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      1 /*	$NetBSD: nfsrtt.h,v 1.11 2024/12/07 02:05:55 riastradh 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 #ifndef _NFS_NFSRTT_H_
     38 #define	_NFS_NFSRTT_H_
     39 
     40 #include <sys/types.h>
     41 
     42 #include <sys/fstypes.h>
     43 #include <sys/time.h>
     44 
     45 /*
     46  * Definitions for performance monitor.
     47  * The client and server logging are turned on by setting the global
     48  * constant "nfsrtton" to 1.
     49  */
     50 #define	NFSRTTLOGSIZ	128
     51 
     52 /*
     53  * Circular log of client side rpc activity. Each log entry is for one
     54  * rpc filled in upon completion. (ie. in order of completion)
     55  * The "pos" is the table index for the "next" entry, therefore the
     56  * list goes from nfsrtt.rttl[pos] --> nfsrtt.rttl[pos - 1] in
     57  * chronological order of completion.
     58  */
     59 struct rttl {
     60 	u_int32_t	proc;			/* NFS procedure number */
     61 	int		rtt;			/* Measured round trip time */
     62 	int		rto;			/* Round Trip Timeout */
     63 	int		sent;			/* # rpcs in progress */
     64 	int		cwnd;			/* Send window */
     65 	int		srtt;			/* Ave Round Trip Time */
     66 	int		sdrtt;			/* Ave mean deviation of RTT */
     67 	fsid_t		fsid;			/* Fsid for mount point */
     68 	struct timeval	tstamp;			/* Timestamp of log entry */
     69 };
     70 
     71 struct nfsrtt {
     72 	int pos;			/* Position in array for next entry */
     73 	struct rttl rttl[NFSRTTLOGSIZ];
     74 };
     75 
     76 /*
     77  * And definitions for server side performance monitor.
     78  * The log organization is the same as above except it is filled in at the
     79  * time the server sends the rpc reply.
     80  */
     81 
     82 /*
     83  * Bits for the flags field.
     84  */
     85 #define	DRT_TCP		0x02	/* Client used TCP transport */
     86 #define	DRT_CACHEREPLY	0x04	/* Reply was from recent request cache */
     87 #define	DRT_CACHEDROP	0x08	/* Rpc request dropped, due to recent reply */
     88 #define DRT_NFSV3	0x10	/* Rpc used NFS Version 3 */
     89 
     90 /*
     91  * Server log structure
     92  * NB: ipadr == INADDR_ANY indicates a client using a non IP protocol.
     93  *	(ISO perhaps?)
     94  */
     95 struct nfsdrt {
     96 	int pos;			/* Position of next log entry */
     97 	struct drt {
     98 		int       flag;		/* Bits as defined above */
     99 		u_int32_t proc;		/* NFS procedure number */
    100 		u_int32_t ipadr;	/* IP address of client */
    101 		int       resptime;	/* Response time (usec) */
    102 		struct timeval tstamp;	/* Timestamp of log entry */
    103 	} drt[NFSRTTLOGSIZ];
    104 };
    105 
    106 #ifdef _KERNEL
    107 extern int nfsrtton;
    108 #endif
    109 
    110 #endif	/* _NFS_NFSRTT_H_ */
    111