1/*	$NetBSD$	*/
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/ops_tmpfs.c
39 *
40 */
41
42/*
43 * TMPFS file system (combines RAM-fs and swap-fs)
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/* forward declarations */
53static char *tmpfs_match(am_opts *fo);
54static int tmpfs_mount(am_node *am, mntfs *mf);
55static int tmpfs_umount(am_node *am, mntfs *mf);
56
57/*
58 * Ops structure
59 */
60am_ops tmpfs_ops =
61{
62  "tmpfs",
63  tmpfs_match,
64  0,				/* tmpfs_init */
65  tmpfs_mount,
66  tmpfs_umount,
67  amfs_error_lookup_child,
68  amfs_error_mount_child,
69  amfs_error_readdir,
70  0,				/* tmpfs_readlink */
71  0,				/* tmpfs_mounted */
72  0,				/* tmpfs_umounted */
73  amfs_generic_find_srvr,
74  0,				/* tmpfs_get_wchan */
75  FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
76#if defined(HAVE_FS_AUTOFS) && defined(AUTOFS_TMPFS_FS_FLAGS)
77  AUTOFS_TMPFS_FS_FLAGS,
78#endif /* HAVE_FS_AUTOFS */
79};
80
81
82/*
83 * EFS needs local filesystem and device.
84 */
85static char *
86tmpfs_match(am_opts *fo)
87{
88
89  if (!fo->opt_dev) {
90    plog(XLOG_USER, "tmpfs: no device specified");
91    return 0;
92  }
93
94  dlog("EFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);
95
96  /*
97   * Determine magic cookie to put in mtab
98   */
99  return xstrdup(fo->opt_dev);
100}
101
102
103static int
104mount_tmpfs(char *mntdir, char *fs_name, char *opts, int on_autofs)
105{
106  tmpfs_args_t tmpfs_args;
107  mntent_t mnt;
108  int flags;
109  const char *p;
110
111  /*
112   * Figure out the name of the file system type.
113   */
114  MTYPE_TYPE type = MOUNT_TYPE_TMPFS;
115
116  p = NULL;
117  memset((voidp) &tmpfs_args, 0, sizeof(tmpfs_args)); /* Paranoid */
118
119  /*
120   * Fill in the mount structure
121   */
122  memset((voidp) &mnt, 0, sizeof(mnt));
123  mnt.mnt_dir = mntdir;
124  mnt.mnt_fsname = fs_name;
125  mnt.mnt_type = MNTTAB_TYPE_TMPFS;
126  mnt.mnt_opts = opts;
127
128  flags = compute_mount_flags(&mnt);
129#ifdef HAVE_FS_AUTOFS
130  if (on_autofs)
131    flags |= autofs_compute_mount_flags(&mnt);
132#endif /* HAVE_FS_AUTOFS */
133
134#if defined(HAVE_TMPFS_ARGS_T_TA_VERSION) && defined(TMPFS_ARGS_VERSION)
135  tmpfs_args.ta_version = TMPFS_ARGS_VERSION;
136#endif /* HAVE_TMPFS_ARGS_T_TA_VERSION && TMPFS_ARGS_VERSION */
137#ifdef HAVE_TMPFS_ARGS_T_TA_NODES_MAX
138  if ((p = amu_hasmntopt(&mnt, "nodes")) == NULL)
139	p = "1000000";
140  tmpfs_args.ta_nodes_max = atoi(p);
141#endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */
142#ifdef HAVE_TMPFS_ARGS_T_TA_SIZE_MAX
143  if ((p = amu_hasmntopt(&mnt, "size")) == NULL)
144	p = "10000000";
145  tmpfs_args.ta_size_max = atoi(p);
146#endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */
147#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_UID
148  if ((p = amu_hasmntopt(&mnt, "uid")) == NULL)
149	p = "0";
150  tmpfs_args.ta_root_uid = atoi(p);
151#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_UID */
152#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_GID
153  if ((p = amu_hasmntopt(&mnt, "gid")) == NULL)
154	p = "0";
155  tmpfs_args.ta_root_gid = atoi(p);
156#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_GID */
157#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_MODE
158  if ((p = amu_hasmntopt(&mnt, "mode")) == NULL)
159	p = "01777";
160  tmpfs_args.ta_root_mode = strtol(p, NULL, 8);
161#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_MODE */
162
163  /*
164   * Call generic mount routine
165   */
166  return mount_fs(&mnt, flags, (caddr_t) &tmpfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs);
167}
168
169
170static int
171tmpfs_mount(am_node *am, mntfs *mf)
172{
173  int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
174  int error;
175
176  error = mount_tmpfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
177  if (error) {
178    errno = error;
179    plog(XLOG_ERROR, "mount_tmpfs: %m");
180    return error;
181  }
182
183  return 0;
184}
185
186
187static int
188tmpfs_umount(am_node *am, mntfs *mf)
189{
190  int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
191
192  return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
193}
194
195