patches for DPDK stable branches
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From: Mohsin Kazmi <mohsin.kazmi14@gmail.com>
To: dev@dpdk.org
Cc: ray.kinsella@intel.com, Mohsin Kazmi <mohsin.kazmi14@gmail.com>,
	stable@dpdk.org, Olivier Matz <olivier.matz@6wind.com>,
	Konstantin Ananyev <konstantin.ananyev@intel.com>,
	Thomas Monjalon <thomas.monjalon@6wind.com>,
	Tomasz Kulasek <tomaszx.kulasek@intel.com>
Subject: [dpdk-stable] [PATCH] net: prepare the outer ipv4 hdr for checksum
Date: Tue, 29 Jun 2021 19:06:58 +0200
Message-ID: <20210629170658.19452-1-mohsin.kazmi14@gmail.com> (raw)

Preparation 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 <mohsin.kazmi14@gmail.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
---
 lib/net/rte_net.h | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/net/rte_net.h b/lib/net/rte_net.h
index 434435ffa2..e47365099e 100644
--- a/lib/net/rte_net.h
+++ b/lib/net/rte_net.h
@@ -128,8 +128,18 @@ rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags)
 	if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG)))
 		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


             reply	other threads:[~2021-06-29 17:09 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-29 17:06 Mohsin Kazmi [this message]
2021-06-29 17:24 ` Kinsella, Ray

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