[IPV6]: make the protocol initialization to return an error code

This patchset makes the different protocols to return an error code, so
the af_inet6 module can check the initialization was correct or not.

The raw6 was taken into account to be consistent with the rest of the
protocols, but the registration is at the same place.
Because the raw6 has its own init function, the proto and the ops structure
can be moved inside the raw6.c file.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 52 insertions, 0 deletions

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index b34631e..850b83e 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -1273,3 +1273,55 @@ void raw6_proc_exit(void)
 	proc_net_remove(&init_net, "raw6");
 }
 #endif	/* CONFIG_PROC_FS */
+
+/* Same as inet6_dgram_ops, sans udp_poll.  */
+static const struct proto_ops inet6_sockraw_ops = {
+	.family		   = PF_INET6,
+	.owner		   = THIS_MODULE,
+	.release	   = inet6_release,
+	.bind		   = inet6_bind,
+	.connect	   = inet_dgram_connect,	/* ok		*/
+	.socketpair	   = sock_no_socketpair,	/* a do nothing	*/
+	.accept		   = sock_no_accept,		/* a do nothing	*/
+	.getname	   = inet6_getname,
+	.poll		   = datagram_poll,		/* ok		*/
+	.ioctl		   = inet6_ioctl,		/* must change  */
+	.listen		   = sock_no_listen,		/* ok		*/
+	.shutdown	   = inet_shutdown,		/* ok		*/
+	.setsockopt	   = sock_common_setsockopt,	/* ok		*/
+	.getsockopt	   = sock_common_getsockopt,	/* ok		*/
+	.sendmsg	   = inet_sendmsg,		/* ok		*/
+	.recvmsg	   = sock_common_recvmsg,	/* ok		*/
+	.mmap		   = sock_no_mmap,
+	.sendpage	   = sock_no_sendpage,
+#ifdef CONFIG_COMPAT
+	.compat_setsockopt = compat_sock_common_setsockopt,
+	.compat_getsockopt = compat_sock_common_getsockopt,
+#endif
+};
+
+static struct inet_protosw rawv6_protosw = {
+	.type		= SOCK_RAW,
+	.protocol	= IPPROTO_IP,	/* wild card */
+	.prot		= &rawv6_prot,
+	.ops		= &inet6_sockraw_ops,
+	.capability	= CAP_NET_RAW,
+	.no_check	= UDP_CSUM_DEFAULT,
+	.flags		= INET_PROTOSW_REUSE,
+};
+
+int __init rawv6_init(void)
+{
+	int ret;
+
+	ret = inet6_register_protosw(&rawv6_protosw);
+	if (ret)
+		goto out;
+out:
+	return ret;
+}
+
+void __exit rawv6_exit(void)
+{
+	inet6_unregister_protosw(&rawv6_protosw);
+}