1/*	$NetBSD: ops_tmpfs.c,v 1.1.1.2 2009/03/20 20:26:50 christos Exp $	*/
2
3/*
4 * Copyright (c) 1997-2009 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. All advertising materials mentioning features or use of this software
22 *    must display the following acknowledgment:
23 *      This product includes software developed by the University of
24 *      California, Berkeley and its contributors.
25 * 4. Neither the name of the University nor the names of its contributors
26 *    may be used to endorse or promote products derived from this software
27 *    without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * SUCH DAMAGE.
40 *
41 *
42 * File: am-utils/amd/ops_tmpfs.c
43 *
44 */
45
46/*
47 * TMPFS file system (combines RAM-fs and swap-fs)
48 */
49
50#ifdef HAVE_CONFIG_H
51# include <config.h>
52#endif /* HAVE_CONFIG_H */
53#include <am_defs.h>
54#include <amd.h>
55
56/* forward declarations */
57static char *tmpfs_match(am_opts *fo);
58static int tmpfs_mount(am_node *am, mntfs *mf);
59static int tmpfs_umount(am_node *am, mntfs *mf);
60
61/*
62 * Ops structure
63 */
64am_ops tmpfs_ops =
65{
66  "tmpfs",
67  tmpfs_match,
68  0,				/* tmpfs_init */
69  tmpfs_mount,
70  tmpfs_umount,
71  amfs_error_lookup_child,
72  amfs_error_mount_child,
73  amfs_error_readdir,
74  0,				/* tmpfs_readlink */
75  0,				/* tmpfs_mounted */
76  0,				/* tmpfs_umounted */
77  amfs_generic_find_srvr,
78  0,				/* tmpfs_get_wchan */
79  FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
80#ifdef HAVE_FS_AUTOFS
81  AUTOFS_TMPFS_FS_FLAGS,
82#endif /* HAVE_FS_AUTOFS */
83};
84
85
86/*
87 * EFS needs local filesystem and device.
88 */
89static char *
90tmpfs_match(am_opts *fo)
91{
92
93  if (!fo->opt_dev) {
94    plog(XLOG_USER, "tmpfs: no device specified");
95    return 0;
96  }
97
98  dlog("EFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);
99
100  /*
101   * Determine magic cookie to put in mtab
102   */
103  return strdup(fo->opt_dev);
104}
105
106
107static int
108mount_tmpfs(char *mntdir, char *fs_name, char *opts, int on_autofs)
109{
110  tmpfs_args_t tmpfs_args;
111  mntent_t mnt;
112  int flags;
113  const char *p;
114
115  /*
116   * Figure out the name of the file system type.
117   */
118  MTYPE_TYPE type = MOUNT_TYPE_TMPFS;
119
120  p = NULL;
121  memset((voidp) &tmpfs_args, 0, sizeof(tmpfs_args)); /* Paranoid */
122
123  /*
124   * Fill in the mount structure
125   */
126  memset((voidp) &mnt, 0, sizeof(mnt));
127  mnt.mnt_dir = mntdir;
128  mnt.mnt_fsname = fs_name;
129  mnt.mnt_type = MNTTAB_TYPE_TMPFS;
130  mnt.mnt_opts = opts;
131
132  flags = compute_mount_flags(&mnt);
133#ifdef HAVE_FS_AUTOFS
134  if (on_autofs)
135    flags |= autofs_compute_mount_flags(&mnt);
136#endif /* HAVE_FS_AUTOFS */
137
138#if defined(HAVE_TMPFS_ARGS_T_TA_VERSION) && defined(TMPFS_ARGS_VERSION)
139  tmpfs_args.ta_version = TMPFS_ARGS_VERSION;
140#endif /* HAVE_TMPFS_ARGS_T_TA_VERSION && TMPFS_ARGS_VERSION */
141#ifdef HAVE_TMPFS_ARGS_T_TA_NODES_MAX
142  if ((p = amu_hasmntopt(&mnt, "nodes")) == NULL)
143	p = "1000000";
144  tmpfs_args.ta_nodes_max = atoi(p);
145#endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */
146#ifdef HAVE_TMPFS_ARGS_T_TA_SIZE_MAX
147  if ((p = amu_hasmntopt(&mnt, "size")) == NULL)
148	p = "10000000";
149  tmpfs_args.ta_size_max = atoi(p);
150#endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */
151#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_UID
152  if ((p = amu_hasmntopt(&mnt, "uid")) == NULL)
153	p = "0";
154  tmpfs_args.ta_root_uid = atoi(p);
155#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_UID */
156#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_GID
157  if ((p = amu_hasmntopt(&mnt, "gid")) == NULL)
158	p = "0";
159  tmpfs_args.ta_root_gid = atoi(p);
160#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_GID */
161#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_MODE
162  if ((p = amu_hasmntopt(&mnt, "mode")) == NULL)
163	p = "01777";
164  tmpfs_args.ta_root_mode = strtol(p, NULL, 8);
165#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_MODE */
166
167  /*
168   * Call generic mount routine
169   */
170  return mount_fs(&mnt, flags, (caddr_t) &tmpfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs);
171}
172
173
174static int
175tmpfs_mount(am_node *am, mntfs *mf)
176{
177  int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
178  int error;
179
180  error = mount_tmpfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
181  if (error) {
182    errno = error;
183    plog(XLOG_ERROR, "mount_tmpfs: %m");
184    return error;
185  }
186
187  return 0;
188}
189
190
191static int
192tmpfs_umount(am_node *am, mntfs *mf)
193{
194  int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
195
196  return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
197}
198
199