[dpdk-dev] [PATCH v3 4/4] app/testpmd: match GRE's key and present bits

[Xiaoyu Min <jackmin@mellanox.com>]

support matching on GRE key and present bits (C,K,S)

example testpmd command could be:
  testpmd>flow create 0 ingress group 1 pattern eth / ipv4 /
          gre crksv is 0x2000 crksv mask 0xb000 /
	  gre_key key is 0x12345678 / end
	  actions rss queues 1 0 end / mark id 196 / end

Which will match GRE packet with k present bit set and key value is
0x12345678.

Signed-off-by: Xiaoyu Min <jackmin@mellanox.com>
---
** This patch is based on patch [1]

[1] https://patches.dpdk.org/patch/55773/
---
 app/test-pmd/cmdline_flow.c                 | 32 +++++++++++++++++++++
 doc/guides/testpmd_app_ug/testpmd_funcs.rst |  4 +++
 2 files changed, 36 insertions(+)

diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index 201bd9de56..8504cc8bc1 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -148,6 +148,9 @@ enum index {
 	ITEM_MPLS_LABEL,
 	ITEM_GRE,
 	ITEM_GRE_PROTO,
+	ITEM_GRE_CRKSV,
+	ITEM_GRE_KEY,
+	ITEM_GRE_KEY_KEY,
 	ITEM_FUZZY,
 	ITEM_FUZZY_THRESH,
 	ITEM_GTP,
@@ -595,6 +598,7 @@ static const enum index next_item[] = {
 	ITEM_NVGRE,
 	ITEM_MPLS,
 	ITEM_GRE,
+	ITEM_GRE_KEY,
 	ITEM_FUZZY,
 	ITEM_GTP,
 	ITEM_GTPC,
@@ -755,6 +759,13 @@ static const enum index item_mpls[] = {
 
 static const enum index item_gre[] = {
 	ITEM_GRE_PROTO,
+	ITEM_GRE_CRKSV,
+	ITEM_NEXT,
+	ZERO,
+};
+
+static const enum index item_gre_key[] = {
+	ITEM_GRE_KEY_KEY,
 	ITEM_NEXT,
 	ZERO,
 };
@@ -1898,6 +1909,27 @@ static const struct token token_list[] = {
 		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_gre,
 					     protocol)),
 	},
+	[ITEM_GRE_CRKSV] = {
+		.name = "crksv",
+		.help = "GRE's first word (bit0 - bit15)",
+		.next = NEXT(item_gre, NEXT_ENTRY(UNSIGNED), item_param),
+		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_gre,
+					     c_rsvd0_ver)),
+	},
+	[ITEM_GRE_KEY] = {
+		.name = "gre_key",
+		.help = "match GRE Key",
+		.priv = PRIV_ITEM(GRE_KEY,
+				  sizeof(rte_be32_t)),
+		.next = NEXT(item_gre_key),
+		.call = parse_vc,
+	},
+	[ITEM_GRE_KEY_KEY] = {
+		.name = "key",
+		.help = "GRE key",
+		.next = NEXT(item_gre_key, NEXT_ENTRY(UNSIGNED), item_param),
+		.args = ARGS(ARG_ENTRY_HTON(rte_be32_t)),
+	},
 	[ITEM_FUZZY] = {
 		.name = "fuzzy",
 		.help = "fuzzy pattern match, expect faster than default",
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index cb83a3ce8a..fc3ba8a009 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -3804,6 +3804,10 @@ This section lists supported pattern items and their attributes, if any.
 
   - ``protocol {unsigned}``: protocol type.
 
+- ``gre_key``: match GRE optional key field.
+
+  - ``key {unsigned}``: key value.
+
 - ``fuzzy``: fuzzy pattern match, expect faster than default.
 
   - ``thresh {unsigned}``: accuracy threshold.
-- 
2.21.0