static int usb_msd_initfn_storage(USBDevice *dev) { MSDState *s = DO_UPCAST(MSDState, dev, dev); BlockDriverState *bs = s->conf.bs; SCSIDevice *scsi_dev; Error *err = NULL; if (!bs) { error_report("drive property not set"); return -1; } blkconf_serial(&s->conf, &dev->serial); /* * Hack alert: this pretends to be a block device, but it's really * a SCSI bus that can serve only a single device, which it * creates automatically. But first it needs to detach from its * blockdev, or else scsi_bus_legacy_add_drive() dies when it * attaches again. * * The hack is probably a bad idea. */ bdrv_detach_dev(bs, &s->dev.qdev); s->conf.bs = NULL; usb_desc_create_serial(dev); usb_desc_init(dev); scsi_bus_new(&s->bus, sizeof(s->bus), DEVICE(dev), &usb_msd_scsi_info_storage, NULL); scsi_dev = scsi_bus_legacy_add_drive(&s->bus, bs, 0, !!s->removable, s->conf.bootindex, dev->serial, &err); if (!scsi_dev) { return -1; } s->bus.qbus.allow_hotplug = 0; usb_msd_handle_reset(dev); if (bdrv_key_required(bs)) { if (cur_mon) { monitor_read_bdrv_key_start(cur_mon, bs, usb_msd_password_cb, s); s->dev.auto_attach = 0; } else { autostart = 0; } } return 0; }