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;
}
int fat_directory_open(fat_node_t *nodep, fat_directory_t *di)
{
di->b = NULL;
di->nodep = nodep;
if (di->nodep->type != FAT_DIRECTORY)
return EINVAL;
di->bs = block_bb_get(di->nodep->idx->service_id);
di->blocks = ROUND_UP(nodep->size, BPS(di->bs)) / BPS(di->bs);
di->pos = 0;
di->bnum = 0;
di->last = false;
return EOK;
}
