tree 0b52211a0a27137ef6147471b35259f9cbacbd17
parent dd04017914c3c656bbebc22e7899c40a79e520fc
author Hao Zhou <haoooamazing@google.com> 1688682844 +0000
committer Hao Zhou <haoooamazing@google.com> 1688769099 +0000

Add flags for bmc  modes transitions

1. When /run/bm-drive-cleaning-done.flag is present, it means cleaning
   is done and we are in BM_MODE. Also, it is acked by renaming flag to
   bm-drive-cleaning-done-ack.flag
2. if not case 1, when /run/bm-drive-cleaning-done-ack.flag is present,
   it means the cleaing is done and acked
3. if not case 2, when bm-ready.flag is present, it means we are in
   BM_CLEANING_MODE. /run/bm-drive-cleaning.flag is created if needed
4. otherwise, we are in NON_BM_MODE

Tested:
bm-ready.flag is not present. Respond Non-BM mode:

ipmitool raw 0x2e 0x32 0x79 0x2b 0x00 0x10
 79 2b 00 10 00

bm-ready.flah is present. For next call, respond Cleaning Mode and
bm-drive-cleaning.flag is created:

ipmitool raw 0x2e 0x32 0x79 0x2b 0x00 0x10
 79 2b 00 10 02

keep responding Cleaning Mode until bm-drive-cleaning-done.flag is
created. So cleaning is done and for next call, respond BM mode and
rename bm-drive-cleaning-done.flag to bm-drive-cleaning-done-ack.flag:

ipmitool raw 0x2e 0x32 0x79 0x2b 0x00 0x10
 79 2b 00 10 01

Change-Id: Id8a6049550631c30c68a536313b81a8d800fede0
Signed-off-by: Hao Zhou <haoooamazing@google.com>