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void
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void
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fat_mark_cluster(dev_handle_t dev_handle, unsigned fatno, fat_cluster_t clst,
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fat_mark_cluster(dev_handle_t dev_handle, unsigned fatno, fat_cluster_t clst,
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    fat_cluster_t value)
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    fat_cluster_t value)
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{
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{
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    block_t *bb, *blk;
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    uint16_t bps;
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    uint16_t rscnt;
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    /* TODO */
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    uint16_t sf;
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    uint8_t fatcnt;
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    fat_cluster_t *cp;
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    bb = block_get(dev_handle, BS_BLOCK, BS_SIZE);
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    bps = uint16_t_le2host(FAT_BS(bb)->bps);
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    rscnt = uint16_t_le2host(FAT_BS(bb)->rscnt);
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    sf = uint16_t_le2host(FAT_BS(bb)->sec_per_fat);
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    fatcnt = FAT_BS(bb)->fatcnt;
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    block_put(bb);
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    assert(fatno < fatcnt);
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    blk = block_get(dev_handle, rscnt + sf * fatno +
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        (clst * sizeof(fat_cluster_t)) / bps, bps);
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    cp = (fat_cluster_t *)blk->data + clst % (bps / sizeof(fat_cluster_t));
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    *cp = host2uint16_t_le(value);
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    blk->dirty = true;      /* need to sync block */
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    block_put(blk);
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}
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}
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void fat_alloc_shadow_clusters(dev_handle_t dev_handle, fat_cluster_t *lifo,
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void fat_alloc_shadow_clusters(dev_handle_t dev_handle, fat_cluster_t *lifo,
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    unsigned nclsts)
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    unsigned nclsts)
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{
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{