replace worker load/save with loadvm_commands, allow keeping surface content

Add worker->loadvm_commands.  qemu will uses this to send a series of
commands needed to restore state after savevm/loadvm and migration.
That will be one create-surface command per surface and one cursor-set
command for the local pointer.

The worker->save/load functions are not needed any more.
Likewise the interface->{get,set}_save_data callbacks.

Surfaces created via loadvm_commands *will* not be cleared.  Also
primary surfaces are not cleared any more (unconditionally, although
we could do that conditionally on loadvm using the flags field in
QXLSurfaceCreate).

1 files changed, 1 insertions, 4 deletions

diff --git a/server/vd_interface.h b/server/vd_interface.h
index 0f26822d..d3cf5cbe 100644
--- a/server/vd_interface.h
+++ b/server/vd_interface.h
@@ -103,8 +103,6 @@ struct QXLWorker {
     uint32_t major_version;
     void (*wakeup)(QXLWorker *worker);
     void (*oom)(QXLWorker *worker);
-    void (*save)(QXLWorker *worker);
-    void (*load)(QXLWorker *worker);
     void (*start)(QXLWorker *worker);
     void (*stop)(QXLWorker *worker);
     void (*update_area)(QXLWorker *qxl_worker, uint32_t surface_id,
@@ -120,6 +118,7 @@ struct QXLWorker {
     void (*reset_image_cache)(QXLWorker *worker);
     void (*reset_cursor)(QXLWorker *worker);
     void (*destroy_surface_wait)(QXLWorker *worker, uint32_t surface_id);
+    void (*loadvm_commands)(QXLWorker *worker, struct QXLCommandExt *ext, uint32_t count);
 };
 
 typedef struct DrawArea {
@@ -196,8 +195,6 @@ struct QXLInterface {
     int (*get_cursor_command)(QXLInstance *qin, struct QXLCommandExt *cmd);
     int (*req_cursor_notification)(QXLInstance *qin);
     void (*notify_update)(QXLInstance *qin, uint32_t update_id);
-    void (*set_save_data)(QXLInstance *qin, void *data, int size);
-    void *(*get_save_data)(QXLInstance *qin);
     int (*flush_resources)(QXLInstance *qin);
 };