Blame SOURCES/0004-allow-removing-btrfs-volumes-without-btrfs-support.patch

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From d2d9a4e0c086a0551dac644d45954f23e0116ef1 Mon Sep 17 00:00:00 2001
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From: Vojtech Trefny <vtrefny@redhat.com>
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Date: Wed, 12 Sep 2018 10:45:41 +0200
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Subject: [PATCH 1/2] Allow removing btrfs volumes without btrfs support
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Btrfs volumes are removed using wipefs so we don't need to check
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for device dependencies availability when removing the volume
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(btrfs support depends on libblockdev btrfs plugin).
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Resolves: rhbz#1605213
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---
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 blivet/deviceaction.py | 23 ++++++++++++++++++-----
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 1 file changed, 18 insertions(+), 5 deletions(-)
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diff --git a/blivet/deviceaction.py b/blivet/deviceaction.py
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index 3e337e18..b3e9e5f1 100644
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--- a/blivet/deviceaction.py
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+++ b/blivet/deviceaction.py
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@@ -160,15 +160,19 @@ class DeviceAction(util.ObjectID):
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         if not isinstance(device, StorageDevice):
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             raise ValueError("arg 1 must be a StorageDevice instance")
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-        unavailable_dependencies = device.unavailable_dependencies
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-        if unavailable_dependencies:
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-            dependencies_str = ", ".join(str(d) for d in unavailable_dependencies)
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-            raise DependencyError("device type %s requires unavailable_dependencies: %s" % (device.type, dependencies_str))
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-
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         self.device = device
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+
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+        self._check_device_dependencies()
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+
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         self.container = getattr(self.device, "container", None)
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         self._applied = False
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+    def _check_device_dependencies(self):
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+        unavailable_dependencies = self.device.unavailable_dependencies
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+        if unavailable_dependencies:
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+            dependencies_str = ", ".join(str(d) for d in unavailable_dependencies)
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+            raise DependencyError("device type %s requires unavailable_dependencies: %s" % (self.device.type, dependencies_str))
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+
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     def apply(self):
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         """ apply changes related to the action to the device(s) """
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         self._applied = True
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@@ -379,6 +383,15 @@ class ActionDestroyDevice(DeviceAction):
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         # XXX should we insist that device.fs be None?
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         DeviceAction.__init__(self, device)
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+    def _check_device_dependencies(self):
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+        if self.device.type == "btrfs volume":
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+            # XXX destroying a btrfs volume is a special case -- we don't destroy
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+            # the device, but use wipefs to destroy format on its parents so we
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+            # don't need btrfs plugin or btrfs-progs for this
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+            return
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+
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+        super(ActionDestroyDevice, self)._check_device_dependencies()
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+
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     def execute(self, callbacks=None):
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         super(ActionDestroyDevice, self).execute(callbacks=callbacks)
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         self.device.destroy()
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-- 
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2.17.1
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From a9bcf26e085160a84b78c396c33cd0a77a35a746 Mon Sep 17 00:00:00 2001
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From: Vojtech Trefny <vtrefny@redhat.com>
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Date: Mon, 17 Sep 2018 10:25:24 +0200
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Subject: [PATCH 2/2] Check device dependencies only for device actions
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We don't want to check device dependencies for format actions.
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It should be possible to for example format an opened LUKS device
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without libblockdev crypto plugin.
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Related: rhbz#1605213
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---
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 blivet/deviceaction.py                  | 3 ++-
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 1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/blivet/deviceaction.py b/blivet/deviceaction.py
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index b3e9e5f1..14a06ff0 100644
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--- a/blivet/deviceaction.py
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+++ b/blivet/deviceaction.py
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@@ -162,7 +162,8 @@ class DeviceAction(util.ObjectID):
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         self.device = device
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-        self._check_device_dependencies()
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+        if self.is_device:
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+            self._check_device_dependencies()
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         self.container = getattr(self.device, "container", None)
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         self._applied = False
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-- 
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2.17.1
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