/* * 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. */ #ifndef __MPLS_DISP_DPO_H__ #define __MPLS_DISP_DPO_H__ #include <vnet/vnet.h> #include <vnet/mpls/packet.h> #include <vnet/dpo/dpo.h> #include <vnet/mfib/mfib_types.h> /** * A representation of an MPLS label for imposition in the data-path */ typedef struct mpls_disp_dpo_t { /** * required for pool_get_aligned. * memebers used in the switch path come first! */ CLIB_CACHE_LINE_ALIGN_MARK(cacheline0); /** * Next DPO in the graph */ dpo_id_t mdd_dpo; /** * The protocol of the payload/packets that are being encapped */ dpo_proto_t mdd_payload_proto; /** * RPF-ID (if this is an mcast disposition) */ fib_rpf_id_t mdd_rpf_id; /** * Number of locks/users of the label */ u16 mdd_locks; /** * LSP mode */ fib_mpls_lsp_mode_t mdd_mode; } mpls_disp_dpo_t; /** * @brief Assert that the MPLS label object is less than a cache line in size. * Should this get any bigger then we will need to reconsider how many labels * can be pushed in one object. */ _Static_assert((sizeof(mpls_disp_dpo_t) <= CLIB_CACHE_LINE_BYTES), "MPLS Disposition DPO is larger than one cache line."); /** * @brief Create an MPLS label object * * @param payload_proto The ptocool of the payload packets that will * be imposed with this label header. * @param rpf_id The RPF ID the packet will aquire - only for mcast * @param mode The LSP mode; pipe or uniform * @param dpo The parent of the created MPLS label object */ extern void mpls_disp_dpo_create(dpo_proto_t payload_proto, fib_rpf_id_t rpf_id, fib_mpls_lsp_mode_t mode, const dpo_id_t *parent, dpo_id_t *dpo); extern u8* format_mpls_disp_dpo(u8 *s, va_list *args); /* * Encapsulation violation for fast data-path access */ extern mpls_disp_dpo_t *mpls_disp_dpo_pool; static inline mpls_disp_dpo_t * mpls_disp_dpo_get (index_t index) { return (pool_elt_at_index(mpls_disp_dpo_pool, index)); } extern void mpls_disp_dpo_module_init(void); #endif