[dpdk-dev] [PATCH v2] net/ena: fix false indication of bad L4 Rx csums

[Michal Krawczyk]

From: Igor Chauskin <igo...@amazon.com>

Add checking of l4_csum_checked and frag flags before checking the
l4_csum_error flag.
In case of IP fragment/unchecked L4 csum - add PKT_RX_L4_CKSUM_UNKNOWN
flag to the indicated mbuf.

Fixes: 1173fca25af9 ("ena: add polling-mode driver")
Cc: sta...@dpdk.org

Signed-off-by: Igor Chauskin <igo...@amazon.com>
Reviewed-by: Maciej Bielski <m...@semihalf.com>
Reviewed-by: Michal Krawczyk <m...@semihalf.com>
---
v2:
* Update ENA PMD version to the v2.0.2

 drivers/net/ena/ena_ethdev.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index aa84fabc5..8bbd80dfb 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -27,7 +27,7 @@
 
 #define DRV_MODULE_VER_MAJOR   2
 #define DRV_MODULE_VER_MINOR   0
-#define DRV_MODULE_VER_SUBMINOR        1
+#define DRV_MODULE_VER_SUBMINOR        2
 
 #define ENA_IO_TXQ_IDX(q)      (2 * (q))
 #define ENA_IO_RXQ_IDX(q)      (2 * (q) + 1)
@@ -272,8 +272,14 @@ static inline void ena_rx_mbuf_prepare(struct rte_mbuf 
*mbuf,
        else if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV6)
                packet_type |= RTE_PTYPE_L3_IPV6;
 
-       if (unlikely(ena_rx_ctx->l4_csum_err))
-               ol_flags |= PKT_RX_L4_CKSUM_BAD;
+       if (!ena_rx_ctx->l4_csum_checked)
+               ol_flags |= PKT_RX_L4_CKSUM_UNKNOWN;
+       else
+               if (unlikely(ena_rx_ctx->l4_csum_err) && !ena_rx_ctx->frag)
+                       ol_flags |= PKT_RX_L4_CKSUM_BAD;
+               else
+                       ol_flags |= PKT_RX_L4_CKSUM_UNKNOWN;
+
        if (unlikely(ena_rx_ctx->l3_csum_err))
                ol_flags |= PKT_RX_IP_CKSUM_BAD;
 
-- 
2.20.1