static void
qemuDomainReAttachHostUsbDevices(struct qemud_driver *driver,
const char *name,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs)
{
int i;
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
usbDevice *usb, *tmp;
const char *used_by = NULL;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
continue;
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
continue;
if (hostdev->missing)
continue;
usb = usbGetDevice(hostdev->source.subsys.u.usb.bus,
hostdev->source.subsys.u.usb.device);
if (!usb) {
VIR_WARN("Unable to reattach USB device %03d.%03d on domain %s",
hostdev->source.subsys.u.usb.bus,
hostdev->source.subsys.u.usb.device,
name);
continue;
}
/* Delete only those USB devices which belongs
* to domain @name because qemuProcessStart() might
* have failed because USB device is already taken.
* Therefore we want to steal only those devices from
* the list which were taken by @name */
tmp = usbDeviceListFind(driver->activeUsbHostdevs, usb);
usbFreeDevice(usb);
if (!tmp) {
VIR_WARN("Unable to find device %03d.%03d "
"in list of active USB devices",
hostdev->source.subsys.u.usb.bus,
hostdev->source.subsys.u.usb.device);
continue;
}
used_by = usbDeviceGetUsedBy(tmp);
if (STREQ_NULLABLE(used_by, name)) {
VIR_DEBUG("Removing %03d.%03d dom=%s from activeUsbHostdevs",
hostdev->source.subsys.u.usb.bus,
hostdev->source.subsys.u.usb.device,
name);
usbDeviceListDel(driver->activeUsbHostdevs, tmp);
}
}
}
void
usbDeviceListDel(usbDeviceList *list,
usbDevice *dev)
{
usbDevice *ret = usbDeviceListSteal(list, dev);
if (ret)
usbFreeDevice(ret);
}
usbDevice *
usbGetDevice(unsigned int bus,
unsigned int devno,
const char *vroot)
{
usbDevice *dev;
if (VIR_ALLOC(dev) < 0) {
virReportOOMError();
return NULL;
}
dev->bus = bus;
dev->dev = devno;
if (snprintf(dev->name, sizeof(dev->name), "%.3o:%.3o",
dev->bus, dev->dev) >= sizeof(dev->name)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("dev->name buffer overflow: %.3o:%.3o"),
dev->bus, dev->dev);
usbFreeDevice(dev);
return NULL;
}
if (virAsprintf(&dev->path, "%s" USB_DEVFS "%03d/%03d",
vroot ? vroot : "",
dev->bus, dev->dev) < 0) {
virReportOOMError();
usbFreeDevice(dev);
return NULL;
}
/* XXX fixme. this should be product/vendor */
if (snprintf(dev->id, sizeof(dev->id), "%d %d", dev->bus,
dev->dev) >= sizeof(dev->id)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("dev->id buffer overflow: %d %d"),
dev->bus, dev->dev);
usbFreeDevice(dev);
return NULL;
}
VIR_DEBUG("%s %s: initialized", dev->id, dev->name);
return dev;
}
void
usbDeviceListFree(usbDeviceList *list)
{
int i;
if (!list)
return;
for (i = 0; i < list->count; i++)
usbFreeDevice(list->devs[i]);
VIR_FREE(list->devs);
VIR_FREE(list);
}
int
qemuUpdateActiveUsbHostdevs(struct qemud_driver *driver,
virDomainDefPtr def)
{
virDomainHostdevDefPtr hostdev = NULL;
int i;
if (!def->nhostdevs)
return 0;
for (i = 0; i < def->nhostdevs; i++) {
usbDevice *usb = NULL;
hostdev = def->hostdevs[i];
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
continue;
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
continue;
usb = usbGetDevice(hostdev->source.subsys.u.usb.bus,
hostdev->source.subsys.u.usb.device);
if (!usb) {
VIR_WARN("Unable to reattach USB device %03d.%03d on domain %s",
hostdev->source.subsys.u.usb.bus,
hostdev->source.subsys.u.usb.device,
def->name);
continue;
}
usbDeviceSetUsedBy(usb, def->name);
if (usbDeviceListAdd(driver->activeUsbHostdevs, usb) < 0) {
usbFreeDevice(usb);
return -1;
}
}
return 0;
}
static int
qemuPrepareHostUSBDevices(struct qemud_driver *driver,
virDomainDefPtr def,
bool coldBoot)
{
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];
bool required = true;
usbDevice *usb;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
continue;
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
continue;
if (hostdev->startupPolicy == VIR_DOMAIN_STARTUP_POLICY_OPTIONAL ||
(hostdev->startupPolicy == VIR_DOMAIN_STARTUP_POLICY_REQUISITE &&
!coldBoot))
required = false;
if (qemuFindHostdevUSBDevice(hostdev, required, &usb) < 0)
goto cleanup;
if (usb && 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;
}
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
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;
}
static usbDeviceList *
usbDeviceSearch(unsigned int vendor,
unsigned int product,
unsigned int bus,
unsigned int devno,
const char *vroot,
unsigned int flags)
{
DIR *dir = NULL;
bool found = false;
char *ignore = NULL;
struct dirent *de;
usbDeviceList *list = NULL, *ret = NULL;
usbDevice *usb;
if (!(list = usbDeviceListNew()))
goto cleanup;
dir = opendir(USB_SYSFS "/devices");
if (!dir) {
virReportSystemError(errno,
_("Could not open directory %s"),
USB_SYSFS "/devices");
goto cleanup;
}
while ((de = readdir(dir))) {
unsigned int found_prod, found_vend, found_bus, found_devno;
char *tmpstr = de->d_name;
if (de->d_name[0] == '.' || strchr(de->d_name, ':'))
continue;
if (usbSysReadFile("idVendor", de->d_name,
16, &found_vend) < 0)
goto cleanup;
if (usbSysReadFile("idProduct", de->d_name,
16, &found_prod) < 0)
goto cleanup;
if (STRPREFIX(de->d_name, "usb"))
tmpstr += 3;
if (virStrToLong_ui(tmpstr, &ignore, 10, &found_bus) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to parse dir name '%s'"),
de->d_name);
goto cleanup;
}
if (usbSysReadFile("devnum", de->d_name,
10, &found_devno) < 0)
goto cleanup;
if ((flags & USB_DEVICE_FIND_BY_VENDOR) &&
(found_prod != product || found_vend != vendor))
continue;
if (flags & USB_DEVICE_FIND_BY_BUS) {
if (found_bus != bus || found_devno != devno)
continue;
found = true;
}
usb = usbGetDevice(found_bus, found_devno, vroot);
if (!usb)
goto cleanup;
if (usbDeviceListAdd(list, usb) < 0) {
usbFreeDevice(usb);
goto cleanup;
}
if (found)
break;
}
ret = list;
cleanup:
if (dir) {
int saved_errno = errno;
closedir(dir);
errno = saved_errno;
}
if (!ret)
usbDeviceListFree(list);
return ret;
}