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-rw-r--r--block/replication.c5
-rw-r--r--qapi/block-core.json3
2 files changed, 7 insertions, 1 deletions
diff --git a/block/replication.c b/block/replication.c
index 3bd1cf1809..8bbfc8f870 100644
--- a/block/replication.c
+++ b/block/replication.c
@@ -101,6 +101,11 @@ static int replication_open(BlockDriverState *bs, QDict *options,
 
     if (!strcmp(mode, "primary")) {
         s->mode = REPLICATION_MODE_PRIMARY;
+        top_id = qemu_opt_get(opts, REPLICATION_TOP_ID);
+        if (top_id) {
+            error_setg(&local_err, "The primary side does not support option top-id");
+            goto fail;
+        }
     } else if (!strcmp(mode, "secondary")) {
         s->mode = REPLICATION_MODE_SECONDARY;
         top_id = qemu_opt_get(opts, REPLICATION_TOP_ID);
diff --git a/qapi/block-core.json b/qapi/block-core.json
index c59047bc94..97b120532a 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -2197,7 +2197,8 @@
 # @mode: the replication mode
 #
 # @top-id: #optional In secondary mode, node name or device ID of the root
-#          node who owns the replication node chain. Ignored in primary mode.
+#          node who owns the replication node chain. Must not be given in
+#          primary mode.
 #
 # Since: 2.8
 ##