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Annotation of sys/nfs/nfsrtt.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: nfsrtt.h,v 1.6 2003/06/02 23:28:20 millert Exp $      */
        !             2: /*     $NetBSD: nfsrtt.h,v 1.4 1996/02/18 11:54:07 fvdl Exp $  */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1992, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to Berkeley by
        !             9:  * Rick Macklem at The University of Guelph.
        !            10:  *
        !            11:  * Redistribution and use in source and binary forms, with or without
        !            12:  * modification, are permitted provided that the following conditions
        !            13:  * are met:
        !            14:  * 1. Redistributions of source code must retain the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer.
        !            16:  * 2. Redistributions in binary form must reproduce the above copyright
        !            17:  *    notice, this list of conditions and the following disclaimer in the
        !            18:  *    documentation and/or other materials provided with the distribution.
        !            19:  * 3. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  *
        !            35:  *     @(#)nfsrtt.h    8.2 (Berkeley) 3/30/95
        !            36:  */
        !            37:
        !            38:
        !            39: #ifndef _NFS_NFSRTT_H_
        !            40: #define _NFS_NFSRTT_H_
        !            41:
        !            42: /*
        !            43:  * Definitions for performance monitor.
        !            44:  * The client and server logging are turned on by setting the global
        !            45:  * constant "nfsrtton" to 1.
        !            46:  */
        !            47: #define        NFSRTTLOGSIZ    128
        !            48:
        !            49: /*
        !            50:  * Circular log of client side rpc activity. Each log entry is for one
        !            51:  * rpc filled in upon completion. (ie. in order of completion)
        !            52:  * The "pos" is the table index for the "next" entry, therefore the
        !            53:  * list goes from nfsrtt.rttl[pos] --> nfsrtt.rttl[pos - 1] in
        !            54:  * chronological order of completion.
        !            55:  */
        !            56: struct nfsrtt {
        !            57:        int pos;                        /* Position in array for next entry */
        !            58:        struct rttl {
        !            59:                int     proc;           /* NFS procedure number */
        !            60:                int     rtt;            /* Measured round trip time */
        !            61:                int     rto;            /* Round Trip Timeout */
        !            62:                int     sent;           /* # rpcs in progress */
        !            63:                int     cwnd;           /* Send window */
        !            64:                int     srtt;           /* Ave Round Trip Time */
        !            65:                int     sdrtt;          /* Ave mean deviation of RTT */
        !            66:                fsid_t  fsid;           /* Fsid for mount point */
        !            67:                struct timeval tstamp;  /* Timestamp of log entry */
        !            68:        } rttl[NFSRTTLOGSIZ];
        !            69: };
        !            70:
        !            71: /*
        !            72:  * And definitions for server side performance monitor.
        !            73:  * The log organization is the same as above except it is filled in at the
        !            74:  * time the server sends the rpc reply.
        !            75:  */
        !            76:
        !            77: /*
        !            78:  * Bits for the flags field.
        !            79:  */
        !            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:                int       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