From cbff9112647213bf4376a0c78032d15585a3b5b6 Mon Sep 17 00:00:00 2001 From: Mohsin Kazmi Date: Thu, 17 Jun 2021 14:57:01 +0200 Subject: [PATCH] net: fix Intel-specific Prepare the outer IPv4 hdr for checksum Preparation of the headers for the hardware offload misses the outer IPv4 checksum offload. It results in bad checksum computed by hardware NIC. This patch fixes the issue by setting the outer IPv4 checksum field to 0. Fixes: 4fb7e803eb1a ("ethdev: add Tx preparation") Cc: stable@dpdk.org Signed-off-by: Mohsin Kazmi Acked-by: Qi Zhang Acked-by: Olivier Matz --- lib/net/rte_net.h | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/lib/net/rte_net.h b/lib/net/rte_net.h index 434435ffa2..42639bc154 100644 --- a/lib/net/rte_net.h +++ b/lib/net/rte_net.h @@ -125,11 +125,22 @@ rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags) * Mainly it is required to avoid fragmented headers check if * no offloads are requested. */ - if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG))) + if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG | + PKT_TX_OUTER_IP_CKSUM))) return 0; - if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6)) + if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6)) { inner_l3_offset += m->outer_l2_len + m->outer_l3_len; + /* + * prepare outer IPv4 header checksum by setting it to 0, + * in order to be computed by hardware NICs. + */ + if (ol_flags & PKT_TX_OUTER_IP_CKSUM) { + ipv4_hdr = rte_pktmbuf_mtod_offset(m, + struct rte_ipv4_hdr *, m->outer_l2_len); + ipv4_hdr->hdr_checksum = 0; + } + } /* * Check if headers are fragmented. -- 2.17.1