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    node->dirty = false;
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    node->dirty = false;
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}
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}
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static void fat_node_sync(fat_node_t *node)
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static void fat_node_sync(fat_node_t *node)
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{
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{
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    /* TODO */
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    block_t *bb, *b;
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    fat_dentry_t *d;
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    uint16_t bps;
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    unsigned dps;
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    assert(node->dirty);
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    bb = block_get(node->idx->dev_handle, BS_BLOCK, BS_SIZE);
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    bps = uint16_t_le2host(FAT_BS(bb)->bps);
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    dps = bps / sizeof(fat_dentry_t);
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    /* Read the block that contains the dentry of interest. */
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    b = _fat_block_get(bb->data, node->idx->dev_handle, node->idx->pfc,
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        (node->idx->pdi * sizeof(fat_dentry_t)) / bps);
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    d = ((fat_dentry_t *)b->data) + (node->idx->pdi % dps);
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    d->firstc = host2uint16_t_le(node->firstc);
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    if (node->type == FAT_FILE)
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        d->size = host2uint32_t_le(node->size);
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    /* TODO: update other fields? (e.g time fields, attr field) */
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    b->dirty = true;        /* need to sync block */
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    block_put(b);
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    block_put(bb);
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}
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}
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/** Internal version of fat_node_get().
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/** Internal version of fat_node_get().
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 *
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 *
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 * @param idxp      Locked index structure.
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 * @param idxp      Locked index structure.