[dpdk-dev] [RFC 2/2] app/testpmd: support VXLAN last 8-bits field matching

[rongwei liu]

Add a new testpmd pattern field 'last_rsvd' that supports the
last 8-bits matching of VXLAN header.

The examples for the "last_rsvd" pattern field are as below:

1. ...pattern eth / ipv4 / udp / vxlan last_rsvd is 0x80 / end ...

This flow will exactly match the last 8-bits to be 0x80.

2. ...pattern eth / ipv4 / udp / vxlan last_rsvd spec 0x80
vxlan mask 0x80 / end ...

This flow will only match the MSB of the last 8-bits to be 1.

Signed-off-by: rongwei liu <rongweil at nvidia.com>
---
 app/test-pmd/cmdline_flow.c                 | 9 +++++++++
 app/test-pmd/util.c                         | 5 +++--
 doc/guides/testpmd_app_ug/testpmd_funcs.rst | 1 +
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index 1c587bb7b8..6e76a625ca 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -207,6 +207,7 @@ enum index {
 	ITEM_SCTP_CKSUM,
 	ITEM_VXLAN,
 	ITEM_VXLAN_VNI,
+	ITEM_VXLAN_LAST_RSVD,
 	ITEM_E_TAG,
 	ITEM_E_TAG_GRP_ECID_B,
 	ITEM_NVGRE,
@@ -1129,6 +1130,7 @@ static const enum index item_sctp[] = {
 
 static const enum index item_vxlan[] = {
 	ITEM_VXLAN_VNI,
+	ITEM_VXLAN_LAST_RSVD,
 	ITEM_NEXT,
 	ZERO,
 };
@@ -2806,6 +2808,13 @@ static const struct token token_list[] = {
 		.next = NEXT(item_vxlan, NEXT_ENTRY(UNSIGNED), item_param),
 		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_vxlan, vni)),
 	},
+	[ITEM_VXLAN_LAST_RSVD] = {
+		.name = "last_rsvd",
+		.help = "VXLAN last reserved bits",
+		.next = NEXT(item_vxlan, NEXT_ENTRY(UNSIGNED), item_param),
+		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_vxlan,
+					     rsvd1)),
+	},
 	[ITEM_E_TAG] = {
 		.name = "e_tag",
 		.help = "match E-Tag header",
diff --git a/app/test-pmd/util.c b/app/test-pmd/util.c
index a9e431a8b2..59626518d5 100644
--- a/app/test-pmd/util.c
+++ b/app/test-pmd/util.c
@@ -266,8 +266,9 @@ dump_pkt_burst(uint16_t port_id, uint16_t queue, struct rte_mbuf *pkts[],
 				vx_vni = rte_be_to_cpu_32(vxlan_hdr->vx_vni);
 				MKDUMPSTR(print_buf, buf_size, cur_len,
 					  " - VXLAN packet: packet type =%d, "
-					  "Destination UDP port =%d, VNI = %d",
-					  packet_type, udp_port, vx_vni >> 8);
+					  "Destination UDP port =%d, VNI = %d, "
+					  "last_rsvd = %d", packet_type,
+					  udp_port, vx_vni >> 8, vx_vni & 0xff);
 			}
 		}
 		MKDUMPSTR(print_buf, buf_size, cur_len,
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 33857acf54..4ca3103067 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -3694,6 +3694,7 @@ This section lists supported pattern items and their attributes, if any.
 - ``vxlan``: match VXLAN header.
 
   - ``vni {unsigned}``: VXLAN identifier.
+  - ``last_rsvd {unsigned}``: VXLAN last reserved 8-bits.
 
 - ``e_tag``: match IEEE 802.1BR E-Tag header.
 
-- 
2.27.0