netdev - [PATCH net-next 1/3] mlxsw: spectrum_flower: Forbid to offload mirred redirect on egress

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Message-Id: <20190727173257.6848-2-idosch@idosch.org>
Date:   Sat, 27 Jul 2019 20:32:55 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, jiri@...lanox.com, mlxsw@...lanox.com,
        Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 1/3] mlxsw: spectrum_flower: Forbid to offload mirred redirect on egress

From: Jiri Pirko <jiri@...lanox.com>

Spectrum ASIC does not support redirection on egress, so refuse to
insert such flows:

$ tc qdisc add dev ens16np1 clsact
$ tc filter add dev ens16np1 egress protocol all pref 1 handle 101 flower skip_sw action mirred egress redirect dev ens16np2
Error: mlxsw_spectrum: Redirect action is not supported on egress.

Signed-off-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
index 202e9a246019..1eeac8a36ead 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
@@ -78,6 +78,11 @@ static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
 			struct mlxsw_sp_fid *fid;
 			u16 fid_index;
 
+			if (mlxsw_sp_acl_block_is_egress_bound(block)) {
+				NL_SET_ERR_MSG_MOD(extack, "Redirect action is not supported on egress");
+				return -EOPNOTSUPP;
+			}
+
 			fid = mlxsw_sp_acl_dummy_fid(mlxsw_sp);
 			fid_index = mlxsw_sp_fid_index(fid);
 			err = mlxsw_sp_acl_rulei_act_fid_set(mlxsw_sp, rulei,
-- 
2.21.0