misc: deprecate gbp and its dependents

Type: improvement

Signed-off-by: Neale Ranns <nranns@cisco.com>
Signed-off-by: Benoît Ganne <bganne@cisco.com>
Change-Id: I2f30a4f04fd9a8635ce2d259b5fd5b0c85cee8c3

1 files changed, 341 insertions, 0 deletions

diff --git a/extras/deprecated/plugins/gbp/gbp_policy_node.c b/extras/deprecated/plugins/gbp/gbp_policy_node.c
new file mode 100644
index 00000000000..8c6ef5c2b94
--- /dev/null
+++ b/extras/deprecated/plugins/gbp/gbp_policy_node.c
@@ -0,0 +1,341 @@
+/*
+ * 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 <plugins/gbp/gbp_classify.h>
+#include <plugins/gbp/gbp_policy.h>
+#include <plugins/gbp/gbp_policy_dpo.h>
+#include <plugins/gbp/gbp_bridge_domain.h>
+#include <plugins/gbp/gbp_ext_itf.h>
+#include <plugins/gbp/gbp_contract.h>
+
+#include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
+#include <vnet/vxlan-gbp/vxlan_gbp.h>
+
+typedef enum
+{
+  GBP_POLICY_NEXT_DROP,
+  GBP_POLICY_N_NEXT,
+} gbp_policy_next_t;
+
+always_inline dpo_proto_t
+ethertype_to_dpo_proto (u16 etype)
+{
+  etype = clib_net_to_host_u16 (etype);
+
+  switch (etype)
+    {
+    case ETHERNET_TYPE_IP4:
+      return (DPO_PROTO_IP4);
+    case ETHERNET_TYPE_IP6:
+      return (DPO_PROTO_IP6);
+    }
+
+  return (DPO_PROTO_NONE);
+}
+
+always_inline u32
+gbp_rule_l2_redirect (const gbp_rule_t * gu, vlib_buffer_t * b0)
+{
+  const ethernet_header_t *eth0;
+  const dpo_id_t *dpo;
+  dpo_proto_t dproto;
+
+  eth0 = vlib_buffer_get_current (b0);
+  /* pop the ethernet header to prepare for L3 rewrite */
+  vlib_buffer_advance (b0, vnet_buffer (b0)->l2.l2_len);
+
+  dproto = ethertype_to_dpo_proto (eth0->type);
+  dpo = &gu->gu_dpo[GBP_POLICY_NODE_L2][dproto];
+
+  /* save the LB index for the next node and reset the IP flow hash
+   * so it's recalculated */
+  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
+  vnet_buffer (b0)->ip.flow_hash = 0;
+
+  return (dpo->dpoi_next_node);
+}
+
+static_always_inline gbp_policy_next_t
+gbp_policy_l2_feature_next (gbp_policy_main_t * gpm, vlib_buffer_t * b,
+			    const gbp_policy_type_t type)
+{
+  u32 feat_bit;
+
+  switch (type)
+    {
+    case GBP_POLICY_PORT:
+      feat_bit = L2OUTPUT_FEAT_GBP_POLICY_PORT;
+      break;
+    case GBP_POLICY_MAC:
+      feat_bit = L2OUTPUT_FEAT_GBP_POLICY_MAC;
+      break;
+    case GBP_POLICY_LPM:
+      feat_bit = L2OUTPUT_FEAT_GBP_POLICY_LPM;
+      break;
+    default:
+      return GBP_POLICY_NEXT_DROP;
+    }
+
+  return vnet_l2_feature_next (b, gpm->l2_output_feat_next[type], feat_bit);
+}
+
+static uword
+gbp_policy_inline (vlib_main_t * vm,
+		   vlib_node_runtime_t * node,
+		   vlib_frame_t * frame, const gbp_policy_type_t type)
+{
+  gbp_main_t *gm = &gbp_main;
+  gbp_policy_main_t *gpm = &gbp_policy_main;
+  u32 n_left_from, *from, *to_next;
+  u32 next_index;
+  u32 n_allow_intra, n_allow_a_bit, n_allow_sclass_1;
+
+  next_index = 0;
+  n_left_from = frame->n_vectors;
+  from = vlib_frame_vector_args (frame);
+  n_allow_intra = n_allow_a_bit = n_allow_sclass_1 = 0;
+
+  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_rule_action_t action0 = GBP_RULE_DENY;
+	  const ethernet_header_t *h0;
+	  const gbp_endpoint_t *ge0;
+	  gbp_contract_error_t err0;
+	  u32 acl_match = ~0, rule_match = ~0;
+	  gbp_policy_next_t next0;
+	  gbp_contract_key_t key0;
+	  u32 bi0, sw_if_index0;
+	  vlib_buffer_t *b0;
+	  gbp_rule_t *rule0;
+
+	  next0 = GBP_POLICY_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);
+	  h0 = vlib_buffer_get_current (b0);
+	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+
+	  /*
+	   * Reflection check; in and out on an ivxlan tunnel
+	   */
+	  if ((~0 != vxlan_gbp_tunnel_by_sw_if_index (sw_if_index0)) &&
+	      (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_R))
+	    {
+	      goto trace;
+	    }
+
+	  /*
+	   * If the A-bit is set then policy has already been applied
+	   * and we skip enforcement here.
+	   */
+	  if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_A)
+	    {
+	      next0 = gbp_policy_l2_feature_next (gpm, b0, type);
+	      n_allow_a_bit++;
+	      key0.as_u64 = ~0;
+	      goto trace;
+	    }
+
+	  /*
+	   * determine the src and dst EPG
+	   */
+
+	  /* zero out the key to ensure the pad space is clear */
+	  key0.as_u64 = 0;
+	  key0.gck_src = vnet_buffer2 (b0)->gbp.sclass;
+	  key0.gck_dst = SCLASS_INVALID;
+
+	  if (GBP_POLICY_LPM == type)
+	    {
+	      const ip4_address_t *ip4 = 0;
+	      const ip6_address_t *ip6 = 0;
+	      const dpo_proto_t proto =
+		gbp_classify_get_ip_address (h0, &ip4, &ip6,
+					     GBP_CLASSIFY_GET_IP_DST);
+	      if (PREDICT_TRUE (DPO_PROTO_NONE != proto))
+		{
+		  const gbp_ext_itf_t *ext_itf =
+		    gbp_ext_itf_get (sw_if_index0);
+		  const gbp_policy_dpo_t *gpd =
+		    gbp_classify_get_gpd (ip4, ip6,
+					  ext_itf->gx_fib_index[proto]);
+		  if (gpd)
+		    key0.gck_dst = gpd->gpd_sclass;
+		}
+	    }
+	  else
+	    {
+	      if (GBP_POLICY_PORT == type)
+		ge0 = gbp_endpoint_find_itf (sw_if_index0);
+	      else
+		ge0 = gbp_endpoint_find_mac (h0->dst_address,
+					     vnet_buffer (b0)->l2.bd_index);
+	      if (NULL != ge0)
+		key0.gck_dst = ge0->ge_fwd.gef_sclass;
+	    }
+
+	  if (SCLASS_INVALID == key0.gck_dst)
+	    {
+	      /* If you cannot determine the destination EP then drop */
+	      b0->error = node->errors[GBP_CONTRACT_ERROR_DROP_NO_DCLASS];
+	      goto trace;
+	    }
+
+	  key0.gck_src = vnet_buffer2 (b0)->gbp.sclass;
+	  if (SCLASS_INVALID == key0.gck_src)
+	    {
+	      /*
+	       * the src EPG is not set when the packet arrives on an EPG
+	       * uplink interface and we do not need to apply policy
+	       */
+	      next0 = gbp_policy_l2_feature_next (gpm, b0, type);
+	      goto trace;
+	    }
+
+	  key0.gck_scope =
+	    gbp_bridge_domain_get_scope (vnet_buffer (b0)->l2.bd_index);
+
+	  action0 =
+	    gbp_contract_apply (vm, gm, &key0, b0, &rule0, &n_allow_intra,
+				&n_allow_sclass_1, &acl_match, &rule_match,
+				&err0, GBP_CONTRACT_APPLY_L2);
+	  switch (action0)
+	    {
+	    case GBP_RULE_PERMIT:
+	      next0 = gbp_policy_l2_feature_next (gpm, b0, type);
+	      vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
+	      break;
+	    case GBP_RULE_REDIRECT:
+	      next0 = gbp_rule_l2_redirect (rule0, b0);
+	      vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
+	      break;
+	    case GBP_RULE_DENY:
+	      next0 = GBP_POLICY_NEXT_DROP;
+	      b0->error = node->errors[err0];
+	      break;
+	    }
+
+	trace:
+	  gbp_policy_trace (vm, node, b0, &key0, action0, acl_match,
+			    rule_match);
+
+	  /* verify speculative enqueue, maybe switch current next frame */
+	  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);
+    }
+
+  vlib_node_increment_counter (vm, node->node_index,
+			       GBP_CONTRACT_ERROR_ALLOW_INTRA, n_allow_intra);
+  vlib_node_increment_counter (vm, node->node_index,
+			       GBP_CONTRACT_ERROR_ALLOW_A_BIT, n_allow_a_bit);
+  vlib_node_increment_counter (vm, node->node_index,
+			       GBP_CONTRACT_ERROR_ALLOW_SCLASS_1,
+			       n_allow_sclass_1);
+
+  return frame->n_vectors;
+}
+
+VLIB_NODE_FN (gbp_policy_port_node) (vlib_main_t * vm,
+				     vlib_node_runtime_t * node,
+				     vlib_frame_t * frame)
+{
+  return (gbp_policy_inline (vm, node, frame, GBP_POLICY_PORT));
+}
+
+VLIB_NODE_FN (gbp_policy_mac_node) (vlib_main_t * vm,
+				    vlib_node_runtime_t * node,
+				    vlib_frame_t * frame)
+{
+  return (gbp_policy_inline (vm, node, frame, GBP_POLICY_MAC));
+}
+
+VLIB_NODE_FN (gbp_policy_lpm_node) (vlib_main_t * vm,
+				    vlib_node_runtime_t * node,
+				    vlib_frame_t * frame)
+{
+  return (gbp_policy_inline (vm, node, frame, GBP_POLICY_LPM));
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (gbp_policy_port_node) = {
+  .name = "gbp-policy-port",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_policy_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(gbp_contract_error_strings),
+  .error_strings = gbp_contract_error_strings,
+
+  .n_next_nodes = GBP_POLICY_N_NEXT,
+  .next_nodes = {
+    [GBP_POLICY_NEXT_DROP] = "error-drop",
+  },
+};
+
+VLIB_REGISTER_NODE (gbp_policy_mac_node) = {
+  .name = "gbp-policy-mac",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_policy_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(gbp_contract_error_strings),
+  .error_strings = gbp_contract_error_strings,
+
+  .n_next_nodes = GBP_POLICY_N_NEXT,
+  .next_nodes = {
+    [GBP_POLICY_NEXT_DROP] = "error-drop",
+  },
+};
+
+VLIB_REGISTER_NODE (gbp_policy_lpm_node) = {
+  .name = "gbp-policy-lpm",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_policy_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(gbp_contract_error_strings),
+  .error_strings = gbp_contract_error_strings,
+
+  .n_next_nodes = GBP_POLICY_N_NEXT,
+  .next_nodes = {
+    [GBP_POLICY_NEXT_DROP] = "error-drop",
+  },
+};
+
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */