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 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
;
615 f
= __vxlan_find_mac(vxlan
, mac
);
617 if (flags
& NLM_F_EXCL
) {
618 netdev_dbg(vxlan
->dev
,
619 "lost race to create %pM\n", mac
);
622 if (f
->state
!= state
) {
624 f
->updated
= jiffies
;
627 if (f
->flags
!= ndm_flags
) {
628 f
->flags
= ndm_flags
;
629 f
->updated
= jiffies
;
632 if ((flags
& NLM_F_REPLACE
)) {
633 /* Only change unicasts */
634 if (!(is_multicast_ether_addr(f
->eth_addr
) ||
635 is_zero_ether_addr(f
->eth_addr
))) {
636 notify
|= vxlan_fdb_replace(f
, ip
, port
, vni
,
641 if ((flags
& NLM_F_APPEND
) &&
642 (is_multicast_ether_addr(f
->eth_addr
) ||
643 is_zero_ether_addr(f
->eth_addr
))) {
644 int rc
= vxlan_fdb_append(f
, ip
, port
, vni
, ifindex
,
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 vxlan_fdb_append(f
, ip
, port
, vni
, ifindex
, &rd
);
679 hlist_add_head_rcu(&f
->hlist
,
680 vxlan_fdb_head(vxlan
, mac
));
685 rd
= first_remote_rtnl(f
);
686 vxlan_fdb_notify(vxlan
, f
, rd
, RTM_NEWNEIGH
);
692 static void vxlan_fdb_free(struct rcu_head
*head
)
694 struct vxlan_fdb
*f
= container_of(head
, struct vxlan_fdb
, rcu
);
695 struct vxlan_rdst
*rd
, *nd
;
697 list_for_each_entry_safe(rd
, nd
, &f
->remotes
, list
) {
698 dst_cache_destroy(&rd
->dst_cache
);
704 static void vxlan_fdb_destroy(struct vxlan_dev
*vxlan
, struct vxlan_fdb
*f
)
706 netdev_dbg(vxlan
->dev
,
707 "delete %pM\n", f
->eth_addr
);
710 vxlan_fdb_notify(vxlan
, f
, first_remote_rtnl(f
), RTM_DELNEIGH
);
712 hlist_del_rcu(&f
->hlist
);
713 call_rcu(&f
->rcu
, vxlan_fdb_free
);
716 static int vxlan_fdb_parse(struct nlattr
*tb
[], struct vxlan_dev
*vxlan
,
717 union vxlan_addr
*ip
, __be16
*port
, __be32
*vni
,
720 struct net
*net
= dev_net(vxlan
->dev
);
724 err
= vxlan_nla_get_addr(ip
, tb
[NDA_DST
]);
728 union vxlan_addr
*remote
= &vxlan
->default_dst
.remote_ip
;
729 if (remote
->sa
.sa_family
== AF_INET
) {
730 ip
->sin
.sin_addr
.s_addr
= htonl(INADDR_ANY
);
731 ip
->sa
.sa_family
= AF_INET
;
732 #if IS_ENABLED(CONFIG_IPV6)
734 ip
->sin6
.sin6_addr
= in6addr_any
;
735 ip
->sa
.sa_family
= AF_INET6
;
741 if (nla_len(tb
[NDA_PORT
]) != sizeof(__be16
))
743 *port
= nla_get_be16(tb
[NDA_PORT
]);
745 *port
= vxlan
->cfg
.dst_port
;
749 if (nla_len(tb
[NDA_VNI
]) != sizeof(u32
))
751 *vni
= cpu_to_be32(nla_get_u32(tb
[NDA_VNI
]));
753 *vni
= vxlan
->default_dst
.remote_vni
;
756 if (tb
[NDA_IFINDEX
]) {
757 struct net_device
*tdev
;
759 if (nla_len(tb
[NDA_IFINDEX
]) != sizeof(u32
))
761 *ifindex
= nla_get_u32(tb
[NDA_IFINDEX
]);
762 tdev
= __dev_get_by_index(net
, *ifindex
);
764 return -EADDRNOTAVAIL
;
772 /* Add static entry (via netlink) */
773 static int vxlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
774 struct net_device
*dev
,
775 const unsigned char *addr
, u16 vid
, u16 flags
)
777 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
778 /* struct net *net = dev_net(vxlan->dev); */
785 if (!(ndm
->ndm_state
& (NUD_PERMANENT
|NUD_REACHABLE
))) {
786 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
791 if (tb
[NDA_DST
] == NULL
)
794 err
= vxlan_fdb_parse(tb
, vxlan
, &ip
, &port
, &vni
, &ifindex
);
798 if (vxlan
->default_dst
.remote_ip
.sa
.sa_family
!= ip
.sa
.sa_family
)
799 return -EAFNOSUPPORT
;
801 spin_lock_bh(&vxlan
->hash_lock
);
802 err
= vxlan_fdb_create(vxlan
, addr
, &ip
, ndm
->ndm_state
, flags
,
803 port
, vni
, ifindex
, ndm
->ndm_flags
);
804 spin_unlock_bh(&vxlan
->hash_lock
);
809 /* Delete entry (via netlink) */
810 static int vxlan_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
811 struct net_device
*dev
,
812 const unsigned char *addr
, u16 vid
)
814 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
816 struct vxlan_rdst
*rd
= NULL
;
823 err
= vxlan_fdb_parse(tb
, vxlan
, &ip
, &port
, &vni
, &ifindex
);
829 spin_lock_bh(&vxlan
->hash_lock
);
830 f
= vxlan_find_mac(vxlan
, addr
);
834 if (!vxlan_addr_any(&ip
)) {
835 rd
= vxlan_fdb_find_rdst(f
, &ip
, port
, vni
, ifindex
);
842 /* remove a destination if it's not the only one on the list,
843 * otherwise destroy the fdb entry
845 if (rd
&& !list_is_singular(&f
->remotes
)) {
846 list_del_rcu(&rd
->list
);
847 vxlan_fdb_notify(vxlan
, f
, rd
, RTM_DELNEIGH
);
852 vxlan_fdb_destroy(vxlan
, f
);
855 spin_unlock_bh(&vxlan
->hash_lock
);
860 /* Dump forwarding table */
861 static int vxlan_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
862 struct net_device
*dev
,
863 struct net_device
*filter_dev
, int *idx
)
865 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
869 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
872 hlist_for_each_entry_rcu(f
, &vxlan
->fdb_head
[h
], hlist
) {
873 struct vxlan_rdst
*rd
;
875 list_for_each_entry_rcu(rd
, &f
->remotes
, list
) {
876 if (*idx
< cb
->args
[2])
879 err
= vxlan_fdb_info(skb
, vxlan
, f
,
880 NETLINK_CB(cb
->skb
).portid
,
895 /* Watch incoming packets to learn mapping between Ethernet address
896 * and Tunnel endpoint.
897 * Return true if packet is bogus and should be dropped.
899 static bool vxlan_snoop(struct net_device
*dev
,
900 union vxlan_addr
*src_ip
, const u8
*src_mac
)
902 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
905 f
= vxlan_find_mac(vxlan
, src_mac
);
907 struct vxlan_rdst
*rdst
= first_remote_rcu(f
);
909 if (likely(vxlan_addr_equal(&rdst
->remote_ip
, src_ip
)))
912 /* Don't migrate static entries, drop packets */
913 if (f
->state
& NUD_NOARP
)
918 "%pM migrated from %pIS to %pIS\n",
919 src_mac
, &rdst
->remote_ip
.sa
, &src_ip
->sa
);
921 rdst
->remote_ip
= *src_ip
;
922 f
->updated
= jiffies
;
923 vxlan_fdb_notify(vxlan
, f
, rdst
, RTM_NEWNEIGH
);
925 /* learned new entry */
926 spin_lock(&vxlan
->hash_lock
);
928 /* close off race between vxlan_flush and incoming packets */
929 if (netif_running(dev
))
930 vxlan_fdb_create(vxlan
, src_mac
, src_ip
,
932 NLM_F_EXCL
|NLM_F_CREATE
,
934 vxlan
->default_dst
.remote_vni
,
936 spin_unlock(&vxlan
->hash_lock
);
942 /* See if multicast group is already in use by other ID */
943 static bool vxlan_group_used(struct vxlan_net
*vn
, struct vxlan_dev
*dev
)
945 struct vxlan_dev
*vxlan
;
946 struct vxlan_sock
*sock4
;
947 #if IS_ENABLED(CONFIG_IPV6)
948 struct vxlan_sock
*sock6
;
950 unsigned short family
= dev
->default_dst
.remote_ip
.sa
.sa_family
;
952 sock4
= rtnl_dereference(dev
->vn4_sock
);
954 /* The vxlan_sock is only used by dev, leaving group has
955 * no effect on other vxlan devices.
957 if (family
== AF_INET
&& sock4
&& atomic_read(&sock4
->refcnt
) == 1)
959 #if IS_ENABLED(CONFIG_IPV6)
960 sock6
= rtnl_dereference(dev
->vn6_sock
);
961 if (family
== AF_INET6
&& sock6
&& atomic_read(&sock6
->refcnt
) == 1)
965 list_for_each_entry(vxlan
, &vn
->vxlan_list
, next
) {
966 if (!netif_running(vxlan
->dev
) || vxlan
== dev
)
969 if (family
== AF_INET
&&
970 rtnl_dereference(vxlan
->vn4_sock
) != sock4
)
972 #if IS_ENABLED(CONFIG_IPV6)
973 if (family
== AF_INET6
&&
974 rtnl_dereference(vxlan
->vn6_sock
) != sock6
)
978 if (!vxlan_addr_equal(&vxlan
->default_dst
.remote_ip
,
979 &dev
->default_dst
.remote_ip
))
982 if (vxlan
->default_dst
.remote_ifindex
!=
983 dev
->default_dst
.remote_ifindex
)
992 static bool __vxlan_sock_release_prep(struct vxlan_sock
*vs
)
994 struct vxlan_net
*vn
;
998 if (!atomic_dec_and_test(&vs
->refcnt
))
1001 vn
= net_generic(sock_net(vs
->sock
->sk
), vxlan_net_id
);
1002 spin_lock(&vn
->sock_lock
);
1003 hlist_del_rcu(&vs
->hlist
);
1004 udp_tunnel_notify_del_rx_port(vs
->sock
,
1005 (vs
->flags
& VXLAN_F_GPE
) ?
1006 UDP_TUNNEL_TYPE_VXLAN_GPE
:
1007 UDP_TUNNEL_TYPE_VXLAN
);
1008 spin_unlock(&vn
->sock_lock
);
1013 static void vxlan_sock_release(struct vxlan_dev
*vxlan
)
1015 struct vxlan_sock
*sock4
= rtnl_dereference(vxlan
->vn4_sock
);
1016 #if IS_ENABLED(CONFIG_IPV6)
1017 struct vxlan_sock
*sock6
= rtnl_dereference(vxlan
->vn6_sock
);
1019 rcu_assign_pointer(vxlan
->vn6_sock
, NULL
);
1022 rcu_assign_pointer(vxlan
->vn4_sock
, NULL
);
1025 if (__vxlan_sock_release_prep(sock4
)) {
1026 udp_tunnel_sock_release(sock4
->sock
);
1030 #if IS_ENABLED(CONFIG_IPV6)
1031 if (__vxlan_sock_release_prep(sock6
)) {
1032 udp_tunnel_sock_release(sock6
->sock
);
1038 /* Update multicast group membership when first VNI on
1039 * multicast address is brought up
1041 static int vxlan_igmp_join(struct vxlan_dev
*vxlan
)
1044 union vxlan_addr
*ip
= &vxlan
->default_dst
.remote_ip
;
1045 int ifindex
= vxlan
->default_dst
.remote_ifindex
;
1048 if (ip
->sa
.sa_family
== AF_INET
) {
1049 struct vxlan_sock
*sock4
= rtnl_dereference(vxlan
->vn4_sock
);
1050 struct ip_mreqn mreq
= {
1051 .imr_multiaddr
.s_addr
= ip
->sin
.sin_addr
.s_addr
,
1052 .imr_ifindex
= ifindex
,
1055 sk
= sock4
->sock
->sk
;
1057 ret
= ip_mc_join_group(sk
, &mreq
);
1059 #if IS_ENABLED(CONFIG_IPV6)
1061 struct vxlan_sock
*sock6
= rtnl_dereference(vxlan
->vn6_sock
);
1063 sk
= sock6
->sock
->sk
;
1065 ret
= ipv6_stub
->ipv6_sock_mc_join(sk
, ifindex
,
1066 &ip
->sin6
.sin6_addr
);
1074 /* Inverse of vxlan_igmp_join when last VNI is brought down */
1075 static int vxlan_igmp_leave(struct vxlan_dev
*vxlan
)
1078 union vxlan_addr
*ip
= &vxlan
->default_dst
.remote_ip
;
1079 int ifindex
= vxlan
->default_dst
.remote_ifindex
;
1082 if (ip
->sa
.sa_family
== AF_INET
) {
1083 struct vxlan_sock
*sock4
= rtnl_dereference(vxlan
->vn4_sock
);
1084 struct ip_mreqn mreq
= {
1085 .imr_multiaddr
.s_addr
= ip
->sin
.sin_addr
.s_addr
,
1086 .imr_ifindex
= ifindex
,
1089 sk
= sock4
->sock
->sk
;
1091 ret
= ip_mc_leave_group(sk
, &mreq
);
1093 #if IS_ENABLED(CONFIG_IPV6)
1095 struct vxlan_sock
*sock6
= rtnl_dereference(vxlan
->vn6_sock
);
1097 sk
= sock6
->sock
->sk
;
1099 ret
= ipv6_stub
->ipv6_sock_mc_drop(sk
, ifindex
,
1100 &ip
->sin6
.sin6_addr
);
1108 static bool vxlan_remcsum(struct vxlanhdr
*unparsed
,
1109 struct sk_buff
*skb
, u32 vxflags
)
1111 size_t start
, offset
;
1113 if (!(unparsed
->vx_flags
& VXLAN_HF_RCO
) || skb
->remcsum_offload
)
1116 start
= vxlan_rco_start(unparsed
->vx_vni
);
1117 offset
= start
+ vxlan_rco_offset(unparsed
->vx_vni
);
1119 if (!pskb_may_pull(skb
, offset
+ sizeof(u16
)))
1122 skb_remcsum_process(skb
, (void *)(vxlan_hdr(skb
) + 1), start
, offset
,
1123 !!(vxflags
& VXLAN_F_REMCSUM_NOPARTIAL
));
1125 unparsed
->vx_flags
&= ~VXLAN_HF_RCO
;
1126 unparsed
->vx_vni
&= VXLAN_VNI_MASK
;
1130 static void vxlan_parse_gbp_hdr(struct vxlanhdr
*unparsed
,
1131 struct sk_buff
*skb
, u32 vxflags
,
1132 struct vxlan_metadata
*md
)
1134 struct vxlanhdr_gbp
*gbp
= (struct vxlanhdr_gbp
*)unparsed
;
1135 struct metadata_dst
*tun_dst
;
1137 if (!(unparsed
->vx_flags
& VXLAN_HF_GBP
))
1140 md
->gbp
= ntohs(gbp
->policy_id
);
1142 tun_dst
= (struct metadata_dst
*)skb_dst(skb
);
1144 tun_dst
->u
.tun_info
.key
.tun_flags
|= TUNNEL_VXLAN_OPT
;
1145 tun_dst
->u
.tun_info
.options_len
= sizeof(*md
);
1147 if (gbp
->dont_learn
)
1148 md
->gbp
|= VXLAN_GBP_DONT_LEARN
;
1150 if (gbp
->policy_applied
)
1151 md
->gbp
|= VXLAN_GBP_POLICY_APPLIED
;
1153 /* In flow-based mode, GBP is carried in dst_metadata */
1154 if (!(vxflags
& VXLAN_F_COLLECT_METADATA
))
1155 skb
->mark
= md
->gbp
;
1157 unparsed
->vx_flags
&= ~VXLAN_GBP_USED_BITS
;
1160 static bool vxlan_parse_gpe_hdr(struct vxlanhdr
*unparsed
,
1162 struct sk_buff
*skb
, u32 vxflags
)
1164 struct vxlanhdr_gpe
*gpe
= (struct vxlanhdr_gpe
*)unparsed
;
1166 /* Need to have Next Protocol set for interfaces in GPE mode. */
1167 if (!gpe
->np_applied
)
1169 /* "The initial version is 0. If a receiver does not support the
1170 * version indicated it MUST drop the packet.
1172 if (gpe
->version
!= 0)
1174 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1175 * processing MUST occur." However, we don't implement OAM
1176 * processing, thus drop the packet.
1181 switch (gpe
->next_protocol
) {
1182 case VXLAN_GPE_NP_IPV4
:
1183 *protocol
= htons(ETH_P_IP
);
1185 case VXLAN_GPE_NP_IPV6
:
1186 *protocol
= htons(ETH_P_IPV6
);
1188 case VXLAN_GPE_NP_ETHERNET
:
1189 *protocol
= htons(ETH_P_TEB
);
1195 unparsed
->vx_flags
&= ~VXLAN_GPE_USED_BITS
;
1199 static bool vxlan_set_mac(struct vxlan_dev
*vxlan
,
1200 struct vxlan_sock
*vs
,
1201 struct sk_buff
*skb
)
1203 union vxlan_addr saddr
;
1205 skb_reset_mac_header(skb
);
1206 skb
->protocol
= eth_type_trans(skb
, vxlan
->dev
);
1207 skb_postpull_rcsum(skb
, eth_hdr(skb
), ETH_HLEN
);
1209 /* Ignore packet loops (and multicast echo) */
1210 if (ether_addr_equal(eth_hdr(skb
)->h_source
, vxlan
->dev
->dev_addr
))
1213 /* Get address from the outer IP header */
1214 if (vxlan_get_sk_family(vs
) == AF_INET
) {
1215 saddr
.sin
.sin_addr
.s_addr
= ip_hdr(skb
)->saddr
;
1216 saddr
.sa
.sa_family
= AF_INET
;
1217 #if IS_ENABLED(CONFIG_IPV6)
1219 saddr
.sin6
.sin6_addr
= ipv6_hdr(skb
)->saddr
;
1220 saddr
.sa
.sa_family
= AF_INET6
;
1224 if ((vxlan
->flags
& VXLAN_F_LEARN
) &&
1225 vxlan_snoop(skb
->dev
, &saddr
, eth_hdr(skb
)->h_source
))
1231 static bool vxlan_ecn_decapsulate(struct vxlan_sock
*vs
, void *oiph
,
1232 struct sk_buff
*skb
)
1236 if (vxlan_get_sk_family(vs
) == AF_INET
)
1237 err
= IP_ECN_decapsulate(oiph
, skb
);
1238 #if IS_ENABLED(CONFIG_IPV6)
1240 err
= IP6_ECN_decapsulate(oiph
, skb
);
1243 if (unlikely(err
) && log_ecn_error
) {
1244 if (vxlan_get_sk_family(vs
) == AF_INET
)
1245 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1246 &((struct iphdr
*)oiph
)->saddr
,
1247 ((struct iphdr
*)oiph
)->tos
);
1249 net_info_ratelimited("non-ECT from %pI6\n",
1250 &((struct ipv6hdr
*)oiph
)->saddr
);
1255 /* Callback from net/ipv4/udp.c to receive packets */
1256 static int vxlan_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1258 struct pcpu_sw_netstats
*stats
;
1259 struct vxlan_dev
*vxlan
;
1260 struct vxlan_sock
*vs
;
1261 struct vxlanhdr unparsed
;
1262 struct vxlan_metadata _md
;
1263 struct vxlan_metadata
*md
= &_md
;
1264 __be16 protocol
= htons(ETH_P_TEB
);
1265 bool raw_proto
= false;
1268 /* Need UDP and VXLAN header to be present */
1269 if (!pskb_may_pull(skb
, VXLAN_HLEN
))
1272 unparsed
= *vxlan_hdr(skb
);
1273 /* VNI flag always required to be set */
1274 if (!(unparsed
.vx_flags
& VXLAN_HF_VNI
)) {
1275 netdev_dbg(skb
->dev
, "invalid vxlan flags=%#x vni=%#x\n",
1276 ntohl(vxlan_hdr(skb
)->vx_flags
),
1277 ntohl(vxlan_hdr(skb
)->vx_vni
));
1278 /* Return non vxlan pkt */
1281 unparsed
.vx_flags
&= ~VXLAN_HF_VNI
;
1282 unparsed
.vx_vni
&= ~VXLAN_VNI_MASK
;
1284 vs
= rcu_dereference_sk_user_data(sk
);
1288 vxlan
= vxlan_vs_find_vni(vs
, vxlan_vni(vxlan_hdr(skb
)->vx_vni
));
1292 /* For backwards compatibility, only allow reserved fields to be
1293 * used by VXLAN extensions if explicitly requested.
1295 if (vs
->flags
& VXLAN_F_GPE
) {
1296 if (!vxlan_parse_gpe_hdr(&unparsed
, &protocol
, skb
, vs
->flags
))
1301 if (__iptunnel_pull_header(skb
, VXLAN_HLEN
, protocol
, raw_proto
,
1302 !net_eq(vxlan
->net
, dev_net(vxlan
->dev
))))
1305 if (vxlan_collect_metadata(vs
)) {
1306 __be32 vni
= vxlan_vni(vxlan_hdr(skb
)->vx_vni
);
1307 struct metadata_dst
*tun_dst
;
1309 tun_dst
= udp_tun_rx_dst(skb
, vxlan_get_sk_family(vs
), TUNNEL_KEY
,
1310 key32_to_tunnel_id(vni
), sizeof(*md
));
1315 md
= ip_tunnel_info_opts(&tun_dst
->u
.tun_info
);
1317 skb_dst_set(skb
, (struct dst_entry
*)tun_dst
);
1319 memset(md
, 0, sizeof(*md
));
1322 if (vs
->flags
& VXLAN_F_REMCSUM_RX
)
1323 if (!vxlan_remcsum(&unparsed
, skb
, vs
->flags
))
1325 if (vs
->flags
& VXLAN_F_GBP
)
1326 vxlan_parse_gbp_hdr(&unparsed
, skb
, vs
->flags
, md
);
1327 /* Note that GBP and GPE can never be active together. This is
1328 * ensured in vxlan_dev_configure.
1331 if (unparsed
.vx_flags
|| unparsed
.vx_vni
) {
1332 /* If there are any unprocessed flags remaining treat
1333 * this as a malformed packet. This behavior diverges from
1334 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1335 * in reserved fields are to be ignored. The approach here
1336 * maintains compatibility with previous stack code, and also
1337 * is more robust and provides a little more security in
1338 * adding extensions to VXLAN.
1344 if (!vxlan_set_mac(vxlan
, vs
, skb
))
1347 skb_reset_mac_header(skb
);
1348 skb
->dev
= vxlan
->dev
;
1349 skb
->pkt_type
= PACKET_HOST
;
1352 oiph
= skb_network_header(skb
);
1353 skb_reset_network_header(skb
);
1355 if (!vxlan_ecn_decapsulate(vs
, oiph
, skb
)) {
1356 ++vxlan
->dev
->stats
.rx_frame_errors
;
1357 ++vxlan
->dev
->stats
.rx_errors
;
1361 stats
= this_cpu_ptr(vxlan
->dev
->tstats
);
1362 u64_stats_update_begin(&stats
->syncp
);
1363 stats
->rx_packets
++;
1364 stats
->rx_bytes
+= skb
->len
;
1365 u64_stats_update_end(&stats
->syncp
);
1367 gro_cells_receive(&vxlan
->gro_cells
, skb
);
1371 /* Consume bad packet */
1376 static int arp_reduce(struct net_device
*dev
, struct sk_buff
*skb
)
1378 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1379 struct arphdr
*parp
;
1382 struct neighbour
*n
;
1384 if (dev
->flags
& IFF_NOARP
)
1387 if (!pskb_may_pull(skb
, arp_hdr_len(dev
))) {
1388 dev
->stats
.tx_dropped
++;
1391 parp
= arp_hdr(skb
);
1393 if ((parp
->ar_hrd
!= htons(ARPHRD_ETHER
) &&
1394 parp
->ar_hrd
!= htons(ARPHRD_IEEE802
)) ||
1395 parp
->ar_pro
!= htons(ETH_P_IP
) ||
1396 parp
->ar_op
!= htons(ARPOP_REQUEST
) ||
1397 parp
->ar_hln
!= dev
->addr_len
||
1400 arpptr
= (u8
*)parp
+ sizeof(struct arphdr
);
1402 arpptr
+= dev
->addr_len
; /* sha */
1403 memcpy(&sip
, arpptr
, sizeof(sip
));
1404 arpptr
+= sizeof(sip
);
1405 arpptr
+= dev
->addr_len
; /* tha */
1406 memcpy(&tip
, arpptr
, sizeof(tip
));
1408 if (ipv4_is_loopback(tip
) ||
1409 ipv4_is_multicast(tip
))
1412 n
= neigh_lookup(&arp_tbl
, &tip
, dev
);
1415 struct vxlan_fdb
*f
;
1416 struct sk_buff
*reply
;
1418 if (!(n
->nud_state
& NUD_CONNECTED
)) {
1423 f
= vxlan_find_mac(vxlan
, n
->ha
);
1424 if (f
&& vxlan_addr_any(&(first_remote_rcu(f
)->remote_ip
))) {
1425 /* bridge-local neighbor */
1430 reply
= arp_create(ARPOP_REPLY
, ETH_P_ARP
, sip
, dev
, tip
, sha
,
1438 skb_reset_mac_header(reply
);
1439 __skb_pull(reply
, skb_network_offset(reply
));
1440 reply
->ip_summed
= CHECKSUM_UNNECESSARY
;
1441 reply
->pkt_type
= PACKET_HOST
;
1443 if (netif_rx_ni(reply
) == NET_RX_DROP
)
1444 dev
->stats
.rx_dropped
++;
1445 } else if (vxlan
->flags
& VXLAN_F_L3MISS
) {
1446 union vxlan_addr ipa
= {
1447 .sin
.sin_addr
.s_addr
= tip
,
1448 .sin
.sin_family
= AF_INET
,
1451 vxlan_ip_miss(dev
, &ipa
);
1455 return NETDEV_TX_OK
;
1458 #if IS_ENABLED(CONFIG_IPV6)
1459 static struct sk_buff
*vxlan_na_create(struct sk_buff
*request
,
1460 struct neighbour
*n
, bool isrouter
)
1462 struct net_device
*dev
= request
->dev
;
1463 struct sk_buff
*reply
;
1464 struct nd_msg
*ns
, *na
;
1465 struct ipv6hdr
*pip6
;
1467 int na_olen
= 8; /* opt hdr + ETH_ALEN for target */
1474 len
= LL_RESERVED_SPACE(dev
) + sizeof(struct ipv6hdr
) +
1475 sizeof(*na
) + na_olen
+ dev
->needed_tailroom
;
1476 reply
= alloc_skb(len
, GFP_ATOMIC
);
1480 reply
->protocol
= htons(ETH_P_IPV6
);
1482 skb_reserve(reply
, LL_RESERVED_SPACE(request
->dev
));
1483 skb_push(reply
, sizeof(struct ethhdr
));
1484 skb_reset_mac_header(reply
);
1486 ns
= (struct nd_msg
*)skb_transport_header(request
);
1488 daddr
= eth_hdr(request
)->h_source
;
1489 ns_olen
= request
->len
- skb_transport_offset(request
) - sizeof(*ns
);
1490 for (i
= 0; i
< ns_olen
-1; i
+= (ns
->opt
[i
+1]<<3)) {
1491 if (ns
->opt
[i
] == ND_OPT_SOURCE_LL_ADDR
) {
1492 daddr
= ns
->opt
+ i
+ sizeof(struct nd_opt_hdr
);
1497 /* Ethernet header */
1498 ether_addr_copy(eth_hdr(reply
)->h_dest
, daddr
);
1499 ether_addr_copy(eth_hdr(reply
)->h_source
, n
->ha
);
1500 eth_hdr(reply
)->h_proto
= htons(ETH_P_IPV6
);
1501 reply
->protocol
= htons(ETH_P_IPV6
);
1503 skb_pull(reply
, sizeof(struct ethhdr
));
1504 skb_reset_network_header(reply
);
1505 skb_put(reply
, sizeof(struct ipv6hdr
));
1509 pip6
= ipv6_hdr(reply
);
1510 memset(pip6
, 0, sizeof(struct ipv6hdr
));
1512 pip6
->priority
= ipv6_hdr(request
)->priority
;
1513 pip6
->nexthdr
= IPPROTO_ICMPV6
;
1514 pip6
->hop_limit
= 255;
1515 pip6
->daddr
= ipv6_hdr(request
)->saddr
;
1516 pip6
->saddr
= *(struct in6_addr
*)n
->primary_key
;
1518 skb_pull(reply
, sizeof(struct ipv6hdr
));
1519 skb_reset_transport_header(reply
);
1521 na
= (struct nd_msg
*)skb_put(reply
, sizeof(*na
) + na_olen
);
1523 /* Neighbor Advertisement */
1524 memset(na
, 0, sizeof(*na
)+na_olen
);
1525 na
->icmph
.icmp6_type
= NDISC_NEIGHBOUR_ADVERTISEMENT
;
1526 na
->icmph
.icmp6_router
= isrouter
;
1527 na
->icmph
.icmp6_override
= 1;
1528 na
->icmph
.icmp6_solicited
= 1;
1529 na
->target
= ns
->target
;
1530 ether_addr_copy(&na
->opt
[2], n
->ha
);
1531 na
->opt
[0] = ND_OPT_TARGET_LL_ADDR
;
1532 na
->opt
[1] = na_olen
>> 3;
1534 na
->icmph
.icmp6_cksum
= csum_ipv6_magic(&pip6
->saddr
,
1535 &pip6
->daddr
, sizeof(*na
)+na_olen
, IPPROTO_ICMPV6
,
1536 csum_partial(na
, sizeof(*na
)+na_olen
, 0));
1538 pip6
->payload_len
= htons(sizeof(*na
)+na_olen
);
1540 skb_push(reply
, sizeof(struct ipv6hdr
));
1542 reply
->ip_summed
= CHECKSUM_UNNECESSARY
;
1547 static int neigh_reduce(struct net_device
*dev
, struct sk_buff
*skb
)
1549 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1551 const struct ipv6hdr
*iphdr
;
1552 const struct in6_addr
*saddr
, *daddr
;
1553 struct neighbour
*n
;
1554 struct inet6_dev
*in6_dev
;
1556 in6_dev
= __in6_dev_get(dev
);
1560 iphdr
= ipv6_hdr(skb
);
1561 saddr
= &iphdr
->saddr
;
1562 daddr
= &iphdr
->daddr
;
1564 msg
= (struct nd_msg
*)skb_transport_header(skb
);
1565 if (msg
->icmph
.icmp6_code
!= 0 ||
1566 msg
->icmph
.icmp6_type
!= NDISC_NEIGHBOUR_SOLICITATION
)
1569 if (ipv6_addr_loopback(daddr
) ||
1570 ipv6_addr_is_multicast(&msg
->target
))
1573 n
= neigh_lookup(ipv6_stub
->nd_tbl
, &msg
->target
, dev
);
1576 struct vxlan_fdb
*f
;
1577 struct sk_buff
*reply
;
1579 if (!(n
->nud_state
& NUD_CONNECTED
)) {
1584 f
= vxlan_find_mac(vxlan
, n
->ha
);
1585 if (f
&& vxlan_addr_any(&(first_remote_rcu(f
)->remote_ip
))) {
1586 /* bridge-local neighbor */
1591 reply
= vxlan_na_create(skb
, n
,
1592 !!(f
? f
->flags
& NTF_ROUTER
: 0));
1599 if (netif_rx_ni(reply
) == NET_RX_DROP
)
1600 dev
->stats
.rx_dropped
++;
1602 } else if (vxlan
->flags
& VXLAN_F_L3MISS
) {
1603 union vxlan_addr ipa
= {
1604 .sin6
.sin6_addr
= msg
->target
,
1605 .sin6
.sin6_family
= AF_INET6
,
1608 vxlan_ip_miss(dev
, &ipa
);
1613 return NETDEV_TX_OK
;
1617 static bool route_shortcircuit(struct net_device
*dev
, struct sk_buff
*skb
)
1619 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1620 struct neighbour
*n
;
1622 if (is_multicast_ether_addr(eth_hdr(skb
)->h_dest
))
1626 switch (ntohs(eth_hdr(skb
)->h_proto
)) {
1631 if (!pskb_may_pull(skb
, sizeof(struct iphdr
)))
1634 n
= neigh_lookup(&arp_tbl
, &pip
->daddr
, dev
);
1635 if (!n
&& (vxlan
->flags
& VXLAN_F_L3MISS
)) {
1636 union vxlan_addr ipa
= {
1637 .sin
.sin_addr
.s_addr
= pip
->daddr
,
1638 .sin
.sin_family
= AF_INET
,
1641 vxlan_ip_miss(dev
, &ipa
);
1647 #if IS_ENABLED(CONFIG_IPV6)
1650 struct ipv6hdr
*pip6
;
1652 if (!pskb_may_pull(skb
, sizeof(struct ipv6hdr
)))
1654 pip6
= ipv6_hdr(skb
);
1655 n
= neigh_lookup(ipv6_stub
->nd_tbl
, &pip6
->daddr
, dev
);
1656 if (!n
&& (vxlan
->flags
& VXLAN_F_L3MISS
)) {
1657 union vxlan_addr ipa
= {
1658 .sin6
.sin6_addr
= pip6
->daddr
,
1659 .sin6
.sin6_family
= AF_INET6
,
1662 vxlan_ip_miss(dev
, &ipa
);
1676 diff
= !ether_addr_equal(eth_hdr(skb
)->h_dest
, n
->ha
);
1678 memcpy(eth_hdr(skb
)->h_source
, eth_hdr(skb
)->h_dest
,
1680 memcpy(eth_hdr(skb
)->h_dest
, n
->ha
, dev
->addr_len
);
1689 static void vxlan_build_gbp_hdr(struct vxlanhdr
*vxh
, u32 vxflags
,
1690 struct vxlan_metadata
*md
)
1692 struct vxlanhdr_gbp
*gbp
;
1697 gbp
= (struct vxlanhdr_gbp
*)vxh
;
1698 vxh
->vx_flags
|= VXLAN_HF_GBP
;
1700 if (md
->gbp
& VXLAN_GBP_DONT_LEARN
)
1701 gbp
->dont_learn
= 1;
1703 if (md
->gbp
& VXLAN_GBP_POLICY_APPLIED
)
1704 gbp
->policy_applied
= 1;
1706 gbp
->policy_id
= htons(md
->gbp
& VXLAN_GBP_ID_MASK
);
1709 static int vxlan_build_gpe_hdr(struct vxlanhdr
*vxh
, u32 vxflags
,
1712 struct vxlanhdr_gpe
*gpe
= (struct vxlanhdr_gpe
*)vxh
;
1714 gpe
->np_applied
= 1;
1717 case htons(ETH_P_IP
):
1718 gpe
->next_protocol
= VXLAN_GPE_NP_IPV4
;
1720 case htons(ETH_P_IPV6
):
1721 gpe
->next_protocol
= VXLAN_GPE_NP_IPV6
;
1723 case htons(ETH_P_TEB
):
1724 gpe
->next_protocol
= VXLAN_GPE_NP_ETHERNET
;
1727 return -EPFNOSUPPORT
;
1730 static int vxlan_build_skb(struct sk_buff
*skb
, struct dst_entry
*dst
,
1731 int iphdr_len
, __be32 vni
,
1732 struct vxlan_metadata
*md
, u32 vxflags
,
1735 struct vxlanhdr
*vxh
;
1738 int type
= udp_sum
? SKB_GSO_UDP_TUNNEL_CSUM
: SKB_GSO_UDP_TUNNEL
;
1739 __be16 inner_protocol
= htons(ETH_P_TEB
);
1741 if ((vxflags
& VXLAN_F_REMCSUM_TX
) &&
1742 skb
->ip_summed
== CHECKSUM_PARTIAL
) {
1743 int csum_start
= skb_checksum_start_offset(skb
);
1745 if (csum_start
<= VXLAN_MAX_REMCSUM_START
&&
1746 !(csum_start
& VXLAN_RCO_SHIFT_MASK
) &&
1747 (skb
->csum_offset
== offsetof(struct udphdr
, check
) ||
1748 skb
->csum_offset
== offsetof(struct tcphdr
, check
)))
1749 type
|= SKB_GSO_TUNNEL_REMCSUM
;
1752 min_headroom
= LL_RESERVED_SPACE(dst
->dev
) + dst
->header_len
1753 + VXLAN_HLEN
+ iphdr_len
1754 + (skb_vlan_tag_present(skb
) ? VLAN_HLEN
: 0);
1756 /* Need space for new headers (invalidates iph ptr) */
1757 err
= skb_cow_head(skb
, min_headroom
);
1761 skb
= vlan_hwaccel_push_inside(skb
);
1765 err
= iptunnel_handle_offloads(skb
, type
);
1769 vxh
= (struct vxlanhdr
*) __skb_push(skb
, sizeof(*vxh
));
1770 vxh
->vx_flags
= VXLAN_HF_VNI
;
1771 vxh
->vx_vni
= vxlan_vni_field(vni
);
1773 if (type
& SKB_GSO_TUNNEL_REMCSUM
) {
1776 start
= skb_checksum_start_offset(skb
) - sizeof(struct vxlanhdr
);
1777 vxh
->vx_vni
|= vxlan_compute_rco(start
, skb
->csum_offset
);
1778 vxh
->vx_flags
|= VXLAN_HF_RCO
;
1780 if (!skb_is_gso(skb
)) {
1781 skb
->ip_summed
= CHECKSUM_NONE
;
1782 skb
->encapsulation
= 0;
1786 if (vxflags
& VXLAN_F_GBP
)
1787 vxlan_build_gbp_hdr(vxh
, vxflags
, md
);
1788 if (vxflags
& VXLAN_F_GPE
) {
1789 err
= vxlan_build_gpe_hdr(vxh
, vxflags
, skb
->protocol
);
1792 inner_protocol
= skb
->protocol
;
1795 skb_set_inner_protocol(skb
, inner_protocol
);
1803 static struct rtable
*vxlan_get_route(struct vxlan_dev
*vxlan
,
1804 struct sk_buff
*skb
, int oif
, u8 tos
,
1805 __be32 daddr
, __be32
*saddr
,
1806 struct dst_cache
*dst_cache
,
1807 const struct ip_tunnel_info
*info
)
1809 bool use_cache
= ip_tunnel_dst_cache_usable(skb
, info
);
1810 struct rtable
*rt
= NULL
;
1816 rt
= dst_cache_get_ip4(dst_cache
, saddr
);
1821 memset(&fl4
, 0, sizeof(fl4
));
1822 fl4
.flowi4_oif
= oif
;
1823 fl4
.flowi4_tos
= RT_TOS(tos
);
1824 fl4
.flowi4_mark
= skb
->mark
;
1825 fl4
.flowi4_proto
= IPPROTO_UDP
;
1829 rt
= ip_route_output_key(vxlan
->net
, &fl4
);
1833 dst_cache_set_ip4(dst_cache
, &rt
->dst
, fl4
.saddr
);
1838 #if IS_ENABLED(CONFIG_IPV6)
1839 static struct dst_entry
*vxlan6_get_route(struct vxlan_dev
*vxlan
,
1840 struct sk_buff
*skb
, int oif
, u8 tos
,
1842 const struct in6_addr
*daddr
,
1843 struct in6_addr
*saddr
,
1844 struct dst_cache
*dst_cache
,
1845 const struct ip_tunnel_info
*info
)
1847 struct vxlan_sock
*sock6
= rcu_dereference(vxlan
->vn6_sock
);
1848 bool use_cache
= ip_tunnel_dst_cache_usable(skb
, info
);
1849 struct dst_entry
*ndst
;
1854 return ERR_PTR(-EIO
);
1859 ndst
= dst_cache_get_ip6(dst_cache
, saddr
);
1864 memset(&fl6
, 0, sizeof(fl6
));
1865 fl6
.flowi6_oif
= oif
;
1868 fl6
.flowlabel
= ip6_make_flowinfo(RT_TOS(tos
), label
);
1869 fl6
.flowi6_mark
= skb
->mark
;
1870 fl6
.flowi6_proto
= IPPROTO_UDP
;
1872 err
= ipv6_stub
->ipv6_dst_lookup(vxlan
->net
,
1876 return ERR_PTR(err
);
1880 dst_cache_set_ip6(dst_cache
, ndst
, saddr
);
1885 /* Bypass encapsulation if the destination is local */
1886 static void vxlan_encap_bypass(struct sk_buff
*skb
, struct vxlan_dev
*src_vxlan
,
1887 struct vxlan_dev
*dst_vxlan
)
1889 struct pcpu_sw_netstats
*tx_stats
, *rx_stats
;
1890 union vxlan_addr loopback
;
1891 union vxlan_addr
*remote_ip
= &dst_vxlan
->default_dst
.remote_ip
;
1892 struct net_device
*dev
= skb
->dev
;
1895 tx_stats
= this_cpu_ptr(src_vxlan
->dev
->tstats
);
1896 rx_stats
= this_cpu_ptr(dst_vxlan
->dev
->tstats
);
1897 skb
->pkt_type
= PACKET_HOST
;
1898 skb
->encapsulation
= 0;
1899 skb
->dev
= dst_vxlan
->dev
;
1900 __skb_pull(skb
, skb_network_offset(skb
));
1902 if (remote_ip
->sa
.sa_family
== AF_INET
) {
1903 loopback
.sin
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
1904 loopback
.sa
.sa_family
= AF_INET
;
1905 #if IS_ENABLED(CONFIG_IPV6)
1907 loopback
.sin6
.sin6_addr
= in6addr_loopback
;
1908 loopback
.sa
.sa_family
= AF_INET6
;
1912 if (dst_vxlan
->flags
& VXLAN_F_LEARN
)
1913 vxlan_snoop(skb
->dev
, &loopback
, eth_hdr(skb
)->h_source
);
1915 u64_stats_update_begin(&tx_stats
->syncp
);
1916 tx_stats
->tx_packets
++;
1917 tx_stats
->tx_bytes
+= len
;
1918 u64_stats_update_end(&tx_stats
->syncp
);
1920 if (netif_rx(skb
) == NET_RX_SUCCESS
) {
1921 u64_stats_update_begin(&rx_stats
->syncp
);
1922 rx_stats
->rx_packets
++;
1923 rx_stats
->rx_bytes
+= len
;
1924 u64_stats_update_end(&rx_stats
->syncp
);
1926 dev
->stats
.rx_dropped
++;
1930 static void vxlan_xmit_one(struct sk_buff
*skb
, struct net_device
*dev
,
1931 struct vxlan_rdst
*rdst
, bool did_rsc
)
1933 struct dst_cache
*dst_cache
;
1934 struct ip_tunnel_info
*info
;
1935 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
1937 struct rtable
*rt
= NULL
;
1938 const struct iphdr
*old_iph
;
1939 union vxlan_addr
*dst
;
1940 union vxlan_addr remote_ip
, local_ip
;
1941 union vxlan_addr
*src
;
1942 struct vxlan_metadata _md
;
1943 struct vxlan_metadata
*md
= &_md
;
1944 __be16 src_port
= 0, dst_port
;
1949 u32 flags
= vxlan
->flags
;
1950 bool udp_sum
= false;
1951 bool xnet
= !net_eq(vxlan
->net
, dev_net(vxlan
->dev
));
1953 info
= skb_tunnel_info(skb
);
1956 dst_port
= rdst
->remote_port
? rdst
->remote_port
: vxlan
->cfg
.dst_port
;
1957 vni
= rdst
->remote_vni
;
1958 dst
= &rdst
->remote_ip
;
1959 src
= &vxlan
->cfg
.saddr
;
1960 dst_cache
= &rdst
->dst_cache
;
1963 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1967 dst_port
= info
->key
.tp_dst
? : vxlan
->cfg
.dst_port
;
1968 vni
= tunnel_id_to_key32(info
->key
.tun_id
);
1969 remote_ip
.sa
.sa_family
= ip_tunnel_info_af(info
);
1970 if (remote_ip
.sa
.sa_family
== AF_INET
) {
1971 remote_ip
.sin
.sin_addr
.s_addr
= info
->key
.u
.ipv4
.dst
;
1972 local_ip
.sin
.sin_addr
.s_addr
= info
->key
.u
.ipv4
.src
;
1974 remote_ip
.sin6
.sin6_addr
= info
->key
.u
.ipv6
.dst
;
1975 local_ip
.sin6
.sin6_addr
= info
->key
.u
.ipv6
.src
;
1979 dst_cache
= &info
->dst_cache
;
1982 if (vxlan_addr_any(dst
)) {
1984 /* short-circuited back to local bridge */
1985 vxlan_encap_bypass(skb
, vxlan
, vxlan
);
1991 old_iph
= ip_hdr(skb
);
1993 ttl
= vxlan
->cfg
.ttl
;
1994 if (!ttl
&& vxlan_addr_multicast(dst
))
1997 tos
= vxlan
->cfg
.tos
;
1999 tos
= ip_tunnel_get_dsfield(old_iph
, skb
);
2001 label
= vxlan
->cfg
.label
;
2002 src_port
= udp_flow_src_port(dev_net(dev
), skb
, vxlan
->cfg
.port_min
,
2003 vxlan
->cfg
.port_max
, true);
2006 ttl
= info
->key
.ttl
;
2007 tos
= info
->key
.tos
;
2008 label
= info
->key
.label
;
2009 udp_sum
= !!(info
->key
.tun_flags
& TUNNEL_CSUM
);
2011 if (info
->options_len
)
2012 md
= ip_tunnel_info_opts(info
);
2014 md
->gbp
= skb
->mark
;
2017 if (dst
->sa
.sa_family
== AF_INET
) {
2018 struct vxlan_sock
*sock4
= rcu_dereference(vxlan
->vn4_sock
);
2022 sk
= sock4
->sock
->sk
;
2024 rt
= vxlan_get_route(vxlan
, skb
,
2025 rdst
? rdst
->remote_ifindex
: 0, tos
,
2026 dst
->sin
.sin_addr
.s_addr
,
2027 &src
->sin
.sin_addr
.s_addr
,
2030 netdev_dbg(dev
, "no route to %pI4\n",
2031 &dst
->sin
.sin_addr
.s_addr
);
2032 dev
->stats
.tx_carrier_errors
++;
2036 if (rt
->dst
.dev
== dev
) {
2037 netdev_dbg(dev
, "circular route to %pI4\n",
2038 &dst
->sin
.sin_addr
.s_addr
);
2039 dev
->stats
.collisions
++;
2043 /* Bypass encapsulation if the destination is local */
2044 if (!info
&& rt
->rt_flags
& RTCF_LOCAL
&&
2045 !(rt
->rt_flags
& (RTCF_BROADCAST
| RTCF_MULTICAST
))) {
2046 struct vxlan_dev
*dst_vxlan
;
2049 dst_vxlan
= vxlan_find_vni(vxlan
->net
, vni
,
2050 dst
->sa
.sa_family
, dst_port
,
2054 vxlan_encap_bypass(skb
, vxlan
, dst_vxlan
);
2059 udp_sum
= !(flags
& VXLAN_F_UDP_ZERO_CSUM_TX
);
2060 else if (info
->key
.tun_flags
& TUNNEL_DONT_FRAGMENT
)
2063 tos
= ip_tunnel_ecn_encap(tos
, old_iph
, skb
);
2064 ttl
= ttl
? : ip4_dst_hoplimit(&rt
->dst
);
2065 err
= vxlan_build_skb(skb
, &rt
->dst
, sizeof(struct iphdr
),
2066 vni
, md
, flags
, udp_sum
);
2070 udp_tunnel_xmit_skb(rt
, sk
, skb
, src
->sin
.sin_addr
.s_addr
,
2071 dst
->sin
.sin_addr
.s_addr
, tos
, ttl
, df
,
2072 src_port
, dst_port
, xnet
, !udp_sum
);
2073 #if IS_ENABLED(CONFIG_IPV6)
2075 struct vxlan_sock
*sock6
= rcu_dereference(vxlan
->vn6_sock
);
2076 struct dst_entry
*ndst
;
2081 sk
= sock6
->sock
->sk
;
2083 ndst
= vxlan6_get_route(vxlan
, skb
,
2084 rdst
? rdst
->remote_ifindex
: 0, tos
,
2085 label
, &dst
->sin6
.sin6_addr
,
2086 &src
->sin6
.sin6_addr
,
2089 netdev_dbg(dev
, "no route to %pI6\n",
2090 &dst
->sin6
.sin6_addr
);
2091 dev
->stats
.tx_carrier_errors
++;
2095 if (ndst
->dev
== dev
) {
2096 netdev_dbg(dev
, "circular route to %pI6\n",
2097 &dst
->sin6
.sin6_addr
);
2099 dev
->stats
.collisions
++;
2103 /* Bypass encapsulation if the destination is local */
2104 rt6i_flags
= ((struct rt6_info
*)ndst
)->rt6i_flags
;
2105 if (!info
&& rt6i_flags
& RTF_LOCAL
&&
2106 !(rt6i_flags
& (RTCF_BROADCAST
| RTCF_MULTICAST
))) {
2107 struct vxlan_dev
*dst_vxlan
;
2110 dst_vxlan
= vxlan_find_vni(vxlan
->net
, vni
,
2111 dst
->sa
.sa_family
, dst_port
,
2115 vxlan_encap_bypass(skb
, vxlan
, dst_vxlan
);
2120 udp_sum
= !(flags
& VXLAN_F_UDP_ZERO_CSUM6_TX
);
2122 tos
= ip_tunnel_ecn_encap(tos
, old_iph
, skb
);
2123 ttl
= ttl
? : ip6_dst_hoplimit(ndst
);
2124 skb_scrub_packet(skb
, xnet
);
2125 err
= vxlan_build_skb(skb
, ndst
, sizeof(struct ipv6hdr
),
2126 vni
, md
, flags
, udp_sum
);
2129 dev
->stats
.tx_errors
++;
2132 udp_tunnel6_xmit_skb(ndst
, sk
, skb
, dev
,
2133 &src
->sin6
.sin6_addr
,
2134 &dst
->sin6
.sin6_addr
, tos
, ttl
,
2135 label
, src_port
, dst_port
, !udp_sum
);
2142 dev
->stats
.tx_dropped
++;
2146 /* skb is already freed. */
2151 dev
->stats
.tx_errors
++;
2156 /* Transmit local packets over Vxlan
2158 * Outer IP header inherits ECN and DF from inner header.
2159 * Outer UDP destination is the VXLAN assigned port.
2160 * source port is based on hash of flow
2162 static netdev_tx_t
vxlan_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
2164 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2165 const struct ip_tunnel_info
*info
;
2167 bool did_rsc
= false;
2168 struct vxlan_rdst
*rdst
, *fdst
= NULL
;
2169 struct vxlan_fdb
*f
;
2171 info
= skb_tunnel_info(skb
);
2173 skb_reset_mac_header(skb
);
2175 if (vxlan
->flags
& VXLAN_F_COLLECT_METADATA
) {
2176 if (info
&& info
->mode
& IP_TUNNEL_INFO_TX
)
2177 vxlan_xmit_one(skb
, dev
, NULL
, false);
2180 return NETDEV_TX_OK
;
2183 if (vxlan
->flags
& VXLAN_F_PROXY
) {
2185 if (ntohs(eth
->h_proto
) == ETH_P_ARP
)
2186 return arp_reduce(dev
, skb
);
2187 #if IS_ENABLED(CONFIG_IPV6)
2188 else if (ntohs(eth
->h_proto
) == ETH_P_IPV6
&&
2189 pskb_may_pull(skb
, sizeof(struct ipv6hdr
)
2190 + sizeof(struct nd_msg
)) &&
2191 ipv6_hdr(skb
)->nexthdr
== IPPROTO_ICMPV6
) {
2194 msg
= (struct nd_msg
*)skb_transport_header(skb
);
2195 if (msg
->icmph
.icmp6_code
== 0 &&
2196 msg
->icmph
.icmp6_type
== NDISC_NEIGHBOUR_SOLICITATION
)
2197 return neigh_reduce(dev
, skb
);
2203 f
= vxlan_find_mac(vxlan
, eth
->h_dest
);
2206 if (f
&& (f
->flags
& NTF_ROUTER
) && (vxlan
->flags
& VXLAN_F_RSC
) &&
2207 (ntohs(eth
->h_proto
) == ETH_P_IP
||
2208 ntohs(eth
->h_proto
) == ETH_P_IPV6
)) {
2209 did_rsc
= route_shortcircuit(dev
, skb
);
2211 f
= vxlan_find_mac(vxlan
, eth
->h_dest
);
2215 f
= vxlan_find_mac(vxlan
, all_zeros_mac
);
2217 if ((vxlan
->flags
& VXLAN_F_L2MISS
) &&
2218 !is_multicast_ether_addr(eth
->h_dest
))
2219 vxlan_fdb_miss(vxlan
, eth
->h_dest
);
2221 dev
->stats
.tx_dropped
++;
2223 return NETDEV_TX_OK
;
2227 list_for_each_entry_rcu(rdst
, &f
->remotes
, list
) {
2228 struct sk_buff
*skb1
;
2234 skb1
= skb_clone(skb
, GFP_ATOMIC
);
2236 vxlan_xmit_one(skb1
, dev
, rdst
, did_rsc
);
2240 vxlan_xmit_one(skb
, dev
, fdst
, did_rsc
);
2243 return NETDEV_TX_OK
;
2246 /* Walk the forwarding table and purge stale entries */
2247 static void vxlan_cleanup(unsigned long arg
)
2249 struct vxlan_dev
*vxlan
= (struct vxlan_dev
*) arg
;
2250 unsigned long next_timer
= jiffies
+ FDB_AGE_INTERVAL
;
2253 if (!netif_running(vxlan
->dev
))
2256 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
2257 struct hlist_node
*p
, *n
;
2259 spin_lock_bh(&vxlan
->hash_lock
);
2260 hlist_for_each_safe(p
, n
, &vxlan
->fdb_head
[h
]) {
2262 = container_of(p
, struct vxlan_fdb
, hlist
);
2263 unsigned long timeout
;
2265 if (f
->state
& NUD_PERMANENT
)
2268 timeout
= f
->used
+ vxlan
->cfg
.age_interval
* HZ
;
2269 if (time_before_eq(timeout
, jiffies
)) {
2270 netdev_dbg(vxlan
->dev
,
2271 "garbage collect %pM\n",
2273 f
->state
= NUD_STALE
;
2274 vxlan_fdb_destroy(vxlan
, f
);
2275 } else if (time_before(timeout
, next_timer
))
2276 next_timer
= timeout
;
2278 spin_unlock_bh(&vxlan
->hash_lock
);
2281 mod_timer(&vxlan
->age_timer
, next_timer
);
2284 static void vxlan_vs_add_dev(struct vxlan_sock
*vs
, struct vxlan_dev
*vxlan
)
2286 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2287 __be32 vni
= vxlan
->default_dst
.remote_vni
;
2289 spin_lock(&vn
->sock_lock
);
2290 hlist_add_head_rcu(&vxlan
->hlist
, vni_head(vs
, vni
));
2291 spin_unlock(&vn
->sock_lock
);
2294 /* Setup stats when device is created */
2295 static int vxlan_init(struct net_device
*dev
)
2297 dev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
2304 static void vxlan_fdb_delete_default(struct vxlan_dev
*vxlan
)
2306 struct vxlan_fdb
*f
;
2308 spin_lock_bh(&vxlan
->hash_lock
);
2309 f
= __vxlan_find_mac(vxlan
, all_zeros_mac
);
2311 vxlan_fdb_destroy(vxlan
, f
);
2312 spin_unlock_bh(&vxlan
->hash_lock
);
2315 static void vxlan_uninit(struct net_device
*dev
)
2317 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2319 vxlan_fdb_delete_default(vxlan
);
2321 free_percpu(dev
->tstats
);
2324 /* Start ageing timer and join group when device is brought up */
2325 static int vxlan_open(struct net_device
*dev
)
2327 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2330 ret
= vxlan_sock_add(vxlan
);
2334 if (vxlan_addr_multicast(&vxlan
->default_dst
.remote_ip
)) {
2335 ret
= vxlan_igmp_join(vxlan
);
2336 if (ret
== -EADDRINUSE
)
2339 vxlan_sock_release(vxlan
);
2344 if (vxlan
->cfg
.age_interval
)
2345 mod_timer(&vxlan
->age_timer
, jiffies
+ FDB_AGE_INTERVAL
);
2350 /* Purge the forwarding table */
2351 static void vxlan_flush(struct vxlan_dev
*vxlan
)
2355 spin_lock_bh(&vxlan
->hash_lock
);
2356 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
) {
2357 struct hlist_node
*p
, *n
;
2358 hlist_for_each_safe(p
, n
, &vxlan
->fdb_head
[h
]) {
2360 = container_of(p
, struct vxlan_fdb
, hlist
);
2361 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2362 if (!is_zero_ether_addr(f
->eth_addr
))
2363 vxlan_fdb_destroy(vxlan
, f
);
2366 spin_unlock_bh(&vxlan
->hash_lock
);
2369 /* Cleanup timer and forwarding table on shutdown */
2370 static int vxlan_stop(struct net_device
*dev
)
2372 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2373 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2376 if (vxlan_addr_multicast(&vxlan
->default_dst
.remote_ip
) &&
2377 !vxlan_group_used(vn
, vxlan
))
2378 ret
= vxlan_igmp_leave(vxlan
);
2380 del_timer_sync(&vxlan
->age_timer
);
2383 vxlan_sock_release(vxlan
);
2388 /* Stub, nothing needs to be done. */
2389 static void vxlan_set_multicast_list(struct net_device
*dev
)
2393 static int vxlan_change_mtu(struct net_device
*dev
, int new_mtu
)
2395 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2396 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
2397 struct net_device
*lowerdev
= __dev_get_by_index(vxlan
->net
,
2398 dst
->remote_ifindex
);
2399 bool use_ipv6
= false;
2401 if (dst
->remote_ip
.sa
.sa_family
== AF_INET6
)
2404 /* This check is different than dev->max_mtu, because it looks at
2405 * the lowerdev->mtu, rather than the static dev->max_mtu
2408 int max_mtu
= lowerdev
->mtu
-
2409 (use_ipv6
? VXLAN6_HEADROOM
: VXLAN_HEADROOM
);
2410 if (new_mtu
> max_mtu
)
2418 static int vxlan_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
)
2420 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2421 struct ip_tunnel_info
*info
= skb_tunnel_info(skb
);
2422 __be16 sport
, dport
;
2424 sport
= udp_flow_src_port(dev_net(dev
), skb
, vxlan
->cfg
.port_min
,
2425 vxlan
->cfg
.port_max
, true);
2426 dport
= info
->key
.tp_dst
? : vxlan
->cfg
.dst_port
;
2428 if (ip_tunnel_info_af(info
) == AF_INET
) {
2429 struct vxlan_sock
*sock4
= rcu_dereference(vxlan
->vn4_sock
);
2434 rt
= vxlan_get_route(vxlan
, skb
, 0, info
->key
.tos
,
2435 info
->key
.u
.ipv4
.dst
,
2436 &info
->key
.u
.ipv4
.src
, NULL
, info
);
2441 #if IS_ENABLED(CONFIG_IPV6)
2442 struct dst_entry
*ndst
;
2444 ndst
= vxlan6_get_route(vxlan
, skb
, 0, info
->key
.tos
,
2445 info
->key
.label
, &info
->key
.u
.ipv6
.dst
,
2446 &info
->key
.u
.ipv6
.src
, NULL
, info
);
2448 return PTR_ERR(ndst
);
2450 #else /* !CONFIG_IPV6 */
2451 return -EPFNOSUPPORT
;
2454 info
->key
.tp_src
= sport
;
2455 info
->key
.tp_dst
= dport
;
2459 static const struct net_device_ops vxlan_netdev_ether_ops
= {
2460 .ndo_init
= vxlan_init
,
2461 .ndo_uninit
= vxlan_uninit
,
2462 .ndo_open
= vxlan_open
,
2463 .ndo_stop
= vxlan_stop
,
2464 .ndo_start_xmit
= vxlan_xmit
,
2465 .ndo_get_stats64
= ip_tunnel_get_stats64
,
2466 .ndo_set_rx_mode
= vxlan_set_multicast_list
,
2467 .ndo_change_mtu
= vxlan_change_mtu
,
2468 .ndo_validate_addr
= eth_validate_addr
,
2469 .ndo_set_mac_address
= eth_mac_addr
,
2470 .ndo_fdb_add
= vxlan_fdb_add
,
2471 .ndo_fdb_del
= vxlan_fdb_delete
,
2472 .ndo_fdb_dump
= vxlan_fdb_dump
,
2473 .ndo_fill_metadata_dst
= vxlan_fill_metadata_dst
,
2476 static const struct net_device_ops vxlan_netdev_raw_ops
= {
2477 .ndo_init
= vxlan_init
,
2478 .ndo_uninit
= vxlan_uninit
,
2479 .ndo_open
= vxlan_open
,
2480 .ndo_stop
= vxlan_stop
,
2481 .ndo_start_xmit
= vxlan_xmit
,
2482 .ndo_get_stats64
= ip_tunnel_get_stats64
,
2483 .ndo_change_mtu
= vxlan_change_mtu
,
2484 .ndo_fill_metadata_dst
= vxlan_fill_metadata_dst
,
2487 /* Info for udev, that this is a virtual tunnel endpoint */
2488 static struct device_type vxlan_type
= {
2492 /* Calls the ndo_udp_tunnel_add of the caller in order to
2493 * supply the listening VXLAN udp ports. Callers are expected
2494 * to implement the ndo_udp_tunnel_add.
2496 static void vxlan_push_rx_ports(struct net_device
*dev
)
2498 struct vxlan_sock
*vs
;
2499 struct net
*net
= dev_net(dev
);
2500 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
2503 spin_lock(&vn
->sock_lock
);
2504 for (i
= 0; i
< PORT_HASH_SIZE
; ++i
) {
2505 hlist_for_each_entry_rcu(vs
, &vn
->sock_list
[i
], hlist
)
2506 udp_tunnel_push_rx_port(dev
, vs
->sock
,
2507 (vs
->flags
& VXLAN_F_GPE
) ?
2508 UDP_TUNNEL_TYPE_VXLAN_GPE
:
2509 UDP_TUNNEL_TYPE_VXLAN
);
2511 spin_unlock(&vn
->sock_lock
);
2514 /* Initialize the device structure. */
2515 static void vxlan_setup(struct net_device
*dev
)
2517 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
2520 eth_hw_addr_random(dev
);
2523 dev
->destructor
= free_netdev
;
2524 SET_NETDEV_DEVTYPE(dev
, &vxlan_type
);
2526 dev
->features
|= NETIF_F_LLTX
;
2527 dev
->features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
;
2528 dev
->features
|= NETIF_F_RXCSUM
;
2529 dev
->features
|= NETIF_F_GSO_SOFTWARE
;
2531 dev
->vlan_features
= dev
->features
;
2532 dev
->features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_STAG_TX
;
2533 dev
->hw_features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
| NETIF_F_RXCSUM
;
2534 dev
->hw_features
|= NETIF_F_GSO_SOFTWARE
;
2535 dev
->hw_features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_STAG_TX
;
2536 netif_keep_dst(dev
);
2537 dev
->priv_flags
|= IFF_NO_QUEUE
;
2539 INIT_LIST_HEAD(&vxlan
->next
);
2540 spin_lock_init(&vxlan
->hash_lock
);
2542 init_timer_deferrable(&vxlan
->age_timer
);
2543 vxlan
->age_timer
.function
= vxlan_cleanup
;
2544 vxlan
->age_timer
.data
= (unsigned long) vxlan
;
2546 vxlan
->cfg
.dst_port
= htons(vxlan_port
);
2550 gro_cells_init(&vxlan
->gro_cells
, dev
);
2552 for (h
= 0; h
< FDB_HASH_SIZE
; ++h
)
2553 INIT_HLIST_HEAD(&vxlan
->fdb_head
[h
]);
2556 static void vxlan_ether_setup(struct net_device
*dev
)
2558 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
2559 dev
->priv_flags
|= IFF_LIVE_ADDR_CHANGE
;
2560 dev
->netdev_ops
= &vxlan_netdev_ether_ops
;
2563 static void vxlan_raw_setup(struct net_device
*dev
)
2565 dev
->header_ops
= NULL
;
2566 dev
->type
= ARPHRD_NONE
;
2567 dev
->hard_header_len
= 0;
2569 dev
->flags
= IFF_POINTOPOINT
| IFF_NOARP
| IFF_MULTICAST
;
2570 dev
->netdev_ops
= &vxlan_netdev_raw_ops
;
2573 static const struct nla_policy vxlan_policy
[IFLA_VXLAN_MAX
+ 1] = {
2574 [IFLA_VXLAN_ID
] = { .type
= NLA_U32
},
2575 [IFLA_VXLAN_GROUP
] = { .len
= FIELD_SIZEOF(struct iphdr
, daddr
) },
2576 [IFLA_VXLAN_GROUP6
] = { .len
= sizeof(struct in6_addr
) },
2577 [IFLA_VXLAN_LINK
] = { .type
= NLA_U32
},
2578 [IFLA_VXLAN_LOCAL
] = { .len
= FIELD_SIZEOF(struct iphdr
, saddr
) },
2579 [IFLA_VXLAN_LOCAL6
] = { .len
= sizeof(struct in6_addr
) },
2580 [IFLA_VXLAN_TOS
] = { .type
= NLA_U8
},
2581 [IFLA_VXLAN_TTL
] = { .type
= NLA_U8
},
2582 [IFLA_VXLAN_LABEL
] = { .type
= NLA_U32
},
2583 [IFLA_VXLAN_LEARNING
] = { .type
= NLA_U8
},
2584 [IFLA_VXLAN_AGEING
] = { .type
= NLA_U32
},
2585 [IFLA_VXLAN_LIMIT
] = { .type
= NLA_U32
},
2586 [IFLA_VXLAN_PORT_RANGE
] = { .len
= sizeof(struct ifla_vxlan_port_range
) },
2587 [IFLA_VXLAN_PROXY
] = { .type
= NLA_U8
},
2588 [IFLA_VXLAN_RSC
] = { .type
= NLA_U8
},
2589 [IFLA_VXLAN_L2MISS
] = { .type
= NLA_U8
},
2590 [IFLA_VXLAN_L3MISS
] = { .type
= NLA_U8
},
2591 [IFLA_VXLAN_COLLECT_METADATA
] = { .type
= NLA_U8
},
2592 [IFLA_VXLAN_PORT
] = { .type
= NLA_U16
},
2593 [IFLA_VXLAN_UDP_CSUM
] = { .type
= NLA_U8
},
2594 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX
] = { .type
= NLA_U8
},
2595 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX
] = { .type
= NLA_U8
},
2596 [IFLA_VXLAN_REMCSUM_TX
] = { .type
= NLA_U8
},
2597 [IFLA_VXLAN_REMCSUM_RX
] = { .type
= NLA_U8
},
2598 [IFLA_VXLAN_GBP
] = { .type
= NLA_FLAG
, },
2599 [IFLA_VXLAN_GPE
] = { .type
= NLA_FLAG
, },
2600 [IFLA_VXLAN_REMCSUM_NOPARTIAL
] = { .type
= NLA_FLAG
},
2603 static int vxlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
2605 if (tb
[IFLA_ADDRESS
]) {
2606 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
) {
2607 pr_debug("invalid link address (not ethernet)\n");
2611 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
]))) {
2612 pr_debug("invalid all zero ethernet address\n");
2613 return -EADDRNOTAVAIL
;
2620 if (data
[IFLA_VXLAN_ID
]) {
2621 __u32 id
= nla_get_u32(data
[IFLA_VXLAN_ID
]);
2622 if (id
>= VXLAN_VID_MASK
)
2626 if (data
[IFLA_VXLAN_PORT_RANGE
]) {
2627 const struct ifla_vxlan_port_range
*p
2628 = nla_data(data
[IFLA_VXLAN_PORT_RANGE
]);
2630 if (ntohs(p
->high
) < ntohs(p
->low
)) {
2631 pr_debug("port range %u .. %u not valid\n",
2632 ntohs(p
->low
), ntohs(p
->high
));
2640 static void vxlan_get_drvinfo(struct net_device
*netdev
,
2641 struct ethtool_drvinfo
*drvinfo
)
2643 strlcpy(drvinfo
->version
, VXLAN_VERSION
, sizeof(drvinfo
->version
));
2644 strlcpy(drvinfo
->driver
, "vxlan", sizeof(drvinfo
->driver
));
2647 static const struct ethtool_ops vxlan_ethtool_ops
= {
2648 .get_drvinfo
= vxlan_get_drvinfo
,
2649 .get_link
= ethtool_op_get_link
,
2652 static struct socket
*vxlan_create_sock(struct net
*net
, bool ipv6
,
2653 __be16 port
, u32 flags
)
2655 struct socket
*sock
;
2656 struct udp_port_cfg udp_conf
;
2659 memset(&udp_conf
, 0, sizeof(udp_conf
));
2662 udp_conf
.family
= AF_INET6
;
2663 udp_conf
.use_udp6_rx_checksums
=
2664 !(flags
& VXLAN_F_UDP_ZERO_CSUM6_RX
);
2665 udp_conf
.ipv6_v6only
= 1;
2667 udp_conf
.family
= AF_INET
;
2670 udp_conf
.local_udp_port
= port
;
2672 /* Open UDP socket */
2673 err
= udp_sock_create(net
, &udp_conf
, &sock
);
2675 return ERR_PTR(err
);
2680 /* Create new listen socket if needed */
2681 static struct vxlan_sock
*vxlan_socket_create(struct net
*net
, bool ipv6
,
2682 __be16 port
, u32 flags
)
2684 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
2685 struct vxlan_sock
*vs
;
2686 struct socket
*sock
;
2688 struct udp_tunnel_sock_cfg tunnel_cfg
;
2690 vs
= kzalloc(sizeof(*vs
), GFP_KERNEL
);
2692 return ERR_PTR(-ENOMEM
);
2694 for (h
= 0; h
< VNI_HASH_SIZE
; ++h
)
2695 INIT_HLIST_HEAD(&vs
->vni_list
[h
]);
2697 sock
= vxlan_create_sock(net
, ipv6
, port
, flags
);
2699 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port
),
2702 return ERR_CAST(sock
);
2706 atomic_set(&vs
->refcnt
, 1);
2707 vs
->flags
= (flags
& VXLAN_F_RCV_FLAGS
);
2709 spin_lock(&vn
->sock_lock
);
2710 hlist_add_head_rcu(&vs
->hlist
, vs_head(net
, port
));
2711 udp_tunnel_notify_add_rx_port(sock
,
2712 (vs
->flags
& VXLAN_F_GPE
) ?
2713 UDP_TUNNEL_TYPE_VXLAN_GPE
:
2714 UDP_TUNNEL_TYPE_VXLAN
);
2715 spin_unlock(&vn
->sock_lock
);
2717 /* Mark socket as an encapsulation socket. */
2718 memset(&tunnel_cfg
, 0, sizeof(tunnel_cfg
));
2719 tunnel_cfg
.sk_user_data
= vs
;
2720 tunnel_cfg
.encap_type
= 1;
2721 tunnel_cfg
.encap_rcv
= vxlan_rcv
;
2722 tunnel_cfg
.encap_destroy
= NULL
;
2723 tunnel_cfg
.gro_receive
= vxlan_gro_receive
;
2724 tunnel_cfg
.gro_complete
= vxlan_gro_complete
;
2726 setup_udp_tunnel_sock(net
, sock
, &tunnel_cfg
);
2731 static int __vxlan_sock_add(struct vxlan_dev
*vxlan
, bool ipv6
)
2733 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
2734 struct vxlan_sock
*vs
= NULL
;
2736 if (!vxlan
->cfg
.no_share
) {
2737 spin_lock(&vn
->sock_lock
);
2738 vs
= vxlan_find_sock(vxlan
->net
, ipv6
? AF_INET6
: AF_INET
,
2739 vxlan
->cfg
.dst_port
, vxlan
->flags
);
2740 if (vs
&& !atomic_add_unless(&vs
->refcnt
, 1, 0)) {
2741 spin_unlock(&vn
->sock_lock
);
2744 spin_unlock(&vn
->sock_lock
);
2747 vs
= vxlan_socket_create(vxlan
->net
, ipv6
,
2748 vxlan
->cfg
.dst_port
, vxlan
->flags
);
2751 #if IS_ENABLED(CONFIG_IPV6)
2753 rcu_assign_pointer(vxlan
->vn6_sock
, vs
);
2756 rcu_assign_pointer(vxlan
->vn4_sock
, vs
);
2757 vxlan_vs_add_dev(vs
, vxlan
);
2761 static int vxlan_sock_add(struct vxlan_dev
*vxlan
)
2763 bool ipv6
= vxlan
->flags
& VXLAN_F_IPV6
;
2764 bool metadata
= vxlan
->flags
& VXLAN_F_COLLECT_METADATA
;
2767 RCU_INIT_POINTER(vxlan
->vn4_sock
, NULL
);
2768 #if IS_ENABLED(CONFIG_IPV6)
2769 RCU_INIT_POINTER(vxlan
->vn6_sock
, NULL
);
2770 if (ipv6
|| metadata
)
2771 ret
= __vxlan_sock_add(vxlan
, true);
2773 if (!ret
&& (!ipv6
|| metadata
))
2774 ret
= __vxlan_sock_add(vxlan
, false);
2776 vxlan_sock_release(vxlan
);
2780 static int vxlan_dev_configure(struct net
*src_net
, struct net_device
*dev
,
2781 struct vxlan_config
*conf
)
2783 struct vxlan_net
*vn
= net_generic(src_net
, vxlan_net_id
);
2784 struct vxlan_dev
*vxlan
= netdev_priv(dev
), *tmp
;
2785 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
2786 unsigned short needed_headroom
= ETH_HLEN
;
2788 bool use_ipv6
= false;
2789 __be16 default_port
= vxlan
->cfg
.dst_port
;
2790 struct net_device
*lowerdev
= NULL
;
2792 if (conf
->flags
& VXLAN_F_GPE
) {
2793 /* For now, allow GPE only together with COLLECT_METADATA.
2794 * This can be relaxed later; in such case, the other side
2795 * of the PtP link will have to be provided.
2797 if ((conf
->flags
& ~VXLAN_F_ALLOWED_GPE
) ||
2798 !(conf
->flags
& VXLAN_F_COLLECT_METADATA
)) {
2799 pr_info("unsupported combination of extensions\n");
2803 vxlan_raw_setup(dev
);
2805 vxlan_ether_setup(dev
);
2808 /* MTU range: 68 - 65535 */
2809 dev
->min_mtu
= ETH_MIN_MTU
;
2810 dev
->max_mtu
= ETH_MAX_MTU
;
2812 vxlan
->net
= src_net
;
2814 dst
->remote_vni
= conf
->vni
;
2816 memcpy(&dst
->remote_ip
, &conf
->remote_ip
, sizeof(conf
->remote_ip
));
2818 /* Unless IPv6 is explicitly requested, assume IPv4 */
2819 if (!dst
->remote_ip
.sa
.sa_family
)
2820 dst
->remote_ip
.sa
.sa_family
= AF_INET
;
2822 if (dst
->remote_ip
.sa
.sa_family
== AF_INET6
||
2823 vxlan
->cfg
.saddr
.sa
.sa_family
== AF_INET6
) {
2824 if (!IS_ENABLED(CONFIG_IPV6
))
2825 return -EPFNOSUPPORT
;
2827 vxlan
->flags
|= VXLAN_F_IPV6
;
2830 if (conf
->label
&& !use_ipv6
) {
2831 pr_info("label only supported in use with IPv6\n");
2835 if (conf
->remote_ifindex
) {
2836 lowerdev
= __dev_get_by_index(src_net
, conf
->remote_ifindex
);
2837 dst
->remote_ifindex
= conf
->remote_ifindex
;
2840 pr_info("ifindex %d does not exist\n", dst
->remote_ifindex
);
2844 #if IS_ENABLED(CONFIG_IPV6)
2846 struct inet6_dev
*idev
= __in6_dev_get(lowerdev
);
2847 if (idev
&& idev
->cnf
.disable_ipv6
) {
2848 pr_info("IPv6 is disabled via sysctl\n");
2855 dev
->mtu
= lowerdev
->mtu
-
2856 (use_ipv6
? VXLAN6_HEADROOM
: VXLAN_HEADROOM
);
2858 needed_headroom
= lowerdev
->hard_header_len
;
2859 } else if (vxlan_addr_multicast(&dst
->remote_ip
)) {
2860 pr_info("multicast destination requires interface to be specified\n");
2865 int max_mtu
= ETH_MAX_MTU
;
2868 max_mtu
= lowerdev
->mtu
;
2870 max_mtu
-= (use_ipv6
? VXLAN6_HEADROOM
: VXLAN_HEADROOM
);
2872 if (conf
->mtu
< dev
->min_mtu
|| conf
->mtu
> dev
->max_mtu
)
2875 dev
->mtu
= conf
->mtu
;
2877 if (conf
->mtu
> max_mtu
)
2881 if (use_ipv6
|| conf
->flags
& VXLAN_F_COLLECT_METADATA
)
2882 needed_headroom
+= VXLAN6_HEADROOM
;
2884 needed_headroom
+= VXLAN_HEADROOM
;
2885 dev
->needed_headroom
= needed_headroom
;
2887 memcpy(&vxlan
->cfg
, conf
, sizeof(*conf
));
2888 if (!vxlan
->cfg
.dst_port
) {
2889 if (conf
->flags
& VXLAN_F_GPE
)
2890 vxlan
->cfg
.dst_port
= 4790; /* IANA assigned VXLAN-GPE port */
2892 vxlan
->cfg
.dst_port
= default_port
;
2894 vxlan
->flags
|= conf
->flags
;
2896 if (!vxlan
->cfg
.age_interval
)
2897 vxlan
->cfg
.age_interval
= FDB_AGE_DEFAULT
;
2899 list_for_each_entry(tmp
, &vn
->vxlan_list
, next
) {
2900 if (tmp
->cfg
.vni
== conf
->vni
&&
2901 (tmp
->default_dst
.remote_ip
.sa
.sa_family
== AF_INET6
||
2902 tmp
->cfg
.saddr
.sa
.sa_family
== AF_INET6
) == use_ipv6
&&
2903 tmp
->cfg
.dst_port
== vxlan
->cfg
.dst_port
&&
2904 (tmp
->flags
& VXLAN_F_RCV_FLAGS
) ==
2905 (vxlan
->flags
& VXLAN_F_RCV_FLAGS
)) {
2906 pr_info("duplicate VNI %u\n", be32_to_cpu(conf
->vni
));
2911 dev
->ethtool_ops
= &vxlan_ethtool_ops
;
2913 /* create an fdb entry for a valid default destination */
2914 if (!vxlan_addr_any(&vxlan
->default_dst
.remote_ip
)) {
2915 err
= vxlan_fdb_create(vxlan
, all_zeros_mac
,
2916 &vxlan
->default_dst
.remote_ip
,
2917 NUD_REACHABLE
|NUD_PERMANENT
,
2918 NLM_F_EXCL
|NLM_F_CREATE
,
2919 vxlan
->cfg
.dst_port
,
2920 vxlan
->default_dst
.remote_vni
,
2921 vxlan
->default_dst
.remote_ifindex
,
2927 err
= register_netdevice(dev
);
2929 vxlan_fdb_delete_default(vxlan
);
2933 list_add(&vxlan
->next
, &vn
->vxlan_list
);
2938 static int vxlan_newlink(struct net
*src_net
, struct net_device
*dev
,
2939 struct nlattr
*tb
[], struct nlattr
*data
[])
2941 struct vxlan_config conf
;
2943 memset(&conf
, 0, sizeof(conf
));
2945 if (data
[IFLA_VXLAN_ID
])
2946 conf
.vni
= cpu_to_be32(nla_get_u32(data
[IFLA_VXLAN_ID
]));
2948 if (data
[IFLA_VXLAN_GROUP
]) {
2949 conf
.remote_ip
.sin
.sin_addr
.s_addr
= nla_get_in_addr(data
[IFLA_VXLAN_GROUP
]);
2950 } else if (data
[IFLA_VXLAN_GROUP6
]) {
2951 if (!IS_ENABLED(CONFIG_IPV6
))
2952 return -EPFNOSUPPORT
;
2954 conf
.remote_ip
.sin6
.sin6_addr
= nla_get_in6_addr(data
[IFLA_VXLAN_GROUP6
]);
2955 conf
.remote_ip
.sa
.sa_family
= AF_INET6
;
2958 if (data
[IFLA_VXLAN_LOCAL
]) {
2959 conf
.saddr
.sin
.sin_addr
.s_addr
= nla_get_in_addr(data
[IFLA_VXLAN_LOCAL
]);
2960 conf
.saddr
.sa
.sa_family
= AF_INET
;
2961 } else if (data
[IFLA_VXLAN_LOCAL6
]) {
2962 if (!IS_ENABLED(CONFIG_IPV6
))
2963 return -EPFNOSUPPORT
;
2965 /* TODO: respect scope id */
2966 conf
.saddr
.sin6
.sin6_addr
= nla_get_in6_addr(data
[IFLA_VXLAN_LOCAL6
]);
2967 conf
.saddr
.sa
.sa_family
= AF_INET6
;
2970 if (data
[IFLA_VXLAN_LINK
])
2971 conf
.remote_ifindex
= nla_get_u32(data
[IFLA_VXLAN_LINK
]);
2973 if (data
[IFLA_VXLAN_TOS
])
2974 conf
.tos
= nla_get_u8(data
[IFLA_VXLAN_TOS
]);
2976 if (data
[IFLA_VXLAN_TTL
])
2977 conf
.ttl
= nla_get_u8(data
[IFLA_VXLAN_TTL
]);
2979 if (data
[IFLA_VXLAN_LABEL
])
2980 conf
.label
= nla_get_be32(data
[IFLA_VXLAN_LABEL
]) &
2981 IPV6_FLOWLABEL_MASK
;
2983 if (!data
[IFLA_VXLAN_LEARNING
] || nla_get_u8(data
[IFLA_VXLAN_LEARNING
]))
2984 conf
.flags
|= VXLAN_F_LEARN
;
2986 if (data
[IFLA_VXLAN_AGEING
])
2987 conf
.age_interval
= nla_get_u32(data
[IFLA_VXLAN_AGEING
]);
2989 if (data
[IFLA_VXLAN_PROXY
] && nla_get_u8(data
[IFLA_VXLAN_PROXY
]))
2990 conf
.flags
|= VXLAN_F_PROXY
;
2992 if (data
[IFLA_VXLAN_RSC
] && nla_get_u8(data
[IFLA_VXLAN_RSC
]))
2993 conf
.flags
|= VXLAN_F_RSC
;
2995 if (data
[IFLA_VXLAN_L2MISS
] && nla_get_u8(data
[IFLA_VXLAN_L2MISS
]))
2996 conf
.flags
|= VXLAN_F_L2MISS
;
2998 if (data
[IFLA_VXLAN_L3MISS
] && nla_get_u8(data
[IFLA_VXLAN_L3MISS
]))
2999 conf
.flags
|= VXLAN_F_L3MISS
;
3001 if (data
[IFLA_VXLAN_LIMIT
])
3002 conf
.addrmax
= nla_get_u32(data
[IFLA_VXLAN_LIMIT
]);
3004 if (data
[IFLA_VXLAN_COLLECT_METADATA
] &&
3005 nla_get_u8(data
[IFLA_VXLAN_COLLECT_METADATA
]))
3006 conf
.flags
|= VXLAN_F_COLLECT_METADATA
;
3008 if (data
[IFLA_VXLAN_PORT_RANGE
]) {
3009 const struct ifla_vxlan_port_range
*p
3010 = nla_data(data
[IFLA_VXLAN_PORT_RANGE
]);
3011 conf
.port_min
= ntohs(p
->low
);
3012 conf
.port_max
= ntohs(p
->high
);
3015 if (data
[IFLA_VXLAN_PORT
])
3016 conf
.dst_port
= nla_get_be16(data
[IFLA_VXLAN_PORT
]);
3018 if (data
[IFLA_VXLAN_UDP_CSUM
] &&
3019 !nla_get_u8(data
[IFLA_VXLAN_UDP_CSUM
]))
3020 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM_TX
;
3022 if (data
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
] &&
3023 nla_get_u8(data
[IFLA_VXLAN_UDP_ZERO_CSUM6_TX
]))
3024 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM6_TX
;
3026 if (data
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
] &&
3027 nla_get_u8(data
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX
]))
3028 conf
.flags
|= VXLAN_F_UDP_ZERO_CSUM6_RX
;
3030 if (data
[IFLA_VXLAN_REMCSUM_TX
] &&
3031 nla_get_u8(data
[IFLA_VXLAN_REMCSUM_TX
]))
3032 conf
.flags
|= VXLAN_F_REMCSUM_TX
;
3034 if (data
[IFLA_VXLAN_REMCSUM_RX
] &&
3035 nla_get_u8(data
[IFLA_VXLAN_REMCSUM_RX
]))
3036 conf
.flags
|= VXLAN_F_REMCSUM_RX
;
3038 if (data
[IFLA_VXLAN_GBP
])
3039 conf
.flags
|= VXLAN_F_GBP
;
3041 if (data
[IFLA_VXLAN_GPE
])
3042 conf
.flags
|= VXLAN_F_GPE
;
3044 if (data
[IFLA_VXLAN_REMCSUM_NOPARTIAL
])
3045 conf
.flags
|= VXLAN_F_REMCSUM_NOPARTIAL
;
3048 conf
.mtu
= nla_get_u32(tb
[IFLA_MTU
]);
3050 return vxlan_dev_configure(src_net
, dev
, &conf
);
3053 static void vxlan_dellink(struct net_device
*dev
, struct list_head
*head
)
3055 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3056 struct vxlan_net
*vn
= net_generic(vxlan
->net
, vxlan_net_id
);
3058 spin_lock(&vn
->sock_lock
);
3059 if (!hlist_unhashed(&vxlan
->hlist
))
3060 hlist_del_rcu(&vxlan
->hlist
);
3061 spin_unlock(&vn
->sock_lock
);
3063 gro_cells_destroy(&vxlan
->gro_cells
);
3064 list_del(&vxlan
->next
);
3065 unregister_netdevice_queue(dev
, head
);
3068 static size_t vxlan_get_size(const struct net_device
*dev
)
3071 return nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_ID */
3072 nla_total_size(sizeof(struct in6_addr
)) + /* IFLA_VXLAN_GROUP{6} */
3073 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_LINK */
3074 nla_total_size(sizeof(struct in6_addr
)) + /* IFLA_VXLAN_LOCAL{6} */
3075 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_TTL */
3076 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_TOS */
3077 nla_total_size(sizeof(__be32
)) + /* IFLA_VXLAN_LABEL */
3078 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_LEARNING */
3079 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_PROXY */
3080 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_RSC */
3081 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_L2MISS */
3082 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_L3MISS */
3083 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_COLLECT_METADATA */
3084 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_AGEING */
3085 nla_total_size(sizeof(__u32
)) + /* IFLA_VXLAN_LIMIT */
3086 nla_total_size(sizeof(struct ifla_vxlan_port_range
)) +
3087 nla_total_size(sizeof(__be16
)) + /* IFLA_VXLAN_PORT */
3088 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_CSUM */
3089 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3090 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
3091 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_REMCSUM_TX */
3092 nla_total_size(sizeof(__u8
)) + /* IFLA_VXLAN_REMCSUM_RX */
3096 static int vxlan_fill_info(struct sk_buff
*skb
, const struct net_device
*dev
)
3098 const struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3099 const struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
3100 struct ifla_vxlan_port_range ports
= {
3101 .low
= htons(vxlan
->cfg
.port_min
),
3102 .high
= htons(vxlan
->cfg
.port_max
),
3105 if (nla_put_u32(skb
, IFLA_VXLAN_ID
, be32_to_cpu(dst
->remote_vni
)))
3106 goto nla_put_failure
;
3108 if (!vxlan_addr_any(&dst
->remote_ip
)) {
3109 if (dst
->remote_ip
.sa
.sa_family
== AF_INET
) {
3110 if (nla_put_in_addr(skb
, IFLA_VXLAN_GROUP
,
3111 dst
->remote_ip
.sin
.sin_addr
.s_addr
))
3112 goto nla_put_failure
;
3113 #if IS_ENABLED(CONFIG_IPV6)
3115 if (nla_put_in6_addr(skb
, IFLA_VXLAN_GROUP6
,
3116 &dst
->remote_ip
.sin6
.sin6_addr
))
3117 goto nla_put_failure
;
3122 if (dst
->remote_ifindex
&& nla_put_u32(skb
, IFLA_VXLAN_LINK
, dst
->remote_ifindex
))
3123 goto nla_put_failure
;
3125 if (!vxlan_addr_any(&vxlan
->cfg
.saddr
)) {
3126 if (vxlan
->cfg
.saddr
.sa
.sa_family
== AF_INET
) {
3127 if (nla_put_in_addr(skb
, IFLA_VXLAN_LOCAL
,
3128 vxlan
->cfg
.saddr
.sin
.sin_addr
.s_addr
))
3129 goto nla_put_failure
;
3130 #if IS_ENABLED(CONFIG_IPV6)
3132 if (nla_put_in6_addr(skb
, IFLA_VXLAN_LOCAL6
,
3133 &vxlan
->cfg
.saddr
.sin6
.sin6_addr
))
3134 goto nla_put_failure
;
3139 if (nla_put_u8(skb
, IFLA_VXLAN_TTL
, vxlan
->cfg
.ttl
) ||
3140 nla_put_u8(skb
, IFLA_VXLAN_TOS
, vxlan
->cfg
.tos
) ||
3141 nla_put_be32(skb
, IFLA_VXLAN_LABEL
, vxlan
->cfg
.label
) ||
3142 nla_put_u8(skb
, IFLA_VXLAN_LEARNING
,
3143 !!(vxlan
->flags
& VXLAN_F_LEARN
)) ||
3144 nla_put_u8(skb
, IFLA_VXLAN_PROXY
,
3145 !!(vxlan
->flags
& VXLAN_F_PROXY
)) ||
3146 nla_put_u8(skb
, IFLA_VXLAN_RSC
, !!(vxlan
->flags
& VXLAN_F_RSC
)) ||
3147 nla_put_u8(skb
, IFLA_VXLAN_L2MISS
,
3148 !!(vxlan
->flags
& VXLAN_F_L2MISS
)) ||
3149 nla_put_u8(skb
, IFLA_VXLAN_L3MISS
,
3150 !!(vxlan
->flags
& VXLAN_F_L3MISS
)) ||
3151 nla_put_u8(skb
, IFLA_VXLAN_COLLECT_METADATA
,
3152 !!(vxlan
->flags
& VXLAN_F_COLLECT_METADATA
)) ||
3153 nla_put_u32(skb
, IFLA_VXLAN_AGEING
, vxlan
->cfg
.age_interval
) ||
3154 nla_put_u32(skb
, IFLA_VXLAN_LIMIT
, vxlan
->cfg
.addrmax
) ||
3155 nla_put_be16(skb
, IFLA_VXLAN_PORT
, vxlan
->cfg
.dst_port
) ||
3156 nla_put_u8(skb
, IFLA_VXLAN_UDP_CSUM
,
3157 !(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM_TX
)) ||
3158 nla_put_u8(skb
, IFLA_VXLAN_UDP_ZERO_CSUM6_TX
,
3159 !!(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM6_TX
)) ||
3160 nla_put_u8(skb
, IFLA_VXLAN_UDP_ZERO_CSUM6_RX
,
3161 !!(vxlan
->flags
& VXLAN_F_UDP_ZERO_CSUM6_RX
)) ||
3162 nla_put_u8(skb
, IFLA_VXLAN_REMCSUM_TX
,
3163 !!(vxlan
->flags
& VXLAN_F_REMCSUM_TX
)) ||
3164 nla_put_u8(skb
, IFLA_VXLAN_REMCSUM_RX
,
3165 !!(vxlan
->flags
& VXLAN_F_REMCSUM_RX
)))
3166 goto nla_put_failure
;
3168 if (nla_put(skb
, IFLA_VXLAN_PORT_RANGE
, sizeof(ports
), &ports
))
3169 goto nla_put_failure
;
3171 if (vxlan
->flags
& VXLAN_F_GBP
&&
3172 nla_put_flag(skb
, IFLA_VXLAN_GBP
))
3173 goto nla_put_failure
;
3175 if (vxlan
->flags
& VXLAN_F_GPE
&&
3176 nla_put_flag(skb
, IFLA_VXLAN_GPE
))
3177 goto nla_put_failure
;
3179 if (vxlan
->flags
& VXLAN_F_REMCSUM_NOPARTIAL
&&
3180 nla_put_flag(skb
, IFLA_VXLAN_REMCSUM_NOPARTIAL
))
3181 goto nla_put_failure
;
3189 static struct net
*vxlan_get_link_net(const struct net_device
*dev
)
3191 struct vxlan_dev
*vxlan
= netdev_priv(dev
);
3196 static struct rtnl_link_ops vxlan_link_ops __read_mostly
= {
3198 .maxtype
= IFLA_VXLAN_MAX
,
3199 .policy
= vxlan_policy
,
3200 .priv_size
= sizeof(struct vxlan_dev
),
3201 .setup
= vxlan_setup
,
3202 .validate
= vxlan_validate
,
3203 .newlink
= vxlan_newlink
,
3204 .dellink
= vxlan_dellink
,
3205 .get_size
= vxlan_get_size
,
3206 .fill_info
= vxlan_fill_info
,
3207 .get_link_net
= vxlan_get_link_net
,
3210 struct net_device
*vxlan_dev_create(struct net
*net
, const char *name
,
3211 u8 name_assign_type
,
3212 struct vxlan_config
*conf
)
3214 struct nlattr
*tb
[IFLA_MAX
+ 1];
3215 struct net_device
*dev
;
3218 memset(&tb
, 0, sizeof(tb
));
3220 dev
= rtnl_create_link(net
, name
, name_assign_type
,
3221 &vxlan_link_ops
, tb
);
3225 err
= vxlan_dev_configure(net
, dev
, conf
);
3228 return ERR_PTR(err
);
3231 err
= rtnl_configure_link(dev
, NULL
);
3233 LIST_HEAD(list_kill
);
3235 vxlan_dellink(dev
, &list_kill
);
3236 unregister_netdevice_many(&list_kill
);
3237 return ERR_PTR(err
);
3242 EXPORT_SYMBOL_GPL(vxlan_dev_create
);
3244 static void vxlan_handle_lowerdev_unregister(struct vxlan_net
*vn
,
3245 struct net_device
*dev
)
3247 struct vxlan_dev
*vxlan
, *next
;
3248 LIST_HEAD(list_kill
);
3250 list_for_each_entry_safe(vxlan
, next
, &vn
->vxlan_list
, next
) {
3251 struct vxlan_rdst
*dst
= &vxlan
->default_dst
;
3253 /* In case we created vxlan device with carrier
3254 * and we loose the carrier due to module unload
3255 * we also need to remove vxlan device. In other
3256 * cases, it's not necessary and remote_ifindex
3257 * is 0 here, so no matches.
3259 if (dst
->remote_ifindex
== dev
->ifindex
)
3260 vxlan_dellink(vxlan
->dev
, &list_kill
);
3263 unregister_netdevice_many(&list_kill
);
3266 static int vxlan_netdevice_event(struct notifier_block
*unused
,
3267 unsigned long event
, void *ptr
)
3269 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3270 struct vxlan_net
*vn
= net_generic(dev_net(dev
), vxlan_net_id
);
3272 if (event
== NETDEV_UNREGISTER
)
3273 vxlan_handle_lowerdev_unregister(vn
, dev
);
3274 else if (event
== NETDEV_UDP_TUNNEL_PUSH_INFO
)
3275 vxlan_push_rx_ports(dev
);
3280 static struct notifier_block vxlan_notifier_block __read_mostly
= {
3281 .notifier_call
= vxlan_netdevice_event
,
3284 static __net_init
int vxlan_init_net(struct net
*net
)
3286 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
3289 INIT_LIST_HEAD(&vn
->vxlan_list
);
3290 spin_lock_init(&vn
->sock_lock
);
3292 for (h
= 0; h
< PORT_HASH_SIZE
; ++h
)
3293 INIT_HLIST_HEAD(&vn
->sock_list
[h
]);
3298 static void __net_exit
vxlan_exit_net(struct net
*net
)
3300 struct vxlan_net
*vn
= net_generic(net
, vxlan_net_id
);
3301 struct vxlan_dev
*vxlan
, *next
;
3302 struct net_device
*dev
, *aux
;
3306 for_each_netdev_safe(net
, dev
, aux
)
3307 if (dev
->rtnl_link_ops
== &vxlan_link_ops
)
3308 unregister_netdevice_queue(dev
, &list
);
3310 list_for_each_entry_safe(vxlan
, next
, &vn
->vxlan_list
, next
) {
3311 /* If vxlan->dev is in the same netns, it has already been added
3312 * to the list by the previous loop.
3314 if (!net_eq(dev_net(vxlan
->dev
), net
)) {
3315 gro_cells_destroy(&vxlan
->gro_cells
);
3316 unregister_netdevice_queue(vxlan
->dev
, &list
);
3320 unregister_netdevice_many(&list
);
3324 static struct pernet_operations vxlan_net_ops
= {
3325 .init
= vxlan_init_net
,
3326 .exit
= vxlan_exit_net
,
3327 .id
= &vxlan_net_id
,
3328 .size
= sizeof(struct vxlan_net
),
3331 static int __init
vxlan_init_module(void)
3335 get_random_bytes(&vxlan_salt
, sizeof(vxlan_salt
));
3337 rc
= register_pernet_subsys(&vxlan_net_ops
);
3341 rc
= register_netdevice_notifier(&vxlan_notifier_block
);
3345 rc
= rtnl_link_register(&vxlan_link_ops
);
3351 unregister_netdevice_notifier(&vxlan_notifier_block
);
3353 unregister_pernet_subsys(&vxlan_net_ops
);
3357 late_initcall(vxlan_init_module
);
3359 static void __exit
vxlan_cleanup_module(void)
3361 rtnl_link_unregister(&vxlan_link_ops
);
3362 unregister_netdevice_notifier(&vxlan_notifier_block
);
3363 unregister_pernet_subsys(&vxlan_net_ops
);
3364 /* rcu_barrier() is called by netns */
3366 module_exit(vxlan_cleanup_module
);
3368 MODULE_LICENSE("GPL");
3369 MODULE_VERSION(VXLAN_VERSION
);
3370 MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
3371 MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
3372 MODULE_ALIAS_RTNL_LINK("vxlan");