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ip6_vti: support IP6IP6 tunnel processing with .cb_handler

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Similar to IPIP tunnel's processing, this patch is to support
IP6IP6 tunnel processing with .cb_handler.

v1->v2:
  - no change.
v2-v3:
  - enable it only when CONFIG_INET6_XFRM_TUNNEL is defined, to fix
    the build error, reported by kbuild test robot.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Xin Long 2020-07-06 20:01:34 +08:00 committed by Steffen Klassert
parent e6ce64570f
commit 08622869ed
1 changed files with 33 additions and 0 deletions
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33
net/ipv6/ip6_vti.c
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@ -1218,6 +1218,26 @@ static struct xfrm6_protocol vti_ipcomp6_protocol __read_mostly = {
.priority = 100,
};
#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)
static int vti6_rcv_tunnel(struct sk_buff *skb)
{
const xfrm_address_t *saddr;
__be32 spi;
saddr = (const xfrm_address_t *)&ipv6_hdr(skb)->saddr;
spi = xfrm6_tunnel_spi_lookup(dev_net(skb->dev), saddr);
return vti6_input_proto(skb, IPPROTO_IPV6, spi, 0);
}
static struct xfrm6_tunnel vti_ipv6_handler __read_mostly = {
.handler = vti6_rcv_tunnel,
.cb_handler = vti6_rcv_cb,
.err_handler = vti6_err,
.priority = 0,
};
#endif
/**
* vti6_tunnel_init - register protocol and reserve needed resources
*
@ -1243,6 +1263,12 @@ static int __init vti6_tunnel_init(void)
err = xfrm6_protocol_register(&vti_ipcomp6_protocol, IPPROTO_COMP);
if (err < 0)
goto xfrm_proto_comp_failed;
#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)
msg = "ipv6 tunnel";
err = xfrm6_tunnel_register(&vti_ipv6_handler, AF_INET6);
if (err < 0)
goto vti_tunnel_failed;
#endif
msg = "netlink interface";
err = rtnl_link_register(&vti6_link_ops);
@ -1252,6 +1278,10 @@ static int __init vti6_tunnel_init(void)
return 0;
rtnl_link_failed:
#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)
err = xfrm6_tunnel_deregister(&vti_ipv6_handler, AF_INET6);
vti_tunnel_failed:
#endif
xfrm6_protocol_deregister(&vti_ipcomp6_protocol, IPPROTO_COMP);
xfrm_proto_comp_failed:
xfrm6_protocol_deregister(&vti_ah6_protocol, IPPROTO_AH);
@ -1270,6 +1300,9 @@ pernet_dev_failed:
static void __exit vti6_tunnel_cleanup(void)
{
rtnl_link_unregister(&vti6_link_ops);
#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)
xfrm6_tunnel_deregister(&vti_ipv6_handler, AF_INET6);
#endif
xfrm6_protocol_deregister(&vti_ipcomp6_protocol, IPPROTO_COMP);
xfrm6_protocol_deregister(&vti_ah6_protocol, IPPROTO_AH);
xfrm6_protocol_deregister(&vti_esp6_protocol, IPPROTO_ESP);