1/*	$NetBSD: net_stats.h,v 1.5 2020/01/29 03:04:55 thorpej Exp $	*/
  2
  3/*-
  4 * Copyright (c) 2008, 2020 The NetBSD Foundation, Inc.
  5 * All rights reserved.
  6 *
  7 * This code is derived from software contributed to The NetBSD Foundation
  8 * by Jason R. Thorpe.
  9 *
 10 * Redistribution and use in source and binary forms, with or without
 11 * modification, are permitted provided that the following conditions
 12 * are met:
 13 * 1. Redistributions of source code must retain the above copyright
 14 *    notice, this list of conditions and the following disclaimer.
 15 * 2. Redistributions in binary form must reproduce the above copyright
 16 *    notice, this list of conditions and the following disclaimer in the
 17 *    documentation and/or other materials provided with the distribution.
 18 *
 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 29 * POSSIBILITY OF SUCH DAMAGE.
 30 */
 31
 32#ifndef _NET_NET_STATS_H_
 33#define _NET_NET_STATS_H_
 34
 35#ifdef _KERNEL
 36#include <sys/percpu.h>
 37
 38typedef void *net_stat_ref_t;
 39
 40#define	_NET_STAT_GETREF(stat)	((net_stat_ref_t)percpu_getref((stat)))
 41#define	_NET_STAT_PUTREF(stat)	percpu_putref((stat))
 42
 43#define	_NET_STATINC_REF(r, x)						\
 44do {									\
 45	uint64_t *_stat_ = (r);						\
 46	_stat_[x]++;							\
 47} while (/*CONSTCOND*/0)
 48
 49#define	_NET_STATINC(stat, x)						\
 50do {									\
 51	net_stat_ref_t _nsr_ = _NET_STAT_GETREF(stat);			\
 52	_NET_STATINC_REF(_nsr_, x);					\
 53	_NET_STAT_PUTREF(stat);						\
 54} while (/*CONSTCOND*/0)
 55
 56#define	_NET_STATDEC_REF(r, x)						\
 57do {									\
 58	uint64_t *_stat_ = (r);						\
 59	_stat_[x]--;							\
 60} while (/*CONSTCOND*/0)
 61
 62#define	_NET_STATDEC(stat, x)						\
 63do {									\
 64	net_stat_ref_t _nsr_ = _NET_STAT_GETREF(stat);			\
 65	_NET_STATDEC_REF(_nsr_, x);					\
 66	_NET_STAT_PUTREF(stat);						\
 67} while (/*CONSTCOND*/0)
 68
 69#define	_NET_STATADD_REF(r, x, v)					\
 70do {									\
 71	uint64_t *_stat_ = (r);						\
 72	_stat_[x] += (v);						\
 73} while (/*CONSTCOND*/0)
 74
 75#define	_NET_STATADD(stat, x, v)					\
 76do {									\
 77	net_stat_ref_t _nsr_ = _NET_STAT_GETREF(stat);			\
 78	_NET_STATADD_REF(_nsr_, x, v);					\
 79	_NET_STAT_PUTREF(stat);						\
 80} while (/*CONSTCOND*/0)
 81
 82#define	_NET_STATSUB_REF(r, x, v)					\
 83do {									\
 84	uint64_t *_stat_ = (r);						\
 85	_stat_[x] -= (v);						\
 86} while (/*CONSTCOND*/0)
 87
 88#define	_NET_STATSUB(stat, x, v)					\
 89do {									\
 90	net_stat_ref_t _nsr_ = _NET_STAT_GETREF(stat);			\
 91	_NET_STATSUB_REF(_nsr_, x, v);					\
 92	_NET_STAT_PUTREF(stat);						\
 93} while (/*CONSTCOND*/0)
 94
 95__BEGIN_DECLS
 96struct lwp;
 97struct sysctlnode;
 98
 99int	netstat_sysctl(percpu_t *, u_int,
100		       const int *, u_int, void *,
101		       size_t *, const void *, size_t,
102		       const int *, struct lwp *, const struct sysctlnode *);
103
104#define	NETSTAT_SYSCTL(stat, nctrs)					\
105	netstat_sysctl((stat), (nctrs), name, namelen, oldp, oldlenp,	\
106		       newp, newlen, oname, l, rnode)
107__END_DECLS
108#endif /* _KERNEL */
109
110#endif /* !_NET_NET_STATS_H_ */