mirror of
https://github.com/qemu/qemu.git
synced 2024-12-17 09:13:44 +08:00
7ce5fc63c7
The code to check policy for handling deprecated input is triplicated. Factor it out into compat_policy_input_ok() before I mess with it in the next commit. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20211028102520.747396-9-armbru@redhat.com> [Policy code moved from qmp-dispatch.c to qapi-util.c to make visitors link without qmp-dispatch.o]
445 lines
11 KiB
C
445 lines
11 KiB
C
/*
|
|
* Core Definitions for QAPI Visitor Classes
|
|
*
|
|
* Copyright (C) 2012-2016 Red Hat, Inc.
|
|
* Copyright IBM, Corp. 2011
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
|
|
* See the COPYING.LIB file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/compat-policy.h"
|
|
#include "qapi/error.h"
|
|
#include "qapi/qmp/qerror.h"
|
|
#include "qapi/visitor.h"
|
|
#include "qapi/visitor-impl.h"
|
|
#include "trace.h"
|
|
|
|
/* Zero-initialization must result in default policy */
|
|
QEMU_BUILD_BUG_ON(COMPAT_POLICY_INPUT_ACCEPT || COMPAT_POLICY_OUTPUT_ACCEPT);
|
|
|
|
|
|
void visit_complete(Visitor *v, void *opaque)
|
|
{
|
|
assert(v->type != VISITOR_OUTPUT || v->complete);
|
|
trace_visit_complete(v, opaque);
|
|
if (v->complete) {
|
|
v->complete(v, opaque);
|
|
}
|
|
}
|
|
|
|
void visit_free(Visitor *v)
|
|
{
|
|
trace_visit_free(v);
|
|
if (v) {
|
|
v->free(v);
|
|
}
|
|
}
|
|
|
|
bool visit_start_struct(Visitor *v, const char *name, void **obj,
|
|
size_t size, Error **errp)
|
|
{
|
|
bool ok;
|
|
|
|
trace_visit_start_struct(v, name, obj, size);
|
|
if (obj) {
|
|
assert(size);
|
|
assert(!(v->type & VISITOR_OUTPUT) || *obj);
|
|
}
|
|
ok = v->start_struct(v, name, obj, size, errp);
|
|
if (obj && (v->type & VISITOR_INPUT)) {
|
|
assert(ok != !*obj);
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
bool visit_check_struct(Visitor *v, Error **errp)
|
|
{
|
|
trace_visit_check_struct(v);
|
|
return v->check_struct ? v->check_struct(v, errp) : true;
|
|
}
|
|
|
|
void visit_end_struct(Visitor *v, void **obj)
|
|
{
|
|
trace_visit_end_struct(v, obj);
|
|
v->end_struct(v, obj);
|
|
}
|
|
|
|
bool visit_start_list(Visitor *v, const char *name, GenericList **list,
|
|
size_t size, Error **errp)
|
|
{
|
|
bool ok;
|
|
|
|
assert(!list || size >= sizeof(GenericList));
|
|
trace_visit_start_list(v, name, list, size);
|
|
ok = v->start_list(v, name, list, size, errp);
|
|
if (list && (v->type & VISITOR_INPUT)) {
|
|
assert(ok || !*list);
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
GenericList *visit_next_list(Visitor *v, GenericList *tail, size_t size)
|
|
{
|
|
assert(tail && size >= sizeof(GenericList));
|
|
trace_visit_next_list(v, tail, size);
|
|
return v->next_list(v, tail, size);
|
|
}
|
|
|
|
bool visit_check_list(Visitor *v, Error **errp)
|
|
{
|
|
trace_visit_check_list(v);
|
|
return v->check_list ? v->check_list(v, errp) : true;
|
|
}
|
|
|
|
void visit_end_list(Visitor *v, void **obj)
|
|
{
|
|
trace_visit_end_list(v, obj);
|
|
v->end_list(v, obj);
|
|
}
|
|
|
|
bool visit_start_alternate(Visitor *v, const char *name,
|
|
GenericAlternate **obj, size_t size,
|
|
Error **errp)
|
|
{
|
|
bool ok;
|
|
|
|
assert(obj && size >= sizeof(GenericAlternate));
|
|
assert(!(v->type & VISITOR_OUTPUT) || *obj);
|
|
trace_visit_start_alternate(v, name, obj, size);
|
|
if (!v->start_alternate) {
|
|
assert(!(v->type & VISITOR_INPUT));
|
|
return true;
|
|
}
|
|
ok = v->start_alternate(v, name, obj, size, errp);
|
|
if (v->type & VISITOR_INPUT) {
|
|
assert(ok != !*obj);
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
void visit_end_alternate(Visitor *v, void **obj)
|
|
{
|
|
trace_visit_end_alternate(v, obj);
|
|
if (v->end_alternate) {
|
|
v->end_alternate(v, obj);
|
|
}
|
|
}
|
|
|
|
bool visit_optional(Visitor *v, const char *name, bool *present)
|
|
{
|
|
trace_visit_optional(v, name, present);
|
|
if (v->optional) {
|
|
v->optional(v, name, present);
|
|
}
|
|
return *present;
|
|
}
|
|
|
|
bool visit_policy_reject(Visitor *v, const char *name,
|
|
unsigned special_features, Error **errp)
|
|
{
|
|
trace_visit_policy_reject(v, name);
|
|
if (v->policy_reject) {
|
|
return v->policy_reject(v, name, special_features, errp);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool visit_policy_skip(Visitor *v, const char *name,
|
|
unsigned special_features)
|
|
{
|
|
trace_visit_policy_skip(v, name);
|
|
if (v->policy_skip) {
|
|
return v->policy_skip(v, name, special_features);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void visit_set_policy(Visitor *v, CompatPolicy *policy)
|
|
{
|
|
v->compat_policy = *policy;
|
|
}
|
|
|
|
bool visit_is_input(Visitor *v)
|
|
{
|
|
return v->type == VISITOR_INPUT;
|
|
}
|
|
|
|
bool visit_is_dealloc(Visitor *v)
|
|
{
|
|
return v->type == VISITOR_DEALLOC;
|
|
}
|
|
|
|
bool visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp)
|
|
{
|
|
assert(obj);
|
|
trace_visit_type_int(v, name, obj);
|
|
return v->type_int64(v, name, obj, errp);
|
|
}
|
|
|
|
static bool visit_type_uintN(Visitor *v, uint64_t *obj, const char *name,
|
|
uint64_t max, const char *type, Error **errp)
|
|
{
|
|
uint64_t value = *obj;
|
|
|
|
assert(v->type == VISITOR_INPUT || value <= max);
|
|
|
|
if (!v->type_uint64(v, name, &value, errp)) {
|
|
return false;
|
|
}
|
|
if (value > max) {
|
|
assert(v->type == VISITOR_INPUT);
|
|
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
|
|
name ? name : "null", type);
|
|
return false;
|
|
}
|
|
*obj = value;
|
|
return true;
|
|
}
|
|
|
|
bool visit_type_uint8(Visitor *v, const char *name, uint8_t *obj,
|
|
Error **errp)
|
|
{
|
|
uint64_t value;
|
|
bool ok;
|
|
|
|
trace_visit_type_uint8(v, name, obj);
|
|
value = *obj;
|
|
ok = visit_type_uintN(v, &value, name, UINT8_MAX, "uint8_t", errp);
|
|
*obj = value;
|
|
return ok;
|
|
}
|
|
|
|
bool visit_type_uint16(Visitor *v, const char *name, uint16_t *obj,
|
|
Error **errp)
|
|
{
|
|
uint64_t value;
|
|
bool ok;
|
|
|
|
trace_visit_type_uint16(v, name, obj);
|
|
value = *obj;
|
|
ok = visit_type_uintN(v, &value, name, UINT16_MAX, "uint16_t", errp);
|
|
*obj = value;
|
|
return ok;
|
|
}
|
|
|
|
bool visit_type_uint32(Visitor *v, const char *name, uint32_t *obj,
|
|
Error **errp)
|
|
{
|
|
uint64_t value;
|
|
bool ok;
|
|
|
|
trace_visit_type_uint32(v, name, obj);
|
|
value = *obj;
|
|
ok = visit_type_uintN(v, &value, name, UINT32_MAX, "uint32_t", errp);
|
|
*obj = value;
|
|
return ok;
|
|
}
|
|
|
|
bool visit_type_uint64(Visitor *v, const char *name, uint64_t *obj,
|
|
Error **errp)
|
|
{
|
|
assert(obj);
|
|
trace_visit_type_uint64(v, name, obj);
|
|
return v->type_uint64(v, name, obj, errp);
|
|
}
|
|
|
|
static bool visit_type_intN(Visitor *v, int64_t *obj, const char *name,
|
|
int64_t min, int64_t max, const char *type,
|
|
Error **errp)
|
|
{
|
|
int64_t value = *obj;
|
|
|
|
assert(v->type == VISITOR_INPUT || (value >= min && value <= max));
|
|
|
|
if (!v->type_int64(v, name, &value, errp)) {
|
|
return false;
|
|
}
|
|
if (value < min || value > max) {
|
|
assert(v->type == VISITOR_INPUT);
|
|
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
|
|
name ? name : "null", type);
|
|
return false;
|
|
}
|
|
*obj = value;
|
|
return true;
|
|
}
|
|
|
|
bool visit_type_int8(Visitor *v, const char *name, int8_t *obj, Error **errp)
|
|
{
|
|
int64_t value;
|
|
bool ok;
|
|
|
|
trace_visit_type_int8(v, name, obj);
|
|
value = *obj;
|
|
ok = visit_type_intN(v, &value, name, INT8_MIN, INT8_MAX, "int8_t", errp);
|
|
*obj = value;
|
|
return ok;
|
|
}
|
|
|
|
bool visit_type_int16(Visitor *v, const char *name, int16_t *obj,
|
|
Error **errp)
|
|
{
|
|
int64_t value;
|
|
bool ok;
|
|
|
|
trace_visit_type_int16(v, name, obj);
|
|
value = *obj;
|
|
ok = visit_type_intN(v, &value, name, INT16_MIN, INT16_MAX, "int16_t",
|
|
errp);
|
|
*obj = value;
|
|
return ok;
|
|
}
|
|
|
|
bool visit_type_int32(Visitor *v, const char *name, int32_t *obj,
|
|
Error **errp)
|
|
{
|
|
int64_t value;
|
|
bool ok;
|
|
|
|
trace_visit_type_int32(v, name, obj);
|
|
value = *obj;
|
|
ok = visit_type_intN(v, &value, name, INT32_MIN, INT32_MAX, "int32_t",
|
|
errp);
|
|
*obj = value;
|
|
return ok;
|
|
}
|
|
|
|
bool visit_type_int64(Visitor *v, const char *name, int64_t *obj,
|
|
Error **errp)
|
|
{
|
|
assert(obj);
|
|
trace_visit_type_int64(v, name, obj);
|
|
return v->type_int64(v, name, obj, errp);
|
|
}
|
|
|
|
bool visit_type_size(Visitor *v, const char *name, uint64_t *obj,
|
|
Error **errp)
|
|
{
|
|
assert(obj);
|
|
trace_visit_type_size(v, name, obj);
|
|
if (v->type_size) {
|
|
return v->type_size(v, name, obj, errp);
|
|
}
|
|
return v->type_uint64(v, name, obj, errp);
|
|
}
|
|
|
|
bool visit_type_bool(Visitor *v, const char *name, bool *obj, Error **errp)
|
|
{
|
|
assert(obj);
|
|
trace_visit_type_bool(v, name, obj);
|
|
return v->type_bool(v, name, obj, errp);
|
|
}
|
|
|
|
bool visit_type_str(Visitor *v, const char *name, char **obj, Error **errp)
|
|
{
|
|
bool ok;
|
|
|
|
assert(obj);
|
|
/* TODO: Fix callers to not pass NULL when they mean "", so that we
|
|
* can enable:
|
|
assert(!(v->type & VISITOR_OUTPUT) || *obj);
|
|
*/
|
|
trace_visit_type_str(v, name, obj);
|
|
ok = v->type_str(v, name, obj, errp);
|
|
if (v->type & VISITOR_INPUT) {
|
|
assert(ok != !*obj);
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
bool visit_type_number(Visitor *v, const char *name, double *obj,
|
|
Error **errp)
|
|
{
|
|
assert(obj);
|
|
trace_visit_type_number(v, name, obj);
|
|
return v->type_number(v, name, obj, errp);
|
|
}
|
|
|
|
bool visit_type_any(Visitor *v, const char *name, QObject **obj, Error **errp)
|
|
{
|
|
bool ok;
|
|
|
|
assert(obj);
|
|
assert(v->type != VISITOR_OUTPUT || *obj);
|
|
trace_visit_type_any(v, name, obj);
|
|
ok = v->type_any(v, name, obj, errp);
|
|
if (v->type == VISITOR_INPUT) {
|
|
assert(ok != !*obj);
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
bool visit_type_null(Visitor *v, const char *name, QNull **obj,
|
|
Error **errp)
|
|
{
|
|
trace_visit_type_null(v, name, obj);
|
|
return v->type_null(v, name, obj, errp);
|
|
}
|
|
|
|
static bool output_type_enum(Visitor *v, const char *name, int *obj,
|
|
const QEnumLookup *lookup, Error **errp)
|
|
{
|
|
int value = *obj;
|
|
char *enum_str;
|
|
|
|
enum_str = (char *)qapi_enum_lookup(lookup, value);
|
|
return visit_type_str(v, name, &enum_str, errp);
|
|
}
|
|
|
|
static bool input_type_enum(Visitor *v, const char *name, int *obj,
|
|
const QEnumLookup *lookup, Error **errp)
|
|
{
|
|
int64_t value;
|
|
g_autofree char *enum_str = NULL;
|
|
|
|
if (!visit_type_str(v, name, &enum_str, errp)) {
|
|
return false;
|
|
}
|
|
|
|
value = qapi_enum_parse(lookup, enum_str, -1, NULL);
|
|
if (value < 0) {
|
|
error_setg(errp, "Parameter '%s' does not accept value '%s'",
|
|
name ? name : "null", enum_str);
|
|
return false;
|
|
}
|
|
|
|
if (lookup->special_features
|
|
&& !compat_policy_input_ok(lookup->special_features[value],
|
|
&v->compat_policy,
|
|
ERROR_CLASS_GENERIC_ERROR,
|
|
"value", enum_str, errp)) {
|
|
return false;
|
|
}
|
|
|
|
*obj = value;
|
|
return true;
|
|
}
|
|
|
|
bool visit_type_enum(Visitor *v, const char *name, int *obj,
|
|
const QEnumLookup *lookup, Error **errp)
|
|
{
|
|
assert(obj && lookup);
|
|
trace_visit_type_enum(v, name, obj);
|
|
switch (v->type) {
|
|
case VISITOR_INPUT:
|
|
return input_type_enum(v, name, obj, lookup, errp);
|
|
case VISITOR_OUTPUT:
|
|
return output_type_enum(v, name, obj, lookup, errp);
|
|
case VISITOR_CLONE:
|
|
/* nothing further to do, scalar value was already copied by
|
|
* g_memdup() during visit_start_*() */
|
|
return true;
|
|
case VISITOR_DEALLOC:
|
|
/* nothing to deallocate for a scalar */
|
|
return true;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|