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_ */
111