[PATCH AUTOSEL 5.4 189/350] net/mlx5e: Verify that rule has at least one fwd/drop action

Sasha Levin
2019-12-10T21:10:51Z

From: Vlad Buslov <vladbu@mellanox.com>

[ Upstream commit ae2741e2b6ce2bf1b656b1152c4ef147ff35b096 ]

Currently, mlx5 tc layer doesn't verify that rule has at least one forward
or drop action which leads to following firmware syndrome when user tries
to offload such action:

[ 1824.860501] mlx5_core 0000:81:00.0: mlx5_cmd_check:753:(pid 29458): SET_FLOW_TABLE_ENTRY(0x936) op_mod(0x0) failed, status bad parameter(0x3), syndrome (0x144b7a)

Add check at the end of parse_tc_fdb_actions() that verifies that resulting
attribute has action fwd or drop flag set.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index f90a9f8e0fc6a..1e8bffebc4cff 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -3443,6 +3443,12 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
}

+ if (!(attr->action &
+ (MLX5_FLOW_CONTEXT_ACTION_FWD_DEST | MLX5_FLOW_CONTEXT_ACTION_DROP))) {
+ NL_SET_ERR_MSG(extack, "Rule must have at least one forward/drop action");
+ return -EOPNOTSUPP;
+ }
+
if (attr->split_count > 0 && !mlx5_esw_has_fwd_fdb(priv->mdev)) {
NL_SET_ERR_MSG_MOD(extack,
"current firmware doesn't support split rule for port mirroring");
--
2.20.1