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/*
* Copyright (C) 2000-2009, Parallels, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <unistd.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdio.h>
#include <limits.h>
#include "types.h"
#include "fs.h"
#include "logger.h"
#include "vzerror.h"
/* Check is fs mounted
* return: 1 - yes
* 0 - no
* < 0 - error
*/
int vz_fs_is_mounted(const char *target)
{
struct stat st1, st2;
char parent[PATH_MAX];
if (stat(target, &st1)) {
logger(-1, errno, "stat(%s)", target);
return -1;
}
snprintf(parent, sizeof(parent), "%s/..", target);
if (stat(parent, &st2)) {
logger(-1, errno, "stat(%s)", parent);
return -1;
}
return (st1.st_dev != st2.st_dev);
}
static char *fs_name = "simfs";
const char *vz_fs_get_name()
{
return fs_name;
}
int vz_mount(fs_param *fs, int flags)
{
int mntopt = fs->flags | flags;
const int remount = flags & MS_REMOUNT;
logger(2, 0, "Mounting root: %s %s", fs->root, fs->private);
if (mount(fs->private, fs->root, "simfs", mntopt,
remount ? "" : fs->private) < 0)
{
logger(-1, errno, "Can't mount: %s %s", fs->root, fs->private);
if (errno == ENODEV)
logger(-1, 0, "Kernel lacks simfs support. Please "
"compile it in, or load simfs module.");
return VZ_FS_CANTMOUNT;
}
return 0;
}