sys/vfs/nfs/nfsdiskless.h

   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: src/sys/nfs/nfsdiskless.h,v 1.11 1999/08/28 00:50:02 peter Exp $
  38  * $DragonFly: src/sys/vfs/nfs/nfsdiskless.h,v 1.4 2007/05/08 02:31:43 dillon Exp $
  39  */
  40
  41
  42 #ifndef _NFS_NFSDISKLESS_H_
  43 #define _NFS_NFSDISKLESS_H_
  44
  45 /*
  46  * Structure that must be initialized for a diskless nfs client.
  47  * This structure is used by nfs_mountroot() to set up the root vnode,
  48  * and to do a partial ifconfig(8) and route(8) so that the critical net
  49  * interface can communicate with the server.
  50  * The primary bootstrap is expected to fill in the appropriate fields before
  51  * starting the kernel. Whether or not the swap area is nfs mounted is
  52  * determined by the value in swdevt[0]. (equal to NULL --> swap over nfs)
  53  * Currently only works for AF_INET protocols.
  54  * NB: All fields are stored in net byte order to avoid hassles with
  55  * client/server byte ordering differences.
  56  */
  57
  58 /*
  59  * I have defined a new structure that can handle an NFS Version 3 file handle
  60  * but the kernel still expects the old Version 2 one to be provided. The
  61  * changes required in nfs_vfsops.c for using the new are documented there in
  62  * comments. (I felt that breaking network booting code by changing this
  63  * structure would not be prudent at this time, since almost all servers are
  64  * still Version 2 anyhow.)
  65  */
  66 struct nfsv3_diskless {
  67         struct ifaliasreq myif;                 /* Default interface */
  68         struct sockaddr_in mygateway;           /* Default gateway */
  69         struct nfs_args swap_args;              /* Mount args for swap file */
  70         int             swap_fhsize;            /* Size of file handle */
  71         u_char          swap_fh[NFSX_V3FHMAX];  /* Swap file's file handle */
  72         struct sockaddr_in swap_saddr;          /* Address of swap server */
  73         char            swap_hostnam[MNAMELEN]; /* Host name for mount pt */
  74         int             swap_nblks;             /* Size of server swap file */
  75         struct ucred    swap_ucred;             /* Swap credentials */
  76         struct nfs_args root_args;              /* Mount args for root fs */
  77         int             root_fhsize;            /* Size of root file handle */
  78         u_char          root_fh[NFSX_V3FHMAX];  /* File handle of root dir */
  79         struct sockaddr_in root_saddr;          /* Address of root server */
  80         char            root_hostnam[MNAMELEN]; /* Host name for mount pt */
  81         long            root_time;              /* Timestamp of root fs */
  82         char            my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
  83 };
  84
  85 /*
  86  * Old arguments to mount NFS
  87  */
  88 struct onfs_args {
  89         struct sockaddr *addr;          /* file server address */
  90         int             addrlen;        /* length of address */
  91         int             sotype;         /* Socket type */
  92         int             proto;          /* and Protocol */
  93         u_char          *fh;            /* File handle to be mounted */
  94         int             fhsize;         /* Size, in bytes, of fh */
  95         int             flags;          /* flags */
  96         int             wsize;          /* write size in bytes */
  97         int             rsize;          /* read size in bytes */
  98         int             readdirsize;    /* readdir size in bytes */
  99         int             timeo;          /* initial timeout in .1 secs */
 100         int             retrans;        /* times to retry send */
 101         int             maxgrouplist;   /* Max. size of group list */
 102         int             readahead;      /* # of blocks to readahead */
 103         int             leaseterm;      /* Term (sec) of lease */
 104         int             deadthresh;     /* Retrans threshold */
 105         char            *hostname;      /* server's name */
 106 };
 107
 108 struct nfs_diskless {
 109         struct ifaliasreq myif;                 /* Default interface */
 110         struct sockaddr_in mygateway;           /* Default gateway */
 111         struct onfs_args swap_args;             /* Mount args for swap file */
 112         u_char          swap_fh[NFSX_V2FH];     /* Swap file's file handle */
 113         struct sockaddr_in swap_saddr;          /* Address of swap server */
 114         char            swap_hostnam[MNAMELEN]; /* Host name for mount pt */
 115         int             swap_nblks;             /* Size of server swap file */
 116         struct ucred    swap_ucred;             /* Swap credentials */
 117         struct onfs_args root_args;             /* Mount args for root fs */
 118         u_char          root_fh[NFSX_V2FH];     /* File handle of root dir */
 119         struct sockaddr_in root_saddr;          /* Address of root server */
 120         char            root_hostnam[MNAMELEN]; /* Host name for mount pt */
 121         long            root_time;              /* Timestamp of root fs */
 122         char            my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
 123 };
 124
 125 #endif