295 lines
8.1 KiB
C
295 lines
8.1 KiB
C
/*
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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 create 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 "ubimkvol"
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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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int vol_type;
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long long bytes;
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int lebs;
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int alignment;
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const char *name;
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const char *node;
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int maxavs;
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};
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static struct args args = {
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.vol_type = UBI_DYNAMIC_VOLUME,
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.bytes = -1,
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.lebs = -1,
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.alignment = 1,
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.vol_id = UBI_VOL_NUM_AUTO,
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};
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static const char doc[] = PROGRAM_NAME " version " VERSION
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" - a tool to create UBI volumes.";
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static const char optionsstr[] =
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"-a, --alignment=<alignment> volume alignment (default is 1)\n"
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"-n, --vol_id=<volume ID> UBI volume ID, if not specified, the volume ID\n"
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" will be assigned automatically\n"
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"-N, --name=<name> volume name\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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"-m, --maxavsize set volume size to maximum available size\n"
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"-t, --type=<static|dynamic> volume type (dynamic, static), default is dynamic\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> [-h] [-a <alignment>] [-n <volume ID>] [-N <name>]\n"
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"\t\t\t[-s <bytes>] [-S <LEBs>] [-t <static|dynamic>] [-V] [-m]\n"
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"\t\t\t[--alignment=<alignment>][--vol_id=<volume ID>] [--name=<name>]\n"
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"\t\t\t[--size=<bytes>] [--lebs=<LEBs>] [--type=<static|dynamic>] [--help]\n"
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"\t\t\t[--version] [--maxavsize]\n\n"
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"Example: " PROGRAM_NAME " /dev/ubi0 -s 20MiB -N config_data - create a 20 Megabytes volume\n"
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" named \"config_data\" on UBI device /dev/ubi0.";
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static const struct option long_options[] = {
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{ .name = "alignment", .has_arg = 1, .flag = NULL, .val = 'a' },
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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 = "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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{ .name = "type", .has_arg = 1, .flag = NULL, .val = 't' },
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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 = "maxavsize", .has_arg = 0, .flag = NULL, .val = 'm' },
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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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int len;
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if (args.bytes == -1 && !args.maxavs && 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.maxavs || args.lebs != -1)) ||
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(args.lebs != -1 && (args.maxavs || args.bytes != -1)) ||
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(args.maxavs && (args.bytes != -1 || args.lebs != -1)))
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return errmsg("size specified with more then one option");
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if (args.name == NULL)
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return errmsg("volume name was not specified (use -h for help)");
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len = strlen(args.name);
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if (len > UBI_MAX_VOLUME_NAME)
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return errmsg("too long name (%d symbols), max is %d", len, UBI_MAX_VOLUME_NAME);
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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, "a:n:N:s:S:t:h?Vm", 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 't':
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if (!strcmp(optarg, "dynamic"))
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args.vol_type = UBI_DYNAMIC_VOLUME;
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else if (!strcmp(optarg, "static"))
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args.vol_type = UBI_STATIC_VOLUME;
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else
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return errmsg("bad volume type: \"%s\"", optarg);
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break;
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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 'a':
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args.alignment = simple_strtoul(optarg, &error);
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if (error || args.alignment <= 0)
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return errmsg("bad volume alignment: \"%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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return errmsg("bad volume ID: " "\"%s\"", optarg);
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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 'm':
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args.maxavs = 1;
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break;
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case ':':
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return errmsg("parameter is missing");
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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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return errmsg("UBI device name was not specified (use -h for help)");
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else if (optind != argc - 1)
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return errmsg("more then one UBI device specified (use -h for help)");
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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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struct ubi_mkvol_request req;
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err = parse_opt(argc, argv);
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if (err)
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return err;
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libubi = libubi_open();
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if (!libubi) {
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if (errno == 0)
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return errmsg("UBI is not present in the system");
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return sys_errmsg("cannot open libubi");
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}
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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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goto out_libubi;
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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 (dev_info.avail_bytes == 0) {
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errmsg("UBI device does not have free logical eraseblocks");
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goto out_libubi;
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}
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if (args.maxavs) {
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args.bytes = dev_info.avail_bytes;
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printf("Set volume size to %lld\n", args.bytes);
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}
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if (args.lebs != -1) {
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args.bytes = dev_info.leb_size;
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args.bytes -= dev_info.leb_size % args.alignment;
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args.bytes *= args.lebs;
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}
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req.vol_id = args.vol_id;
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req.alignment = args.alignment;
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req.bytes = args.bytes;
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req.vol_type = args.vol_type;
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req.name = args.name;
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err = ubi_mkvol(libubi, args.node, &req);
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if (err < 0) {
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sys_errmsg("cannot UBI create volume");
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goto out_libubi;
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}
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args.vol_id = req.vol_id;
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/* Print information about the created device */
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err = ubi_get_vol_info1(libubi, dev_info.dev_num, args.vol_id, &vol_info);
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if (err) {
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sys_errmsg("cannot get information about newly created UBI volume");
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goto out_libubi;
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}
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printf("Volume ID %d, size %d LEBs (", vol_info.vol_id, vol_info.rsvd_lebs);
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ubiutils_print_bytes(vol_info.rsvd_bytes, 0);
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printf("), LEB size ");
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ubiutils_print_bytes(vol_info.leb_size, 1);
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printf(", %s, name \"%s\", alignment %d\n",
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req.vol_type == UBI_DYNAMIC_VOLUME ? "dynamic" : "static",
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vol_info.name, vol_info.alignment);
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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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