[RFC PATCH 06/17] COLO restore: integrate COLO checkpointed restore into qemu restore

[Yang Hongyang <yanghy@xxxxxxxxxxxxxx>]

enter colo checkpointed restore loop after live migration.

Signed-off-by: Yang Hongyang <yanghy@xxxxxxxxxxxxxx>
---
 include/migration/migration-colo.h |  6 ++++++
 migration-colo-comm.c              | 10 ++++++++++
 migration-colo.c                   | 22 ++++++++++++++++++++++
 migration.c                        |  3 +++
 stubs/migration-colo.c             |  4 ++++
 5 files changed, 45 insertions(+)

diff --git a/include/migration/migration-colo.h b/include/migration/migration-colo.h
index 24589c0..861fa27 100644
--- a/include/migration/migration-colo.h
+++ b/include/migration/migration-colo.h
@@ -22,4 +22,10 @@ bool colo_supported(void);
 bool migrate_use_colo(void);
 void colo_init_checkpointer(MigrationState *s);
 
+/* restore */
+bool restore_use_colo(void);
+void restore_exit_colo(void);
+
+void colo_process_incoming_checkpoints(QEMUFile *f);
+
 #endif
diff --git a/migration-colo-comm.c b/migration-colo-comm.c
index 4504ceb..b12a57a 100644
--- a/migration-colo-comm.c
+++ b/migration-colo-comm.c
@@ -38,6 +38,16 @@ static void colo_info_save(QEMUFile *f, void *opaque)
 
 /* restore */
 
+bool restore_use_colo(void)
+{
+    return colo_requested;
+}
+
+void restore_exit_colo(void)
+{
+    colo_requested = false;
+}
+
 static int colo_info_load(QEMUFile *f, void *opaque, int version_id)
 {
     int value = qemu_get_byte(f);
diff --git a/migration-colo.c b/migration-colo.c
index 0cef8bd..d566b9d 100644
--- a/migration-colo.c
+++ b/migration-colo.c
@@ -10,6 +10,7 @@
 
 #include "qemu/main-loop.h"
 #include "qemu/thread.h"
+#include "block/coroutine.h"
 #include "migration/migration-colo.h"
 
 static QEMUBH *colo_bh;
@@ -62,3 +63,24 @@ void colo_init_checkpointer(MigrationState *s)
     colo_bh = qemu_bh_new(colo_start_checkpointer, s);
     qemu_bh_schedule(colo_bh);
 }
+
+/* restore */
+
+static Coroutine *colo;
+
+void colo_process_incoming_checkpoints(QEMUFile *f)
+{
+    if (!restore_use_colo()) {
+        return;
+    }
+
+    colo = qemu_coroutine_self();
+    assert(colo != NULL);
+
+    /* TODO: COLO checkpointed restore loop */
+
+    colo = NULL;
+    restore_exit_colo();
+
+    return;
+}
diff --git a/migration.c b/migration.c
index b7f8e7e..190571d 100644
--- a/migration.c
+++ b/migration.c
@@ -86,6 +86,9 @@ static void process_incoming_migration_co(void *opaque)
     int ret;
 
     ret = qemu_loadvm_state(f);
+    if (!ret) {
+        colo_process_incoming_checkpoints(f);
+    }
     qemu_fclose(f);
     free_xbzrle_decoded_buf();
     if (ret < 0) {
diff --git a/stubs/migration-colo.c b/stubs/migration-colo.c
index 9013c40..55f0d37 100644
--- a/stubs/migration-colo.c
+++ b/stubs/migration-colo.c
@@ -18,3 +18,7 @@ bool colo_supported(void)
 void colo_init_checkpointer(MigrationState *s)
 {
 }
+
+void colo_process_incoming_checkpoints(QEMUFile *f)
+{
+}
-- 
1.9.1

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