GBP: l3-out subnets

Change-Id: Id4a20066fc5be716c61a497dfcb4d00dc1dbb28d
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 203 insertions, 0 deletions

diff --git a/src/plugins/gbp/gbp_ext_itf.c b/src/plugins/gbp/gbp_ext_itf.c
new file mode 100644
index 00000000000..57ff625d64a
--- /dev/null
+++ b/src/plugins/gbp/gbp_ext_itf.c
@@ -0,0 +1,203 @@
+/*
+ * 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_ext_itf.h>
+#include <plugins/gbp/gbp_bridge_domain.h>
+#include <plugins/gbp/gbp_route_domain.h>
+#include <plugins/gbp/gbp_itf.h>
+
+/**
+ * Pool of GBP ext_itfs
+ */
+gbp_ext_itf_t *gbp_ext_itf_pool;
+
+/**
+ * external interface configs keyed by sw_if_index
+ */
+index_t *gbp_ext_itf_db;
+
+#define GBP_EXT_ITF_ID 0x00000080
+
+/**
+ * logger
+ */
+vlib_log_class_t gx_logger;
+
+#define GBP_EXT_ITF_DBG(...)                           \
+    vlib_log_debug (gx_logger, __VA_ARGS__);
+
+u8 *
+format_gbp_ext_itf (u8 * s, va_list * args)
+{
+  gbp_ext_itf_t *gx = va_arg (*args, gbp_ext_itf_t *);
+
+  return (format (s, "%U in %U",
+		  format_gbp_itf, gx->gx_itf,
+		  format_gbp_bridge_domain, gx->gx_bd));
+}
+
+int
+gbp_ext_itf_add (u32 sw_if_index, u32 bd_id, u32 rd_id)
+{
+  gbp_ext_itf_t *gx;
+  index_t gxi;
+
+  vec_validate_init_empty (gbp_ext_itf_db, sw_if_index, INDEX_INVALID);
+
+  gxi = gbp_ext_itf_db[sw_if_index];
+
+  if (INDEX_INVALID == gxi)
+    {
+      gbp_bridge_domain_t *gb;
+      gbp_route_domain_t *gr;
+      fib_protocol_t fproto;
+      index_t gbi, gri;
+
+      gbi = gbp_bridge_domain_find_and_lock (bd_id);
+
+      if (INDEX_INVALID == gbi)
+	return (VNET_API_ERROR_NO_SUCH_ENTRY);
+
+      gri = gbp_route_domain_find_and_lock (rd_id);
+
+      if (INDEX_INVALID == gri)
+	{
+	  gbp_bridge_domain_unlock (gbi);
+	  return (VNET_API_ERROR_NO_SUCH_ENTRY);
+	}
+
+      pool_get_zero (gbp_ext_itf_pool, gx);
+      gxi = gx - gbp_ext_itf_pool;
+
+      gb = gbp_bridge_domain_get (gbi);
+      gr = gbp_route_domain_get (gri);
+
+      gx->gx_bd = gbi;
+      gx->gx_rd = gri;
+
+      FOR_EACH_FIB_IP_PROTOCOL (fproto)
+      {
+	gx->gx_fib_index[fproto] =
+	  gr->grd_fib_index[fib_proto_to_dpo (fproto)];
+      }
+
+      gx->gx_itf = gbp_itf_add_and_lock (sw_if_index, gb->gb_bd_index);
+      gbp_itf_set_l2_input_feature (gx->gx_itf, (gxi | GBP_EXT_ITF_ID),
+				    L2INPUT_FEAT_GBP_LPM_CLASSIFY);
+
+      gbp_ext_itf_db[sw_if_index] = gxi;
+
+      GBP_EXT_ITF_DBG ("add: %U", format_gbp_ext_itf, gx);
+
+      return (0);
+    }
+
+  return (VNET_API_ERROR_ENTRY_ALREADY_EXISTS);
+}
+
+int
+gbp_ext_itf_delete (u32 sw_if_index)
+{
+  gbp_ext_itf_t *gx;
+  index_t gxi;
+
+  gxi = gbp_ext_itf_db[sw_if_index];
+
+  if (INDEX_INVALID != gxi)
+    {
+      gx = pool_elt_at_index (gbp_ext_itf_pool, gxi);
+
+      GBP_EXT_ITF_DBG ("del: %U", format_gbp_ext_itf, gx);
+
+      gbp_itf_set_l2_input_feature (gx->gx_itf,
+				    (gxi | GBP_EXT_ITF_ID),
+				    L2INPUT_FEAT_NONE);
+      gbp_itf_unlock (gx->gx_itf);
+
+      gbp_route_domain_unlock (gx->gx_rd);
+      gbp_bridge_domain_unlock (gx->gx_bd);
+
+      gbp_ext_itf_db[sw_if_index] = INDEX_INVALID;
+      pool_put (gbp_ext_itf_pool, gx);
+
+      return (0);
+    }
+  return (VNET_API_ERROR_NO_SUCH_ENTRY);
+}
+
+void
+gbp_ext_itf_walk (gbp_ext_itf_cb_t cb, void *ctx)
+{
+  gbp_ext_itf_t *ge;
+
+  /* *INDENT-OFF* */
+  pool_foreach(ge, gbp_ext_itf_pool,
+  {
+    if (!cb(ge, ctx))
+      break;
+  });
+  /* *INDENT-ON* */
+}
+
+static walk_rc_t
+gbp_ext_itf_show_one (gbp_ext_itf_t * gx, void *ctx)
+{
+  vlib_cli_output (ctx, "  %U", format_gbp_ext_itf, gx);
+
+  return (WALK_CONTINUE);
+}
+
+static clib_error_t *
+gbp_ext_itf_show (vlib_main_t * vm,
+		  unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  vlib_cli_output (vm, "External-Interfaces:");
+  gbp_ext_itf_walk (gbp_ext_itf_show_one, vm);
+
+  return (NULL);
+}
+
+/*?
+ * Show Group Based Policy external interface and derived information
+ *
+ * @cliexpar
+ * @cliexstart{show gbp ext-itf}
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (gbp_ext_itf_show_node, static) = {
+  .path = "show gbp ext-itf",
+  .short_help = "show gbp ext-itf\n",
+  .function = gbp_ext_itf_show,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+gbp_ext_itf_init (vlib_main_t * vm)
+{
+  gx_logger = vlib_log_register_class ("gbp", "ext-itf");
+
+  return (NULL);
+}
+
+VLIB_INIT_FUNCTION (gbp_ext_itf_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */