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Re: [Xen-devel] [RFC PATCH] Data integrity extension support for xen-block

> * A filesystem in Guest that is integrity-aware can prepare I/Os with 
> metadata attached.
> * Filesystems in Guest are capable of transferring metadata from user space.
> Those metadata get lost if we don't pass them through in blkfront.
> You may have a look at:
> [1] http://lwn.net/Articles/280023/
> [2] https://www.kernel.org/doc/Documentation/block/data-integrity.txt

And Google for SCSI DIF/DIX which can give you some ideas. There is also
this slide-deck: https://oss.oracle.com/~mkp/docs/ols2008-slides.pdf

Also note that some devices (like NVMe) also implement some of this:

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