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/*
* 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_lofs.c
*
*/
/*
* Loopback file system
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>
/* forward definitions */
static char *lofs_match(am_opts *fo);
static int lofs_mount(am_node *am, mntfs *mf);
static int lofs_umount(am_node *am, mntfs *mf);
/*
* Ops structure
*/
am_ops lofs_ops =
{
"lofs",
lofs_match,
0, /* lofs_init */
lofs_mount,
lofs_umount,
amfs_error_lookup_child,
amfs_error_mount_child,
amfs_error_readdir,
0, /* lofs_readlink */
0, /* lofs_mounted */
0, /* lofs_umounted */
amfs_generic_find_srvr,
0, /* lofs_get_wchan */
FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
#ifdef HAVE_FS_AUTOFS
AUTOFS_LOFS_FS_FLAGS,
#endif /* HAVE_FS_AUTOFS */
};
/*
* LOFS needs remote filesystem.
*/
static char *
lofs_match(am_opts *fo)
{
if (!fo->opt_rfs) {
plog(XLOG_USER, "lofs: no source filesystem specified");
return 0;
}
dlog("LOFS: mounting fs \"%s\" on \"%s\"",
fo->opt_rfs, fo->opt_fs);
/*
* Determine magic cookie to put in mtab
*/
return xstrdup(fo->opt_rfs);
}
int
mount_lofs(char *mntdir, char *fs_name, char *opts, int on_autofs)
{
mntent_t mnt;
int flags;
/*
* Figure out the name of the file system type.
*/
MTYPE_TYPE type = MOUNT_TYPE_LOFS;
/*
* 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_LOFS;
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 */
/*
* Call generic mount routine
*/
return mount_fs(&mnt, flags, NULL, 0, type, 0, NULL, mnttab_file_name, on_autofs);
}
static int
lofs_mount(am_node *am, mntfs *mf)
{
int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
int error;
error = mount_lofs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
if (error) {
errno = error;
plog(XLOG_ERROR, "mount_lofs: %m");
return error;
}
return 0;
}
static int
lofs_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);
}
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