[PATCH manager v4 2/2] fix #7339: lvmthick: ui: add UI option to free storage

[Lukas Sichert <l.sichert@proxmox.com>]

In the commit 'fix #7339: lvmthick: add worker to free space of to be
deleted VMs' for the 'pve-storage' repo the backend received the
functionality to discard allocated space of a VM disk on a SAN, when a
VM is deleted. The backend checks whether to use this option by parsing
storage.cfg to see if 'issue-blkdiscard' is set to 1. This variable will
automatically be stored into the config file if it is present in the
'PUT' API request. To be able to append this to the API call, the
variable needs to be defined in the json-Schema, but this has also been
added in the previous commit.

To enable an option to free storage in the GUI, create a checkbox with
the name 'issue-blkdiscard'. In the checkbox use cbind to evaluate
'iscreate' from the component, to only auto-enable on new creations of
LVM Storages. This checkbox also adds the 'issue-blkdiscard'
variable and its value to the return call.

Also rename the 'imgdel' task description from 'Erase data' to
'Destroy disk', since the task can now also discard storage blocks in
addition to zeroing data.

Signed-off-by: Lukas Sichert <l.sichert@proxmox.com>
---
 www/manager6/Utils.js           |  2 +-
 www/manager6/storage/LVMEdit.js | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/www/manager6/Utils.js b/www/manager6/Utils.js
index 01e80682..417db00b 100644
--- a/www/manager6/Utils.js
+++ b/www/manager6/Utils.js
@@ -2151,7 +2151,7 @@ Ext.define('PVE.Utils', {
             hastart: ['HA', gettext('Start')],
             hastop: ['HA', gettext('Stop')],
             imgcopy: ['', gettext('Copy data')],
-            imgdel: ['', gettext('Erase data')],
+            imgdel: ['', gettext('Destroy image')],
             lvmcreate: [gettext('LVM Storage'), gettext('Create')],
             lvmremove: ['Volume Group', gettext('Remove')],
             lvmthincreate: [gettext('LVM-Thin Storage'), gettext('Create')],
diff --git a/www/manager6/storage/LVMEdit.js b/www/manager6/storage/LVMEdit.js
index 148f0601..56463bce 100644
--- a/www/manager6/storage/LVMEdit.js
+++ b/www/manager6/storage/LVMEdit.js
@@ -241,5 +241,20 @@ Ext.define('PVE.storage.LVMInputPanel', {
             uncheckedValue: 0,
             fieldLabel: gettext('Wipe Removed Volumes'),
         },
+        {
+            xtype: 'proxmoxcheckbox',
+            name: 'issue-blkdiscard',
+            uncheckedValue: 0,
+            cbind: {
+                checked: '{isCreate}',
+            },
+            fieldLabel: gettext('Discard Removed Volumes'),
+            autoEl: {
+                tag: 'div',
+                'data-qtip': gettext(
+                    'Enable to issue discard (TRIM) requests for logical volumes before removing them.',
+                ),
+            },
+        },
     ],
 });
-- 
2.47.3