Before stopping a VM (KVM or LXC), the UI now checks if there is an
active shutdown task for the same VM by the logged-in user. If there
is at least one, the UI asks whether these tasks should be aborted
before trying to stop the VM. If the user answers "Yes", the UI sends
a VM stop request with the `overrule-shutdown` parameter set to 1. If
there are no active shutdown tasks, or the user answers "No", the UI
sends a VM stop request without `overrule-shutdown`.

To avoid an additional API request for querying active shutdown tasks,
we check the UI's current view of cluster tasks instead, which we
fetch from the `pve-cluster-tasks` store.

As the UI might hold an outdated task list, there are some
opportunities for races, e.g., the UI may miss a new shutdown task or
consider a shutdown task active even though it has already terminated.
These races either result in a surviving shutdown task that the user
still needs to abort manually, or a superfluous `override-shutdown=1`
parameter that does not actually abort any tasks. Since "stop
overrules shutdown" is merely a convenience feature, both outcomes
seem bearable.

Signed-off-by: Friedrich Weber <f.we...@proxmox.com>
---
 www/manager6/Utils.js        | 27 +++++++++++++++++++++++++++
 www/manager6/dc/Tasks.js     |  2 +-
 www/manager6/lxc/CmdMenu.js  | 14 +++++++++++++-
 www/manager6/lxc/Config.js   |  6 +++++-
 www/manager6/qemu/CmdMenu.js | 14 +++++++++++++-
 www/manager6/qemu/Config.js  |  9 ++++++++-
 6 files changed, 67 insertions(+), 5 deletions(-)

diff --git a/www/manager6/Utils.js b/www/manager6/Utils.js
index 3dd287e3..9e25e647 100644
--- a/www/manager6/Utils.js
+++ b/www/manager6/Utils.js
@@ -1426,6 +1426,33 @@ Ext.define('PVE.Utils', {
        }
     },
 
+    // If there is an active task of type `taskType` by the current user for 
the
+    // given VMID, ask whether it should be aborted. Call `callback` 
accordingly.
+    askForOverruleShutdown: function(guestType, vm, taskType, callback) {
+       const vmidString = vm.vmid.toString();
+       const haEnabled = vm.hastate && vm.hastate !== 'unmanaged';
+       let shutdownTask = 
Ext.getStore('pve-cluster-tasks')?.findBy(function(task) {
+           return task.data.user === Proxmox.UserName &&
+                  task.data.id === vmidString &&
+                  task.data.status === undefined &&
+                  task.data.type === taskType;
+       });
+       if (!haEnabled && shutdownTask >= 0) {
+           const msg = gettext('There are active {0} tasks for {1} {2}. Would 
you like to abort them before proceeding?');
+           Ext.Msg.show({
+                        title: gettext('Confirm'),
+                        icon: Ext.Msg.QUESTION,
+                        buttons: Ext.Msg.YESNO,
+                        msg: Ext.String.format(msg, taskType, guestType, 
vmidString),
+                        callback: function(btn) {
+                            callback(btn === 'yes');
+                        },
+           });
+       } else {
+           callback(false);
+       }
+    },
+
     // test automation helper
     call_menu_handler: function(menu, text) {
        let item = menu.query('menuitem').find(el => el.text === text);
diff --git a/www/manager6/dc/Tasks.js b/www/manager6/dc/Tasks.js
index 5344ede4..2001bf76 100644
--- a/www/manager6/dc/Tasks.js
+++ b/www/manager6/dc/Tasks.js
@@ -11,7 +11,7 @@ Ext.define('PVE.dc.Tasks', {
        let me = this;
 
        let taskstore = Ext.create('Proxmox.data.UpdateStore', {
-           storeid: 'pve-cluster-tasks',
+           storeId: 'pve-cluster-tasks',
            model: 'proxmox-tasks',
            proxy: {
                type: 'proxmox',
diff --git a/www/manager6/lxc/CmdMenu.js b/www/manager6/lxc/CmdMenu.js
index 56f36b5e..01631b1d 100644
--- a/www/manager6/lxc/CmdMenu.js
+++ b/www/manager6/lxc/CmdMenu.js
@@ -66,7 +66,19 @@ Ext.define('PVE.lxc.CmdMenu', {
                iconCls: 'fa fa-fw fa-stop',
                disabled: stopped,
                tooltip: Ext.String.format(gettext('Stop {0} immediately'), 
'CT'),
-               handler: () => confirmedVMCommand('stop'),
+               handler: () => {
+                   let msg = Proxmox.Utils.format_task_description('vzstop', 
info.vmid);
+                   Ext.Msg.confirm(gettext('Confirm'), msg, btn => {
+                       if (btn === 'yes') {
+                           PVE.Utils.askForOverruleShutdown('CT', info,
+                                                            'vzshutdown', 
overruleShutdown => {
+                               const param = overruleShutdown ? { 
'overrule-shutdown': 1 }
+                                                                    : 
undefined;
+                               vm_command('stop', param);
+                           });
+                       }
+                   });
+               },
            },
            {
                text: gettext('Reboot'),
diff --git a/www/manager6/lxc/Config.js b/www/manager6/lxc/Config.js
index 23c17d2e..21d93058 100644
--- a/www/manager6/lxc/Config.js
+++ b/www/manager6/lxc/Config.js
@@ -81,7 +81,11 @@ Ext.define('PVE.lxc.Config', {
                    tooltip: Ext.String.format(gettext('Stop {0} immediately'), 
'CT'),
                    dangerous: true,
                    handler: function() {
-                       vm_command("stop");
+                       PVE.Utils.askForOverruleShutdown('CT', vm,
+                                                        'vzshutdown', 
overruleShutdown => {
+                           const param = overruleShutdown ? { 
'overrule-shutdown': 1 } : undefined;
+                           vm_command('stop', param);
+                       });
                    },
                    iconCls: 'fa fa-stop',
                }],
diff --git a/www/manager6/qemu/CmdMenu.js b/www/manager6/qemu/CmdMenu.js
index ccc5f74d..3edd2550 100644
--- a/www/manager6/qemu/CmdMenu.js
+++ b/www/manager6/qemu/CmdMenu.js
@@ -93,7 +93,19 @@ Ext.define('PVE.qemu.CmdMenu', {
                iconCls: 'fa fa-fw fa-stop',
                disabled: stopped,
                tooltip: Ext.String.format(gettext('Stop {0} immediately'), 
'VM'),
-               handler: () => confirmedVMCommand('stop'),
+               handler: () => {
+                   let msg = Proxmox.Utils.format_task_description('qmstop', 
info.vmid);
+                   Ext.Msg.confirm(gettext('Confirm'), msg, btn => {
+                       if (btn === 'yes') {
+                           PVE.Utils.askForOverruleShutdown('VM', info,
+                                                            'qmshutdown', 
overruleShutdown => {
+                               const param = overruleShutdown ? { 
'overrule-shutdown': 1 }
+                                                                    : 
undefined;
+                               vm_command('stop', param);
+                           });
+                       }
+                   });
+               },
            },
            {
                text: gettext('Reboot'),
diff --git a/www/manager6/qemu/Config.js b/www/manager6/qemu/Config.js
index 94c540c5..68c41454 100644
--- a/www/manager6/qemu/Config.js
+++ b/www/manager6/qemu/Config.js
@@ -180,7 +180,14 @@ Ext.define('PVE.qemu.Config', {
                    tooltip: Ext.String.format(gettext('Stop {0} immediately'), 
'VM'),
                    confirmMsg: Proxmox.Utils.format_task_description('qmstop', 
vmid),
                    handler: function() {
-                       vm_command("stop", { timeout: 30 });
+                       PVE.Utils.askForOverruleShutdown('VM', vm,
+                                                        'qmshutdown', 
overruleShutdown => {
+                           const param = { timeout: 30 };
+                           if (overruleShutdown) {
+                               param['overrule-shutdown'] = 1;
+                           }
+                           vm_command('stop', param);
+                       });
                    },
                    iconCls: 'fa fa-stop',
                }, {
-- 
2.30.2



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