Home | History | Annotate | Line # | Download | only in nfs
nfsrtt.h revision 1.9.90.1 
      1 /*	$NetBSD: nfsrtt.h,v 1.9.90.1 2017/12/03 11:39:06 jdolecek 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  */
     55 struct 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 
     67 struct 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  */
     91 struct 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
    103 extern int nfsrtton;
    104 #endif
    105 
    106 #endif
    107