/*
* Make necessary checks for the need to check and for the current setting
* of the 'unpriv_sgio' value for the device_path passed.
*
* Returns:
* 0 - Success
* -1 - Some failure which would already have been messaged
* -2 - Mismatch with the "shared" sgio setting - needs to be messaged
* by caller since it has context of which type of disk resource is
* being used and in the future the hostdev information.
*/
static int
qemuCheckUnprivSGIO(virHashTablePtr sharedDevices,
const char *device_path,
int sgio)
{
char *sysfs_path = NULL;
char *key = NULL;
int val;
int ret = -1;
if (!(sysfs_path = virGetUnprivSGIOSysfsPath(device_path, NULL)))
goto cleanup;
/* It can't be conflict if unpriv_sgio is not supported by kernel. */
if (!virFileExists(sysfs_path)) {
ret = 0;
goto cleanup;
}
if (!(key = qemuGetSharedDeviceKey(device_path)))
goto cleanup;
/* It can't be conflict if no other domain is sharing it. */
if (!(virHashLookup(sharedDevices, key))) {
ret = 0;
goto cleanup;
}
if (virGetDeviceUnprivSGIO(device_path, NULL, &val) < 0)
goto cleanup;
/* Error message on failure needs to be handled in caller
* since there is more specific knowledge of device
*/
if (!((val == 0 &&
(sgio == VIR_DOMAIN_DEVICE_SGIO_FILTERED ||
sgio == VIR_DOMAIN_DEVICE_SGIO_DEFAULT)) ||
(val == 1 &&
sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED))) {
ret = -2;
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(sysfs_path);
VIR_FREE(key);
return ret;
}
/* Check if a shared device's setting conflicts with the conf
* used by other domain(s). Currently only checks the sgio
* setting. Note that this should only be called for disk with
* block source if the device type is disk.
*
* Returns 0 if no conflicts, otherwise returns -1.
*/
static int
qemuCheckSharedDevice(virHashTablePtr sharedDevices,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk = NULL;
char *sysfs_path = NULL;
char *key = NULL;
int val;
int ret = 0;
if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
disk = dev->data.disk;
/* The only conflicts between shared disk we care about now
* is sgio setting, which is only valid for device='lun'.
*/
if (disk->device != VIR_DOMAIN_DISK_DEVICE_LUN)
return 0;
} else {
return 0;
}
if (!(sysfs_path = virGetUnprivSGIOSysfsPath(disk->src, NULL))) {
ret = -1;
goto cleanup;
}
/* It can't be conflict if unpriv_sgio is not supported
* by kernel.
*/
if (!virFileExists(sysfs_path))
goto cleanup;
if (!(key = qemuGetSharedDeviceKey(disk->src))) {
ret = -1;
goto cleanup;
}
/* It can't be conflict if no other domain is
* is sharing it.
*/
if (!(virHashLookup(sharedDevices, key)))
goto cleanup;
if (virGetDeviceUnprivSGIO(disk->src, NULL, &val) < 0) {
ret = -1;
goto cleanup;
}
if ((val == 0 &&
(disk->sgio == VIR_DOMAIN_DEVICE_SGIO_FILTERED ||
disk->sgio == VIR_DOMAIN_DEVICE_SGIO_DEFAULT)) ||
(val == 1 &&
disk->sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED))
goto cleanup;
if (disk->type == VIR_DOMAIN_DISK_TYPE_VOLUME) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("sgio of shared disk 'pool=%s' 'volume=%s' conflicts "
"with other active domains"),
disk->srcpool->pool,
disk->srcpool->volume);
} else {
virReportError(VIR_ERR_OPERATION_INVALID,
_("sgio of shared disk '%s' conflicts with other "
"active domains"), disk->src);
}
ret = -1;
cleanup:
VIR_FREE(sysfs_path);
VIR_FREE(key);
return ret;
}
/* Check if a shared device's setting conflicts with the conf
* used by other domain(s). Currently only checks the sgio
* setting. Note that this should only be called for disk with
* block source if the device type is disk.
*
* Returns 0 if no conflicts, otherwise returns -1.
*/
static int
qemuCheckSharedDevice(virHashTablePtr sharedDevices,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk = NULL;
virDomainHostdevDefPtr hostdev = NULL;
char *sysfs_path = NULL;
char *key = NULL;
char *hostdev_name = NULL;
char *hostdev_path = NULL;
char *device_path = NULL;
int val;
int ret = 0;
if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
disk = dev->data.disk;
/* The only conflicts between shared disk we care about now
* is sgio setting, which is only valid for device='lun'.
*/
if (disk->device != VIR_DOMAIN_DISK_DEVICE_LUN)
return 0;
device_path = disk->src;
} else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) {
hostdev = dev->data.hostdev;
if (!(hostdev_name = virSCSIDeviceGetDevName(hostdev->source.subsys.u.scsi.adapter,
hostdev->source.subsys.u.scsi.bus,
hostdev->source.subsys.u.scsi.target,
hostdev->source.subsys.u.scsi.unit)))
goto cleanup;
if (virAsprintf(&hostdev_path, "/dev/%s", hostdev_name) < 0)
goto cleanup;
device_path = hostdev_path;
} else {
return 0;
}
if (!(sysfs_path = virGetUnprivSGIOSysfsPath(device_path, NULL))) {
ret = -1;
goto cleanup;
}
/* It can't be conflict if unpriv_sgio is not supported
* by kernel.
*/
if (!virFileExists(sysfs_path))
goto cleanup;
if (!(key = qemuGetSharedDeviceKey(device_path))) {
ret = -1;
goto cleanup;
}
/* It can't be conflict if no other domain is
* is sharing it.
*/
if (!(virHashLookup(sharedDevices, key)))
goto cleanup;
if (virGetDeviceUnprivSGIO(device_path, NULL, &val) < 0) {
ret = -1;
goto cleanup;
}
if ((val == 0 &&
(disk->sgio == VIR_DOMAIN_DEVICE_SGIO_FILTERED ||
disk->sgio == VIR_DOMAIN_DEVICE_SGIO_DEFAULT)) ||
(val == 1 &&
disk->sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED))
goto cleanup;
if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
if (disk->type == VIR_DOMAIN_DISK_TYPE_VOLUME) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("sgio of shared disk 'pool=%s' 'volume=%s' conflicts "
"with other active domains"),
disk->srcpool->pool,
disk->srcpool->volume);
} else {
virReportError(VIR_ERR_OPERATION_INVALID,
_("sgio of shared disk '%s' conflicts with other "
"active domains"), disk->src);
}
} else {
virReportError(VIR_ERR_OPERATION_INVALID,
_("sgio of shared scsi host device '%s-%d-%d-%d' conflicts "
"with other active domains"),
hostdev->source.subsys.u.scsi.adapter,
hostdev->source.subsys.u.scsi.bus,
hostdev->source.subsys.u.scsi.target,
hostdev->source.subsys.u.scsi.unit);
}
ret = -1;
cleanup:
VIR_FREE(hostdev_name);
VIR_FREE(hostdev_path);
VIR_FREE(sysfs_path);
VIR_FREE(key);
return ret;
}
