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, 223 insertions, 0 deletions

diff --git a/hicn-plugin/src/data_pcslookup_node.c b/hicn-plugin/src/data_pcslookup_node.c
new file mode 100644
index 000000000..99af350b0
--- /dev/null
+++ b/hicn-plugin/src/data_pcslookup_node.c
@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) 2017-2019 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 "data_pcslookup.h"
+#include "infra.h"
+#include "mgmt.h"
+#include "parser.h"
+#include "state.h"
+#include "strategy.h"
+#include "strategy_dpo_manager.h"
+
+/* Stats string values */
+static char *hicn_data_pcslookup_error_strings[] = {
+#define _(sym, string) string,
+  foreach_hicnfwd_error
+#undef _
+};
+
+/* packet trace format function */
+always_inline u8 *hicn_data_pcslookup_format_trace (u8 * s, va_list * args);
+
+vlib_node_registration_t hicn_data_pcslookup_node;
+
+/*
+ * hICN node for handling data. It performs a lookup in the PIT.
+ */
+static uword
+hicn_data_pcslookup_node_fn (vlib_main_t * vm,
+			     vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  u32 n_left_from, *from, *to_next;
+  hicn_data_pcslookup_next_t next_index;
+  hicn_data_pcslookup_runtime_t *rt;
+  vl_api_hicn_api_node_stats_get_reply_t stats = { 0 };
+
+  rt = vlib_node_get_runtime_data (vm, node->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;
+
+  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_DATA_PCSLOOKUP_NEXT_ERROR_DROP;
+	  u64 name_hash = 0;
+	  hicn_name_t name;
+	  hicn_header_t *hicn0 = NULL;
+	  u32 node_id0 = 0;
+	  index_t dpo_ctx_id0 = 0;
+	  int ret0;
+	  u8 vft_id0;
+	  u8 is_cs0;
+	  u8 hash_entry_id = 0;
+	  u8 bucket_is_overflown = 0;
+	  u32 bucket_id = ~0;
+
+	  /* Prefetch for next iteration. */
+	  if (n_left_from > 1)
+	    {
+	      vlib_buffer_t *b1;
+	      b1 = vlib_get_buffer (vm, from[1]);
+	      // Prefetch two cache lines-- 128 byte-- so that we load the
+	      // hicn_buffer_t as well
+	      CLIB_PREFETCH (b1, 2 * CLIB_CACHE_LINE_BYTES, STORE);
+	      CLIB_PREFETCH (b1->data, CLIB_CACHE_LINE_BYTES, LOAD);
+	    }
+	  /* 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);
+	  next0 = HICN_DATA_PCSLOOKUP_NEXT_ERROR_DROP;
+
+	  /* Incr packet counter */
+	  stats.pkts_processed += 1;
+
+	  ret0 = hicn_data_parse_pkt (b0, &name, &namelen, &hicn0, &isv6);
+	  nameptr = (u8 *) (&name);
+
+	  if (PREDICT_TRUE (ret0 == HICN_ERROR_NONE &&
+			    hicn_hashtb_fullhash (nameptr, namelen,
+						  &name_hash) ==
+			    HICN_ERROR_NONE))
+	    {
+	      int res =
+		hicn_hashtb_lookup_node (rt->pitcs->pcs_table, nameptr,
+					 namelen, name_hash,
+					 1
+					 /*is_data. Do not take lock if hit CS */
+					 ,
+					 &node_id0, &dpo_ctx_id0, &vft_id0,
+					 &is_cs0, &hash_entry_id, &bucket_id,
+					 &bucket_is_overflown);
+
+	      stats.pkts_data_count += 1;
+
+              if (res == HICN_ERROR_NONE)
+		{
+		  /*
+		   * In case the result of the lookup
+		   * is a CS entry, the packet is
+		   * dropped
+		   */
+		  next0 = HICN_DATA_PCSLOOKUP_NEXT_DATA_FWD + is_cs0;
+		}
+	    }
+
+	  hicn_store_internal_state (b0, name_hash, node_id0, dpo_ctx_id0,
+				     vft_id0, hash_entry_id, bucket_id,
+				     bucket_is_overflown);
+
+	  /*
+	   * Verify speculative enqueue, maybe switch current
+	   * next frame
+	   */
+	  /*
+	   * Fix in case of a wrong speculation. Needed to
+	   * clone the data in the right frame
+	   */
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					   n_left_to_next, bi0, next0);
+
+	  /* Maybe trace */
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+			     (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      hicn_data_pcslookup_trace_t *t =
+		vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->pkt_type = HICN_PKT_TYPE_CONTENT;
+	      t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+	      t->next_index = next0;
+	    }
+	}
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+  /* Check the CS LRU, and trim if necessary. */
+  u32 pit_int_count = hicn_pit_get_int_count (rt->pitcs);
+  u32 pit_cs_count = hicn_pit_get_cs_count (rt->pitcs);
+
+  vlib_node_increment_counter (vm, hicn_data_pcslookup_node.index,
+			       HICNFWD_ERROR_PROCESSED, stats.pkts_processed);
+
+  vlib_node_increment_counter (vm, hicn_data_pcslookup_node.index,
+			       HICNFWD_ERROR_DATAS, stats.pkts_data_count);
+
+  update_node_counter (vm, hicn_data_pcslookup_node.index,
+		       HICNFWD_ERROR_INT_COUNT, pit_int_count);
+  update_node_counter (vm, hicn_data_pcslookup_node.index,
+		       HICNFWD_ERROR_CS_COUNT, pit_cs_count);
+  return (frame->n_vectors);
+}
+
+/* packet trace format function */
+static u8 *
+hicn_data_pcslookup_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_data_pcslookup_trace_t *t =
+    va_arg (*args, hicn_data_pcslookup_trace_t *);
+
+  s = format (s, "DATA-PCSLOOKUP: pkt: %d, sw_if_index %d, next index %d",
+	      (int) t->pkt_type, t->sw_if_index, t->next_index);
+  return (s);
+}
+
+/*
+ * Node registration for the data forwarder node
+ */
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(hicn_data_pcslookup_node) =
+{
+  .function = hicn_data_pcslookup_node_fn,
+  .name = "hicn-data-pcslookup",
+  .vector_size = sizeof(u32),
+  .runtime_data_bytes = sizeof(hicn_data_pcslookup_runtime_t),
+  .format_trace = hicn_data_pcslookup_format_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN(hicn_data_pcslookup_error_strings),
+  .error_strings = hicn_data_pcslookup_error_strings,
+  .n_next_nodes = HICN_DATA_PCSLOOKUP_N_NEXT,
+  .next_nodes = {
+    [HICN_DATA_PCSLOOKUP_NEXT_DATA_FWD] = "hicn-data-fwd",
+    [HICN_DATA_PCSLOOKUP_NEXT_ERROR_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */