1 files changed, 132 insertions, 0 deletions
diff --git a/extras/emacs/pipe-skel.el b/extras/emacs/pipe-skel.el
new file mode 100644
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+++ b/extras/emacs/pipe-skel.el
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+;;; pipe-skel.el - pipelined graph node skeleton
+
+(require 'skeleton)
+
+(define-skeleton skel-pipeline-node
+"Insert a skeleton pipelined graph node"
+nil
+'(setq node-name (skeleton-read "Node Name: "))
+'(setq uc-node-name (upcase node-name))
+'(setq nstages (skeleton-read "Number of pipeline stages: "))
+"
+#include <vlib/vlib.h>
+#include <vppinfra/error.h>
+
+/*
+ * Dump these counters via the \"show error\" CLI command 
+ * FIXME: Add packet counter / error strings as desired
+ */
+
+#define foreach_" node-name "_error \\
+_(ERROR1, \"sample counter/ error string\")
+
+static char * " node-name "_error_strings[] = {
+#define _(sym,string) string,
+  foreach_" node-name "_error
+#undef _
+};
+
+/*
+ * packet error / counter enumeration
+ *
+ * To count and drop a vlib_buffer_t *b:
+ *
+ *     Set b->error = node->errors[" uc-node-name "_ERROR_xxx];
+ *     last_stage returns a disposition index bound to \"error-drop\"
+ * 
+ * To manually increment the specific counter " uc-node-name "_ERROR1
+ *
+ *  vlib_node_t *n = vlib_get_node (vm, " node-name ".index);
+ *  u32 node_counter_base_index = n->error_heap_index;
+ *  vlib_error_main_t * em = &vm->error_main;
+ *  em->counters[node_counter_base_index + " uc-node-name "_ERROR1] += 1;
+ * 
+ */
+
+typedef enum {
+#define _(sym,str) " uc-node-name "_ERROR_##sym,
+    foreach_" node-name "_error
+#undef _
+    " uc-node-name "_N_ERROR,
+} " node-name "_error_t;
+
+/*
+ * enumeration of per-packet dispositions
+ * FIXME: add dispositions as desired
+ */
+
+typedef enum { \n"
+"    " uc-node-name "_NEXT_NORMAL,\n"
+"    " uc-node-name "_N_NEXT,
+} " node-name "_next_t;
+
+#define NSTAGES " nstages "
+
+/* 
+ * Use the generic buffer metadata + first line of packet data prefetch
+ * stage function from <api/pipeline.h>. This is usually a Good Idea.
+ */
+#define stage0 generic_stage0
+
+/* 
+ * FIXME: add stage functions. Here is the function prototype:
+ * 
+ * static inline void stageN (vlib_main_t * vm,
+ *                            vlib_node_runtime_t * node,
+ *                            u32 buffer_index)
+ */
+
+/*
+ * FIXME: the last pipeline stage returns the desired pkt next node index,
+ * from the " node-name "_next_t enum above
+ */
+static inline u32 last_stage (vlib_main_t *vm, vlib_node_runtime_t *node,
+                              u32 bi)
+{
+    vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+
+    b->error = node->errors[EXAMPLE_ERROR_ERROR1];
+
+    return " uc-node-name "_NEXT_NORMAL;
+}
+
+#include <api/pipeline.h>
+
+static uword " node-name "_node_fn (vlib_main_t * vm,
+                              vlib_node_runtime_t * node,
+                              vlib_frame_t * frame)
+{
+    return dispatch_pipeline (vm, node, frame);
+}
+
+static VLIB_REGISTER_NODE (example_node) = {
+  .function = " node-name "_node_fn,
+  .name = \"" node-name "-node\",
+  .vector_size = sizeof (u32),
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  
+  .n_errors = ARRAY_LEN(" node-name "_error_strings),
+  .error_strings = " node-name "_error_strings,
+
+  .n_next_nodes = " uc-node-name "_N_NEXT,
+
+  /* edit / add dispositions here */
+  .next_nodes = {
+        [" uc-node-name "_NEXT_NORMAL] = \"error-drop\",
+  },
+};
+
+/* 
+ * packet generator definition to push superframes of data into the
+ * new graph node. Cut and paste into <file>, then
+ * \"exec <file>\", \"pa enable test\" at the QVNET prompt...
+ * 
+packet-generator new {
+  name test
+  limit 100
+  node " node-name "-node
+  size 374-374
+  data { hex 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 }
+}
+ */
+")