Release Notes for 18.10 - vpp - Vector Packet Processing

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author	Marco Varlese <marco.varlese@suse.com>	2018-10-18 09:19:15 +0200
committer	Damjan Marion <dmarion@me.com>	2018-10-23 11:56:46 +0000
commit	b9a4c445c1d4e9cdab476a8e1fb8a46ff0fc6080 (patch)
tree	94379c4146d9f3194260b727730e74c0615d150e /src/vnet/ip/ip6_hop_by_hop.h
parent	c3ac3131d4d6f20f28632484c3c3ead50aa11cac (diff)

Release Notes for 18.10

Change-Id: I3500113f30d6d98eae69d39b59b90569c796e011 Signed-off-by: Marco Varlese <marco.varlese@suse.com> (cherry picked from commit 3a9a6f72d18aa72e4038422a4c882927037441e7)

Diffstat (limited to 'src/vnet/ip/ip6_hop_by_hop.h')

0 files changed, 0 insertions, 0 deletions

/*- * BSD LICENSE * * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. * Copyright 2014 6WIND S.A. * 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 <stdarg.h> #include <stdio.h> #include <errno.h> #include <stdint.h> #include <unistd.h> #include <inttypes.h> #include <sys/queue.h> #include <sys/stat.h> #include <rte_common.h> #include <rte_byteorder.h> #include <rte_log.h> #include <rte_debug.h> #include <rte_cycles.h> #include <rte_memory.h> #include <rte_memcpy.h> #include <rte_memzone.h> #include <rte_launch.h> #include <rte_eal.h> #include <rte_per_lcore.h> #include <rte_lcore.h> #include <rte_atomic.h> #include <rte_branch_prediction.h> #include <rte_memory.h> #include <rte_mempool.h> #include <rte_mbuf.h> #include <rte_memcpy.h> #include <rte_interrupts.h> #include <rte_pci.h> #include <rte_ether.h> #include <rte_ethdev.h> #include <rte_ip.h> #include <rte_tcp.h> #include <rte_udp.h> #include <rte_sctp.h> #include <rte_prefetch.h> #include <rte_string_fns.h> #include <rte_flow.h> #include "testpmd.h" #define IP_DEFTTL 64 /* from RFC 1340. */ #define IP_VERSION 0x40 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */ #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN) #define GRE_KEY_PRESENT 0x2000 #define GRE_KEY_LEN 4 #define GRE_SUPPORTED_FIELDS GRE_KEY_PRESENT /* We cannot use rte_cpu_to_be_16() on a constant in a switch/case */ #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN #define _htons(x) ((uint16_t)((((x) & 0x00ffU) << 8) | (((x) & 0xff00U) >> 8))) #else #define _htons(x) (x) #endif /* structure that caches offload info for the current packet */ struct testpmd_offload_info { uint16_t ethertype; uint16_t l2_len; uint16_t l3_len; uint16_t l4_len; uint8_t l4_proto; uint8_t is_tunnel; uint16_t outer_ethertype; uint16_t outer_l2_len; uint16_t outer_l3_len; uint8_t outer_l4_proto; uint16_t tso_segsz; uint16_t tunnel_tso_segsz; uint32_t pkt_len; }; /* simplified GRE header */ struct simple_gre_hdr { uint16_t flags; uint16_t proto; } __attribute__((__packed__)); static uint16_t get_udptcp_checksum(void *l3_hdr, void *l4_hdr, uint16_t ethertype) { if (ethertype == _htons(ETHER_TYPE_IPv4)) return rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr); else /* assume ethertype == ETHER_TYPE_IPv6 */ return rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr); } /* Parse an IPv4 header to fill l3_len, l4_len, and l4_proto */ static void parse_ipv4(struct ipv4_hdr *ipv4_hdr, struct testpmd_offload_info *info) { struct tcp_hdr *tcp_hdr; info->l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4; info->l4_proto = ipv4_hdr->next_proto_id; /* only fill l4_len for TCP, it's useful for TSO */ if (info->l4_proto == IPPROTO_TCP) { tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + info->l3_len); info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2; } else info->l4_len = 0; } /* Parse an IPv6 header to fill l3_len, l4_len, and l4_proto */ static void parse_ipv6(struct ipv6_hdr *ipv6_hdr, struct testpmd_offload_info *info) { struct tcp_hdr *tcp_hdr; info->l3_len = sizeof(struct ipv6_hdr); info->l4_proto = ipv6_hdr->proto; /* only fill l4_len for TCP, it's useful for TSO */ if (info->l4_proto == IPPROTO_TCP) { tcp_hdr = (struct tcp_hdr *)((char *)ipv6_hdr + info->l3_len); info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2; } else info->l4_len = 0; } /* * Parse an ethernet header to fill the ethertype, l2_len, l3_len and * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan * header. The l4_len argument is only set in case of TCP (useful for TSO). */ static void parse_ethernet(struct ether_hdr *eth_hdr, struct testpmd_offload_info *info) { struct ipv4_hdr *ipv4_hdr; struct ipv6_hdr *ipv6_hdr; info->l2_len = sizeof(struct ether_hdr); info->ethertype = eth_hdr->ether_type; if (info->ethertype == _htons(ETHER_TYPE_VLAN)) { struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1); info->l2_len += sizeof(struct vlan_hdr); info->ethertype = vlan_hdr->eth_proto; } switch (info->ethertype) { case _htons(ETHER_TYPE_IPv4): ipv4_hdr = (struct ipv4_hdr *) ((char *)eth_hdr + info->l2_len); parse_ipv4(ipv4_hdr, info); break; case _htons(ETHER_TYPE_IPv6): ipv6_hdr = (struct ipv6_hdr *) ((char *)eth_hdr + info->l2_len); parse_ipv6(ipv6_hdr, info); break; default: info->l4_len = 0; info->l3_len = 0; info->l4_proto = 0; break; } } /* Parse a vxlan header */ static void parse_vxlan(struct udp_hdr *udp_hdr, struct testpmd_offload_info *info, uint32_t pkt_type) { struct ether_hdr *eth_hdr; /* 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 != _htons(4789) && RTE_ETH_IS_TUNNEL_PKT(pkt_type) == 0) return; info->is_tunnel = 1; info->outer_ethertype = info->ethertype; info->outer_l2_len = info->l2_len; info->outer_l3_len = info->l3_len; info->outer_l4_proto = info->l4_proto; eth_hdr = (struct ether_hdr *)((char *)udp_hdr + sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr)); parse_ethernet(eth_hdr, info); info->l2_len += ETHER_VXLAN_HLEN; /* add udp + vxlan */ } /* Parse a gre header */ static void parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info) { struct ether_hdr *eth_hdr; struct ipv4_hdr *ipv4_hdr; struct ipv6_hdr *ipv6_hdr; uint8_t gre_len = 0; /* check which fields are supported */ if ((gre_hdr->flags & _htons(~GRE_SUPPORTED_FIELDS)) != 0) return; gre_len += sizeof(struct simple_gre_hdr); if (gre_hdr->flags & _htons(GRE_KEY_PRESENT)) gre_len += GRE_KEY_LEN; if (gre_hdr->proto == _htons(ETHER_TYPE_IPv4)) { info->is_tunnel = 1; info->outer_ethertype = info->ethertype; info->outer_l2_len = info->l2_len; info->outer_l3_len = info->l3_len; info->outer_l4_proto = info->l4_proto; ipv4_hdr = (struct ipv4_hdr *)((char *)gre_hdr + gre_len); parse_ipv4(ipv4_hdr, info); info->ethertype = _htons(ETHER_TYPE_IPv4); info->l2_len = 0; } else if (gre_hdr->proto == _htons(ETHER_TYPE_IPv6)) { info->is_tunnel = 1; info->outer_ethertype = info->ethertype; info->outer_l2_len = info->l2_len; info->outer_l3_len = info->l3_len; info->outer_l4_proto = info->l4_proto; ipv6_hdr = (struct ipv6_hdr *)((char *)gre_hdr + gre_len); info->ethertype = _htons(ETHER_TYPE_IPv6); parse_ipv6(ipv6_hdr, info); info->l2_len = 0; } else if (gre_hdr->proto == _htons(ETHER_TYPE_TEB)) { info->is_tunnel = 1; info->outer_ethertype = info->ethertype; info->outer_l2_len = info->l2_len; info->outer_l3_len = info->l3_len; info->outer_l4_proto = info->l4_proto; eth_hdr = (struct ether_hdr *)((char *)gre_hdr + gre_len); parse_ethernet(eth_hdr, info); } else return; info->l2_len += gre_len; } /* Parse an encapsulated ip or ipv6 header */ static void parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info) { struct ipv4_hdr *ipv4_hdr = encap_ip; struct ipv6_hdr *ipv6_hdr = encap_ip; uint8_t ip_version; ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4; if (ip_version != 4 && ip_version != 6) return; info->is_tunnel = 1; info->outer_ethertype = info->ethertype; info->outer_l2_len = info->l2_len; info->outer_l3_len = info->l3_len; if (ip_version == 4) { parse_ipv4(ipv4_hdr, info); info->ethertype = _htons(ETHER_TYPE_IPv4); } else { parse_ipv6(ipv6_hdr, info); info->ethertype = _htons(ETHER_TYPE_IPv6); } info->l2_len = 0; } /* if possible, calculate the checksum of a packet in hw or sw, * depending on the testpmd command line configuration */ static uint64_t process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info, uint16_t testpmd_ol_flags) { struct ipv4_hdr *ipv4_hdr = l3_hdr; struct udp_hdr *udp_hdr; struct tcp_hdr *tcp_hdr; struct sctp_hdr *sctp_hdr; uint64_t ol_flags = 0; uint32_t max_pkt_len, tso_segsz = 0; /* ensure packet is large enough to require tso */ if (!info->is_tunnel) { max_pkt_len = info->l2_len + info->l3_len + info->l4_len + info->tso_segsz; if (info->tso_segsz != 0 && info->pkt_len > max_pkt_len) tso_segsz = info->tso_segsz; } else { max_pkt_len = info->outer_l2_len + info->outer_l3_len + info->l2_len + info->l3_len + info->l4_len + info->tunnel_tso_segsz; if (info->tunnel_tso_segsz != 0 && info->pkt_len > max_pkt_len) tso_segsz = info->tunnel_tso_segsz; } if (info->ethertype == _htons(ETHER_TYPE_IPv4)) { ipv4_hdr = l3_hdr; ipv4_hdr->hdr_checksum = 0; ol_flags |= PKT_TX_IPV4; if (info->l4_proto == IPPROTO_TCP && tso_segsz) { ol_flags |= PKT_TX_IP_CKSUM; } else { if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM) ol_flags |= PKT_TX_IP_CKSUM; else ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr); } } else if (info->ethertype == _htons(ETHER_TYPE_IPv6)) ol_flags |= PKT_TX_IPV6; else return 0; /* packet type not supported, nothing to do */ if (info->l4_proto == IPPROTO_UDP) { udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info->l3_len); /* do not recalculate udp cksum if it was 0 */ if (udp_hdr->dgram_cksum != 0) { udp_hdr->dgram_cksum = 0; if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_UDP_CKSUM) ol_flags |= PKT_TX_UDP_CKSUM; else { udp_hdr->dgram_cksum = get_udptcp_checksum(l3_hdr, udp_hdr, info->ethertype); } } } else if (info->l4_proto == IPPROTO_TCP) { tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + info->l3_len); tcp_hdr->cksum = 0; if (tso_segsz) ol_flags |= PKT_TX_TCP_SEG; else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_TCP_CKSUM) ol_flags |= PKT_TX_TCP_CKSUM; else { tcp_hdr->cksum = get_udptcp_checksum(l3_hdr, tcp_hdr, info->ethertype); } } else if (info->l4_proto == IPPROTO_SCTP) { sctp_hdr = (struct sctp_hdr *)((char *)l3_hdr + info->l3_len); sctp_hdr->cksum = 0; /* sctp payload must be a multiple of 4 to be * offloaded */ if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_SCTP_CKSUM) && ((ipv4_hdr->total_length & 0x3) == 0)) { ol_flags |= PKT_TX_SCTP_CKSUM; } else { /* XXX implement CRC32c, example available in * RFC3309 */ } } return ol_flags; } /* Calculate the checksum of outer header */ static uint64_t process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info, uint16_t testpmd_ol_flags, int tso_enabled) { struct ipv4_hdr *ipv4_hdr = outer_l3_hdr; struct ipv6_hdr *ipv6_hdr = outer_l3_hdr; struct udp_hdr *udp_hdr; uint64_t ol_flags = 0; if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4)) { ipv4_hdr->hdr_checksum = 0; ol_flags |= PKT_TX_OUTER_IPV4; if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) ol_flags |= PKT_TX_OUTER_IP_CKSUM; else ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr); } else ol_flags |= PKT_TX_OUTER_IPV6; if (info->outer_l4_proto != IPPROTO_UDP) return ol_flags; udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + info->outer_l3_len); /* outer UDP checksum is done in software as we have no hardware * supporting it today, and no API for it. In the other side, for * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be * set to zero. * * If a packet will be TSOed into small packets by NIC, we cannot * set/calculate a non-zero checksum, because it will be a wrong * value after the packet be split into several small packets. */ if (tso_enabled) udp_hdr->dgram_cksum = 0; /* do not recalculate udp cksum if it was 0 */ if (udp_hdr->dgram_cksum != 0) { udp_hdr->dgram_cksum = 0; if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4)) udp_hdr->dgram_cksum = rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr); else udp_hdr->dgram_cksum = rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr); } return ol_flags; } /* * Helper function. * Performs actual copying. * Returns number of segments in the destination mbuf on success, * or negative error code on failure. */ static int mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[], uint16_t seglen[], uint8_t nb_seg) { uint32_t dlen, slen, tlen; uint32_t i, len; const struct rte_mbuf *m; const uint8_t *src; uint8_t *dst; dlen = 0; slen = 0; tlen = 0; dst = NULL; src = NULL; m = ms; i = 0; while (ms != NULL && i != nb_seg) { if (slen == 0) { slen = rte_pktmbuf_data_len(ms); src = rte_pktmbuf_mtod(ms, const uint8_t *); } if (dlen == 0) { dlen = RTE_MIN(seglen[i], slen); md[i]->data_len = dlen; md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1]; dst = rte_pktmbuf_mtod(md[i], uint8_t *); } len = RTE_MIN(slen, dlen); memcpy(dst, src, len); tlen += len; slen -= len; dlen -= len; src += len; dst += len; if (slen == 0) ms = ms->next; if (dlen == 0) i++; } if (ms != NULL) return -ENOBUFS; else if (tlen != m->pkt_len) return -EINVAL; md[0]->nb_segs = nb_seg; md[0]->pkt_len = tlen; md[0]->vlan_tci = m->vlan_tci; md[0]->vlan_tci_outer = m->vlan_tci_outer; md[0]->ol_flags = m->ol_flags; md[0]->tx_offload = m->tx_offload; return nb_seg; } /* * Allocate a new mbuf with up to tx_pkt_nb_segs segments. * Copy packet contents and offload information into then new segmented mbuf. */ static struct rte_mbuf * pkt_copy_split(const struct rte_mbuf *pkt) { int32_t n, rc; uint32_t i, len, nb_seg; struct rte_mempool *mp; uint16_t seglen[RTE_MAX_SEGS_PER_PKT]; struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT]; mp = current_fwd_lcore()->mbp; if (tx_pkt_split == TX_PKT_SPLIT_RND) nb_seg = random() % tx_pkt_nb_segs + 1; else nb_seg = tx_pkt_nb_segs; memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0])); /* calculate number of segments to use and their length. */ len = 0; for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) { len += seglen[i]; md[i] = NULL; } n = pkt->pkt_len - len; /* update size of the last segment to fit rest of the packet */ if (n >= 0) { seglen[i - 1] += n; len += n; } nb_seg = i; while (i != 0) { p = rte_pktmbuf_alloc(mp); if (p == NULL) { RTE_LOG(ERR, USER1, "failed to allocate %u-th of %u mbuf " "from mempool: %s\n", nb_seg - i, nb_seg, mp->name); break; } md[--i] = p; if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) { RTE_LOG(ERR, USER1, "mempool %s, %u-th segment: " "expected seglen: %u, " "actual mbuf tailroom: %u\n", mp->name, i, seglen[i], rte_pktmbuf_tailroom(md[i])); break; } } /* all mbufs successfully allocated, do copy */ if (i == 0) { rc = mbuf_copy_split(pkt, md, seglen, nb_seg); if (rc < 0) RTE_LOG(ERR, USER1, "mbuf_copy_split for %p(len=%u, nb_seg=%u) " "into %u segments failed with error code: %d\n", pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc); /* figure out how many mbufs to free. */ i = RTE_MAX(rc, 0); } /* free unused mbufs */ for (; i != nb_seg; i++) { rte_pktmbuf_free_seg(md[i]); md[i] = NULL; } return md[0]; } /* * Receive a burst of packets, and for each packet: * - parse packet, and try to recognize a supported packet type (1) * - if it's not a supported packet type, don't touch the packet, else: * - reprocess the checksum of all supported layers. This is done in SW * or HW, depending on testpmd command line configuration * - if TSO is enabled in testpmd command line, also flag the mbuf for TCP * segmentation offload (this implies HW TCP checksum) * Then transmit packets on the output port. * * (1) Supported packets are: * Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP . * Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 / * UDP|TCP|SCTP * Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP * Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP * Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP * * The testpmd command line for this forward engine sets the flags * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control * wether a checksum must be calculated in software or in hardware. The * IP, UDP, TCP and SCTP flags always concern the inner layer. The * OUTER_IP is only useful for tunnel packets. */ static void pkt_burst_checksum_forward(struct fwd_stream *fs) { struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; struct rte_port *txp; struct rte_mbuf *m, *p; struct ether_hdr *eth_hdr; void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */ uint16_t nb_rx; uint16_t nb_tx; uint16_t nb_prep; uint16_t i; uint64_t rx_ol_flags, tx_ol_flags; uint16_t testpmd_ol_flags; uint32_t retry; uint32_t rx_bad_ip_csum; uint32_t rx_bad_l4_csum; struct testpmd_offload_info info; #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES uint64_t start_tsc; uint64_t end_tsc; uint64_t core_cycles; #endif #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES start_tsc = rte_rdtsc(); #endif /* receive a burst of packet */ nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst, nb_pkt_per_burst); if (unlikely(nb_rx == 0)) return; #ifdef RTE_TEST_PMD_RECORD_BURST_STATS fs->rx_burst_stats.pkt_burst_spread[nb_rx]++; #endif fs->rx_packets += nb_rx; rx_bad_ip_csum = 0; rx_bad_l4_csum = 0; txp = &ports[fs->tx_port]; testpmd_ol_flags = txp->tx_ol_flags; memset(&info, 0, sizeof(info)); info.tso_segsz = txp->tso_segsz; info.tunnel_tso_segsz = txp->tunnel_tso_segsz; for (i = 0; i < nb_rx; i++) { if (likely(i < nb_rx - 1)) rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1], void *)); m = pkts_burst[i]; info.is_tunnel = 0; info.pkt_len = rte_pktmbuf_pkt_len(m); tx_ol_flags = 0; rx_ol_flags = m->ol_flags; /* Update the L3/L4 checksum error packet statistics */ if ((rx_ol_flags & PKT_RX_IP_CKSUM_MASK) == PKT_RX_IP_CKSUM_BAD) rx_bad_ip_csum += 1; if ((rx_ol_flags & PKT_RX_L4_CKSUM_MASK) == PKT_RX_L4_CKSUM_BAD) rx_bad_l4_csum += 1; /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan * and inner headers */ eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); ether_addr_copy(&peer_eth_addrs[fs->peer_addr], &eth_hdr->d_addr); ether_addr_copy(&ports[fs->tx_port].eth_addr, &eth_hdr->s_addr); parse_ethernet(eth_hdr, &info); l3_hdr = (char *)eth_hdr + info.l2_len; /* check if it's a supported tunnel */ if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) { if (info.l4_proto == IPPROTO_UDP) { struct udp_hdr *udp_hdr; udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info.l3_len); parse_vxlan(udp_hdr, &info, m->packet_type); if (info.is_tunnel) tx_ol_flags |= PKT_TX_TUNNEL_VXLAN; } else if (info.l4_proto == IPPROTO_GRE) { struct simple_gre_hdr *gre_hdr; gre_hdr = (struct simple_gre_hdr *) ((char *)l3_hdr + info.l3_len); parse_gre(gre_hdr, &info); if (info.is_tunnel) tx_ol_flags |= PKT_TX_TUNNEL_GRE; } else if (info.l4_proto == IPPROTO_IPIP) { void *encap_ip_hdr; encap_ip_hdr = (char *)l3_hdr + info.l3_len; parse_encap_ip(encap_ip_hdr, &info); if (info.is_tunnel) tx_ol_flags |= PKT_TX_TUNNEL_IPIP; } } /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */ if (info.is_tunnel) { outer_l3_hdr = l3_hdr; l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len; } /* step 2: depending on user command line configuration, * recompute checksum either in software or flag the * mbuf to offload the calculation to the NIC. If TSO * is configured, prepare the mbuf for TCP segmentation. */ /* process checksums of inner headers first */ tx_ol_flags |= process_inner_cksums(l3_hdr, &info, testpmd_ol_flags); /* Then process outer headers if any. Note that the software * checksum will be wrong if one of the inner checksums is * processed in hardware. */ if (info.is_tunnel == 1) { tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info, testpmd_ol_flags, !!(tx_ol_flags & PKT_TX_TCP_SEG)); } /* step 3: fill the mbuf meta data (flags and header lengths) */ if (info.is_tunnel == 1) { if (info.tunnel_tso_segsz || (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) || (tx_ol_flags & PKT_TX_OUTER_IPV6)) { m->outer_l2_len = info.outer_l2_len; m->outer_l3_len = info.outer_l3_len; m->l2_len = info.l2_len; m->l3_len = info.l3_len; m->l4_len = info.l4_len; m->tso_segsz = info.tunnel_tso_segsz; } else { /* if there is a outer UDP cksum processed in sw and the inner in hw, the outer checksum will be wrong as the payload will be modified by the hardware */ m->l2_len = info.outer_l2_len + info.outer_l3_len + info.l2_len; m->l3_len = info.l3_len; m->l4_len = info.l4_len; } } else { /* this is only useful if an offload flag is * set, but it does not hurt to fill it in any * case */ m->l2_len = info.l2_len; m->l3_len = info.l3_len; m->l4_len = info.l4_len; m->tso_segsz = info.tso_segsz; } m->ol_flags = tx_ol_flags; /* Do split & copy for the packet. */ if (tx_pkt_split != TX_PKT_SPLIT_OFF) { p = pkt_copy_split(m); if (p != NULL) { rte_pktmbuf_free(m); m = p; pkts_burst[i] = m; } } /* if verbose mode is enabled, dump debug info */ if (verbose_level > 0) { char buf[256]; printf("-----------------\n"); printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%u:\n", fs->rx_port, m, m->pkt_len, m->nb_segs); /* dump rx parsed packet info */ rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf)); printf("rx: l2_len=%d ethertype=%x l3_len=%d " "l4_proto=%d l4_len=%d flags=%s\n", info.l2_len, rte_be_to_cpu_16(info.ethertype), info.l3_len, info.l4_proto, info.l4_len, buf); if (rx_ol_flags & PKT_RX_LRO) printf("rx: m->lro_segsz=%u\n", m->tso_segsz); if (info.is_tunnel == 1) printf("rx: outer_l2_len=%d outer_ethertype=%x " "outer_l3_len=%d\n", info.outer_l2_len, rte_be_to_cpu_16(info.outer_ethertype), info.outer_l3_len); /* dump tx packet info */ if ((testpmd_ol_flags & (TESTPMD_TX_OFFLOAD_IP_CKSUM | TESTPMD_TX_OFFLOAD_UDP_CKSUM | TESTPMD_TX_OFFLOAD_TCP_CKSUM | TESTPMD_TX_OFFLOAD_SCTP_CKSUM)) || info.tso_segsz != 0) printf("tx: m->l2_len=%d m->l3_len=%d " "m->l4_len=%d\n", m->l2_len, m->l3_len, m->l4_len); if (info.is_tunnel == 1) { if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) || (tx_ol_flags & PKT_TX_OUTER_IPV6)) printf("tx: m->outer_l2_len=%d " "m->outer_l3_len=%d\n", m->outer_l2_len, m->outer_l3_len); if (info.tunnel_tso_segsz != 0 && (m->ol_flags & PKT_TX_TCP_SEG)) printf("tx: m->tso_segsz=%d\n", m->tso_segsz); } else if (info.tso_segsz != 0 && (m->ol_flags & PKT_TX_TCP_SEG)) printf("tx: m->tso_segsz=%d\n", m->tso_segsz); rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf)); printf("tx: flags=%s", buf); printf("\n"); } } nb_prep = rte_eth_tx_prepare(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx); if (nb_prep != nb_rx) printf("Preparing packet burst to transmit failed: %s\n", rte_strerror(rte_errno)); nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_prep); /* * Retry if necessary */ if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) { retry = 0; while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) { rte_delay_us(burst_tx_delay_time); nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, &pkts_burst[nb_tx], nb_rx - nb_tx); } } fs->tx_packets += nb_tx; fs->rx_bad_ip_csum += rx_bad_ip_csum; fs->rx_bad_l4_csum += rx_bad_l4_csum; #ifdef RTE_TEST_PMD_RECORD_BURST_STATS fs->tx_burst_stats.pkt_burst_spread[nb_tx]++; #endif if (unlikely(nb_tx < nb_rx)) { fs->fwd_dropped += (nb_rx - nb_tx); do { rte_pktmbuf_free(pkts_burst[nb_tx]); } while (++nb_tx < nb_rx); } #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES end_tsc = rte_rdtsc(); core_cycles = (end_tsc - start_tsc); fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles); #endif } struct fwd_engine csum_fwd_engine = { .fwd_mode_name = "csum", .port_fwd_begin = NULL, .port_fwd_end = NULL, .packet_fwd = pkt_burst_checksum_forward, };


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