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-rwxr-xr-xhicn-plugin/src/data_fwd_node.c541
1 files changed, 541 insertions, 0 deletions
diff --git a/hicn-plugin/src/data_fwd_node.c b/hicn-plugin/src/data_fwd_node.c
new file mode 100755
index 000000000..088683fe0
--- /dev/null
+++ b/hicn-plugin/src/data_fwd_node.c
@@ -0,0 +1,541 @@
+/*
+ * 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 <vnet/dpo/dpo.h>
+
+#include "data_fwd.h"
+#include "mgmt.h"
+#include "parser.h"
+#include "infra.h"
+#include "strategy.h"
+#include "strategy_dpo_manager.h"
+#include "state.h"
+#include "error.h"
+
+/* Stats string values */
+static char *hicn_data_fwd_error_strings[] = {
+#define _(sym, string) string,
+ foreach_hicnfwd_error
+#undef _
+};
+
+/* Declarations */
+always_inline void
+drop_packet (vlib_main_t * vm, u32 bi0,
+ u32 * n_left_to_next, u32 * next0, u32 ** to_next,
+ u32 * next_index, vlib_node_runtime_t * node);
+
+always_inline int
+hicn_satisfy_faces (vlib_main_t * vm, u32 b0,
+ hicn_pcs_entry_t * pitp, u32 * n_left_to_next,
+ u32 ** to_next, u32 * next_index,
+ vlib_node_runtime_t * node, u8 isv6,
+ vl_api_hicn_api_node_stats_get_reply_t * stats);
+
+always_inline void
+clone_data_to_cs (vlib_main_t * vm, hicn_pit_cs_t * pitcs,
+ hicn_pcs_entry_t * pitp, hicn_header_t * hicn0, f64 tnow,
+ hicn_hash_node_t * nodep, vlib_buffer_t * b0,
+ hicn_hash_entry_t * hash_entry, u64 name_hash,
+ hicn_buffer_t * hicnb, const hicn_dpo_vft_t * dpo_vft,
+ dpo_id_t * hicn_dpo_id);
+
+
+/* packet trace format function */
+always_inline u8 *hicn_data_fwd_format_trace (u8 * s, va_list * args);
+
+vlib_node_registration_t hicn_data_fwd_node;
+
+/*
+ * ICN forwarder node for interests: handling of Data delivered based on ACL.
+ * - 1 packet at a time - ipv4/tcp ipv6/tcp
+ */
+static uword
+hicn_data_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+
+ u32 n_left_from, *from, *to_next;
+ hicn_data_fwd_next_t next_index;
+ hicn_pit_cs_t *pitcs = &hicn_main.pitcs;
+ vl_api_hicn_api_node_stats_get_reply_t stats = { 0 };
+ f64 tnow;
+ u32 data_received = 1;
+
+ 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_DATA_FWD_NEXT_ERROR_DROP;
+ hicn_name_t name;
+ hicn_header_t *hicn0;
+ hicn_buffer_t *hicnb0;
+ hicn_hash_node_t *node0;
+ const hicn_strategy_vft_t *strategy_vft0;
+ const hicn_dpo_vft_t *dpo_vft0;
+ u8 dpo_ctx_id0;
+ hicn_pcs_entry_t *pitp;
+ hicn_hash_entry_t *hash_entry0;
+ int ret = HICN_ERROR_NONE;
+
+ /* Prefetch for next iteration. */
+ if (n_left_from > 1)
+ {
+ vlib_buffer_t *b1;
+ b1 = vlib_get_buffer (vm, from[1]);
+ CLIB_PREFETCH (b1, 2 * CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (b1->data, CLIB_CACHE_LINE_BYTES, STORE);
+
+ /* HICN PREFETCH */
+ hicn_buffer_t *hicnb1 = hicn_get_buffer (b1);
+ hicn_prefetch_pcs_entry (hicnb1, pitcs);
+ }
+ /* Dequeue a packet buffer */
+ /*
+ * Do not copy the index in the next buffer, we'll do
+ * it later. The packet might be cloned, so the buffer to move
+ * to next must be the cloned one
+ */
+ bi0 = from[0];
+ from += 1;
+ n_left_from -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ /* Get hicn buffer and state */
+ hicnb0 = hicn_get_buffer (b0);
+ hicn_get_internal_state (hicnb0, pitcs, &node0, &strategy_vft0,
+ &dpo_vft0, &dpo_ctx_id0, &hash_entry0);
+
+ ret = hicn_data_parse_pkt (b0, &name, &namelen, &hicn0, &isv6);
+ pitp = hicn_pit_get_data (node0);
+ nameptr = (u8 *) (&name);
+
+ if (PREDICT_FALSE
+ (ret != HICN_ERROR_NONE
+ || !hicn_node_compare (nameptr, namelen, node0)
+ || (hash_entry0->he_flags & HICN_HASH_ENTRY_FLAG_CS_ENTRY)))
+ {
+ /*
+ * Remove the lock acquired from
+ * data_pcslookup node
+ */
+ dpo_id_t hicn_dpo_id0 = { dpo_vft0->hicn_dpo_get_type (), 0, 0,
+ dpo_ctx_id0
+ };
+ hicn_pcs_remove_lock (pitcs, &pitp, &node0, vm,
+ hash_entry0, dpo_vft0, &hicn_dpo_id0);
+
+ drop_packet (vm, bi0, &n_left_to_next, &next0, &to_next,
+ &next_index, node);
+
+ goto end_processing;
+ }
+ /*
+ * Check if the hit is instead a collision in the
+ * hash table. Unlikely to happen.
+ */
+ /*
+ * there is no guarantee that the type of entry has
+ * not changed from the lookup.
+ */
+
+ if (tnow > pitp->shared.expire_time)
+ {
+ dpo_id_t hicn_dpo_id0 =
+ { dpo_vft0->hicn_dpo_get_type (), 0, 0, dpo_ctx_id0 };
+ hicn_pcs_delete (pitcs, &pitp, &node0, vm, hash_entry0,
+ dpo_vft0, &hicn_dpo_id0);
+
+ drop_packet (vm, bi0, &n_left_to_next, &next0, &to_next,
+ &next_index, node);
+ stats.pit_expired_count++;
+ }
+ else
+ {
+ ASSERT ((hash_entry0->he_flags & HICN_HASH_ENTRY_FLAG_DELETED)
+ == 0);
+
+ data_received++;
+ /*
+ * We do not check if the data is coming from
+ * the outgoing interest face.
+ */
+
+ /* Prepare the buffer for the cloning */
+ ret = hicn_satisfy_faces (vm, bi0, pitp, &n_left_to_next,
+ &to_next, &next_index, node,
+ isv6, &stats);
+
+ dpo_id_t hicn_dpo_id0 = { dpo_vft0->hicn_dpo_get_type (), 0, 0,
+ dpo_ctx_id0
+ };
+
+ if (PREDICT_FALSE (ret != HICN_ERROR_NONE))
+ {
+ hicn_pcs_pit_delete (pitcs, &pitp, &node0, vm,
+ hash_entry0, dpo_vft0, &hicn_dpo_id0);
+ continue;
+ }
+ /*
+ * Call the strategy callback since the
+ * interest has been satisfied
+ */
+ strategy_vft0->hicn_receive_data (dpo_ctx_id0,
+ pitp->u.pit.pe_txnh);
+
+#if HICN_FEATURE_CS
+ /*
+ * Clone data packet in the content store and
+ * convert the PIT entry into a CS entry
+ */
+ clone_data_to_cs (vm, pitcs, pitp, hicn0, tnow, node0,
+ b0, hash_entry0, hicnb0->name_hash, hicnb0,
+ dpo_vft0, &hicn_dpo_id0);
+
+ hicn_pcs_remove_lock (pitcs, &pitp, &node0, vm,
+ hash_entry0, NULL, NULL);
+#else
+ ASSERT (pitp == hicn_pit_get_data (node0));
+ /*
+ * Remove one reference as the buffer is no
+ * longer in any frame
+ */
+ b0->n_add_refs--;
+ /* If not enabled, delete the PIT entry */
+ hicn_pcs_pit_delete (pitcs, &pitp, &node0, vm,
+ hash_entry0, dpo_vft0, &hicn_dpo_id0);
+#endif
+ }
+ end_processing:
+
+ /* Incr packet counter */
+ stats.pkts_processed += 1;
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ u32 pit_int_count = hicn_pit_get_int_count (pitcs);
+ u32 pit_cs_count = hicn_pit_get_cs_count (pitcs);
+
+ vlib_node_increment_counter (vm, hicn_data_fwd_node.index,
+ HICNFWD_ERROR_DATAS, stats.pkts_data_count);
+
+
+ update_node_counter (vm, hicn_data_fwd_node.index,
+ HICNFWD_ERROR_INT_COUNT, pit_int_count);
+ update_node_counter (vm, hicn_data_fwd_node.index,
+ HICNFWD_ERROR_CS_COUNT, pit_cs_count);
+ update_node_counter (vm, hicn_data_fwd_node.index,
+ HICNFWD_ERROR_INTEREST_AGG_ENTRY,
+ stats.pkts_data_count / data_received);
+
+ return (frame->n_vectors);
+}
+
+always_inline void
+drop_packet (vlib_main_t * vm, u32 bi0,
+ u32 * n_left_to_next, u32 * next0, u32 ** to_next,
+ u32 * next_index, vlib_node_runtime_t * node)
+{
+ *next0 = HICN_DATA_FWD_NEXT_ERROR_DROP;
+
+ (*to_next)[0] = bi0;
+ *to_next += 1;
+ *n_left_to_next -= 1;
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, *next_index,
+ *to_next, *n_left_to_next, bi0, *next0);
+}
+
+always_inline int
+hicn_satisfy_faces (vlib_main_t * vm, u32 bi0,
+ hicn_pcs_entry_t * pitp, u32 * n_left_to_next,
+ u32 ** to_next, u32 * next_index,
+ vlib_node_runtime_t * node, u8 isv6,
+ vl_api_hicn_api_node_stats_get_reply_t * stats)
+{
+ int found = 0;
+ int ret = HICN_ERROR_NONE;
+ u32 *clones = NULL, *header = NULL;
+ u32 n_left_from = 0;
+ u32 next0 = HICN_DATA_FWD_NEXT_ERROR_DROP, next1 =
+ HICN_DATA_FWD_NEXT_ERROR_DROP;
+
+ /*
+ * We have a hard limit on the number of vlib_buffer that we can
+ * chain (no more than 256)
+ */
+ /*
+ * The first group of vlib_buffer can be directly cloned from b0. We
+ * need to be careful to clone it only 254 times as the buffer
+ * already has n_add_reds=1.
+ */
+ vec_alloc (clones, pitp->u.pit.faces.n_faces);
+ header = clones;
+
+ /* Clone bi0 */
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+
+ /* Add one reference to maintain the buffer in the CS */
+ b0->n_add_refs++;
+ found = n_left_from =
+ vlib_buffer_clone2 (vm, bi0, clones, pitp->u.pit.faces.n_faces,
+ VLIB_BUFFER_MIN_CHAIN_SEG_SIZE);
+
+ ASSERT (n_left_from == pitp->u.pit.faces.n_faces);
+
+ /* Index to iterate over the faces */
+ int i = 0;
+
+ while (n_left_from > 0)
+ {
+
+ //Dual loop, X2
+ while (n_left_from >= 4 && *n_left_to_next >= 2)
+ {
+ vlib_buffer_t *h0, *h1;
+ u32 hi0, hi1;
+ dpo_id_t *face0, *face1;
+
+ /* Prefetch for next iteration. */
+ {
+ vlib_buffer_t *h2, *h3;
+ h2 = vlib_get_buffer (vm, clones[2]);
+ h3 = vlib_get_buffer (vm, clones[3]);
+ CLIB_PREFETCH (h2, 2 * CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (h3, 2 * CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ face0 = hicn_face_db_get_dpo_face (i++, &pitp->u.pit.faces);
+ face1 = hicn_face_db_get_dpo_face (i++, &pitp->u.pit.faces);
+
+ h0 = vlib_get_buffer (vm, clones[0]);
+ h1 = vlib_get_buffer (vm, clones[1]);
+
+ (*to_next)[0] = hi0 = clones[0];
+ (*to_next)[1] = hi1 = clones[1];
+ *to_next += 2;
+ *n_left_to_next -= 2;
+ n_left_from -= 2;
+ clones += 2;
+
+ next0 = face0->dpoi_next_node;
+ next1 = face1->dpoi_next_node;
+ vnet_buffer (h0)->ip.adj_index[VLIB_TX] = face0->dpoi_index;
+ vnet_buffer (h1)->ip.adj_index[VLIB_TX] = face1->dpoi_index;
+
+ stats->pkts_data_count += 2;
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (h0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ hicn_data_fwd_trace_t *t =
+ vlib_add_trace (vm, node, h0, sizeof (*t));
+ t->pkt_type = HICN_PKT_TYPE_CONTENT;
+ t->sw_if_index = vnet_buffer (h0)->sw_if_index[VLIB_RX];
+ t->next_index = next0;
+ clib_memcpy (t->packet_data,
+ vlib_buffer_get_current (h0),
+ sizeof (t->packet_data));
+ }
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (h1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ hicn_data_fwd_trace_t *t =
+ vlib_add_trace (vm, node, h1, sizeof (*t));
+ t->pkt_type = HICN_PKT_TYPE_CONTENT;
+ t->sw_if_index = vnet_buffer (h1)->sw_if_index[VLIB_RX];
+ t->next_index = next1;
+ clib_memcpy (t->packet_data,
+ vlib_buffer_get_current (h1),
+ sizeof (t->packet_data));
+ }
+ vlib_validate_buffer_enqueue_x2 (vm, node, *next_index,
+ *to_next, *n_left_to_next,
+ hi0, hi1, next0, next1);
+ }
+
+
+ while (n_left_from > 0 && *n_left_to_next > 0)
+ {
+ vlib_buffer_t *h0;
+ u32 hi0;
+ dpo_id_t *face0;
+
+ face0 = hicn_face_db_get_dpo_face (i++, &pitp->u.pit.faces);
+
+ h0 = vlib_get_buffer (vm, clones[0]);
+
+ (*to_next)[0] = hi0 = clones[0];
+ *to_next += 1;
+ *n_left_to_next -= 1;
+ n_left_from -= 1;
+ clones += 1;
+ next0 = face0->dpoi_next_node;
+ vnet_buffer (h0)->ip.adj_index[VLIB_TX] = face0->dpoi_index;
+
+ stats->pkts_data_count++;
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (h0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ hicn_data_fwd_trace_t *t =
+ vlib_add_trace (vm, node, h0, sizeof (*t));
+ t->pkt_type = HICN_PKT_TYPE_CONTENT;
+ t->sw_if_index = vnet_buffer (h0)->sw_if_index[VLIB_RX];
+ t->next_index = next0;
+ clib_memcpy (t->packet_data,
+ vlib_buffer_get_current (h0),
+ sizeof (t->packet_data));
+ }
+ /*
+ * 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,
+ hi0, next0);
+
+ }
+
+ /* Ensure that there is space for the next clone (if any) */
+ if (PREDICT_FALSE (*n_left_to_next == 0))
+ {
+ vlib_put_next_frame (vm, node, *next_index, *n_left_to_next);
+
+ vlib_get_next_frame (vm, node, *next_index, *to_next,
+ *n_left_to_next);
+ }
+ }
+
+
+ vec_free (header);
+
+ if (PREDICT_FALSE (!found))
+ {
+ ASSERT (0);
+ drop_packet (vm, bi0, n_left_to_next, &next0, to_next, next_index,
+ node);
+ ret = HICN_ERROR_FACE_NOT_FOUND;
+ }
+ return ret;
+}
+
+always_inline void
+clone_data_to_cs (vlib_main_t * vm, hicn_pit_cs_t * pitcs,
+ hicn_pcs_entry_t * pitp, hicn_header_t * hicn0, f64 tnow,
+ hicn_hash_node_t * nodep, vlib_buffer_t * b0,
+ hicn_hash_entry_t * hash_entry, u64 name_hash,
+ hicn_buffer_t * hicnb, const hicn_dpo_vft_t * dpo_vft,
+ dpo_id_t * hicn_dpo_id)
+{
+ hicn_lifetime_t dmsg_lifetime;
+ /*
+ * At this point we think we're safe to proceed. Store the CS buf in
+ * the PIT/CS hashtable entry
+ */
+
+ /*
+ * Start turning the PIT into a CS. Note that we may be stepping on
+ * the PIT part of the union as we update the CS part, so don't
+ * expect the PIT part to be valid after this point.
+ */
+ hicn_buffer_t *hicnb0 = hicn_get_buffer (b0);
+ hicn_pit_to_cs (vm, pitcs, pitp, hash_entry, nodep, dpo_vft, hicn_dpo_id,
+ &hicnb->face_dpo_id, hicnb0->is_appface);
+
+ pitp->shared.create_time = tnow;
+
+ hicn_type_t type = hicnb0->type;
+ hicn_ops_vft[type.l1]->get_lifetime (type, &hicn0->protocol,
+ &dmsg_lifetime);
+
+ if (dmsg_lifetime < HICN_PARAM_CS_LIFETIME_MIN
+ || dmsg_lifetime > HICN_PARAM_CS_LIFETIME_MAX)
+ {
+ dmsg_lifetime = HICN_PARAM_CS_LIFETIME_DFLT;
+ }
+ pitp->shared.expire_time = hicn_pcs_get_exp_time (tnow, dmsg_lifetime);
+
+ /* Store the original packet buffer in the CS node */
+ pitp->u.cs.cs_pkt_buf = vlib_get_buffer_index (vm, b0);
+}
+
+/* packet trace format function */
+always_inline u8 *
+hicn_data_fwd_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_fwd_trace_t *t = va_arg (*args, hicn_data_fwd_trace_t *);
+ u32 indent = format_get_indent (s);
+
+ s = format (s, "DATAFWD: pkt: %d, sw_if_index %d, next index %d\n",
+ (int) t->pkt_type, t->sw_if_index, t->next_index);
+
+ s = format (s, "%U%U", format_white_space, indent,
+ format_ip6_header, t->packet_data, sizeof (t->packet_data));
+ return (s);
+}
+
+/*
+ * Node registration for the data forwarder node
+ */
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(hicn_data_fwd_node) =
+{
+ .function = hicn_data_node_fn,
+ .name = "hicn-data-fwd",
+ .vector_size = sizeof(u32),
+ .runtime_data_bytes = sizeof(hicn_data_fwd_runtime_t),
+ .format_trace = hicn_data_fwd_format_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(hicn_data_fwd_error_strings),
+ .error_strings = hicn_data_fwd_error_strings,
+ .n_next_nodes = HICN_DATA_FWD_N_NEXT,
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [HICN_DATA_FWD_NEXT_V4_LOOKUP] = "ip4-lookup",
+ [HICN_DATA_FWD_NEXT_V6_LOOKUP] = "ip6-lookup",
+ [HICN_DATA_FWD_NEXT_ERROR_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */