Re: [PATCH v4 6/8] tap: cpr support

[Markus Armbruster <armbru@redhat.com>]

Ben Chaney <bchaney@akamai.com> writes:

> Provide the cpr=on option to preserve TAP and vhost descriptors during
> cpr-transfer, so the management layer does not need to create a new
> device for the target.
>
> Save all tap fd's in order with the tap device fds saved first,
> and the vhostfd saved after.
>
> Example:
>
> -netdev tap,id=hostnet2,cpr=on
>
> Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
> Signed-off-by: Ben Chaney <bchaney@akamai.com>

[...]

> diff --git a/qapi/net.json b/qapi/net.json
> index 118bd34965..4b12fca94b 100644
> --- a/qapi/net.json
> +++ b/qapi/net.json
> @@ -355,6 +355,9 @@
>  # @poll-us: maximum number of microseconds that could be spent on busy
>  #     polling for tap (since 2.7)
>  #
> +# @cpr: preserve the state of this device and its associated file
> +#     descriptors during cpr-transfer for reduced migration downtime

(default: false) (since 11.0)

> +#
>  # Since: 1.2
>  ##
>  { 'struct': 'NetdevTapOptions',
> @@ -373,7 +376,8 @@
>      '*vhostfds':   'str',
>      '*vhostforce': 'bool',
>      '*queues':     'uint32',
> -    '*poll-us':    'uint32'} }
> +    '*poll-us':    'uint32',
> +    '*cpr':        'bool'} }
>  
>  ##
>  # @NetdevSocketOptions:

With that, QAPI schema
Acked-by: Markus Armbruster <armbru@redhat.com>