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/*
* Copyright (c) 2015, 2016 Nicira, Inc.
* Copyright (c) 2021, Red Hat, Inc.
*
* 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 LFLOW_CACHE_H
#define LFLOW_CACHE_H 1
#include "openvswitch/dynamic-string.h"
#include "openvswitch/hmap.h"
#include "openvswitch/uuid.h"
#include "simap.h"
struct lflow_cache;
/* Various lflow cache types which
* - store the conjunction id offset if the lflow matches
* results in conjunctive OpenvSwitch flows.
*
* - Caches
* (1) expr tree if the logical flow doesn't have port group/address set
* references but has other references (such as lport).
* (2) expr matches if the logical flow doesn't have any references.
*/
enum lflow_cache_type {
LCACHE_T_EXPR, /* Expr tree of the logical flow is cached. */
LCACHE_T_MATCHES, /* Expression matches are cached. */
LCACHE_T_MAX,
LCACHE_T_NONE = LCACHE_T_MAX, /* Not found in cache. */
};
struct lflow_cache_value {
enum lflow_cache_type type;
/* n_conjs and conj_id_ofs are used only for LCACHE_T_MATCHES.
* They are saved together with the match, so that we can re-allocate the
* same ids when reusing the cached match for a given lflow. */
uint32_t n_conjs;
uint32_t conj_id_ofs;
union {
struct hmap *expr_matches;
struct expr *expr;
};
};
struct lflow_cache *lflow_cache_create(void);
void lflow_cache_flush(struct lflow_cache *);
void lflow_cache_destroy(struct lflow_cache *);
void lflow_cache_enable(struct lflow_cache *, bool enabled, uint32_t capacity,
uint64_t max_mem_usage_kb, uint32_t lflow_trim_limit,
uint32_t trim_wmark_perc, uint32_t trim_timeout_ms);
bool lflow_cache_is_enabled(const struct lflow_cache *);
void lflow_cache_get_stats(const struct lflow_cache *, struct ds *output);
void lflow_cache_add_expr(struct lflow_cache *, const struct uuid *lflow_uuid,
struct expr *expr, size_t expr_sz);
void lflow_cache_add_matches(struct lflow_cache *,
const struct uuid *lflow_uuid,
uint32_t conj_id_ofs, uint32_t n_conjs,
struct hmap *matches, size_t matches_sz);
struct lflow_cache_value *lflow_cache_get(struct lflow_cache *,
const struct uuid *lflow_uuid);
void lflow_cache_delete(struct lflow_cache *, const struct uuid *lflow_uuid);
void lflow_cache_get_memory_usage(const struct lflow_cache *,
struct simap *usage);
void lflow_cache_run(struct lflow_cache *);
void lflow_cache_wait(struct lflow_cache *);
#endif /* controller/lflow-cache.h */
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