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  * 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  *      @(#)nfsdiskless.h       8.2 (Berkeley) 3/30/95
   37  * $FreeBSD: releng/5.0/sys/nfsclient/nfsdiskless.h 103770 2002-09-22 00:59:02Z jake $
   38  */
   39 
   40 #ifndef _NFSCLIENT_NFSDISKLESS_H_
   41 #define _NFSCLIENT_NFSDISKLESS_H_
   42 
   43 /*
   44  * Structure that must be initialized for a diskless nfs client.
   45  * This structure is used by nfs_mountroot() to set up the root vnode,
   46  * and to do a partial ifconfig(8) and route(8) so that the critical net
   47  * interface can communicate with the server.
   48  * The primary bootstrap is expected to fill in the appropriate fields before
   49  * starting the kernel. Whether or not the swap area is nfs mounted is
   50  * determined by the value in swdevt[0]. (equal to NODEV --> swap over nfs)
   51  * Currently only works for AF_INET protocols.
   52  * NB: All fields are stored in net byte order to avoid hassles with
   53  * client/server byte ordering differences.
   54  */
   55 
   56 /*
   57  * I have defined a new structure that can handle an NFS Version 3 file handle
   58  * but the kernel still expects the old Version 2 one to be provided. The
   59  * changes required in nfs_vfsops.c for using the new are documented there in
   60  * comments. (I felt that breaking network booting code by changing this
   61  * structure would not be prudent at this time, since almost all servers are
   62  * still Version 2 anyhow.)
   63  */
   64 struct nfsv3_diskless {
   65         struct ifaliasreq myif;                 /* Default interface */
   66         struct sockaddr_in mygateway;           /* Default gateway */
   67         struct nfs_args swap_args;              /* Mount args for swap file */
   68         int             swap_fhsize;            /* Size of file handle */
   69         u_char          swap_fh[NFSX_V3FHMAX];  /* Swap file's file handle */
   70         struct sockaddr_in swap_saddr;          /* Address of swap server */
   71         char            swap_hostnam[MNAMELEN]; /* Host name for mount pt */
   72         int             swap_nblks;             /* Size of server swap file */
   73         struct ucred    swap_ucred;             /* Swap credentials */
   74         struct nfs_args root_args;              /* Mount args for root fs */
   75         int             root_fhsize;            /* Size of root file handle */
   76         u_char          root_fh[NFSX_V3FHMAX];  /* File handle of root dir */
   77         struct sockaddr_in root_saddr;          /* Address of root server */
   78         char            root_hostnam[MNAMELEN]; /* Host name for mount pt */
   79         long            root_time;              /* Timestamp of root fs */
   80         char            my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
   81 };
   82 
   83 /*
   84  * Old arguments to mount NFS
   85  */
   86 struct onfs_args {
   87         struct sockaddr *addr;          /* file server address */
   88         int             addrlen;        /* length of address */
   89         int             sotype;         /* Socket type */
   90         int             proto;          /* and Protocol */
   91         u_char          *fh;            /* File handle to be mounted */
   92         int             fhsize;         /* Size, in bytes, of fh */
   93         int             flags;          /* flags */
   94         int             wsize;          /* write size in bytes */
   95         int             rsize;          /* read size in bytes */
   96         int             readdirsize;    /* readdir size in bytes */
   97         int             timeo;          /* initial timeout in .1 secs */
   98         int             retrans;        /* times to retry send */
   99         int             maxgrouplist;   /* Max. size of group list */
  100         int             readahead;      /* # of blocks to readahead */
  101         int             leaseterm;      /* Term (sec) of lease */
  102         int             deadthresh;     /* Retrans threshold */
  103         char            *hostname;      /* server's name */
  104 };
  105 
  106 struct nfs_diskless {
  107         struct ifaliasreq myif;                 /* Default interface */
  108         struct sockaddr_in mygateway;           /* Default gateway */
  109         struct onfs_args swap_args;             /* Mount args for swap file */
  110         u_char          swap_fh[NFSX_V2FH];     /* Swap file's file handle */
  111         struct sockaddr_in swap_saddr;          /* Address of swap server */
  112         char            swap_hostnam[MNAMELEN]; /* Host name for mount pt */
  113         int             swap_nblks;             /* Size of server swap file */
  114         struct ucred    swap_ucred;             /* Swap credentials */
  115         struct onfs_args root_args;             /* Mount args for root fs */
  116         u_char          root_fh[NFSX_V2FH];     /* File handle of root dir */
  117         struct sockaddr_in root_saddr;          /* Address of root server */
  118         char            root_hostnam[MNAMELEN]; /* Host name for mount pt */
  119         long            root_time;              /* Timestamp of root fs */
  120         char            my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
  121 };
  122 
  123 #ifdef _KERNEL
  124 extern struct nfsv3_diskless nfsv3_diskless;
  125 extern struct nfs_diskless nfs_diskless;
  126 extern int      nfs_diskless_valid;
  127 void bootpc_init(void);
  128 void nfs_setup_diskless(void);
  129 #endif
  130 
  131 #endif

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