sys/vfs/nfs/nfsrtt.h

   1 /*
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)nfsrtt.h    8.2 (Berkeley) 3/30/95
  33  * $FreeBSD: src/sys/nfs/nfsrtt.h,v 1.10 1999/08/28 00:50:03 peter Exp $
  34  * $DragonFly: src/sys/vfs/nfs/nfsrtt.h,v 1.2 2003/06/17 04:28:54 dillon Exp $
  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 nfsrtt {
  56         int pos;                        /* Position in array for next entry */
  57         struct rttl {
  58                 u_int32_t proc;         /* NFS procedure number */
  59                 int     rtt;            /* Measured round trip time */
  60                 int     rto;            /* Round Trip Timeout */
  61                 int     sent;           /* # rpcs in progress */
  62                 int     cwnd;           /* Send window */
  63                 int     srtt;           /* Ave Round Trip Time */
  64                 int     sdrtt;          /* Ave mean deviation of RTT */
  65                 fsid_t  fsid;           /* Fsid for mount point */
  66                 struct timeval tstamp;  /* Timestamp of log entry */
  67         } rttl[NFSRTTLOGSIZ];
  68 };
  69
  70 /*
  71  * And definitions for server side performance monitor.
  72  * The log organization is the same as above except it is filled in at the
  73  * time the server sends the rpc reply.
  74  */
  75
  76 /*
  77  * Bits for the flags field.
  78  */
  79 #define DRT_NQNFS       0x01    /* Rpc used Nqnfs protocol */
  80 #define DRT_TCP         0x02    /* Client used TCP transport */
  81 #define DRT_CACHEREPLY  0x04    /* Reply was from recent request cache */
  82 #define DRT_CACHEDROP   0x08    /* Rpc request dropped, due to recent reply */
  83 #define DRT_NFSV3       0x10    /* Rpc used NFS Version 3 */
  84
  85 /*
  86  * Server log structure
  87  * NB: ipadr == INADDR_ANY indicates a client using a non IP protocol.
  88  *      (ISO perhaps?)
  89  */
  90 struct nfsdrt {
  91         int pos;                        /* Position of next log entry */
  92         struct drt {
  93                 int     flag;           /* Bits as defined above */
  94                 u_int32_t proc;         /* NFS procedure number */
  95                 u_int32_t ipadr;        /* IP address of client */
  96                 int     resptime;       /* Response time (usec) */
  97                 struct timeval tstamp;  /* Timestamp of log entry */
  98         } drt[NFSRTTLOGSIZ];
  99 };
 100
 101 #endif