static int fat_node_sync(fat_node_t *node)
{
block_t *b;
fat_bs_t *bs;
fat_dentry_t *d;
int rc;
assert(node->dirty);
bs = block_bb_get(node->idx->service_id);
/* Read the block that contains the dentry of interest. */
rc = _fat_block_get(&b, bs, node->idx->service_id, node->idx->pfc,
NULL, (node->idx->pdi * sizeof(fat_dentry_t)) / BPS(bs),
BLOCK_FLAGS_NONE);
if (rc != EOK)
return rc;
d = ((fat_dentry_t *)b->data) + (node->idx->pdi % DPS(bs));
d->firstc = host2uint16_t_le(node->firstc);
if (node->type == FAT_FILE) {
d->size = host2uint32_t_le(node->size);
} else if (node->type == FAT_DIRECTORY) {
d->attr = FAT_ATTR_SUBDIR;
}
/* TODO: update other fields? (e.g time fields) */
b->dirty = true; /* need to sync block */
rc = block_put(b);
return rc;
}
/** Construct boot sector with the given parameters. */
static void fat_bootsec_create(struct fat_cfg const *cfg, struct fat_bs *bs)
{
memset(bs, 0, sizeof(*bs));
bs->ji[0] = 0xEB;
bs->ji[1] = 0x3C;
bs->ji[2] = 0x90;
memcpy(bs->oem_name, "HELENOS ", 8);
/* BIOS Parameter Block */
bs->bps = host2uint16_t_le(cfg->sector_size);
bs->spc = cfg->sectors_per_cluster;
bs->rscnt = host2uint16_t_le(cfg->reserved_sectors);
bs->fatcnt = cfg->fat_count;
bs->root_ent_max = host2uint16_t_le(cfg->root_ent_max);
if (cfg->total_sectors < 0x10000) {
bs->totsec16 = host2uint16_t_le(cfg->total_sectors);
bs->totsec32 = 0;
} else {
bs->totsec16 = 0;
bs->totsec32 = host2uint32_t_le(cfg->total_sectors);
}
bs->mdesc = default_media_descriptor;
bs->sec_per_track = host2uint16_t_le(63);
bs->signature = host2uint16_t_be(0x55AA);
bs->headcnt = host2uint16_t_le(6);
bs->hidden_sec = host2uint32_t_le(0);
if (cfg->fat_type == FAT32) {
bs->sec_per_fat = 0;
bs->fat32.sectors_per_fat = host2uint32_t_le(cfg->fat_sectors);
bs->fat32.pdn = 0x80;
bs->fat32.ebs = 0x29;
bs->fat32.id = host2uint32_t_be(0x12345678);
bs->fat32.root_cluster = 2;
memcpy(bs->fat32.label, "HELENOS_NEW", 11);
memcpy(bs->fat32.type, "FAT32 ", 8);
} else {
bs->sec_per_fat = host2uint16_t_le(cfg->fat_sectors);
bs->pdn = 0x80;
bs->ebs = 0x29;
bs->id = host2uint32_t_be(0x12345678);
memcpy(bs->label, "HELENOS_NEW", 11);
memcpy(bs->type, "FAT ", 8);
}
}
/** Set directory entry length.
*
* @param de Directory entry
* @param length Entry length
*
*/
void ext4_directory_entry_ll_set_entry_length(ext4_directory_entry_ll_t *de,
uint16_t length)
{
de->entry_length = host2uint16_t_le(length);
}
void hda_reg16_write(uint16_t *r, uint16_t val)
{
pio_write_16(r, host2uint16_t_le(val));
}