Contents of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/linux_swap.c
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 2303 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* |
2 | * volume_id - reads filesystem label and uuid |
3 | * |
4 | * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org> |
5 | * |
6 | * This library is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Lesser General Public |
8 | * License as published by the Free Software Foundation; either |
9 | * version 2.1 of the License, or (at your option) any later version. |
10 | * |
11 | * This library 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 GNU |
14 | * Lesser General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU Lesser General Public |
17 | * License along with this library; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | #include "volume_id_internal.h" |
22 | |
23 | struct swap_header_v1_2 { |
24 | uint8_t bootbits[1024]; |
25 | uint32_t version; |
26 | uint32_t last_page; |
27 | uint32_t nr_badpages; |
28 | uint8_t uuid[16]; |
29 | uint8_t volume_name[16]; |
30 | } PACKED; |
31 | |
32 | #define LARGEST_PAGESIZE 0x4000 |
33 | |
34 | int FAST_FUNC volume_id_probe_linux_swap(struct volume_id *id /*,uint64_t off*/) |
35 | { |
36 | #define off ((uint64_t)0) |
37 | struct swap_header_v1_2 *sw; |
38 | const uint8_t *buf; |
39 | unsigned page; |
40 | |
41 | dbg("probing at offset 0x%llx", (unsigned long long) off); |
42 | |
43 | /* the swap signature is at the end of the PAGE_SIZE */ |
44 | for (page = 0x1000; page <= LARGEST_PAGESIZE; page <<= 1) { |
45 | buf = volume_id_get_buffer(id, off + page-10, 10); |
46 | if (buf == NULL) |
47 | return -1; |
48 | |
49 | if (memcmp(buf, "SWAP-SPACE", 10) == 0) { |
50 | // id->type_version[0] = '1'; |
51 | // id->type_version[1] = '\0'; |
52 | goto found; |
53 | } |
54 | |
55 | if (memcmp(buf, "SWAPSPACE2", 10) == 0 |
56 | || memcmp(buf, "S1SUSPEND", 9) == 0 |
57 | || memcmp(buf, "S2SUSPEND", 9) == 0 |
58 | || memcmp(buf, "ULSUSPEND", 9) == 0 |
59 | ) { |
60 | sw = volume_id_get_buffer(id, off, sizeof(struct swap_header_v1_2)); |
61 | if (sw == NULL) |
62 | return -1; |
63 | // id->type_version[0] = '2'; |
64 | // id->type_version[1] = '\0'; |
65 | // volume_id_set_label_raw(id, sw->volume_name, 16); |
66 | volume_id_set_label_string(id, sw->volume_name, 16); |
67 | volume_id_set_uuid(id, sw->uuid, UUID_DCE); |
68 | goto found; |
69 | } |
70 | } |
71 | return -1; |
72 | |
73 | found: |
74 | // volume_id_set_usage(id, VOLUME_ID_OTHER); |
75 | // id->type = "swap"; |
76 | |
77 | return 0; |
78 | } |