Re: [Qemu-devel] [PATCH V8 10/17] qmp event: Add COLO_EXIT event to notify users while exited COLO

[Markus Armbruster <armbru@redhat.com>]

Eric Blake <eblake@redhat.com> writes:

> On 06/03/2018 12:05 AM, Zhang Chen wrote:
>> From: zhanghailiang <zhang.zhanghailiang@huawei.com>
>>
>> If some errors happen during VM's COLO FT stage, it's important to
>> notify the users of this event. Together with 'x-colo-lost-heartbeat',
>> Users can intervene in COLO's failover work immediately.
>> If users don't want to get involved in COLO's failover verdict,
>> it is still necessary to notify users that we exited COLO mode.
>>
>> Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
>> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
>> Signed-off-by: Zhang Chen <zhangckid@gmail.com>
>> Reviewed-by: Eric Blake <eblake@redhat.com>
>> ---
>>   migration/colo.c    | 31 +++++++++++++++++++++++++++++++
>>   qapi/migration.json | 38 ++++++++++++++++++++++++++++++++++++++
>>   2 files changed, 69 insertions(+)
>>
>> diff --git a/migration/colo.c b/migration/colo.c
>> index c083d3696f..bedb677788 100644
>> --- a/migration/colo.c
>
>>   +    /*
>> +     * There are only two reasons we can go here, some error happened.
>> +     * Or the user triggered failover.
>
> s/go here/get here/
> s/happened. Or/happened, or/
>
>> +++ b/qapi/migration.json
>> @@ -880,6 +880,44 @@
>>   { 'enum': 'FailoverStatus',
>>     'data': [ 'none', 'require', 'active', 'completed', 'relaunch' ] }
>> +##
>> +# @COLO_EXIT:
>> +#
>> +# Emitted when VM finishes COLO mode due to some errors happening or
>> +# at the request of users.
>> +#
>> +# @mode: report COLO mode when COLO exited.
>> +#
>> +# @reason: describes the reason for the COLO exit.
>> +#
>> +# Since: 2.13
>
> s/2.13/3.0/
>
>> +#
>> +# Example:
>> +#
>> +# <- { "timestamp": {"seconds": 2032141960, "microseconds": 417172},
>> +#      "event": "COLO_EXIT", "data": {"mode": "primary", "reason": "request" } }
>> +#
>> +##
>> +{ 'event': 'COLO_EXIT',
>> +  'data': {'mode': 'COLOMode', 'reason': 'COLOExitReason' } }
>> +
>> +##
>> +# @COLOExitReason:
>> +#
>> +# The reason for a COLO exit
>> +#
>> +# @none: no failover has ever happened, This can't occur in the COLO_EXIT event,
>
> s/happened,/happened./

While there, wrap the line around column 70, please.

>> +# only in the result of query-colo-status.
>> +#
>> +# @request: COLO exit is due to an external request
>> +#
>> +# @error: COLO exit is due to an internal error
>> +#
>> +# Since: 2.13
>
> s/2.13/3.0/
>
>> +##
>> +{ 'enum': 'COLOExitReason',
>> +  'data': [ 'none', 'request', 'error' ] }
>> +
>>   ##
>>   # @x-colo-lost-heartbeat:
>>   #
>>

With these touch-ups:
Reviewed-by: Markus Armbruster <armbru@redhat.com>