1 From cbff9112647213bf4376a0c78032d15585a3b5b6 Mon Sep 17 00:00:00 2001
2 From: Mohsin Kazmi <mohsin.kazmi14@gmail.com>
3 Date: Thu, 17 Jun 2021 14:57:01 +0200
4 Subject: [PATCH] net: fix Intel-specific Prepare the outer IPv4 hdr for
7 Preparation of the headers for the hardware offload
8 misses the outer IPv4 checksum offload.
9 It results in bad checksum computed by hardware NIC.
11 This patch fixes the issue by setting the outer IPv4
14 Fixes: 4fb7e803eb1a ("ethdev: add Tx preparation")
17 Signed-off-by: Mohsin Kazmi <mohsin.kazmi14@gmail.com>
18 Acked-by: Qi Zhang <qi.z.zhang@intel.com>
19 Acked-by: Olivier Matz <olivier.matz@6wind.com>
21 lib/net/rte_net.h | 15 +++++++++++++--
22 1 file changed, 13 insertions(+), 2 deletions(-)
24 diff --git a/lib/net/rte_net.h b/lib/net/rte_net.h
25 index 434435ffa2..42639bc154 100644
26 --- a/lib/net/rte_net.h
27 +++ b/lib/net/rte_net.h
28 @@ -125,11 +125,22 @@ rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags)
29 * Mainly it is required to avoid fragmented headers check if
30 * no offloads are requested.
32 - if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG)))
33 + if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG |
34 + PKT_TX_OUTER_IP_CKSUM)))
37 - if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6))
38 + if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6)) {
39 inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
41 + * prepare outer IPv4 header checksum by setting it to 0,
42 + * in order to be computed by hardware NICs.
44 + if (ol_flags & PKT_TX_OUTER_IP_CKSUM) {
45 + ipv4_hdr = rte_pktmbuf_mtod_offset(m,
46 + struct rte_ipv4_hdr *, m->outer_l2_len);
47 + ipv4_hdr->hdr_checksum = 0;
52 * Check if headers are fragmented.