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/*
* Copyright (c) International Business Machines Corp., 2006
*
* 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.
*/
/*
* An utility to resize UBI volumes.
*
* Authors: Artem Bityutskiy <dedekind@infradead.org>
* Frank Haverkamp <haver@vnet.ibm.com>
*/
#define PROGRAM_NAME "ubirsvol"
#include <stdio.h>
#include <stdint.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <libubi.h>
#include "common.h"
/* The variables below are set by command line arguments */
struct args {
int vol_id;
const char *node;
const char *name;
long long bytes;
int lebs;
};
static struct args args = {
.vol_id = -1,
.bytes = -1,
.lebs = -1,
};
static const char doc[] = PROGRAM_NAME " version " VERSION
" - a tool to resize UBI volumes.";
static const char optionsstr[] =
"-n, --vol_id=<volume id> volume ID to resize\n"
"-N, --name=<volume name> volume name to resize\n"
"-s, --size=<bytes> volume size volume size in bytes, kilobytes (KiB)\n"
" or megabytes (MiB)\n"
"-S, --lebs=<LEBs count> alternative way to give volume size in logical\n"
" eraseblocks\n"
"-h, -?, --help print help message\n"
"-V, --version print program version";
static const char usage[] =
"Usage: " PROGRAM_NAME " <UBI device node file name> [-n <volume id>] [--vol_id=<volume id>]\n\n"
" [-N <volume name>] [--name=<volume name>] [-s <bytes>] [-S <LEBs>] [-h] [--help]\n\n"
"Example: " PROGRAM_NAME " /dev/ubi0 -n 1 -s 1MiB resize UBI volume 1 to 1 MiB on\n"
" UBI device corresponding to /dev/ubi0\n"
" " PROGRAM_NAME " /dev/ubi0 -N my_vol -s 1MiB - resize UBI volume named \"my_vol\" to 1 MiB\n"
" on UBI device corresponding to /dev/ubi0";
static const struct option long_options[] = {
{ .name = "vol_id", .has_arg = 1, .flag = NULL, .val = 'n' },
{ .name = "name", .has_arg = 1, .flag = NULL, .val = 'N' },
{ .name = "help", .has_arg = 0, .flag = NULL, .val = 'h' },
{ .name = "version", .has_arg = 0, .flag = NULL, .val = 'V' },
{ .name = "size", .has_arg = 1, .flag = NULL, .val = 's' },
{ .name = "lebs", .has_arg = 1, .flag = NULL, .val = 'S' },
{ NULL, 0, NULL, 0},
};
static int param_sanity_check(void)
{
if (args.vol_id == -1 && !args.name) {
errmsg("please, specify either volume ID or volume name");
return -1;
}
if (args.vol_id != -1 && args.name) {
errmsg("please, specify either volume ID or volume name, not both");
return -1;
}
if (args.bytes == -1 && args.lebs == -1)
return errmsg("volume size was not specified (use -h for help)");
if (args.bytes != -1 && args.lebs != -1)
return errmsg("size specified with more then one option");
return 0;
}
static int parse_opt(int argc, char * const argv[])
{
while (1) {
int key, error = 0;
key = getopt_long(argc, argv, "s:S:n:N:h?V", long_options, NULL);
if (key == -1)
break;
switch (key) {
case 's':
args.bytes = util_get_bytes(optarg);
if (args.bytes <= 0)
return errmsg("bad volume size: \"%s\"", optarg);
break;
case 'S':
args.lebs = simple_strtoull(optarg, &error);
if (error || args.lebs <= 0)
return errmsg("bad LEB count: \"%s\"", optarg);
break;
case 'n':
args.vol_id = simple_strtoul(optarg, &error);
if (error || args.vol_id < 0) {
errmsg("bad volume ID: " "\"%s\"", optarg);
return -1;
}
break;
case 'N':
args.name = optarg;
break;
case 'h':
printf("%s\n\n", doc);
printf("%s\n\n", usage);
printf("%s\n", optionsstr);
exit(EXIT_SUCCESS);
case '?':
printf("%s\n\n", doc);
printf("%s\n\n", usage);
printf("%s\n", optionsstr);
return -1;
case 'V':
common_print_version();
exit(EXIT_SUCCESS);
case ':':
errmsg("parameter is missing");
return -1;
default:
fprintf(stderr, "Use -h for help\n");
return -1;
}
}
if (optind == argc) {
errmsg("UBI device name was not specified (use -h for help)");
return -1;
} else if (optind != argc - 1) {
errmsg("more then one UBI device specified (use -h for help)");
return -1;
}
args.node = argv[optind];
if (param_sanity_check())
return -1;
return 0;
}
int main(int argc, char * const argv[])
{
int err;
libubi_t libubi;
struct ubi_dev_info dev_info;
struct ubi_vol_info vol_info;
err = parse_opt(argc, argv);
if (err)
return -1;
libubi = libubi_open();
if (!libubi)
return sys_errmsg("cannot open libubi");
err = ubi_probe_node(libubi, args.node);
if (err == 2) {
errmsg("\"%s\" is an UBI volume node, not an UBI device node",
args.node);
goto out_libubi;
} else if (err < 0) {
if (errno == ENODEV)
errmsg("\"%s\" is not an UBI device node", args.node);
else
sys_errmsg("error while probing \"%s\"", args.node);
}
err = ubi_get_dev_info(libubi, args.node, &dev_info);
if (err) {
sys_errmsg("cannot get information about UBI device \"%s\"",
args.node);
goto out_libubi;
}
if (args.name) {
err = ubi_get_vol_info1_nm(libubi, dev_info.dev_num,
args.name, &vol_info);
if (err) {
sys_errmsg("cannot find UBI volume \"%s\"", args.name);
goto out_libubi;
}
args.vol_id = vol_info.vol_id;
} else {
err = ubi_get_vol_info1(libubi, dev_info.dev_num,
args.vol_id, &vol_info);
if (err) {
sys_errmsg("cannot find UBI volume ID %d", args.vol_id);
goto out_libubi;
}
}
if (args.lebs != -1)
args.bytes = vol_info.leb_size * args.lebs;
err = ubi_rsvol(libubi, args.node, args.vol_id, args.bytes);
if (err) {
sys_errmsg("cannot UBI resize volume");
goto out_libubi;
}
libubi_close(libubi);
return 0;
out_libubi:
libubi_close(libubi);
return -1;
}
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