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Annotation of kernel/bsd/nfs/nfsdiskless.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            26: /*
        !            27:  * Copyright (c) 1991, 1993
        !            28:  *     The Regents of the University of California.  All rights reserved.
        !            29:  *
        !            30:  * This code is derived from software contributed to Berkeley by
        !            31:  * Rick Macklem at The University of Guelph.
        !            32:  *
        !            33:  * Redistribution and use in source and binary forms, with or without
        !            34:  * modification, are permitted provided that the following conditions
        !            35:  * are met:
        !            36:  * 1. Redistributions of source code must retain the above copyright
        !            37:  *    notice, this list of conditions and the following disclaimer.
        !            38:  * 2. Redistributions in binary form must reproduce the above copyright
        !            39:  *    notice, this list of conditions and the following disclaimer in the
        !            40:  *    documentation and/or other materials provided with the distribution.
        !            41:  * 3. All advertising materials mentioning features or use of this software
        !            42:  *    must display the following acknowledgement:
        !            43:  *     This product includes software developed by the University of
        !            44:  *     California, Berkeley and its contributors.
        !            45:  * 4. Neither the name of the University nor the names of its contributors
        !            46:  *    may be used to endorse or promote products derived from this software
        !            47:  *    without specific prior written permission.
        !            48:  *
        !            49:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            50:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            51:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            52:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            53:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            54:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            55:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            56:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            57:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            58:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            59:  * SUCH DAMAGE.
        !            60:  *
        !            61:  *     @(#)nfsdiskless.h       8.2 (Berkeley) 3/30/95
        !            62:  * FreeBSD-Id: nfsdiskless.h,v 1.10 1997/09/07 12:56:46 bde Exp $
        !            63:  */
        !            64: 
        !            65: 
        !            66: #ifndef _NFS_NFSDISKLESS_H_
        !            67: #define _NFS_NFSDISKLESS_H_
        !            68: 
        !            69: /*
        !            70:  * Structure that must be initialized for a diskless nfs client.
        !            71:  * This structure is used by nfs_mountroot() to set up the root and swap
        !            72:  * vnodes plus do a partial ifconfig(8) and route(8) so that the critical net
        !            73:  * interface can communicate with the server.
        !            74:  * The primary bootstrap is expected to fill in the appropriate fields before
        !            75:  * starting the kernel. Whether or not the swap area is nfs mounted is
        !            76:  * determined by the value in swdevt[0]. (equal to NODEV --> swap over nfs)
        !            77:  * Currently only works for AF_INET protocols.
        !            78:  * NB: All fields are stored in net byte order to avoid hassles with
        !            79:  * client/server byte ordering differences.
        !            80:  */
        !            81: 
        !            82: /*
        !            83:  * I have defined a new structure that can handle an NFS Version 3 file handle
        !            84:  * but the kernel still expects the old Version 2 one to be provided. The
        !            85:  * changes required in nfs_vfsops.c for using the new are documented there in
        !            86:  * comments. (I felt that breaking network booting code by changing this
        !            87:  * structure would not be prudent at this time, since almost all servers are
        !            88:  * still Version 2 anyhow.)
        !            89:  */
        !            90: struct nfsv3_diskless {
        !            91:        struct ifaliasreq myif;                 /* Default interface */
        !            92:        struct sockaddr_in mygateway;           /* Default gateway */
        !            93:        struct nfs_args swap_args;              /* Mount args for swap file */
        !            94:        int             swap_fhsize;            /* Size of file handle */
        !            95:        u_char          swap_fh[NFSX_V3FHMAX];  /* Swap file's file handle */
        !            96:        struct sockaddr_in swap_saddr;          /* Address of swap server */
        !            97:        char            swap_hostnam[MNAMELEN]; /* Host name for mount pt */
        !            98:        int             swap_nblks;             /* Size of server swap file */
        !            99:        struct ucred    swap_ucred;             /* Swap credentials */
        !           100:        struct nfs_args root_args;              /* Mount args for root fs */
        !           101:        int             root_fhsize;            /* Size of root file handle */
        !           102:        u_char          root_fh[NFSX_V3FHMAX];  /* File handle of root dir */
        !           103:        struct sockaddr_in root_saddr;          /* Address of root server */
        !           104:        char            root_hostnam[MNAMELEN]; /* Host name for mount pt */
        !           105:        long            root_time;              /* Timestamp of root fs */
        !           106:        char            my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
        !           107: };
        !           108: 
        !           109: struct nfs_dlmount {
        !           110:        struct sockaddr_in ndm_saddr;           /* Address of file server */
        !           111:        char            ndm_host[MNAMELEN];     /* Host name for mount pt */
        !           112:        u_char          ndm_fh[NFSX_V2FH];              /* The file's file handle */
        !           113: };
        !           114: 
        !           115: /*
        !           116:  * Old arguments to mount NFS
        !           117:  */
        !           118: struct onfs_args {
        !           119:        struct sockaddr *addr;          /* file server address */
        !           120:        int             addrlen;        /* length of address */
        !           121:        int             sotype;         /* Socket type */
        !           122:        int             proto;          /* and Protocol */
        !           123:        u_char          *fh;            /* File handle to be mounted */
        !           124:        int             fhsize;         /* Size, in bytes, of fh */
        !           125:        int             flags;          /* flags */
        !           126:        int             wsize;          /* write size in bytes */
        !           127:        int             rsize;          /* read size in bytes */
        !           128:        int             readdirsize;    /* readdir size in bytes */
        !           129:        int             timeo;          /* initial timeout in .1 secs */
        !           130:        int             retrans;        /* times to retry send */
        !           131:        int             maxgrouplist;   /* Max. size of group list */
        !           132:        int             readahead;      /* # of blocks to readahead */
        !           133:        int             leaseterm;      /* Term (sec) of lease */
        !           134:        int             deadthresh;     /* Retrans threshold */
        !           135:        char            *hostname;      /* server's name */
        !           136: };
        !           137: 
        !           138: struct nfs_diskless {
        !           139:        struct nfs_dlmount nd_root;     /* Mount info for root */
        !           140:        struct nfs_dlmount nd_private;  /* Mount info for private */
        !           141: };
        !           142: 
        !           143: #endif

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