diff options
Diffstat (limited to 'hw/scsi/virtio-scsi.c')
| -rw-r--r-- | hw/scsi/virtio-scsi.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 0eb069ae9b..2dd92552e0 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -406,6 +406,30 @@ static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status, virtio_scsi_complete_cmd_req(req); } +static int virtio_scsi_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, + uint8_t *buf, void *hba_private) +{ + VirtIOSCSIReq *req = hba_private; + + if (cmd->len == 0) { + cmd->len = MIN(VIRTIO_SCSI_CDB_SIZE, SCSI_CMD_BUF_SIZE); + memcpy(cmd->buf, buf, cmd->len); + } + + /* Extract the direction and mode directly from the request, for + * host device passthrough. + */ + cmd->xfer = req->qsgl.size; + if (cmd->xfer == 0) { + cmd->mode = SCSI_XFER_NONE; + } else if (iov_size(req->elem.in_sg, req->elem.in_num) > req->resp_size) { + cmd->mode = SCSI_XFER_FROM_DEV; + } else { + cmd->mode = SCSI_XFER_TO_DEV; + } + return 0; +} + static QEMUSGList *virtio_scsi_get_sg_list(SCSIRequest *r) { VirtIOSCSIReq *req = r->hba_private; @@ -658,6 +682,7 @@ static struct SCSIBusInfo virtio_scsi_scsi_info = { .change = virtio_scsi_change, .hotplug = virtio_scsi_hotplug, .hot_unplug = virtio_scsi_hot_unplug, + .parse_cdb = virtio_scsi_parse_cdb, .get_sg_list = virtio_scsi_get_sg_list, .save_request = virtio_scsi_save_request, .load_request = virtio_scsi_load_request, |