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/module.h>
15 #include <linux/errno.h>
16 #include <linux/slab.h>
17 #include <linux/udp.h>
18 #include <linux/igmp.h>
19 #include <linux/if_ether.h>
20 #include <linux/ethtool.h>
22 #include <net/ndisc.h>
25 #include <net/rtnetlink.h>
26 #include <net/inet_ecn.h>
27 #include <net/net_namespace.h>
28 #include <net/netns/generic.h>
29 #include <net/vxlan.h>
31 #if IS_ENABLED(CONFIG_IPV6)
32 #include <net/ip6_tunnel.h>
33 #include <net/ip6_checksum.h>
36 #define VXLAN_VERSION "0.1"
38 #define PORT_HASH_BITS 8
39 #define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
40 #define FDB_AGE_DEFAULT 300 /* 5 min */
41 #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
43 /* UDP port for VXLAN traffic.
44 * The IANA assigned port is 4789, but the Linux default is 8472
45 * for compatibility with early adopters.
47 static unsigned short vxlan_port __read_mostly
= 8472;
48 module_param_named(udp_port
, vxlan_port
, ushort
, 0444);
49 MODULE_PARM_DESC(udp_port
, "Destination UDP port");
51 static bool log_ecn_error
= true;
52 module_param(log_ecn_error
, bool, 0644);
53 MODULE_PARM_DESC(log_ecn_error
, "Log packets received with corrupted ECN");
55 static unsigned int vxlan_net_id
;
56 static struct rtnl_link_ops vxlan_link_ops
;
58 static const u8 all_zeros_mac
[ETH_ALEN
+ 2];
60 static int vxlan_sock_add(struct vxlan_dev
*vxlan
);
62 /* per-network namespace private data for this module */
64 struct list_head vxlan_list
;
65 struct hlist_head sock_list
[PORT_HASH_SIZE
];
69 /* Forwarding table entry */
71 struct hlist_node hlist
; /* linked list of entries */
73 unsigned long updated
; /* jiffies */
75 struct list_head remotes
;
76 u8 eth_addr
[ETH_ALEN
];
77 u16 state
; /* see ndm_state */
78 u8 flags
; /* see ndm_flags */
81 /* salt for hash table */
82 static u32 vxlan_salt __read_mostly
;
84 static inline bool vxlan_collect_metadata(struct vxlan_sock
*vs
)
86 return vs
->flags
& VXLAN_F_COLLECT_METADATA
||
87 ip_tunnel_collect_metadata();
90 #if IS_ENABLED(CONFIG_IPV6)
92 bool vxlan_addr_equal(const union vxlan_addr
*a
, const union vxlan_addr
*b
)
94 if (a
->sa
.sa_family
!= b
->sa
.sa_family
)
96 if (a
->sa
.sa_family
== AF_INET6
)
97 return ipv6_addr_equal(&a
->sin6
.sin6_addr
, &b
->sin6
.sin6_addr
);
99 return a
->sin
.sin_addr
.s_addr
== b
->sin
.sin_addr
.s_addr
;
102 static inline bool vxlan_addr_any(const union vxlan_addr
*ipa
)
104 if (ipa
->sa
.sa_family
== AF_INET6
)
105 return ipv6_addr_any(&ipa
->sin6
.sin6_addr
);
107 return ipa
->sin
.sin_addr
.s_addr
== htonl(INADDR_ANY
);
110 static inline bool vxlan_addr_multicast(const union vxlan_addr
*ipa
)
112 if (ipa
->sa
.sa_family
== AF_INET6
)
113 return ipv6_addr_is_multicast(&ipa
->sin6
.sin6_addr
);
115 return IN_MULTICAST(ntohl(ipa
->sin
.sin_addr
.s_addr
));
118 static int vxlan_nla_get_addr(union vxlan_addr
*ip
, struct nlattr
*nla
)
120 if (nla_len(nla
) >= sizeof(struct in6_addr
)) {
121 ip
->sin6
.sin6_addr
= nla_get_in6_addr(nla
);
122 ip
->sa
.sa_family
= AF_INET6
;
124 } else if (nla_len(nla
) >= sizeof(__be32
)) {
125 ip
->sin
.sin_addr
.s_addr
= nla_get_in_addr(nla
);
126 ip
->sa
.sa_family
= AF_INET
;
129 return -EAFNOSUPPORT
;
133 static int vxlan_nla_put_addr(struct sk_buff
*skb
, int attr
,
134 const union vxlan_addr
*ip
)
136 if (ip
->sa
.sa_family
== AF_INET6
)
137 return nla_put_in6_addr(skb
, attr
, &ip
->sin6
.sin6_addr
);
139 return nla_put_in_addr(skb
, attr
, ip
->sin
.sin_addr
.s_addr
);
142 #else /* !CONFIG_IPV6 */
145 bool vxlan_addr_equal(const union vxlan_addr
*a
, const union vxlan_addr
*b
)
147 return a
->sin
.sin_addr
.s_addr
== b
->sin
.sin_addr
.s_addr
;
150 static inline bool vxlan_addr_any(const union vxlan_addr
*ipa
)
152 return ipa
->sin
.sin_addr
.s_addr
== htonl(INADDR_ANY
);
155 static inline bool vxlan_addr_multicast(const union vxlan_addr
*ipa
)
157 return IN_MULTICAST(ntohl(ipa
->sin
.sin_addr
.s_addr
));
160 static int vxlan_nla_get_addr(union vxlan_addr
*ip
, struct nlattr
*nla
)
162 if (nla_len(nla
) >= sizeof(struct in6_addr
)) {
163 return -EAFNOSUPPORT
;
164 } else if (nla_len(nla
) >= sizeof(__be32
)) {
165 ip
->sin
.sin_addr
.s_addr
= nla_get_in_addr(nla
);
166 ip
->sa
.sa_family
= AF_INET
;
169 return -EAFNOSUPPORT
;
173 static int vxlan_nla_put_addr(struct sk_buff
*skb
, int attr
,
174 const union vxlan_addr
*ip
)
176 return nla_put_in_addr(skb
, attr
, ip
->sin
.sin_addr
.s_addr
);
180 /* Virtual Network hash table head */
181 static inline struct hlist_head
*vni_head(struct vxlan_sock
*vs
, __be32 vni
)
183 return &vs
->vni_list
[hash_32((__force u32
)vni
, VNI_HASH_BITS
)];
186 /* Socket hash table head */
187 static inline struct hlist_head
*vs_head(struct net
*net
, __be16 port
)
189 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
191 return &vn
->sock_list
[hash_32(ntohs(port
), PORT_HASH_BITS
)];
194 /* First remote destination for a forwarding entry.
195 * Guaranteed to be non-NULL because remotes are never deleted.
197 static inline struct vxlan_rdst
*first_remote_rcu(struct vxlan_fdb
*fdb
)
199 return list_entry_rcu(fdb
->remotes
.next
, struct vxlan_rdst
, list
);
202 static inline struct vxlan_rdst
*first_remote_rtnl(struct vxlan_fdb
*fdb
)
204 return list_first_entry(&fdb
->remotes
, struct vxlan_rdst
, list
);
207 /* Find VXLAN socket based on network namespace, address family and UDP port
208 * and enabled unshareable flags.
210 static struct vxlan_sock
*vxlan_find_sock(struct net
*net
, sa_family_t family
,
211 __be16 port
, u32 flags
)
213 struct vxlan_sock
*vs
;
215 flags
&= VXLAN_F_RCV_FLAGS
;
217 hlist_for_each_entry_rcu(vs
, vs_head(net
, port
), hlist
) {
218 if (inet_sk(vs
->sock
->sk
)->inet_sport
== port
&&
219 vxlan_get_sk_family(vs
) == family
&&
226 static struct vxlan_dev
*vxlan_vs_find_vni(struct vxlan_sock
*vs
, __be32 vni
)
228 struct vxlan_dev
*vxlan
;
230 /* For flow based devices, map all packets to VNI 0 */
231 if (vs
->flags
& VXLAN_F_COLLECT_METADATA
)
234 hlist_for_each_entry_rcu(vxlan
, vni_head(vs
, vni
), hlist
) {
235 if (vxlan
->default_dst
.remote_vni
== vni
)
242 /* Look up VNI in a per net namespace table */
243 static struct vxlan_dev
*vxlan_find_vni(struct net
*net
, __be32 vni
,
244 sa_family_t family
, __be16 port
,
247 struct vxlan_sock
*vs
;
249 vs
= vxlan_find_sock(net
, family
, port
, flags
);
253 return vxlan_vs_find_vni(vs
, vni
);
256 /* Fill in neighbour message in skbuff. */
257 static int vxlan_fdb_info(struct sk_buff
*skb
, struct vxlan_dev
*vxlan
,
258 const struct vxlan_fdb
*fdb
,
259 u32 portid
, u32 seq
, int type
, unsigned int flags
,
260 const struct vxlan_rdst
*rdst
)
262 unsigned long now
= jiffies
;
263 struct nda_cacheinfo ci
;
264 struct nlmsghdr
*nlh
;
266 bool send_ip
, send_eth
;
268 nlh
= nlmsg_put(skb
, portid
, seq
, type
, sizeof(*ndm
), flags
);
272 ndm
= nlmsg_data(nlh
);
273 memset(ndm
, 0, sizeof(*ndm
));
275 send_eth
= send_ip
= true;
277 if (type
== RTM_GETNEIGH
) {
278 ndm
->ndm_family
= AF_INET
;
279 send_ip
= !vxlan_addr_any(&rdst
->remote_ip
);
280 send_eth
= !is_zero_ether_addr(fdb
->eth_addr
);
282 ndm
->ndm_family
= AF_BRIDGE
;
283 ndm
->ndm_state
= fdb
->state
;
284 ndm
->ndm_ifindex
= vxlan
->dev
->ifindex
;
285 ndm
->ndm_flags
= fdb
->flags
;
286 ndm
->ndm_type
= RTN_UNICAST
;
288 if (!net_eq(dev_net(vxlan
->dev
), vxlan
->net
) &&
289 nla_put_s32(skb
, NDA_LINK_NETNSID
,
290 peernet2id(dev_net(vxlan
->dev
), vxlan
->net
)))
291 goto nla_put_failure
;
293 if (send_eth
&& nla_put(skb
, NDA_LLADDR
, ETH_ALEN
, &fdb
->eth_addr
))
294 goto nla_put_failure
;
296 if (send_ip
&& vxlan_nla_put_addr(skb
, NDA_DST
, &rdst
->remote_ip
))
297 goto nla_put_failure
;
299 if (rdst
->remote_port
&& rdst
->remote_port
!= vxlan
->cfg
.dst_port
&&
300 nla_put_be16(skb
, NDA_PORT
, rdst
->remote_port
))
301 goto nla_put_failure
;
302 if (rdst
->remote_vni
!= vxlan
->default_dst
.remote_vni
&&
303 nla_put_u32(skb
, NDA_VNI
, be32_to_cpu(rdst
->remote_vni
)))
304 goto nla_put_failure
;
305 if (rdst
->remote_ifindex
&&
306 nla_put_u32(skb
, NDA_IFINDEX
, rdst
->remote_ifindex
))
307 goto nla_put_failure
;
309 ci
.ndm_used
= jiffies_to_clock_t(now
- fdb
->used
);
310 ci
.ndm_confirmed
= 0;
311 ci
.ndm_updated
= jiffies_to_clock_t(now
- fdb
->updated
);
314 if (nla_put(skb
, NDA_CACHEINFO
, sizeof(ci
), &ci
))
315 goto nla_put_failure
;
321 nlmsg_cancel(skb
, nlh
);
325 static inline size_t vxlan_nlmsg_size(void)
327 return NLMSG_ALIGN(sizeof(struct ndmsg
))
328 + nla_total_size(ETH_ALEN
) /* NDA_LLADDR */
329 + nla_total_size(sizeof(struct in6_addr
)) /* NDA_DST */
330 + nla_total_size(sizeof(__be16
)) /* NDA_PORT */
331 + nla_total_size(sizeof(__be32
)) /* NDA_VNI */
332 + nla_total_size(sizeof(__u32
)) /* NDA_IFINDEX */
333 + nla_total_size(sizeof(__s32
)) /* NDA_LINK_NETNSID */
334 + nla_total_size(sizeof(struct nda_cacheinfo
));
337 static void vxlan_fdb_notify(struct vxlan_dev
*vxlan
, struct vxlan_fdb
*fdb
,
338 struct vxlan_rdst
*rd
, int type
)
340 struct net
*net
= dev_net(vxlan
->dev
);
344 skb
= nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC
);
348 err
= vxlan_fdb_info(skb
, vxlan
, fdb
, 0, 0, type
, 0, rd
);
350 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
351 WARN_ON(err
== -EMSGSIZE
);
356 rtnl_notify(skb
, net
, 0, RTNLGRP_NEIGH
, NULL
, GFP_ATOMIC
);
360 rtnl_set_sk_err(net
, RTNLGRP_NEIGH
, err
);
363 static void vxlan_ip_miss(struct net_device
*dev
, union vxlan_addr
*ipa
)
365 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
366 struct vxlan_fdb f
= {
369 struct vxlan_rdst remote
= {
370 .remote_ip
= *ipa
, /* goes to NDA_DST */
371 .remote_vni
= cpu_to_be32(VXLAN_N_VID
),
374 vxlan_fdb_notify(vxlan
, &f
, &remote
, RTM_GETNEIGH
);
377 static void vxlan_fdb_miss(struct vxlan_dev
*vxlan
, const u8 eth_addr
[ETH_ALEN
])
379 struct vxlan_fdb f
= {
382 struct vxlan_rdst remote
= { };
384 memcpy(f
.eth_addr
, eth_addr
, ETH_ALEN
);
386 vxlan_fdb_notify(vxlan
, &f
, &remote
, RTM_GETNEIGH
);
389 /* Hash Ethernet address */
390 static u32
eth_hash(const unsigned char *addr
)
392 u64 value
= get_unaligned((u64
*)addr
);
394 /* only want 6 bytes */
400 return hash_64(value
, FDB_HASH_BITS
);
403 /* Hash chain to use given mac address */
404 static inline struct hlist_head
*vxlan_fdb_head(struct vxlan_dev
*vxlan
,
407 return &vxlan
->fdb_head
[eth_hash(mac
)];
410 /* Look up Ethernet address in forwarding table */
411 static struct vxlan_fdb
*__vxlan_find_mac(struct vxlan_dev
*vxlan
,
414 struct hlist_head
*head
= vxlan_fdb_head(vxlan
, mac
);
417 hlist_for_each_entry_rcu(f
, head
, hlist
) {
418 if (ether_addr_equal(mac
, f
->eth_addr
))
425 static struct vxlan_fdb
*vxlan_find_mac(struct vxlan_dev
*vxlan
,
430 f
= __vxlan_find_mac(vxlan
, mac
);
437 /* caller should hold vxlan->hash_lock */
438 static struct vxlan_rdst
*vxlan_fdb_find_rdst(struct vxlan_fdb
*f
,
439 union vxlan_addr
*ip
, __be16 port
,
440 __be32 vni
, __u32 ifindex
)
442 struct vxlan_rdst
*rd
;
444 list_for_each_entry(rd
, &f
->remotes
, list
) {
445 if (vxlan_addr_equal(&rd
->remote_ip
, ip
) &&
446 rd
->remote_port
== port
&&
447 rd
->remote_vni
== vni
&&
448 rd
->remote_ifindex
== ifindex
)
455 /* Replace destination of unicast mac */
456 static int vxlan_fdb_replace(struct vxlan_fdb
*f
,
457 union vxlan_addr
*ip
, __be16 port
, __be32 vni
,
460 struct vxlan_rdst
*rd
;
462 rd
= vxlan_fdb_find_rdst(f
, ip
, port
, vni
, ifindex
);
466 rd
= list_first_entry_or_null(&f
->remotes
, struct vxlan_rdst
, list
);
470 dst_cache_reset(&rd
->dst_cache
);
472 rd
->remote_port
= port
;
473 rd
->remote_vni
= vni
;
474 rd
->remote_ifindex
= ifindex
;
478 /* Add/update destinations for multicast */
479 static int vxlan_fdb_append(struct vxlan_fdb
*f
,
480 union vxlan_addr
*ip
, __be16 port
, __be32 vni
,
481 __u32 ifindex
, struct vxlan_rdst
**rdp
)
483 struct vxlan_rdst
*rd
;
485 rd
= vxlan_fdb_find_rdst(f
, ip
, port
, vni
, ifindex
);
489 rd
= kmalloc(sizeof(*rd
), GFP_ATOMIC
);
493 if (dst_cache_init(&rd
->dst_cache
, GFP_ATOMIC
)) {
499 rd
->remote_port
= port
;
500 rd
->remote_vni
= vni
;
501 rd
->remote_ifindex
= ifindex
;
503 list_add_tail_rcu(&rd
->list
, &f
->remotes
);
509 static struct vxlanhdr
*vxlan_gro_remcsum(struct sk_buff
*skb
,
511 struct vxlanhdr
*vh
, size_t hdrlen
,
513 struct gro_remcsum
*grc
,
516 size_t start
, offset
;
518 if (skb
->remcsum_offload
)
521 if (!NAPI_GRO_CB(skb
)->csum_valid
)
524 start
= vxlan_rco_start(vni_field
);
525 offset
= start
+ vxlan_rco_offset(vni_field
);
527 vh
= skb_gro_remcsum_process(skb
, (void *)vh
, off
, hdrlen
,
528 start
, offset
, grc
, nopartial
);
530 skb
->remcsum_offload
= 1;
535 static struct sk_buff
**vxlan_gro_receive(struct sock
*sk
,
536 struct sk_buff
**head
,
539 struct sk_buff
*p
, **pp
= NULL
;
540 struct vxlanhdr
*vh
, *vh2
;
541 unsigned int hlen
, off_vx
;
543 struct vxlan_sock
*vs
= rcu_dereference_sk_user_data(sk
);
545 struct gro_remcsum grc
;
547 skb_gro_remcsum_init(&grc
);
549 off_vx
= skb_gro_offset(skb
);
550 hlen
= off_vx
+ sizeof(*vh
);
551 vh
= skb_gro_header_fast(skb
, off_vx
);
552 if (skb_gro_header_hard(skb
, hlen
)) {
553 vh
= skb_gro_header_slow(skb
, hlen
, off_vx
);
558 skb_gro_postpull_rcsum(skb
, vh
, sizeof(struct vxlanhdr
));
560 flags
= vh
->vx_flags
;
562 if ((flags
& VXLAN_HF_RCO
) && (vs
->flags
& VXLAN_F_REMCSUM_RX
)) {
563 vh
= vxlan_gro_remcsum(skb
, off_vx
, vh
, sizeof(struct vxlanhdr
),
566 VXLAN_F_REMCSUM_NOPARTIAL
));
572 skb_gro_pull(skb
, sizeof(struct vxlanhdr
)); /* pull vxlan header */
574 for (p
= *head
; p
; p
= p
->next
) {
575 if (!NAPI_GRO_CB(p
)->same_flow
)
578 vh2
= (struct vxlanhdr
*)(p
->data
+ off_vx
);
579 if (vh
->vx_flags
!= vh2
->vx_flags
||
580 vh
->vx_vni
!= vh2
->vx_vni
) {
581 NAPI_GRO_CB(p
)->same_flow
= 0;
586 pp
= call_gro_receive(eth_gro_receive
, head
, skb
);
590 skb_gro_remcsum_cleanup(skb
, &grc
);
591 NAPI_GRO_CB(skb
)->flush
|= flush
;
596 static int vxlan_gro_complete(struct sock
*sk
, struct sk_buff
*skb
, int nhoff
)
598 /* Sets 'skb->inner_mac_header' since we are always called with
599 * 'skb->encapsulation' set.
601 return eth_gro_complete(skb
, nhoff
+ sizeof(struct vxlanhdr
));
604 /* Add new entry to forwarding table -- assumes lock held */
605 static int vxlan_fdb_create(struct vxlan_dev
*vxlan
,
606 const u8
*mac
, union vxlan_addr
*ip
,
607 __u16 state
, __u16 flags
,
608 __be16 port
, __be32 vni
, __u32 ifindex
,
611 struct vxlan_rdst
*rd
= NULL
;
616 f
= __vxlan_find_mac(vxlan
, mac
);
618 if (flags
& NLM_F_EXCL
) {
619 netdev_dbg(vxlan
->dev
,
620 "lost race to create %pM\n", mac
);
623 if (f
->state
!= state
) {
625 f
->updated
= jiffies
;
628 if (f
->flags
!= ndm_flags
) {
629 f
->flags
= ndm_flags
;
630 f
->updated
= jiffies
;
633 if ((flags
& NLM_F_REPLACE
)) {
634 /* Only change unicasts */
635 if (!(is_multicast_ether_addr(f
->eth_addr
) ||
636 is_zero_ether_addr(f
->eth_addr
))) {
637 notify
|= vxlan_fdb_replace(f
, ip
, port
, vni
,
642 if ((flags
& NLM_F_APPEND
) &&
643 (is_multicast_ether_addr(f
->eth_addr
) ||
644 is_zero_ether_addr(f
->eth_addr
))) {
645 rc
= vxlan_fdb_append(f
, ip
, port
, vni
, ifindex
, &rd
);
652 if (!(flags
& NLM_F_CREATE
))
655 if (vxlan
->cfg
.addrmax
&&
656 vxlan
->addrcnt
>= vxlan
->cfg
.addrmax
)
659 /* Disallow replace to add a multicast entry */
660 if ((flags
& NLM_F_REPLACE
) &&
661 (is_multicast_ether_addr(mac
) || is_zero_ether_addr(mac
)))
664 netdev_dbg(vxlan
->dev
, "add %pM -> %pIS\n", mac
, ip
);
665 f
= kmalloc(sizeof(*f
), GFP_ATOMIC
);
671 f
->flags
= ndm_flags
;
672 f
->updated
= f
->used
= jiffies
;
673 INIT_LIST_HEAD(&f
->remotes
);
674 memcpy(f
->eth_addr
, mac
, ETH_ALEN
);
676 rc
= vxlan_fdb_append(f
, ip
, port
, vni
, ifindex
, &rd
);
683 hlist_add_head_rcu(&f
->hlist
,
684 vxlan_fdb_head(vxlan
, mac
));
689 rd
= first_remote_rtnl(f
);
690 vxlan_fdb_notify(vxlan
, f
, rd
, RTM_NEWNEIGH
);
696 static void vxlan_fdb_free(struct rcu_head
*head
)
698 struct vxlan_fdb
*f
= container_of(head
, struct vxlan_fdb
, rcu
);
699 struct vxlan_rdst
*rd
, *nd
;
701 list_for_each_entry_safe(rd
, nd
, &f
->remotes
, list
) {
702 dst_cache_destroy(&rd
->dst_cache
);
708 static void vxlan_fdb_destroy(struct vxlan_dev
*vxlan
, struct vxlan_fdb
*f
)
710 netdev_dbg(vxlan
->dev
,
711 "delete %pM\n", f
->eth_addr
);
714 vxlan_fdb_notify(vxlan
, f
, first_remote_rtnl(f
), RTM_DELNEIGH
);
716 hlist_del_rcu(&f
->hlist
);
717 call_rcu(&f
->rcu
, vxlan_fdb_free
);
720 static int vxlan_fdb_parse(struct nlattr
*tb
[], struct vxlan_dev
*vxlan
,
721 union vxlan_addr
*ip
, __be16
*port
, __be32
*vni
,
724 struct net
*net
= dev_net(vxlan
->dev
);
728 err
= vxlan_nla_get_addr(ip
, tb
[NDA_DST
]);
732 union vxlan_addr
*remote
= &vxlan
->default_dst
.remote_ip
;
733 if (remote
->sa
.sa_family
== AF_INET
) {
734 ip
->sin
.sin_addr
.s_addr
= htonl(INADDR_ANY
);
735 ip
->sa
.sa_family
= AF_INET
;
736 #if IS_ENABLED(CONFIG_IPV6)
738 ip
->sin6
.sin6_addr
= in6addr_any
;
739 ip
->sa
.sa_family
= AF_INET6
;
745 if (nla_len(tb
[NDA_PORT
]) != sizeof(__be16
))
747 *port
= nla_get_be16(tb
[NDA_PORT
]);
749 *port
= vxlan
->cfg
.dst_port
;
753 if (nla_len(tb
[NDA_VNI
]) != sizeof(u32
))
755 *vni
= cpu_to_be32(nla_get_u32(tb
[NDA_VNI
]));
757 *vni
= vxlan
->default_dst
.remote_vni
;
760 if (tb
[NDA_IFINDEX
]) {
761 struct net_device
*tdev
;
763 if (nla_len(tb
[NDA_IFINDEX
]) != sizeof(u32
))
765 *ifindex
= nla_get_u32(tb
[NDA_IFINDEX
]);
766 tdev
= __dev_get_by_index(net
, *ifindex
);
768 return -EADDRNOTAVAIL
;
776 /* Add static entry (via netlink) */
777 static int vxlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
778 struct net_device
*dev
,
779 const unsigned char *addr
, u16 vid
, u16 flags
)
781 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
782 /* struct net *net = dev_net(vxlan->dev); */
789 if (!(ndm
->ndm_state
& (NUD_PERMANENT
|NUD_REACHABLE
))) {
790 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
795 if (tb
[NDA_DST
] == NULL
)
798 err
= vxlan_fdb_parse(tb
, vxlan
, &ip
, &port
, &vni
, &ifindex
);
802 if (vxlan
->default_dst
.remote_ip
.sa
.sa_family
!= ip
.sa
.sa_family
)
803 return -EAFNOSUPPORT
;
805 spin_lock_bh(&vxlan
->hash_lock
);
806 err
= vxlan_fdb_create(vxlan
, addr
, &ip
, ndm
->ndm_state
, flags
,
807 port
, vni
, ifindex
, ndm
->ndm_flags
);
808 spin_unlock_bh(&vxlan
->hash_lock
);
813 /* Delete entry (via netlink) */
814 static int vxlan_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
815 struct net_device
*dev
,
816 const unsigned char *addr
, u16 vid
)
818 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
820 struct vxlan_rdst
*rd
= NULL
;
827 err
= vxlan_fdb_parse(tb
, vxlan
, &ip
, &port
, &vni
, &ifindex
);
833 spin_lock_bh(&vxlan
->hash_lock
);
834 f
= vxlan_find_mac(vxlan
, addr
);
838 if (!vxlan_addr_any(&ip
)) {
839 rd
= vxlan_fdb_find_rdst(f
, &ip
, port
, vni
, ifindex
);
846 /* remove a destination if it's not the only one on the list,
847 * otherwise destroy the fdb entry
849 if (rd
&& !list_is_singular(&f
->remotes
)) {
850 list_del_rcu(&rd
->list
);
851 vxlan_fdb_notify(vxlan
, f
, rd
, RTM_DELNEIGH
);
856 vxlan_fdb_destroy(vxlan
, f
);
859 spin_unlock_bh(&vxlan
->hash_lock
);
864 /* Dump forwarding table */
865 static int vxlan_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
866 struct net_device
*dev
,
867 struct net_device
*filter_dev
, int *idx
)
869 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
873 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
876 hlist_for_each_entry_rcu(f
, &vxlan
->fdb_head
[h
], hlist
) {
877 struct vxlan_rdst
*rd
;
879 list_for_each_entry_rcu(rd
, &f
->remotes
, list
) {
880 if (*idx
< cb
->args
[2])
883 err
= vxlan_fdb_info(skb
, vxlan
, f
,
884 NETLINK_CB(cb
->skb
).portid
,
899 /* Watch incoming packets to learn mapping between Ethernet address
900 * and Tunnel endpoint.
901 * Return true if packet is bogus and should be dropped.
903 static bool vxlan_snoop(struct net_device
*dev
,
904 union vxlan_addr
*src_ip
, const u8
*src_mac
)
906 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
909 f
= vxlan_find_mac(vxlan
, src_mac
);
911 struct vxlan_rdst
*rdst
= first_remote_rcu(f
);
913 if (likely(vxlan_addr_equal(&rdst
->remote_ip
, src_ip
)))
916 /* Don't migrate static entries, drop packets */
917 if (f
->state
& NUD_NOARP
)
922 "%pM migrated from %pIS to %pIS\n",
923 src_mac
, &rdst
->remote_ip
.sa
, &src_ip
->sa
);
925 rdst
->remote_ip
= *src_ip
;
926 f
->updated
= jiffies
;
927 vxlan_fdb_notify(vxlan
, f
, rdst
, RTM_NEWNEIGH
);
929 /* learned new entry */
930 spin_lock(&vxlan
->hash_lock
);
932 /* close off race between vxlan_flush and incoming packets */
933 if (netif_running(dev
))
934 vxlan_fdb_create(vxlan
, src_mac
, src_ip
,
936 NLM_F_EXCL
|NLM_F_CREATE
,
938 vxlan
->default_dst
.remote_vni
,
940 spin_unlock(&vxlan
->hash_lock
);
946 /* See if multicast group is already in use by other ID */
947 static bool vxlan_group_used(struct vxlan_net
*vn
, struct vxlan_dev
*dev
)
949 struct vxlan_dev
*vxlan
;
950 struct vxlan_sock
*sock4
;
951 #if IS_ENABLED(CONFIG_IPV6)
952 struct vxlan_sock
*sock6
;
954 unsigned short family
= dev
->default_dst
.remote_ip
.sa
.sa_family
;
956 sock4
= rtnl_dereference(dev
->vn4_sock
);
958 /* The vxlan_sock is only used by dev, leaving group has
959 * no effect on other vxlan devices.
961 if (family
== AF_INET
&& sock4
&& atomic_read(&sock4
->refcnt
) == 1)
963 #if IS_ENABLED(CONFIG_IPV6)
964 sock6
= rtnl_dereference(dev
->vn6_sock
);
965 if (family
== AF_INET6
&& sock6
&& atomic_read(&sock6
->refcnt
) == 1)
969 list_for_each_entry(vxlan
, &vn
->vxlan_list
, next
) {
970 if (!netif_running(vxlan
->dev
) || vxlan
== dev
)
973 if (family
== AF_INET
&&
974 rtnl_dereference(vxlan
->vn4_sock
) != sock4
)
976 #if IS_ENABLED(CONFIG_IPV6)
977 if (family
== AF_INET6
&&
978 rtnl_dereference(vxlan
->vn6_sock
) != sock6
)
982 if (!vxlan_addr_equal(&vxlan
->default_dst
.remote_ip
,
983 &dev
->default_dst
.remote_ip
))
986 if (vxlan
->default_dst
.remote_ifindex
!=
987 dev
->default_dst
.remote_ifindex
)
996 static bool __vxlan_sock_release_prep(struct vxlan_sock
*vs
)
998 struct vxlan_net
*vn
;
1002 if (!atomic_dec_and_test(&vs
->refcnt
))
1005 vn
= net_generic(sock_net(vs
->sock
->sk
), vxlan_net_id
);
1006 spin_lock(&vn
->sock_lock
);
1007 hlist_del_rcu(&vs
->hlist
);
1008 udp_tunnel_notify_del_rx_port(vs
->sock
,
1009 (vs
->flags
& VXLAN_F_GPE
) ?
1010 UDP_TUNNEL_TYPE_VXLAN_GPE
:
1011 UDP_TUNNEL_TYPE_VXLAN
);
1012 spin_unlock(&vn
->sock_lock
);
1017 static void vxlan_sock_release(struct vxlan_dev
*vxlan
)
1019 struct vxlan_sock
*sock4
= rtnl_dereference(vxlan
->vn4_sock
);
1020 #if IS_ENABLED(CONFIG_IPV6)
1021 struct vxlan_sock
*sock6
= rtnl_dereference(vxlan
->vn6_sock
);
1023 rcu_assign_pointer(vxlan
->vn6_sock
, NULL
);
1026 rcu_assign_pointer(vxlan
->vn4_sock
, NULL
);
1029 if (__vxlan_sock_release_prep(sock4
)) {
1030 udp_tunnel_sock_release(sock4
->sock
);
1034 #if IS_ENABLED(CONFIG_IPV6)
1035 if (__vxlan_sock_release_prep(sock6
)) {
1036 udp_tunnel_sock_release(sock6
->sock
);
1042 /* Update multicast group membership when first VNI on
1043 * multicast address is brought up
1045 static int vxlan_igmp_join(struct vxlan_dev
*vxlan
)
1048 union vxlan_addr
*ip
= &vxlan
->default_dst
.remote_ip
;
1049 int ifindex
= vxlan
->default_dst
.remote_ifindex
;
1052 if (ip
->sa
.sa_family
== AF_INET
) {
1053 struct vxlan_sock
*sock4
= rtnl_dereference(vxlan
->vn4_sock
);
1054 struct ip_mreqn mreq
= {
1055 .imr_multiaddr
.s_addr
= ip
->sin
.sin_addr
.s_addr
,
1056 .imr_ifindex
= ifindex
,
1059 sk
= sock4
->sock
->sk
;
1061 ret
= ip_mc_join_group(sk
, &mreq
);
1063 #if IS_ENABLED(CONFIG_IPV6)
1065 struct vxlan_sock
*sock6
= rtnl_dereference(vxlan
->vn6_sock
);
1067 sk
= sock6
->sock
->sk
;
1069 ret
= ipv6_stub
->ipv6_sock_mc_join(sk
, ifindex
,
1070 &ip
->sin6
.sin6_addr
);
1078 /* Inverse of vxlan_igmp_join when last VNI is brought down */
1079 static int vxlan_igmp_leave(struct vxlan_dev
*vxlan
)
1082 union vxlan_addr
*ip
= &vxlan
->default_dst
.remote_ip
;
1083 int ifindex
= vxlan
->default_dst
.remote_ifindex
;
1086 if (ip
->sa
.sa_family
== AF_INET
) {
1087 struct vxlan_sock
*sock4
= rtnl_dereference(vxlan
->vn4_sock
);
1088 struct ip_mreqn mreq
= {
1089 .imr_multiaddr
.s_addr
= ip
->sin
.sin_addr
.s_addr
,
1090 .imr_ifindex
= ifindex
,
1093 sk
= sock4
->sock
->sk
;
1095 ret
= ip_mc_leave_group(sk
, &mreq
);
1097 #if IS_ENABLED(CONFIG_IPV6)
1099 struct vxlan_sock
*sock6
= rtnl_dereference(vxlan
->vn6_sock
);
1101 sk
= sock6
->sock
->sk
;
1103 ret
= ipv6_stub
->ipv6_sock_mc_drop(sk
, ifindex
,
1104 &ip
->sin6
.sin6_addr
);
1112 static bool vxlan_remcsum(struct vxlanhdr
*unparsed
,
1113 struct sk_buff
*skb
, u32 vxflags
)
1115 size_t start
, offset
;
1117 if (!(unparsed
->vx_flags
& VXLAN_HF_RCO
) || skb
->remcsum_offload
)
1120 start
= vxlan_rco_start(unparsed
->vx_vni
);
1121 offset
= start
+ vxlan_rco_offset(unparsed
->vx_vni
);
1123 if (!pskb_may_pull(skb
, offset
+ sizeof(u16
)))
1126 skb_remcsum_process(skb
, (void *)(vxlan_hdr(skb
) + 1), start
, offset
,
1127 !!(vxflags
& VXLAN_F_REMCSUM_NOPARTIAL
));
1129 unparsed
->vx_flags
&= ~VXLAN_HF_RCO
;
1130 unparsed
->vx_vni
&= VXLAN_VNI_MASK
;
1134 static void vxlan_parse_gbp_hdr(struct vxlanhdr
*unparsed
,
1135 struct sk_buff
*skb
, u32 vxflags
,
1136 struct vxlan_metadata
*md
)
1138 struct vxlanhdr_gbp
*gbp
= (struct vxlanhdr_gbp
*)unparsed
;
1139 struct metadata_dst
*tun_dst
;
1141 if (!(unparsed
->vx_flags
& VXLAN_HF_GBP
))
1144 md
->gbp
= ntohs(gbp
->policy_id
);
1146 tun_dst
= (struct metadata_dst
*)skb_dst(skb
);
1148 tun_dst
->u
.tun_info
.key
.tun_flags
|= TUNNEL_VXLAN_OPT
;
1149 tun_dst
->u
.tun_info
.options_len
= sizeof(*md
);
1151 if (gbp
->dont_learn
)
1152 md
->gbp
|= VXLAN_GBP_DONT_LEARN
;
1154 if (gbp
->policy_applied
)
1155 md
->gbp
|= VXLAN_GBP_POLICY_APPLIED
;
1157 /* In flow-based mode, GBP is carried in dst_metadata */
1158 if (!(vxflags
& VXLAN_F_COLLECT_METADATA
))
1159 skb
->mark
= md
->gbp
;
1161 unparsed
->vx_flags
&= ~VXLAN_GBP_USED_BITS
;
1164 static bool vxlan_parse_gpe_hdr(struct vxlanhdr
*unparsed
,
1166 struct sk_buff
*skb
, u32 vxflags
)
1168 struct vxlanhdr_gpe
*gpe
= (struct vxlanhdr_gpe
*)unparsed
;
1170 /* Need to have Next Protocol set for interfaces in GPE mode. */
1171 if (!gpe
->np_applied
)
1173 /* "The initial version is 0. If a receiver does not support the
1174 * version indicated it MUST drop the packet.
1176 if (gpe
->version
!= 0)
1178 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1179 * processing MUST occur." However, we don't implement OAM
1180 * processing, thus drop the packet.
1185 switch (gpe
->next_protocol
) {
1186 case VXLAN_GPE_NP_IPV4
:
1187 *protocol
= htons(ETH_P_IP
);
1189 case VXLAN_GPE_NP_IPV6
:
1190 *protocol
= htons(ETH_P_IPV6
);
1192 case VXLAN_GPE_NP_ETHERNET
:
1193 *protocol
= htons(ETH_P_TEB
);
1199 unparsed
->vx_flags
&= ~VXLAN_GPE_USED_BITS
;
1203 static bool vxlan_set_mac(struct vxlan_dev
*vxlan
,
1204 struct vxlan_sock
*vs
,
1205 struct sk_buff
*skb
)
1207 union vxlan_addr saddr
;
1209 skb_reset_mac_header(skb
);
1210 skb
->protocol
= eth_type_trans(skb
, vxlan
->dev
);
1211 skb_postpull_rcsum(skb
, eth_hdr(skb
), ETH_HLEN
);
1213 /* Ignore packet loops (and multicast echo) */
1214 if (ether_addr_equal(eth_hdr(skb
)->h_source
, vxlan
->dev
->dev_addr
))
1217 /* Get address from the outer IP header */
1218 if (vxlan_get_sk_family(vs
) == AF_INET
) {
1219 saddr
.sin
.sin_addr
.s_addr
= ip_hdr(skb
)->saddr
;
1220 saddr
.sa
.sa_family
= AF_INET
;
1221 #if IS_ENABLED(CONFIG_IPV6)
1223 saddr
.sin6
.sin6_addr
= ipv6_hdr(skb
)->saddr
;
1224 saddr
.sa
.sa_family
= AF_INET6
;
1228 if ((vxlan
->flags
& VXLAN_F_LEARN
) &&
1229 vxlan_snoop(skb
->dev
, &saddr
, eth_hdr(skb
)->h_source
))
1235 static bool vxlan_ecn_decapsulate(struct vxlan_sock
*vs
, void *oiph
,
1236 struct sk_buff
*skb
)
1240 if (vxlan_get_sk_family(vs
) == AF_INET
)
1241 err
= IP_ECN_decapsulate(oiph
, skb
);
1242 #if IS_ENABLED(CONFIG_IPV6)
1244 err
= IP6_ECN_decapsulate(oiph
, skb
);
1247 if (unlikely(err
) && log_ecn_error
) {
1248 if (vxlan_get_sk_family(vs
) == AF_INET
)
1249 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1250 &((struct iphdr
*)oiph
)->saddr
,
1251 ((struct iphdr
*)oiph
)->tos
);
1253 net_info_ratelimited("non-ECT from %pI6\n",
1254 &((struct ipv6hdr
*)oiph
)->saddr
);
1259 /* Callback from net/ipv4/udp.c to receive packets */
1260 static int vxlan_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1262 struct pcpu_sw_netstats
*stats
;
1263 struct vxlan_dev
*vxlan
;
1264 struct vxlan_sock
*vs
;
1265 struct vxlanhdr unparsed
;
1266 struct vxlan_metadata _md
;
1267 struct vxlan_metadata
*md
= &_md
;
1268 __be16 protocol
= htons(ETH_P_TEB
);
1269 bool raw_proto
= false;
1272 /* Need UDP and VXLAN header to be present */
1273 if (!pskb_may_pull(skb
, VXLAN_HLEN
))
1276 unparsed
= *vxlan_hdr(skb
);
1277 /* VNI flag always required to be set */
1278 if (!(unparsed
.vx_flags
& VXLAN_HF_VNI
)) {
1279 netdev_dbg(skb
->dev
, "invalid vxlan flags=%#x vni=%#x\n",
1280 ntohl(vxlan_hdr(skb
)->vx_flags
),
1281 ntohl(vxlan_hdr(skb
)->vx_vni
));
1282 /* Return non vxlan pkt */
1285 unparsed
.vx_flags
&= ~VXLAN_HF_VNI
;
1286 unparsed
.vx_vni
&= ~VXLAN_VNI_MASK
;
1288 vs
= rcu_dereference_sk_user_data(sk
);
1292 vxlan
= vxlan_vs_find_vni(vs
, vxlan_vni(vxlan_hdr(skb
)->vx_vni
));
1296 /* For backwards compatibility, only allow reserved fields to be
1297 * used by VXLAN extensions if explicitly requested.
1299 if (vs
->flags
& VXLAN_F_GPE
) {
1300 if (!vxlan_parse_gpe_hdr(&unparsed
, &protocol
, skb
, vs
->flags
))
1305 if (__iptunnel_pull_header(skb
, VXLAN_HLEN
, protocol
, raw_proto
,
1306 !net_eq(vxlan
->net
, dev_net(vxlan
->dev
))))
1309 if (vxlan_collect_metadata(vs
)) {
1310 __be32 vni
= vxlan_vni(vxlan_hdr(skb
)->vx_vni
);
1311 struct metadata_dst
*tun_dst
;
1313 tun_dst
= udp_tun_rx_dst(skb
, vxlan_get_sk_family(vs
), TUNNEL_KEY
,
1314 key32_to_tunnel_id(vni
), sizeof(*md
));
1319 md
= ip_tunnel_info_opts(&tun_dst
->u
.tun_info
);
1321 skb_dst_set(skb
, (struct dst_entry
*)tun_dst
);
1323 memset(md
, 0, sizeof(*md
));
1326 if (vs
->flags
& VXLAN_F_REMCSUM_RX
)
1327 if (!vxlan_remcsum(&unparsed
, skb
, vs
->flags
))
1329 if (vs
->flags
& VXLAN_F_GBP
)
1330 vxlan_parse_gbp_hdr(&unparsed
, skb
, vs
->flags
, md
);
1331 /* Note that GBP and GPE can never be active together. This is
1332 * ensured in vxlan_dev_configure.
1335 if (unparsed
.vx_flags
|| unparsed
.vx_vni
) {
1336 /* If there are any unprocessed flags remaining treat
1337 * this as a malformed packet. This behavior diverges from
1338 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1339 * in reserved fields are to be ignored. The approach here
1340 * maintains compatibility with previous stack code, and also
1341 * is more robust and provides a little more security in
1342 * adding extensions to VXLAN.
1348 if (!vxlan_set_mac(vxlan
, vs
, skb
))
1351 skb_reset_mac_header(skb
);
1352 skb
->dev
= vxlan
->dev
;
1353 skb
->pkt_type
= PACKET_HOST
;
1356 oiph
= skb_network_header(skb
);
1357 skb_reset_network_header(skb
);
1359 if (!vxlan_ecn_decapsulate(vs
, oiph
, skb
)) {
1360 ++vxlan
->dev
->stats
.rx_frame_errors
;
1361 ++vxlan
->dev
->stats
.rx_errors
;
1365 stats
= this_cpu_ptr(vxlan
->dev
->tstats
);
1366 u64_stats_update_begin(&stats
->syncp
);
1367 stats
->rx_packets
++;
1368 stats
->rx_bytes
+= skb
->len
;
1369 u64_stats_update_end(&stats
->syncp
);
1371 gro_cells_receive(&vxlan
->gro_cells
, skb
);
1375 /* Consume bad packet */
1380 static int arp_reduce(struct net_device
*dev
, struct sk_buff
*skb
)
1382 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1383 struct arphdr
*parp
;
1386 struct neighbour
*n
;
1388 if (dev
->flags
& IFF_NOARP
)
1391 if (!pskb_may_pull(skb
, arp_hdr_len(dev
))) {
1392 dev
->stats
.tx_dropped
++;
1395 parp
= arp_hdr(skb
);
1397 if ((parp
->ar_hrd
!= htons(ARPHRD_ETHER
) &&
1398 parp
->ar_hrd
!= htons(ARPHRD_IEEE802
)) ||
1399 parp
->ar_pro
!= htons(ETH_P_IP
) ||
1400 parp
->ar_op
!= htons(ARPOP_REQUEST
) ||
1401 parp
->ar_hln
!= dev
->addr_len
||
1404 arpptr
= (u8
*)parp
+ sizeof(struct arphdr
);
1406 arpptr
+= dev
->addr_len
; /* sha */
1407 memcpy(&sip
, arpptr
, sizeof(sip
));
1408 arpptr
+= sizeof(sip
);
1409 arpptr
+= dev
->addr_len
; /* tha */
1410 memcpy(&tip
, arpptr
, sizeof(tip
));
1412 if (ipv4_is_loopback(tip
) ||
1413 ipv4_is_multicast(tip
))
1416 n
= neigh_lookup(&arp_tbl
, &tip
, dev
);
1419 struct vxlan_fdb
*f
;
1420 struct sk_buff
*reply
;
1422 if (!(n
->nud_state
& NUD_CONNECTED
)) {
1427 f
= vxlan_find_mac(vxlan
, n
->ha
);
1428 if (f
&& vxlan_addr_any(&(first_remote_rcu(f
)->remote_ip
))) {
1429 /* bridge-local neighbor */
1434 reply
= arp_create(ARPOP_REPLY
, ETH_P_ARP
, sip
, dev
, tip
, sha
,
1442 skb_reset_mac_header(reply
);
1443 __skb_pull(reply
, skb_network_offset(reply
));
1444 reply
->ip_summed
= CHECKSUM_UNNECESSARY
;
1445 reply
->pkt_type
= PACKET_HOST
;
1447 if (netif_rx_ni(reply
) == NET_RX_DROP
)
1448 dev
->stats
.rx_dropped
++;
1449 } else if (vxlan
->flags
& VXLAN_F_L3MISS
) {
1450 union vxlan_addr ipa
= {
1451 .sin
.sin_addr
.s_addr
= tip
,
1452 .sin
.sin_family
= AF_INET
,
1455 vxlan_ip_miss(dev
, &ipa
);
1459 return NETDEV_TX_OK
;
1462 #if IS_ENABLED(CONFIG_IPV6)
1463 static struct sk_buff
*vxlan_na_create(struct sk_buff
*request
,
1464 struct neighbour
*n
, bool isrouter
)
1466 struct net_device
*dev
= request
->dev
;
1467 struct sk_buff
*reply
;
1468 struct nd_msg
*ns
, *na
;
1469 struct ipv6hdr
*pip6
;
1471 int na_olen
= 8; /* opt hdr + ETH_ALEN for target */
1478 len
= LL_RESERVED_SPACE(dev
) + sizeof(struct ipv6hdr
) +
1479 sizeof(*na
) + na_olen
+ dev
->needed_tailroom
;
1480 reply
= alloc_skb(len
, GFP_ATOMIC
);
1484 reply
->protocol
= htons(ETH_P_IPV6
);
1486 skb_reserve(reply
, LL_RESERVED_SPACE(request
->dev
));
1487 skb_push(reply
, sizeof(struct ethhdr
));
1488 skb_reset_mac_header(reply
);
1490 ns
= (struct nd_msg
*)skb_transport_header(request
);
1492 daddr
= eth_hdr(request
)->h_source
;
1493 ns_olen
= request
->len
- skb_transport_offset(request
) - sizeof(*ns
);
1494 for (i
= 0; i
< ns_olen
-1; i
+= (ns
->opt
[i
+1]<<3)) {
1495 if (ns
->opt
[i
] == ND_OPT_SOURCE_LL_ADDR
) {
1496 daddr
= ns
->opt
+ i
+ sizeof(struct nd_opt_hdr
);
1501 /* Ethernet header */
1502 ether_addr_copy(eth_hdr(reply
)->h_dest
, daddr
);
1503 ether_addr_copy(eth_hdr(reply
)->h_source
, n
->ha
);
1504 eth_hdr(reply
)->h_proto
= htons(ETH_P_IPV6
);
1505 reply
->protocol
= htons(ETH_P_IPV6
);
1507 skb_pull(reply
, sizeof(struct ethhdr
));
1508 skb_reset_network_header(reply
);
1509 skb_put(reply
, sizeof(struct ipv6hdr
));
1513 pip6
= ipv6_hdr(reply
);
1514 memset(pip6
, 0, sizeof(struct ipv6hdr
));
1516 pip6
->priority
= ipv6_hdr(request
)->priority
;
1517 pip6
->nexthdr
= IPPROTO_ICMPV6
;
1518 pip6
->hop_limit
= 255;
1519 pip6
->daddr
= ipv6_hdr(request
)->saddr
;
1520 pip6
->saddr
= *(struct in6_addr
*)n
->primary_key
;
1522 skb_pull(reply
, sizeof(struct ipv6hdr
));
1523 skb_reset_transport_header(reply
);
1525 na
= (struct nd_msg
*)skb_put(reply
, sizeof(*na
) + na_olen
);
1527 /* Neighbor Advertisement */
1528 memset(na
, 0, sizeof(*na
)+na_olen
);
1529 na
->icmph
.icmp6_type
= NDISC_NEIGHBOUR_ADVERTISEMENT
;
1530 na
->icmph
.icmp6_router
= isrouter
;
1531 na
->icmph
.icmp6_override
= 1;
1532 na
->icmph
.icmp6_solicited
= 1;
1533 na
->target
= ns
->target
;
1534 ether_addr_copy(&na
->opt
[2], n
->ha
);
1535 na
->opt
[0] = ND_OPT_TARGET_LL_ADDR
;
1536 na
->opt
[1] = na_olen
>> 3;
1538 na
->icmph
.icmp6_cksum
= csum_ipv6_magic(&pip6
->saddr
,
1539 &pip6
->daddr
, sizeof(*na
)+na_olen
, IPPROTO_ICMPV6
,
1540 csum_partial(na
, sizeof(*na
)+na_olen
, 0));
1542 pip6
->payload_len
= htons(sizeof(*na
)+na_olen
);
1544 skb_push(reply
, sizeof(struct ipv6hdr
));
1546 reply
->ip_summed
= CHECKSUM_UNNECESSARY
;
1551 static int neigh_reduce(struct net_device
*dev
, struct sk_buff
*skb
)
1553 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1555 const struct ipv6hdr
*iphdr
;
1556 const struct in6_addr
*saddr
, *daddr
;
1557 struct neighbour
*n
;
1558 struct inet6_dev
*in6_dev
;
1560 in6_dev
= __in6_dev_get(dev
);
1564 iphdr
= ipv6_hdr(skb
);
1565 saddr
= &iphdr
->saddr
;
1566 daddr
= &iphdr
->daddr
;
1568 msg
= (struct nd_msg
*)skb_transport_header(skb
);
1569 if (msg
->icmph
.icmp6_code
!= 0 ||
1570 msg
->icmph
.icmp6_type
!= NDISC_NEIGHBOUR_SOLICITATION
)
1573 if (ipv6_addr_loopback(daddr
) ||
1574 ipv6_addr_is_multicast(&msg
->target
))
1577 n
= neigh_lookup(ipv6_stub
->nd_tbl
, &msg
->target
, dev
);
1580 struct vxlan_fdb
*f
;
1581 struct sk_buff
*reply
;
1583 if (!(n
->nud_state
& NUD_CONNECTED
)) {
1588 f
= vxlan_find_mac(vxlan
, n
->ha
);
1589 if (f
&& vxlan_addr_any(&(first_remote_rcu(f
)->remote_ip
))) {
1590 /* bridge-local neighbor */
1595 reply
= vxlan_na_create(skb
, n
,
1596 !!(f
? f
->flags
& NTF_ROUTER
: 0));
1603 if (netif_rx_ni(reply
) == NET_RX_DROP
)
1604 dev
->stats
.rx_dropped
++;
1606 } else if (vxlan
->flags
& VXLAN_F_L3MISS
) {
1607 union vxlan_addr ipa
= {
1608 .sin6
.sin6_addr
= msg
->target
,
1609 .sin6
.sin6_family
= AF_INET6
,
1612 vxlan_ip_miss(dev
, &ipa
);
1617 return NETDEV_TX_OK
;
1621 static bool route_shortcircuit(struct net_device
*dev
, struct sk_buff
*skb
)
1623 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1624 struct neighbour
*n
;
1626 if (is_multicast_ether_addr(eth_hdr(skb
)->h_dest
))
1630 switch (ntohs(eth_hdr(skb
)->h_proto
)) {
1635 if (!pskb_may_pull(skb
, sizeof(struct iphdr
)))
1638 n
= neigh_lookup(&arp_tbl
, &pip
->daddr
, dev
);
1639 if (!n
&& (vxlan
->flags
& VXLAN_F_L3MISS
)) {
1640 union vxlan_addr ipa
= {
1641 .sin
.sin_addr
.s_addr
= pip
->daddr
,
1642 .sin
.sin_family
= AF_INET
,
1645 vxlan_ip_miss(dev
, &ipa
);
1651 #if IS_ENABLED(CONFIG_IPV6)
1654 struct ipv6hdr
*pip6
;
1656 if (!pskb_may_pull(skb
, sizeof(struct ipv6hdr
)))
1658 pip6
= ipv6_hdr(skb
);
1659 n
= neigh_lookup(ipv6_stub
->nd_tbl
, &pip6
->daddr
, dev
);
1660 if (!n
&& (vxlan
->flags
& VXLAN_F_L3MISS
)) {
1661 union vxlan_addr ipa
= {
1662 .sin6
.sin6_addr
= pip6
->daddr
,
1663 .sin6
.sin6_family
= AF_INET6
,
1666 vxlan_ip_miss(dev
, &ipa
);
1680 diff
= !ether_addr_equal(eth_hdr(skb
)->h_dest
, n
->ha
);
1682 memcpy(eth_hdr(skb
)->h_source
, eth_hdr(skb
)->h_dest
,
1684 memcpy(eth_hdr(skb
)->h_dest
, n
->ha
, dev
->addr_len
);
1693 static void vxlan_build_gbp_hdr(struct vxlanhdr
*vxh
, u32 vxflags
,
1694 struct vxlan_metadata
*md
)
1696 struct vxlanhdr_gbp
*gbp
;
1701 gbp
= (struct vxlanhdr_gbp
*)vxh
;
1702 vxh
->vx_flags
|= VXLAN_HF_GBP
;
1704 if (md
->gbp
& VXLAN_GBP_DONT_LEARN
)
1705 gbp
->dont_learn
= 1;
1707 if (md
->gbp
& VXLAN_GBP_POLICY_APPLIED
)
1708 gbp
->policy_applied
= 1;
1710 gbp
->policy_id
= htons(md
->gbp
& VXLAN_GBP_ID_MASK
);
1713 static int vxlan_build_gpe_hdr(struct vxlanhdr
*vxh
, u32 vxflags
,
1716 struct vxlanhdr_gpe
*gpe
= (struct vxlanhdr_gpe
*)vxh
;
1718 gpe
->np_applied
= 1;
1721 case htons(ETH_P_IP
):
1722 gpe
->next_protocol
= VXLAN_GPE_NP_IPV4
;
1724 case htons(ETH_P_IPV6
):
1725 gpe
->next_protocol
= VXLAN_GPE_NP_IPV6
;
1727 case htons(ETH_P_TEB
):
1728 gpe
->next_protocol
= VXLAN_GPE_NP_ETHERNET
;
1731 return -EPFNOSUPPORT
;
1734 static int vxlan_build_skb(struct sk_buff
*skb
, struct dst_entry
*dst
,
1735 int iphdr_len
, __be32 vni
,
1736 struct vxlan_metadata
*md
, u32 vxflags
,
1739 struct vxlanhdr
*vxh
;
1742 int type
= udp_sum
? SKB_GSO_UDP_TUNNEL_CSUM
: SKB_GSO_UDP_TUNNEL
;
1743 __be16 inner_protocol
= htons(ETH_P_TEB
);
1745 if ((vxflags
& VXLAN_F_REMCSUM_TX
) &&
1746 skb
->ip_summed
== CHECKSUM_PARTIAL
) {
1747 int csum_start
= skb_checksum_start_offset(skb
);
1749 if (csum_start
<= VXLAN_MAX_REMCSUM_START
&&
1750 !(csum_start
& VXLAN_RCO_SHIFT_MASK
) &&
1751 (skb
->csum_offset
== offsetof(struct udphdr
, check
) ||
1752 skb
->csum_offset
== offsetof(struct tcphdr
, check
)))
1753 type
|= SKB_GSO_TUNNEL_REMCSUM
;
1756 min_headroom
= LL_RESERVED_SPACE(dst
->dev
) + dst
->header_len
1757 + VXLAN_HLEN
+ iphdr_len
;
1759 /* Need space for new headers (invalidates iph ptr) */
1760 err
= skb_cow_head(skb
, min_headroom
);
1764 err
= iptunnel_handle_offloads(skb
, type
);
1768 vxh
= (struct vxlanhdr
*) __skb_push(skb
, sizeof(*vxh
));
1769 vxh
->vx_flags
= VXLAN_HF_VNI
;
1770 vxh
->vx_vni
= vxlan_vni_field(vni
);
1772 if (type
& SKB_GSO_TUNNEL_REMCSUM
) {
1775 start
= skb_checksum_start_offset(skb
) - sizeof(struct vxlanhdr
);
1776 vxh
->vx_vni
|= vxlan_compute_rco(start
, skb
->csum_offset
);
1777 vxh
->vx_flags
|= VXLAN_HF_RCO
;
1779 if (!skb_is_gso(skb
)) {
1780 skb
->ip_summed
= CHECKSUM_NONE
;
1781 skb
->encapsulation
= 0;
1785 if (vxflags
& VXLAN_F_GBP
)
1786 vxlan_build_gbp_hdr(vxh
, vxflags
, md
);
1787 if (vxflags
& VXLAN_F_GPE
) {
1788 err
= vxlan_build_gpe_hdr(vxh
, vxflags
, skb
->protocol
);
1791 inner_protocol
= skb
->protocol
;
1794 skb_set_inner_protocol(skb
, inner_protocol
);
1798 static struct rtable
*vxlan_get_route(struct vxlan_dev
*vxlan
, struct net_device
*dev
,
1799 struct vxlan_sock
*sock4
,
1800 struct sk_buff
*skb
, int oif
, u8 tos
,
1801 __be32 daddr
, __be32
*saddr
,
1802 struct dst_cache
*dst_cache
,
1803 const struct ip_tunnel_info
*info
)
1805 bool use_cache
= ip_tunnel_dst_cache_usable(skb
, info
);
1806 struct rtable
*rt
= NULL
;
1810 return ERR_PTR(-EIO
);
1815 rt
= dst_cache_get_ip4(dst_cache
, saddr
);
1820 memset(&fl4
, 0, sizeof(fl4
));
1821 fl4
.flowi4_oif
= oif
;
1822 fl4
.flowi4_tos
= RT_TOS(tos
);
1823 fl4
.flowi4_mark
= skb
->mark
;
1824 fl4
.flowi4_proto
= IPPROTO_UDP
;
1828 rt
= ip_route_output_key(vxlan
->net
, &fl4
);
1829 if (likely(!IS_ERR(rt
))) {
1830 if (rt
->dst
.dev
== dev
) {
1831 netdev_dbg(dev
, "circular route to %pI4\n", &daddr
);
1833 return ERR_PTR(-ELOOP
);
1838 dst_cache_set_ip4(dst_cache
, &rt
->dst
, fl4
.saddr
);
1840 netdev_dbg(dev
, "no route to %pI4\n", &daddr
);
1841 return ERR_PTR(-ENETUNREACH
);
1846 #if IS_ENABLED(CONFIG_IPV6)
1847 static struct dst_entry
*vxlan6_get_route(struct vxlan_dev
*vxlan
,
1848 struct net_device
*dev
,
1849 struct vxlan_sock
*sock6
,
1850 struct sk_buff
*skb
, int oif
, u8 tos
,
1852 const struct in6_addr
*daddr
,
1853 struct in6_addr
*saddr
,
1854 struct dst_cache
*dst_cache
,
1855 const struct ip_tunnel_info
*info
)
1857 bool use_cache
= ip_tunnel_dst_cache_usable(skb
, info
);
1858 struct dst_entry
*ndst
;
1863 return ERR_PTR(-EIO
);
1868 ndst
= dst_cache_get_ip6(dst_cache
, saddr
);
1873 memset(&fl6
, 0, sizeof(fl6
));
1874 fl6
.flowi6_oif
= oif
;
1877 fl6
.flowlabel
= ip6_make_flowinfo(RT_TOS(tos
), label
);
1878 fl6
.flowi6_mark
= skb
->mark
;
1879 fl6
.flowi6_proto
= IPPROTO_UDP
;
1881 err
= ipv6_stub
->ipv6_dst_lookup(vxlan
->net
,
1884 if (unlikely(err
< 0)) {
1885 netdev_dbg(dev
, "no route to %pI6\n", daddr
);
1886 return ERR_PTR(-ENETUNREACH
);
1889 if (unlikely(ndst
->dev
== dev
)) {
1890 netdev_dbg(dev
, "circular route to %pI6\n", daddr
);
1892 return ERR_PTR(-ELOOP
);
1897 dst_cache_set_ip6(dst_cache
, ndst
, saddr
);
1902 /* Bypass encapsulation if the destination is local */
1903 static void vxlan_encap_bypass(struct sk_buff
*skb
, struct vxlan_dev
*src_vxlan
,
1904 struct vxlan_dev
*dst_vxlan
)
1906 struct pcpu_sw_netstats
*tx_stats
, *rx_stats
;
1907 union vxlan_addr loopback
;
1908 union vxlan_addr
*remote_ip
= &dst_vxlan
->default_dst
.remote_ip
;
1909 struct net_device
*dev
= skb
->dev
;
1912 tx_stats
= this_cpu_ptr(src_vxlan
->dev
->tstats
);
1913 rx_stats
= this_cpu_ptr(dst_vxlan
->dev
->tstats
);
1914 skb
->pkt_type
= PACKET_HOST
;
1915 skb
->encapsulation
= 0;
1916 skb
->dev
= dst_vxlan
->dev
;
1917 __skb_pull(skb
, skb_network_offset(skb
));
1919 if (remote_ip
->sa
.sa_family
== AF_INET
) {
1920 loopback
.sin
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
1921 loopback
.sa
.sa_family
= AF_INET
;
1922 #if IS_ENABLED(CONFIG_IPV6)
1924 loopback
.sin6
.sin6_addr
= in6addr_loopback
;
1925 loopback
.sa
.sa_family
= AF_INET6
;
1929 if (dst_vxlan
->flags
& VXLAN_F_LEARN
)
1930 vxlan_snoop(skb
->dev
, &loopback
, eth_hdr(skb
)->h_source
);
1932 u64_stats_update_begin(&tx_stats
->syncp
);
1933 tx_stats
->tx_packets
++;
1934 tx_stats
->tx_bytes
+= len
;
1935 u64_stats_update_end(&tx_stats
->syncp
);
1937 if (netif_rx(skb
) == NET_RX_SUCCESS
) {
1938 u64_stats_update_begin(&rx_stats
->syncp
);
1939 rx_stats
->rx_packets
++;
1940 rx_stats
->rx_bytes
+= len
;
1941 u64_stats_update_end(&rx_stats
->syncp
);
1943 dev
->stats
.rx_dropped
++;
1947 static int encap_bypass_if_local(struct sk_buff
*skb
, struct net_device
*dev
,
1948 struct vxlan_dev
*vxlan
, union vxlan_addr
*daddr
,
1949 __be32 dst_port
, __be32 vni
, struct dst_entry
*dst
,
1952 #if IS_ENABLED(CONFIG_IPV6)
1953 /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of
1954 * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple
1955 * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry.
1957 BUILD_BUG_ON(RTCF_LOCAL
!= RTF_LOCAL
);
1959 /* Bypass encapsulation if the destination is local */
1960 if (rt_flags
& RTCF_LOCAL
&&
1961 !(rt_flags
& (RTCF_BROADCAST
| RTCF_MULTICAST
))) {
1962 struct vxlan_dev
*dst_vxlan
;
1965 dst_vxlan
= vxlan_find_vni(vxlan
->net
, vni
,
1966 daddr
->sa
.sa_family
, dst_port
,
1969 dev
->stats
.tx_errors
++;
1974 vxlan_encap_bypass(skb
, vxlan
, dst_vxlan
);
1981 static void vxlan_xmit_one(struct sk_buff
*skb
, struct net_device
*dev
,
1982 struct vxlan_rdst
*rdst
, bool did_rsc
)
1984 struct dst_cache
*dst_cache
;
1985 struct ip_tunnel_info
*info
;
1986 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1987 const struct iphdr
*old_iph
= ip_hdr(skb
);
1988 union vxlan_addr
*dst
;
1989 union vxlan_addr remote_ip
, local_ip
;
1990 union vxlan_addr
*src
;
1991 struct vxlan_metadata _md
;
1992 struct vxlan_metadata
*md
= &_md
;
1993 __be16 src_port
= 0, dst_port
;
1994 struct dst_entry
*ndst
= NULL
;
1998 u32 flags
= vxlan
->flags
;
1999 bool udp_sum
= false;
2000 bool xnet
= !net_eq(vxlan
->net
, dev_net(vxlan
->dev
));
2002 info
= skb_tunnel_info(skb
);
2005 dst
= &rdst
->remote_ip
;
2006 if (vxlan_addr_any(dst
)) {
2008 /* short-circuited back to local bridge */
2009 vxlan_encap_bypass(skb
, vxlan
, vxlan
);
2015 dst_port
= rdst
->remote_port
? rdst
->remote_port
: vxlan
->cfg
.dst_port
;
2016 vni
= rdst
->remote_vni
;
2017 src
= &vxlan
->cfg
.saddr
;
2018 dst_cache
= &rdst
->dst_cache
;
2019 md
->gbp
= skb
->mark
;
2020 ttl
= vxlan
->cfg
.ttl
;
2021 if (!ttl
&& vxlan_addr_multicast(dst
))
2024 tos
= vxlan
->cfg
.tos
;
2026 tos
= ip_tunnel_get_dsfield(old_iph
, skb
);
2028 if (dst
->sa
.sa_family
== AF_INET
)
2029 udp_sum
= !(flags
& VXLAN_F_UDP_ZERO_CSUM_TX
);
2031 udp_sum
= !(flags
& VXLAN_F_UDP_ZERO_CSUM6_TX
);
2032 label
= vxlan
->cfg
.label
;
2035 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
2039 remote_ip
.sa
.sa_family
= ip_tunnel_info_af(info
);
2040 if (remote_ip
.sa
.sa_family
== AF_INET
) {
2041 remote_ip
.sin
.sin_addr
.s_addr
= info
->key
.u
.ipv4
.dst
;
2042 local_ip
.sin
.sin_addr
.s_addr
= info
->key
.u
.ipv4
.src
;
2044 remote_ip
.sin6
.sin6_addr
= info
->key
.u
.ipv6
.dst
;
2045 local_ip
.sin6
.sin6_addr
= info
->key
.u
.ipv6
.src
;
2048 dst_port
= info
->key
.tp_dst
? : vxlan
->cfg
.dst_port
;
2049 vni
= tunnel_id_to_key32(info
->key
.tun_id
);
2051 dst_cache
= &info
->dst_cache
;
2052 if (info
->options_len
)
2053 md
= ip_tunnel_info_opts(info
);
2054 ttl
= info
->key
.ttl
;
2055 tos
= info
->key
.tos
;
2056 label
= info
->key
.label
;
2057 udp_sum
= !!(info
->key
.tun_flags
& TUNNEL_CSUM
);
2059 src_port
= udp_flow_src_port(dev_net(dev
), skb
, vxlan
->cfg
.port_min
,
2060 vxlan
->cfg
.port_max
, true);
2062 if (dst
->sa
.sa_family
== AF_INET
) {
2063 struct vxlan_sock
*sock4
= rcu_dereference(vxlan
->vn4_sock
);
2067 rt
= vxlan_get_route(vxlan
, dev
, sock4
, skb
,
2068 rdst
? rdst
->remote_ifindex
: 0, tos
,
2069 dst
->sin
.sin_addr
.s_addr
,
2070 &src
->sin
.sin_addr
.s_addr
,
2077 /* Bypass encapsulation if the destination is local */
2079 err
= encap_bypass_if_local(skb
, dev
, vxlan
, dst
,
2080 dst_port
, vni
, &rt
->dst
,
2084 } else if (info
->key
.tun_flags
& TUNNEL_DONT_FRAGMENT
) {
2089 tos
= ip_tunnel_ecn_encap(tos
, old_iph
, skb
);
2090 ttl
= ttl
? : ip4_dst_hoplimit(&rt
->dst
);
2091 err
= vxlan_build_skb(skb
, ndst
, sizeof(struct iphdr
),
2092 vni
, md
, flags
, udp_sum
);
2096 udp_tunnel_xmit_skb(rt
, sock4
->sock
->sk
, skb
, src
->sin
.sin_addr
.s_addr
,
2097 dst
->sin
.sin_addr
.s_addr
, tos
, ttl
, df
,
2098 src_port
, dst_port
, xnet
, !udp_sum
);
2099 #if IS_ENABLED(CONFIG_IPV6)
2101 struct vxlan_sock
*sock6
= rcu_dereference(vxlan
->vn6_sock
);
2103 ndst
= vxlan6_get_route(vxlan
, dev
, sock6
, skb
,
2104 rdst
? rdst
->remote_ifindex
: 0, tos
,
2105 label
, &dst
->sin6
.sin6_addr
,
2106 &src
->sin6
.sin6_addr
,
2109 err
= PTR_ERR(ndst
);
2115 u32 rt6i_flags
= ((struct rt6_info
*)ndst
)->rt6i_flags
;
2117 err
= encap_bypass_if_local(skb
, dev
, vxlan
, dst
,
2118 dst_port
, vni
, ndst
,
2124 tos
= ip_tunnel_ecn_encap(tos
, old_iph
, skb
);
2125 ttl
= ttl
? : ip6_dst_hoplimit(ndst
);
2126 skb_scrub_packet(skb
, xnet
);
2127 err
= vxlan_build_skb(skb
, ndst
, sizeof(struct ipv6hdr
),
2128 vni
, md
, flags
, udp_sum
);
2132 udp_tunnel6_xmit_skb(ndst
, sock6
->sock
->sk
, skb
, dev
,
2133 &src
->sin6
.sin6_addr
,
2134 &dst
->sin6
.sin6_addr
, tos
, ttl
,
2135 label
, src_port
, dst_port
, !udp_sum
);
2141 dev
->stats
.tx_dropped
++;
2147 dev
->stats
.collisions
++;
2148 else if (err
== -ENETUNREACH
)
2149 dev
->stats
.tx_carrier_errors
++;
2151 dev
->stats
.tx_errors
++;
2155 /* Transmit local packets over Vxlan
2157 * Outer IP header inherits ECN and DF from inner header.
2158 * Outer UDP destination is the VXLAN assigned port.
2159 * source port is based on hash of flow
2161 static netdev_tx_t
vxlan_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
2163 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2164 const struct ip_tunnel_info
*info
;
2166 bool did_rsc
= false;
2167 struct vxlan_rdst
*rdst
, *fdst
= NULL
;
2168 struct vxlan_fdb
*f
;
2170 info
= skb_tunnel_info(skb
);
2172 skb_reset_mac_header(skb
);
2174 if (vxlan
->flags
& VXLAN_F_COLLECT_METADATA
) {
2175 if (info
&& info
->mode
& IP_TUNNEL_INFO_TX
)
2176 vxlan_xmit_one(skb
, dev
, NULL
, false);
2179 return NETDEV_TX_OK
;
2182 if (vxlan
->flags
& VXLAN_F_PROXY
) {
2184 if (ntohs(eth
->h_proto
) == ETH_P_ARP
)
2185 return arp_reduce(dev
, skb
);
2186 #if IS_ENABLED(CONFIG_IPV6)
2187 else if (ntohs(eth
->h_proto
) == ETH_P_IPV6
&&
2188 pskb_may_pull(skb
, sizeof(struct ipv6hdr
)
2189 + sizeof(struct nd_msg
)) &&
2190 ipv6_hdr(skb
)->nexthdr
== IPPROTO_ICMPV6
) {
2193 msg
= (struct nd_msg
*)skb_transport_header(skb
);
2194 if (msg
->icmph
.icmp6_code
== 0 &&
2195 msg
->icmph
.icmp6_type
== NDISC_NEIGHBOUR_SOLICITATION
)
2196 return neigh_reduce(dev
, skb
);
2202 f
= vxlan_find_mac(vxlan
, eth
->h_dest
);
2205 if (f
&& (f
->flags
& NTF_ROUTER
) && (vxlan
->flags
& VXLAN_F_RSC
) &&
2206 (ntohs(eth
->h_proto
) == ETH_P_IP
||
2207 ntohs(eth
->h_proto
) == ETH_P_IPV6
)) {
2208 did_rsc
= route_shortcircuit(dev
, skb
);
2210 f
= vxlan_find_mac(vxlan
, eth
->h_dest
);
2214 f
= vxlan_find_mac(vxlan
, all_zeros_mac
);
2216 if ((vxlan
->flags
& VXLAN_F_L2MISS
) &&
2217 !is_multicast_ether_addr(eth
->h_dest
))
2218 vxlan_fdb_miss(vxlan
, eth
->h_dest
);
2220 dev
->stats
.tx_dropped
++;
2222 return NETDEV_TX_OK
;
2226 list_for_each_entry_rcu(rdst
, &f
->remotes
, list
) {
2227 struct sk_buff
*skb1
;
2233 skb1
= skb_clone(skb
, GFP_ATOMIC
);
2235 vxlan_xmit_one(skb1
, dev
, rdst
, did_rsc
);
2239 vxlan_xmit_one(skb
, dev
, fdst
, did_rsc
);
2242 return NETDEV_TX_OK
;
2245 /* Walk the forwarding table and purge stale entries */
2246 static void vxlan_cleanup(unsigned long arg
)
2248 struct vxlan_dev
*vxlan
= (struct vxlan_dev
*) arg
;
2249 unsigned long next_timer
= jiffies
+ FDB_AGE_INTERVAL
;
2252 if (!netif_running(vxlan
->dev
))
2255 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
2256 struct hlist_node
*p
, *n
;
2258 spin_lock_bh(&vxlan
->hash_lock
);
2259 hlist_for_each_safe(p
, n
, &vxlan
->fdb_head
[h
]) {
2261 = container_of(p
, struct vxlan_fdb
, hlist
);
2262 unsigned long timeout
;
2264 if (f
->state
& NUD_PERMANENT
)
2267 timeout
= f
->used
+ vxlan
->cfg
.age_interval
* HZ
;
2268 if (time_before_eq(timeout
, jiffies
)) {
2269 netdev_dbg(vxlan
->dev
,
2270 "garbage collect %pM\n",
2272 f
->state
= NUD_STALE
;
2273 vxlan_fdb_destroy(vxlan
, f
);
2274 } else if (time_before(timeout
, next_timer
))
2275 next_timer
= timeout
;
2277 spin_unlock_bh(&vxlan
->hash_lock
);
2280 mod_timer(&vxlan
->age_timer
, next_timer
);
2283 static void vxlan_vs_add_dev(struct vxlan_sock
*vs
, struct vxlan_dev
*vxlan
)
2285 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2286 __be32 vni
= vxlan
->default_dst
.remote_vni
;
2288 spin_lock(&vn
->sock_lock
);
2289 hlist_add_head_rcu(&vxlan
->hlist
, vni_head(vs
, vni
));
2290 spin_unlock(&vn
->sock_lock
);
2293 /* Setup stats when device is created */
2294 static int vxlan_init(struct net_device
*dev
)
2296 dev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
2303 static void vxlan_fdb_delete_default(struct vxlan_dev
*vxlan
)
2305 struct vxlan_fdb
*f
;
2307 spin_lock_bh(&vxlan
->hash_lock
);
2308 f
= __vxlan_find_mac(vxlan
, all_zeros_mac
);
2310 vxlan_fdb_destroy(vxlan
, f
);
2311 spin_unlock_bh(&vxlan
->hash_lock
);
2314 static void vxlan_uninit(struct net_device
*dev
)
2316 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2318 vxlan_fdb_delete_default(vxlan
);
2320 free_percpu(dev
->tstats
);
2323 /* Start ageing timer and join group when device is brought up */
2324 static int vxlan_open(struct net_device
*dev
)
2326 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2329 ret
= vxlan_sock_add(vxlan
);
2333 if (vxlan_addr_multicast(&vxlan
->default_dst
.remote_ip
)) {
2334 ret
= vxlan_igmp_join(vxlan
);
2335 if (ret
== -EADDRINUSE
)
2338 vxlan_sock_release(vxlan
);
2343 if (vxlan
->cfg
.age_interval
)
2344 mod_timer(&vxlan
->age_timer
, jiffies
+ FDB_AGE_INTERVAL
);
2349 /* Purge the forwarding table */
2350 static void vxlan_flush(struct vxlan_dev
*vxlan
)
2354 spin_lock_bh(&vxlan
->hash_lock
);
2355 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
2356 struct hlist_node
*p
, *n
;
2357 hlist_for_each_safe(p
, n
, &vxlan
->fdb_head
[h
]) {
2359 = container_of(p
, struct vxlan_fdb
, hlist
);
2360 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2361 if (!is_zero_ether_addr(f
->eth_addr
))
2362 vxlan_fdb_destroy(vxlan
, f
);
2365 spin_unlock_bh(&vxlan
->hash_lock
);
2368 /* Cleanup timer and forwarding table on shutdown */
2369 static int vxlan_stop(struct net_device
*dev
)
2371 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2372 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2375 if (vxlan_addr_multicast(&vxlan
->default_dst
.remote_ip
) &&
2376 !vxlan_group_used(vn
, vxlan
))
2377 ret
= vxlan_igmp_leave(vxlan
);
2379 del_timer_sync(&vxlan
->age_timer
);
2382 vxlan_sock_release(vxlan
);
2387 /* Stub, nothing needs to be done. */
2388 static void vxlan_set_multicast_list(struct net_device
*dev
)
2392 static int vxlan_change_mtu(struct net_device
*dev
, int new_mtu
)
2394 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2395 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
2396 struct net_device
*lowerdev
= __dev_get_by_index(vxlan
->net
,
2397 dst
->remote_ifindex
);
2398 bool use_ipv6
= false;
2400 if (dst
->remote_ip
.sa
.sa_family
== AF_INET6
)
2403 /* This check is different than dev->max_mtu, because it looks at
2404 * the lowerdev->mtu, rather than the static dev->max_mtu
2407 int max_mtu
= lowerdev
->mtu
-
2408 (use_ipv6
? VXLAN6_HEADROOM
: VXLAN_HEADROOM
);
2409 if (new_mtu
> max_mtu
)
2417 static int vxlan_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
)
2419 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2420 struct ip_tunnel_info
*info
= skb_tunnel_info(skb
);
2421 __be16 sport
, dport
;
2423 sport
= udp_flow_src_port(dev_net(dev
), skb
, vxlan
->cfg
.port_min
,
2424 vxlan
->cfg
.port_max
, true);
2425 dport
= info
->key
.tp_dst
? : vxlan
->cfg
.dst_port
;
2427 if (ip_tunnel_info_af(info
) == AF_INET
) {
2428 struct vxlan_sock
*sock4
= rcu_dereference(vxlan
->vn4_sock
);
2431 rt
= vxlan_get_route(vxlan
, dev
, sock4
, skb
, 0, info
->key
.tos
,
2432 info
->key
.u
.ipv4
.dst
,
2433 &info
->key
.u
.ipv4
.src
, NULL
, info
);
2438 #if IS_ENABLED(CONFIG_IPV6)
2439 struct vxlan_sock
*sock6
= rcu_dereference(vxlan
->vn6_sock
);
2440 struct dst_entry
*ndst
;
2442 ndst
= vxlan6_get_route(vxlan
, dev
, sock6
, skb
, 0, info
->key
.tos
,
2443 info
->key
.label
, &info
->key
.u
.ipv6
.dst
,
2444 &info
->key
.u
.ipv6
.src
, NULL
, info
);
2446 return PTR_ERR(ndst
);
2448 #else /* !CONFIG_IPV6 */
2449 return -EPFNOSUPPORT
;
2452 info
->key
.tp_src
= sport
;
2453 info
->key
.tp_dst
= dport
;
2457 static const struct net_device_ops vxlan_netdev_ether_ops
= {
2458 .ndo_init
= vxlan_init
,
2459 .ndo_uninit
= vxlan_uninit
,
2460 .ndo_open
= vxlan_open
,
2461 .ndo_stop
= vxlan_stop
,
2462 .ndo_start_xmit
= vxlan_xmit
,
2463 .ndo_get_stats64
= ip_tunnel_get_stats64
,
2464 .ndo_set_rx_mode
= vxlan_set_multicast_list
,
2465 .ndo_change_mtu
= vxlan_change_mtu
,
2466 .ndo_validate_addr
= eth_validate_addr
,
2467 .ndo_set_mac_address
= eth_mac_addr
,
2468 .ndo_fdb_add
= vxlan_fdb_add
,
2469 .ndo_fdb_del
= vxlan_fdb_delete
,
2470 .ndo_fdb_dump
= vxlan_fdb_dump
,
2471 .ndo_fill_metadata_dst
= vxlan_fill_metadata_dst
,
2474 static const struct net_device_ops vxlan_netdev_raw_ops
= {
2475 .ndo_init
= vxlan_init
,
2476 .ndo_uninit
= vxlan_uninit
,
2477 .ndo_open
= vxlan_open
,
2478 .ndo_stop
= vxlan_stop
,
2479 .ndo_start_xmit
= vxlan_xmit
,
2480 .ndo_get_stats64
= ip_tunnel_get_stats64
,
2481 .ndo_change_mtu
= vxlan_change_mtu
,
2482 .ndo_fill_metadata_dst
= vxlan_fill_metadata_dst
,
2485 /* Info for udev, that this is a virtual tunnel endpoint */
2486 static struct device_type vxlan_type
= {
2490 /* Calls the ndo_udp_tunnel_add of the caller in order to
2491 * supply the listening VXLAN udp ports. Callers are expected
2492 * to implement the ndo_udp_tunnel_add.
2494 static void vxlan_push_rx_ports(struct net_device
*dev
)
2496 struct vxlan_sock
*vs
;
2497 struct net
*net
= dev_net(dev
);
2498 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
2501 spin_lock(&vn
->sock_lock
);
2502 for (i
= 0; i
< PORT_HASH_SIZE
; ++i
) {
2503 hlist_for_each_entry_rcu(vs
, &vn
->sock_list
[i
], hlist
)
2504 udp_tunnel_push_rx_port(dev
, vs
->sock
,
2505 (vs
->flags
& VXLAN_F_GPE
) ?
2506 UDP_TUNNEL_TYPE_VXLAN_GPE
:
2507 UDP_TUNNEL_TYPE_VXLAN
);
2509 spin_unlock(&vn
->sock_lock
);
2512 /* Initialize the device structure. */
2513 static void vxlan_setup(struct net_device
*dev
)
2515 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2518 eth_hw_addr_random(dev
);
2521 dev
->destructor
= free_netdev
;
2522 SET_NETDEV_DEVTYPE(dev
, &vxlan_type
);
2524 dev
->features
|= NETIF_F_LLTX
;
2525 dev
->features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
;
2526 dev
->features
|= NETIF_F_RXCSUM
;
2527 dev
->features
|= NETIF_F_GSO_SOFTWARE
;
2529 dev
->vlan_features
= dev
->features
;
2530 dev
->hw_features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
| NETIF_F_RXCSUM
;
2531 dev
->hw_features
|= NETIF_F_GSO_SOFTWARE
;
2532 netif_keep_dst(dev
);
2533 dev
->priv_flags
|= IFF_NO_QUEUE
;
2535 INIT_LIST_HEAD(&vxlan
->next
);
2536 spin_lock_init(&vxlan
->hash_lock
);
2538 init_timer_deferrable(&vxlan
->age_timer
);
2539 vxlan
->age_timer
.function
= vxlan_cleanup
;
2540 vxlan
->age_timer
.data
= (unsigned long) vxlan
;
2542 vxlan
->cfg
.dst_port
= htons(vxlan_port
);
2546 gro_cells_init(&vxlan
->gro_cells
, dev
);
2548 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
)
2549 INIT_HLIST_HEAD(&vxlan
->fdb_head
[h
]);
2552 static void vxlan_ether_setup(struct net_device
*dev
)
2554 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
2555 dev
->priv_flags
|= IFF_LIVE_ADDR_CHANGE
;
2556 dev
->netdev_ops
= &vxlan_netdev_ether_ops
;
2559 static void vxlan_raw_setup(struct net_device
*dev
)
2561 dev
->header_ops
= NULL
;
2562 dev
->type
= ARPHRD_NONE
;
2563 dev
->hard_header_len
= 0;
2565 dev
->flags
= IFF_POINTOPOINT
| IFF_NOARP
| IFF_MULTICAST
;
2566 dev
->netdev_ops
= &vxlan_netdev_raw_ops
;
2569 static const struct nla_policy vxlan_policy
[IFLA_VXLAN_MAX
+ 1] = {
2570 [IFLA_VXLAN_ID
] = { .type
= NLA_U32
},
2571 [IFLA_VXLAN_GROUP
] = { .len
= FIELD_SIZEOF(struct iphdr
, daddr
) },
2572 [IFLA_VXLAN_GROUP6
] = { .len
= sizeof(struct in6_addr
) },
2573 [IFLA_VXLAN_LINK
] = { .type
= NLA_U32
},
2574 [IFLA_VXLAN_LOCAL
] = { .len
= FIELD_SIZEOF(struct iphdr
, saddr
) },
2575 [IFLA_VXLAN_LOCAL6
] = { .len
= sizeof(struct in6_addr
) },
2576 [IFLA_VXLAN_TOS
] = { .type
= NLA_U8
},
2577 [IFLA_VXLAN_TTL
] = { .type
= NLA_U8
},
2578 [IFLA_VXLAN_LABEL
] = { .type
= NLA_U32
},
2579 [IFLA_VXLAN_LEARNING
] = { .type
= NLA_U8
},
2580 [IFLA_VXLAN_AGEING
] = { .type
= NLA_U32
},
2581 [IFLA_VXLAN_LIMIT
] = { .type
= NLA_U32
},
2582 [IFLA_VXLAN_PORT_RANGE
] = { .len
= sizeof(struct ifla_vxlan_port_range
) },
2583 [IFLA_VXLAN_PROXY
] = { .type
= NLA_U8
},
2584 [IFLA_VXLAN_RSC
] = { .type
= NLA_U8
},
2585 [IFLA_VXLAN_L2MISS
] = { .type
= NLA_U8
},
2586 [IFLA_VXLAN_L3MISS
] = { .type
= NLA_U8
},
2587 [IFLA_VXLAN_COLLECT_METADATA
] = { .type
= NLA_U8
},
2588 [IFLA_VXLAN_PORT
] = { .type
= NLA_U16
},
2589 [IFLA_VXLAN_UDP_CSUM
] = { .type
= NLA_U8
},
2590 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX
] = { .type
= NLA_U8
},
2591 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX
] = { .type
= NLA_U8
},
2592 [IFLA_VXLAN_REMCSUM_TX
] = { .type
= NLA_U8
},
2593 [IFLA_VXLAN_REMCSUM_RX
] = { .type
= NLA_U8
},
2594 [IFLA_VXLAN_GBP
] = { .type
= NLA_FLAG
, },
2595 [IFLA_VXLAN_GPE
] = { .type
= NLA_FLAG
, },
2596 [IFLA_VXLAN_REMCSUM_NOPARTIAL
] = { .type
= NLA_FLAG
},
2599 static int vxlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
2601 if (tb
[IFLA_ADDRESS
]) {
2602 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
) {
2603 pr_debug("invalid link address (not ethernet)\n");
2607 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
]))) {
2608 pr_debug("invalid all zero ethernet address\n");
2609 return -EADDRNOTAVAIL
;
2616 if (data
[IFLA_VXLAN_ID
]) {
2617 __u32 id
= nla_get_u32(data
[IFLA_VXLAN_ID
]);
2618 if (id
>= VXLAN_VID_MASK
)
2622 if (data
[IFLA_VXLAN_PORT_RANGE
]) {
2623 const struct ifla_vxlan_port_range
*p
2624 = nla_data(data
[IFLA_VXLAN_PORT_RANGE
]);
2626 if (ntohs(p
->high
) < ntohs(p
->low
)) {
2627 pr_debug("port range %u .. %u not valid\n",
2628 ntohs(p
->low
), ntohs(p
->high
));
2636 static void vxlan_get_drvinfo(struct net_device
*netdev
,
2637 struct ethtool_drvinfo
*drvinfo
)
2639 strlcpy(drvinfo
->version
, VXLAN_VERSION
, sizeof(drvinfo
->version
));
2640 strlcpy(drvinfo
->driver
, "vxlan", sizeof(drvinfo
->driver
));
2643 static const struct ethtool_ops vxlan_ethtool_ops
= {
2644 .get_drvinfo
= vxlan_get_drvinfo
,
2645 .get_link
= ethtool_op_get_link
,
2648 static struct socket
*vxlan_create_sock(struct net
*net
, bool ipv6
,
2649 __be16 port
, u32 flags
)
2651 struct socket
*sock
;
2652 struct udp_port_cfg udp_conf
;
2655 memset(&udp_conf
, 0, sizeof(udp_conf
));
2658 udp_conf
.family
= AF_INET6
;
2659 udp_conf
.use_udp6_rx_checksums
=
2660 !(flags
& VXLAN_F_UDP_ZERO_CSUM6_RX
);
2661 udp_conf
.ipv6_v6only
= 1;
2663 udp_conf
.family
= AF_INET
;
2666 udp_conf
.local_udp_port
= port
;
2668 /* Open UDP socket */
2669 err
= udp_sock_create(net
, &udp_conf
, &sock
);
2671 return ERR_PTR(err
);
2676 /* Create new listen socket if needed */
2677 static struct vxlan_sock
*vxlan_socket_create(struct net
*net
, bool ipv6
,
2678 __be16 port
, u32 flags
)
2680 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
2681 struct vxlan_sock
*vs
;
2682 struct socket
*sock
;
2684 struct udp_tunnel_sock_cfg tunnel_cfg
;
2686 vs
= kzalloc(sizeof(*vs
), GFP_KERNEL
);
2688 return ERR_PTR(-ENOMEM
);
2690 for (h
= 0; h
< VNI_HASH_SIZE
; ++h
)
2691 INIT_HLIST_HEAD(&vs
->vni_list
[h
]);
2693 sock
= vxlan_create_sock(net
, ipv6
, port
, flags
);
2695 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port
),
2698 return ERR_CAST(sock
);
2702 atomic_set(&vs
->refcnt
, 1);
2703 vs
->flags
= (flags
& VXLAN_F_RCV_FLAGS
);
2705 spin_lock(&vn
->sock_lock
);
2706 hlist_add_head_rcu(&vs
->hlist
, vs_head(net
, port
));
2707 udp_tunnel_notify_add_rx_port(sock
,
2708 (vs
->flags
& VXLAN_F_GPE
) ?
2709 UDP_TUNNEL_TYPE_VXLAN_GPE
:
2710 UDP_TUNNEL_TYPE_VXLAN
);
2711 spin_unlock(&vn
->sock_lock
);
2713 /* Mark socket as an encapsulation socket. */
2714 memset(&tunnel_cfg
, 0, sizeof(tunnel_cfg
));
2715 tunnel_cfg
.sk_user_data
= vs
;
2716 tunnel_cfg
.encap_type
= 1;
2717 tunnel_cfg
.encap_rcv
= vxlan_rcv
;
2718 tunnel_cfg
.encap_destroy
= NULL
;
2719 tunnel_cfg
.gro_receive
= vxlan_gro_receive
;
2720 tunnel_cfg
.gro_complete
= vxlan_gro_complete
;
2722 setup_udp_tunnel_sock(net
, sock
, &tunnel_cfg
);
2727 static int __vxlan_sock_add(struct vxlan_dev
*vxlan
, bool ipv6
)
2729 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2730 struct vxlan_sock
*vs
= NULL
;
2732 if (!vxlan
->cfg
.no_share
) {
2733 spin_lock(&vn
->sock_lock
);
2734 vs
= vxlan_find_sock(vxlan
->net
, ipv6
? AF_INET6
: AF_INET
,
2735 vxlan
->cfg
.dst_port
, vxlan
->flags
);
2736 if (vs
&& !atomic_add_unless(&vs
->refcnt
, 1, 0)) {
2737 spin_unlock(&vn
->sock_lock
);
2740 spin_unlock(&vn
->sock_lock
);
2743 vs
= vxlan_socket_create(vxlan
->net
, ipv6
,
2744 vxlan
->cfg
.dst_port
, vxlan
->flags
);
2747 #if IS_ENABLED(CONFIG_IPV6)
2749 rcu_assign_pointer(vxlan
->vn6_sock
, vs
);
2752 rcu_assign_pointer(vxlan
->vn4_sock
, vs
);
2753 vxlan_vs_add_dev(vs
, vxlan
);
2757 static int vxlan_sock_add(struct vxlan_dev
*vxlan
)
2759 bool ipv6
= vxlan
->flags
& VXLAN_F_IPV6
;
2760 bool metadata
= vxlan
->flags
& VXLAN_F_COLLECT_METADATA
;
2763 RCU_INIT_POINTER(vxlan
->vn4_sock
, NULL
);
2764 #if IS_ENABLED(CONFIG_IPV6)
2765 RCU_INIT_POINTER(vxlan
->vn6_sock
, NULL
);
2766 if (ipv6
|| metadata
)
2767 ret
= __vxlan_sock_add(vxlan
, true);
2769 if (!ret
&& (!ipv6
|| metadata
))
2770 ret
= __vxlan_sock_add(vxlan
, false);
2772 vxlan_sock_release(vxlan
);
2776 static int vxlan_dev_configure(struct net
*src_net
, struct net_device
*dev
,
2777 struct vxlan_config
*conf
)
2779 struct vxlan_net
*vn
= net_generic(src_net
, vxlan_net_id
);
2780 struct vxlan_dev
*vxlan
= netdev_priv(dev
), *tmp
;
2781 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
2782 unsigned short needed_headroom
= ETH_HLEN
;
2784 bool use_ipv6
= false;
2785 __be16 default_port
= vxlan
->cfg
.dst_port
;
2786 struct net_device
*lowerdev
= NULL
;
2788 if (conf
->flags
& VXLAN_F_GPE
) {
2789 /* For now, allow GPE only together with COLLECT_METADATA.
2790 * This can be relaxed later; in such case, the other side
2791 * of the PtP link will have to be provided.
2793 if ((conf
->flags
& ~VXLAN_F_ALLOWED_GPE
) ||
2794 !(conf
->flags
& VXLAN_F_COLLECT_METADATA
)) {
2795 pr_info("unsupported combination of extensions\n");
2799 vxlan_raw_setup(dev
);
2801 vxlan_ether_setup(dev
);
2804 /* MTU range: 68 - 65535 */
2805 dev
->min_mtu
= ETH_MIN_MTU
;
2806 dev
->max_mtu
= ETH_MAX_MTU
;
2808 vxlan
->net
= src_net
;
2810 dst
->remote_vni
= conf
->vni
;
2812 memcpy(&dst
->remote_ip
, &conf
->remote_ip
, sizeof(conf
->remote_ip
));
2814 /* Unless IPv6 is explicitly requested, assume IPv4 */
2815 if (!dst
->remote_ip
.sa
.sa_family
)
2816 dst
->remote_ip
.sa
.sa_family
= AF_INET
;
2818 if (dst
->remote_ip
.sa
.sa_family
== AF_INET6
||
2819 vxlan
->cfg
.saddr
.sa
.sa_family
== AF_INET6
) {
2820 if (!IS_ENABLED(CONFIG_IPV6
))
2821 return -EPFNOSUPPORT
;
2823 vxlan
->flags
|= VXLAN_F_IPV6
;
2826 if (conf
->label
&& !use_ipv6
) {
2827 pr_info("label only supported in use with IPv6\n");
2831 if (conf
->remote_ifindex
) {
2832 lowerdev
= __dev_get_by_index(src_net
, conf
->remote_ifindex
);
2833 dst
->remote_ifindex
= conf
->remote_ifindex
;
2836 pr_info("ifindex %d does not exist\n", dst
->remote_ifindex
);
2840 #if IS_ENABLED(CONFIG_IPV6)
2842 struct inet6_dev
*idev
= __in6_dev_get(lowerdev
);
2843 if (idev
&& idev
->cnf
.disable_ipv6
) {
2844 pr_info("IPv6 is disabled via sysctl\n");
2851 dev
->mtu
= lowerdev
->mtu
-
2852 (use_ipv6
? VXLAN6_HEADROOM
: VXLAN_HEADROOM
);
2854 needed_headroom
= lowerdev
->hard_header_len
;
2855 } else if (vxlan_addr_multicast(&dst
->remote_ip
)) {
2856 pr_info("multicast destination requires interface to be specified\n");
2861 int max_mtu
= ETH_MAX_MTU
;
2864 max_mtu
= lowerdev
->mtu
;
2866 max_mtu
-= (use_ipv6
? VXLAN6_HEADROOM
: VXLAN_HEADROOM
);
2868 if (conf
->mtu
< dev
->min_mtu
|| conf
->mtu
> dev
->max_mtu
)
2871 dev
->mtu
= conf
->mtu
;
2873 if (conf
->mtu
> max_mtu
)
2877 if (use_ipv6
|| conf
->flags
& VXLAN_F_COLLECT_METADATA
)
2878 needed_headroom
+= VXLAN6_HEADROOM
;
2880 needed_headroom
+= VXLAN_HEADROOM
;
2881 dev
->needed_headroom
= needed_headroom
;
2883 memcpy(&vxlan
->cfg
, conf
, sizeof(*conf
));
2884 if (!vxlan
->cfg
.dst_port
) {
2885 if (conf
->flags
& VXLAN_F_GPE
)
2886 vxlan
->cfg
.dst_port
= 4790; /* IANA assigned VXLAN-GPE port */
2888 vxlan
->cfg
.dst_port
= default_port
;
2890 vxlan
->flags
|= conf
->flags
;
2892 if (!vxlan
->cfg
.age_interval
)
2893 vxlan
->cfg
.age_interval
= FDB_AGE_DEFAULT
;
2895 list_for_each_entry(tmp
, &vn
->vxlan_list
, next
) {
2896 if (tmp
->cfg
.vni
== conf
->vni
&&
2897 (tmp
->default_dst
.remote_ip
.sa
.sa_family
== AF_INET6
||
2898 tmp
->cfg
.saddr
.sa
.sa_family
== AF_INET6
) == use_ipv6
&&
2899 tmp
->cfg
.dst_port
== vxlan
->cfg
.dst_port
&&
2900 (tmp
->flags
& VXLAN_F_RCV_FLAGS
) ==
2901 (vxlan
->flags
& VXLAN_F_RCV_FLAGS
)) {
2902 pr_info("duplicate VNI %u\n", be32_to_cpu(conf
->vni
));
2907 dev
->ethtool_ops
= &vxlan_ethtool_ops
;
2909 /* create an fdb entry for a valid default destination */
2910 if (!vxlan_addr_any(&vxlan
->default_dst
.remote_ip
)) {
2911 err
= vxlan_fdb_create(vxlan
, all_zeros_mac
,
2912 &vxlan
->default_dst
.remote_ip
,
2913 NUD_REACHABLE
|NUD_PERMANENT
,
2914 NLM_F_EXCL
|NLM_F_CREATE
,
2915 vxlan
->cfg
.dst_port
,
2916 vxlan
->default_dst
.remote_vni
,
2917 vxlan
->default_dst
.remote_ifindex
,
2923 err
= register_netdevice(dev
);
2925 vxlan_fdb_delete_default(vxlan
);
2929 list_add(&vxlan
->next
, &vn
->vxlan_list
);
2934 static int vxlan_newlink(struct net
*src_net
, struct net_device
*dev
,
2935 struct nlattr
*tb
[], struct nlattr
*data
[])
2937 struct vxlan_config conf
;
2939 memset(&conf
, 0, sizeof(conf
));
2941 if (data
[IFLA_VXLAN_ID
])
2942 conf
.vni
= cpu_to_be32(nla_get_u32(data
[IFLA_VXLAN_ID
]));
2944 if (data
[IFLA_VXLAN_GROUP
]) {
2945 conf
.remote_ip
.sin
.sin_addr
.s_addr
= nla_get_in_addr(data
[IFLA_VXLAN_GROUP
]);
2946 } else if (data
[IFLA_VXLAN_GROUP6
]) {
2947 if (!IS_ENABLED(CONFIG_IPV6
))
2948 return -EPFNOSUPPORT
;
2950 conf
.remote_ip
.sin6
.sin6_addr
= nla_get_in6_addr(data
[IFLA_VXLAN_GROUP6
]);
2951 conf
.remote_ip
.sa
.sa_family
= AF_INET6
;
2954 if (data
[IFLA_VXLAN_LOCAL
]) {
2955 conf
.saddr
.sin
.sin_addr
.s_addr
= nla_get_in_addr(data
[IFLA_VXLAN_LOCAL
]);
2956 conf
.saddr
.sa
.sa_family
= AF_INET
;
2957 } else if (data
[IFLA_VXLAN_LOCAL6
]) {
2958 if (!IS_ENABLED(CONFIG_IPV6
))
2959 return -EPFNOSUPPORT
;
2961 /* TODO: respect scope id */
2962 conf
.saddr
.sin6
.sin6_addr
= nla_get_in6_addr(data
[IFLA_VXLAN_LOCAL6
]);
2963 conf
.saddr
.sa
.sa_family
= AF_INET6
;
2966 if (data
[IFLA_VXLAN_LINK
])
2967 conf
.remote_ifindex
= nla_get_u32(data
[IFLA_VXLAN_LINK
]);
2969 if (data
[IFLA_VXLAN_TOS
])
2970 conf
.tos
= nla_get_u8(data
[IFLA_VXLAN_TOS
]);
2972 if (data
[IFLA_VXLAN_TTL
])
2973 conf
.ttl
= nla_get_u8(data
[IFLA_VXLAN_TTL
]);
2975 if (data
[IFLA_VXLAN_LABEL
])
2976 conf
.label
= nla_get_be32(data
[IFLA_VXLAN_LABEL
]) &
2977 IPV6_FLOWLABEL_MASK
;
2979 if (!data
[IFLA_VXLAN_LEARNING
] || nla_get_u8(data
[IFLA_VXLAN_LEARNING
]))
2980 conf
.flags
|= VXLAN_F_LEARN
;
2982 if (data
[IFLA_VXLAN_AGEING
])
2983 conf
.age_interval
= nla_get_u32(data
[IFLA_VXLAN_AGEING
]);
2985 if (data
[IFLA_VXLAN_PROXY
] && nla_get_u8(data
[IFLA_VXLAN_PROXY
]))
2986 conf
.flags
|= VXLAN_F_PROXY
;
2988 if (data
[IFLA_VXLAN_RSC
] && nla_get_u8(data
[IFLA_VXLAN_RSC
]))
2989 conf
.flags
|= VXLAN_F_RSC
;
2991 if (data
[IFLA_VXLAN_L2MISS
] && nla_get_u8(data
[IFLA_VXLAN_L2MISS
]))
2992 conf
.flags
|= VXLAN_F_L2MISS
;
2994 if (data
[IFLA_VXLAN_L3MISS
] && nla_get_u8(data
[IFLA_VXLAN_L3MISS
]))
2995 conf
.flags
|= VXLAN_F_L3MISS
;
2997 if (data
[IFLA_VXLAN_LIMIT
])
2998 conf
.addrmax
= nla_get_u32(data
[IFLA_VXLAN_LIMIT
]);
3000 if (data
[IFLA_VXLAN_COLLECT_METADATA
] &&
3001 nla_get_u8(data
[IFLA_VXLAN_COLLECT_METADATA
]))
3002 conf
.flags
|= VXLAN_F_COLLECT_METADATA
;
3004 if (data
[IFLA_VXLAN_PORT_RANGE
]) {
3005 const struct ifla_vxlan_port_range
*p
3006 = nla_data(data
[IFLA_VXLAN_PORT_RANGE
]);
3007 conf
.port_min
= ntohs(p
->low
);
3008 conf
.port_max
= ntohs(p
->high
);
3011 if (data
[IFLA_VXLAN_PORT
])
3012 conf
.dst_port
= nla_get_be16(data
[IFLA_VXLAN_PORT
]);
3014 if (data
[IFLA_VXLAN_UDP_CSUM
] &&
3015 !nla_get_u8(data
[IFLA_VXLAN_UDP_CSUM
]))
3016 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM_TX
;
3018 if (data
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
] &&
3019 nla_get_u8(data
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
]))
3020 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM6_TX
;
3022 if (data
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
] &&
3023 nla_get_u8(data
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
]))
3024 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM6_RX
;
3026 if (data
[IFLA_VXLAN_REMCSUM_TX
] &&
3027 nla_get_u8(data
[IFLA_VXLAN_REMCSUM_TX
]))
3028 conf
.flags
|= VXLAN_F_REMCSUM_TX
;
3030 if (data
[IFLA_VXLAN_REMCSUM_RX
] &&
3031 nla_get_u8(data
[IFLA_VXLAN_REMCSUM_RX
]))
3032 conf
.flags
|= VXLAN_F_REMCSUM_RX
;
3034 if (data
[IFLA_VXLAN_GBP
])
3035 conf
.flags
|= VXLAN_F_GBP
;
3037 if (data
[IFLA_VXLAN_GPE
])
3038 conf
.flags
|= VXLAN_F_GPE
;
3040 if (data
[IFLA_VXLAN_REMCSUM_NOPARTIAL
])
3041 conf
.flags
|= VXLAN_F_REMCSUM_NOPARTIAL
;
3044 conf
.mtu
= nla_get_u32(tb
[IFLA_MTU
]);
3046 return vxlan_dev_configure(src_net
, dev
, &conf
);
3049 static void vxlan_dellink(struct net_device
*dev
, struct list_head
*head
)
3051 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3052 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
3054 spin_lock(&vn
->sock_lock
);
3055 if (!hlist_unhashed(&vxlan
->hlist
))
3056 hlist_del_rcu(&vxlan
->hlist
);
3057 spin_unlock(&vn
->sock_lock
);
3059 gro_cells_destroy(&vxlan
->gro_cells
);
3060 list_del(&vxlan
->next
);
3061 unregister_netdevice_queue(dev
, head
);
3064 static size_t vxlan_get_size(const struct net_device
*dev
)
3067 return nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_ID */
3068 nla_total_size(sizeof(struct in6_addr
)) + /* IFLA_VXLAN_GROUP{6} */
3069 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_LINK */
3070 nla_total_size(sizeof(struct in6_addr
)) + /* IFLA_VXLAN_LOCAL{6} */
3071 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_TTL */
3072 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_TOS */
3073 nla_total_size(sizeof(__be32
)) + /* IFLA_VXLAN_LABEL */
3074 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_LEARNING */
3075 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_PROXY */
3076 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_RSC */
3077 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_L2MISS */
3078 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_L3MISS */
3079 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_COLLECT_METADATA */
3080 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_AGEING */
3081 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_LIMIT */
3082 nla_total_size(sizeof(struct ifla_vxlan_port_range
)) +
3083 nla_total_size(sizeof(__be16
)) + /* IFLA_VXLAN_PORT */
3084 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_CSUM */
3085 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3086 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
3087 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_REMCSUM_TX */
3088 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_REMCSUM_RX */
3092 static int vxlan_fill_info(struct sk_buff
*skb
, const struct net_device
*dev
)
3094 const struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3095 const struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
3096 struct ifla_vxlan_port_range ports
= {
3097 .low
= htons(vxlan
->cfg
.port_min
),
3098 .high
= htons(vxlan
->cfg
.port_max
),
3101 if (nla_put_u32(skb
, IFLA_VXLAN_ID
, be32_to_cpu(dst
->remote_vni
)))
3102 goto nla_put_failure
;
3104 if (!vxlan_addr_any(&dst
->remote_ip
)) {
3105 if (dst
->remote_ip
.sa
.sa_family
== AF_INET
) {
3106 if (nla_put_in_addr(skb
, IFLA_VXLAN_GROUP
,
3107 dst
->remote_ip
.sin
.sin_addr
.s_addr
))
3108 goto nla_put_failure
;
3109 #if IS_ENABLED(CONFIG_IPV6)
3111 if (nla_put_in6_addr(skb
, IFLA_VXLAN_GROUP6
,
3112 &dst
->remote_ip
.sin6
.sin6_addr
))
3113 goto nla_put_failure
;
3118 if (dst
->remote_ifindex
&& nla_put_u32(skb
, IFLA_VXLAN_LINK
, dst
->remote_ifindex
))
3119 goto nla_put_failure
;
3121 if (!vxlan_addr_any(&vxlan
->cfg
.saddr
)) {
3122 if (vxlan
->cfg
.saddr
.sa
.sa_family
== AF_INET
) {
3123 if (nla_put_in_addr(skb
, IFLA_VXLAN_LOCAL
,
3124 vxlan
->cfg
.saddr
.sin
.sin_addr
.s_addr
))
3125 goto nla_put_failure
;
3126 #if IS_ENABLED(CONFIG_IPV6)
3128 if (nla_put_in6_addr(skb
, IFLA_VXLAN_LOCAL6
,
3129 &vxlan
->cfg
.saddr
.sin6
.sin6_addr
))
3130 goto nla_put_failure
;
3135 if (nla_put_u8(skb
, IFLA_VXLAN_TTL
, vxlan
->cfg
.ttl
) ||
3136 nla_put_u8(skb
, IFLA_VXLAN_TOS
, vxlan
->cfg
.tos
) ||
3137 nla_put_be32(skb
, IFLA_VXLAN_LABEL
, vxlan
->cfg
.label
) ||
3138 nla_put_u8(skb
, IFLA_VXLAN_LEARNING
,
3139 !!(vxlan
->flags
& VXLAN_F_LEARN
)) ||
3140 nla_put_u8(skb
, IFLA_VXLAN_PROXY
,
3141 !!(vxlan
->flags
& VXLAN_F_PROXY
)) ||
3142 nla_put_u8(skb
, IFLA_VXLAN_RSC
, !!(vxlan
->flags
& VXLAN_F_RSC
)) ||
3143 nla_put_u8(skb
, IFLA_VXLAN_L2MISS
,
3144 !!(vxlan
->flags
& VXLAN_F_L2MISS
)) ||
3145 nla_put_u8(skb
, IFLA_VXLAN_L3MISS
,
3146 !!(vxlan
->flags
& VXLAN_F_L3MISS
)) ||
3147 nla_put_u8(skb
, IFLA_VXLAN_COLLECT_METADATA
,
3148 !!(vxlan
->flags
& VXLAN_F_COLLECT_METADATA
)) ||
3149 nla_put_u32(skb
, IFLA_VXLAN_AGEING
, vxlan
->cfg
.age_interval
) ||
3150 nla_put_u32(skb
, IFLA_VXLAN_LIMIT
, vxlan
->cfg
.addrmax
) ||
3151 nla_put_be16(skb
, IFLA_VXLAN_PORT
, vxlan
->cfg
.dst_port
) ||
3152 nla_put_u8(skb
, IFLA_VXLAN_UDP_CSUM
,
3153 !(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM_TX
)) ||
3154 nla_put_u8(skb
, IFLA_VXLAN_UDP_ZERO_CSUM6_TX
,
3155 !!(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM6_TX
)) ||
3156 nla_put_u8(skb
, IFLA_VXLAN_UDP_ZERO_CSUM6_RX
,
3157 !!(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM6_RX
)) ||
3158 nla_put_u8(skb
, IFLA_VXLAN_REMCSUM_TX
,
3159 !!(vxlan
->flags
& VXLAN_F_REMCSUM_TX
)) ||
3160 nla_put_u8(skb
, IFLA_VXLAN_REMCSUM_RX
,
3161 !!(vxlan
->flags
& VXLAN_F_REMCSUM_RX
)))
3162 goto nla_put_failure
;
3164 if (nla_put(skb
, IFLA_VXLAN_PORT_RANGE
, sizeof(ports
), &ports
))
3165 goto nla_put_failure
;
3167 if (vxlan
->flags
& VXLAN_F_GBP
&&
3168 nla_put_flag(skb
, IFLA_VXLAN_GBP
))
3169 goto nla_put_failure
;
3171 if (vxlan
->flags
& VXLAN_F_GPE
&&
3172 nla_put_flag(skb
, IFLA_VXLAN_GPE
))
3173 goto nla_put_failure
;
3175 if (vxlan
->flags
& VXLAN_F_REMCSUM_NOPARTIAL
&&
3176 nla_put_flag(skb
, IFLA_VXLAN_REMCSUM_NOPARTIAL
))
3177 goto nla_put_failure
;
3185 static struct net
*vxlan_get_link_net(const struct net_device
*dev
)
3187 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3192 static struct rtnl_link_ops vxlan_link_ops __read_mostly
= {
3194 .maxtype
= IFLA_VXLAN_MAX
,
3195 .policy
= vxlan_policy
,
3196 .priv_size
= sizeof(struct vxlan_dev
),
3197 .setup
= vxlan_setup
,
3198 .validate
= vxlan_validate
,
3199 .newlink
= vxlan_newlink
,
3200 .dellink
= vxlan_dellink
,
3201 .get_size
= vxlan_get_size
,
3202 .fill_info
= vxlan_fill_info
,
3203 .get_link_net
= vxlan_get_link_net
,
3206 struct net_device
*vxlan_dev_create(struct net
*net
, const char *name
,
3207 u8 name_assign_type
,
3208 struct vxlan_config
*conf
)
3210 struct nlattr
*tb
[IFLA_MAX
+ 1];
3211 struct net_device
*dev
;
3214 memset(&tb
, 0, sizeof(tb
));
3216 dev
= rtnl_create_link(net
, name
, name_assign_type
,
3217 &vxlan_link_ops
, tb
);
3221 err
= vxlan_dev_configure(net
, dev
, conf
);
3224 return ERR_PTR(err
);
3227 err
= rtnl_configure_link(dev
, NULL
);
3229 LIST_HEAD(list_kill
);
3231 vxlan_dellink(dev
, &list_kill
);
3232 unregister_netdevice_many(&list_kill
);
3233 return ERR_PTR(err
);
3238 EXPORT_SYMBOL_GPL(vxlan_dev_create
);
3240 static void vxlan_handle_lowerdev_unregister(struct vxlan_net
*vn
,
3241 struct net_device
*dev
)
3243 struct vxlan_dev
*vxlan
, *next
;
3244 LIST_HEAD(list_kill
);
3246 list_for_each_entry_safe(vxlan
, next
, &vn
->vxlan_list
, next
) {
3247 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
3249 /* In case we created vxlan device with carrier
3250 * and we loose the carrier due to module unload
3251 * we also need to remove vxlan device. In other
3252 * cases, it's not necessary and remote_ifindex
3253 * is 0 here, so no matches.
3255 if (dst
->remote_ifindex
== dev
->ifindex
)
3256 vxlan_dellink(vxlan
->dev
, &list_kill
);
3259 unregister_netdevice_many(&list_kill
);
3262 static int vxlan_netdevice_event(struct notifier_block
*unused
,
3263 unsigned long event
, void *ptr
)
3265 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3266 struct vxlan_net
*vn
= net_generic(dev_net(dev
), vxlan_net_id
);
3268 if (event
== NETDEV_UNREGISTER
)
3269 vxlan_handle_lowerdev_unregister(vn
, dev
);
3270 else if (event
== NETDEV_UDP_TUNNEL_PUSH_INFO
)
3271 vxlan_push_rx_ports(dev
);
3276 static struct notifier_block vxlan_notifier_block __read_mostly
= {
3277 .notifier_call
= vxlan_netdevice_event
,
3280 static __net_init
int vxlan_init_net(struct net
*net
)
3282 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
3285 INIT_LIST_HEAD(&vn
->vxlan_list
);
3286 spin_lock_init(&vn
->sock_lock
);
3288 for (h
= 0; h
< PORT_HASH_SIZE
; ++h
)
3289 INIT_HLIST_HEAD(&vn
->sock_list
[h
]);
3294 static void __net_exit
vxlan_exit_net(struct net
*net
)
3296 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
3297 struct vxlan_dev
*vxlan
, *next
;
3298 struct net_device
*dev
, *aux
;
3302 for_each_netdev_safe(net
, dev
, aux
)
3303 if (dev
->rtnl_link_ops
== &vxlan_link_ops
)
3304 unregister_netdevice_queue(dev
, &list
);
3306 list_for_each_entry_safe(vxlan
, next
, &vn
->vxlan_list
, next
) {
3307 /* If vxlan->dev is in the same netns, it has already been added
3308 * to the list by the previous loop.
3310 if (!net_eq(dev_net(vxlan
->dev
), net
)) {
3311 gro_cells_destroy(&vxlan
->gro_cells
);
3312 unregister_netdevice_queue(vxlan
->dev
, &list
);
3316 unregister_netdevice_many(&list
);
3320 static struct pernet_operations vxlan_net_ops
= {
3321 .init
= vxlan_init_net
,
3322 .exit
= vxlan_exit_net
,
3323 .id
= &vxlan_net_id
,
3324 .size
= sizeof(struct vxlan_net
),
3327 static int __init
vxlan_init_module(void)
3331 get_random_bytes(&vxlan_salt
, sizeof(vxlan_salt
));
3333 rc
= register_pernet_subsys(&vxlan_net_ops
);
3337 rc
= register_netdevice_notifier(&vxlan_notifier_block
);
3341 rc
= rtnl_link_register(&vxlan_link_ops
);
3347 unregister_netdevice_notifier(&vxlan_notifier_block
);
3349 unregister_pernet_subsys(&vxlan_net_ops
);
3353 late_initcall(vxlan_init_module
);
3355 static void __exit
vxlan_cleanup_module(void)
3357 rtnl_link_unregister(&vxlan_link_ops
);
3358 unregister_netdevice_notifier(&vxlan_notifier_block
);
3359 unregister_pernet_subsys(&vxlan_net_ops
);
3360 /* rcu_barrier() is called by netns */
3362 module_exit(vxlan_cleanup_module
);
3364 MODULE_LICENSE("GPL");
3365 MODULE_VERSION(VXLAN_VERSION
);
3366 MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
3367 MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
3368 MODULE_ALIAS_RTNL_LINK("vxlan");