netdev - Re: [PATCH net-next 5/8] bridge: Add SWITCHDEV_FDB_FLUSH_TO

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Date:   Tue, 15 Sep 2020 07:20:14 +0000
From:   Nikolay Aleksandrov <nikolay@...dia.com>
To:     "davem@...emloft.net" <davem@...emloft.net>,
        "jwi@...ux.ibm.com" <jwi@...ux.ibm.com>,
        "kuba@...nel.org" <kuba@...nel.org>
CC:     "kgraul@...ux.ibm.com" <kgraul@...ux.ibm.com>,
        "hca@...ux.ibm.com" <hca@...ux.ibm.com>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        "wintera@...ux.ibm.com" <wintera@...ux.ibm.com>,
        "ubraun@...ux.ibm.com" <ubraun@...ux.ibm.com>,
        "jiri@...nulli.us" <jiri@...nulli.us>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Roopa Prabhu <roopa@...dia.com>,
        "ivecera@...hat.com" <ivecera@...hat.com>
Subject: Re: [PATCH net-next 5/8] bridge: Add SWITCHDEV_FDB_FLUSH_TO_BRIDGE
 notifier

On Thu, 2020-09-10 at 19:23 +0200, Julian Wiedmann wrote:
> From: Alexandra Winter <wintera@...ux.ibm.com>
> 
> so the switchdev can notifiy the bridge to flush non-permanent fdb entries
> for this port. This is useful whenever the hardware fdb of the switchdev
> is reset, but the netdev and the bridgeport are not deleted.
> 
> Note that this has the same effect as the IFLA_BRPORT_FLUSH attribute.
> 
> CC: Jiri Pirko <jiri@...nulli.us>
> CC: Ivan Vecera <ivecera@...hat.com>
> CC: Roopa Prabhu <roopa@...dia.com>
> CC: Nikolay Aleksandrov <nikolay@...dia.com>
> Signed-off-by: Alexandra Winter <wintera@...ux.ibm.com>
> Signed-off-by: Julian Wiedmann <jwi@...ux.ibm.com>
> ---
>  include/net/switchdev.h | 1 +
>  net/bridge/br.c         | 5 +++++
>  2 files changed, 6 insertions(+)
> 
> diff --git a/include/net/switchdev.h b/include/net/switchdev.h
> index ff2246914301..53e8b4994296 100644
> --- a/include/net/switchdev.h
> +++ b/include/net/switchdev.h
> @@ -203,6 +203,7 @@ enum switchdev_notifier_type {
>  	SWITCHDEV_FDB_ADD_TO_DEVICE,
>  	SWITCHDEV_FDB_DEL_TO_DEVICE,
>  	SWITCHDEV_FDB_OFFLOADED,
> +	SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
>  
>  	SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */
>  	SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */
> diff --git a/net/bridge/br.c b/net/bridge/br.c
> index b6fe30e3768f..401eeb9142eb 100644
> --- a/net/bridge/br.c
> +++ b/net/bridge/br.c
> @@ -183,6 +183,11 @@ static int br_switchdev_event(struct notifier_block *unused,
>  		br_fdb_offloaded_set(br, p, fdb_info->addr,
>  				     fdb_info->vid, fdb_info->offloaded);
>  		break;
> +	case SWITCHDEV_FDB_FLUSH_TO_BRIDGE:
> +		fdb_info = ptr;
> +		/* Don't delete static entries */
> +		br_fdb_delete_by_port(br, p, fdb_info->vid, 0);
> +		break;
>  	}
>  
>  out:

Acked-by: Nikolay Aleksandrov <nikolay@...dia.com>