[dpdk-stable] [PATCH 18.11] net/mlx5: block RSS action without Rx queue

[Dekel Peled <dekelp@mellanox.com>]

[ upstream commit 15c80155874e
  ("net/mlx5: block RSS action without Rx queue") ]

This patch modifies function mlx5_flow_validate_action_rss(), to
prevent the setting of rule with rss action, but without specifying
any queues.
For example:
flow create 0 ingress pattern end actions rss queues end / end

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
---
 drivers/net/mlx5/mlx5_flow.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index f19b27e..369689c 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -943,6 +943,10 @@ uint32_t mlx5_flow_adjust_priority(struct rte_eth_dev *dev, int32_t priority,
 					  &rss->types,
 					  "some RSS protocols are not"
 					  " supported");
+	if (!rss->queue_num)
+		return rte_flow_error_set(error, EINVAL,
+					  RTE_FLOW_ERROR_TYPE_ACTION_CONF,
+					  NULL, "No queues configured");
 	for (i = 0; i != rss->queue_num; ++i) {
 		if (!(*priv->rxqs)[rss->queue[i]])
 			return rte_flow_error_set
-- 
1.8.3.1