Use percpu counters for ip6stat

Try to follow the existing examples.  Some notes:
- don't implement counters_dec() yet, which could be used in two
  similar chunks of code.  Let's see if there are more users first.
- stop incrementing IPv6-specific mbuf stats, IPv4 has no equivalent.

Input from mpi@, ok bluhm@ mpi@

1 files changed, 3 insertions, 3 deletions

diff --git a/sys/netinet/ipsec_input.c b/sys/netinet/ipsec_input.c
index c5952707aaa..188b21885ca 100644
--- a/sys/netinet/ipsec_input.c
+++ b/sys/netinet/ipsec_input.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ipsec_input.c,v 1.141 2017/01/29 19:58:47 bluhm Exp $	*/
+/*	$OpenBSD: ipsec_input.c,v 1.142 2017/02/05 16:04:14 jca Exp $	*/
 /*
  * The authors of this code are John Ioannidis (ji@tla.org),
  * Angelos D. Keromytis (kermit@csd.uch.gr) and
@@ -985,7 +985,7 @@ ah6_input_cb(struct mbuf *m, int off, int protoff)
 	 */
 	while (nxt != IPPROTO_DONE) {
 		if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
-			ip6stat.ip6s_toomanyhdr++;
+			ip6stat_inc(ip6s_toomanyhdr);
 			goto bad;
 		}
 
@@ -994,7 +994,7 @@ ah6_input_cb(struct mbuf *m, int off, int protoff)
 		 * more sanity checks in header chain processing.
 		 */
 		if (m->m_pkthdr.len < off) {
-			ip6stat.ip6s_tooshort++;
+			ip6stat_inc(ip6s_tooshort);
 			goto bad;
 		}
 		nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);