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migration: extend VMStateInfo

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Current migration code cannot handle some data structures such as
QTAILQ in qemu/queue.h. Here we extend the signatures of put/get
in VMStateInfo so that customized handling is supported. put now
will return int type.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

Signed-off-by: Jianjun Duan <duanj@linux.vnet.ibm.com>
Message-Id: <1484852453-12728-2-git-send-email-duanj@linux.vnet.ibm.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Jianjun Duan 2017-01-19 11:00:50 -08:00 • committed by Dr. David Alan Gilbert
parent d7fc72ceb5
commit 2c21ee769e
22 changed files with 262 additions and 105 deletions
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15
hw/virtio/virtio.c
View file

@ -1555,7 +1555,8 @@ static const VMStateDescription vmstate_virtio_ringsize = {
}
};
static int get_extra_state(QEMUFile *f, void *pv, size_t size)
static int get_extra_state(QEMUFile *f, void *pv, size_t size,
VMStateField *field)
{
VirtIODevice *vdev = pv;
BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
@ -1568,13 +1569,15 @@ static int get_extra_state(QEMUFile *f, void *pv, size_t size)
}
}
static void put_extra_state(QEMUFile *f, void *pv, size_t size)
static int put_extra_state(QEMUFile *f, void *pv, size_t size,
VMStateField *field, QJSON *vmdesc)
{
VirtIODevice *vdev = pv;
BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
k->save_extra_state(qbus->parent, f);
return 0;
}
static const VMStateInfo vmstate_info_extra_state = {
@ -1709,13 +1712,17 @@ void virtio_save(VirtIODevice *vdev, QEMUFile *f)
}
/* A wrapper for use as a VMState .put function */
static void virtio_device_put(QEMUFile *f, void *opaque, size_t size)
static int virtio_device_put(QEMUFile *f, void *opaque, size_t size,
VMStateField *field, QJSON *vmdesc)
{
virtio_save(VIRTIO_DEVICE(opaque), f);
return 0;
}
/* A wrapper for use as a VMState .get function */
static int virtio_device_get(QEMUFile *f, void *opaque, size_t size)
static int virtio_device_get(QEMUFile *f, void *opaque, size_t size,
VMStateField *field)
{
VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
DeviceClass *dc = DEVICE_CLASS(VIRTIO_DEVICE_GET_CLASS(vdev));