migration: Split migration_fd_process_incoming

We need that on later patches.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>

migration/migration.c

@@ -372,9 +372,8 @@ static void process_incoming_migration_co(void *opaque)
     qemu_bh_schedule(mis->bh);
 }
 
-void migration_fd_process_incoming(QEMUFile *f)
+static void migration_incoming_setup(QEMUFile *f)
 {
-    Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, NULL);
     MigrationIncomingState *mis = migration_incoming_get_current();
 
     if (multifd_load_setup() != 0) {
@@ -387,9 +386,20 @@ void migration_fd_process_incoming(QEMUFile *f)
         mis->from_src_file = f;
     }
     qemu_file_set_blocking(f, false);
+}
+
+static void migration_incoming_process(void)
+{
+    Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, NULL);
     qemu_coroutine_enter(co);
 }
 
+void migration_fd_process_incoming(QEMUFile *f)
+{
+    migration_incoming_setup(f);
+    migration_incoming_process();
+}
+
 void migration_ioc_process_incoming(QIOChannel *ioc)
 {
     MigrationIncomingState *mis = migration_incoming_get_current();