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
|
/*
* Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <ext4_config.h>
#include <ext4_blockdev.h>
#include <ext4_errno.h>
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#ifdef WIN32
#include <windows.h>
#include <winioctl.h>
/**@brief Default filename.*/
static const char *fname = "ext2";
/**@brief If part_length == 0 this is the offset (in bytes) of the partition to write to */
static uint64_t part_offset = 0;
/**@brief Size (in bytes) of the partition to write to, or 0 to use the whole disk */
static uint64_t part_size = 0;
/**@brief IO block size.*/
#define EXT4_IORAW_BSIZE 512
/**@brief Image file descriptor.*/
static HANDLE dev_file;
/**********************BLOCKDEV INTERFACE**************************************/
static int file_open(struct ext4_blockdev *bdev);
static int file_bread(struct ext4_blockdev *bdev, void *buf, uint64_t blk_id,
uint32_t blk_cnt);
static int file_bwrite(struct ext4_blockdev *bdev, const void *buf,
uint64_t blk_id, uint32_t blk_cnt);
static int file_close(struct ext4_blockdev *bdev);
/******************************************************************************/
EXT4_BLOCKDEV_STATIC_INSTANCE(_filedev, EXT4_IORAW_BSIZE, 0, file_open,
file_bread, file_bwrite, file_close, 0, 0);
/******************************************************************************/
static int file_open(struct ext4_blockdev *bdev)
{
char path[64];
DISK_GEOMETRY_EX pdg;
uint64_t disk_size;
BOOL bResult = FALSE;
DWORD junk;
sprintf(path, "\\\\.\\%s", fname);
dev_file =
CreateFile(path, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_WRITE | FILE_SHARE_READ, NULL, OPEN_EXISTING,
FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH, NULL);
if (dev_file == INVALID_HANDLE_VALUE) {
return EIO;
}
bResult =
DeviceIoControl(dev_file, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX, NULL, 0,
&pdg, sizeof(pdg), &junk, (LPOVERLAPPED)NULL);
if (bResult == FALSE) {
CloseHandle(dev_file);
return EIO;
}
_filedev.bdif->ph_bsize = pdg.Geometry.BytesPerSector;
if (part_size == 0) {
/* whole disk */
_filedev.bdif->ph_bcnt = pdg.DiskSize.QuadPart / pdg.Geometry.BytesPerSector;
_filedev.part_offset = 0;
_filedev.part_size = pdg.DiskSize.QuadPart;
} else {
/* specified partition */
_filedev.bdif->ph_bcnt = part_size / pdg.Geometry.BytesPerSector;
_filedev.part_offset = part_offset;
_filedev.part_size = part_size;
}
return EOK;
}
/******************************************************************************/
static int file_bread(struct ext4_blockdev *bdev, void *buf, uint64_t blk_id,
uint32_t blk_cnt)
{
long hipart = blk_id >> (32 - 9);
long lopart = blk_id << 9;
long err;
SetLastError(0);
lopart = SetFilePointer(dev_file, lopart, &hipart, FILE_BEGIN);
if (lopart == -1 && NO_ERROR != (err = GetLastError())) {
return EIO;
}
DWORD n;
if (!ReadFile(dev_file, buf, blk_cnt * 512, &n, NULL)) {
err = GetLastError();
return EIO;
}
return EOK;
}
/******************************************************************************/
static int file_bwrite(struct ext4_blockdev *bdev, const void *buf,
uint64_t blk_id, uint32_t blk_cnt)
{
long hipart = blk_id >> (32 - 9);
long lopart = blk_id << 9;
long err;
SetLastError(0);
lopart = SetFilePointer(dev_file, lopart, &hipart, FILE_BEGIN);
if (lopart == -1 && NO_ERROR != (err = GetLastError())) {
return EIO;
}
DWORD n;
if (!WriteFile(dev_file, buf, blk_cnt * 512, &n, NULL)) {
err = GetLastError();
return EIO;
}
return EOK;
}
/******************************************************************************/
static int file_close(struct ext4_blockdev *bdev)
{
CloseHandle(dev_file);
return EOK;
}
/******************************************************************************/
struct ext4_blockdev *file_windows_dev_get(void)
{
return &_filedev;
}
/******************************************************************************/
void file_windows_name_set(const char *n)
{
fname = n;
}
/******************************************************************************/
void file_windows_partition_set(uint64_t offset, uint64_t size)
{
part_offset = offset;
part_size = size;
}
#endif
|
