The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfsrtt.h

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    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. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by the University of
   19  *      California, Berkeley and its contributors.
   20  * 4. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      @(#)nfsrtt.h    8.2 (Berkeley) 3/30/95
   37  * $FreeBSD$
   38  */
   39 
   40 
   41 #ifndef _NFS_NFSRTT_H_
   42 #define _NFS_NFSRTT_H_
   43 
   44 /*
   45  * Definitions for performance monitor.
   46  * The client and server logging are turned on by setting the global
   47  * constant "nfsrtton" to 1.
   48  */
   49 #define NFSRTTLOGSIZ    128
   50 
   51 /*
   52  * Circular log of client side rpc activity. Each log entry is for one
   53  * rpc filled in upon completion. (ie. in order of completion)
   54  * The "pos" is the table index for the "next" entry, therefore the
   55  * list goes from nfsrtt.rttl[pos] --> nfsrtt.rttl[pos - 1] in
   56  * chronological order of completion.
   57  */
   58 struct nfsrtt {
   59         int pos;                        /* Position in array for next entry */
   60         struct rttl {
   61                 u_int32_t proc;         /* NFS procedure number */
   62                 int     rtt;            /* Measured round trip time */
   63                 int     rto;            /* Round Trip Timeout */
   64                 int     sent;           /* # rpcs in progress */
   65                 int     cwnd;           /* Send window */
   66                 int     srtt;           /* Ave Round Trip Time */
   67                 int     sdrtt;          /* Ave mean deviation of RTT */
   68                 fsid_t  fsid;           /* Fsid for mount point */
   69                 struct timeval tstamp;  /* Timestamp of log entry */
   70         } rttl[NFSRTTLOGSIZ];
   71 };
   72 
   73 /*
   74  * And definitions for server side performance monitor.
   75  * The log organization is the same as above except it is filled in at the
   76  * time the server sends the rpc reply.
   77  */
   78 
   79 /*
   80  * Bits for the flags field.
   81  */
   82 #define DRT_NQNFS       0x01    /* Rpc used Nqnfs protocol */
   83 #define DRT_TCP         0x02    /* Client used TCP transport */
   84 #define DRT_CACHEREPLY  0x04    /* Reply was from recent request cache */
   85 #define DRT_CACHEDROP   0x08    /* Rpc request dropped, due to recent reply */
   86 #define DRT_NFSV3       0x10    /* Rpc used NFS Version 3 */
   87 
   88 /*
   89  * Server log structure
   90  * NB: ipadr == INADDR_ANY indicates a client using a non IP protocol.
   91  *      (ISO perhaps?)
   92  */
   93 struct nfsdrt {
   94         int pos;                        /* Position of next log entry */
   95         struct drt {
   96                 int     flag;           /* Bits as defined above */
   97                 u_int32_t proc;         /* NFS procedure number */
   98                 u_int32_t ipadr;        /* IP address of client */
   99                 int     resptime;       /* Response time (usec) */
  100                 struct timeval tstamp;  /* Timestamp of log entry */
  101         } drt[NFSRTTLOGSIZ];
  102 };
  103 
  104 #endif

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