/* * Copyright (c) 2017-2021 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 */ 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", }, }; /* * fd.io coding-style-patch-verification: ON * * Local Variables: eval: (c-set-style "gnu") End: */