FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfsdiskless.h
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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