ref: 9ae6dcb7e063d495267e7a53ddecb4d8356645ba
dir: /src/ext4_mkfs.c/
/*
* Copyright (c) 2015 Grzegorz Kostka (kostka.grzegorz@gmail.com)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup lwext4
* @{
*/
/**
* @file ext4_mkfs.c
* @brief
*/
#include "ext4_config.h"
#include "ext4_types.h"
#include "ext4_misc.h"
#include "ext4_errno.h"
#include "ext4_debug.h"
#include "ext4_super.h"
#include "ext4_block_group.h"
#include "ext4_dir.h"
#include "ext4_dir_idx.h"
#include "ext4_fs.h"
#include "ext4_inode.h"
#include "ext4_ialloc.h"
#include "ext4_mkfs.h"
#include <inttypes.h>
#include <string.h>
#include <stdlib.h>
struct fs_aux_info {
struct ext4_sblock *sb;
uint8_t *bg_desc_blk;
struct xattr_list_element *xattrs;
uint32_t first_data_block;
uint64_t len_blocks;
uint32_t inode_table_blocks;
uint32_t groups;
uint32_t bg_desc_blocks;
uint32_t default_i_flags;
uint32_t blocks_per_ind;
uint32_t blocks_per_dind;
uint32_t blocks_per_tind;
};
static inline int log_2(int j)
{
int i;
for (i = 0; j > 0; i++)
j >>= 1;
return i - 1;
}
static int sb2info(struct ext4_sblock *sb, struct ext4_mkfs_info *info)
{
if (to_le16(sb->magic) != EXT4_SUPERBLOCK_MAGIC)
return EINVAL;
info->block_size = 1024 << to_le32(sb->log_block_size);
info->blocks_per_group = to_le32(sb->blocks_per_group);
info->inodes_per_group = to_le32(sb->inodes_per_group);
info->inode_size = to_le16(sb->inode_size);
info->inodes = to_le32(sb->inodes_count);
info->feat_ro_compat = to_le32(sb->features_read_only);
info->feat_compat = to_le32(sb->features_compatible);
info->feat_incompat = to_le32(sb->features_incompatible);
info->bg_desc_reserve_blocks = to_le16(sb->s_reserved_gdt_blocks);
info->label = sb->volume_name;
info->len = (uint64_t)info->block_size * ext4_sb_get_blocks_cnt(sb);
info->dsc_size = to_le16(sb->desc_size);
return EOK;
}
static uint32_t compute_blocks_per_group(struct ext4_mkfs_info *info)
{
return info->block_size * 8;
}
static uint32_t compute_inodes(struct ext4_mkfs_info *info)
{
return (uint32_t)EXT4_DIV_ROUND_UP(info->len, info->block_size) / 4;
}
static uint32_t compute_inodes_per_group(struct ext4_mkfs_info *info)
{
uint32_t blocks = (uint32_t)EXT4_DIV_ROUND_UP(info->len, info->block_size);
uint32_t block_groups = EXT4_DIV_ROUND_UP(blocks, info->blocks_per_group);
uint32_t inodes = EXT4_DIV_ROUND_UP(info->inodes, block_groups);
inodes = EXT4_ALIGN(inodes, (info->block_size / info->inode_size));
/* After properly rounding up the number of inodes/group,
* make sure to update the total inodes field in the info struct.
*/
info->inodes = inodes * block_groups;
return inodes;
}
static uint32_t compute_journal_blocks(struct ext4_mkfs_info *info)
{
uint32_t journal_blocks = (uint32_t)EXT4_DIV_ROUND_UP(info->len,
info->block_size) / 64;
if (journal_blocks < 1024)
journal_blocks = 1024;
if (journal_blocks > 32768)
journal_blocks = 32768;
return journal_blocks;
}
static bool has_superblock(struct ext4_mkfs_info *info, uint32_t bgid)
{
if (!(info->feat_ro_compat & EXT4_FRO_COM_SPARSE_SUPER))
return true;
return ext4_sb_sparse(bgid);
}
static int create_fs_aux_info(struct fs_aux_info *aux_info,
struct ext4_mkfs_info *info)
{
aux_info->first_data_block = (info->block_size > 1024) ? 0 : 1;
aux_info->len_blocks = info->len / info->block_size;
aux_info->inode_table_blocks = EXT4_DIV_ROUND_UP(info->inodes_per_group *
info->inode_size, info->block_size);
aux_info->groups = (uint32_t)EXT4_DIV_ROUND_UP(aux_info->len_blocks -
aux_info->first_data_block, info->blocks_per_group);
aux_info->blocks_per_ind = info->block_size / sizeof(uint32_t);
aux_info->blocks_per_dind =
aux_info->blocks_per_ind * aux_info->blocks_per_ind;
aux_info->blocks_per_tind =
aux_info->blocks_per_dind * aux_info->blocks_per_dind;
aux_info->bg_desc_blocks =
EXT4_DIV_ROUND_UP(aux_info->groups * info->dsc_size,
info->block_size);
aux_info->default_i_flags = EXT4_INODE_FLAG_NOATIME;
uint32_t last_group_size = aux_info->len_blocks % info->blocks_per_group;
uint32_t last_header_size = 2 + aux_info->inode_table_blocks;
if (has_superblock(info, aux_info->groups - 1))
last_header_size += 1 + aux_info->bg_desc_blocks +
info->bg_desc_reserve_blocks;
if (last_group_size > 0 && last_group_size < last_header_size) {
aux_info->groups--;
aux_info->len_blocks -= last_group_size;
}
aux_info->sb = ext4_calloc(1, EXT4_SUPERBLOCK_SIZE);
if (!aux_info->sb)
return ENOMEM;
aux_info->bg_desc_blk = ext4_calloc(1, info->block_size);
if (!aux_info->bg_desc_blk)
return ENOMEM;
aux_info->xattrs = NULL;
ext4_dbg(DEBUG_MKFS, DBG_INFO "create_fs_aux_info\n");
ext4_dbg(DEBUG_MKFS, DBG_NONE "first_data_block: %"PRIu32"\n",
aux_info->first_data_block);
ext4_dbg(DEBUG_MKFS, DBG_NONE "len_blocks: %"PRIu64"\n",
aux_info->len_blocks);
ext4_dbg(DEBUG_MKFS, DBG_NONE "inode_table_blocks: %"PRIu32"\n",
aux_info->inode_table_blocks);
ext4_dbg(DEBUG_MKFS, DBG_NONE "groups: %"PRIu32"\n",
aux_info->groups);
ext4_dbg(DEBUG_MKFS, DBG_NONE "bg_desc_blocks: %"PRIu32"\n",
aux_info->bg_desc_blocks);
ext4_dbg(DEBUG_MKFS, DBG_NONE "default_i_flags: %"PRIu32"\n",
aux_info->default_i_flags);
ext4_dbg(DEBUG_MKFS, DBG_NONE "blocks_per_ind: %"PRIu32"\n",
aux_info->blocks_per_ind);
ext4_dbg(DEBUG_MKFS, DBG_NONE "blocks_per_dind: %"PRIu32"\n",
aux_info->blocks_per_dind);
ext4_dbg(DEBUG_MKFS, DBG_NONE "blocks_per_tind: %"PRIu32"\n",
aux_info->blocks_per_tind);
return EOK;
}
static void release_fs_aux_info(struct fs_aux_info *aux_info)
{
if (aux_info->sb)
ext4_free(aux_info->sb);
if (aux_info->bg_desc_blk)
ext4_free(aux_info->bg_desc_blk);
}
/* Fill in the superblock memory buffer based on the filesystem parameters */
static void fill_sb(struct fs_aux_info *aux_info, struct ext4_mkfs_info *info)
{
struct ext4_sblock *sb = aux_info->sb;
sb->inodes_count = to_le32(info->inodes_per_group * aux_info->groups);
ext4_sb_set_blocks_cnt(sb, aux_info->len_blocks);
ext4_sb_set_free_blocks_cnt(sb, aux_info->len_blocks);
sb->free_inodes_count = to_le32(info->inodes_per_group * aux_info->groups);
sb->reserved_blocks_count_lo = to_le32(0);
sb->first_data_block = to_le32(aux_info->first_data_block);
sb->log_block_size = to_le32(log_2(info->block_size / 1024));
sb->log_cluster_size = to_le32(log_2(info->block_size / 1024));
sb->blocks_per_group = to_le32(info->blocks_per_group);
sb->frags_per_group = to_le32(info->blocks_per_group);
sb->inodes_per_group = to_le32(info->inodes_per_group);
sb->mount_time = to_le32(0);
sb->write_time = to_le32(0);
sb->mount_count = to_le16(0);
sb->max_mount_count = to_le16(0xFFFF);
sb->magic = to_le16(EXT4_SUPERBLOCK_MAGIC);
sb->state = to_le16(EXT4_SUPERBLOCK_STATE_VALID_FS);
sb->errors = to_le16(EXT4_SUPERBLOCK_ERRORS_RO);
sb->minor_rev_level = to_le16(0);
sb->last_check_time = to_le32(0);
sb->check_interval = to_le32(0);
sb->creator_os = to_le32(EXT4_SUPERBLOCK_OS_LINUX);
sb->rev_level = to_le32(1);
sb->def_resuid = to_le16(0);
sb->def_resgid = to_le16(0);
sb->first_inode = to_le32(EXT4_GOOD_OLD_FIRST_INO);
sb->inode_size = to_le16(info->inode_size);
sb->block_group_index = to_le16(0);
sb->features_compatible = to_le32(info->feat_compat);
sb->features_incompatible = to_le32(info->feat_incompat);
sb->features_read_only = to_le32(info->feat_ro_compat);
memset(sb->uuid, 0, sizeof(sb->uuid));
memset(sb->volume_name, 0, sizeof(sb->volume_name));
strncpy(sb->volume_name, info->label, sizeof(sb->volume_name));
memset(sb->last_mounted, 0, sizeof(sb->last_mounted));
sb->algorithm_usage_bitmap = to_le32(0);
sb->s_prealloc_blocks = 0;
sb->s_prealloc_dir_blocks = 0;
sb->s_reserved_gdt_blocks = to_le16(info->bg_desc_reserve_blocks);
if (info->feat_compat & EXT4_FCOM_HAS_JOURNAL)
sb->journal_inode_number = to_le32(EXT4_JOURNAL_INO);
sb->journal_backup_type = 1;
sb->journal_dev = to_le32(0);
sb->last_orphan = to_le32(0);
sb->hash_seed[0] = to_le32(0x11111111);
sb->hash_seed[1] = to_le32(0x22222222);
sb->hash_seed[2] = to_le32(0x33333333);
sb->hash_seed[3] = to_le32(0x44444444);
sb->default_hash_version = EXT2_HTREE_HALF_MD4;
sb->checksum_type = 1;
sb->desc_size = to_le16(info->dsc_size);
sb->default_mount_opts = to_le32(0);
sb->first_meta_bg = to_le32(0);
sb->mkfs_time = to_le32(0);
sb->reserved_blocks_count_hi = to_le32(0);
sb->min_extra_isize = to_le32(sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE);
sb->want_extra_isize = to_le32(sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE);
sb->flags = to_le32(EXT4_SUPERBLOCK_FLAGS_SIGNED_HASH);
}
static int write_bgroup_block(struct ext4_blockdev *bd,
struct fs_aux_info *aux_info,
struct ext4_mkfs_info *info,
uint32_t blk)
{
int r = EOK;
uint32_t j;
struct ext4_block b;
uint32_t block_size = ext4_sb_get_block_size(aux_info->sb);
for (j = 0; j < aux_info->groups; j++) {
uint64_t bg_start_block = aux_info->first_data_block +
j * info->blocks_per_group;
uint32_t blk_off = 0;
blk_off += aux_info->bg_desc_blocks;
if (has_superblock(info, j)) {
bg_start_block++;
blk_off += info->bg_desc_reserve_blocks;
}
uint64_t dsc_blk = bg_start_block + blk;
r = ext4_block_get_noread(bd, &b, dsc_blk);
if (r != EOK)
return r;
memcpy(b.data, aux_info->bg_desc_blk, block_size);
ext4_bcache_set_dirty(b.buf);
r = ext4_block_set(bd, &b);
if (r != EOK)
return r;
}
return r;
}
static int write_bgroups(struct ext4_blockdev *bd, struct fs_aux_info *aux_info,
struct ext4_mkfs_info *info)
{
int r = EOK;
struct ext4_block b;
struct ext4_bgroup *bg_desc;
uint32_t i;
uint32_t bg_free_blk = 0;
uint64_t sb_free_blk = 0;
uint32_t block_size = ext4_sb_get_block_size(aux_info->sb);
uint32_t dsc_size = ext4_sb_get_desc_size(aux_info->sb);
uint32_t dsc_per_block = block_size / dsc_size;
uint32_t k = 0;
for (i = 0; i < aux_info->groups; i++) {
uint64_t bg_start_block = aux_info->first_data_block +
aux_info->first_data_block + i * info->blocks_per_group;
uint32_t blk_off = 0;
bg_desc = (void *)(aux_info->bg_desc_blk + k * dsc_size);
bg_free_blk = info->blocks_per_group -
aux_info->inode_table_blocks;
bg_free_blk -= 2;
blk_off += aux_info->bg_desc_blocks;
if (i == (aux_info->groups - 1))
bg_free_blk -= aux_info->first_data_block;
if (has_superblock(info, i)) {
bg_start_block++;
blk_off += info->bg_desc_reserve_blocks;
bg_free_blk -= info->bg_desc_reserve_blocks + 1;
bg_free_blk -= aux_info->bg_desc_blocks;
}
ext4_bg_set_block_bitmap(bg_desc, aux_info->sb,
bg_start_block + blk_off + 1);
ext4_bg_set_inode_bitmap(bg_desc, aux_info->sb,
bg_start_block + blk_off + 2);
ext4_bg_set_inode_table_first_block(bg_desc,
aux_info->sb,
bg_start_block + blk_off + 3);
ext4_bg_set_free_blocks_count(bg_desc, aux_info->sb,
bg_free_blk);
ext4_bg_set_free_inodes_count(bg_desc,
aux_info->sb, to_le32(aux_info->sb->inodes_per_group));
ext4_bg_set_used_dirs_count(bg_desc, aux_info->sb, 0);
ext4_bg_set_flag(bg_desc,
EXT4_BLOCK_GROUP_BLOCK_UNINIT |
EXT4_BLOCK_GROUP_INODE_UNINIT);
sb_free_blk += bg_free_blk;
r = ext4_block_get_noread(bd, &b, bg_start_block + blk_off + 1);
if (r != EOK)
return r;
memset(b.data, 0, block_size);
ext4_bcache_set_dirty(b.buf);
r = ext4_block_set(bd, &b);
if (r != EOK)
return r;
r = ext4_block_get_noread(bd, &b, bg_start_block + blk_off + 2);
if (r != EOK)
return r;
memset(b.data, 0, block_size);
ext4_bcache_set_dirty(b.buf);
r = ext4_block_set(bd, &b);
if (r != EOK)
return r;
if (++k != dsc_per_block)
continue;
k = 0;
r = write_bgroup_block(bd, aux_info, info, i / dsc_per_block);
if (r != EOK)
return r;
}
r = write_bgroup_block(bd, aux_info, info, i / dsc_per_block);
if (r != EOK)
return r;
ext4_sb_set_free_blocks_cnt(aux_info->sb, sb_free_blk);
return r;
}
static int write_sblocks(struct ext4_blockdev *bd, struct fs_aux_info *aux_info,
struct ext4_mkfs_info *info)
{
uint64_t offset;
uint32_t i;
int r;
/* write out the backup superblocks */
for (i = 1; i < aux_info->groups; i++) {
if (has_superblock(info, i)) {
offset = info->block_size * (aux_info->first_data_block
+ i * info->blocks_per_group);
aux_info->sb->block_group_index = to_le16(i);
r = ext4_block_writebytes(bd, offset, aux_info->sb,
EXT4_SUPERBLOCK_SIZE);
if (r != EOK)
return r;
}
}
/* write out the primary superblock */
aux_info->sb->block_group_index = to_le16(0);
return ext4_block_writebytes(bd, 1024, aux_info->sb,
EXT4_SUPERBLOCK_SIZE);
}
int ext4_mkfs_read_info(struct ext4_blockdev *bd, struct ext4_mkfs_info *info)
{
int r;
struct ext4_sblock *sb = NULL;
r = ext4_block_init(bd);
if (r != EOK)
return r;
sb = ext4_malloc(EXT4_SUPERBLOCK_SIZE);
if (!sb)
goto Finish;
r = ext4_sb_read(bd, sb);
if (r != EOK)
goto Finish;
r = sb2info(sb, info);
Finish:
if (sb)
ext4_free(sb);
ext4_block_fini(bd);
return r;
}
static int mkfs_init(struct ext4_blockdev *bd, struct ext4_mkfs_info *info)
{
int r;
struct fs_aux_info aux_info;
memset(&aux_info, 0, sizeof(struct fs_aux_info));
r = create_fs_aux_info(&aux_info, info);
if (r != EOK)
goto Finish;
fill_sb(&aux_info, info);
r = write_bgroups(bd, &aux_info, info);
if (r != EOK)
goto Finish;
r = write_sblocks(bd, &aux_info, info);
if (r != EOK)
goto Finish;
Finish:
release_fs_aux_info(&aux_info);
return r;
}
static int init_bgs(struct ext4_fs *fs)
{
int r = EOK;
struct ext4_block_group_ref ref;
uint32_t i;
uint32_t bg_count = ext4_block_group_cnt(&fs->sb);
for (i = 0; i < bg_count; ++i) {
r = ext4_fs_get_block_group_ref(fs, i, &ref);
if (r != EOK)
break;
r = ext4_fs_put_block_group_ref(&ref);
if (r != EOK)
break;
}
return r;
}
static int alloc_inodes(struct ext4_fs *fs)
{
int r = EOK;
int i;
struct ext4_inode_ref inode_ref;
for (i = 1; i < 12; ++i) {
int filetype = EXT4_DE_REG_FILE;
switch (i) {
case EXT4_ROOT_INO:
case EXT4_GOOD_OLD_FIRST_INO:
filetype = EXT4_DE_DIR;
break;
default:
break;
}
r = ext4_fs_alloc_inode(fs, &inode_ref, filetype);
if (r != EOK)
return r;
ext4_inode_set_mode(&fs->sb, inode_ref.inode, 0);
switch (i) {
case EXT4_ROOT_INO:
case EXT4_JOURNAL_INO:
ext4_fs_inode_blocks_init(fs, &inode_ref);
break;
}
ext4_fs_put_inode_ref(&inode_ref);
}
return r;
}
static int create_dirs(struct ext4_fs *fs)
{
int r = EOK;
struct ext4_inode_ref root;
struct ext4_inode_ref child;
r = ext4_fs_get_inode_ref(fs, EXT4_ROOT_INO, &root);
if (r != EOK)
return r;
r = ext4_fs_get_inode_ref(fs, EXT4_GOOD_OLD_FIRST_INO, &child);
if (r != EOK)
return r;
ext4_inode_set_mode(&fs->sb, child.inode,
EXT4_INODE_MODE_DIRECTORY | 0777);
ext4_inode_set_mode(&fs->sb, root.inode,
EXT4_INODE_MODE_DIRECTORY | 0777);
#if CONFIG_DIR_INDEX_ENABLE
/* Initialize directory index if supported */
if (ext4_sb_feature_com(&fs->sb, EXT4_FCOM_DIR_INDEX)) {
r = ext4_dir_dx_init(&root, &root);
if (r != EOK)
return r;
r = ext4_dir_dx_init(&child, &root);
if (r != EOK)
return r;
ext4_inode_set_flag(root.inode, EXT4_INODE_FLAG_INDEX);
ext4_inode_set_flag(child.inode, EXT4_INODE_FLAG_INDEX);
} else
#endif
{
r = ext4_dir_add_entry(&root, ".", strlen("."), &root);
if (r != EOK)
return r;
r = ext4_dir_add_entry(&root, "..", strlen(".."), &root);
if (r != EOK)
return r;
r = ext4_dir_add_entry(&child, ".", strlen("."), &child);
if (r != EOK)
return r;
r = ext4_dir_add_entry(&child, "..", strlen(".."), &root);
if (r != EOK)
return r;
}
r = ext4_dir_add_entry(&root, "lost+found", strlen("lost+found"), &child);
if (r != EOK)
return r;
ext4_inode_set_links_cnt(root.inode, 3);
ext4_inode_set_links_cnt(child.inode, 2);
child.dirty = true;
root.dirty = true;
ext4_fs_put_inode_ref(&child);
ext4_fs_put_inode_ref(&root);
return r;
}
static int create_journal_inode(struct ext4_fs *fs,
struct ext4_mkfs_info *info)
{
int ret;
struct ext4_inode_ref inode_ref;
uint64_t blocks_count;
if (!info->journal)
return EOK;
ret = ext4_fs_get_inode_ref(fs, EXT4_JOURNAL_INO, &inode_ref);
if (ret != EOK)
return ret;
struct ext4_inode *inode = inode_ref.inode;
ext4_inode_set_mode(&fs->sb, inode, EXT4_INODE_MODE_FILE | 0600);
ext4_inode_set_links_cnt(inode, 1);
blocks_count = ext4_inode_get_blocks_count(&fs->sb, inode);
while (blocks_count++ < info->journal_blocks)
{
ext4_fsblk_t fblock;
ext4_lblk_t iblock;
struct ext4_block blk;
ret = ext4_fs_append_inode_dblk(&inode_ref, &fblock, &iblock);
if (ret != EOK)
goto Finish;
if (iblock != 0)
continue;
ret = ext4_block_get(fs->bdev, &blk, fblock);
if (ret != EOK)
goto Finish;
struct jbd_sb * jbd_sb = (struct jbd_sb * )blk.data;
memset(jbd_sb, 0, sizeof(struct jbd_sb));
jbd_sb->header.magic = to_be32(JBD_MAGIC_NUMBER);
jbd_sb->header.blocktype = to_be32(JBD_SUPERBLOCK_V2);
jbd_sb->blocksize = to_be32(info->block_size);
jbd_sb->maxlen = to_be32(info->journal_blocks);
jbd_sb->nr_users = to_be32(1);
jbd_sb->first = to_be32(1);
jbd_sb->sequence = to_be32(1);
ext4_bcache_set_dirty(blk.buf);
ret = ext4_block_set(fs->bdev, &blk);
if (ret != EOK)
goto Finish;
}
memcpy(fs->sb.journal_blocks, inode->blocks, sizeof(inode->blocks));
Finish:
ext4_fs_put_inode_ref(&inode_ref);
return ret;
}
int ext4_mkfs(struct ext4_fs *fs, struct ext4_blockdev *bd,
struct ext4_mkfs_info *info, int fs_type)
{
int r;
r = ext4_block_init(bd);
if (r != EOK)
return r;
bd->fs = fs;
if (info->len == 0)
info->len = bd->bdif->ph_bcnt * bd->bdif->ph_bsize;
if (info->block_size == 0)
info->block_size = 4096; /*Set block size to default value*/
/* Round down the filesystem length to be a multiple of the block size */
info->len &= ~((uint64_t)info->block_size - 1);
if (info->journal_blocks == 0)
info->journal_blocks = compute_journal_blocks(info);
if (info->blocks_per_group == 0)
info->blocks_per_group = compute_blocks_per_group(info);
if (info->inodes == 0)
info->inodes = compute_inodes(info);
if (info->inode_size == 0)
info->inode_size = 256;
if (info->label == NULL)
info->label = "";
info->inodes_per_group = compute_inodes_per_group(info);
switch (fs_type) {
case F_SET_EXT2:
info->feat_compat = EXT2_SUPPORTED_FCOM;
info->feat_ro_compat = EXT2_SUPPORTED_FRO_COM;
info->feat_incompat = EXT2_SUPPORTED_FINCOM;
break;
case F_SET_EXT3:
info->feat_compat = EXT3_SUPPORTED_FCOM;
info->feat_ro_compat = EXT3_SUPPORTED_FRO_COM;
info->feat_incompat = EXT3_SUPPORTED_FINCOM;
break;
case F_SET_EXT4:
info->feat_compat = EXT4_SUPPORTED_FCOM;
info->feat_ro_compat = EXT4_SUPPORTED_FRO_COM;
info->feat_incompat = EXT4_SUPPORTED_FINCOM;
break;
}
/*TODO: handle this features some day...*/
info->feat_incompat &= ~EXT4_FINCOM_META_BG;
info->feat_incompat &= ~EXT4_FINCOM_FLEX_BG;
info->feat_incompat &= ~EXT4_FINCOM_64BIT;
info->feat_ro_compat &= ~EXT4_FRO_COM_METADATA_CSUM;
info->feat_ro_compat &= ~EXT4_FRO_COM_GDT_CSUM;
info->feat_ro_compat &= ~EXT4_FRO_COM_DIR_NLINK;
info->feat_ro_compat &= ~EXT4_FRO_COM_EXTRA_ISIZE;
info->feat_ro_compat &= ~EXT4_FRO_COM_HUGE_FILE;
if (info->journal)
info->feat_compat |= EXT4_FCOM_HAS_JOURNAL;
if (info->dsc_size == 0) {
if (info->feat_incompat & EXT4_FINCOM_64BIT)
info->dsc_size = EXT4_MAX_BLOCK_GROUP_DESCRIPTOR_SIZE;
else
info->dsc_size = EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE;
}
info->bg_desc_reserve_blocks = 0;
ext4_dbg(DEBUG_MKFS, DBG_INFO "Creating filesystem with parameters:\n");
ext4_dbg(DEBUG_MKFS, DBG_NONE "Size: %"PRIu64"\n", info->len);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Block size: %"PRIu32"\n",
info->block_size);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Blocks per group: %"PRIu32"\n",
info->blocks_per_group);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Inodes per group: %"PRIu32"\n",
info->inodes_per_group);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Inode size: %"PRIu32"\n",
info->inode_size);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Inodes: %"PRIu32"\n", info->inodes);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Journal blocks: %"PRIu32"\n",
info->journal_blocks);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Features ro_compat: 0x%x\n",
info->feat_ro_compat);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Features compat: 0x%x\n",
info->feat_compat);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Features incompat: 0x%x\n",
info->feat_incompat);
ext4_dbg(DEBUG_MKFS, DBG_NONE "BG desc reserve: %"PRIu32"\n",
info->bg_desc_reserve_blocks);
ext4_dbg(DEBUG_MKFS, DBG_NONE "Descriptor size: %"PRIu16"\n",
info->dsc_size);
ext4_dbg(DEBUG_MKFS, DBG_NONE "journal: %s\n",
info->journal ? "yes" : "no");
ext4_dbg(DEBUG_MKFS, DBG_NONE "Label: %s\n", info->label);
struct ext4_bcache bc;
memset(&bc, 0, sizeof(struct ext4_bcache));
ext4_block_set_lb_size(bd, info->block_size);
r = ext4_bcache_init_dynamic(&bc, CONFIG_BLOCK_DEV_CACHE_SIZE,
info->block_size);
if (r != EOK)
goto block_fini;
/*Bind block cache to block device*/
r = ext4_block_bind_bcache(bd, &bc);
if (r != EOK)
goto cache_fini;
r = ext4_block_cache_write_back(bd, 1);
if (r != EOK)
goto cache_fini;
r = mkfs_init(bd, info);
if (r != EOK)
goto cache_fini;
r = ext4_fs_init(fs, bd, false);
if (r != EOK)
goto cache_fini;
r = init_bgs(fs);
if (r != EOK)
goto fs_fini;
r = alloc_inodes(fs);
if (r != EOK)
goto fs_fini;
r = create_dirs(fs);
if (r != EOK)
goto fs_fini;
r = create_journal_inode(fs, info);
if (r != EOK)
goto fs_fini;
fs_fini:
ext4_fs_fini(fs);
cache_fini:
ext4_block_cache_write_back(bd, 0);
ext4_bcache_fini_dynamic(&bc);
block_fini:
ext4_block_fini(bd);
return r;
}
/**
* @}
*/