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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.
*/
/**
* @brief
*
*/
#ifndef __REPLICATE_DPO_H__
#define __REPLICATE_DPO_H__
#include <vlib/vlib.h>
#include <vnet/ip/lookup.h>
#include <vnet/dpo/dpo.h>
#include <vnet/dpo/load_balance.h>
#include <vnet/fib/fib_types.h>
#include <vnet/mpls/mpls_types.h>
/**
* replicate main
*/
typedef struct replicate_main_t_
{
vlib_combined_counter_main_t repm_counters;
/* per-cpu vector of cloned packets */
u32 **clones;
} replicate_main_t;
extern replicate_main_t replicate_main;
/**
* The number of buckets that a load-balance object can have and still
* fit in one cache-line
*/
#define REP_NUM_INLINE_BUCKETS 4
/**
* Flags on the replicate DPO
*/
typedef enum replicate_flags_t_
{
REPLICATE_FLAGS_NONE,
REPLICATE_FLAGS_HAS_LOCAL,
} __clib_packed replicate_flags_t;
/**
* The FIB DPO provieds;
* - load-balancing over the next DPOs in the chain/graph
* - per-route counters
*/
typedef struct replicate_t_ {
/**
* required for pool_get_aligned.
* memebers used in the switch path come first!
*/
CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
/**
* number of buckets in the replicate.
*/
u16 rep_n_buckets;
/**
* The protocol of packets that traverse this REP.
* need in combination with the flow hash config to determine how to hash.
* u8.
*/
dpo_proto_t rep_proto;
/**
* Flags specifying the replicate properties/behaviour
*/
replicate_flags_t rep_flags;
/**
* The number of locks, which is approximately the number of users,
* of this load-balance.
* Load-balance objects of via-entries are heavily shared by recursives,
* so the lock count is a u32.
*/
u32 rep_locks;
/**
* Vector of buckets containing the next DPOs, sized as repo_num
*/
dpo_id_t *rep_buckets;
/**
* The rest of the cache line is used for buckets. In the common case
* where there there are less than 4 buckets, then the buckets are
* on the same cachlie and we save ourselves a pointer dereferance in
* the data-path.
*/
dpo_id_t rep_buckets_inline[REP_NUM_INLINE_BUCKETS];
} replicate_t;
STATIC_ASSERT(sizeof(replicate_t) <= CLIB_CACHE_LINE_BYTES,
"A replicate object size exceeds one cacheline");
/**
* Flags controlling load-balance formatting/display
*/
typedef enum replicate_format_flags_t_ {
REPLICATE_FORMAT_NONE,
REPLICATE_FORMAT_DETAIL = (1 << 0),
} replicate_format_flags_t;
extern index_t replicate_create(u32 num_buckets,
dpo_proto_t rep_proto);
extern void replicate_multipath_update(
const dpo_id_t *dpo,
load_balance_path_t *next_hops);
extern void replicate_set_bucket(index_t repi,
u32 bucket,
const dpo_id_t *next);
extern u8* format_replicate(u8 * s, va_list * args);
extern const dpo_id_t *replicate_get_bucket(index_t repi,
u32 bucket);
extern int replicate_is_drop(const dpo_id_t *dpo);
extern u16 replicate_n_buckets(index_t repi);
extern index_t replicate_dup(replicate_flags_t flags,
index_t repi);
/**
* The encapsulation breakages are for fast DP access
*/
extern replicate_t *replicate_pool;
static inline replicate_t*
replicate_get (index_t repi)
{
repi &= ~MPLS_IS_REPLICATE;
return (pool_elt_at_index(replicate_pool, repi));
}
#define REP_HAS_INLINE_BUCKETS(_rep) \
((_rep)->rep_n_buckets <= REP_NUM_INLINE_BUCKETS)
static inline const dpo_id_t *
replicate_get_bucket_i (const replicate_t *rep,
u32 bucket)
{
ASSERT(bucket < rep->rep_n_buckets);
if (PREDICT_TRUE(REP_HAS_INLINE_BUCKETS(rep)))
{
return (&rep->rep_buckets_inline[bucket]);
}
else
{
return (&rep->rep_buckets[bucket]);
}
}
extern void replicate_module_init(void);
#endif
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