tree f6e8b94108ea7b08e32b0310b238c152fb561443
parent 6a5db3d3bfe5e6f3cec2ee0efd83ebb2d65b6093
author Carol Wang <wangkair@cn.ibm.com> 1582618774 +0800
committer Carol Wang <wangkair@cn.ibm.com> 1585548881 +0800

sched-host-tran: handle with BMC time changing

Handle with different processes when BMC time is changed after scheduled time
is set.

Tested:
Case1: BMC time is changed to be later than current time but still earlier than
scheduled time
1. Get current time
 # date
   Tue Feb 25 07:07:44 UTC 2020
 # date +%s
   1582614271
2. Schedule time, do host transition after at 07:20:00 around
 # busctl get-property xyz.openbmc_project.State.ScheduledHostTransition \
   /xyz/openbmc_project/state/host0 \
   xyz.openbmc_project.State.ScheduledHostTransition ScheduledTime
   t 1582615256
3. Change BMC time to 07:19:00 around
 # busctl set-property xyz.openbmc_project.Time.Manager \
   /xyz/openbmc_project/time/bmc xyz.openbmc_project.Time.EpochTime Elapsed \
   t 1582615136000000
 # date
   Tue Feb 25 07:19:20 UTC 2020
 # date +%s
   1582615187
4. Host transition is done after 1 minute around,
   instead of waiting 13 mins around.

Case2: BMC time is changed after scheduled time is reached
Following Case1, the scheduled time is reached already,
1. Change BMC time to 07:10:00 around
 # busctl set-property xyz.openbmc_project.Time.Manager \
   /xyz/openbmc_project/time/bmc xyz.openbmc_project.Time.EpochTime Elapsed \
   t 1582614600000000
2. APP shows "The function Scheduled Host Transition is disabled", because
   the scheduled time is reached already and the scheduled time has been set
   to 0 after host transition is triggered.

Case3: BMC time is changed to be bigger than scheduled time before scheduled
time is reached
1. Set scheduled time 07:08:00 around
 # busctl set-property xyz.openbmc_project.State.ScheduledHostTransition \
   /xyz/openbmc_project/state/host0 \
   xyz.openbmc_project.State.ScheduledHostTransition ScheduledTime t 1582787314
2. Change BMC time to 07:10:00 around
 # busctl set-property xyz.openbmc_project.Time.Manager \
   /xyz/openbmc_project/time/bmc xyz.openbmc_project.Time.EpochTime Elapsed \
   t 1582787434000000
3. It will do host transition as requested.

Case4: BMC time is changed to be earlier than current time
1. Set scheduled time 07:10:00 around
 # busctl set-property xyz.openbmc_project.State.ScheduledHostTransition \
   /xyz/openbmc_project/state/host0 \
   xyz.openbmc_project.State.ScheduledHostTransition ScheduledTime t 1582787434
2. Change BMC time to 07:08:00 around
 # busctl set-property xyz.openbmc_project.Time.Manager \
   /xyz/openbmc_project/time/bmc xyz.openbmc_project.Time.EpochTime Elapsed \
   t 1582787314000000
3. App will wait 2 minutes more to do host transition.

Change-Id: I23228be944d1b2f71161317228c8b16d7f5ca4eb
Signed-off-by: Carol Wang <wangkair@cn.ibm.com>