Gitiles
Code Review Sign In
gerrit.openbmc.org / openbmc / phosphor-time-manager / 86d80419c72699862ee498ec9e37fd02ccf3ebb1
commit86d80419c72699862ee498ec9e37fd02ccf3ebb1[log] [tgz]
authorLei YU <mine260309@gmail.com>Wed Jul 12 13:12:12 2017 +0800
committerLei YU <mine260309@gmail.com>Mon Oct 16 20:40:04 2017 +0800
tree3c2ffa9107ba13d59e159ad14daf714a5fc77b4d
parent23d06af53140366be1aba634014929182897174e [diff]
Use elog to throw exceptions

Use elog to throw exceptions and update unit tests

Change-Id: I338ded4403b3b559a84da311eda5ee15e712569a
Signed-off-by: Lei YU <mine260309@gmail.com>
4 files changed
tree: 3c2ffa9107ba13d59e159ad14daf714a5fc77b4d
  1. test/
  2. xyz/
  3. .gitignore
  4. bmc_epoch.cpp
  5. bmc_epoch.hpp
  6. bmc_time_change_listener.hpp
  7. bootstrap.sh
  8. configure.ac
  9. elog-errors.hpp
  10. epoch_base.cpp
  11. epoch_base.hpp
  12. host_epoch.cpp
  13. host_epoch.hpp
  14. LICENSE
  15. main.cpp
  16. Makefile.am
  17. manager.cpp
  18. manager.hpp
  19. property_change_listener.hpp
  20. README.md
  21. settings.cpp
  22. settings.hpp
  23. types.hpp
  24. utils.cpp
  25. utils.hpp
README.md

Introduction

phosphor-time-manager is the time manager service that implements dbus interface xyz/openbmc_project/Time/EpochTime.interface.yaml. User can get or set the BMC's or HOST's time via this interface.

General usage

The service xyz.openbmc_project.Time.Manager provides two objects on dbus:

  • /xyz/openbmc_project/time/bmc
  • /xyz/openbmc_project/time/host

where each object implements interface xyz.openbmc_project.Time.EpochTime.

User can directly get or set the property Elasped of the objects to get or set the time. For example on an authenticated session:

  • To get BMC's time:
    ### With busctl on BMC
busctl get-property xyz.openbmc_project.Time.Manager \
    /xyz/openbmc_project/time/bmc xyz.openbmc_project.Time.EpochTime Elapsed

### With REST API on remote host
curl -b cjar -k https://bmc-ip/xyz/openbmc_project/time/bmc
  • To set HOST's time:
    ### With busctl on BMC
busctl set-property xyz.openbmc_project.Time.Manager \
    /xyz/openbmc_project/time/host xyz.openbmc_project.Time.EpochTime \
    Elapsed t <value-in-microseconds>

### With REST API on remote host
curl -b cjar -k -H "Content-Type: application/json" -X PUT \
    -d '{"data": 1487304700000000}' \
    https://bmc-ip/xyz/openbmc_project/time/host/attr/Elapsed

Time settings

Getting BMC or HOST time is always allowed, but setting the time may not be allowed depending on below two settings in settings manager.

  • time_mode
    • NTP: Time is set via NTP server.
    • MANUAL: Time is set manually.
  • time_owner
    • BMC: BMC owns the time and can set the time.
    • HOST: Host owns the time and can set the time.
    • SPLIT: BMC and Host owns separate time.
    • BOTH: Both BMC and Host can set the time.

A summary of which cases the time can be set on BMC or HOST: Mode | Owner | Set BMC Time | Set Host Time --------- | ----- | ------------- | ------------------- NTP | BMC | Not allowed | Not allowed NTP | HOST | Not allowed | Not allowed NTP | SPLIT | Not allowed | OK NTP | BOTH | Not allowed | Not allowed MANUAL | BMC | OK | Not allowed MANUAL | HOST | Not allowed | OK MANUAL | SPLIT | OK | OK MANUAL | BOTH | OK | OK

Pgood

When host is on (pgood == 1), the changes of the above time mode/owner are not applied but deferred. The changes of the mode/owner are saved to persistent storage.

When host is off (pgood == 0), the saved mode/owner are read from persistent storage and are applied.

Note: user can set the time mode and owner in settings daemon at any time, but time manager applying them is governed by the above condition.