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/*
* 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_entry : The BIER entry
*
* The interface to the BIER entry is through a bier_entry_t* rather
* than an index. This is becuase the BIER table allocates the entries
* in a contiguous array once and only once when the table is created.
* this is done for forwarding performance. The entry is thus not subject
* to realloc, and does not need to be malloc'd when a route to that
* bit-position is first learned.
*
*/
#ifndef __BIER_ENTRY_H__
#define __BIER_ENTRY_H__
#include <vlib/vlib.h>
#include <vnet/fib/fib_node.h>
#include <vnet/bier/bier_types.h>
/**
* Forward declarations
*/
struct bier_route_update_t_;
struct bier_fmask_db_t_;
/**
* The BIER entry
*
* the BIER entry is the representation of a BIER forwarding egress router (BFER)
* (or the egress PE) that is assigned a bit position.
*/
typedef struct bier_entry_t_ {
/**
* linkage into the FIB graph
*/
fib_node_t be_node;
/**
* The index of the BIER table in which this entry resides
*/
index_t be_bti;
/**
* the bit position this entry represents.
* this is the key table insertion
*/
bier_bp_t be_bp;
/**
* the FIB path-list this entry resolves through.
* the path-list is itself resoved on the entry's fmasks
*/
fib_node_index_t be_path_list;
/**
* sibling index on the path list
*/
fib_node_index_t be_sibling_index;
} bier_entry_t;
extern index_t bier_entry_create(index_t bti,
bier_bp_t bp);
extern void bier_entry_delete(index_t bei);
extern void bier_entry_path_add(index_t bei,
const fib_route_path_t *brp);
extern int bier_entry_path_remove(index_t bei,
const fib_route_path_t *brp);
extern u8* format_bier_entry(u8* s, va_list *ap);
extern void bier_entry_contribute_forwarding(index_t bei,
dpo_id_t *dpo);
extern bier_entry_t *bier_entry_pool;
always_inline bier_entry_t* bier_entry_get(index_t bei)
{
return (&bier_entry_pool[bei]);
}
#endif
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