示例#1
0
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);
}
示例#2
0
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;
}
示例#3
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;
}
示例#4
0
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);
}