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

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

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" ?

~Andrew

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