[dpdk-dev] [PATCH v8 3/4] app/testpmd: add dedicated flow command parsing routine

[Viacheslav Ovsiienko <viacheslavo@nvidia.com>]

From: Gregory Etelson <getelson@nvidia.com>

testpmd flow creation is constructed from these procedures:
  1. receive string with flow rule description;
  2. parse input string and build flow parameters: port_id value,
     flow attributes, items array, actions array;
  3. create a flow rule from flow rule parameters.

Flow rule creation procedures are built as a pipeline. A new
procedure starts immediately after successful predecessor completion.
Due to this we have no dedicated routines providing intermediate
results for step 1-3 above.

The patch adds `flow_parse()` function call. It parses input string
and provides a caller with parsed data. This is a preparation step
for introducing flex item command processing.

Signed-off-by: Gregory Etelson <getelson@nvidia.com>
Reviewed-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 app/test-pmd/cmdline_flow.c | 24 ++++++++++++++++++++++++
 app/test-pmd/testpmd.h      |  5 +++++
 2 files changed, 29 insertions(+)

diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index a90822b660..cd640b9b7a 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -8076,6 +8076,30 @@ cmd_flow_parse(cmdline_parse_token_hdr_t *hdr, const char *src, void *result,
 	return len;
 }
 
+int
+flow_parse(const char *src, void *result, unsigned int size,
+	   struct rte_flow_attr **attr,
+	   struct rte_flow_item **pattern, struct rte_flow_action **actions)
+{
+	int ret;
+	struct context saved_flow_ctx = cmd_flow_context;
+
+	cmd_flow_context_init(&cmd_flow_context);
+	do {
+		ret = cmd_flow_parse(NULL, src, result, size);
+		if (ret > 0) {
+			src += ret;
+			while (isspace(*src))
+				src++;
+		}
+	} while (ret > 0 && strlen(src));
+	cmd_flow_context = saved_flow_ctx;
+	*attr = &((struct buffer *)result)->args.vc.attr;
+	*pattern = ((struct buffer *)result)->args.vc.pattern;
+	*actions = ((struct buffer *)result)->args.vc.actions;
+	return (ret >= 0 && !strlen(src)) ? 0 : -1;
+}
+
 /** Return number of completion entries (cmdline API). */
 static int
 cmd_flow_complete_get_nb(cmdline_parse_token_hdr_t *hdr)
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index dd8f27a296..81be754605 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -1047,6 +1047,11 @@ void add_tx_dynf_callback(portid_t portid);
 void remove_tx_dynf_callback(portid_t portid);
 int update_mtu_from_frame_size(portid_t portid, uint32_t max_rx_pktlen);
 
+extern int flow_parse(const char *src, void *result, unsigned int size,
+		      struct rte_flow_attr **attr,
+		      struct rte_flow_item **pattern,
+		      struct rte_flow_action **actions);
+
 /*
  * Work-around of a compilation error with ICC on invocations of the
  * rte_be_to_cpu_16() function.
-- 
2.18.1