From: Jiri Pirko <jiri@mellanox.com>
Date: Sat, 9 May 2020 23:06:02 +0300
Subject: mlxsw: spectrum_matchall: Restrict sample action to be allowed only
 on ingress
Patch-mainline: v5.8-rc1
Git-commit: 18aa23b31f6c8e3f4b01b70a8a4eab873e2eb710
References: bsc#1176774

HW supports packet sampling on ingress only. Check and fail if user
is adding sample on egress.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
@@ -212,6 +212,11 @@ int mlxsw_sp_mall_replace(struct mlxsw_s
 		mall_entry->mirror.to_dev = act->dev;
 	} else if (act->id == FLOW_ACTION_SAMPLE &&
 		   protocol == htons(ETH_P_ALL)) {
+		if (!mall_entry->ingress) {
+			NL_SET_ERR_MSG(f->common.extack, "Sample is not supported on egress");
+			err = -EOPNOTSUPP;
+			goto errout;
+		}
 		if (act->sample.rate > MLXSW_REG_MPSC_RATE_MAX) {
 			NL_SET_ERR_MSG(f->common.extack, "Sample rate not supported");
 			err = -EOPNOTSUPP;