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 8E030A034C for ; Tue, 18 Aug 2020 08:50:29 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 7E0541C0B1; Tue, 18 Aug 2020 08:50:29 +0200 (CEST) Received: from mail.chinasoftinc.com (unknown [114.113.233.8]) by dpdk.org (Postfix) with ESMTP id 76AE11C0AD for ; Tue, 18 Aug 2020 08:50:28 +0200 (CEST) Received: from localhost.localdomain (120.133.139.157) by INCCAS001.ito.icss (10.168.0.60) with Microsoft SMTP Server id 14.3.487.0; Tue, 18 Aug 2020 14:49:58 +0800 From: "Wei Hu (Xavier)" To: , CC: Date: Tue, 18 Aug 2020 14:49:29 +0800 Message-ID: <20200818064931.46414-9-huwei013@chinasoftinc.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200818064931.46414-1-huwei013@chinasoftinc.com> References: <20200817092532.59530-1-huwei013@chinasoftinc.com> <20200818064931.46414-1-huwei013@chinasoftinc.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [120.133.139.157] Subject: [dpdk-stable] [PATCH v2 08/10] net/hns3: fix reassembling multiple segment packets in Tx X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" From: "Wei Hu (Xavier)" [ upstream commit 6c44219f9907a064049d160d366d98bb840724a6 ] Because of the hardware constraints, hns3 network engine doesn't support sending packets with more than eight fragments. And hns3 pmd driver tries to reassemble these kind of packets to meet hardware requirements. Currently, there are two problems: 1) when the input buffer_len * 8 < pkt_len, the packets are impossible to be reassembled into 8 Buffer Descriptors. In this case, the packets will be passed to hardware, which eventually causes a hardware reset. 2) The meta data in origin packets which are required to fill into the descriptor haven't been copied into the reassembled pkts. This patch adds a check for 1) to ensure such packets will be dropped by driver and copies useful meta data from the origin packets to the reassembled packets. Fixes: bba636698316 ("net/hns3: support Rx/Tx and related operations") Cc: stable@dpdk.org Signed-off-by: Chengchang Tang Signed-off-by: Wei Hu (Xavier) Signed-off-by: Chengwen Feng --- drivers/net/hns3/hns3_rxtx.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c index c1ffa136b..e04f62c9d 100644 --- a/drivers/net/hns3/hns3_rxtx.c +++ b/drivers/net/hns3/hns3_rxtx.c @@ -1940,6 +1940,20 @@ hns3_tx_alloc_mbufs(struct hns3_tx_queue *txq, struct rte_mempool *mb_pool, return 0; } +static inline void +hns3_pktmbuf_copy_hdr(struct rte_mbuf *new_pkt, struct rte_mbuf *old_pkt) +{ + new_pkt->ol_flags = old_pkt->ol_flags; + new_pkt->pkt_len = rte_pktmbuf_pkt_len(old_pkt); + new_pkt->outer_l2_len = old_pkt->outer_l2_len; + new_pkt->outer_l3_len = old_pkt->outer_l3_len; + new_pkt->l2_len = old_pkt->l2_len; + new_pkt->l3_len = old_pkt->l3_len; + new_pkt->l4_len = old_pkt->l4_len; + new_pkt->vlan_tci_outer = old_pkt->vlan_tci_outer; + new_pkt->vlan_tci = old_pkt->vlan_tci; +} + static int hns3_reassemble_tx_pkts(void *tx_queue, struct rte_mbuf *tx_pkt, struct rte_mbuf **new_pkt) @@ -1963,9 +1977,11 @@ hns3_reassemble_tx_pkts(void *tx_queue, struct rte_mbuf *tx_pkt, mb_pool = tx_pkt->pool; buf_size = tx_pkt->buf_len - RTE_PKTMBUF_HEADROOM; - nb_new_buf = (tx_pkt->pkt_len - 1) / buf_size + 1; + nb_new_buf = (rte_pktmbuf_pkt_len(tx_pkt) - 1) / buf_size + 1; + if (nb_new_buf > HNS3_MAX_NON_TSO_BD_PER_PKT) + return -EINVAL; - last_buf_len = tx_pkt->pkt_len % buf_size; + last_buf_len = rte_pktmbuf_pkt_len(tx_pkt) % buf_size; if (last_buf_len == 0) last_buf_len = buf_size; @@ -1977,7 +1993,7 @@ hns3_reassemble_tx_pkts(void *tx_queue, struct rte_mbuf *tx_pkt, /* Copy the original packet content to the new mbufs */ temp = tx_pkt; s = rte_pktmbuf_mtod(temp, char *); - len_s = temp->data_len; + len_s = rte_pktmbuf_data_len(temp); temp_new = new_mbuf; for (i = 0; i < nb_new_buf; i++) { d = rte_pktmbuf_mtod(temp_new, char *); @@ -2000,13 +2016,14 @@ hns3_reassemble_tx_pkts(void *tx_queue, struct rte_mbuf *tx_pkt, if (temp == NULL) break; s = rte_pktmbuf_mtod(temp, char *); - len_s = temp->data_len; + len_s = rte_pktmbuf_data_len(temp); } } temp_new->data_len = buf_len; temp_new = temp_new->next; } + hns3_pktmbuf_copy_hdr(new_mbuf, tx_pkt); /* free original mbufs */ rte_pktmbuf_free(tx_pkt); -- 2.27.0