netdev - Re: [patch net-next v2 01/12] fib: notifier: Add VIF add and delete event types

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Date:   Mon, 25 Sep 2017 12:20:54 +0300
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, yotamg@...lanox.com, idosch@...lanox.com,
        mlxsw@...lanox.com, andrew@...n.ch
Subject: Re: [patch net-next v2 01/12] fib: notifier: Add VIF add and delete
 event types

On 24/09/17 20:22, Jiri Pirko wrote:
> From: Yotam Gigi <yotamg@...lanox.com>
> 
> In order for an interface to forward packets according to the kernel
> multicast routing table, it must be configured with a VIF index according
> to the mroute user API. The VIF index is then used to refer to that
> interface in the mroute user API, for example, to set the iif and oifs of
> an MFC entry.
> 
> In order to allow drivers to be aware and offload multicast routes, they
> have to be aware of the VIF add and delete notifications.
> 
> Due to the fact that a specific VIF can be deleted and re-added pointing to
> another netdevice, and the MFC routes that point to it will forward the
> matching packets to the new netdevice, a driver willing to offload MFC
> cache entries must be aware of the VIF add and delete events in addition to
> MFC routes notifications.
> 
> Signed-off-by: Yotam Gigi <yotamg@...lanox.com>
> Reviewed-by: Ido Schimmel <idosch@...lanox.com>
> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
> ---
>  include/net/fib_notifier.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/net/fib_notifier.h b/include/net/fib_notifier.h
> index 669b971..54cd6b8 100644
> --- a/include/net/fib_notifier.h
> +++ b/include/net/fib_notifier.h
> @@ -20,6 +20,8 @@ enum fib_event_type {
>  	FIB_EVENT_RULE_DEL,
>  	FIB_EVENT_NH_ADD,
>  	FIB_EVENT_NH_DEL,
> +	FIB_EVENT_VIF_ADD,
> +	FIB_EVENT_VIF_DEL,
>  };
>  
>  struct fib_notifier_ops {
> 

Reviewed-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>