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conf: simplify functions virDomainSCSIDriveAddressIsUsedBy*()

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Pass the virDomainDeviceDriveAddress as a struct instead of individual
arguments. Reworked the function descriptions.

Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Marc Hartmayer 2016-11-30 12:47:01 +01:00 committed by Michal Privoznik
parent 3b004cc72d
commit c344d4b73f
1 changed files with 48 additions and 37 deletions
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85
src/conf/domain_conf.c
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@ -4016,16 +4016,19 @@ virDomainDefPostParseGraphics(virDomainDef *def)
}
/* Check if a drive type address $controller:$bus:$target:$unit is already
* taken by a disk or not.
/**
* virDomainDriveAddressIsUsedByDisk:
* @def: domain definition containing the disks to check
* @type: bus type
* @addr: address to check for duplicates
*
* Return true if any disk is already using the given address on the
* given bus, false otherwise.
*/
static bool
virDomainDriveAddressIsUsedByDisk(const virDomainDef *def,
virDomainDiskBus type,
unsigned int controller,
unsigned int bus,
unsigned int target,
unsigned int unit)
const virDomainDeviceDriveAddress *addr)
{
virDomainDiskDefPtr disk;
size_t i;
@ -4037,10 +4040,10 @@ virDomainDriveAddressIsUsedByDisk(const virDomainDef *def,
disk->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DRIVE)
continue;
if (disk->info.addr.drive.controller == controller &&
disk->info.addr.drive.unit == unit &&
disk->info.addr.drive.bus == bus &&
disk->info.addr.drive.target == target)
if (disk->info.addr.drive.controller == addr->controller &&
disk->info.addr.drive.unit == addr->unit &&
disk->info.addr.drive.bus == addr->bus &&
disk->info.addr.drive.target == addr->target)
return true;
}
@ -4048,16 +4051,19 @@ virDomainDriveAddressIsUsedByDisk(const virDomainDef *def,
}
/* Check if a drive type address $controller:$target:$bus:$unit is already
* taken by a host device or not.
/**
* virDomainDriveAddressIsUsedByHostdev:
* @def: domain definition containing the hostdevs to check
* @type: bus type
* @addr: address to check for duplicates
*
* Return true if any hostdev is already using the given address on the
* given bus, false otherwise.
*/
static bool
virDomainDriveAddressIsUsedByHostdev(const virDomainDef *def,
virDomainHostdevSubsysType type,
unsigned int controller,
unsigned int bus,
unsigned int target,
unsigned int unit)
const virDomainDeviceDriveAddress *addr)
{
virDomainHostdevDefPtr hostdev;
size_t i;
@ -4069,10 +4075,10 @@ virDomainDriveAddressIsUsedByHostdev(const virDomainDef *def,
hostdev->info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DRIVE)
continue;
if (hostdev->info->addr.drive.controller == controller &&
hostdev->info->addr.drive.unit == unit &&
hostdev->info->addr.drive.bus == bus &&
hostdev->info->addr.drive.target == target)
if (hostdev->info->addr.drive.controller == addr->controller &&
hostdev->info->addr.drive.unit == addr->unit &&
hostdev->info->addr.drive.bus == addr->bus &&
hostdev->info->addr.drive.target == addr->target)
return true;
}
@ -4080,24 +4086,29 @@ virDomainDriveAddressIsUsedByHostdev(const virDomainDef *def,
}
/**
* virDomainSCSIDriveAddressIsUsed:
* @def: domain definition to check against
* @addr: address to check for duplicates
*
* Return true if the SCSI drive address is already in use, false
* otherwise.
*/
static bool
virDomainSCSIDriveAddressIsUsed(const virDomainDef *def,
unsigned int controller,
unsigned int bus,
unsigned int target,
unsigned int unit)
const virDomainDeviceDriveAddress *addr)
{
/* In current implementation, the maximum unit number of a controller
* is either 16 or 7 (narrow SCSI bus), and if the maximum unit number
* is 16, the controller itself is on unit 7 */
if (unit == 7)
if (addr->unit == 7)
return true;
if (virDomainDriveAddressIsUsedByDisk(def, VIR_DOMAIN_DISK_BUS_SCSI,
controller, bus, target, unit) ||
addr) ||
virDomainDriveAddressIsUsedByHostdev(def,
VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI,
controller, bus, target, unit))
addr))
return true;
return false;
@ -4114,7 +4125,9 @@ virDomainControllerSCSINextUnit(const virDomainDef *def,
for (i = 0; i < max_unit; i++) {
/* Default to assigning addresses using bus = target = 0 */
if (!virDomainSCSIDriveAddressIsUsed(def, controller, 0, 0, i))
const virDomainDeviceDriveAddress addr = {controller, 0, 0, i};
if (!virDomainSCSIDriveAddressIsUsed(def, &addr))
return i;
}
@ -4270,10 +4283,7 @@ virDomainDeviceDefPostParseInternal(virDomainDeviceDefPtr dev,
virDomainDeviceDriveAddressPtr addr = &hdev->info->addr.drive;
if (virDomainDriveAddressIsUsedByDisk(def,
VIR_DOMAIN_DISK_BUS_SCSI,
addr->controller,
addr->bus,
addr->target,
addr->unit)) {
addr)) {
virReportError(VIR_ERR_XML_ERROR,
_("SCSI host address controller='%u' "
"bus='%u' target='%u' unit='%u' in "
@ -6535,6 +6545,7 @@ virDomainDiskDefAssignAddress(virDomainXMLOptionPtr xmlopt,
switch (def->bus) {
case VIR_DOMAIN_DISK_BUS_SCSI: {
virDomainDeviceDriveAddress addr = {0, 0, 0, 0};
unsigned int controller;
unsigned int unit;
@ -6559,9 +6570,12 @@ virDomainDiskDefAssignAddress(virDomainXMLOptionPtr xmlopt,
unit = idx % 7;
}
addr.controller = controller;
addr.unit = unit;
if (virDomainDriveAddressIsUsedByHostdev(vmdef,
VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI,
controller, 0, 0, unit)) {
&addr)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("using disk target name '%s' conflicts with "
"SCSI host device address controller='%u' "
@ -6570,10 +6584,7 @@ virDomainDiskDefAssignAddress(virDomainXMLOptionPtr xmlopt,
return -1;
}
def->info.addr.drive.controller = controller;
def->info.addr.drive.bus = 0;
def->info.addr.drive.target = 0;
def->info.addr.drive.unit = unit;
memcpy(&def->info.addr.drive, &addr, sizeof(addr));
break;
}