Re: [Xen-devel] extending blkif_request_t

[Xin Zhao <zhaoxin@xxxxxxxxxxxxxx>]

If you need to add a new field to blkif_request_t, you might have to be
very careful, because the size of blkif_request_t and the blkif_ring_t are
carefully calibrated. If you add a new field, make it sure that the size
of blkif_ring_t will not exceed PAGE_SIZE. You may also change
blkif_ring_t to hold more request. That may take some more work.

Good luck,
Xin

On Sat, 19 Mar 2005, Deepak Manohar wrote:

> Hi,
>
>  I am sorry if this was asked earlier, but I couldnt find it.
>
>  If I want to pass another field in the structure blkif_request_t do I
> simply add it to xen/include/public/io/blkif.h ?
>
>  After doing this will the backend and the frontend be able to access
> this field. Thanks.
>
> Deepak
>
>
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