gbp: refactor policy nodes

Refactor both policy and policy-dpo nodes so they share the same code
for contract & acl lookup and for tracing.
This should help to implement new policy schemes.

Type: refactor

Change-Id: If5704bda708838eb01516dd39473d9bf248cfdf6
Signed-off-by: Benoît Ganne <bganne@cisco.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/src/plugins/gbp/gbp_policy.h b/src/plugins/gbp/gbp_policy.h
new file mode 100644
index 00000000000..36bb4933c11
--- /dev/null
+++ b/src/plugins/gbp/gbp_policy.h
@@ -0,0 +1,53 @@
+/*
+ * 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.
+ */
+
+#ifndef __GBP_POLICY_H__
+#define __GBP_POLICY_H__
+
+#include <plugins/gbp/gbp_contract.h>
+
+/**
+ * per-packet trace data
+ */
+typedef struct gbp_policy_trace_t_
+{
+  /* per-pkt trace data */
+  gbp_scope_t scope;
+  sclass_t sclass;
+  sclass_t dclass;
+  u32 allowed;
+  u32 flags;
+} gbp_policy_trace_t;
+
+/* packet trace format function */
+u8 * format_gbp_policy_trace (u8 * s, va_list * args);
+
+static_always_inline void
+gbp_policy_trace(vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t *b, const gbp_contract_key_t *key, u8 allowed)
+{
+  gbp_policy_trace_t *t;
+
+  if (PREDICT_TRUE (!(b->flags & VLIB_BUFFER_IS_TRACED)))
+    return;
+
+  t = vlib_add_trace (vm, node, b, sizeof (*t));
+  t->sclass = key->gck_src;
+  t->dclass = key->gck_dst;
+  t->scope = key->gck_scope;
+  t->allowed = allowed;
+  t->flags = vnet_buffer2 (b)->gbp.flags;
+}
+
+#endif /* __GBP_POLICY_H__ */