[NETFILTER]: introduce and use aligned_u64 data type

As proposed by Andi Kleen, this is required esp. for x86_64 architecture,
where 64bit code needs 8byte aligned 64bit data types, but 32bit userspace
apps will only align to 4bytes.
Signed-off-by: NHarald Welte <laforge@netfilter.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/netfilter/nfnetlink_log.h

@@ -5,6 +5,7 @@
  * and not any kind of function definitions.  It is shared between kernel and
  * userspace.  Don't put kernel specific stuff in here */
 
+#include <linux/types.h>
 #include <linux/netfilter/nfnetlink.h>
 
 enum nfulnl_msg_types {
@@ -27,8 +28,8 @@ struct nfulnl_msg_packet_hw {
 } __attribute__ ((packed));
 
 struct nfulnl_msg_packet_timestamp {
-	u_int64_t	sec;
-	u_int64_t	usec;
+	aligned_u64	sec;
+	aligned_u64	usec;
 } __attribute__ ((packed));
 
 #define NFULNL_PREFIXLEN	30	/* just like old log target */

include/linux/netfilter/nfnetlink_queue.h

 #ifndef _NFNETLINK_QUEUE_H
 #define _NFNETLINK_QUEUE_H
 
+#include <linux/types.h>
 #include <linux/netfilter/nfnetlink.h>
 
 enum nfqnl_msg_types {
@@ -24,8 +25,8 @@ struct nfqnl_msg_packet_hw {
 } __attribute__ ((packed));
 
 struct nfqnl_msg_packet_timestamp {
-	u_int64_t	sec;
-	u_int64_t	usec;
+	aligned_u64	sec;
+	aligned_u64	usec;
 } __attribute__ ((packed));
 
 enum nfqnl_attr_type {

include/linux/types.h

@@ -123,6 +123,9 @@ typedef		__u64		u_int64_t;
 typedef		__s64		int64_t;
 #endif
 
+/* this is a special 64bit data type that is 8-byte aligned */
+#define aligned_u64 unsigned long long __attribute__((aligned(8)))
+
 /*
  * The type used for indexing onto a disc or disc partition.
  * If required, asm/types.h can override it and define