netdev - Re: [PATCH net-next 7/8] net/mlx5e: Support offload cls

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Date:	Tue, 1 Mar 2016 15:55:48 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Amir Vadai <amir@...ai.me>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Or Gerlitz <ogerlitz@...lanox.com>,
	John Fastabend <john.r.fastabend@...el.com>,
	Saeed Mahameed <saeedm@...lanox.com>,
	Hadar Har-Zion <hadarh@...lanox.com>,
	Jiri Pirko <jiri@...lanox.com>
Subject: Re: [PATCH net-next 7/8] net/mlx5e: Support offload cls_flower with
 drop action

Tue, Mar 01, 2016 at 03:24:49PM CET, amir@...ai.me wrote:
>Parse tc_cls_flower_offload into device specific commands and program
>the hardware to classify and act accordingly.
>
>For example, to drop ICMP (ip_proto 1) packets from specific smac, dmac,
>src_ip, src_ip, arriving to interface ens9:
>
> # tc qdisc add dev ens9 ingress
>
> # tc filter add dev ens9 protocol ip parent ffff: \
>     flower ip_proto 1 \
>     dst_mac 7c:fe:90:69:81:62 src_mac 7c:fe:90:69:81:56 \
>     dst_ip 11.11.11.11 src_ip 11.11.11.12 indev ens9 \
>     action drop
>
>Signed-off-by: Amir Vadai <amir@...ai.me>
>Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
>---
> drivers/net/ethernet/mellanox/mlx5/core/en_main.c |   9 +
> drivers/net/ethernet/mellanox/mlx5/core/en_tc.c   | 287 ++++++++++++++++++++++
> drivers/net/ethernet/mellanox/mlx5/core/en_tc.h   |   5 +
> 3 files changed, 301 insertions(+)
>
>diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
>index cb02b4c..1d1da94 100644
>--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
>+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
>@@ -1889,6 +1889,15 @@ static int mlx5e_ndo_setup_tc(struct net_device *dev, u32 handle,
> 		goto mqprio;
> 
> 	switch (tc->type) {
>+	case TC_SETUP_CLSFLOWER:
>+		switch (tc->cls_flower->command) {
>+		case TC_CLSFLOWER_REPLACE:
>+			return mlx5e_configure_flower(priv, proto, tc->cls_flower);
>+		case TC_CLSFLOWER_DESTROY:
>+			return mlx5e_delete_flower(priv, tc->cls_flower);
>+		default:
>+			return -EINVAL;

No need to default case here is you change "command" to enum as I
suggested it the reply to patch 1.