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");
    }
}
Exemplo n.º 2
0
struct json *
ovsdb_execute(struct ovsdb *db, const struct ovsdb_session *session,
              const struct json *params,
              long long int elapsed_msec, long long int *timeout_msec)
{
    struct ovsdb_execution x;
    struct ovsdb_error *error;
    struct json *results;
    size_t n_operations;
    size_t i;

    if (params->type != JSON_ARRAY
        || !params->u.array.n
        || params->u.array.elems[0]->type != JSON_STRING
        || strcmp(params->u.array.elems[0]->u.string, db->schema->name)) {
        if (params->type != JSON_ARRAY) {
            error = ovsdb_syntax_error(params, NULL, "array expected");
        } else {
            error = ovsdb_syntax_error(params, NULL, "database name expected "
                                       "as first parameter");
        }

        results = ovsdb_error_to_json(error);
        ovsdb_error_destroy(error);
        return results;
    }

    x.db = db;
    x.session = session;
    x.txn = ovsdb_txn_create(db);
    x.symtab = ovsdb_symbol_table_create();
    x.durable = false;
    x.elapsed_msec = elapsed_msec;
    x.timeout_msec = LLONG_MAX;
    results = NULL;

    results = json_array_create_empty();
    n_operations = params->u.array.n - 1;
    error = NULL;
    for (i = 1; i <= n_operations; i++) {
        struct json *operation = params->u.array.elems[i];
        struct ovsdb_error *parse_error;
        struct ovsdb_parser parser;
        struct json *result;
        const struct json *op;

        /* Parse and execute operation. */
        ovsdb_parser_init(&parser, operation,
                          "ovsdb operation %"PRIuSIZE" of %"PRIuSIZE, i, n_operations);
        op = ovsdb_parser_member(&parser, "op", OP_ID);
        result = json_object_create();
        if (op) {
            const char *op_name = json_string(op);
            ovsdb_operation_executor *executor = lookup_executor(op_name);
            if (executor) {
                error = executor(&x, &parser, result);
            } else {
                ovsdb_parser_raise_error(&parser, "No operation \"%s\"",
                                         op_name);
            }
        } else {
            ovs_assert(ovsdb_parser_has_error(&parser));
        }

        /* A parse error overrides any other error.
         * An error overrides any other result. */
        parse_error = ovsdb_parser_finish(&parser);
        if (parse_error) {
            ovsdb_error_destroy(error);
            error = parse_error;
        }
        if (error) {
            json_destroy(result);
            result = ovsdb_error_to_json(error);
        }
        if (error && !strcmp(ovsdb_error_get_tag(error), "not supported")
            && timeout_msec) {
            ovsdb_txn_abort(x.txn);
            *timeout_msec = x.timeout_msec;

            json_destroy(result);
            json_destroy(results);
            results = NULL;
            goto exit;
        }

        /* Add result to array. */
        json_array_add(results, result);
        if (error) {
            break;
        }
    }

    if (!error) {
        error = ovsdb_txn_commit(x.txn, x.durable);
        if (error) {
            json_array_add(results, ovsdb_error_to_json(error));
        }
    } else {
        ovsdb_txn_abort(x.txn);
    }

    while (json_array(results)->n < n_operations) {
        json_array_add(results, json_null_create());
    }

exit:
    ovsdb_error_destroy(error);
    ovsdb_symbol_table_destroy(x.symtab);

    return results;
}
struct ovsdb_error *
ovsdb_base_type_from_json(struct ovsdb_base_type *base,
                          const struct json *json)
{
    struct ovsdb_parser parser;
    struct ovsdb_error *error;
    const struct json *type, *enum_;

    if (json->type == JSON_STRING) {
        error = ovsdb_atomic_type_from_json(&base->type, json);
        if (error) {
            return error;
        }
        ovsdb_base_type_init(base, base->type);
        return NULL;
    }

    ovsdb_parser_init(&parser, json, "ovsdb type");
    type = ovsdb_parser_member(&parser, "type", OP_STRING);
    if (ovsdb_parser_has_error(&parser)) {
        base->type = OVSDB_TYPE_VOID;
        return ovsdb_parser_finish(&parser);
    }

    error = ovsdb_atomic_type_from_json(&base->type, type);
    if (error) {
        return error;
    }

    ovsdb_base_type_init(base, base->type);

    enum_ = ovsdb_parser_member(&parser, "enum", OP_ANY | OP_OPTIONAL);
    if (enum_) {
        base->enum_ = xmalloc(sizeof *base->enum_);
        error = ovsdb_datum_from_json(
            base->enum_, ovsdb_base_type_get_enum_type(base->type),
            enum_, NULL);
        if (error) {
            free(base->enum_);
            base->enum_ = NULL;
        }
    } else if (base->type == OVSDB_TYPE_INTEGER) {
        const struct json *min, *max;

        min = ovsdb_parser_member(&parser, "minInteger",
                                  OP_INTEGER | OP_OPTIONAL);
        max = ovsdb_parser_member(&parser, "maxInteger",
                                  OP_INTEGER | OP_OPTIONAL);
        base->u.integer.min = min ? min->u.integer : INT64_MIN;
        base->u.integer.max = max ? max->u.integer : INT64_MAX;
        if (base->u.integer.min > base->u.integer.max) {
            error = ovsdb_syntax_error(json, NULL,
                                       "minInteger exceeds maxInteger");
        }
    } else if (base->type == OVSDB_TYPE_REAL) {
        const struct json *min, *max;

        min = ovsdb_parser_member(&parser, "minReal", OP_NUMBER | OP_OPTIONAL);
        max = ovsdb_parser_member(&parser, "maxReal", OP_NUMBER | OP_OPTIONAL);
        base->u.real.min = min ? json_real(min) : -DBL_MAX;
        base->u.real.max = max ? json_real(max) : DBL_MAX;
        if (base->u.real.min > base->u.real.max) {
            error = ovsdb_syntax_error(json, NULL, "minReal exceeds maxReal");
        }
    } else if (base->type == OVSDB_TYPE_STRING) {
        if (!error) {
            error = parse_optional_uint(&parser, "minLength",
                                        &base->u.string.minLen);
        }
        if (!error) {
            error = parse_optional_uint(&parser, "maxLength",
                                        &base->u.string.maxLen);
        }
        if (!error && base->u.string.minLen > base->u.string.maxLen) {
            error = ovsdb_syntax_error(json, NULL,
                                       "minLength exceeds maxLength");
        }
    } else if (base->type == OVSDB_TYPE_UUID) {
        const struct json *refTable;

        refTable = ovsdb_parser_member(&parser, "refTable",
                                       OP_ID | OP_OPTIONAL);
        if (refTable) {
            const struct json *refType;

            base->u.uuid.refTableName = xstrdup(refTable->u.string);

            /* We can't set base->u.uuid.refTable here because we don't have
             * enough context (we might not even be running in ovsdb-server).
             * ovsdb_create() will set refTable later. */

            refType = ovsdb_parser_member(&parser, "refType",
                                          OP_ID | OP_OPTIONAL);
            if (refType) {
                const char *refType_s = json_string(refType);
                if (!strcmp(refType_s, "strong")) {
                    base->u.uuid.refType = OVSDB_REF_STRONG;
                } else if (!strcmp(refType_s, "weak")) {
                    base->u.uuid.refType = OVSDB_REF_WEAK;
                } else {
                    error = ovsdb_syntax_error(json, NULL, "refType must be "
                                               "\"strong\" or \"weak\" (not "
                                               "\"%s\")", refType_s);
                }
            } else {
                base->u.uuid.refType = OVSDB_REF_STRONG;
            }
        }
    }

    if (error) {
        ovsdb_error_destroy(ovsdb_parser_finish(&parser));
    } else {
        error = ovsdb_parser_finish(&parser);
    }
    if (error) {
        ovsdb_base_type_destroy(base);
        base->type = OVSDB_TYPE_VOID;
    }
    return error;
}