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qemu: Add option to treat missing USB devices as success

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All USB device lookup functions emit an error when they cannot find the
requested device. With this patch, their caller can choose if a missing
device is an error or normal condition.
This commit is contained in:
Jiri Denemark 2012-10-03 16:57:28 +02:00
parent 7bcc7278bf
commit 059aff6b98
8 changed files with 145 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/conf/domain_conf.h
View File

@ -386,6 +386,7 @@ struct _virDomainHostdevDef {
int mode; /* enum virDomainHostdevMode */
int startupPolicy; /* enum virDomainStartupPolicy */
unsigned int managed : 1;
unsigned int missing : 1;
union {
virDomainHostdevSubsys subsys;
struct {

57
src/qemu/qemu_hostdev.c
View File

@ -641,42 +641,57 @@ error:
return -1;
}
usbDevice *
qemuFindHostdevUSBDevice(virDomainHostdevDefPtr hostdev)
int
qemuFindHostdevUSBDevice(virDomainHostdevDefPtr hostdev,
bool mandatory,
usbDevice **usb)
{
usbDevice *usb = NULL;
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;
int rc;
*usb = NULL;
if (vendor && bus) {
usb = usbFindDevice(vendor, product, bus, device);
rc = usbFindDevice(vendor, product, bus, device, mandatory, usb);
if (rc < 0)
return -1;
} else if (vendor && !bus) {
usbDeviceList *devs = usbFindDeviceByVendor(vendor, product);
if (!devs)
return NULL;
usbDeviceList *devs;
if (usbDeviceListCount(devs) > 1) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("multiple USB devices for %x:%x, "
"use <address> to specify one"), vendor, product);
usbDeviceListFree(devs);
return NULL;
rc = usbFindDeviceByVendor(vendor, product, mandatory, &devs);
if (rc < 0)
return -1;
if (rc == 1) {
*usb = usbDeviceListGet(devs, 0);
usbDeviceListSteal(devs, *usb);
}
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);
if (rc == 0) {
goto out;
} else if (rc > 1) {
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);
} else if (!vendor && bus) {
usb = usbFindDeviceByBus(bus, device);
if (usbFindDeviceByBus(bus, device, mandatory, usb) < 0)
return -1;
}
return usb;
out:
if (!*usb)
hostdev->missing = 1;
return 0;
}
static int
@ -708,7 +723,7 @@ qemuPrepareHostUSBDevices(struct qemud_driver *driver,
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
continue;
if (!(usb = qemuFindHostdevUSBDevice(hostdev)))
if (qemuFindHostdevUSBDevice(hostdev, true, &usb) < 0)
goto cleanup;
if (usbDeviceListAdd(list, usb) < 0) {

4
src/qemu/qemu_hostdev.h
View File

@ -36,7 +36,9 @@ int qemuPrepareHostdevPCIDevices(struct qemud_driver *driver,
const unsigned char *uuid,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs);
usbDevice *qemuFindHostdevUSBDevice(virDomainHostdevDefPtr hostdev);
int qemuFindHostdevUSBDevice(virDomainHostdevDefPtr hostdev,
bool mandatory,
usbDevice **usb);
int qemuPrepareHostdevUSBDevices(struct qemud_driver *driver,
const char *name,
usbDeviceList *list);

2
src/qemu/qemu_hotplug.c
View File

@ -1153,7 +1153,7 @@ int qemuDomainAttachHostDevice(struct qemud_driver *driver,
goto cleanup;
if (hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB) {
if (!(usb = qemuFindHostdevUSBDevice(hostdev)))
if (qemuFindHostdevUSBDevice(hostdev, true, &usb) < 0)
goto cleanup;
if (usbDeviceListAdd(list, usb) < 0) {

16
src/security/security_dac.c
View File

@ -495,9 +495,13 @@ virSecurityDACSetSecurityHostdevLabel(virSecurityManagerPtr mgr,
switch (dev->source.subsys.type) {
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB: {
usbDevice *usb = usbGetDevice(dev->source.subsys.u.usb.bus,
dev->source.subsys.u.usb.device);
usbDevice *usb;
if (dev->missing)
return 0;
usb = usbGetDevice(dev->source.subsys.u.usb.bus,
dev->source.subsys.u.usb.device);
if (!usb)
goto done;
@ -568,9 +572,13 @@ virSecurityDACRestoreSecurityHostdevLabel(virSecurityManagerPtr mgr,
switch (dev->source.subsys.type) {
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB: {
usbDevice *usb = usbGetDevice(dev->source.subsys.u.usb.bus,
dev->source.subsys.u.usb.device);
usbDevice *usb;
if (dev->missing)
return 0;
usb = usbGetDevice(dev->source.subsys.u.usb.bus,
dev->source.subsys.u.usb.device);
if (!usb)
goto done;

16
src/security/security_selinux.c
View File

@ -1101,9 +1101,13 @@ virSecuritySELinuxSetSecurityHostdevLabel(virSecurityManagerPtr mgr ATTRIBUTE_UN
switch (dev->source.subsys.type) {
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB: {
usbDevice *usb = usbGetDevice(dev->source.subsys.u.usb.bus,
dev->source.subsys.u.usb.device);
usbDevice *usb;
if (dev->missing)
return 0;
usb = usbGetDevice(dev->source.subsys.u.usb.bus,
dev->source.subsys.u.usb.device);
if (!usb)
goto done;
@ -1174,9 +1178,13 @@ virSecuritySELinuxRestoreSecurityHostdevLabel(virSecurityManagerPtr mgr ATTRIBUT
switch (dev->source.subsys.type) {
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB: {
usbDevice *usb = usbGetDevice(dev->source.subsys.u.usb.bus,
dev->source.subsys.u.usb.device);
usbDevice *usb;
if (dev->missing)
return 0;
usb = usbGetDevice(dev->source.subsys.u.usb.bus,
dev->source.subsys.u.usb.device);
if (!usb)
goto done;

91
src/util/hostusb.c
View File

@ -186,76 +186,117 @@ cleanup:
return ret;
}
usbDeviceList *
usbFindDeviceByVendor(unsigned int vendor, unsigned product)
int
usbFindDeviceByVendor(unsigned int vendor,
unsigned product,
bool mandatory,
usbDeviceList **devices)
{
usbDeviceList *list;
int count;
if (!(list = usbDeviceSearch(vendor, product, 0 , 0,
USB_DEVICE_FIND_BY_VENDOR)))
return NULL;
return -1;
if (list->count == 0) {
usbDeviceListFree(list);
if (!mandatory) {
VIR_DEBUG("Did not find USB device %x:%x",
vendor, product);
if (devices)
*devices = NULL;
return 0;
}
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Did not find USB device %x:%x"), vendor, product);
usbDeviceListFree(list);
return NULL;
return -1;
}
return list;
count = list->count;
if (devices)
*devices = list;
else
usbDeviceListFree(list);
return count;
}
usbDevice *
usbFindDeviceByBus(unsigned int bus, unsigned devno)
int
usbFindDeviceByBus(unsigned int bus,
unsigned devno,
bool mandatory,
usbDevice **usb)
{
usbDevice *usb;
usbDeviceList *list;
if (!(list = usbDeviceSearch(0, 0, bus, devno,
USB_DEVICE_FIND_BY_BUS)))
return NULL;
return -1;
if (list->count == 0) {
usbDeviceListFree(list);
if (!mandatory) {
VIR_DEBUG("Did not find USB device bus:%u device:%u",
bus, devno);
if (usb)
*usb = NULL;
return 0;
}
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Did not find USB device bus:%u device:%u"),
bus, devno);
usbDeviceListFree(list);
return NULL;
return -1;
}
usb = usbDeviceListGet(list, 0);
usbDeviceListSteal(list, usb);
if (usb) {
*usb = usbDeviceListGet(list, 0);
usbDeviceListSteal(list, *usb);
}
usbDeviceListFree(list);
return usb;
return 0;
}
usbDevice *
int
usbFindDevice(unsigned int vendor,
unsigned int product,
unsigned int bus,
unsigned int devno)
unsigned int devno,
bool mandatory,
usbDevice **usb)
{
usbDevice *usb;
usbDeviceList *list;
unsigned int flags = USB_DEVICE_FIND_BY_VENDOR|USB_DEVICE_FIND_BY_BUS;
if (!(list = usbDeviceSearch(vendor, product, bus, devno, flags)))
return NULL;
return -1;
if (list->count == 0) {
usbDeviceListFree(list);
if (!mandatory) {
VIR_DEBUG("Did not find USB device %x:%x bus:%u device:%u",
vendor, product, bus, devno);
if (usb)
*usb = NULL;
return 0;
}
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Did not find USB device %x:%x bus:%u device:%u"),
vendor, product, bus, devno);
usbDeviceListFree(list);
return NULL;
return -1;
}
usb = usbDeviceListGet(list, 0);
usbDeviceListSteal(list, usb);
if (usb) {
*usb = usbDeviceListGet(list, 0);
usbDeviceListSteal(list, *usb);
}
usbDeviceListFree(list);
return usb;
return 0;
}
usbDevice *

22
src/util/hostusb.h
View File

@ -31,16 +31,22 @@ typedef struct _usbDeviceList usbDeviceList;
usbDevice *usbGetDevice(unsigned int bus,
unsigned int devno);
usbDevice *usbFindDeviceByBus(unsigned int bus,
unsigned int devno);
int usbFindDeviceByBus(unsigned int bus,
unsigned int devno,
bool mandatory,
usbDevice **usb);
usbDeviceList *usbFindDeviceByVendor(unsigned int vendor,
unsigned int product);
int usbFindDeviceByVendor(unsigned int vendor,
unsigned int product,
bool mandatory,
usbDeviceList **devices);
usbDevice *usbFindDevice(unsigned int vendor,
unsigned int product,
unsigned int bus,
unsigned int devno);
int usbFindDevice(unsigned int vendor,
unsigned int product,
unsigned int bus,
unsigned int devno,
bool mandatory,
usbDevice **usb);
void usbFreeDevice (usbDevice *dev);
void usbDeviceSetUsedBy(usbDevice *dev, const char *name);