static int qemuPrepareHostUSBDevices(struct qemud_driver *driver, virDomainDefPtr def) { int i, ret = -1; usbDeviceList *list; usbDevice *tmp; virDomainHostdevDefPtr *hostdevs = def->hostdevs; int nhostdevs = def->nhostdevs; /* To prevent situation where USB device is assigned to two domains * we need to keep a list of currently assigned USB devices. * This is done in several loops which cannot be joined into one big * loop. See qemuPrepareHostdevPCIDevices() */ if (!(list = usbDeviceListNew())) goto cleanup; /* Loop 1: build temporary list */ for (i = 0 ; i < nhostdevs ; i++) { virDomainHostdevDefPtr hostdev = hostdevs[i]; usbDevice *usb = NULL; if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) continue; if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB) continue; unsigned vendor = hostdev->source.subsys.u.usb.vendor; unsigned product = hostdev->source.subsys.u.usb.product; unsigned bus = hostdev->source.subsys.u.usb.bus; unsigned device = hostdev->source.subsys.u.usb.device; if (vendor && bus) { usb = usbFindDevice(vendor, product, bus, device); } else if (vendor && !bus) { usbDeviceList *devs = usbFindDeviceByVendor(vendor, product); if (!devs) goto cleanup; if (usbDeviceListCount(devs) > 1) { virReportError(VIR_ERR_OPERATION_FAILED, _("multiple USB devices for %x:%x, " "use <address> to specify one"), vendor, product); usbDeviceListFree(devs); goto cleanup; } usb = usbDeviceListGet(devs, 0); usbDeviceListSteal(devs, usb); usbDeviceListFree(devs); hostdev->source.subsys.u.usb.bus = usbDeviceGetBus(usb); hostdev->source.subsys.u.usb.device = usbDeviceGetDevno(usb); } else if (!vendor && bus) { usb = usbFindDeviceByBus(bus, device); } if (!usb) goto cleanup; if (usbDeviceListAdd(list, usb) < 0) { usbFreeDevice(usb); goto cleanup; } } /* Mark devices in temporary list as used by @name * and add them do driver list. However, if something goes * wrong, perform rollback. */ if (qemuPrepareHostdevUSBDevices(driver, def->name, list) < 0) goto cleanup; /* Loop 2: Temporary list was successfully merged with * driver list, so steal all items to avoid freeing them * in cleanup label. */ while (usbDeviceListCount(list) > 0) { tmp = usbDeviceListGet(list, 0); usbDeviceListSteal(list, tmp); } ret = 0; cleanup: usbDeviceListFree(list); return ret; }
int qemuFindHostdevUSBDevice(virDomainHostdevDefPtr hostdev, bool mandatory, usbDevice **usb) { unsigned vendor = hostdev->source.subsys.u.usb.vendor; unsigned product = hostdev->source.subsys.u.usb.product; unsigned bus = hostdev->source.subsys.u.usb.bus; unsigned device = hostdev->source.subsys.u.usb.device; bool autoAddress = hostdev->source.subsys.u.usb.autoAddress; int rc; *usb = NULL; if (vendor && bus) { rc = usbFindDevice(vendor, product, bus, device, autoAddress ? false : mandatory, usb); if (rc < 0) { return -1; } else if (!autoAddress) { goto out; } else { VIR_INFO("USB device %x:%x could not be found at previous" " address (bus:%u device:%u)", vendor, product, bus, device); } } /* When vendor is specified, its USB address is either unspecified or the * device could not be found at the USB device where it had been * automatically found before. */ if (vendor) { usbDeviceList *devs; rc = usbFindDeviceByVendor(vendor, product, mandatory, &devs); if (rc < 0) return -1; if (rc == 1) { *usb = usbDeviceListGet(devs, 0); usbDeviceListSteal(devs, *usb); } usbDeviceListFree(devs); if (rc == 0) { goto out; } else if (rc > 1) { if (autoAddress) { virReportError(VIR_ERR_OPERATION_FAILED, _("Multiple USB devices for %x:%x were found," " but none of them is at bus:%u device:%u"), vendor, product, bus, device); } else { virReportError(VIR_ERR_OPERATION_FAILED, _("Multiple USB devices for %x:%x, " "use <address> to specify one"), vendor, product); } return -1; } hostdev->source.subsys.u.usb.bus = usbDeviceGetBus(*usb); hostdev->source.subsys.u.usb.device = usbDeviceGetDevno(*usb); hostdev->source.subsys.u.usb.autoAddress = true; if (autoAddress) { VIR_INFO("USB device %x:%x found at bus:%u device:%u (moved" " from bus:%u device:%u)", vendor, product, hostdev->source.subsys.u.usb.bus, hostdev->source.subsys.u.usb.device, bus, device); } } else if (!vendor && bus) { if (usbFindDeviceByBus(bus, device, mandatory, usb) < 0) return -1; } out: if (!*usb) hostdev->missing = 1; return 0; }
int qemuPrepareHostdevUSBDevices(struct qemud_driver *driver, const char *name, virDomainHostdevDefPtr *hostdevs, int nhostdevs) { int ret = -1; int i; usbDeviceList *list; usbDevice *tmp; /* To prevent situation where USB device is assigned to two domains * we need to keep a list of currently assigned USB devices. * This is done in several loops which cannot be joined into one big * loop. See qemuPrepareHostdevPCIDevices() */ if (!(list = usbDeviceListNew())) goto cleanup; /* Loop 1: build temporary list and validate no usb device * is already taken */ for (i = 0 ; i < nhostdevs ; i++) { virDomainHostdevDefPtr hostdev = hostdevs[i]; if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) continue; if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB) continue; /* Resolve a vendor/product to bus/device */ if (hostdev->source.subsys.u.usb.vendor) { usbDevice *usb = usbFindDevice(hostdev->source.subsys.u.usb.vendor, hostdev->source.subsys.u.usb.product); if (!usb) return -1; hostdev->source.subsys.u.usb.bus = usbDeviceGetBus(usb); hostdev->source.subsys.u.usb.device = usbDeviceGetDevno(usb); if ((tmp = usbDeviceListFind(driver->activeUsbHostdevs, usb))) { const char *other_name = usbDeviceGetUsedBy(tmp); if (other_name) qemuReportError(VIR_ERR_OPERATION_INVALID, _("USB device %s is in use by domain %s"), usbDeviceGetName(tmp), other_name); else qemuReportError(VIR_ERR_OPERATION_INVALID, _("USB device %s is already in use"), usbDeviceGetName(tmp)); usbFreeDevice(usb); goto cleanup; } if (usbDeviceListAdd(list, usb) < 0) { usbFreeDevice(usb); goto cleanup; } } } /* Loop 2: Mark devices in temporary list as used by @name * and add them do driver list. However, if something goes * wrong, perform rollback. */ for (i = 0; i < usbDeviceListCount(list); i++) { tmp = usbDeviceListGet(list, i); usbDeviceSetUsedBy(tmp, name); if (usbDeviceListAdd(driver->activeUsbHostdevs, tmp) < 0) { usbFreeDevice(tmp); goto inactivedevs; } } /* Loop 3: Temporary list was successfully merged with * driver list, so steal all items to avoid freeing them * in cleanup label. */ while (usbDeviceListCount(list) > 0) { tmp = usbDeviceListGet(list, 0); usbDeviceListSteal(list, tmp); } ret = 0; goto cleanup; inactivedevs: /* Steal devices from driver->activeUsbHostdevs. * We will free them later. */ for (i = 0; i < usbDeviceListCount(list); i++) { tmp = usbDeviceListGet(list, i); usbDeviceListSteal(driver->activeUsbHostdevs, tmp); } cleanup: usbDeviceListFree(list); return ret; }