1 /* $NetBSD: amfs_direct.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $ */
2
3 /*
4 * Copyright (c) 1997-2014 Erez Zadok
5 * Copyright (c) 1990 Jan-Simon Pendry
6 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
7 * Copyright (c) 1990 The Regents of the University of California.
8 * All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * Jan-Simon Pendry at Imperial College, London.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 *
38 * File: am-utils/amd/amfs_direct.c
39 *
40 */
41
42 /*
43 * Direct file system
44 */
45
46 #ifdef HAVE_CONFIG_H
47 # include <config.h>
48 #endif /* HAVE_CONFIG_H */
49 #include <am_defs.h>
50 #include <amd.h>
51
52 /****************************************************************************
53 *** FORWARD DEFINITIONS ***
54 ****************************************************************************/
55 static am_node *amfs_direct_readlink(am_node *mp, int *error_return);
56
57 /****************************************************************************
58 *** OPS STRUCTURES ***
59 ****************************************************************************/
60 am_ops amfs_direct_ops =
61 {
62 "direct",
63 amfs_generic_match,
64 0, /* amfs_direct_init */
65 amfs_toplvl_mount,
66 amfs_toplvl_umount,
67 amfs_generic_lookup_child,
68 amfs_generic_mount_child,
69 amfs_error_readdir,
70 amfs_direct_readlink,
71 amfs_generic_mounted,
72 0, /* amfs_direct_umounted */
73 amfs_generic_find_srvr,
74 0, /* amfs_direct_get_wchan */
75 FS_DIRECT | FS_MKMNT | FS_NOTIMEOUT | FS_BACKGROUND | FS_AMQINFO,
76 #ifdef HAVE_FS_AUTOFS
77 AUTOFS_DIRECT_FS_FLAGS,
78 #endif /* HAVE_FS_AUTOFS */
79 };
80
81
82 /****************************************************************************
83 *** FUNCTIONS ***
84 ****************************************************************************/
85
86 static am_node *
amfs_direct_readlink(am_node * mp,int * error_return)87 amfs_direct_readlink(am_node *mp, int *error_return)
88 {
89 am_node *xp;
90 int rc = 0;
91
92 xp = next_nonerror_node(mp->am_child);
93 if (!xp) {
94 if (!mp->am_al->al_mnt->mf_private)
95 amfs_mkcacheref(mp->am_al->al_mnt);
96 xp = amfs_generic_lookup_child(mp, mp->am_path + 1, &rc, VLOOK_CREATE);
97 if (xp && rc < 0)
98 xp = amfs_generic_mount_child(xp, &rc);
99 }
100 if (xp) {
101 new_ttl(xp); /* (7/12/89) from Rein Tollevik */
102 return xp;
103 }
104 if (amd_state == Finishing)
105 rc = ENOENT;
106 *error_return = rc;
107 return 0;
108 }
109