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Rev 4553 Rev 4572
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    link_t hash_link;
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    link_t hash_link;
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    /** Buffer with the block data. */
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    /** Buffer with the block data. */
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    void *data;
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    void *data;
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} block_t;
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} block_t;
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/** Caching mode */
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enum cache_mode {
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    /** Write-Through */
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    CACHE_MODE_WT,
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    /** Write-Back */
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    CACHE_MODE_WB
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};
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extern int block_init(dev_handle_t, size_t);
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extern int block_init(dev_handle_t, size_t);
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extern void block_fini(dev_handle_t);
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extern void block_fini(dev_handle_t);
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extern int block_bb_read(dev_handle_t, off_t, size_t);
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extern int block_bb_read(dev_handle_t, off_t, size_t);
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extern void *block_bb_get(dev_handle_t);
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extern void *block_bb_get(dev_handle_t);
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extern int block_cache_init(dev_handle_t, size_t, unsigned);
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extern int block_cache_init(dev_handle_t, size_t, unsigned, enum cache_mode);
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extern block_t *block_get(dev_handle_t, bn_t, int flags);
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extern block_t *block_get(dev_handle_t, bn_t, int flags);
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extern void block_put(block_t *);
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extern void block_put(block_t *);
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extern int block_read(dev_handle_t, off_t *, size_t *, off_t *, void *, size_t,
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extern int block_read(dev_handle_t, off_t *, size_t *, off_t *, void *, size_t,