/* * 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 __MFIB_TABLE_H__ #define __MFIB_TABLE_H__ #include <vnet/ip/ip.h> #include <vnet/adj/adj.h> #include <vnet/dpo/replicate_dpo.h> #include <vnet/mfib/mfib_types.h> /** * Keep a lock per-source and a total */ #define MFIB_TABLE_N_LOCKS (MFIB_N_SOURCES+1) #define MFIB_TABLE_TOTAL_LOCKS MFIB_N_SOURCES /** * Flags for the source data */ typedef enum mfib_table_attribute_t_ { /** * Marker. Add new values after this one. */ MFIB_TABLE_ATTRIBUTE_FIRST, /** * the table is currently resync-ing */ MFIB_TABLE_ATTRIBUTE_RESYNC = MFIB_TABLE_ATTRIBUTE_FIRST, /** * Marker. add new entries before this one. */ MFIB_TABLE_ATTRIBUTE_LAST = MFIB_TABLE_ATTRIBUTE_RESYNC, } mfib_table_attribute_t; #define MFIB_TABLE_ATTRIBUTE_MAX (MFIB_TABLE_ATTRIBUTE_LAST+1) #define MFIB_TABLE_ATTRIBUTES { \ [MFIB_TABLE_ATTRIBUTE_RESYNC] = "resync", \ } #define FOR_EACH_MFIB_TABLE_ATTRIBUTE(_item) \ for (_item = MFIB_TABLE_ATTRIBUTE_FIRST; \ _item < MFIB_TABLE_ATTRIBUTE_MAX; \ _item++) typedef enum mfib_table_flags_t_ { MFIB_TABLE_FLAG_NONE = 0, MFIB_TABLE_FLAG_RESYNC = (1 << MFIB_TABLE_ATTRIBUTE_RESYNC), } __attribute__ ((packed)) mfib_table_flags_t; extern u8* format_mfib_table_flags(u8 *s, va_list *args); /** * @brief * A protocol Independent IP multicast FIB table */ typedef struct mfib_table_t_ { /** * Required for pool_get_aligned */ CLIB_CACHE_LINE_ALIGN_MARK(cacheline0); /** * A union of the protocol specific FIBs that provide the * underlying LPM mechanism. * This element is first in the struct so that it is in the * first cache line. */ union { ip4_mfib_t v4; ip6_mfib_t v6; }; /** * Which protocol this table serves. Used to switch on the union above. */ fib_protocol_t mft_proto; /** * table falgs */ mfib_table_flags_t mft_flags; /** * number of locks on the table */ u16 mft_locks[MFIB_TABLE_N_LOCKS]; /** * Table ID (hash key) for this FIB. */ u32 mft_table_id; /** * resync epoch */ u32 mft_epoch; /** * Index into FIB vector. */ fib_node_index_t mft_index; /** * Total route counters */ u32 mft_total_route_counts; /** * Table description */ u8* mft_desc; } mfib_table_t; /** * @brief * Format the description/name of the table */ extern u8* format_mfib_table_name(u8* s, va_list *ap); /** * @brief * Perfom a longest prefix match in the non-forwarding table * * @param fib_index * The index of the FIB * * @param prefix * The prefix to lookup * * @return * The index of the fib_entry_t for the best match, which may be the default route */ extern fib_node_index_t mfib_table_lookup(u32 fib_index, const mfib_prefix_t *prefix); /** * @brief * Perfom an exact match in the non-forwarding table * * @param fib_index * The index of the FIB * * @param prefix * The prefix to lookup * * @return * The index of the fib_entry_t for the exact match, or INVALID * is there is no match. */ extern fib_node_index_t mfib_table_lookup_exact_match(u32 fib_index, const mfib_prefix_t *prefix); /** * @brief * Add a new (with no replication) or lock an existing entry * * @param prefix * The prefix for the entry to add * * @return * the index of the fib_entry_t that is created (or existed already). */ extern fib_node_index_t mfib_table_entry_update(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, fib_rpf_id_t rpf_id, mfib_entry_flags_t flags); /** * @brief * Add n paths to an entry (aka route) in the FIB. If the entry does not * exist, it will be created. * See the documentation for fib_route_path_t for more descirptions of * the path parameters. * * @param fib_index * The index of the FIB * * @param prefix * The prefix for the entry to add * * @param source * The ID of the client/source adding the entry. * * @param flags * Flags for the entry. * * @param rpaths * A vector of paths. * * @return * the index of the fib_entry_t that is created (or existed already). */ extern fib_node_index_t mfib_table_entry_path_update(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, const fib_route_path_t *rpath); extern fib_node_index_t mfib_table_entry_paths_update(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, const fib_route_path_t *rpath); /** * @brief * Remove n paths to an entry (aka route) in the FIB. If this is the entry's * last path, then the entry will be removed, unless it has other sources. * See the documentation for fib_route_path_t for more descirptions of * the path parameters. * * @param fib_index * The index of the FIB * * @param prefix * The prefix for the entry to add * * @param source * The ID of the client/source adding the entry. * * @param rpaths * A vector of paths. */ extern void mfib_table_entry_path_remove(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, const fib_route_path_t *paths); extern void mfib_table_entry_paths_remove(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, const fib_route_path_t *paths); /** * @brief * Delete a FIB entry. If the entry has no more sources, then it is * removed from the table. * * @param fib_index * The index of the FIB * * @param prefix * The prefix for the entry to remove * * @param source * The ID of the client/source adding the entry. */ extern void mfib_table_entry_delete(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source); /** * @brief * Delete a FIB entry. If the entry has no more sources, then it is * removed from the table. * * @param entry_index * The index of the FIB entry * * @param source * The ID of the client/source adding the entry. */ extern void mfib_table_entry_delete_index(fib_node_index_t entry_index, mfib_source_t source); /** * @brief * Add a 'special' entry to the mFIB that links to the DPO passed * A special entry is an entry that the FIB is not expect to resolve * via the usual mechanisms (i.e. recurisve or neighbour adj DB lookup). * Instead the client/source provides the index of a replicate DPO to link to. * * @param fib_index * The index of the FIB * * @param prefix * The prefix to add * * @param source * The ID of the client/source adding the entry. * * @param flags * Flags for the entry. * * @param rep_dpo * The replicate DPO index to link to. * * @return * the index of the fib_entry_t that is created (or existed already). */ extern fib_node_index_t mfib_table_entry_special_add(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, mfib_entry_flags_t flags, index_t rep_dpo); /** * @brief * Flush all entries from a table for the source * * @param fib_index * The index of the FIB * * @paran proto * The protocol of the entries in the table * * @param source * the source to flush */ extern void mfib_table_flush(u32 fib_index, fib_protocol_t proto, mfib_source_t source); /** * @brief * Resync all entries from a table for the source * this is the mark part of the mark and sweep algorithm. * All entries in this FIB that are sourced by 'source' are marked * as stale. * * @param fib_index * The index of the FIB * * @paran proto * The protocol of the entries in the table * * @param source * the source to flush */ extern void mfib_table_mark(u32 fib_index, fib_protocol_t proto, mfib_source_t source); /** * @brief * Signal that the table has converged, i.e. all updates are complete. * this is the sweep part of the mark and sweep algorithm. * All entries in this FIB that are sourced by 'source' and marked * as stale are flushed. * * @param fib_index * The index of the FIB * * @paran proto * The protocol of the entries in the table * * @param source * the source to flush */ extern void mfib_table_sweep(u32 fib_index, fib_protocol_t proto, mfib_source_t source); /** * @brief * Get the index of the FIB bound to the interface * * @paran proto * The protocol of the FIB (and thus the entries therein) * * @param sw_if_index * The interface index * * @return fib_index * The index of the FIB */ extern u32 mfib_table_get_index_for_sw_if_index(fib_protocol_t proto, u32 sw_if_index); /** * @brief * Get the Table-ID of the FIB from protocol and index * * @param fib_index * The FIB index * * @paran proto * The protocol of the FIB (and thus the entries therein) * * @return fib_index * The tableID of the FIB */ extern u32 mfib_table_get_table_id(u32 fib_index, fib_protocol_t proto); /** * @brief * Get the index of the FIB for a Table-ID. This DOES NOT create the * FIB if it does not exist. * * @paran proto * The protocol of the FIB (and thus the entries therein) * * @param table-id * The Table-ID * * @return fib_index * The index of the FIB, which may be INVALID. */ extern u32 mfib_table_find(fib_protocol_t proto, u32 table_id); /** * @brief * Get the Table-ID of the FIB from protocol and index * * @param fib_index * The FIB index * * @paran proto * The protocol of the FIB (and thus the entries therein) * * @return fib_index * The tableID of the FIB */ extern u32 mfib_table_get_table_id(u32 fib_index, fib_protocol_t proto); /** * @brief * Get the index of the FIB for a Table-ID. This DOES create the * FIB if it does not exist. * * @paran proto * The protocol of the FIB (and thus the entries therein) * * @param table-id * The Table-ID * * @return fib_index * The index of the FIB * * @param source * The ID of the client/source. */ extern u32 mfib_table_find_or_create_and_lock(fib_protocol_t proto, u32 table_id, mfib_source_t source); /** * @brief * Get the index of the FIB for a Table-ID. This DOES create the * FIB if it does not exist. * * @paran proto * The protocol of the FIB (and thus the entries therein) * * @param table-id * The Table-ID * * @return fib_index * The index of the FIB * * @param source * The ID of the client/source. * * @param name * The client is choosing the name they want the table to have */ extern u32 mfib_table_find_or_create_and_lock_w_name(fib_protocol_t proto, u32 table_id, mfib_source_t source, const u8 *name); /** * @brief * Take a reference counting lock on the table * * @param fib_index * The index of the FIB * * @paran proto * The protocol of the FIB (and thus the entries therein) * * @param source * The ID of the client/source. */ extern void mfib_table_unlock(u32 fib_index, fib_protocol_t proto, mfib_source_t source); /** * @brief * Release a reference counting lock on the table. When the last lock * has gone. the FIB is deleted. * * @param fib_index * The index of the FIB * * @paran proto * The protocol of the FIB (and thus the entries therein) * * @param source * The ID of the client/source. */ extern void mfib_table_lock(u32 fib_index, fib_protocol_t proto, mfib_source_t source); /** * @brief * Return the number of entries in the FIB added by a given source. * * @param fib_index * The index of the FIB * * @paran proto * The protocol of the FIB (and thus the entries therein) * * @return number of sourced entries. */ extern u32 mfib_table_get_num_entries(u32 fib_index, fib_protocol_t proto); /** * @brief * Get the less specific (covering) prefix * * @param fib_index * The index of the FIB * * @param prefix * The prefix to lookup * * @return * The index of the less specific fib_entry_t. */ extern fib_node_index_t mfib_table_get_less_specific(u32 fib_index, const mfib_prefix_t *prefix); /** * @brief * Get a pointer to a FIB table */ extern mfib_table_t *mfib_table_get(fib_node_index_t index, fib_protocol_t proto); /** * @brief Call back function when walking entries in a FIB table */ typedef walk_rc_t (*mfib_table_walk_fn_t)(fib_node_index_t fei, void *ctx); /** * @brief Walk all entries in a FIB table * N.B: This is NOT safe to deletes. If you need to delete, walk the whole * table and store elements in a vector, then delete the elements */ extern void mfib_table_walk(u32 fib_index, fib_protocol_t proto, mfib_table_walk_fn_t fn, void *ctx); /** * @brief format (display) the memory usage for mfibs */ extern u8 * format_mfib_table_memory(u8 * s, va_list * args); /** * To assit UT */ extern u32 mfib_table_get_n_routes(fib_node_index_t index, fib_protocol_t proto); #endif