Update stats in struct carpstats using two new macros: CARPSTATS_ADD()

and CARPSTATS_INC(), rather than directly manipulating the fields of
the structure.  This will make it easier to change the implementation
of these statistics, such as using per-CPU versions of the data
structure.

MFC after:	3 days

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/netinet/ip_carp.h b/sys/netinet/ip_carp.h
index 2dd954453e0b..47bb494fc9f1 100644
--- a/sys/netinet/ip_carp.h
+++ b/sys/netinet/ip_carp.h
@@ -117,6 +117,11 @@ struct carpstats {
 	uint64_t	carps_preempt;		/* if enabled, preemptions */
 };
 
+#ifdef _KERNEL
+#define	CARPSTATS_ADD(name, val)	carpstats.name += (val)
+#define	CARPSTATS_INC(name)		CARPSTATS_ADD(name, 1)
+#endif
+
 /*
  * Configuration structure for SIOCSVH SIOCGVH
  */