End of migration for postcopy

Tweak the end of migration cleanup; we don't want to close stuff down
at the end of the main stream, since the postcopy is still sending pages
on the other thread.

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

1 files changed, 25 insertions, 1 deletions

diff --git a/migration/migration.c b/migration/migration.c
index db3d2dd43e..c5c977e737 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -325,13 +325,37 @@ static void process_incoming_migration_co(void *opaque)
 {
     QEMUFile *f = opaque;
     Error *local_err = NULL;
+    MigrationIncomingState *mis;
+    PostcopyState ps;
     int ret;
 
-    migration_incoming_state_new(f);
+    mis = migration_incoming_state_new(f);
     postcopy_state_set(POSTCOPY_INCOMING_NONE);
     migrate_generate_event(MIGRATION_STATUS_ACTIVE);
+
     ret = qemu_loadvm_state(f);
 
+    ps = postcopy_state_get();
+    trace_process_incoming_migration_co_end(ret, ps);
+    if (ps != POSTCOPY_INCOMING_NONE) {
+        if (ps == POSTCOPY_INCOMING_ADVISE) {
+            /*
+             * Where a migration had postcopy enabled (and thus went to advise)
+             * but managed to complete within the precopy period, we can use
+             * the normal exit.
+             */
+            postcopy_ram_incoming_cleanup(mis);
+        } else if (ret >= 0) {
+            /*
+             * Postcopy was started, cleanup should happen at the end of the
+             * postcopy thread.
+             */
+            trace_process_incoming_migration_co_postcopy_end_main();
+            return;
+        }
+        /* Else if something went wrong then just fall out of the normal exit */
+    }
+
     qemu_fclose(f);
     free_xbzrle_decoded_buf();
     migration_incoming_state_destroy();