src/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_types.h>
  39 #include <ext4_misc.h>
  40 #include <ext4_errno.h>
  41 #include <ext4_debug.h>
  42
  43 #include <ext4_super.h>
  44 #include <ext4_block_group.h>
  45 #include <ext4_dir.h>
  46 #include <ext4_dir_idx.h>
  47 #include <ext4_fs.h>
  48 #include <ext4_inode.h>
  49 #include <ext4_ialloc.h>
  50 #include <ext4_mkfs.h>
  51
  52 #include <inttypes.h>
  53 #include <string.h>
  54 #include <stdlib.h>
  55
  56 struct fs_aux_info {
  57         struct ext4_sblock *sb;
  58         uint8_t *bg_desc_blk;
  59         struct xattr_list_element *xattrs;
  60         uint32_t first_data_block;
  61         uint64_t len_blocks;
  62         uint32_t inode_table_blocks;
  63         uint32_t groups;
  64         uint32_t bg_desc_blocks;
  65         uint32_t default_i_flags;
  66         uint32_t blocks_per_ind;
  67         uint32_t blocks_per_dind;
  68         uint32_t blocks_per_tind;
  69 };
  70
  71 static inline int log_2(int j)
  72 {
  73         int i;
  74
  75         for (i = 0; j > 0; i++)
  76                 j >>= 1;
  77
  78         return i - 1;
  79 }
  80
  81 static int sb2info(struct ext4_sblock *sb, struct ext4_mkfs_info *info)
  82 {
  83         if (to_le16(sb->magic) != EXT4_SUPERBLOCK_MAGIC)
  84                 return EINVAL;
  85
  86         info->block_size = 1024 << to_le32(sb->log_block_size);
  87         info->blocks_per_group = to_le32(sb->blocks_per_group);
  88         info->inodes_per_group = to_le32(sb->inodes_per_group);
  89         info->inode_size = to_le16(sb->inode_size);
  90         info->inodes = to_le32(sb->inodes_count);
  91         info->feat_ro_compat = to_le32(sb->features_read_only);
  92         info->feat_compat = to_le32(sb->features_compatible);
  93         info->feat_incompat = to_le32(sb->features_incompatible);
  94         info->bg_desc_reserve_blocks = to_le16(sb->s_reserved_gdt_blocks);
  95         info->label = sb->volume_name;
  96         info->len = (uint64_t)info->block_size * ext4_sb_get_blocks_cnt(sb);
  97         info->dsc_size = to_le16(sb->desc_size);
  98         memcpy(info->uuid, sb->uuid, UUID_SIZE);
  99
 100         return EOK;
 101 }
 102
 103 static uint32_t compute_blocks_per_group(struct ext4_mkfs_info *info)
 104 {
 105         return info->block_size * 8;
 106 }
 107
 108 static uint32_t compute_inodes(struct ext4_mkfs_info *info)
 109 {
 110         return (uint32_t)EXT4_DIV_ROUND_UP(info->len, info->block_size) / 4;
 111 }
 112
 113 static uint32_t compute_inodes_per_group(struct ext4_mkfs_info *info)
 114 {
 115         uint32_t blocks = (uint32_t)EXT4_DIV_ROUND_UP(info->len, info->block_size);
 116         uint32_t block_groups = EXT4_DIV_ROUND_UP(blocks, info->blocks_per_group);
 117         uint32_t inodes = EXT4_DIV_ROUND_UP(info->inodes, block_groups);
 118         inodes = EXT4_ALIGN(inodes, (info->block_size / info->inode_size));
 119
 120         /* After properly rounding up the number of inodes/group,
 121          * make sure to update the total inodes field in the info struct.
 122          */
 123         info->inodes = inodes * block_groups;
 124
 125         return inodes;
 126 }
 127
 128
 129 static uint32_t compute_journal_blocks(struct ext4_mkfs_info *info)
 130 {
 131         uint32_t journal_blocks = (uint32_t)EXT4_DIV_ROUND_UP(info->len,
 132                                                  info->block_size) / 64;
 133         if (journal_blocks < 1024)
 134                 journal_blocks = 1024;
 135         if (journal_blocks > 32768)
 136                 journal_blocks = 32768;
 137         return journal_blocks;
 138 }
 139
 140 static bool has_superblock(struct ext4_mkfs_info *info, uint32_t bgid)
 141 {
 142         if (!(info->feat_ro_compat & EXT4_FRO_COM_SPARSE_SUPER))
 143                 return true;
 144
 145         return ext4_sb_sparse(bgid);
 146 }
 147
 148 static int create_fs_aux_info(struct fs_aux_info *aux_info,
 149                               struct ext4_mkfs_info *info)
 150 {
 151         aux_info->first_data_block = (info->block_size > 1024) ? 0 : 1;
 152         aux_info->len_blocks = info->len / info->block_size;
 153         aux_info->inode_table_blocks = EXT4_DIV_ROUND_UP(info->inodes_per_group *
 154                         info->inode_size, info->block_size);
 155         aux_info->groups = (uint32_t)EXT4_DIV_ROUND_UP(aux_info->len_blocks -
 156                         aux_info->first_data_block, info->blocks_per_group);
 157         aux_info->blocks_per_ind = info->block_size / sizeof(uint32_t);
 158         aux_info->blocks_per_dind =
 159                         aux_info->blocks_per_ind * aux_info->blocks_per_ind;
 160         aux_info->blocks_per_tind =
 161                         aux_info->blocks_per_dind * aux_info->blocks_per_dind;
 162
 163         aux_info->bg_desc_blocks =
 164                 EXT4_DIV_ROUND_UP(aux_info->groups * info->dsc_size,
 165                         info->block_size);
 166
 167         aux_info->default_i_flags = EXT4_INODE_FLAG_NOATIME;
 168
 169         uint32_t last_group_size = aux_info->len_blocks % info->blocks_per_group;
 170         uint32_t last_header_size = 2 + aux_info->inode_table_blocks;
 171         if (has_superblock(info, aux_info->groups - 1))
 172                 last_header_size += 1 + aux_info->bg_desc_blocks +
 173                         info->bg_desc_reserve_blocks;
 174
 175         if (last_group_size > 0 && last_group_size < last_header_size) {
 176                 aux_info->groups--;
 177                 aux_info->len_blocks -= last_group_size;
 178         }
 179
 180         aux_info->sb = ext4_calloc(1, EXT4_SUPERBLOCK_SIZE);
 181         if (!aux_info->sb)
 182                 return ENOMEM;
 183
 184         aux_info->bg_desc_blk = ext4_calloc(1, info->block_size);
 185         if (!aux_info->bg_desc_blk)
 186                 return ENOMEM;
 187
 188         aux_info->xattrs = NULL;
 189
 190
 191         ext4_dbg(DEBUG_MKFS, DBG_INFO "create_fs_aux_info\n");
 192         ext4_dbg(DEBUG_MKFS, DBG_NONE "first_data_block: %"PRIu32"\n",
 193                         aux_info->first_data_block);
 194         ext4_dbg(DEBUG_MKFS, DBG_NONE "len_blocks: %"PRIu64"\n",
 195                         aux_info->len_blocks);
 196         ext4_dbg(DEBUG_MKFS, DBG_NONE "inode_table_blocks: %"PRIu32"\n",
 197                         aux_info->inode_table_blocks);
 198         ext4_dbg(DEBUG_MKFS, DBG_NONE "groups: %"PRIu32"\n",
 199                         aux_info->groups);
 200         ext4_dbg(DEBUG_MKFS, DBG_NONE "bg_desc_blocks: %"PRIu32"\n",
 201                         aux_info->bg_desc_blocks);
 202         ext4_dbg(DEBUG_MKFS, DBG_NONE "default_i_flags: %"PRIu32"\n",
 203                         aux_info->default_i_flags);
 204         ext4_dbg(DEBUG_MKFS, DBG_NONE "blocks_per_ind: %"PRIu32"\n",
 205                         aux_info->blocks_per_ind);
 206         ext4_dbg(DEBUG_MKFS, DBG_NONE "blocks_per_dind: %"PRIu32"\n",
 207                         aux_info->blocks_per_dind);
 208         ext4_dbg(DEBUG_MKFS, DBG_NONE "blocks_per_tind: %"PRIu32"\n",
 209                         aux_info->blocks_per_tind);
 210
 211         return EOK;
 212 }
 213
 214 static void release_fs_aux_info(struct fs_aux_info *aux_info)
 215 {
 216         if (aux_info->sb)
 217                 ext4_free(aux_info->sb);
 218         if (aux_info->bg_desc_blk)
 219                 ext4_free(aux_info->bg_desc_blk);
 220 }
 221
 222
 223 /* Fill in the superblock memory buffer based on the filesystem parameters */
 224 static void fill_sb(struct fs_aux_info *aux_info, struct ext4_mkfs_info *info)
 225 {
 226         struct ext4_sblock *sb = aux_info->sb;
 227
 228         sb->inodes_count = to_le32(info->inodes_per_group * aux_info->groups);
 229
 230         ext4_sb_set_blocks_cnt(sb, aux_info->len_blocks);
 231         ext4_sb_set_free_blocks_cnt(sb, aux_info->len_blocks);
 232         sb->free_inodes_count = to_le32(info->inodes_per_group * aux_info->groups);
 233
 234         sb->reserved_blocks_count_lo = to_le32(0);
 235         sb->first_data_block = to_le32(aux_info->first_data_block);
 236         sb->log_block_size = to_le32(log_2(info->block_size / 1024));
 237         sb->log_cluster_size = to_le32(log_2(info->block_size / 1024));
 238         sb->blocks_per_group = to_le32(info->blocks_per_group);
 239         sb->frags_per_group = to_le32(info->blocks_per_group);
 240         sb->inodes_per_group = to_le32(info->inodes_per_group);
 241         sb->mount_time = to_le32(0);
 242         sb->write_time = to_le32(0);
 243         sb->mount_count = to_le16(0);
 244         sb->max_mount_count = to_le16(0xFFFF);
 245         sb->magic = to_le16(EXT4_SUPERBLOCK_MAGIC);
 246         sb->state = to_le16(EXT4_SUPERBLOCK_STATE_VALID_FS);
 247         sb->errors = to_le16(EXT4_SUPERBLOCK_ERRORS_RO);
 248         sb->minor_rev_level = to_le16(0);
 249         sb->last_check_time = to_le32(0);
 250         sb->check_interval = to_le32(0);
 251         sb->creator_os = to_le32(EXT4_SUPERBLOCK_OS_LINUX);
 252         sb->rev_level = to_le32(1);
 253         sb->def_resuid = to_le16(0);
 254         sb->def_resgid = to_le16(0);
 255
 256         sb->first_inode = to_le32(EXT4_GOOD_OLD_FIRST_INO);
 257         sb->inode_size = to_le16(info->inode_size);
 258         sb->block_group_index = to_le16(0);
 259
 260         sb->features_compatible = to_le32(info->feat_compat);
 261         sb->features_incompatible = to_le32(info->feat_incompat);
 262         sb->features_read_only = to_le32(info->feat_ro_compat);
 263
 264         memcpy(sb->uuid, info->uuid, UUID_SIZE);
 265
 266         memset(sb->volume_name, 0, sizeof(sb->volume_name));
 267         strncpy(sb->volume_name, info->label, sizeof(sb->volume_name) - 1);
 268         memset(sb->last_mounted, 0, sizeof(sb->last_mounted));
 269
 270         sb->algorithm_usage_bitmap = to_le32(0);
 271         sb->s_prealloc_blocks = 0;
 272         sb->s_prealloc_dir_blocks = 0;
 273         sb->s_reserved_gdt_blocks = to_le16(info->bg_desc_reserve_blocks);
 274
 275         if (info->feat_compat & EXT4_FCOM_HAS_JOURNAL)
 276                 sb->journal_inode_number = to_le32(EXT4_JOURNAL_INO);
 277
 278         sb->journal_backup_type = 1;
 279         sb->journal_dev = to_le32(0);
 280         sb->last_orphan = to_le32(0);
 281         sb->hash_seed[0] = to_le32(0x11111111);
 282         sb->hash_seed[1] = to_le32(0x22222222);
 283         sb->hash_seed[2] = to_le32(0x33333333);
 284         sb->hash_seed[3] = to_le32(0x44444444);
 285         sb->default_hash_version = EXT2_HTREE_HALF_MD4;
 286         sb->checksum_type = 1;
 287         sb->desc_size = to_le16(info->dsc_size);
 288         sb->default_mount_opts = to_le32(0);
 289         sb->first_meta_bg = to_le32(0);
 290         sb->mkfs_time = to_le32(0);
 291
 292         sb->reserved_blocks_count_hi = to_le32(0);
 293         sb->min_extra_isize = to_le32(sizeof(struct ext4_inode) -
 294                 EXT4_GOOD_OLD_INODE_SIZE);
 295         sb->want_extra_isize = to_le32(sizeof(struct ext4_inode) -
 296                 EXT4_GOOD_OLD_INODE_SIZE);
 297         sb->flags = to_le32(EXT4_SUPERBLOCK_FLAGS_SIGNED_HASH);
 298 }
 299
 300
 301 static int write_bgroups(struct ext4_fs *fs, struct ext4_blockdev *bd, struct fs_aux_info *aux_info,
 302                          struct ext4_mkfs_info *info, ext4_progress progress, void* progress_context)
 303 {
 304         /* size of the group descriptor */
 305         uint32_t dsc_size = ext4_sb_get_desc_size(aux_info->sb);
 306         uint32_t block_size = ext4_sb_get_block_size(aux_info->sb);
 307
 308         /* Calculate the group descriptors chunk that will be written to each block group */
 309
 310         /* The whole set of group descriptors */
 311         void* all_bg_desc = ext4_calloc(1, aux_info->groups * dsc_size);
 312         if (!all_bg_desc) {
 313                 return ENOMEM;
 314         }
 315
 316         uint32_t bg_free_blk = 0;
 317         uint64_t sb_free_blk = 0;
 318
 319         for (uint32_t i = 0; i < aux_info->groups; i++) {
 320                 uint64_t bg_start_block = aux_info->first_data_block +
 321                         aux_info->first_data_block + i * info->blocks_per_group;
 322                 uint32_t blk_off = 0;
 323
 324                 struct ext4_bgroup* bg_desc = (struct ext4_bgroup *) (((char *) all_bg_desc) + i * dsc_size);
 325
 326                 uint32_t blocks_in_group = info->blocks_per_group;
 327                 if (i == aux_info->groups - 1) {
 328                         blocks_in_group = (uint32_t)
 329                                 (ext4_sb_get_blocks_cnt(aux_info->sb) - ext4_get32(aux_info->sb, first_data_block) - info->blocks_per_group * (ext4_block_group_cnt(aux_info->sb) - 1));
 330                 }
 331
 332                 bg_free_blk = blocks_in_group - aux_info->inode_table_blocks;
 333
 334                 bg_free_blk -= 2;
 335                 blk_off += aux_info->bg_desc_blocks;
 336
 337                 if (i == (aux_info->groups - 1)) {
 338                         bg_free_blk -= aux_info->first_data_block;
 339                 }
 340
 341                 if (has_superblock(info, i)) {
 342                         bg_start_block++;
 343                         blk_off += info->bg_desc_reserve_blocks;
 344                         bg_free_blk -= info->bg_desc_reserve_blocks + 1;
 345                         bg_free_blk -= aux_info->bg_desc_blocks;
 346                 }
 347
 348                 ext4_bg_set_block_bitmap(bg_desc, aux_info->sb,
 349                                          bg_start_block + blk_off + 1);
 350
 351                 ext4_bg_set_inode_bitmap(bg_desc, aux_info->sb,
 352                                          bg_start_block + blk_off + 2);
 353
 354                 ext4_bg_set_inode_table_first_block(bg_desc,
 355                                                 aux_info->sb,
 356                                                 bg_start_block + blk_off + 3);
 357
 358                 ext4_bg_set_free_blocks_count(bg_desc, aux_info->sb,
 359                                               bg_free_blk);
 360
 361                 ext4_bg_set_free_inodes_count(bg_desc,
 362                                 aux_info->sb, to_le32(aux_info->sb->inodes_per_group));
 363
 364                 ext4_bg_set_used_dirs_count(bg_desc, aux_info->sb, 0);
 365
 366                 ext4_bg_set_flag(bg_desc,
 367                                  EXT4_BLOCK_GROUP_BLOCK_UNINIT |
 368                                  EXT4_BLOCK_GROUP_INODE_UNINIT);
 369
 370                 sb_free_blk += bg_free_blk;
 371         }
 372
 373         /* Write the block group headers */
 374
 375         int r = EOK;
 376
 377         for (uint32_t i = 0; i < aux_info->groups; i++) {
 378                 if (progress) {
 379                         progress(progress_context, (float) i / aux_info->groups);
 380                 }
 381
 382                 uint64_t bg_start_block = aux_info->first_data_block +
 383                         aux_info->first_data_block + i * info->blocks_per_group;
 384                 uint32_t blk_off = 0;
 385
 386                 if (has_superblock(info, i)) {
 387                         bg_start_block++;
 388                         blk_off += info->bg_desc_reserve_blocks;
 389                 }
 390
 391                 /* Group descriptors */
 392                 ext4_block_writebytes(bd, (bg_start_block + blk_off) * block_size, all_bg_desc, aux_info->groups * dsc_size);
 393
 394                 blk_off += aux_info->bg_desc_blocks;
 395
 396                 struct ext4_block_group_ref ref;
 397                 r = ext4_fs_get_block_group_ref(fs, i, &ref);
 398                 if (r != EOK) {
 399                         free(all_bg_desc);
 400                         break;
 401                 }
 402
 403                 r = ext4_fs_put_block_group_ref(&ref);
 404                 if (r != EOK) {
 405                         free(all_bg_desc);
 406                         break;
 407                 }
 408         }
 409
 410         free(all_bg_desc);
 411
 412         ext4_sb_set_free_blocks_cnt(aux_info->sb, sb_free_blk);
 413         return r;
 414 }
 415
 416 static int write_sblocks(struct ext4_blockdev *bd, struct fs_aux_info *aux_info,
 417                           struct ext4_mkfs_info *info)
 418 {
 419         uint64_t offset;
 420         uint32_t i;
 421         int r;
 422
 423         /* write out the backup superblocks */
 424         for (i = 1; i < aux_info->groups; i++) {
 425                 if (has_superblock(info, i)) {
 426                         offset = info->block_size * (aux_info->first_data_block
 427                                 + i * info->blocks_per_group);
 428
 429                         aux_info->sb->block_group_index = to_le16(i);
 430                         r = ext4_block_writebytes(bd, offset, aux_info->sb,
 431                                                   EXT4_SUPERBLOCK_SIZE);
 432                         if (r != EOK)
 433                                 return r;
 434                 }
 435         }
 436
 437         /* write out the primary superblock */
 438         aux_info->sb->block_group_index = to_le16(0);
 439         return ext4_block_writebytes(bd, 1024, aux_info->sb,
 440                         EXT4_SUPERBLOCK_SIZE);
 441 }
 442
 443
 444 int ext4_mkfs_read_info(struct ext4_blockdev *bd, struct ext4_mkfs_info *info)
 445 {
 446         int r;
 447         struct ext4_sblock *sb = NULL;
 448         r = ext4_block_init(bd);
 449         if (r != EOK)
 450                 return r;
 451
 452         sb = ext4_malloc(EXT4_SUPERBLOCK_SIZE);
 453         if (!sb)
 454                 goto Finish;
 455
 456
 457         r = ext4_sb_read(bd, sb);
 458         if (r != EOK)
 459                 goto Finish;
 460
 461         r = sb2info(sb, info);
 462
 463 Finish:
 464         if (sb)
 465                 ext4_free(sb);
 466         ext4_block_fini(bd);
 467         return r;
 468 }
 469
 470 static int mkfs_init(struct ext4_fs *fs, struct ext4_blockdev *bd, struct ext4_mkfs_info *info, ext4_progress progress, void* progress_context)
 471 {
 472         int r;
 473         struct fs_aux_info aux_info;
 474         memset(&aux_info, 0, sizeof(struct fs_aux_info));
 475
 476         r = create_fs_aux_info(&aux_info, info);
 477         if (r != EOK)
 478                 goto Finish;
 479
 480         fill_sb(&aux_info, info);
 481         memcpy(&fs->sb, aux_info.sb, sizeof(struct ext4_sblock));
 482
 483         ext4_dbg(DEBUG_MKFS, DBG_NONE "mkfs_init: write_bgroups");
 484         r = write_bgroups(fs, bd, &aux_info, info, progress, progress_context);
 485         if (r != EOK)
 486                 goto Finish;
 487
 488         ext4_dbg(DEBUG_MKFS, DBG_NONE "mkfs_init: write_sblocks");
 489         r = write_sblocks(bd, &aux_info, info);
 490         if (r != EOK)
 491                 goto Finish;
 492
 493         Finish:
 494         release_fs_aux_info(&aux_info);
 495         return r;
 496 }
 497
 498 static int alloc_inodes(struct ext4_fs *fs)
 499 {
 500         int r = EOK;
 501         int i;
 502         struct ext4_inode_ref inode_ref;
 503         for (i = 1; i < 12; ++i) {
 504                 int filetype = EXT4_DE_REG_FILE;
 505
 506                 switch (i) {
 507                 case EXT4_ROOT_INO:
 508                 case EXT4_GOOD_OLD_FIRST_INO:
 509                         filetype = EXT4_DE_DIR;
 510                         break;
 511                 default:
 512                         break;
 513                 }
 514
 515                 r = ext4_fs_alloc_inode(fs, &inode_ref, filetype);
 516                 if (r != EOK)
 517                         return r;
 518
 519                 ext4_inode_set_mode(&fs->sb, inode_ref.inode, 0);
 520
 521                 switch (i) {
 522                 case EXT4_ROOT_INO:
 523                 case EXT4_JOURNAL_INO:
 524                         ext4_fs_inode_blocks_init(fs, &inode_ref);
 525                         break;
 526                 }
 527
 528                 ext4_fs_put_inode_ref(&inode_ref);
 529         }
 530
 531         return r;
 532 }
 533
 534 static int create_dirs(struct ext4_fs *fs)
 535 {
 536         int r = EOK;
 537         struct ext4_inode_ref root;
 538         struct ext4_inode_ref child;
 539
 540         r = ext4_fs_get_inode_ref(fs, EXT4_ROOT_INO, &root);
 541         if (r != EOK)
 542                 return r;
 543
 544         r = ext4_fs_get_inode_ref(fs, EXT4_GOOD_OLD_FIRST_INO, &child);
 545         if (r != EOK)
 546                 return r;
 547
 548         ext4_inode_set_mode(&fs->sb, child.inode,
 549                         EXT4_INODE_MODE_DIRECTORY | 0777);
 550
 551         ext4_inode_set_mode(&fs->sb, root.inode,
 552                         EXT4_INODE_MODE_DIRECTORY | 0777);
 553
 554 #if CONFIG_DIR_INDEX_ENABLE
 555         /* Initialize directory index if supported */
 556         if (ext4_sb_feature_com(&fs->sb, EXT4_FCOM_DIR_INDEX)) {
 557                 r = ext4_dir_dx_init(&root, &root);
 558                 if (r != EOK)
 559                         return r;
 560
 561                 r = ext4_dir_dx_init(&child, &root);
 562                 if (r != EOK)
 563                         return r;
 564
 565                 ext4_inode_set_flag(root.inode, EXT4_INODE_FLAG_INDEX);
 566                 ext4_inode_set_flag(child.inode, EXT4_INODE_FLAG_INDEX);
 567         } else
 568 #endif
 569         {
 570                 r = ext4_dir_add_entry(&root, ".", strlen("."), &root);
 571                 if (r != EOK)
 572                         return r;
 573
 574                 r = ext4_dir_add_entry(&root, "..", strlen(".."), &root);
 575                 if (r != EOK)
 576                         return r;
 577
 578                 r = ext4_dir_add_entry(&child, ".", strlen("."), &child);
 579                 if (r != EOK)
 580                         return r;
 581
 582                 r = ext4_dir_add_entry(&child, "..", strlen(".."), &root);
 583                 if (r != EOK)
 584                         return r;
 585         }
 586
 587         r = ext4_dir_add_entry(&root, "lost+found", strlen("lost+found"), &child);
 588         if (r != EOK)
 589                 return r;
 590
 591         ext4_inode_set_links_cnt(root.inode, 3);
 592         ext4_inode_set_links_cnt(child.inode, 2);
 593
 594         child.dirty = true;
 595         root.dirty = true;
 596         ext4_fs_put_inode_ref(&child);
 597         ext4_fs_put_inode_ref(&root);
 598         return r;
 599 }
 600
 601 static int create_journal_inode(struct ext4_fs *fs,
 602                                 struct ext4_mkfs_info *info)
 603 {
 604         int ret;
 605         struct ext4_inode_ref inode_ref;
 606         uint64_t blocks_count;
 607
 608         if (!info->journal)
 609                 return EOK;
 610
 611         ret = ext4_fs_get_inode_ref(fs, EXT4_JOURNAL_INO, &inode_ref);
 612         if (ret != EOK)
 613                 return ret;
 614
 615         struct ext4_inode *inode = inode_ref.inode;
 616
 617         ext4_inode_set_mode(&fs->sb, inode, EXT4_INODE_MODE_FILE | 0600);
 618         ext4_inode_set_links_cnt(inode, 1);
 619
 620         blocks_count = ext4_inode_get_blocks_count(&fs->sb, inode);
 621
 622         while (blocks_count++ < info->journal_blocks)
 623         {
 624                 ext4_fsblk_t fblock;
 625                 ext4_lblk_t iblock;
 626                 struct ext4_block blk;
 627
 628                 ret = ext4_fs_append_inode_dblk(&inode_ref, &fblock, &iblock);
 629                 if (ret != EOK)
 630                         goto Finish;
 631
 632                 if (iblock != 0)
 633                         continue;
 634
 635                 ret = ext4_block_get(fs->bdev, &blk, fblock);
 636                 if (ret != EOK)
 637                         goto Finish;
 638
 639
 640                 struct jbd_sb * jbd_sb = (struct jbd_sb * )blk.data;
 641                 memset(jbd_sb, 0, sizeof(struct jbd_sb));
 642
 643                 jbd_sb->header.magic = to_be32(JBD_MAGIC_NUMBER);
 644                 jbd_sb->header.blocktype = to_be32(JBD_SUPERBLOCK_V2);
 645                 jbd_sb->blocksize = to_be32(info->block_size);
 646                 jbd_sb->maxlen = to_be32(info->journal_blocks);
 647                 jbd_sb->nr_users = to_be32(1);
 648                 jbd_sb->first = to_be32(1);
 649                 jbd_sb->sequence = to_be32(1);
 650
 651                 ext4_bcache_set_dirty(blk.buf);
 652                 ret = ext4_block_set(fs->bdev, &blk);
 653                 if (ret != EOK)
 654                         goto Finish;
 655         }
 656
 657         memcpy(fs->sb.journal_blocks, inode->blocks, sizeof(inode->blocks));
 658
 659         Finish:
 660         ext4_fs_put_inode_ref(&inode_ref);
 661
 662         return ret;
 663 }
 664
 665 int ext4_mkfs(struct ext4_fs *fs, struct ext4_blockdev *bd,
 666               struct ext4_mkfs_info *info, int fs_type, ext4_progress progress, void* progress_context)
 667 {
 668         int r;
 669
 670         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_mkfs start");
 671
 672         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_block_init");
 673
 674         r = ext4_block_init(bd);
 675         if (r != EOK)
 676                 return r;
 677
 678         bd->fs = fs;
 679
 680         if (info->len == 0)
 681                 info->len = bd->part_size;
 682
 683         if (info->block_size == 0)
 684                 info->block_size = 4096; /*Set block size to default value*/
 685
 686         /* Round down the filesystem length to be a multiple of the block size */
 687         info->len &= ~((uint64_t)info->block_size - 1);
 688
 689         if (info->journal_blocks == 0)
 690                 info->journal_blocks = compute_journal_blocks(info);
 691
 692         if (info->blocks_per_group == 0)
 693                 info->blocks_per_group = compute_blocks_per_group(info);
 694
 695         if (info->inodes == 0)
 696                 info->inodes = compute_inodes(info);
 697
 698         if (info->inode_size == 0)
 699                 info->inode_size = 256;
 700
 701         if (info->label == NULL)
 702                 info->label = "";
 703
 704         info->inodes_per_group = compute_inodes_per_group(info);
 705
 706         switch (fs_type) {
 707         case F_SET_EXT2:
 708                 info->feat_compat = EXT2_SUPPORTED_FCOM;
 709                 info->feat_ro_compat = EXT2_SUPPORTED_FRO_COM;
 710                 info->feat_incompat = EXT2_SUPPORTED_FINCOM;
 711                 break;
 712         case F_SET_EXT3:
 713                 info->feat_compat = EXT3_SUPPORTED_FCOM;
 714                 info->feat_ro_compat = EXT3_SUPPORTED_FRO_COM;
 715                 info->feat_incompat = EXT3_SUPPORTED_FINCOM;
 716                 break;
 717         case F_SET_EXT4:
 718                 info->feat_compat = EXT4_SUPPORTED_FCOM;
 719                 info->feat_ro_compat = EXT4_SUPPORTED_FRO_COM;
 720                 info->feat_incompat = EXT4_SUPPORTED_FINCOM;
 721                 break;
 722         }
 723
 724         /*TODO: handle this features some day...*/
 725         info->feat_incompat &= ~EXT4_FINCOM_META_BG;
 726         info->feat_incompat &= ~EXT4_FINCOM_FLEX_BG;
 727         info->feat_incompat &= ~EXT4_FINCOM_64BIT;
 728
 729         info->feat_ro_compat &= ~EXT4_FRO_COM_METADATA_CSUM;
 730         info->feat_ro_compat &= ~EXT4_FRO_COM_GDT_CSUM;
 731         info->feat_ro_compat &= ~EXT4_FRO_COM_DIR_NLINK;
 732         info->feat_ro_compat &= ~EXT4_FRO_COM_EXTRA_ISIZE;
 733         info->feat_ro_compat &= ~EXT4_FRO_COM_HUGE_FILE;
 734
 735         if (info->journal)
 736                 info->feat_compat |= EXT4_FCOM_HAS_JOURNAL;
 737
 738         if (info->dsc_size == 0) {
 739
 740                 if (info->feat_incompat & EXT4_FINCOM_64BIT)
 741                         info->dsc_size = EXT4_MAX_BLOCK_GROUP_DESCRIPTOR_SIZE;
 742                 else
 743                         info->dsc_size = EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE;
 744         }
 745
 746         info->bg_desc_reserve_blocks = 0;
 747
 748         ext4_dbg(DEBUG_MKFS, DBG_INFO "Creating filesystem with parameters:\n");
 749         ext4_dbg(DEBUG_MKFS, DBG_NONE "Size: %"PRIu64"\n", info->len);
 750         ext4_dbg(DEBUG_MKFS, DBG_NONE "Block size: %"PRIu32"\n",
 751                         info->block_size);
 752         ext4_dbg(DEBUG_MKFS, DBG_NONE "Blocks per group: %"PRIu32"\n",
 753                         info->blocks_per_group);
 754         ext4_dbg(DEBUG_MKFS, DBG_NONE "Inodes per group: %"PRIu32"\n",
 755                         info->inodes_per_group);
 756         ext4_dbg(DEBUG_MKFS, DBG_NONE "Inode size: %"PRIu32"\n",
 757                         info->inode_size);
 758         ext4_dbg(DEBUG_MKFS, DBG_NONE "Inodes: %"PRIu32"\n", info->inodes);
 759         ext4_dbg(DEBUG_MKFS, DBG_NONE "Journal blocks: %"PRIu32"\n",
 760                         info->journal_blocks);
 761         ext4_dbg(DEBUG_MKFS, DBG_NONE "Features ro_compat: 0x%x\n",
 762                         info->feat_ro_compat);
 763         ext4_dbg(DEBUG_MKFS, DBG_NONE "Features compat: 0x%x\n",
 764                         info->feat_compat);
 765         ext4_dbg(DEBUG_MKFS, DBG_NONE "Features incompat: 0x%x\n",
 766                         info->feat_incompat);
 767         ext4_dbg(DEBUG_MKFS, DBG_NONE "BG desc reserve: %"PRIu32"\n",
 768                         info->bg_desc_reserve_blocks);
 769         ext4_dbg(DEBUG_MKFS, DBG_NONE "Descriptor size: %"PRIu16"\n",
 770                         info->dsc_size);
 771         ext4_dbg(DEBUG_MKFS, DBG_NONE "journal: %s\n",
 772                         info->journal ? "yes" : "no");
 773         ext4_dbg(DEBUG_MKFS, DBG_NONE "Label: %s\n", info->label);
 774
 775         struct ext4_bcache bc;
 776
 777         memset(&bc, 0, sizeof(struct ext4_bcache));
 778         ext4_block_set_lb_size(bd, info->block_size);
 779
 780         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_bcache_init_dynamic");
 781
 782         r = ext4_bcache_init_dynamic(&bc, CONFIG_BLOCK_DEV_CACHE_SIZE,
 783                                       info->block_size);
 784         if (r != EOK)
 785                 goto block_fini;
 786
 787         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_block_bind_bcache");
 788
 789         /*Bind block cache to block device*/
 790         r = ext4_block_bind_bcache(bd, &bc);
 791         if (r != EOK)
 792                 goto cache_fini;
 793
 794         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_block_cache_write_back");
 795
 796         r = ext4_block_cache_write_back(bd, 1);
 797         if (r != EOK)
 798                 goto cache_fini;
 799
 800         fs->bdev = bd;
 801         fs->read_only = false;
 802
 803         ext4_dbg(DEBUG_MKFS, DBG_NONE "mkfs_init");
 804
 805         r = mkfs_init(fs, bd, info, progress, progress_context);
 806         if (r != EOK)
 807                 goto cache_fini;
 808
 809         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_fs_init");
 810
 811         r = ext4_fs_init(fs, bd, false);
 812         if (r != EOK)
 813                 goto cache_fini;
 814
 815         ext4_dbg(DEBUG_MKFS, DBG_NONE "alloc_inodes");
 816
 817         r = alloc_inodes(fs);
 818         if (r != EOK)
 819                 goto fs_fini;
 820
 821         ext4_dbg(DEBUG_MKFS, DBG_NONE "create_dirs");
 822
 823         r = create_dirs(fs);
 824         if (r != EOK)
 825                 goto fs_fini;
 826
 827         ext4_dbg(DEBUG_MKFS, DBG_NONE "create_journal_inode");
 828
 829         r = create_journal_inode(fs, info);
 830         if (r != EOK)
 831                 goto fs_fini;
 832
 833         fs_fini:
 834         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_fs_fini");
 835         ext4_fs_fini(fs);
 836
 837         cache_fini:
 838         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_block_cache_write_back");
 839         ext4_block_cache_write_back(bd, 0);
 840
 841         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_bcache_fini_dynamic");
 842         ext4_bcache_fini_dynamic(&bc);
 843
 844         block_fini:
 845         ext4_dbg(DEBUG_MKFS, DBG_NONE "ext4_block_fini");
 846         ext4_block_fini(bd);
 847
 848         return r;
 849 }
 850
 851 /**
 852  * @}
 853  */