From: Jiri Pirko <jiri@mellanox.com>
Date: Sat, 27 Jul 2019 20:32:55 +0300
Subject: mlxsw: spectrum_flower: Forbid to offload mirred redirect on egress
Patch-mainline: v5.4-rc1
Git-commit: 185556f092491120ea2bd7eab6f9f78ff6c4d6d0
References: bsc#1154488

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@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c |    5 +++++
 1 file changed, 5 insertions(+)

--- 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_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,