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Annotation of XNU/bsd/nfs/nfsrtt.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            23: /*
        !            24:  * Copyright (c) 1992, 1993
        !            25:  *     The Regents of the University of California.  All rights reserved.
        !            26:  *
        !            27:  * This code is derived from software contributed to Berkeley by
        !            28:  * Rick Macklem at The University of Guelph.
        !            29:  *
        !            30:  * Redistribution and use in source and binary forms, with or without
        !            31:  * modification, are permitted provided that the following conditions
        !            32:  * are met:
        !            33:  * 1. Redistributions of source code must retain the above copyright
        !            34:  *    notice, this list of conditions and the following disclaimer.
        !            35:  * 2. Redistributions in binary form must reproduce the above copyright
        !            36:  *    notice, this list of conditions and the following disclaimer in the
        !            37:  *    documentation and/or other materials provided with the distribution.
        !            38:  * 3. All advertising materials mentioning features or use of this software
        !            39:  *    must display the following acknowledgement:
        !            40:  *     This product includes software developed by the University of
        !            41:  *     California, Berkeley and its contributors.
        !            42:  * 4. Neither the name of the University nor the names of its contributors
        !            43:  *    may be used to endorse or promote products derived from this software
        !            44:  *    without specific prior written permission.
        !            45:  *
        !            46:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            47:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            48:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            49:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            50:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            51:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            52:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            53:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            54:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            55:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            56:  * SUCH DAMAGE.
        !            57:  *
        !            58:  *     @(#)nfsrtt.h    8.2 (Berkeley) 3/30/95
        !            59:  * FreeBSD-Id: nfsrtt.h,v 1.8 1997/06/03 17:22:47 dfr Exp $
        !            60:  */
        !            61: 
        !            62: 
        !            63: #ifndef _NFS_NFSRTT_H_
        !            64: #define _NFS_NFSRTT_H_
        !            65: 
        !            66: /*
        !            67:  * Definitions for performance monitor.
        !            68:  * The client and server logging are turned on by setting the global
        !            69:  * constant "nfsrtton" to 1.
        !            70:  */
        !            71: #define        NFSRTTLOGSIZ    128
        !            72: 
        !            73: /*
        !            74:  * Circular log of client side rpc activity. Each log entry is for one
        !            75:  * rpc filled in upon completion. (ie. in order of completion)
        !            76:  * The "pos" is the table index for the "next" entry, therefore the
        !            77:  * list goes from nfsrtt.rttl[pos] --> nfsrtt.rttl[pos - 1] in
        !            78:  * chronological order of completion.
        !            79:  */
        !            80: struct nfsrtt {
        !            81:        int pos;                        /* Position in array for next entry */
        !            82:        struct rttl {
        !            83:                u_int32_t proc;         /* NFS procedure number */
        !            84:                int     rtt;            /* Measured round trip time */
        !            85:                int     rto;            /* Round Trip Timeout */
        !            86:                int     sent;           /* # rpcs in progress */
        !            87:                int     cwnd;           /* Send window */
        !            88:                int     srtt;           /* Ave Round Trip Time */
        !            89:                int     sdrtt;          /* Ave mean deviation of RTT */
        !            90:                fsid_t  fsid;           /* Fsid for mount point */
        !            91:                struct timeval tstamp;  /* Timestamp of log entry */
        !            92:        } rttl[NFSRTTLOGSIZ];
        !            93: };
        !            94: 
        !            95: /*
        !            96:  * And definitions for server side performance monitor.
        !            97:  * The log organization is the same as above except it is filled in at the
        !            98:  * time the server sends the rpc reply.
        !            99:  */
        !           100: 
        !           101: /*
        !           102:  * Bits for the flags field.
        !           103:  */
        !           104: #define        DRT_NQNFS       0x01    /* Rpc used Nqnfs protocol */
        !           105: #define        DRT_TCP         0x02    /* Client used TCP transport */
        !           106: #define        DRT_CACHEREPLY  0x04    /* Reply was from recent request cache */
        !           107: #define        DRT_CACHEDROP   0x08    /* Rpc request dropped, due to recent reply */
        !           108: #define DRT_NFSV3      0x10    /* Rpc used NFS Version 3 */
        !           109: 
        !           110: /*
        !           111:  * Server log structure
        !           112:  * NB: ipadr == INADDR_ANY indicates a client using a non IP protocol.
        !           113:  *     (ISO perhaps?)
        !           114:  */
        !           115: struct nfsdrt {
        !           116:        int pos;                        /* Position of next log entry */
        !           117:        struct drt {
        !           118:                int     flag;           /* Bits as defined above */
        !           119:                u_int32_t proc;         /* NFS procedure number */
        !           120:                u_long  ipadr;          /* IP address of client */
        !           121:                int     resptime;       /* Response time (usec) */
        !           122:                struct timeval tstamp;  /* Timestamp of log entry */
        !           123:        } drt[NFSRTTLOGSIZ];
        !           124: };
        !           125: 
        !           126: #endif

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