ovn/controller/lflow.h

   1 /* Copyright (c) 2015 Nicira, Inc.
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #ifndef OVN_LFLOW_H
  17 #define OVN_LFLOW_H 1
  18
  19 #include "ovn/lib/logical-fields.h"
  20
  21 /* Logical_Flow table translation to OpenFlow
  22  * ==========================================
  23  *
  24  * The Logical_Flow table obtained from the OVN_Southbound database works in
  25  * terms of logical entities, that is, logical flows among logical datapaths
  26  * and logical ports.  This code translates these logical flows into OpenFlow
  27  * flows that, again, work in terms of logical entities implemented through
  28  * OpenFlow extensions (e.g. registers represent the logical input and output
  29  * ports).
  30  *
  31  * Physical-to-logical and logical-to-physical translation are implemented in
  32  * physical.[ch] as separate OpenFlow tables that run before and after,
  33  * respectively, the logical pipeline OpenFlow tables.
  34  */
  35
  36 #include <stdint.h>
  37
  38 struct controller_ctx;
  39 struct hmap;
  40 struct simap;
  41 struct uuid;
  42
  43 /* OpenFlow table numbers.
  44  *
  45  * These are heavily documented in ovn-architecture(7), please update it if
  46  * you make any changes. */
  47 #define OFTABLE_PHY_TO_LOG            0
  48 #define OFTABLE_LOG_INGRESS_PIPELINE 16 /* First of LOG_PIPELINE_LEN tables. */
  49 #define OFTABLE_REMOTE_OUTPUT        32
  50 #define OFTABLE_LOCAL_OUTPUT         33
  51 #define OFTABLE_DROP_LOOPBACK        34
  52 #define OFTABLE_LOG_EGRESS_PIPELINE  48 /* First of LOG_PIPELINE_LEN tables. */
  53 #define OFTABLE_LOG_TO_PHY           64
  54
  55 /* The number of tables for the ingress and egress pipelines. */
  56 #define LOG_PIPELINE_LEN 16
  57
  58 void lflow_init(void);
  59 void lflow_run(struct controller_ctx *, struct hmap *flow_table,
  60                const struct simap *ct_zones);
  61 void lflow_destroy(void);
  62
  63 #endif /* ovn/lflow.h */