1 /* libguestfs - the guestfsd daemon
2 * Copyright (C) 2009 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
34 /* Takes optional arguments, consult optargs_bitmask. */
36 do_mkfs_opts (const char *fstype, const char *device, int blocksize)
38 const char *argv[MAX_ARGS];
40 char blocksize_str[32];
48 /* mkfs.ntfs requires the -Q argument otherwise it writes zeroes
49 * to every block and does bad block detection, neither of which
50 * are useful behaviour for virtual devices.
52 if (STREQ (fstype, "ntfs"))
55 /* mkfs.reiserfs produces annoying interactive prompts unless you
56 * tell it to be quiet.
58 if (STREQ (fstype, "reiserfs"))
62 if (STREQ (fstype, "jfs"))
65 /* For GFS, GFS2, assume a single node. */
66 if (STREQ (fstype, "gfs") || STREQ (fstype, "gfs2")) {
68 argv[i++] = "lock_nolock";
69 /* The man page says this is default, but it doesn't seem to be: */
72 /* Don't ask questions: */
76 /* Process blocksize parameter if set. */
77 if (optargs_bitmask & GUESTFS_MKFS_OPTS_BLOCKSIZE_BITMASK) {
78 if (blocksize <= 0 || !is_power_of_2 (blocksize)) {
79 reply_with_error ("block size must be > 0 and a power of 2");
83 if (STREQ (fstype, "vfat") ||
84 STREQ (fstype, "msdos")) {
85 /* For VFAT map the blocksize into a cluster size. However we
86 * have to determine the block device sector size in order to do
89 int sectorsize = do_blockdev_getss (device);
93 int sectors_per_cluster = blocksize / sectorsize;
94 if (sectors_per_cluster < 1 || sectors_per_cluster > 128) {
95 reply_with_error ("unsupported cluster size for %s filesystem (requested cluster size = %d, sector size = %d, trying sectors per cluster = %d)",
96 fstype, blocksize, sectorsize, sectors_per_cluster);
100 snprintf (blocksize_str, sizeof blocksize_str, "%d", sectors_per_cluster);
102 argv[i++] = blocksize_str;
104 else if (STREQ (fstype, "ntfs")) {
105 /* For NTFS map the blocksize into a cluster size. */
106 snprintf (blocksize_str, sizeof blocksize_str, "%d", blocksize);
108 argv[i++] = blocksize_str;
111 /* For all other filesystem types, try the -b option. */
112 snprintf (blocksize_str, sizeof blocksize_str, "%d", blocksize);
114 argv[i++] = blocksize_str;
124 r = commandv (NULL, &err, argv);
126 reply_with_error ("%s: %s: %s", fstype, device, err);
136 do_mkfs (const char *fstype, const char *device)
139 return do_mkfs_opts (fstype, device, 0);
143 do_mkfs_b (const char *fstype, int blocksize, const char *device)
145 optargs_bitmask = GUESTFS_MKFS_OPTS_BLOCKSIZE_BITMASK;
146 return do_mkfs_opts (fstype, device, blocksize);