[dpdk-dev] [PATCH] net/mlx5: fix flow split combined with age action

[Dekel Peled]

Currently, for a flow containing an age action, if flow is split to
sub-flows, a new age action will be created for each sub-flow.
However only the action created for the last sub-flow will be queried
on flow query and cleared on flow removal.

This behavior is wrong, causing a leak of resources.
Need to create just one action per flow, and use it for all sub-flows.

This patch adds the required check to make sure an age action is
created just once per flow, and used by all sub-flows.

Fixes: f935ed4b645a ("net/mlx5: support flow hit action for aging")
Cc: stable at dpdk.org

Signed-off-by: Dekel Peled <dekelp at nvidia.com>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 860ef9aa01..11adc138f8 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -10077,14 +10077,22 @@ flow_dv_translate(struct rte_eth_dev *dev,
 			break;
 		case RTE_FLOW_ACTION_TYPE_AGE:
 			if (priv->sh->flow_hit_aso_en && attr->group) {
-				flow->age = flow_dv_translate_create_aso_age
-						(dev, action->conf, error);
-				if (!flow->age)
-					return rte_flow_error_set
+				/*
+				 * Create one shared age action, to be used
+				 * by all sub-flows.
+				 */
+				if (!flow->age) {
+					flow->age =
+						flow_dv_translate_create_aso_age
+							(dev, action->conf,
+							 error);
+					if (!flow->age)
+						return rte_flow_error_set
 						(error, rte_errno,
 						 RTE_FLOW_ERROR_TYPE_ACTION,
 						 NULL,
 						 "can't create ASO age action");
+				}
 				dev_flow->dv.actions[actions_n++] =
 					  (flow_aso_age_get_by_idx
 						(dev, flow->age))->dr_action;
-- 
2.25.1