[libvirt] [PATCHv2] Disable nwfilter driver when running unprivileged

[Ján Tomko]

When running unprivileged, nwfilter state already skips
most of the initialization. Also forbid opening connections
to the nwfilter driver when unprivileged.

This changes the nwfilter-define error from:
error: cannot create config directory (null): Bad address
To:
this function is not supported by the connection driver:
virNWFilterDefineXML

https://bugzilla.redhat.com/show_bug.cgi?id=1029266
---
v1: https://www.redhat.com/archives/libvir-list/2013-November/msg00368.html
v2: forbid everything instead of just virNWFilterDefineXML

 src/nwfilter/nwfilter_driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nwfilter/nwfilter_driver.c b/src/nwfilter/nwfilter_driver.c
index 6602d73..d6e492f 100644
--- a/src/nwfilter/nwfilter_driver.c
+++ b/src/nwfilter/nwfilter_driver.c
@@ -415,7 +415,7 @@ nwfilterOpen(virConnectPtr conn,
 {
     virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR);
 
-    if (!driverState)
+    if (!driverState || !driverState->privileged)
         return VIR_DRV_OPEN_DECLINED;
 
     conn->nwfilterPrivateData = driverState;
-- 
1.8.3.2