amfs_error.c revision 302408 
1/*
2 * Copyright (c) 1997-2006 Erez Zadok
3 * Copyright (c) 1989 Jan-Simon Pendry
4 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1989 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgment:
21 *      This product includes software developed by the University of
22 *      California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 *    may be used to endorse or promote products derived from this software
25 *    without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 *
40 * File: am-utils/amd/amfs_error.c
41 *
42 */
43
44/*
45 * Error file system.
46 * This is used as a last resort catchall if
47 * nothing else worked.  EFS just returns lots
48 * of error codes, except for unmount which
49 * always works of course.
50 */
51
52#ifdef HAVE_CONFIG_H
53# include <config.h>
54#endif /* HAVE_CONFIG_H */
55#include <am_defs.h>
56#include <amd.h>
57
58static char *amfs_error_match(am_opts *fo);
59static int amfs_error_mount(am_node *am, mntfs *mf);
60static int amfs_error_umount(am_node *am, mntfs *mf);
61
62
63/*
64 * Ops structure
65 */
66am_ops amfs_error_ops =
67{
68  "error",
69  amfs_error_match,
70  0,				/* amfs_error_init */
71  amfs_error_mount,
72  amfs_error_umount,
73  amfs_error_lookup_child,
74  amfs_error_mount_child,
75  amfs_error_readdir,
76  0,				/* amfs_error_readlink */
77  0,				/* amfs_error_mounted */
78  0,				/* amfs_error_umounted */
79  amfs_generic_find_srvr,
80  0,				/* amfs_error_get_wchan */
81  FS_DISCARD,			/* nfs_fs_flags */
82#ifdef HAVE_FS_AUTOFS
83  AUTOFS_ERROR_FS_FLAGS,
84#endif /* HAVE_FS_AUTOFS */
85};
86
87
88
89/*
90 * EFS file system always matches
91 */
92static char *
93amfs_error_match(am_opts *fo)
94{
95  return strdup("(error-hook)");
96}
97
98
99static int
100amfs_error_mount(am_node *am, mntfs *mf)
101{
102  return ENOENT;
103}
104
105
106static int
107amfs_error_umount(am_node *am, mntfs *mf)
108{
109  /*
110   * Always succeed
111   */
112  return 0;
113}
114
115
116/*
117 * EFS interface to RPC lookup() routine.
118 * Should never get here in the automounter.
119 * If we do then just give an error.
120 */
121am_node *
122amfs_error_lookup_child(am_node *mp, char *fname, int *error_return, int op)
123{
124  *error_return = ESTALE;
125  return 0;
126}
127
128
129/*
130 * EFS interface to RPC lookup() routine.
131 * Should never get here in the automounter.
132 * If we do then just give an error.
133 */
134am_node *
135amfs_error_mount_child(am_node *ap, int *error_return)
136{
137  *error_return = ESTALE;
138  return 0;
139}
140
141
142/*
143 * EFS interface to RPC readdir() routine.
144 * Should never get here in the automounter.
145 * If we do then just give an error.
146 */
147int
148amfs_error_readdir(am_node *mp, nfscookie cookie, nfsdirlist *dp, nfsentry *ep, u_int count)
149{
150  return ESTALE;
151}
152