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
|
/* libguestfs - the guestfsd daemon
* Copyright (C) 2009 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
static int
mkfs (const char *fstype, const char *device,
const char **extra, size_t nr_extra)
{
const char *argv[MAX_ARGS];
size_t i = 0, j;
int r;
char *err;
argv[i++] = "mkfs";
argv[i++] = "-t";
argv[i++] = fstype;
/* 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";
}
for (j = 0; j < nr_extra; ++j)
argv[i++] = extra[j];
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)
{
return mkfs (fstype, device, NULL, 0);
}
int
do_mkfs_b (const char *fstype, int blocksize, const char *device)
{
const char *extra[2];
char n[32];
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 (n, sizeof n, "%d", sectors_per_cluster);
extra[0] = "-s";
extra[1] = n;
}
else if (STREQ (fstype, "ntfs")) {
/* For NTFS map the blocksize into a cluster size. */
snprintf (n, sizeof n, "%d", blocksize);
extra[0] = "-c";
extra[1] = n;
}
else {
/* For all other filesystem types, try the -b option. */
snprintf (n, sizeof n, "%d", blocksize);
extra[0] = "-b";
extra[1] = n;
}
return mkfs (fstype, device, extra, 2);
}
|
