Re: [Xen-devel] [PATCH 28/29] libxl: ao: datacopier callback gets an rc

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Tue, 2015-02-10 at 20:10 +0000, Ian Jackson wrote:
> libxl__datacopier_* now provides its caller's callback function with
> an rc value.  This relieves the caller of the need to figure out an
> appropriate rc value.
> 
> Arrange that the `other internal failure' cases now get a valid
> positive errno value (EIO).
> 
> In a few places, assert that errno is nonzero before passing it to our
> caller.
> 
> Extend the datacopier callback API to permit the dc to signal
> CANCELLED.  (It doesn't actually do this yet, though.)
> 
> Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>

Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

Might be worth CC-ing the Migration-v2 folks on a 3rd version of this if
one happens.



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