netfilter: ipset: Fix hashing for ipv6 sets

HKEY_DATALEN remains defined after first inclusion
of ip_set_hash_gen.h, so it is incorrectly reused
for IPv6 code.

Undefine HKEY_DATALEN in ip_set_hash_gen.h at the end.

Also remove some useless defines of HKEY_DATALEN in
ip_set_hash_{ip{,mark,port},netiface}.c as ip_set_hash_gen.h
defines it correctly for such set types anyway.
Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua>
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/ipset/ip_set_hash_gen.h

@@ -1166,3 +1166,5 @@ IPSET_TOKEN(HTYPE, _create)(struct net *net, struct ip_set *set,
 	return 0;
 }
 #endif /* IP_SET_EMIT_CREATE */
+
+#undef HKEY_DATALEN

net/netfilter/ipset/ip_set_hash_ip.c

@@ -211,7 +211,6 @@ hash_ip6_data_next(struct hash_ip4_elem *next, const struct hash_ip6_elem *e)
 
 #undef MTYPE
 #undef HOST_MASK
-#undef HKEY_DATALEN
 
 #define MTYPE		hash_ip6
 #define HOST_MASK	128

net/netfilter/ipset/ip_set_hash_ipmark.c

@@ -78,7 +78,6 @@ hash_ipmark4_data_next(struct hash_ipmark4_elem *next,
 
 #define MTYPE           hash_ipmark4
 #define HOST_MASK       32
-#define HKEY_DATALEN	sizeof(struct hash_ipmark4_elem)
 #include "ip_set_hash_gen.h"
 
 static int
@@ -207,11 +206,9 @@ hash_ipmark6_data_next(struct hash_ipmark4_elem *next,
 
 #undef MTYPE
 #undef HOST_MASK
-#undef HKEY_DATALEN
 
 #define MTYPE		hash_ipmark6
 #define HOST_MASK	128
-#define HKEY_DATALEN	sizeof(struct hash_ipmark6_elem)
 #define	IP_SET_EMIT_CREATE
 #include "ip_set_hash_gen.h"
 

net/netfilter/ipset/ip_set_hash_ipport.c

@@ -85,7 +85,6 @@ hash_ipport4_data_next(struct hash_ipport4_elem *next,
 
 #define MTYPE           hash_ipport4
 #define HOST_MASK       32
-#define HKEY_DATALEN	sizeof(struct hash_ipport4_elem)
 #include "ip_set_hash_gen.h"
 
 static int
@@ -245,11 +244,9 @@ hash_ipport6_data_next(struct hash_ipport4_elem *next,
 
 #undef MTYPE
 #undef HOST_MASK
-#undef HKEY_DATALEN
 
 #define MTYPE		hash_ipport6
 #define HOST_MASK	128
-#define HKEY_DATALEN	sizeof(struct hash_ipport6_elem)
 #define	IP_SET_EMIT_CREATE
 #include "ip_set_hash_gen.h"
 

net/netfilter/ipset/ip_set_hash_netiface.c

@@ -460,7 +460,6 @@ hash_netiface6_data_next(struct hash_netiface4_elem *next,
 
 #undef MTYPE
 #undef HOST_MASK
-#undef HKEY_DATALEN
 
 #define MTYPE		hash_netiface6
 #define HOST_MASK	128