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/nfsclient/nfsdiskless.h

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    1 /*-
    2  * Copyright (c) 1991, 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  * 4. 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  *      @(#)nfsdiskless.h       8.2 (Berkeley) 3/30/95
   33  * $FreeBSD: src/sys/nfsclient/nfsdiskless.h,v 1.16.2.1 2005/01/31 23:26:46 imp Exp $
   34  */
   35 
   36 #ifndef _NFSCLIENT_NFSDISKLESS_H_
   37 #define _NFSCLIENT_NFSDISKLESS_H_
   38 
   39 /*
   40  * Structure that must be initialized for a diskless nfs client.
   41  * This structure is used by nfs_mountroot() to set up the root vnode,
   42  * and to do a partial ifconfig(8) and route(8) so that the critical net
   43  * interface can communicate with the server.
   44  * The primary bootstrap is expected to fill in the appropriate fields before
   45  * starting the kernel.
   46  * Currently only works for AF_INET protocols.
   47  * NB: All fields are stored in net byte order to avoid hassles with
   48  * client/server byte ordering differences.
   49  */
   50 
   51 /*
   52  * I have defined a new structure that can handle an NFS Version 3 file handle
   53  * but the kernel still expects the old Version 2 one to be provided. The
   54  * changes required in nfs_vfsops.c for using the new are documented there in
   55  * comments. (I felt that breaking network booting code by changing this
   56  * structure would not be prudent at this time, since almost all servers are
   57  * still Version 2 anyhow.)
   58  */
   59 struct nfsv3_diskless {
   60         struct ifaliasreq myif;                 /* Default interface */
   61         struct sockaddr_in mygateway;           /* Default gateway */
   62         struct nfs_args root_args;              /* Mount args for root fs */
   63         int             root_fhsize;            /* Size of root file handle */
   64         u_char          root_fh[NFSX_V3FHMAX];  /* File handle of root dir */
   65         struct sockaddr_in root_saddr;          /* Address of root server */
   66         char            root_hostnam[MNAMELEN]; /* Host name for mount pt */
   67         long            root_time;              /* Timestamp of root fs */
   68         char            my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
   69 };
   70 
   71 /*
   72  * Old arguments to mount NFS
   73  */
   74 struct onfs_args {
   75         struct sockaddr *addr;          /* file server address */
   76         int             addrlen;        /* length of address */
   77         int             sotype;         /* Socket type */
   78         int             proto;          /* and Protocol */
   79         u_char          *fh;            /* File handle to be mounted */
   80         int             fhsize;         /* Size, in bytes, of fh */
   81         int             flags;          /* flags */
   82         int             wsize;          /* write size in bytes */
   83         int             rsize;          /* read size in bytes */
   84         int             readdirsize;    /* readdir size in bytes */
   85         int             timeo;          /* initial timeout in .1 secs */
   86         int             retrans;        /* times to retry send */
   87         int             maxgrouplist;   /* Max. size of group list */
   88         int             readahead;      /* # of blocks to readahead */
   89         int             leaseterm;      /* Term (sec) of lease */
   90         int             deadthresh;     /* Retrans threshold */
   91         char            *hostname;      /* server's name */
   92 };
   93 
   94 struct nfs_diskless {
   95         struct ifaliasreq myif;                 /* Default interface */
   96         struct sockaddr_in mygateway;           /* Default gateway */
   97         struct onfs_args root_args;             /* Mount args for root fs */
   98         u_char          root_fh[NFSX_V2FH];     /* File handle of root dir */
   99         struct sockaddr_in root_saddr;          /* Address of root server */
  100         char            root_hostnam[MNAMELEN]; /* Host name for mount pt */
  101         long            root_time;              /* Timestamp of root fs */
  102         char            my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
  103 };
  104 
  105 #ifdef _KERNEL
  106 extern struct nfsv3_diskless nfsv3_diskless;
  107 extern struct nfs_diskless nfs_diskless;
  108 extern int      nfs_diskless_valid;
  109 void bootpc_init(void);
  110 void nfs_setup_diskless(void);
  111 #endif
  112 
  113 #endif

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