2 * GENEVE: Generic Network Virtualization Encapsulation
4 * Copyright (c) 2015 Red Hat, 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/netdevice.h>
16 #include <linux/etherdevice.h>
17 #include <linux/hash.h>
18 #include <net/dst_metadata.h>
19 #include <net/gro_cells.h>
20 #include <net/rtnetlink.h>
21 #include <net/geneve.h>
22 #include <net/protocol.h>
24 #define GENEVE_NETDEV_VER "0.6"
26 #define GENEVE_UDP_PORT 6081
28 #define GENEVE_N_VID (1u << 24)
29 #define GENEVE_VID_MASK (GENEVE_N_VID - 1)
31 #define VNI_HASH_BITS 10
32 #define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
34 static bool log_ecn_error
= true;
35 module_param(log_ecn_error
, bool, 0644);
36 MODULE_PARM_DESC(log_ecn_error
, "Log packets received with corrupted ECN");
39 #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr))
41 /* per-network namespace private data for this module */
43 struct list_head geneve_list
;
44 struct list_head sock_list
;
47 static int geneve_net_id
;
50 struct sockaddr_in sin
;
51 struct sockaddr_in6 sin6
;
55 static union geneve_addr geneve_remote_unspec
= { .sa
.sa_family
= AF_UNSPEC
, };
57 /* Pseudo network device */
59 struct hlist_node hlist
; /* vni hash table */
60 struct net
*net
; /* netns for packet i/o */
61 struct net_device
*dev
; /* netdev for geneve tunnel */
62 struct geneve_sock
*sock4
; /* IPv4 socket used for geneve tunnel */
63 #if IS_ENABLED(CONFIG_IPV6)
64 struct geneve_sock
*sock6
; /* IPv6 socket used for geneve tunnel */
66 u8 vni
[3]; /* virtual network ID for tunnel */
67 u8 ttl
; /* TTL override */
68 u8 tos
; /* TOS override */
69 union geneve_addr remote
; /* IP address for link partner */
70 struct list_head next
; /* geneve's per namespace list */
73 struct gro_cells gro_cells
;
75 struct dst_cache dst_cache
;
78 /* Geneve device flags */
79 #define GENEVE_F_UDP_ZERO_CSUM_TX BIT(0)
80 #define GENEVE_F_UDP_ZERO_CSUM6_TX BIT(1)
81 #define GENEVE_F_UDP_ZERO_CSUM6_RX BIT(2)
85 struct list_head list
;
89 struct udp_offload udp_offloads
;
90 struct hlist_head vni_list
[VNI_HASH_SIZE
];
94 static inline __u32
geneve_net_vni_hash(u8 vni
[3])
98 vnid
= (vni
[0] << 16) | (vni
[1] << 8) | vni
[2];
99 return hash_32(vnid
, VNI_HASH_BITS
);
102 static __be64
vni_to_tunnel_id(const __u8
*vni
)
105 return (vni
[0] << 16) | (vni
[1] << 8) | vni
[2];
107 return (__force __be64
)(((__force u64
)vni
[0] << 40) |
108 ((__force u64
)vni
[1] << 48) |
109 ((__force u64
)vni
[2] << 56));
113 static sa_family_t
geneve_get_sk_family(struct geneve_sock
*gs
)
115 return gs
->sock
->sk
->sk_family
;
118 static struct geneve_dev
*geneve_lookup(struct geneve_sock
*gs
,
119 __be32 addr
, u8 vni
[])
121 struct hlist_head
*vni_list_head
;
122 struct geneve_dev
*geneve
;
125 /* Find the device for this VNI */
126 hash
= geneve_net_vni_hash(vni
);
127 vni_list_head
= &gs
->vni_list
[hash
];
128 hlist_for_each_entry_rcu(geneve
, vni_list_head
, hlist
) {
129 if (!memcmp(vni
, geneve
->vni
, sizeof(geneve
->vni
)) &&
130 addr
== geneve
->remote
.sin
.sin_addr
.s_addr
)
136 #if IS_ENABLED(CONFIG_IPV6)
137 static struct geneve_dev
*geneve6_lookup(struct geneve_sock
*gs
,
138 struct in6_addr addr6
, u8 vni
[])
140 struct hlist_head
*vni_list_head
;
141 struct geneve_dev
*geneve
;
144 /* Find the device for this VNI */
145 hash
= geneve_net_vni_hash(vni
);
146 vni_list_head
= &gs
->vni_list
[hash
];
147 hlist_for_each_entry_rcu(geneve
, vni_list_head
, hlist
) {
148 if (!memcmp(vni
, geneve
->vni
, sizeof(geneve
->vni
)) &&
149 ipv6_addr_equal(&addr6
, &geneve
->remote
.sin6
.sin6_addr
))
156 static inline struct genevehdr
*geneve_hdr(const struct sk_buff
*skb
)
158 return (struct genevehdr
*)(udp_hdr(skb
) + 1);
161 static struct geneve_dev
*geneve_lookup_skb(struct geneve_sock
*gs
,
166 static u8 zero_vni
[3];
167 #if IS_ENABLED(CONFIG_IPV6)
168 static struct in6_addr zero_addr6
;
171 if (geneve_get_sk_family(gs
) == AF_INET
) {
174 iph
= ip_hdr(skb
); /* outer IP header... */
176 if (gs
->collect_md
) {
180 vni
= geneve_hdr(skb
)->vni
;
184 return geneve_lookup(gs
, addr
, vni
);
185 #if IS_ENABLED(CONFIG_IPV6)
186 } else if (geneve_get_sk_family(gs
) == AF_INET6
) {
187 struct ipv6hdr
*ip6h
;
188 struct in6_addr addr6
;
190 ip6h
= ipv6_hdr(skb
); /* outer IPv6 header... */
192 if (gs
->collect_md
) {
196 vni
= geneve_hdr(skb
)->vni
;
200 return geneve6_lookup(gs
, addr6
, vni
);
206 /* geneve receive/decap routine */
207 static void geneve_rx(struct geneve_dev
*geneve
, struct geneve_sock
*gs
,
210 struct genevehdr
*gnvh
= geneve_hdr(skb
);
211 struct metadata_dst
*tun_dst
= NULL
;
212 struct pcpu_sw_netstats
*stats
;
216 if (ip_tunnel_collect_metadata() || gs
->collect_md
) {
219 flags
= TUNNEL_KEY
| TUNNEL_GENEVE_OPT
|
220 (gnvh
->oam
? TUNNEL_OAM
: 0) |
221 (gnvh
->critical
? TUNNEL_CRIT_OPT
: 0);
223 tun_dst
= udp_tun_rx_dst(skb
, geneve_get_sk_family(gs
), flags
,
224 vni_to_tunnel_id(gnvh
->vni
),
228 /* Update tunnel dst according to Geneve options. */
229 ip_tunnel_info_opts_set(&tun_dst
->u
.tun_info
,
230 gnvh
->options
, gnvh
->opt_len
* 4);
232 /* Drop packets w/ critical options,
233 * since we don't support any...
239 skb_reset_mac_header(skb
);
240 skb
->protocol
= eth_type_trans(skb
, geneve
->dev
);
241 skb_postpull_rcsum(skb
, eth_hdr(skb
), ETH_HLEN
);
244 skb_dst_set(skb
, &tun_dst
->dst
);
246 /* Ignore packet loops (and multicast echo) */
247 if (ether_addr_equal(eth_hdr(skb
)->h_source
, geneve
->dev
->dev_addr
))
250 oiph
= skb_network_header(skb
);
251 skb_reset_network_header(skb
);
253 if (geneve_get_sk_family(gs
) == AF_INET
)
254 err
= IP_ECN_decapsulate(oiph
, skb
);
255 #if IS_ENABLED(CONFIG_IPV6)
257 err
= IP6_ECN_decapsulate(oiph
, skb
);
262 if (geneve_get_sk_family(gs
) == AF_INET
)
263 net_info_ratelimited("non-ECT from %pI4 "
265 &((struct iphdr
*)oiph
)->saddr
,
266 ((struct iphdr
*)oiph
)->tos
);
267 #if IS_ENABLED(CONFIG_IPV6)
269 net_info_ratelimited("non-ECT from %pI6\n",
270 &((struct ipv6hdr
*)oiph
)->saddr
);
274 ++geneve
->dev
->stats
.rx_frame_errors
;
275 ++geneve
->dev
->stats
.rx_errors
;
280 stats
= this_cpu_ptr(geneve
->dev
->tstats
);
281 u64_stats_update_begin(&stats
->syncp
);
283 stats
->rx_bytes
+= skb
->len
;
284 u64_stats_update_end(&stats
->syncp
);
286 gro_cells_receive(&geneve
->gro_cells
, skb
);
289 /* Consume bad packet */
293 /* Setup stats when device is created */
294 static int geneve_init(struct net_device
*dev
)
296 struct geneve_dev
*geneve
= netdev_priv(dev
);
299 dev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
303 err
= gro_cells_init(&geneve
->gro_cells
, dev
);
305 free_percpu(dev
->tstats
);
309 err
= dst_cache_init(&geneve
->dst_cache
, GFP_KERNEL
);
311 free_percpu(dev
->tstats
);
312 gro_cells_destroy(&geneve
->gro_cells
);
319 static void geneve_uninit(struct net_device
*dev
)
321 struct geneve_dev
*geneve
= netdev_priv(dev
);
323 dst_cache_destroy(&geneve
->dst_cache
);
324 gro_cells_destroy(&geneve
->gro_cells
);
325 free_percpu(dev
->tstats
);
328 /* Callback from net/ipv4/udp.c to receive packets */
329 static int geneve_udp_encap_recv(struct sock
*sk
, struct sk_buff
*skb
)
331 struct genevehdr
*geneveh
;
332 struct geneve_dev
*geneve
;
333 struct geneve_sock
*gs
;
336 /* Need Geneve and inner Ethernet header to be present */
337 if (unlikely(!pskb_may_pull(skb
, GENEVE_BASE_HLEN
)))
340 /* Return packets with reserved bits set */
341 geneveh
= geneve_hdr(skb
);
342 if (unlikely(geneveh
->ver
!= GENEVE_VER
))
345 if (unlikely(geneveh
->proto_type
!= htons(ETH_P_TEB
)))
348 gs
= rcu_dereference_sk_user_data(sk
);
352 geneve
= geneve_lookup_skb(gs
, skb
);
356 opts_len
= geneveh
->opt_len
* 4;
357 if (iptunnel_pull_header(skb
, GENEVE_BASE_HLEN
+ opts_len
,
359 !net_eq(geneve
->net
, dev_net(geneve
->dev
))))
362 geneve_rx(geneve
, gs
, skb
);
366 /* Consume bad packet */
371 /* Let the UDP layer deal with the skb */
375 static struct socket
*geneve_create_sock(struct net
*net
, bool ipv6
,
376 __be16 port
, u32 flags
)
379 struct udp_port_cfg udp_conf
;
382 memset(&udp_conf
, 0, sizeof(udp_conf
));
385 udp_conf
.family
= AF_INET6
;
386 udp_conf
.ipv6_v6only
= 1;
387 udp_conf
.use_udp6_rx_checksums
=
388 !(flags
& GENEVE_F_UDP_ZERO_CSUM6_RX
);
390 udp_conf
.family
= AF_INET
;
391 udp_conf
.local_ip
.s_addr
= htonl(INADDR_ANY
);
394 udp_conf
.local_udp_port
= port
;
396 /* Open UDP socket */
397 err
= udp_sock_create(net
, &udp_conf
, &sock
);
404 static void geneve_notify_add_rx_port(struct geneve_sock
*gs
)
406 struct net_device
*dev
;
407 struct sock
*sk
= gs
->sock
->sk
;
408 struct net
*net
= sock_net(sk
);
409 sa_family_t sa_family
= geneve_get_sk_family(gs
);
410 __be16 port
= inet_sk(sk
)->inet_sport
;
413 if (sa_family
== AF_INET
) {
414 err
= udp_add_offload(sock_net(sk
), &gs
->udp_offloads
);
416 pr_warn("geneve: udp_add_offload failed with status %d\n",
421 for_each_netdev_rcu(net
, dev
) {
422 if (dev
->netdev_ops
->ndo_add_geneve_port
)
423 dev
->netdev_ops
->ndo_add_geneve_port(dev
, sa_family
,
429 static int geneve_hlen(struct genevehdr
*gh
)
431 return sizeof(*gh
) + gh
->opt_len
* 4;
434 static struct sk_buff
**geneve_gro_receive(struct sk_buff
**head
,
436 struct udp_offload
*uoff
)
438 struct sk_buff
*p
, **pp
= NULL
;
439 struct genevehdr
*gh
, *gh2
;
440 unsigned int hlen
, gh_len
, off_gnv
;
441 const struct packet_offload
*ptype
;
445 off_gnv
= skb_gro_offset(skb
);
446 hlen
= off_gnv
+ sizeof(*gh
);
447 gh
= skb_gro_header_fast(skb
, off_gnv
);
448 if (skb_gro_header_hard(skb
, hlen
)) {
449 gh
= skb_gro_header_slow(skb
, hlen
, off_gnv
);
454 if (gh
->ver
!= GENEVE_VER
|| gh
->oam
)
456 gh_len
= geneve_hlen(gh
);
458 hlen
= off_gnv
+ gh_len
;
459 if (skb_gro_header_hard(skb
, hlen
)) {
460 gh
= skb_gro_header_slow(skb
, hlen
, off_gnv
);
467 for (p
= *head
; p
; p
= p
->next
) {
468 if (!NAPI_GRO_CB(p
)->same_flow
)
471 gh2
= (struct genevehdr
*)(p
->data
+ off_gnv
);
472 if (gh
->opt_len
!= gh2
->opt_len
||
473 memcmp(gh
, gh2
, gh_len
)) {
474 NAPI_GRO_CB(p
)->same_flow
= 0;
479 type
= gh
->proto_type
;
482 ptype
= gro_find_receive_by_type(type
);
488 skb_gro_pull(skb
, gh_len
);
489 skb_gro_postpull_rcsum(skb
, gh
, gh_len
);
490 pp
= ptype
->callbacks
.gro_receive(head
, skb
);
495 NAPI_GRO_CB(skb
)->flush
|= flush
;
500 static int geneve_gro_complete(struct sk_buff
*skb
, int nhoff
,
501 struct udp_offload
*uoff
)
503 struct genevehdr
*gh
;
504 struct packet_offload
*ptype
;
509 udp_tunnel_gro_complete(skb
, nhoff
);
511 gh
= (struct genevehdr
*)(skb
->data
+ nhoff
);
512 gh_len
= geneve_hlen(gh
);
513 type
= gh
->proto_type
;
516 ptype
= gro_find_complete_by_type(type
);
518 err
= ptype
->callbacks
.gro_complete(skb
, nhoff
+ gh_len
);
524 /* Create new listen socket if needed */
525 static struct geneve_sock
*geneve_socket_create(struct net
*net
, __be16 port
,
526 bool ipv6
, u32 flags
)
528 struct geneve_net
*gn
= net_generic(net
, geneve_net_id
);
529 struct geneve_sock
*gs
;
531 struct udp_tunnel_sock_cfg tunnel_cfg
;
534 gs
= kzalloc(sizeof(*gs
), GFP_KERNEL
);
536 return ERR_PTR(-ENOMEM
);
538 sock
= geneve_create_sock(net
, ipv6
, port
, flags
);
541 return ERR_CAST(sock
);
546 for (h
= 0; h
< VNI_HASH_SIZE
; ++h
)
547 INIT_HLIST_HEAD(&gs
->vni_list
[h
]);
549 /* Initialize the geneve udp offloads structure */
550 gs
->udp_offloads
.port
= port
;
551 gs
->udp_offloads
.callbacks
.gro_receive
= geneve_gro_receive
;
552 gs
->udp_offloads
.callbacks
.gro_complete
= geneve_gro_complete
;
553 geneve_notify_add_rx_port(gs
);
555 /* Mark socket as an encapsulation socket */
556 tunnel_cfg
.sk_user_data
= gs
;
557 tunnel_cfg
.encap_type
= 1;
558 tunnel_cfg
.encap_rcv
= geneve_udp_encap_recv
;
559 tunnel_cfg
.encap_destroy
= NULL
;
560 setup_udp_tunnel_sock(net
, sock
, &tunnel_cfg
);
561 list_add(&gs
->list
, &gn
->sock_list
);
565 static void geneve_notify_del_rx_port(struct geneve_sock
*gs
)
567 struct net_device
*dev
;
568 struct sock
*sk
= gs
->sock
->sk
;
569 struct net
*net
= sock_net(sk
);
570 sa_family_t sa_family
= geneve_get_sk_family(gs
);
571 __be16 port
= inet_sk(sk
)->inet_sport
;
574 for_each_netdev_rcu(net
, dev
) {
575 if (dev
->netdev_ops
->ndo_del_geneve_port
)
576 dev
->netdev_ops
->ndo_del_geneve_port(dev
, sa_family
,
582 if (sa_family
== AF_INET
)
583 udp_del_offload(&gs
->udp_offloads
);
586 static void __geneve_sock_release(struct geneve_sock
*gs
)
588 if (!gs
|| --gs
->refcnt
)
592 geneve_notify_del_rx_port(gs
);
593 udp_tunnel_sock_release(gs
->sock
);
597 static void geneve_sock_release(struct geneve_dev
*geneve
)
599 __geneve_sock_release(geneve
->sock4
);
600 #if IS_ENABLED(CONFIG_IPV6)
601 __geneve_sock_release(geneve
->sock6
);
605 static struct geneve_sock
*geneve_find_sock(struct geneve_net
*gn
,
609 struct geneve_sock
*gs
;
611 list_for_each_entry(gs
, &gn
->sock_list
, list
) {
612 if (inet_sk(gs
->sock
->sk
)->inet_sport
== dst_port
&&
613 geneve_get_sk_family(gs
) == family
) {
620 static int geneve_sock_add(struct geneve_dev
*geneve
, bool ipv6
)
622 struct net
*net
= geneve
->net
;
623 struct geneve_net
*gn
= net_generic(net
, geneve_net_id
);
624 struct geneve_sock
*gs
;
627 gs
= geneve_find_sock(gn
, ipv6
? AF_INET6
: AF_INET
, geneve
->dst_port
);
633 gs
= geneve_socket_create(net
, geneve
->dst_port
, ipv6
, geneve
->flags
);
638 gs
->collect_md
= geneve
->collect_md
;
639 gs
->flags
= geneve
->flags
;
640 #if IS_ENABLED(CONFIG_IPV6)
647 hash
= geneve_net_vni_hash(geneve
->vni
);
648 hlist_add_head_rcu(&geneve
->hlist
, &gs
->vni_list
[hash
]);
652 static int geneve_open(struct net_device
*dev
)
654 struct geneve_dev
*geneve
= netdev_priv(dev
);
655 bool ipv6
= geneve
->remote
.sa
.sa_family
== AF_INET6
;
656 bool metadata
= geneve
->collect_md
;
659 geneve
->sock4
= NULL
;
660 #if IS_ENABLED(CONFIG_IPV6)
661 geneve
->sock6
= NULL
;
662 if (ipv6
|| metadata
)
663 ret
= geneve_sock_add(geneve
, true);
665 if (!ret
&& (!ipv6
|| metadata
))
666 ret
= geneve_sock_add(geneve
, false);
668 geneve_sock_release(geneve
);
673 static int geneve_stop(struct net_device
*dev
)
675 struct geneve_dev
*geneve
= netdev_priv(dev
);
677 if (!hlist_unhashed(&geneve
->hlist
))
678 hlist_del_rcu(&geneve
->hlist
);
679 geneve_sock_release(geneve
);
683 static void geneve_build_header(struct genevehdr
*geneveh
,
684 __be16 tun_flags
, u8 vni
[3],
685 u8 options_len
, u8
*options
)
687 geneveh
->ver
= GENEVE_VER
;
688 geneveh
->opt_len
= options_len
/ 4;
689 geneveh
->oam
= !!(tun_flags
& TUNNEL_OAM
);
690 geneveh
->critical
= !!(tun_flags
& TUNNEL_CRIT_OPT
);
692 memcpy(geneveh
->vni
, vni
, 3);
693 geneveh
->proto_type
= htons(ETH_P_TEB
);
696 memcpy(geneveh
->options
, options
, options_len
);
699 static int geneve_build_skb(struct rtable
*rt
, struct sk_buff
*skb
,
700 __be16 tun_flags
, u8 vni
[3], u8 opt_len
, u8
*opt
,
701 u32 flags
, bool xnet
)
703 struct genevehdr
*gnvh
;
706 bool udp_sum
= !(flags
& GENEVE_F_UDP_ZERO_CSUM_TX
);
708 skb_scrub_packet(skb
, xnet
);
710 min_headroom
= LL_RESERVED_SPACE(rt
->dst
.dev
) + rt
->dst
.header_len
711 + GENEVE_BASE_HLEN
+ opt_len
+ sizeof(struct iphdr
);
712 err
= skb_cow_head(skb
, min_headroom
);
718 skb
= udp_tunnel_handle_offloads(skb
, udp_sum
);
724 gnvh
= (struct genevehdr
*)__skb_push(skb
, sizeof(*gnvh
) + opt_len
);
725 geneve_build_header(gnvh
, tun_flags
, vni
, opt_len
, opt
);
727 skb_set_inner_protocol(skb
, htons(ETH_P_TEB
));
735 #if IS_ENABLED(CONFIG_IPV6)
736 static int geneve6_build_skb(struct dst_entry
*dst
, struct sk_buff
*skb
,
737 __be16 tun_flags
, u8 vni
[3], u8 opt_len
, u8
*opt
,
738 u32 flags
, bool xnet
)
740 struct genevehdr
*gnvh
;
743 bool udp_sum
= !(flags
& GENEVE_F_UDP_ZERO_CSUM6_TX
);
745 skb_scrub_packet(skb
, xnet
);
747 min_headroom
= LL_RESERVED_SPACE(dst
->dev
) + dst
->header_len
748 + GENEVE_BASE_HLEN
+ opt_len
+ sizeof(struct ipv6hdr
);
749 err
= skb_cow_head(skb
, min_headroom
);
755 skb
= udp_tunnel_handle_offloads(skb
, udp_sum
);
761 gnvh
= (struct genevehdr
*)__skb_push(skb
, sizeof(*gnvh
) + opt_len
);
762 geneve_build_header(gnvh
, tun_flags
, vni
, opt_len
, opt
);
764 skb_set_inner_protocol(skb
, htons(ETH_P_TEB
));
773 static struct rtable
*geneve_get_v4_rt(struct sk_buff
*skb
,
774 struct net_device
*dev
,
776 struct ip_tunnel_info
*info
)
778 struct geneve_dev
*geneve
= netdev_priv(dev
);
779 struct dst_cache
*dst_cache
;
780 struct rtable
*rt
= NULL
;
781 bool use_cache
= true;
784 memset(fl4
, 0, sizeof(*fl4
));
785 fl4
->flowi4_mark
= skb
->mark
;
786 fl4
->flowi4_proto
= IPPROTO_UDP
;
789 fl4
->daddr
= info
->key
.u
.ipv4
.dst
;
790 fl4
->saddr
= info
->key
.u
.ipv4
.src
;
791 fl4
->flowi4_tos
= RT_TOS(info
->key
.tos
);
792 dst_cache
= &info
->dst_cache
;
796 const struct iphdr
*iip
= ip_hdr(skb
);
798 tos
= ip_tunnel_get_dsfield(iip
, skb
);
802 fl4
->flowi4_tos
= RT_TOS(tos
);
803 fl4
->daddr
= geneve
->remote
.sin
.sin_addr
.s_addr
;
804 dst_cache
= &geneve
->dst_cache
;
807 use_cache
= use_cache
&& !skb
->mark
;
809 rt
= dst_cache_get_ip4(dst_cache
, &fl4
->saddr
);
814 rt
= ip_route_output_key(geneve
->net
, fl4
);
816 netdev_dbg(dev
, "no route to %pI4\n", &fl4
->daddr
);
817 return ERR_PTR(-ENETUNREACH
);
819 if (rt
->dst
.dev
== dev
) { /* is this necessary? */
820 netdev_dbg(dev
, "circular route to %pI4\n", &fl4
->daddr
);
822 return ERR_PTR(-ELOOP
);
825 dst_cache_set_ip4(dst_cache
, &rt
->dst
, fl4
->saddr
);
829 #if IS_ENABLED(CONFIG_IPV6)
830 static struct dst_entry
*geneve_get_v6_dst(struct sk_buff
*skb
,
831 struct net_device
*dev
,
833 struct ip_tunnel_info
*info
)
835 struct geneve_dev
*geneve
= netdev_priv(dev
);
836 struct geneve_sock
*gs6
= geneve
->sock6
;
837 struct dst_entry
*dst
= NULL
;
838 struct dst_cache
*dst_cache
;
839 bool use_cache
= true;
842 memset(fl6
, 0, sizeof(*fl6
));
843 fl6
->flowi6_mark
= skb
->mark
;
844 fl6
->flowi6_proto
= IPPROTO_UDP
;
847 fl6
->daddr
= info
->key
.u
.ipv6
.dst
;
848 fl6
->saddr
= info
->key
.u
.ipv6
.src
;
849 fl6
->flowi6_tos
= RT_TOS(info
->key
.tos
);
850 dst_cache
= &info
->dst_cache
;
854 const struct iphdr
*iip
= ip_hdr(skb
);
856 prio
= ip_tunnel_get_dsfield(iip
, skb
);
860 fl6
->flowi6_tos
= RT_TOS(prio
);
861 fl6
->daddr
= geneve
->remote
.sin6
.sin6_addr
;
862 dst_cache
= &geneve
->dst_cache
;
865 use_cache
= use_cache
&& !skb
->mark
;
867 dst
= dst_cache_get_ip6(dst_cache
, &fl6
->saddr
);
872 if (ipv6_stub
->ipv6_dst_lookup(geneve
->net
, gs6
->sock
->sk
, &dst
, fl6
)) {
873 netdev_dbg(dev
, "no route to %pI6\n", &fl6
->daddr
);
874 return ERR_PTR(-ENETUNREACH
);
876 if (dst
->dev
== dev
) { /* is this necessary? */
877 netdev_dbg(dev
, "circular route to %pI6\n", &fl6
->daddr
);
879 return ERR_PTR(-ELOOP
);
883 dst_cache_set_ip6(dst_cache
, dst
, &fl6
->saddr
);
888 /* Convert 64 bit tunnel ID to 24 bit VNI. */
889 static void tunnel_id_to_vni(__be64 tun_id
, __u8
*vni
)
892 vni
[0] = (__force __u8
)(tun_id
>> 16);
893 vni
[1] = (__force __u8
)(tun_id
>> 8);
894 vni
[2] = (__force __u8
)tun_id
;
896 vni
[0] = (__force __u8
)((__force u64
)tun_id
>> 40);
897 vni
[1] = (__force __u8
)((__force u64
)tun_id
>> 48);
898 vni
[2] = (__force __u8
)((__force u64
)tun_id
>> 56);
902 static netdev_tx_t
geneve_xmit_skb(struct sk_buff
*skb
, struct net_device
*dev
,
903 struct ip_tunnel_info
*info
)
905 struct geneve_dev
*geneve
= netdev_priv(dev
);
906 struct geneve_sock
*gs4
= geneve
->sock4
;
907 struct rtable
*rt
= NULL
;
908 const struct iphdr
*iip
; /* interior IP header */
914 bool xnet
= !net_eq(geneve
->net
, dev_net(geneve
->dev
));
915 u32 flags
= geneve
->flags
;
917 if (geneve
->collect_md
) {
918 if (unlikely(!info
|| !(info
->mode
& IP_TUNNEL_INFO_TX
))) {
919 netdev_dbg(dev
, "no tunnel metadata\n");
922 if (info
&& ip_tunnel_info_af(info
) != AF_INET
)
926 rt
= geneve_get_v4_rt(skb
, dev
, &fl4
, info
);
932 sport
= udp_flow_src_port(geneve
->net
, skb
, 1, USHRT_MAX
, true);
933 skb_reset_mac_header(skb
);
938 const struct ip_tunnel_key
*key
= &info
->key
;
942 tunnel_id_to_vni(key
->tun_id
, vni
);
943 if (key
->tun_flags
& TUNNEL_GENEVE_OPT
)
944 opts
= ip_tunnel_info_opts(info
);
946 if (key
->tun_flags
& TUNNEL_CSUM
)
947 flags
&= ~GENEVE_F_UDP_ZERO_CSUM_TX
;
949 flags
|= GENEVE_F_UDP_ZERO_CSUM_TX
;
951 err
= geneve_build_skb(rt
, skb
, key
->tun_flags
, vni
,
952 info
->options_len
, opts
, flags
, xnet
);
956 tos
= ip_tunnel_ecn_encap(key
->tos
, iip
, skb
);
958 df
= key
->tun_flags
& TUNNEL_DONT_FRAGMENT
? htons(IP_DF
) : 0;
960 err
= geneve_build_skb(rt
, skb
, 0, geneve
->vni
,
961 0, NULL
, flags
, xnet
);
965 tos
= ip_tunnel_ecn_encap(fl4
.flowi4_tos
, iip
, skb
);
967 if (!ttl
&& IN_MULTICAST(ntohl(fl4
.daddr
)))
969 ttl
= ttl
? : ip4_dst_hoplimit(&rt
->dst
);
972 udp_tunnel_xmit_skb(rt
, gs4
->sock
->sk
, skb
, fl4
.saddr
, fl4
.daddr
,
973 tos
, ttl
, df
, sport
, geneve
->dst_port
,
974 !net_eq(geneve
->net
, dev_net(geneve
->dev
)),
975 !!(flags
& GENEVE_F_UDP_ZERO_CSUM_TX
));
983 dev
->stats
.collisions
++;
984 else if (err
== -ENETUNREACH
)
985 dev
->stats
.tx_carrier_errors
++;
987 dev
->stats
.tx_errors
++;
991 #if IS_ENABLED(CONFIG_IPV6)
992 static netdev_tx_t
geneve6_xmit_skb(struct sk_buff
*skb
, struct net_device
*dev
,
993 struct ip_tunnel_info
*info
)
995 struct geneve_dev
*geneve
= netdev_priv(dev
);
996 struct geneve_sock
*gs6
= geneve
->sock6
;
997 struct dst_entry
*dst
= NULL
;
998 const struct iphdr
*iip
; /* interior IP header */
1003 bool xnet
= !net_eq(geneve
->net
, dev_net(geneve
->dev
));
1004 u32 flags
= geneve
->flags
;
1006 if (geneve
->collect_md
) {
1007 if (unlikely(!info
|| !(info
->mode
& IP_TUNNEL_INFO_TX
))) {
1008 netdev_dbg(dev
, "no tunnel metadata\n");
1013 dst
= geneve_get_v6_dst(skb
, dev
, &fl6
, info
);
1019 sport
= udp_flow_src_port(geneve
->net
, skb
, 1, USHRT_MAX
, true);
1020 skb_reset_mac_header(skb
);
1025 const struct ip_tunnel_key
*key
= &info
->key
;
1029 tunnel_id_to_vni(key
->tun_id
, vni
);
1030 if (key
->tun_flags
& TUNNEL_GENEVE_OPT
)
1031 opts
= ip_tunnel_info_opts(info
);
1033 if (key
->tun_flags
& TUNNEL_CSUM
)
1034 flags
&= ~GENEVE_F_UDP_ZERO_CSUM6_TX
;
1036 flags
|= GENEVE_F_UDP_ZERO_CSUM6_TX
;
1038 err
= geneve6_build_skb(dst
, skb
, key
->tun_flags
, vni
,
1039 info
->options_len
, opts
,
1044 prio
= ip_tunnel_ecn_encap(key
->tos
, iip
, skb
);
1047 err
= geneve6_build_skb(dst
, skb
, 0, geneve
->vni
,
1048 0, NULL
, flags
, xnet
);
1052 prio
= ip_tunnel_ecn_encap(fl6
.flowi6_tos
, iip
, skb
);
1054 if (!ttl
&& ipv6_addr_is_multicast(&fl6
.daddr
))
1056 ttl
= ttl
? : ip6_dst_hoplimit(dst
);
1058 udp_tunnel6_xmit_skb(dst
, gs6
->sock
->sk
, skb
, dev
,
1059 &fl6
.saddr
, &fl6
.daddr
, prio
, ttl
,
1060 sport
, geneve
->dst_port
,
1061 !!(flags
& GENEVE_F_UDP_ZERO_CSUM6_TX
));
1062 return NETDEV_TX_OK
;
1068 dev
->stats
.collisions
++;
1069 else if (err
== -ENETUNREACH
)
1070 dev
->stats
.tx_carrier_errors
++;
1072 dev
->stats
.tx_errors
++;
1073 return NETDEV_TX_OK
;
1077 static netdev_tx_t
geneve_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
1079 struct geneve_dev
*geneve
= netdev_priv(dev
);
1080 struct ip_tunnel_info
*info
= NULL
;
1082 if (geneve
->collect_md
)
1083 info
= skb_tunnel_info(skb
);
1085 #if IS_ENABLED(CONFIG_IPV6)
1086 if ((info
&& ip_tunnel_info_af(info
) == AF_INET6
) ||
1087 (!info
&& geneve
->remote
.sa
.sa_family
== AF_INET6
))
1088 return geneve6_xmit_skb(skb
, dev
, info
);
1090 return geneve_xmit_skb(skb
, dev
, info
);
1093 static int geneve_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
)
1095 struct ip_tunnel_info
*info
= skb_tunnel_info(skb
);
1096 struct geneve_dev
*geneve
= netdev_priv(dev
);
1099 #if IS_ENABLED(CONFIG_IPV6)
1100 struct dst_entry
*dst
;
1104 if (ip_tunnel_info_af(info
) == AF_INET
) {
1105 rt
= geneve_get_v4_rt(skb
, dev
, &fl4
, info
);
1110 info
->key
.u
.ipv4
.src
= fl4
.saddr
;
1111 #if IS_ENABLED(CONFIG_IPV6)
1112 } else if (ip_tunnel_info_af(info
) == AF_INET6
) {
1113 dst
= geneve_get_v6_dst(skb
, dev
, &fl6
, info
);
1115 return PTR_ERR(dst
);
1118 info
->key
.u
.ipv6
.src
= fl6
.saddr
;
1124 info
->key
.tp_src
= udp_flow_src_port(geneve
->net
, skb
,
1125 1, USHRT_MAX
, true);
1126 info
->key
.tp_dst
= geneve
->dst_port
;
1130 static const struct net_device_ops geneve_netdev_ops
= {
1131 .ndo_init
= geneve_init
,
1132 .ndo_uninit
= geneve_uninit
,
1133 .ndo_open
= geneve_open
,
1134 .ndo_stop
= geneve_stop
,
1135 .ndo_start_xmit
= geneve_xmit
,
1136 .ndo_get_stats64
= ip_tunnel_get_stats64
,
1137 .ndo_change_mtu
= eth_change_mtu
,
1138 .ndo_validate_addr
= eth_validate_addr
,
1139 .ndo_set_mac_address
= eth_mac_addr
,
1140 .ndo_fill_metadata_dst
= geneve_fill_metadata_dst
,
1143 static void geneve_get_drvinfo(struct net_device
*dev
,
1144 struct ethtool_drvinfo
*drvinfo
)
1146 strlcpy(drvinfo
->version
, GENEVE_NETDEV_VER
, sizeof(drvinfo
->version
));
1147 strlcpy(drvinfo
->driver
, "geneve", sizeof(drvinfo
->driver
));
1150 static const struct ethtool_ops geneve_ethtool_ops
= {
1151 .get_drvinfo
= geneve_get_drvinfo
,
1152 .get_link
= ethtool_op_get_link
,
1155 /* Info for udev, that this is a virtual tunnel endpoint */
1156 static struct device_type geneve_type
= {
1160 /* Calls the ndo_add_geneve_port of the caller in order to
1161 * supply the listening GENEVE udp ports. Callers are expected
1162 * to implement the ndo_add_geneve_port.
1164 void geneve_get_rx_port(struct net_device
*dev
)
1166 struct net
*net
= dev_net(dev
);
1167 struct geneve_net
*gn
= net_generic(net
, geneve_net_id
);
1168 struct geneve_sock
*gs
;
1169 sa_family_t sa_family
;
1174 list_for_each_entry_rcu(gs
, &gn
->sock_list
, list
) {
1176 sa_family
= sk
->sk_family
;
1177 port
= inet_sk(sk
)->inet_sport
;
1178 dev
->netdev_ops
->ndo_add_geneve_port(dev
, sa_family
, port
);
1182 EXPORT_SYMBOL_GPL(geneve_get_rx_port
);
1184 /* Initialize the device structure. */
1185 static void geneve_setup(struct net_device
*dev
)
1189 dev
->netdev_ops
= &geneve_netdev_ops
;
1190 dev
->ethtool_ops
= &geneve_ethtool_ops
;
1191 dev
->destructor
= free_netdev
;
1193 SET_NETDEV_DEVTYPE(dev
, &geneve_type
);
1195 dev
->features
|= NETIF_F_LLTX
;
1196 dev
->features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
;
1197 dev
->features
|= NETIF_F_RXCSUM
;
1198 dev
->features
|= NETIF_F_GSO_SOFTWARE
;
1200 dev
->hw_features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
| NETIF_F_RXCSUM
;
1201 dev
->hw_features
|= NETIF_F_GSO_SOFTWARE
;
1203 netif_keep_dst(dev
);
1204 dev
->priv_flags
|= IFF_LIVE_ADDR_CHANGE
| IFF_NO_QUEUE
;
1205 eth_hw_addr_random(dev
);
1208 static const struct nla_policy geneve_policy
[IFLA_GENEVE_MAX
+ 1] = {
1209 [IFLA_GENEVE_ID
] = { .type
= NLA_U32
},
1210 [IFLA_GENEVE_REMOTE
] = { .len
= FIELD_SIZEOF(struct iphdr
, daddr
) },
1211 [IFLA_GENEVE_REMOTE6
] = { .len
= sizeof(struct in6_addr
) },
1212 [IFLA_GENEVE_TTL
] = { .type
= NLA_U8
},
1213 [IFLA_GENEVE_TOS
] = { .type
= NLA_U8
},
1214 [IFLA_GENEVE_PORT
] = { .type
= NLA_U16
},
1215 [IFLA_GENEVE_COLLECT_METADATA
] = { .type
= NLA_FLAG
},
1216 [IFLA_GENEVE_UDP_CSUM
] = { .type
= NLA_U8
},
1217 [IFLA_GENEVE_UDP_ZERO_CSUM6_TX
] = { .type
= NLA_U8
},
1218 [IFLA_GENEVE_UDP_ZERO_CSUM6_RX
] = { .type
= NLA_U8
},
1221 static int geneve_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
1223 if (tb
[IFLA_ADDRESS
]) {
1224 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
1227 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
1228 return -EADDRNOTAVAIL
;
1234 if (data
[IFLA_GENEVE_ID
]) {
1235 __u32 vni
= nla_get_u32(data
[IFLA_GENEVE_ID
]);
1237 if (vni
>= GENEVE_VID_MASK
)
1244 static struct geneve_dev
*geneve_find_dev(struct geneve_net
*gn
,
1246 union geneve_addr
*remote
,
1248 bool *tun_on_same_port
,
1249 bool *tun_collect_md
)
1251 struct geneve_dev
*geneve
, *t
;
1253 *tun_on_same_port
= false;
1254 *tun_collect_md
= false;
1256 list_for_each_entry(geneve
, &gn
->geneve_list
, next
) {
1257 if (geneve
->dst_port
== dst_port
) {
1258 *tun_collect_md
= geneve
->collect_md
;
1259 *tun_on_same_port
= true;
1261 if (!memcmp(vni
, geneve
->vni
, sizeof(geneve
->vni
)) &&
1262 !memcmp(remote
, &geneve
->remote
, sizeof(geneve
->remote
)) &&
1263 dst_port
== geneve
->dst_port
)
1269 static int geneve_configure(struct net
*net
, struct net_device
*dev
,
1270 union geneve_addr
*remote
,
1271 __u32 vni
, __u8 ttl
, __u8 tos
, __be16 dst_port
,
1272 bool metadata
, u32 flags
)
1274 struct geneve_net
*gn
= net_generic(net
, geneve_net_id
);
1275 struct geneve_dev
*t
, *geneve
= netdev_priv(dev
);
1276 bool tun_collect_md
, tun_on_same_port
;
1282 (remote
->sa
.sa_family
!= AF_UNSPEC
|| vni
|| tos
|| ttl
))
1288 geneve
->vni
[0] = (vni
& 0x00ff0000) >> 16;
1289 geneve
->vni
[1] = (vni
& 0x0000ff00) >> 8;
1290 geneve
->vni
[2] = vni
& 0x000000ff;
1292 if ((remote
->sa
.sa_family
== AF_INET
&&
1293 IN_MULTICAST(ntohl(remote
->sin
.sin_addr
.s_addr
))) ||
1294 (remote
->sa
.sa_family
== AF_INET6
&&
1295 ipv6_addr_is_multicast(&remote
->sin6
.sin6_addr
)))
1297 geneve
->remote
= *remote
;
1301 geneve
->dst_port
= dst_port
;
1302 geneve
->collect_md
= metadata
;
1303 geneve
->flags
= flags
;
1305 t
= geneve_find_dev(gn
, dst_port
, remote
, geneve
->vni
,
1306 &tun_on_same_port
, &tun_collect_md
);
1310 /* make enough headroom for basic scenario */
1311 encap_len
= GENEVE_BASE_HLEN
+ ETH_HLEN
;
1312 if (remote
->sa
.sa_family
== AF_INET
)
1313 encap_len
+= sizeof(struct iphdr
);
1315 encap_len
+= sizeof(struct ipv6hdr
);
1316 dev
->needed_headroom
= encap_len
+ ETH_HLEN
;
1319 if (tun_on_same_port
)
1326 dst_cache_reset(&geneve
->dst_cache
);
1328 err
= register_netdevice(dev
);
1332 list_add(&geneve
->next
, &gn
->geneve_list
);
1336 static int geneve_newlink(struct net
*net
, struct net_device
*dev
,
1337 struct nlattr
*tb
[], struct nlattr
*data
[])
1339 __be16 dst_port
= htons(GENEVE_UDP_PORT
);
1340 __u8 ttl
= 0, tos
= 0;
1341 bool metadata
= false;
1342 union geneve_addr remote
= geneve_remote_unspec
;
1346 if (data
[IFLA_GENEVE_REMOTE
] && data
[IFLA_GENEVE_REMOTE6
])
1349 if (data
[IFLA_GENEVE_REMOTE
]) {
1350 remote
.sa
.sa_family
= AF_INET
;
1351 remote
.sin
.sin_addr
.s_addr
=
1352 nla_get_in_addr(data
[IFLA_GENEVE_REMOTE
]);
1355 if (data
[IFLA_GENEVE_REMOTE6
]) {
1356 if (!IS_ENABLED(CONFIG_IPV6
))
1357 return -EPFNOSUPPORT
;
1359 remote
.sa
.sa_family
= AF_INET6
;
1360 remote
.sin6
.sin6_addr
=
1361 nla_get_in6_addr(data
[IFLA_GENEVE_REMOTE6
]);
1363 if (ipv6_addr_type(&remote
.sin6
.sin6_addr
) &
1364 IPV6_ADDR_LINKLOCAL
) {
1365 netdev_dbg(dev
, "link-local remote is unsupported\n");
1370 if (data
[IFLA_GENEVE_ID
])
1371 vni
= nla_get_u32(data
[IFLA_GENEVE_ID
]);
1373 if (data
[IFLA_GENEVE_TTL
])
1374 ttl
= nla_get_u8(data
[IFLA_GENEVE_TTL
]);
1376 if (data
[IFLA_GENEVE_TOS
])
1377 tos
= nla_get_u8(data
[IFLA_GENEVE_TOS
]);
1379 if (data
[IFLA_GENEVE_PORT
])
1380 dst_port
= nla_get_be16(data
[IFLA_GENEVE_PORT
]);
1382 if (data
[IFLA_GENEVE_COLLECT_METADATA
])
1385 if (data
[IFLA_GENEVE_UDP_CSUM
] &&
1386 !nla_get_u8(data
[IFLA_GENEVE_UDP_CSUM
]))
1387 flags
|= GENEVE_F_UDP_ZERO_CSUM_TX
;
1389 if (data
[IFLA_GENEVE_UDP_ZERO_CSUM6_TX
] &&
1390 nla_get_u8(data
[IFLA_GENEVE_UDP_ZERO_CSUM6_TX
]))
1391 flags
|= GENEVE_F_UDP_ZERO_CSUM6_TX
;
1393 if (data
[IFLA_GENEVE_UDP_ZERO_CSUM6_RX
] &&
1394 nla_get_u8(data
[IFLA_GENEVE_UDP_ZERO_CSUM6_RX
]))
1395 flags
|= GENEVE_F_UDP_ZERO_CSUM6_RX
;
1397 return geneve_configure(net
, dev
, &remote
, vni
, ttl
, tos
, dst_port
,
1401 static void geneve_dellink(struct net_device
*dev
, struct list_head
*head
)
1403 struct geneve_dev
*geneve
= netdev_priv(dev
);
1405 list_del(&geneve
->next
);
1406 unregister_netdevice_queue(dev
, head
);
1409 static size_t geneve_get_size(const struct net_device
*dev
)
1411 return nla_total_size(sizeof(__u32
)) + /* IFLA_GENEVE_ID */
1412 nla_total_size(sizeof(struct in6_addr
)) + /* IFLA_GENEVE_REMOTE{6} */
1413 nla_total_size(sizeof(__u8
)) + /* IFLA_GENEVE_TTL */
1414 nla_total_size(sizeof(__u8
)) + /* IFLA_GENEVE_TOS */
1415 nla_total_size(sizeof(__be16
)) + /* IFLA_GENEVE_PORT */
1416 nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */
1417 nla_total_size(sizeof(__u8
)) + /* IFLA_GENEVE_UDP_CSUM */
1418 nla_total_size(sizeof(__u8
)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */
1419 nla_total_size(sizeof(__u8
)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */
1423 static int geneve_fill_info(struct sk_buff
*skb
, const struct net_device
*dev
)
1425 struct geneve_dev
*geneve
= netdev_priv(dev
);
1428 vni
= (geneve
->vni
[0] << 16) | (geneve
->vni
[1] << 8) | geneve
->vni
[2];
1429 if (nla_put_u32(skb
, IFLA_GENEVE_ID
, vni
))
1430 goto nla_put_failure
;
1432 if (geneve
->remote
.sa
.sa_family
== AF_INET
) {
1433 if (nla_put_in_addr(skb
, IFLA_GENEVE_REMOTE
,
1434 geneve
->remote
.sin
.sin_addr
.s_addr
))
1435 goto nla_put_failure
;
1436 #if IS_ENABLED(CONFIG_IPV6)
1438 if (nla_put_in6_addr(skb
, IFLA_GENEVE_REMOTE6
,
1439 &geneve
->remote
.sin6
.sin6_addr
))
1440 goto nla_put_failure
;
1444 if (nla_put_u8(skb
, IFLA_GENEVE_TTL
, geneve
->ttl
) ||
1445 nla_put_u8(skb
, IFLA_GENEVE_TOS
, geneve
->tos
))
1446 goto nla_put_failure
;
1448 if (nla_put_be16(skb
, IFLA_GENEVE_PORT
, geneve
->dst_port
))
1449 goto nla_put_failure
;
1451 if (geneve
->collect_md
) {
1452 if (nla_put_flag(skb
, IFLA_GENEVE_COLLECT_METADATA
))
1453 goto nla_put_failure
;
1456 if (nla_put_u8(skb
, IFLA_GENEVE_UDP_CSUM
,
1457 !(geneve
->flags
& GENEVE_F_UDP_ZERO_CSUM_TX
)) ||
1458 nla_put_u8(skb
, IFLA_GENEVE_UDP_ZERO_CSUM6_TX
,
1459 !!(geneve
->flags
& GENEVE_F_UDP_ZERO_CSUM6_TX
)) ||
1460 nla_put_u8(skb
, IFLA_GENEVE_UDP_ZERO_CSUM6_RX
,
1461 !!(geneve
->flags
& GENEVE_F_UDP_ZERO_CSUM6_RX
)))
1462 goto nla_put_failure
;
1470 static struct rtnl_link_ops geneve_link_ops __read_mostly
= {
1472 .maxtype
= IFLA_GENEVE_MAX
,
1473 .policy
= geneve_policy
,
1474 .priv_size
= sizeof(struct geneve_dev
),
1475 .setup
= geneve_setup
,
1476 .validate
= geneve_validate
,
1477 .newlink
= geneve_newlink
,
1478 .dellink
= geneve_dellink
,
1479 .get_size
= geneve_get_size
,
1480 .fill_info
= geneve_fill_info
,
1483 struct net_device
*geneve_dev_create_fb(struct net
*net
, const char *name
,
1484 u8 name_assign_type
, u16 dst_port
)
1486 struct nlattr
*tb
[IFLA_MAX
+ 1];
1487 struct net_device
*dev
;
1490 memset(tb
, 0, sizeof(tb
));
1491 dev
= rtnl_create_link(net
, name
, name_assign_type
,
1492 &geneve_link_ops
, tb
);
1496 err
= geneve_configure(net
, dev
, &geneve_remote_unspec
,
1497 0, 0, 0, htons(dst_port
), true, 0);
1500 return ERR_PTR(err
);
1504 EXPORT_SYMBOL_GPL(geneve_dev_create_fb
);
1506 static __net_init
int geneve_init_net(struct net
*net
)
1508 struct geneve_net
*gn
= net_generic(net
, geneve_net_id
);
1510 INIT_LIST_HEAD(&gn
->geneve_list
);
1511 INIT_LIST_HEAD(&gn
->sock_list
);
1515 static void __net_exit
geneve_exit_net(struct net
*net
)
1517 struct geneve_net
*gn
= net_generic(net
, geneve_net_id
);
1518 struct geneve_dev
*geneve
, *next
;
1519 struct net_device
*dev
, *aux
;
1524 /* gather any geneve devices that were moved into this ns */
1525 for_each_netdev_safe(net
, dev
, aux
)
1526 if (dev
->rtnl_link_ops
== &geneve_link_ops
)
1527 unregister_netdevice_queue(dev
, &list
);
1529 /* now gather any other geneve devices that were created in this ns */
1530 list_for_each_entry_safe(geneve
, next
, &gn
->geneve_list
, next
) {
1531 /* If geneve->dev is in the same netns, it was already added
1532 * to the list by the previous loop.
1534 if (!net_eq(dev_net(geneve
->dev
), net
))
1535 unregister_netdevice_queue(geneve
->dev
, &list
);
1538 /* unregister the devices gathered above */
1539 unregister_netdevice_many(&list
);
1543 static struct pernet_operations geneve_net_ops
= {
1544 .init
= geneve_init_net
,
1545 .exit
= geneve_exit_net
,
1546 .id
= &geneve_net_id
,
1547 .size
= sizeof(struct geneve_net
),
1550 static int __init
geneve_init_module(void)
1554 rc
= register_pernet_subsys(&geneve_net_ops
);
1558 rc
= rtnl_link_register(&geneve_link_ops
);
1564 unregister_pernet_subsys(&geneve_net_ops
);
1568 late_initcall(geneve_init_module
);
1570 static void __exit
geneve_cleanup_module(void)
1572 rtnl_link_unregister(&geneve_link_ops
);
1573 unregister_pernet_subsys(&geneve_net_ops
);
1575 module_exit(geneve_cleanup_module
);
1577 MODULE_LICENSE("GPL");
1578 MODULE_VERSION(GENEVE_NETDEV_VER
);
1579 MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
1580 MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic");
1581 MODULE_ALIAS_RTNL_LINK("geneve");