From mboxrd@z Thu Jan 1 00:00:00 1970 From: Didier Pallard Subject: [PATCH] net: fix Intel prepare function for IP checksum offload Date: Wed, 19 Sep 2018 16:42:08 +0200 Message-ID: <20180919144208.17064-1-didier.pallard@6wind.com> Cc: stable@dpdk.org To: dev@dpdk.org Return-path: Received: from mail-wm1-f68.google.com (mail-wm1-f68.google.com [209.85.128.68]) by dpdk.org (Postfix) with ESMTP id 150601B53 for ; Wed, 19 Sep 2018 16:42:31 +0200 (CEST) Received: by mail-wm1-f68.google.com with SMTP id q8-v6so7298227wmq.4 for ; Wed, 19 Sep 2018 07:42:31 -0700 (PDT) List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Current Intel tx prepare function does not properly handle the case where only IP checksum is requested, without requesting any L4 checksum or TSO: IP checksum is not properly reset to 0 and output packet may contain invalid IP checksum. Fixes: 4fb7e803eb1a ("ethdev: add Tx preparation") Cc: stable@dpdk.org Signed-off-by: Didier Pallard --- lib/librte_net/rte_net.h | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) diff --git a/lib/librte_net/rte_net.h b/lib/librte_net/rte_net.h index b6ab6e1d57b2..e59760a0a108 100644 --- a/lib/librte_net/rte_net.h +++ b/lib/librte_net/rte_net.h @@ -122,14 +122,16 @@ rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags) (ol_flags & PKT_TX_OUTER_IPV6)) inner_l3_offset += m->outer_l2_len + m->outer_l3_len; - if ((ol_flags & PKT_TX_UDP_CKSUM) == PKT_TX_UDP_CKSUM) { - if (ol_flags & PKT_TX_IPV4) { - ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *, - inner_l3_offset); + if (ol_flags & PKT_TX_IPV4) { + ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *, + inner_l3_offset); - if (ol_flags & PKT_TX_IP_CKSUM) - ipv4_hdr->hdr_checksum = 0; + if (ol_flags & PKT_TX_IP_CKSUM) + ipv4_hdr->hdr_checksum = 0; + } + if ((ol_flags & PKT_TX_UDP_CKSUM) == PKT_TX_UDP_CKSUM) { + if (ol_flags & PKT_TX_IPV4) { udp_hdr = (struct udp_hdr *)((char *)ipv4_hdr + m->l3_len); udp_hdr->dgram_cksum = rte_ipv4_phdr_cksum(ipv4_hdr, @@ -146,12 +148,6 @@ rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags) } else if ((ol_flags & PKT_TX_TCP_CKSUM) || (ol_flags & PKT_TX_TCP_SEG)) { if (ol_flags & PKT_TX_IPV4) { - ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *, - inner_l3_offset); - - if (ol_flags & PKT_TX_IP_CKSUM) - ipv4_hdr->hdr_checksum = 0; - /* non-TSO tcp or TSO */ tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + m->l3_len); -- 2.11.0