[libvirt] [PATCH] Give virNWFilterVarCombIterNext saner semantics

[Daniel P. Berrange]

The virNWFilterVarCombIterNext method will free its
parameter when it gets to the end of the iterator.
This is somewhat misleading design, making it appear
as if the caller has a memory leak. Remove the free'ing
of the parameter and ensure that the calling method
ebiptablesCreateRuleInstanceIterate free's it instead.

Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
 src/conf/nwfilter_params.c                |  4 +---
 src/nwfilter/nwfilter_ebiptables_driver.c | 12 ++++++------
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/src/conf/nwfilter_params.c b/src/conf/nwfilter_params.c
index a78c407..5393134 100644
--- a/src/conf/nwfilter_params.c
+++ b/src/conf/nwfilter_params.c
@@ -526,10 +526,8 @@ next:
         }
     }
 
-    if (ci->nIter == i) {
-        virNWFilterVarCombIterFree(ci);
+    if (ci->nIter == i)
         return NULL;
-    }
 
     return ci;
 }
diff --git a/src/nwfilter/nwfilter_ebiptables_driver.c b/src/nwfilter/nwfilter_ebiptables_driver.c
index 0505045..e1e0af8 100644
--- a/src/nwfilter/nwfilter_ebiptables_driver.c
+++ b/src/nwfilter/nwfilter_ebiptables_driver.c
@@ -2869,14 +2869,14 @@ ebiptablesCreateRuleInstanceIterate(
                              virNWFilterRuleInstPtr res)
 {
     int rc = 0;
-    virNWFilterVarCombIterPtr vciter;
+    virNWFilterVarCombIterPtr vciter, tmp;
 
     /* rule->vars holds all the variables names that this rule will access.
      * iterate over all combinations of the variables' values and instantiate
      * the filtering rule with each combination.
      */
-    vciter = virNWFilterVarCombIterCreate(vars,
-                                          rule->varAccess, rule->nVarAccess);
+    tmp = vciter = virNWFilterVarCombIterCreate(vars,
+                                                rule->varAccess, rule->nVarAccess);
     if (!vciter)
         return -1;
 
@@ -2885,12 +2885,12 @@ ebiptablesCreateRuleInstanceIterate(
                                           nwfilter,
                                           rule,
                                           ifname,
-                                          vciter,
+                                          tmp,
                                           res);
         if (rc < 0)
             break;
-        vciter = virNWFilterVarCombIterNext(vciter);
-    } while (vciter != NULL);
+        tmp = virNWFilterVarCombIterNext(tmp);
+    } while (tmp != NULL);
 
     virNWFilterVarCombIterFree(vciter);
 
-- 
1.8.5.3