[libvirt] [PATCH] lxc: Refresh capabilities if they have never been initalized

[Daniel P. Berrangé]

On Mon, Dec 09, 2019 at 01:16:42PM -0500, Cole Robinson wrote:
> On 12/9/19 1:15 PM, Cole Robinson wrote:
> > Adjust virLXCDriverGetCapabilities to fill in driver->caps if it has
> > never been set, regardless of the passed 'refresh' boolean.
> > 
> > This fixes LXC XML startup parsing for me
> > 
> > Signed-off-by: Cole Robinson <crobinso at redhat.com>
> > ---
> >  src/lxc/lxc_conf.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> 
> I meant to add: not sure if it's safe to access driver->caps like this
> without holding the driver lock ...

No, you'll have to hold the lock - take a look at
virQEMUDriverGetCapabilities for the pattern we can
copy.

> 
> - Cole
> 
> > diff --git a/src/lxc/lxc_conf.c b/src/lxc/lxc_conf.c
> > index 2df1537b22..803176f52b 100644
> > --- a/src/lxc/lxc_conf.c
> > +++ b/src/lxc/lxc_conf.c
> > @@ -186,7 +186,7 @@ virCapsPtr virLXCDriverGetCapabilities(virLXCDriverPtr driver,
> >                                         bool refresh)
> >  {
> >      virCapsPtr ret;
> > -    if (refresh) {
> > +    if (refresh || !driver->caps) {
> >          virCapsPtr caps = NULL;
> >          if ((caps = virLXCDriverCapsInit(driver)) == NULL)
> >              return NULL;
> >
> 
> --
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Regards,
Daniel
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