1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 64
/* Takes optional arguments, consult optargs_bitmask. */
int
do_mkfs_opts (const char *fstype, const char *device, int blocksize,
const char *features, int inode, int sectorsize)
{
const char *argv[MAX_ARGS];
size_t i = 0;
char blocksize_str[32];
char inode_str[32];
char sectorsize_str[32];
int r;
char *err;
char mke2fs[] = "mke2fs";
/* 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")) {
if (e2prog (mke2fs) == -1)
return -1;
ADD_ARG (argv, i, mke2fs);
}
else
ADD_ARG (argv, i, "mkfs");
ADD_ARG (argv, i, "-t");
ADD_ARG (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"))
ADD_ARG (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"))
ADD_ARG (argv, i, "-Q");
/* mkfs.reiserfs produces annoying interactive prompts unless you
* tell it to be quiet.
*/
if (STREQ (fstype, "reiserfs"))
ADD_ARG (argv, i, "-f");
/* Same for JFS. */
if (STREQ (fstype, "jfs"))
ADD_ARG (argv, i, "-f");
/* For GFS, GFS2, assume a single node. */
if (STREQ (fstype, "gfs") || STREQ (fstype, "gfs2")) {
ADD_ARG (argv, i, "-p");
ADD_ARG (argv, i, "lock_nolock");
/* The man page says this is default, but it doesn't seem to be: */
ADD_ARG (argv, i, "-j");
ADD_ARG (argv, i, "1");
/* Don't ask questions: */
ADD_ARG (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);
ADD_ARG (argv, i, "-s");
ADD_ARG (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);
ADD_ARG (argv, i, "-c");
ADD_ARG (argv, i, blocksize_str);
}
else {
/* For all other filesystem types, try the -b option. */
snprintf (blocksize_str, sizeof blocksize_str, "%d", blocksize);
ADD_ARG (argv, i, "-b");
ADD_ARG (argv, i, blocksize_str);
}
}
if (optargs_bitmask & GUESTFS_MKFS_OPTS_FEATURES_BITMASK) {
ADD_ARG (argv, i, "-O");
ADD_ARG (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);
ADD_ARG (argv, i, "-I");
ADD_ARG (argv, i, inode_str);
}
if (optargs_bitmask & GUESTFS_MKFS_OPTS_SECTORSIZE_BITMASK) {
if (!STREQ (fstype, "ufs")) {
reply_with_error ("sector size (-S) can only be set on ufs filesystems");
return -1;
}
if (sectorsize <= 0) {
reply_with_error ("sector size must be larger than zero");
return -1;
}
snprintf (sectorsize_str, sizeof sectorsize_str, "%d", sectorsize);
ADD_ARG (argv, i, "-S");
ADD_ARG (argv, i, sectorsize_str);
}
ADD_ARG (argv, i, device);
ADD_ARG (argv, i, NULL);
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, 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, 0);
}
|
