[XFRM]: Add module alias for transformation type.

It is clean-up for XFRM type modules and adds aliases with its
protocol:
 ESP, AH, IPCOMP, IPIP and IPv6 for IPsec
 ROUTING and DSTOPTS for MIPv6

It is almost the same thing as XFRM mode alias, but it is added
new defines XFRM_PROTO_XXX for preprocessing since some protocols
are defined as enum.
Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Acked-by: Ingo Oeser <netdev@axxeo.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/xfrm.h

@@ -19,9 +19,19 @@
 #include <net/ipv6.h>
 #include <net/ip6_fib.h>
 
+#define XFRM_PROTO_ESP		50
+#define XFRM_PROTO_AH		51
+#define XFRM_PROTO_COMP		108
+#define XFRM_PROTO_IPIP		4
+#define XFRM_PROTO_IPV6		41
+#define XFRM_PROTO_ROUTING	IPPROTO_ROUTING
+#define XFRM_PROTO_DSTOPTS	IPPROTO_DSTOPTS
+
 #define XFRM_ALIGN8(len)	(((len) + 7) & ~7)
 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
 	MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
+#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
+	MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
 
 extern struct sock *xfrm_nl;
 extern u32 sysctl_xfrm_aevent_etime;

net/ipv4/ah4.c

@@ -339,3 +339,4 @@ static void __exit ah4_fini(void)
 module_init(ah4_init);
 module_exit(ah4_fini);
 MODULE_LICENSE("GPL");
+MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_AH);

net/ipv4/esp4.c

@@ -481,3 +481,4 @@ static void __exit esp4_fini(void)
 module_init(esp4_init);
 module_exit(esp4_fini);
 MODULE_LICENSE("GPL");
+MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_ESP);

net/ipv4/ipcomp.c

@@ -485,3 +485,4 @@ MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("IP Payload Compression Protocol (IPComp) - RFC3173");
 MODULE_AUTHOR("James Morris <jmorris@intercode.com.au>");
 
+MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_COMP);

net/ipv4/xfrm4_tunnel.c

@@ -109,3 +109,4 @@ static void __exit ipip_fini(void)
 module_init(ipip_init);
 module_exit(ipip_fini);
 MODULE_LICENSE("GPL");
+MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_IPIP);

net/ipv6/ah6.c

@@ -554,3 +554,4 @@ module_init(ah6_init);
 module_exit(ah6_fini);
 
 MODULE_LICENSE("GPL");
+MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_AH);

net/ipv6/esp6.c

@@ -421,3 +421,4 @@ module_init(esp6_init);
 module_exit(esp6_fini);
 
 MODULE_LICENSE("GPL");
+MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_ESP);

net/ipv6/ipcomp6.c

@@ -500,4 +500,4 @@ MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("IP Payload Compression Protocol (IPComp) for IPv6 - RFC3173");
 MODULE_AUTHOR("Mitsuru KANDA <mk@linux-ipv6.org>");
 
-
+MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_COMP);

net/ipv6/mip6.c

@@ -514,3 +514,5 @@ module_init(mip6_init);
 module_exit(mip6_fini);
 
 MODULE_LICENSE("GPL");
+MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_DSTOPTS);
+MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_ROUTING);

net/ipv6/xfrm6_tunnel.c

@@ -379,3 +379,4 @@ static void __exit xfrm6_tunnel_fini(void)
 module_init(xfrm6_tunnel_init);
 module_exit(xfrm6_tunnel_fini);
 MODULE_LICENSE("GPL");
+MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_IPV6);