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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.
*/
#include <vnet/adj/adj_delegate.h>
#include <vnet/adj/adj.h>
#include <vnet/adj/adj_internal.h>
/*
* The per-type vector of virtual function tables
*/
static adj_delegate_vft_t *ad_vfts;
static adj_delegate_t *
adj_delegate_find_i (const ip_adjacency_t *adj,
adj_delegate_type_t type,
u32 *index)
{
adj_delegate_t *delegate;
int ii;
ii = 0;
vec_foreach(delegate, adj->ia_delegates)
{
if (delegate->ad_type == type)
{
if (NULL != index)
*index = ii;
return (delegate);
}
else
{
ii++;
}
}
return (NULL);
}
adj_delegate_t *
adj_delegate_get (const ip_adjacency_t *adj,
adj_delegate_type_t type)
{
return (adj_delegate_find_i(adj, type, NULL));
}
void
adj_delegate_remove (ip_adjacency_t *adj,
adj_delegate_type_t type)
{
adj_delegate_t *aed;
u32 index = ~0;
aed = adj_delegate_find_i(adj, type, &index);
ASSERT(NULL != aed);
vec_del1(adj->ia_delegates, index);
}
static int
adj_delegate_cmp_for_sort (void * v1,
void * v2)
{
adj_delegate_t *delegate1 = v1, *delegate2 = v2;
return (delegate1->ad_type - delegate2->ad_type);
}
static void
adj_delegate_init (ip_adjacency_t *adj,
adj_delegate_type_t type)
{
adj_delegate_t delegate = {
.ad_adj_index = adj_get_index(adj),
.ad_type = type,
};
vec_add1(adj->ia_delegates, delegate);
vec_sort_with_function(adj->ia_delegates,
adj_delegate_cmp_for_sort);
}
adj_delegate_t *
adj_delegate_find_or_add (ip_adjacency_t *adj,
adj_delegate_type_t adt)
{
adj_delegate_t *delegate;
delegate = adj_delegate_get(adj, adt);
if (NULL == delegate)
{
adj_delegate_init(adj, adt);
}
return (adj_delegate_get(adj, adt));
}
void adj_delegate_vft_lock_gone (ip_adjacency_t *adj)
{
adj_delegate_t *delegate;
vec_foreach(delegate, adj->ia_delegates) {
if (ad_vfts[delegate->ad_type].adv_last_lock)
ad_vfts[delegate->ad_type].adv_last_lock(adj, delegate);
}
}
u8 *
format_adj_delegate (u8 * s, va_list * args)
{
adj_delegate_t *aed;
aed = va_arg (*args, adj_delegate_t *);
if (ad_vfts[aed->ad_type].adv_format)
return ad_vfts[aed->ad_type].adv_format(aed, s);
return format(s, "unknown delegate");
}
/**
* adj_delegate_register_type
*
* Register the function table for a given type
*/
void
adj_delegate_register_type (adj_delegate_type_t type,
const adj_delegate_vft_t *vft)
{
/*
* assert that one only registration is made per-node type
*/
if (vec_len(ad_vfts) > type)
ASSERT(NULL == ad_vfts[type].adv_last_lock);
/*
* Assert that we are getting each of the required functions
*/
ASSERT(NULL != vft->adv_last_lock);
vec_validate(ad_vfts, type);
ad_vfts[type] = *vft;
}
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