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Commit 915d7e5e authored by David Lebrun's avatar David Lebrun Committed by David S. Miller
Browse files

ipv6: sr: add code base for control plane support of SR-IPv6 



This patch adds the necessary hooks and structures to provide support
for SR-IPv6 control plane, essentially the Generic Netlink commands
that will be used for userspace control over the Segment Routing
kernel structures.

The genetlink commands provide control over two different structures:
tunnel source and HMAC data. The tunnel source is the source address
that will be used by default when encapsulating packets into an
outer IPv6 header + SRH. If the tunnel source is set to :: then an
address of the outgoing interface will be selected as the source.

The HMAC commands currently just return ENOTSUPP and will be implemented
in a future patch.

Signed-off-by: default avatarDavid Lebrun <david.lebrun@uclouvain.be>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1ababeba

include/linux/seg6_genl.h

0 → 100644
+6 −0
Original line number Diff line number Diff line 
#ifndef _LINUX_SEG6_GENL_H

#define _LINUX_SEG6_GENL_H



#include <uapi/linux/seg6_genl.h>



#endif

include/net/netns/ipv6.h

+1 −0
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ struct netns_ipv6 { 
#endif

	atomic_t		dev_addr_genid;

	atomic_t		fib6_sernum;

	struct seg6_pernet_data *seg6_data;

};



#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)

include/net/seg6.h

+16 −0
Original line number Diff line number Diff line
@@ -14,6 +14,9 @@ 
#ifndef _NET_SEG6_H

#define _NET_SEG6_H



#include <linux/net.h>

#include <linux/ipv6.h>



static inline void update_csum_diff4(struct sk_buff *skb, __be32 from,

				     __be32 to)

{
@@ -33,4 +36,17 @@ static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from, 
	skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);

}



struct seg6_pernet_data {

	struct mutex lock;

	struct in6_addr __rcu *tun_src;

};



static inline struct seg6_pernet_data *seg6_pernet(struct net *net)

{

	return net->ipv6.seg6_data;

}



extern int seg6_init(void);

extern void seg6_exit(void);



#endif

include/uapi/linux/seg6_genl.h

0 → 100644
+32 −0
Original line number Diff line number Diff line 
#ifndef _UAPI_LINUX_SEG6_GENL_H

#define _UAPI_LINUX_SEG6_GENL_H



#define SEG6_GENL_NAME		"SEG6"

#define SEG6_GENL_VERSION	0x1



enum {

	SEG6_ATTR_UNSPEC,

	SEG6_ATTR_DST,

	SEG6_ATTR_DSTLEN,

	SEG6_ATTR_HMACKEYID,

	SEG6_ATTR_SECRET,

	SEG6_ATTR_SECRETLEN,

	SEG6_ATTR_ALGID,

	SEG6_ATTR_HMACINFO,

	__SEG6_ATTR_MAX,

};



#define SEG6_ATTR_MAX (__SEG6_ATTR_MAX - 1)



enum {

	SEG6_CMD_UNSPEC,

	SEG6_CMD_SETHMAC,

	SEG6_CMD_DUMPHMAC,

	SEG6_CMD_SET_TUNSRC,

	SEG6_CMD_GET_TUNSRC,

	__SEG6_CMD_MAX,

};



#define SEG6_CMD_MAX (__SEG6_CMD_MAX - 1)



#endif

net/ipv6/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -9,7 +9,7 @@ ipv6-objs := af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \ 
		route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o udplite.o \

		raw.o icmp.o mcast.o reassembly.o tcp_ipv6.o ping.o \

		exthdrs.o datagram.o ip6_flowlabel.o inet6_connection_sock.o \

		udp_offload.o

		udp_offload.o seg6.o



ipv6-offload :=	ip6_offload.o tcpv6_offload.o exthdrs_offload.o