpu_ptr(vxlan
->dev
->tstats
);
1384 u64_stats_update_begin(&stats
->syncp
);
1385 stats
->rx_packets
++;
1386 stats
->rx_bytes
+= skb
->len
;
1387 u64_stats_update_end(&stats
->syncp
);
1389 gro_cells_receive(&vxlan
->gro_cells
, skb
);
1393 /* Consume bad packet */
1398 static int arp_reduce(struct net_device
*dev
, struct sk_buff
*skb
)
1400 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1401 struct arphdr
*parp
;
1404 struct neighbour
*n
;
1406 if (dev
->flags
& IFF_NOARP
)
1409 if (!pskb_may_pull(skb
, arp_hdr_len(dev
))) {
1410 dev
->stats
.tx_dropped
++;
1413 parp
= arp_hdr(skb
);
1415 if ((parp
->ar_hrd
!= htons(ARPHRD_ETHER
) &&
1416 parp
->ar_hrd
!= htons(ARPHRD_IEEE802
)) ||
1417 parp
->ar_pro
!= htons(ETH_P_IP
) ||
1418 parp
->ar_op
!= htons(ARPOP_REQUEST
) ||
1419 parp
->ar_hln
!= dev
->addr_len
||
1422 arpptr
= (u8
*)parp
+ sizeof(struct arphdr
);
1424 arpptr
+= dev
->addr_len
; /* sha */
1425 memcpy(&sip
, arpptr
, sizeof(sip
));
1426 arpptr
+= sizeof(sip
);
1427 arpptr
+= dev
->addr_len
; /* tha */
1428 memcpy(&tip
, arpptr
, sizeof(tip
));
1430 if (ipv4_is_loopback(tip
) ||
1431 ipv4_is_multicast(tip
))
1434 n
= neigh_lookup(&arp_tbl
, &tip
, dev
);
1437 struct vxlan_fdb
*f
;
1438 struct sk_buff
*reply
;
1440 if (!(n
->nud_state
& NUD_CONNECTED
)) {
1445 f
= vxlan_find_mac(vxlan
, n
->ha
);
1446 if (f
&& vxlan_addr_any(&(first_remote_rcu(f
)->remote_ip
))) {
1447 /* bridge-local neighbor */
1452 reply
= arp_create(ARPOP_REPLY
, ETH_P_ARP
, sip
, dev
, tip
, sha
,
1460 skb_reset_mac_header(reply
);
1461 __skb_pull(reply
, skb_network_offset(reply
));
1462 reply
->ip_summed
= CHECKSUM_UNNECESSARY
;
1463 reply
->pkt_type
= PACKET_HOST
;
1465 if (netif_rx_ni(reply
) == NET_RX_DROP
)
1466 dev
->stats
.rx_dropped
++;
1467 } else if (vxlan
->flags
& VXLAN_F_L3MISS
) {
1468 union vxlan_addr ipa
= {
1469 .sin
.sin_addr
.s_addr
= tip
,
1470 .sin
.sin_family
= AF_INET
,
1473 vxlan_ip_miss(dev
, &ipa
);
1477 return NETDEV_TX_OK
;
1480 #if IS_ENABLED(CONFIG_IPV6)
1481 static struct sk_buff
*vxlan_na_create(struct sk_buff
*request
,
1482 struct neighbour
*n
, bool isrouter
)
1484 struct net_device
*dev
= request
->dev
;
1485 struct sk_buff
*reply
;
1486 struct nd_msg
*ns
, *na
;
1487 struct ipv6hdr
*pip6
;
1489 int na_olen
= 8; /* opt hdr + ETH_ALEN for target */
1496 len
= LL_RESERVED_SPACE(dev
) + sizeof(struct ipv6hdr
) +
1497 sizeof(*na
) + na_olen
+ dev
->needed_tailroom
;
1498 reply
= alloc_skb(len
, GFP_ATOMIC
);
1502 reply
->protocol
= htons(ETH_P_IPV6
);
1504 skb_reserve(reply
, LL_RESERVED_SPACE(request
->dev
));
1505 skb_push(reply
, sizeof(struct ethhdr
));
1506 skb_reset_mac_header(reply
);
1508 ns
= (struct nd_msg
*)skb_transport_header(request
);
1510 daddr
= eth_hdr(request
)->h_source
;
1511 ns_olen
= request
->len
- skb_transport_offset(request
) - sizeof(*ns
);
1512 for (i
= 0; i
< ns_olen
-1; i
+= (ns
->opt
[i
+1]<<3)) {
1513 if (ns
->opt
[i
] == ND_OPT_SOURCE_LL_ADDR
) {
1514 daddr
= ns
->opt
+ i
+ sizeof(struct nd_opt_hdr
);
1519 /* Ethernet header */
1520 ether_addr_copy(eth_hdr(reply
)->h_dest
, daddr
);
1521 ether_addr_copy(eth_hdr(reply
)->h_source
, n
->ha
);
1522 eth_hdr(reply
)->h_proto
= htons(ETH_P_IPV6
);
1523 reply
->protocol
= htons(ETH_P_IPV6
);
1525 skb_pull(reply
, sizeof(struct ethhdr
));
1526 skb_reset_network_header(reply
);
1527 skb_put(reply
, sizeof(struct ipv6hdr
));
1531 pip6
= ipv6_hdr(reply
);
1532 memset(pip6
, 0, sizeof(struct ipv6hdr
));
1534 pip6
->priority
= ipv6_hdr(request
)->priority
;
1535 pip6
->nexthdr
= IPPROTO_ICMPV6
;
1536 pip6
->hop_limit
= 255;
1537 pip6
->daddr
= ipv6_hdr(request
)->saddr
;
1538 pip6
->saddr
= *(struct in6_addr
*)n
->primary_key
;
1540 skb_pull(reply
, sizeof(struct ipv6hdr
));
1541 skb_reset_transport_header(reply
);
1543 na
= (struct nd_msg
*)skb_put(reply
, sizeof(*na
) + na_olen
);
1545 /* Neighbor Advertisement */
1546 memset(na
, 0, sizeof(*na
)+na_olen
);
1547 na
->icmph
.icmp6_type
= NDISC_NEIGHBOUR_ADVERTISEMENT
;
1548 na
->icmph
.icmp6_router
= isrouter
;
1549 na
->icmph
.icmp6_override
= 1;
1550 na
->icmph
.icmp6_solicited
= 1;
1551 na
->target
= ns
->target
;
1552 ether_addr_copy(&na
->opt
[2], n
->ha
);
1553 na
->opt
[0] = ND_OPT_TARGET_LL_ADDR
;
1554 na
->opt
[1] = na_olen
>> 3;
1556 na
->icmph
.icmp6_cksum
= csum_ipv6_magic(&pip6
->saddr
,
1557 &pip6
->daddr
, sizeof(*na
)+na_olen
, IPPROTO_ICMPV6
,
1558 csum_partial(na
, sizeof(*na
)+na_olen
, 0));
1560 pip6
->payload_len
= htons(sizeof(*na
)+na_olen
);
1562 skb_push(reply
, sizeof(struct ipv6hdr
));
1564 reply
->ip_summed
= CHECKSUM_UNNECESSARY
;
1569 static int neigh_reduce(struct net_device
*dev
, struct sk_buff
*skb
)
1571 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1573 const struct ipv6hdr
*iphdr
;
1574 const struct in6_addr
*saddr
, *daddr
;
1575 struct neighbour
*n
;
1576 struct inet6_dev
*in6_dev
;
1578 in6_dev
= __in6_dev_get(dev
);
1582 iphdr
= ipv6_hdr(skb
);
1583 saddr
= &iphdr
->saddr
;
1584 daddr
= &iphdr
->daddr
;
1586 msg
= (struct nd_msg
*)skb_transport_header(skb
);
1587 if (msg
->icmph
.icmp6_code
!= 0 ||
1588 msg
->icmph
.icmp6_type
!= NDISC_NEIGHBOUR_SOLICITATION
)
1591 if (ipv6_addr_loopback(daddr
) ||
1592 ipv6_addr_is_multicast(&msg
->target
))
1595 n
= neigh_lookup(ipv6_stub
->nd_tbl
, &msg
->target
, dev
);
1598 struct vxlan_fdb
*f
;
1599 struct sk_buff
*reply
;
1601 if (!(n
->nud_state
& NUD_CONNECTED
)) {
1606 f
= vxlan_find_mac(vxlan
, n
->ha
);
1607 if (f
&& vxlan_addr_any(&(first_remote_rcu(f
)->remote_ip
))) {
1608 /* bridge-local neighbor */
1613 reply
= vxlan_na_create(skb
, n
,
1614 !!(f
? f
->flags
& NTF_ROUTER
: 0));
1621 if (netif_rx_ni(reply
) == NET_RX_DROP
)
1622 dev
->stats
.rx_dropped
++;
1624 } else if (vxlan
->flags
& VXLAN_F_L3MISS
) {
1625 union vxlan_addr ipa
= {
1626 .sin6
.sin6_addr
= msg
->target
,
1627 .sin6
.sin6_family
= AF_INET6
,
1630 vxlan_ip_miss(dev
, &ipa
);
1635 return NETDEV_TX_OK
;
1639 static bool route_shortcircuit(struct net_device
*dev
, struct sk_buff
*skb
)
1641 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1642 struct neighbour
*n
;
1644 if (is_multicast_ether_addr(eth_hdr(skb
)->h_dest
))
1648 switch (ntohs(eth_hdr(skb
)->h_proto
)) {
1653 if (!pskb_may_pull(skb
, sizeof(struct iphdr
)))
1656 n
= neigh_lookup(&arp_tbl
, &pip
->daddr
, dev
);
1657 if (!n
&& (vxlan
->flags
& VXLAN_F_L3MISS
)) {
1658 union vxlan_addr ipa
= {
1659 .sin
.sin_addr
.s_addr
= pip
->daddr
,
1660 .sin
.sin_family
= AF_INET
,
1663 vxlan_ip_miss(dev
, &ipa
);
1669 #if IS_ENABLED(CONFIG_IPV6)
1672 struct ipv6hdr
*pip6
;
1674 if (!pskb_may_pull(skb
, sizeof(struct ipv6hdr
)))
1676 pip6
= ipv6_hdr(skb
);
1677 n
= neigh_lookup(ipv6_stub
->nd_tbl
, &pip6
->daddr
, dev
);
1678 if (!n
&& (vxlan
->flags
& VXLAN_F_L3MISS
)) {
1679 union vxlan_addr ipa
= {
1680 .sin6
.sin6_addr
= pip6
->daddr
,
1681 .sin6
.sin6_family
= AF_INET6
,
1684 vxlan_ip_miss(dev
, &ipa
);
1698 diff
= !ether_addr_equal(eth_hdr(skb
)->h_dest
, n
->ha
);
1700 memcpy(eth_hdr(skb
)->h_source
, eth_hdr(skb
)->h_dest
,
1702 memcpy(eth_hdr(skb
)->h_dest
, n
->ha
, dev
->addr_len
);
1711 static void vxlan_build_gbp_hdr(struct vxlanhdr
*vxh
, u32 vxflags
,
1712 struct vxlan_metadata
*md
)
1714 struct vxlanhdr_gbp
*gbp
;
1719 gbp
= (struct vxlanhdr_gbp
*)vxh
;
1720 vxh
->vx_flags
|= VXLAN_HF_GBP
;
1722 if (md
->gbp
& VXLAN_GBP_DONT_LEARN
)
1723 gbp
->dont_learn
= 1;
1725 if (md
->gbp
& VXLAN_GBP_POLICY_APPLIED
)
1726 gbp
->policy_applied
= 1;
1728 gbp
->policy_id
= htons(md
->gbp
& VXLAN_GBP_ID_MASK
);
1731 static int vxlan_build_gpe_hdr(struct vxlanhdr
*vxh
, u32 vxflags
,
1734 struct vxlanhdr_gpe
*gpe
= (struct vxlanhdr_gpe
*)vxh
;
1736 gpe
->np_applied
= 1;
1739 case htons(ETH_P_IP
):
1740 gpe
->next_protocol
= VXLAN_GPE_NP_IPV4
;
1742 case htons(ETH_P_IPV6
):
1743 gpe
->next_protocol
= VXLAN_GPE_NP_IPV6
;
1745 case htons(ETH_P_TEB
):
1746 gpe
->next_protocol
= VXLAN_GPE_NP_ETHERNET
;
1749 return -EPFNOSUPPORT
;
1752 static int vxlan_build_skb(struct sk_buff
*skb
, struct dst_entry
*dst
,
1753 int iphdr_len
, __be32 vni
,
1754 struct vxlan_metadata
*md
, u32 vxflags
,
1757 struct vxlanhdr
*vxh
;
1760 int type
= udp_sum
? SKB_GSO_UDP_TUNNEL_CSUM
: SKB_GSO_UDP_TUNNEL
;
1761 __be16 inner_protocol
= htons(ETH_P_TEB
);
1763 if ((vxflags
& VXLAN_F_REMCSUM_TX
) &&
1764 skb
->ip_summed
== CHECKSUM_PARTIAL
) {
1765 int csum_start
= skb_checksum_start_offset(skb
);
1767 if (csum_start
<= VXLAN_MAX_REMCSUM_START
&&
1768 !(csum_start
& VXLAN_RCO_SHIFT_MASK
) &&
1769 (skb
->csum_offset
== offsetof(struct udphdr
, check
) ||
1770 skb
->csum_offset
== offsetof(struct tcphdr
, check
)))
1771 type
|= SKB_GSO_TUNNEL_REMCSUM
;
1774 min_headroom
= LL_RESERVED_SPACE(dst
->dev
) + dst
->header_len
1775 + VXLAN_HLEN
+ iphdr_len
1776 + (skb_vlan_tag_present(skb
) ? VLAN_HLEN
: 0);
1778 /* Need space for new headers (invalidates iph ptr) */
1779 err
= skb_cow_head(skb
, min_headroom
);
1783 skb
= vlan_hwaccel_push_inside(skb
);
1787 skb
= iptunnel_handle_offloads(skb
, type
);
1789 return PTR_ERR(skb
);
1791 vxh
= (struct vxlanhdr
*) __skb_push(skb
, sizeof(*vxh
));
1792 vxh
->vx_flags
= VXLAN_HF_VNI
;
1793 vxh
->vx_vni
= vxlan_vni_field(vni
);
1795 if (type
& SKB_GSO_TUNNEL_REMCSUM
) {
1798 start
= skb_checksum_start_offset(skb
) - sizeof(struct vxlanhdr
);
1799 vxh
->vx_vni
|= vxlan_compute_rco(start
, skb
->csum_offset
);
1800 vxh
->vx_flags
|= VXLAN_HF_RCO
;
1802 if (!skb_is_gso(skb
)) {
1803 skb
->ip_summed
= CHECKSUM_NONE
;
1804 skb
->encapsulation
= 0;
1808 if (vxflags
& VXLAN_F_GBP
)
1809 vxlan_build_gbp_hdr(vxh
, vxflags
, md
);
1810 if (vxflags
& VXLAN_F_GPE
) {
1811 err
= vxlan_build_gpe_hdr(vxh
, vxflags
, skb
->protocol
);
1814 inner_protocol
= skb
->protocol
;
1817 skb_set_inner_protocol(skb
, inner_protocol
);
1825 static struct rtable
*vxlan_get_route(struct vxlan_dev
*vxlan
,
1826 struct sk_buff
*skb
, int oif
, u8 tos
,
1827 __be32 daddr
, __be32
*saddr
,
1828 struct dst_cache
*dst_cache
,
1829 const struct ip_tunnel_info
*info
)
1831 bool use_cache
= ip_tunnel_dst_cache_usable(skb
, info
);
1832 struct rtable
*rt
= NULL
;
1838 rt
= dst_cache_get_ip4(dst_cache
, saddr
);
1843 memset(&fl4
, 0, sizeof(fl4
));
1844 fl4
.flowi4_oif
= oif
;
1845 fl4
.flowi4_tos
= RT_TOS(tos
);
1846 fl4
.flowi4_mark
= skb
->mark
;
1847 fl4
.flowi4_proto
= IPPROTO_UDP
;
1849 fl4
.saddr
= vxlan
->cfg
.saddr
.sin
.sin_addr
.s_addr
;
1851 rt
= ip_route_output_key(vxlan
->net
, &fl4
);
1855 dst_cache_set_ip4(dst_cache
, &rt
->dst
, fl4
.saddr
);
1860 #if IS_ENABLED(CONFIG_IPV6)
1861 static struct dst_entry
*vxlan6_get_route(struct vxlan_dev
*vxlan
,
1862 struct sk_buff
*skb
, int oif
, u8 tos
,
1864 const struct in6_addr
*daddr
,
1865 struct in6_addr
*saddr
,
1866 struct dst_cache
*dst_cache
,
1867 const struct ip_tunnel_info
*info
)
1869 bool use_cache
= ip_tunnel_dst_cache_usable(skb
, info
);
1870 struct dst_entry
*ndst
;
1877 ndst
= dst_cache_get_ip6(dst_cache
, saddr
);
1882 memset(&fl6
, 0, sizeof(fl6
));
1883 fl6
.flowi6_oif
= oif
;
1885 fl6
.saddr
= vxlan
->cfg
.saddr
.sin6
.sin6_addr
;
1886 fl6
.flowlabel
= ip6_make_flowinfo(RT_TOS(tos
), label
);
1887 fl6
.flowi6_mark
= skb
->mark
;
1888 fl6
.flowi6_proto
= IPPROTO_UDP
;
1890 err
= ipv6_stub
->ipv6_dst_lookup(vxlan
->net
,
1891 vxlan
->vn6_sock
->sock
->sk
,
1894 return ERR_PTR(err
);
1898 dst_cache_set_ip6(dst_cache
, ndst
, saddr
);
1903 /* Bypass encapsulation if the destination is local */
1904 static void vxlan_encap_bypass(struct sk_buff
*skb
, struct vxlan_dev
*src_vxlan
,
1905 struct vxlan_dev
*dst_vxlan
)
1907 struct pcpu_sw_netstats
*tx_stats
, *rx_stats
;
1908 union vxlan_addr loopback
;
1909 union vxlan_addr
*remote_ip
= &dst_vxlan
->default_dst
.remote_ip
;
1910 struct net_device
*dev
= skb
->dev
;
1913 tx_stats
= this_cpu_ptr(src_vxlan
->dev
->tstats
);
1914 rx_stats
= this_cpu_ptr(dst_vxlan
->dev
->tstats
);
1915 skb
->pkt_type
= PACKET_HOST
;
1916 skb
->encapsulation
= 0;
1917 skb
->dev
= dst_vxlan
->dev
;
1918 __skb_pull(skb
, skb_network_offset(skb
));
1920 if (remote_ip
->sa
.sa_family
== AF_INET
) {
1921 loopback
.sin
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
1922 loopback
.sa
.sa_family
= AF_INET
;
1923 #if IS_ENABLED(CONFIG_IPV6)
1925 loopback
.sin6
.sin6_addr
= in6addr_loopback
;
1926 loopback
.sa
.sa_family
= AF_INET6
;
1930 if (dst_vxlan
->flags
& VXLAN_F_LEARN
)
1931 vxlan_snoop(skb
->dev
, &loopback
, eth_hdr(skb
)->h_source
);
1933 u64_stats_update_begin(&tx_stats
->syncp
);
1934 tx_stats
->tx_packets
++;
1935 tx_stats
->tx_bytes
+= len
;
1936 u64_stats_update_end(&tx_stats
->syncp
);
1938 if (netif_rx(skb
) == NET_RX_SUCCESS
) {
1939 u64_stats_update_begin(&rx_stats
->syncp
);
1940 rx_stats
->rx_packets
++;
1941 rx_stats
->rx_bytes
+= len
;
1942 u64_stats_update_end(&rx_stats
->syncp
);
1944 dev
->stats
.rx_dropped
++;
1948 static void vxlan_xmit_one(struct sk_buff
*skb
, struct net_device
*dev
,
1949 struct vxlan_rdst
*rdst
, bool did_rsc
)
1951 struct dst_cache
*dst_cache
;
1952 struct ip_tunnel_info
*info
;
1953 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1955 struct rtable
*rt
= NULL
;
1956 const struct iphdr
*old_iph
;
1957 union vxlan_addr
*dst
;
1958 union vxlan_addr remote_ip
;
1959 struct vxlan_metadata _md
;
1960 struct vxlan_metadata
*md
= &_md
;
1961 __be16 src_port
= 0, dst_port
;
1966 u32 flags
= vxlan
->flags
;
1967 bool udp_sum
= false;
1968 bool xnet
= !net_eq(vxlan
->net
, dev_net(vxlan
->dev
));
1970 info
= skb_tunnel_info(skb
);
1973 dst_port
= rdst
->remote_port
? rdst
->remote_port
: vxlan
->cfg
.dst_port
;
1974 vni
= rdst
->remote_vni
;
1975 dst
= &rdst
->remote_ip
;
1976 dst_cache
= &rdst
->dst_cache
;
1979 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1983 dst_port
= info
->key
.tp_dst
? : vxlan
->cfg
.dst_port
;
1984 vni
= vxlan_tun_id_to_vni(info
->key
.tun_id
);
1985 remote_ip
.sa
.sa_family
= ip_tunnel_info_af(info
);
1986 if (remote_ip
.sa
.sa_family
== AF_INET
)
1987 remote_ip
.sin
.sin_addr
.s_addr
= info
->key
.u
.ipv4
.dst
;
1989 remote_ip
.sin6
.sin6_addr
= info
->key
.u
.ipv6
.dst
;
1991 dst_cache
= &info
->dst_cache
;
1994 if (vxlan_addr_any(dst
)) {
1996 /* short-circuited back to local bridge */
1997 vxlan_encap_bypass(skb
, vxlan
, vxlan
);
2003 old_iph
= ip_hdr(skb
);
2005 ttl
= vxlan
->cfg
.ttl
;
2006 if (!ttl
&& vxlan_addr_multicast(dst
))
2009 tos
= vxlan
->cfg
.tos
;
2011 tos
= ip_tunnel_get_dsfield(old_iph
, skb
);
2013 label
= vxlan
->cfg
.label
;
2014 src_port
= udp_flow_src_port(dev_net(dev
), skb
, vxlan
->cfg
.port_min
,
2015 vxlan
->cfg
.port_max
, true);
2018 ttl
= info
->key
.ttl
;
2019 tos
= info
->key
.tos
;
2020 label
= info
->key
.label
;
2021 udp_sum
= !!(info
->key
.tun_flags
& TUNNEL_CSUM
);
2023 if (info
->options_len
)
2024 md
= ip_tunnel_info_opts(info
);
2026 md
->gbp
= skb
->mark
;
2029 if (dst
->sa
.sa_family
== AF_INET
) {
2032 if (!vxlan
->vn4_sock
)
2034 sk
= vxlan
->vn4_sock
->sock
->sk
;
2036 rt
= vxlan_get_route(vxlan
, skb
,
2037 rdst
? rdst
->remote_ifindex
: 0, tos
,
2038 dst
->sin
.sin_addr
.s_addr
, &saddr
,
2041 netdev_dbg(dev
, "no route to %pI4\n",
2042 &dst
->sin
.sin_addr
.s_addr
);
2043 dev
->stats
.tx_carrier_errors
++;
2047 if (rt
->dst
.dev
== dev
) {
2048 netdev_dbg(dev
, "circular route to %pI4\n",
2049 &dst
->sin
.sin_addr
.s_addr
);
2050 dev
->stats
.collisions
++;
2054 /* Bypass encapsulation if the destination is local */
2055 if (rt
->rt_flags
& RTCF_LOCAL
&&
2056 !(rt
->rt_flags
& (RTCF_BROADCAST
| RTCF_MULTICAST
))) {
2057 struct vxlan_dev
*dst_vxlan
;
2060 dst_vxlan
= vxlan_find_vni(vxlan
->net
, vni
,
2061 dst
->sa
.sa_family
, dst_port
,
2065 vxlan_encap_bypass(skb
, vxlan
, dst_vxlan
);
2070 udp_sum
= !(flags
& VXLAN_F_UDP_ZERO_CSUM_TX
);
2071 else if (info
->key
.tun_flags
& TUNNEL_DONT_FRAGMENT
)
2074 tos
= ip_tunnel_ecn_encap(tos
, old_iph
, skb
);
2075 ttl
= ttl
? : ip4_dst_hoplimit(&rt
->dst
);
2076 err
= vxlan_build_skb(skb
, &rt
->dst
, sizeof(struct iphdr
),
2077 vni
, md
, flags
, udp_sum
);
2081 udp_tunnel_xmit_skb(rt
, sk
, skb
, saddr
,
2082 dst
->sin
.sin_addr
.s_addr
, tos
, ttl
, df
,
2083 src_port
, dst_port
, xnet
, !udp_sum
);
2084 #if IS_ENABLED(CONFIG_IPV6)
2086 struct dst_entry
*ndst
;
2087 struct in6_addr saddr
;
2090 if (!vxlan
->vn6_sock
)
2092 sk
= vxlan
->vn6_sock
->sock
->sk
;
2094 ndst
= vxlan6_get_route(vxlan
, skb
,
2095 rdst
? rdst
->remote_ifindex
: 0, tos
,
2096 label
, &dst
->sin6
.sin6_addr
, &saddr
,
2099 netdev_dbg(dev
, "no route to %pI6\n",
2100 &dst
->sin6
.sin6_addr
);
2101 dev
->stats
.tx_carrier_errors
++;
2105 if (ndst
->dev
== dev
) {
2106 netdev_dbg(dev
, "circular route to %pI6\n",
2107 &dst
->sin6
.sin6_addr
);
2109 dev
->stats
.collisions
++;
2113 /* Bypass encapsulation if the destination is local */
2114 rt6i_flags
= ((struct rt6_info
*)ndst
)->rt6i_flags
;
2115 if (rt6i_flags
& RTF_LOCAL
&&
2116 !(rt6i_flags
& (RTCF_BROADCAST
| RTCF_MULTICAST
))) {
2117 struct vxlan_dev
*dst_vxlan
;
2120 dst_vxlan
= vxlan_find_vni(vxlan
->net
, vni
,
2121 dst
->sa
.sa_family
, dst_port
,
2125 vxlan_encap_bypass(skb
, vxlan
, dst_vxlan
);
2130 udp_sum
= !(flags
& VXLAN_F_UDP_ZERO_CSUM6_TX
);
2132 tos
= ip_tunnel_ecn_encap(tos
, old_iph
, skb
);
2133 ttl
= ttl
? : ip6_dst_hoplimit(ndst
);
2134 skb_scrub_packet(skb
, xnet
);
2135 err
= vxlan_build_skb(skb
, ndst
, sizeof(struct ipv6hdr
),
2136 vni
, md
, flags
, udp_sum
);
2141 udp_tunnel6_xmit_skb(ndst
, sk
, skb
, dev
,
2142 &saddr
, &dst
->sin6
.sin6_addr
, tos
, ttl
,
2143 label
, src_port
, dst_port
, !udp_sum
);
2150 dev
->stats
.tx_dropped
++;
2154 /* skb is already freed. */
2159 dev
->stats
.tx_errors
++;
2164 /* Transmit local packets over Vxlan
2166 * Outer IP header inherits ECN and DF from inner header.
2167 * Outer UDP destination is the VXLAN assigned port.
2168 * source port is based on hash of flow
2170 static netdev_tx_t
vxlan_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
2172 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2173 const struct ip_tunnel_info
*info
;
2175 bool did_rsc
= false;
2176 struct vxlan_rdst
*rdst
, *fdst
= NULL
;
2177 struct vxlan_fdb
*f
;
2179 info
= skb_tunnel_info(skb
);
2181 skb_reset_mac_header(skb
);
2183 if (vxlan
->flags
& VXLAN_F_COLLECT_METADATA
) {
2184 if (info
&& info
->mode
& IP_TUNNEL_INFO_TX
)
2185 vxlan_xmit_one(skb
, dev
, NULL
, false);
2188 return NETDEV_TX_OK
;
2191 if (vxlan
->flags
& VXLAN_F_PROXY
) {
2193 if (ntohs(eth
->h_proto
) == ETH_P_ARP
)
2194 return arp_reduce(dev
, skb
);
2195 #if IS_ENABLED(CONFIG_IPV6)
2196 else if (ntohs(eth
->h_proto
) == ETH_P_IPV6
&&
2197 pskb_may_pull(skb
, sizeof(struct ipv6hdr
)
2198 + sizeof(struct nd_msg
)) &&
2199 ipv6_hdr(skb
)->nexthdr
== IPPROTO_ICMPV6
) {
2202 msg
= (struct nd_msg
*)skb_transport_header(skb
);
2203 if (msg
->icmph
.icmp6_code
== 0 &&
2204 msg
->icmph
.icmp6_type
== NDISC_NEIGHBOUR_SOLICITATION
)
2205 return neigh_reduce(dev
, skb
);
2211 f
= vxlan_find_mac(vxlan
, eth
->h_dest
);
2214 if (f
&& (f
->flags
& NTF_ROUTER
) && (vxlan
->flags
& VXLAN_F_RSC
) &&
2215 (ntohs(eth
->h_proto
) == ETH_P_IP
||
2216 ntohs(eth
->h_proto
) == ETH_P_IPV6
)) {
2217 did_rsc
= route_shortcircuit(dev
, skb
);
2219 f
= vxlan_find_mac(vxlan
, eth
->h_dest
);
2223 f
= vxlan_find_mac(vxlan
, all_zeros_mac
);
2225 if ((vxlan
->flags
& VXLAN_F_L2MISS
) &&
2226 !is_multicast_ether_addr(eth
->h_dest
))
2227 vxlan_fdb_miss(vxlan
, eth
->h_dest
);
2229 dev
->stats
.tx_dropped
++;
2231 return NETDEV_TX_OK
;
2235 list_for_each_entry_rcu(rdst
, &f
->remotes
, list
) {
2236 struct sk_buff
*skb1
;
2242 skb1
= skb_clone(skb
, GFP_ATOMIC
);
2244 vxlan_xmit_one(skb1
, dev
, rdst
, did_rsc
);
2248 vxlan_xmit_one(skb
, dev
, fdst
, did_rsc
);
2251 return NETDEV_TX_OK
;
2254 /* Walk the forwarding table and purge stale entries */
2255 static void vxlan_cleanup(unsigned long arg
)
2257 struct vxlan_dev
*vxlan
= (struct vxlan_dev
*) arg
;
2258 unsigned long next_timer
= jiffies
+ FDB_AGE_INTERVAL
;
2261 if (!netif_running(vxlan
->dev
))
2264 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
2265 struct hlist_node
*p
, *n
;
2267 spin_lock_bh(&vxlan
->hash_lock
);
2268 hlist_for_each_safe(p
, n
, &vxlan
->fdb_head
[h
]) {
2270 = container_of(p
, struct vxlan_fdb
, hlist
);
2271 unsigned long timeout
;
2273 if (f
->state
& NUD_PERMANENT
)
2276 timeout
= f
->used
+ vxlan
->cfg
.age_interval
* HZ
;
2277 if (time_before_eq(timeout
, jiffies
)) {
2278 netdev_dbg(vxlan
->dev
,
2279 "garbage collect %pM\n",
2281 f
->state
= NUD_STALE
;
2282 vxlan_fdb_destroy(vxlan
, f
);
2283 } else if (time_before(timeout
, next_timer
))
2284 next_timer
= timeout
;
2286 spin_unlock_bh(&vxlan
->hash_lock
);
2289 mod_timer(&vxlan
->age_timer
, next_timer
);
2292 static void vxlan_vs_add_dev(struct vxlan_sock
*vs
, struct vxlan_dev
*vxlan
)
2294 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2295 __be32 vni
= vxlan
->default_dst
.remote_vni
;
2297 spin_lock(&vn
->sock_lock
);
2298 hlist_add_head_rcu(&vxlan
->hlist
, vni_head(vs
, vni
));
2299 spin_unlock(&vn
->sock_lock
);
2302 /* Setup stats when device is created */
2303 static int vxlan_init(struct net_device
*dev
)
2305 dev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
2312 static void vxlan_fdb_delete_default(struct vxlan_dev
*vxlan
)
2314 struct vxlan_fdb
*f
;
2316 spin_lock_bh(&vxlan
->hash_lock
);
2317 f
= __vxlan_find_mac(vxlan
, all_zeros_mac
);
2319 vxlan_fdb_destroy(vxlan
, f
);
2320 spin_unlock_bh(&vxlan
->hash_lock
);
2323 static void vxlan_uninit(struct net_device
*dev
)
2325 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2327 vxlan_fdb_delete_default(vxlan
);
2329 free_percpu(dev
->tstats
);
2332 /* Start ageing timer and join group when device is brought up */
2333 static int vxlan_open(struct net_device
*dev
)
2335 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2338 ret
= vxlan_sock_add(vxlan
);
2342 if (vxlan_addr_multicast(&vxlan
->default_dst
.remote_ip
)) {
2343 ret
= vxlan_igmp_join(vxlan
);
2344 if (ret
== -EADDRINUSE
)
2347 vxlan_sock_release(vxlan
);
2352 if (vxlan
->cfg
.age_interval
)
2353 mod_timer(&vxlan
->age_timer
, jiffies
+ FDB_AGE_INTERVAL
);
2358 /* Purge the forwarding table */
2359 static void vxlan_flush(struct vxlan_dev
*vxlan
)
2363 spin_lock_bh(&vxlan
->hash_lock
);
2364 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
2365 struct hlist_node
*p
, *n
;
2366 hlist_for_each_safe(p
, n
, &vxlan
->fdb_head
[h
]) {
2368 = container_of(p
, struct vxlan_fdb
, hlist
);
2369 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2370 if (!is_zero_ether_addr(f
->eth_addr
))
2371 vxlan_fdb_destroy(vxlan
, f
);
2374 spin_unlock_bh(&vxlan
->hash_lock
);
2377 /* Cleanup timer and forwarding table on shutdown */
2378 static int vxlan_stop(struct net_device
*dev
)
2380 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2381 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2384 if (vxlan_addr_multicast(&vxlan
->default_dst
.remote_ip
) &&
2385 !vxlan_group_used(vn
, vxlan
))
2386 ret
= vxlan_igmp_leave(vxlan
);
2388 del_timer_sync(&vxlan
->age_timer
);
2391 vxlan_sock_release(vxlan
);
2396 /* Stub, nothing needs to be done. */
2397 static void vxlan_set_multicast_list(struct net_device
*dev
)
2401 static int __vxlan_change_mtu(struct net_device
*dev
,
2402 struct net_device
*lowerdev
,
2403 struct vxlan_rdst
*dst
, int new_mtu
, bool strict
)
2405 int max_mtu
= IP_MAX_MTU
;
2408 max_mtu
= lowerdev
->mtu
;
2410 if (dst
->remote_ip
.sa
.sa_family
== AF_INET6
)
2411 max_mtu
-= VXLAN6_HEADROOM
;
2413 max_mtu
-= VXLAN_HEADROOM
;
2418 if (new_mtu
> max_mtu
) {
2429 static int vxlan_change_mtu(struct net_device
*dev
, int new_mtu
)
2431 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2432 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
2433 struct net_device
*lowerdev
= __dev_get_by_index(vxlan
->net
,
2434 dst
->remote_ifindex
);
2435 return __vxlan_change_mtu(dev
, lowerdev
, dst
, new_mtu
, true);
2438 static int vxlan_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
)
2440 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2441 struct ip_tunnel_info
*info
= skb_tunnel_info(skb
);
2442 __be16 sport
, dport
;
2444 sport
= udp_flow_src_port(dev_net(dev
), skb
, vxlan
->cfg
.port_min
,
2445 vxlan
->cfg
.port_max
, true);
2446 dport
= info
->key
.tp_dst
? : vxlan
->cfg
.dst_port
;
2448 if (ip_tunnel_info_af(info
) == AF_INET
) {
2451 if (!vxlan
->vn4_sock
)
2453 rt
= vxlan_get_route(vxlan
, skb
, 0, info
->key
.tos
,
2454 info
->key
.u
.ipv4
.dst
,
2455 &info
->key
.u
.ipv4
.src
, NULL
, info
);
2460 #if IS_ENABLED(CONFIG_IPV6)
2461 struct dst_entry
*ndst
;
2463 if (!vxlan
->vn6_sock
)
2465 ndst
= vxlan6_get_route(vxlan
, skb
, 0, info
->key
.tos
,
2466 info
->key
.label
, &info
->key
.u
.ipv6
.dst
,
2467 &info
->key
.u
.ipv6
.src
, NULL
, info
);
2469 return PTR_ERR(ndst
);
2471 #else /* !CONFIG_IPV6 */
2472 return -EPFNOSUPPORT
;
2475 info
->key
.tp_src
= sport
;
2476 info
->key
.tp_dst
= dport
;
2480 static const struct net_device_ops vxlan_netdev_ether_ops
= {
2481 .ndo_init
= vxlan_init
,
2482 .ndo_uninit
= vxlan_uninit
,
2483 .ndo_open
= vxlan_open
,
2484 .ndo_stop
= vxlan_stop
,
2485 .ndo_start_xmit
= vxlan_xmit
,
2486 .ndo_get_stats64
= ip_tunnel_get_stats64
,
2487 .ndo_set_rx_mode
= vxlan_set_multicast_list
,
2488 .ndo_change_mtu
= vxlan_change_mtu
,
2489 .ndo_validate_addr
= eth_validate_addr
,
2490 .ndo_set_mac_address
= eth_mac_addr
,
2491 .ndo_fdb_add
= vxlan_fdb_add
,
2492 .ndo_fdb_del
= vxlan_fdb_delete
,
2493 .ndo_fdb_dump
= vxlan_fdb_dump
,
2494 .ndo_fill_metadata_dst
= vxlan_fill_metadata_dst
,
2497 static const struct net_device_ops vxlan_netdev_raw_ops
= {
2498 .ndo_init
= vxlan_init
,
2499 .ndo_uninit
= vxlan_uninit
,
2500 .ndo_open
= vxlan_open
,
2501 .ndo_stop
= vxlan_stop
,
2502 .ndo_start_xmit
= vxlan_xmit
,
2503 .ndo_get_stats64
= ip_tunnel_get_stats64
,
2504 .ndo_change_mtu
= vxlan_change_mtu
,
2505 .ndo_fill_metadata_dst
= vxlan_fill_metadata_dst
,
2508 /* Info for udev, that this is a virtual tunnel endpoint */
2509 static struct device_type vxlan_type
= {
2513 /* Calls the ndo_add_vxlan_port of the caller in order to
2514 * supply the listening VXLAN udp ports. Callers are expected
2515 * to implement the ndo_add_vxlan_port.
2517 void vxlan_get_rx_port(struct net_device
*dev
)
2519 struct vxlan_sock
*vs
;
2520 struct net
*net
= dev_net(dev
);
2521 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
2522 sa_family_t sa_family
;
2526 spin_lock(&vn
->sock_lock
);
2527 for (i
= 0; i
< PORT_HASH_SIZE
; ++i
) {
2528 hlist_for_each_entry_rcu(vs
, &vn
->sock_list
[i
], hlist
) {
2529 port
= inet_sk(vs
->sock
->sk
)->inet_sport
;
2530 sa_family
= vxlan_get_sk_family(vs
);
2531 dev
->netdev_ops
->ndo_add_vxlan_port(dev
, sa_family
,
2535 spin_unlock(&vn
->sock_lock
);
2537 EXPORT_SYMBOL_GPL(vxlan_get_rx_port
);
2539 /* Initialize the device structure. */
2540 static void vxlan_setup(struct net_device
*dev
)
2542 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2545 dev
->destructor
= free_netdev
;
2546 SET_NETDEV_DEVTYPE(dev
, &vxlan_type
);
2548 dev
->features
|= NETIF_F_LLTX
;
2549 dev
->features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
;
2550 dev
->features
|= NETIF_F_RXCSUM
;
2551 dev
->features
|= NETIF_F_GSO_SOFTWARE
;
2553 dev
->vlan_features
= dev
->features
;
2554 dev
->features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_STAG_TX
;
2555 dev
->hw_features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
| NETIF_F_RXCSUM
;
2556 dev
->hw_features
|= NETIF_F_GSO_SOFTWARE
;
2557 dev
->hw_features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_STAG_TX
;
2558 netif_keep_dst(dev
);
2559 dev
->priv_flags
|= IFF_NO_QUEUE
;
2561 INIT_LIST_HEAD(&vxlan
->next
);
2562 spin_lock_init(&vxlan
->hash_lock
);
2564 init_timer_deferrable(&vxlan
->age_timer
);
2565 vxlan
->age_timer
.function
= vxlan_cleanup
;
2566 vxlan
->age_timer
.data
= (unsigned long) vxlan
;
2568 vxlan
->cfg
.dst_port
= htons(vxlan_port
);
2572 gro_cells_init(&vxlan
->gro_cells
, dev
);
2574 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
)
2575 INIT_HLIST_HEAD(&vxlan
->fdb_head
[h
]);
2578 static void vxlan_ether_setup(struct net_device
*dev
)
2580 eth_hw_addr_random(dev
);
2582 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
2583 dev
->priv_flags
|= IFF_LIVE_ADDR_CHANGE
;
2584 dev
->netdev_ops
= &vxlan_netdev_ether_ops
;
2587 static void vxlan_raw_setup(struct net_device
*dev
)
2589 dev
->type
= ARPHRD_NONE
;
2590 dev
->hard_header_len
= 0;
2592 dev
->mtu
= ETH_DATA_LEN
;
2593 dev
->tx_queue_len
= 1000;
2594 dev
->flags
= IFF_POINTOPOINT
| IFF_NOARP
| IFF_MULTICAST
;
2595 dev
->netdev_ops
= &vxlan_netdev_raw_ops
;
2598 static const struct nla_policy vxlan_policy
[IFLA_VXLAN_MAX
+ 1] = {
2599 [IFLA_VXLAN_ID
] = { .type
= NLA_U32
},
2600 [IFLA_VXLAN_GROUP
] = { .len
= FIELD_SIZEOF(struct iphdr
, daddr
) },
2601 [IFLA_VXLAN_GROUP6
] = { .len
= sizeof(struct in6_addr
) },
2602 [IFLA_VXLAN_LINK
] = { .type
= NLA_U32
},
2603 [IFLA_VXLAN_LOCAL
] = { .len
= FIELD_SIZEOF(struct iphdr
, saddr
) },
2604 [IFLA_VXLAN_LOCAL6
] = { .len
= sizeof(struct in6_addr
) },
2605 [IFLA_VXLAN_TOS
] = { .type
= NLA_U8
},
2606 [IFLA_VXLAN_TTL
] = { .type
= NLA_U8
},
2607 [IFLA_VXLAN_LABEL
] = { .type
= NLA_U32
},
2608 [IFLA_VXLAN_LEARNING
] = { .type
= NLA_U8
},
2609 [IFLA_VXLAN_AGEING
] = { .type
= NLA_U32
},
2610 [IFLA_VXLAN_LIMIT
] = { .type
= NLA_U32
},
2611 [IFLA_VXLAN_PORT_RANGE
] = { .len
= sizeof(struct ifla_vxlan_port_range
) },
2612 [IFLA_VXLAN_PROXY
] = { .type
= NLA_U8
},
2613 [IFLA_VXLAN_RSC
] = { .type
= NLA_U8
},
2614 [IFLA_VXLAN_L2MISS
] = { .type
= NLA_U8
},
2615 [IFLA_VXLAN_L3MISS
] = { .type
= NLA_U8
},
2616 [IFLA_VXLAN_COLLECT_METADATA
] = { .type
= NLA_U8
},
2617 [IFLA_VXLAN_PORT
] = { .type
= NLA_U16
},
2618 [IFLA_VXLAN_UDP_CSUM
] = { .type
= NLA_U8
},
2619 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX
] = { .type
= NLA_U8
},
2620 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX
] = { .type
= NLA_U8
},
2621 [IFLA_VXLAN_REMCSUM_TX
] = { .type
= NLA_U8
},
2622 [IFLA_VXLAN_REMCSUM_RX
] = { .type
= NLA_U8
},
2623 [IFLA_VXLAN_GBP
] = { .type
= NLA_FLAG
, },
2624 [IFLA_VXLAN_GPE
] = { .type
= NLA_FLAG
, },
2625 [IFLA_VXLAN_REMCSUM_NOPARTIAL
] = { .type
= NLA_FLAG
},
2628 static int vxlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
2630 if (tb
[IFLA_ADDRESS
]) {
2631 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
) {
2632 pr_debug("invalid link address (not ethernet)\n");
2636 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
]))) {
2637 pr_debug("invalid all zero ethernet address\n");
2638 return -EADDRNOTAVAIL
;
2645 if (data
[IFLA_VXLAN_ID
]) {
2646 __u32 id
= nla_get_u32(data
[IFLA_VXLAN_ID
]);
2647 if (id
>= VXLAN_VID_MASK
)
2651 if (data
[IFLA_VXLAN_PORT_RANGE
]) {
2652 const struct ifla_vxlan_port_range
*p
2653 = nla_data(data
[IFLA_VXLAN_PORT_RANGE
]);
2655 if (ntohs(p
->high
) < ntohs(p
->low
)) {
2656 pr_debug("port range %u .. %u not valid\n",
2657 ntohs(p
->low
), ntohs(p
->high
));
2665 static void vxlan_get_drvinfo(struct net_device
*netdev
,
2666 struct ethtool_drvinfo
*drvinfo
)
2668 strlcpy(drvinfo
->version
, VXLAN_VERSION
, sizeof(drvinfo
->version
));
2669 strlcpy(drvinfo
->driver
, "vxlan", sizeof(drvinfo
->driver
));
2672 static const struct ethtool_ops vxlan_ethtool_ops
= {
2673 .get_drvinfo
= vxlan_get_drvinfo
,
2674 .get_link
= ethtool_op_get_link
,
2677 static void vxlan_del_work(struct work_struct
*work
)
2679 struct vxlan_sock
*vs
= container_of(work
, struct vxlan_sock
, del_work
);
2680 udp_tunnel_sock_release(vs
->sock
);
2684 static struct socket
*vxlan_create_sock(struct net
*net
, bool ipv6
,
2685 __be16 port
, u32 flags
)
2687 struct socket
*sock
;
2688 struct udp_port_cfg udp_conf
;
2691 memset(&udp_conf
, 0, sizeof(udp_conf
));
2694 udp_conf
.family
= AF_INET6
;
2695 udp_conf
.use_udp6_rx_checksums
=
2696 !(flags
& VXLAN_F_UDP_ZERO_CSUM6_RX
);
2697 udp_conf
.ipv6_v6only
= 1;
2699 udp_conf
.family
= AF_INET
;
2702 udp_conf
.local_udp_port
= port
;
2704 /* Open UDP socket */
2705 err
= udp_sock_create(net
, &udp_conf
, &sock
);
2707 return ERR_PTR(err
);
2712 /* Create new listen socket if needed */
2713 static struct vxlan_sock
*vxlan_socket_create(struct net
*net
, bool ipv6
,
2714 __be16 port
, u32 flags
)
2716 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
2717 struct vxlan_sock
*vs
;
2718 struct socket
*sock
;
2720 struct udp_tunnel_sock_cfg tunnel_cfg
;
2722 vs
= kzalloc(sizeof(*vs
), GFP_KERNEL
);
2724 return ERR_PTR(-ENOMEM
);
2726 for (h
= 0; h
< VNI_HASH_SIZE
; ++h
)
2727 INIT_HLIST_HEAD(&vs
->vni_list
[h
]);
2729 INIT_WORK(&vs
->del_work
, vxlan_del_work
);
2731 sock
= vxlan_create_sock(net
, ipv6
, port
, flags
);
2733 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port
),
2736 return ERR_CAST(sock
);
2740 atomic_set(&vs
->refcnt
, 1);
2741 vs
->flags
= (flags
& VXLAN_F_RCV_FLAGS
);
2743 spin_lock(&vn
->sock_lock
);
2744 hlist_add_head_rcu(&vs
->hlist
, vs_head(net
, port
));
2745 vxlan_notify_add_rx_port(vs
);
2746 spin_unlock(&vn
->sock_lock
);
2748 /* Mark socket as an encapsulation socket. */
2749 memset(&tunnel_cfg
, 0, sizeof(tunnel_cfg
));
2750 tunnel_cfg
.sk_user_data
= vs
;
2751 tunnel_cfg
.encap_type
= 1;
2752 tunnel_cfg
.encap_rcv
= vxlan_rcv
;
2753 tunnel_cfg
.encap_destroy
= NULL
;
2754 tunnel_cfg
.gro_receive
= vxlan_gro_receive
;
2755 tunnel_cfg
.gro_complete
= vxlan_gro_complete
;
2757 setup_udp_tunnel_sock(net
, sock
, &tunnel_cfg
);
2762 static int __vxlan_sock_add(struct vxlan_dev
*vxlan
, bool ipv6
)
2764 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2765 struct vxlan_sock
*vs
= NULL
;
2767 if (!vxlan
->cfg
.no_share
) {
2768 spin_lock(&vn
->sock_lock
);
2769 vs
= vxlan_find_sock(vxlan
->net
, ipv6
? AF_INET6
: AF_INET
,
2770 vxlan
->cfg
.dst_port
, vxlan
->flags
);
2771 if (vs
&& !atomic_add_unless(&vs
->refcnt
, 1, 0)) {
2772 spin_unlock(&vn
->sock_lock
);
2775 spin_unlock(&vn
->sock_lock
);
2778 vs
= vxlan_socket_create(vxlan
->net
, ipv6
,
2779 vxlan
->cfg
.dst_port
, vxlan
->flags
);
2782 #if IS_ENABLED(CONFIG_IPV6)
2784 vxlan
->vn6_sock
= vs
;
2787 vxlan
->vn4_sock
= vs
;
2788 vxlan_vs_add_dev(vs
, vxlan
);
2792 static int vxlan_sock_add(struct vxlan_dev
*vxlan
)
2794 bool ipv6
= vxlan
->flags
& VXLAN_F_IPV6
;
2795 bool metadata
= vxlan
->flags
& VXLAN_F_COLLECT_METADATA
;
2798 vxlan
->vn4_sock
= NULL
;
2799 #if IS_ENABLED(CONFIG_IPV6)
2800 vxlan
->vn6_sock
= NULL
;
2801 if (ipv6
|| metadata
)
2802 ret
= __vxlan_sock_add(vxlan
, true);
2804 if (!ret
&& (!ipv6
|| metadata
))
2805 ret
= __vxlan_sock_add(vxlan
, false);
2807 vxlan_sock_release(vxlan
);
2811 static int vxlan_dev_configure(struct net
*src_net
, struct net_device
*dev
,
2812 struct vxlan_config
*conf
)
2814 struct vxlan_net
*vn
= net_generic(src_net
, vxlan_net_id
);
2815 struct vxlan_dev
*vxlan
= netdev_priv(dev
), *tmp
;
2816 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
2817 unsigned short needed_headroom
= ETH_HLEN
;
2819 bool use_ipv6
= false;
2820 __be16 default_port
= vxlan
->cfg
.dst_port
;
2821 struct net_device
*lowerdev
= NULL
;
2823 if (conf
->flags
& VXLAN_F_GPE
) {
2824 if (conf
->flags
& ~VXLAN_F_ALLOWED_GPE
)
2826 /* For now, allow GPE only together with COLLECT_METADATA.
2827 * This can be relaxed later; in such case, the other side
2828 * of the PtP link will have to be provided.
2830 if (!(conf
->flags
& VXLAN_F_COLLECT_METADATA
))
2833 vxlan_raw_setup(dev
);
2835 vxlan_ether_setup(dev
);
2838 vxlan
->net
= src_net
;
2840 dst
->remote_vni
= conf
->vni
;
2842 memcpy(&dst
->remote_ip
, &conf
->remote_ip
, sizeof(conf
->remote_ip
));
2844 /* Unless IPv6 is explicitly requested, assume IPv4 */
2845 if (!dst
->remote_ip
.sa
.sa_family
)
2846 dst
->remote_ip
.sa
.sa_family
= AF_INET
;
2848 if (dst
->remote_ip
.sa
.sa_family
== AF_INET6
||
2849 vxlan
->cfg
.saddr
.sa
.sa_family
== AF_INET6
) {
2850 if (!IS_ENABLED(CONFIG_IPV6
))
2851 return -EPFNOSUPPORT
;
2853 vxlan
->flags
|= VXLAN_F_IPV6
;
2856 if (conf
->label
&& !use_ipv6
) {
2857 pr_info("label only supported in use with IPv6\n");
2861 if (conf
->remote_ifindex
) {
2862 lowerdev
= __dev_get_by_index(src_net
, conf
->remote_ifindex
);
2863 dst
->remote_ifindex
= conf
->remote_ifindex
;
2866 pr_info("ifindex %d does not exist\n", dst
->remote_ifindex
);
2870 #if IS_ENABLED(CONFIG_IPV6)
2872 struct inet6_dev
*idev
= __in6_dev_get(lowerdev
);
2873 if (idev
&& idev
->cnf
.disable_ipv6
) {
2874 pr_info("IPv6 is disabled via sysctl\n");
2881 dev
->mtu
= lowerdev
->mtu
- (use_ipv6
? VXLAN6_HEADROOM
: VXLAN_HEADROOM
);
2883 needed_headroom
= lowerdev
->hard_header_len
;
2887 err
= __vxlan_change_mtu(dev
, lowerdev
, dst
, conf
->mtu
, false);
2892 if (use_ipv6
|| conf
->flags
& VXLAN_F_COLLECT_METADATA
)
2893 needed_headroom
+= VXLAN6_HEADROOM
;
2895 needed_headroom
+= VXLAN_HEADROOM
;
2896 dev
->needed_headroom
= needed_headroom
;
2898 memcpy(&vxlan
->cfg
, conf
, sizeof(*conf
));
2899 if (!vxlan
->cfg
.dst_port
) {
2900 if (conf
->flags
& VXLAN_F_GPE
)
2901 vxlan
->cfg
.dst_port
= 4790; /* IANA assigned VXLAN-GPE port */
2903 vxlan
->cfg
.dst_port
= default_port
;
2905 vxlan
->flags
|= conf
->flags
;
2907 if (!vxlan
->cfg
.age_interval
)
2908 vxlan
->cfg
.age_interval
= FDB_AGE_DEFAULT
;
2910 list_for_each_entry(tmp
, &vn
->vxlan_list
, next
) {
2911 if (tmp
->cfg
.vni
== conf
->vni
&&
2912 (tmp
->default_dst
.remote_ip
.sa
.sa_family
== AF_INET6
||
2913 tmp
->cfg
.saddr
.sa
.sa_family
== AF_INET6
) == use_ipv6
&&
2914 tmp
->cfg
.dst_port
== vxlan
->cfg
.dst_port
&&
2915 (tmp
->flags
& VXLAN_F_RCV_FLAGS
) ==
2916 (vxlan
->flags
& VXLAN_F_RCV_FLAGS
))
2920 dev
->ethtool_ops
= &vxlan_ethtool_ops
;
2922 /* create an fdb entry for a valid default destination */
2923 if (!vxlan_addr_any(&vxlan
->default_dst
.remote_ip
)) {
2924 err
= vxlan_fdb_create(vxlan
, all_zeros_mac
,
2925 &vxlan
->default_dst
.remote_ip
,
2926 NUD_REACHABLE
|NUD_PERMANENT
,
2927 NLM_F_EXCL
|NLM_F_CREATE
,
2928 vxlan
->cfg
.dst_port
,
2929 vxlan
->default_dst
.remote_vni
,
2930 vxlan
->default_dst
.remote_ifindex
,
2936 err
= register_netdevice(dev
);
2938 vxlan_fdb_delete_default(vxlan
);
2942 list_add(&vxlan
->next
, &vn
->vxlan_list
);
2947 struct net_device
*vxlan_dev_create(struct net
*net
, const char *name
,
2948 u8 name_assign_type
, struct vxlan_config
*conf
)
2950 struct nlattr
*tb
[IFLA_MAX
+1];
2951 struct net_device
*dev
;
2954 memset(&tb
, 0, sizeof(tb
));
2956 dev
= rtnl_create_link(net
, name
, name_assign_type
,
2957 &vxlan_link_ops
, tb
);
2961 err
= vxlan_dev_configure(net
, dev
, conf
);
2964 return ERR_PTR(err
);
2969 EXPORT_SYMBOL_GPL(vxlan_dev_create
);
2971 static int vxlan_newlink(struct net
*src_net
, struct net_device
*dev
,
2972 struct nlattr
*tb
[], struct nlattr
*data
[])
2974 struct vxlan_config conf
;
2977 memset(&conf
, 0, sizeof(conf
));
2979 if (data
[IFLA_VXLAN_ID
])
2980 conf
.vni
= cpu_to_be32(nla_get_u32(data
[IFLA_VXLAN_ID
]));
2982 if (data
[IFLA_VXLAN_GROUP
]) {
2983 conf
.remote_ip
.sin
.sin_addr
.s_addr
= nla_get_in_addr(data
[IFLA_VXLAN_GROUP
]);
2984 } else if (data
[IFLA_VXLAN_GROUP6
]) {
2985 if (!IS_ENABLED(CONFIG_IPV6
))
2986 return -EPFNOSUPPORT
;
2988 conf
.remote_ip
.sin6
.sin6_addr
= nla_get_in6_addr(data
[IFLA_VXLAN_GROUP6
]);
2989 conf
.remote_ip
.sa
.sa_family
= AF_INET6
;
2992 if (data
[IFLA_VXLAN_LOCAL
]) {
2993 conf
.saddr
.sin
.sin_addr
.s_addr
= nla_get_in_addr(data
[IFLA_VXLAN_LOCAL
]);
2994 conf
.saddr
.sa
.sa_family
= AF_INET
;
2995 } else if (data
[IFLA_VXLAN_LOCAL6
]) {
2996 if (!IS_ENABLED(CONFIG_IPV6
))
2997 return -EPFNOSUPPORT
;
2999 /* TODO: respect scope id */
3000 conf
.saddr
.sin6
.sin6_addr
= nla_get_in6_addr(data
[IFLA_VXLAN_LOCAL6
]);
3001 conf
.saddr
.sa
.sa_family
= AF_INET6
;
3004 if (data
[IFLA_VXLAN_LINK
])
3005 conf
.remote_ifindex
= nla_get_u32(data
[IFLA_VXLAN_LINK
]);
3007 if (data
[IFLA_VXLAN_TOS
])
3008 conf
.tos
= nla_get_u8(data
[IFLA_VXLAN_TOS
]);
3010 if (data
[IFLA_VXLAN_TTL
])
3011 conf
.ttl
= nla_get_u8(data
[IFLA_VXLAN_TTL
]);
3013 if (data
[IFLA_VXLAN_LABEL
])
3014 conf
.label
= nla_get_be32(data
[IFLA_VXLAN_LABEL
]) &
3015 IPV6_FLOWLABEL_MASK
;
3017 if (!data
[IFLA_VXLAN_LEARNING
] || nla_get_u8(data
[IFLA_VXLAN_LEARNING
]))
3018 conf
.flags
|= VXLAN_F_LEARN
;
3020 if (data
[IFLA_VXLAN_AGEING
])
3021 conf
.age_interval
= nla_get_u32(data
[IFLA_VXLAN_AGEING
]);
3023 if (data
[IFLA_VXLAN_PROXY
] && nla_get_u8(data
[IFLA_VXLAN_PROXY
]))
3024 conf
.flags
|= VXLAN_F_PROXY
;
3026 if (data
[IFLA_VXLAN_RSC
] && nla_get_u8(data
[IFLA_VXLAN_RSC
]))
3027 conf
.flags
|= VXLAN_F_RSC
;
3029 if (data
[IFLA_VXLAN_L2MISS
] && nla_get_u8(data
[IFLA_VXLAN_L2MISS
]))
3030 conf
.flags
|= VXLAN_F_L2MISS
;
3032 if (data
[IFLA_VXLAN_L3MISS
] && nla_get_u8(data
[IFLA_VXLAN_L3MISS
]))
3033 conf
.flags
|= VXLAN_F_L3MISS
;
3035 if (data
[IFLA_VXLAN_LIMIT
])
3036 conf
.addrmax
= nla_get_u32(data
[IFLA_VXLAN_LIMIT
]);
3038 if (data
[IFLA_VXLAN_COLLECT_METADATA
] &&
3039 nla_get_u8(data
[IFLA_VXLAN_COLLECT_METADATA
]))
3040 conf
.flags
|= VXLAN_F_COLLECT_METADATA
;
3042 if (data
[IFLA_VXLAN_PORT_RANGE
]) {
3043 const struct ifla_vxlan_port_range
*p
3044 = nla_data(data
[IFLA_VXLAN_PORT_RANGE
]);
3045 conf
.port_min
= ntohs(p
->low
);
3046 conf
.port_max
= ntohs(p
->high
);
3049 if (data
[IFLA_VXLAN_PORT
])
3050 conf
.dst_port
= nla_get_be16(data
[IFLA_VXLAN_PORT
]);
3052 if (data
[IFLA_VXLAN_UDP_CSUM
] &&
3053 !nla_get_u8(data
[IFLA_VXLAN_UDP_CSUM
]))
3054 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM_TX
;
3056 if (data
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
] &&
3057 nla_get_u8(data
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
]))
3058 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM6_TX
;
3060 if (data
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
] &&
3061 nla_get_u8(data
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
]))
3062 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM6_RX
;
3064 if (data
[IFLA_VXLAN_REMCSUM_TX
] &&
3065 nla_get_u8(data
[IFLA_VXLAN_REMCSUM_TX
]))
3066 conf
.flags
|= VXLAN_F_REMCSUM_TX
;
3068 if (data
[IFLA_VXLAN_REMCSUM_RX
] &&
3069 nla_get_u8(data
[IFLA_VXLAN_REMCSUM_RX
]))
3070 conf
.flags
|= VXLAN_F_REMCSUM_RX
;
3072 if (data
[IFLA_VXLAN_GBP
])
3073 conf
.flags
|= VXLAN_F_GBP
;
3075 if (data
[IFLA_VXLAN_GPE
])
3076 conf
.flags
|= VXLAN_F_GPE
;
3078 if (data
[IFLA_VXLAN_REMCSUM_NOPARTIAL
])
3079 conf
.flags
|= VXLAN_F_REMCSUM_NOPARTIAL
;
3081 err
= vxlan_dev_configure(src_net
, dev
, &conf
);
3084 pr_info("ifindex %d does not exist\n", conf
.remote_ifindex
);
3088 pr_info("IPv6 is disabled via sysctl\n");
3092 pr_info("duplicate VNI %u\n", be32_to_cpu(conf
.vni
));
3096 pr_info("unsupported combination of extensions\n");
3103 static void vxlan_dellink(struct net_device
*dev
, struct list_head
*head
)
3105 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3106 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
3108 spin_lock(&vn
->sock_lock
);
3109 if (!hlist_unhashed(&vxlan
->hlist
))
3110 hlist_del_rcu(&vxlan
->hlist
);
3111 spin_unlock(&vn
->sock_lock
);
3113 gro_cells_destroy(&vxlan
->gro_cells
);
3114 list_del(&vxlan
->next
);
3115 unregister_netdevice_queue(dev
, head
);
3118 static size_t vxlan_get_size(const struct net_device
*dev
)
3121 return nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_ID */
3122 nla_total_size(sizeof(struct in6_addr
)) + /* IFLA_VXLAN_GROUP{6} */
3123 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_LINK */
3124 nla_total_size(sizeof(struct in6_addr
)) + /* IFLA_VXLAN_LOCAL{6} */
3125 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_TTL */
3126 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_TOS */
3127 nla_total_size(sizeof(__be32
)) + /* IFLA_VXLAN_LABEL */
3128 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_LEARNING */
3129 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_PROXY */
3130 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_RSC */
3131 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_L2MISS */
3132 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_L3MISS */
3133 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_COLLECT_METADATA */
3134 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_AGEING */
3135 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_LIMIT */
3136 nla_total_size(sizeof(struct ifla_vxlan_port_range
)) +
3137 nla_total_size(sizeof(__be16
)) + /* IFLA_VXLAN_PORT */
3138 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_CSUM */
3139 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3140 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
3141 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_REMCSUM_TX */
3142 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_REMCSUM_RX */
3146 static int vxlan_fill_info(struct sk_buff
*skb
, const struct net_device
*dev
)
3148 const struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3149 const struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
3150 struct ifla_vxlan_port_range ports
= {
3151 .low
= htons(vxlan
->cfg
.port_min
),
3152 .high
= htons(vxlan
->cfg
.port_max
),
3155 if (nla_put_u32(skb
, IFLA_VXLAN_ID
, be32_to_cpu(dst
->remote_vni
)))
3156 goto nla_put_failure
;
3158 if (!vxlan_addr_any(&dst
->remote_ip
)) {
3159 if (dst
->remote_ip
.sa
.sa_family
== AF_INET
) {
3160 if (nla_put_in_addr(skb
, IFLA_VXLAN_GROUP
,
3161 dst
->remote_ip
.sin
.sin_addr
.s_addr
))
3162 goto nla_put_failure
;
3163 #if IS_ENABLED(CONFIG_IPV6)
3165 if (nla_put_in6_addr(skb
, IFLA_VXLAN_GROUP6
,
3166 &dst
->remote_ip
.sin6
.sin6_addr
))
3167 goto nla_put_failure
;
3172 if (dst
->remote_ifindex
&& nla_put_u32(skb
, IFLA_VXLAN_LINK
, dst
->remote_ifindex
))
3173 goto nla_put_failure
;
3175 if (!vxlan_addr_any(&vxlan
->cfg
.saddr
)) {
3176 if (vxlan
->cfg
.saddr
.sa
.sa_family
== AF_INET
) {
3177 if (nla_put_in_addr(skb
, IFLA_VXLAN_LOCAL
,
3178 vxlan
->cfg
.saddr
.sin
.sin_addr
.s_addr
))
3179 goto nla_put_failure
;
3180 #if IS_ENABLED(CONFIG_IPV6)
3182 if (nla_put_in6_addr(skb
, IFLA_VXLAN_LOCAL6
,
3183 &vxlan
->cfg
.saddr
.sin6
.sin6_addr
))
3184 goto nla_put_failure
;
3189 if (nla_put_u8(skb
, IFLA_VXLAN_TTL
, vxlan
->cfg
.ttl
) ||
3190 nla_put_u8(skb
, IFLA_VXLAN_TOS
, vxlan
->cfg
.tos
) ||
3191 nla_put_be32(skb
, IFLA_VXLAN_LABEL
, vxlan
->cfg
.label
) ||
3192 nla_put_u8(skb
, IFLA_VXLAN_LEARNING
,
3193 !!(vxlan
->flags
& VXLAN_F_LEARN
)) ||
3194 nla_put_u8(skb
, IFLA_VXLAN_PROXY
,
3195 !!(vxlan
->flags
& VXLAN_F_PROXY
)) ||
3196 nla_put_u8(skb
, IFLA_VXLAN_RSC
, !!(vxlan
->flags
& VXLAN_F_RSC
)) ||
3197 nla_put_u8(skb
, IFLA_VXLAN_L2MISS
,
3198 !!(vxlan
->flags
& VXLAN_F_L2MISS
)) ||
3199 nla_put_u8(skb
, IFLA_VXLAN_L3MISS
,
3200 !!(vxlan
->flags
& VXLAN_F_L3MISS
)) ||
3201 nla_put_u8(skb
, IFLA_VXLAN_COLLECT_METADATA
,
3202 !!(vxlan
->flags
& VXLAN_F_COLLECT_METADATA
)) ||
3203 nla_put_u32(skb
, IFLA_VXLAN_AGEING
, vxlan
->cfg
.age_interval
) ||
3204 nla_put_u32(skb
, IFLA_VXLAN_LIMIT
, vxlan
->cfg
.addrmax
) ||
3205 nla_put_be16(skb
, IFLA_VXLAN_PORT
, vxlan
->cfg
.dst_port
) ||
3206 nla_put_u8(skb
, IFLA_VXLAN_UDP_CSUM
,
3207 !(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM_TX
)) ||
3208 nla_put_u8(skb
, IFLA_VXLAN_UDP_ZERO_CSUM6_TX
,
3209 !!(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM6_TX
)) ||
3210 nla_put_u8(skb
, IFLA_VXLAN_UDP_ZERO_CSUM6_RX
,
3211 !!(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM6_RX
)) ||
3212 nla_put_u8(skb
, IFLA_VXLAN_REMCSUM_TX
,
3213 !!(vxlan
->flags
& VXLAN_F_REMCSUM_TX
)) ||
3214 nla_put_u8(skb
, IFLA_VXLAN_REMCSUM_RX
,
3215 !!(vxlan
->flags
& VXLAN_F_REMCSUM_RX
)))
3216 goto nla_put_failure
;
3218 if (nla_put(skb
, IFLA_VXLAN_PORT_RANGE
, sizeof(ports
), &ports
))
3219 goto nla_put_failure
;
3221 if (vxlan
->flags
& VXLAN_F_GBP
&&
3222 nla_put_flag(skb
, IFLA_VXLAN_GBP
))
3223 goto nla_put_failure
;
3225 if (vxlan
->flags
& VXLAN_F_GPE
&&
3226 nla_put_flag(skb
, IFLA_VXLAN_GPE
))
3227 goto nla_put_failure
;
3229 if (vxlan
->flags
& VXLAN_F_REMCSUM_NOPARTIAL
&&
3230 nla_put_flag(skb
, IFLA_VXLAN_REMCSUM_NOPARTIAL
))
3231 goto nla_put_failure
;
3239 static struct net
*vxlan_get_link_net(const struct net_device
*dev
)
3241 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3246 static struct rtnl_link_ops vxlan_link_ops __read_mostly
= {
3248 .maxtype
= IFLA_VXLAN_MAX
,
3249 .policy
= vxlan_policy
,
3250 .priv_size
= sizeof(struct vxlan_dev
),
3251 .setup
= vxlan_setup
,
3252 .validate
= vxlan_validate
,
3253 .newlink
= vxlan_newlink
,
3254 .dellink
= vxlan_dellink
,
3255 .get_size
= vxlan_get_size
,
3256 .fill_info
= vxlan_fill_info
,
3257 .get_link_net
= vxlan_get_link_net
,
3260 static void vxlan_handle_lowerdev_unregister(struct vxlan_net
*vn
,
3261 struct net_device
*dev
)
3263 struct vxlan_dev
*vxlan
, *next
;
3264 LIST_HEAD(list_kill
);
3266 list_for_each_entry_safe(vxlan
, next
, &vn
->vxlan_list
, next
) {
3267 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
3269 /* In case we created vxlan device with carrier
3270 * and we loose the carrier due to module unload
3271 * we also need to remove vxlan device. In other
3272 * cases, it's not necessary and remote_ifindex
3273 * is 0 here, so no matches.
3275 if (dst
->remote_ifindex
== dev
->ifindex
)
3276 vxlan_dellink(vxlan
->dev
, &list_kill
);
3279 unregister_netdevice_many(&list_kill
);
3282 static int vxlan_lowerdev_event(struct notifier_block
*unused
,
3283 unsigned long event
, void *ptr
)
3285 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3286 struct vxlan_net
*vn
= net_generic(dev_net(dev
), vxlan_net_id
);
3288 if (event
== NETDEV_UNREGISTER
)
3289 vxlan_handle_lowerdev_unregister(vn
, dev
);
3294 static struct notifier_block vxlan_notifier_block __read_mostly
= {
3295 .notifier_call
= vxlan_lowerdev_event
,
3298 static __net_init
int vxlan_init_net(struct net
*net
)
3300 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
3303 INIT_LIST_HEAD(&vn
->vxlan_list
);
3304 spin_lock_init(&vn
->sock_lock
);
3306 for (h
= 0; h
< PORT_HASH_SIZE
; ++h
)
3307 INIT_HLIST_HEAD(&vn
->sock_list
[h
]);
3312 static void __net_exit
vxlan_exit_net(struct net
*net
)
3314 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
3315 struct vxlan_dev
*vxlan
, *next
;
3316 struct net_device
*dev
, *aux
;
3320 for_each_netdev_safe(net
, dev
, aux
)
3321 if (dev
->rtnl_link_ops
== &vxlan_link_ops
)
3322 unregister_netdevice_queue(dev
, &list
);
3324 list_for_each_entry_safe(vxlan
, next
, &vn
->vxlan_list
, next
) {
3325 /* If vxlan->dev is in the same netns, it has already been added
3326 * to the list by the previous loop.
3328 if (!net_eq(dev_net(vxlan
->dev
), net
)) {
3329 gro_cells_destroy(&vxlan
->gro_cells
);
3330 unregister_netdevice_queue(vxlan
->dev
, &list
);
3334 unregister_netdevice_many(&list
);
3338 static struct pernet_operations vxlan_net_ops
= {
3339 .init
= vxlan_init_net
,
3340 .exit
= vxlan_exit_net
,
3341 .id
= &vxlan_net_id
,
3342 .size
= sizeof(struct vxlan_net
),
3345 static int __init
vxlan_init_module(void)
3349 vxlan_wq
= alloc_workqueue("vxlan", 0, 0);
3353 get_random_bytes(&vxlan_salt
, sizeof(vxlan_salt
));
3355 rc
= register_pernet_subsys(&vxlan_net_ops
);
3359 rc
= register_netdevice_notifier(&vxlan_notifier_block
);
3363 rc
= rtnl_link_register(&vxlan_link_ops
);
3369 unregister_netdevice_notifier(&vxlan_notifier_block
);
3371 unregister_pernet_subsys(&vxlan_net_ops
);
3373 destroy_workqueue(vxlan_wq
);
3376 late_initcall(vxlan_init_module
);
3378 static void __exit
vxlan_cleanup_module(void)
3380 rtnl_link_unregister(&vxlan_link_ops
);
3381 unregister_netdevice_notifier(&vxlan_notifier_block
);
3382 destroy_workqueue(vxlan_wq
);
3383 unregister_pernet_subsys(&vxlan_net_ops
);
3384 /* rcu_barrier() is called by netns */
3386 module_exit(vxlan_cleanup_module
);
3388 MODULE_LICENSE("GPL");
3389 MODULE_VERSION(VXLAN_VERSION
);
3390 MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
3391 MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
3392 MODULE_ALIAS_RTNL_LINK("vxlan");