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/nfs/nfsdiskless.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1991, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * This code is derived from software contributed to Berkeley by
    8  * Rick Macklem at The University of Guelph.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      @(#)nfsdiskless.h       8.2 (Berkeley) 3/30/95
   35  * $FreeBSD$
   36  */
   37 
   38 #ifndef _NFSCLIENT_NFSDISKLESS_H_
   39 #define _NFSCLIENT_NFSDISKLESS_H_
   40 
   41 /*
   42  * Structure that must be initialized for a diskless nfs client.
   43  * This structure is used by nfs_mountroot() to set up the root vnode,
   44  * and to do a partial ifconfig(8) and route(8) so that the critical net
   45  * interface can communicate with the server.
   46  * The primary bootstrap is expected to fill in the appropriate fields before
   47  * starting the kernel.
   48  * Currently only works for AF_INET protocols.
   49  * NB: All fields are stored in net byte order to avoid hassles with
   50  * client/server byte ordering differences.
   51  */
   52 
   53 /*
   54  * I have defined a new structure that can handle an NFS Version 3 file handle
   55  * but the kernel still expects the old Version 2 one to be provided. The
   56  * changes required in nfs_vfsops.c for using the new are documented there in
   57  * comments. (I felt that breaking network booting code by changing this
   58  * structure would not be prudent at this time, since almost all servers are
   59  * still Version 2 anyhow.)
   60  */
   61 struct nfsv3_diskless {
   62         struct ifaliasreq myif;                 /* Default interface */
   63         struct sockaddr_in mygateway;           /* Default gateway */
   64         struct nfs_args root_args;              /* Mount args for root fs */
   65         int             root_fhsize;            /* Size of root file handle */
   66         u_char          root_fh[NFSX_V3FHMAX];  /* File handle of root dir */
   67         struct sockaddr_in root_saddr;          /* Address of root server */
   68         char            root_hostnam[MNAMELEN]; /* Host name for mount pt */
   69         long            root_time;              /* Timestamp of root fs */
   70         char            my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
   71 };
   72 
   73 /*
   74  * Old arguments to mount NFS
   75  */
   76 struct onfs_args {
   77         struct sockaddr *addr;          /* file server address */
   78         int             addrlen;        /* length of address */
   79         int             sotype;         /* Socket type */
   80         int             proto;          /* and Protocol */
   81         u_char          *fh;            /* File handle to be mounted */
   82         int             fhsize;         /* Size, in bytes, of fh */
   83         int             flags;          /* flags */
   84         int             wsize;          /* write size in bytes */
   85         int             rsize;          /* read size in bytes */
   86         int             readdirsize;    /* readdir size in bytes */
   87         int             timeo;          /* initial timeout in .1 secs */
   88         int             retrans;        /* times to retry send */
   89         int             maxgrouplist;   /* Max. size of group list */
   90         int             readahead;      /* # of blocks to readahead */
   91         int             leaseterm;      /* Term (sec) of lease */
   92         int             deadthresh;     /* Retrans threshold */
   93         char            *hostname;      /* server's name */
   94 };
   95 
   96 struct nfs_diskless {
   97         struct ifaliasreq myif;                 /* Default interface */
   98         struct sockaddr_in mygateway;           /* Default gateway */
   99         struct onfs_args root_args;             /* Mount args for root fs */
  100         u_char          root_fh[NFSX_V2FH];     /* File handle of root dir */
  101         struct sockaddr_in root_saddr;          /* Address of root server */
  102         char            root_hostnam[MNAMELEN]; /* Host name for mount pt */
  103         long            root_time;              /* Timestamp of root fs */
  104         char            my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
  105 };
  106 
  107 #ifdef _KERNEL
  108 extern struct nfsv3_diskless nfsv3_diskless;
  109 extern struct nfs_diskless nfs_diskless;
  110 extern int      nfs_diskless_valid;
  111 void bootpc_init(void);
  112 void nfs_setup_diskless(void);
  113 void nfs_parse_options(const char *, struct nfs_args *);
  114 #endif
  115 
  116 #endif

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