Re: [Qemu-devel] [PATCH v4] Add HMP command "info memory-devices"

[Luiz Capitulino <lcapitulino@redhat.com>]

On Mon, 22 Sep 2014 11:29:00 +0200
Markus Armbruster <armbru@redhat.com> wrote:

> Igor Mammedov <imammedo@redhat.com> writes:
> 
> > On Mon, 22 Sep 2014 09:59:06 +0200
> > Markus Armbruster <armbru@redhat.com> wrote:
> >
> >> zhugh <zhugh.fnst@cn.fujitsu.com> writes:
> >> 
> >> > On Fri, 2014-09-19 at 11:34 -0400, Luiz Capitulino wrote:
> >> >> On Fri, 19 Sep 2014 15:30:19 +0200
> >> >> Igor Mammedov <imammedo@redhat.com> wrote:
> >> >> 
> >> >> > On Thu, 18 Sep 2014 16:09:32 +0800
> >> >> > zhugh <zhugh.fnst@cn.fujitsu.com> wrote:
> >> >> > 
> >> >> > > Hi,
> >> >> > > 
> >> >> > > Could anyone help to review this patch?
> >> >> > > If there was no problem, could help to merge it?
> >> >> > > 
> >> >> > > thanks!
> >> >> > > zhu
> >> >> > > 
> >> >> > > On Mon, 2014-09-15 at 19:31 +0800, Zhu Guihua wrote:
> >> >> > > > Provides HMP equivalent of QMP query-memory-devices command.
> >> >> > > > 
> >> >> > > > Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>
> >> [...]
> >> >> > > > diff --git a/hmp.c b/hmp.c
> >> >> > > > index 40a90da..feefeb4 100644
> >> >> > > > --- a/hmp.c
> >> >> > > > +++ b/hmp.c
> >> >> > > > @@ -1718,3 +1718,41 @@ void hmp_info_memdev(Monitor *mon, const QDict *qdict)
> >> >> > > >  
> >> >> > > >      qapi_free_MemdevList(memdev_list);
> >> >> > > >  }
> >> >> > > > +
> >> >> > > > +void hmp_info_memory_devices(Monitor *mon, const QDict *qdict)
> >> >> > > > +{
> >> >> > > > +    Error *err = NULL;
> >> >> > > > +    MemoryDeviceInfoList *info_list = qmp_query_memory_devices(&err);
> >> >> > > > +    MemoryDeviceInfoList *info;
> >> >> > > > +    MemoryDeviceInfo *value;
> >> >> > > > +    PCDIMMDeviceInfo *di;
> >> >> > > > +
> >> >> > > > +    for (info = info_list; info; info = info->next) {
> >> >> > > > +        value = info->value;
> >> >> > > > +
> >> >> > > > +        if (value) {
> >> >> > > > +            switch (value->kind) {
> >> >> > > > +            case MEMORY_DEVICE_INFO_KIND_DIMM:
> >> >> > > > +                di = value->dimm;
> >> >> > > > +
> >> >> > > > +                monitor_printf(mon, "Memory device [%s]: %s\n",
> >> >> > > > +                               MemoryDeviceInfoKind_lookup[value->kind],
> >> >> > > > +                               di->id);
> >> >> > 'id' might be null, here is what user will see:
> >> >> > 
> >> >> > Memory device [dimm]: (null)
> >> >> > 
> >> >> > I'd suggest to replace (null) with "" as it is done elsewhere.
> >> >> 
> >> >> Is the fix below what you're looking for? If it is I can apply it myself:
> >> >
> >> > I am sorry, I did not test this fix in my code last time. But your fix
> >> > would print nothing when the id was null.
> >> 
> >> Printing nothing when there's no ID has a certain logic to it :)
> >
> > When I do 'info qtree' it displays empty IDs with as empty ""
> > I think we should be consistent and apply above correction.
> 
> If you want consistency with "info qtree", you should enclose non-null
> ID in double quotes.

zhugh, at this point is better to respin the patch.