[dm-devel] API for multi-segment atomic IO

[Bart Van Assche]

On 07/07/2015 08:33 PM, Doug Dumitru wrote:
> ... is anyone working on such an animal.  I was thinking of a "struct
> bio" extension.  I know that Fusion had a private API for this, but I am
> not a Fusion customer so I have not seen their concepts.

The following document may be helpful: "SBC-4 SPC-5 Atomic writes and 
reads" (http://www.t10.org/cgi-bin/ac.pl?t=d&f=13-064r9.pdf). Please 
note that the information about atomic writes in that document has been 
superseded by the section in the SBC-4 document about atomic writes 
(http://www.t10.org/cgi-bin/ac.pl?t=f&f=sbc4r07c.pdf).

Bart.