Re: [Qemu-devel] [PATCH] Further tidy-up on block status

[Vladimir Sementsov-Ogievskiy]

11.01.2017 22:00, Alex Bligh wrote:
> > On 11 Jan 2017, at 15:31, Vladimir Sementsov-Ogievskiy <address@hidden> wrote:
> >
> > > > > If an error occurs, the server SHOULD set the appropriate error code in the 
> > > > > error field of an error chunk. However, if the error does not involve invalid 
> > > > > usage (such as a request beyond the bounds of the file), a server MAY reply 
> > > > > with a single block status descriptor with length matching the requested 
> > > > > length, and status of 0 rather than reporting the error.
> > - single block status descriptor for each context? Isn't it implementation 
> > defined? Or we finally decided to force 0 status to be safe default for all 
> > contexts? If it is so, it would be better to describe this separately. However, 
> > personally, I'd prefer to not define contexts internal semantics at all.
> I think this is Wouter's wording, but I think 'a status appropriate to the 
> context' would be better. Each context then needs to define what that is. 
> Either that or 'the context's default status' and that should be in the 
> definition of the context.

Yes this is better. But is it actually needed to force contexts have 
some safe default? If context wants it may define such default without 
this requirement.. So, should it be requirement at all?


--
Best regards,
Vladimir