src/lib/y2partitioner/actions/delete_bcache.rb
# Copyright (c) [2018-2021] SUSE LLC
#
# All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2 of the GNU General Public License as published
# by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, contact SUSE LLC.
#
# To contact SUSE LLC about this file by physical or electronic mail, you may
# find current contact information at www.suse.com.
require "y2partitioner/actions/delete_device"
require "y2partitioner/actions/controllers/bcache"
require "y2partitioner/ui_state"
module Y2Partitioner
module Actions
# Action for deleting a Bcache, see {Actions::DeleteDevice}
class DeleteBcache < DeleteDevice
# Constructor
#
# @param bcache [Y2Storage::Bcache]
def initialize(bcache)
super
textdomain "storage"
@bcache_controller = Controllers::Bcache.new(bcache)
UIState.instance.select_row(bcache.sid)
end
private
# @return [Controllers::Bcache]
attr_reader :bcache_controller
# @see Actions::Base#errors
def errors
(super + [flash_only_error, unsafe_detach_error]).compact
end
# Error when the Bcache is Flash-only
#
# @return [String, nil] nil if the bcache is not Flash-only.
def flash_only_error
return nil unless flash_only_bcache?
# TRANSLATORS: error message, %{name} is replaced by a bcache name (e.g., /dev/bcache0)
format(
_("The device %{name} is a flash-only bcache. Deleting this kind of devices\n" \
"is not supported yet."),
name: bcache_controller.bcache.name
)
end
# Error when the caching set cannot be detached safely
#
# @see doc/bcache.md
#
# @return [String, nil] nil if detach is safe
def unsafe_detach_error
return nil if safe_detach_bcache?
# TRANSLATORS: Error message when detach is not a safe action
_(
"The bcache cannot be deleted because it shares its cache set with other devices.\n" \
"Deleting it without detaching the device first can result in unreachable space.\n" \
"Unfortunately detaching can take a very long time in some situations."
)
end
# Deletes the indicated Bcache (see {Actions::DeleteDevice#device})
def delete
bcache_controller.delete_bcache
end
# @see DeleteBlkDevice
def simple_confirm_text
bcache_cset_note + super
end
# @see DeleteBlkDevice
def recursive_confirm_text_below
bcache_cset_note + super
end
# Note explaining that the caching set will be deleted
#
# @return [String] empty string if the caching set is not going to be deleted.
def bcache_cset_note
# no note if there is no bcache cset associated or if cset is shared by more devices
return "" unless bcache_controller.single_committed_bcache_cset?
_(
"The selected bcache is the only one using its caching set.\n" \
"The caching set will be also deleted.\n\n"
)
end
# Whether the Bcache is Flash-only
#
# @return [Boolean]
def flash_only_bcache?
bcache_controller.bcache.flash_only?
end
# Whether the caching set can be safely detached
#
# @return [Boolean]
def safe_detach_bcache?
!bcache_controller.committed_bcache? ||
!bcache_controller.committed_bcache_cset? ||
bcache_controller.single_committed_bcache_cset?
end
end
end
end