 |
|
|
| |
1 /*
2 * Copyright (c) 1997-2005 Erez Zadok
3 * Copyright (c) 1990 Jan-Simon Pendry
4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1990 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/ops_lofs.c
41 *
42 */
43
44 /*
45 * Loopback file system
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
54 /* forward definitions */
55 static char *lofs_match(am_opts *fo);
56 static int lofs_mount(am_node *am, mntfs *mf);
57 static int lofs_umount(am_node *am, mntfs *mf);
58
59 /*
60 * Ops structure
61 */
62 am_ops lofs_ops =
63 {
64 "lofs",
65 lofs_match,
66 0, /* lofs_init */
67 lofs_mount,
68 lofs_umount,
69 amfs_error_lookup_child,
70 amfs_error_mount_child,
71 amfs_error_readdir,
72 0, /* lofs_readlink */
73 0, /* lofs_mounted */
74 0, /* lofs_umounted */
75 amfs_generic_find_srvr,
76 0, /* lofs_get_wchan */
77 FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
78 #ifdef HAVE_FS_AUTOFS
79 AUTOFS_LOFS_FS_FLAGS,
80 #endif /* HAVE_FS_AUTOFS */
81 };
82
83
84 /*
85 * LOFS needs remote filesystem.
86 */
87 static char *
88 lofs_match(am_opts *fo)
89 {
90 if (!fo->opt_rfs) {
91 plog(XLOG_USER, "lofs: no source filesystem specified");
92 return 0;
93 }
94 dlog("LOFS: mounting fs \"%s\" on \"%s\"",
95 fo->opt_rfs, fo->opt_fs);
96
97 /*
98 * Determine magic cookie to put in mtab
99 */
100 return strdup(fo->opt_rfs);
101 }
102
103
104 int
105 mount_lofs(char *mntdir, char *fs_name, char *opts, int on_autofs)
106 {
107 mntent_t mnt;
108 int flags;
109
110 /*
111 * Figure out the name of the file system type.
112 */
113 MTYPE_TYPE type = MOUNT_TYPE_LOFS;
114
115 /*
116 * Fill in the mount structure
117 */
118 memset((voidp) &mnt, 0, sizeof(mnt));
119 mnt.mnt_dir = mntdir;
120 mnt.mnt_fsname = fs_name;
121 mnt.mnt_type = MNTTAB_TYPE_LOFS;
122 mnt.mnt_opts = opts;
123
124 flags = compute_mount_flags(&mnt);
125 #ifdef HAVE_FS_AUTOFS
126 if (on_autofs)
127 flags |= autofs_compute_mount_flags(&mnt);
128 #endif /* HAVE_FS_AUTOFS */
129
130 /*
131 * Call generic mount routine
132 */
133 return mount_fs(&mnt, flags, NULL, 0, type, 0, NULL, mnttab_file_name, on_autofs);
134 }
135
136
137 static int
138 lofs_mount(am_node *am, mntfs *mf)
139 {
140 int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
141 int error;
142
143 error = mount_lofs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
144 if (error) {
145 errno = error;
146 plog(XLOG_ERROR, "mount_lofs: %m");
147 return error;
148 }
149 return 0;
150 }
151
152
153 static int
154 lofs_umount(am_node *am, mntfs *mf)
155 {
156 int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
157
158 return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
159 }
160
