[libvirt] [PATCH v3 1/5] link-state: util: Add equality comparision functions for structures

[Peter Krempa]

This patch adds functions to compare structures containing network
device configuration for equality. They serve for the purpose of
disallowing unsupported changes to live network devices.
---
 src/util/network.c |   62 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/util/network.h |    5 ++++
 2 files changed, 67 insertions(+), 0 deletions(-)

diff --git a/src/util/network.c b/src/util/network.c
index 6fcdab2..ee69557 100644
--- a/src/util/network.c
+++ b/src/util/network.c
@@ -842,6 +842,43 @@ error:
     return ret;
 }

+bool
+virVirtualPortProfileEqual(virVirtualPortProfileParamsPtr a, virVirtualPortProfileParamsPtr b)
+{
+    /* NULL resistant */
+    if (!a && !b)
+        return true;
+
+    if (!a || !b)
+        return false;
+
+    if (a->virtPortType != b->virtPortType)
+        return false;
+
+    switch (a->virtPortType) {
+    case VIR_VIRTUALPORT_NONE:
+        break;
+
+    case VIR_VIRTUALPORT_8021QBG:
+        if (a->u.virtPort8021Qbg.managerID != b->u.virtPort8021Qbg.managerID ||
+            a->u.virtPort8021Qbg.typeID != b->u.virtPort8021Qbg.typeID ||
+            a->u.virtPort8021Qbg.typeIDVersion != b->u.virtPort8021Qbg.typeIDVersion ||
+            memcmp(a->u.virtPort8021Qbg.instanceID, b->u.virtPort8021Qbg.instanceID, VIR_UUID_BUFLEN) != 0)
+            return false;
+        break;
+
+    case VIR_VIRTUALPORT_8021QBH:
+        if (STRNEQ(a->u.virtPort8021Qbh.profileID, b->u.virtPort8021Qbh.profileID))
+            return false;
+        break;
+
+    default:
+        break;
+    }
+
+    return true;
+}
+
 void
 virVirtualPortProfileFormat(virBufferPtr buf,
                             virVirtualPortProfileParamsPtr virtPort,
@@ -1321,3 +1358,28 @@ cleanup:
     }
     return ret;
 }
+
+bool
+virBandwidthEqual(virBandwidthPtr a,
+                  virBandwidthPtr b)
+{
+        if (!a && !b)
+            return true;
+
+        if (!a || !b)
+            return false;
+
+        /* in */
+        if (a->in->average != b->in->average ||
+            a->in->peak != b->in->peak ||
+            a->in->burst != b->in->burst)
+            return false;
+
+        /*out*/
+        if (a->out->average != b->out->average ||
+            a->out->peak != b->out->peak ||
+            a->out->burst != b->out->burst)
+            return false;
+
+        return true;
+}
diff --git a/src/util/network.h b/src/util/network.h
index 6ceaa6d..4d195af 100644
--- a/src/util/network.h
+++ b/src/util/network.h
@@ -150,6 +150,8 @@ virVirtualPortProfileFormat(virBufferPtr buf,
                             virVirtualPortProfileParamsPtr virtPort,
                             const char *indent);

+bool virVirtualPortProfileEqual(virVirtualPortProfileParamsPtr a, virVirtualPortProfileParamsPtr b);
+
 virBandwidthPtr virBandwidthDefParseNode(xmlNodePtr node);
 void virBandwidthDefFree(virBandwidthPtr def);
 int virBandwidthDefFormat(virBufferPtr buf,
@@ -160,4 +162,7 @@ int virBandwidthEnable(virBandwidthPtr bandwidth, const char *iface);
 int virBandwidthDisable(const char *iface, bool may_fail);
 int virBandwidthCopy(virBandwidthPtr *dest, const virBandwidthPtr src);

+bool virBandwidthEqual(virBandwidthPtr a, virBandwidthPtr b);
+
+
 #endif /* __VIR_NETWORK_H__ */
-- 
1.7.3.4