/* $NetBSD: ops_tmpfs.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $ */
/*
* Copyright (c) 1997-2014 Erez Zadok
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
* File: am-utils/amd/ops_tmpfs.c
*
*/
/*
* TMPFS file system (combines RAM-fs and swap-fs)
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>
/* forward declarations */
static char *tmpfs_match(am_opts *fo);
static int tmpfs_mount(am_node *am, mntfs *mf);
static int tmpfs_umount(am_node *am, mntfs *mf);
/*
* Ops structure
*/
am_ops tmpfs_ops =
{
"tmpfs",
tmpfs_match,
0, /* tmpfs_init */
tmpfs_mount,
tmpfs_umount,
amfs_error_lookup_child,
amfs_error_mount_child,
amfs_error_readdir,
0, /* tmpfs_readlink */
0, /* tmpfs_mounted */
0, /* tmpfs_umounted */
amfs_generic_find_srvr,
0, /* tmpfs_get_wchan */
FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
#if defined(HAVE_FS_AUTOFS) && defined(AUTOFS_TMPFS_FS_FLAGS)
AUTOFS_TMPFS_FS_FLAGS,
#endif /* HAVE_FS_AUTOFS */
};
/*
* EFS needs local filesystem and device.
*/
static char *
tmpfs_match(am_opts *fo)
{
if (!fo->opt_dev) {
plog(XLOG_USER, "tmpfs: no device specified");
return 0;
}
dlog("EFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);
/*
* Determine magic cookie to put in mtab
*/
return xstrdup(fo->opt_dev);
}
static int
mount_tmpfs(char *mntdir, char *fs_name, char *opts, int on_autofs)
{
tmpfs_args_t tmpfs_args;
mntent_t mnt;
int flags;
const char *p;
/*
* Figure out the name of the file system type.
*/
MTYPE_TYPE type = MOUNT_TYPE_TMPFS;
p = NULL;
memset((voidp) &tmpfs_args, 0, sizeof(tmpfs_args)); /* Paranoid */
/*
* Fill in the mount structure
*/
memset((voidp) &mnt, 0, sizeof(mnt));
mnt.mnt_dir = mntdir;
mnt.mnt_fsname = fs_name;
mnt.mnt_type = MNTTAB_TYPE_TMPFS;
mnt.mnt_opts = opts;
flags = compute_mount_flags(&mnt);
#ifdef HAVE_FS_AUTOFS
if (on_autofs)
flags |= autofs_compute_mount_flags(&mnt);
#endif /* HAVE_FS_AUTOFS */
#if defined(HAVE_TMPFS_ARGS_T_TA_VERSION) && defined(TMPFS_ARGS_VERSION)
tmpfs_args.ta_version = TMPFS_ARGS_VERSION;
#endif /* HAVE_TMPFS_ARGS_T_TA_VERSION && TMPFS_ARGS_VERSION */
#ifdef HAVE_TMPFS_ARGS_T_TA_NODES_MAX
if ((p = amu_hasmntopt(&mnt, "nodes")) == NULL)
p = "1000000";
tmpfs_args.ta_nodes_max = atoi(p);
#endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */
#ifdef HAVE_TMPFS_ARGS_T_TA_SIZE_MAX
if ((p = amu_hasmntopt(&mnt, "size")) == NULL)
p = "10000000";
tmpfs_args.ta_size_max = atoi(p);
#endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */
#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_UID
if ((p = amu_hasmntopt(&mnt, "uid")) == NULL)
p = "0";
tmpfs_args.ta_root_uid = atoi(p);
#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_UID */
#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_GID
if ((p = amu_hasmntopt(&mnt, "gid")) == NULL)
p = "0";
tmpfs_args.ta_root_gid = atoi(p);
#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_GID */
#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_MODE
if ((p = amu_hasmntopt(&mnt, "mode")) == NULL)
p = "01777";
tmpfs_args.ta_root_mode = strtol(p, NULL, 8);
#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_MODE */
/*
* Call generic mount routine
*/
return mount_fs(&mnt, flags, (caddr_t) &tmpfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs);
}
static int
tmpfs_mount(am_node *am, mntfs *mf)
{
int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
int error;
error = mount_tmpfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
if (error) {
errno = error;
plog(XLOG_ERROR, "mount_tmpfs: %m");
return error;
}
return 0;
}
static int
tmpfs_umount(am_node *am, mntfs *mf)
{
int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
}
