migration: use QEMUFile for migration channel lifetime

As a start, use QEMUFile to store the destination and close it.
qemu_get_fd gets a file descriptor that will be used by the write
callbacks.

Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/include/migration/migration.h b/include/migration/migration.h
index cec8643870..1f8f305ac9 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -38,12 +38,13 @@ struct MigrationState
     QEMUBH *cleanup_bh;
 
     QEMUFile *file;
+    QEMUFile *migration_file;
+
     int fd;
-    int state;
     int (*get_error)(MigrationState *s);
-    int (*close)(MigrationState *s);
     int (*write)(MigrationState *s, const void *buff, size_t size);
-    void *opaque;
+
+    int state;
     MigrationParams params;
     int64_t total_time;
     int64_t downtime;