[PATCH 6/9] Add action classes for container member set management.
David Lehman
dlehman at redhat.com
Thu Mar 20 17:14:10 UTC 2014
---
blivet/deviceaction.py | 184 ++++++++++++++++++++++++++++++++++++++++++++++---
tests/action_test.py | 96 ++++++++++++++++++++++++++
2 files changed, 271 insertions(+), 9 deletions(-)
diff --git a/blivet/deviceaction.py b/blivet/deviceaction.py
index d9a6a87..569377a 100644
--- a/blivet/deviceaction.py
+++ b/blivet/deviceaction.py
@@ -1,8 +1,7 @@
# deviceaction.py
-# Device modification action classes for anaconda's storage configuration
-# module.
+# Device modification action classes.
#
-# Copyright (C) 2009 Red Hat, Inc.
+# Copyright (C) 2009-2014 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
@@ -49,19 +48,25 @@ ACTION_TYPE_NONE = 0
ACTION_TYPE_DESTROY = 1000
ACTION_TYPE_RESIZE = 500
ACTION_TYPE_CREATE = 100
+ACTION_TYPE_ADD = 50
+ACTION_TYPE_REMOVE = 10
action_strings = {ACTION_TYPE_NONE: "None",
ACTION_TYPE_DESTROY: "Destroy",
ACTION_TYPE_RESIZE: "Resize",
- ACTION_TYPE_CREATE: "Create"}
+ ACTION_TYPE_CREATE: "Create",
+ ACTION_TYPE_ADD: "Add",
+ ACTION_TYPE_REMOVE: "Remove"}
ACTION_OBJECT_NONE = 0
ACTION_OBJECT_FORMAT = 1
ACTION_OBJECT_DEVICE = 2
+ACTION_OBJECT_CONTAINER = 3
object_strings = {ACTION_OBJECT_NONE: "None",
ACTION_OBJECT_FORMAT: "Format",
- ACTION_OBJECT_DEVICE: "Device"}
+ ACTION_OBJECT_DEVICE: "Device",
+ ACTION_OBJECT_CONTAINER: "Container"}
RESIZE_SHRINK = 88
RESIZE_GROW = 89
@@ -148,6 +153,7 @@ class DeviceAction(util.ObjectID):
if not isinstance(device, StorageDevice):
raise ValueError("arg 1 must be a StorageDevice instance")
self.device = device
+ self.container = getattr(self.device, "container", None)
def execute(self):
""" perform the action """
@@ -178,10 +184,22 @@ class DeviceAction(util.ObjectID):
return (self.type == ACTION_TYPE_RESIZE and self.dir == RESIZE_GROW)
@property
+ def isAdd(self):
+ return self.type == ACTION_TYPE_ADD
+
+ @property
+ def isRemove(self):
+ return self.type == ACTION_TYPE_REMOVE
+
+ @property
def isDevice(self):
return self.obj == ACTION_OBJECT_DEVICE
@property
+ def isContainer(self):
+ return self.obj == ACTION_OBJECT_CONTAINER
+
+ @property
def isFormat(self):
return self.obj == ACTION_OBJECT_FORMAT
@@ -223,7 +241,7 @@ class DeviceAction(util.ObjectID):
return _(self.typeDescStr)
def __str__(self):
- s = "[%d] %s %s" % (self.id, self.typeString, self.objectString)
+ s = "[%d] %s" % (self.id, self.typeDescStr)
if self.isResize:
s += " (%s)" % self.resizeString
if self.isFormat:
@@ -273,6 +291,7 @@ class ActionCreateDevice(DeviceAction):
- this action's device depends on the other action's device
- both actions are partition create actions on the same disk
and this partition has a higher number
+ - the other action adds a member to this device's container
"""
rc = False
if self.device.dependsOn(action.device):
@@ -292,6 +311,9 @@ class ActionCreateDevice(DeviceAction):
self.device.vg == action.device.vg and
action.device.singlePV and not self.device.singlePV):
rc = True
+ elif (action.isAdd and action.container == self.container):
+ rc = True
+
return rc
@@ -325,6 +347,7 @@ class ActionDestroyDevice(DeviceAction):
- the other action's device depends on this action's device
- both actions are partition create actions on the same disk
and this partition has a lower number
+ - the other action removes this action's device from a container
"""
rc = False
if action.device.dependsOn(self.device) and action.isDestroy:
@@ -342,6 +365,8 @@ class ActionDestroyDevice(DeviceAction):
action.device.id == self.device.id):
# device destruction comes after destruction of device's format
rc = True
+ elif (action.isRemove and action.device == self.device):
+ rc = True
return rc
def obsoletes(self, action):
@@ -352,6 +377,10 @@ class ActionDestroyDevice(DeviceAction):
- obsoletes all but ActionDestroyFormat actions w/ lower id on the
same device if device exists
+
+ - obsoletes all actions that add a member to this action's
+ (container) device
+
"""
rc = False
if action.device.id == self.device.id:
@@ -361,6 +390,10 @@ class ActionDestroyDevice(DeviceAction):
self.device.exists and \
not (action.isDestroy and action.isFormat):
rc = True
+ elif action.isAdd and (action.device == self.device):
+ rc = True
+ elif action.isAdd and (action.container == self.device):
+ rc = True
return rc
@@ -413,6 +446,8 @@ class ActionResizeDevice(DeviceAction):
this action's device depends on
- the other action shrinks a device (or format it contains)
that depends on this action's device
+ - the other action removes this action's device from a container
+ - the other action adds a member to this device's container
"""
retval = False
if action.isResize:
@@ -424,6 +459,10 @@ class ActionResizeDevice(DeviceAction):
retval = True
elif action.isShrink and action.device.dependsOn(self.device):
retval = True
+ elif (action.isRemove and action.device == self.device):
+ rc = True
+ elif (action.isAdd and action.container == self.container):
+ rc = True
return retval
@@ -488,12 +527,14 @@ class ActionCreateFormat(DeviceAction):
Format create action can require another action if:
- this action's device depends on the other action's device
- and the other action is not a device destroy action
+ and the other action is not a device destroy action or a
+ container action
- the other action is a create or resize of this action's
device
"""
return ((self.device.dependsOn(action.device) and
- not (action.isDestroy and action.isDevice)) or
+ not ((action.isDestroy and action.isDevice) or
+ action.isContainer)) or
(action.isDevice and (action.isCreate or action.isResize) and
self.device.id == action.device.id))
@@ -545,8 +586,15 @@ class ActionDestroyFormat(DeviceAction):
- the other action's device depends on this action's device
and the other action is a destroy action
+ - the other action removes this action's device from a container
"""
- return action.device.dependsOn(self.device) and action.isDestroy
+ retval = False
+ if action.device.dependsOn(self.device) and action.isDestroy:
+ retval = True
+ elif (action.isRemove and action.device == self.device):
+ rc = True
+
+ return retval
def obsoletes(self, action):
""" Return True if this action obsoletes action.
@@ -611,6 +659,7 @@ class ActionResizeFormat(DeviceAction):
that depends on this action's device
- the other action grows a device (or format) that this
action's device depends on
+ - the other action removes this action's device from a container
"""
retval = False
if action.isResize:
@@ -622,5 +671,122 @@ class ActionResizeFormat(DeviceAction):
retval = True
elif action.isGrow and self.device.dependsOn(action.device):
retval = True
+ elif (action.isRemove and action.device == self.device):
+ rc = True
+
+ return retval
+
+
+class ActionAddMember(DeviceAction):
+ """ An action representing addition of a member device to a container. """
+ type = ACTION_TYPE_ADD
+ obj = ACTION_OBJECT_CONTAINER
+ typeDescStr = N_("add container member")
+
+ def __init__(self, container, device):
+ super(ActionAddMember, self).__init__(device)
+ self.container = container
+ container._addMember(device)
+
+ def cancel(self):
+ self.container._removeMember(self.device)
+
+ def execute(self):
+ self.container.add(self.device)
+
+ def requires(self, action):
+ """
+ requires
+ - create/resize the same device
+
+ required by
+ - any create/grow action on a device in the same container
+ """
+ retval = False
+ if ((action.isCreate or action.isResize) and
+ action.device == self.device):
+ retval = True
+
+ return retval
+
+ def obsoletes(self, action):
+ """
+ obsoletes
+ - remove same member from same container
+ - add same member to same container w/ higher id
+
+ obsoleted by
+ - destroy the container
+ - destroy the device
+ - remove same member from same container
+ """
+ retval = False
+ if (action.isRemove and
+ action.device == self.device and
+ action.container == self.container):
+ retval = True
+ elif (action.isAdd and
+ action.device == self.device and
+ action.container == self.container and
+ action.id > self.id):
+ retval = True
+
+ return retval
+
+
+class ActionRemoveMember(DeviceAction):
+ """ An action representing removal of a member device from a container. """
+ type = ACTION_TYPE_REMOVE
+ obj = ACTION_OBJECT_CONTAINER
+ typeDescStr = N_("remove container member")
+
+ def __init__(self, container, device):
+ super(ActionRemoveMember, self).__init__(device)
+ self.container = container
+ container._removeMember(device)
+
+ def cancel(self):
+ self.container._addMember(self.device)
+
+ def execute(self):
+ self.container.remove(self.device)
+
+ def requires(self, action):
+ """
+ requires
+ - any destroy/shrink action on a device in the same container
+ - any add action on this container
+
+ required by
+ - any destroy/resize action on the device
+ """
+ retval = False
+ if ((action.isShrink or action.isDestroy) and
+ action.device.container == self.container):
+ retval = True
+ elif action.isAdd and action.container == self.container:
+ retval = True
+
+ return retval
+
+ def obsoletes(self, action):
+ """
+ obsoletes
+ - add same member to same container
+ - remove same member from same container w/ higher id
+
+ obsoleted by
+ - add same member to same container
+ """
+ retval = False
+ if (action.isAdd and
+ action.device == self.device and
+ action.container == self.container):
+ retval = True
+ elif (action.isRemove and
+ action.device == self.device and
+ action.container == self.container and
+ action.id > self.id):
+ retval = True
return retval
diff --git a/tests/action_test.py b/tests/action_test.py
index 9c1bac8..e063fba 100644
--- a/tests/action_test.py
+++ b/tests/action_test.py
@@ -914,6 +914,102 @@ class DeviceActionTestCase(StorageTestCase):
self.assertEqual(destroy_pv_format.requires(destroy_lv_format), True)
self.assertEqual(destroy_lv_format.requires(destroy_pv_format), False)
+ def testContainerActions(self):
+ self.destroyAllDevices()
+ sda = self.storage.devicetree.getDeviceByName("sda")
+ sdb = self.storage.devicetree.getDeviceByName("sdb")
+
+ #
+ # create something like an existing lvm autopart layout across two disks
+ #
+ sda1 = self.newDevice(device_class=PartitionDevice,
+ exists=True, name="sda1", parents=[sda],
+ size=Size(spec="500 MiB"))
+ sda1.format = self.newFormat("ext4", mountpoint="/boot",
+ device_instance=sda1,
+ device=sda1.path, exists=True)
+ self.storage.devicetree._addDevice(sda1)
+
+ sda2 = self.newDevice(device_class=PartitionDevice,
+ size=Size(spec="99.5 GiB"), name="sda2",
+ parents=[sda], exists=True)
+ sda2.format = self.newFormat("lvmpv", device=sda2.path, exists=True)
+ self.storage.devicetree._addDevice(sda2)
+
+ sdb1 = self.newDevice(device_class=PartitionDevice,
+ size=Size(spec="99.999 GiB"), name="sdb1",
+ parents=[sdb], exists=True)
+ sdb1.format = self.newFormat("lvmpv", device=sdb1.path, exists=True)
+ self.storage.devicetree._addDevice(sdb1)
+
+ vg = self.newDevice(device_class=LVMVolumeGroupDevice,
+ name="VolGroup", parents=[sda2, sdb1],
+ exists=True)
+ self.storage.devicetree._addDevice(vg)
+
+ lv_root = self.newDevice(device_class=LVMLogicalVolumeDevice,
+ name="lv_root", parents=[vg],
+ size=Size(spec="160 GiB"), exists=True)
+ lv_root.format = self.newFormat("ext4", mountpoint="/",
+ device_instance=lv_root,
+ device=lv_root.path, exists=True)
+ self.storage.devicetree._addDevice(lv_root)
+
+ lv_swap = self.newDevice(device_class=LVMLogicalVolumeDevice,
+ name="lv_swap", parents=[vg],
+ size=Size(spec="4000 MiB"), exists=True)
+ lv_swap.format = self.newFormat("swap", device=lv_swap.path,
+ device_instance=lv_swap,
+ exists=True)
+ self.storage.devicetree._addDevice(lv_swap)
+
+ #
+ # test some modifications to the VG
+ #
+ sdc = self.storage.devicetree.getDeviceByName("sdc")
+ sdc1 = self.newDevice(device_class=PartitionDevice, name="sdc1",
+ size=Size(spec="50 GiB"), parents=[sdc])
+ sdc1_format = self.newFormat("lvmpv", device=sdc1.path)
+ create_sdc1 = self.scheduleCreateDevice(device=sdc1)
+ create_sdc1_format = self.scheduleCreateFormat(device=sdc1,
+ format=sdc1_format)
+
+ self.assertEqual(len(vg.parents), 2)
+
+ add_sdc1 = ActionAddMember(vg, sdc1)
+ self.assertEqual(len(vg.parents), 3)
+
+ self.assertEqual(add_sdc1.requires(create_sdc1), True)
+ self.assertEqual(add_sdc1.requires(create_sdc1_format), True)
+
+ new_lv = self.newDevice(device_class=LVMLogicalVolumeDevice,
+ name="newlv", parents=[vg],
+ size=Size(spec="20 GiB"))
+ create_new_lv = self.scheduleCreateDevice(device=new_lv)
+ new_lv_format = self.newFormat("xfs", device=new_lv.path)
+ create_new_lv_format = self.scheduleCreateFormat(device=new_lv,
+ format=new_lv_format)
+
+ self.assertEqual(create_new_lv.requires(add_sdc1), True)
+ self.assertEqual(create_new_lv_format.requires(add_sdc1), False)
+
+ self.storage.devicetree.cancelAction(create_new_lv_format)
+ self.storage.devicetree.cancelAction(create_new_lv)
+
+ remove_sdb1 = ActionRemoveMember(vg, sdb1)
+ self.assertEqual(len(vg.parents), 2)
+
+ self.assertEqual(remove_sdb1.requires(add_sdc1), True)
+
+ vg._addMember(sdb1)
+ remove_sdb1_2 = ActionRemoveMember(vg, sdb1)
+ self.assertEqual(remove_sdb1_2.obsoletes(remove_sdb1), False)
+ self.assertEqual(remove_sdb1.obsoletes(remove_sdb1_2), True)
+
+ remove_sdc1 = ActionRemoveMember(vg, sdc1)
+ self.assertEqual(remove_sdc1.obsoletes(add_sdc1), True)
+ self.assertEqual(add_sdc1.obsoletes(remove_sdc1), True)
+
def testActionSorting(self, *args, **kwargs):
""" Verify correct functioning of action sorting. """
pass
--
1.8.5.3
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