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 | uint16_t s_isize;
|
---|
28 | uint16_t s_pad0;
|
---|
29 | uint32_t s_fsize;
|
---|
30 | uint16_t s_nfree;
|
---|
31 | uint16_t s_pad1;
|
---|
32 | uint32_t s_free[SYSV_NICFREE];
|
---|
33 | uint16_t s_ninode;
|
---|
34 | uint16_t s_pad2;
|
---|
35 | uint16_t s_inode[SYSV_NICINOD];
|
---|
36 | uint8_t s_flock;
|
---|
37 | uint8_t s_ilock;
|
---|
38 | uint8_t s_fmod;
|
---|
39 | uint8_t s_ronly;
|
---|
40 | uint32_t s_time;
|
---|
41 | uint16_t s_dinfo[4];
|
---|
42 | uint32_t s_tfree;
|
---|
43 | uint16_t s_tinode;
|
---|
44 | uint16_t s_pad3;
|
---|
45 | uint8_t s_fname[6];
|
---|
46 | uint8_t s_fpack[6];
|
---|
47 | uint32_t s_fill[12];
|
---|
48 | uint32_t s_state;
|
---|
49 | uint32_t s_magic;
|
---|
50 | uint32_t s_type;
|
---|
51 | } PACKED;
|
---|
52 |
|
---|
53 | #define XENIX_NICINOD 100
|
---|
54 | #define XENIX_NICFREE 100
|
---|
55 |
|
---|
56 | struct xenix_super {
|
---|
57 | uint16_t s_isize;
|
---|
58 | uint32_t s_fsize;
|
---|
59 | uint16_t s_nfree;
|
---|
60 | uint32_t s_free[XENIX_NICFREE];
|
---|
61 | uint16_t s_ninode;
|
---|
62 | uint16_t s_inode[XENIX_NICINOD];
|
---|
63 | uint8_t s_flock;
|
---|
64 | uint8_t s_ilock;
|
---|
65 | uint8_t s_fmod;
|
---|
66 | uint8_t s_ronly;
|
---|
67 | uint32_t s_time;
|
---|
68 | uint32_t s_tfree;
|
---|
69 | uint16_t s_tinode;
|
---|
70 | uint16_t s_dinfo[4];
|
---|
71 | uint8_t s_fname[6];
|
---|
72 | uint8_t s_fpack[6];
|
---|
73 | uint8_t s_clean;
|
---|
74 | uint8_t s_fill[371];
|
---|
75 | uint32_t s_magic;
|
---|
76 | uint32_t s_type;
|
---|
77 | } PACKED;
|
---|
78 |
|
---|
79 | #define SYSV_SUPERBLOCK_BLOCK 0x01
|
---|
80 | #define SYSV_MAGIC 0xfd187e20
|
---|
81 | #define XENIX_SUPERBLOCK_BLOCK 0x18
|
---|
82 | #define XENIX_MAGIC 0x2b5544
|
---|
83 | #define SYSV_MAX_BLOCKSIZE 0x800
|
---|
84 |
|
---|
85 | int FAST_FUNC volume_id_probe_sysv(struct volume_id *id /*,uint64_t off*/)
|
---|
86 | {
|
---|
87 | #define off ((uint64_t)0)
|
---|
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 | }
|
---|