pblk: Physical Block Device Target

pblk implements a fully associative, host-based FTL that exposes a traditional block I/O interface. Its primary responsibilities are:

  • Map logical addresses onto physical addresses (4KB granularity) in a logical-to-physical (L2P) table.

  • Maintain the integrity and consistency of the L2P table as well as its recovery from normal tear down and power outage.

  • Deal with controller- and media-specific constrains.

  • Handle I/O errors.

  • Implement garbage collection.

  • Maintain consistency across the I/O stack during synchronization points.

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