commit 59e253e555072d11f3646fc1286459cbc6aa5419
author Alex Vakulenko <avakulenko@chromium.org> Mon Feb 24 10:40:21 2014 -0800
committer chrome-internal-fetch <chrome-internal-fetch@google.com> Tue Feb 25 22:12:31 2014 +0000
tree 720e3cde0cb4c1c235f04c776db6ce730ad525ff
parent 55f39b7043fae6b7c27188d0cd797946098b42ef

update_engine: added CanRollback dbus method

Added a method to the update engine to check if a rollback
partition is available and can be booted from.
update_engine_client is also updated to call the function
when --can_rollback paramater is specified

BUG=chromium:343301
TEST=Ran "update_engine_client --can_rollback" and unit tests

Change-Id: If3fcb29a0067069a22812f60e9b67c6fdbbd18bd
Reviewed-on: https://chromium-review.googlesource.com/187157
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>

update_engine.xml

diff --git a/update_engine.xml b/update_engine.xml
index 5a2b722..964ea62 100644
--- a/update_engine.xml
+++ b/update_engine.xml
@@ -26,6 +26,9 @@
     <method name="AttemptRollback">
       <arg type="b" name="powerwash" />
     </method>
+    <method name="CanRollback">
+      <arg type="b" name="can_rollback" direction="out" />
+    </method>
     <method name="ResetStatus">
     </method>
     <method name="GetStatus">