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, 308 insertions, 0 deletions

diff --git a/src/plugins/gbp/gbp_fwd_dpo.c b/src/plugins/gbp/gbp_fwd_dpo.c
new file mode 100644
index 00000000000..e3dba5fa527
--- /dev/null
+++ b/src/plugins/gbp/gbp_fwd_dpo.c
@@ -0,0 +1,308 @@
+/*
+ * 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_fwd_dpo.h>
+
+#include <vnet/ethernet/ethernet.h>
+
+/**
+ * The 'DB' of GBP FWD DPOs.
+ * There is one per-proto
+ */
+static index_t gbp_fwd_dpo_db[DPO_PROTO_NUM] = { INDEX_INVALID };
+
+/**
+ * DPO type registered for these GBP FWD
+ */
+static dpo_type_t gbp_fwd_dpo_type;
+
+/**
+ * @brief pool of all interface DPOs
+ */
+gbp_fwd_dpo_t *gbp_fwd_dpo_pool;
+
+static gbp_fwd_dpo_t *
+gbp_fwd_dpo_alloc (void)
+{
+  gbp_fwd_dpo_t *gfd;
+
+  pool_get (gbp_fwd_dpo_pool, gfd);
+
+  return (gfd);
+}
+
+static inline gbp_fwd_dpo_t *
+gbp_fwd_dpo_get_from_dpo (const dpo_id_t * dpo)
+{
+  ASSERT (gbp_fwd_dpo_type == dpo->dpoi_type);
+
+  return (gbp_fwd_dpo_get (dpo->dpoi_index));
+}
+
+static inline index_t
+gbp_fwd_dpo_get_index (gbp_fwd_dpo_t * gfd)
+{
+  return (gfd - gbp_fwd_dpo_pool);
+}
+
+static void
+gbp_fwd_dpo_lock (dpo_id_t * dpo)
+{
+  gbp_fwd_dpo_t *gfd;
+
+  gfd = gbp_fwd_dpo_get_from_dpo (dpo);
+  gfd->gfd_locks++;
+}
+
+static void
+gbp_fwd_dpo_unlock (dpo_id_t * dpo)
+{
+  gbp_fwd_dpo_t *gfd;
+
+  gfd = gbp_fwd_dpo_get_from_dpo (dpo);
+  gfd->gfd_locks--;
+
+  if (0 == gfd->gfd_locks)
+    {
+      gbp_fwd_dpo_db[gfd->gfd_proto] = INDEX_INVALID;
+      pool_put (gbp_fwd_dpo_pool, gfd);
+    }
+}
+
+void
+gbp_fwd_dpo_add_or_lock (dpo_proto_t dproto, dpo_id_t * dpo)
+{
+  gbp_fwd_dpo_t *gfd;
+
+  if (INDEX_INVALID == gbp_fwd_dpo_db[dproto])
+    {
+      gfd = gbp_fwd_dpo_alloc ();
+
+      gfd->gfd_proto = dproto;
+
+      gbp_fwd_dpo_db[dproto] = gbp_fwd_dpo_get_index (gfd);
+    }
+  else
+    {
+      gfd = gbp_fwd_dpo_get (gbp_fwd_dpo_db[dproto]);
+    }
+
+  dpo_set (dpo, gbp_fwd_dpo_type, dproto, gbp_fwd_dpo_get_index (gfd));
+}
+
+u8 *
+format_gbp_fwd_dpo (u8 * s, va_list * ap)
+{
+  index_t index = va_arg (*ap, index_t);
+  CLIB_UNUSED (u32 indent) = va_arg (*ap, u32);
+  gbp_fwd_dpo_t *gfd = gbp_fwd_dpo_get (index);
+
+  return (format (s, "gbp-fwd-dpo: %U", format_dpo_proto, gfd->gfd_proto));
+}
+
+const static dpo_vft_t gbp_fwd_dpo_vft = {
+  .dv_lock = gbp_fwd_dpo_lock,
+  .dv_unlock = gbp_fwd_dpo_unlock,
+  .dv_format = format_gbp_fwd_dpo,
+};
+
+/**
+ * @brief The per-protocol VLIB graph nodes that are assigned to a glean
+ *        object.
+ *
+ * this means that these graph nodes are ones from which a glean is the
+ * parent object in the DPO-graph.
+ */
+const static char *const gbp_fwd_dpo_ip4_nodes[] = {
+  "ip4-gbp-fwd-dpo",
+  NULL,
+};
+
+const static char *const gbp_fwd_dpo_ip6_nodes[] = {
+  "ip6-gbp-fwd-dpo",
+  NULL,
+};
+
+const static char *const *const gbp_fwd_dpo_nodes[DPO_PROTO_NUM] = {
+  [DPO_PROTO_IP4] = gbp_fwd_dpo_ip4_nodes,
+  [DPO_PROTO_IP6] = gbp_fwd_dpo_ip6_nodes,
+};
+
+dpo_type_t
+gbp_fwd_dpo_get_type (void)
+{
+  return (gbp_fwd_dpo_type);
+}
+
+static clib_error_t *
+gbp_fwd_dpo_module_init (vlib_main_t * vm)
+{
+  dpo_proto_t dproto;
+
+  FOR_EACH_DPO_PROTO (dproto)
+  {
+    gbp_fwd_dpo_db[dproto] = INDEX_INVALID;
+  }
+
+  gbp_fwd_dpo_type = dpo_register_new_type (&gbp_fwd_dpo_vft,
+					    gbp_fwd_dpo_nodes);
+
+  return (NULL);
+}
+
+VLIB_INIT_FUNCTION (gbp_fwd_dpo_module_init);
+
+typedef struct gbp_fwd_dpo_trace_t_
+{
+  u32 src_epg;
+  u32 dpo_index;
+} gbp_fwd_dpo_trace_t;
+
+typedef enum
+{
+  GBP_FWD_DROP,
+  GBP_FWD_FWD,
+  GBP_FWD_N_NEXT,
+} gbp_fwd_next_t;
+
+always_inline uword
+gbp_fwd_dpo_inline (vlib_main_t * vm,
+		    vlib_node_runtime_t * node,
+		    vlib_frame_t * from_frame, fib_protocol_t fproto)
+{
+  u32 n_left_from, next_index, *from, *to_next;
+
+  from = vlib_frame_vector_args (from_frame);
+  n_left_from = from_frame->n_vectors;
+
+  next_index = node->cached_next_index;
+
+  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)
+	{
+	  const dpo_id_t *next_dpo0;
+	  vlib_buffer_t *b0;
+	  epg_id_t src_epg0;
+	  u32 bi0, next0;
+
+	  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);
+
+	  src_epg0 = vnet_buffer2 (b0)->gbp.src_epg;
+	  next_dpo0 = gbp_epg_dpo_lookup (src_epg0, fproto);
+
+	  if (PREDICT_TRUE (NULL != next_dpo0))
+	    {
+	      vnet_buffer (b0)->ip.adj_index[VLIB_TX] = next_dpo0->dpoi_index;
+	      next0 = GBP_FWD_FWD;
+	    }
+	  else
+	    {
+	      next0 = GBP_FWD_DROP;
+	    }
+
+	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      gbp_fwd_dpo_trace_t *tr;
+
+	      tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
+	      tr->src_epg = src_epg0;
+	      tr->dpo_index = (NULL != next_dpo0 ?
+			       next_dpo0->dpoi_index : ~0);
+	    }
+
+	  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 from_frame->n_vectors;
+}
+
+static u8 *
+format_gbp_fwd_dpo_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_fwd_dpo_trace_t *t = va_arg (*args, gbp_fwd_dpo_trace_t *);
+
+  s = format (s, " epg:%d dpo:%d", t->src_epg, t->dpo_index);
+
+  return s;
+}
+
+static uword
+ip4_gbp_fwd_dpo (vlib_main_t * vm,
+		 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+  return (gbp_fwd_dpo_inline (vm, node, from_frame, FIB_PROTOCOL_IP4));
+}
+
+static uword
+ip6_gbp_fwd_dpo (vlib_main_t * vm,
+		 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+  return (gbp_fwd_dpo_inline (vm, node, from_frame, FIB_PROTOCOL_IP6));
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_gbp_fwd_dpo_node) = {
+    .function = ip4_gbp_fwd_dpo,
+    .name = "ip4-gbp-fwd-dpo",
+    .vector_size = sizeof (u32),
+    .format_trace = format_gbp_fwd_dpo_trace,
+    .n_next_nodes = GBP_FWD_N_NEXT,
+    .next_nodes =
+    {
+        [GBP_FWD_DROP] = "ip4-drop",
+        [GBP_FWD_FWD] = "ip4-dvr-dpo",
+    }
+};
+VLIB_REGISTER_NODE (ip6_gbp_fwd_dpo_node) = {
+    .function = ip6_gbp_fwd_dpo,
+    .name = "ip6-gbp-fwd-dpo",
+    .vector_size = sizeof (u32),
+    .format_trace = format_gbp_fwd_dpo_trace,
+    .n_next_nodes = GBP_FWD_N_NEXT,
+    .next_nodes =
+    {
+        [GBP_FWD_DROP] = "ip6-drop",
+        [GBP_FWD_FWD] = "ip6-dvr-dpo",
+    }
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_gbp_fwd_dpo_node, ip4_gbp_fwd_dpo)
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_gbp_fwd_dpo_node, ip6_gbp_fwd_dpo)
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */