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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.
*/
#ifndef __MPLS_DISP_DPO_H__
#define __MPLS_DISP_DPO_H__
#include <vnet/vnet.h>
#include <vnet/mpls/packet.h>
#include <vnet/dpo/dpo.h>
#include <vnet/mfib/mfib_types.h>
/**
* A representation of an MPLS label for imposition in the data-path
*/
typedef struct mpls_disp_dpo_t
{
/**
* required for pool_get_aligned.
* memebers used in the switch path come first!
*/
CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
/**
* Next DPO in the graph
*/
dpo_id_t mdd_dpo;
/**
* The protocol of the payload/packets that are being encapped
*/
dpo_proto_t mdd_payload_proto;
/**
* RPF-ID (if this is an mcast disposition)
*/
fib_rpf_id_t mdd_rpf_id;
/**
* Number of locks/users of the label
*/
u16 mdd_locks;
/**
* LSP mode
*/
fib_mpls_lsp_mode_t mdd_mode;
} mpls_disp_dpo_t;
/**
* @brief Assert that the MPLS label object is less than a cache line in size.
* Should this get any bigger then we will need to reconsider how many labels
* can be pushed in one object.
*/
_Static_assert((sizeof(mpls_disp_dpo_t) <= CLIB_CACHE_LINE_BYTES),
"MPLS Disposition DPO is larger than one cache line.");
/**
* @brief Create an MPLS label object
*
* @param payload_proto The ptocool of the payload packets that will
* be imposed with this label header.
* @param rpf_id The RPF ID the packet will aquire - only for mcast
* @param mode The LSP mode; pipe or uniform
* @param dpo The parent of the created MPLS label object
*/
extern void mpls_disp_dpo_create(dpo_proto_t payload_proto,
fib_rpf_id_t rpf_id,
fib_mpls_lsp_mode_t mode,
const dpo_id_t *parent,
dpo_id_t *dpo);
extern u8* format_mpls_disp_dpo(u8 *s, va_list *args);
/*
* Encapsulation violation for fast data-path access
*/
extern mpls_disp_dpo_t *mpls_disp_dpo_pool;
static inline mpls_disp_dpo_t *
mpls_disp_dpo_get (index_t index)
{
return (pool_elt_at_index(mpls_disp_dpo_pool, index));
}
extern void mpls_disp_dpo_module_init(void);
#endif
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