Add the bcache backing partition usage

src/lib/autoinstall/presenters/partition.rb

@@ -49,6 +49,8 @@ def usage
           :lvm_pv
         elsif filesystem || mounted?
           :filesystem
+        elsif bcache_backing_for
+          :bcache_backing
         else
           :none
         end
@@ -161,6 +163,9 @@ def usage_label
         when :lvm_pv
           # TRANSLATORS: %s is a placeholder for the name of a RAID
           Kernel.format(_("Part of %s"), lvm_group)
+        when :bcache_backing
+          # TRANSLATORS: %s is a placeholder for the name of a bcache device
+          Kernel.format(_("Backing for %s"), bcache_backing_for)
         when :none
           _("Not used")
         end

src/lib/autoinstall/widgets/storage/bcache_backing_attrs.rb

@@ -0,0 +1,78 @@
+# Copyright (c) [2020] 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 "yast"
+require "cwm/custom_widget"
+require "autoinstall/widgets/storage/bcache_backing_for"
+
+module Y2Autoinstallation
+  module Widgets
+    module Storage
+      # Bcache backing device attributes
+      #
+      # It groups those attributes that are specific for a partition being used as a bcache backing
+      # device.
+      #
+      # @see PartitionUsageTab
+      class BcacheBackingAttrs < CWM::CustomWidget
+        # Constructor
+        #
+        # @param section [Presenters::Partition] presenter for the partition section
+        def initialize(section)
+          textdomain "autoinst"
+          super()
+          @section = section
+        end
+
+        # @macro seeAbstractWidget
+        def label
+          ""
+        end
+
+        # @macro seeCustomWidget
+        def contents
+          Left(HSquash(MinWidth(15, backing_for_widget)))
+        end
+
+        # @macro seeAbstractWidget
+        def init
+          backing_for_widget.items = section.available_bcaches
+          backing_for_widget.value = section.bcache_backing_for
+        end
+
+        # Returns the widgets values
+        #
+        # @return [Hash<String,Object>]
+        def values
+          { "bcache_backing_for" => backing_for_widget.value }
+        end
+
+      private
+
+        # @return [Presenters::Partition] presenter for the partition section
+        attr_reader :section
+
+        # Widget for setting the bcache backing device
+        def backing_for_widget
+          @backing_for_widget ||= BcacheBackingFor.new
+        end
+      end
+    end
+  end
+end

src/lib/autoinstall/widgets/storage/partition_usage_tab.rb

@@ -24,6 +24,7 @@
 require "autoinstall/widgets/storage/filesystem_attrs"
 require "autoinstall/widgets/storage/raid_attrs"
 require "autoinstall/widgets/storage/lvm_pv_attrs"
+require "autoinstall/widgets/storage/bcache_backing_attrs"
 require "autoinstall/widgets/storage/lvm_partition_attrs"
 require "autoinstall/widgets/storage/encryption_attrs"
 require "autoinstall/widgets/storage/size_selector"
@@ -105,6 +106,7 @@ def relevant_widgets
             filesystem_widget,
             raid_widget,
             lvm_pv_widget,
+            bcache_backing_widget,
             encryption_widget
           ]
         end
@@ -124,6 +126,11 @@ def lvm_pv_widget
           @lvm_pv_widget ||= LvmPvAttrs.new(partition)
         end
 
+        # Widget grouping attributes related to a bcache backing device
+        def bcache_backing_widget
+          @bcache_backing_widget ||= BcacheBackingAttrs.new(partition)
+        end
+
         # Widget for setting encryption related attributes
         def encryption_widget
           @encryption_widget ||= EncryptionAttrs.new(partition)

src/lib/autoinstall/widgets/storage/used_as.rb

@@ -54,9 +54,10 @@ def items
             # TRANSLATORS: option for setting the partition as a RAID member
             [:raid, _("RAID member")],
             # TRANSLATORS: option for setting the partition as an LVM physical volume
-            [:lvm_pv, _("LVM physical volume")]
+            [:lvm_pv, _("LVM physical volume")],
+            # TRANSLATORS: option for setting the partition as a bcache backing device
+            [:bcache_backing, _("Bcache backing device")]
             # ["bcache_caching", _("Bcache caching device")],
-            # ["bcache_backing", _("Bcache backing device")],
             # ["btrfs_member", _("Btrfs multi-device member")]
           ]
         end

test/lib/presenters/partition_test.rb

@@ -87,6 +87,14 @@
       end
     end
 
+    context "when the section refers to a bcache backing device" do
+      let(:attrs) { { bcache_backing_for: "/dev/bcache0" } }
+
+      it "returns :bcache_backing" do
+        expect(subject.usage).to eq(:bcache_backing)
+      end
+    end
+
     context "when the section does not refer an specific usage" do
       let(:attrs) { {} }
 

test/lib/widgets/storage/bcache_backing_attrs_test.rb

@@ -0,0 +1,73 @@
+# Copyright (c) [2020] 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_relative "../../../test_helper"
+require "y2storage"
+require "autoinstall/presenters"
+require "autoinstall/widgets/storage/bcache_backing_attrs"
+require "cwm/rspec"
+
+describe Y2Autoinstallation::Widgets::Storage::BcacheBackingAttrs do
+  subject(:widget) { described_class.new(section) }
+
+  include_examples "CWM::CustomWidget"
+
+  let(:drive) { Y2Autoinstallation::Presenters::Drive.new(partitioning.drives.first) }
+  let(:section) { drive.partitions.first }
+
+  let(:partitioning) do
+    Y2Storage::AutoinstProfile::PartitioningSection.new_from_hashes(
+      [
+        { "type" => :CT_DISK, "partitions" => [{}] },
+        { "type" => :CT_BCACHE, "device" => "/dev/bcache0" },
+        { "type" => :CT_BCACHE, "device" => "/dev/bcache1" }
+      ]
+    )
+  end
+
+  let(:backing_for_widget) do
+    instance_double(Y2Autoinstallation::Widgets::Storage::BcacheBackingFor, value: "/dev/bcache")
+  end
+
+  before do
+    allow(backing_for_widget).to receive(:items=)
+    allow(backing_for_widget).to receive(:value=)
+    allow(Y2Autoinstallation::Widgets::Storage::BcacheBackingFor)
+      .to receive(:new)
+      .and_return(backing_for_widget)
+  end
+
+  describe "#init" do
+    it "sets the available bcache devices" do
+      expect(backing_for_widget).to receive(:items=).with(["/dev/bcache0", "/dev/bcache1"])
+      widget.init
+    end
+
+    it "sets the backing device initial valaue" do
+      expect(backing_for_widget).to receive(:value=)
+      widget.init
+    end
+  end
+
+  describe "#values" do
+    it "includes bcache_backing_for" do
+      expect(widget.values).to include("bcache_backing_for" => "/dev/bcache")
+    end
+  end
+end

test/lib/widgets/storage/partition_usage_tab_test.rb

@@ -165,6 +165,24 @@
     end
   end
 
+  describe "#values" do
+    it "contains all section attributes related to its usage" do
+      expect(subject.values.keys).to contain_exactly(
+        "crypt_key",
+        "crypt_method",
+        "filesystem",
+        "fstab_options",
+        "label",
+        "lvm_group",
+        "mkfs_options",
+        "mount",
+        "mountby",
+        "raid_name",
+        "bcache_backing_for"
+      )
+    end
+  end
+
   describe "#store" do
     let(:filesystem_attrs) do
       {

test/lib/widgets/storage/used_as_test.rb

@@ -44,5 +44,9 @@
     it "includes :lvm_pv" do
       expect(items).to include(:lvm_pv)
     end
+
+    it "includes :bcache_backing" do
+      expect(items).to include(:bcache_backing)
+    end
   end
 end