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
|
/*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Include output from configure */
#include <config.h>
#include <fsimage_plugin.h>
#include INCLUDE_EXTFS_H
#include <errno.h>
#include <inttypes.h>
static int
ext2lib_mount(fsi_t *fsi, const char *name, const char *options)
{
int err;
char opts[30] = "";
ext2_filsys *fs;
uint64_t offset = fsip_fs_offset(fsi);
if (offset)
snprintf(opts, 29, "offset=%" PRId64, offset);
fs = malloc(sizeof (*fs));
if (fs == NULL)
return (-1);
err = ext2fs_open2(name, opts, 0, 0, 0, unix_io_manager, fs);
if (err != 0) {
free(fs);
errno = EINVAL;
return (-1);
}
fsip_fs_set_data(fsi, fs);
return (0);
}
static int
ext2lib_umount(fsi_t *fsi)
{
ext2_filsys *fs = fsip_fs_data(fsi);
if (ext2fs_close(*fs) != 0) {
free(fs);
errno = EINVAL;
return (-1);
}
free(fs);
return (0);
}
fsi_file_t *
ext2lib_open(fsi_t *fsi, const char *path)
{
ext2_ino_t ino;
ext2_filsys *fs = fsip_fs_data(fsi);
ext2_file_t *f;
fsi_file_t *file;
int err;
err = ext2fs_namei_follow(*fs, EXT2_ROOT_INO, EXT2_ROOT_INO,
path, &ino);
if (err != 0) {
errno = ENOENT;
return (NULL);
}
f = malloc(sizeof (*f));
if (f == NULL)
return (NULL);
err = ext2fs_file_open(*fs, ino, 0, f);
if (err != 0) {
free(f);
errno = EINVAL;
return (NULL);
}
file = fsip_file_alloc(fsi, f);
if (file == NULL)
free(f);
return (file);
}
ssize_t
ext2lib_read(fsi_file_t *file, void *buf, size_t nbytes)
{
ext2_file_t *f = fsip_file_data(file);
unsigned int n;
int err;
err = ext2fs_file_read(*f, buf, nbytes, &n);
if (err != 0) {
errno = EINVAL;
return (-1);
}
return (n);
}
ssize_t
ext2lib_pread(fsi_file_t *file, void *buf, size_t nbytes, uint64_t off)
{
ext2_file_t *f = fsip_file_data(file);
__u64 tmpoff;
unsigned int n;
int err;
if ((err = ext2fs_file_llseek(*f, 0, EXT2_SEEK_CUR, &tmpoff)) != 0) {
errno = EINVAL;
return (-1);
}
if ((err = ext2fs_file_llseek(*f, off, EXT2_SEEK_SET, NULL)) != 0) {
errno = EINVAL;
return (-1);
}
err = ext2fs_file_read(*f, buf, nbytes, &n);
ext2fs_file_llseek(*f, tmpoff, EXT2_SEEK_SET, NULL);
if (err != 0) {
errno = EINVAL;
return (-1);
}
return (n);
}
int
ext2lib_close(fsi_file_t *file)
{
ext2_file_t *f = fsip_file_data(file);
ext2fs_file_close(*f);
free(f);
return (0);
}
fsi_plugin_ops_t *
fsi_init_plugin(int version, fsi_plugin_t *fp, const char **name)
{
static fsi_plugin_ops_t ops = {
FSIMAGE_PLUGIN_VERSION,
.fpo_mount = ext2lib_mount,
.fpo_umount = ext2lib_umount,
.fpo_open = ext2lib_open,
.fpo_read = ext2lib_read,
.fpo_pread = ext2lib_pread,
.fpo_close = ext2lib_close
};
*name = "ext2fs-lib";
return (&ops);
}
|
