netdev - Re: [PATCH net-next v2 2/2] mlxsw: spectrum_router: Return an error for routes added after abort

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Date:   Wed, 2 May 2018 09:28:10 -0600
From:   David Ahern <dsahern@...il.com>
To:     Ido Schimmel <idosch@...lanox.com>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, jiri@...lanox.com, mlxsw@...lanox.com
Subject: Re: [PATCH net-next v2 2/2] mlxsw: spectrum_router: Return an error
 for routes added after abort

On 5/2/18 1:17 AM, Ido Schimmel wrote:
> We currently do not perform accounting in the driver and thus can't
> reject routes before resources are exceeded.
> 
> However, in order to make users aware of the fact that routes are no
> longer offloaded we can return an error for routes configured after the
> abort mechanism was triggered.
> 
> Signed-off-by: Ido Schimmel <idosch@...lanox.com>
> ---
>  drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> index added380e344..8028d221aece 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> @@ -5928,6 +5928,13 @@ static int mlxsw_sp_router_fib_event(struct notifier_block *nb,
>  						     router->mlxsw_sp);
>  		if (!err || info->extack)
>  			return notifier_from_errno(err);
> +		break;
> +	case FIB_EVENT_ENTRY_ADD:
> +		if (router->aborted) {
> +			NL_SET_ERR_MSG_MOD(info->extack, "FIB offload was aborted. Not configuring route");
> +			return notifier_from_errno(-EINVAL);
> +		}
> +		break;
>  	}
>  
>  	fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
> 

Reasonable next step.

Acked-by: David Ahern <dsahern@...il.com>