Re: [Xen-devel] [PATCH v2 4/6] tools/libxl: Allow limiting amount copied by datacopier

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Wed, 2015-03-11 at 12:23 +0000, Andrew Cooper wrote:
> On 11/03/15 12:15, Ian Campbell wrote:
> > On Fri, 2015-03-06 at 19:05 +0000, Andrew Cooper wrote:
> >> From: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>
> >>
> >> Currently, a datacopier will unconditionally read until EOF on its read fd.
> >>
> >> For migration v2, libxl needs to read records of a specific length out of 
> >> the
> >> migration stream, without reading any further data.
> >>
> >> Introduce a parameter, maxread, which may be used to stop the datacopier 
> >> ahead
> >> of reaching EOF.
> > maxread is ok as a parameter but not really in the dc.
> >
> > It's unfortunate that "toread" is already used. Perhaps "remaining" (or
> > remread if you want to get terse)?
> 
> ssize_t bytes_to_read perhaps? with -1 being a sentinel for "until EOF" ?

WFM.



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