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net_stats.h revision 1.2 
      1 /*	$NetBSD: net_stats.h,v 1.2 2008/04/28 20:24:09 martin Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 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 #define	_NET_STAT_GETREF(stat)	percpu_getref((stat))
     39 #define	_NET_STAT_PUTREF(stat)	percpu_putref((stat))
     40 
     41 #define	_NET_STATINC(stat, x)						\
     42 do {									\
     43 	uint64_t *_stat_ = _NET_STAT_GETREF(stat);			\
     44 	_stat_[x]++;							\
     45 	_NET_STAT_PUTREF(stat);						\
     46 } while (/*CONSTCOND*/0)
     47 
     48 #define	_NET_STATDEC(stat, x)						\
     49 do {									\
     50 	uint64_t *_stat_ = _NET_STAT_GETREF(stat);			\
     51 	_stat_[x]--;							\
     52 	_NET_STAT_PUTREF(stat);						\
     53 } while (/*CONSTCOND*/0)
     54 
     55 #define	_NET_STATADD(stat, x, v)					\
     56 do {									\
     57 	uint64_t *_stat_ = _NET_STAT_GETREF(stat);			\
     58 	_stat_[x] += (v);						\
     59 	_NET_STAT_PUTREF(stat);						\
     60 } while (/*CONSTCOND*/0)
     61 
     62 #define	_NET_STATSUB(stat, x, v)					\
     63 do {									\
     64 	uint64_t *_stat_ = _NET_STAT_GETREF(stat);			\
     65 	_stat_[x] -= (v);						\
     66 	_NET_STAT_PUTREF(stat);						\
     67 } while (/*CONSTCOND*/0)
     68 
     69 /*
     70  * netstat_sysctl_context --
     71  *	Context passed to netstat_sysctl().
     72  */
     73 typedef struct {
     74 	percpu_t	*ctx_stat;	/* stat's percpu context */
     75 	uint64_t	*ctx_counters;	/* pointer to collated counter array */
     76 	u_int		 ctx_ncounters;	/* number of counters in array */
     77 } netstat_sysctl_context;
     78 
     79 __BEGIN_DECLS
     80 struct lwp;
     81 struct sysctlnode;
     82 
     83 int	netstat_sysctl(netstat_sysctl_context *,
     84 		       const int *, u_int, void *,
     85 		       size_t *, const void *, size_t,
     86 		       const int *, struct lwp *, const struct sysctlnode *);
     87 
     88 #define	NETSTAT_SYSCTL(ctx)						\
     89 	netstat_sysctl((ctx), name, namelen, oldp, oldlenp,		\
     90 		       newp, newlen, oname, l, rnode)
     91 __END_DECLS
     92 #endif /* _KERNEL */
     93 
     94 #endif /* !_NET_NET_STATS_H_ */
     95