1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/* GRUB compatibility header */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2003 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <fs/vfs.h>
/* This disables some portion of code */
#define STAGE1_5 1
static inline int
substring (const char *s1, const char *s2)
{
while (*s1 == *s2)
{
/* The strings match exactly. */
if (! *(s1++))
return 0;
s2 ++;
}
/* S1 is a substring of S2. */
if (*s1 == 0)
return -1;
/* S1 isn't a substring. */
return 1;
}
#define MAXINT 0x7fffffff
/* This is only used by fsys_* to determine if it's hard disk. If it is,
* they try to guess filesystem type by partition type. I guess it is
* not necessory, so hardcoded to 0 (first floppy) --ts1 */
#define current_drive 0
/* Ditto */
#define current_slice 0
extern unsigned long part_start;
extern unsigned long part_length;
extern int filepos;
extern int filemax;
extern int fsmax;
/* Error codes (descriptions are in common.c) */
typedef enum
{
ERR_NONE = 0,
ERR_BAD_FILENAME,
ERR_BAD_FILETYPE,
ERR_BAD_GZIP_DATA,
ERR_BAD_GZIP_HEADER,
ERR_BAD_PART_TABLE,
ERR_BAD_VERSION,
ERR_BELOW_1MB,
ERR_BOOT_COMMAND,
ERR_BOOT_FAILURE,
ERR_BOOT_FEATURES,
ERR_DEV_FORMAT,
ERR_DEV_VALUES,
ERR_EXEC_FORMAT,
ERR_FILELENGTH,
ERR_FILE_NOT_FOUND,
ERR_FSYS_CORRUPT,
ERR_FSYS_MOUNT,
ERR_GEOM,
ERR_NEED_LX_KERNEL,
ERR_NEED_MB_KERNEL,
ERR_NO_DISK,
ERR_NO_PART,
ERR_NUMBER_PARSING,
ERR_OUTSIDE_PART,
ERR_READ,
ERR_SYMLINK_LOOP,
ERR_UNRECOGNIZED,
ERR_WONT_FIT,
ERR_WRITE,
ERR_BAD_ARGUMENT,
ERR_UNALIGNED,
ERR_PRIVILEGED,
ERR_DEV_NEED_INIT,
ERR_NO_DISK_SPACE,
ERR_NUMBER_OVERFLOW,
MAX_ERR_NUM
} fs_error_t;
extern fs_error_t errnum;
/* instrumentation variables */
/* (Not used in FILO) */
extern void (*disk_read_hook) (int, int, int);
extern void (*disk_read_func) (int, int, int);
#define FSYS_BUFLEN 0x8000
extern char FSYS_BUF[FSYS_BUFLEN];
#define print_possibilities 0
#define SECTOR_SIZE 512
#define SECTOR_BITS 9
#ifdef CONFIG_FS_FAT
int fat_mount (void);
int fat_read (char *buf, int len);
int fat_dir (char *dirname);
#endif
#if CONFIG_FS_EXT2 == 1
int ext2fs_mount (void);
int ext2fs_read (char *buf, int len);
int ext2fs_dir (char *dirname);
#endif
#ifdef CONFIG_FS_MINIX
int minix_mount (void);
int minix_read (char *buf, int len);
int minix_dir (char *dirname);
#endif
#ifdef CONFIG_FS_REISERFS
int reiserfs_mount (void);
int reiserfs_read (char *buf, int len);
int reiserfs_dir (char *dirname);
int reiserfs_embed (int *start_sector, int needed_sectors);
#endif
#ifdef CONFIG_FS_JFS
int jfs_mount (void);
int jfs_read (char *buf, int len);
int jfs_dir (char *dirname);
int jfs_embed (int *start_sector, int needed_sectors);
#endif
#ifdef CONFIG_FS_XFS
int xfs_mount (void);
int xfs_read (char *buf, int len);
int xfs_dir (char *dirname);
#endif
#if CONFIG_FS_ISO9660 == 1
int iso9660_mount (void);
int iso9660_read (char *buf, int len);
int iso9660_dir (char *dirname);
#endif
/* This is not a flag actually, but used as if it were a flag. */
#define PC_SLICE_TYPE_HIDDEN_FLAG 0x10
#define PC_SLICE_TYPE_NONE 0
#define PC_SLICE_TYPE_FAT12 1
#define PC_SLICE_TYPE_FAT16_LT32M 4
#define PC_SLICE_TYPE_EXTENDED 5
#define PC_SLICE_TYPE_FAT16_GT32M 6
#define PC_SLICE_TYPE_FAT32 0xb
#define PC_SLICE_TYPE_FAT32_LBA 0xc
#define PC_SLICE_TYPE_FAT16_LBA 0xe
#define PC_SLICE_TYPE_WIN95_EXTENDED 0xf
#define PC_SLICE_TYPE_EZD 0x55
#define PC_SLICE_TYPE_MINIX 0x80
#define PC_SLICE_TYPE_LINUX_MINIX 0x81
#define PC_SLICE_TYPE_EXT2FS 0x83
#define PC_SLICE_TYPE_LINUX_EXTENDED 0x85
#define PC_SLICE_TYPE_VSTAFS 0x9e
#define PC_SLICE_TYPE_DELL_UTIL 0xde
#define PC_SLICE_TYPE_LINUX_RAID 0xfd
/* For convinience. */
/* Check if TYPE is a FAT partition type. Clear the hidden flag before
the check, to allow the user to mount a hidden partition in GRUB. */
#define IS_PC_SLICE_TYPE_FAT(type) \
({ int _type = (type) & ~PC_SLICE_TYPE_HIDDEN_FLAG; \
_type == PC_SLICE_TYPE_FAT12 \
|| _type == PC_SLICE_TYPE_FAT16_LT32M \
|| _type == PC_SLICE_TYPE_FAT16_GT32M \
|| _type == PC_SLICE_TYPE_FAT16_LBA \
|| _type == PC_SLICE_TYPE_FAT32 \
|| _type == PC_SLICE_TYPE_FAT32_LBA \
|| _type == PC_SLICE_TYPE_DELL_UTIL; })
#define IS_PC_SLICE_TYPE_MINIX(type) \
(((type) == PC_SLICE_TYPE_MINIX) \
|| ((type) == PC_SLICE_TYPE_LINUX_MINIX))
#define IS_PC_SLICE_TYPE_BSD_WITH_FS(type,fs) 0
/* possible values for the *BSD-style partition type */
#define FS_UNUSED 0 /* unused */
#define FS_SWAP 1 /* swap */
#define FS_V6 2 /* Sixth Edition */
#define FS_V7 3 /* Seventh Edition */
#define FS_SYSV 4 /* System V */
#define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
#define FS_V8 6 /* Eighth Edition, 4K blocks */
#define FS_BSDFFS 7 /* 4.2BSD fast file system */
#define FS_MSDOS 8 /* MSDOS file system */
#define FS_BSDLFS 9 /* 4.4BSD log-structured file system */
#define FS_OTHER 10 /* in use, but unknown/unsupported */
#define FS_HPFS 11 /* OS/2 high-performance file system */
#define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */
#define FS_BOOT 13 /* partition contains bootstrap */
#define FS_ADOS 14 /* AmigaDOS fast file system */
#define FS_HFS 15 /* Macintosh HFS */
#define FS_FILECORE 16 /* Acorn Filecore Filing System */
#define FS_EXT2FS 17 /* Linux Extended 2 file system */
|
