Add a pre-wipe fixup function for LVM logical volumes

Resolves: RHEL-68368

0038-Add-a-pre-wipe-fixup-function-for-LVM-logical-volume.patch

@@ -0,0 +1,65 @@
+From f70ee1ef08c20485f49b30fe1072a7ccafaaa2fe Mon Sep 17 00:00:00 2001
+From: Vojtech Trefny <vtrefny@redhat.com>
+Date: Fri, 1 Aug 2025 15:03:09 +0200
+Subject: [PATCH] Add a pre-wipe fixup function for LVM logical volumes
+
+LVs scheduled to be removed are always activated to remove the
+format during installation. If there is a read-only LV with the
+skip activation flag with MD metadata this means after activating
+the LV to remove the format the MD array is auto-assembled by udev
+preventing us from removing it. For this special case, we simply
+stop the array before removing the format.
+
+Resolves: RHEL-68368
+---
+ blivet/deviceaction.py |  3 +++
+ blivet/devices/lvm.py  | 19 +++++++++++++++++++
+ 2 files changed, 22 insertions(+)
+
+diff --git a/blivet/deviceaction.py b/blivet/deviceaction.py
+index a6fc211e..169c3a10 100644
+--- a/blivet/deviceaction.py
++++ b/blivet/deviceaction.py
+@@ -760,6 +760,9 @@ class ActionDestroyFormat(DeviceAction):
+             if hasattr(self.device, 'set_rw'):
+                 self.device.set_rw()
+ 
++            if hasattr(self.device, 'pre_format_destroy'):
++                self.device.pre_format_destroy()
++
+             self.format.destroy()
+             udev.settle()
+             if isinstance(self.device, PartitionDevice) and self.device.disklabel_supported:
+diff --git a/blivet/devices/lvm.py b/blivet/devices/lvm.py
+index a03d57f9..6ea35212 100644
+--- a/blivet/devices/lvm.py
++++ b/blivet/devices/lvm.py
+@@ -2695,6 +2695,25 @@ class LVMLogicalVolumeDevice(LVMLogicalVolumeBase, LVMInternalLogicalVolumeMixin
+         else:
+             blockdev.lvm.lvactivate(self.vg.name, self._name, ignore_skip=ignore_skip_activation)
+ 
++    def pre_format_destroy(self):
++        """ Fixup needed to run before wiping this device """
++        if self.ignore_skip_activation > 0:
++            # the LV was not activated during the initial scan so if there is an MD array on it
++            # it will now also get activated and we need to stop it to be able to remove the LV
++            try:
++                info = blockdev.md.examine(self.path)
++            except blockdev.MDRaidError:
++                pass
++            else:
++                # give udev a bit time to activate the array so we can deactivate it again
++                time.sleep(5)
++                log.info("MD metadata found on LV with skip activation, stopping the array %s",
++                         info.device)
++                try:
++                    blockdev.md.deactivate(info.device)
++                except blockdev.MDRaidError as err:
++                    log.info("failed to deactivate %s: %s", info.device, str(err))
++
+     @type_specific
+     def _pre_create(self):
+         LVMLogicalVolumeBase._pre_create(self)
+-- 
+2.50.1
+

python-blivet.spec

@@ -23,7 +23,7 @@ Version: 3.6.0
 
 #%%global prerelease .b2
 # prerelease, if defined, should be something like .a1, .b1, .b2.dev1, or .c2
-Release: 27%{?prerelease}%{?dist}
+Release: 28%{?prerelease}%{?dist}
 Epoch: 1
 License: LGPLv2+
 %global realname blivet
@@ -67,6 +67,7 @@ Patch33: 0034-Include-additional-information-in-PartitioningError.patch
 Patch34: 0035-LVMPV-format-size-fix.patch
 Patch35: 0036-Make-ActionDestroyFormat-optional.patch
 Patch36: 0037-Wipe-end-partition-before-creating-it-as-well-as-the-start.patch
+Patch37: 0038-Add-a-pre-wipe-fixup-function-for-LVM-logical-volume.patch
 
 # Versions of required components (done so we make sure the buildrequires
 # match the requires versions of things).
@@ -230,6 +231,10 @@ configuration.
 %endif
 
 %changelog
+* Mon Aug 04 2025 Vojtech Trefny <vtrefny@redhat.com> - 3.6.0-28
+- Add a pre-wipe fixup function for LVM logical volumes
+  Resolves: RHEL-68368
+
 * Fri May 30 2025 Vojtech Trefny <vtrefny@redhat.com> - 3.6.0-27
 - Wipe end partition before creating it as well as the start
   Resolves: RHEL-76917