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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <unistd.h>
#include "id128-util.h"
#include "mkfs-util.h"
#include "path-util.h"
#include "process-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "utf8.h"
int mkfs_exists(const char *fstype) {
const char *mkfs;
int r;
assert(fstype);
if (STR_IN_SET(fstype, "auto", "swap")) /* these aren't real file system types, refuse early */
return -EINVAL;
mkfs = strjoina("mkfs.", fstype);
if (!filename_is_valid(mkfs)) /* refuse file system types with slashes and similar */
return -EINVAL;
r = find_executable(mkfs, NULL);
if (r == -ENOENT)
return false;
if (r < 0)
return r;
return true;
}
static int mangle_linux_fs_label(const char *s, size_t max_len, char **ret) {
/* Not more than max_len bytes (12 or 16) */
assert(s);
assert(max_len > 0);
assert(ret);
const char *q;
char *ans;
for (q = s; *q;) {
int l;
l = utf8_encoded_valid_unichar(q, SIZE_MAX);
if (l < 0)
return l;
if ((size_t) (q - s + l) > max_len)
break;
q += l;
}
ans = memdup_suffix0(s, q - s);
if (!ans)
return -ENOMEM;
*ret = ans;
return 0;
}
static int mangle_fat_label(const char *s, char **ret) {
assert(s);
_cleanup_free_ char *q = NULL;
int r;
r = utf8_to_ascii(s, '_', &q);
if (r < 0)
return r;
/* Classic FAT only allows 11 character uppercase labels */
strshorten(q, 11);
ascii_strupper(q);
/* mkfs.vfat: Labels with characters *?.,;:/\|+=<>[]" are not allowed.
* Let's also replace any control chars. */
for (char *p = q; *p; p++)
if (strchr("*?.,;:/\\|+=<>[]\"", *p) || char_is_cc(*p))
*p = '_';
*ret = TAKE_PTR(q);
return 0;
}
int make_filesystem(
const char *node,
const char *fstype,
const char *label,
sd_id128_t uuid,
bool discard) {
_cleanup_free_ char *mkfs = NULL, *mangled_label = NULL;
char vol_id[CONST_MAX(ID128_UUID_STRING_MAX, 8 + 1)] = {};
int r;
assert(node);
assert(fstype);
assert(label);
if (streq(fstype, "swap")) {
r = find_executable("mkswap", &mkfs);
if (r == -ENOENT)
return log_error_errno(SYNTHETIC_ERRNO(EPROTONOSUPPORT), "mkswap binary not available.");
if (r < 0)
return log_error_errno(r, "Failed to determine whether mkswap binary exists: %m");
} else {
r = mkfs_exists(fstype);
if (r < 0)
return log_error_errno(r, "Failed to determine whether mkfs binary for %s exists: %m", fstype);
if (r == 0)
return log_error_errno(SYNTHETIC_ERRNO(EPROTONOSUPPORT), "mkfs binary for %s is not available.", fstype);
mkfs = strjoin("mkfs.", fstype);
if (!mkfs)
return log_oom();
}
if (STR_IN_SET(fstype, "ext2", "ext3", "ext4", "xfs", "swap")) {
size_t max_len =
streq(fstype, "xfs") ? 12 :
streq(fstype, "swap") ? 15 :
16;
r = mangle_linux_fs_label(label, max_len, &mangled_label);
if (r < 0)
return log_error_errno(r, "Failed to determine volume label from string \"%s\": %m", label);
label = mangled_label;
} else if (streq(fstype, "vfat")) {
r = mangle_fat_label(label, &mangled_label);
if (r < 0)
return log_error_errno(r, "Failed to determine FAT label from string \"%s\": %m", label);
label = mangled_label;
xsprintf(vol_id, "%08" PRIx32,
((uint32_t) uuid.bytes[0] << 24) |
((uint32_t) uuid.bytes[1] << 16) |
((uint32_t) uuid.bytes[2] << 8) |
((uint32_t) uuid.bytes[3])); /* Take first 32 bytes of UUID */
}
if (isempty(vol_id))
id128_to_uuid_string(uuid, vol_id);
r = safe_fork("(mkfs)", FORK_RESET_SIGNALS|FORK_RLIMIT_NOFILE_SAFE|FORK_DEATHSIG|FORK_LOG|FORK_WAIT|FORK_STDOUT_TO_STDERR, NULL);
if (r < 0)
return r;
if (r == 0) {
/* Child */
/* When changing this conditional, also adjust the log statement below. */
if (streq(fstype, "ext2"))
(void) execlp(mkfs, mkfs,
"-q",
"-L", label,
"-U", vol_id,
"-I", "256",
"-m", "0",
"-E", discard ? "discard,lazy_itable_init=1" : "nodiscard,lazy_itable_init=1",
node, NULL);
else if (STR_IN_SET(fstype, "ext3", "ext4"))
(void) execlp(mkfs, mkfs,
"-q",
"-L", label,
"-U", vol_id,
"-I", "256",
"-O", "has_journal",
"-m", "0",
"-E", discard ? "discard,lazy_itable_init=1" : "nodiscard,lazy_itable_init=1",
node, NULL);
else if (streq(fstype, "btrfs")) {
(void) execlp(mkfs, mkfs,
"-q",
"-L", label,
"-U", vol_id,
node,
discard ? NULL : "--nodiscard",
NULL);
} else if (streq(fstype, "f2fs")) {
(void) execlp(mkfs, mkfs,
"-q",
"-g", /* "default options" */
"-f", /* force override, without this it doesn't seem to want to write to an empty partition */
"-l", label,
"-U", vol_id,
"-t", one_zero(discard),
node,
NULL);
} else if (streq(fstype, "xfs")) {
const char *j;
j = strjoina("uuid=", vol_id);
(void) execlp(mkfs, mkfs,
"-q",
"-L", label,
"-m", j,
"-m", "reflink=1",
node,
discard ? NULL : "-K",
NULL);
} else if (streq(fstype, "vfat"))
(void) execlp(mkfs, mkfs,
"-i", vol_id,
"-n", label,
"-F", "32", /* yes, we force FAT32 here */
node, NULL);
else if (streq(fstype, "swap"))
/* TODO: add --quiet here if
* https://github.com/util-linux/util-linux/issues/1499 resolved. */
(void) execlp(mkfs, mkfs,
"-L", label,
"-U", vol_id,
node, NULL);
else
/* Generic fallback for all other file systems */
(void) execlp(mkfs, mkfs, node, NULL);
log_error_errno(errno, "Failed to execute %s: %m", mkfs);
_exit(EXIT_FAILURE);
}
if (STR_IN_SET(fstype, "ext2", "ext3", "ext4", "btrfs", "f2fs", "xfs", "vfat", "swap"))
log_info("%s successfully formatted as %s (label \"%s\", uuid %s)",
node, fstype, label, vol_id);
else
log_info("%s successfully formatted as %s (no label or uuid specified)",
node, fstype);
return 0;
}
|
