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vmstate: Add VMSTATE_BUFFER_UNUSED

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It allows to have 'things' in savevm format not backed in the device state
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Juan Quintela 2009-10-19 15:46:28 +02:00 committed by Anthony Liguori
parent d4829d4992
commit 76507c7548
2 changed files with 38 additions and 0 deletions
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18
hw/hw.h
View File

@ -335,6 +335,7 @@ extern const VMStateInfo vmstate_info_uint64;
extern const VMStateInfo vmstate_info_timer;
extern const VMStateInfo vmstate_info_ptimer;
extern const VMStateInfo vmstate_info_buffer;
extern const VMStateInfo vmstate_info_unused_buffer;
#define type_check_array(t1,t2,n) ((t1(*)[n])0 - (t2*)0)
#define type_check_pointer(t1,t2) ((t1**)0 - (t2*)0)
@ -471,6 +472,14 @@ extern const VMStateInfo vmstate_info_buffer;
.offset = vmstate_offset_buffer(_state, _field) + _start, \
}
#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, \
}
extern const VMStateDescription vmstate_pci_device;
#define VMSTATE_PCI_DEVICE(_field, _state) { \
@ -621,6 +630,15 @@ extern const VMStateDescription vmstate_i2c_slave;
#define VMSTATE_BUFFER_TEST(_f, _s, _test) \
VMSTATE_STATIC_BUFFER(_f, _s, 0, _test, 0, sizeof(typeof_field(_s, _f)))
#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)
#ifdef NEED_CPU_H
#if TARGET_LONG_BITS == 64
#define VMSTATE_UINTTL_V(_f, _s, _v) \

20
savevm.c
View File

@ -944,6 +944,26 @@ const VMStateInfo vmstate_info_buffer = {
.put = put_buffer,
};
/* unused buffers: space that was used for some fields that are
not usefull anymore */
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
{
qemu_fseek(f, size, SEEK_CUR);
return 0;
}
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
{
qemu_fseek(f, size, SEEK_CUR);
}
const VMStateInfo vmstate_info_unused_buffer = {
.name = "unused_buffer",
.get = get_unused_buffer,
.put = put_unused_buffer,
};
typedef struct SaveStateEntry {
QTAILQ_ENTRY(SaveStateEntry) entry;
char idstr[256];