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Support virDomainAttachDevice and virDomainDetachDevice for disks in UML
UML supports hot plugging and unplugging of various devices. This patch exposes this functionality for disks. Signed-off-by: Soren Hansen <soren@linux2go.dk>
This commit is contained in:
Soren Hansen
Matthias Bolte
parent
efe4e210b8
commit
5c3eec9ffb
@ -1691,6 +1691,234 @@ cleanup:
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}
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static int umlDomainAttachUmlDisk(struct uml_driver *driver,
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virDomainObjPtr vm,
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virDomainDiskDefPtr disk)
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{
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int i;
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char *cmd = NULL;
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char *reply = NULL;
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for (i = 0 ; i < vm->def->ndisks ; i++) {
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if (STREQ(vm->def->disks[i]->dst, disk->dst)) {
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umlReportError(VIR_ERR_OPERATION_FAILED,
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_("target %s already exists"), disk->dst);
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return -1;
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}
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}
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if (!disk->src) {
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umlReportError(VIR_ERR_INTERNAL_ERROR,
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"%s", _("disk source path is missing"));
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goto error;
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}
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if (virAsprintf(&cmd, "config %s=%s", disk->dst, disk->src) < 0) {
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virReportOOMError();
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return -1;
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}
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if (umlMonitorCommand(driver, vm, cmd, &reply) < 0)
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goto error;
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if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks+1) < 0) {
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virReportOOMError();
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goto error;
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}
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virDomainDiskInsertPreAlloced(vm->def, disk);
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VIR_FREE(reply);
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VIR_FREE(cmd);
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return 0;
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error:
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VIR_FREE(reply);
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VIR_FREE(cmd);
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return -1;
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}
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static int umlDomainAttachDevice(virDomainPtr dom, const char *xml)
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{
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struct uml_driver *driver = dom->conn->privateData;
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virDomainObjPtr vm;
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virDomainDeviceDefPtr dev = NULL;
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int ret = -1;
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umlDriverLock(driver);
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vm = virDomainFindByUUID(&driver->domains, dom->uuid);
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if (!vm) {
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char uuidstr[VIR_UUID_STRING_BUFLEN];
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virUUIDFormat(dom->uuid, uuidstr);
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umlReportError(VIR_ERR_NO_DOMAIN,
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_("no domain with matching uuid '%s'"), uuidstr);
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goto cleanup;
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}
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if (!virDomainObjIsActive(vm)) {
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umlReportError(VIR_ERR_OPERATION_INVALID,
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"%s", _("cannot attach device on inactive domain"));
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goto cleanup;
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}
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dev = virDomainDeviceDefParse(driver->caps, vm->def, xml,
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VIR_DOMAIN_XML_INACTIVE);
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if (dev == NULL)
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goto cleanup;
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if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
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if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_UML) {
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ret = umlDomainAttachUmlDisk(driver, vm, dev->data.disk);
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if (ret == 0)
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dev->data.disk = NULL;
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} else {
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umlReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("disk bus '%s' cannot be hotplugged."),
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virDomainDiskBusTypeToString(dev->data.disk->bus));
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}
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} else {
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umlReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("device type '%s' cannot be attached"),
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virDomainDeviceTypeToString(dev->type));
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goto cleanup;
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}
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cleanup:
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virDomainDeviceDefFree(dev);
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if (vm)
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virDomainObjUnlock(vm);
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umlDriverUnlock(driver);
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return ret;
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}
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static int umlDomainAttachDeviceFlags(virDomainPtr dom,
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const char *xml,
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unsigned int flags) {
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if (flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG) {
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umlReportError(VIR_ERR_OPERATION_INVALID,
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"%s", _("cannot modify the persistent configuration of a domain"));
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return -1;
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}
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return umlDomainAttachDevice(dom, xml);
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}
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static int umlDomainDetachUmlDisk(struct uml_driver *driver,
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virDomainObjPtr vm,
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virDomainDeviceDefPtr dev)
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{
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int i, ret = -1;
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virDomainDiskDefPtr detach = NULL;
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char *cmd;
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char *reply;
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for (i = 0 ; i < vm->def->ndisks ; i++) {
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if (STREQ(vm->def->disks[i]->dst, dev->data.disk->dst)) {
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break;
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}
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}
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if (i == vm->def->ndisks) {
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umlReportError(VIR_ERR_OPERATION_FAILED,
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_("disk %s not found"), dev->data.disk->dst);
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return -1;
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}
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detach = vm->def->disks[i];
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if (virAsprintf(&cmd, "remove %s", detach->dst) < 0) {
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virReportOOMError();
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return -1;
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}
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if (umlMonitorCommand(driver, vm, cmd, &reply) < 0)
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goto cleanup;
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virDomainDiskRemove(vm->def, i);
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virDomainDiskDefFree(detach);
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ret = 0;
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VIR_FREE(reply);
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cleanup:
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VIR_FREE(cmd);
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return ret;
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}
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static int umlDomainDetachDevice(virDomainPtr dom, const char *xml) {
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struct uml_driver *driver = dom->conn->privateData;
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virDomainObjPtr vm;
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virDomainDeviceDefPtr dev = NULL;
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int ret = -1;
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umlDriverLock(driver);
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vm = virDomainFindByUUID(&driver->domains, dom->uuid);
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if (!vm) {
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char uuidstr[VIR_UUID_STRING_BUFLEN];
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virUUIDFormat(dom->uuid, uuidstr);
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umlReportError(VIR_ERR_NO_DOMAIN,
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_("no domain with matching uuid '%s'"), uuidstr);
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goto cleanup;
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}
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if (!virDomainObjIsActive(vm)) {
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umlReportError(VIR_ERR_OPERATION_INVALID,
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"%s", _("cannot detach device on inactive domain"));
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goto cleanup;
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}
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dev = virDomainDeviceDefParse(driver->caps, vm->def, xml,
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VIR_DOMAIN_XML_INACTIVE);
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if (dev == NULL)
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goto cleanup;
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if (dev->type == VIR_DOMAIN_DEVICE_DISK &&
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dev->data.disk->device == VIR_DOMAIN_DISK_DEVICE_DISK) {
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if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_UML)
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ret = umlDomainDetachUmlDisk(driver, vm, dev);
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else {
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umlReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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_("This type of disk cannot be hot unplugged"));
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}
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} else {
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umlReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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"%s", _("This type of device cannot be hot unplugged"));
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}
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cleanup:
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virDomainDeviceDefFree(dev);
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if (vm)
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virDomainObjUnlock(vm);
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umlDriverUnlock(driver);
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return ret;
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}
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static int umlDomainDetachDeviceFlags(virDomainPtr dom,
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const char *xml,
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unsigned int flags) {
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if (flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG) {
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umlReportError(VIR_ERR_OPERATION_INVALID,
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"%s", _("cannot modify the persistent configuration of a domain"));
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return -1;
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}
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return umlDomainDetachDevice(dom, xml);
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}
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static int umlDomainGetAutostart(virDomainPtr dom,
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int *autostart) {
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@ -1905,10 +2133,10 @@ static virDriver umlDriver = {
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umlDomainStartWithFlags, /* domainCreateWithFlags */
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umlDomainDefine, /* domainDefineXML */
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umlDomainUndefine, /* domainUndefine */
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NULL, /* domainAttachDevice */
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NULL, /* domainAttachDeviceFlags */
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NULL, /* domainDetachDevice */
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NULL, /* domainDetachDeviceFlags */
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umlDomainAttachDevice, /* domainAttachDevice */
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umlDomainAttachDeviceFlags, /* domainAttachDeviceFlags */
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umlDomainDetachDevice, /* domainDetachDevice */
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umlDomainDetachDeviceFlags, /* domainDetachDeviceFlags */
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NULL, /* domainUpdateDeviceFlags */
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umlDomainGetAutostart, /* domainGetAutostart */
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umlDomainSetAutostart, /* domainSetAutostart */
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