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>

Change default time mode/owner to MANUAL/BOTH

OPAL gets error on setting host time because the default time mode/owner
is NTP/BMC, which disallows host to set its time.
As discussed and requested by

Change default time mode/owner to MANUAL/BOTH

OPAL gets error on setting host time because the default time mode/owner
is NTP/BMC, which disallows host to set its time.
As discussed and requested by OPAL, change the default time mode/owner
to MANUAL/BOTH.

Change-Id: Ide55f970b66f3025f67ad2ef093a74a3c8f8b8ea
Signed-off-by: Lei YU <mine260309@gmail.com>

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Implement mode/owner and string conversions

Move Manager::convertToMode() to utils::strToMode();
Move Manager::convertToOwner() to utils::strToOwner();
Add utils::modeToStr() and utils::ownerToStr()

Implement mode/owner and string conversions

Move Manager::convertToMode() to utils::strToMode();
Move Manager::convertToOwner() to utils::strToOwner();
Add utils::modeToStr() and utils::ownerToStr();
Adjust and add unit tests.

Change-Id: Ied35d0e732c477017e1b2db1a3464b0425b12387
Signed-off-by: Lei YU <mine260309@gmail.com>

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Use gmock on property_change_listener

1. Mock property_change_listener;
2. Make unit test link against gmock
3. Update TestManager to use mocked property change listener.
4. Fix an issue found by th

Use gmock on property_change_listener

1. Mock property_change_listener;
2. Make unit test link against gmock
3. Update TestManager to use mocked property change listener.
4. Fix an issue found by the updated test case, that when the properties
are changed during host is on, and changed back to the same as before,
when host becomes off, the properties shall remain the same and listeners
shall not be notified.

Change-Id: I815b59cb23edfcac910c2a8c26ea5a71e872d92f
Signed-off-by: Lei YU <mine260309@gmail.com>

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Invoke SetNTP and UpdateUseNtpField in time manager

1. When time mode is changed, invoke systemd timedate1's SetNTP
method to update NTP settings;
2. When settings use_dhcp_ntp property is changed,

Invoke SetNTP and UpdateUseNtpField in time manager

1. When time mode is changed, invoke systemd timedate1's SetNTP
method to update NTP settings;
2. When settings use_dhcp_ntp property is changed, invoke
NetworkManager's UpdateUseNtpField method to update its setting;
3. Move the common code of getProperty() into utils.hpp

Change-Id: I981e0e9de9c0430282b3364c38c282312bb2be89
Signed-off-by: Lei YU <mine260309@gmail.com>

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Implement HostEpoch set time logic

1. When setting host epoch, follow below logic:

Mode | Owner | Set Host Time
----- | ----- | -------------
NTP | BMC | Not allowed

Implement HostEpoch set time logic

1. When setting host epoch, follow below logic:

Mode | Owner | Set Host Time
----- | ----- | -------------
NTP | BMC | Not allowed
NTP | HOST | Not allowed
NTP | SPLIT | OK, and just save offset
NTP | BOTH | Not allowed
MANUAL| BMC | Not allowed
MANUAL| HOST | OK, and set time to BMC
MANUAL| SPLIT | OK, and just save offset
MANUAL| BOTH | OK, and set time to BMC

2. If owner is SPLIT and BMC time is changed, update the offset accordinly;
3. Use timerfd to get notified on BMC time change, and update host time
diff accordingly;
4. Add unit test cases.

Change-Id: I2d60a821f7da9b689c579ae7ab672cc37967322c
Signed-off-by: Lei YU <mine260309@gmail.com>

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Save properties to persistent storage when host is on

1. When host is on, set properties as requested properties instead
of notify listeners;
2. When host becomes off, and requested properties are n

Save properties to persistent storage when host is on

1. When host is on, set properties as requested properties instead
of notify listeners;
2. When host becomes off, and requested properties are not empty, notify
the listners and reset the requested properties.

Add unit tests.

Change-Id: I9359c801c698df0c6e5eab43e12427bb5a6da611
Signed-off-by: Lei YU <mine260309@gmail.com>

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Add time Manager to handle property changes callback

1. Implement time::Manager who registers property change signal for time
mode and owner;
2. Add PropertyChangeListner interface to handle the cal

Add time Manager to handle property changes callback

1. Implement time::Manager who registers property change signal for time
mode and owner;
2. Add PropertyChangeListner interface to handle the callback;
3. Make EpochBase to implement the interface.

Change-Id: I185580ae37353e1ed82a47e4905fb22e269ac09d
Signed-off-by: Lei YU <mine260309@gmail.com>

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Initial implementation of HostEpoch

When host time is set, the diff between the BmcTime and the value is
saved to persistent storage;
When host time is retrieved, return the BmcTime plus the diff as

Initial implementation of HostEpoch

When host time is set, the diff between the BmcTime and the value is
saved to persistent storage;
When host time is retrieved, return the BmcTime plus the diff as
host's time.

Add the unit test cases for HostEpoch.

Change-Id: Ia55b93bfcba4f226ceaed8491136ea7afda7bd77
Signed-off-by: Lei YU <mine260309@gmail.com>

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Implement BmcEpoch set/get elapsed()

Getting elapsed returns BMC's time;
Setting elapsed will check the current time mode/owner, and will return
error when mode is NTP or owner is HOST.

Add unit te

Implement BmcEpoch set/get elapsed()

Getting elapsed returns BMC's time;
Setting elapsed will check the current time mode/owner, and will return
error when mode is NTP or owner is HOST.

Add unit test cases.

Change-Id: Ibf4e90957f3b26b68c4a1b6dc66dc364c66bef10
Signed-off-by: Lei YU <mine260309@gmail.com>

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Implement part of BmcEpoch

Add BmcEpoch which inherits EpochBase and will handle times for BMC,
it is partly implemented.

Add unit test cases to test basic functions.

Change-Id: Ia5e4d0f884156d238

Implement part of BmcEpoch

Add BmcEpoch which inherits EpochBase and will handle times for BMC,
it is partly implemented.

Add unit test cases to test basic functions.

Change-Id: Ia5e4d0f884156d238f3f84df490a2efbce43e89a
Signed-off-by: Lei YU <mine260309@gmail.com>

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Intialize new phosphor-time-manager

phosphor-time-manager will be refactored to use sdbusplus interfaces.
This is a initial commit that EpochBase is implemented based on dbus
interface xyz/openbmc_p

Intialize new phosphor-time-manager

phosphor-time-manager will be refactored to use sdbusplus interfaces.
This is a initial commit that EpochBase is implemented based on dbus
interface xyz/openbmc_project/Time/EpochTime.interface.yaml.

EpochBase is the base class that wraps EpochTime interface, and is
initialized with time mode and owner from settingsd.

An initial unit test case is added.

Change-Id: Ic944b70f63ec3c0329762cc8874f0f57b09ddce3
Signed-off-by: Lei YU <mine260309@gmail.com>

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