Add a migration capability 'colo'. If this capability is on,
The migration will never end, and the VM will be continuously
checkpointed.
Signed-off-by: Yang Hongyang <yan...@cn.fujitsu.com>
---
migration.c | 8 ++++++++
qapi-schema.json | 5 ++++-
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/migration.c b/migration.c
index 8d675b3..5d28237 100644
--- a/migration.c
+++ b/migration.c
@@ -25,6 +25,7 @@
#include "qemu/thread.h"
#include "qmp-commands.h"
#include "trace.h"
+#include "migration/migration-colo.h"
enum {
MIG_STATE_ERROR = -1,
@@ -277,6 +278,13 @@ void
qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
}
for (cap = params; cap; cap = cap->next) {
+ if (cap->value->capability == MIGRATION_CAPABILITY_COLO &&
+ cap->value->state && !colo_supported()) {
+ error_setg(errp, "COLO is not currently supported, please rerun"
+ " configure with --enable-colo option in order to"
+ " support COLO feature");
+ continue;
+ }
s->enabled_capabilities[cap->value->capability] = cap->value->state;
}
}
diff --git a/qapi-schema.json b/qapi-schema.json
index 689b548..8d58ef7 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -491,10 +491,13 @@
# @auto-converge: If enabled, QEMU will automatically throttle down the guest
# to speed up convergence of RAM migration. (since 1.6)
#
+# @colo: If enabled, the migration will never end, and the VM will instead be
+# continuously checkpointed. (since 2.2)
+#
# Since: 1.2
##
{ 'enum': 'MigrationCapability',
- 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks'] }
+ 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks', 'colo'] }
##
# @MigrationCapabilityStatus
--
1.9.1
