[dpdk-dev] [PATCH RFC 10/10] examples/tep_termination:add the configuration for encapsulation and the decapsulation

[Jijiang Liu <jijiang.liu@intel.com>]

The two flags by default are enabled, but sometimes we want to know the performance influence due to encapsulation and decapsulation operations, and
I think we should add the two options. 

Signed-off-by: Jijiang Liu <jijiang.liu@intel.com>
---
 examples/tep_termination/main.c        |   36 ++++++++++++++++++++++++++++++-
 examples/tep_termination/vxlan_setup.c |    8 +++++-
 2 files changed, 40 insertions(+), 4 deletions(-)

diff --git a/examples/tep_termination/main.c b/examples/tep_termination/main.c
index 8ce78ee..7d021f9 100644
--- a/examples/tep_termination/main.c
+++ b/examples/tep_termination/main.c
@@ -125,6 +125,12 @@ uint8_t tx_checksum;
 /* TSO segment size */
 uint16_t tso_segsz = 0;
 
+/* enable/disable decapsulation */
+uint8_t rx_decap = 1;
+
+/* enable/disable encapsulation */
+uint8_t tx_encap = 1;
+
 /* RX filter type for tunneling packet */
 uint8_t filter_idx;
 
@@ -250,6 +256,8 @@ vep_termination_usage(const char *prgname)
 	"		--nb-devices: number of virtIO device\n"
 	"		--tx-checksum [0|1]: inner Tx checksum offload\n"
 	"		--tso-segsz [0-N]: TSO segment size\n"
+	"		--decap [0|1]: Decapsulation for tunneling packet\n"
+	"		--encap [0|1]: Encapsulation for tunneling packet\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"
@@ -276,6 +284,8 @@ tep_parse_args(int argc, char **argv)
 		{"nb-devices", required_argument, NULL, 0},
 		{"tx-checksum", required_argument, NULL, 0},
 		{"tso-segsz", required_argument, NULL, 0},
+		{"decap", required_argument, NULL, 0},
+		{"encap", required_argument, NULL, 0},
 		{"filter-type", required_argument, NULL, 0},
 		{"stats", required_argument, NULL, 0},
 		{"dev-basename", required_argument, NULL, 0},
@@ -325,8 +335,30 @@ tep_parse_args(int argc, char **argv)
 					return -1;
 				}
 			}
-			
-			if (!strncmp(long_option[option_index].name, "tx-checksum", MAX_LONG_OPT_SZ)) {
+
+			/* Enable/disable encapsulation on RX. */
+			if (!strncmp(long_option[option_index].name, "decap", MAX_LONG_OPT_SZ)) {
+				ret = parse_num_opt(optarg, 1);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for decapsulation [0|1]\n");
+					vep_termination_usage(prgname);
+					return -1;
+				} else
+					rx_decap = ret;
+			}
+
+			/* Enable/disable encapsulation on TX. */
+			if (!strncmp(long_option[option_index].name, "encap", MAX_LONG_OPT_SZ)) {
+				ret = parse_num_opt(optarg, 1);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for encapsulation [0|1]\n");
+					vep_termination_usage(prgname);
+					return -1;
+				} else
+					tx_encap = ret;
+			}
+
+			 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");
diff --git a/examples/tep_termination/vxlan_setup.c b/examples/tep_termination/vxlan_setup.c
index 312a878..b4e8fbc 100644
--- a/examples/tep_termination/vxlan_setup.c
+++ b/examples/tep_termination/vxlan_setup.c
@@ -83,6 +83,8 @@ extern uint16_t num_devices;
 extern uint16_t udp_port;
 extern uint8_t ports[RTE_MAX_ETHPORTS];
 extern uint8_t filter_idx;
+extern uint8_t rx_decap;
+extern uint8_t tx_encap;
 
 /* ethernet addresses of ports */
 extern struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
@@ -237,7 +239,8 @@ vxlan_rx_process(struct rte_mbuf *pkt)
 		| PKT_RX_TUNNEL_IPV6_HDR)) == 0)
 		return -1;
 
-	ret = decapsulation(pkt);
+	if(rx_decap)
+		ret = decapsulation(pkt);
 
 	return ret;
 }
@@ -252,7 +255,8 @@ vxlan_tx_process(uint8_t vport_id, struct rte_mbuf *pkt)
 		return -1;
 	}
 
-	ret = encapsulation(pkt, vport_id);
+	if (tx_encap)
+		ret = encapsulation(pkt, vport_id);
 
 	return ret;
 }
-- 
1.7.7.6