xref: /freebsd/sys/nfs/nfsdiskless.h (revision 380a989b3223d455375b4fae70fd0b9bdd43bafb)
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  * $Id: nfsdiskless.h,v 1.9 1997/05/12 19:02:55 tegge Exp $
38  */
39 
40 
41 #ifndef _NFS_NFSDISKLESS_H_
42 #define _NFS_NFSDISKLESS_H_
43 
44 /*
45  * Structure that must be initialized for a diskless nfs client.
46  * This structure is used by nfs_mountroot() to set up the root vnode,
47  * and to do a partial ifconfig(8) and route(8) so that the critical net
48  * interface can communicate with the server.
49  * The primary bootstrap is expected to fill in the appropriate fields before
50  * starting the kernel. Whether or not the swap area is nfs mounted is
51  * determined by the value in swdevt[0]. (equal to NODEV --> swap over nfs)
52  * Currently only works for AF_INET protocols.
53  * NB: All fields are stored in net byte order to avoid hassles with
54  * client/server byte ordering differences.
55  */
56 
57 /*
58  * I have defined a new structure that can handle an NFS Version 3 file handle
59  * but the kernel still expects the old Version 2 one to be provided. The
60  * changes required in nfs_vfsops.c for using the new are documented there in
61  * comments. (I felt that breaking network booting code by changing this
62  * structure would not be prudent at this time, since almost all servers are
63  * still Version 2 anyhow.)
64  */
65 struct nfsv3_diskless {
66 	struct ifaliasreq myif;			/* Default interface */
67 	struct sockaddr_in mygateway;		/* Default gateway */
68 	struct nfs_args	swap_args;		/* Mount args for swap file */
69 	int		swap_fhsize;		/* Size of file handle */
70 	u_char		swap_fh[NFSX_V3FHMAX];	/* Swap file's file handle */
71 	struct sockaddr_in swap_saddr;		/* Address of swap server */
72 	char		swap_hostnam[MNAMELEN];	/* Host name for mount pt */
73 	int		swap_nblks;		/* Size of server swap file */
74 	struct ucred	swap_ucred;		/* Swap credentials */
75 	struct nfs_args	root_args;		/* Mount args for root fs */
76 	int		root_fhsize;		/* Size of root file handle */
77 	u_char		root_fh[NFSX_V3FHMAX];	/* File handle of root dir */
78 	struct sockaddr_in root_saddr;		/* Address of root server */
79 	char		root_hostnam[MNAMELEN];	/* Host name for mount pt */
80 	long		root_time;		/* Timestamp of root fs */
81 	char		my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
82 };
83 
84 /*
85  * Old arguments to mount NFS
86  */
87 struct onfs_args {
88 	struct sockaddr	*addr;		/* file server address */
89 	int		addrlen;	/* length of address */
90 	int		sotype;		/* Socket type */
91 	int		proto;		/* and Protocol */
92 	u_char		*fh;		/* File handle to be mounted */
93 	int		fhsize;		/* Size, in bytes, of fh */
94 	int		flags;		/* flags */
95 	int		wsize;		/* write size in bytes */
96 	int		rsize;		/* read size in bytes */
97 	int		readdirsize;	/* readdir size in bytes */
98 	int		timeo;		/* initial timeout in .1 secs */
99 	int		retrans;	/* times to retry send */
100 	int		maxgrouplist;	/* Max. size of group list */
101 	int		readahead;	/* # of blocks to readahead */
102 	int		leaseterm;	/* Term (sec) of lease */
103 	int		deadthresh;	/* Retrans threshold */
104 	char		*hostname;	/* server's name */
105 };
106 
107 struct nfs_diskless {
108 	struct ifaliasreq myif;			/* Default interface */
109 	struct sockaddr_in mygateway;		/* Default gateway */
110 	struct onfs_args swap_args;		/* Mount args for swap file */
111 	u_char		swap_fh[NFSX_V2FH];	/* Swap file's file handle */
112 	struct sockaddr_in swap_saddr;		/* Address of swap server */
113 	char		swap_hostnam[MNAMELEN];	/* Host name for mount pt */
114 	int		swap_nblks;		/* Size of server swap file */
115 	struct ucred	swap_ucred;		/* Swap credentials */
116 	struct onfs_args root_args;		/* Mount args for root fs */
117 	u_char		root_fh[NFSX_V2FH];	/* File handle of root dir */
118 	struct sockaddr_in root_saddr;		/* Address of root server */
119 	char		root_hostnam[MNAMELEN];	/* Host name for mount pt */
120 	long		root_time;		/* Timestamp of root fs */
121 	char		my_hostnam[MAXHOSTNAMELEN]; /* Client host name */
122 };
123 
124 #endif
125