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authorPaolo Bonzini <pbonzini@redhat.com>2011-12-02 15:23:15 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2012-02-24 14:54:51 +0100
commit5db1764cc1f6ea18d92935e91c182b5526a392d1 (patch)
tree66edd48f2b1b64a2b88294461b91613c42e0fd43 /hw
parent06114d72f6dba13c66a5d16eeb52d5b52165117c (diff)
virtio-scsi: add migration support
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r--hw/virtio-scsi.c50
1 files changed, 49 insertions, 1 deletions
diff --git a/hw/virtio-scsi.c b/hw/virtio-scsi.c
index 1f3b851f2..e607edc91 100644
--- a/hw/virtio-scsi.c
+++ b/hw/virtio-scsi.c
@@ -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;
}