app/testpmd: add flow command parsing routine

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>

diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index a90822b..cd640b9 100644 (file)
--- 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 dd8f27a..81be754 100644 (file)
--- 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.