amfs_error.c revision 310490 
1/*
2 * Copyright (c) 1997-2014 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. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *
36 * File: am-utils/amd/amfs_error.c
37 *
38 */
39
40/*
41 * Error file system.
42 * This is used as a last resort catchall if
43 * nothing else worked.  EFS just returns lots
44 * of error codes, except for unmount which
45 * always works of course.
46 */
47
48#ifdef HAVE_CONFIG_H
49# include <config.h>
50#endif /* HAVE_CONFIG_H */
51#include <am_defs.h>
52#include <amd.h>
53
54static char *amfs_error_match(am_opts *fo);
55static int amfs_error_mount(am_node *am, mntfs *mf);
56static int amfs_error_umount(am_node *am, mntfs *mf);
57
58
59/*
60 * Ops structure
61 */
62am_ops amfs_error_ops =
63{
64  "error",
65  amfs_error_match,
66  0,				/* amfs_error_init */
67  amfs_error_mount,
68  amfs_error_umount,
69  amfs_error_lookup_child,
70  amfs_error_mount_child,
71  amfs_error_readdir,
72  0,				/* amfs_error_readlink */
73  0,				/* amfs_error_mounted */
74  0,				/* amfs_error_umounted */
75  amfs_generic_find_srvr,
76  0,				/* amfs_error_get_wchan */
77  FS_DISCARD,			/* nfs_fs_flags */
78#ifdef HAVE_FS_AUTOFS
79  AUTOFS_ERROR_FS_FLAGS,
80#endif /* HAVE_FS_AUTOFS */
81};
82
83
84
85/*
86 * EFS file system always matches
87 */
88static char *
89amfs_error_match(am_opts *fo)
90{
91  return xstrdup("(error-hook)");
92}
93
94
95static int
96amfs_error_mount(am_node *am, mntfs *mf)
97{
98  return ENOENT;
99}
100
101
102static int
103amfs_error_umount(am_node *am, mntfs *mf)
104{
105  /*
106   * Always succeed
107   */
108  return 0;
109}
110
111
112/*
113 * EFS interface to RPC lookup() routine.
114 * Should never get here in the automounter.
115 * If we do then just give an error.
116 */
117am_node *
118amfs_error_lookup_child(am_node *mp, char *fname, int *error_return, int op)
119{
120  *error_return = ESTALE;
121  return 0;
122}
123
124
125/*
126 * EFS interface to RPC lookup() routine.
127 * Should never get here in the automounter.
128 * If we do then just give an error.
129 */
130am_node *
131amfs_error_mount_child(am_node *ap, int *error_return)
132{
133  *error_return = ESTALE;
134  return 0;
135}
136
137
138/*
139 * EFS interface to RPC readdir() routine.
140 * Should never get here in the automounter.
141 * If we do then just give an error.
142 */
143int
144amfs_error_readdir(am_node *mp, voidp cookie, voidp dp, voidp ep, u_int count)
145{
146  return ESTALE;
147}
148