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/*
* 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_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;
}
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