/* * 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. */ /** * bier_imposition : The BIER imposition object * * A BIER imposition object is present in the IP mcast output list * and represents the imposition of a BIER bitmask. After BIER header * imposition the packet is forward within the appropriate/specified * BIER table */ #ifndef __BIER_IMPOSITION_H__ #define __BIER_IMPOSITION_H__ #include <vnet/bier/bier_types.h> #include <vnet/fib/fib_types.h> #include <vnet/dpo/dpo.h> /** * The BIER imposition object */ typedef struct bier_imp_t_ { /** * Required for pool_get_aligned */ CLIB_CACHE_LINE_ALIGN_MARK(cacheline0); /** * The DPO contributed from the resolving BIER table. * One per-IP protocol. This allows us to share a BIER imposition * object for a IPv4 and IPv6 mfib path. */ dpo_id_t bi_dpo[FIB_PROTOCOL_IP_MAX]; /** * The Header to impose. */ bier_hdr_t bi_hdr; /** * The bit string. * This is a memory v. speed tradeoff. We inline here the * largest header type so as the bitstring is on the same * cacheline as the header. */ u8 bi_bits[BIER_HDR_BUCKETS_1024]; /** * The BIER table into which to forward the post imposed packet */ bier_table_id_t bi_tbl; /** * number of locks */ u32 bi_locks; } bier_imp_t; extern index_t bier_imp_add_or_lock(const bier_table_id_t *bt, bier_bp_t sender, const bier_bit_string_t *bs); extern void bier_imp_unlock(index_t bii); extern void bier_imp_lock(index_t bii); extern u8* format_bier_imp(u8* s, va_list *ap); extern void bier_imp_contribute_forwarding(index_t bii, dpo_proto_t proto, dpo_id_t *dpo); extern bier_imp_t *bier_imp_pool; always_inline bier_imp_t* bier_imp_get (index_t bii) { return (pool_elt_at_index(bier_imp_pool, bii)); } #endif