Contents of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/sysv.c
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 3289 byte(s)
-updated to busybox-1.13.4
1 | /* |
2 | * volume_id - reads filesystem label and uuid |
3 | * |
4 | * Copyright (C) 2005 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 | #define SYSV_NICINOD 100 |
24 | #define SYSV_NICFREE 50 |
25 | |
26 | struct sysv_super |
27 | { |
28 | uint16_t s_isize; |
29 | uint16_t s_pad0; |
30 | uint32_t s_fsize; |
31 | uint16_t s_nfree; |
32 | uint16_t s_pad1; |
33 | uint32_t s_free[SYSV_NICFREE]; |
34 | uint16_t s_ninode; |
35 | uint16_t s_pad2; |
36 | uint16_t s_inode[SYSV_NICINOD]; |
37 | uint8_t s_flock; |
38 | uint8_t s_ilock; |
39 | uint8_t s_fmod; |
40 | uint8_t s_ronly; |
41 | uint32_t s_time; |
42 | uint16_t s_dinfo[4]; |
43 | uint32_t s_tfree; |
44 | uint16_t s_tinode; |
45 | uint16_t s_pad3; |
46 | uint8_t s_fname[6]; |
47 | uint8_t s_fpack[6]; |
48 | uint32_t s_fill[12]; |
49 | uint32_t s_state; |
50 | uint32_t s_magic; |
51 | uint32_t s_type; |
52 | } __attribute__((__packed__)); |
53 | |
54 | #define XENIX_NICINOD 100 |
55 | #define XENIX_NICFREE 100 |
56 | |
57 | struct xenix_super { |
58 | uint16_t s_isize; |
59 | uint32_t s_fsize; |
60 | uint16_t s_nfree; |
61 | uint32_t s_free[XENIX_NICFREE]; |
62 | uint16_t s_ninode; |
63 | uint16_t s_inode[XENIX_NICINOD]; |
64 | uint8_t s_flock; |
65 | uint8_t s_ilock; |
66 | uint8_t s_fmod; |
67 | uint8_t s_ronly; |
68 | uint32_t s_time; |
69 | uint32_t s_tfree; |
70 | uint16_t s_tinode; |
71 | uint16_t s_dinfo[4]; |
72 | uint8_t s_fname[6]; |
73 | uint8_t s_fpack[6]; |
74 | uint8_t s_clean; |
75 | uint8_t s_fill[371]; |
76 | uint32_t s_magic; |
77 | uint32_t s_type; |
78 | } __attribute__((__packed__)); |
79 | |
80 | #define SYSV_SUPERBLOCK_BLOCK 0x01 |
81 | #define SYSV_MAGIC 0xfd187e20 |
82 | #define XENIX_SUPERBLOCK_BLOCK 0x18 |
83 | #define XENIX_MAGIC 0x2b5544 |
84 | #define SYSV_MAX_BLOCKSIZE 0x800 |
85 | |
86 | int volume_id_probe_sysv(struct volume_id *id, uint64_t off) |
87 | { |
88 | struct sysv_super *vs; |
89 | struct xenix_super *xs; |
90 | unsigned boff; |
91 | |
92 | dbg("probing at offset 0x%llx", (unsigned long long) off); |
93 | |
94 | for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) { |
95 | vs = volume_id_get_buffer(id, off + (boff * SYSV_SUPERBLOCK_BLOCK), 0x200); |
96 | if (vs == NULL) |
97 | return -1; |
98 | |
99 | if (vs->s_magic == cpu_to_le32(SYSV_MAGIC) || vs->s_magic == cpu_to_be32(SYSV_MAGIC)) { |
100 | // volume_id_set_label_raw(id, vs->s_fname, 6); |
101 | volume_id_set_label_string(id, vs->s_fname, 6); |
102 | // id->type = "sysv"; |
103 | goto found; |
104 | } |
105 | } |
106 | |
107 | for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) { |
108 | xs = volume_id_get_buffer(id, off + (boff + XENIX_SUPERBLOCK_BLOCK), 0x200); |
109 | if (xs == NULL) |
110 | return -1; |
111 | |
112 | if (xs->s_magic == cpu_to_le32(XENIX_MAGIC) || xs->s_magic == cpu_to_be32(XENIX_MAGIC)) { |
113 | // volume_id_set_label_raw(id, xs->s_fname, 6); |
114 | volume_id_set_label_string(id, xs->s_fname, 6); |
115 | // id->type = "xenix"; |
116 | goto found; |
117 | } |
118 | } |
119 | |
120 | return -1; |
121 | |
122 | found: |
123 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); |
124 | return 0; |
125 | } |