From: Gregory Etelson <getelson@nvidia.com>
Date: Tue, 13 Jul 2021 07:29:25 +0000 (+0300)
Subject: app/testpmd: add flow matching on IPv4 version and IHL
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=730bf0665228729c49f5a05e4f4f95123c0338c6;p=dpdk.git

app/testpmd: add flow matching on IPv4 version and IHL

The new flow item allows PMD to offload IPv4 IHL field for matching,
if hardware supports that operation.

Signed-off-by: Gregory Etelson <getelson@nvidia.com>
Reviewed-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---

diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index 8fc0e1469d..34e043621c 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -171,6 +171,7 @@ enum index {
 	ITEM_VLAN_INNER_TYPE,
 	ITEM_VLAN_HAS_MORE_VLAN,
 	ITEM_IPV4,
+	ITEM_IPV4_VER_IHL,
 	ITEM_IPV4_TOS,
 	ITEM_IPV4_ID,
 	ITEM_IPV4_FRAGMENT_OFFSET,
@@ -1069,6 +1070,7 @@ static const enum index item_vlan[] = {
 };
 
 static const enum index item_ipv4[] = {
+	ITEM_IPV4_VER_IHL,
 	ITEM_IPV4_TOS,
 	ITEM_IPV4_ID,
 	ITEM_IPV4_FRAGMENT_OFFSET,
@@ -2576,6 +2578,14 @@ static const struct token token_list[] = {
 		.next = NEXT(item_ipv4),
 		.call = parse_vc,
 	},
+	[ITEM_IPV4_VER_IHL] = {
+		.name = "version_ihl",
+		.help = "match header length",
+		.next = NEXT(item_ipv4, NEXT_ENTRY(COMMON_UNSIGNED),
+			     item_param),
+		.args = ARGS(ARGS_ENTRY(struct rte_flow_item_ipv4,
+				     hdr.version_ihl)),
+	},
 	[ITEM_IPV4_TOS] = {
 		.name = "tos",
 		.help = "type of service",
@@ -8193,7 +8203,8 @@ update_fields(uint8_t *buf, struct rte_flow_item *item, uint16_t next_proto)
 		break;
 	case RTE_FLOW_ITEM_TYPE_IPV4:
 		ipv4 = (struct rte_ipv4_hdr *)buf;
-		ipv4->version_ihl = 0x45;
+		if (!ipv4->version_ihl)
+			ipv4->version_ihl = RTE_IPV4_VHL_DEF;
 		if (next_proto && ipv4->next_proto_id == 0)
 			ipv4->next_proto_id = (uint8_t)next_proto;
 		break;
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 33857acf54..ab7e91ad6c 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -3654,6 +3654,7 @@ This section lists supported pattern items and their attributes, if any.
 
 - ``ipv4``: match IPv4 header.
 
+  - ``version_ihl {unsigned}``: IPv4 version and IP header length.
   - ``tos {unsigned}``: type of service.
   - ``ttl {unsigned}``: time to live.
   - ``proto {unsigned}``: next protocol ID.