Revert to [HICN-638] Check if systemd is running before enabling hicn-light service

Signed-off-by: Mauro Sardara <msardara@cisco.com>
Change-Id: I1810d96e001a4e6e097e1efa331b682af750925d

1 files changed, 308 insertions, 0 deletions

diff --git a/hicn-plugin/src/interest_hitpit_node.c b/hicn-plugin/src/interest_hitpit_node.c
new file mode 100644
index 000000000..9ebf183c5
--- /dev/null
+++ b/hicn-plugin/src/interest_hitpit_node.c
@@ -0,0 +1,308 @@
+/*
+ * Copyright (c) 2017-2020 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 <vnet/ip/ip6_packet.h>
+
+#include "interest_hitpit.h"
+#include "mgmt.h"
+#include "parser.h"
+#include "data_fwd.h"
+#include "infra.h"
+#include "strategy.h"
+#include "strategy_dpo_ctx.h"
+#include "strategy_dpo_manager.h"
+#include "state.h"
+#include "error.h"
+#include "face_db.h"
+
+/* packet trace format function */
+static u8 *hicn_interest_hitpit_format_trace (u8 * s, va_list * args);
+
+/* Stats string values */
+static char *hicn_interest_hitpit_error_strings[] = {
+#define _(sym, string) string,
+  foreach_hicnfwd_error
+#undef _
+};
+
+vlib_node_registration_t hicn_interest_hitpit_node;
+
+always_inline void drop_packet (u32 * next0);
+
+/*
+ * hICN forwarder node for interests hitting the PIT
+ */
+static uword
+hicn_interest_hitpit_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+			      vlib_frame_t * frame)
+{
+  u32 n_left_from, *from, *to_next;
+  hicn_interest_hitpit_next_t next_index;
+  hicn_interest_hitpit_runtime_t *rt;
+  vl_api_hicn_api_node_stats_get_reply_t stats = { 0 };
+  f64 tnow;
+
+  rt = vlib_node_get_runtime_data (vm, hicn_interest_hitpit_node.index);
+
+  if (PREDICT_FALSE (rt->pitcs == NULL))
+    {
+      rt->pitcs = &hicn_main.pitcs;
+    }
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+
+  /* Capture time in vpp terms */
+  tnow = vlib_time_now (vm);
+
+  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)
+	{
+	  vlib_buffer_t *b0;
+	  u8 isv6;
+	  u8 *nameptr;
+	  u16 namelen;
+	  u32 bi0;
+	  u32 next0 = HICN_INTEREST_HITPIT_NEXT_ERROR_DROP;
+	  hicn_name_t name;
+	  hicn_header_t *hicn0;
+	  hicn_hash_node_t *node0;
+	  const hicn_strategy_vft_t *strategy_vft0;
+	  const hicn_dpo_vft_t *dpo_vft0;
+	  hicn_pcs_entry_t *pitp;
+	  u8 dpo_ctx_id0;
+	  u8 found = 0;
+	  int nh_idx;
+	  hicn_face_id_t outface;
+	  hicn_hash_entry_t *hash_entry0;
+	  hicn_buffer_t *hicnb0;
+	  int ret;
+
+	  /* Prefetch for next iteration. */
+	  if (n_left_from > 1)
+	    {
+	      vlib_buffer_t *b1;
+	      b1 = vlib_get_buffer (vm, from[1]);
+	      CLIB_PREFETCH (b1, CLIB_CACHE_LINE_BYTES, LOAD);
+	      CLIB_PREFETCH (b1->data, CLIB_CACHE_LINE_BYTES, STORE);
+	    }
+
+	  /* Dequeue a packet buffer */
+	  bi0 = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+	  to_next[0] = bi0;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+
+	  /* Get hicn buffer and state */
+	  hicnb0 = hicn_get_buffer (b0);
+	  hicn_get_internal_state (hicnb0, rt->pitcs, &node0, &strategy_vft0,
+				   &dpo_vft0, &dpo_ctx_id0, &hash_entry0);
+
+
+	  ret = hicn_interest_parse_pkt (b0, &name, &namelen, &hicn0, &isv6);
+	  nameptr = (u8 *) (&name);
+	  pitp = hicn_pit_get_data (node0);
+	  dpo_id_t hicn_dpo_id0 =
+	    { dpo_vft0->hicn_dpo_get_type (), 0, 0, dpo_ctx_id0 };
+
+	  /*
+	   * Check if the hit is instead a collision in the
+	   * hash table. Unlikely to happen.
+	   */
+	  if (PREDICT_FALSE
+	      (ret != HICN_ERROR_NONE
+	       || !hicn_node_compare (nameptr, namelen, node0)))
+	    {
+	      stats.interests_hash_collision++;
+	      /* Remove lock from the entry */
+	      hicn_pcs_remove_lock (rt->pitcs, &pitp, &node0, vm, hash_entry0,
+				    dpo_vft0, &hicn_dpo_id0);
+	      drop_packet (&next0);
+
+	      goto end_processing;
+	    }
+	  /*
+	   * If the entry is expired, remove it no matter of
+	   * the possible cases.
+	   */
+	  if (tnow > pitp->shared.expire_time)
+	    {
+	      strategy_vft0->hicn_on_interest_timeout (dpo_ctx_id0);
+	      hicn_pcs_delete (rt->pitcs, &pitp, &node0, vm, hash_entry0,
+			       dpo_vft0, &hicn_dpo_id0);
+	      stats.pit_expired_count++;
+	      next0 = HICN_INTEREST_HITPIT_NEXT_STRATEGY;
+	    }
+	  else
+	    {
+	      if ((hash_entry0->he_flags & HICN_HASH_ENTRY_FLAG_CS_ENTRY))
+		{
+		  next0 = HICN_INTEREST_HITPIT_NEXT_INTEREST_HITCS;
+		}
+	      else
+		{
+		  /*
+		   * Distinguish between aggregation or
+		   * retransmission
+		   */
+
+		  found =
+		    hicn_face_search (hicnb0->face_id,
+				      &(pitp->u.pit.faces));
+
+		  if (found)
+		    {
+		      strategy_vft0->hicn_select_next_hop (dpo_ctx_id0,
+							   &nh_idx, &outface);
+		      /* Retransmission */
+		      /*
+		       * Prepare the packet for the
+		       * forwarding
+		       */
+		      next0 = isv6 ? HICN_INTEREST_HITPIT_NEXT_FACE6_OUTPUT :
+                        HICN_INTEREST_HITPIT_NEXT_FACE4_OUTPUT;
+		      vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
+			outface;
+
+		      /*
+		       * Update the egress face in
+		       * the PIT
+		       */
+		      pitp->u.pit.pe_txnh = nh_idx;
+		      stats.interests_retx++;
+		    }
+		  else
+		    {
+		      hicn_face_db_add_face (hicnb0->face_id,
+                                             &pitp->u.pit.faces);
+
+		      /* Aggregation */
+		      drop_packet (&next0);
+		      stats.interests_aggregated++;
+		    }
+		  /* Remove lock from the entry */
+		  hicn_pcs_remove_lock (rt->pitcs, &pitp, &node0, vm,
+					hash_entry0, dpo_vft0, &hicn_dpo_id0);
+
+		}
+	    }
+	end_processing:
+
+	  /* Maybe trace */
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+			     (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      hicn_interest_hitpit_trace_t *t =
+		vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->pkt_type = HICN_PKT_TYPE_INTEREST;
+	      t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+	      t->next_index = next0;
+	    }
+	  /* Incr packet counter */
+	  stats.pkts_processed += 1;
+
+	  /*
+	   * Verify speculative enqueue, maybe switch current
+	   * next frame
+	   */
+	  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);
+    }
+  u32 pit_int_count = hicn_pit_get_int_count (rt->pitcs);
+
+
+  vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index,
+			       HICNFWD_ERROR_PROCESSED, stats.pkts_processed);
+  vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index,
+			       HICNFWD_ERROR_INTEREST_AGG,
+			       stats.interests_aggregated);
+  vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index,
+			       HICNFWD_ERROR_INT_RETRANS,
+			       stats.interests_retx);
+  vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index,
+			       HICNFWD_ERROR_PIT_EXPIRED,
+			       stats.pit_expired_count);
+  vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index,
+			       HICNFWD_ERROR_HASH_COLL_HASHTB_COUNT,
+			       stats.interests_hash_collision);
+
+  update_node_counter (vm, hicn_interest_hitpit_node.index,
+		       HICNFWD_ERROR_INT_COUNT, pit_int_count);
+
+  return (frame->n_vectors);
+}
+
+/* packet trace format function */
+static u8 *
+hicn_interest_hitpit_format_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 *);
+  hicn_interest_hitpit_trace_t *t =
+    va_arg (*args, hicn_interest_hitpit_trace_t *);
+
+  s = format (s, "INTEREST-HITPIT: pkt: %d, sw_if_index %d, next index %d",
+	      (int) t->pkt_type, t->sw_if_index, t->next_index);
+  return (s);
+}
+
+void
+drop_packet (u32 * next0)
+{
+  *next0 = HICN_INTEREST_HITPIT_NEXT_ERROR_DROP;
+}
+
+/*
+ * Node registration for the interest forwarder node
+ */
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(hicn_interest_hitpit_node) =
+{
+  .function = hicn_interest_hitpit_node_fn,
+  .name = "hicn-interest-hitpit",
+  .vector_size = sizeof(u32),
+  .runtime_data_bytes = sizeof(hicn_interest_hitpit_runtime_t),
+  .format_trace = hicn_interest_hitpit_format_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN(hicn_interest_hitpit_error_strings),
+  .error_strings = hicn_interest_hitpit_error_strings,
+  .n_next_nodes = HICN_INTEREST_HITPIT_N_NEXT,
+  /* edit / add dispositions here */
+  .next_nodes =
+  {
+    [HICN_INTEREST_HITPIT_NEXT_INTEREST_HITCS] = "hicn-interest-hitcs",
+    [HICN_INTEREST_HITPIT_NEXT_STRATEGY] = "hicn-strategy",
+    [HICN_INTEREST_HITPIT_NEXT_FACE4_OUTPUT] = "hicn4-face-output",
+    [HICN_INTEREST_HITPIT_NEXT_FACE6_OUTPUT] = "hicn6-face-output",
+    [HICN_INTEREST_HITPIT_NEXT_ERROR_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */