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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 "fib_entry.h"
#include "fib_entry_src.h"
#include "fib_path_list.h"
#include "fib_internal.h"
#include "fib_table.h"
#include "fib_entry_cover.h"
#include "fib_attached_export.h"
/**
* Source initialisation Function
*/
static void
fib_entry_src_interface_init (fib_entry_src_t *src)
{
src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
src->u.interface.fesi_sibling = FIB_NODE_INDEX_INVALID;
}
static void
fib_entry_src_interface_add (fib_entry_src_t *src,
const fib_entry_t *entry,
fib_entry_flag_t flags,
dpo_proto_t proto,
const dpo_id_t *dpo)
{
src->fes_pl = fib_path_list_create_special(
proto,
fib_entry_src_flags_2_path_list_flags(flags),
dpo);
}
static void
fib_entry_src_interface_remove (fib_entry_src_t *src)
{
src->fes_pl = FIB_NODE_INDEX_INVALID;
}
static void
fib_entry_src_interface_path_swap (fib_entry_src_t *src,
const fib_entry_t *entry,
fib_path_list_flags_t pl_flags,
const fib_route_path_t *paths)
{
ip_adjacency_t *adj;
src->fes_pl = fib_path_list_create(pl_flags, paths);
/*
* this is a hack to get the entry's prefix into the glean adjacency
* so that it is available for fast retrieval in the switch path.
*/
if (!(FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags))
{
adj = adj_get(fib_path_list_get_adj(
src->fes_pl,
fib_entry_get_default_chain_type(entry)));
if (IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index)
{
/*
* the connected prefix will link to a glean on a non-p2p
* u.interface.
*/
adj->sub_type.glean.receive_addr = entry->fe_prefix.fp_addr;
}
}
}
/*
* Source activate.
* Called when the source is teh new longer best source on the entry
*/
static int
fib_entry_src_interface_activate (fib_entry_src_t *src,
const fib_entry_t *fib_entry)
{
fib_entry_t *cover;
if (FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags)
{
/*
* Track the covering attached/connected cover. This is so that
* during an attached export of the cover, this local prefix is
* also exported
*/
src->u.interface.fesi_cover =
fib_table_get_less_specific(fib_entry->fe_fib_index,
&fib_entry->fe_prefix);
ASSERT(FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover);
cover = fib_entry_get(src->u.interface.fesi_cover);
src->u.interface.fesi_sibling =
fib_entry_cover_track(cover, fib_entry_get_index(fib_entry));
}
return (!0);
}
/*
* Source Deactivate.
* Called when the source is no longer best source on the entry
*/
static void
fib_entry_src_interface_deactivate (fib_entry_src_t *src,
const fib_entry_t *fib_entry)
{
fib_entry_t *cover;
/*
* remove the dependency on the covering entry
*/
if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
{
cover = fib_entry_get(src->u.interface.fesi_cover);
fib_entry_cover_untrack(cover, src->u.interface.fesi_sibling);
src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
}
}
static fib_entry_src_cover_res_t
fib_entry_src_interface_cover_change (fib_entry_src_t *src,
const fib_entry_t *fib_entry)
{
fib_entry_src_cover_res_t res = {
.install = !0,
.bw_reason = FIB_NODE_BW_REASON_FLAG_NONE,
};
if (FIB_NODE_INDEX_INVALID == src->u.interface.fesi_cover)
{
/*
* not tracking the cover. surprised we got poked?
*/
return (res);
}
/*
* this function is called when this entry's cover has a more specific
* entry inserted benaeth it. That does not necessarily mean that this
* entry is covered by the new prefix. check that
*/
if (src->u.interface.fesi_cover !=
fib_table_get_less_specific(fib_entry->fe_fib_index,
&fib_entry->fe_prefix))
{
fib_entry_src_interface_deactivate(src, fib_entry);
fib_entry_src_interface_activate(src, fib_entry);
}
return (res);
}
static void
fib_entry_src_interface_installed (fib_entry_src_t *src,
const fib_entry_t *fib_entry)
{
/*
* The interface source now rules! poke our cover to get exported
*/
fib_entry_t *cover;
if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
{
cover = fib_entry_get(src->u.interface.fesi_cover);
fib_attached_export_covered_added(cover,
fib_entry_get_index(fib_entry));
}
}
static u8*
fib_entry_src_interface_format (fib_entry_src_t *src,
u8* s)
{
return (format(s, " cover:%d", src->u.interface.fesi_cover));
}
const static fib_entry_src_vft_t interface_src_vft = {
.fesv_init = fib_entry_src_interface_init,
.fesv_add = fib_entry_src_interface_add,
.fesv_remove = fib_entry_src_interface_remove,
.fesv_path_swap = fib_entry_src_interface_path_swap,
.fesv_activate = fib_entry_src_interface_activate,
.fesv_deactivate = fib_entry_src_interface_deactivate,
.fesv_format = fib_entry_src_interface_format,
.fesv_installed = fib_entry_src_interface_installed,
.fesv_cover_change = fib_entry_src_interface_cover_change,
/*
* not concerned about updates to the cover. the cover will
* decide to export or not
*/
};
void
fib_entry_src_interface_register (void)
{
fib_entry_src_behaviour_register(FIB_SOURCE_BH_INTERFACE,
&interface_src_vft);
}
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