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/*
* Copyright (c) 2021-2023 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 "strategy_dpo_ctx.h"
#include "strategy_dpo_manager.h"
hicn_dpo_ctx_t *hicn_strategy_dpo_ctx_pool;
void
hicn_strategy_init_dpo_ctx_pool ()
{
pool_alloc_aligned (hicn_strategy_dpo_ctx_pool, 256,
2 * CLIB_CACHE_LINE_BYTES);
}
void
hicn_strategy_dpo_ctx_lock (dpo_id_t *dpo)
{
hicn_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (dpo->dpoi_index);
if (PREDICT_TRUE (dpo_ctx != NULL))
{
dpo_ctx->locks++;
HICN_DEBUG ("Locking DPO CTX with index %d. Lock now: %d",
dpo->dpoi_index, dpo_ctx->locks);
}
else
{
HICN_ERROR ("Trying to lock NULL spo_ctx with index %d",
dpo->dpoi_index);
}
}
void
hicn_strategy_dpo_ctx_unlock (dpo_id_t *dpo)
{
hicn_dpo_ctx_t *hicn_strategy_dpo_ctx =
(hicn_dpo_ctx_t *) hicn_strategy_dpo_ctx_get (dpo->dpoi_index);
if (PREDICT_TRUE (hicn_strategy_dpo_ctx != NULL))
{
hicn_strategy_dpo_ctx->locks--;
HICN_DEBUG ("Unlcking DPO CTX with index %d. Lock now: %d",
dpo->dpoi_index, hicn_strategy_dpo_ctx->locks);
if (0 == hicn_strategy_dpo_ctx->locks)
{
HICN_DEBUG ("Releasing DPO CTX %d", dpo->dpoi_index);
pool_put (hicn_strategy_dpo_ctx_pool, hicn_strategy_dpo_ctx);
}
}
else
{
HICN_ERROR ("Trying to unlock NULL spo_ctx with index %d",
dpo->dpoi_index);
}
}
u8 *
hicn_strategy_dpo_format_ctx (u8 *s, va_list *ap)
{
index_t index = va_arg (*ap, index_t);
hicn_dpo_ctx_t *dpo = NULL;
u32 indent = va_arg (*ap, u32);
dpo = (hicn_dpo_ctx_t *) hicn_strategy_dpo_ctx_get (index);
const hicn_dpo_vft_t *dpo_vft = hicn_dpo_get_vft (dpo->dpo_type);
s = dpo_vft->hicn_dpo_format (s, 2, index, indent);
return (s);
}
index_t
hicn_strategy_dpo_ctx_get_index (hicn_dpo_ctx_t *cd)
{
return (cd - hicn_strategy_dpo_ctx_pool);
}
hicn_dpo_ctx_t *
hicn_strategy_dpo_ctx_get (index_t index)
{
hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = NULL;
if (!pool_is_free_index (hicn_strategy_dpo_ctx_pool, index))
{
hicn_strategy_dpo_ctx =
(pool_elt_at_index (hicn_strategy_dpo_ctx_pool, index));
}
return hicn_strategy_dpo_ctx;
}
hicn_dpo_ctx_t *
hicn_strategy_dpo_ctx_alloc ()
{
HICN_DEBUG ("Allocating new DPO CTX");
hicn_dpo_ctx_t *dpo_ctx;
pool_get_aligned (hicn_strategy_dpo_ctx_pool, dpo_ctx,
2 * CLIB_CACHE_LINE_BYTES);
dpo_ctx->locks = 0;
return dpo_ctx;
}
int
hicn_strategy_dpo_ctx_add_nh (hicn_face_id_t nh, hicn_dpo_ctx_t *dpo_ctx,
u8 *pos)
{
int empty = dpo_ctx->entry_count;
/* Iterate through the list of faces to find if the face is already a next
* hop */
for (int i = 0; i < dpo_ctx->entry_count; i++)
{
if (nh == dpo_ctx->next_hops[i])
{
/* If face is marked as deleted, ignore it */
hicn_face_t *face = hicn_dpoi_get_from_idx (dpo_ctx->next_hops[i]);
if (face->flags & HICN_FACE_FLAGS_DELETED)
{
continue;
}
return HICN_ERROR_DPO_CTX_NHOPS_EXISTS;
}
}
/* Get an empty place */
if (empty > HICN_PARAM_FIB_ENTRY_NHOPS_MAX)
{
return HICN_ERROR_DPO_CTX_NHOPS_NS;
}
dpo_ctx->next_hops[empty] = nh;
hicn_face_lock_with_id (nh);
dpo_ctx->entry_count++;
*pos = empty;
return HICN_ERROR_NONE;
}
int
hicn_strategy_dpo_ctx_del_nh (hicn_face_id_t face_id, hicn_dpo_ctx_t *dpo_ctx)
{
int ret = HICN_ERROR_DPO_CTX_NOT_FOUND;
hicn_face_id_t invalid = NEXT_HOP_INVALID;
for (int i = 0; i < dpo_ctx->entry_count; i++)
{
if (dpo_ctx->next_hops[i] == face_id)
{
hicn_face_unlock_with_id (dpo_ctx->next_hops[i]);
dpo_ctx->entry_count--;
dpo_ctx->next_hops[i] = dpo_ctx->next_hops[dpo_ctx->entry_count];
dpo_ctx->next_hops[dpo_ctx->entry_count] = invalid;
ret = HICN_ERROR_NONE;
break;
}
}
return ret;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables: eval: (c-set-style "gnu") End:
*/
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