Re: [Xen-devel] [PATCH v3 1/6] xl: Return proper error codes for block-attach and block-detach

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 16/12/15 16:53, George Dunlap wrote:
> On 08/12/15 17:15, Ian Campbell wrote:
>> On Tue, 2015-12-01 at 11:53 +0000, George Dunlap wrote:
>>> Return proper error codes on failure so that scripts can tell whether
>>> the command completed properly or not.
>>>
>>> Also while we're at it, normalize init and dispose of
>>> libxl_device_disk structures.  This means calling init and dispose in
>>> the actual functions where they are declared.
>>>
>>> This in turn means changing parse_disk_config_multistring() to not
>>> call libxl_device_disk_init.  And that in turn means changes to
>>> callers of parse_disk_config().
>>>
>>> It also means removing libxl_device_disk_init() from
>>> libxl.c:libxl_vdev_to_device_disk().  This is only called from
>>> xl_cmdimpl.c.
>>
>> ... and the ocaml bindings.
>>
>> I can't remember what we decided regarding libxl "getter" functions and
>> initialisation of the data type (i.e. whose responsibility it is), but it
>> seems that changing a given calls semantics is rather dangerous API-wise.
> 
> Right -- looks like there are similar issues with the nic lookup
> routines as well.  I'll drop that bit from the patch.

Hmm -- and upon further inspection, it appears that the headline feature
(returning appropriate error codes) was already checked in. What was
left was only the "while we're at it" bit. :-/

I'll drop this from the series...

 -George


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