From 240bdcbc93fe40861b0f2bfa2be81570780938e8 Mon Sep 17 00:00:00 2001
From: Hiroki Narukawa <hnarukaw@yahoo-corp.jp>
Date: Thu, 9 Sep 2021 12:34:45 +0900
Subject: [PATCH] virDomainDiskDefCheckABIStability: add disk queue count ABI
 stability check

virtio-blk num-queue is visible to guest OS, so this must be kept while
live migration.

Signed-off-by: Hiroki Narukawa <hnarukaw@yahoo-corp.jp>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
---
 src/conf/domain_conf.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 6c32609431..47127683d4 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -20767,6 +20767,13 @@ virDomainDiskDefCheckABIStability(virDomainDiskDef *src,
         return false;
     }
 
+    if (src->queues != dst->queues) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                       _("Target disk queue count %u does not match source %u"),
+                       dst->queues, src->queues);
+        return false;
+    }
+
     if (!virDomainVirtioOptionsCheckABIStability(src->virtio, dst->virtio))
         return false;