tree e4264c34f02e30cf3aae911685971d69d6db662a
parent fedbf3d321aff7bc76955aaffff54e88edbe270f
author Michael Tritz <mtritz@us.ibm.com> 1511218601 -0600
committer Adriana Kobylak <anoo@linux.vnet.ibm.com> 1516745653 +0000

Host updater: Back up version priority in environment variables

This enhancement to the host updater adds an extra location for storing
redundancy priority values for host software versions. Priority values
are stored as environment variables in the format
pnor-[versionId]=[priority]. This addresses any scenario in which the
Cereal files storing these priority values are deleted, including (but
not limited to) a BMC factory reset.

Additionally, priority files are no longer removed during a host factory
reset. Removing these files makes restoration of the priority on reboot
impossible.

Resolves openbmc/openbmc#2666

Change-Id: I6b528e75785d48bbb5c8782e879b061934ad9432
Signed-off-by: Michael Tritz <mtritz@us.ibm.com>