qemu: Add qemuDomainCheckABIStability

When making ABI stability checks for an active domain, we need to make
sure we use the same migratable definition which virDomainGetXMLDesc
with the MIGRATABLE flag provides, otherwise the ABI check will fail.
This is implemented in the new qemuDomainCheckABIStability which takes a
domain object and generates the right migratable definition from it.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>

src/qemu/qemu_domain.c

@@ -5919,6 +5919,10 @@ qemuDomainMigratableDefCheckABIStability(virQEMUDriverPtr driver,
 }
 
 
+#define COPY_FLAGS (VIR_DOMAIN_XML_SECURE | \
+                    VIR_DOMAIN_XML_UPDATE_CPU | \
+                    VIR_DOMAIN_XML_MIGRATABLE)
+
 bool
 qemuDomainDefCheckABIStability(virQEMUDriverPtr driver,
                                virDomainDefPtr src,
@@ -5926,13 +5930,10 @@ qemuDomainDefCheckABIStability(virQEMUDriverPtr driver,
 {
     virDomainDefPtr migratableDefSrc = NULL;
     virDomainDefPtr migratableDefDst = NULL;
-    const unsigned int flags = VIR_DOMAIN_XML_SECURE |
-                               VIR_DOMAIN_XML_UPDATE_CPU |
-                               VIR_DOMAIN_XML_MIGRATABLE;
     bool ret = false;
 
-    if (!(migratableDefSrc = qemuDomainDefCopy(driver, src, flags)) ||
-        !(migratableDefDst = qemuDomainDefCopy(driver, dst, flags)))
+    if (!(migratableDefSrc = qemuDomainDefCopy(driver, src, COPY_FLAGS)) ||
+        !(migratableDefDst = qemuDomainDefCopy(driver, dst, COPY_FLAGS)))
         goto cleanup;
 
     ret = qemuDomainMigratableDefCheckABIStability(driver,
@@ -5945,6 +5946,36 @@ qemuDomainDefCheckABIStability(virQEMUDriverPtr driver,
     return ret;
 }
 
+
+bool
+qemuDomainCheckABIStability(virQEMUDriverPtr driver,
+                            virDomainObjPtr vm,
+                            virDomainDefPtr dst)
+{
+    virDomainDefPtr migratableSrc = NULL;
+    virDomainDefPtr migratableDst = NULL;
+    char *xml = NULL;
+    bool ret = false;
+
+    if (!(xml = qemuDomainFormatXML(driver, vm, COPY_FLAGS)) ||
+        !(migratableSrc = qemuDomainDefFromXML(driver, xml)) ||
+        !(migratableDst = qemuDomainDefCopy(driver, dst, COPY_FLAGS)))
+        goto cleanup;
+
+    ret = qemuDomainMigratableDefCheckABIStability(driver,
+                                                   vm->def, migratableSrc,
+                                                   dst, migratableDst);
+
+ cleanup:
+    VIR_FREE(xml);
+    virDomainDefFree(migratableSrc);
+    virDomainDefFree(migratableDst);
+    return ret;
+}
+
+#undef COPY_FLAGS
+
+
 bool
 qemuDomainAgentAvailable(virDomainObjPtr vm,
                          bool reportError)

src/qemu/qemu_domain.h

@@ -666,6 +666,10 @@ bool qemuDomainDefCheckABIStability(virQEMUDriverPtr driver,
                                     virDomainDefPtr src,
                                     virDomainDefPtr dst);
 
+bool qemuDomainCheckABIStability(virQEMUDriverPtr driver,
+                                 virDomainObjPtr vm,
+                                 virDomainDefPtr dst);
+
 bool qemuDomainAgentAvailable(virDomainObjPtr vm,
                               bool reportError);