1/*	$NetBSD: nfsrtt.h,v 1.10 2014/09/05 05:34:41 matt Exp $	*/
  2
  3/*
  4 * Copyright (c) 1992, 1993
  5 *	The Regents of the University of California.  All rights reserved.
  6 *
  7 * This code is derived from software contributed to Berkeley by
  8 * Rick Macklem at The University of Guelph.
  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 * 3. Neither the name of the University nor the names of its contributors
 19 *    may be used to endorse or promote products derived from this software
 20 *    without specific prior written permission.
 21 *
 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 32 * SUCH DAMAGE.
 33 *
 34 *	@(#)nfsrtt.h	8.2 (Berkeley) 3/30/95
 35 */
 36
 37
 38#ifndef _NFS_NFSRTT_H_
 39#define _NFS_NFSRTT_H_
 40
 41/*
 42 * Definitions for performance monitor.
 43 * The client and server logging are turned on by setting the global
 44 * constant "nfsrtton" to 1.
 45 */
 46#define	NFSRTTLOGSIZ	128
 47
 48/*
 49 * Circular log of client side rpc activity. Each log entry is for one
 50 * rpc filled in upon completion. (ie. in order of completion)
 51 * The "pos" is the table index for the "next" entry, therefore the
 52 * list goes from nfsrtt.rttl[pos] --> nfsrtt.rttl[pos - 1] in
 53 * chronological order of completion.
 54 */
 55struct rttl {
 56	u_int32_t	proc;			/* NFS procedure number */
 57	int		rtt;			/* Measured round trip time */
 58	int		rto;			/* Round Trip Timeout */
 59	int		sent;			/* # rpcs in progress */
 60	int		cwnd;			/* Send window */
 61	int		srtt;			/* Ave Round Trip Time */
 62	int		sdrtt;			/* Ave mean deviation of RTT */
 63	fsid_t		fsid;			/* Fsid for mount point */
 64	struct timeval	tstamp;			/* Timestamp of log entry */
 65};
 66
 67struct nfsrtt {
 68	int pos;			/* Position in array for next entry */
 69	struct rttl rttl[NFSRTTLOGSIZ];
 70};
 71
 72/*
 73 * And definitions for server side performance monitor.
 74 * The log organization is the same as above except it is filled in at the
 75 * time the server sends the rpc reply.
 76 */
 77
 78/*
 79 * Bits for the flags field.
 80 */
 81#define	DRT_TCP		0x02	/* Client used TCP transport */
 82#define	DRT_CACHEREPLY	0x04	/* Reply was from recent request cache */
 83#define	DRT_CACHEDROP	0x08	/* Rpc request dropped, due to recent reply */
 84#define DRT_NFSV3	0x10	/* Rpc used NFS Version 3 */
 85
 86/*
 87 * Server log structure
 88 * NB: ipadr == INADDR_ANY indicates a client using a non IP protocol.
 89 *	(ISO perhaps?)
 90 */
 91struct nfsdrt {
 92	int pos;			/* Position of next log entry */
 93	struct drt {
 94		int       flag;		/* Bits as defined above */
 95		u_int32_t proc;		/* NFS procedure number */
 96		u_int32_t ipadr;	/* IP address of client */
 97		int       resptime;	/* Response time (usec) */
 98		struct timeval tstamp;	/* Timestamp of log entry */
 99	} drt[NFSRTTLOGSIZ];
100};
101
102#ifdef _KERNEL
103extern int nfsrtton;
104#endif
105
106#endif