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
;
102 static inline bool vxlan_collect_metadata(struct vxlan_sock
*vs
)
104 return vs
->flags
& VXLAN_F_COLLECT_METADATA
||
105 ip_tunnel_collect_metadata();
108 #if IS_ENABLED(CONFIG_IPV6)
110 bool vxlan_addr_equal(const union vxlan_addr
*a
, const union vxlan_addr
*b
)
112 if (a
->sa
.sa_family
!= b
->sa
.sa_family
)
114 if (a
->sa
.sa_family
== AF_INET6
)
115 return ipv6_addr_equal(&a
->sin6
.sin6_addr
, &b
->sin6
.sin6_addr
);
117 return a
->sin
.sin_addr
.s_addr
== b
->sin
.sin_addr
.s_addr
;
120 static inline bool vxlan_addr_any(const union vxlan_addr
*ipa
)
122 if (ipa
->sa
.sa_family
== AF_INET6
)
123 return ipv6_addr_any(&ipa
->sin6
.sin6_addr
);
125 return ipa
->sin
.sin_addr
.s_addr
== htonl(INADDR_ANY
);
128 static inline bool vxlan_addr_multicast(const union vxlan_addr
*ipa
)
130 if (ipa
->sa
.sa_family
== AF_INET6
)
131 return ipv6_addr_is_multicast(&ipa
->sin6
.sin6_addr
);
133 return IN_MULTICAST(ntohl(ipa
->sin
.sin_addr
.s_addr
));
136 static int vxlan_nla_get_addr(union vxlan_addr
*ip
, struct nlattr
*nla
)
138 if (nla_len(nla
) >= sizeof(struct in6_addr
)) {
139 ip
->sin6
.sin6_addr
= nla_get_in6_addr(nla
);
140 ip
->sa
.sa_family
= AF_INET6
;
142 } else if (nla_len(nla
) >= sizeof(__be32
)) {
143 ip
->sin
.sin_addr
.s_addr
= nla_get_in_addr(nla
);
144 ip
->sa
.sa_family
= AF_INET
;
147 return -EAFNOSUPPORT
;
151 static int vxlan_nla_put_addr(struct sk_buff
*skb
, int attr
,
152 const union vxlan_addr
*ip
)
154 if (ip
->sa
.sa_family
== AF_INET6
)
155 return nla_put_in6_addr(skb
, attr
, &ip
->sin6
.sin6_addr
);
157 return nla_put_in_addr(skb
, attr
, ip
->sin
.sin_addr
.s_addr
);
160 #else /* !CONFIG_IPV6 */
163 bool vxlan_addr_equal(const union vxlan_addr
*a
, const union vxlan_addr
*b
)
165 return a
->sin
.sin_addr
.s_addr
== b
->sin
.sin_addr
.s_addr
;
168 static inline bool vxlan_addr_any(const union vxlan_addr
*ipa
)
170 return ipa
->sin
.sin_addr
.s_addr
== htonl(INADDR_ANY
);
173 static inline bool vxlan_addr_multicast(const union vxlan_addr
*ipa
)
175 return IN_MULTICAST(ntohl(ipa
->sin
.sin_addr
.s_addr
));
178 static int vxlan_nla_get_addr(union vxlan_addr
*ip
, struct nlattr
*nla
)
180 if (nla_len(nla
) >= sizeof(struct in6_addr
)) {
181 return -EAFNOSUPPORT
;
182 } else if (nla_len(nla
) >= sizeof(__be32
)) {
183 ip
->sin
.sin_addr
.s_addr
= nla_get_in_addr(nla
);
184 ip
->sa
.sa_family
= AF_INET
;
187 return -EAFNOSUPPORT
;
191 static int vxlan_nla_put_addr(struct sk_buff
*skb
, int attr
,
192 const union vxlan_addr
*ip
)
194 return nla_put_in_addr(skb
, attr
, ip
->sin
.sin_addr
.s_addr
);
198 /* Virtual Network hash table head */
199 static inline struct hlist_head
*vni_head(struct vxlan_sock
*vs
, __be32 vni
)
201 return &vs
->vni_list
[hash_32((__force u32
)vni
, VNI_HASH_BITS
)];
204 /* Socket hash table head */
205 static inline struct hlist_head
*vs_head(struct net
*net
, __be16 port
)
207 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
209 return &vn
->sock_list
[hash_32(ntohs(port
), PORT_HASH_BITS
)];
212 /* First remote destination for a forwarding entry.
213 * Guaranteed to be non-NULL because remotes are never deleted.
215 static inline struct vxlan_rdst
*first_remote_rcu(struct vxlan_fdb
*fdb
)
217 return list_entry_rcu(fdb
->remotes
.next
, struct vxlan_rdst
, list
);
220 static inline struct vxlan_rdst
*first_remote_rtnl(struct vxlan_fdb
*fdb
)
222 return list_first_entry(&fdb
->remotes
, struct vxlan_rdst
, list
);
225 /* Find VXLAN socket based on network namespace, address family and UDP port
226 * and enabled unshareable flags.
228 static struct vxlan_sock
*vxlan_find_sock(struct net
*net
, sa_family_t family
,
229 __be16 port
, u32 flags
)
231 struct vxlan_sock
*vs
;
233 flags
&= VXLAN_F_RCV_FLAGS
;
235 hlist_for_each_entry_rcu(vs
, vs_head(net
, port
), hlist
) {
236 if (inet_sk(vs
->sock
->sk
)->inet_sport
== port
&&
237 vxlan_get_sk_family(vs
) == family
&&
244 static struct vxlan_dev
*vxlan_vs_find_vni(struct vxlan_sock
*vs
, __be32 vni
)
246 struct vxlan_dev
*vxlan
;
248 /* For flow based devices, map all packets to VNI 0 */
249 if (vs
->flags
& VXLAN_F_COLLECT_METADATA
)
252 hlist_for_each_entry_rcu(vxlan
, vni_head(vs
, vni
), hlist
) {
253 if (vxlan
->default_dst
.remote_vni
== vni
)
260 /* Look up VNI in a per net namespace table */
261 static struct vxlan_dev
*vxlan_find_vni(struct net
*net
, __be32 vni
,
262 sa_family_t family
, __be16 port
,
265 struct vxlan_sock
*vs
;
267 vs
= vxlan_find_sock(net
, family
, port
, flags
);
271 return vxlan_vs_find_vni(vs
, vni
);
274 /* Fill in neighbour message in skbuff. */
275 static int vxlan_fdb_info(struct sk_buff
*skb
, struct vxlan_dev
*vxlan
,
276 const struct vxlan_fdb
*fdb
,
277 u32 portid
, u32 seq
, int type
, unsigned int flags
,
278 const struct vxlan_rdst
*rdst
)
280 unsigned long now
= jiffies
;
281 struct nda_cacheinfo ci
;
282 struct nlmsghdr
*nlh
;
284 bool send_ip
, send_eth
;
286 nlh
= nlmsg_put(skb
, portid
, seq
, type
, sizeof(*ndm
), flags
);
290 ndm
= nlmsg_data(nlh
);
291 memset(ndm
, 0, sizeof(*ndm
));
293 send_eth
= send_ip
= true;
295 if (type
== RTM_GETNEIGH
) {
296 ndm
->ndm_family
= AF_INET
;
297 send_ip
= !vxlan_addr_any(&rdst
->remote_ip
);
298 send_eth
= !is_zero_ether_addr(fdb
->eth_addr
);
300 ndm
->ndm_family
= AF_BRIDGE
;
301 ndm
->ndm_state
= fdb
->state
;
302 ndm
->ndm_ifindex
= vxlan
->dev
->ifindex
;
303 ndm
->ndm_flags
= fdb
->flags
;
304 ndm
->ndm_type
= RTN_UNICAST
;
306 if (!net_eq(dev_net(vxlan
->dev
), vxlan
->net
) &&
307 nla_put_s32(skb
, NDA_LINK_NETNSID
,
308 peernet2id_alloc(dev_net(vxlan
->dev
), vxlan
->net
)))
309 goto nla_put_failure
;
311 if (send_eth
&& nla_put(skb
, NDA_LLADDR
, ETH_ALEN
, &fdb
->eth_addr
))
312 goto nla_put_failure
;
314 if (send_ip
&& vxlan_nla_put_addr(skb
, NDA_DST
, &rdst
->remote_ip
))
315 goto nla_put_failure
;
317 if (rdst
->remote_port
&& rdst
->remote_port
!= vxlan
->cfg
.dst_port
&&
318 nla_put_be16(skb
, NDA_PORT
, rdst
->remote_port
))
319 goto nla_put_failure
;
320 if (rdst
->remote_vni
!= vxlan
->default_dst
.remote_vni
&&
321 nla_put_u32(skb
, NDA_VNI
, be32_to_cpu(rdst
->remote_vni
)))
322 goto nla_put_failure
;
323 if (rdst
->remote_ifindex
&&
324 nla_put_u32(skb
, NDA_IFINDEX
, rdst
->remote_ifindex
))
325 goto nla_put_failure
;
327 ci
.ndm_used
= jiffies_to_clock_t(now
- fdb
->used
);
328 ci
.ndm_confirmed
= 0;
329 ci
.ndm_updated
= jiffies_to_clock_t(now
- fdb
->updated
);
332 if (nla_put(skb
, NDA_CACHEINFO
, sizeof(ci
), &ci
))
333 goto nla_put_failure
;
339 nlmsg_cancel(skb
, nlh
);
343 static inline size_t vxlan_nlmsg_size(void)
345 return NLMSG_ALIGN(sizeof(struct ndmsg
))
346 + nla_total_size(ETH_ALEN
) /* NDA_LLADDR */
347 + nla_total_size(sizeof(struct in6_addr
)) /* NDA_DST */
348 + nla_total_size(sizeof(__be16
)) /* NDA_PORT */
349 + nla_total_size(sizeof(__be32
)) /* NDA_VNI */
350 + nla_total_size(sizeof(__u32
)) /* NDA_IFINDEX */
351 + nla_total_size(sizeof(__s32
)) /* NDA_LINK_NETNSID */
352 + nla_total_size(sizeof(struct nda_cacheinfo
));
355 static void vxlan_fdb_notify(struct vxlan_dev
*vxlan
, struct vxlan_fdb
*fdb
,
356 struct vxlan_rdst
*rd
, int type
)
358 struct net
*net
= dev_net(vxlan
->dev
);
362 skb
= nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC
);
366 err
= vxlan_fdb_info(skb
, vxlan
, fdb
, 0, 0, type
, 0, rd
);
368 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
369 WARN_ON(err
== -EMSGSIZE
);
374 rtnl_notify(skb
, net
, 0, RTNLGRP_NEIGH
, NULL
, GFP_ATOMIC
);
378 rtnl_set_sk_err(net
, RTNLGRP_NEIGH
, err
);
381 static void vxlan_ip_miss(struct net_device
*dev
, union vxlan_addr
*ipa
)
383 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
384 struct vxlan_fdb f
= {
387 struct vxlan_rdst remote
= {
388 .remote_ip
= *ipa
, /* goes to NDA_DST */
389 .remote_vni
= cpu_to_be32(VXLAN_N_VID
),
392 vxlan_fdb_notify(vxlan
, &f
, &remote
, RTM_GETNEIGH
);
395 static void vxlan_fdb_miss(struct vxlan_dev
*vxlan
, const u8 eth_addr
[ETH_ALEN
])
397 struct vxlan_fdb f
= {
400 struct vxlan_rdst remote
= { };
402 memcpy(f
.eth_addr
, eth_addr
, ETH_ALEN
);
404 vxlan_fdb_notify(vxlan
, &f
, &remote
, RTM_GETNEIGH
);
407 /* Hash Ethernet address */
408 static u32
eth_hash(const unsigned char *addr
)
410 u64 value
= get_unaligned((u64
*)addr
);
412 /* only want 6 bytes */
418 return hash_64(value
, FDB_HASH_BITS
);
421 /* Hash chain to use given mac address */
422 static inline struct hlist_head
*vxlan_fdb_head(struct vxlan_dev
*vxlan
,
425 return &vxlan
->fdb_head
[eth_hash(mac
)];
428 /* Look up Ethernet address in forwarding table */
429 static struct vxlan_fdb
*__vxlan_find_mac(struct vxlan_dev
*vxlan
,
432 struct hlist_head
*head
= vxlan_fdb_head(vxlan
, mac
);
435 hlist_for_each_entry_rcu(f
, head
, hlist
) {
436 if (ether_addr_equal(mac
, f
->eth_addr
))
443 static struct vxlan_fdb
*vxlan_find_mac(struct vxlan_dev
*vxlan
,
448 f
= __vxlan_find_mac(vxlan
, mac
);
455 /* caller should hold vxlan->hash_lock */
456 static struct vxlan_rdst
*vxlan_fdb_find_rdst(struct vxlan_fdb
*f
,
457 union vxlan_addr
*ip
, __be16 port
,
458 __be32 vni
, __u32 ifindex
)
460 struct vxlan_rdst
*rd
;
462 list_for_each_entry(rd
, &f
->remotes
, list
) {
463 if (vxlan_addr_equal(&rd
->remote_ip
, ip
) &&
464 rd
->remote_port
== port
&&
465 rd
->remote_vni
== vni
&&
466 rd
->remote_ifindex
== ifindex
)
473 /* Replace destination of unicast mac */
474 static int vxlan_fdb_replace(struct vxlan_fdb
*f
,
475 union vxlan_addr
*ip
, __be16 port
, __be32 vni
,
478 struct vxlan_rdst
*rd
;
480 rd
= vxlan_fdb_find_rdst(f
, ip
, port
, vni
, ifindex
);
484 rd
= list_first_entry_or_null(&f
->remotes
, struct vxlan_rdst
, list
);
488 dst_cache_reset(&rd
->dst_cache
);
490 rd
->remote_port
= port
;
491 rd
->remote_vni
= vni
;
492 rd
->remote_ifindex
= ifindex
;
496 /* Add/update destinations for multicast */
497 static int vxlan_fdb_append(struct vxlan_fdb
*f
,
498 union vxlan_addr
*ip
, __be16 port
, __be32 vni
,
499 __u32 ifindex
, struct vxlan_rdst
**rdp
)
501 struct vxlan_rdst
*rd
;
503 rd
= vxlan_fdb_find_rdst(f
, ip
, port
, vni
, ifindex
);
507 rd
= kmalloc(sizeof(*rd
), GFP_ATOMIC
);
511 if (dst_cache_init(&rd
->dst_cache
, GFP_ATOMIC
)) {
517 rd
->remote_port
= port
;
518 rd
->remote_vni
= vni
;
519 rd
->remote_ifindex
= ifindex
;
521 list_add_tail_rcu(&rd
->list
, &f
->remotes
);
527 static struct vxlanhdr
*vxlan_gro_remcsum(struct sk_buff
*skb
,
529 struct vxlanhdr
*vh
, size_t hdrlen
,
531 struct gro_remcsum
*grc
,
534 size_t start
, offset
;
536 if (skb
->remcsum_offload
)
539 if (!NAPI_GRO_CB(skb
)->csum_valid
)
542 start
= vxlan_rco_start(vni_field
);
543 offset
= start
+ vxlan_rco_offset(vni_field
);
545 vh
= skb_gro_remcsum_process(skb
, (void *)vh
, off
, hdrlen
,
546 start
, offset
, grc
, nopartial
);
548 skb
->remcsum_offload
= 1;
553 static struct sk_buff
**vxlan_gro_receive(struct sock
*sk
,
554 struct sk_buff
**head
,
557 struct sk_buff
*p
, **pp
= NULL
;
558 struct vxlanhdr
*vh
, *vh2
;
559 unsigned int hlen
, off_vx
;
561 struct vxlan_sock
*vs
= rcu_dereference_sk_user_data(sk
);
563 struct gro_remcsum grc
;
565 skb_gro_remcsum_init(&grc
);
567 off_vx
= skb_gro_offset(skb
);
568 hlen
= off_vx
+ sizeof(*vh
);
569 vh
= skb_gro_header_fast(skb
, off_vx
);
570 if (skb_gro_header_hard(skb
, hlen
)) {
571 vh
= skb_gro_header_slow(skb
, hlen
, off_vx
);
576 skb_gro_postpull_rcsum(skb
, vh
, sizeof(struct vxlanhdr
));
578 flags
= vh
->vx_flags
;
580 if ((flags
& VXLAN_HF_RCO
) && (vs
->flags
& VXLAN_F_REMCSUM_RX
)) {
581 vh
= vxlan_gro_remcsum(skb
, off_vx
, vh
, sizeof(struct vxlanhdr
),
584 VXLAN_F_REMCSUM_NOPARTIAL
));
590 skb_gro_pull(skb
, sizeof(struct vxlanhdr
)); /* pull vxlan header */
592 for (p
= *head
; p
; p
= p
->next
) {
593 if (!NAPI_GRO_CB(p
)->same_flow
)
596 vh2
= (struct vxlanhdr
*)(p
->data
+ off_vx
);
597 if (vh
->vx_flags
!= vh2
->vx_flags
||
598 vh
->vx_vni
!= vh2
->vx_vni
) {
599 NAPI_GRO_CB(p
)->same_flow
= 0;
604 pp
= eth_gro_receive(head
, skb
);
608 skb_gro_remcsum_cleanup(skb
, &grc
);
609 NAPI_GRO_CB(skb
)->flush
|= flush
;
614 static int vxlan_gro_complete(struct sock
*sk
, struct sk_buff
*skb
, int nhoff
)
616 udp_tunnel_gro_complete(skb
, nhoff
);
618 return eth_gro_complete(skb
, nhoff
+ sizeof(struct vxlanhdr
));
621 /* Notify netdevs that UDP port started listening */
622 static void vxlan_notify_add_rx_port(struct vxlan_sock
*vs
)
624 struct net_device
*dev
;
625 struct sock
*sk
= vs
->sock
->sk
;
626 struct net
*net
= sock_net(sk
);
627 sa_family_t sa_family
= vxlan_get_sk_family(vs
);
628 __be16 port
= inet_sk(sk
)->inet_sport
;
631 for_each_netdev_rcu(net
, dev
) {
632 if (dev
->netdev_ops
->ndo_add_vxlan_port
)
633 dev
->netdev_ops
->ndo_add_vxlan_port(dev
, sa_family
,
639 /* Notify netdevs that UDP port is no more listening */
640 static void vxlan_notify_del_rx_port(struct vxlan_sock
*vs
)
642 struct net_device
*dev
;
643 struct sock
*sk
= vs
->sock
->sk
;
644 struct net
*net
= sock_net(sk
);
645 sa_family_t sa_family
= vxlan_get_sk_family(vs
);
646 __be16 port
= inet_sk(sk
)->inet_sport
;
649 for_each_netdev_rcu(net
, dev
) {
650 if (dev
->netdev_ops
->ndo_del_vxlan_port
)
651 dev
->netdev_ops
->ndo_del_vxlan_port(dev
, sa_family
,
657 /* Add new entry to forwarding table -- assumes lock held */
658 static int vxlan_fdb_create(struct vxlan_dev
*vxlan
,
659 const u8
*mac
, union vxlan_addr
*ip
,
660 __u16 state
, __u16 flags
,
661 __be16 port
, __be32 vni
, __u32 ifindex
,
664 struct vxlan_rdst
*rd
= NULL
;
668 f
= __vxlan_find_mac(vxlan
, mac
);
670 if (flags
& NLM_F_EXCL
) {
671 netdev_dbg(vxlan
->dev
,
672 "lost race to create %pM\n", mac
);
675 if (f
->state
!= state
) {
677 f
->updated
= jiffies
;
680 if (f
->flags
!= ndm_flags
) {
681 f
->flags
= ndm_flags
;
682 f
->updated
= jiffies
;
685 if ((flags
& NLM_F_REPLACE
)) {
686 /* Only change unicasts */
687 if (!(is_multicast_ether_addr(f
->eth_addr
) ||
688 is_zero_ether_addr(f
->eth_addr
))) {
689 notify
|= vxlan_fdb_replace(f
, ip
, port
, vni
,
694 if ((flags
& NLM_F_APPEND
) &&
695 (is_multicast_ether_addr(f
->eth_addr
) ||
696 is_zero_ether_addr(f
->eth_addr
))) {
697 int rc
= vxlan_fdb_append(f
, ip
, port
, vni
, ifindex
,
705 if (!(flags
& NLM_F_CREATE
))
708 if (vxlan
->cfg
.addrmax
&&
709 vxlan
->addrcnt
>= vxlan
->cfg
.addrmax
)
712 /* Disallow replace to add a multicast entry */
713 if ((flags
& NLM_F_REPLACE
) &&
714 (is_multicast_ether_addr(mac
) || is_zero_ether_addr(mac
)))
717 netdev_dbg(vxlan
->dev
, "add %pM -> %pIS\n", mac
, ip
);
718 f
= kmalloc(sizeof(*f
), GFP_ATOMIC
);
724 f
->flags
= ndm_flags
;
725 f
->updated
= f
->used
= jiffies
;
726 INIT_LIST_HEAD(&f
->remotes
);
727 memcpy(f
->eth_addr
, mac
, ETH_ALEN
);
729 vxlan_fdb_append(f
, ip
, port
, vni
, ifindex
, &rd
);
732 hlist_add_head_rcu(&f
->hlist
,
733 vxlan_fdb_head(vxlan
, mac
));
738 rd
= first_remote_rtnl(f
);
739 vxlan_fdb_notify(vxlan
, f
, rd
, RTM_NEWNEIGH
);
745 static void vxlan_fdb_free(struct rcu_head
*head
)
747 struct vxlan_fdb
*f
= container_of(head
, struct vxlan_fdb
, rcu
);
748 struct vxlan_rdst
*rd
, *nd
;
750 list_for_each_entry_safe(rd
, nd
, &f
->remotes
, list
) {
751 dst_cache_destroy(&rd
->dst_cache
);
757 static void vxlan_fdb_destroy(struct vxlan_dev
*vxlan
, struct vxlan_fdb
*f
)
759 netdev_dbg(vxlan
->dev
,
760 "delete %pM\n", f
->eth_addr
);
763 vxlan_fdb_notify(vxlan
, f
, first_remote_rtnl(f
), RTM_DELNEIGH
);
765 hlist_del_rcu(&f
->hlist
);
766 call_rcu(&f
->rcu
, vxlan_fdb_free
);
769 static int vxlan_fdb_parse(struct nlattr
*tb
[], struct vxlan_dev
*vxlan
,
770 union vxlan_addr
*ip
, __be16
*port
, __be32
*vni
,
773 struct net
*net
= dev_net(vxlan
->dev
);
777 err
= vxlan_nla_get_addr(ip
, tb
[NDA_DST
]);
781 union vxlan_addr
*remote
= &vxlan
->default_dst
.remote_ip
;
782 if (remote
->sa
.sa_family
== AF_INET
) {
783 ip
->sin
.sin_addr
.s_addr
= htonl(INADDR_ANY
);
784 ip
->sa
.sa_family
= AF_INET
;
785 #if IS_ENABLED(CONFIG_IPV6)
787 ip
->sin6
.sin6_addr
= in6addr_any
;
788 ip
->sa
.sa_family
= AF_INET6
;
794 if (nla_len(tb
[NDA_PORT
]) != sizeof(__be16
))
796 *port
= nla_get_be16(tb
[NDA_PORT
]);
798 *port
= vxlan
->cfg
.dst_port
;
802 if (nla_len(tb
[NDA_VNI
]) != sizeof(u32
))
804 *vni
= cpu_to_be32(nla_get_u32(tb
[NDA_VNI
]));
806 *vni
= vxlan
->default_dst
.remote_vni
;
809 if (tb
[NDA_IFINDEX
]) {
810 struct net_device
*tdev
;
812 if (nla_len(tb
[NDA_IFINDEX
]) != sizeof(u32
))
814 *ifindex
= nla_get_u32(tb
[NDA_IFINDEX
]);
815 tdev
= __dev_get_by_index(net
, *ifindex
);
817 return -EADDRNOTAVAIL
;
825 /* Add static entry (via netlink) */
826 static int vxlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
827 struct net_device
*dev
,
828 const unsigned char *addr
, u16 vid
, u16 flags
)
830 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
831 /* struct net *net = dev_net(vxlan->dev); */
838 if (!(ndm
->ndm_state
& (NUD_PERMANENT
|NUD_REACHABLE
))) {
839 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
844 if (tb
[NDA_DST
] == NULL
)
847 err
= vxlan_fdb_parse(tb
, vxlan
, &ip
, &port
, &vni
, &ifindex
);
851 if (vxlan
->default_dst
.remote_ip
.sa
.sa_family
!= ip
.sa
.sa_family
)
852 return -EAFNOSUPPORT
;
854 spin_lock_bh(&vxlan
->hash_lock
);
855 err
= vxlan_fdb_create(vxlan
, addr
, &ip
, ndm
->ndm_state
, flags
,
856 port
, vni
, ifindex
, ndm
->ndm_flags
);
857 spin_unlock_bh(&vxlan
->hash_lock
);
862 /* Delete entry (via netlink) */
863 static int vxlan_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
864 struct net_device
*dev
,
865 const unsigned char *addr
, u16 vid
)
867 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
869 struct vxlan_rdst
*rd
= NULL
;
876 err
= vxlan_fdb_parse(tb
, vxlan
, &ip
, &port
, &vni
, &ifindex
);
882 spin_lock_bh(&vxlan
->hash_lock
);
883 f
= vxlan_find_mac(vxlan
, addr
);
887 if (!vxlan_addr_any(&ip
)) {
888 rd
= vxlan_fdb_find_rdst(f
, &ip
, port
, vni
, ifindex
);
895 /* remove a destination if it's not the only one on the list,
896 * otherwise destroy the fdb entry
898 if (rd
&& !list_is_singular(&f
->remotes
)) {
899 list_del_rcu(&rd
->list
);
900 vxlan_fdb_notify(vxlan
, f
, rd
, RTM_DELNEIGH
);
905 vxlan_fdb_destroy(vxlan
, f
);
908 spin_unlock_bh(&vxlan
->hash_lock
);
913 /* Dump forwarding table */
914 static int vxlan_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
915 struct net_device
*dev
,
916 struct net_device
*filter_dev
, int idx
)
918 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
921 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
925 hlist_for_each_entry_rcu(f
, &vxlan
->fdb_head
[h
], hlist
) {
926 struct vxlan_rdst
*rd
;
928 list_for_each_entry_rcu(rd
, &f
->remotes
, list
) {
929 if (idx
< cb
->args
[0])
932 err
= vxlan_fdb_info(skb
, vxlan
, f
,
933 NETLINK_CB(cb
->skb
).portid
,
950 /* Watch incoming packets to learn mapping between Ethernet address
951 * and Tunnel endpoint.
952 * Return true if packet is bogus and should be dropped.
954 static bool vxlan_snoop(struct net_device
*dev
,
955 union vxlan_addr
*src_ip
, const u8
*src_mac
)
957 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
960 f
= vxlan_find_mac(vxlan
, src_mac
);
962 struct vxlan_rdst
*rdst
= first_remote_rcu(f
);
964 if (likely(vxlan_addr_equal(&rdst
->remote_ip
, src_ip
)))
967 /* Don't migrate static entries, drop packets */
968 if (f
->state
& NUD_NOARP
)
973 "%pM migrated from %pIS to %pIS\n",
974 src_mac
, &rdst
->remote_ip
.sa
, &src_ip
->sa
);
976 rdst
->remote_ip
= *src_ip
;
977 f
->updated
= jiffies
;
978 vxlan_fdb_notify(vxlan
, f
, rdst
, RTM_NEWNEIGH
);
980 /* learned new entry */
981 spin_lock(&vxlan
->hash_lock
);
983 /* close off race between vxlan_flush and incoming packets */
984 if (netif_running(dev
))
985 vxlan_fdb_create(vxlan
, src_mac
, src_ip
,
987 NLM_F_EXCL
|NLM_F_CREATE
,
989 vxlan
->default_dst
.remote_vni
,
991 spin_unlock(&vxlan
->hash_lock
);
997 /* See if multicast group is already in use by other ID */
998 static bool vxlan_group_used(struct vxlan_net
*vn
, struct vxlan_dev
*dev
)
1000 struct vxlan_dev
*vxlan
;
1001 unsigned short family
= dev
->default_dst
.remote_ip
.sa
.sa_family
;
1003 /* The vxlan_sock is only used by dev, leaving group has
1004 * no effect on other vxlan devices.
1006 if (family
== AF_INET
&& dev
->vn4_sock
&&
1007 atomic_read(&dev
->vn4_sock
->refcnt
) == 1)
1009 #if IS_ENABLED(CONFIG_IPV6)
1010 if (family
== AF_INET6
&& dev
->vn6_sock
&&
1011 atomic_read(&dev
->vn6_sock
->refcnt
) == 1)
1015 list_for_each_entry(vxlan
, &vn
->vxlan_list
, next
) {
1016 if (!netif_running(vxlan
->dev
) || vxlan
== dev
)
1019 if (family
== AF_INET
&& vxlan
->vn4_sock
!= dev
->vn4_sock
)
1021 #if IS_ENABLED(CONFIG_IPV6)
1022 if (family
== AF_INET6
&& vxlan
->vn6_sock
!= dev
->vn6_sock
)
1026 if (!vxlan_addr_equal(&vxlan
->default_dst
.remote_ip
,
1027 &dev
->default_dst
.remote_ip
))
1030 if (vxlan
->default_dst
.remote_ifindex
!=
1031 dev
->default_dst
.remote_ifindex
)
1040 static bool __vxlan_sock_release_prep(struct vxlan_sock
*vs
)
1042 struct vxlan_net
*vn
;
1046 if (!atomic_dec_and_test(&vs
->refcnt
))
1049 vn
= net_generic(sock_net(vs
->sock
->sk
), vxlan_net_id
);
1050 spin_lock(&vn
->sock_lock
);
1051 hlist_del_rcu(&vs
->hlist
);
1052 vxlan_notify_del_rx_port(vs
);
1053 spin_unlock(&vn
->sock_lock
);
1058 static void vxlan_sock_release(struct vxlan_dev
*vxlan
)
1060 bool ipv4
= __vxlan_sock_release_prep(vxlan
->vn4_sock
);
1061 #if IS_ENABLED(CONFIG_IPV6)
1062 bool ipv6
= __vxlan_sock_release_prep(vxlan
->vn6_sock
);
1068 udp_tunnel_sock_release(vxlan
->vn4_sock
->sock
);
1069 kfree(vxlan
->vn4_sock
);
1072 #if IS_ENABLED(CONFIG_IPV6)
1074 udp_tunnel_sock_release(vxlan
->vn6_sock
->sock
);
1075 kfree(vxlan
->vn6_sock
);
1080 /* Update multicast group membership when first VNI on
1081 * multicast address is brought up
1083 static int vxlan_igmp_join(struct vxlan_dev
*vxlan
)
1086 union vxlan_addr
*ip
= &vxlan
->default_dst
.remote_ip
;
1087 int ifindex
= vxlan
->default_dst
.remote_ifindex
;
1090 if (ip
->sa
.sa_family
== AF_INET
) {
1091 struct ip_mreqn mreq
= {
1092 .imr_multiaddr
.s_addr
= ip
->sin
.sin_addr
.s_addr
,
1093 .imr_ifindex
= ifindex
,
1096 sk
= vxlan
->vn4_sock
->sock
->sk
;
1098 ret
= ip_mc_join_group(sk
, &mreq
);
1100 #if IS_ENABLED(CONFIG_IPV6)
1102 sk
= vxlan
->vn6_sock
->sock
->sk
;
1104 ret
= ipv6_stub
->ipv6_sock_mc_join(sk
, ifindex
,
1105 &ip
->sin6
.sin6_addr
);
1113 /* Inverse of vxlan_igmp_join when last VNI is brought down */
1114 static int vxlan_igmp_leave(struct vxlan_dev
*vxlan
)
1117 union vxlan_addr
*ip
= &vxlan
->default_dst
.remote_ip
;
1118 int ifindex
= vxlan
->default_dst
.remote_ifindex
;
1121 if (ip
->sa
.sa_family
== AF_INET
) {
1122 struct ip_mreqn mreq
= {
1123 .imr_multiaddr
.s_addr
= ip
->sin
.sin_addr
.s_addr
,
1124 .imr_ifindex
= ifindex
,
1127 sk
= vxlan
->vn4_sock
->sock
->sk
;
1129 ret
= ip_mc_leave_group(sk
, &mreq
);
1131 #if IS_ENABLED(CONFIG_IPV6)
1133 sk
= vxlan
->vn6_sock
->sock
->sk
;
1135 ret
= ipv6_stub
->ipv6_sock_mc_drop(sk
, ifindex
,
1136 &ip
->sin6
.sin6_addr
);
1144 static bool vxlan_remcsum(struct vxlanhdr
*unparsed
,
1145 struct sk_buff
*skb
, u32 vxflags
)
1147 size_t start
, offset
;
1149 if (!(unparsed
->vx_flags
& VXLAN_HF_RCO
) || skb
->remcsum_offload
)
1152 start
= vxlan_rco_start(unparsed
->vx_vni
);
1153 offset
= start
+ vxlan_rco_offset(unparsed
->vx_vni
);
1155 if (!pskb_may_pull(skb
, offset
+ sizeof(u16
)))
1158 skb_remcsum_process(skb
, (void *)(vxlan_hdr(skb
) + 1), start
, offset
,
1159 !!(vxflags
& VXLAN_F_REMCSUM_NOPARTIAL
));
1161 unparsed
->vx_flags
&= ~VXLAN_HF_RCO
;
1162 unparsed
->vx_vni
&= VXLAN_VNI_MASK
;
1166 static void vxlan_parse_gbp_hdr(struct vxlanhdr
*unparsed
,
1167 struct sk_buff
*skb
, u32 vxflags
,
1168 struct vxlan_metadata
*md
)
1170 struct vxlanhdr_gbp
*gbp
= (struct vxlanhdr_gbp
*)unparsed
;
1171 struct metadata_dst
*tun_dst
;
1173 if (!(unparsed
->vx_flags
& VXLAN_HF_GBP
))
1176 md
->gbp
= ntohs(gbp
->policy_id
);
1178 tun_dst
= (struct metadata_dst
*)skb_dst(skb
);
1180 tun_dst
->u
.tun_info
.key
.tun_flags
|= TUNNEL_VXLAN_OPT
;
1181 tun_dst
->u
.tun_info
.options_len
= sizeof(*md
);
1183 if (gbp
->dont_learn
)
1184 md
->gbp
|= VXLAN_GBP_DONT_LEARN
;
1186 if (gbp
->policy_applied
)
1187 md
->gbp
|= VXLAN_GBP_POLICY_APPLIED
;
1189 /* In flow-based mode, GBP is carried in dst_metadata */
1190 if (!(vxflags
& VXLAN_F_COLLECT_METADATA
))
1191 skb
->mark
= md
->gbp
;
1193 unparsed
->vx_flags
&= ~VXLAN_GBP_USED_BITS
;
1196 static bool vxlan_parse_gpe_hdr(struct vxlanhdr
*unparsed
,
1198 struct sk_buff
*skb
, u32 vxflags
)
1200 struct vxlanhdr_gpe
*gpe
= (struct vxlanhdr_gpe
*)unparsed
;
1202 /* Need to have Next Protocol set for interfaces in GPE mode. */
1203 if (!gpe
->np_applied
)
1205 /* "The initial version is 0. If a receiver does not support the
1206 * version indicated it MUST drop the packet.
1208 if (gpe
->version
!= 0)
1210 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1211 * processing MUST occur." However, we don't implement OAM
1212 * processing, thus drop the packet.
1217 switch (gpe
->next_protocol
) {
1218 case VXLAN_GPE_NP_IPV4
:
1219 *protocol
= htons(ETH_P_IP
);
1221 case VXLAN_GPE_NP_IPV6
:
1222 *protocol
= htons(ETH_P_IPV6
);
1224 case VXLAN_GPE_NP_ETHERNET
:
1225 *protocol
= htons(ETH_P_TEB
);
1231 unparsed
->vx_flags
&= ~VXLAN_GPE_USED_BITS
;
1235 static bool vxlan_set_mac(struct vxlan_dev
*vxlan
,
1236 struct vxlan_sock
*vs
,
1237 struct sk_buff
*skb
)
1239 union vxlan_addr saddr
;
1241 skb_reset_mac_header(skb
);
1242 skb
->protocol
= eth_type_trans(skb
, vxlan
->dev
);
1243 skb_postpull_rcsum(skb
, eth_hdr(skb
), ETH_HLEN
);
1245 /* Ignore packet loops (and multicast echo) */
1246 if (ether_addr_equal(eth_hdr(skb
)->h_source
, vxlan
->dev
->dev_addr
))
1249 /* Get address from the outer IP header */
1250 if (vxlan_get_sk_family(vs
) == AF_INET
) {
1251 saddr
.sin
.sin_addr
.s_addr
= ip_hdr(skb
)->saddr
;
1252 saddr
.sa
.sa_family
= AF_INET
;
1253 #if IS_ENABLED(CONFIG_IPV6)
1255 saddr
.sin6
.sin6_addr
= ipv6_hdr(skb
)->saddr
;
1256 saddr
.sa
.sa_family
= AF_INET6
;
1260 if ((vxlan
->flags
& VXLAN_F_LEARN
) &&
1261 vxlan_snoop(skb
->dev
, &saddr
, eth_hdr(skb
)->h_source
))
1267 static bool vxlan_ecn_decapsulate(struct vxlan_sock
*vs
, void *oiph
,
1268 struct sk_buff
*skb
)
1272 if (vxlan_get_sk_family(vs
) == AF_INET
)
1273 err
= IP_ECN_decapsulate(oiph
, skb
);
1274 #if IS_ENABLED(CONFIG_IPV6)
1276 err
= IP6_ECN_decapsulate(oiph
, skb
);
1279 if (unlikely(err
) && log_ecn_error
) {
1280 if (vxlan_get_sk_family(vs
) == AF_INET
)
1281 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1282 &((struct iphdr
*)oiph
)->saddr
,
1283 ((struct iphdr
*)oiph
)->tos
);
1285 net_info_ratelimited("non-ECT from %pI6\n",
1286 &((struct ipv6hdr
*)oiph
)->saddr
);
1291 /* Callback from net/ipv4/udp.c to receive packets */
1292 static int vxlan_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1294 struct pcpu_sw_netstats
*stats
;
1295 struct vxlan_dev
*vxlan
;
1296 struct vxlan_sock
*vs
;
1297 struct vxlanhdr unparsed
;
1298 struct vxlan_metadata _md
;
1299 struct vxlan_metadata
*md
= &_md
;
1300 __be16 protocol
= htons(ETH_P_TEB
);
1301 bool raw_proto
= false;
1304 /* Need UDP and VXLAN header to be present */
1305 if (!pskb_may_pull(skb
, VXLAN_HLEN
))
1308 unparsed
= *vxlan_hdr(skb
);
1309 /* VNI flag always required to be set */
1310 if (!(unparsed
.vx_flags
& VXLAN_HF_VNI
)) {
1311 netdev_dbg(skb
->dev
, "invalid vxlan flags=%#x vni=%#x\n",
1312 ntohl(vxlan_hdr(skb
)->vx_flags
),
1313 ntohl(vxlan_hdr(skb
)->vx_vni
));
1314 /* Return non vxlan pkt */
1317 unparsed
.vx_flags
&= ~VXLAN_HF_VNI
;
1318 unparsed
.vx_vni
&= ~VXLAN_VNI_MASK
;
1320 vs
= rcu_dereference_sk_user_data(sk
);
1324 vxlan
= vxlan_vs_find_vni(vs
, vxlan_vni(vxlan_hdr(skb
)->vx_vni
));
1328 /* For backwards compatibility, only allow reserved fields to be
1329 * used by VXLAN extensions if explicitly requested.
1331 if (vs
->flags
& VXLAN_F_GPE
) {
1332 if (!vxlan_parse_gpe_hdr(&unparsed
, &protocol
, skb
, vs
->flags
))
1337 if (__iptunnel_pull_header(skb
, VXLAN_HLEN
, protocol
, raw_proto
,
1338 !net_eq(vxlan
->net
, dev_net(vxlan
->dev
))))
1341 if (vxlan_collect_metadata(vs
)) {
1342 __be32 vni
= vxlan_vni(vxlan_hdr(skb
)->vx_vni
);
1343 struct metadata_dst
*tun_dst
;
1345 tun_dst
= udp_tun_rx_dst(skb
, vxlan_get_sk_family(vs
), TUNNEL_KEY
,
1346 vxlan_vni_to_tun_id(vni
), sizeof(*md
));
1351 md
= ip_tunnel_info_opts(&tun_dst
->u
.tun_info
);
1353 skb_dst_set(skb
, (struct dst_entry
*)tun_dst
);
1355 memset(md
, 0, sizeof(*md
));
1358 if (vs
->flags
& VXLAN_F_REMCSUM_RX
)
1359 if (!vxlan_remcsum(&unparsed
, skb
, vs
->flags
))
1361 if (vs
->flags
& VXLAN_F_GBP
)
1362 vxlan_parse_gbp_hdr(&unparsed
, skb
, vs
->flags
, md
);
1363 /* Note that GBP and GPE can never be active together. This is
1364 * ensured in vxlan_dev_configure.
1367 if (unparsed
.vx_flags
|| unparsed
.vx_vni
) {
1368 /* If there are any unprocessed flags remaining treat
1369 * this as a malformed packet. This behavior diverges from
1370 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1371 * in reserved fields are to be ignored. The approach here
1372 * maintains compatibility with previous stack code, and also
1373 * is more robust and provides a little more security in
1374 * adding extensions to VXLAN.
1380 if (!vxlan_set_mac(vxlan
, vs
, skb
))
1383 skb
->dev
= vxlan
->dev
;
1384 skb
->pkt_type
= PACKET_HOST
;
1387 oiph
= skb_network_header(skb
);
1388 skb_reset_network_header(skb
);
1390 if (!vxlan_ecn_decapsulate(vs
, oiph
, skb
)) {
1391 ++vxlan
->dev
->stats
.rx_frame_errors
;
1392 ++vxlan
->dev
->stats
.rx_errors
;
1396 stats
= this_cpu_ptr(vxlan
->dev
->tstats
);
1397 u64_stats_update_begin(&stats
->syncp
);
1398 stats
->rx_packets
++;
1399 stats
->rx_bytes
+= skb
->len
;
1400 u64_stats_update_end(&stats
->syncp
);
1402 gro_cells_receive(&vxlan
->gro_cells
, skb
);
1406 /* Consume bad packet */
1411 static int arp_reduce(struct net_device
*dev
, struct sk_buff
*skb
)
1413 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1414 struct arphdr
*parp
;
1417 struct neighbour
*n
;
1419 if (dev
->flags
& IFF_NOARP
)
1422 if (!pskb_may_pull(skb
, arp_hdr_len(dev
))) {
1423 dev
->stats
.tx_dropped
++;
1426 parp
= arp_hdr(skb
);
1428 if ((parp
->ar_hrd
!= htons(ARPHRD_ETHER
) &&
1429 parp
->ar_hrd
!= htons(ARPHRD_IEEE802
)) ||
1430 parp
->ar_pro
!= htons(ETH_P_IP
) ||
1431 parp
->ar_op
!= htons(ARPOP_REQUEST
) ||
1432 parp
->ar_hln
!= dev
->addr_len
||
1435 arpptr
= (u8
*)parp
+ sizeof(struct arphdr
);
1437 arpptr
+= dev
->addr_len
; /* sha */
1438 memcpy(&sip
, arpptr
, sizeof(sip
));
1439 arpptr
+= sizeof(sip
);
1440 arpptr
+= dev
->addr_len
; /* tha */
1441 memcpy(&tip
, arpptr
, sizeof(tip
));
1443 if (ipv4_is_loopback(tip
) ||
1444 ipv4_is_multicast(tip
))
1447 n
= neigh_lookup(&arp_tbl
, &tip
, dev
);
1450 struct vxlan_fdb
*f
;
1451 struct sk_buff
*reply
;
1453 if (!(n
->nud_state
& NUD_CONNECTED
)) {
1458 f
= vxlan_find_mac(vxlan
, n
->ha
);
1459 if (f
&& vxlan_addr_any(&(first_remote_rcu(f
)->remote_ip
))) {
1460 /* bridge-local neighbor */
1465 reply
= arp_create(ARPOP_REPLY
, ETH_P_ARP
, sip
, dev
, tip
, sha
,
1473 skb_reset_mac_header(reply
);
1474 __skb_pull(reply
, skb_network_offset(reply
));
1475 reply
->ip_summed
= CHECKSUM_UNNECESSARY
;
1476 reply
->pkt_type
= PACKET_HOST
;
1478 if (netif_rx_ni(reply
) == NET_RX_DROP
)
1479 dev
->stats
.rx_dropped
++;
1480 } else if (vxlan
->flags
& VXLAN_F_L3MISS
) {
1481 union vxlan_addr ipa
= {
1482 .sin
.sin_addr
.s_addr
= tip
,
1483 .sin
.sin_family
= AF_INET
,
1486 vxlan_ip_miss(dev
, &ipa
);
1490 return NETDEV_TX_OK
;
1493 #if IS_ENABLED(CONFIG_IPV6)
1494 static struct sk_buff
*vxlan_na_create(struct sk_buff
*request
,
1495 struct neighbour
*n
, bool isrouter
)
1497 struct net_device
*dev
= request
->dev
;
1498 struct sk_buff
*reply
;
1499 struct nd_msg
*ns
, *na
;
1500 struct ipv6hdr
*pip6
;
1502 int na_olen
= 8; /* opt hdr + ETH_ALEN for target */
1509 len
= LL_RESERVED_SPACE(dev
) + sizeof(struct ipv6hdr
) +
1510 sizeof(*na
) + na_olen
+ dev
->needed_tailroom
;
1511 reply
= alloc_skb(len
, GFP_ATOMIC
);
1515 reply
->protocol
= htons(ETH_P_IPV6
);
1517 skb_reserve(reply
, LL_RESERVED_SPACE(request
->dev
));
1518 skb_push(reply
, sizeof(struct ethhdr
));
1519 skb_reset_mac_header(reply
);
1521 ns
= (struct nd_msg
*)skb_transport_header(request
);
1523 daddr
= eth_hdr(request
)->h_source
;
1524 ns_olen
= request
->len
- skb_transport_offset(request
) - sizeof(*ns
);
1525 for (i
= 0; i
< ns_olen
-1; i
+= (ns
->opt
[i
+1]<<3)) {
1526 if (ns
->opt
[i
] == ND_OPT_SOURCE_LL_ADDR
) {
1527 daddr
= ns
->opt
+ i
+ sizeof(struct nd_opt_hdr
);
1532 /* Ethernet header */
1533 ether_addr_copy(eth_hdr(reply
)->h_dest
, daddr
);
1534 ether_addr_copy(eth_hdr(reply
)->h_source
, n
->ha
);
1535 eth_hdr(reply
)->h_proto
= htons(ETH_P_IPV6
);
1536 reply
->protocol
= htons(ETH_P_IPV6
);
1538 skb_pull(reply
, sizeof(struct ethhdr
));
1539 skb_reset_network_header(reply
);
1540 skb_put(reply
, sizeof(struct ipv6hdr
));
1544 pip6
= ipv6_hdr(reply
);
1545 memset(pip6
, 0, sizeof(struct ipv6hdr
));
1547 pip6
->priority
= ipv6_hdr(request
)->priority
;
1548 pip6
->nexthdr
= IPPROTO_ICMPV6
;
1549 pip6
->hop_limit
= 255;
1550 pip6
->daddr
= ipv6_hdr(request
)->saddr
;
1551 pip6
->saddr
= *(struct in6_addr
*)n
->primary_key
;
1553 skb_pull(reply
, sizeof(struct ipv6hdr
));
1554 skb_reset_transport_header(reply
);
1556 na
= (struct nd_msg
*)skb_put(reply
, sizeof(*na
) + na_olen
);
1558 /* Neighbor Advertisement */
1559 memset(na
, 0, sizeof(*na
)+na_olen
);
1560 na
->icmph
.icmp6_type
= NDISC_NEIGHBOUR_ADVERTISEMENT
;
1561 na
->icmph
.icmp6_router
= isrouter
;
1562 na
->icmph
.icmp6_override
= 1;
1563 na
->icmph
.icmp6_solicited
= 1;
1564 na
->target
= ns
->target
;
1565 ether_addr_copy(&na
->opt
[2], n
->ha
);
1566 na
->opt
[0] = ND_OPT_TARGET_LL_ADDR
;
1567 na
->opt
[1] = na_olen
>> 3;
1569 na
->icmph
.icmp6_cksum
= csum_ipv6_magic(&pip6
->saddr
,
1570 &pip6
->daddr
, sizeof(*na
)+na_olen
, IPPROTO_ICMPV6
,
1571 csum_partial(na
, sizeof(*na
)+na_olen
, 0));
1573 pip6
->payload_len
= htons(sizeof(*na
)+na_olen
);
1575 skb_push(reply
, sizeof(struct ipv6hdr
));
1577 reply
->ip_summed
= CHECKSUM_UNNECESSARY
;
1582 static int neigh_reduce(struct net_device
*dev
, struct sk_buff
*skb
)
1584 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1586 const struct ipv6hdr
*iphdr
;
1587 const struct in6_addr
*saddr
, *daddr
;
1588 struct neighbour
*n
;
1589 struct inet6_dev
*in6_dev
;
1591 in6_dev
= __in6_dev_get(dev
);
1595 iphdr
= ipv6_hdr(skb
);
1596 saddr
= &iphdr
->saddr
;
1597 daddr
= &iphdr
->daddr
;
1599 msg
= (struct nd_msg
*)skb_transport_header(skb
);
1600 if (msg
->icmph
.icmp6_code
!= 0 ||
1601 msg
->icmph
.icmp6_type
!= NDISC_NEIGHBOUR_SOLICITATION
)
1604 if (ipv6_addr_loopback(daddr
) ||
1605 ipv6_addr_is_multicast(&msg
->target
))
1608 n
= neigh_lookup(ipv6_stub
->nd_tbl
, &msg
->target
, dev
);
1611 struct vxlan_fdb
*f
;
1612 struct sk_buff
*reply
;
1614 if (!(n
->nud_state
& NUD_CONNECTED
)) {
1619 f
= vxlan_find_mac(vxlan
, n
->ha
);
1620 if (f
&& vxlan_addr_any(&(first_remote_rcu(f
)->remote_ip
))) {
1621 /* bridge-local neighbor */
1626 reply
= vxlan_na_create(skb
, n
,
1627 !!(f
? f
->flags
& NTF_ROUTER
: 0));
1634 if (netif_rx_ni(reply
) == NET_RX_DROP
)
1635 dev
->stats
.rx_dropped
++;
1637 } else if (vxlan
->flags
& VXLAN_F_L3MISS
) {
1638 union vxlan_addr ipa
= {
1639 .sin6
.sin6_addr
= msg
->target
,
1640 .sin6
.sin6_family
= AF_INET6
,
1643 vxlan_ip_miss(dev
, &ipa
);
1648 return NETDEV_TX_OK
;
1652 static bool route_shortcircuit(struct net_device
*dev
, struct sk_buff
*skb
)
1654 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1655 struct neighbour
*n
;
1657 if (is_multicast_ether_addr(eth_hdr(skb
)->h_dest
))
1661 switch (ntohs(eth_hdr(skb
)->h_proto
)) {
1666 if (!pskb_may_pull(skb
, sizeof(struct iphdr
)))
1669 n
= neigh_lookup(&arp_tbl
, &pip
->daddr
, dev
);
1670 if (!n
&& (vxlan
->flags
& VXLAN_F_L3MISS
)) {
1671 union vxlan_addr ipa
= {
1672 .sin
.sin_addr
.s_addr
= pip
->daddr
,
1673 .sin
.sin_family
= AF_INET
,
1676 vxlan_ip_miss(dev
, &ipa
);
1682 #if IS_ENABLED(CONFIG_IPV6)
1685 struct ipv6hdr
*pip6
;
1687 if (!pskb_may_pull(skb
, sizeof(struct ipv6hdr
)))
1689 pip6
= ipv6_hdr(skb
);
1690 n
= neigh_lookup(ipv6_stub
->nd_tbl
, &pip6
->daddr
, dev
);
1691 if (!n
&& (vxlan
->flags
& VXLAN_F_L3MISS
)) {
1692 union vxlan_addr ipa
= {
1693 .sin6
.sin6_addr
= pip6
->daddr
,
1694 .sin6
.sin6_family
= AF_INET6
,
1697 vxlan_ip_miss(dev
, &ipa
);
1711 diff
= !ether_addr_equal(eth_hdr(skb
)->h_dest
, n
->ha
);
1713 memcpy(eth_hdr(skb
)->h_source
, eth_hdr(skb
)->h_dest
,
1715 memcpy(eth_hdr(skb
)->h_dest
, n
->ha
, dev
->addr_len
);
1724 static void vxlan_build_gbp_hdr(struct vxlanhdr
*vxh
, u32 vxflags
,
1725 struct vxlan_metadata
*md
)
1727 struct vxlanhdr_gbp
*gbp
;
1732 gbp
= (struct vxlanhdr_gbp
*)vxh
;
1733 vxh
->vx_flags
|= VXLAN_HF_GBP
;
1735 if (md
->gbp
& VXLAN_GBP_DONT_LEARN
)
1736 gbp
->dont_learn
= 1;
1738 if (md
->gbp
& VXLAN_GBP_POLICY_APPLIED
)
1739 gbp
->policy_applied
= 1;
1741 gbp
->policy_id
= htons(md
->gbp
& VXLAN_GBP_ID_MASK
);
1744 static int vxlan_build_gpe_hdr(struct vxlanhdr
*vxh
, u32 vxflags
,
1747 struct vxlanhdr_gpe
*gpe
= (struct vxlanhdr_gpe
*)vxh
;
1749 gpe
->np_applied
= 1;
1752 case htons(ETH_P_IP
):
1753 gpe
->next_protocol
= VXLAN_GPE_NP_IPV4
;
1755 case htons(ETH_P_IPV6
):
1756 gpe
->next_protocol
= VXLAN_GPE_NP_IPV6
;
1758 case htons(ETH_P_TEB
):
1759 gpe
->next_protocol
= VXLAN_GPE_NP_ETHERNET
;
1762 return -EPFNOSUPPORT
;
1765 static int vxlan_build_skb(struct sk_buff
*skb
, struct dst_entry
*dst
,
1766 int iphdr_len
, __be32 vni
,
1767 struct vxlan_metadata
*md
, u32 vxflags
,
1770 struct vxlanhdr
*vxh
;
1773 int type
= udp_sum
? SKB_GSO_UDP_TUNNEL_CSUM
: SKB_GSO_UDP_TUNNEL
;
1774 __be16 inner_protocol
= htons(ETH_P_TEB
);
1776 if ((vxflags
& VXLAN_F_REMCSUM_TX
) &&
1777 skb
->ip_summed
== CHECKSUM_PARTIAL
) {
1778 int csum_start
= skb_checksum_start_offset(skb
);
1780 if (csum_start
<= VXLAN_MAX_REMCSUM_START
&&
1781 !(csum_start
& VXLAN_RCO_SHIFT_MASK
) &&
1782 (skb
->csum_offset
== offsetof(struct udphdr
, check
) ||
1783 skb
->csum_offset
== offsetof(struct tcphdr
, check
)))
1784 type
|= SKB_GSO_TUNNEL_REMCSUM
;
1787 min_headroom
= LL_RESERVED_SPACE(dst
->dev
) + dst
->header_len
1788 + VXLAN_HLEN
+ iphdr_len
1789 + (skb_vlan_tag_present(skb
) ? VLAN_HLEN
: 0);
1791 /* Need space for new headers (invalidates iph ptr) */
1792 err
= skb_cow_head(skb
, min_headroom
);
1796 skb
= vlan_hwaccel_push_inside(skb
);
1800 skb
= iptunnel_handle_offloads(skb
, type
);
1802 return PTR_ERR(skb
);
1804 vxh
= (struct vxlanhdr
*) __skb_push(skb
, sizeof(*vxh
));
1805 vxh
->vx_flags
= VXLAN_HF_VNI
;
1806 vxh
->vx_vni
= vxlan_vni_field(vni
);
1808 if (type
& SKB_GSO_TUNNEL_REMCSUM
) {
1811 start
= skb_checksum_start_offset(skb
) - sizeof(struct vxlanhdr
);
1812 vxh
->vx_vni
|= vxlan_compute_rco(start
, skb
->csum_offset
);
1813 vxh
->vx_flags
|= VXLAN_HF_RCO
;
1815 if (!skb_is_gso(skb
)) {
1816 skb
->ip_summed
= CHECKSUM_NONE
;
1817 skb
->encapsulation
= 0;
1821 if (vxflags
& VXLAN_F_GBP
)
1822 vxlan_build_gbp_hdr(vxh
, vxflags
, md
);
1823 if (vxflags
& VXLAN_F_GPE
) {
1824 err
= vxlan_build_gpe_hdr(vxh
, vxflags
, skb
->protocol
);
1827 inner_protocol
= skb
->protocol
;
1830 skb_set_inner_protocol(skb
, inner_protocol
);
1838 static struct rtable
*vxlan_get_route(struct vxlan_dev
*vxlan
,
1839 struct sk_buff
*skb
, int oif
, u8 tos
,
1840 __be32 daddr
, __be32
*saddr
,
1841 struct dst_cache
*dst_cache
,
1842 const struct ip_tunnel_info
*info
)
1844 bool use_cache
= ip_tunnel_dst_cache_usable(skb
, info
);
1845 struct rtable
*rt
= NULL
;
1851 rt
= dst_cache_get_ip4(dst_cache
, saddr
);
1856 memset(&fl4
, 0, sizeof(fl4
));
1857 fl4
.flowi4_oif
= oif
;
1858 fl4
.flowi4_tos
= RT_TOS(tos
);
1859 fl4
.flowi4_mark
= skb
->mark
;
1860 fl4
.flowi4_proto
= IPPROTO_UDP
;
1862 fl4
.saddr
= vxlan
->cfg
.saddr
.sin
.sin_addr
.s_addr
;
1864 rt
= ip_route_output_key(vxlan
->net
, &fl4
);
1868 dst_cache_set_ip4(dst_cache
, &rt
->dst
, fl4
.saddr
);
1873 #if IS_ENABLED(CONFIG_IPV6)
1874 static struct dst_entry
*vxlan6_get_route(struct vxlan_dev
*vxlan
,
1875 struct sk_buff
*skb
, int oif
, u8 tos
,
1877 const struct in6_addr
*daddr
,
1878 struct in6_addr
*saddr
,
1879 struct dst_cache
*dst_cache
,
1880 const struct ip_tunnel_info
*info
)
1882 bool use_cache
= ip_tunnel_dst_cache_usable(skb
, info
);
1883 struct dst_entry
*ndst
;
1890 ndst
= dst_cache_get_ip6(dst_cache
, saddr
);
1895 memset(&fl6
, 0, sizeof(fl6
));
1896 fl6
.flowi6_oif
= oif
;
1898 fl6
.saddr
= vxlan
->cfg
.saddr
.sin6
.sin6_addr
;
1899 fl6
.flowlabel
= ip6_make_flowinfo(RT_TOS(tos
), label
);
1900 fl6
.flowi6_mark
= skb
->mark
;
1901 fl6
.flowi6_proto
= IPPROTO_UDP
;
1903 err
= ipv6_stub
->ipv6_dst_lookup(vxlan
->net
,
1904 vxlan
->vn6_sock
->sock
->sk
,
1907 return ERR_PTR(err
);
1911 dst_cache_set_ip6(dst_cache
, ndst
, saddr
);
1916 /* Bypass encapsulation if the destination is local */
1917 static void vxlan_encap_bypass(struct sk_buff
*skb
, struct vxlan_dev
*src_vxlan
,
1918 struct vxlan_dev
*dst_vxlan
)
1920 struct pcpu_sw_netstats
*tx_stats
, *rx_stats
;
1921 union vxlan_addr loopback
;
1922 union vxlan_addr
*remote_ip
= &dst_vxlan
->default_dst
.remote_ip
;
1923 struct net_device
*dev
= skb
->dev
;
1926 tx_stats
= this_cpu_ptr(src_vxlan
->dev
->tstats
);
1927 rx_stats
= this_cpu_ptr(dst_vxlan
->dev
->tstats
);
1928 skb
->pkt_type
= PACKET_HOST
;
1929 skb
->encapsulation
= 0;
1930 skb
->dev
= dst_vxlan
->dev
;
1931 __skb_pull(skb
, skb_network_offset(skb
));
1933 if (remote_ip
->sa
.sa_family
== AF_INET
) {
1934 loopback
.sin
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
1935 loopback
.sa
.sa_family
= AF_INET
;
1936 #if IS_ENABLED(CONFIG_IPV6)
1938 loopback
.sin6
.sin6_addr
= in6addr_loopback
;
1939 loopback
.sa
.sa_family
= AF_INET6
;
1943 if (dst_vxlan
->flags
& VXLAN_F_LEARN
)
1944 vxlan_snoop(skb
->dev
, &loopback
, eth_hdr(skb
)->h_source
);
1946 u64_stats_update_begin(&tx_stats
->syncp
);
1947 tx_stats
->tx_packets
++;
1948 tx_stats
->tx_bytes
+= len
;
1949 u64_stats_update_end(&tx_stats
->syncp
);
1951 if (netif_rx(skb
) == NET_RX_SUCCESS
) {
1952 u64_stats_update_begin(&rx_stats
->syncp
);
1953 rx_stats
->rx_packets
++;
1954 rx_stats
->rx_bytes
+= len
;
1955 u64_stats_update_end(&rx_stats
->syncp
);
1957 dev
->stats
.rx_dropped
++;
1961 static void vxlan_xmit_one(struct sk_buff
*skb
, struct net_device
*dev
,
1962 struct vxlan_rdst
*rdst
, bool did_rsc
)
1964 struct dst_cache
*dst_cache
;
1965 struct ip_tunnel_info
*info
;
1966 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1968 struct rtable
*rt
= NULL
;
1969 const struct iphdr
*old_iph
;
1970 union vxlan_addr
*dst
;
1971 union vxlan_addr remote_ip
;
1972 struct vxlan_metadata _md
;
1973 struct vxlan_metadata
*md
= &_md
;
1974 __be16 src_port
= 0, dst_port
;
1979 u32 flags
= vxlan
->flags
;
1980 bool udp_sum
= false;
1981 bool xnet
= !net_eq(vxlan
->net
, dev_net(vxlan
->dev
));
1983 info
= skb_tunnel_info(skb
);
1986 dst_port
= rdst
->remote_port
? rdst
->remote_port
: vxlan
->cfg
.dst_port
;
1987 vni
= rdst
->remote_vni
;
1988 dst
= &rdst
->remote_ip
;
1989 dst_cache
= &rdst
->dst_cache
;
1992 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1996 dst_port
= info
->key
.tp_dst
? : vxlan
->cfg
.dst_port
;
1997 vni
= vxlan_tun_id_to_vni(info
->key
.tun_id
);
1998 remote_ip
.sa
.sa_family
= ip_tunnel_info_af(info
);
1999 if (remote_ip
.sa
.sa_family
== AF_INET
)
2000 remote_ip
.sin
.sin_addr
.s_addr
= info
->key
.u
.ipv4
.dst
;
2002 remote_ip
.sin6
.sin6_addr
= info
->key
.u
.ipv6
.dst
;
2004 dst_cache
= &info
->dst_cache
;
2007 if (vxlan_addr_any(dst
)) {
2009 /* short-circuited back to local bridge */
2010 vxlan_encap_bypass(skb
, vxlan
, vxlan
);
2016 old_iph
= ip_hdr(skb
);
2018 ttl
= vxlan
->cfg
.ttl
;
2019 if (!ttl
&& vxlan_addr_multicast(dst
))
2022 tos
= vxlan
->cfg
.tos
;
2024 tos
= ip_tunnel_get_dsfield(old_iph
, skb
);
2026 label
= vxlan
->cfg
.label
;
2027 src_port
= udp_flow_src_port(dev_net(dev
), skb
, vxlan
->cfg
.port_min
,
2028 vxlan
->cfg
.port_max
, true);
2031 ttl
= info
->key
.ttl
;
2032 tos
= info
->key
.tos
;
2033 label
= info
->key
.label
;
2034 udp_sum
= !!(info
->key
.tun_flags
& TUNNEL_CSUM
);
2036 if (info
->options_len
)
2037 md
= ip_tunnel_info_opts(info
);
2039 md
->gbp
= skb
->mark
;
2042 if (dst
->sa
.sa_family
== AF_INET
) {
2045 if (!vxlan
->vn4_sock
)
2047 sk
= vxlan
->vn4_sock
->sock
->sk
;
2049 rt
= vxlan_get_route(vxlan
, skb
,
2050 rdst
? rdst
->remote_ifindex
: 0, tos
,
2051 dst
->sin
.sin_addr
.s_addr
, &saddr
,
2054 netdev_dbg(dev
, "no route to %pI4\n",
2055 &dst
->sin
.sin_addr
.s_addr
);
2056 dev
->stats
.tx_carrier_errors
++;
2060 if (rt
->dst
.dev
== dev
) {
2061 netdev_dbg(dev
, "circular route to %pI4\n",
2062 &dst
->sin
.sin_addr
.s_addr
);
2063 dev
->stats
.collisions
++;
2067 /* Bypass encapsulation if the destination is local */
2068 if (rt
->rt_flags
& RTCF_LOCAL
&&
2069 !(rt
->rt_flags
& (RTCF_BROADCAST
| RTCF_MULTICAST
))) {
2070 struct vxlan_dev
*dst_vxlan
;
2073 dst_vxlan
= vxlan_find_vni(vxlan
->net
, vni
,
2074 dst
->sa
.sa_family
, dst_port
,
2078 vxlan_encap_bypass(skb
, vxlan
, dst_vxlan
);
2083 udp_sum
= !(flags
& VXLAN_F_UDP_ZERO_CSUM_TX
);
2084 else if (info
->key
.tun_flags
& TUNNEL_DONT_FRAGMENT
)
2087 tos
= ip_tunnel_ecn_encap(tos
, old_iph
, skb
);
2088 ttl
= ttl
? : ip4_dst_hoplimit(&rt
->dst
);
2089 err
= vxlan_build_skb(skb
, &rt
->dst
, sizeof(struct iphdr
),
2090 vni
, md
, flags
, udp_sum
);
2094 udp_tunnel_xmit_skb(rt
, sk
, skb
, saddr
,
2095 dst
->sin
.sin_addr
.s_addr
, tos
, ttl
, df
,
2096 src_port
, dst_port
, xnet
, !udp_sum
);
2097 #if IS_ENABLED(CONFIG_IPV6)
2099 struct dst_entry
*ndst
;
2100 struct in6_addr saddr
;
2103 if (!vxlan
->vn6_sock
)
2105 sk
= vxlan
->vn6_sock
->sock
->sk
;
2107 ndst
= vxlan6_get_route(vxlan
, skb
,
2108 rdst
? rdst
->remote_ifindex
: 0, tos
,
2109 label
, &dst
->sin6
.sin6_addr
, &saddr
,
2112 netdev_dbg(dev
, "no route to %pI6\n",
2113 &dst
->sin6
.sin6_addr
);
2114 dev
->stats
.tx_carrier_errors
++;
2118 if (ndst
->dev
== dev
) {
2119 netdev_dbg(dev
, "circular route to %pI6\n",
2120 &dst
->sin6
.sin6_addr
);
2122 dev
->stats
.collisions
++;
2126 /* Bypass encapsulation if the destination is local */
2127 rt6i_flags
= ((struct rt6_info
*)ndst
)->rt6i_flags
;
2128 if (rt6i_flags
& RTF_LOCAL
&&
2129 !(rt6i_flags
& (RTCF_BROADCAST
| RTCF_MULTICAST
))) {
2130 struct vxlan_dev
*dst_vxlan
;
2133 dst_vxlan
= vxlan_find_vni(vxlan
->net
, vni
,
2134 dst
->sa
.sa_family
, dst_port
,
2138 vxlan_encap_bypass(skb
, vxlan
, dst_vxlan
);
2143 udp_sum
= !(flags
& VXLAN_F_UDP_ZERO_CSUM6_TX
);
2145 tos
= ip_tunnel_ecn_encap(tos
, old_iph
, skb
);
2146 ttl
= ttl
? : ip6_dst_hoplimit(ndst
);
2147 skb_scrub_packet(skb
, xnet
);
2148 err
= vxlan_build_skb(skb
, ndst
, sizeof(struct ipv6hdr
),
2149 vni
, md
, flags
, udp_sum
);
2154 udp_tunnel6_xmit_skb(ndst
, sk
, skb
, dev
,
2155 &saddr
, &dst
->sin6
.sin6_addr
, tos
, ttl
,
2156 label
, src_port
, dst_port
, !udp_sum
);
2163 dev
->stats
.tx_dropped
++;
2167 /* skb is already freed. */
2172 dev
->stats
.tx_errors
++;
2177 /* Transmit local packets over Vxlan
2179 * Outer IP header inherits ECN and DF from inner header.
2180 * Outer UDP destination is the VXLAN assigned port.
2181 * source port is based on hash of flow
2183 static netdev_tx_t
vxlan_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
2185 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2186 const struct ip_tunnel_info
*info
;
2188 bool did_rsc
= false;
2189 struct vxlan_rdst
*rdst
, *fdst
= NULL
;
2190 struct vxlan_fdb
*f
;
2192 info
= skb_tunnel_info(skb
);
2194 skb_reset_mac_header(skb
);
2196 if (vxlan
->flags
& VXLAN_F_COLLECT_METADATA
) {
2197 if (info
&& info
->mode
& IP_TUNNEL_INFO_TX
)
2198 vxlan_xmit_one(skb
, dev
, NULL
, false);
2201 return NETDEV_TX_OK
;
2204 if (vxlan
->flags
& VXLAN_F_PROXY
) {
2206 if (ntohs(eth
->h_proto
) == ETH_P_ARP
)
2207 return arp_reduce(dev
, skb
);
2208 #if IS_ENABLED(CONFIG_IPV6)
2209 else if (ntohs(eth
->h_proto
) == ETH_P_IPV6
&&
2210 pskb_may_pull(skb
, sizeof(struct ipv6hdr
)
2211 + sizeof(struct nd_msg
)) &&
2212 ipv6_hdr(skb
)->nexthdr
== IPPROTO_ICMPV6
) {
2215 msg
= (struct nd_msg
*)skb_transport_header(skb
);
2216 if (msg
->icmph
.icmp6_code
== 0 &&
2217 msg
->icmph
.icmp6_type
== NDISC_NEIGHBOUR_SOLICITATION
)
2218 return neigh_reduce(dev
, skb
);
2224 f
= vxlan_find_mac(vxlan
, eth
->h_dest
);
2227 if (f
&& (f
->flags
& NTF_ROUTER
) && (vxlan
->flags
& VXLAN_F_RSC
) &&
2228 (ntohs(eth
->h_proto
) == ETH_P_IP
||
2229 ntohs(eth
->h_proto
) == ETH_P_IPV6
)) {
2230 did_rsc
= route_shortcircuit(dev
, skb
);
2232 f
= vxlan_find_mac(vxlan
, eth
->h_dest
);
2236 f
= vxlan_find_mac(vxlan
, all_zeros_mac
);
2238 if ((vxlan
->flags
& VXLAN_F_L2MISS
) &&
2239 !is_multicast_ether_addr(eth
->h_dest
))
2240 vxlan_fdb_miss(vxlan
, eth
->h_dest
);
2242 dev
->stats
.tx_dropped
++;
2244 return NETDEV_TX_OK
;
2248 list_for_each_entry_rcu(rdst
, &f
->remotes
, list
) {
2249 struct sk_buff
*skb1
;
2255 skb1
= skb_clone(skb
, GFP_ATOMIC
);
2257 vxlan_xmit_one(skb1
, dev
, rdst
, did_rsc
);
2261 vxlan_xmit_one(skb
, dev
, fdst
, did_rsc
);
2264 return NETDEV_TX_OK
;
2267 /* Walk the forwarding table and purge stale entries */
2268 static void vxlan_cleanup(unsigned long arg
)
2270 struct vxlan_dev
*vxlan
= (struct vxlan_dev
*) arg
;
2271 unsigned long next_timer
= jiffies
+ FDB_AGE_INTERVAL
;
2274 if (!netif_running(vxlan
->dev
))
2277 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
2278 struct hlist_node
*p
, *n
;
2280 spin_lock_bh(&vxlan
->hash_lock
);
2281 hlist_for_each_safe(p
, n
, &vxlan
->fdb_head
[h
]) {
2283 = container_of(p
, struct vxlan_fdb
, hlist
);
2284 unsigned long timeout
;
2286 if (f
->state
& NUD_PERMANENT
)
2289 timeout
= f
->used
+ vxlan
->cfg
.age_interval
* HZ
;
2290 if (time_before_eq(timeout
, jiffies
)) {
2291 netdev_dbg(vxlan
->dev
,
2292 "garbage collect %pM\n",
2294 f
->state
= NUD_STALE
;
2295 vxlan_fdb_destroy(vxlan
, f
);
2296 } else if (time_before(timeout
, next_timer
))
2297 next_timer
= timeout
;
2299 spin_unlock_bh(&vxlan
->hash_lock
);
2302 mod_timer(&vxlan
->age_timer
, next_timer
);
2305 static void vxlan_vs_add_dev(struct vxlan_sock
*vs
, struct vxlan_dev
*vxlan
)
2307 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2308 __be32 vni
= vxlan
->default_dst
.remote_vni
;
2310 spin_lock(&vn
->sock_lock
);
2311 hlist_add_head_rcu(&vxlan
->hlist
, vni_head(vs
, vni
));
2312 spin_unlock(&vn
->sock_lock
);
2315 /* Setup stats when device is created */
2316 static int vxlan_init(struct net_device
*dev
)
2318 dev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
2325 static void vxlan_fdb_delete_default(struct vxlan_dev
*vxlan
)
2327 struct vxlan_fdb
*f
;
2329 spin_lock_bh(&vxlan
->hash_lock
);
2330 f
= __vxlan_find_mac(vxlan
, all_zeros_mac
);
2332 vxlan_fdb_destroy(vxlan
, f
);
2333 spin_unlock_bh(&vxlan
->hash_lock
);
2336 static void vxlan_uninit(struct net_device
*dev
)
2338 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2340 vxlan_fdb_delete_default(vxlan
);
2342 free_percpu(dev
->tstats
);
2345 /* Start ageing timer and join group when device is brought up */
2346 static int vxlan_open(struct net_device
*dev
)
2348 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2351 ret
= vxlan_sock_add(vxlan
);
2355 if (vxlan_addr_multicast(&vxlan
->default_dst
.remote_ip
)) {
2356 ret
= vxlan_igmp_join(vxlan
);
2357 if (ret
== -EADDRINUSE
)
2360 vxlan_sock_release(vxlan
);
2365 if (vxlan
->cfg
.age_interval
)
2366 mod_timer(&vxlan
->age_timer
, jiffies
+ FDB_AGE_INTERVAL
);
2371 /* Purge the forwarding table */
2372 static void vxlan_flush(struct vxlan_dev
*vxlan
)
2376 spin_lock_bh(&vxlan
->hash_lock
);
2377 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
2378 struct hlist_node
*p
, *n
;
2379 hlist_for_each_safe(p
, n
, &vxlan
->fdb_head
[h
]) {
2381 = container_of(p
, struct vxlan_fdb
, hlist
);
2382 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2383 if (!is_zero_ether_addr(f
->eth_addr
))
2384 vxlan_fdb_destroy(vxlan
, f
);
2387 spin_unlock_bh(&vxlan
->hash_lock
);
2390 /* Cleanup timer and forwarding table on shutdown */
2391 static int vxlan_stop(struct net_device
*dev
)
2393 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2394 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2397 if (vxlan_addr_multicast(&vxlan
->default_dst
.remote_ip
) &&
2398 !vxlan_group_used(vn
, vxlan
))
2399 ret
= vxlan_igmp_leave(vxlan
);
2401 del_timer_sync(&vxlan
->age_timer
);
2404 vxlan_sock_release(vxlan
);
2409 /* Stub, nothing needs to be done. */
2410 static void vxlan_set_multicast_list(struct net_device
*dev
)
2414 static int __vxlan_change_mtu(struct net_device
*dev
,
2415 struct net_device
*lowerdev
,
2416 struct vxlan_rdst
*dst
, int new_mtu
, bool strict
)
2418 int max_mtu
= IP_MAX_MTU
;
2421 max_mtu
= lowerdev
->mtu
;
2423 if (dst
->remote_ip
.sa
.sa_family
== AF_INET6
)
2424 max_mtu
-= VXLAN6_HEADROOM
;
2426 max_mtu
-= VXLAN_HEADROOM
;
2431 if (new_mtu
> max_mtu
) {
2442 static int vxlan_change_mtu(struct net_device
*dev
, int new_mtu
)
2444 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2445 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
2446 struct net_device
*lowerdev
= __dev_get_by_index(vxlan
->net
,
2447 dst
->remote_ifindex
);
2448 return __vxlan_change_mtu(dev
, lowerdev
, dst
, new_mtu
, true);
2451 static int vxlan_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
)
2453 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2454 struct ip_tunnel_info
*info
= skb_tunnel_info(skb
);
2455 __be16 sport
, dport
;
2457 sport
= udp_flow_src_port(dev_net(dev
), skb
, vxlan
->cfg
.port_min
,
2458 vxlan
->cfg
.port_max
, true);
2459 dport
= info
->key
.tp_dst
? : vxlan
->cfg
.dst_port
;
2461 if (ip_tunnel_info_af(info
) == AF_INET
) {
2464 if (!vxlan
->vn4_sock
)
2466 rt
= vxlan_get_route(vxlan
, skb
, 0, info
->key
.tos
,
2467 info
->key
.u
.ipv4
.dst
,
2468 &info
->key
.u
.ipv4
.src
, NULL
, info
);
2473 #if IS_ENABLED(CONFIG_IPV6)
2474 struct dst_entry
*ndst
;
2476 if (!vxlan
->vn6_sock
)
2478 ndst
= vxlan6_get_route(vxlan
, skb
, 0, info
->key
.tos
,
2479 info
->key
.label
, &info
->key
.u
.ipv6
.dst
,
2480 &info
->key
.u
.ipv6
.src
, NULL
, info
);
2482 return PTR_ERR(ndst
);
2484 #else /* !CONFIG_IPV6 */
2485 return -EPFNOSUPPORT
;
2488 info
->key
.tp_src
= sport
;
2489 info
->key
.tp_dst
= dport
;
2493 static const struct net_device_ops vxlan_netdev_ether_ops
= {
2494 .ndo_init
= vxlan_init
,
2495 .ndo_uninit
= vxlan_uninit
,
2496 .ndo_open
= vxlan_open
,
2497 .ndo_stop
= vxlan_stop
,
2498 .ndo_start_xmit
= vxlan_xmit
,
2499 .ndo_get_stats64
= ip_tunnel_get_stats64
,
2500 .ndo_set_rx_mode
= vxlan_set_multicast_list
,
2501 .ndo_change_mtu
= vxlan_change_mtu
,
2502 .ndo_validate_addr
= eth_validate_addr
,
2503 .ndo_set_mac_address
= eth_mac_addr
,
2504 .ndo_fdb_add
= vxlan_fdb_add
,
2505 .ndo_fdb_del
= vxlan_fdb_delete
,
2506 .ndo_fdb_dump
= vxlan_fdb_dump
,
2507 .ndo_fill_metadata_dst
= vxlan_fill_metadata_dst
,
2510 static const struct net_device_ops vxlan_netdev_raw_ops
= {
2511 .ndo_init
= vxlan_init
,
2512 .ndo_uninit
= vxlan_uninit
,
2513 .ndo_open
= vxlan_open
,
2514 .ndo_stop
= vxlan_stop
,
2515 .ndo_start_xmit
= vxlan_xmit
,
2516 .ndo_get_stats64
= ip_tunnel_get_stats64
,
2517 .ndo_change_mtu
= vxlan_change_mtu
,
2518 .ndo_fill_metadata_dst
= vxlan_fill_metadata_dst
,
2521 /* Info for udev, that this is a virtual tunnel endpoint */
2522 static struct device_type vxlan_type
= {
2526 /* Calls the ndo_add_vxlan_port of the caller in order to
2527 * supply the listening VXLAN udp ports. Callers are expected
2528 * to implement the ndo_add_vxlan_port.
2530 void vxlan_get_rx_port(struct net_device
*dev
)
2532 struct vxlan_sock
*vs
;
2533 struct net
*net
= dev_net(dev
);
2534 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
2535 sa_family_t sa_family
;
2539 spin_lock(&vn
->sock_lock
);
2540 for (i
= 0; i
< PORT_HASH_SIZE
; ++i
) {
2541 hlist_for_each_entry_rcu(vs
, &vn
->sock_list
[i
], hlist
) {
2542 port
= inet_sk(vs
->sock
->sk
)->inet_sport
;
2543 sa_family
= vxlan_get_sk_family(vs
);
2544 dev
->netdev_ops
->ndo_add_vxlan_port(dev
, sa_family
,
2548 spin_unlock(&vn
->sock_lock
);
2550 EXPORT_SYMBOL_GPL(vxlan_get_rx_port
);
2552 /* Initialize the device structure. */
2553 static void vxlan_setup(struct net_device
*dev
)
2555 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2558 dev
->destructor
= free_netdev
;
2559 SET_NETDEV_DEVTYPE(dev
, &vxlan_type
);
2561 dev
->features
|= NETIF_F_LLTX
;
2562 dev
->features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
;
2563 dev
->features
|= NETIF_F_RXCSUM
;
2564 dev
->features
|= NETIF_F_GSO_SOFTWARE
;
2566 dev
->vlan_features
= dev
->features
;
2567 dev
->features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_STAG_TX
;
2568 dev
->hw_features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
| NETIF_F_RXCSUM
;
2569 dev
->hw_features
|= NETIF_F_GSO_SOFTWARE
;
2570 dev
->hw_features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_STAG_TX
;
2571 netif_keep_dst(dev
);
2572 dev
->priv_flags
|= IFF_NO_QUEUE
;
2574 INIT_LIST_HEAD(&vxlan
->next
);
2575 spin_lock_init(&vxlan
->hash_lock
);
2577 init_timer_deferrable(&vxlan
->age_timer
);
2578 vxlan
->age_timer
.function
= vxlan_cleanup
;
2579 vxlan
->age_timer
.data
= (unsigned long) vxlan
;
2581 vxlan
->cfg
.dst_port
= htons(vxlan_port
);
2585 gro_cells_init(&vxlan
->gro_cells
, dev
);
2587 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
)
2588 INIT_HLIST_HEAD(&vxlan
->fdb_head
[h
]);
2591 static void vxlan_ether_setup(struct net_device
*dev
)
2593 eth_hw_addr_random(dev
);
2595 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
2596 dev
->priv_flags
|= IFF_LIVE_ADDR_CHANGE
;
2597 dev
->netdev_ops
= &vxlan_netdev_ether_ops
;
2600 static void vxlan_raw_setup(struct net_device
*dev
)
2602 dev
->type
= ARPHRD_NONE
;
2603 dev
->hard_header_len
= 0;
2605 dev
->mtu
= ETH_DATA_LEN
;
2606 dev
->tx_queue_len
= 1000;
2607 dev
->flags
= IFF_POINTOPOINT
| IFF_NOARP
| IFF_MULTICAST
;
2608 dev
->netdev_ops
= &vxlan_netdev_raw_ops
;
2611 static const struct nla_policy vxlan_policy
[IFLA_VXLAN_MAX
+ 1] = {
2612 [IFLA_VXLAN_ID
] = { .type
= NLA_U32
},
2613 [IFLA_VXLAN_GROUP
] = { .len
= FIELD_SIZEOF(struct iphdr
, daddr
) },
2614 [IFLA_VXLAN_GROUP6
] = { .len
= sizeof(struct in6_addr
) },
2615 [IFLA_VXLAN_LINK
] = { .type
= NLA_U32
},
2616 [IFLA_VXLAN_LOCAL
] = { .len
= FIELD_SIZEOF(struct iphdr
, saddr
) },
2617 [IFLA_VXLAN_LOCAL6
] = { .len
= sizeof(struct in6_addr
) },
2618 [IFLA_VXLAN_TOS
] = { .type
= NLA_U8
},
2619 [IFLA_VXLAN_TTL
] = { .type
= NLA_U8
},
2620 [IFLA_VXLAN_LABEL
] = { .type
= NLA_U32
},
2621 [IFLA_VXLAN_LEARNING
] = { .type
= NLA_U8
},
2622 [IFLA_VXLAN_AGEING
] = { .type
= NLA_U32
},
2623 [IFLA_VXLAN_LIMIT
] = { .type
= NLA_U32
},
2624 [IFLA_VXLAN_PORT_RANGE
] = { .len
= sizeof(struct ifla_vxlan_port_range
) },
2625 [IFLA_VXLAN_PROXY
] = { .type
= NLA_U8
},
2626 [IFLA_VXLAN_RSC
] = { .type
= NLA_U8
},
2627 [IFLA_VXLAN_L2MISS
] = { .type
= NLA_U8
},
2628 [IFLA_VXLAN_L3MISS
] = { .type
= NLA_U8
},
2629 [IFLA_VXLAN_COLLECT_METADATA
] = { .type
= NLA_U8
},
2630 [IFLA_VXLAN_PORT
] = { .type
= NLA_U16
},
2631 [IFLA_VXLAN_UDP_CSUM
] = { .type
= NLA_U8
},
2632 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX
] = { .type
= NLA_U8
},
2633 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX
] = { .type
= NLA_U8
},
2634 [IFLA_VXLAN_REMCSUM_TX
] = { .type
= NLA_U8
},
2635 [IFLA_VXLAN_REMCSUM_RX
] = { .type
= NLA_U8
},
2636 [IFLA_VXLAN_GBP
] = { .type
= NLA_FLAG
, },
2637 [IFLA_VXLAN_GPE
] = { .type
= NLA_FLAG
, },
2638 [IFLA_VXLAN_REMCSUM_NOPARTIAL
] = { .type
= NLA_FLAG
},
2641 static int vxlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
2643 if (tb
[IFLA_ADDRESS
]) {
2644 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
) {
2645 pr_debug("invalid link address (not ethernet)\n");
2649 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
]))) {
2650 pr_debug("invalid all zero ethernet address\n");
2651 return -EADDRNOTAVAIL
;
2658 if (data
[IFLA_VXLAN_ID
]) {
2659 __u32 id
= nla_get_u32(data
[IFLA_VXLAN_ID
]);
2660 if (id
>= VXLAN_VID_MASK
)
2664 if (data
[IFLA_VXLAN_PORT_RANGE
]) {
2665 const struct ifla_vxlan_port_range
*p
2666 = nla_data(data
[IFLA_VXLAN_PORT_RANGE
]);
2668 if (ntohs(p
->high
) < ntohs(p
->low
)) {
2669 pr_debug("port range %u .. %u not valid\n",
2670 ntohs(p
->low
), ntohs(p
->high
));
2678 static void vxlan_get_drvinfo(struct net_device
*netdev
,
2679 struct ethtool_drvinfo
*drvinfo
)
2681 strlcpy(drvinfo
->version
, VXLAN_VERSION
, sizeof(drvinfo
->version
));
2682 strlcpy(drvinfo
->driver
, "vxlan", sizeof(drvinfo
->driver
));
2685 static const struct ethtool_ops vxlan_ethtool_ops
= {
2686 .get_drvinfo
= vxlan_get_drvinfo
,
2687 .get_link
= ethtool_op_get_link
,
2690 static struct socket
*vxlan_create_sock(struct net
*net
, bool ipv6
,
2691 __be16 port
, u32 flags
)
2693 struct socket
*sock
;
2694 struct udp_port_cfg udp_conf
;
2697 memset(&udp_conf
, 0, sizeof(udp_conf
));
2700 udp_conf
.family
= AF_INET6
;
2701 udp_conf
.use_udp6_rx_checksums
=
2702 !(flags
& VXLAN_F_UDP_ZERO_CSUM6_RX
);
2703 udp_conf
.ipv6_v6only
= 1;
2705 udp_conf
.family
= AF_INET
;
2708 udp_conf
.local_udp_port
= port
;
2710 /* Open UDP socket */
2711 err
= udp_sock_create(net
, &udp_conf
, &sock
);
2713 return ERR_PTR(err
);
2718 /* Create new listen socket if needed */
2719 static struct vxlan_sock
*vxlan_socket_create(struct net
*net
, bool ipv6
,
2720 __be16 port
, u32 flags
)
2722 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
2723 struct vxlan_sock
*vs
;
2724 struct socket
*sock
;
2726 struct udp_tunnel_sock_cfg tunnel_cfg
;
2728 vs
= kzalloc(sizeof(*vs
), GFP_KERNEL
);
2730 return ERR_PTR(-ENOMEM
);
2732 for (h
= 0; h
< VNI_HASH_SIZE
; ++h
)
2733 INIT_HLIST_HEAD(&vs
->vni_list
[h
]);
2735 sock
= vxlan_create_sock(net
, ipv6
, port
, flags
);
2737 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port
),
2740 return ERR_CAST(sock
);
2744 atomic_set(&vs
->refcnt
, 1);
2745 vs
->flags
= (flags
& VXLAN_F_RCV_FLAGS
);
2747 spin_lock(&vn
->sock_lock
);
2748 hlist_add_head_rcu(&vs
->hlist
, vs_head(net
, port
));
2749 vxlan_notify_add_rx_port(vs
);
2750 spin_unlock(&vn
->sock_lock
);
2752 /* Mark socket as an encapsulation socket. */
2753 memset(&tunnel_cfg
, 0, sizeof(tunnel_cfg
));
2754 tunnel_cfg
.sk_user_data
= vs
;
2755 tunnel_cfg
.encap_type
= 1;
2756 tunnel_cfg
.encap_rcv
= vxlan_rcv
;
2757 tunnel_cfg
.encap_destroy
= NULL
;
2758 tunnel_cfg
.gro_receive
= vxlan_gro_receive
;
2759 tunnel_cfg
.gro_complete
= vxlan_gro_complete
;
2761 setup_udp_tunnel_sock(net
, sock
, &tunnel_cfg
);
2766 static int __vxlan_sock_add(struct vxlan_dev
*vxlan
, bool ipv6
)
2768 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2769 struct vxlan_sock
*vs
= NULL
;
2771 if (!vxlan
->cfg
.no_share
) {
2772 spin_lock(&vn
->sock_lock
);
2773 vs
= vxlan_find_sock(vxlan
->net
, ipv6
? AF_INET6
: AF_INET
,
2774 vxlan
->cfg
.dst_port
, vxlan
->flags
);
2775 if (vs
&& !atomic_add_unless(&vs
->refcnt
, 1, 0)) {
2776 spin_unlock(&vn
->sock_lock
);
2779 spin_unlock(&vn
->sock_lock
);
2782 vs
= vxlan_socket_create(vxlan
->net
, ipv6
,
2783 vxlan
->cfg
.dst_port
, vxlan
->flags
);
2786 #if IS_ENABLED(CONFIG_IPV6)
2788 vxlan
->vn6_sock
= vs
;
2791 vxlan
->vn4_sock
= vs
;
2792 vxlan_vs_add_dev(vs
, vxlan
);
2796 static int vxlan_sock_add(struct vxlan_dev
*vxlan
)
2798 bool ipv6
= vxlan
->flags
& VXLAN_F_IPV6
;
2799 bool metadata
= vxlan
->flags
& VXLAN_F_COLLECT_METADATA
;
2802 vxlan
->vn4_sock
= NULL
;
2803 #if IS_ENABLED(CONFIG_IPV6)
2804 vxlan
->vn6_sock
= NULL
;
2805 if (ipv6
|| metadata
)
2806 ret
= __vxlan_sock_add(vxlan
, true);
2808 if (!ret
&& (!ipv6
|| metadata
))
2809 ret
= __vxlan_sock_add(vxlan
, false);
2811 vxlan_sock_release(vxlan
);
2815 static int vxlan_dev_configure(struct net
*src_net
, struct net_device
*dev
,
2816 struct vxlan_config
*conf
)
2818 struct vxlan_net
*vn
= net_generic(src_net
, vxlan_net_id
);
2819 struct vxlan_dev
*vxlan
= netdev_priv(dev
), *tmp
;
2820 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
2821 unsigned short needed_headroom
= ETH_HLEN
;
2823 bool use_ipv6
= false;
2824 __be16 default_port
= vxlan
->cfg
.dst_port
;
2825 struct net_device
*lowerdev
= NULL
;
2827 if (conf
->flags
& VXLAN_F_GPE
) {
2828 if (conf
->flags
& ~VXLAN_F_ALLOWED_GPE
)
2830 /* For now, allow GPE only together with COLLECT_METADATA.
2831 * This can be relaxed later; in such case, the other side
2832 * of the PtP link will have to be provided.
2834 if (!(conf
->flags
& VXLAN_F_COLLECT_METADATA
))
2837 vxlan_raw_setup(dev
);
2839 vxlan_ether_setup(dev
);
2842 vxlan
->net
= src_net
;
2844 dst
->remote_vni
= conf
->vni
;
2846 memcpy(&dst
->remote_ip
, &conf
->remote_ip
, sizeof(conf
->remote_ip
));
2848 /* Unless IPv6 is explicitly requested, assume IPv4 */
2849 if (!dst
->remote_ip
.sa
.sa_family
)
2850 dst
->remote_ip
.sa
.sa_family
= AF_INET
;
2852 if (dst
->remote_ip
.sa
.sa_family
== AF_INET6
||
2853 vxlan
->cfg
.saddr
.sa
.sa_family
== AF_INET6
) {
2854 if (!IS_ENABLED(CONFIG_IPV6
))
2855 return -EPFNOSUPPORT
;
2857 vxlan
->flags
|= VXLAN_F_IPV6
;
2860 if (conf
->label
&& !use_ipv6
) {
2861 pr_info("label only supported in use with IPv6\n");
2865 if (conf
->remote_ifindex
) {
2866 lowerdev
= __dev_get_by_index(src_net
, conf
->remote_ifindex
);
2867 dst
->remote_ifindex
= conf
->remote_ifindex
;
2870 pr_info("ifindex %d does not exist\n", dst
->remote_ifindex
);
2874 #if IS_ENABLED(CONFIG_IPV6)
2876 struct inet6_dev
*idev
= __in6_dev_get(lowerdev
);
2877 if (idev
&& idev
->cnf
.disable_ipv6
) {
2878 pr_info("IPv6 is disabled via sysctl\n");
2885 dev
->mtu
= lowerdev
->mtu
- (use_ipv6
? VXLAN6_HEADROOM
: VXLAN_HEADROOM
);
2887 needed_headroom
= lowerdev
->hard_header_len
;
2891 err
= __vxlan_change_mtu(dev
, lowerdev
, dst
, conf
->mtu
, false);
2896 if (use_ipv6
|| conf
->flags
& VXLAN_F_COLLECT_METADATA
)
2897 needed_headroom
+= VXLAN6_HEADROOM
;
2899 needed_headroom
+= VXLAN_HEADROOM
;
2900 dev
->needed_headroom
= needed_headroom
;
2902 memcpy(&vxlan
->cfg
, conf
, sizeof(*conf
));
2903 if (!vxlan
->cfg
.dst_port
) {
2904 if (conf
->flags
& VXLAN_F_GPE
)
2905 vxlan
->cfg
.dst_port
= 4790; /* IANA assigned VXLAN-GPE port */
2907 vxlan
->cfg
.dst_port
= default_port
;
2909 vxlan
->flags
|= conf
->flags
;
2911 if (!vxlan
->cfg
.age_interval
)
2912 vxlan
->cfg
.age_interval
= FDB_AGE_DEFAULT
;
2914 list_for_each_entry(tmp
, &vn
->vxlan_list
, next
) {
2915 if (tmp
->cfg
.vni
== conf
->vni
&&
2916 (tmp
->default_dst
.remote_ip
.sa
.sa_family
== AF_INET6
||
2917 tmp
->cfg
.saddr
.sa
.sa_family
== AF_INET6
) == use_ipv6
&&
2918 tmp
->cfg
.dst_port
== vxlan
->cfg
.dst_port
&&
2919 (tmp
->flags
& VXLAN_F_RCV_FLAGS
) ==
2920 (vxlan
->flags
& VXLAN_F_RCV_FLAGS
))
2924 dev
->ethtool_ops
= &vxlan_ethtool_ops
;
2926 /* create an fdb entry for a valid default destination */
2927 if (!vxlan_addr_any(&vxlan
->default_dst
.remote_ip
)) {
2928 err
= vxlan_fdb_create(vxlan
, all_zeros_mac
,
2929 &vxlan
->default_dst
.remote_ip
,
2930 NUD_REACHABLE
|NUD_PERMANENT
,
2931 NLM_F_EXCL
|NLM_F_CREATE
,
2932 vxlan
->cfg
.dst_port
,
2933 vxlan
->default_dst
.remote_vni
,
2934 vxlan
->default_dst
.remote_ifindex
,
2940 err
= register_netdevice(dev
);
2942 vxlan_fdb_delete_default(vxlan
);
2946 list_add(&vxlan
->next
, &vn
->vxlan_list
);
2951 struct net_device
*vxlan_dev_create(struct net
*net
, const char *name
,
2952 u8 name_assign_type
, struct vxlan_config
*conf
)
2954 struct nlattr
*tb
[IFLA_MAX
+1];
2955 struct net_device
*dev
;
2958 memset(&tb
, 0, sizeof(tb
));
2960 dev
= rtnl_create_link(net
, name
, name_assign_type
,
2961 &vxlan_link_ops
, tb
);
2965 err
= vxlan_dev_configure(net
, dev
, conf
);
2968 return ERR_PTR(err
);
2973 EXPORT_SYMBOL_GPL(vxlan_dev_create
);
2975 static int vxlan_newlink(struct net
*src_net
, struct net_device
*dev
,
2976 struct nlattr
*tb
[], struct nlattr
*data
[])
2978 struct vxlan_config conf
;
2981 memset(&conf
, 0, sizeof(conf
));
2983 if (data
[IFLA_VXLAN_ID
])
2984 conf
.vni
= cpu_to_be32(nla_get_u32(data
[IFLA_VXLAN_ID
]));
2986 if (data
[IFLA_VXLAN_GROUP
]) {
2987 conf
.remote_ip
.sin
.sin_addr
.s_addr
= nla_get_in_addr(data
[IFLA_VXLAN_GROUP
]);
2988 } else if (data
[IFLA_VXLAN_GROUP6
]) {
2989 if (!IS_ENABLED(CONFIG_IPV6
))
2990 return -EPFNOSUPPORT
;
2992 conf
.remote_ip
.sin6
.sin6_addr
= nla_get_in6_addr(data
[IFLA_VXLAN_GROUP6
]);
2993 conf
.remote_ip
.sa
.sa_family
= AF_INET6
;
2996 if (data
[IFLA_VXLAN_LOCAL
]) {
2997 conf
.saddr
.sin
.sin_addr
.s_addr
= nla_get_in_addr(data
[IFLA_VXLAN_LOCAL
]);
2998 conf
.saddr
.sa
.sa_family
= AF_INET
;
2999 } else if (data
[IFLA_VXLAN_LOCAL6
]) {
3000 if (!IS_ENABLED(CONFIG_IPV6
))
3001 return -EPFNOSUPPORT
;
3003 /* TODO: respect scope id */
3004 conf
.saddr
.sin6
.sin6_addr
= nla_get_in6_addr(data
[IFLA_VXLAN_LOCAL6
]);
3005 conf
.saddr
.sa
.sa_family
= AF_INET6
;
3008 if (data
[IFLA_VXLAN_LINK
])
3009 conf
.remote_ifindex
= nla_get_u32(data
[IFLA_VXLAN_LINK
]);
3011 if (data
[IFLA_VXLAN_TOS
])
3012 conf
.tos
= nla_get_u8(data
[IFLA_VXLAN_TOS
]);
3014 if (data
[IFLA_VXLAN_TTL
])
3015 conf
.ttl
= nla_get_u8(data
[IFLA_VXLAN_TTL
]);
3017 if (data
[IFLA_VXLAN_LABEL
])
3018 conf
.label
= nla_get_be32(data
[IFLA_VXLAN_LABEL
]) &
3019 IPV6_FLOWLABEL_MASK
;
3021 if (!data
[IFLA_VXLAN_LEARNING
] || nla_get_u8(data
[IFLA_VXLAN_LEARNING
]))
3022 conf
.flags
|= VXLAN_F_LEARN
;
3024 if (data
[IFLA_VXLAN_AGEING
])
3025 conf
.age_interval
= nla_get_u32(data
[IFLA_VXLAN_AGEING
]);
3027 if (data
[IFLA_VXLAN_PROXY
] && nla_get_u8(data
[IFLA_VXLAN_PROXY
]))
3028 conf
.flags
|= VXLAN_F_PROXY
;
3030 if (data
[IFLA_VXLAN_RSC
] && nla_get_u8(data
[IFLA_VXLAN_RSC
]))
3031 conf
.flags
|= VXLAN_F_RSC
;
3033 if (data
[IFLA_VXLAN_L2MISS
] && nla_get_u8(data
[IFLA_VXLAN_L2MISS
]))
3034 conf
.flags
|= VXLAN_F_L2MISS
;
3036 if (data
[IFLA_VXLAN_L3MISS
] && nla_get_u8(data
[IFLA_VXLAN_L3MISS
]))
3037 conf
.flags
|= VXLAN_F_L3MISS
;
3039 if (data
[IFLA_VXLAN_LIMIT
])
3040 conf
.addrmax
= nla_get_u32(data
[IFLA_VXLAN_LIMIT
]);
3042 if (data
[IFLA_VXLAN_COLLECT_METADATA
] &&
3043 nla_get_u8(data
[IFLA_VXLAN_COLLECT_METADATA
]))
3044 conf
.flags
|= VXLAN_F_COLLECT_METADATA
;
3046 if (data
[IFLA_VXLAN_PORT_RANGE
]) {
3047 const struct ifla_vxlan_port_range
*p
3048 = nla_data(data
[IFLA_VXLAN_PORT_RANGE
]);
3049 conf
.port_min
= ntohs(p
->low
);
3050 conf
.port_max
= ntohs(p
->high
);
3053 if (data
[IFLA_VXLAN_PORT
])
3054 conf
.dst_port
= nla_get_be16(data
[IFLA_VXLAN_PORT
]);
3056 if (data
[IFLA_VXLAN_UDP_CSUM
] &&
3057 !nla_get_u8(data
[IFLA_VXLAN_UDP_CSUM
]))
3058 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM_TX
;
3060 if (data
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
] &&
3061 nla_get_u8(data
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
]))
3062 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM6_TX
;
3064 if (data
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
] &&
3065 nla_get_u8(data
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
]))
3066 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM6_RX
;
3068 if (data
[IFLA_VXLAN_REMCSUM_TX
] &&
3069 nla_get_u8(data
[IFLA_VXLAN_REMCSUM_TX
]))
3070 conf
.flags
|= VXLAN_F_REMCSUM_TX
;
3072 if (data
[IFLA_VXLAN_REMCSUM_RX
] &&
3073 nla_get_u8(data
[IFLA_VXLAN_REMCSUM_RX
]))
3074 conf
.flags
|= VXLAN_F_REMCSUM_RX
;
3076 if (data
[IFLA_VXLAN_GBP
])
3077 conf
.flags
|= VXLAN_F_GBP
;
3079 if (data
[IFLA_VXLAN_GPE
])
3080 conf
.flags
|= VXLAN_F_GPE
;
3082 if (data
[IFLA_VXLAN_REMCSUM_NOPARTIAL
])
3083 conf
.flags
|= VXLAN_F_REMCSUM_NOPARTIAL
;
3085 err
= vxlan_dev_configure(src_net
, dev
, &conf
);
3088 pr_info("ifindex %d does not exist\n", conf
.remote_ifindex
);
3092 pr_info("IPv6 is disabled via sysctl\n");
3096 pr_info("duplicate VNI %u\n", be32_to_cpu(conf
.vni
));
3100 pr_info("unsupported combination of extensions\n");
3107 static void vxlan_dellink(struct net_device
*dev
, struct list_head
*head
)
3109 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3110 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
3112 spin_lock(&vn
->sock_lock
);
3113 if (!hlist_unhashed(&vxlan
->hlist
))
3114 hlist_del_rcu(&vxlan
->hlist
);
3115 spin_unlock(&vn
->sock_lock
);
3117 gro_cells_destroy(&vxlan
->gro_cells
);
3118 list_del(&vxlan
->next
);
3119 unregister_netdevice_queue(dev
, head
);
3122 static size_t vxlan_get_size(const struct net_device
*dev
)
3125 return nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_ID */
3126 nla_total_size(sizeof(struct in6_addr
)) + /* IFLA_VXLAN_GROUP{6} */
3127 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_LINK */
3128 nla_total_size(sizeof(struct in6_addr
)) + /* IFLA_VXLAN_LOCAL{6} */
3129 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_TTL */
3130 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_TOS */
3131 nla_total_size(sizeof(__be32
)) + /* IFLA_VXLAN_LABEL */
3132 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_LEARNING */
3133 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_PROXY */
3134 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_RSC */
3135 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_L2MISS */
3136 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_L3MISS */
3137 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_COLLECT_METADATA */
3138 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_AGEING */
3139 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_LIMIT */
3140 nla_total_size(sizeof(struct ifla_vxlan_port_range
)) +
3141 nla_total_size(sizeof(__be16
)) + /* IFLA_VXLAN_PORT */
3142 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_CSUM */
3143 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3144 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
3145 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_REMCSUM_TX */
3146 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_REMCSUM_RX */
3150 static int vxlan_fill_info(struct sk_buff
*skb
, const struct net_device
*dev
)
3152 const struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3153 const struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
3154 struct ifla_vxlan_port_range ports
= {
3155 .low
= htons(vxlan
->cfg
.port_min
),
3156 .high
= htons(vxlan
->cfg
.port_max
),
3159 if (nla_put_u32(skb
, IFLA_VXLAN_ID
, be32_to_cpu(dst
->remote_vni
)))
3160 goto nla_put_failure
;
3162 if (!vxlan_addr_any(&dst
->remote_ip
)) {
3163 if (dst
->remote_ip
.sa
.sa_family
== AF_INET
) {
3164 if (nla_put_in_addr(skb
, IFLA_VXLAN_GROUP
,
3165 dst
->remote_ip
.sin
.sin_addr
.s_addr
))
3166 goto nla_put_failure
;
3167 #if IS_ENABLED(CONFIG_IPV6)
3169 if (nla_put_in6_addr(skb
, IFLA_VXLAN_GROUP6
,
3170 &dst
->remote_ip
.sin6
.sin6_addr
))
3171 goto nla_put_failure
;
3176 if (dst
->remote_ifindex
&& nla_put_u32(skb
, IFLA_VXLAN_LINK
, dst
->remote_ifindex
))
3177 goto nla_put_failure
;
3179 if (!vxlan_addr_any(&vxlan
->cfg
.saddr
)) {
3180 if (vxlan
->cfg
.saddr
.sa
.sa_family
== AF_INET
) {
3181 if (nla_put_in_addr(skb
, IFLA_VXLAN_LOCAL
,
3182 vxlan
->cfg
.saddr
.sin
.sin_addr
.s_addr
))
3183 goto nla_put_failure
;
3184 #if IS_ENABLED(CONFIG_IPV6)
3186 if (nla_put_in6_addr(skb
, IFLA_VXLAN_LOCAL6
,
3187 &vxlan
->cfg
.saddr
.sin6
.sin6_addr
))
3188 goto nla_put_failure
;
3193 if (nla_put_u8(skb
, IFLA_VXLAN_TTL
, vxlan
->cfg
.ttl
) ||
3194 nla_put_u8(skb
, IFLA_VXLAN_TOS
, vxlan
->cfg
.tos
) ||
3195 nla_put_be32(skb
, IFLA_VXLAN_LABEL
, vxlan
->cfg
.label
) ||
3196 nla_put_u8(skb
, IFLA_VXLAN_LEARNING
,
3197 !!(vxlan
->flags
& VXLAN_F_LEARN
)) ||
3198 nla_put_u8(skb
, IFLA_VXLAN_PROXY
,
3199 !!(vxlan
->flags
& VXLAN_F_PROXY
)) ||
3200 nla_put_u8(skb
, IFLA_VXLAN_RSC
, !!(vxlan
->flags
& VXLAN_F_RSC
)) ||
3201 nla_put_u8(skb
, IFLA_VXLAN_L2MISS
,
3202 !!(vxlan
->flags
& VXLAN_F_L2MISS
)) ||
3203 nla_put_u8(skb
, IFLA_VXLAN_L3MISS
,
3204 !!(vxlan
->flags
& VXLAN_F_L3MISS
)) ||
3205 nla_put_u8(skb
, IFLA_VXLAN_COLLECT_METADATA
,
3206 !!(vxlan
->flags
& VXLAN_F_COLLECT_METADATA
)) ||
3207 nla_put_u32(skb
, IFLA_VXLAN_AGEING
, vxlan
->cfg
.age_interval
) ||
3208 nla_put_u32(skb
, IFLA_VXLAN_LIMIT
, vxlan
->cfg
.addrmax
) ||
3209 nla_put_be16(skb
, IFLA_VXLAN_PORT
, vxlan
->cfg
.dst_port
) ||
3210 nla_put_u8(skb
, IFLA_VXLAN_UDP_CSUM
,
3211 !(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM_TX
)) ||
3212 nla_put_u8(skb
, IFLA_VXLAN_UDP_ZERO_CSUM6_TX
,
3213 !!(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM6_TX
)) ||
3214 nla_put_u8(skb
, IFLA_VXLAN_UDP_ZERO_CSUM6_RX
,
3215 !!(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM6_RX
)) ||
3216 nla_put_u8(skb
, IFLA_VXLAN_REMCSUM_TX
,
3217 !!(vxlan
->flags
& VXLAN_F_REMCSUM_TX
)) ||
3218 nla_put_u8(skb
, IFLA_VXLAN_REMCSUM_RX
,
3219 !!(vxlan
->flags
& VXLAN_F_REMCSUM_RX
)))
3220 goto nla_put_failure
;
3222 if (nla_put(skb
, IFLA_VXLAN_PORT_RANGE
, sizeof(ports
), &ports
))
3223 goto nla_put_failure
;
3225 if (vxlan
->flags
& VXLAN_F_GBP
&&
3226 nla_put_flag(skb
, IFLA_VXLAN_GBP
))
3227 goto nla_put_failure
;
3229 if (vxlan
->flags
& VXLAN_F_GPE
&&
3230 nla_put_flag(skb
, IFLA_VXLAN_GPE
))
3231 goto nla_put_failure
;
3233 if (vxlan
->flags
& VXLAN_F_REMCSUM_NOPARTIAL
&&
3234 nla_put_flag(skb
, IFLA_VXLAN_REMCSUM_NOPARTIAL
))
3235 goto nla_put_failure
;
3243 static struct net
*vxlan_get_link_net(const struct net_device
*dev
)
3245 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3250 static struct rtnl_link_ops vxlan_link_ops __read_mostly
= {
3252 .maxtype
= IFLA_VXLAN_MAX
,
3253 .policy
= vxlan_policy
,
3254 .priv_size
= sizeof(struct vxlan_dev
),
3255 .setup
= vxlan_setup
,
3256 .validate
= vxlan_validate
,
3257 .newlink
= vxlan_newlink
,
3258 .dellink
= vxlan_dellink
,
3259 .get_size
= vxlan_get_size
,
3260 .fill_info
= vxlan_fill_info
,
3261 .get_link_net
= vxlan_get_link_net
,
3264 static void vxlan_handle_lowerdev_unregister(struct vxlan_net
*vn
,
3265 struct net_device
*dev
)
3267 struct vxlan_dev
*vxlan
, *next
;
3268 LIST_HEAD(list_kill
);
3270 list_for_each_entry_safe(vxlan
, next
, &vn
->vxlan_list
, next
) {
3271 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
3273 /* In case we created vxlan device with carrier
3274 * and we loose the carrier due to module unload
3275 * we also need to remove vxlan device. In other
3276 * cases, it's not necessary and remote_ifindex
3277 * is 0 here, so no matches.
3279 if (dst
->remote_ifindex
== dev
->ifindex
)
3280 vxlan_dellink(vxlan
->dev
, &list_kill
);
3283 unregister_netdevice_many(&list_kill
);
3286 static int vxlan_lowerdev_event(struct notifier_block
*unused
,
3287 unsigned long event
, void *ptr
)
3289 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3290 struct vxlan_net
*vn
= net_generic(dev_net(dev
), vxlan_net_id
);
3292 if (event
== NETDEV_UNREGISTER
)
3293 vxlan_handle_lowerdev_unregister(vn
, dev
);
3298 static struct notifier_block vxlan_notifier_block __read_mostly
= {
3299 .notifier_call
= vxlan_lowerdev_event
,
3302 static __net_init
int vxlan_init_net(struct net
*net
)
3304 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
3307 INIT_LIST_HEAD(&vn
->vxlan_list
);
3308 spin_lock_init(&vn
->sock_lock
);
3310 for (h
= 0; h
< PORT_HASH_SIZE
; ++h
)
3311 INIT_HLIST_HEAD(&vn
->sock_list
[h
]);
3316 static void __net_exit
vxlan_exit_net(struct net
*net
)
3318 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
3319 struct vxlan_dev
*vxlan
, *next
;
3320 struct net_device
*dev
, *aux
;
3324 for_each_netdev_safe(net
, dev
, aux
)
3325 if (dev
->rtnl_link_ops
== &vxlan_link_ops
)
3326 unregister_netdevice_queue(dev
, &list
);
3328 list_for_each_entry_safe(vxlan
, next
, &vn
->vxlan_list
, next
) {
3329 /* If vxlan->dev is in the same netns, it has already been added
3330 * to the list by the previous loop.
3332 if (!net_eq(dev_net(vxlan
->dev
), net
)) {
3333 gro_cells_destroy(&vxlan
->gro_cells
);
3334 unregister_netdevice_queue(vxlan
->dev
, &list
);
3338 unregister_netdevice_many(&list
);
3342 static struct pernet_operations vxlan_net_ops
= {
3343 .init
= vxlan_init_net
,
3344 .exit
= vxlan_exit_net
,
3345 .id
= &vxlan_net_id
,
3346 .size
= sizeof(struct vxlan_net
),
3349 static int __init
vxlan_init_module(void)
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
);
3375 late_initcall(vxlan_init_module
);
3377 static void __exit
vxlan_cleanup_module(void)
3379 rtnl_link_unregister(&vxlan_link_ops
);
3380 unregister_netdevice_notifier(&vxlan_notifier_block
);
3381 unregister_pernet_subsys(&vxlan_net_ops
);
3382 /* rcu_barrier() is called by netns */
3384 module_exit(vxlan_cleanup_module
);
3386 MODULE_LICENSE("GPL");
3387 MODULE_VERSION(VXLAN_VERSION
);
3388 MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
3389 MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
3390 MODULE_ALIAS_RTNL_LINK("vxlan");