conf: add function virDevicePCIAddressEqual

This function is needed by the network driver in a later commit.
It is useful in functions like networkNotifyActualDevice and
networkReleaseActualDevice

src/conf/device_conf.c

@@ -129,3 +129,19 @@ virDevicePCIAddressFormat(virBufferPtr buf,
                       addr.function);
     return 0;
 }
+
+int
+virDevicePCIAddressEqual(virDevicePCIAddress addr1,
+                         virDevicePCIAddress addr2)
+{
+    int ret = -1;
+
+    if (addr1.domain == addr2.domain &&
+        addr1.bus == addr2.bus &&
+        addr1.slot == addr2.slot &&
+        addr1.function == addr2.function) {
+        ret = 0;
+    }
+
+    return ret;
+}

src/conf/device_conf.h

@@ -59,6 +59,9 @@ int virDevicePCIAddressFormat(virBufferPtr buf,
                               virDevicePCIAddress addr,
                               bool includeTypeInAddr);
 
+int virDevicePCIAddressEqual(virDevicePCIAddress addr1,
+                             virDevicePCIAddress addr2);
+
 
 VIR_ENUM_DECL(virDeviceAddressPciMulti)
 

src/libvirt_private.syms

@@ -221,6 +221,7 @@ virStreamClass;
 # device_conf.h
 virDeviceAddressPciMultiTypeFromString;
 virDeviceAddressPciMultiTypeToString;
+virDevicePCIAddressEqual;
 virDevicePCIAddressFormat;
 virDevicePCIAddressIsValid;
 virDevicePCIAddressParseXML;