mirror of
https://github.com/openvswitch/ovs
synced 2025-08-22 18:07:40 +00:00
bfc96d9b50
Some of the uses for the formerly supported regular expression constraints were simply to limit values to those in a set of allowed values. This commit adds support for that kind of simple enumeration constraint.
672 lines
19 KiB
C
672 lines
19 KiB
C
/* Copyright (c) 2009, 2010 Nicira Networks
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "ovsdb-types.h"
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#include <float.h>
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#include <limits.h>
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#include "dynamic-string.h"
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#include "json.h"
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#include "ovsdb-data.h"
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#include "ovsdb-error.h"
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#include "ovsdb-parser.h"
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const struct ovsdb_type ovsdb_type_integer =
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OVSDB_TYPE_SCALAR_INITIALIZER(OVSDB_BASE_INTEGER_INIT);
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const struct ovsdb_type ovsdb_type_real =
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OVSDB_TYPE_SCALAR_INITIALIZER(OVSDB_BASE_REAL_INIT);
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const struct ovsdb_type ovsdb_type_boolean =
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OVSDB_TYPE_SCALAR_INITIALIZER(OVSDB_BASE_BOOLEAN_INIT);
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const struct ovsdb_type ovsdb_type_string =
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OVSDB_TYPE_SCALAR_INITIALIZER(OVSDB_BASE_STRING_INIT);
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const struct ovsdb_type ovsdb_type_uuid =
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OVSDB_TYPE_SCALAR_INITIALIZER(OVSDB_BASE_UUID_INIT);
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/* ovsdb_atomic_type */
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const char *
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ovsdb_atomic_type_to_string(enum ovsdb_atomic_type type)
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{
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switch (type) {
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case OVSDB_TYPE_VOID:
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return "void";
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case OVSDB_TYPE_INTEGER:
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return "integer";
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case OVSDB_TYPE_REAL:
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return "real";
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case OVSDB_TYPE_BOOLEAN:
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return "boolean";
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case OVSDB_TYPE_STRING:
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return "string";
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case OVSDB_TYPE_UUID:
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return "uuid";
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case OVSDB_N_TYPES:
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default:
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return "<invalid>";
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}
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}
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struct json *
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ovsdb_atomic_type_to_json(enum ovsdb_atomic_type type)
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{
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return json_string_create(ovsdb_atomic_type_to_string(type));
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}
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bool
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ovsdb_atomic_type_from_string(const char *string, enum ovsdb_atomic_type *type)
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{
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if (!strcmp(string, "integer")) {
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*type = OVSDB_TYPE_INTEGER;
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} else if (!strcmp(string, "real")) {
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*type = OVSDB_TYPE_REAL;
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} else if (!strcmp(string, "boolean")) {
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*type = OVSDB_TYPE_BOOLEAN;
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} else if (!strcmp(string, "string")) {
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*type = OVSDB_TYPE_STRING;
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} else if (!strcmp(string, "uuid")) {
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*type = OVSDB_TYPE_UUID;
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} else {
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return false;
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}
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return true;
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}
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struct ovsdb_error *
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ovsdb_atomic_type_from_json(enum ovsdb_atomic_type *type,
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const struct json *json)
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{
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if (json->type == JSON_STRING) {
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if (ovsdb_atomic_type_from_string(json_string(json), type)) {
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return NULL;
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} else {
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*type = OVSDB_TYPE_VOID;
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return ovsdb_syntax_error(json, NULL,
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"\"%s\" is not an atomic-type",
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json_string(json));
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}
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} else {
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*type = OVSDB_TYPE_VOID;
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return ovsdb_syntax_error(json, NULL, "atomic-type expected");
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}
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}
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/* ovsdb_base_type */
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void
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ovsdb_base_type_init(struct ovsdb_base_type *base, enum ovsdb_atomic_type type)
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{
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base->type = type;
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base->enum_ = NULL;
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switch (base->type) {
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case OVSDB_TYPE_VOID:
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break;
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case OVSDB_TYPE_INTEGER:
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base->u.integer.min = INT64_MIN;
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base->u.integer.max = INT64_MAX;
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break;
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case OVSDB_TYPE_REAL:
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base->u.real.min = -DBL_MAX;
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base->u.real.max = DBL_MAX;
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break;
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case OVSDB_TYPE_BOOLEAN:
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break;
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case OVSDB_TYPE_STRING:
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base->u.string.minLen = 0;
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base->u.string.maxLen = UINT_MAX;
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break;
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case OVSDB_TYPE_UUID:
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base->u.uuid.refTableName = NULL;
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base->u.uuid.refTable = NULL;
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break;
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case OVSDB_N_TYPES:
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NOT_REACHED();
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default:
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NOT_REACHED();
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}
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}
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/* Returns the type of the 'enum_' member for an ovsdb_base_type whose 'type'
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* is 'atomic_type'. */
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const struct ovsdb_type *
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ovsdb_base_type_get_enum_type(enum ovsdb_atomic_type atomic_type)
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{
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static struct ovsdb_type *types[OVSDB_N_TYPES];
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if (!types[atomic_type]) {
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struct ovsdb_type *type;
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types[atomic_type] = type = xmalloc(sizeof *type);
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ovsdb_base_type_init(&type->key, atomic_type);
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ovsdb_base_type_init(&type->value, OVSDB_TYPE_VOID);
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type->n_min = 1;
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type->n_max = UINT_MAX;
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}
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return types[atomic_type];
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}
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void
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ovsdb_base_type_clone(struct ovsdb_base_type *dst,
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const struct ovsdb_base_type *src)
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{
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*dst = *src;
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if (src->enum_) {
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dst->enum_ = xmalloc(sizeof *dst->enum_);
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ovsdb_datum_clone(dst->enum_, src->enum_,
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ovsdb_base_type_get_enum_type(dst->type));
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}
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switch (dst->type) {
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case OVSDB_TYPE_VOID:
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case OVSDB_TYPE_INTEGER:
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case OVSDB_TYPE_REAL:
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case OVSDB_TYPE_BOOLEAN:
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break;
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case OVSDB_TYPE_STRING:
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break;
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case OVSDB_TYPE_UUID:
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if (dst->u.uuid.refTableName) {
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dst->u.uuid.refTableName = xstrdup(dst->u.uuid.refTableName);
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}
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break;
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case OVSDB_N_TYPES:
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default:
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NOT_REACHED();
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}
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}
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void
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ovsdb_base_type_destroy(struct ovsdb_base_type *base)
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{
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if (base) {
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if (base->enum_) {
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ovsdb_datum_destroy(base->enum_,
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ovsdb_base_type_get_enum_type(base->type));
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free(base->enum_);
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}
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switch (base->type) {
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case OVSDB_TYPE_VOID:
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case OVSDB_TYPE_INTEGER:
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case OVSDB_TYPE_REAL:
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case OVSDB_TYPE_BOOLEAN:
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break;
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case OVSDB_TYPE_STRING:
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break;
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case OVSDB_TYPE_UUID:
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free(base->u.uuid.refTableName);
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break;
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case OVSDB_N_TYPES:
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NOT_REACHED();
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default:
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NOT_REACHED();
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}
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}
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}
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bool
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ovsdb_base_type_is_valid(const struct ovsdb_base_type *base)
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{
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switch (base->type) {
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case OVSDB_TYPE_VOID:
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return true;
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case OVSDB_TYPE_INTEGER:
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return base->u.integer.min <= base->u.integer.max;
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case OVSDB_TYPE_REAL:
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return base->u.real.min <= base->u.real.max;
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case OVSDB_TYPE_BOOLEAN:
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return true;
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case OVSDB_TYPE_STRING:
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return base->u.string.minLen <= base->u.string.maxLen;
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case OVSDB_TYPE_UUID:
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return true;
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case OVSDB_N_TYPES:
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default:
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return false;
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}
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}
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bool
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ovsdb_base_type_has_constraints(const struct ovsdb_base_type *base)
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{
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if (base->enum_) {
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return true;
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}
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switch (base->type) {
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case OVSDB_TYPE_VOID:
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NOT_REACHED();
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case OVSDB_TYPE_INTEGER:
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return (base->u.integer.min != INT64_MIN
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|| base->u.integer.max != INT64_MAX);
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case OVSDB_TYPE_REAL:
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return (base->u.real.min != -DBL_MAX
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|| base->u.real.max != DBL_MAX);
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case OVSDB_TYPE_BOOLEAN:
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return false;
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case OVSDB_TYPE_STRING:
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return base->u.string.minLen != 0 || base->u.string.maxLen != UINT_MAX;
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case OVSDB_TYPE_UUID:
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return base->u.uuid.refTableName != NULL;
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case OVSDB_N_TYPES:
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NOT_REACHED();
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default:
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NOT_REACHED();
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}
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}
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void
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ovsdb_base_type_clear_constraints(struct ovsdb_base_type *base)
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{
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enum ovsdb_atomic_type type = base->type;
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ovsdb_base_type_destroy(base);
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ovsdb_base_type_init(base, type);
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}
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static struct ovsdb_error *
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parse_optional_uint(struct ovsdb_parser *parser, const char *member,
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unsigned int *uint)
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{
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const struct json *json;
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json = ovsdb_parser_member(parser, member, OP_INTEGER | OP_OPTIONAL);
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if (json) {
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if (json->u.integer < 0 || json->u.integer > UINT_MAX) {
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return ovsdb_syntax_error(json, NULL,
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"%s out of valid range 0 to %u",
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member, UINT_MAX);
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}
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*uint = json->u.integer;
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}
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return NULL;
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}
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struct ovsdb_error *
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ovsdb_base_type_from_json(struct ovsdb_base_type *base,
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const struct json *json)
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{
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struct ovsdb_parser parser;
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struct ovsdb_error *error;
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const struct json *type, *enum_;
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if (json->type == JSON_STRING) {
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error = ovsdb_atomic_type_from_json(&base->type, json);
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if (error) {
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return error;
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}
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ovsdb_base_type_init(base, base->type);
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return NULL;
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}
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ovsdb_parser_init(&parser, json, "ovsdb type");
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type = ovsdb_parser_member(&parser, "type", OP_STRING);
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if (ovsdb_parser_has_error(&parser)) {
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base->type = OVSDB_TYPE_VOID;
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return ovsdb_parser_finish(&parser);
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}
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error = ovsdb_atomic_type_from_json(&base->type, type);
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if (error) {
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return error;
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}
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ovsdb_base_type_init(base, base->type);
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enum_ = ovsdb_parser_member(&parser, "enum", OP_ANY | OP_OPTIONAL);
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if (enum_) {
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base->enum_ = xmalloc(sizeof *base->enum_);
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error = ovsdb_datum_from_json(
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base->enum_, ovsdb_base_type_get_enum_type(base->type),
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enum_, NULL);
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if (error) {
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free(base->enum_);
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base->enum_ = NULL;
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}
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} else if (base->type == OVSDB_TYPE_INTEGER) {
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const struct json *min, *max;
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min = ovsdb_parser_member(&parser, "minInteger",
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OP_INTEGER | OP_OPTIONAL);
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max = ovsdb_parser_member(&parser, "maxInteger",
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OP_INTEGER | OP_OPTIONAL);
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base->u.integer.min = min ? min->u.integer : INT64_MIN;
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base->u.integer.max = max ? max->u.integer : INT64_MAX;
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if (base->u.integer.min > base->u.integer.max) {
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error = ovsdb_syntax_error(json, NULL,
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"minInteger exceeds maxInteger");
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}
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} else if (base->type == OVSDB_TYPE_REAL) {
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const struct json *min, *max;
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min = ovsdb_parser_member(&parser, "minReal", OP_NUMBER | OP_OPTIONAL);
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max = ovsdb_parser_member(&parser, "maxReal", OP_NUMBER | OP_OPTIONAL);
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base->u.real.min = min ? json_real(min) : -DBL_MAX;
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base->u.real.max = max ? json_real(max) : DBL_MAX;
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if (base->u.real.min > base->u.real.max) {
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error = ovsdb_syntax_error(json, NULL, "minReal exceeds maxReal");
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}
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} else if (base->type == OVSDB_TYPE_STRING) {
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if (!error) {
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error = parse_optional_uint(&parser, "minLength",
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&base->u.string.minLen);
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}
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if (!error) {
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error = parse_optional_uint(&parser, "maxLength",
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&base->u.string.maxLen);
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}
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if (!error && base->u.string.minLen > base->u.string.maxLen) {
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error = ovsdb_syntax_error(json, NULL,
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"minLength exceeds maxLength");
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}
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} else if (base->type == OVSDB_TYPE_UUID) {
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const struct json *refTable;
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refTable = ovsdb_parser_member(&parser, "refTable",
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OP_ID | OP_OPTIONAL);
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if (refTable) {
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base->u.uuid.refTableName = xstrdup(refTable->u.string);
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/* We can't set base->u.uuid.refTable here because we don't have
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* enough context (we might not even be running in ovsdb-server).
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* ovsdb_create() will set refTable later. */
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}
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}
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if (error) {
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ovsdb_error_destroy(ovsdb_parser_finish(&parser));
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} else {
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error = ovsdb_parser_finish(&parser);
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}
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if (error) {
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ovsdb_base_type_destroy(base);
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base->type = OVSDB_TYPE_VOID;
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}
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return error;
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}
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struct json *
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ovsdb_base_type_to_json(const struct ovsdb_base_type *base)
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{
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struct json *json;
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if (!ovsdb_base_type_has_constraints(base)) {
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return json_string_create(ovsdb_atomic_type_to_string(base->type));
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}
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json = json_object_create();
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json_object_put_string(json, "type",
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ovsdb_atomic_type_to_string(base->type));
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if (base->enum_) {
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const struct ovsdb_type *type;
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type = ovsdb_base_type_get_enum_type(base->type);
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json_object_put(json, "enum", ovsdb_datum_to_json(base->enum_, type));
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}
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switch (base->type) {
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case OVSDB_TYPE_VOID:
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NOT_REACHED();
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case OVSDB_TYPE_INTEGER:
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if (base->u.integer.min != INT64_MIN) {
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json_object_put(json, "minInteger",
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json_integer_create(base->u.integer.min));
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}
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if (base->u.integer.max != INT64_MAX) {
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json_object_put(json, "maxInteger",
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json_integer_create(base->u.integer.max));
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}
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break;
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case OVSDB_TYPE_REAL:
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if (base->u.real.min != -DBL_MAX) {
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json_object_put(json, "minReal",
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json_real_create(base->u.real.min));
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}
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if (base->u.real.max != DBL_MAX) {
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json_object_put(json, "maxReal",
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json_real_create(base->u.real.max));
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}
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break;
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case OVSDB_TYPE_BOOLEAN:
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break;
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case OVSDB_TYPE_STRING:
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if (base->u.string.minLen != 0) {
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json_object_put(json, "minLength",
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json_integer_create(base->u.string.minLen));
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}
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if (base->u.string.maxLen != UINT_MAX) {
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json_object_put(json, "maxLength",
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json_integer_create(base->u.string.maxLen));
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}
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break;
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case OVSDB_TYPE_UUID:
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if (base->u.uuid.refTableName) {
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json_object_put_string(json, "refTable",
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base->u.uuid.refTableName);
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}
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break;
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case OVSDB_N_TYPES:
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NOT_REACHED();
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default:
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NOT_REACHED();
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}
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return json;
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}
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/* ovsdb_type */
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void
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ovsdb_type_clone(struct ovsdb_type *dst, const struct ovsdb_type *src)
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{
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ovsdb_base_type_clone(&dst->key, &src->key);
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ovsdb_base_type_clone(&dst->value, &src->value);
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dst->n_min = src->n_min;
|
||
dst->n_max = src->n_max;
|
||
}
|
||
|
||
void
|
||
ovsdb_type_destroy(struct ovsdb_type *type)
|
||
{
|
||
ovsdb_base_type_destroy(&type->key);
|
||
ovsdb_base_type_destroy(&type->value);
|
||
}
|
||
|
||
bool
|
||
ovsdb_type_is_valid(const struct ovsdb_type *type)
|
||
{
|
||
return (type->key.type != OVSDB_TYPE_VOID
|
||
&& ovsdb_base_type_is_valid(&type->key)
|
||
&& ovsdb_base_type_is_valid(&type->value)
|
||
&& type->n_min <= 1
|
||
&& type->n_min <= type->n_max
|
||
&& type->n_max >= 1);
|
||
}
|
||
|
||
static struct ovsdb_error *
|
||
n_from_json(const struct json *json, unsigned int *n)
|
||
{
|
||
if (!json) {
|
||
return NULL;
|
||
} else if (json->type == JSON_INTEGER
|
||
&& json->u.integer >= 0 && json->u.integer < UINT_MAX) {
|
||
*n = json->u.integer;
|
||
return NULL;
|
||
} else {
|
||
return ovsdb_syntax_error(json, NULL, "bad min or max value");
|
||
}
|
||
}
|
||
|
||
char *
|
||
ovsdb_type_to_english(const struct ovsdb_type *type)
|
||
{
|
||
const char *key = ovsdb_atomic_type_to_string(type->key.type);
|
||
const char *value = ovsdb_atomic_type_to_string(type->value.type);
|
||
if (ovsdb_type_is_scalar(type)) {
|
||
return xstrdup(key);
|
||
} else {
|
||
struct ds s = DS_EMPTY_INITIALIZER;
|
||
ds_put_cstr(&s, ovsdb_type_is_set(type) ? "set" : "map");
|
||
if (type->n_max == UINT_MAX) {
|
||
if (type->n_min) {
|
||
ds_put_format(&s, " of %u or more", type->n_min);
|
||
} else {
|
||
ds_put_cstr(&s, " of");
|
||
}
|
||
} else if (type->n_min) {
|
||
ds_put_format(&s, " of %u to %u", type->n_min, type->n_max);
|
||
} else {
|
||
ds_put_format(&s, " of up to %u", type->n_max);
|
||
}
|
||
if (ovsdb_type_is_set(type)) {
|
||
ds_put_format(&s, " %ss", key);
|
||
} else {
|
||
ds_put_format(&s, " (%s, %s) pairs", key, value);
|
||
}
|
||
return ds_cstr(&s);
|
||
}
|
||
}
|
||
|
||
struct ovsdb_error *
|
||
ovsdb_type_from_json(struct ovsdb_type *type, const struct json *json)
|
||
{
|
||
ovsdb_base_type_init(&type->value, OVSDB_TYPE_VOID);
|
||
type->n_min = 1;
|
||
type->n_max = 1;
|
||
|
||
if (json->type == JSON_STRING) {
|
||
return ovsdb_base_type_from_json(&type->key, json);
|
||
} else if (json->type == JSON_OBJECT) {
|
||
const struct json *key, *value, *min, *max;
|
||
struct ovsdb_error *error;
|
||
struct ovsdb_parser parser;
|
||
|
||
ovsdb_parser_init(&parser, json, "ovsdb type");
|
||
key = ovsdb_parser_member(&parser, "key", OP_STRING | OP_OBJECT);
|
||
value = ovsdb_parser_member(&parser, "value",
|
||
OP_STRING | OP_OBJECT | OP_OPTIONAL);
|
||
min = ovsdb_parser_member(&parser, "min", OP_INTEGER | OP_OPTIONAL);
|
||
max = ovsdb_parser_member(&parser, "max",
|
||
OP_INTEGER | OP_STRING | OP_OPTIONAL);
|
||
error = ovsdb_parser_finish(&parser);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
|
||
error = ovsdb_base_type_from_json(&type->key, key);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
|
||
if (value) {
|
||
error = ovsdb_base_type_from_json(&type->value, value);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
}
|
||
|
||
error = n_from_json(min, &type->n_min);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
|
||
if (max && max->type == JSON_STRING
|
||
&& !strcmp(max->u.string, "unlimited")) {
|
||
type->n_max = UINT_MAX;
|
||
} else {
|
||
error = n_from_json(max, &type->n_max);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
}
|
||
|
||
if (!ovsdb_type_is_valid(type)) {
|
||
return ovsdb_syntax_error(json, NULL,
|
||
"ovsdb type fails constraint checks");
|
||
}
|
||
|
||
return NULL;
|
||
} else {
|
||
return ovsdb_syntax_error(json, NULL, "ovsdb type expected");
|
||
}
|
||
}
|
||
|
||
struct json *
|
||
ovsdb_type_to_json(const struct ovsdb_type *type)
|
||
{
|
||
if (ovsdb_type_is_scalar(type)
|
||
&& !ovsdb_base_type_has_constraints(&type->key)) {
|
||
return ovsdb_base_type_to_json(&type->key);
|
||
} else {
|
||
struct json *json = json_object_create();
|
||
json_object_put(json, "key", ovsdb_base_type_to_json(&type->key));
|
||
if (type->value.type != OVSDB_TYPE_VOID) {
|
||
json_object_put(json, "value",
|
||
ovsdb_base_type_to_json(&type->value));
|
||
}
|
||
if (type->n_min != 1) {
|
||
json_object_put(json, "min", json_integer_create(type->n_min));
|
||
}
|
||
if (type->n_max == UINT_MAX) {
|
||
json_object_put_string(json, "max", "unlimited");
|
||
} else if (type->n_max != 1) {
|
||
json_object_put(json, "max", json_integer_create(type->n_max));
|
||
}
|
||
return json;
|
||
}
|
||
}
|