[dpdk-dev] [PATCH] net: prepare the outer ipv4 hdr for checksum
From: Mohsin Kazmi <hidden>
Date: 2021-06-24 15:16:57
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
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. Cc: ray.kinsella@intel.com Signed-off-by: Mohsin Kazmi <redacted> --- 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..48093830a0 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