Re: [Xen-devel] [PATCH v2 08/13] xenstore: modify init-xenstore-domain parameter syntax

[Juergen Gross <jgross@xxxxxxxx>]

On 07/01/16 11:23, Ian Campbell wrote:
> On Thu, 2016-01-07 at 07:34 +0100, Juergen Gross wrote:
>> On 06/01/16 17:21, Ian Campbell wrote:
>>> On Fri, 2015-12-18 at 14:14 +0100, Juergen Gross wrote:
>>>> init-xenstore-domain takes only positional parameters today. Change
>>>> this to a more flexible parameter syntax allowing to specify
>>>> additional
>>>> options or to omit some.
>>>>
>>>> Today the supported usage is:
>>>>
>>>> init-xenstore-domain <xenstore-kernel> <memory_mb> <flask-label>
>>>>                      [<ramdisk-file>]
>>>>
>>>> Modify this to:
>>>>
>>>> init-xenstore-domain --kernel <xenstore-kernel>
>>>>                      --memory <memory_mb>
>>>>                      [--flask <flask-label>]
>>>>                      [--ramdisk <ramdisk-file>]
>>>>
>>>> The flask label is made optional in order to support xenstore domains
>>>> without the need of a flask enabled hypervisor.
>>>>
>>>> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
>>>
>>> I think Daniel and I both acked this patch in v1 (as #5/9). Is this
>>> version
>>> different? If so please include an intra-version changelog after the "-
>>> --"
>>> to help us out.
>>
>> There was an error in parameter parsing (omitting kernel or memory
>> wasn't detected). It was mentioned in the changelog in the cover letter.
> 
> In general we prefer these sorts of details to be mentioned in the patch
> themselves, after a "---" marker such that they don't get included in the
> actual commit. The cover letter should be more of a summary.

Okay, I'll add a patch specific changelog in the future.

> 
>> I'll add a note next time when I drop an Ack.
> 
> Thanks.
> 
> WRT that change and:
> 
>> +    if (optind != argc || !kernel || !memory) {
>> +        usage();
>>          return 2;
>>      }
> 
> Under what circumstances can optind != argc? AFAICT it should never happen
> because the switch cover all valid options and returns otherwise. If it can
> never happen it should be an assert.
> 
> Oh, is it to catch things like "--foo bar baz" i.e. additional non-option
> arguments (of which there should be none)?

Exactly.

> 
> If that is the case: Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

Thanks,

Juergen


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