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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009-2011 Red Hat Inc.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include <sys/stat.h>
#include "daemon.h"
#include "actions.h"
#define MAX_ARGS 16
/* Takes optional arguments, consult optargs_bitmask. */
int
do_mkfs_opts (const char *fstype, const char *device, int blocksize,
const char *features, int inode)
{
const char *argv[MAX_ARGS];
size_t i = 0;
char blocksize_str[32];
char inode_str[32];
int r;
char *err;
char mke2fs[] = "mke2fs";
if (e2prog (mke2fs) == -1)
return -1;
/* For ext2/3/4 run the mke2fs program directly. This is because
* the mkfs program "eats" some options, in particular the -F
* option.
*/
if (STREQ (fstype, "ext2") || STREQ (fstype, "ext3") ||
STREQ (fstype, "ext4"))
argv[i++] = mke2fs;
else
argv[i++] = "mkfs";
argv[i++] = "-t";
argv[i++] = fstype;
/* Force mke2fs to create a filesystem, even if it thinks it
* shouldn't (RHBZ#690819).
*/
if (STREQ (fstype, "ext2") || STREQ (fstype, "ext3") ||
STREQ (fstype, "ext4"))
argv[i++] = "-F";
/* mkfs.ntfs requires the -Q argument otherwise it writes zeroes
* to every block and does bad block detection, neither of which
* are useful behaviour for virtual devices.
*/
if (STREQ (fstype, "ntfs"))
argv[i++] = "-Q";
/* mkfs.reiserfs produces annoying interactive prompts unless you
* tell it to be quiet.
*/
if (STREQ (fstype, "reiserfs"))
argv[i++] = "-f";
/* Same for JFS. */
if (STREQ (fstype, "jfs"))
argv[i++] = "-f";
/* For GFS, GFS2, assume a single node. */
if (STREQ (fstype, "gfs") || STREQ (fstype, "gfs2")) {
argv[i++] = "-p";
argv[i++] = "lock_nolock";
/* The man page says this is default, but it doesn't seem to be: */
argv[i++] = "-j";
argv[i++] = "1";
/* Don't ask questions: */
argv[i++] = "-O";
}
/* Process blocksize parameter if set. */
if (optargs_bitmask & GUESTFS_MKFS_OPTS_BLOCKSIZE_BITMASK) {
if (blocksize <= 0 || !is_power_of_2 (blocksize)) {
reply_with_error ("block size must be > 0 and a power of 2");
return -1;
}
if (STREQ (fstype, "vfat") ||
STREQ (fstype, "msdos")) {
/* For VFAT map the blocksize into a cluster size. However we
* have to determine the block device sector size in order to do
* this.
*/
int sectorsize = do_blockdev_getss (device);
if (sectorsize == -1)
return -1;
int sectors_per_cluster = blocksize / sectorsize;
if (sectors_per_cluster < 1 || sectors_per_cluster > 128) {
reply_with_error ("unsupported cluster size for %s filesystem (requested cluster size = %d, sector size = %d, trying sectors per cluster = %d)",
fstype, blocksize, sectorsize, sectors_per_cluster);
return -1;
}
snprintf (blocksize_str, sizeof blocksize_str, "%d", sectors_per_cluster);
argv[i++] = "-s";
argv[i++] = blocksize_str;
}
else if (STREQ (fstype, "ntfs")) {
/* For NTFS map the blocksize into a cluster size. */
snprintf (blocksize_str, sizeof blocksize_str, "%d", blocksize);
argv[i++] = "-c";
argv[i++] = blocksize_str;
}
else {
/* For all other filesystem types, try the -b option. */
snprintf (blocksize_str, sizeof blocksize_str, "%d", blocksize);
argv[i++] = "-b";
argv[i++] = blocksize_str;
}
}
if (optargs_bitmask & GUESTFS_MKFS_OPTS_FEATURES_BITMASK) {
argv[i++] = "-O";
argv[i++] = features;
}
if (optargs_bitmask & GUESTFS_MKFS_OPTS_INODE_BITMASK) {
if (!STREQ (fstype, "ext2") && !STREQ (fstype, "ext3") &&
!STREQ (fstype, "ext4")) {
reply_with_error ("inode size (-I) can only be set on ext2/3/4 filesystems");
return -1;
}
if (inode <= 0) {
reply_with_error ("inode size must be larger than zero");
return -1;
}
snprintf (inode_str, sizeof inode_str, "%d", inode);
argv[i++] = "-I";
argv[i++] = inode_str;
}
argv[i++] = device;
argv[i++] = NULL;
if (i > MAX_ARGS)
abort ();
r = commandv (NULL, &err, argv);
if (r == -1) {
reply_with_error ("%s: %s: %s", fstype, device, err);
free (err);
return -1;
}
free (err);
return 0;
}
int
do_mkfs (const char *fstype, const char *device)
{
optargs_bitmask = 0;
return do_mkfs_opts (fstype, device, 0, 0, 0);
}
int
do_mkfs_b (const char *fstype, int blocksize, const char *device)
{
optargs_bitmask = GUESTFS_MKFS_OPTS_BLOCKSIZE_BITMASK;
return do_mkfs_opts (fstype, device, blocksize, 0, 0);
}
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