/* * 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 __FIB_PATH_LIST_H__ #define __FIB_PATH_LIST_H__ #include <vlib/vlib.h> #include <vnet/adj/adj.h> #include <vnet/fib/fib_node.h> #include <vnet/fib/fib_path.h> /** * Enumeration of path-list flags. */ typedef enum fib_path_list_attribute_t_ { /** * Marker. Add new flags after this one. */ FIB_PATH_LIST_ATTRIBUTE_FIRST = 0, /** * This path list is shareable. Shareable path-lists * are inserted into the path-list data-base. * All path-list are inherently shareable, the reason we share some and * not others is to limit the size of the path-list database. This DB must * be searched for each route update. */ FIB_PATH_LIST_ATTRIBUTE_SHARED = FIB_PATH_LIST_ATTRIBUTE_FIRST, /** * explicit drop path-list. Used when the entry source needs to * force a drop, despite the fact the path info is present. */ FIB_PATH_LIST_ATTRIBUTE_DROP, /** * explicit local path-list. */ FIB_PATH_LIST_ATTRIBUTE_LOCAL, /** * exclusive path-list. Exclusive means the path will resolve via the * exclusive (user provided) adj. */ FIB_PATH_LIST_ATTRIBUTE_EXCLUSIVE, /** * resolved path-list */ FIB_PATH_LIST_ATTRIBUTE_RESOLVED, /** * looped path-list. one path looped implies the whole list is */ FIB_PATH_LIST_ATTRIBUTE_LOOPED, /** * a popular path-ist is one that is shared amongst many entries. * Path list become popular as they gain more children, but they * don't become unpopular as they lose them. */ FIB_PATH_LIST_ATTRIBUTE_POPULAR, /** * no uRPF - do not generate unicast RPF list for this path-list */ FIB_PATH_LIST_ATTRIBUTE_NO_URPF, /** * Marher. Add new flags before this one, and then update it. */ FIB_PATH_LIST_ATTRIBUTE_LAST = FIB_PATH_LIST_ATTRIBUTE_NO_URPF, } fib_path_list_attribute_t; typedef enum fib_path_list_flags_t_ { FIB_PATH_LIST_FLAG_NONE = 0, FIB_PATH_LIST_FLAG_SHARED = (1 << FIB_PATH_LIST_ATTRIBUTE_SHARED), FIB_PATH_LIST_FLAG_DROP = (1 << FIB_PATH_LIST_ATTRIBUTE_DROP), FIB_PATH_LIST_FLAG_LOCAL = (1 << FIB_PATH_LIST_ATTRIBUTE_LOCAL), FIB_PATH_LIST_FLAG_EXCLUSIVE = (1 << FIB_PATH_LIST_ATTRIBUTE_EXCLUSIVE), FIB_PATH_LIST_FLAG_RESOLVED = (1 << FIB_PATH_LIST_ATTRIBUTE_RESOLVED), FIB_PATH_LIST_FLAG_LOOPED = (1 << FIB_PATH_LIST_ATTRIBUTE_LOOPED), FIB_PATH_LIST_FLAG_POPULAR = (1 << FIB_PATH_LIST_ATTRIBUTE_POPULAR), FIB_PATH_LIST_FLAG_NO_URPF = (1 << FIB_PATH_LIST_ATTRIBUTE_NO_URPF), } fib_path_list_flags_t; #define FIB_PATH_LIST_ATTRIBUTES { \ [FIB_PATH_LIST_ATTRIBUTE_SHARED] = "shared", \ [FIB_PATH_LIST_ATTRIBUTE_RESOLVED] = "resolved", \ [FIB_PATH_LIST_ATTRIBUTE_DROP] = "drop", \ [FIB_PATH_LIST_ATTRIBUTE_EXCLUSIVE] = "exclusive", \ [FIB_PATH_LIST_ATTRIBUTE_LOCAL] = "local", \ [FIB_PATH_LIST_ATTRIBUTE_LOOPED] = "looped", \ [FIB_PATH_LIST_ATTRIBUTE_POPULAR] = "popular", \ [FIB_PATH_LIST_ATTRIBUTE_NO_URPF] = "no-uRPF", \ } #define FOR_EACH_PATH_LIST_ATTRIBUTE(_item) \ for (_item = FIB_PATH_LIST_ATTRIBUTE_FIRST; \ _item <= FIB_PATH_LIST_ATTRIBUTE_LAST; \ _item++) extern fib_node_index_t fib_path_list_create(fib_path_list_flags_t flags, const fib_route_path_t *paths); extern fib_node_index_t fib_path_list_create_special(dpo_proto_t nh_proto, fib_path_list_flags_t flags, const dpo_id_t *dpo); extern fib_node_index_t fib_path_list_copy_and_path_add( fib_node_index_t pl_index, fib_path_list_flags_t flags, const fib_route_path_t *path); extern fib_node_index_t fib_path_list_copy_and_path_remove( fib_node_index_t pl_index, fib_path_list_flags_t flags, const fib_route_path_t *path); extern fib_node_index_t fib_path_list_path_add ( fib_node_index_t path_list_index, const fib_route_path_t *rpaths); extern fib_node_index_t fib_path_list_path_remove ( fib_node_index_t path_list_index, const fib_route_path_t *rpaths); extern u32 fib_path_list_get_n_paths(fib_node_index_t pl_index); /** * Flags to control how the path-list returns forwarding information */ typedef enum fib_path_list_fwd_flags_t_ { FIB_PATH_LIST_FWD_FLAG_NONE = 0, FIB_PATH_LIST_FWD_FLAG_COLLAPSE = (1 << 0), FIB_PATH_LIST_FWD_FLAG_STICKY = (1 << 1), } fib_path_list_fwd_flags_t; extern void fib_path_list_contribute_forwarding(fib_node_index_t path_list_index, fib_forward_chain_type_t type, fib_path_list_fwd_flags_t flags, dpo_id_t *dpo); extern void fib_path_list_contribute_urpf(fib_node_index_t path_index, index_t urpf); extern index_t fib_path_list_get_urpf(fib_node_index_t path_list_index); extern index_t fib_path_list_get_adj(fib_node_index_t path_list_index, fib_forward_chain_type_t type); extern u32 fib_path_list_child_add(fib_node_index_t pl_index, fib_node_type_t type, fib_node_index_t child_index); extern void fib_path_list_child_remove(fib_node_index_t pl_index, fib_node_index_t sibling_index); extern void fib_path_list_back_walk(fib_node_index_t pl_index, fib_node_back_walk_ctx_t *ctx); extern void fib_path_list_lock(fib_node_index_t pl_index); extern void fib_path_list_unlock(fib_node_index_t pl_index); extern int fib_path_list_recursive_loop_detect(fib_node_index_t path_list_index, fib_node_index_t **entry_indicies); extern u32 fib_path_list_get_resolving_interface(fib_node_index_t path_list_index); extern int fib_path_list_is_looped(fib_node_index_t path_list_index); extern int fib_path_list_is_popular(fib_node_index_t path_list_index); extern dpo_proto_t fib_path_list_get_proto(fib_node_index_t path_list_index); extern u8 * fib_path_list_format(fib_node_index_t pl_index, u8 * s); extern u8 * format_fib_path_list(u8 * s, va_list *args); extern index_t fib_path_list_lb_map_add_or_lock(fib_node_index_t pl_index, const fib_node_index_t *pis); extern u32 fib_path_list_find_rpath (fib_node_index_t path_list_index, const fib_route_path_t *rpath); /** * A callback function type for walking a path-list's paths */ typedef fib_path_list_walk_rc_t (*fib_path_list_walk_fn_t)( fib_node_index_t pl_index, fib_node_index_t path_index, void *ctx); extern void fib_path_list_walk(fib_node_index_t pl_index, fib_path_list_walk_fn_t func, void *ctx); extern void fib_path_list_module_init(void); extern void fib_path_list_module_init(void); /* * functions for testing. */ u32 fib_path_list_pool_size(void); u32 fib_path_list_db_size(void); #endif