GBP V2

update the GBP plugin to implement the full NAT feature set of opflex agent

Change-Id: Ic06a039c889445ed0b9087fa1f292634192b0f8d
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>

1 files changed, 276 insertions, 0 deletions

diff --git a/src/plugins/gbp/gbp_classify.c b/src/plugins/gbp/gbp_classify.c
new file mode 100644
index 00000000000..859d4f95173
--- /dev/null
+++ b/src/plugins/gbp/gbp_classify.c
@@ -0,0 +1,276 @@
+/*
+ * gbp.h : Group Based Policy
+ *
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <plugins/gbp/gbp.h>
+
+typedef enum gbp_src_classify_type_t_
+{
+  GBP_SRC_CLASSIFY_NULL,
+  GBP_SRC_CLASSIFY_PORT,
+} gbp_src_classify_type_t;
+
+#define GBP_SRC_N_CLASSIFY (GBP_SRC_CLASSIFY_PORT + 1)
+
+/**
+ * Grouping of global data for the GBP source EPG classification feature
+ */
+typedef struct gbp_src_classify_main_t_
+{
+  /**
+   * Next nodes for L2 output features
+   */
+  u32 l2_input_feat_next[GBP_SRC_N_CLASSIFY][32];
+} gbp_src_classify_main_t;
+
+static gbp_src_classify_main_t gbp_src_classify_main;
+
+/**
+ * per-packet trace data
+ */
+typedef struct gbp_classify_trace_t_
+{
+  /* per-pkt trace data */
+  epg_id_t src_epg;
+} gbp_classify_trace_t;
+
+/*
+ * determine the SRC EPG form the input port
+ */
+always_inline uword
+gbp_classify_inline (vlib_main_t * vm,
+		     vlib_node_runtime_t * node,
+		     vlib_frame_t * frame,
+		     gbp_src_classify_type_t type, u8 is_l3)
+{
+  gbp_src_classify_main_t *gscm = &gbp_src_classify_main;
+  u32 n_left_from, *from, *to_next;
+  u32 next_index;
+
+  next_index = 0;
+  n_left_from = frame->n_vectors;
+  from = vlib_frame_vector_args (frame);
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 next0, bi0, src_epg, sw_if_index0;
+	  vlib_buffer_t *b0;
+
+	  bi0 = from[0];
+	  to_next[0] = bi0;
+	  from += 1;
+	  to_next += 1;
+	  n_left_from -= 1;
+	  n_left_to_next -= 1;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+
+	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+	  if (GBP_SRC_CLASSIFY_NULL == type)
+	    {
+	      src_epg = ~0;
+	      next0 =
+		vnet_l2_feature_next (b0, gscm->l2_input_feat_next[type],
+				      L2INPUT_FEAT_GBP_NULL_CLASSIFY);
+	    }
+	  else
+	    {
+	      src_epg = gbp_port_to_epg (sw_if_index0);
+	      if (is_l3)
+		{
+		  /*
+		   * Go straight to looukp, do not pass go, do not collect $200
+		   */
+		  next0 = 0;
+		}
+	      else
+		{
+		  next0 =
+		    vnet_l2_feature_next (b0, gscm->l2_input_feat_next[type],
+					  L2INPUT_FEAT_GBP_SRC_CLASSIFY);
+		}
+	    }
+
+	  vnet_buffer2 (b0)->gbp.src_epg = src_epg;
+
+	  if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      gbp_classify_trace_t *t =
+		vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->src_epg = src_epg;
+	    }
+
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, next0);
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  return frame->n_vectors;
+}
+
+static uword
+gbp_src_classify (vlib_main_t * vm,
+		  vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_classify_inline (vm, node, frame, GBP_SRC_CLASSIFY_PORT, 0));
+}
+
+static uword
+gbp_null_classify (vlib_main_t * vm,
+		   vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_classify_inline (vm, node, frame, GBP_SRC_CLASSIFY_NULL, 0));
+}
+
+static uword
+gbp_ip4_src_classify (vlib_main_t * vm,
+		      vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_classify_inline (vm, node, frame, 0, 1));
+}
+
+static uword
+gbp_ip6_src_classify (vlib_main_t * vm,
+		      vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_classify_inline (vm, node, frame, 0, 1));
+}
+
+
+/* packet trace format function */
+static u8 *
+format_gbp_classify_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  gbp_classify_trace_t *t = va_arg (*args, gbp_classify_trace_t *);
+
+  s = format (s, "src-epg:%d", t->src_epg);
+
+  return s;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (gbp_null_classify_node) = {
+  .function = gbp_null_classify,
+  .name = "gbp-null-classify",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_classify_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = 0,
+  .n_next_nodes = 0,
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (gbp_null_classify_node, gbp_null_classify);
+
+VLIB_REGISTER_NODE (gbp_src_classify_node) = {
+  .function = gbp_src_classify,
+  .name = "gbp-src-classify",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_classify_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = 0,
+  .n_next_nodes = 0,
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (gbp_src_classify_node, gbp_src_classify);
+
+VLIB_REGISTER_NODE (gbp_ip4_src_classify_node) = {
+  .function = gbp_ip4_src_classify,
+  .name = "ip4-gbp-src-classify",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_classify_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = 0,
+  .n_next_nodes = 1,
+  .next_nodes = {
+    [0] = "ip4-lookup"
+  },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (gbp_ip4_src_classify_node, gbp_ip4_src_classify);
+
+VLIB_REGISTER_NODE (gbp_ip6_src_classify_node) = {
+  .function = gbp_ip6_src_classify,
+  .name = "ip6-gbp-src-classify",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_classify_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = 0,
+  .n_next_nodes = 1,
+  .next_nodes = {
+    [0] = "ip6-lookup"
+  },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (gbp_ip6_src_classify_node, gbp_ip6_src_classify);
+
+VNET_FEATURE_INIT (gbp_ip4_src_classify_feat_node, static) =
+{
+  .arc_name = "ip4-unicast",
+  .node_name = "ip4-gbp-src-classify",
+  .runs_before = VNET_FEATURES ("nat44-out2in"),
+};
+VNET_FEATURE_INIT (gbp_ip6_src_classify_feat_node, static) =
+{
+  .arc_name = "ip6-unicast",
+  .node_name = "ip6-gbp-src-classify",
+  .runs_before = VNET_FEATURES ("nat66-out2in"),
+};
+
+static clib_error_t *
+gbp_src_classify_init (vlib_main_t * vm)
+{
+  gbp_src_classify_main_t *em = &gbp_src_classify_main;
+
+  /* Initialize the feature next-node indexes */
+  feat_bitmap_init_next_nodes (vm,
+			       gbp_src_classify_node.index,
+			       L2INPUT_N_FEAT,
+			       l2input_get_feat_names (),
+			       em->l2_input_feat_next[GBP_SRC_CLASSIFY_NULL]);
+  feat_bitmap_init_next_nodes (vm,
+			       gbp_null_classify_node.index,
+			       L2INPUT_N_FEAT,
+			       l2input_get_feat_names (),
+			       em->l2_input_feat_next[GBP_SRC_CLASSIFY_PORT]);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (gbp_src_classify_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */