tree f3fc0cf8dc6090da370fd9c1311b2c443db4a765
parent 70c3349d3c1dad47ded90d8da38811c1a8c3fef3
author Bertrand SIMONNET <bsimonnet@google.com> 1442610727 -0700
committer Bertrand SIMONNET <bsimonnet@google.com> 1442865820 -0700

rootdev: Don't try to access /dev/block.

When the device used to back a path is found in /sys/block, rootdev will
double check that /dev/block/<device name> exists and that the dev_t
matches the one in /sys/block/.
On Android, the manufacturer can add an SELinux context for that device
node which will prevent core daemons from accessing it, failing the call
to rootdev.

To avoid this, rootdev should return the device node path without trying
to access it.

BUG: 24143423
BUG: 24267261
TEST: metricsd starts and find the main disk without any SELinux denial.

Change-Id: I4c0fb2800ac84ff451974990c6228ee10528c0f0