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 38 typedef 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) \ 51 do { \ 52 uint64_t *_stat_ = (r)->nsr_stat; \ 53 _stat_[x]++; \ 54 } while (/*CONSTCOND*/0) 55 56 #define _NET_STATINC(stat, x) \ 57 do { \ 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) \ 64 do { \ 65 uint64_t *_stat_ = (r)->nsr_stat; \ 66 _stat_[x]--; \ 67 } while (/*CONSTCOND*/0) 68 69 #define _NET_STATDEC(stat, x) \ 70 do { \ 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) \ 77 do { \ 78 uint64_t *_stat_ = (r)->nsr_stat; \ 79 _stat_[x] += (v); \ 80 } while (/*CONSTCOND*/0) 81 82 #define _NET_STATADD(stat, x, v) \ 83 do { \ 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) \ 90 do { \ 91 uint64_t *_stat_ = (r)->nsr_stat; \ 92 _stat_[x] -= (v); \ 93 } while (/*CONSTCOND*/0) 94 95 #define _NET_STATSUB(stat, x, v) \ 96 do { \ 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 103 struct lwp; 104 struct sysctlnode; 105 106 int 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_ */ 118