[v2] lxc: Refresh capabilities if they have never been initalized

[libvirt] [PATCH v2] lxc: Refresh capabilities if they have never been initalized

Posted by Cole Robinson 4 years, 4 months ago

Adjust virLXCDriverGetCapabilities to fill in driver->caps if it is
empty, regardless of the passed 'refresh' value. This matches the
pattern used in virQEMUDriverGetCapabilities

This fixes LXC XML startup parsing for me

Signed-off-by: Cole Robinson <crobinso@redhat.com>
---
v2:
    Use the virQEMUDriverGetCapabilities like danpb suggested

 src/lxc/lxc_conf.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/lxc/lxc_conf.c b/src/lxc/lxc_conf.c
index 2df1537b22..adf7a0b66c 100644
--- a/src/lxc/lxc_conf.c
+++ b/src/lxc/lxc_conf.c
@@ -196,6 +196,14 @@ virCapsPtr virLXCDriverGetCapabilities(virLXCDriverPtr driver,
         driver->caps = caps;
     } else {
         lxcDriverLock(driver);
+
+        if (driver->caps == NULL ||
+            driver->caps->nguests == 0) {
+            VIR_DEBUG("Capabilities didn't detect any guests. Forcing a "
+                      "refresh.");
+            lxcDriverUnlock(driver);
+            return virLXCDriverGetCapabilities(driver, true);
+        }
     }
 
     ret = virObjectRef(driver->caps);
-- 
2.23.0

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Re: [libvirt] [PATCH v2] lxc: Refresh capabilities if they have never been initalized

Posted by Daniel P. Berrangé 4 years, 4 months ago

On Mon, Dec 09, 2019 at 02:58:51PM -0500, Cole Robinson wrote:
> Adjust virLXCDriverGetCapabilities to fill in driver->caps if it is
> empty, regardless of the passed 'refresh' value. This matches the
> pattern used in virQEMUDriverGetCapabilities
> 
> This fixes LXC XML startup parsing for me
> 
> Signed-off-by: Cole Robinson <crobinso@redhat.com>
> ---
> v2:
>     Use the virQEMUDriverGetCapabilities like danpb suggested
> 
>  src/lxc/lxc_conf.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

> diff --git a/src/lxc/lxc_conf.c b/src/lxc/lxc_conf.c
> index 2df1537b22..adf7a0b66c 100644
> --- a/src/lxc/lxc_conf.c
> +++ b/src/lxc/lxc_conf.c
> @@ -196,6 +196,14 @@ virCapsPtr virLXCDriverGetCapabilities(virLXCDriverPtr driver,
>          driver->caps = caps;
>      } else {
>          lxcDriverLock(driver);
> +
> +        if (driver->caps == NULL ||
> +            driver->caps->nguests == 0) {

nitpick:  nguests will never be zero in LXC since we hardcode the
set of guests, so you can drop that part of the condition when pushing.

> +            VIR_DEBUG("Capabilities didn't detect any guests. Forcing a "
> +                      "refresh.");
> +            lxcDriverUnlock(driver);
> +            return virLXCDriverGetCapabilities(driver, true);
> +        }
>      }
>  
>      ret = virObjectRef(driver->caps);

Regards,
Daniel
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