1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#pragma ident	"%Z%%M%	%I%	%E% SMI"
27/* SunOS-4.1 1.16	*/
28
29#include <sys/types.h>
30#include <sys/param.h>
31#include <sys/vfs.h>
32#include <sys/t_lock.h>
33
34extern int swapinit(int fstype, char *name);
35
36/*
37 * WARNING: THE POSITIONS OF FILESYSTEM TYPES IN THIS TABLE SHOULD NOT
38 * BE CHANGED. These positions are used in generating fsids and
39 * fhandles.  Thus, changing positions will cause a server to change
40 * the fhandle it gives out for a file.  It is okay to reuse formerly
41 * used slots, just be sure that we're not going to start supporting
42 * the former owner of the slot again.
43 *
44 * Since there's been some question about whether the above comment is
45 * true, let's provide more detail.  Most filesystems call
46 * vfs_make_fsid with two arguments that go into making the fsid: the
47 * dev number, and the fs type number - which is the offset of the
48 * filesystem's entry in the below table.  If you would like to check
49 * if the position of the filesystem in this table still affects the
50 * fsid, just check what arguments filesystems are calling
51 * vfs_make_fsid with.
52 *
53 * The scenario we're trying to prevent here is:
54 *
55 * NFS server gets upgraded to new kernel version with different vfssw
56 * Clients are -not- rebooted, still retain filehandles
57 * NFS server boots up and now the fsid of an exported fs is different
58 *  --> Clients get stale file handle errors
59 */
60
61struct vfssw vfssw[] = {
62	{ "BADVFS" },				/* invalid */
63	{ "specfs" },				/* SPECFS */
64	{ "ufs" },				/* UFS */
65	{ "fifofs" },				/* FIFOFS */
66	{ "namefs" },				/* NAMEFS */
67	{ "proc" },				/* PROCFS */
68	{ "samfs" },				/* QFS */
69	{ "nfs" },				/* NFS Version 2 */
70	{ "zfs" },				/* ZFS */
71	{ "hsfs" },				/* HSFS */
72	{ "lofs" },				/* LOFS */
73	{ "tmpfs" },				/* TMPFS */
74	{ "fd" },				/* FDFS */
75	{ "pcfs" },				/* PCFS */
76	{ "swapfs", swapinit },			/* SWAPFS */
77	{ "mntfs" },				/* MNTFS */
78	{ "devfs" },				/* DEVFS */
79	{ "dev" },				/* DEV */
80	{ "ctfs" },				/* CONTRACTFS */
81	{ "objfs" },				/* OBJFS */
82	{ "sharefs" },				/* SHAREFS */
83	{ "dcfs" },				/* DCFS */
84	{ "smbfs" },				/* SMBFS */
85	{ "" },					/* reserved for loadable fs */
86	{ "" },
87	{ "" },
88	{ "" },
89	{ "" },
90	{ "" },
91	{ "" },
92	{ "" },
93	{ "" },
94	{ "" },
95	{ "" },
96	{ "" },
97	{ "" },
98};
99
100const int nfstype = (sizeof (vfssw) / sizeof (vfssw[0]));
101