GBP Endpoint Learning

Learning GBP endpoints over vxlan-gbp tunnels

Change-Id: I1db9fda5a16802d9ad8b4efd4e475614f3b21502
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>

1 files changed, 368 insertions, 0 deletions

diff --git a/src/plugins/gbp/gbp_bridge_domain.c b/src/plugins/gbp/gbp_bridge_domain.c
new file mode 100644
index 00000000000..b7812eb1645
--- /dev/null
+++ b/src/plugins/gbp/gbp_bridge_domain.c
@@ -0,0 +1,368 @@
+/*
+ * 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_bridge_domain.h>
+#include <plugins/gbp/gbp_endpoint.h>
+
+#include <vnet/dpo/dvr_dpo.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/l2/l2_input.h>
+#include <vnet/l2/feat_bitmap.h>
+#include <vnet/l2/l2_bvi.h>
+#include <vnet/l2/l2_fib.h>
+
+/**
+ * Pool of GBP bridge_domains
+ */
+gbp_bridge_domain_t *gbp_bridge_domain_pool;
+
+/**
+ * DB of bridge_domains
+ */
+typedef struct gbp_bridge_domain_db_t
+{
+  uword *gbd_by_bd_id;
+} gbp_bridge_domain_db_t;
+
+static gbp_bridge_domain_db_t gbp_bridge_domain_db;
+
+/**
+ * logger
+ */
+vlib_log_class_t gb_logger;
+
+#define GBP_BD_DBG(...)                           \
+    vlib_log_debug (gb_logger, __VA_ARGS__);
+
+gbp_bridge_domain_t *
+gbp_bridge_domain_get (index_t i)
+{
+  return (pool_elt_at_index (gbp_bridge_domain_pool, i));
+}
+
+static void
+gbp_bridge_domain_lock (index_t i)
+{
+  gbp_bridge_domain_t *gb;
+
+  gb = gbp_bridge_domain_get (i);
+  gb->gb_locks++;
+}
+
+static index_t
+gbp_bridge_domain_find (u32 bd_id)
+{
+  uword *p;
+
+  p = hash_get (gbp_bridge_domain_db.gbd_by_bd_id, bd_id);
+
+  if (NULL != p)
+    return p[0];
+
+  return (INDEX_INVALID);
+}
+
+index_t
+gbp_bridge_domain_find_and_lock (u32 bd_id)
+{
+  uword *p;
+
+  p = hash_get (gbp_bridge_domain_db.gbd_by_bd_id, bd_id);
+
+  if (NULL != p)
+    {
+      gbp_bridge_domain_lock (p[0]);
+      return p[0];
+    }
+  return (INDEX_INVALID);
+}
+
+static void
+gbp_bridge_domain_db_add (gbp_bridge_domain_t * gb)
+{
+  index_t gbi = gb - gbp_bridge_domain_pool;
+
+  hash_set (gbp_bridge_domain_db.gbd_by_bd_id, gb->gb_bd_id, gbi);
+}
+
+static void
+gbp_bridge_domain_db_remove (gbp_bridge_domain_t * gb)
+{
+  hash_unset (gbp_bridge_domain_db.gbd_by_bd_id, gb->gb_bd_id);
+}
+
+int
+gbp_bridge_domain_add_and_lock (u32 bd_id,
+				u32 bvi_sw_if_index, u32 uu_fwd_sw_if_index)
+{
+  gbp_bridge_domain_t *gb;
+  index_t gbi;
+
+  gbi = gbp_bridge_domain_find (bd_id);
+
+  if (INDEX_INVALID == gbi)
+    {
+      u32 bd_index;
+
+      bd_index = bd_find_index (&bd_main, bd_id);
+
+      if (~0 == bd_index)
+	return (VNET_API_ERROR_BD_NOT_MODIFIABLE);
+
+      /*
+       * unset learning in the bridge
+       */
+      bd_set_flags (vlib_get_main (), bd_index, L2_LEARN, 0);
+
+      pool_get (gbp_bridge_domain_pool, gb);
+      memset (gb, 0, sizeof (*gb));
+
+      gb->gb_bd_id = bd_id;
+      gb->gb_bd_index = bd_index;
+      gb->gb_uu_fwd_sw_if_index = uu_fwd_sw_if_index;
+      gb->gb_bvi_sw_if_index = bvi_sw_if_index;
+      gb->gb_locks = 1;
+
+      /*
+       * Set the BVI and uu-flood interfaces into the BD
+       */
+      set_int_l2_mode (vlib_get_main (), vnet_get_main (),
+		       MODE_L2_BRIDGE, gb->gb_bvi_sw_if_index,
+		       bd_index, L2_BD_PORT_TYPE_BVI, 0, 0);
+      if (~0 != gb->gb_uu_fwd_sw_if_index)
+	set_int_l2_mode (vlib_get_main (), vnet_get_main (),
+			 MODE_L2_BRIDGE, gb->gb_uu_fwd_sw_if_index,
+			 bd_index, L2_BD_PORT_TYPE_UU_FWD, 0, 0);
+
+      /*
+       * Add the BVI's MAC to the L2FIB
+       */
+      l2fib_add_entry (vnet_sw_interface_get_hw_address
+		       (vnet_get_main (), gb->gb_bvi_sw_if_index),
+		       gb->gb_bd_index, gb->gb_bvi_sw_if_index,
+		       (L2FIB_ENTRY_RESULT_FLAG_STATIC |
+			L2FIB_ENTRY_RESULT_FLAG_BVI));
+
+      gbp_bridge_domain_db_add (gb);
+    }
+  else
+    {
+      gb = gbp_bridge_domain_get (gbi);
+      gb->gb_locks++;
+    }
+
+  GBP_BD_DBG ("add: %U", format_gbp_bridge_domain, gb);
+
+  return (0);
+}
+
+void
+gbp_bridge_domain_unlock (index_t index)
+{
+  gbp_bridge_domain_t *gb;
+
+  gb = gbp_bridge_domain_get (index);
+
+  gb->gb_locks--;
+
+  if (0 == gb->gb_locks)
+    {
+      GBP_BD_DBG ("destroy: %U", format_gbp_bridge_domain, gb);
+
+      l2fib_del_entry (vnet_sw_interface_get_hw_address
+		       (vnet_get_main (), gb->gb_bvi_sw_if_index),
+		       gb->gb_bd_index, gb->gb_bvi_sw_if_index);
+
+      set_int_l2_mode (vlib_get_main (), vnet_get_main (),
+		       MODE_L3, gb->gb_bvi_sw_if_index,
+		       gb->gb_bd_index, L2_BD_PORT_TYPE_BVI, 0, 0);
+      if (~0 != gb->gb_uu_fwd_sw_if_index)
+	set_int_l2_mode (vlib_get_main (), vnet_get_main (),
+			 MODE_L3, gb->gb_uu_fwd_sw_if_index,
+			 gb->gb_bd_index, L2_BD_PORT_TYPE_UU_FWD, 0, 0);
+
+      gbp_bridge_domain_db_remove (gb);
+
+      pool_put (gbp_bridge_domain_pool, gb);
+    }
+}
+
+int
+gbp_bridge_domain_delete (u32 bd_id)
+{
+  index_t gbi;
+
+  GBP_BD_DBG ("del: %d", bd_id);
+  gbi = gbp_bridge_domain_find (bd_id);
+
+  if (INDEX_INVALID != gbi)
+    {
+      GBP_BD_DBG ("del: %U", format_gbp_bridge_domain,
+		  gbp_bridge_domain_get (gbi));
+      gbp_bridge_domain_unlock (gbi);
+
+      return (0);
+    }
+
+  return (VNET_API_ERROR_NO_SUCH_ENTRY);
+}
+
+void
+gbp_bridge_domain_walk (gbp_bridge_domain_cb_t cb, void *ctx)
+{
+  gbp_bridge_domain_t *gbpe;
+
+  /* *INDENT-OFF* */
+  pool_foreach(gbpe, gbp_bridge_domain_pool,
+  {
+    if (!cb(gbpe, ctx))
+      break;
+  });
+  /* *INDENT-ON* */
+}
+
+static clib_error_t *
+gbp_bridge_domain_cli (vlib_main_t * vm,
+		       unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  u32 uu_fwd_sw_if_index = ~0;
+  u32 bvi_sw_if_index = ~0;
+  u32 bd_id = ~0;
+  u8 add = 1;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "bvi %U", unformat_vnet_sw_interface,
+		    vnm, &bvi_sw_if_index))
+	;
+      else if (unformat (input, "uu-flood %U", unformat_vnet_sw_interface,
+			 vnm, &uu_fwd_sw_if_index))
+	;
+      else if (unformat (input, "add"))
+	add = 1;
+      else if (unformat (input, "del"))
+	add = 0;
+      else if (unformat (input, "bd %d", &bd_id))
+	;
+      else
+	break;
+    }
+
+  if (~0 == bd_id)
+    return clib_error_return (0, "EPG-ID must be specified");
+
+  if (add)
+    {
+      if (~0 == bvi_sw_if_index)
+	return clib_error_return (0, "interface must be specified");
+
+      gbp_bridge_domain_add_and_lock (bd_id,
+				      bvi_sw_if_index, uu_fwd_sw_if_index);
+    }
+  else
+    gbp_bridge_domain_delete (bd_id);
+
+  return (NULL);
+}
+
+/*?
+ * Configure a GBP bridge-domain
+ *
+ * @cliexpar
+ * @cliexstart{set gbp bridge-domain [del] bd <ID> bvi <interface> uu-flood <interface>}
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (gbp_bridge_domain_cli_node, static) = {
+  .path = "gbp bridge-domain",
+  .short_help = "gbp bridge-domain [del] epg bd <ID> bvi <interface> uu-flood <interface>",
+  .function = gbp_bridge_domain_cli,
+};
+
+u8 *
+format_gbp_bridge_domain (u8 * s, va_list * args)
+{
+  gbp_bridge_domain_t *gb = va_arg (*args, gbp_bridge_domain_t*);
+  vnet_main_t *vnm = vnet_get_main ();
+
+  if (NULL != gb)
+    s = format (s, "[%d] bd:[%d,%d], bvi:%U uu-flood:%U locks:%d",
+                gb - gbp_bridge_domain_pool,
+                gb->gb_bd_id,
+                gb->gb_bd_index,
+                format_vnet_sw_if_index_name, vnm, gb->gb_bvi_sw_if_index,
+                format_vnet_sw_if_index_name, vnm, gb->gb_uu_fwd_sw_if_index,
+                gb->gb_locks);
+  else
+    s = format (s, "NULL");
+
+  return (s);
+}
+
+static int
+gbp_bridge_domain_show_one (gbp_bridge_domain_t *gb, void *ctx)
+{
+  vlib_main_t *vm;
+
+  vm = ctx;
+  vlib_cli_output (vm, "  %U",format_gbp_bridge_domain, gb);
+
+  return (1);
+}
+
+static clib_error_t *
+gbp_bridge_domain_show (vlib_main_t * vm,
+		   unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  vlib_cli_output (vm, "Bridge-Domains:");
+  gbp_bridge_domain_walk (gbp_bridge_domain_show_one, vm);
+
+  return (NULL);
+}
+
+
+/*?
+ * Show Group Based Policy Bridge_Domains and derived information
+ *
+ * @cliexpar
+ * @cliexstart{show gbp bridge_domain}
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (gbp_bridge_domain_show_node, static) = {
+  .path = "show gbp bridge-domain",
+  .short_help = "show gbp bridge-domain\n",
+  .function = gbp_bridge_domain_show,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+gbp_bridge_domain_init (vlib_main_t * vm)
+{
+  gb_logger = vlib_log_register_class ("gbp", "bd");
+
+  return (NULL);
+}
+
+VLIB_INIT_FUNCTION (gbp_bridge_domain_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */