[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, 33 insertions, 44 deletions

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 53b06de696bd..34c20533ba5d 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -529,42 +529,6 @@ static struct net_proto_family inet6_family_ops = {
 	.owner	= THIS_MODULE,
 };
 
-/* 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 inet6_register_protosw(struct inet_protosw *p)
 {
 	struct list_head *lh;
@@ -771,7 +735,6 @@ static int __init inet6_init(void)
 	__this_module.can_unload = &ipv6_unload;
 #endif
 #endif
-
 	err = proto_register(&tcpv6_prot, 1);
 	if (err)
 		goto out;
@@ -796,14 +759,16 @@ static int __init inet6_init(void)
 	/* We MUST register RAW sockets before we create the ICMP6,
 	 * IGMP6, or NDISC control sockets.
 	 */
-	inet6_register_protosw(&rawv6_protosw);
+	err = rawv6_init();
+	if (err)
+		goto out_unregister_raw_proto;
 
 	/* Register the family here so that the init calls below will
 	 * be able to create sockets. (?? is this dangerous ??)
 	 */
 	err = sock_register(&inet6_family_ops);
 	if (err)
-		goto out_unregister_raw_proto;
+		goto out_sock_register_fail;
 
 	/* Initialise ipv6 mibs */
 	err = init_ipv6_mibs();
@@ -871,15 +836,32 @@ static int __init inet6_init(void)
 		goto ipv6_frag_fail;
 
 	/* Init v6 transport protocols. */
-	udpv6_init();
-	udplitev6_init();
-	tcpv6_init();
+	err = udpv6_init();
+	if (err)
+		goto udpv6_fail;
 
-	ipv6_packet_init();
-	err = 0;
+	err = udplitev6_init();
+	if (err)
+		goto udplitev6_fail;
+
+	err = tcpv6_init();
+	if (err)
+		goto tcpv6_fail;
+
+	err = ipv6_packet_init();
+	if (err)
+		goto ipv6_packet_fail;
 out:
 	return err;
 
+ipv6_packet_fail:
+	tcpv6_exit();
+tcpv6_fail:
+	udplitev6_exit();
+udplitev6_fail:
+	udpv6_exit();
+udpv6_fail:
+	ipv6_frag_exit();
 ipv6_frag_fail:
 	ipv6_exthdrs_exit();
 ipv6_exthdrs_fail:
@@ -920,6 +902,8 @@ icmp_fail:
 out_unregister_sock:
 	sock_unregister(PF_INET6);
 	rtnl_unregister_all(PF_INET6);
+out_sock_register_fail:
+	rawv6_exit();
 out_unregister_raw_proto:
 	proto_unregister(&rawv6_prot);
 out_unregister_udplite_proto:
@@ -939,6 +923,10 @@ static void __exit inet6_exit(void)
 	/* Disallow any further netlink messages */
 	rtnl_unregister_all(PF_INET6);
 
+	udpv6_exit();
+	udplitev6_exit();
+	tcpv6_exit();
+
 	/* Cleanup code parts. */
 	ipv6_packet_cleanup();
 	ipv6_frag_exit();
@@ -961,6 +949,7 @@ static void __exit inet6_exit(void)
 	igmp6_cleanup();
 	ndisc_cleanup();
 	icmpv6_cleanup();
+	rawv6_exit();
 #ifdef CONFIG_SYSCTL
 	ipv6_sysctl_unregister();
 #endif