--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <stdint.h>
+#include <rte_mbuf.h>
+#include <rte_hash_crc.h>
+#include <rte_byteorder.h>
+#include <rte_udp.h>
+#include <rte_tcp.h>
+#include <rte_sctp.h>
+
+#include "main.h"
+#include "vxlan.h"
+
+static uint16_t
+get_psd_sum(void *l3_hdr, uint16_t ethertype, uint64_t ol_flags)
+{
+ if (ethertype == ETHER_TYPE_IPv4)
+ return rte_ipv4_phdr_cksum(l3_hdr, ol_flags);
+ else /* assume ethertype == ETHER_TYPE_IPv6 */
+ return rte_ipv6_phdr_cksum(l3_hdr, ol_flags);
+}
+
+/**
+ * Parse an ethernet header to fill the ethertype, outer_l2_len, outer_l3_len and
+ * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
+ * header.
+ */
+static void
+parse_ethernet(struct ether_hdr *eth_hdr, union tunnel_offload_info *info,
+ uint8_t *l4_proto)
+{
+ struct ipv4_hdr *ipv4_hdr;
+ struct ipv6_hdr *ipv6_hdr;
+ uint16_t ethertype;
+
+ info->outer_l2_len = sizeof(struct ether_hdr);
+ ethertype = rte_be_to_cpu_16(eth_hdr->ether_type);
+
+ if (ethertype == ETHER_TYPE_VLAN) {
+ struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
+ info->outer_l2_len += sizeof(struct vlan_hdr);
+ ethertype = rte_be_to_cpu_16(vlan_hdr->eth_proto);
+ }
+
+ switch (ethertype) {
+ case ETHER_TYPE_IPv4:
+ ipv4_hdr = (struct ipv4_hdr *)
+ ((char *)eth_hdr + info->outer_l2_len);
+ info->outer_l3_len = sizeof(struct ipv4_hdr);
+ *l4_proto = ipv4_hdr->next_proto_id;
+ break;
+ case ETHER_TYPE_IPv6:
+ ipv6_hdr = (struct ipv6_hdr *)
+ ((char *)eth_hdr + info->outer_l2_len);
+ info->outer_l3_len = sizeof(struct ipv6_hdr);
+ *l4_proto = ipv6_hdr->proto;
+ break;
+ default:
+ info->outer_l3_len = 0;
+ *l4_proto = 0;
+ break;
+ }
+}
+
+/**
+ * Calculate the checksum of a packet in hardware
+ */
+static uint64_t
+process_inner_cksums(struct ether_hdr *eth_hdr, union tunnel_offload_info *info)
+{
+ void *l3_hdr = NULL;
+ uint8_t l4_proto;
+ uint16_t ethertype;
+ struct ipv4_hdr *ipv4_hdr;
+ struct ipv6_hdr *ipv6_hdr;
+ struct udp_hdr *udp_hdr;
+ struct tcp_hdr *tcp_hdr;
+ struct sctp_hdr *sctp_hdr;
+ uint64_t ol_flags = 0;
+
+ info->l2_len = sizeof(struct ether_hdr);
+ ethertype = rte_be_to_cpu_16(eth_hdr->ether_type);
+
+ if (ethertype == ETHER_TYPE_VLAN) {
+ struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
+ info->l2_len += sizeof(struct vlan_hdr);
+ ethertype = rte_be_to_cpu_16(vlan_hdr->eth_proto);
+ }
+
+ l3_hdr = (char *)eth_hdr + info->l2_len;
+
+ if (ethertype == ETHER_TYPE_IPv4) {
+ ipv4_hdr = (struct ipv4_hdr *)l3_hdr;
+ ipv4_hdr->hdr_checksum = 0;
+ ol_flags |= PKT_TX_IPV4;
+ ol_flags |= PKT_TX_IP_CKSUM;
+ info->l3_len = sizeof(struct ipv4_hdr);
+ l4_proto = ipv4_hdr->next_proto_id;
+ } else if (ethertype == ETHER_TYPE_IPv6) {
+ ipv6_hdr = (struct ipv6_hdr *)l3_hdr;
+ info->l3_len = sizeof(struct ipv6_hdr);
+ l4_proto = ipv6_hdr->proto;
+ ol_flags |= PKT_TX_IPV6;
+ } else
+ return 0; /* packet type not supported, nothing to do */
+
+ if (l4_proto == IPPROTO_UDP) {
+ udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info->l3_len);
+ ol_flags |= PKT_TX_UDP_CKSUM;
+ udp_hdr->dgram_cksum = get_psd_sum(l3_hdr,
+ ethertype, ol_flags);
+ } else if (l4_proto == IPPROTO_TCP) {
+ tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + info->l3_len);
+ ol_flags |= PKT_TX_TCP_CKSUM;
+ tcp_hdr->cksum = get_psd_sum(l3_hdr, ethertype,
+ ol_flags);
+ if (tso_segsz != 0) {
+ ol_flags |= PKT_TX_TCP_SEG;
+ info->tso_segsz = tso_segsz;
+ info->l4_len = sizeof(struct tcp_hdr);
+ }
+
+ } else if (l4_proto == IPPROTO_SCTP) {
+ sctp_hdr = (struct sctp_hdr *)((char *)l3_hdr + info->l3_len);
+ sctp_hdr->cksum = 0;
+ ol_flags |= PKT_TX_SCTP_CKSUM;
+ }
+
+ return ol_flags;
+}
+
+int
+decapsulation(struct rte_mbuf *pkt)
+{
+ uint8_t l4_proto = 0;
+ uint16_t outer_header_len;
+ struct udp_hdr *udp_hdr;
+ union tunnel_offload_info info = { .data = 0 };
+ struct ether_hdr *phdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
+
+ parse_ethernet(phdr, &info, &l4_proto);
+
+ if (l4_proto != IPPROTO_UDP)
+ return -1;
+
+ udp_hdr = (struct udp_hdr *)((char *)phdr +
+ info.outer_l2_len + info.outer_l3_len);
+
+ /** check udp destination port, 4789 is the default vxlan port
+ * (rfc7348) or that the rx offload flag is set (i40e only
+ * currently)*/
+ if (udp_hdr->dst_port != rte_cpu_to_be_16(DEFAULT_VXLAN_PORT) &&
+ (pkt->packet_type & RTE_PTYPE_TUNNEL_MASK) == 0)
+ return -1;
+ outer_header_len = info.outer_l2_len + info.outer_l3_len
+ + sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr);
+
+ rte_pktmbuf_adj(pkt, outer_header_len);
+
+ return 0;
+}
+
+void
+encapsulation(struct rte_mbuf *m, uint8_t queue_id)
+{
+ uint vport_id;
+ uint64_t ol_flags = 0;
+ uint32_t old_len = m->pkt_len, hash;
+ union tunnel_offload_info tx_offload = { .data = 0 };
+ struct ether_hdr *phdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+
+ /*Allocate space for new ethernet, IPv4, UDP and VXLAN headers*/
+ struct ether_hdr *pneth = (struct ether_hdr *) rte_pktmbuf_prepend(m,
+ sizeof(struct ether_hdr) + sizeof(struct ipv4_hdr)
+ + sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr));
+
+ struct ipv4_hdr *ip = (struct ipv4_hdr *) &pneth[1];
+ struct udp_hdr *udp = (struct udp_hdr *) &ip[1];
+ struct vxlan_hdr *vxlan = (struct vxlan_hdr *) &udp[1];
+
+ /* convert TX queue ID to vport ID */
+ vport_id = queue_id - 1;
+
+ /* replace original Ethernet header with ours */
+ pneth = rte_memcpy(pneth, &app_l2_hdr[vport_id],
+ sizeof(struct ether_hdr));
+
+ /* copy in IP header */
+ ip = rte_memcpy(ip, &app_ip_hdr[vport_id],
+ sizeof(struct ipv4_hdr));
+ ip->total_length = rte_cpu_to_be_16(m->data_len
+ - sizeof(struct ether_hdr));
+
+ /* outer IP checksum */
+ ol_flags |= PKT_TX_OUTER_IP_CKSUM;
+ ip->hdr_checksum = 0;
+
+ /* inner IP checksum offload */
+ if (tx_checksum) {
+ ol_flags |= process_inner_cksums(phdr, &tx_offload);
+ m->l2_len = tx_offload.l2_len;
+ m->l3_len = tx_offload.l3_len;
+ m->l4_len = tx_offload.l4_len;
+ m->l2_len += ETHER_VXLAN_HLEN;
+ }
+
+ m->outer_l2_len = sizeof(struct ether_hdr);
+ m->outer_l3_len = sizeof(struct ipv4_hdr);
+
+ m->ol_flags |= ol_flags;
+ m->tso_segsz = tx_offload.tso_segsz;
+
+ /*VXLAN HEADER*/
+ vxlan->vx_flags = rte_cpu_to_be_32(VXLAN_HF_VNI);
+ vxlan->vx_vni = rte_cpu_to_be_32(vxdev.out_key << 8);
+
+ /*UDP HEADER*/
+ udp->dgram_cksum = 0;
+ udp->dgram_len = rte_cpu_to_be_16(old_len
+ + sizeof(struct udp_hdr)
+ + sizeof(struct vxlan_hdr));
+
+ udp->dst_port = rte_cpu_to_be_16(vxdev.dst_port);
+ hash = rte_hash_crc(phdr, 2 * ETHER_ADDR_LEN, phdr->ether_type);
+ udp->src_port = rte_cpu_to_be_16((((uint64_t) hash * PORT_RANGE) >> 32)
+ + PORT_MIN);
+
+ return;
+}
Code Review / deb_dpdk.git / blobdiff