Annotation of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/linux_swap.c
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
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File size: 2303 byte(s)
Sun May 30 11:32:42 2010 UTC (14 years 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 | niro | 816 | /* |
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 | niro | 984 | } PACKED; |
31 | niro | 816 | |
32 | #define LARGEST_PAGESIZE 0x4000 | ||
33 | |||
34 | niro | 984 | int FAST_FUNC volume_id_probe_linux_swap(struct volume_id *id /*,uint64_t off*/) |
35 | niro | 816 | { |
36 | niro | 984 | #define off ((uint64_t)0) |
37 | niro | 816 | 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 | niro | 984 | 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 | niro | 816 | 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 | } |