From 528df523161aa424cc6dca69230eae1f9a503cef Mon Sep 17 00:00:00 2001
From: Fiona Ebner <f.ebner@proxmox.com>
Date: Thu, 25 Sep 2025 14:25:08 +0200
Subject: [PATCH] fix #6207: vm status: return undef values when disk{read,
 write} cannot be queried

If disk read/write cannot be queried because of QMP timeout, they
should not be reported as 0, because a consumer of the RRD stats
cannot distinguish between 0 being an actual 0 value and 0 being an
indicator for the absence of the real value. The RRD graphs in the UI
will already show this correctly.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Link: https://lore.proxmox.com/20250925122829.70121-2-f.ebner@proxmox.com
---
 src/PVE/QemuServer.pm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/PVE/QemuServer.pm b/src/PVE/QemuServer.pm
index f7f85436..d6d0cb13 100644
--- a/src/PVE/QemuServer.pm
+++ b/src/PVE/QemuServer.pm
@@ -2731,8 +2731,8 @@ sub vmstatus {
         $d->{netout} = 0;
         $d->{netin} = 0;
 
-        $d->{diskread} = 0;
-        $d->{diskwrite} = 0;
+        $d->{diskread} = undef;
+        $d->{diskwrite} = undef;
 
         $d->{template} = 1 if PVE::QemuConfig->is_template($conf);