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nfsdiskless.h revision 1.1.1.3 
      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  */
     38 
     39 
     40 #ifndef _NFS_NFSDISKLESS_H_
     41 #define _NFS_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 and swap
     46  * vnodes plus 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 struct nfs_diskless {
     84 	struct ifaliasreq myif;			/* Default interface */
     85 	struct sockaddr_in mygateway;		/* Default gateway */
     86 	struct nfs_args	swap_args;		/* Mount args for swap file */
     87 	u_char		swap_fh[NFSX_V2FH];	/* Swap file's file handle */
     88 	struct sockaddr_in swap_saddr;		/* Address of swap server */
     89 	char		swap_hostnam[MNAMELEN];	/* Host name for mount pt */
     90 	int		swap_nblks;		/* Size of server swap file */
     91 	struct ucred	swap_ucred;		/* Swap credentials */
     92 	struct nfs_args	root_args;		/* Mount args for root fs */
     93 	u_char		root_fh[NFSX_V2FH];	/* File handle of root dir */
     94 	struct sockaddr_in root_saddr;		/* Address of root server */
     95 	char		root_hostnam[MNAMELEN];	/* Host name for mount pt */
     96 	long		root_time;		/* Timestamp of root fs */
     97 	char		my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
     98 };
     99 
    100 #endif
    101