aboutsummaryrefslogtreecommitdiff
path: root/ubi-utils/mtdinfo.c
blob: a9dc6752a7c4e4d97640f3c067f7dd6acd750bff (plain)
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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
/*
 * Copyright (C) 2009 Nokia Corporation.
 *
 * 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 MTD information.
 *
 * Author: Artem Bityutskiy
 */

#define PROGRAM_NAME    "mtdinfo"

#include <stdint.h>
#include <stdio.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <mtd/mtd-user.h>

#include <libubigen.h>
#include <libmtd.h>
#include "common.h"
#include "ubiutils-common.h"

/* The variables below are set by command line arguments */
struct args {
	unsigned int all:1;
	unsigned int ubinfo:1;
	unsigned int map:1;
	const char *node;
};

static struct args args = {
	.ubinfo = 0,
	.all = 0,
	.node = NULL,
};

static void display_help(void)
{
	printf(
		"%1$s version %2$s - a tool to print MTD information.\n"
		"\n"
		"Usage: %1$s <MTD node file path> [--map | -M] [--ubi-info | -u]\n"
		"       %1$s --all [--ubi-info | -u]\n"
		"       %1$s [--help | --version]\n"
		"\n"
		"Options:\n"
		"-u, --ubi-info                  print what would UBI layout be if it was put\n"
		"                                on this MTD device\n"
		"-M, --map                       print eraseblock map\n"
		"-a, --all                       print information about all MTD devices\n"
		"                                Note: `--all' may give less info per device\n"
		"                                than, e.g., `mtdinfo /dev/mtdX'\n"
		"-h, --help                      print help message\n"
		"-V, --version                   print program version\n"
		"\n"
		"Examples:\n"
		"  %1$s /dev/mtd0             print information MTD device /dev/mtd0\n"
		"  %1$s /dev/mtd0 -u          print information MTD device /dev/mtd0\n"
		"  %4$*3$s                    and include UBI layout information\n"
		"  %1$s -a                    print information about all MTD devices\n",
		PROGRAM_NAME, VERSION, (int)strlen(PROGRAM_NAME) + 3, "");
}

static const struct option long_options[] = {
	{ .name = "ubi-info",  .has_arg = 0, .flag = NULL, .val = 'u' },
	{ .name = "map",       .has_arg = 0, .flag = NULL, .val = 'M' },
	{ .name = "all",       .has_arg = 0, .flag = NULL, .val = 'a' },
	{ .name = "help",      .has_arg = 0, .flag = NULL, .val = 'h' },
	{ .name = "version",   .has_arg = 0, .flag = NULL, .val = 'V' },
	{ NULL, 0, NULL, 0},
};

static int parse_opt(int argc, char * const argv[])
{
	while (1) {
		int key;

		key = getopt_long(argc, argv, "auMhV", long_options, NULL);
		if (key == -1)
			break;

		switch (key) {
		case 'a':
			args.all = 1;
			break;

		case 'u':
			args.ubinfo = 1;
			break;

		case 'M':
			args.map = 1;
			break;

		case 'h':
			display_help();
			exit(EXIT_SUCCESS);

		case 'V':
			common_print_version();
			exit(EXIT_SUCCESS);

		case ':':
			return errmsg("parameter is missing");

		default:
			fprintf(stderr, "Use -h for help\n");
			return -1;
		}
	}

	if (optind == argc - 1)
		args.node = argv[optind];
	else if (optind < argc)
		return errmsg("more then one MTD device specified (use -h for help)");

	if (args.all && args.node)
		args.node = NULL;

	if (args.map && !args.node)
		return errmsg("-M requires MTD device node name");

	return 0;
}

static int translate_dev(libmtd_t libmtd, const char *node)
{
	int err;
	struct mtd_dev_info mtd;

	err = mtd_get_dev_info(libmtd, node, &mtd);
	if (err) {
		if (errno == ENODEV)
			return errmsg("\"%s\" does not correspond to any "
				      "existing MTD device", node);
		return sys_errmsg("cannot get information about MTD "
				  "device \"%s\"", node);
	}

	return mtd.mtd_num;
}

static void print_ubi_info(const struct mtd_info *mtd_info,
			   const struct mtd_dev_info *mtd)
{
	struct ubigen_info ui;

	if (!mtd_info->sysfs_supported) {
		errmsg("cannot provide UBI info, becasue sub-page size is "
		       "not known");
		return;
	}

	ubigen_info_init(&ui, mtd->eb_size, mtd->min_io_size, mtd->subpage_size,
			 0, 1, 0);
	printf("Default UBI VID header offset:  %d\n", ui.vid_hdr_offs);
	printf("Default UBI data offset:        %d\n", ui.data_offs);
	printf("Default UBI LEB size:           ");
	ubiutils_print_bytes(ui.leb_size, 0);
	printf("\n");
	printf("Maximum UBI volumes count:      %d\n", ui.max_volumes);
}

static void print_region_map(const struct mtd_dev_info *mtd, int fd,
			     const region_info_t *reginfo)
{
	unsigned long start;
	int i, width;
	int ret_locked, errno_locked, ret_bad, errno_bad;

	printf("Eraseblock map:\n");

	/* Figure out the number of spaces to pad w/out libm */
	for (i = 1, width = 0; i < reginfo->numblocks; i *= 10, ++width)
		continue;

	/* If we don't have a fd to query, just show the bare map */
	if (fd == -1) {
		ret_locked = ret_bad = -1;
		errno_locked = errno_bad = ENODEV;
	} else
		ret_locked = ret_bad = errno_locked = errno_bad = 0;

	for (i = 0; i < reginfo->numblocks; ++i) {
		start = reginfo->offset + i * reginfo->erasesize;
		printf(" %*i: %08lx ", width, i, start);

		if (ret_locked != -1) {
			ret_locked = mtd_is_locked(mtd, fd, i);
			if (ret_locked == 1)
				printf("RO ");
			else
				errno_locked = errno;
		}
		if (ret_locked != 1)
			printf("   ");

		if (ret_bad != -1) {
			ret_bad = mtd_is_bad(mtd, fd, i);
			if (ret_bad == 1)
				printf("BAD ");
			else
				errno_bad = errno;
		}
		if (ret_bad != 1)
			printf("    ");

		if (((i + 1) % 4) == 0)
			printf("\n");
	}
	if (i % 4)
		printf("\n");

	if (ret_locked == -1 && errno_locked != EOPNOTSUPP) {
		errno = errno_locked;
		sys_errmsg("could not read locked block info");
	}

	if (mtd->bb_allowed && ret_bad == -1 && errno_bad != EOPNOTSUPP) {
		errno = errno_bad;
		sys_errmsg("could not read bad block info");
	}
}

static void print_region_info(const struct mtd_dev_info *mtd)
{
	region_info_t reginfo;
	int r, fd;

	/*
	 * If we don't have any region info, just return
	 *
	 * FIXME: We can't get region_info (via ioctl) without having the MTD
	 *        node path. This is a problem for `mtdinfo -a', for example,
	 *        since it doesn't provide any filepath information.
	 */
	if (!args.node || (!args.map && mtd->region_cnt == 0))
		return;

	/* First open the device so we can query it */
	fd = open(args.node, O_RDONLY | O_CLOEXEC);
	if (fd == -1) {
		sys_errmsg("couldn't open MTD dev: %s", args.node);
		if (mtd->region_cnt)
			return;
	}

	/* Walk all the regions and show the map for them */
	if (mtd->region_cnt) {
		for (r = 0; r < mtd->region_cnt; ++r) {
			printf("Eraseblock region %i: ", r);
			if (mtd_regioninfo(fd, r, &reginfo) == 0) {
				printf(" offset: %#x size: %#x numblocks: %#x\n",
					reginfo.offset, reginfo.erasesize,
					reginfo.numblocks);
				if (args.map)
					print_region_map(mtd, fd, &reginfo);
			} else
				printf(" info is unavailable\n");
		}
	} else {
		reginfo.offset = 0;
		reginfo.erasesize = mtd->eb_size;
		reginfo.numblocks = mtd->eb_cnt;
		reginfo.regionindex = 0;
		print_region_map(mtd, fd, &reginfo);
	}

	if (fd != -1)
		close(fd);
}

static int print_dev_info(libmtd_t libmtd, const struct mtd_info *mtd_info, int mtdn)
{
	int err;
	struct mtd_dev_info mtd;

	err = mtd_get_dev_info1(libmtd, mtdn, &mtd);
	if (err) {
		if (errno == ENODEV)
			return errmsg("mtd%d does not correspond to any "
				      "existing MTD device", mtdn);
		return sys_errmsg("cannot get information about MTD device %d",
				  mtdn);
	}

	printf("mtd%d\n", mtd.mtd_num);
	printf("Name:                           %s\n", mtd.name);
	printf("Type:                           %s\n", mtd.type_str);
	printf("Eraseblock size:                ");
	ubiutils_print_bytes(mtd.eb_size, 0);
	printf("\n");
	printf("Amount of eraseblocks:          %d (", mtd.eb_cnt);
	ubiutils_print_bytes(mtd.size, 0);
	printf(")\n");
	printf("Minimum input/output unit size: %d %s\n",
	       mtd.min_io_size, mtd.min_io_size > 1 ? "bytes" : "byte");
	if (mtd_info->sysfs_supported)
		printf("Sub-page size:                  %d %s\n",
		       mtd.subpage_size,
		       mtd.subpage_size > 1 ? "bytes" : "byte");
	else if (mtd.type == MTD_NANDFLASH)
		printf("Sub-page size:                  unknown\n");

	if (mtd.oob_size > 0)
		printf("OOB size:                       %d bytes\n",
		       mtd.oob_size);
	if (mtd.region_cnt > 0)
		printf("Additional erase regions:       %d\n", mtd.oob_size);
	if (mtd_info->sysfs_supported)
		printf("Character device major/minor:   %d:%d\n",
		       mtd.major, mtd.minor);
	printf("Bad blocks are allowed:         %s\n",
	       mtd.bb_allowed ? "true" : "false");
	printf("Device is writable:             %s\n",
	      mtd.writable ? "true" : "false");

	if (args.ubinfo)
		print_ubi_info(mtd_info, &mtd);

	print_region_info(&mtd);

	printf("\n");
	return 0;
}

static int print_general_info(libmtd_t libmtd, const struct mtd_info *mtd_info,
			      int all)
{
	int i, err, first = 1;
	struct mtd_dev_info mtd;

	printf("Count of MTD devices:           %d\n", mtd_info->mtd_dev_cnt);
	if (mtd_info->mtd_dev_cnt == 0)
		return 0;

	for (i = mtd_info->lowest_mtd_num;
	     i <= mtd_info->highest_mtd_num; i++) {
		err = mtd_get_dev_info1(libmtd, i, &mtd);
		if (err == -1) {
			if (errno == ENODEV)
				continue;
			return sys_errmsg("libmtd failed to get MTD device %d "
					  "information", i);
		}

		if (!first)
			printf(", mtd%d", i);
		else {
			printf("Present MTD devices:            mtd%d", i);
			first = 0;
		}
	}
	printf("\n");
	printf("Sysfs interface supported:      %s\n",
	       mtd_info->sysfs_supported ? "yes" : "no");

	if (!all)
		return 0;

	printf("\n");

	for (i = mtd_info->lowest_mtd_num;
	     i <= mtd_info->highest_mtd_num; i++) {
		if (!mtd_dev_present(libmtd, i))
			continue;
		err = print_dev_info(libmtd, mtd_info, i);
		if (err)
			return err;
	}

	return 0;
}

int main(int argc, char * const argv[])
{
	int err;
	libmtd_t libmtd;
	struct mtd_info mtd_info;

	err = parse_opt(argc, argv);
	if (err)
		return -1;

	libmtd = libmtd_open();
	if (libmtd == NULL) {
		if (errno == 0)
			return errmsg("MTD is not present in the system");
		return sys_errmsg("cannot open libmtd");
	}

	err = mtd_get_info(libmtd, &mtd_info);
	if (err) {
		if (errno == ENODEV)
			return errmsg("MTD is not present");
		return sys_errmsg("cannot get MTD information");
	}

	if (!args.all && args.node) {
		int mtdn;

		/*
		 * A character device was specified, translate this to MTD
		 * device number.
		 */
		mtdn = translate_dev(libmtd, args.node);
		if (mtdn < 0)
			goto out_libmtd;
		err = print_dev_info(libmtd, &mtd_info, mtdn);
	} else
		err = print_general_info(libmtd, &mtd_info, args.all);
	if (err)
		goto out_libmtd;

	libmtd_close(libmtd);
	return 0;

out_libmtd:
	libmtd_close(libmtd);
	return -1;
}