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|
/*
* QEMU migration/snapshot declarations
*
* Copyright (c) 2009-2011 Red Hat, Inc.
*
* Original author: Juan Quintela <quintela@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef QEMU_VMSTATE_H
#define QEMU_VMSTATE_H
#include "migration/qjson.h"
typedef int LoadStateHandler(QEMUFile *f, void *opaque, int version_id);
typedef struct VMStateInfo VMStateInfo;
typedef struct VMStateDescription VMStateDescription;
typedef struct VMStateField VMStateField;
/* VMStateInfo allows customized migration of objects that don't fit in
* any category in VMStateFlags. Additional information is always passed
* into get and put in terms of field and vmdesc parameters. However
* these two parameters should only be used in cases when customized
* handling is needed, such as QTAILQ. For primitive data types such as
* integer, field and vmdesc parameters should be ignored inside get/put.
*/
struct VMStateInfo {
const char *name;
int (*get)(QEMUFile *f, void *pv, size_t size, VMStateField *field);
int (*put)(QEMUFile *f, void *pv, size_t size, VMStateField *field,
QJSON *vmdesc);
};
enum VMStateFlags {
/* Ignored */
VMS_SINGLE = 0x001,
/* The struct member at opaque + VMStateField.offset is a pointer
* to the actual field (e.g. struct a { uint8_t *b;
* }). Dereference the pointer before using it as basis for
* further pointer arithmetic (see e.g. VMS_ARRAY). Does not
* affect the meaning of VMStateField.num_offset or
* VMStateField.size_offset; see VMS_VARRAY* and VMS_VBUFFER for
* those. */
VMS_POINTER = 0x002,
/* The field is an array of fixed size. VMStateField.num contains
* the number of entries in the array. The size of each entry is
* given by VMStateField.size and / or opaque +
* VMStateField.size_offset; see VMS_VBUFFER and
* VMS_MULTIPLY. Each array entry will be processed individually
* (VMStateField.info.get()/put() if VMS_STRUCT is not set,
* recursion into VMStateField.vmsd if VMS_STRUCT is set). May not
* be combined with VMS_VARRAY*. */
VMS_ARRAY = 0x004,
/* The field is itself a struct, containing one or more
* fields. Recurse into VMStateField.vmsd. Most useful in
* combination with VMS_ARRAY / VMS_VARRAY*, recursing into each
* array entry. */
VMS_STRUCT = 0x008,
/* The field is an array of variable size. The int32_t at opaque +
* VMStateField.num_offset contains the number of entries in the
* array. See the VMS_ARRAY description regarding array handling
* in general. May not be combined with VMS_ARRAY or any other
* VMS_VARRAY*. */
VMS_VARRAY_INT32 = 0x010,
/* Ignored */
VMS_BUFFER = 0x020,
/* The field is a (fixed-size or variable-size) array of pointers
* (e.g. struct a { uint8_t *b[]; }). Dereference each array entry
* before using it. Note: Does not imply any one of VMS_ARRAY /
* VMS_VARRAY*; these need to be set explicitly. */
VMS_ARRAY_OF_POINTER = 0x040,
/* The field is an array of variable size. The uint16_t at opaque
* + VMStateField.num_offset (subject to VMS_MULTIPLY_ELEMENTS)
* contains the number of entries in the array. See the VMS_ARRAY
* description regarding array handling in general. May not be
* combined with VMS_ARRAY or any other VMS_VARRAY*. */
VMS_VARRAY_UINT16 = 0x080,
/* The size of the individual entries (a single array entry if
* VMS_ARRAY or any of VMS_VARRAY* are set, or the field itself if
* neither is set) is variable (i.e. not known at compile-time),
* but the same for all entries. Use the int32_t at opaque +
* VMStateField.size_offset (subject to VMS_MULTIPLY) to determine
* the size of each (and every) entry. */
VMS_VBUFFER = 0x100,
/* Multiply the entry size given by the int32_t at opaque +
* VMStateField.size_offset (see VMS_VBUFFER description) with
* VMStateField.size to determine the number of bytes to be
* allocated. Only valid in combination with VMS_VBUFFER. */
VMS_MULTIPLY = 0x200,
/* The field is an array of variable size. The uint8_t at opaque +
* VMStateField.num_offset (subject to VMS_MULTIPLY_ELEMENTS)
* contains the number of entries in the array. See the VMS_ARRAY
* description regarding array handling in general. May not be
* combined with VMS_ARRAY or any other VMS_VARRAY*. */
VMS_VARRAY_UINT8 = 0x400,
/* The field is an array of variable size. The uint32_t at opaque
* + VMStateField.num_offset (subject to VMS_MULTIPLY_ELEMENTS)
* contains the number of entries in the array. See the VMS_ARRAY
* description regarding array handling in general. May not be
* combined with VMS_ARRAY or any other VMS_VARRAY*. */
VMS_VARRAY_UINT32 = 0x800,
/* Fail loading the serialised VM state if this field is missing
* from the input. */
VMS_MUST_EXIST = 0x1000,
/* When loading serialised VM state, allocate memory for the
* (entire) field. Only valid in combination with
* VMS_POINTER. Note: Not all combinations with other flags are
* currently supported, e.g. VMS_ALLOC|VMS_ARRAY_OF_POINTER won't
* cause the individual entries to be allocated. */
VMS_ALLOC = 0x2000,
/* Multiply the number of entries given by the integer at opaque +
* VMStateField.num_offset (see VMS_VARRAY*) with VMStateField.num
* to determine the number of entries in the array. Only valid in
* combination with one of VMS_VARRAY*. */
VMS_MULTIPLY_ELEMENTS = 0x4000,
};
typedef enum {
MIG_PRI_DEFAULT = 0,
MIG_PRI_IOMMU, /* Must happen before PCI devices */
MIG_PRI_MAX,
} MigrationPriority;
struct VMStateField {
const char *name;
size_t offset;
size_t size;
size_t start;
int num;
size_t num_offset;
size_t size_offset;
const VMStateInfo *info;
enum VMStateFlags flags;
const VMStateDescription *vmsd;
int version_id;
bool (*field_exists)(void *opaque, int version_id);
};
struct VMStateDescription {
const char *name;
int unmigratable;
int version_id;
int minimum_version_id;
int minimum_version_id_old;
MigrationPriority priority;
LoadStateHandler *load_state_old;
int (*pre_load)(void *opaque);
int (*post_load)(void *opaque, int version_id);
void (*pre_save)(void *opaque);
bool (*needed)(void *opaque);
VMStateField *fields;
const VMStateDescription **subsections;
};
extern const VMStateDescription vmstate_dummy;
extern const VMStateInfo vmstate_info_bool;
extern const VMStateInfo vmstate_info_int8;
extern const VMStateInfo vmstate_info_int16;
extern const VMStateInfo vmstate_info_int32;
extern const VMStateInfo vmstate_info_int64;
extern const VMStateInfo vmstate_info_uint8_equal;
extern const VMStateInfo vmstate_info_uint16_equal;
extern const VMStateInfo vmstate_info_int32_equal;
extern const VMStateInfo vmstate_info_uint32_equal;
extern const VMStateInfo vmstate_info_uint64_equal;
extern const VMStateInfo vmstate_info_int32_le;
extern const VMStateInfo vmstate_info_uint8;
extern const VMStateInfo vmstate_info_uint16;
extern const VMStateInfo vmstate_info_uint32;
extern const VMStateInfo vmstate_info_uint64;
/** Put this in the stream when migrating a null pointer.*/
#define VMS_NULLPTR_MARKER (0x30U) /* '0' */
extern const VMStateInfo vmstate_info_nullptr;
extern const VMStateInfo vmstate_info_float64;
extern const VMStateInfo vmstate_info_cpudouble;
extern const VMStateInfo vmstate_info_timer;
extern const VMStateInfo vmstate_info_buffer;
extern const VMStateInfo vmstate_info_unused_buffer;
extern const VMStateInfo vmstate_info_tmp;
extern const VMStateInfo vmstate_info_bitmap;
extern const VMStateInfo vmstate_info_qtailq;
#define type_check_2darray(t1,t2,n,m) ((t1(*)[n][m])0 - (t2*)0)
#define type_check_array(t1,t2,n) ((t1(*)[n])0 - (t2*)0)
#define type_check_pointer(t1,t2) ((t1**)0 - (t2*)0)
#define vmstate_offset_value(_state, _field, _type) \
(offsetof(_state, _field) + \
type_check(_type, typeof_field(_state, _field)))
#define vmstate_offset_pointer(_state, _field, _type) \
(offsetof(_state, _field) + \
type_check_pointer(_type, typeof_field(_state, _field)))
#define vmstate_offset_array(_state, _field, _type, _num) \
(offsetof(_state, _field) + \
type_check_array(_type, typeof_field(_state, _field), _num))
#define vmstate_offset_2darray(_state, _field, _type, _n1, _n2) \
(offsetof(_state, _field) + \
type_check_2darray(_type, typeof_field(_state, _field), _n1, _n2))
#define vmstate_offset_sub_array(_state, _field, _type, _start) \
vmstate_offset_value(_state, _field[_start], _type)
#define vmstate_offset_buffer(_state, _field) \
vmstate_offset_array(_state, _field, uint8_t, \
sizeof(typeof_field(_state, _field)))
#define VMSTATE_SINGLE_TEST(_field, _state, _test, _version, _info, _type) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.field_exists = (_test), \
.size = sizeof(_type), \
.info = &(_info), \
.flags = VMS_SINGLE, \
.offset = vmstate_offset_value(_state, _field, _type), \
}
/* Validate state using a boolean predicate. */
#define VMSTATE_VALIDATE(_name, _test) { \
.name = (_name), \
.field_exists = (_test), \
.flags = VMS_ARRAY | VMS_MUST_EXIST, \
.num = 0, /* 0 elements: no data, only run _test */ \
}
#define VMSTATE_POINTER(_field, _state, _version, _info, _type) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_SINGLE|VMS_POINTER, \
.offset = vmstate_offset_value(_state, _field, _type), \
}
#define VMSTATE_POINTER_TEST(_field, _state, _test, _info, _type) { \
.name = (stringify(_field)), \
.info = &(_info), \
.field_exists = (_test), \
.size = sizeof(_type), \
.flags = VMS_SINGLE|VMS_POINTER, \
.offset = vmstate_offset_value(_state, _field, _type), \
}
#define VMSTATE_ARRAY(_field, _state, _num, _version, _info, _type) {\
.name = (stringify(_field)), \
.version_id = (_version), \
.num = (_num), \
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_ARRAY, \
.offset = vmstate_offset_array(_state, _field, _type, _num), \
}
#define VMSTATE_2DARRAY(_field, _state, _n1, _n2, _version, _info, _type) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.num = (_n1) * (_n2), \
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_ARRAY, \
.offset = vmstate_offset_2darray(_state, _field, _type, _n1, _n2), \
}
#define VMSTATE_VARRAY_MULTIPLY(_field, _state, _field_num, _multiply, _info, _type) { \
.name = (stringify(_field)), \
.num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\
.num = (_multiply), \
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_VARRAY_UINT32|VMS_MULTIPLY_ELEMENTS, \
.offset = offsetof(_state, _field), \
}
#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 = vmstate_offset_array(_state, _field, _type, _num),\
}
#define VMSTATE_SUB_ARRAY(_field, _state, _start, _num, _version, _info, _type) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.num = (_num), \
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_ARRAY, \
.offset = vmstate_offset_sub_array(_state, _field, _type, _start), \
}
#define VMSTATE_ARRAY_INT32_UNSAFE(_field, _state, _field_num, _info, _type) {\
.name = (stringify(_field)), \
.num_offset = vmstate_offset_value(_state, _field_num, int32_t), \
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_VARRAY_INT32, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_VARRAY_INT32(_field, _state, _field_num, _version, _info, _type) {\
.name = (stringify(_field)), \
.version_id = (_version), \
.num_offset = vmstate_offset_value(_state, _field_num, int32_t), \
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_VARRAY_INT32|VMS_POINTER, \
.offset = vmstate_offset_pointer(_state, _field, _type), \
}
#define VMSTATE_VARRAY_UINT32(_field, _state, _field_num, _version, _info, _type) {\
.name = (stringify(_field)), \
.version_id = (_version), \
.num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_VARRAY_UINT32|VMS_POINTER, \
.offset = vmstate_offset_pointer(_state, _field, _type), \
}
#define VMSTATE_VARRAY_UINT32_ALLOC(_field, _state, _field_num, _version, _info, _type) {\
.name = (stringify(_field)), \
.version_id = (_version), \
.num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_VARRAY_UINT32|VMS_POINTER|VMS_ALLOC, \
.offset = vmstate_offset_pointer(_state, _field, _type), \
}
#define VMSTATE_VARRAY_UINT16_UNSAFE(_field, _state, _field_num, _version, _info, _type) {\
.name = (stringify(_field)), \
.version_id = (_version), \
.num_offset = vmstate_offset_value(_state, _field_num, uint16_t),\
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_VARRAY_UINT16, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_STRUCT_TEST(_field, _state, _test, _version, _vmsd, _type) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.field_exists = (_test), \
.vmsd = &(_vmsd), \
.size = sizeof(_type), \
.flags = VMS_STRUCT, \
.offset = vmstate_offset_value(_state, _field, _type), \
}
#define VMSTATE_STRUCT_POINTER_V(_field, _state, _version, _vmsd, _type) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.vmsd = &(_vmsd), \
.size = sizeof(_type *), \
.flags = VMS_STRUCT|VMS_POINTER, \
.offset = vmstate_offset_pointer(_state, _field, _type), \
}
#define VMSTATE_STRUCT_POINTER_TEST_V(_field, _state, _test, _version, _vmsd, _type) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.field_exists = (_test), \
.vmsd = &(_vmsd), \
.size = sizeof(_type *), \
.flags = VMS_STRUCT|VMS_POINTER, \
.offset = vmstate_offset_pointer(_state, _field, _type), \
}
#define VMSTATE_ARRAY_OF_POINTER(_field, _state, _num, _version, _info, _type) {\
.name = (stringify(_field)), \
.version_id = (_version), \
.num = (_num), \
.info = &(_info), \
.size = sizeof(_type), \
.flags = VMS_ARRAY|VMS_ARRAY_OF_POINTER, \
.offset = vmstate_offset_array(_state, _field, _type, _num), \
}
#define VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(_f, _s, _n, _v, _vmsd, _type) { \
.name = (stringify(_f)), \
.version_id = (_v), \
.num = (_n), \
.vmsd = &(_vmsd), \
.size = sizeof(_type *), \
.flags = VMS_ARRAY|VMS_STRUCT|VMS_ARRAY_OF_POINTER, \
.offset = vmstate_offset_array(_s, _f, _type*, _n), \
}
#define VMSTATE_STRUCT_SUB_ARRAY(_field, _state, _start, _num, _version, _vmsd, _type) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.num = (_num), \
.vmsd = &(_vmsd), \
.size = sizeof(_type), \
.flags = VMS_STRUCT|VMS_ARRAY, \
.offset = vmstate_offset_sub_array(_state, _field, _type, _start), \
}
#define VMSTATE_STRUCT_ARRAY_TEST(_field, _state, _num, _test, _version, _vmsd, _type) { \
.name = (stringify(_field)), \
.num = (_num), \
.field_exists = (_test), \
.version_id = (_version), \
.vmsd = &(_vmsd), \
.size = sizeof(_type), \
.flags = VMS_STRUCT|VMS_ARRAY, \
.offset = vmstate_offset_array(_state, _field, _type, _num),\
}
#define VMSTATE_STRUCT_2DARRAY_TEST(_field, _state, _n1, _n2, _test, \
_version, _vmsd, _type) { \
.name = (stringify(_field)), \
.num = (_n1) * (_n2), \
.field_exists = (_test), \
.version_id = (_version), \
.vmsd = &(_vmsd), \
.size = sizeof(_type), \
.flags = VMS_STRUCT | VMS_ARRAY, \
.offset = vmstate_offset_2darray(_state, _field, _type, \
_n1, _n2), \
}
#define VMSTATE_STRUCT_VARRAY_UINT8(_field, _state, _field_num, _version, _vmsd, _type) { \
.name = (stringify(_field)), \
.num_offset = vmstate_offset_value(_state, _field_num, uint8_t), \
.version_id = (_version), \
.vmsd = &(_vmsd), \
.size = sizeof(_type), \
.flags = VMS_STRUCT|VMS_VARRAY_UINT8, \
.offset = offsetof(_state, _field), \
}
/* a variable length array (i.e. _type *_field) but we know the
* length
*/
#define VMSTATE_STRUCT_VARRAY_POINTER_KNOWN(_field, _state, _num, _version, _vmsd, _type) { \
.name = (stringify(_field)), \
.num = (_num), \
.version_id = (_version), \
.vmsd = &(_vmsd), \
.size = sizeof(_type), \
.flags = VMS_STRUCT|VMS_ARRAY|VMS_POINTER, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_STRUCT_VARRAY_POINTER_INT32(_field, _state, _field_num, _vmsd, _type) { \
.name = (stringify(_field)), \
.version_id = 0, \
.num_offset = vmstate_offset_value(_state, _field_num, int32_t), \
.size = sizeof(_type), \
.vmsd = &(_vmsd), \
.flags = VMS_POINTER | VMS_VARRAY_INT32 | VMS_STRUCT, \
.offset = vmstate_offset_pointer(_state, _field, _type), \
}
#define VMSTATE_STRUCT_VARRAY_POINTER_UINT32(_field, _state, _field_num, _vmsd, _type) { \
.name = (stringify(_field)), \
.version_id = 0, \
.num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\
.size = sizeof(_type), \
.vmsd = &(_vmsd), \
.flags = VMS_POINTER | VMS_VARRAY_INT32 | VMS_STRUCT, \
.offset = vmstate_offset_pointer(_state, _field, _type), \
}
#define VMSTATE_STRUCT_VARRAY_POINTER_UINT16(_field, _state, _field_num, _vmsd, _type) { \
.name = (stringify(_field)), \
.version_id = 0, \
.num_offset = vmstate_offset_value(_state, _field_num, uint16_t),\
.size = sizeof(_type), \
.vmsd = &(_vmsd), \
.flags = VMS_POINTER | VMS_VARRAY_UINT16 | VMS_STRUCT, \
.offset = vmstate_offset_pointer(_state, _field, _type), \
}
#define VMSTATE_STRUCT_VARRAY_INT32(_field, _state, _field_num, _version, _vmsd, _type) { \
.name = (stringify(_field)), \
.num_offset = vmstate_offset_value(_state, _field_num, int32_t), \
.version_id = (_version), \
.vmsd = &(_vmsd), \
.size = sizeof(_type), \
.flags = VMS_STRUCT|VMS_VARRAY_INT32, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_STRUCT_VARRAY_UINT32(_field, _state, _field_num, _version, _vmsd, _type) { \
.name = (stringify(_field)), \
.num_offset = vmstate_offset_value(_state, _field_num, uint32_t), \
.version_id = (_version), \
.vmsd = &(_vmsd), \
.size = sizeof(_type), \
.flags = VMS_STRUCT|VMS_VARRAY_UINT32, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_STRUCT_VARRAY_ALLOC(_field, _state, _field_num, _version, _vmsd, _type) {\
.name = (stringify(_field)), \
.version_id = (_version), \
.vmsd = &(_vmsd), \
.num_offset = vmstate_offset_value(_state, _field_num, int32_t), \
.size = sizeof(_type), \
.flags = VMS_STRUCT|VMS_VARRAY_INT32|VMS_ALLOC|VMS_POINTER, \
.offset = vmstate_offset_pointer(_state, _field, _type), \
}
#define VMSTATE_STATIC_BUFFER(_field, _state, _version, _test, _start, _size) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.field_exists = (_test), \
.size = (_size - _start), \
.info = &vmstate_info_buffer, \
.flags = VMS_BUFFER, \
.offset = vmstate_offset_buffer(_state, _field) + _start, \
}
#define VMSTATE_VBUFFER_MULTIPLY(_field, _state, _version, _test, \
_field_size, _multiply) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.field_exists = (_test), \
.size_offset = vmstate_offset_value(_state, _field_size, uint32_t),\
.size = (_multiply), \
.info = &vmstate_info_buffer, \
.flags = VMS_VBUFFER|VMS_POINTER|VMS_MULTIPLY, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_VBUFFER(_field, _state, _version, _test, _field_size) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.field_exists = (_test), \
.size_offset = vmstate_offset_value(_state, _field_size, int32_t),\
.info = &vmstate_info_buffer, \
.flags = VMS_VBUFFER|VMS_POINTER, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_VBUFFER_UINT32(_field, _state, _version, _test, _field_size) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.field_exists = (_test), \
.size_offset = vmstate_offset_value(_state, _field_size, uint32_t),\
.info = &vmstate_info_buffer, \
.flags = VMS_VBUFFER|VMS_POINTER, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_VBUFFER_ALLOC_UINT32(_field, _state, _version, \
_test, _field_size) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.field_exists = (_test), \
.size_offset = vmstate_offset_value(_state, _field_size, uint32_t),\
.info = &vmstate_info_buffer, \
.flags = VMS_VBUFFER|VMS_POINTER|VMS_ALLOC, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_BUFFER_UNSAFE_INFO_TEST(_field, _state, _test, _version, _info, _size) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.field_exists = (_test), \
.size = (_size), \
.info = &(_info), \
.flags = VMS_BUFFER, \
.offset = offsetof(_state, _field), \
}
#define VMSTATE_BUFFER_POINTER_UNSAFE(_field, _state, _version, _size) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.size = (_size), \
.info = &vmstate_info_buffer, \
.flags = VMS_BUFFER|VMS_POINTER, \
.offset = offsetof(_state, _field), \
}
/* Allocate a temporary of type 'tmp_type', set tmp->parent to _state
* and execute the vmsd on the temporary. Note that we're working with
* the whole of _state here, not a field within it.
* We compile time check that:
* That _tmp_type contains a 'parent' member that's a pointer to the
* '_state' type
* That the pointer is right at the start of _tmp_type.
*/
#define VMSTATE_WITH_TMP(_state, _tmp_type, _vmsd) { \
.name = "tmp", \
.size = sizeof(_tmp_type) + \
QEMU_BUILD_BUG_ON_ZERO(offsetof(_tmp_type, parent) != 0) + \
type_check_pointer(_state, \
typeof_field(_tmp_type, parent)), \
.vmsd = &(_vmsd), \
.info = &vmstate_info_tmp, \
}
#define VMSTATE_UNUSED_BUFFER(_test, _version, _size) { \
.name = "unused", \
.field_exists = (_test), \
.version_id = (_version), \
.size = (_size), \
.info = &vmstate_info_unused_buffer, \
.flags = VMS_BUFFER, \
}
/* Discard size * field_num bytes, where field_num is a uint32 member */
#define VMSTATE_UNUSED_VARRAY_UINT32(_state, _test, _version, _field_num, _size) {\
.name = "unused", \
.field_exists = (_test), \
.num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\
.version_id = (_version), \
.size = (_size), \
.info = &vmstate_info_unused_buffer, \
.flags = VMS_VARRAY_UINT32 | VMS_BUFFER, \
}
/* _field_size should be a int32_t field in the _state struct giving the
* size of the bitmap _field in bits.
*/
#define VMSTATE_BITMAP(_field, _state, _version, _field_size) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.size_offset = vmstate_offset_value(_state, _field_size, int32_t),\
.info = &vmstate_info_bitmap, \
.flags = VMS_VBUFFER|VMS_POINTER, \
.offset = offsetof(_state, _field), \
}
/* For migrating a QTAILQ.
* Target QTAILQ needs be properly initialized.
* _type: type of QTAILQ element
* _next: name of QTAILQ entry field in QTAILQ element
* _vmsd: VMSD for QTAILQ element
* size: size of QTAILQ element
* start: offset of QTAILQ entry in QTAILQ element
*/
#define VMSTATE_QTAILQ_V(_field, _state, _version, _vmsd, _type, _next) \
{ \
.name = (stringify(_field)), \
.version_id = (_version), \
.vmsd = &(_vmsd), \
.size = sizeof(_type), \
.info = &vmstate_info_qtailq, \
.offset = offsetof(_state, _field), \
.start = offsetof(_type, _next), \
}
/* _f : field name
_f_n : num of elements field_name
_n : num of elements
_s : struct state name
_v : version
*/
#define VMSTATE_SINGLE(_field, _state, _version, _info, _type) \
VMSTATE_SINGLE_TEST(_field, _state, NULL, _version, _info, _type)
#define VMSTATE_STRUCT(_field, _state, _version, _vmsd, _type) \
VMSTATE_STRUCT_TEST(_field, _state, NULL, _version, _vmsd, _type)
#define VMSTATE_STRUCT_POINTER(_field, _state, _vmsd, _type) \
VMSTATE_STRUCT_POINTER_V(_field, _state, 0, _vmsd, _type)
#define VMSTATE_STRUCT_POINTER_TEST(_field, _state, _test, _vmsd, _type) \
VMSTATE_STRUCT_POINTER_TEST_V(_field, _state, _test, 0, _vmsd, _type)
#define VMSTATE_STRUCT_ARRAY(_field, _state, _num, _version, _vmsd, _type) \
VMSTATE_STRUCT_ARRAY_TEST(_field, _state, _num, NULL, _version, \
_vmsd, _type)
#define VMSTATE_STRUCT_2DARRAY(_field, _state, _n1, _n2, _version, \
_vmsd, _type) \
VMSTATE_STRUCT_2DARRAY_TEST(_field, _state, _n1, _n2, NULL, \
_version, _vmsd, _type)
#define VMSTATE_BUFFER_UNSAFE_INFO(_field, _state, _version, _info, _size) \
VMSTATE_BUFFER_UNSAFE_INFO_TEST(_field, _state, NULL, _version, _info, \
_size)
#define VMSTATE_BOOL_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_bool, bool)
#define VMSTATE_INT8_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int8, int8_t)
#define VMSTATE_INT16_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int16, int16_t)
#define VMSTATE_INT32_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int32, int32_t)
#define VMSTATE_INT64_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int64, int64_t)
#define VMSTATE_UINT8_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint8, uint8_t)
#define VMSTATE_UINT16_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint16, uint16_t)
#define VMSTATE_UINT32_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint32, uint32_t)
#define VMSTATE_UINT64_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint64, uint64_t)
#define VMSTATE_BOOL(_f, _s) \
VMSTATE_BOOL_V(_f, _s, 0)
#define VMSTATE_INT8(_f, _s) \
VMSTATE_INT8_V(_f, _s, 0)
#define VMSTATE_INT16(_f, _s) \
VMSTATE_INT16_V(_f, _s, 0)
#define VMSTATE_INT32(_f, _s) \
VMSTATE_INT32_V(_f, _s, 0)
#define VMSTATE_INT64(_f, _s) \
VMSTATE_INT64_V(_f, _s, 0)
#define VMSTATE_UINT8(_f, _s) \
VMSTATE_UINT8_V(_f, _s, 0)
#define VMSTATE_UINT16(_f, _s) \
VMSTATE_UINT16_V(_f, _s, 0)
#define VMSTATE_UINT32(_f, _s) \
VMSTATE_UINT32_V(_f, _s, 0)
#define VMSTATE_UINT64(_f, _s) \
VMSTATE_UINT64_V(_f, _s, 0)
#define VMSTATE_UINT8_EQUAL(_f, _s) \
VMSTATE_SINGLE(_f, _s, 0, vmstate_info_uint8_equal, uint8_t)
#define VMSTATE_UINT16_EQUAL(_f, _s) \
VMSTATE_SINGLE(_f, _s, 0, vmstate_info_uint16_equal, uint16_t)
#define VMSTATE_UINT16_EQUAL_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint16_equal, uint16_t)
#define VMSTATE_INT32_EQUAL(_f, _s) \
VMSTATE_SINGLE(_f, _s, 0, vmstate_info_int32_equal, int32_t)
#define VMSTATE_UINT32_EQUAL_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint32_equal, uint32_t)
#define VMSTATE_UINT32_EQUAL(_f, _s) \
VMSTATE_UINT32_EQUAL_V(_f, _s, 0)
#define VMSTATE_UINT64_EQUAL_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint64_equal, uint64_t)
#define VMSTATE_UINT64_EQUAL(_f, _s) \
VMSTATE_UINT64_EQUAL_V(_f, _s, 0)
#define VMSTATE_INT32_POSITIVE_LE(_f, _s) \
VMSTATE_SINGLE(_f, _s, 0, vmstate_info_int32_le, int32_t)
#define VMSTATE_INT8_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_int8, int8_t)
#define VMSTATE_INT16_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_int16, int16_t)
#define VMSTATE_INT32_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_int32, int32_t)
#define VMSTATE_INT64_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_int64, int64_t)
#define VMSTATE_UINT8_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint8, uint8_t)
#define VMSTATE_UINT16_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint16, uint16_t)
#define VMSTATE_UINT32_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint32, uint32_t)
#define VMSTATE_UINT64_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint64, uint64_t)
#define VMSTATE_FLOAT64_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_float64, float64)
#define VMSTATE_FLOAT64(_f, _s) \
VMSTATE_FLOAT64_V(_f, _s, 0)
#define VMSTATE_TIMER_PTR_TEST(_f, _s, _test) \
VMSTATE_POINTER_TEST(_f, _s, _test, vmstate_info_timer, QEMUTimer *)
#define VMSTATE_TIMER_PTR_V(_f, _s, _v) \
VMSTATE_POINTER(_f, _s, _v, vmstate_info_timer, QEMUTimer *)
#define VMSTATE_TIMER_PTR(_f, _s) \
VMSTATE_TIMER_PTR_V(_f, _s, 0)
#define VMSTATE_TIMER_PTR_ARRAY(_f, _s, _n) \
VMSTATE_ARRAY_OF_POINTER(_f, _s, _n, 0, vmstate_info_timer, QEMUTimer *)
#define VMSTATE_TIMER_TEST(_f, _s, _test) \
VMSTATE_SINGLE_TEST(_f, _s, _test, 0, vmstate_info_timer, QEMUTimer)
#define VMSTATE_TIMER_V(_f, _s, _v) \
VMSTATE_SINGLE(_f, _s, _v, vmstate_info_timer, QEMUTimer)
#define VMSTATE_TIMER(_f, _s) \
VMSTATE_TIMER_V(_f, _s, 0)
#define VMSTATE_TIMER_ARRAY(_f, _s, _n) \
VMSTATE_ARRAY(_f, _s, _n, 0, vmstate_info_timer, QEMUTimer)
#define VMSTATE_BOOL_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_bool, bool)
#define VMSTATE_BOOL_ARRAY(_f, _s, _n) \
VMSTATE_BOOL_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_UINT16_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint16, uint16_t)
#define VMSTATE_UINT16_2DARRAY_V(_f, _s, _n1, _n2, _v) \
VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint16, uint16_t)
#define VMSTATE_UINT16_ARRAY(_f, _s, _n) \
VMSTATE_UINT16_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_UINT16_2DARRAY(_f, _s, _n1, _n2) \
VMSTATE_UINT16_2DARRAY_V(_f, _s, _n1, _n2, 0)
#define VMSTATE_UINT8_2DARRAY_V(_f, _s, _n1, _n2, _v) \
VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint8, uint8_t)
#define VMSTATE_UINT8_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint8, uint8_t)
#define VMSTATE_UINT8_ARRAY(_f, _s, _n) \
VMSTATE_UINT8_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_UINT8_SUB_ARRAY(_f, _s, _start, _num) \
VMSTATE_SUB_ARRAY(_f, _s, _start, _num, 0, vmstate_info_uint8, uint8_t)
#define VMSTATE_UINT8_2DARRAY(_f, _s, _n1, _n2) \
VMSTATE_UINT8_2DARRAY_V(_f, _s, _n1, _n2, 0)
#define VMSTATE_UINT32_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint32, uint32_t)
#define VMSTATE_UINT32_2DARRAY_V(_f, _s, _n1, _n2, _v) \
VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint32, uint32_t)
#define VMSTATE_UINT32_ARRAY(_f, _s, _n) \
VMSTATE_UINT32_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_UINT32_2DARRAY(_f, _s, _n1, _n2) \
VMSTATE_UINT32_2DARRAY_V(_f, _s, _n1, _n2, 0)
#define VMSTATE_UINT64_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint64, uint64_t)
#define VMSTATE_UINT64_ARRAY(_f, _s, _n) \
VMSTATE_UINT64_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_UINT64_2DARRAY(_f, _s, _n1, _n2) \
VMSTATE_UINT64_2DARRAY_V(_f, _s, _n1, _n2, 0)
#define VMSTATE_UINT64_2DARRAY_V(_f, _s, _n1, _n2, _v) \
VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint64, uint64_t)
#define VMSTATE_INT16_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_int16, int16_t)
#define VMSTATE_INT16_ARRAY(_f, _s, _n) \
VMSTATE_INT16_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_INT32_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_int32, int32_t)
#define VMSTATE_INT32_ARRAY(_f, _s, _n) \
VMSTATE_INT32_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_UINT32_SUB_ARRAY(_f, _s, _start, _num) \
VMSTATE_SUB_ARRAY(_f, _s, _start, _num, 0, vmstate_info_uint32, uint32_t)
#define VMSTATE_INT64_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_int64, int64_t)
#define VMSTATE_INT64_ARRAY(_f, _s, _n) \
VMSTATE_INT64_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_FLOAT64_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_float64, float64)
#define VMSTATE_FLOAT64_ARRAY(_f, _s, _n) \
VMSTATE_FLOAT64_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_CPUDOUBLE_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_cpudouble, CPU_DoubleU)
#define VMSTATE_CPUDOUBLE_ARRAY(_f, _s, _n) \
VMSTATE_CPUDOUBLE_ARRAY_V(_f, _s, _n, 0)
#define VMSTATE_BUFFER_V(_f, _s, _v) \
VMSTATE_STATIC_BUFFER(_f, _s, _v, NULL, 0, sizeof(typeof_field(_s, _f)))
#define VMSTATE_BUFFER(_f, _s) \
VMSTATE_BUFFER_V(_f, _s, 0)
#define VMSTATE_PARTIAL_BUFFER(_f, _s, _size) \
VMSTATE_STATIC_BUFFER(_f, _s, 0, NULL, 0, _size)
#define VMSTATE_BUFFER_START_MIDDLE_V(_f, _s, _start, _v) \
VMSTATE_STATIC_BUFFER(_f, _s, _v, NULL, _start, sizeof(typeof_field(_s, _f)))
#define VMSTATE_BUFFER_START_MIDDLE(_f, _s, _start) \
VMSTATE_BUFFER_START_MIDDLE_V(_f, _s, _start, 0)
#define VMSTATE_PARTIAL_VBUFFER(_f, _s, _size) \
VMSTATE_VBUFFER(_f, _s, 0, NULL, _size)
#define VMSTATE_PARTIAL_VBUFFER_UINT32(_f, _s, _size) \
VMSTATE_VBUFFER_UINT32(_f, _s, 0, NULL, _size)
#define VMSTATE_BUFFER_TEST(_f, _s, _test) \
VMSTATE_STATIC_BUFFER(_f, _s, 0, _test, 0, sizeof(typeof_field(_s, _f)))
#define VMSTATE_BUFFER_UNSAFE(_field, _state, _version, _size) \
VMSTATE_BUFFER_UNSAFE_INFO(_field, _state, _version, vmstate_info_buffer, _size)
#define VMSTATE_UNUSED_V(_v, _size) \
VMSTATE_UNUSED_BUFFER(NULL, _v, _size)
#define VMSTATE_UNUSED(_size) \
VMSTATE_UNUSED_V(0, _size)
#define VMSTATE_UNUSED_TEST(_test, _size) \
VMSTATE_UNUSED_BUFFER(_test, 0, _size)
#define VMSTATE_END_OF_LIST() \
{}
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
void *opaque, int version_id);
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
void *opaque, QJSON *vmdesc);
bool vmstate_save_needed(const VMStateDescription *vmsd, void *opaque);
/* Returns: 0 on success, -1 on failure */
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
const VMStateDescription *vmsd,
void *base, int alias_id,
int required_for_version,
Error **errp);
/* Returns: 0 on success, -1 on failure */
static inline int vmstate_register(DeviceState *dev, int instance_id,
const VMStateDescription *vmsd,
void *opaque)
{
return vmstate_register_with_alias_id(dev, instance_id, vmsd,
opaque, -1, 0, NULL);
}
void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
void *opaque);
struct MemoryRegion;
void vmstate_register_ram(struct MemoryRegion *memory, DeviceState *dev);
void vmstate_unregister_ram(struct MemoryRegion *memory, DeviceState *dev);
void vmstate_register_ram_global(struct MemoryRegion *memory);
bool vmstate_check_only_migratable(const VMStateDescription *vmsd);
#endif
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