qemu: Make migration params usable outside migration

So far migration parameters were changed only at the beginning of
migration mostly via an automatic translation from flags and typed
parameters. We need to export a few more functions to support APIs which
may set migration parameters while migration is already running.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

src/qemu/qemu_migration_params.c

@@ -216,7 +216,7 @@ qemuMigrationParamsGetAlwaysOnCaps(qemuMigrationParty party)
 }
 
 
-static qemuMigrationParamsPtr
+qemuMigrationParamsPtr
 qemuMigrationParamsNew(void)
 {
     qemuMigrationParamsPtr params;
@@ -1039,6 +1039,20 @@ qemuMigrationParamsFetch(virQEMUDriverPtr driver,
 }
 
 
+int
+qemuMigrationParamsSetULL(qemuMigrationParamsPtr migParams,
+                          qemuMigrationParam param,
+                          unsigned long long value)
+{
+    if (qemuMigrationParamsCheckType(param, QEMU_MIGRATION_PARAM_TYPE_ULL) < 0)
+        return -1;
+
+    migParams->params[param].value.ull = value;
+    migParams->params[param].set = true;
+    return 0;
+}
+
+
 /**
  * Returns -1 on error,
  *          0 on success,

src/qemu/qemu_migration_params.h

@@ -84,8 +84,12 @@ qemuMigrationParamsDump(qemuMigrationParamsPtr migParams,
                         int *maxparams,
                         unsigned long *flags);
 
+qemuMigrationParamsPtr
+qemuMigrationParamsNew(void);
+
 void
 qemuMigrationParamsFree(qemuMigrationParamsPtr migParams);
+VIR_DEFINE_AUTOPTR_FUNC(qemuMigrationParams, qemuMigrationParamsFree)
 
 int
 qemuMigrationParamsApply(virQEMUDriverPtr driver,
@@ -112,6 +116,11 @@ qemuMigrationParamsFetch(virQEMUDriverPtr driver,
                          int asyncJob,
                          qemuMigrationParamsPtr *migParams);
 
+int
+qemuMigrationParamsSetULL(qemuMigrationParamsPtr migParams,
+                          qemuMigrationParam param,
+                          unsigned long long value);
+
 int
 qemuMigrationParamsGetULL(qemuMigrationParamsPtr migParams,
                           qemuMigrationParam param,