2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
31 #include "libvolume_id.h"
32 #include "libvolume_id-private.h"
34 struct swap_header_v1_2 {
35 uint8_t bootbits[1024];
40 uint8_t volume_name[16];
43 #define LARGEST_PAGESIZE 0x10000
45 int volume_id_probe_linux_swap(struct volume_id *id, uint64_t off, uint64_t size)
49 struct swap_header_v1_2 *sw;
51 info("probing at offset 0x%" PRIx64 "\n", off);
53 /* eek, the swap signature is at the end of the PAGE_SIZE */
54 for (page = 0x1000; page <= LARGEST_PAGESIZE; page <<= 1) {
55 buf = volume_id_get_buffer(id, off + page-10, 10);
59 if (memcmp(buf, "SWAP-SPACE", 10) == 0) {
60 strcpy(id->type_version, "1");
64 if (memcmp(buf, "SWAPSPACE2", 10) == 0) {
66 strcpy(id->type_version, "2");
70 if (memcmp(buf, "S1SUSPEND", 9) == 0) {
72 strcpy(id->type_version, "s1suspend");
76 if (memcmp(buf, "ULSUSPEND", 9) == 0) {
78 strcpy(id->type_version, "ulsuspend");
82 if (memcmp(buf, "\xed\xc3\x02\xe9\x98\x56\xe5\x0c", 8) == 0) {
84 strcpy(id->type_version, "tuxonice");
91 sw = (struct swap_header_v1_2 *) volume_id_get_buffer(id, off, sizeof(struct swap_header_v1_2));
93 volume_id_set_label_raw(id, sw->volume_name, 16);
94 volume_id_set_label_string(id, sw->volume_name, 16);
95 volume_id_set_uuid(id, sw->uuid, 0, UUID_DCE);
99 volume_id_set_usage(id, VOLUME_ID_OTHER);
100 /* we think this is swap, but we make sure no other signatures are found */
101 id->force_unique_result = 1;