On Mon, 2008-03-17 at 23:18 +0100, Lil Evil wrote:> Hi,
>
> I ve been trying to get some information out of xen for a while now.
> unfortunately, I failed so far.
> I want to do some virtual hard disk write analysis and therefor would need
xen to return me the LBA of the sector written.
> If been looking into the source code blkback/blkfront, but I have
difficulties identifying the write function.
> Could anybody kindly point me into the right direction?
blkif is rather well documented in xen/include/public/io/blkif.h
Did you find this this already?
It''s comparatively simple. A request message carries a number of
segments, each segment a range of sectors (up to 8 x 512 == 4096, i.e. a
page size, therefore the format).
The type of operation is either read or write, encoded in the request.
Daniel
--
Daniel Stodden
LRR - Lehrstuhl für Rechnertechnik und Rechnerorganisation
Institut für Informatik der TU München D-85748 Garching
http://www.lrr.in.tum.de/~stodden mailto:stodden@cs.tum.edu
PGP Fingerprint: F5A4 1575 4C56 E26A 0B33 3D80 457E 82AE B0D8 735B
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