lwext4/ext4_mkfs.c

   1 /*
   2  * Copyright (c) 2015 Grzegorz Kostka (kostka.grzegorz@gmail.com)
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup lwext4
  30  * @{
  31  */
  32 /**
  33  * @file  ext4_mkfs.c
  34  * @brief
  35  */
  36
  37 #include "ext4_config.h"
  38 #include "ext4_super.h"
  39 #include "ext4_block_group.h"
  40 #include "ext4_dir.h"
  41 #include "ext4_fs.h"
  42 #include "ext4_inode.h"
  43 #include "ext4_debug.h"
  44 #include "ext4_ialloc.h"
  45 #include "ext4_mkfs.h"
  46
  47 #include <inttypes.h>
  48 #include <string.h>
  49 #include <stdlib.h>
  50
  51 #define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y))
  52 #define EXT4_ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y)))
  53
  54 struct fs_aux_info {
  55         struct ext4_sblock *sb;
  56         struct ext4_bgroup *bg_desc;
  57         struct xattr_list_element *xattrs;
  58         uint32_t first_data_block;
  59         uint64_t len_blocks;
  60         uint32_t inode_table_blocks;
  61         uint32_t groups;
  62         uint32_t bg_desc_blocks;
  63         uint32_t default_i_flags;
  64         uint32_t blocks_per_ind;
  65         uint32_t blocks_per_dind;
  66         uint32_t blocks_per_tind;
  67 };
  68
  69 static inline int log_2(int j)
  70 {
  71         int i;
  72
  73         for (i = 0; j > 0; i++)
  74                 j >>= 1;
  75
  76         return i - 1;
  77 }
  78
  79 static int sb2info(struct ext4_sblock *sb, struct ext4_mkfs_info *info)
  80 {
  81         if (to_le16(sb->magic) != EXT4_SUPERBLOCK_MAGIC)
  82                 return EINVAL;
  83
  84         info->block_size = 1024 << to_le32(sb->log_block_size);
  85         info->blocks_per_group = to_le32(sb->blocks_per_group);
  86         info->inodes_per_group = to_le32(sb->inodes_per_group);
  87         info->inode_size = to_le16(sb->inode_size);
  88         info->inodes = to_le32(sb->inodes_count);
  89         info->feat_ro_compat = to_le32(sb->features_read_only);
  90         info->feat_compat = to_le32(sb->features_compatible);
  91         info->feat_incompat = to_le32(sb->features_incompatible);
  92         info->bg_desc_reserve_blocks = to_le16(sb->s_reserved_gdt_blocks);
  93         info->label = sb->volume_name;
  94         info->len = (uint64_t)info->block_size * ext4_sb_get_blocks_cnt(sb);
  95
  96         return EOK;
  97 }
  98
  99 static uint32_t compute_blocks_per_group(struct ext4_mkfs_info *info)
 100 {
 101         return info->block_size * 8;
 102 }
 103
 104 static uint32_t compute_inodes(struct ext4_mkfs_info *info)
 105 {
 106         return DIV_ROUND_UP(info->len, info->block_size) / 4;
 107 }
 108
 109 static uint32_t compute_inodes_per_group(struct ext4_mkfs_info *info)
 110 {
 111         uint32_t blocks = DIV_ROUND_UP(info->len, info->block_size);
 112         uint32_t block_groups = DIV_ROUND_UP(blocks, info->blocks_per_group);
 113         uint32_t inodes = DIV_ROUND_UP(info->inodes, block_groups);
 114         inodes = EXT4_ALIGN(inodes, (info->block_size / info->inode_size));
 115
 116         /* After properly rounding up the number of inodes/group,
 117          * make sure to update the total inodes field in the info struct.
 118          */
 119         info->inodes = inodes * block_groups;
 120
 121         return inodes;
 122 }
 123
 124
 125 static uint32_t compute_journal_blocks(struct ext4_mkfs_info *info)
 126 {
 127         uint32_t journal_blocks = DIV_ROUND_UP(info->len, info->block_size) / 64;
 128         if (journal_blocks < 1024)
 129                 journal_blocks = 1024;
 130         if (journal_blocks > 32768)
 131                 journal_blocks = 32768;
 132         return journal_blocks;
 133 }
 134
 135 static bool has_superblock(struct ext4_mkfs_info *info, uint32_t bgid)
 136 {
 137         if (!(info->feat_ro_compat & EXT4_FRO_COM_SPARSE_SUPER))
 138                 return true;
 139
 140         return ext4_sb_sparse(bgid);
 141 }
 142
 143 static int create_fs_aux_info(struct fs_aux_info *aux_info,
 144                               struct ext4_mkfs_info *info)
 145 {
 146         aux_info->first_data_block = (info->block_size > 1024) ? 0 : 1;
 147         aux_info->len_blocks = info->len / info->block_size;
 148         aux_info->inode_table_blocks = DIV_ROUND_UP(info->inodes_per_group *
 149                         info->inode_size, info->block_size);
 150         aux_info->groups = DIV_ROUND_UP(aux_info->len_blocks -
 151                         aux_info->first_data_block, info->blocks_per_group);
 152         aux_info->blocks_per_ind = info->block_size / sizeof(uint32_t);
 153         aux_info->blocks_per_dind =
 154                         aux_info->blocks_per_ind * aux_info->blocks_per_ind;
 155         aux_info->blocks_per_tind =
 156                         aux_info->blocks_per_dind * aux_info->blocks_per_dind;
 157
 158         aux_info->bg_desc_blocks =
 159                 DIV_ROUND_UP(aux_info->groups * sizeof(struct ext4_bgroup),
 160                         info->block_size);
 161
 162         aux_info->default_i_flags = EXT4_INODE_FLAG_NOATIME;
 163
 164         uint32_t last_group_size = aux_info->len_blocks % info->blocks_per_group;
 165         uint32_t last_header_size = 2 + aux_info->inode_table_blocks;
 166         if (has_superblock(info, aux_info->groups - 1))
 167                 last_header_size += 1 + aux_info->bg_desc_blocks +
 168                         info->bg_desc_reserve_blocks;
 169
 170         if (last_group_size > 0 && last_group_size < last_header_size) {
 171                 aux_info->groups--;
 172                 aux_info->len_blocks -= last_group_size;
 173         }
 174
 175         aux_info->sb = calloc(1, EXT4_SUPERBLOCK_SIZE);
 176         if (!aux_info->sb)
 177                 return ENOMEM;
 178
 179         aux_info->bg_desc = calloc(aux_info->groups, sizeof(struct ext4_bgroup));
 180         if (!aux_info->bg_desc)
 181                 return ENOMEM;
 182
 183         aux_info->xattrs = NULL;
 184         return EOK;
 185 }
 186
 187 static void release_fs_aux_info(struct fs_aux_info *aux_info)
 188 {
 189         if (aux_info->sb)
 190                 free(aux_info->sb);
 191         if (aux_info->bg_desc)
 192                 free(aux_info->bg_desc);
 193 }
 194
 195
 196 /* Fill in the superblock memory buffer based on the filesystem parameters */
 197 static void fill_in_sb(struct fs_aux_info *aux_info, struct ext4_mkfs_info *info)
 198 {
 199         struct ext4_sblock *sb = aux_info->sb;
 200
 201         sb->inodes_count = to_le32(info->inodes_per_group * aux_info->groups);
 202
 203         ext4_sb_set_blocks_cnt(sb, aux_info->len_blocks);
 204         ext4_sb_set_free_blocks_cnt(sb, aux_info->len_blocks);
 205         sb->free_inodes_count = to_le32(info->inodes_per_group * aux_info->groups);
 206
 207         sb->reserved_blocks_count_lo = to_le32(0);
 208         sb->first_data_block = to_le32(aux_info->first_data_block);
 209         sb->log_block_size = to_le32(log_2(info->block_size / 1024));
 210         sb->log_cluster_size = to_le32(log_2(info->block_size / 1024));
 211         sb->blocks_per_group = to_le32(info->blocks_per_group);
 212         sb->frags_per_group = to_le32(info->blocks_per_group);
 213         sb->inodes_per_group = to_le32(info->inodes_per_group);
 214         sb->mount_time = to_le32(0);
 215         sb->write_time = to_le32(0);
 216         sb->mount_count = to_le16(0);
 217         sb->max_mount_count = to_le16(0xFFFF);
 218         sb->magic = to_le16(EXT4_SUPERBLOCK_MAGIC);
 219         sb->state = to_le16(EXT4_SUPERBLOCK_STATE_VALID_FS);
 220         sb->errors = to_le16(EXT4_SUPERBLOCK_ERRORS_RO);
 221         sb->minor_rev_level = to_le16(0);
 222         sb->last_check_time = to_le32(0);
 223         sb->check_interval = to_le32(0);
 224         sb->creator_os = to_le32(EXT4_SUPERBLOCK_OS_LINUX);
 225         sb->rev_level = to_le32(1);
 226         sb->def_resuid = to_le16(0);
 227         sb->def_resgid = to_le16(0);
 228
 229         sb->first_inode = to_le32(EXT4_GOOD_OLD_FIRST_INO);
 230         sb->inode_size = to_le16(info->inode_size);
 231         sb->block_group_index = to_le16(0);
 232
 233         sb->features_compatible = to_le32(info->feat_compat);
 234         sb->features_incompatible = to_le32(info->feat_incompat);
 235         sb->features_read_only = to_le32(info->feat_ro_compat);
 236
 237         memset(sb->uuid, 0, sizeof(sb->uuid));
 238
 239         memset(sb->volume_name, 0, sizeof(sb->volume_name));
 240         strncpy(sb->volume_name, info->label, sizeof(sb->volume_name));
 241         memset(sb->last_mounted, 0, sizeof(sb->last_mounted));
 242
 243         sb->algorithm_usage_bitmap = to_le32(0);
 244         sb->s_prealloc_blocks = 0;
 245         sb->s_prealloc_dir_blocks = 0;
 246         sb->s_reserved_gdt_blocks = to_le16(info->bg_desc_reserve_blocks);
 247
 248         if (info->feat_compat & EXT4_FCOM_HAS_JOURNAL)
 249                 sb->journal_inode_number = to_le32(EXT4_JOURNAL_INO);
 250         sb->journal_dev = to_le32(0);
 251         sb->last_orphan = to_le32(0);
 252         memset(sb->hash_seed, 0, sizeof(sb->hash_seed));
 253         sb->default_hash_version = EXT2_HTREE_HALF_MD4;
 254         sb->checksum_type = 1;
 255         sb->desc_size = to_le16(EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE);
 256         sb->default_mount_opts = to_le32(0);
 257         sb->first_meta_bg = to_le32(0);
 258         sb->mkfs_time = to_le32(0);
 259
 260         sb->reserved_blocks_count_hi = to_le32(0);
 261         sb->min_extra_isize = to_le32(sizeof(struct ext4_inode) -
 262                 EXT4_GOOD_OLD_INODE_SIZE);
 263         sb->want_extra_isize = to_le32(sizeof(struct ext4_inode) -
 264                 EXT4_GOOD_OLD_INODE_SIZE);
 265         sb->flags = to_le32(2);
 266 }
 267
 268 static void fill_bgroups(struct fs_aux_info *aux_info,
 269                          struct ext4_mkfs_info *info)
 270 {
 271         uint32_t i;
 272
 273         uint64_t bg_free_blk = 0;
 274         uint64_t sb_free_blk = 0;
 275
 276         for (i = 0; i < aux_info->groups; i++) {
 277
 278                 uint64_t bg_start_block = aux_info->first_data_block +
 279                         aux_info->first_data_block + i * info->blocks_per_group;
 280                 uint32_t blk_off = 0;
 281
 282                 bg_free_blk = info->blocks_per_group -
 283                         (aux_info->inode_table_blocks + aux_info->bg_desc_blocks);
 284
 285                 bg_free_blk -= 2;
 286                 blk_off += aux_info->bg_desc_blocks;
 287
 288                 if (has_superblock(info, i)) {
 289                         bg_start_block++;
 290                         blk_off += info->bg_desc_reserve_blocks;
 291                         bg_free_blk -= info->bg_desc_reserve_blocks + 1;
 292                 }
 293
 294                 ext4_bg_set_block_bitmap(&aux_info->bg_desc[i], aux_info->sb,
 295                                 bg_start_block + blk_off + 1);
 296
 297                 ext4_bg_set_inode_bitmap(&aux_info->bg_desc[i], aux_info->sb,
 298                                 bg_start_block + blk_off + 2);
 299
 300                 ext4_bg_set_inode_table_first_block(&aux_info->bg_desc[i],
 301                                 aux_info->sb,
 302                                 bg_start_block + blk_off + 3);
 303
 304                 ext4_bg_set_free_blocks_count(&aux_info->bg_desc[i],
 305                                 aux_info->sb, bg_free_blk);
 306
 307                 ext4_bg_set_free_inodes_count(&aux_info->bg_desc[i],
 308                                 aux_info->sb, aux_info->sb->inodes_per_group);
 309
 310                 ext4_bg_set_used_dirs_count(&aux_info->bg_desc[i], aux_info->sb,
 311                                             0);
 312
 313                 ext4_bg_set_flag(&aux_info->bg_desc[i],
 314                                 EXT4_BLOCK_GROUP_BLOCK_UNINIT |
 315                                 EXT4_BLOCK_GROUP_INODE_UNINIT);
 316
 317                 sb_free_blk += bg_free_blk;
 318         }
 319
 320         ext4_sb_set_free_blocks_cnt(aux_info->sb, sb_free_blk);
 321 }
 322
 323
 324 static int write_bgroups(struct ext4_blockdev *bd, struct fs_aux_info *aux_info,
 325                          struct ext4_mkfs_info *info)
 326 {
 327         int r;
 328         uint32_t i;
 329         struct ext4_block b;
 330         for (i = 0; i < aux_info->groups; i++) {
 331                 uint64_t bg_start_block = aux_info->first_data_block +
 332                         aux_info->first_data_block + i * info->blocks_per_group;
 333                 uint32_t blk_off = 0;
 334
 335                 blk_off += aux_info->bg_desc_blocks;
 336                 if (has_superblock(info, i)) {
 337                         bg_start_block++;
 338                         blk_off += info->bg_desc_reserve_blocks;
 339                 }
 340
 341                 uint32_t block_size = ext4_sb_get_block_size(aux_info->sb);
 342                 uint32_t dsc_pos = 0;
 343                 uint32_t dsc_id = 0;
 344                 uint32_t dsc_size = ext4_sb_get_desc_size(aux_info->sb);
 345                 uint32_t dsc_blk_cnt = aux_info->bg_desc_blocks;
 346                 uint64_t dsc_blk = bg_start_block;
 347
 348                 while (dsc_blk_cnt--) {
 349                         r = ext4_block_get(bd, &b, dsc_blk++);
 350                         if (r != EOK)
 351                                 return r;
 352
 353                         while (dsc_pos + dsc_size < block_size) {
 354                                 memcpy(b.data + dsc_pos,
 355                                        &aux_info->bg_desc[dsc_id],
 356                                        dsc_size);
 357
 358                                 dsc_pos += dsc_size;
 359                                 dsc_id++;
 360                         }
 361
 362                         b.dirty = true;
 363                         r = ext4_block_set(bd, &b);
 364                         if (r != EOK)
 365                                 return r;
 366                 }
 367
 368                 r = ext4_block_get_noread(bd, &b, bg_start_block + blk_off + 1);
 369                 if (r != EOK)
 370                         return r;
 371                 memset(b.data, 0, block_size);
 372                 b.dirty = true;
 373                 r = ext4_block_set(bd, &b);
 374                 if (r != EOK)
 375                         return r;
 376                 r = ext4_block_get_noread(bd, &b, bg_start_block + blk_off + 2);
 377                 if (r != EOK)
 378                         return r;
 379                 memset(b.data, 0, block_size);
 380                 b.dirty = true;
 381                 r = ext4_block_set(bd, &b);
 382                 if (r != EOK)
 383                         return r;
 384         }
 385
 386
 387         return r;
 388 }
 389
 390 static int write_sblocks(struct ext4_blockdev *bd, struct fs_aux_info *aux_info,
 391                           struct ext4_mkfs_info *info)
 392 {
 393         uint64_t offset;
 394         uint32_t i;
 395         int r;
 396
 397         /* write out the backup superblocks */
 398         for (i = 1; i < aux_info->groups; i++) {
 399                 if (has_superblock(info, i)) {
 400                         offset = info->block_size * (aux_info->first_data_block
 401                                 + i * info->blocks_per_group);
 402
 403                         aux_info->sb->block_group_index = i;
 404                         r = ext4_block_writebytes(bd, offset, aux_info->sb,
 405                                                   EXT4_SUPERBLOCK_SIZE);
 406                         if (r != EOK)
 407                                 return r;
 408                 }
 409         }
 410
 411         /* write out the primary superblock */
 412         aux_info->sb->block_group_index = 0;
 413         return ext4_block_writebytes(bd, 1024, aux_info->sb,
 414                         EXT4_SUPERBLOCK_SIZE);
 415 }
 416
 417
 418 int ext4_mkfs_read_info(struct ext4_blockdev *bd, struct ext4_mkfs_info *info)
 419 {
 420         int r;
 421         struct ext4_sblock *sb = NULL;
 422         r = ext4_block_init(bd);
 423         if (r != EOK)
 424                 return r;
 425
 426         sb = malloc(EXT4_SUPERBLOCK_SIZE);
 427         if (!sb)
 428                 goto Finish;
 429
 430
 431         r = ext4_sb_read(bd, sb);
 432         if (r != EOK)
 433                 goto Finish;
 434
 435         r = sb2info(sb, info);
 436
 437 Finish:
 438         if (sb)
 439                 free(sb);
 440         ext4_block_fini(bd);
 441         return r;
 442 }
 443
 444 static int mkfs_initial(struct ext4_blockdev *bd, struct ext4_mkfs_info *info)
 445 {
 446         int r;
 447         struct fs_aux_info aux_info;
 448         memset(&aux_info, 0, sizeof(struct fs_aux_info));
 449
 450         r = create_fs_aux_info(&aux_info, info);
 451         if (r != EOK)
 452                 goto Finish;
 453
 454         fill_in_sb(&aux_info, info);
 455         fill_bgroups(&aux_info, info);
 456
 457
 458         r = write_bgroups(bd, &aux_info, info);
 459         if (r != EOK)
 460                 goto Finish;
 461
 462         r = write_sblocks(bd, &aux_info, info);
 463         if (r != EOK)
 464                 goto Finish;
 465
 466         Finish:
 467         release_fs_aux_info(&aux_info);
 468         return r;
 469 }
 470
 471 static int init_bgs(struct ext4_fs *fs)
 472 {
 473         int r = EOK;
 474         struct ext4_block_group_ref ref;
 475         uint32_t i;
 476         uint32_t bg_count = ext4_block_group_cnt(&fs->sb);
 477         for (i = 0; i < bg_count; ++i) {
 478                 r = ext4_fs_get_block_group_ref(fs, i, &ref);
 479                 if (r != EOK)
 480                         break;
 481
 482                 r = ext4_fs_put_block_group_ref(&ref);
 483                 if (r != EOK)
 484                         break;
 485         }
 486         return r;
 487 }
 488
 489 static int alloc_inodes(struct ext4_fs *fs)
 490 {
 491         int r = EOK;
 492         int i;
 493         struct ext4_inode_ref inode_ref;
 494         for (i = 1; i < 12; ++i) {
 495                 int filetype = EXT4_DIRENTRY_REG_FILE;
 496
 497                 switch (i) {
 498                 case EXT4_ROOT_INO:
 499                 case EXT4_GOOD_OLD_FIRST_INO:
 500                         filetype = EXT4_DIRENTRY_DIR;
 501                         break;
 502                 }
 503
 504                 r = ext4_fs_alloc_inode(fs, &inode_ref, filetype);
 505                 if (r != EOK)
 506                         return r;
 507
 508                 ext4_inode_set_mode(&fs->sb, inode_ref.inode, 0);
 509                 ext4_fs_put_inode_ref(&inode_ref);
 510         }
 511
 512         return r;
 513 }
 514
 515 static int create_dirs(struct ext4_fs *fs)
 516 {
 517         int r = EOK;
 518         struct ext4_inode_ref root;
 519         struct ext4_inode_ref child;
 520
 521         r = ext4_fs_get_inode_ref(fs, EXT4_ROOT_INO, &root);
 522         if (r != EOK)
 523                 return r;
 524
 525         r = ext4_fs_get_inode_ref(fs, EXT4_GOOD_OLD_FIRST_INO, &child);
 526         if (r != EOK)
 527                 return r;
 528
 529         ext4_inode_set_mode(&fs->sb, child.inode,
 530                         EXT4_INODE_MODE_DIRECTORY | 0777);
 531
 532         ext4_inode_set_mode(&fs->sb, root.inode,
 533                         EXT4_INODE_MODE_DIRECTORY | 0777);
 534
 535         r = ext4_dir_add_entry(&root, ".", strlen("."), &root);
 536         if (r != EOK)
 537                 return r;
 538
 539         r = ext4_dir_add_entry(&root, "..", strlen(".."), &root);
 540         if (r != EOK)
 541                 return r;
 542
 543         r = ext4_dir_add_entry(&child, ".", strlen("."), &child);
 544         if (r != EOK)
 545                 return r;
 546
 547         r = ext4_dir_add_entry(&child, "..", strlen(".."), &root);
 548         if (r != EOK)
 549                 return r;
 550
 551         r = ext4_dir_add_entry(&root, "lost+found", strlen("lost+found"), &child);
 552         if (r != EOK)
 553                 return r;
 554
 555         ext4_inode_set_links_count(root.inode, 3);
 556         ext4_inode_set_links_count(child.inode, 2);
 557
 558         ext4_fs_put_inode_ref(&child);
 559         ext4_fs_put_inode_ref(&root);
 560         return r;
 561 }
 562
 563 int ext4_mkfs(struct ext4_fs *fs, struct ext4_blockdev *bd,
 564               struct ext4_mkfs_info *info)
 565 {
 566         int r;
 567
 568         r = ext4_block_init(bd);
 569         if (r != EOK)
 570                 return r;
 571
 572         if (info->len == 0)
 573                 info->len = bd->ph_bcnt * bd->ph_bsize;
 574
 575         if (info->block_size == 0)
 576                 info->block_size = 4096; /*Set block size to default value*/
 577
 578         /* Round down the filesystem length to be a multiple of the block size */
 579         info->len &= ~((uint64_t)info->block_size - 1);
 580
 581         if (info->journal_blocks == 0)
 582                 info->journal_blocks = compute_journal_blocks(info);
 583
 584         if (info->blocks_per_group == 0)
 585                 info->blocks_per_group = compute_blocks_per_group(info);
 586
 587         if (info->inodes == 0)
 588                 info->inodes = compute_inodes(info);
 589
 590         if (info->inode_size == 0)
 591                 info->inode_size = 256;
 592
 593         if (info->label == NULL)
 594                 info->label = "";
 595
 596         info->inodes_per_group = compute_inodes_per_group(info);
 597
 598         info->feat_compat = EXT3_SUPPORTED_FCOM;
 599         info->feat_ro_compat = EXT3_SUPPORTED_FRO_COM;
 600         info->feat_incompat = EXT3_SUPPORTED_FINCOM;
 601
 602         info->feat_incompat &= ~EXT4_FINCOM_META_BG;
 603
 604         if (info->no_journal == 0)
 605                 info->feat_compat |= 0;
 606
 607         info->bg_desc_reserve_blocks = 0;
 608
 609         ext4_dbg(DEBUG_MKFS, DBG_INFO "Creating filesystem with parameters:\n");
 610         ext4_dbg(DEBUG_MKFS, DBG_NONE "Size: %"PRIu64"\n", info->len);
 611         ext4_dbg(DEBUG_MKFS, DBG_NONE "Block size: %"PRIu32"\n",
 612                         info->block_size);
 613         ext4_dbg(DEBUG_MKFS, DBG_NONE "Blocks per group: %"PRIu32"\n",
 614                         info->blocks_per_group);
 615         ext4_dbg(DEBUG_MKFS, DBG_NONE "Inodes per group: %"PRIu32"\n",
 616                         info->inodes_per_group);
 617         ext4_dbg(DEBUG_MKFS, DBG_NONE "Inode size: %"PRIu32"\n",
 618                         info->inode_size);
 619         ext4_dbg(DEBUG_MKFS, DBG_NONE "Inodes: %"PRIu32"\n", info->inodes);
 620         ext4_dbg(DEBUG_MKFS, DBG_NONE "Journal blocks: %"PRIu32"\n",
 621                         info->journal_blocks);
 622         ext4_dbg(DEBUG_MKFS, DBG_NONE "Features ro_compat: 0x%x\n",
 623                         info->feat_ro_compat);
 624         ext4_dbg(DEBUG_MKFS, DBG_NONE "Features compat: 0x%x\n",
 625                         info->feat_compat);
 626         ext4_dbg(DEBUG_MKFS, DBG_NONE "Features incompat: 0x%x\n",
 627                         info->feat_incompat);
 628         ext4_dbg(DEBUG_MKFS, DBG_NONE "BG desc reserve: %"PRIu32"\n",
 629                         info->bg_desc_reserve_blocks);
 630         ext4_dbg(DEBUG_MKFS, DBG_NONE "journal: %s\n",
 631                         !info->no_journal ? "yes" : "no");
 632         ext4_dbg(DEBUG_MKFS, DBG_NONE "Label: %s\n", info->label);
 633
 634         struct ext4_bcache bc;
 635         memset(&bc, 0, sizeof(struct ext4_bcache));
 636         ext4_block_set_lb_size(bd, info->block_size);
 637         r = ext4_bcache_init_dynamic(&bc, CONFIG_BLOCK_DEV_CACHE_SIZE,
 638                                       info->block_size);
 639         if (r != EOK)
 640                 goto block_fini;
 641
 642         /*Bind block cache to block device*/
 643         r = ext4_block_bind_bcache(bd, &bc);
 644         if (r != EOK)
 645                 goto cache_fini;
 646
 647         r = ext4_block_cache_write_back(bd, 0);
 648         if (r != EOK)
 649                 goto cache_fini;
 650
 651         r = mkfs_initial(bd, info);
 652         if (r != EOK)
 653                 goto cache_fini;
 654
 655         r = ext4_fs_init(fs, bd);
 656         if (r != EOK)
 657                 goto cache_fini;
 658
 659         r = init_bgs(fs);
 660         if (r != EOK)
 661                 goto fs_fini;
 662
 663         r = alloc_inodes(fs);
 664         if (r != EOK)
 665                 goto fs_fini;
 666
 667         r = create_dirs(fs);
 668         if (r != EOK)
 669                 goto fs_fini;
 670
 671         fs_fini:
 672         ext4_fs_fini(fs);
 673
 674         cache_fini:
 675         ext4_bcache_fini_dynamic(&bc);
 676
 677         block_fini:
 678         ext4_block_fini(bd);
 679
 680         return r;
 681 }
 682
 683 /**
 684  * @}
 685  */