netdev - Re: [PATCH net-next 10/14] bridge: mcast: Allow user space to add (*, G) with a source list and filter mode

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Date:   Fri, 9 Dec 2022 09:52:24 +0200
From:   Nikolay Aleksandrov <razor@...ckwall.org>
To:     Ido Schimmel <idosch@...dia.com>, netdev@...r.kernel.org,
        bridge@...ts.linux-foundation.org
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, roopa@...dia.com, mlxsw@...dia.com
Subject: Re: [PATCH net-next 10/14] bridge: mcast: Allow user space to add (*,
 G) with a source list and filter mode

On 08/12/2022 17:28, Ido Schimmel wrote:
> Add new netlink attributes to the RTM_NEWMDB request that allow user
> space to add (*, G) with a source list and filter mode.
> 
> The RTM_NEWMDB message can already dump such entries (created by the
> kernel) so there is no need to add dump support. However, the message
> contains a different set of attributes depending if it is a request or a
> response. The naming and structure of the new attributes try to follow
> the existing ones used in the response.
> 
> Request:
> 
> [ struct nlmsghdr ]
> [ struct br_port_msg ]
> [ MDBA_SET_ENTRY ]
> 	struct br_mdb_entry
> [ MDBA_SET_ENTRY_ATTRS ]
> 	[ MDBE_ATTR_SOURCE ]
> 		struct in_addr / struct in6_addr
> 	[ MDBE_ATTR_SRC_LIST ]		// new
> 		[ MDBE_SRC_LIST_ENTRY ]
> 			[ MDBE_SRCATTR_ADDRESS ]
> 				struct in_addr / struct in6_addr
> 		[ ...]
> 	[ MDBE_ATTR_GROUP_MODE ]	// new
> 		u8
> 
> Response:
> 
> [ struct nlmsghdr ]
> [ struct br_port_msg ]
> [ MDBA_MDB ]
> 	[ MDBA_MDB_ENTRY ]
> 		[ MDBA_MDB_ENTRY_INFO ]
> 			struct br_mdb_entry
> 		[ MDBA_MDB_EATTR_TIMER ]
> 			u32
> 		[ MDBA_MDB_EATTR_SOURCE ]
> 			struct in_addr / struct in6_addr
> 		[ MDBA_MDB_EATTR_RTPROT ]
> 			u8
> 		[ MDBA_MDB_EATTR_SRC_LIST ]
> 			[ MDBA_MDB_SRCLIST_ENTRY ]
> 				[ MDBA_MDB_SRCATTR_ADDRESS ]
> 					struct in_addr / struct in6_addr
> 				[ MDBA_MDB_SRCATTR_TIMER ]
> 					u8
> 			[...]
> 		[ MDBA_MDB_EATTR_GROUP_MODE ]
> 			u8
> 
> Signed-off-by: Ido Schimmel <idosch@...dia.com>
> ---
> 
> Notes:
>     v1:
>     * Use an array instead of list to store source entries.
>     * Drop br_mdb_config_attrs_fini().
> 
>  include/uapi/linux/if_bridge.h |  20 +++++
>  net/bridge/br_mdb.c            | 130 +++++++++++++++++++++++++++++++++
>  2 files changed, 150 insertions(+)
> 

Acked-by: Nikolay Aleksandrov <razor@...ckwall.org>