[libvirt] [PATCH] conf: replace call to virNetworkFree() with virOjectUnref()

Laine Stump laine at laine.org
Tue Nov 25 10:15:23 UTC 2014

The function virNetworkObjListExport() in network_conf.c had a call to
the public API virNetworkFree() which was causing a link error:

CCLD     libvirt_driver_vbox_network_impl.la
 ./.libs/libvirt_conf.a(libvirt_conf_la-network_conf.o): In function `virNetworkObjListExport':
/home/laine/devel/libvirt/src/conf/network_conf.c:4496: undefined reference to `virNetworkFree'

This would happen when I added

  #include "network_conf.h"

into domain_conf.c, then attempted to call a new function from that
file (and enum converter, similar to virNetworkForwardTypeToString())

In the end, virNetworkFree() ends up just calling virObjectUnref(obj)
anyway (after clearing all pending errors, which we probably *don't*
want to do in the cleanup of a utility function), so this is likely
more correct than the original code as well.

A quick look showed that there may be other places where we are
calling public APIs such as virNetworkFree and virDomainFree when we
really don't want to be clearning out the pending error - this would
result in the good old "an error was encountered but the cause is
unknown" type of log messages. It may warrant an audit...

 src/conf/network_conf.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/conf/network_conf.c b/src/conf/network_conf.c
index 067334e..a249e32 100644
--- a/src/conf/network_conf.c
+++ b/src/conf/network_conf.c
@@ -4463,10 +4463,8 @@ virNetworkObjListExport(virConnectPtr conn,
     if (tmp_nets) {
-        for (i = 0; i < nnets; i++) {
-            if (tmp_nets[i])
-                virNetworkFree(tmp_nets[i]);
-        }
+        for (i = 0; i < nnets; i++)
+            virObjectUnref(tmp_nets[i]);

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