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vmstate: Add suppot for field_exist() test 

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Juan Quintela 2009-09-29 22:49:07 +02:00 committed by Anthony Liguori
parent 3c8ce630c5
commit f11f6a5fff
2 changed files with 49 additions and 17 deletions
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26
hw/hw.h
View File

@ -10,6 +10,7 @@
#include "cpu-common.h"
#endif
#include <stdbool.h>
#include "ioport.h"
#include "irq.h"
@ -299,6 +300,7 @@ typedef struct {
enum VMStateFlags flags;
const VMStateDescription *vmsd;
int version_id;
bool (*field_exists)(void *opaque, int version_id);
} VMStateField;
struct VMStateDescription {
@ -345,6 +347,16 @@ extern const VMStateInfo vmstate_info_buffer;
+ type_check(_type,typeof_field(_state, _field)) \
}
#define VMSTATE_SINGLE_TEST(_field, _state, _test, _info, _type) { \
.name = (stringify(_field)), \
.field_exists = (_test), \
.size = sizeof(_type), \
.info = &(_info), \
.flags = VMS_SINGLE, \
.offset = offsetof(_state, _field) \
+ type_check(_type,typeof_field(_state, _field)) \
}
#define VMSTATE_POINTER(_field, _state, _version, _info, _type) { \
.name = (stringify(_field)), \
.version_id = (_version), \
@ -366,6 +378,17 @@ extern const VMStateInfo vmstate_info_buffer;
+ type_check_array(_type,typeof_field(_state, _field),_num) \
}
#define VMSTATE_ARRAY_TEST(_field, _state, _num, _test, _info, _type) {\
.name = (stringify(_field)), \
.field_exists = (_test), \
.num = (_num), \
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_ARRAY, \
.offset = offsetof(_state, _field) \
+ type_check_array(_type,typeof_field(_state, _field),_num) \
}
#define VMSTATE_VARRAY(_field, _state, _field_num, _version, _info, _type) {\
.name = (stringify(_field)), \
.version_id = (_version), \
@ -524,6 +547,9 @@ extern const VMStateDescription vmstate_i2c_slave;
#define VMSTATE_INT32_LE(_f, _s) \
VMSTATE_SINGLE(_f, _s, 0, vmstate_info_int32_le, int32_t)
#define VMSTATE_UINT32_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, vmstate_info_uint32, uint32_t)
#define VMSTATE_TIMER_V(_f, _s, _v) \
VMSTATE_POINTER(_f, _s, _v, vmstate_info_timer, QEMUTimer *)

40
savevm.c
View File

@ -1055,7 +1055,10 @@ int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
return ret;
}
while(field->name) {
if (field->version_id <= version_id) {
if ((field->field_exists &&
field->field_exists(opaque, version_id)) ||
(!field->field_exists &&
field->version_id <= version_id)) {
void *base_addr = opaque + field->offset;
int ret, i, n_elems = 1;
@ -1101,24 +1104,27 @@ void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
vmsd->pre_save(opaque);
}
while(field->name) {
void *base_addr = opaque + field->offset;
int i, n_elems = 1;
if (!field->field_exists ||
field->field_exists(opaque, vmsd->version_id)) {
void *base_addr = opaque + field->offset;
int i, n_elems = 1;
if (field->flags & VMS_ARRAY) {
n_elems = field->num;
} else if (field->flags & VMS_VARRAY) {
n_elems = *(size_t *)(opaque+field->num_offset);
}
if (field->flags & VMS_POINTER) {
base_addr = *(void **)base_addr;
}
for (i = 0; i < n_elems; i++) {
void *addr = base_addr + field->size * i;
if (field->flags & VMS_ARRAY) {
n_elems = field->num;
} else if (field->flags & VMS_VARRAY) {
n_elems = *(size_t *)(opaque+field->num_offset);
}
if (field->flags & VMS_POINTER) {
base_addr = *(void **)base_addr;
}
for (i = 0; i < n_elems; i++) {
void *addr = base_addr + field->size * i;
if (field->flags & VMS_STRUCT) {
vmstate_save_state(f, field->vmsd, addr);
} else {
field->info->put(f, addr, field->size);
if (field->flags & VMS_STRUCT) {
vmstate_save_state(f, field->vmsd, addr);
} else {
field->info->put(f, addr, field->size);
}
}
}
field++;