From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 22512A04AF; Thu, 20 Aug 2020 03:43:09 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 08F0A1C026; Thu, 20 Aug 2020 03:43:09 +0200 (CEST) Received: from mail.chinasoftinc.com (unknown [114.113.233.8]) by dpdk.org (Postfix) with ESMTP id E7A661BEC3 for ; Thu, 20 Aug 2020 03:43:05 +0200 (CEST) Received: from localhost.localdomain (65.49.108.226) by INCCAS001.ito.icss (10.168.0.60) with Microsoft SMTP Server id 14.3.487.0; Thu, 20 Aug 2020 09:43:02 +0800 From: "Wei Hu (Xavier)" To: Wenzhuo Lu , Beilei Xing , Bernard Iremonger , Yongseok Koh , Konstantin Ananyev , Pablo de Lara CC: , Date: Thu, 20 Aug 2020 09:42:03 +0800 Message-ID: <20200820014204.25035-4-huwei013@chinasoftinc.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200820014204.25035-1-huwei013@chinasoftinc.com> References: <20200818120254.72792-1-huwei013@chinasoftinc.com> <20200820014204.25035-1-huwei013@chinasoftinc.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [65.49.108.226] Subject: [dpdk-dev] [PATCH v2 3/4] app/testpmd: fix packet header in txonly mode X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From: Chengchang Tang In txonly forward mode, the packet header is fixed by the initial setting, including the packet length and checksum. So when the packets varies, this may cause a packet header error. Currently, there are two methods in txonly mode to randomly change the packets. 1. Set txsplit random and txpkts (x[,y]*), the number of segments each packets will be a random value between 1 and total number of segments determined by txpkts settings. The step as follows: a) ./testpmd -w xxx -l xx -n 4 -- -i --rxd xxxx --txd xxxx b) set fwd txonly c) set txsplit rand d) set txpkts 2048,2048,2048,2048 e) start The nb_segs of the packets sent by testpmd will be 1~4. The real packet length will be 2048, 4096, 6144 and 8192. But in fact the packet length in ip header and udp header will be fixed by 8178 and 8158. 2. Set txonly-multi-flow. the ip address will be varied to generate multiple flow. The step as follows: a) ./testpmd -w xxx -l xx -n 4 -- -i --txonly-multi-flow b) set fwd txonly c) start The ip address of each pkts will change randomly, but since the header is fixed, the checksum may be a error value. Therefore, this patch adds a function to update the packet length and check sum in the pkts header when the txsplit mode is set to rand or multi-flow is set. Fixes: 82010ef55e7c ("app/testpmd: make txonly mode generate multiple flows") Fixes: 79bec05b32b7 ("app/testpmd: add ability to split outgoing packets") Cc: stable@dpdk.org Signed-off-by: Chengchang Tang Signed-off-by: Wei Hu (Xavier) --- v1 -> v2: fix TYPO_SPELLING warning in the commit log. --- app/test-pmd/txonly.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/app/test-pmd/txonly.c b/app/test-pmd/txonly.c index 3bae367ee..ad3b0a765 100644 --- a/app/test-pmd/txonly.c +++ b/app/test-pmd/txonly.c @@ -156,6 +156,34 @@ setup_pkt_udp_ip_headers(struct rte_ipv4_hdr *ip_hdr, ip_hdr->hdr_checksum = (uint16_t) ip_cksum; } +static inline void +update_pkt_header(struct rte_mbuf *pkt, uint32_t total_pkt_len) +{ + struct rte_ipv4_hdr *ip_hdr; + struct rte_udp_hdr *udp_hdr; + uint16_t pkt_data_len; + uint16_t pkt_len; + + pkt_data_len = (uint16_t) (total_pkt_len - ( + sizeof(struct rte_ether_hdr) + + sizeof(struct rte_ipv4_hdr) + + sizeof(struct rte_udp_hdr))); + /* updata udp pkt length */ + udp_hdr = rte_pktmbuf_mtod_offset(pkt, struct rte_udp_hdr *, + sizeof(struct rte_ether_hdr) + + sizeof(struct rte_ipv4_hdr)); + pkt_len = (uint16_t) (pkt_data_len + sizeof(struct rte_udp_hdr)); + udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len); + + /* updata ip pkt length and csum */ + ip_hdr = rte_pktmbuf_mtod_offset(pkt, struct rte_ipv4_hdr *, + sizeof(struct rte_ether_hdr)); + ip_hdr->hdr_checksum = 0; + pkt_len = (uint16_t) (pkt_len + sizeof(struct rte_ipv4_hdr)); + ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len); + ip_hdr->hdr_checksum = rte_ipv4_cksum(ip_hdr); +} + static inline bool pkt_burst_prepare(struct rte_mbuf *pkt, struct rte_mempool *mbp, struct rte_ether_hdr *eth_hdr, const uint16_t vlan_tci, @@ -223,6 +251,10 @@ pkt_burst_prepare(struct rte_mbuf *pkt, struct rte_mempool *mbp, copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt, sizeof(struct rte_ether_hdr) + sizeof(struct rte_ipv4_hdr)); + + if (unlikely(tx_pkt_split == TX_PKT_SPLIT_RND) || txonly_multi_flow) + update_pkt_header(pkt, pkt_len); + if (unlikely(timestamp_enable)) { uint64_t skew = RTE_PER_LCORE(timestamp_qskew); struct { -- 2.27.0