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
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
|
/*
* Copyright (c) 2002 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/disklabel.h>
#include <err.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "map.h"
#include "gpt.h"
/*
* Allow compilation on platforms that do not have a BSD label.
* The values are valid for amd64, i386 and ia64 disklabels.
*/
#ifndef LABELOFFSET
#define LABELOFFSET 0
#endif
#ifndef LABELSECTOR
#define LABELSECTOR 1
#endif
static int slice;
static void
usage_migrate(void)
{
fprintf(stderr,
"usage: %s [-s] device\n", getprogname());
exit(1);
}
static struct gpt_ent*
migrate_disklabel(int fd, off_t start, struct gpt_ent *ent)
{
char *buf;
struct disklabel *dl;
off_t ofs, rawofs;
int i;
buf = gpt_read(fd, start + LABELSECTOR, 1);
dl = (void*)(buf + LABELOFFSET);
if (le32toh(dl->d_magic) != DISKMAGIC ||
le32toh(dl->d_magic2) != DISKMAGIC) {
warnx("%s: warning: FreeBSD slice without disklabel",
device_name);
return (ent);
}
rawofs = le32toh(dl->d_partitions[RAW_PART].p_offset) *
le32toh(dl->d_secsize);
for (i = 0; i < le16toh(dl->d_npartitions); i++) {
if (dl->d_partitions[i].p_fstype == FS_UNUSED)
continue;
ofs = le32toh(dl->d_partitions[i].p_offset) *
le32toh(dl->d_secsize);
if (ofs < rawofs)
rawofs = 0;
}
rawofs /= secsz;
for (i = 0; i < le16toh(dl->d_npartitions); i++) {
switch (dl->d_partitions[i].p_fstype) {
case FS_UNUSED:
continue;
case FS_SWAP: {
uuid_t swap = GPT_ENT_TYPE_FREEBSD_SWAP;
le_uuid_enc(&ent->ent_type, &swap);
unicode16(ent->ent_name,
L"FreeBSD swap partition", 36);
break;
}
case FS_BSDFFS: {
uuid_t ufs = GPT_ENT_TYPE_FREEBSD_UFS;
le_uuid_enc(&ent->ent_type, &ufs);
unicode16(ent->ent_name,
L"FreeBSD UFS partition", 36);
break;
}
case FS_VINUM: {
uuid_t vinum = GPT_ENT_TYPE_FREEBSD_VINUM;
le_uuid_enc(&ent->ent_type, &vinum);
unicode16(ent->ent_name,
L"FreeBSD vinum partition", 36);
break;
}
default:
warnx("%s: warning: unknown FreeBSD partition (%d)",
device_name, dl->d_partitions[i].p_fstype);
continue;
}
ofs = (le32toh(dl->d_partitions[i].p_offset) *
le32toh(dl->d_secsize)) / secsz;
ofs = (ofs > 0) ? ofs - rawofs : 0;
ent->ent_lba_start = htole64(start + ofs);
ent->ent_lba_end = htole64(start + ofs +
le32toh(dl->d_partitions[i].p_size) - 1LL);
ent++;
}
return (ent);
}
static void
migrate(int fd)
{
uuid_t uuid;
off_t blocks, last;
map_t *gpt, *tpg;
map_t *tbl, *lbt;
map_t *map;
struct gpt_hdr *hdr;
struct gpt_ent *ent;
struct mbr *mbr;
uint32_t start, size;
unsigned int i;
last = mediasz / secsz - 1LL;
map = map_find(MAP_TYPE_MBR);
if (map == NULL || map->map_start != 0) {
warnx("%s: error: no partitions to convert", device_name);
return;
}
mbr = map->map_data;
if (map_find(MAP_TYPE_PRI_GPT_HDR) != NULL ||
map_find(MAP_TYPE_SEC_GPT_HDR) != NULL) {
warnx("%s: error: device already contains a GPT", device_name);
return;
}
/* Get the amount of free space after the MBR */
blocks = map_free(1LL, 0LL);
if (blocks == 0LL) {
warnx("%s: error: no room for the GPT header", device_name);
return;
}
/* Don't create more than parts entries. */
if ((uint64_t)(blocks - 1) * secsz > parts * sizeof(struct gpt_ent)) {
blocks = (parts * sizeof(struct gpt_ent)) / secsz;
if ((parts * sizeof(struct gpt_ent)) % secsz)
blocks++;
blocks++; /* Don't forget the header itself */
}
/* Never cross the median of the device. */
if ((blocks + 1LL) > ((last + 1LL) >> 1))
blocks = ((last + 1LL) >> 1) - 1LL;
/*
* Get the amount of free space at the end of the device and
* calculate the size for the GPT structures.
*/
map = map_last();
if (map->map_type != MAP_TYPE_UNUSED) {
warnx("%s: error: no room for the backup header", device_name);
return;
}
if (map->map_size < blocks)
blocks = map->map_size;
if (blocks == 1LL) {
warnx("%s: error: no room for the GPT table", device_name);
return;
}
blocks--; /* Number of blocks in the GPT table. */
gpt = map_add(1LL, 1LL, MAP_TYPE_PRI_GPT_HDR, calloc(1, secsz));
tbl = map_add(2LL, blocks, MAP_TYPE_PRI_GPT_TBL,
calloc(blocks, secsz));
if (gpt == NULL || tbl == NULL)
return;
lbt = map_add(last - blocks, blocks, MAP_TYPE_SEC_GPT_TBL,
tbl->map_data);
tpg = map_add(last, 1LL, MAP_TYPE_SEC_GPT_HDR, calloc(1, secsz));
hdr = gpt->map_data;
memcpy(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig));
hdr->hdr_revision = htole32(GPT_HDR_REVISION);
/*
* XXX struct gpt_hdr is not a multiple of 8 bytes in size and thus
* contains padding we must not include in the size.
*/
hdr->hdr_size = htole32(offsetof(struct gpt_hdr, padding));
hdr->hdr_lba_self = htole64(gpt->map_start);
hdr->hdr_lba_alt = htole64(tpg->map_start);
hdr->hdr_lba_start = htole64(tbl->map_start + blocks);
hdr->hdr_lba_end = htole64(lbt->map_start - 1LL);
uuid_create(&uuid, NULL);
le_uuid_enc(&hdr->hdr_uuid, &uuid);
hdr->hdr_lba_table = htole64(tbl->map_start);
hdr->hdr_entries = htole32((blocks * secsz) / sizeof(struct gpt_ent));
if (le32toh(hdr->hdr_entries) > parts)
hdr->hdr_entries = htole32(parts);
hdr->hdr_entsz = htole32(sizeof(struct gpt_ent));
ent = tbl->map_data;
for (i = 0; i < le32toh(hdr->hdr_entries); i++) {
uuid_create(&uuid, NULL);
le_uuid_enc(&ent[i].ent_uuid, &uuid);
}
/* Mirror partitions. */
for (i = 0; i < 4; i++) {
start = le16toh(mbr->mbr_part[i].part_start_hi);
start = (start << 16) + le16toh(mbr->mbr_part[i].part_start_lo);
size = le16toh(mbr->mbr_part[i].part_size_hi);
size = (size << 16) + le16toh(mbr->mbr_part[i].part_size_lo);
switch (mbr->mbr_part[i].part_typ) {
case 0:
continue;
case 165: { /* FreeBSD */
if (slice) {
uuid_t freebsd = GPT_ENT_TYPE_FREEBSD;
le_uuid_enc(&ent->ent_type, &freebsd);
ent->ent_lba_start = htole64((uint64_t)start);
ent->ent_lba_end = htole64(start + size - 1LL);
unicode16(ent->ent_name,
L"FreeBSD disklabel partition", 36);
ent++;
} else
ent = migrate_disklabel(fd, start, ent);
break;
}
case 239: { /* EFI */
uuid_t efi_slice = GPT_ENT_TYPE_EFI;
le_uuid_enc(&ent->ent_type, &efi_slice);
ent->ent_lba_start = htole64((uint64_t)start);
ent->ent_lba_end = htole64(start + size - 1LL);
unicode16(ent->ent_name, L"EFI system partition", 36);
ent++;
break;
}
default:
warnx("%s: error: unknown partition type (%d)",
device_name, mbr->mbr_part[i].part_typ);
return;
}
}
ent = tbl->map_data;
hdr->hdr_crc_table = htole32(crc32(ent, le32toh(hdr->hdr_entries) *
le32toh(hdr->hdr_entsz)));
hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
gpt_write(fd, gpt);
gpt_write(fd, tbl);
/*
* Create backup GPT.
*/
memcpy(tpg->map_data, gpt->map_data, secsz);
hdr = tpg->map_data;
hdr->hdr_lba_self = htole64(tpg->map_start);
hdr->hdr_lba_alt = htole64(gpt->map_start);
hdr->hdr_lba_table = htole64(lbt->map_start);
hdr->hdr_crc_self = 0; /* Don't ever forget this! */
hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
gpt_write(fd, lbt);
gpt_write(fd, tpg);
map = map_find(MAP_TYPE_MBR);
mbr = map->map_data;
/*
* Turn the MBR into a Protective MBR.
*/
bzero(mbr->mbr_part, sizeof(mbr->mbr_part));
mbr->mbr_part[0].part_shd = 0xff;
mbr->mbr_part[0].part_ssect = 0xff;
mbr->mbr_part[0].part_scyl = 0xff;
mbr->mbr_part[0].part_typ = 0xee;
mbr->mbr_part[0].part_ehd = 0xff;
mbr->mbr_part[0].part_esect = 0xff;
mbr->mbr_part[0].part_ecyl = 0xff;
mbr->mbr_part[0].part_start_lo = htole16(1);
if (last > 0xffffffff) {
mbr->mbr_part[0].part_size_lo = htole16(0xffff);
mbr->mbr_part[0].part_size_hi = htole16(0xffff);
} else {
mbr->mbr_part[0].part_size_lo = htole16(last);
mbr->mbr_part[0].part_size_hi = htole16(last >> 16);
}
gpt_write(fd, map);
}
int
cmd_migrate(int argc, char *argv[])
{
int ch, fd;
/* Get the migrate options */
while ((ch = getopt(argc, argv, "s")) != -1) {
switch(ch) {
case 's':
slice = 1;
break;
default:
usage_migrate();
}
}
if (argc == optind)
usage_migrate();
while (optind < argc) {
fd = gpt_open(argv[optind++]);
if (fd == -1) {
warn("unable to open device '%s'", device_name);
continue;
}
migrate(fd);
gpt_close(fd);
}
return (0);
}
|