This capability allows Primary VM (PVM) to be continuously checkpointed
to secondary VM.
Signed-off-by: zhanghailiang <zhang.zhanghaili...@huawei.com>
Signed-off-by: Yang Hongyang <yan...@cn.fujitsu.com>
Signed-off-by: Gonglei <arei.gong...@huawei.com>
Signed-off-by: Lai Jiangshan <la...@cn.fujitsu.com>
---
include/migration/migration.h | 1 +
migration/migration.c | 15 +++++++++++++++
qapi-schema.json | 5 ++++-
3 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/include/migration/migration.h b/include/migration/migration.h
index f37348b..3f5c705 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -154,6 +154,7 @@ int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t
*dst, int dlen);
int migrate_use_xbzrle(void);
int64_t migrate_xbzrle_cache_size(void);
+bool migrate_enable_colo(void);
int64_t xbzrle_cache_resize(int64_t new_size);
diff --git a/migration/migration.c b/migration/migration.c
index b3adbc6..8403c8a 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -276,6 +276,15 @@ void
qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
}
for (cap = params; cap; cap = cap->next) {
+#ifndef CONFIG_COLO
+ if (cap->value->capability == MIGRATION_CAPABILITY_COLO &&
+ cap->value->state) {
+ error_setg(errp, "COLO is not currently supported, please"
+ " configure with --enable-colo option in order to"
+ " support COLO feature");
+ continue;
+ }
+#endif
s->enabled_capabilities[cap->value->capability] = cap->value->state;
}
}
@@ -585,6 +594,12 @@ int64_t migrate_xbzrle_cache_size(void)
return s->xbzrle_cache_size;
}
+bool migrate_enable_colo(void)
+{
+ MigrationState *s = migrate_get_current();
+ return s->enabled_capabilities[MIGRATION_CAPABILITY_COLO];
+}
+
/* migration thread support */
static void *migration_thread(void *opaque)
diff --git a/qapi-schema.json b/qapi-schema.json
index e16f8eb..8c59e50 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -494,10 +494,13 @@
# @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 2.3)
+#
# 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
--
1.7.12.4
