1/* $NetBSD: net_stats.h,v 1.6 2024/06/29 13:01:30 riastradh 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 struct net_stat_ref {
39 /*
40 * Flexible array member annoyingly requires some other
41 * non-flexible array member.
42 */
43 uint64_t nsr_stat[1];
44 uint64_t nsr_stats[];
45} *net_stat_ref_t;
46
47#define _NET_STAT_GETREF(stat) ((net_stat_ref_t)percpu_getref((stat)))
48#define _NET_STAT_PUTREF(stat) percpu_putref((stat))
49
50#define _NET_STATINC_REF(r, x) \
51do { \
52 uint64_t *_stat_ = (r)->nsr_stat; \
53 _stat_[x]++; \
54} while (/*CONSTCOND*/0)
55
56#define _NET_STATINC(stat, x) \
57do { \
58 net_stat_ref_t _nsr_ = _NET_STAT_GETREF(stat); \
59 _NET_STATINC_REF(_nsr_, x); \
60 _NET_STAT_PUTREF(stat); \
61} while (/*CONSTCOND*/0)
62
63#define _NET_STATDEC_REF(r, x) \
64do { \
65 uint64_t *_stat_ = (r)->nsr_stat; \
66 _stat_[x]--; \
67} while (/*CONSTCOND*/0)
68
69#define _NET_STATDEC(stat, x) \
70do { \
71 net_stat_ref_t _nsr_ = _NET_STAT_GETREF(stat); \
72 _NET_STATDEC_REF(_nsr_, x); \
73 _NET_STAT_PUTREF(stat); \
74} while (/*CONSTCOND*/0)
75
76#define _NET_STATADD_REF(r, x, v) \
77do { \
78 uint64_t *_stat_ = (r)->nsr_stat; \
79 _stat_[x] += (v); \
80} while (/*CONSTCOND*/0)
81
82#define _NET_STATADD(stat, x, v) \
83do { \
84 net_stat_ref_t _nsr_ = _NET_STAT_GETREF(stat); \
85 _NET_STATADD_REF(_nsr_, x, v); \
86 _NET_STAT_PUTREF(stat); \
87} while (/*CONSTCOND*/0)
88
89#define _NET_STATSUB_REF(r, x, v) \
90do { \
91 uint64_t *_stat_ = (r)->nsr_stat; \
92 _stat_[x] -= (v); \
93} while (/*CONSTCOND*/0)
94
95#define _NET_STATSUB(stat, x, v) \
96do { \
97 net_stat_ref_t _nsr_ = _NET_STAT_GETREF(stat); \
98 _NET_STATSUB_REF(_nsr_, x, v); \
99 _NET_STAT_PUTREF(stat); \
100} while (/*CONSTCOND*/0)
101
102__BEGIN_DECLS
103struct lwp;
104struct sysctlnode;
105
106int netstat_sysctl(percpu_t *, u_int,
107 const int *, u_int, void *,
108 size_t *, const void *, size_t,
109 const int *, struct lwp *, const struct sysctlnode *);
110
111#define NETSTAT_SYSCTL(stat, nctrs) \
112 netstat_sysctl((stat), (nctrs), name, namelen, oldp, oldlenp, \
113 newp, newlen, oname, l, rnode)
114__END_DECLS
115#endif /* _KERNEL */
116
117#endif /* !_NET_NET_STATS_H_ */