ioam: manycast using iOAM and SR (VPP-628)

Change-Id: I6d2afda991d771fb4a89fc3f6544f8e940a9b9f0
Signed-off-by: Shwetha Bhandari <shwethab@cisco.com>

1 files changed, 386 insertions, 0 deletions

diff --git a/src/plugins/ioam/ip6/ioam_cache.c b/src/plugins/ioam/ip6/ioam_cache.c
new file mode 100644
index 00000000000..9e90ff9a920
--- /dev/null
+++ b/src/plugins/ioam/ip6/ioam_cache.c
@@ -0,0 +1,386 @@
+/*
+ * Copyright (c) 2017 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.
+ */
+/*
+ *------------------------------------------------------------------
+ * ioam_cache.c - ioam ip6 API / debug CLI handling
+ *------------------------------------------------------------------
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/plugin/plugin.h>
+#include <ioam/ip6/ioam_cache.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+#include <vnet/ip/ip6_hop_by_hop.h>
+
+#include "ioam_cache.h"
+
+/* define message IDs */
+#include <ioam/ip6/ioam_cache_msg_enum.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <ioam/ip6/ioam_cache_all_api_h.h>
+#undef vl_typedefs
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <ioam/ip6/ioam_cache_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <ioam/ip6/ioam_cache_all_api_h.h>
+#undef vl_printfun
+
+/* Get the API version number */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <ioam/ip6/ioam_cache_all_api_h.h>
+#undef vl_api_version
+
+/*
+ * A handy macro to set up a message reply.
+ * Assumes that the following variables are available:
+ * mp - pointer to request message
+ * rmp - pointer to reply message type
+ * rv - return value
+ */
+
+#define REPLY_MACRO(t)                                          \
+do {                                                            \
+    unix_shared_memory_queue_t * q =                            \
+    vl_api_client_index_to_input_queue (mp->client_index);      \
+    if (!q)                                                     \
+        return;                                                 \
+                                                                \
+    rmp = vl_msg_api_alloc (sizeof (*rmp));                     \
+    rmp->_vl_msg_id = ntohs((t)+cm->msg_id_base);               \
+    rmp->context = mp->context;                                 \
+    rmp->retval = ntohl(rv);                                    \
+                                                                \
+    vl_msg_api_send_shmem (q, (u8 *)&rmp);                      \
+} while(0);
+
+
+/* List of message types that this plugin understands */
+
+#define foreach_ioam_cache_plugin_api_msg                        \
+_(IOAM_CACHE_IP6_ENABLE_DISABLE, ioam_cache_ip6_enable_disable)
+
+static u8 *
+ioam_e2e_id_trace_handler (u8 * s, ip6_hop_by_hop_option_t * opt)
+{
+  ioam_e2e_id_option_t *e2e = (ioam_e2e_id_option_t *) opt;
+
+  if (e2e)
+    {
+      s =
+	format (s, "IP6_HOP_BY_HOP E2E ID = %U\n", format_ip6_address,
+		&(e2e->id));
+    }
+
+
+  return s;
+}
+
+static u8 *
+ioam_e2e_cache_trace_handler (u8 * s, ip6_hop_by_hop_option_t * opt)
+{
+  ioam_e2e_cache_option_t *e2e = (ioam_e2e_cache_option_t *) opt;
+
+  if (e2e)
+    {
+      s =
+	format (s, "IP6_HOP_BY_HOP E2E CACHE = pool:%d idx:%d\n",
+		e2e->pool_id, e2e->pool_index);
+    }
+
+
+  return s;
+}
+
+/* Action function shared between message handler and debug CLI */
+int
+ioam_cache_ip6_enable_disable (ioam_cache_main_t * em, u8 is_disable)
+{
+  vlib_main_t *vm = em->vlib_main;
+
+  if (is_disable == 0)
+    {
+      ioam_cache_table_init (vm);
+      ip6_hbh_set_next_override (em->cache_hbh_slot);
+      ip6_hbh_register_option (HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE_ID,
+			       0, ioam_e2e_id_trace_handler);
+      ip6_hbh_register_option (HBH_OPTION_TYPE_IOAM_E2E_CACHE_ID,
+			       0, ioam_e2e_cache_trace_handler);
+
+    }
+  else
+    {
+      ip6_hbh_set_next_override (IP6_LOOKUP_NEXT_POP_HOP_BY_HOP);
+      ioam_cache_table_destroy (vm);
+      ip6_hbh_unregister_option (HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE_ID);
+      ip6_hbh_unregister_option (HBH_OPTION_TYPE_IOAM_E2E_CACHE_ID);
+    }
+
+  return 0;
+}
+
+/* Action function shared between message handler and debug CLI */
+int
+ioam_tunnel_select_ip6_enable_disable (ioam_cache_main_t * em,
+				       u8 criteria,
+				       u8 no_of_responses, u8 is_disable)
+{
+  vlib_main_t *vm = em->vlib_main;
+
+  if (is_disable == 0)
+    {
+      ioam_cache_ts_table_init (vm);
+      em->criteria_oneway = criteria;
+      em->wait_for_responses = no_of_responses;
+      ip6_hbh_set_next_override (em->ts_hbh_slot);
+      ip6_ioam_ts_cache_set_rewrite ();
+      ip6_hbh_register_option (HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE_ID,
+			       0, ioam_e2e_id_trace_handler);
+      ip6_hbh_register_option (HBH_OPTION_TYPE_IOAM_E2E_CACHE_ID,
+			       0, ioam_e2e_cache_trace_handler);
+
+      /* Turn on the cleanup process */
+      //      vlib_process_signal_event (vm, em->cleanup_process_node_index, 1, 0);
+    }
+  else
+    {
+      ioam_cache_ts_timer_node_enable (vm, 0);
+      ip6_hbh_set_next_override (IP6_LOOKUP_NEXT_POP_HOP_BY_HOP);
+      ioam_cache_ts_table_destroy (vm);
+      ip6_ioam_ts_cache_cleanup_rewrite ();
+      ip6_hbh_unregister_option (HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE_ID);
+      ip6_hbh_unregister_option (HBH_OPTION_TYPE_IOAM_E2E_CACHE_ID);
+    }
+
+  return 0;
+}
+
+/* API message handler */
+static void vl_api_ioam_cache_ip6_enable_disable_t_handler
+  (vl_api_ioam_cache_ip6_enable_disable_t * mp)
+{
+  vl_api_ioam_cache_ip6_enable_disable_reply_t *rmp;
+  ioam_cache_main_t *cm = &ioam_cache_main;
+  int rv;
+
+  rv = ioam_cache_ip6_enable_disable (cm, (int) (mp->is_disable));
+  REPLY_MACRO (VL_API_IOAM_CACHE_IP6_ENABLE_DISABLE_REPLY);
+}
+
+/* Set up the API message handling tables */
+static clib_error_t *
+ioam_cache_plugin_api_hookup (vlib_main_t * vm)
+{
+  ioam_cache_main_t *sm = &ioam_cache_main;
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base),     \
+                           #n,					\
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_api_##n##_t_endian,               \
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 1);
+  foreach_ioam_cache_plugin_api_msg;
+#undef _
+
+  return 0;
+}
+
+static clib_error_t *
+set_ioam_cache_command_fn (vlib_main_t * vm,
+			   unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  ioam_cache_main_t *em = &ioam_cache_main;
+  u8 is_disable = 0;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "disable"))
+	is_disable = 1;
+      else
+	break;
+    }
+  ioam_cache_ip6_enable_disable (em, is_disable);
+
+  return 0;
+}
+
+/* *INDENT_OFF* */
+VLIB_CLI_COMMAND (set_ioam_cache_command, static) =
+{
+.path = "set ioam ip6 cache",.short_help =
+    "set ioam ip6 cache [disable]",.function = set_ioam_cache_command_fn};
+/* *INDENT_ON* */
+
+#define IOAM_TS_WAIT_FOR_RESPONSES 3
+static clib_error_t *
+set_ioam_tunnel_select_command_fn (vlib_main_t * vm,
+				   unformat_input_t * input,
+				   vlib_cli_command_t * cmd)
+{
+  ioam_cache_main_t *em = &ioam_cache_main;
+  u8 is_disable = 0;
+  u8 one_way = 0;
+  u8 no_of_responses = IOAM_TS_WAIT_FOR_RESPONSES;
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "disable"))
+	is_disable = 1;
+      else if (unformat (input, "rtt"))
+	one_way = 0;
+      else if (unformat (input, "oneway"))
+	one_way = 1;
+      else if (unformat (input, "wait_for_responses %d", &no_of_responses))
+	;
+      else
+	break;
+    }
+
+  ioam_tunnel_select_ip6_enable_disable (em, one_way, no_of_responses,
+					 is_disable);
+
+  return 0;
+}
+
+/* *INDENT_OFF* */
+VLIB_CLI_COMMAND (set_ioam_cache_ts_command, static) =
+{
+.path = "set ioam ip6 sr-tunnel-select",.short_help =
+    "set ioam ip6 sr-tunnel-select [disable] [oneway|rtt] [wait_for_responses <n|default 3>]",.function
+    = set_ioam_tunnel_select_command_fn};
+/* *INDENT_ON* */
+
+static void
+ioam_cache_table_print (vlib_main_t * vm, u8 verbose)
+{
+  ioam_cache_main_t *cm = &ioam_cache_main;
+  ioam_cache_entry_t *entry = 0;
+  ioam_cache_ts_entry_t *ts_entry = 0;
+  int no_of_threads = vec_len (vlib_worker_threads);
+  int i;
+
+  pool_foreach (entry, cm->ioam_rewrite_pool, (
+						{
+						vlib_cli_output (vm, "%U",
+								 format_ioam_cache_entry,
+								 entry);
+						}));
+
+  if (cm->ts_stats)
+    for (i = 0; i < no_of_threads; i++)
+      {
+	vlib_cli_output (vm, "Number of entries in thread-%d selection pool: %lu\n \
+                          (pool found to be full: %lu times)", i,
+			 cm->ts_stats[i].inuse, cm->ts_stats[i].add_failed);
+
+	if (verbose == 1)
+	  vlib_worker_thread_barrier_sync (vm);
+	pool_foreach (ts_entry, cm->ioam_ts_pool[i], (
+						       {
+						       vlib_cli_output (vm,
+									"%U",
+									format_ioam_cache_ts_entry,
+									ts_entry,
+									(u32)
+									i);
+						       }
+		      ));
+	vlib_worker_thread_barrier_release (vm);
+      }
+
+}
+
+static clib_error_t *
+show_ioam_cache_command_fn (vlib_main_t * vm,
+			    unformat_input_t * input,
+			    vlib_cli_command_t * cmd)
+{
+  u8 verbose = 0;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "verbose"))
+	verbose = 1;
+    }
+  ioam_cache_table_print (vm, verbose);
+
+
+  return 0;
+}
+
+/* *INDENT_OFF* */
+VLIB_CLI_COMMAND (show_ioam_cache_command, static) =
+{
+.path = "show ioam ip6 cache",.short_help =
+    "show ioam ip6 cache [verbose]",.function = show_ioam_cache_command_fn};
+/* *INDENT_ON* */
+
+static clib_error_t *
+ioam_cache_init (vlib_main_t * vm)
+{
+  ioam_cache_main_t *em = &ioam_cache_main;
+  clib_error_t *error = 0;
+  u8 *name;
+  u32 cache_node_index = ioam_cache_node.index;
+  u32 ts_node_index = ioam_cache_ts_node.index;
+  vlib_node_t *ip6_hbyh_node = NULL, *ip6_hbh_pop_node = NULL, *error_node =
+    NULL;
+
+  name = format (0, "ioam_cache_%08x%c", api_version, 0);
+
+  memset (&ioam_cache_main, 0, sizeof (ioam_cache_main));
+  /* Ask for a correctly-sized block of API message decode slots */
+  em->msg_id_base = vl_msg_api_get_msg_ids
+    ((char *) name, VL_MSG_FIRST_AVAILABLE);
+
+  error = ioam_cache_plugin_api_hookup (vm);
+  /* Hook this node to ip6-hop-by-hop */
+  ip6_hbyh_node = vlib_get_node_by_name (vm, (u8 *) "ip6-hop-by-hop");
+  em->cache_hbh_slot =
+    vlib_node_add_next (vm, ip6_hbyh_node->index, cache_node_index);
+  em->ts_hbh_slot =
+    vlib_node_add_next (vm, ip6_hbyh_node->index, ts_node_index);
+
+  ip6_hbh_pop_node = vlib_get_node_by_name (vm, (u8 *) "ip6-pop-hop-by-hop");
+  em->ip6_hbh_pop_node_index = ip6_hbh_pop_node->index;
+
+  error_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
+  em->error_node_index = error_node->index;
+  em->vlib_main = vm;
+
+  vec_free (name);
+
+  return error;
+}
+
+VLIB_INIT_FUNCTION (ioam_cache_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */