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Add VMState support for static sized buffers (uint_8) 

This patch adds support for static sized buffer and typecheks that the buffer is right.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Juan Quintela 2009-08-20 19:42:35 +02:00 committed by Anthony Liguori
parent 2d1e9f96a2
commit 6f67c50ff4
2 changed files with 39 additions and 0 deletions
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18
hw/hw.h
View File

@ -285,6 +285,7 @@ enum VMStateFlags {
VMS_ARRAY = 0x004,
VMS_STRUCT = 0x008,
VMS_VARRAY = 0x010, /* Array with size in another field */
VMS_BUFFER = 0x020, /* static sized buffer */
};
typedef struct {
@ -321,6 +322,7 @@ extern const VMStateInfo vmstate_info_uint32;
extern const VMStateInfo vmstate_info_uint64;
extern const VMStateInfo vmstate_info_timer;
extern const VMStateInfo vmstate_info_buffer;
#define type_check_array(t1,t2,n) ((t1(*)[n])0 - (t2*)0)
#define type_check_pointer(t1,t2) ((t1**)0 - (t2*)0)
@ -389,6 +391,16 @@ extern const VMStateInfo vmstate_info_timer;
+ type_check_array(_type,typeof_field(_state, _field),_num) \
}
#define VMSTATE_STATIC_BUFFER(_field, _state, _version) { \
.name = (stringify(_field)), \
.version_id = (_version), \
.size = sizeof(typeof_field(_state,_field)), \
.info = &vmstate_info_buffer, \
.flags = VMS_BUFFER, \
.offset = offsetof(_state, _field) \
+ type_check_array(uint8_t,typeof_field(_state, _field),sizeof(typeof_field(_state,_field))) \
}
/* _f : field name
_f_n : num of elements field_name
_n : num of elements
@ -459,6 +471,12 @@ extern const VMStateInfo vmstate_info_timer;
#define VMSTATE_INT32_VARRAY(_f, _s, _f_n) \
VMSTATE_INT32_VARRAY_V(_f, _s, _f_n, 0)
#define VMSTATE_BUFFER_V(_f, _s, _v) \
VMSTATE_STATIC_BUFFER(_f, _s, _v)
#define VMSTATE_BUFFER(_f, _s) \
VMSTATE_STATIC_BUFFER(_f, _s, 0)
#define VMSTATE_END_OF_LIST() \
{}

21
savevm.c
View File

@ -848,6 +848,27 @@ const VMStateInfo vmstate_info_timer = {
.put = put_timer,
};
/* uint8_t buffers */
static int get_buffer(QEMUFile *f, void *pv, size_t size)
{
uint8_t *v = pv;
qemu_get_buffer(f, v, size);
return 0;
}
static void put_buffer(QEMUFile *f, const void *pv, size_t size)
{
uint8_t *v = (void *)pv;
qemu_put_buffer(f, v, size);
}
const VMStateInfo vmstate_info_buffer = {
.name = "buffer",
.get = get_buffer,
.put = put_buffer,
};
typedef struct SaveStateEntry {
char idstr[256];
int instance_id;