mirror of
https://github.com/libguestfs/libguestfs.git
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259 lines
7.7 KiB
C
259 lines
7.7 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009-2020 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include "daemon.h"
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#include "actions.h"
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#define MAX_ARGS 64
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/* Takes optional arguments, consult optargs_bitmask. */
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int
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do_mkfs (const char *fstype, const char *device, int blocksize,
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const char *features, int inode, int sectorsize, const char *label)
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{
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const char *argv[MAX_ARGS];
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size_t i = 0;
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char blocksize_str[32];
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char inode_str[32];
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char sectorsize_str[32];
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int r;
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CLEANUP_FREE char *err = NULL;
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int extfs = 0;
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if (fstype_is_extfs (fstype))
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extfs = 1;
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/* For ext2/3/4 run the mke2fs program directly. This is because
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* the mkfs program "eats" some options, in particular the -F
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* option.
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*/
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if (extfs)
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ADD_ARG (argv, i, "mke2fs");
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else
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ADD_ARG (argv, i, "mkfs");
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ADD_ARG (argv, i, "-t");
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ADD_ARG (argv, i, fstype);
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/* Force mke2fs to create a filesystem, even if it thinks it
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* shouldn't (RHBZ#690819).
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*/
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if (extfs)
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ADD_ARG (argv, i, "-F");
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/* mkfs.ntfs requires the -Q argument otherwise it writes zeroes to
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* every block and does bad block detection, neither of which are
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* useful behaviour for virtual devices. Also recent versions need
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* to be forced to create filesystems on non-partitions.
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*/
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if (STREQ (fstype, "ntfs")) {
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ADD_ARG (argv, i, "-Q");
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ADD_ARG (argv, i, "-F");
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}
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/* mkfs.reiserfs produces annoying interactive prompts unless you
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* tell it to be quiet.
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* mkfs.jfs is the same
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* mkfs.xfs must force to make xfs filesystem when the device already
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* has a filesystem on it
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*/
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if (STREQ (fstype, "reiserfs") || STREQ (fstype, "jfs") ||
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STREQ (fstype, "xfs"))
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ADD_ARG (argv, i, "-f");
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/* For GFS, GFS2, assume a single node. */
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if (STREQ (fstype, "gfs") || STREQ (fstype, "gfs2")) {
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ADD_ARG (argv, i, "-p");
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ADD_ARG (argv, i, "lock_nolock");
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/* The man page says this is default, but it doesn't seem to be: */
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ADD_ARG (argv, i, "-j");
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ADD_ARG (argv, i, "1");
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/* Don't ask questions: */
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ADD_ARG (argv, i, "-O");
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}
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/* Force mkfs.fat to create a whole disk filesystem (RHBZ#1039995). */
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if (STREQ (fstype, "fat") || STREQ (fstype, "vfat") ||
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STREQ (fstype, "msdos"))
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ADD_ARG (argv, i, "-I");
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/* Process blocksize parameter if set. */
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if (optargs_bitmask & GUESTFS_MKFS_BLOCKSIZE_BITMASK) {
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if (blocksize <= 0 || !is_power_of_2 (blocksize)) {
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reply_with_error ("block size must be > 0 and a power of 2");
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return -1;
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}
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if (STREQ (fstype, "vfat") ||
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STREQ (fstype, "msdos")) {
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/* For VFAT map the blocksize into a cluster size. However we
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* have to determine the block device sector size in order to do
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* this.
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*/
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const int ss = do_blockdev_getss (device);
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if (ss == -1)
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return -1;
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const int sectors_per_cluster = blocksize / ss;
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if (sectors_per_cluster < 1 || sectors_per_cluster > 128) {
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reply_with_error ("unsupported cluster size for %s filesystem (requested cluster size = %d, sector size = %d, trying sectors per cluster = %d)",
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fstype, blocksize, ss, sectors_per_cluster);
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return -1;
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}
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snprintf (blocksize_str, sizeof blocksize_str, "%d", sectors_per_cluster);
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ADD_ARG (argv, i, "-s");
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ADD_ARG (argv, i, blocksize_str);
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}
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else if (STREQ (fstype, "ntfs")) {
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/* For NTFS map the blocksize into a cluster size. */
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snprintf (blocksize_str, sizeof blocksize_str, "%d", blocksize);
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ADD_ARG (argv, i, "-c");
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ADD_ARG (argv, i, blocksize_str);
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}
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else if (STREQ (fstype, "btrfs")) {
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/* For btrfs, blocksize cannot be specified (RHBZ#807905). */
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reply_with_error ("blocksize cannot be set on btrfs filesystems, use 'mkfs-btrfs'");
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return -1;
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}
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else if (STREQ (fstype, "xfs")) {
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/* mkfs -t xfs -b size=<size> (RHBZ#981715). */
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snprintf (blocksize_str, sizeof blocksize_str, "size=%d", blocksize);
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ADD_ARG (argv, i, "-b");
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ADD_ARG (argv, i, blocksize_str);
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}
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else {
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/* For all other filesystem types, try the -b option. */
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snprintf (blocksize_str, sizeof blocksize_str, "%d", blocksize);
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ADD_ARG (argv, i, "-b");
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ADD_ARG (argv, i, blocksize_str);
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}
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}
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if (optargs_bitmask & GUESTFS_MKFS_FEATURES_BITMASK) {
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ADD_ARG (argv, i, "-O");
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ADD_ARG (argv, i, features);
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}
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if (optargs_bitmask & GUESTFS_MKFS_INODE_BITMASK) {
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if (!extfs) {
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reply_with_error ("inode size (-I) can only be set on ext2/3/4 filesystems");
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return -1;
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}
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if (inode <= 0) {
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reply_with_error ("inode size must be larger than zero");
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return -1;
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}
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snprintf (inode_str, sizeof inode_str, "%d", inode);
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ADD_ARG (argv, i, "-I");
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ADD_ARG (argv, i, inode_str);
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}
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if (optargs_bitmask & GUESTFS_MKFS_SECTORSIZE_BITMASK) {
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if (!STREQ (fstype, "ufs")) {
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reply_with_error ("sector size (-S) can only be set on ufs filesystems");
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return -1;
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}
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if (sectorsize <= 0) {
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reply_with_error ("sector size must be larger than zero");
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return -1;
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}
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snprintf (sectorsize_str, sizeof sectorsize_str, "%d", sectorsize);
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ADD_ARG (argv, i, "-S");
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ADD_ARG (argv, i, sectorsize_str);
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}
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if (optargs_bitmask & GUESTFS_MKFS_LABEL_BITMASK) {
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if (extfs) {
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if (strlen (label) > EXT2_LABEL_MAX) {
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reply_with_error ("%s: ext2/3/4 labels are limited to %d bytes",
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label, EXT2_LABEL_MAX);
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return -1;
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}
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ADD_ARG (argv, i, "-L");
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ADD_ARG (argv, i, label);
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}
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else if (STREQ (fstype, "fat") || STREQ (fstype, "vfat") ||
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STREQ (fstype, "msdos")) {
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ADD_ARG (argv, i, "-n");
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ADD_ARG (argv, i, label);
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}
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else if (STREQ (fstype, "ntfs")) {
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ADD_ARG (argv, i, "-L");
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ADD_ARG (argv, i, label);
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}
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else if (STREQ (fstype, "xfs")) {
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if (strlen (label) > XFS_LABEL_MAX) {
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reply_with_error ("%s: xfs labels are limited to %d bytes",
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label, XFS_LABEL_MAX);
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return -1;
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}
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ADD_ARG (argv, i, "-L");
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ADD_ARG (argv, i, label);
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}
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else if (STREQ (fstype, "btrfs")) {
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ADD_ARG (argv, i, "-L");
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ADD_ARG (argv, i, label);
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}
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else if (STREQ (fstype, "f2fs")) {
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ADD_ARG (argv, i, "-l");
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ADD_ARG (argv, i, label);
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}
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else {
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reply_with_error ("don't know how to set the label for '%s' filesystems",
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fstype);
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return -1;
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}
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}
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ADD_ARG (argv, i, device);
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ADD_ARG (argv, i, NULL);
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wipe_device_before_mkfs (device);
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r = commandv (NULL, &err, argv);
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if (r == -1) {
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reply_with_error ("%s: %s: %s", fstype, device, err);
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return -1;
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}
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return 0;
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}
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int
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do_mkfs_b (const char *fstype, int blocksize, const char *device)
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{
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optargs_bitmask = GUESTFS_MKFS_BLOCKSIZE_BITMASK;
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return do_mkfs (fstype, device, blocksize, 0, 0, 0, NULL);
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}
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