The oskit_blkio interface supports reading and writing of raw data in units of fixed-sized blocks which are some power of two. This interface is identical to the oskit_absio interface except for the addition of a getblocksize method; in fact, an object that supports byte-granularity reads and writes can easily export both oskit_blkio and oskit_absio using exactly the same function pointer table, simply by implementing an oskit_blkio interface that always returns one from getblocksize, and then returning a pointer to that interface on queries for either oskit_blkio or oskit_absio.
The oskit_blkio interface inherits from IUnknown, and has the following additional methods: