[dm-devel] block mapping

["Kasatkin, Dmitry" <dmitry kasatkin intel com>]

Hello All,

I would like to implement such block device, which can store
additional information along with the block data.
For example. so if file system has 4k block, I would like to store
4k+256b of additional information...

Can such block device be implemented with device mapper?

Thank you,

Dmitry