[PATCH] net/mlx5: fix flow mark reading after reconfigure

[PATCH] net/mlx5: fix flow mark reading after reconfigure

[Dariusz Sosnowski]

mlx5 PMD supports flow mark action which attaches additional
metadata to received packets. This metadata is stored
in the rte_mbuf in hash.fdir.hi field and applications
are notified about it with RTE_MBUF_F_RX_FDIR mbuf flag.

When working with HW Steering flow engine,
mlx5 PMD reads the HW completion entry field with flow mark value
if and only if at least one template table with flow mark action
was created.
Whenever table was created mlx5 PMD updated the private
data of each Rx queue to inform
Rx burst function to read HW field.

Whenever application reconfigures any of the Rx queues
through additional call to rte_eth_rx_queue_setup(),
this private Rx queue data is reset, but information
about existence of flow mark was not restored by PMD.
As a result, reconfiguration caused applications
to not receive flow mark metadata.

This patch fixes that behavior. Whenever port is started,
PMD will check if flow mark action is used and update
relevant private Rx queue data struct.

Fixes: 1deadfd709f5 ("net/mlx5: add HW mark action")
Cc: stable@dpdk.org

Signed-off-by: Dariusz Sosnowski <dsosnowski@nvidia.com>
Acked-by: Bing Zhao <bingz@nvidia.com>
---
 drivers/net/mlx5/mlx5_flow.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 0821c93a9a..5add0c4a2b 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -1898,6 +1898,7 @@ mlx5_flow_rxq_dynf_set(struct rte_eth_dev *dev)
 				data->flow_meta_port_mask = priv->sh->dv_meta_mask;
 			}
 		}
+		data->mark = !!priv->mark_enabled;
 		data->mark_flag = mark_flag;
 	}
 }
-- 
2.47.3

Re: [PATCH] net/mlx5: fix flow mark reading after reconfigure

[Raslan Darawsheh]

Hi,


On 11/02/2026 10:12 AM, Dariusz Sosnowski wrote:
> mlx5 PMD supports flow mark action which attaches additional
> metadata to received packets. This metadata is stored
> in the rte_mbuf in hash.fdir.hi field and applications
> are notified about it with RTE_MBUF_F_RX_FDIR mbuf flag.
> 
> When working with HW Steering flow engine,
> mlx5 PMD reads the HW completion entry field with flow mark value
> if and only if at least one template table with flow mark action
> was created.
> Whenever table was created mlx5 PMD updated the private
> data of each Rx queue to inform
> Rx burst function to read HW field.
> 
> Whenever application reconfigures any of the Rx queues
> through additional call to rte_eth_rx_queue_setup(),
> this private Rx queue data is reset, but information
> about existence of flow mark was not restored by PMD.
> As a result, reconfiguration caused applications
> to not receive flow mark metadata.
> 
> This patch fixes that behavior. Whenever port is started,
> PMD will check if flow mark action is used and update
> relevant private Rx queue data struct.
> 
> Fixes: 1deadfd709f5 ("net/mlx5: add HW mark action")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Dariusz Sosnowski <dsosnowski@nvidia.com>
> Acked-by: Bing Zhao <bingz@nvidia.com>

Patch applied to next-net-mlx,

Kindest regards
Raslan Darawsheh