migration: Split save_live_pending() into state_pending_*

We split the function into to:

- state_pending_estimate: We estimate the remaining state size without
  stopping the machine.

- state pending_exact: We calculate the exact amount of remaining
  state.

The only "device" that implements different functions for _estimate()
and _exact() is ram.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/migration/savevm.h b/migration/savevm.h
index 524cf12f25..5d2cff4411 100644
--- a/migration/savevm.h
+++ b/migration/savevm.h
@@ -40,10 +40,14 @@ void qemu_savevm_state_cleanup(void);
 void qemu_savevm_state_complete_postcopy(QEMUFile *f);
 int qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only,
                                        bool inactivate_disks);
-void qemu_savevm_state_pending(uint64_t max_size,
-                               uint64_t *res_precopy_only,
-                               uint64_t *res_compatible,
-                               uint64_t *res_postcopy_only);
+void qemu_savevm_state_pending_exact(uint64_t threshold_size,
+                                     uint64_t *res_precopy_only,
+                                     uint64_t *res_compatible,
+                                     uint64_t *res_postcopy_only);
+void qemu_savevm_state_pending_estimate(uint64_t thershold_size,
+                                        uint64_t *res_precopy_only,
+                                        uint64_t *res_compatible,
+                                        uint64_t *res_postcopy_only);
 void qemu_savevm_send_ping(QEMUFile *f, uint32_t value);
 void qemu_savevm_send_open_return_path(QEMUFile *f);
 int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len);