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virtio-scsi: add migration support

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Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-12-02 15:23:15 +01:00
parent 06114d72f6
commit 5db1764cc1
1 changed files with 49 additions and 1 deletions
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50
hw/virtio-scsi.c
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@ -237,6 +237,34 @@ static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq)
return req;
}
static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq)
{
VirtIOSCSIReq *req = sreq->hba_private;
qemu_put_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem));
}
static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq)
{
SCSIBus *bus = sreq->bus;
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus);
VirtIOSCSIReq *req;
req = g_malloc(sizeof(*req));
qemu_get_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem));
virtio_scsi_parse_req(s, s->cmd_vq, req);
scsi_req_ref(sreq);
req->sreq = sreq;
if (req->sreq->cmd.mode != SCSI_XFER_NONE) {
int req_mode =
(req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV);
assert(req->sreq->cmd.mode == req_mode);
}
return req;
}
static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
{
SCSIDevice *d = virtio_scsi_device_find(s, req->req.tmf->lun);
@ -518,6 +546,22 @@ static void virtio_scsi_reset(VirtIODevice *vdev)
s->cdb_size = VIRTIO_SCSI_CDB_SIZE;
}
/* The device does not have anything to save beyond the virtio data.
* Request data is saved with callbacks from SCSI devices.
*/
static void virtio_scsi_save(QEMUFile *f, void *opaque)
{
VirtIOSCSI *s = opaque;
virtio_save(&s->vdev, f);
}
static int virtio_scsi_load(QEMUFile *f, void *opaque, int version_id)
{
VirtIOSCSI *s = opaque;
virtio_load(&s->vdev, f);
return 0;
}
static struct SCSIBusInfo virtio_scsi_scsi_info = {
.tcq = true,
.max_channel = VIRTIO_SCSI_MAX_CHANNEL,
@ -527,11 +571,14 @@ static struct SCSIBusInfo virtio_scsi_scsi_info = {
.complete = virtio_scsi_command_complete,
.cancel = virtio_scsi_request_cancelled,
.get_sg_list = virtio_scsi_get_sg_list,
.save_request = virtio_scsi_save_request,
.load_request = virtio_scsi_load_request,
};
VirtIODevice *virtio_scsi_init(DeviceState *dev, VirtIOSCSIConf *proxyconf)
{
VirtIOSCSI *s;
static int virtio_scsi_id;
s = (VirtIOSCSI *)virtio_common_init("virtio-scsi", VIRTIO_ID_SCSI,
sizeof(VirtIOSCSIConfig),
@ -558,7 +605,8 @@ VirtIODevice *virtio_scsi_init(DeviceState *dev, VirtIOSCSIConf *proxyconf)
scsi_bus_legacy_handle_cmdline(&s->bus);
}
/* TODO savevm */
register_savevm(dev, "virtio-scsi", virtio_scsi_id++, 1,
virtio_scsi_save, virtio_scsi_load, s);
return &s->vdev;
}