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ovsdb-cs: New module that factors out code from ovsdb-idl.

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This new module has a single direct user now.  In the future, it
will also be used by OVN.

Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
Ben Pfaff
2020-12-01 18:15:11 -08:00
parent 81f06e2b8f
commit a5c067a8b9
4 changed files with 471 additions and 369 deletions
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70
lib/ovsdb-cs.h Normal file
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/* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 Nicira, Inc.
* Copyright (C) 2016 Hewlett Packard Enterprise Development LP
*
* 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 OVSDB_CS_H
#define OVSDB_CS_H 1
#include "openvswitch/compiler.h"
#include "openvswitch/hmap.h"
#include "openvswitch/json.h"
#include "openvswitch/shash.h"
#include "openvswitch/uuid.h"
/* Open vSwitch Database client synchronization layer. */
/* Helper for partially parsing the <table-updates> or <table-updates2> that
* appear in struct ovsdb_cs_update_event. The helper leaves the data in JSON
* format, so it doesn't need to know column types. */
/* The kind of change to a row. */
enum ovsdb_cs_row_update_type {
OVSDB_CS_ROW_DELETE, /* Row deletion. */
OVSDB_CS_ROW_INSERT, /* Row insertion. */
OVSDB_CS_ROW_UPDATE, /* Replacement of data within a row. */
OVSDB_CS_ROW_XOR /* <table-updates2> diff application. */
};
/* Partially parsed <row-update> or <row-update2>. */
struct ovsdb_cs_row_update {
struct uuid row_uuid; /* Row's _uuid. */
enum ovsdb_cs_row_update_type type; /* Type of change. */
const struct shash *columns; /* Map from column name to json data. */
};
/* Partially parsed <table-update> or <table-update2>. */
struct ovsdb_cs_table_update {
const char *table_name;
struct ovsdb_cs_row_update *row_updates;
size_t n;
};
struct ovsdb_cs_db_update {
struct ovsdb_cs_table_update *table_updates;
size_t n;
};
struct ovsdb_error *ovsdb_cs_parse_db_update(
const struct json *table_updates, int version,
struct ovsdb_cs_db_update **db_updatep)
OVS_WARN_UNUSED_RESULT;
void ovsdb_cs_db_update_destroy(struct ovsdb_cs_db_update *);
/* Simple parsing of OVSDB schemas for use by ovsdb_cs clients. */
struct shash *ovsdb_cs_parse_schema(const struct json *schema_json);
void ovsdb_cs_free_schema(struct shash *schema);
#endif /* ovsdb-cs.h */