[PATCH 48/68] qemu: Limit usage of qemuMonitorMigrationParams

[Jiri Denemark <jdenemar@xxxxxxxxxx>]

Use this internal structure only in qemu_migration_params.c and change
other non-test users to use the high level qemuMigrationParams struct.

Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
---
 src/qemu/qemu_driver.c           | 26 +++++++++++---------------
 src/qemu/qemu_migration_params.c | 16 ++++++++++++++++
 src/qemu/qemu_migration_params.h |  4 ++++
 3 files changed, 31 insertions(+), 15 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 8e880280ec..761f84ee7f 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -13555,8 +13555,7 @@ qemuDomainMigrateGetMaxDowntime(virDomainPtr dom,
 {
     virQEMUDriverPtr driver = dom->conn->privateData;
     virDomainObjPtr vm;
-    qemuDomainObjPrivatePtr priv;
-    qemuMonitorMigrationParams migparams = { 0 };
+    qemuMigrationParamsPtr migParams = NULL;
     int ret = -1;
 
     virCheckFlags(0, -1);
@@ -13576,27 +13575,24 @@ qemuDomainMigrateGetMaxDowntime(virDomainPtr dom,
         goto endjob;
     }
 
-    priv = vm->privateData;
-    qemuDomainObjEnterMonitor(driver, vm);
+    if (qemuMigrationParamsFetch(driver, vm, QEMU_ASYNC_JOB_NONE,
+                                 &migParams) < 0)
+        goto endjob;
 
-    if (qemuMonitorGetMigrationParams(priv->mon, &migparams) == 0) {
-        if (migparams.downtimeLimit_set) {
-            *downtime = migparams.downtimeLimit;
-            ret = 0;
-        } else {
-            virReportError(VIR_ERR_OPERATION_INVALID, "%s",
-                           _("Querying migration downtime is not supported by "
-                             "QEMU binary"));
-        }
+    if (qemuMigrationParamsGetDowntimeLimit(migParams, downtime) == 1) {
+        virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+                       _("Querying migration downtime is not supported by "
+                         "QEMU binary"));
+        goto endjob;
     }
 
-    if (qemuDomainObjExitMonitor(driver, vm) < 0)
-        ret = -1;
+    ret = 0;
 
  endjob:
     qemuDomainObjEndJob(driver, vm);
 
  cleanup:
+    qemuMigrationParamsFree(migParams);
     virDomainObjEndAPI(&vm);
     return ret;
 }
diff --git a/src/qemu/qemu_migration_params.c b/src/qemu/qemu_migration_params.c
index 642e4f314c..fd93d9cb39 100644
--- a/src/qemu/qemu_migration_params.c
+++ b/src/qemu/qemu_migration_params.c
@@ -550,6 +550,22 @@ qemuMigrationParamsFetch(virQEMUDriverPtr driver,
 }
 
 
+/**
+ * Returns  0 on success,
+ *          1 if the parameter is not supported by QEMU.
+ */
+int
+qemuMigrationParamsGetDowntimeLimit(qemuMigrationParamsPtr migParams,
+                                    unsigned long long *value)
+{
+    if (!migParams->params.downtimeLimit_set)
+        return 1;
+
+    *value = migParams->params.downtimeLimit;
+    return 0;
+}
+
+
 /**
  * qemuMigrationParamsCheck:
  *
diff --git a/src/qemu/qemu_migration_params.h b/src/qemu/qemu_migration_params.h
index cabf4cebe6..9fcd9825c8 100644
--- a/src/qemu/qemu_migration_params.h
+++ b/src/qemu/qemu_migration_params.h
@@ -79,6 +79,10 @@ qemuMigrationParamsFetch(virQEMUDriverPtr driver,
                          int asyncJob,
                          qemuMigrationParamsPtr *migParams);
 
+int
+qemuMigrationParamsGetDowntimeLimit(qemuMigrationParamsPtr migParams,
+                                    unsigned long long *value);
+
 int
 qemuMigrationParamsCheck(virQEMUDriverPtr driver,
                          virDomainObjPtr vm,
-- 
2.17.0

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