tree ac15a3dbb490cb0976bae3fa51bb811ae7eb74ba
parent e2e14ae8274ef85041bf3b25a87a465380fe2ced
author Dan Ehrenberg <dehrenberg@chromium.org> 1429725651 -0700
committer ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> 1430266890 +0000

cgpt: Handle read errors gracefully

When a read fails in getting the GPT, just zero the contents of the
buffer and carry on.

Some testing changes are required for this. When a read of the GPT
fails, it is no longer fatal, so tests of that have been adjusted.
Tests have been improved to show that the GPT is automatically
repaired when a read error occurs.
There was one test which checked that a zero-sized disk would fail
to load a kernel, but it was surrounded by a number of mocked
functions which normally do that error checking, and it amounted
to the same test as read failure; that test was deleted.

BUG=chrome-os-partner:35440
TEST=vboot tests pass
BRANCH=none

Change-Id: I0c05813e7492920433733947d3fb74a7e4aa66f2
Signed-off-by: Dan Ehrenberg <dehrenberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/266882
Reviewed-by: Randall Spangler <rspangler@chromium.org>