/* * Copyright (c) 2016 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/bier/bier_disp_table.h> #include <vnet/bier/bier_hdr_inlines.h> /** * @brief A struct to hold tracing information for the MPLS label imposition * node. */ typedef struct bier_disp_lookup_trace_t_ { /** * BIER source BP used in the lookup - host order */ bier_bp_t bp; /** * BIER disp table */ index_t bdti; } bier_disp_lookup_trace_t; /** * Next nodes from BIER disposition lookup */ typedef enum bier_disp_lookup_next_t_ { BIER_DISP_LOOKUP_NEXT_DROP, BIER_DISP_LOOKUP_NEXT_DISPATCH, } bier_disp_lookup_next_t; #define BIER_DISP_LOOKUP_N_NEXT (BIER_DISP_LOOKUP_NEXT_DISPATCH+1) always_inline uword bier_disp_lookup_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { u32 n_left_from, next_index, * from, * to_next; from = vlib_frame_vector_args (from_frame); n_left_from = 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) { const bier_hdr_t *hdr0; bier_hdr_src_id_t src0; vlib_buffer_t * b0; u32 bdei0, bdti0; u32 next0, bi0; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); bdti0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX]; hdr0 = vlib_buffer_get_current(b0); /* * lookup - source is in network order. */ src0 = bier_hdr_get_src_id(hdr0); next0 = BIER_DISP_LOOKUP_NEXT_DISPATCH; bdei0 = bier_disp_table_lookup(bdti0, src0); if (PREDICT_FALSE(INDEX_INVALID == bdei0)) { /* * if a specific match misses, try the default */ bdei0 = bier_disp_table_lookup(bdti0, 0); if (PREDICT_FALSE(INDEX_INVALID == bdei0)) { next0 = BIER_DISP_LOOKUP_NEXT_DROP; } } vnet_buffer(b0)->ip.adj_index[VLIB_TX] = bdei0; if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) { bier_disp_lookup_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->bp = clib_net_to_host_u16(bier_hdr_get_src_id(hdr0)); tr->bdti = bdti0; } 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); } return from_frame->n_vectors; } static u8 * format_bier_disp_lookup_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 *); bier_disp_lookup_trace_t * t; t = va_arg (*args, bier_disp_lookup_trace_t *); s = format (s, "tbl:%d src:%d", t->bdti, t->bp); return (s); } VLIB_NODE_FN (bier_disp_lookup_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return (bier_disp_lookup_inline(vm, node, frame)); } VLIB_REGISTER_NODE (bier_disp_lookup_node) = { .name = "bier-disp-lookup", .vector_size = sizeof (u32), .format_trace = format_bier_disp_lookup_trace, .n_next_nodes = BIER_DISP_LOOKUP_N_NEXT, .next_nodes = { [BIER_DISP_LOOKUP_NEXT_DROP] = "bier-drop", [BIER_DISP_LOOKUP_NEXT_DISPATCH] = "bier-disp-dispatch", } };