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test_driver: Support for hotplug/hotunplug of PCI devices
Add a basic support for hotplug and hotunplug of PCI <hostdev/>-s. Signed-off-by: Thanos Makatos <thanos.makatos@nutanix.com> Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Thanos Makatos
Michal Privoznik
parent
d8de4f2770
commit
cd65b895dd
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@ -41,6 +41,7 @@
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#include "domain_conf.h"
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#include "domain_driver.h"
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#include "domain_event.h"
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#include "domain_validate.h"
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#include "network_event.h"
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#include "snapshot_conf.h"
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#include "virfdstream.h"
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@ -10036,6 +10037,352 @@ testConnectGetDomainCapabilities(virConnectPtr conn G_GNUC_UNUSED,
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}
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static int
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testDomainAttachHostPCIDevice(testDriver *driver G_GNUC_UNUSED,
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virDomainObj *vm,
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virDomainHostdevDef *hostdev)
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{
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int backend = hostdev->source.subsys.u.pci.backend;
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switch (backend) {
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case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO:
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case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT:
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case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_KVM:
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break;
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case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN:
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case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_LAST:
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("test hypervisor does not support device assignment mode '%1$s'"),
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virDomainHostdevSubsysPCIBackendTypeToString(backend));
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return -1;
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}
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VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs + 1);
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vm->def->hostdevs[vm->def->nhostdevs++] = hostdev;
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return 0;
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}
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static int
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testDomainAttachHostDevice(testDriver *driver,
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virDomainObj *vm,
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virDomainHostdevDef *hostdev)
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{
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if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("hotplug is not supported for hostdev mode '%1$s'"),
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virDomainHostdevModeTypeToString(hostdev->mode));
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return -1;
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}
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if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("hotplug is not supported for hostdev subsys type '%1$s'"),
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virDomainHostdevSubsysTypeToString(hostdev->source.subsys.type));
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return -1;
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}
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return testDomainAttachHostPCIDevice(driver, vm, hostdev);
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}
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static int
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testDomainAttachDeviceLive(virDomainObj *vm,
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virDomainDeviceDef *dev,
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testDriver *driver)
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{
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const char *alias = NULL;
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if (dev->type != VIR_DOMAIN_DEVICE_HOSTDEV) {
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virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
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_("live attach of device '%1$s' is not supported"),
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virDomainDeviceTypeToString(dev->type));
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return -1;
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}
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testDomainObjCheckHostdevTaint(vm, dev->data.hostdev);
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if (testDomainAttachHostDevice(driver, vm, dev->data.hostdev) < 0)
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return -1;
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alias = dev->data.hostdev->info->alias;
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dev->data.hostdev = NULL;
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if (alias) {
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virObjectEvent *event;
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event = virDomainEventDeviceAddedNewFromObj(vm, alias);
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virObjectEventStateQueue(driver->eventState, event);
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}
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return 0;
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}
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static int
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testDomainAttachDeviceLiveAndConfig(virDomainObj *vm,
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testDriver *driver,
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const char *xml,
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unsigned int flags)
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{
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g_autoptr(virDomainDeviceDef) devConf = NULL;
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g_autoptr(virDomainDeviceDef) devLive = NULL;
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unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_INACTIVE |
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VIR_DOMAIN_DEF_PARSE_ABI_UPDATE;
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virCheckFlags(VIR_DOMAIN_AFFECT_LIVE, -1);
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if (flags & VIR_DOMAIN_AFFECT_LIVE) {
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if (!(devLive = virDomainDeviceDefParse(xml, vm->def,
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driver->xmlopt, NULL,
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parse_flags)))
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return -1;
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if (virDomainDeviceValidateAliasForHotplug(vm, devLive,
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VIR_DOMAIN_AFFECT_LIVE) < 0)
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return -1;
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if (virDomainDefCompatibleDevice(vm->def, devLive, NULL,
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VIR_DOMAIN_DEVICE_ACTION_ATTACH,
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true) < 0)
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return -1;
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if (testDomainAttachDeviceLive(vm, devLive, driver) < 0)
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return -1;
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}
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return 0;
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}
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static int
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testDomainAttachDeviceFlags(virDomainPtr domain,
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const char *xml,
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unsigned int flags)
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{
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testDriver *driver = domain->conn->privateData;
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virDomainObj *vm = NULL;
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int ret = -1;
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if (!(vm = testDomObjFromDomain(domain)))
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return -1;
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if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
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goto cleanup;
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if (testDomainAttachDeviceLiveAndConfig(vm, driver, xml, flags) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virDomainObjEndAPI(&vm);
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return ret;
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}
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static int
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testDomainAttachDevice(virDomainPtr domain, const char *xml)
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{
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return testDomainAttachDeviceFlags(domain, xml, 0);
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}
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/* search for a hostdev matching dev and detach it */
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static int
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testDomainDetachPrepHostdev(virDomainObj *vm,
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virDomainHostdevDef *match,
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virDomainHostdevDef **detach)
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{
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virDomainHostdevSubsys *subsys = &match->source.subsys;
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virDomainHostdevSubsysPCI *pcisrc = &subsys->u.pci;
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virDomainHostdevDef *hostdev = NULL;
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if (match->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("hot unplug is not supported for hostdev mode '%1$s'"),
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virDomainHostdevModeTypeToString(match->mode));
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return -1;
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}
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if (virDomainHostdevFind(vm->def, match, &hostdev) < 0) {
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if (subsys->type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) {
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g_autofree char *addrStr = virPCIDeviceAddressAsString(&pcisrc->addr);
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virReportError(VIR_ERR_DEVICE_MISSING,
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_("host pci device %1$s not found"),
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addrStr);
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} else {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("unexpected hostdev type %1$d"), subsys->type);
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}
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return -1;
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}
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*detach = hostdev;
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return 0;
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}
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static int
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testDomainRemoveHostDevice(testDriver *driver G_GNUC_UNUSED,
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virDomainObj *vm,
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virDomainHostdevDef *hostdev)
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{
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size_t i;
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VIR_DEBUG("Removing host device %s from domain %p %s",
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hostdev->info->alias, vm, vm->def->name);
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for (i = 0; i < vm->def->nhostdevs; i++) {
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if (vm->def->hostdevs[i] == hostdev) {
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virDomainHostdevRemove(vm->def, i);
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virDomainHostdevDefFree(hostdev);
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break;
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}
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}
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return 0;
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}
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static int
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testDomainRemoveDevice(testDriver *driver,
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virDomainObj *vm,
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virDomainDeviceDef *dev)
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{
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virDomainDeviceInfo *info = NULL;
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g_autofree char *alias = NULL;
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if (dev->type != VIR_DOMAIN_DEVICE_HOSTDEV) {
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virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
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_("don't know how to remove a %1$s device"),
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virDomainDeviceTypeToString(dev->type));
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return -1;
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}
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/*
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* save the alias to use when sending a DEVICE_REMOVED event after
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* all other teardown is complete
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*/
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if ((info = virDomainDeviceGetInfo(dev))) {
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alias = g_strdup(info->alias);
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}
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if (testDomainRemoveHostDevice(driver, vm, dev->data.hostdev) < 0)
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return -1;
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if (alias) {
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virObjectEvent *event;
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event = virDomainEventDeviceRemovedNewFromObj(vm, alias);
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virObjectEventStateQueue(driver->eventState, event);
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}
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return 0;
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}
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static int
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testDomainDetachDeviceLive(testDriver *driver,
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virDomainObj *vm,
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virDomainDeviceDef *match)
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{
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virDomainDeviceDef detach = { .type = match->type };
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virDomainDeviceInfo *info = NULL;
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if (match->type != VIR_DOMAIN_DEVICE_HOSTDEV) {
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virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
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_("live detach of device '%1$s' is not supported"),
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virDomainDeviceTypeToString(match->type));
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return -1;
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}
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if (testDomainDetachPrepHostdev(vm, match->data.hostdev,
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&detach.data.hostdev) < 0)
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return -1;
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/* "detach" now points to the actual device we want to detach */
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if (!(info = virDomainDeviceGetInfo(&detach))) {
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/*
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* This should never happen, since all of the device types in
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* the switch cases that end with a "break" instead of a
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* return have a virDeviceInfo in them.
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*/
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("device of type '%1$s' has no device info"),
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virDomainDeviceTypeToString(detach.type));
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return -1;
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}
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/* Make generic validation checks common to all device types */
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if (!info->alias) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Cannot detach %1$s device with no alias"),
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virDomainDeviceTypeToString(detach.type));
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return -1;
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}
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return testDomainRemoveDevice(driver, vm, &detach);
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}
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static int
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testDomainDetachDeviceAliasLiveAndConfig(testDriver *driver,
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virDomainObj *vm,
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const char *alias,
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unsigned int flags)
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{
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virDomainDef *def = NULL;
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virCheckFlags(VIR_DOMAIN_AFFECT_LIVE, -1);
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if (virDomainObjGetDefs(vm, flags, &def, NULL) < 0)
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return -1;
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if (def) {
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virDomainDeviceDef dev;
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if (virDomainDefFindDevice(def, alias, &dev, true) < 0)
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return -1;
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if (testDomainDetachDeviceLive(driver, vm, &dev) < 0)
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return -1;
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}
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return 0;
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}
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static int
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testDomainDetachDeviceAlias(virDomainPtr dom,
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const char *alias,
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unsigned int flags)
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{
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testDriver *driver = dom->conn->privateData;
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virDomainObj *vm = NULL;
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int ret = -1;
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if (!(vm = testDomObjFromDomain(dom)))
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return -1;
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if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
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goto cleanup;
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if (testDomainDetachDeviceAliasLiveAndConfig(driver, vm, alias, flags) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virDomainObjEndAPI(&vm);
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return ret;
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}
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/*
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* Test driver
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*/
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@ -10058,6 +10405,9 @@ static virHypervisorDriver testHypervisorDriver = {
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.connectListDomains = testConnectListDomains, /* 0.1.1 */
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.connectNumOfDomains = testConnectNumOfDomains, /* 0.1.1 */
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.connectListAllDomains = testConnectListAllDomains, /* 0.9.13 */
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.domainAttachDevice = testDomainAttachDevice, /* 10.0.0 */
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.domainAttachDeviceFlags = testDomainAttachDeviceFlags, /* 10.0.0 */
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.domainDetachDeviceAlias = testDomainDetachDeviceAlias, /* 10.0.0 */
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.domainCreateXML = testDomainCreateXML, /* 0.1.4 */
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.domainCreateXMLWithFiles = testDomainCreateXMLWithFiles, /* 5.7.0 */
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.domainLookupByID = testDomainLookupByID, /* 0.1.1 */
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