net_stats.h

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    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 
   38 typedef 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)                                          \
   44 do {                                                                    \
   45         uint64_t *_stat_ = (r);                                         \
   46         _stat_[x]++;                                                    \
   47 } while (/*CONSTCOND*/0)
   48 
   49 #define _NET_STATINC(stat, x)                                           \
   50 do {                                                                    \
   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)                                          \
   57 do {                                                                    \
   58         uint64_t *_stat_ = (r);                                         \
   59         _stat_[x]--;                                                    \
   60 } while (/*CONSTCOND*/0)
   61 
   62 #define _NET_STATDEC(stat, x)                                           \
   63 do {                                                                    \
   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)                                       \
   70 do {                                                                    \
   71         uint64_t *_stat_ = (r);                                         \
   72         _stat_[x] += (v);                                               \
   73 } while (/*CONSTCOND*/0)
   74 
   75 #define _NET_STATADD(stat, x, v)                                        \
   76 do {                                                                    \
   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)                                       \
   83 do {                                                                    \
   84         uint64_t *_stat_ = (r);                                         \
   85         _stat_[x] -= (v);                                               \
   86 } while (/*CONSTCOND*/0)
   87 
   88 #define _NET_STATSUB(stat, x, v)                                        \
   89 do {                                                                    \
   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
   96 struct lwp;
   97 struct sysctlnode;
   98 
   99 int     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_ */

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FreeBSD/Linux Kernel Cross Reference sys/net/net_stats.h

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sys/net/net_stats.h