[PATCH manager v2] ui: qemu: boot order: warn of missing pxe support for ovmf

[Dominik Csapak <d.csapak@proxmox.com>]

OVMF can only use PXE/network boot when a virtual RNG device is added
for VMs, but this is not obvious from the UI or the error behavior.

Add a small warning to the boot order edit that says what is necessary.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Reviewed-by: Fiona Ebner <f.ebner@proxmox.com>
---
changes from v1:
* incorporated fionas feedback (thanks!)
* include r-b trailer from fiona

 www/manager6/qemu/BootOrderEdit.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/www/manager6/qemu/BootOrderEdit.js b/www/manager6/qemu/BootOrderEdit.js
index 521a3d6e..08e71913 100644
--- a/www/manager6/qemu/BootOrderEdit.js
+++ b/www/manager6/qemu/BootOrderEdit.js
@@ -26,6 +26,7 @@ Ext.define('PVE.qemu.BootOrderPanel', {
             let grid = me.lookup('grid');
             let marker = me.lookup('marker');
             let emptyWarning = me.lookup('emptyWarning');
+            let rngPxeWarning = me.lookup('rngPxeWarning');
 
             marker.originalValue = undefined;
 
@@ -43,6 +44,14 @@ Ext.define('PVE.qemu.BootOrderPanel', {
                         view.inUpdate = false;
                         marker.checkDirty();
                         emptyWarning.setHidden(val !== '');
+
+                        let showRngPxeWarning =
+                            view.vmconfig?.bios === 'ovmf' &&
+                            !view.vmconfig?.rng0 &&
+                            val?.includes('net');
+
+                        rngPxeWarning.setHidden(!showRngPxeWarning);
+
                         grid.getView().refresh();
                     },
                 },
@@ -238,6 +247,13 @@ Ext.define('PVE.qemu.BootOrderPanel', {
             userCls: 'pmx-hint',
             value: gettext('Warning: No devices selected, the VM will probably not boot!'),
         },
+        {
+            xtype: 'displayfield',
+            reference: 'rngPxeWarning',
+            userCls: 'pmx-hint',
+            hidden: true,
+            value: gettext('Warning: For PXE boot with OVMF, you must add a VirtIO RNG device!'),
+        },
         {
             // for dirty marking and 'reset' function
             xtype: 'field',
-- 
2.47.3