tree 5f2a91e4e0ce48f19d114fef70e4cbf2abf0e109
parent 1e1c86cd640201795483b641caa8d98ecad04598
author xunchang <xunchang@google.com> 1556213856 -0700
committer xunchang <xunchang@google.com> 1556255932 -0700

Set the block device to be writable before writing verity data

The block device is set to be writable when the delta performer opens
the partition to perfrom writes. But if the update interrupts and the
device reboots during the verity data calculation, update engine will
consider the write actions done on resumes and skip setting the writable
flag. As a result, the resumed update will fail to write the hashtree
with EPERM.

A possible fix is to explicltly set the flag when the FilesystemVerifierAction
wants to write verity data.

Bug: 131232680
Test: Interrupt the update during verity writing, reboot and check the
update resumes correctly

Change-Id: I1007414139e4ae5be3fc60ec73b18264d4baa60e