Re: [PATCH V8 1/6] qapi/net: Add IPFlowSpec and QMP command for COLO passthrough

[Lukas Straub]

On Tue, 15 Jun 2021 19:37:35 +0800
Zhang Chen <chen.zhang@intel.com> wrote:

> Since the real user scenario does not need COLO to monitor all traffic.
> Add colo-passthrough-add and colo-passthrough-del to maintain
> a COLO network passthrough list. Add IPFlowSpec struct for all QMP commands.
> All the fields of IPFlowSpec are optional.
> 
> Signed-off-by: Zhang Chen <chen.zhang@intel.com>
> ---
>  net/net.c     | 10 +++++++
>  qapi/net.json | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 84 insertions(+)
> 
> diff --git a/net/net.c b/net/net.c
> index 76bbb7c31b..f913e97983 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -1195,6 +1195,16 @@ void qmp_netdev_del(const char *id, Error **errp)
>      }
>  }
>  
> +void qmp_colo_passthrough_add(IPFlowSpec *spec, Error **errp)
> +{
> +    /* TODO implement setup passthrough rule */
> +}
> +
> +void qmp_colo_passthrough_del(IPFlowSpec *spec, Error **errp)
> +{
> +    /* TODO implement delete passthrough rule */
> +}
> +
>  static void netfilter_print_info(Monitor *mon, NetFilterState *nf)
>  {
>      char *str;
> diff --git a/qapi/net.json b/qapi/net.json
> index 7fab2e7cd8..91f2e1495a 100644
> --- a/qapi/net.json
> +++ b/qapi/net.json
> @@ -7,6 +7,7 @@
>  ##
>  
>  { 'include': 'common.json' }
> +{ 'include': 'sockets.json' }
>  
>  ##
>  # @set_link:
> @@ -696,3 +697,76 @@
>  ##
>  { 'event': 'FAILOVER_NEGOTIATED',
>    'data': {'device-id': 'str'} }
> +
> +##
> +# @IPFlowSpec:
> +#
> +# IP flow specification.
> +#
> +# @protocol: Transport layer protocol like TCP/UDP, etc. The protocol is the
> +#            string instead of enum, because it can be passed to 
> getprotobyname(3)
> +#            and avoid duplication with /etc/protocols.
> +#
> +# @object-name: The @object-name means packet handler in Qemu. Because not
> +#               all the network packet must pass the colo-compare module,
> +#               the net-filters are same situation. There modules attach to
> +#               netdev or chardev to work, VM can run multiple modules
> +#               at the same time. So it needs the object-name to set
> +#               the effective module.

Again: "@object-name: The id of the colo-compare object to add the filter to."

> +# @source: Source address and port.
> +#
> +# @destination: Destination address and port.
> +#
> +# Since: 6.1
> +##
> +{ 'struct': 'IPFlowSpec',
> +  'data': { '*protocol': 'str', '*object-name': 'str',
> +    '*source': 'InetSocketAddressBase',
> +    '*destination': 'InetSocketAddressBase' } }
> +
> +##
> +# @colo-passthrough-add:
> +#
> +# Add passthrough entry IPFlowSpec to the COLO-compare instance.
> +# The protocol and source/destination IP/ports are optional. if the user
> +# only inputs part of the information, this will match all traffic.
> +#
> +# Returns: Nothing on success
> +#
> +# Since: 6.1
> +#
> +# Example:
> +#
> +# -> { "execute": "colo-passthrough-add",
> +#      "arguments": { "protocol": "tcp", "object-name": "object0",
> +#      "source": {"host": "192.168.1.1", "port": "1234"},
> +#      "destination": {"host": "192.168.1.2", "port": "4321"} } }
> +# <- { "return": {} }
> +#
> +##
> +{ 'command': 'colo-passthrough-add', 'boxed': true,
> +     'data': 'IPFlowSpec' }
> +
> +##
> +# @colo-passthrough-del:
> +#
> +# Delete passthrough entry IPFlowSpec to the COLO-compare instance.
> +# The protocol and source/destination IP/ports are optional. if the user
> +# only inputs part of the information, this will match all traffic.
> +#
> +# Returns: Nothing on success
> +#
> +# Since: 6.1
> +#
> +# Example:
> +#
> +# -> { "execute": "colo-passthrough-del",
> +#      "arguments": { "protocol": "tcp", "object-name": "object0",
> +#      "source": {"host": "192.168.1.1", "port": "1234"},
> +#      "destination": {"host": "192.168.1.2", "port": "4321"} } }
> +# <- { "return": {} }
> +#
> +##
> +{ 'command': 'colo-passthrough-del', 'boxed': true,
> +     'data': 'IPFlowSpec' }



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