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/*
* Copyright (c) 2018 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/mfib/mfib_entry_src.h>
#include <vnet/mfib/mfib_entry_cover.h>
#include <vnet/mfib/mfib_table.h>
#include <vnet/fib/fib_path_list.h>
static void
mfib_entry_src_rr_deactiviate (mfib_entry_t *mfib_entry,
mfib_entry_src_t *msrc)
{
mfib_entry_t *cover;
/*
* remove the depednecy on the covering entry
*/
if (FIB_NODE_INDEX_INVALID != msrc->mfes_cover)
{
cover = mfib_entry_get(msrc->mfes_cover);
mfib_entry_cover_untrack(cover, msrc->mfes_sibling);
msrc->mfes_cover = FIB_NODE_INDEX_INVALID;
}
fib_path_list_unlock(msrc->mfes_pl);
msrc->mfes_pl = FIB_NODE_INDEX_INVALID;
msrc->mfes_itfs = NULL;
msrc->mfes_exts = NULL;
}
static void
mfib_entry_src_rr_activiate (mfib_entry_t *mfib_entry,
mfib_entry_src_t *msrc)
{
mfib_entry_src_t *csrc;
mfib_entry_t *cover;
msrc->mfes_cover = mfib_table_get_less_specific(mfib_entry->mfe_fib_index,
&mfib_entry->mfe_prefix);
ASSERT(FIB_NODE_INDEX_INVALID != msrc->mfes_cover);
cover = mfib_entry_get(msrc->mfes_cover);
msrc->mfes_sibling =
mfib_entry_cover_track(cover, mfib_entry_get_index(mfib_entry));
csrc = mfib_entry_get_best_src(cover);
msrc->mfes_pl = csrc->mfes_pl;
fib_path_list_lock(msrc->mfes_pl);
msrc->mfes_route_flags = csrc->mfes_route_flags;
msrc->mfes_itfs = csrc->mfes_itfs;
msrc->mfes_exts = csrc->mfes_exts;
msrc->mfes_rpf_id = csrc->mfes_rpf_id;
}
static mfib_src_res_t
mfib_entry_src_rr_cover_change (mfib_entry_t *mfib_entry,
mfib_entry_src_t *msrc)
{
mfib_entry_src_rr_deactiviate(mfib_entry, msrc);
mfib_entry_src_rr_activiate(mfib_entry, msrc);
return (MFIB_SRC_REEVALUATE);
}
static mfib_src_res_t
mfib_entry_src_rr_cover_update (mfib_entry_t *mfib_entry,
mfib_entry_src_t *msrc)
{
/*
* path lists are updated (i.e. not shared) in the mfib world,
* so there's no need to check for a new one. but we do need to
* copy down any new flags and input interfaces
*/
mfib_entry_t *cover;
cover = mfib_entry_get(msrc->mfes_cover);
msrc->mfes_route_flags = cover->mfe_flags;
msrc->mfes_itfs = cover->mfe_itfs;
msrc->mfes_rpf_id = cover->mfe_rpf_id;
return (MFIB_SRC_REEVALUATE);
}
void
mfib_entry_src_rr_module_init (void)
{
mfib_entry_src_vft mvft = {
.mev_activate = mfib_entry_src_rr_activiate,
.mev_deactivate = mfib_entry_src_rr_deactiviate,
.mev_cover_change = mfib_entry_src_rr_cover_change,
.mev_cover_update = mfib_entry_src_rr_cover_update,
};
mfib_entry_src_register(MFIB_SOURCE_RR, &mvft);
}
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