/* * 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. */ /** * @brief */ #ifndef __LOAD_BALANCE_MAP_H__ #define __LOAD_BALANCE_MAP_H__ #include <vlib/vlib.h> #include <vnet/fib/fib_types.h> #include <vnet/dpo/load_balance.h> struct load_balance_map_path_t_; /** */ typedef struct load_balance_map_t_ { /** * required for pool_get_aligned. * memebers used in the switch path come first! */ CLIB_CACHE_LINE_ALIGN_MARK(cacheline0); /** * The buckets of the map that provide the index to index translation. * In the first cacheline. */ u16 *lbm_buckets; /** * the vector of paths this MAP represents */ struct load_balance_map_path_t_ *lbm_paths; /** * the sum of the normalised weights. cache for convenience */ u32 lbm_sum_of_norm_weights; /** * Number of locks. Maps are shared by a large number of recrusvie fib_entry_ts */ u32 lbm_locks; } load_balance_map_t; extern index_t load_balance_map_add_or_lock(u32 n_buckets, u32 sum_of_weights, const load_balance_path_t *norm_paths); extern void load_balance_map_lock(index_t lmbi); extern void load_balance_map_unlock(index_t lbmi); extern void load_balance_map_path_state_change(fib_node_index_t path_index); extern u8* format_load_balance_map(u8 *s, va_list *ap); extern void load_balance_map_show_mem(void); /** * The encapsulation breakages are for fast DP access */ extern load_balance_map_t *load_balance_map_pool; static inline load_balance_map_t* load_balance_map_get (index_t lbmi) { return (pool_elt_at_index(load_balance_map_pool, lbmi)); } static inline u16 load_balance_map_translate (index_t lbmi, u16 bucket) { load_balance_map_t*lbm; lbm = load_balance_map_get(lbmi); return (lbm->lbm_buckets[bucket]); } static inline const dpo_id_t * load_balance_get_fwd_bucket (const load_balance_t *lb, u16 bucket) { ASSERT(bucket < lb->lb_n_buckets); if (INDEX_INVALID != lb->lb_map) { bucket = load_balance_map_translate(lb->lb_map, bucket); } if (PREDICT_TRUE(LB_HAS_INLINE_BUCKETS(lb))) { return (&lb->lb_buckets_inline[bucket]); } else { return (&lb->lb_buckets[bucket]); } } extern void load_balance_map_module_init(void); #endif