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
|
/*
* Copyright (C) 2008 Logitech.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* 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., 51
* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* An utility to get rename UBI volumes.
*
* Author: Richard Titmuss
*/
#define PROGRAM_VERSION "1.0"
#define PROGRAM_NAME "ubirename"
#include <stdio.h>
#include <stdint.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <libubi.h>
#include "common.h"
static const char usage[] =
"Usage: " PROGRAM_NAME " <UBI device node file name> [<old name> <new name>|...]\n\n"
"Example: " PROGRAM_NAME "/dev/ubi0 A B C D - rename volume A to B, and C to D\n\n"
"This utility allows re-naming several volumes in one go atomically.\n"
"For example, if you have volumes A and B, then you may rename A into B\n"
"and B into A at one go, and the operation will be atomic. This allows\n"
"implementing atomic UBI volumes upgrades. E.g., if you have volume A\n"
"and want to upgrade it atomically, you create a temporary volume B,\n"
"put your new data to B, then rename A to B and B to A, and then you\n"
"may remove old volume B.\n"
"It is also allowed to re-name multiple volumes at a time, but 16 max.\n"
"renames at once, which means you may specify up to 32 volume names.\n"
"If you have volumes A and B, and re-name A to B, bud do not re-name\n"
"B to something else in the same request, old volume B will be removed\n"
"and A will be renamed into B.\n";
static int get_vol_id(libubi_t libubi, struct ubi_dev_info *dev_info,
char *name)
{
int err, i;
struct ubi_vol_info vol_info;
for (i=dev_info->lowest_vol_id; i<=dev_info->highest_vol_id; i++) {
err = ubi_get_vol_info1(libubi, dev_info->dev_num, i, &vol_info);
if (err == -1) {
if (errno == ENOENT)
continue;
return -1;
}
if (strcmp(name, vol_info.name) == 0)
return vol_info.vol_id;
}
return -1;
}
int main(int argc, char * const argv[])
{
int i, err;
int count = 0;
libubi_t libubi;
struct ubi_dev_info dev_info;
struct ubi_rnvol_req rnvol;
const char *node;
if (argc < 3 || (argc & 1) == 1) {
errmsg("too few arguments");
fprintf(stderr, "%s\n", usage);
return -1;
}
if (argc > UBI_MAX_RNVOL + 2) {
errmsg("too many volumes to re-name, max. is %d",
UBI_MAX_RNVOL);
return -1;
}
node = argv[1];
libubi = libubi_open();
if (!libubi) {
if (errno == 0)
return errmsg("UBI is not present in the system");
return sys_errmsg("cannot open libubi");
}
err = ubi_probe_node(libubi, node);
if (err == 2) {
errmsg("\"%s\" is an UBI volume node, not an UBI device node",
node);
goto out_libubi;
} else if (err < 0) {
if (errno == ENODEV)
errmsg("\"%s\" is not an UBI device node", node);
else
sys_errmsg("error while probing \"%s\"", node);
goto out_libubi;
}
err = ubi_get_dev_info(libubi, node, &dev_info);
if (err == -1) {
sys_errmsg("cannot get information about UBI device \"%s\"", node);
goto out_libubi;
}
for (i = 2; i < argc; i += 2) {
err = get_vol_id(libubi, &dev_info, argv[i]);
if (err == -1) {
errmsg("\"%s\" volume not found", argv[i]);
goto out_libubi;
}
rnvol.ents[count].vol_id = err;
rnvol.ents[count].name_len = strlen(argv[i + 1]);
strcpy(rnvol.ents[count++].name, argv[i + 1]);
}
rnvol.count = count;
err = ubi_rnvols(libubi, node, &rnvol);
if (err == -1) {
sys_errmsg("cannot rename volumes");
goto out_libubi;
}
libubi_close(libubi);
return 0;
out_libubi:
libubi_close(libubi);
return -1;
}
|
