tree 7c0251088f6408d9dae826a791043b0a0526616c
parent dfbeae251c8ebe9939c6eb7241380d8cf4313169
author Adriana Kobylak <anoo@us.ibm.com> 1606775136 -0600
committer Adriana Kobylak <anoo@us.ibm.com> 1606832967 -0600

vpnor: Use the partition in rw if it exists

Look for the partition file in the rw directory first as the default.
This allows mboxd to support a single writable directory for the case
where the partition files (including the read-only ones) need to be
modified at runtime by the BMC, for example to support two different
configurations of a system using the same firmware image.

Tested: Enabled debug traces to check where the read and write requests
        were being fulfilled from and copied some partition files to
        the patch directory:
        On witherspoon, verified the reads/writes were done on the patch
        directory for the files that existed there, and reads were
        fulfilled from the ro dir, and writes from the rw dir.
        On rainier where all partitions exist in the rw dir, verified
        the reads/writes were done on the patch dir for the files that
        existed there, and reads/writes were done to the rw dir. For the
        HB_VOLATILE partition that gets erased, the ro dir was then used
        to read after it was deleted from the rw dir.

Change-Id: I3fe1875bd6a47aa82e9a1f23bc136a5a4f499c7f
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>