Re: [PATCH V4 3/7] qapi/net: Add new QMP command for COLO passthrough

[Markus Armbruster <armbru@redhat.com>]

Zhang Chen <chen.zhang@intel.com> writes:

> 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.
>
> Signed-off-by: Zhang Chen <chen.zhang@intel.com>
> ---
>  net/net.c     | 10 ++++++++++
>  qapi/net.json | 40 ++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 50 insertions(+)
>
> diff --git a/net/net.c b/net/net.c
> index 725a4e1450..7c7cefe0e0 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -1199,6 +1199,16 @@ void qmp_netdev_del(const char *id, Error **errp)
>      }
>  }
>  
> +void qmp_colo_passthrough_add(L4_Connection *conn, Error **errp)
> +{
> +    /* Setup passthrough connection */
> +}
> +
> +void qmp_colo_passthrough_del(L4_Connection *conn, Error **errp)
> +{
> +    /* Delete passthrough connection */
> +}
> +
>  static void netfilter_print_info(Monitor *mon, NetFilterState *nf)
>  {
>      char *str;
> diff --git a/qapi/net.json b/qapi/net.json
> index cd4a8ed95e..ec7d3b1128 100644
> --- a/qapi/net.json
> +++ b/qapi/net.json
> @@ -851,3 +851,43 @@
>    'data': { 'protocol': 'IP_PROTOCOL', '*id': 'str', '*src_ip': 'str', '*dst_ip': 'str',
>      '*src_port': 'int', '*dst_port': 'int' } }
>  
> +##
> +# @colo-passthrough-add:
> +#
> +# Add passthrough entry according to customer's needs in COLO-compare.
> +#
> +# Returns: Nothing on success
> +#
> +# Since: 6.1
> +#
> +# Example:
> +#
> +# -> { "execute": "colo-passthrough-add",
> +#      "arguments": { "protocol": "tcp", "id": "object0", "src_ip": "192.168.1.1",
> +#      "dst_ip": "192.168.1.2", "src_port": 1234, "dst_port": 4321 } }
> +# <- { "return": {} }
> +#
> +##
> +{ 'command': 'colo-passthrough-add', 'boxed': true,
> +     'data': 'L4_Connection' }
> +
> +##
> +# @colo-passthrough-del:
> +#
> +# Delete passthrough entry according to customer's needs in COLO-compare.
> +#
> +# Returns: Nothing on success
> +#
> +# Since: 6.1
> +#
> +# Example:
> +#
> +# -> { "execute": "colo-passthrough-del",
> +#      "arguments": { "protocol": "tcp", "id": "object0", "src_ip": "192.168.1.1",
> +#      "dst_ip": "192.168.1.2", "src_port": 1234, "dst_port": 4321 } }
> +# <- { "return": {} }
> +#
> +##
> +{ 'command': 'colo-passthrough-del', 'boxed': true,
> +     'data': 'L4_Connection' }
> +

Now let's look at colo-passthrough-del.  I figure it is for deleting the
kind of things colo-passthrough-add adds.

What exactly is deleted?  The thing created with the exact same
arguments?

This would be unusual.  Commonly, FOO-add and FOO-del both take a string
ID argument.  The FOO created by FOO-add remembers its ID, and FOO-del
deletes by ID.