245 lines
6.1 KiB
C
245 lines
6.1 KiB
C
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/*
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* Copyright (c) International Business Machines Corp., 2006
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* An utility to resize UBI volumes.
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*
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* Authors: Artem Bityutskiy <dedekind@infradead.org>
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* Frank Haverkamp <haver@vnet.ibm.com>
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*/
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#define PROGRAM_NAME "ubirsvol"
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#include <stdio.h>
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#include <stdint.h>
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#include <getopt.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libubi.h>
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#include "common.h"
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#include "ubiutils-common.h"
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/* The variables below are set by command line arguments */
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struct args {
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int vol_id;
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const char *node;
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const char *name;
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long long bytes;
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int lebs;
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};
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static struct args args = {
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.vol_id = -1,
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.bytes = -1,
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.lebs = -1,
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};
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static const char doc[] = PROGRAM_NAME " version " VERSION
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" - a tool to resize UBI volumes.";
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static const char optionsstr[] =
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"-n, --vol_id=<volume id> volume ID to resize\n"
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"-N, --name=<volume name> volume name to resize\n"
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"-s, --size=<bytes> volume size volume size in bytes, kilobytes (KiB)\n"
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" or megabytes (MiB)\n"
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"-S, --lebs=<LEBs count> alternative way to give volume size in logical\n"
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" eraseblocks\n"
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"-h, -?, --help print help message\n"
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"-V, --version print program version";
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static const char usage[] =
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"Usage: " PROGRAM_NAME " <UBI device node file name> [-n <volume id>] [--vol_id=<volume id>]\n\n"
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" [-N <volume name>] [--name=<volume name>] [-s <bytes>] [-S <LEBs>] [-h] [--help]\n\n"
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"Example: " PROGRAM_NAME " /dev/ubi0 -n 1 -s 1MiB resize UBI volume 1 to 1 MiB on\n"
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" UBI device corresponding to /dev/ubi0\n"
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" " PROGRAM_NAME " /dev/ubi0 -N my_vol -s 1MiB - resize UBI volume named \"my_vol\" to 1 MiB\n"
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" on UBI device corresponding to /dev/ubi0";
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static const struct option long_options[] = {
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{ .name = "vol_id", .has_arg = 1, .flag = NULL, .val = 'n' },
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{ .name = "name", .has_arg = 1, .flag = NULL, .val = 'N' },
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{ .name = "help", .has_arg = 0, .flag = NULL, .val = 'h' },
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{ .name = "version", .has_arg = 0, .flag = NULL, .val = 'V' },
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{ .name = "size", .has_arg = 1, .flag = NULL, .val = 's' },
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{ .name = "lebs", .has_arg = 1, .flag = NULL, .val = 'S' },
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{ NULL, 0, NULL, 0},
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};
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static int param_sanity_check(void)
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{
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if (args.vol_id == -1 && !args.name) {
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errmsg("please, specify either volume ID or volume name");
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return -1;
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}
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if (args.vol_id != -1 && args.name) {
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errmsg("please, specify either volume ID or volume name, not both");
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return -1;
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}
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if (args.bytes == -1 && args.lebs == -1)
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return errmsg("volume size was not specified (use -h for help)");
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if (args.bytes != -1 && args.lebs != -1)
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return errmsg("size specified with more then one option");
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return 0;
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}
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static int parse_opt(int argc, char * const argv[])
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{
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while (1) {
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int key, error = 0;
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key = getopt_long(argc, argv, "s:S:n:N:h?V", long_options, NULL);
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if (key == -1)
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break;
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switch (key) {
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case 's':
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args.bytes = ubiutils_get_bytes(optarg);
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if (args.bytes <= 0)
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return errmsg("bad volume size: \"%s\"", optarg);
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break;
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case 'S':
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args.lebs = simple_strtoull(optarg, &error);
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if (error || args.lebs <= 0)
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return errmsg("bad LEB count: \"%s\"", optarg);
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break;
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case 'n':
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args.vol_id = simple_strtoul(optarg, &error);
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if (error || args.vol_id < 0) {
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errmsg("bad volume ID: " "\"%s\"", optarg);
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return -1;
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}
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break;
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case 'N':
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args.name = optarg;
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break;
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case 'h':
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case '?':
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printf("%s\n\n", doc);
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printf("%s\n\n", usage);
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printf("%s\n", optionsstr);
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exit(EXIT_SUCCESS);
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case 'V':
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common_print_version();
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exit(EXIT_SUCCESS);
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case ':':
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errmsg("parameter is missing");
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return -1;
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default:
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fprintf(stderr, "Use -h for help\n");
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return -1;
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}
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}
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if (optind == argc) {
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errmsg("UBI device name was not specified (use -h for help)");
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return -1;
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} else if (optind != argc - 1) {
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errmsg("more then one UBI device specified (use -h for help)");
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return -1;
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}
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args.node = argv[optind];
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if (param_sanity_check())
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return -1;
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return 0;
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}
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int main(int argc, char * const argv[])
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{
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int err;
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libubi_t libubi;
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struct ubi_dev_info dev_info;
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struct ubi_vol_info vol_info;
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err = parse_opt(argc, argv);
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if (err)
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return -1;
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libubi = libubi_open();
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if (!libubi)
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return sys_errmsg("cannot open libubi");
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err = ubi_probe_node(libubi, args.node);
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if (err == 2) {
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errmsg("\"%s\" is an UBI volume node, not an UBI device node",
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args.node);
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goto out_libubi;
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} else if (err < 0) {
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if (errno == ENODEV)
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errmsg("\"%s\" is not an UBI device node", args.node);
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else
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sys_errmsg("error while probing \"%s\"", args.node);
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}
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err = ubi_get_dev_info(libubi, args.node, &dev_info);
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if (err) {
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sys_errmsg("cannot get information about UBI device \"%s\"",
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args.node);
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goto out_libubi;
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}
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if (args.name) {
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err = ubi_get_vol_info1_nm(libubi, dev_info.dev_num,
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args.name, &vol_info);
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if (err) {
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sys_errmsg("cannot find UBI volume \"%s\"", args.name);
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goto out_libubi;
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}
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args.vol_id = vol_info.vol_id;
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} else {
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err = ubi_get_vol_info1(libubi, dev_info.dev_num,
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args.vol_id, &vol_info);
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if (err) {
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sys_errmsg("cannot find UBI volume ID %d", args.vol_id);
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goto out_libubi;
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}
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}
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if (args.lebs != -1)
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args.bytes = vol_info.leb_size * args.lebs;
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err = ubi_rsvol(libubi, args.node, args.vol_id, args.bytes);
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if (err) {
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sys_errmsg("cannot UBI resize volume");
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goto out_libubi;
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}
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libubi_close(libubi);
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return 0;
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out_libubi:
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libubi_close(libubi);
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return -1;
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}
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