For VXLAN packet, the inner Tx checksum offload means inner IPv4 and inner
L4(TCP/UDP/SCTP).
Signed-off-by: Jijiang Liu <jijiang.liu at intel.com>
---
examples/tep_termination/main.c | 15 +++++++
examples/tep_termination/vxlan.c | 77 ++++++++++++++++++++++++++++++++++++++
2 files changed, 92 insertions(+), 0 deletions(-)
diff --git a/examples/tep_termination/main.c b/examples/tep_termination/main.c
index e8142e0..7c69a82 100644
--- a/examples/tep_termination/main.c
+++ b/examples/tep_termination/main.c
@@ -119,6 +119,9 @@ uint16_t num_devices;
/* VXLAN UDP destination port */
uint16_t udp_port;
+/* enable/disable inner TX checksum */
+uint8_t tx_checksum;
+
/* RX filter type for tunneling packet */
uint8_t filter_idx;
@@ -242,6 +245,7 @@ vep_termination_usage(const char *prgname)
RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n"
" --udp-port: UDP destination port for VXLAN packet\n"
" --nb-devices: number of virtIO device\n"
+ " --tx-checksum [0|1]: inner Tx checksum offload\n"
" --filter-type[1-3]: filter type for tunneling packet\n"
" 1: Inner MAC&VLAN and tenent ID\n"
" 2: Inner MAC and tenent ID\n"
@@ -266,6 +270,7 @@ tep_parse_args(int argc, char **argv)
static struct option long_option[] = {
{"udp-port", required_argument, NULL, 0},
{"nb-devices", required_argument, NULL, 0},
+ {"tx-checksum", required_argument, NULL, 0},
{"filter-type", required_argument, NULL, 0},
{"stats", required_argument, NULL, 0},
{"dev-basename", required_argument, NULL, 0},
@@ -305,6 +310,16 @@ tep_parse_args(int argc, char **argv)
return -1;
}
}
+
+ if (!strncmp(long_option[option_index].name,
"tx-checksum", MAX_LONG_OPT_SZ)) {
+ ret = parse_num_opt(optarg, 1);
+ if (ret == -1) {
+ RTE_LOG(INFO, VHOST_CONFIG, "Invalid
argument for tx-checksum [0|1]\n");
+ vep_termination_usage(prgname);
+ return -1;
+ } else
+ tx_checksum = ret;
+ }
if (!strncmp(long_option[option_index].name,
"filter-type", MAX_LONG_OPT_SZ)) {
ret = parse_num_opt(optarg, 3);
diff --git a/examples/tep_termination/vxlan.c b/examples/tep_termination/vxlan.c
index 942eb10..6fc75ee 100644
--- a/examples/tep_termination/vxlan.c
+++ b/examples/tep_termination/vxlan.c
@@ -43,11 +43,21 @@
#include "main.h"
#include "vxlan.h"
+extern uint8_t tx_checksum;
extern struct vxlan_conf vxdev;
extern struct ipv4_hdr app_ip_hdr[VXLAN_N_PORTS];
extern struct ether_hdr app_l2_hdr[VXLAN_N_PORTS];
extern uint16_t udp_port;
+static uint16_t
+get_psd_sum(void *l3_hdr, uint16_t ethertype, uint64_t ol_flags)
+{
+ if (ethertype == rte_cpu_to_be_16(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, l2_len, l3_len and
* ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
@@ -87,6 +97,67 @@ parse_ethernet(struct ether_hdr *eth_hdr, struct
offload_info *info)
}
}
+/* 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(struct ether_hdr *eth_hdr, struct offload_info *info)
+{
+ void *l3_hdr = NULL;
+ 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);
+ info->ethertype = eth_hdr->ether_type;
+
+ if (info->ethertype == rte_cpu_to_be_16(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;
+ }
+
+ l3_hdr = (char *)eth_hdr + info->l2_len;
+
+ if (info->ethertype == rte_cpu_to_be_16(ETHER_TYPE_IPv4)) {
+ 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);
+ info->l4_proto = ipv4_hdr->next_proto_id;
+ } else if (info->ethertype == rte_cpu_to_be_16(ETHER_TYPE_IPv6)) {
+ ipv6_hdr = l3_hdr;
+ info->l3_len = sizeof(struct ipv6_hdr);
+ info->l4_proto = ipv6_hdr->proto;
+ 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 */
+ udp_hdr->dgram_cksum = 0;
+ ol_flags |= PKT_TX_UDP_CKSUM;
+ udp_hdr->dgram_cksum = get_psd_sum(l3_hdr,
+ info->ethertype, ol_flags);
+ } else if (info->l4_proto == IPPROTO_TCP) {
+ tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + info->l3_len);
+ tcp_hdr->cksum = 0;
+ ol_flags |= PKT_TX_TCP_CKSUM;
+ tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype,
+ ol_flags);
+
+ } else if (info->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)
{
@@ -137,6 +208,12 @@ int encapsulation(struct rte_mbuf *m, uint8_t vport_id)
/* outer IP checksum */
ol_flags |= PKT_TX_OUTER_IP_CKSUM;
ip->hdr_checksum = 0;
+ if (tx_checksum) {
+ ol_flags |= process_inner_cksums(phdr, &info);
+ m->l2_len = info.l2_len;
+ m->l3_len = info.l3_len;
+ m->l2_len += ETHER_VXLAN_HLEN;
+ }
m->outer_l2_len = sizeof(struct ether_hdr);
m->outer_l3_len = sizeof(struct ipv4_hdr);
--
1.7.7.6
