cmd/ubi.c

   1 /*
   2  * Unsorted Block Image commands
   3  *
   4  *  Copyright (C) 2008 Samsung Electronics
   5  *  Kyungmin Park <kyungmin.park@samsung.com>
   6  *
   7  * Copyright 2008-2009 Stefan Roese <sr@denx.de>, DENX Software Engineering
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <common.h>
  15 #include <command.h>
  16 #include <env.h>
  17 #include <exports.h>
  18 #include <malloc.h>
  19 #include <memalign.h>
  20 #include <mtd.h>
  21 #include <nand.h>
  22 #include <onenand_uboot.h>
  23 #include <dm/devres.h>
  24 #include <linux/mtd/mtd.h>
  25 #include <linux/mtd/partitions.h>
  26 #include <linux/err.h>
  27 #include <ubi_uboot.h>
  28 #include <linux/errno.h>
  29 #include <jffs2/load_kernel.h>
  30
  31 #undef ubi_msg
  32 #define ubi_msg(fmt, ...) printf("UBI: " fmt "\n", ##__VA_ARGS__)
  33
  34 /* Private own data */
  35 static struct ubi_device *ubi;
  36
  37 #ifdef CONFIG_CMD_UBIFS
  38 #include <ubifs_uboot.h>
  39 #endif
  40
  41 static void display_volume_info(struct ubi_device *ubi)
  42 {
  43         int i;
  44
  45         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
  46                 if (!ubi->volumes[i])
  47                         continue;       /* Empty record */
  48                 ubi_dump_vol_info(ubi->volumes[i]);
  49         }
  50 }
  51
  52 static void display_ubi_info(struct ubi_device *ubi)
  53 {
  54         ubi_msg("MTD device name:            \"%s\"", ubi->mtd->name);
  55         ubi_msg("MTD device size:            %llu MiB", ubi->flash_size >> 20);
  56         ubi_msg("physical eraseblock size:   %d bytes (%d KiB)",
  57                         ubi->peb_size, ubi->peb_size >> 10);
  58         ubi_msg("logical eraseblock size:    %d bytes", ubi->leb_size);
  59         ubi_msg("number of good PEBs:        %d", ubi->good_peb_count);
  60         ubi_msg("number of bad PEBs:         %d", ubi->bad_peb_count);
  61         ubi_msg("smallest flash I/O unit:    %d", ubi->min_io_size);
  62         ubi_msg("VID header offset:          %d (aligned %d)",
  63                         ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
  64         ubi_msg("data offset:                %d", ubi->leb_start);
  65         ubi_msg("max. allowed volumes:       %d", ubi->vtbl_slots);
  66         ubi_msg("wear-leveling threshold:    %d", CONFIG_MTD_UBI_WL_THRESHOLD);
  67         ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
  68         ubi_msg("number of user volumes:     %d",
  69                         ubi->vol_count - UBI_INT_VOL_COUNT);
  70         ubi_msg("available PEBs:             %d", ubi->avail_pebs);
  71         ubi_msg("total number of reserved PEBs: %d", ubi->rsvd_pebs);
  72         ubi_msg("number of PEBs reserved for bad PEB handling: %d",
  73                         ubi->beb_rsvd_pebs);
  74         ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
  75 }
  76
  77 static int ubi_info(int layout)
  78 {
  79         if (layout)
  80                 display_volume_info(ubi);
  81         else
  82                 display_ubi_info(ubi);
  83
  84         return 0;
  85 }
  86
  87 static int ubi_check_volumename(const struct ubi_volume *vol, char *name)
  88 {
  89         return strcmp(vol->name, name);
  90 }
  91
  92 static int ubi_check(char *name)
  93 {
  94         int i;
  95
  96         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
  97                 if (!ubi->volumes[i])
  98                         continue;       /* Empty record */
  99
 100                 if (!ubi_check_volumename(ubi->volumes[i], name))
 101                         return 0;
 102         }
 103
 104         return 1;
 105 }
 106
 107 static int verify_mkvol_req(const struct ubi_device *ubi,
 108                             const struct ubi_mkvol_req *req)
 109 {
 110         int n, err = EINVAL;
 111
 112         if (req->bytes < 0 || req->alignment < 0 || req->vol_type < 0 ||
 113             req->name_len < 0)
 114                 goto bad;
 115
 116         if ((req->vol_id < 0 || req->vol_id >= ubi->vtbl_slots) &&
 117             req->vol_id != UBI_VOL_NUM_AUTO)
 118                 goto bad;
 119
 120         if (req->alignment == 0)
 121                 goto bad;
 122
 123         if (req->bytes == 0) {
 124                 printf("No space left in UBI device!\n");
 125                 err = ENOMEM;
 126                 goto bad;
 127         }
 128
 129         if (req->vol_type != UBI_DYNAMIC_VOLUME &&
 130             req->vol_type != UBI_STATIC_VOLUME)
 131                 goto bad;
 132
 133         if (req->alignment > ubi->leb_size)
 134                 goto bad;
 135
 136         n = req->alignment % ubi->min_io_size;
 137         if (req->alignment != 1 && n)
 138                 goto bad;
 139
 140         if (req->name_len > UBI_VOL_NAME_MAX) {
 141                 printf("Name too long!\n");
 142                 err = ENAMETOOLONG;
 143                 goto bad;
 144         }
 145
 146         return 0;
 147 bad:
 148         return err;
 149 }
 150
 151 static int ubi_create_vol(char *volume, int64_t size, int dynamic, int vol_id,
 152                           bool skipcheck)
 153 {
 154         struct ubi_mkvol_req req;
 155         int err;
 156
 157         if (dynamic)
 158                 req.vol_type = UBI_DYNAMIC_VOLUME;
 159         else
 160                 req.vol_type = UBI_STATIC_VOLUME;
 161
 162         req.vol_id = vol_id;
 163         req.alignment = 1;
 164         req.bytes = size;
 165
 166         strcpy(req.name, volume);
 167         req.name_len = strlen(volume);
 168         req.name[req.name_len] = '\0';
 169         req.flags = 0;
 170         if (skipcheck)
 171                 req.flags |= UBI_VOL_SKIP_CRC_CHECK_FLG;
 172
 173         /* It's duplicated at drivers/mtd/ubi/cdev.c */
 174         err = verify_mkvol_req(ubi, &req);
 175         if (err) {
 176                 printf("verify_mkvol_req failed %d\n", err);
 177                 return err;
 178         }
 179         printf("Creating %s volume %s of size %lld\n",
 180                 dynamic ? "dynamic" : "static", volume, size);
 181         /* Call real ubi create volume */
 182         return ubi_create_volume(ubi, &req);
 183 }
 184
 185 static struct ubi_volume *ubi_find_volume(char *volume)
 186 {
 187         struct ubi_volume *vol = NULL;
 188         int i;
 189
 190         for (i = 0; i < ubi->vtbl_slots; i++) {
 191                 vol = ubi->volumes[i];
 192                 if (vol && !strcmp(vol->name, volume))
 193                         return vol;
 194         }
 195
 196         printf("Volume %s not found!\n", volume);
 197         return NULL;
 198 }
 199
 200 static int ubi_remove_vol(char *volume)
 201 {
 202         int err, reserved_pebs, i;
 203         struct ubi_volume *vol;
 204
 205         vol = ubi_find_volume(volume);
 206         if (vol == NULL)
 207                 return ENODEV;
 208
 209         printf("Remove UBI volume %s (id %d)\n", vol->name, vol->vol_id);
 210
 211         if (ubi->ro_mode) {
 212                 printf("It's read-only mode\n");
 213                 err = EROFS;
 214                 goto out_err;
 215         }
 216
 217         err = ubi_change_vtbl_record(ubi, vol->vol_id, NULL);
 218         if (err) {
 219                 printf("Error changing Vol tabel record err=%x\n", err);
 220                 goto out_err;
 221         }
 222         reserved_pebs = vol->reserved_pebs;
 223         for (i = 0; i < vol->reserved_pebs; i++) {
 224                 err = ubi_eba_unmap_leb(ubi, vol, i);
 225                 if (err)
 226                         goto out_err;
 227         }
 228
 229         kfree(vol->eba_tbl);
 230         ubi->volumes[vol->vol_id]->eba_tbl = NULL;
 231         ubi->volumes[vol->vol_id] = NULL;
 232
 233         ubi->rsvd_pebs -= reserved_pebs;
 234         ubi->avail_pebs += reserved_pebs;
 235         i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
 236         if (i > 0) {
 237                 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
 238                 ubi->avail_pebs -= i;
 239                 ubi->rsvd_pebs += i;
 240                 ubi->beb_rsvd_pebs += i;
 241                 if (i > 0)
 242                         ubi_msg("reserve more %d PEBs", i);
 243         }
 244         ubi->vol_count -= 1;
 245
 246         return 0;
 247 out_err:
 248         ubi_err(ubi, "cannot remove volume %s, error %d", volume, err);
 249         if (err < 0)
 250                 err = -err;
 251         return err;
 252 }
 253
 254 static int ubi_rename_vol(char *oldname, char *newname)
 255 {
 256         struct ubi_volume *vol;
 257         struct ubi_rename_entry rename;
 258         struct ubi_volume_desc desc;
 259         struct list_head list;
 260
 261         vol = ubi_find_volume(oldname);
 262         if (!vol) {
 263                 printf("%s: volume %s doesn't exist\n", __func__, oldname);
 264                 return ENODEV;
 265         }
 266
 267         printf("Rename UBI volume %s to %s\n", oldname, newname);
 268
 269         if (ubi->ro_mode) {
 270                 printf("%s: ubi device is in read-only mode\n", __func__);
 271                 return EROFS;
 272         }
 273
 274         rename.new_name_len = strlen(newname);
 275         strcpy(rename.new_name, newname);
 276         rename.remove = 0;
 277         desc.vol = vol;
 278         desc.mode = 0;
 279         rename.desc = &desc;
 280         INIT_LIST_HEAD(&rename.list);
 281         INIT_LIST_HEAD(&list);
 282         list_add(&rename.list, &list);
 283
 284         return ubi_rename_volumes(ubi, &list);
 285 }
 286
 287 static int ubi_volume_continue_write(char *volume, void *buf, size_t size)
 288 {
 289         int err = 1;
 290         struct ubi_volume *vol;
 291
 292         vol = ubi_find_volume(volume);
 293         if (vol == NULL)
 294                 return ENODEV;
 295
 296         err = ubi_more_update_data(ubi, vol, buf, size);
 297         if (err < 0) {
 298                 printf("Couldnt or partially wrote data\n");
 299                 return -err;
 300         }
 301
 302         if (err) {
 303                 size = err;
 304
 305                 err = ubi_check_volume(ubi, vol->vol_id);
 306                 if (err < 0)
 307                         return -err;
 308
 309                 if (err) {
 310                         ubi_warn(ubi, "volume %d on UBI device %d is corrupt",
 311                                  vol->vol_id, ubi->ubi_num);
 312                         vol->corrupted = 1;
 313                 }
 314
 315                 vol->checked = 1;
 316                 ubi_gluebi_updated(vol);
 317         }
 318
 319         return 0;
 320 }
 321
 322 int ubi_volume_begin_write(char *volume, void *buf, size_t size,
 323         size_t full_size)
 324 {
 325         int err = 1;
 326         int rsvd_bytes = 0;
 327         struct ubi_volume *vol;
 328
 329         vol = ubi_find_volume(volume);
 330         if (vol == NULL)
 331                 return ENODEV;
 332
 333         rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
 334         if (size > rsvd_bytes) {
 335                 printf("size > volume size! Aborting!\n");
 336                 return EINVAL;
 337         }
 338
 339         err = ubi_start_update(ubi, vol, full_size);
 340         if (err < 0) {
 341                 printf("Cannot start volume update\n");
 342                 return -err;
 343         }
 344
 345         return ubi_volume_continue_write(volume, buf, size);
 346 }
 347
 348 int ubi_volume_write(char *volume, void *buf, size_t size)
 349 {
 350         return ubi_volume_begin_write(volume, buf, size, size);
 351 }
 352
 353 int ubi_volume_read(char *volume, char *buf, size_t size)
 354 {
 355         int err, lnum, off, len, tbuf_size;
 356         void *tbuf;
 357         unsigned long long tmp;
 358         struct ubi_volume *vol;
 359         loff_t offp = 0;
 360         size_t len_read;
 361
 362         vol = ubi_find_volume(volume);
 363         if (vol == NULL)
 364                 return ENODEV;
 365
 366         if (vol->updating) {
 367                 printf("updating");
 368                 return EBUSY;
 369         }
 370         if (vol->upd_marker) {
 371                 printf("damaged volume, update marker is set");
 372                 return EBADF;
 373         }
 374         if (offp == vol->used_bytes)
 375                 return 0;
 376
 377         if (size == 0) {
 378                 printf("No size specified -> Using max size (%lld)\n", vol->used_bytes);
 379                 size = vol->used_bytes;
 380         }
 381
 382         printf("Read %zu bytes from volume %s to %p\n", size, volume, buf);
 383
 384         if (vol->corrupted)
 385                 printf("read from corrupted volume %d", vol->vol_id);
 386         if (offp + size > vol->used_bytes)
 387                 size = vol->used_bytes - offp;
 388
 389         tbuf_size = vol->usable_leb_size;
 390         if (size < tbuf_size)
 391                 tbuf_size = ALIGN(size, ubi->min_io_size);
 392         tbuf = malloc_cache_aligned(tbuf_size);
 393         if (!tbuf) {
 394                 printf("NO MEM\n");
 395                 return ENOMEM;
 396         }
 397         len = size > tbuf_size ? tbuf_size : size;
 398
 399         tmp = offp;
 400         off = do_div(tmp, vol->usable_leb_size);
 401         lnum = tmp;
 402         len_read = size;
 403         do {
 404                 if (off + len >= vol->usable_leb_size)
 405                         len = vol->usable_leb_size - off;
 406
 407                 err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
 408                 if (err) {
 409                         printf("read err %x\n", err);
 410                         err = -err;
 411                         break;
 412                 }
 413                 off += len;
 414                 if (off == vol->usable_leb_size) {
 415                         lnum += 1;
 416                         off -= vol->usable_leb_size;
 417                 }
 418
 419                 size -= len;
 420                 offp += len;
 421
 422                 memcpy(buf, tbuf, len);
 423
 424                 buf += len;
 425                 len = size > tbuf_size ? tbuf_size : size;
 426         } while (size);
 427
 428         if (!size)
 429                 env_set_hex("filesize", len_read);
 430
 431         free(tbuf);
 432         return err;
 433 }
 434
 435 static int ubi_dev_scan(struct mtd_info *info, const char *vid_header_offset)
 436 {
 437         char ubi_mtd_param_buffer[80];
 438         int err;
 439
 440         if (!vid_header_offset)
 441                 sprintf(ubi_mtd_param_buffer, "%s", info->name);
 442         else
 443                 sprintf(ubi_mtd_param_buffer, "%s,%s", info->name,
 444                         vid_header_offset);
 445
 446         err = ubi_mtd_param_parse(ubi_mtd_param_buffer, NULL);
 447         if (err)
 448                 return -err;
 449
 450         err = ubi_init();
 451         if (err)
 452                 return -err;
 453
 454         return 0;
 455 }
 456
 457 static int ubi_set_skip_check(char *volume, bool skip_check)
 458 {
 459         struct ubi_vtbl_record vtbl_rec;
 460         struct ubi_volume *vol;
 461
 462         vol = ubi_find_volume(volume);
 463         if (!vol)
 464                 return ENODEV;
 465
 466         printf("%sing skip_check on volume %s\n",
 467                skip_check ? "Sett" : "Clear", volume);
 468
 469         vtbl_rec = ubi->vtbl[vol->vol_id];
 470         if (skip_check) {
 471                 vtbl_rec.flags |= UBI_VTBL_SKIP_CRC_CHECK_FLG;
 472                 vol->skip_check = 1;
 473         } else {
 474                 vtbl_rec.flags &= ~UBI_VTBL_SKIP_CRC_CHECK_FLG;
 475                 vol->skip_check = 0;
 476         }
 477
 478         return ubi_change_vtbl_record(ubi, vol->vol_id, &vtbl_rec);
 479 }
 480
 481 static int ubi_detach(void)
 482 {
 483 #ifdef CONFIG_CMD_UBIFS
 484         /*
 485          * Automatically unmount UBIFS partition when user
 486          * changes the UBI device. Otherwise the following
 487          * UBIFS commands will crash.
 488          */
 489         if (ubifs_is_mounted())
 490                 cmd_ubifs_umount();
 491 #endif
 492
 493         /*
 494          * Call ubi_exit() before re-initializing the UBI subsystem
 495          */
 496         if (ubi)
 497                 ubi_exit();
 498
 499         ubi = NULL;
 500
 501         return 0;
 502 }
 503
 504 int ubi_part(char *part_name, const char *vid_header_offset)
 505 {
 506         struct mtd_info *mtd;
 507         int err = 0;
 508
 509         ubi_detach();
 510
 511         mtd_probe_devices();
 512         mtd = get_mtd_device_nm(part_name);
 513         if (IS_ERR(mtd)) {
 514                 printf("Partition %s not found!\n", part_name);
 515                 return 1;
 516         }
 517         put_mtd_device(mtd);
 518
 519         err = ubi_dev_scan(mtd, vid_header_offset);
 520         if (err) {
 521                 printf("UBI init error %d\n", err);
 522                 printf("Please check, if the correct MTD partition is used (size big enough?)\n");
 523                 return err;
 524         }
 525
 526         ubi = ubi_devices[0];
 527
 528         return 0;
 529 }
 530
 531 static int do_ubi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 532 {
 533         int64_t size = 0;
 534         ulong addr = 0;
 535         bool skipcheck = false;
 536
 537         if (argc < 2)
 538                 return CMD_RET_USAGE;
 539
 540         if (strcmp(argv[1], "detach") == 0)
 541                 return ubi_detach();
 542
 543         if (strcmp(argv[1], "part") == 0) {
 544                 const char *vid_header_offset = NULL;
 545
 546                 /* Print current partition */
 547                 if (argc == 2) {
 548                         if (!ubi) {
 549                                 printf("Error, no UBI device selected!\n");
 550                                 return 1;
 551                         }
 552
 553                         printf("Device %d: %s, MTD partition %s\n",
 554                                ubi->ubi_num, ubi->ubi_name, ubi->mtd->name);
 555                         return 0;
 556                 }
 557
 558                 if (argc < 3)
 559                         return CMD_RET_USAGE;
 560
 561                 if (argc > 3)
 562                         vid_header_offset = argv[3];
 563
 564                 return ubi_part(argv[2], vid_header_offset);
 565         }
 566
 567         if ((strcmp(argv[1], "part") != 0) && !ubi) {
 568                 printf("Error, no UBI device selected!\n");
 569                 return 1;
 570         }
 571
 572         if (strcmp(argv[1], "info") == 0) {
 573                 int layout = 0;
 574                 if (argc > 2 && !strncmp(argv[2], "l", 1))
 575                         layout = 1;
 576                 return ubi_info(layout);
 577         }
 578
 579         if (strcmp(argv[1], "check") == 0) {
 580                 if (argc > 2)
 581                         return ubi_check(argv[2]);
 582
 583                 printf("Error, no volume name passed\n");
 584                 return 1;
 585         }
 586
 587         if (strncmp(argv[1], "create", 6) == 0) {
 588                 int dynamic = 1;        /* default: dynamic volume */
 589                 int id = UBI_VOL_NUM_AUTO;
 590
 591                 /* Use maximum available size */
 592                 size = 0;
 593
 594                 /* E.g., create volume with "skipcheck" bit set */
 595                 if (argc == 7) {
 596                         skipcheck = strncmp(argv[6], "--skipcheck", 11) == 0;
 597                         argc--;
 598                 }
 599
 600                 /* E.g., create volume size type vol_id */
 601                 if (argc == 6) {
 602                         id = simple_strtoull(argv[5], NULL, 16);
 603                         argc--;
 604                 }
 605
 606                 /* E.g., create volume size type */
 607                 if (argc == 5) {
 608                         if (strncmp(argv[4], "s", 1) == 0)
 609                                 dynamic = 0;
 610                         else if (strncmp(argv[4], "d", 1) != 0) {
 611                                 printf("Incorrect type\n");
 612                                 return 1;
 613                         }
 614                         argc--;
 615                 }
 616                 /* E.g., create volume size */
 617                 if (argc == 4) {
 618                         if (argv[3][0] != '-')
 619                                 size = simple_strtoull(argv[3], NULL, 16);
 620                         argc--;
 621                 }
 622                 /* Use maximum available size */
 623                 if (!size) {
 624                         size = (int64_t)ubi->avail_pebs * ubi->leb_size;
 625                         printf("No size specified -> Using max size (%lld)\n", size);
 626                 }
 627                 /* E.g., create volume */
 628                 if (argc == 3) {
 629                         return ubi_create_vol(argv[2], size, dynamic, id,
 630                                               skipcheck);
 631                 }
 632         }
 633
 634         if (strncmp(argv[1], "remove", 6) == 0) {
 635                 /* E.g., remove volume */
 636                 if (argc == 3)
 637                         return ubi_remove_vol(argv[2]);
 638         }
 639
 640         if (IS_ENABLED(CONFIG_CMD_UBI_RENAME) && !strncmp(argv[1], "rename", 6))
 641                 return ubi_rename_vol(argv[2], argv[3]);
 642
 643         if (strncmp(argv[1], "skipcheck", 9) == 0) {
 644                 /* E.g., change skip_check flag */
 645                 if (argc == 4) {
 646                         skipcheck = strncmp(argv[3], "on", 2) == 0;
 647                         return ubi_set_skip_check(argv[2], skipcheck);
 648                 }
 649         }
 650
 651         if (strncmp(argv[1], "write", 5) == 0) {
 652                 int ret;
 653
 654                 if (argc < 5) {
 655                         printf("Please see usage\n");
 656                         return 1;
 657                 }
 658
 659                 addr = simple_strtoul(argv[2], NULL, 16);
 660                 size = simple_strtoul(argv[4], NULL, 16);
 661
 662                 if (strlen(argv[1]) == 10 &&
 663                     strncmp(argv[1] + 5, ".part", 5) == 0) {
 664                         if (argc < 6) {
 665                                 ret = ubi_volume_continue_write(argv[3],
 666                                                 (void *)addr, size);
 667                         } else {
 668                                 size_t full_size;
 669                                 full_size = simple_strtoul(argv[5], NULL, 16);
 670                                 ret = ubi_volume_begin_write(argv[3],
 671                                                 (void *)addr, size, full_size);
 672                         }
 673                 } else {
 674                         ret = ubi_volume_write(argv[3], (void *)addr, size);
 675                 }
 676                 if (!ret) {
 677                         printf("%lld bytes written to volume %s\n", size,
 678                                argv[3]);
 679                 }
 680
 681                 return ret;
 682         }
 683
 684         if (strncmp(argv[1], "read", 4) == 0) {
 685                 size = 0;
 686
 687                 /* E.g., read volume size */
 688                 if (argc == 5) {
 689                         size = simple_strtoul(argv[4], NULL, 16);
 690                         argc--;
 691                 }
 692
 693                 /* E.g., read volume */
 694                 if (argc == 4) {
 695                         addr = simple_strtoul(argv[2], NULL, 16);
 696                         argc--;
 697                 }
 698
 699                 if (argc == 3) {
 700                         return ubi_volume_read(argv[3], (char *)addr, size);
 701                 }
 702         }
 703
 704         printf("Please see usage\n");
 705         return 1;
 706 }
 707
 708 U_BOOT_CMD(
 709         ubi, 7, 1, do_ubi,
 710         "ubi commands",
 711         "detach"
 712                 " - detach ubi from a mtd partition\n"
 713         "ubi part [part] [offset]\n"
 714                 " - Show or set current partition (with optional VID"
 715                 " header offset)\n"
 716         "ubi info [l[ayout]]"
 717                 " - Display volume and ubi layout information\n"
 718         "ubi check volumename"
 719                 " - check if volumename exists\n"
 720         "ubi create[vol] volume [size] [type] [id] [--skipcheck]\n"
 721                 " - create volume name with size ('-' for maximum"
 722                 " available size)\n"
 723         "ubi write[vol] address volume size"
 724                 " - Write volume from address with size\n"
 725         "ubi write.part address volume size [fullsize]\n"
 726                 " - Write part of a volume from address\n"
 727         "ubi read[vol] address volume [size]"
 728                 " - Read volume to address with size\n"
 729         "ubi remove[vol] volume"
 730                 " - Remove volume\n"
 731 #if IS_ENABLED(CONFIG_CMD_UBI_RENAME)
 732         "ubi rename oldname newname\n"
 733 #endif
 734         "ubi skipcheck volume on/off - Set or clear skip_check flag in volume header\n"
 735         "[Legends]\n"
 736         " volume: character name\n"
 737         " size: specified in bytes\n"
 738         " type: s[tatic] or d[ynamic] (default=dynamic)"
 739 );