GBP: Sclass to src-epg conversions

Change-Id: Ica88268fd6a6ee01da7e9219bb4e81f22ed2fd4b
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 386 insertions, 0 deletions

diff --git a/src/plugins/gbp/gbp_sclass.c b/src/plugins/gbp/gbp_sclass.c
new file mode 100644
index 00000000000..10ecf1fa42e
--- /dev/null
+++ b/src/plugins/gbp/gbp_sclass.c
@@ -0,0 +1,386 @@
+/*
+ * 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>
+#include <vnet/l2/l2_input.h>
+#include <vnet/l2/l2_output.h>
+
+/**
+ * Grouping of global data for the GBP source EPG classification feature
+ */
+typedef struct gbp_sclass_main_t_
+{
+  /**
+   * Next nodes for L2 output features
+   */
+  u32 gel_l2_input_feat_next[32];
+  u32 gel_l2_output_feat_next[32];
+} gbp_sclass_main_t;
+
+static gbp_sclass_main_t gbp_sclass_main;
+
+#define foreach_gbp_sclass                      \
+  _(DROP,    "drop")
+
+
+typedef enum
+{
+#define _(sym,str) GBP_SCLASS_NEXT_##sym,
+  foreach_gbp_sclass
+#undef _
+    GBP_SCLASS_N_NEXT,
+} gbp_sclass_next_t;
+
+typedef struct gbp_sclass_trace_t_
+{
+  /* per-pkt trace data */
+  u32 epg;
+  u32 sclass;
+} gbp_sclass_trace_t;
+
+always_inline uword
+gbp_sclass_inline (vlib_main_t * vm,
+		   vlib_node_runtime_t * node,
+		   vlib_frame_t * frame, int is_id_2_sclass, int is_l2)
+{
+  u32 n_left_from, *from, *to_next, next_index;
+  gbp_sclass_main_t *glm;
+
+  glm = &gbp_sclass_main;
+  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)
+	{
+	  gbp_sclass_next_t next0;
+	  vlib_buffer_t *b0;
+	  epg_id_t epg0;
+	  u16 sclass0;
+	  u32 bi0;
+
+	  next0 = GBP_SCLASS_NEXT_DROP;
+	  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);
+
+	  if (is_id_2_sclass)
+	    {
+	      // output direction - convert from the SRC-EPD to the sclass
+	      gbp_endpoint_group_t *gg;
+
+	      epg0 = vnet_buffer2 (b0)->gbp.src_epg;
+	      gg = gbp_epg_get (epg0);
+
+	      if (NULL != gg)
+		{
+		  sclass0 = vnet_buffer2 (b0)->gbp.sclass = gg->gg_sclass;
+		  if (is_l2)
+		    next0 =
+		      vnet_l2_feature_next (b0, glm->gel_l2_output_feat_next,
+					    L2OUTPUT_FEAT_GBP_ID_2_SCLASS);
+		  else
+		    vnet_feature_next (&next0, b0);
+		}
+	      else
+		sclass0 = 0;
+	    }
+	  else
+	    {
+	      /* input direction - convert from the sclass to the SRC-EGD */
+	      sclass0 = vnet_buffer2 (b0)->gbp.sclass;
+	      vnet_buffer2 (b0)->gbp.src_epg =
+		gbp_epg_sclass_2_id (vnet_buffer2 (b0)->gbp.sclass);
+	      epg0 = vnet_buffer2 (b0)->gbp.src_epg;
+
+	      if (EPG_INVALID != epg0)
+		{
+		  if (is_l2)
+		    next0 =
+		      vnet_l2_feature_next (b0, glm->gel_l2_input_feat_next,
+					    L2INPUT_FEAT_GBP_SCLASS_2_ID);
+		  else
+		    vnet_feature_next (&next0, b0);
+		}
+	    }
+
+	  if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      gbp_sclass_trace_t *t =
+		vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->epg = epg0;
+	      t->sclass = sclass0;
+	    }
+
+	  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;
+}
+
+always_inline uword
+l2_gbp_id_2_sclass (vlib_main_t * vm,
+		    vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_sclass_inline (vm, node, frame, 1, 1));
+}
+
+always_inline uword
+l2_gbp_sclass_2_id (vlib_main_t * vm,
+		    vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_sclass_inline (vm, node, frame, 0, 1));
+}
+
+always_inline uword
+ip4_gbp_id_2_sclass (vlib_main_t * vm,
+		     vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_sclass_inline (vm, node, frame, 1, 0));
+}
+
+always_inline uword
+ip4_gbp_sclass_2_id (vlib_main_t * vm,
+		     vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_sclass_inline (vm, node, frame, 0, 0));
+}
+
+always_inline uword
+ip6_gbp_id_2_sclass (vlib_main_t * vm,
+		     vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_sclass_inline (vm, node, frame, 1, 0));
+}
+
+always_inline uword
+ip6_gbp_sclass_2_id (vlib_main_t * vm,
+		     vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (gbp_sclass_inline (vm, node, frame, 0, 0));
+}
+
+/* packet trace format function */
+static u8 *
+format_gbp_sclass_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_sclass_trace_t *t = va_arg (*args, gbp_sclass_trace_t *);
+
+  s = format (s, "epg:%d sclass:%d", t->epg, t->sclass);
+
+  return s;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (l2_gbp_id_2_sclass_node) = {
+  .function = l2_gbp_id_2_sclass,
+  .name = "l2-gbp-id-2-sclass",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_sclass_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_next_nodes = GBP_SCLASS_N_NEXT,
+
+  .next_nodes = {
+    [GBP_SCLASS_NEXT_DROP] = "error-drop",
+  },
+};
+VLIB_REGISTER_NODE (l2_gbp_sclass_2_id_node) = {
+  .function = l2_gbp_sclass_2_id,
+  .name = "l2-gbp-sclass-2-id",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_sclass_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_next_nodes = GBP_SCLASS_N_NEXT,
+
+  .next_nodes = {
+    [GBP_SCLASS_NEXT_DROP] = "error-drop",
+  },
+};
+
+VLIB_REGISTER_NODE (ip4_gbp_id_2_sclass_node) = {
+  .function = ip4_gbp_id_2_sclass,
+  .name = "ip4-gbp-id-2-sclass",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_sclass_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_next_nodes = GBP_SCLASS_N_NEXT,
+
+  .next_nodes = {
+    [GBP_SCLASS_NEXT_DROP] = "error-drop",
+  },
+};
+VLIB_REGISTER_NODE (ip4_gbp_sclass_2_id_node) = {
+  .function = ip4_gbp_sclass_2_id,
+  .name = "ip4-gbp-sclass-2-id",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_sclass_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_next_nodes = GBP_SCLASS_N_NEXT,
+
+  .next_nodes = {
+    [GBP_SCLASS_NEXT_DROP] = "error-drop",
+  },
+};
+
+VLIB_REGISTER_NODE (ip6_gbp_id_2_sclass_node) = {
+  .function = ip6_gbp_id_2_sclass,
+  .name = "ip6-gbp-id-2-sclass",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_sclass_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_next_nodes = GBP_SCLASS_N_NEXT,
+
+  .next_nodes = {
+    [GBP_SCLASS_NEXT_DROP] = "error-drop",
+  },
+};
+VLIB_REGISTER_NODE (ip6_gbp_sclass_2_id_node) = {
+  .function = ip6_gbp_sclass_2_id,
+  .name = "ip6-gbp-sclass-2-id",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_sclass_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_next_nodes = GBP_SCLASS_N_NEXT,
+
+  .next_nodes = {
+    [GBP_SCLASS_NEXT_DROP] = "error-drop",
+  },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (l2_gbp_id_2_sclass_node, l2_gbp_id_2_sclass);
+VLIB_NODE_FUNCTION_MULTIARCH (l2_gbp_sclass_2_id_node, l2_gbp_sclass_2_id);
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_gbp_id_2_sclass_node, ip4_gbp_id_2_sclass);
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_gbp_sclass_2_id_node, ip4_gbp_sclass_2_id);
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_gbp_id_2_sclass_node, ip6_gbp_id_2_sclass);
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_gbp_sclass_2_id_node, ip6_gbp_sclass_2_id);
+
+VNET_FEATURE_INIT (ip4_gbp_sclass_2_id_feat, static) =
+{
+  .arc_name = "ip4-unicast",
+  .node_name = "ip4-gbp-sclass-2-id",
+  .runs_before = VNET_FEATURES ("gbp-learn-ip4"),
+};
+VNET_FEATURE_INIT (ip6_gbp_sclass_2_id_feat, static) =
+{
+  .arc_name = "ip6-unicast",
+  .node_name = "ip6-gbp-sclass-2-id",
+  .runs_before = VNET_FEATURES ("gbp-learn-ip6"),
+};
+VNET_FEATURE_INIT (ip4_gbp_id_2_sclass_feat, static) =
+{
+  .arc_name = "ip4-output",
+  .node_name = "ip4-gbp-id-2-sclass",
+};
+VNET_FEATURE_INIT (ip6_gbp_id_2_sclass_feat, static) =
+{
+  .arc_name = "ip6-output",
+  .node_name = "ip6-gbp-id-2-sclass",
+};
+/* *INDENT-ON* */
+
+void
+gbp_sclass_enable_l2 (u32 sw_if_index)
+{
+  l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_GBP_SCLASS_2_ID, 1);
+  l2output_intf_bitmap_enable (sw_if_index, L2OUTPUT_FEAT_GBP_ID_2_SCLASS, 1);
+}
+
+void
+gbp_sclass_disable_l2 (u32 sw_if_index)
+{
+  l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_GBP_SCLASS_2_ID, 0);
+  l2output_intf_bitmap_enable (sw_if_index, L2OUTPUT_FEAT_GBP_ID_2_SCLASS, 0);
+}
+
+void
+gbp_sclass_enable_ip (u32 sw_if_index)
+{
+  vnet_feature_enable_disable ("ip4-unicast",
+			       "ip4-gbp-sclass-2-id", sw_if_index, 1, 0, 0);
+  vnet_feature_enable_disable ("ip6-unicast",
+			       "ip6-gbp-sclass-2-id", sw_if_index, 1, 0, 0);
+  vnet_feature_enable_disable ("ip4-output",
+			       "ip4-gbp-id-2-sclass", sw_if_index, 1, 0, 0);
+  vnet_feature_enable_disable ("ip6-output",
+			       "ip6-gbp-id-2-sclass", sw_if_index, 1, 0, 0);
+}
+
+void
+gbp_sclass_disable_ip (u32 sw_if_index)
+{
+  vnet_feature_enable_disable ("ip4-unicast",
+			       "ip4-gbp-sclass-2-id", sw_if_index, 0, 0, 0);
+  vnet_feature_enable_disable ("ip6-unicast",
+			       "ip6-gbp-sclass-2-id", sw_if_index, 0, 0, 0);
+  vnet_feature_enable_disable ("ip4-output",
+			       "ip4-gbp-id-2-sclass", sw_if_index, 0, 0, 0);
+  vnet_feature_enable_disable ("ip6-output",
+			       "ip6-gbp-id-2-sclass", sw_if_index, 0, 0, 0);
+}
+
+static clib_error_t *
+gbp_sclass_init (vlib_main_t * vm)
+{
+  gbp_sclass_main_t *glm = &gbp_sclass_main;
+
+  /* Initialize the feature next-node indices */
+  feat_bitmap_init_next_nodes (vm,
+			       l2_gbp_sclass_2_id_node.index,
+			       L2INPUT_N_FEAT,
+			       l2input_get_feat_names (),
+			       glm->gel_l2_input_feat_next);
+  feat_bitmap_init_next_nodes (vm,
+			       l2_gbp_id_2_sclass_node.index,
+			       L2OUTPUT_N_FEAT,
+			       l2output_get_feat_names (),
+			       glm->gel_l2_output_feat_next);
+
+  return (NULL);
+}
+
+VLIB_INIT_FUNCTION (gbp_sclass_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */