From: Ting Xu Date: Tue, 22 Oct 2019 16:26:36 +0000 (+0000) Subject: app/testpmd: add GTP parsing and Tx checksum offload X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d8e5e69f3a9b14c336ecc31a11a41c92488a1d28;p=dpdk.git app/testpmd: add GTP parsing and Tx checksum offload Enable testpmd to forward GTP packet in csum fwd mode. A GTP header structure (without optional fields and extension header) is defined in new rte_gtp.h. A parser function in testpmd is added. GTPU and GTPC packets are both supported, with respective UDP destination port and GTP message type. Signed-off-by: Ting Xu Reviewed-by: Ferruh Yigit --- diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c index e1cb7fb708..c3fd5e17d1 100644 --- a/app/test-pmd/csumonly.c +++ b/app/test-pmd/csumonly.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include #include @@ -179,6 +180,67 @@ parse_ethernet(struct rte_ether_hdr *eth_hdr, struct testpmd_offload_info *info) } } +/* + * Parse a GTP protocol header. + * No optional fields and next extension header type. + */ +static void +parse_gtp(struct rte_udp_hdr *udp_hdr, + struct testpmd_offload_info *info) +{ + struct rte_ipv4_hdr *ipv4_hdr; + struct rte_ipv6_hdr *ipv6_hdr; + struct rte_gtp_hdr *gtp_hdr; + uint8_t gtp_len = sizeof(*gtp_hdr); + uint8_t ip_ver; + + /* Check udp destination port. */ + if (udp_hdr->dst_port != _htons(RTE_GTPC_UDP_PORT) && + udp_hdr->src_port != _htons(RTE_GTPC_UDP_PORT) && + udp_hdr->dst_port != _htons(RTE_GTPU_UDP_PORT)) + 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; + info->l2_len = 0; + + gtp_hdr = (struct rte_gtp_hdr *)((char *)udp_hdr + + sizeof(struct rte_udp_hdr)); + + /* + * Check message type. If message type is 0xff, it is + * a GTP data packet. If not, it is a GTP control packet + */ + if (gtp_hdr->msg_type == 0xff) { + ip_ver = *(uint8_t *)((char *)udp_hdr + + sizeof(struct rte_udp_hdr) + + sizeof(struct rte_gtp_hdr)); + ip_ver = (ip_ver) & 0xf0; + + if (ip_ver == RTE_GTP_TYPE_IPV4) { + ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gtp_hdr + + gtp_len); + info->ethertype = _htons(RTE_ETHER_TYPE_IPV4); + parse_ipv4(ipv4_hdr, info); + } else if (ip_ver == RTE_GTP_TYPE_IPV6) { + ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gtp_hdr + + gtp_len); + info->ethertype = _htons(RTE_ETHER_TYPE_IPV6); + parse_ipv6(ipv6_hdr, info); + } + } else { + info->ethertype = 0; + info->l4_len = 0; + info->l3_len = 0; + info->l4_proto = 0; + } + + info->l2_len += RTE_ETHER_GTP_HLEN; +} + /* Parse a vxlan header */ static void parse_vxlan(struct rte_udp_hdr *udp_hdr, @@ -478,15 +540,22 @@ process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info, if (info->outer_l4_proto != IPPROTO_UDP) return ol_flags; + udp_hdr = (struct rte_udp_hdr *) + ((char *)outer_l3_hdr + info->outer_l3_len); + /* Skip SW outer UDP checksum generation if HW supports it */ if (tx_offloads & DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) { + if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4)) + udp_hdr->dgram_cksum + = rte_ipv4_phdr_cksum(ipv4_hdr, ol_flags); + else + udp_hdr->dgram_cksum + = rte_ipv6_phdr_cksum(ipv6_hdr, ol_flags); + ol_flags |= PKT_TX_OUTER_UDP_CKSUM; return ol_flags; } - udp_hdr = (struct rte_udp_hdr *) - ((char *)outer_l3_hdr + info->outer_l3_len); - /* outer UDP checksum is done in software. In the other side, for * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be * set to zero. @@ -679,6 +748,7 @@ pkt_copy_split(const struct rte_mbuf *pkt) * UDP|TCP|SCTP * Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / IP|IP6 / * UDP|TCP|SCTP + * Ether / (vlan) / outer IP / outer UDP / GTP / 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 @@ -787,16 +857,22 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) udp_hdr = (struct rte_udp_hdr *) ((char *)l3_hdr + info.l3_len); + parse_gtp(udp_hdr, &info); + if (info.is_tunnel) { + tx_ol_flags |= PKT_TX_TUNNEL_GTP; + goto tunnel_update; + } parse_vxlan_gpe(udp_hdr, &info); if (info.is_tunnel) { - tx_ol_flags |= PKT_TX_TUNNEL_VXLAN_GPE; - } else { - parse_vxlan(udp_hdr, &info, - m->packet_type); - if (info.is_tunnel) - tx_ol_flags |= - PKT_TX_TUNNEL_VXLAN; + tx_ol_flags |= + PKT_TX_TUNNEL_VXLAN_GPE; + goto tunnel_update; } + 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; @@ -815,6 +891,7 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) } } +tunnel_update: /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */ if (info.is_tunnel) { outer_l3_hdr = l3_hdr; diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md index d65b5ed84d..49ac0d14da 100644 --- a/doc/api/doxy-api-index.md +++ b/doc/api/doxy-api-index.md @@ -102,6 +102,7 @@ The public API headers are grouped by topics: [SCTP] (@ref rte_sctp.h), [TCP] (@ref rte_tcp.h), [UDP] (@ref rte_udp.h), + [GTP] (@ref rte_gtp.h), [GRO] (@ref rte_gro.h), [GSO] (@ref rte_gso.h), [frag/reass] (@ref rte_ip_frag.h), diff --git a/lib/librte_net/Makefile b/lib/librte_net/Makefile index 62735a5f97..9379e116bd 100644 --- a/lib/librte_net/Makefile +++ b/lib/librte_net/Makefile @@ -22,5 +22,6 @@ SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include := rte_ip.h rte_tcp.h rte_udp.h rte_esp SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include += rte_sctp.h rte_icmp.h rte_arp.h SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include += rte_ether.h rte_gre.h rte_net.h SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include += rte_net_crc.h rte_mpls.h rte_higig.h +SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include += rte_gtp.h include $(RTE_SDK)/mk/rte.lib.mk diff --git a/lib/librte_net/meson.build b/lib/librte_net/meson.build index c52c345927..b017168b49 100644 --- a/lib/librte_net/meson.build +++ b/lib/librte_net/meson.build @@ -12,6 +12,7 @@ headers = files('rte_ip.h', 'rte_arp.h', 'rte_ether.h', 'rte_gre.h', + 'rte_gtp.h', 'rte_net.h', 'rte_net_crc.h', 'rte_mpls.h', diff --git a/lib/librte_net/rte_gtp.h b/lib/librte_net/rte_gtp.h new file mode 100644 index 0000000000..59267c07b7 --- /dev/null +++ b/lib/librte_net/rte_gtp.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 1982, 1986, 1990, 1993 + * The Regents of the University of California. + * Copyright(c) 2010-2014 Intel Corporation. + * All rights reserved. + */ + +#ifndef _RTE_GTP_H_ +#define _RTE_GTP_H_ + +/** + * @file + * + * GTP-related defines + */ + +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * Simplified GTP protocol header. + * Contains 8-bit header info, 8-bit message type, + * 16-bit payload length after mandatory header, 32-bit TEID. + * No optional fields and next extension header. + */ +struct rte_gtp_hdr { + uint8_t gtp_hdr_info; /**< GTP header info */ + uint8_t msg_type; /**< GTP message type */ + uint16_t plen; /**< Total payload length */ + uint32_t teid; /**< Tunnel endpoint ID */ +} __attribute__((__packed__)); + +/** GTP header length */ +#define RTE_ETHER_GTP_HLEN \ + (sizeof(struct rte_udp_hdr) + sizeof(struct rte_gtp_hdr)) +/* GTP next protocal type */ +#define RTE_GTP_TYPE_IPV4 0x40 /**< GTP next protocal type IPv4 */ +#define RTE_GTP_TYPE_IPV6 0x60 /**< GTP next protocal type IPv6 */ +/* GTP destination port number */ +#define RTE_GTPC_UDP_PORT 2123 /**< GTP-C UDP destination port */ +#define RTE_GTPU_UDP_PORT 2152 /**< GTP-U UDP destination port */ + +#ifdef __cplusplus +} +#endif + +#endif /* RTE_GTP_H_ */