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qemu: Allow to attach/detach controller device persistently

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* src/conf/domain_conf.c:
  - Add virDomainControllerFind to find controller device by type
    and index.
  - Add virDomainControllerRemove to remove the controller device
    from maintained controler list.

* src/conf/domain_conf.h:
  - Declare the two new helpers.

* src/libvirt_private.syms:
  - Expose private symbols for the two new helpers.

* src/qemu/qemu_driver.c:
  - Support attach/detach controller device persistently

* src/qemu/qemu_hotplug.c:
  - Use the two helpers to simplify the codes.
This commit is contained in:
Osier Yang 2012-07-23 16:18:57 +08:00
parent 7383c1d762
commit ed1e711b99
5 changed files with 87 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
src/conf/domain_conf.c
View File

@ -7556,6 +7556,43 @@ void virDomainControllerInsertPreAlloced(virDomainDefPtr def,
def->ncontrollers++;
}
int
virDomainControllerFind(virDomainDefPtr def,
int type, int idx)
{
int i;
for (i = 0 ; i < def->ncontrollers ; i++) {
if ((def->controllers[i]->type == type) &&
(def->controllers[i]->idx == idx)) {
return i;
}
}
return -1;
}
virDomainControllerDefPtr
virDomainControllerRemove(virDomainDefPtr def, size_t i)
{
virDomainControllerDefPtr controller = def->controllers[i];
if (def->ncontrollers > 1) {
memmove(def->controllers + i,
def->controllers + i + 1,
sizeof(*def->controllers) *
(def->ncontrollers - (i + 1)));
def->ncontrollers--;
if (VIR_REALLOC_N(def->controllers, def->ncontrollers) < 0) {
/* ignore, harmless */
}
} else {
VIR_FREE(def->controllers);
def->ncontrollers = 0;
}
return controller;
}
int virDomainLeaseIndex(virDomainDefPtr def,
virDomainLeaseDefPtr lease)

3
src/conf/domain_conf.h
View File

@ -2048,7 +2048,8 @@ int virDomainControllerInsert(virDomainDefPtr def,
virDomainControllerDefPtr controller);
void virDomainControllerInsertPreAlloced(virDomainDefPtr def,
virDomainControllerDefPtr controller);
int virDomainControllerFind(virDomainDefPtr def, int type, int idx);
virDomainControllerDefPtr virDomainControllerRemove(virDomainDefPtr def, size_t i);
int virDomainLeaseIndex(virDomainDefPtr def,
virDomainLeaseDefPtr lease);

2
src/libvirt_private.syms
View File

@ -266,12 +266,14 @@ virDomainClockOffsetTypeFromString;
virDomainClockOffsetTypeToString;
virDomainConfigFile;
virDomainControllerDefFree;
virDomainControllerFind;
virDomainControllerInsert;
virDomainControllerInsertPreAlloced;
virDomainControllerModelSCSITypeFromString;
virDomainControllerModelSCSITypeToString;
virDomainControllerModelUSBTypeFromString;
virDomainControllerModelUSBTypeToString;
virDomainControllerRemove;
virDomainControllerTypeToString;
virDomainCpuPlacementModeTypeFromString;
virDomainCpuPlacementModeTypeToString;

35
src/qemu/qemu_driver.c
View File

@ -5535,6 +5535,7 @@ qemuDomainAttachDeviceConfig(virDomainDefPtr vmdef,
virDomainNetDefPtr net;
virDomainHostdevDefPtr hostdev;
virDomainLeaseDefPtr lease;
virDomainControllerDefPtr controller;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
@ -5607,6 +5608,23 @@ qemuDomainAttachDeviceConfig(virDomainDefPtr vmdef,
dev->data.lease = NULL;
break;
case VIR_DOMAIN_DEVICE_CONTROLLER:
controller = dev->data.controller;
if (virDomainControllerFind(vmdef, controller->type,
controller->idx) > 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("Target already exists"));
return -1;
}
if (virDomainControllerInsert(vmdef, controller) < 0)
return -1;
dev->data.controller = NULL;
if (qemuDomainAssignAddresses(vmdef, NULL, NULL) < 0)
return -1;
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent attach of device is not supported"));
@ -5624,6 +5642,8 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
virDomainNetDefPtr net, det_net;
virDomainHostdevDefPtr hostdev, det_hostdev;
virDomainLeaseDefPtr lease, det_lease;
virDomainControllerDefPtr cont, det_cont;
int idx;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
@ -5650,8 +5670,6 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
break;
case VIR_DOMAIN_DEVICE_HOSTDEV: {
int idx;
hostdev = dev->data.hostdev;
if ((idx = virDomainHostdevFind(vmdef, hostdev, &det_hostdev)) < 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
@ -5674,6 +5692,19 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
virDomainLeaseDefFree(det_lease);
break;
case VIR_DOMAIN_DEVICE_CONTROLLER:
cont = dev->data.controller;
if ((idx = virDomainControllerFind(vmdef, cont->type,
cont->idx)) < 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("device not present in domain configuration"));
return -1;
}
det_cont = virDomainControllerRemove(vmdef, idx);
virDomainControllerDefFree(det_cont);
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent detach of device is not supported"));

39
src/qemu/qemu_hotplug.c
View File

@ -308,22 +308,18 @@ int qemuDomainAttachPciControllerDevice(struct qemud_driver *driver,
virDomainObjPtr vm,
virDomainControllerDefPtr controller)
{
int i;
int ret = -1;
const char* type = virDomainControllerTypeToString(controller->type);
char *devstr = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
bool releaseaddr = false;
for (i = 0 ; i < vm->def->ncontrollers ; i++) {
if ((vm->def->controllers[i]->type == controller->type) &&
(vm->def->controllers[i]->idx == controller->idx)) {
if (virDomainControllerFind(vm->def, controller->type, controller->idx) > 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("target %s:%d already exists"),
type, controller->idx);
return -1;
}
}
if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE)) {
if (qemuDomainPCIAddressEnsureAddr(priv->pciaddrs, &controller->info) < 0)
@ -1875,19 +1871,13 @@ int qemuDomainDetachPciControllerDevice(struct qemud_driver *driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
int i, ret = -1;
int idx, ret = -1;
virDomainControllerDefPtr detach = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
for (i = 0 ; i < vm->def->ncontrollers ; i++) {
if ((vm->def->controllers[i]->type == dev->data.controller->type) &&
(vm->def->controllers[i]->idx == dev->data.controller->idx)) {
detach = vm->def->controllers[i];
break;
}
}
if (!detach) {
if ((idx = virDomainControllerFind(vm->def,
dev->data.controller->type,
dev->data.controller->idx)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("disk controller %s:%d not found"),
virDomainControllerTypeToString(dev->data.controller->type),
@ -1895,6 +1885,8 @@ int qemuDomainDetachPciControllerDevice(struct qemud_driver *driver,
goto cleanup;
}
detach = vm->def->controllers[idx];
if (!virDomainDeviceAddressIsValid(&detach->info,
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
@ -1935,27 +1927,14 @@ int qemuDomainDetachPciControllerDevice(struct qemud_driver *driver,
}
qemuDomainObjExitMonitorWithDriver(driver, vm);
if (vm->def->ncontrollers > 1) {
memmove(vm->def->controllers + i,
vm->def->controllers + i + 1,
sizeof(*vm->def->controllers) *
(vm->def->ncontrollers - (i + 1)));
vm->def->ncontrollers--;
if (VIR_REALLOC_N(vm->def->controllers, vm->def->ncontrollers) < 0) {
/* ignore, harmless */
}
} else {
VIR_FREE(vm->def->controllers);
vm->def->ncontrollers = 0;
}
virDomainControllerRemove(vm->def, idx);
virDomainControllerDefFree(detach);
if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE) &&
qemuDomainPCIAddressReleaseSlot(priv->pciaddrs,
detach->info.addr.pci.slot) < 0)
VIR_WARN("Unable to release PCI address on controller");
virDomainControllerDefFree(detach);
ret = 0;
cleanup: