int
virSCSIDeviceListAdd(virSCSIDeviceListPtr list,
virSCSIDevicePtr dev)
{
if (virSCSIDeviceListFind(list, dev)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Device %s already exists"),
dev->name);
return -1;
}
return VIR_APPEND_ELEMENT(list->devs, list->count, dev);
}
int
virSCSIDeviceListAdd(virSCSIDeviceListPtr list,
virSCSIDevicePtr dev)
{
if (virSCSIDeviceListFind(list, dev)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Device %s already exists"),
dev->name);
return -1;
}
if (VIR_REALLOC_N(list->devs, list->count + 1) < 0)
return -1;
list->devs[list->count++] = dev;
return 0;
}
int
qemuPrepareHostdevSCSIDevices(virQEMUDriverPtr driver,
const char *name,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs)
{
int i, j, count;
virSCSIDeviceListPtr list;
virSCSIDevicePtr tmp;
/* Loop 1: Add the shared scsi host device to shared device
* table.
*/
for (i = 0; i < nhostdevs; i++) {
virDomainDeviceDef dev;
dev.type = VIR_DOMAIN_DEVICE_HOSTDEV;
dev.data.hostdev = hostdevs[i];
if (qemuAddSharedDevice(driver, &dev, name) < 0)
return -1;
if (qemuSetUnprivSGIO(&dev) < 0)
return -1;
}
/* To prevent situation where SCSI device is assigned to two domains
* we need to keep a list of currently assigned SCSI devices.
* This is done in several loops which cannot be joined into one big
* loop. See qemuPrepareHostdevPCIDevices()
*/
if (!(list = virSCSIDeviceListNew()))
goto cleanup;
/* Loop 2: build temporary list */
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
virSCSIDevicePtr scsi;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS ||
hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI)
continue;
if (hostdev->managed) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("SCSI host device doesn't support managed mode"));
goto cleanup;
}
if (!(scsi = virSCSIDeviceNew(hostdev->source.subsys.u.scsi.adapter,
hostdev->source.subsys.u.scsi.bus,
hostdev->source.subsys.u.scsi.target,
hostdev->source.subsys.u.scsi.unit,
hostdev->readonly)))
goto cleanup;
if (scsi && virSCSIDeviceListAdd(list, scsi) < 0) {
virSCSIDeviceFree(scsi);
goto cleanup;
}
}
/* Loop 3: Mark devices in temporary list as used by @name
* and add them to driver list. However, if something goes
* wrong, perform rollback.
*/
virObjectLock(driver->activeScsiHostdevs);
count = virSCSIDeviceListCount(list);
for (i = 0; i < count; i++) {
virSCSIDevicePtr scsi = virSCSIDeviceListGet(list, i);
if ((tmp = virSCSIDeviceListFind(driver->activeScsiHostdevs, scsi))) {
const char *other_name = virSCSIDeviceGetUsedBy(tmp);
if (other_name)
virReportError(VIR_ERR_OPERATION_INVALID,
_("SCSI device %s is in use by domain %s"),
virSCSIDeviceGetName(tmp), other_name);
else
virReportError(VIR_ERR_OPERATION_INVALID,
_("SCSI device %s is already in use"),
virSCSIDeviceGetName(tmp));
goto error;
}
virSCSIDeviceSetUsedBy(scsi, name);
VIR_DEBUG("Adding %s to activeScsiHostdevs", virSCSIDeviceGetName(scsi));
if (virSCSIDeviceListAdd(driver->activeScsiHostdevs, scsi) < 0)
goto error;
}
virObjectUnlock(driver->activeScsiHostdevs);
/* Loop 4: Temporary list was successfully merged with
* driver list, so steal all items to avoid freeing them
* when freeing temporary list.
*/
while (virSCSIDeviceListCount(list) > 0) {
tmp = virSCSIDeviceListGet(list, 0);
virSCSIDeviceListSteal(list, tmp);
}
virObjectUnref(list);
return 0;
error:
for (j = 0; j < i; j++) {
tmp = virSCSIDeviceListGet(list, i);
virSCSIDeviceListSteal(driver->activeScsiHostdevs, tmp);
}
virObjectUnlock(driver->activeScsiHostdevs);
cleanup:
virObjectUnref(list);
return -1;
}
void
qemuDomainReAttachHostScsiDevices(virQEMUDriverPtr driver,
const char *name,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs)
{
int i;
virObjectLock(driver->activeScsiHostdevs);
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
virSCSIDevicePtr scsi, tmp;
const char *used_by = NULL;
virDomainDeviceDef dev;
dev.type = VIR_DOMAIN_DEVICE_HOSTDEV;
dev.data.hostdev = hostdev;
ignore_value(qemuRemoveSharedDevice(driver, &dev, name));
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS ||
hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI)
continue;
if (!(scsi = virSCSIDeviceNew(hostdev->source.subsys.u.scsi.adapter,
hostdev->source.subsys.u.scsi.bus,
hostdev->source.subsys.u.scsi.target,
hostdev->source.subsys.u.scsi.unit,
hostdev->readonly))) {
VIR_WARN("Unable to reattach SCSI device %s:%d:%d:%d on domain %s",
hostdev->source.subsys.u.scsi.adapter,
hostdev->source.subsys.u.scsi.bus,
hostdev->source.subsys.u.scsi.target,
hostdev->source.subsys.u.scsi.unit,
name);
continue;
}
/* Only delete the devices which are marked as being used by @name,
* because qemuProcessStart could fail on the half way. */
tmp = virSCSIDeviceListFind(driver->activeScsiHostdevs, scsi);
virSCSIDeviceFree(scsi);
if (!tmp) {
VIR_WARN("Unable to find device %s:%d:%d:%d "
"in list of active SCSI devices",
hostdev->source.subsys.u.scsi.adapter,
hostdev->source.subsys.u.scsi.bus,
hostdev->source.subsys.u.scsi.target,
hostdev->source.subsys.u.scsi.unit);
continue;
}
used_by = virSCSIDeviceGetUsedBy(tmp);
if (STREQ_NULLABLE(used_by, name)) {
VIR_DEBUG("Removing %s:%d:%d:%d dom=%s from activeScsiHostdevs",
hostdev->source.subsys.u.scsi.adapter,
hostdev->source.subsys.u.scsi.bus,
hostdev->source.subsys.u.scsi.target,
hostdev->source.subsys.u.scsi.unit,
name);
virSCSIDeviceListDel(driver->activeScsiHostdevs, tmp);
}
}
virObjectUnlock(driver->activeScsiHostdevs);
}