vmm, ch-remote: Add "local" option to send-migration API

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

vmm/src/api/mod.rs

@@ -195,6 +195,8 @@ pub struct VmReceiveMigrationData {
 pub struct VmSendMigrationData {
     /// URL to migrate the VM to
     pub destination_url: String,
+    /// Send memory across socket without copying
+    pub local: bool,
 }
 
 pub enum ApiResponsePayload {

vmm/src/lib.rs

@@ -1140,8 +1140,8 @@ impl Vmm {
         send_data_migration: VmSendMigrationData,
     ) -> result::Result<(), MigratableError> {
         info!(
-            "Sending migration: destination_url = {}",
-            send_data_migration.destination_url
+            "Sending migration: destination_url = {}, local = {}",
+            send_data_migration.destination_url, send_data_migration.local
         );
         if let Some(vm) = self.vm.as_mut() {
             Self::send_migration(