Merge remote-tracking branch 'remotes/jnsnow/tags/bitmaps-pull-request' into staging

# gpg: Signature made Tue 13 Mar 2018 21:11:43 GMT
# gpg:                using RSA key 7DEF8106AAFC390E
# gpg: Good signature from "John Snow (John Huston) <jsnow@redhat.com>"
# Primary key fingerprint: FAEB 9711 A12C F475 812F  18F2 88A9 064D 1835 61EB
#      Subkey fingerprint: F9B7 ABDB BCAC DF95 BE76  CBD0 7DEF 8106 AAFC 390E

* remotes/jnsnow/tags/bitmaps-pull-request:
  iotests: add dirty bitmap postcopy test
  iotests: add dirty bitmap migration test
  migration: add postcopy migration of dirty bitmaps
  migration: allow qmp command migrate-start-postcopy for any postcopy
  migration: add is_active_iterate handler
  migration/qemu-file: add qemu_put_counted_string()
  migration: include migrate_dirty_bitmaps in migrate_postcopy
  qapi: add dirty-bitmaps migration capability
  migration: introduce postcopy-only pending
  dirty-bitmap: add locked state
  block/dirty-bitmap: add _locked version of bdrv_reclaim_dirty_bitmap
  block/dirty-bitmap: fix locking in bdrv_reclaim_dirty_bitmap
  block/dirty-bitmap: add bdrv_dirty_bitmap_enable_successor()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 15 insertions, 5 deletions

diff --git a/migration/savevm.c b/migration/savevm.c
index fbeac658c1..f417cef7d5 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1029,6 +1029,11 @@ int qemu_savevm_state_iterate(QEMUFile *f, bool postcopy)
                 continue;
             }
         }
+        if (se->ops && se->ops->is_active_iterate) {
+            if (!se->ops->is_active_iterate(se->opaque)) {
+                continue;
+            }
+        }
         /*
          * In the postcopy phase, any device that doesn't know how to
          * do postcopy should have saved it's state in the _complete
@@ -1221,13 +1226,15 @@ int qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only,
  * for units that can't do postcopy.
  */
 void qemu_savevm_state_pending(QEMUFile *f, uint64_t threshold_size,
-                               uint64_t *res_non_postcopiable,
-                               uint64_t *res_postcopiable)
+                               uint64_t *res_precopy_only,
+                               uint64_t *res_compatible,
+                               uint64_t *res_postcopy_only)
 {
     SaveStateEntry *se;
 
-    *res_non_postcopiable = 0;
-    *res_postcopiable = 0;
+    *res_precopy_only = 0;
+    *res_compatible = 0;
+    *res_postcopy_only = 0;
 
 
     QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
@@ -1240,7 +1247,8 @@ void qemu_savevm_state_pending(QEMUFile *f, uint64_t threshold_size,
             }
         }
         se->ops->save_live_pending(f, se->opaque, threshold_size,
-                                   res_non_postcopiable, res_postcopiable);
+                                   res_precopy_only, res_compatible,
+                                   res_postcopy_only);
     }
 }
 
@@ -1686,6 +1694,8 @@ static void loadvm_postcopy_handle_run_bh(void *opaque)
 
     trace_loadvm_postcopy_handle_run_vmstart();
 
+    dirty_bitmap_mig_before_vm_start();
+
     if (autostart) {
         /* Hold onto your hats, starting the CPU */
         vm_start();