ipv6: Export ipv6 functions for use by other protocols

For implementing other protocols on top of IPv6, such as L2TPv3's IP
encapsulation over ipv6, we'd like to call some IPv6 functions which
are not currently exported. This patch exports them.
Signed-off-by: NChris Elston <celston@katalix.com>
Signed-off-by: NJames Chapman <jchapman@katalix.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/datagram.c

@@ -22,6 +22,7 @@
 #include <linux/ipv6.h>
 #include <linux/route.h>
 #include <linux/slab.h>
+#include <linux/export.h>
 
 #include <net/ipv6.h>
 #include <net/ndisc.h>
@@ -202,6 +203,7 @@ int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	fl6_sock_release(flowlabel);
 	return err;
 }
+EXPORT_SYMBOL_GPL(ip6_datagram_connect);
 
 void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
 		     __be16 port, u32 info, u8 *payload)
@@ -414,6 +416,7 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
 out:
 	return err;
 }
+EXPORT_SYMBOL_GPL(ipv6_recv_error);
 
 /*
  *	Handle IPV6_RECVPATHMTU
@@ -868,3 +871,4 @@ int datagram_send_ctl(struct net *net, struct sock *sk,
 exit_f:
 	return err;
 }
+EXPORT_SYMBOL_GPL(datagram_send_ctl);

net/ipv6/exthdrs.c

@@ -883,6 +883,7 @@ struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
 
 	return opt;
 }
+EXPORT_SYMBOL_GPL(ipv6_fixup_options);
 
 /**
  * fl6_update_dst - update flowi destination address with info given

net/ipv6/ip6_flowlabel.c

@@ -294,6 +294,7 @@ struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
 	opt_space->opt_flen = fopt->opt_flen;
 	return opt_space;
 }
+EXPORT_SYMBOL_GPL(fl6_merge_options);
 
 static unsigned long check_linger(unsigned long ttl)
 {

net/ipv6/ip6_output.c

@@ -1535,6 +1535,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 	IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 	return err;
 }
+EXPORT_SYMBOL_GPL(ip6_append_data);
 
 static void ip6_cork_release(struct inet_sock *inet, struct ipv6_pinfo *np)
 {
@@ -1638,6 +1639,7 @@ int ip6_push_pending_frames(struct sock *sk)
 	IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 	goto out;
 }
+EXPORT_SYMBOL_GPL(ip6_push_pending_frames);
 
 void ip6_flush_pending_frames(struct sock *sk)
 {
@@ -1652,3 +1654,4 @@ void ip6_flush_pending_frames(struct sock *sk)
 
 	ip6_cork_release(inet_sk(sk), inet6_sk(sk));
 }
+EXPORT_SYMBOL_GPL(ip6_flush_pending_frames);