netdev - Re: [patch net-next 6/8] mlxsw: spectrum_dpipe: Add support for IPv6 host table dump

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Date:   Wed, 30 Aug 2017 11:42:36 -0600
From:   David Ahern <dsahern@...il.com>
To:     Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, arkadis@...lanox.com, idosch@...lanox.com,
        mlxsw@...lanox.com
Subject: Re: [patch net-next 6/8] mlxsw: spectrum_dpipe: Add support for IPv6
 host table dump

On 8/30/17 6:03 AM, Jiri Pirko wrote:
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c
> index 5924e97..75da2ef 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c
> +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c
> @@ -386,8 +386,19 @@ mlxsw_sp_dpipe_table_host_match_action_prepare(struct devlink_dpipe_match *match
>  
>  	match = &matches[MLXSW_SP_DPIPE_TABLE_HOST_MATCH_DIP];
>  	match->type = DEVLINK_DPIPE_MATCH_TYPE_FIELD_EXACT;
> -	match->header = &devlink_dpipe_header_ipv4;
> -	match->field_id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP;
> +	switch (type) {
> +	case AF_INET:
> +		match->header = &devlink_dpipe_header_ipv4;
> +		match->field_id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP;
> +		break;
> +	case AF_INET6:
> +		match->header = &devlink_dpipe_header_ipv6;
> +		match->field_id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP;
> +		break;
> +	default:
> +		WARN_ON(1);

Here as well.

> +		return;
> +	}
>  
>  	action->type = DEVLINK_DPIPE_ACTION_TYPE_FIELD_MODIFY;
>  	action->header = &devlink_dpipe_header_ethernet;
> @@ -424,7 +435,18 @@ mlxsw_sp_dpipe_table_host_entry_prepare(struct devlink_dpipe_entry *entry,
>  	match_value = &match_values[MLXSW_SP_DPIPE_TABLE_HOST_MATCH_DIP];
>  
>  	match_value->match = match;
> -	match_value->value_size = sizeof(u32);
> +	switch (type) {
> +	case AF_INET:
> +		match_value->value_size = sizeof(u32);
> +		break;
> +	case AF_INET6:
> +		match_value->value_size = sizeof(struct in6_addr);
> +		break;
> +	default:
> +		WARN_ON(1);

And here. WARN_ON is overkill

> +		return -EINVAL;
> +	}
> +
>  	match_value->value = kmalloc(match_value->value_size, GFP_KERNEL);
>  	if (!match_value->value)
>  		return -ENOMEM;