Steps to reproduce this bug: 1. virsh attach-disk domain --source imagefile --target sdb --sourcetype file --driver qemu --subdriver raw 2. virsh detach-device controller.xml # remove scsi controller 0 3. virsh detach-disk domain sdb error: Failed to detach disk error: operation failed: detaching scsi0-0-1 device failed: Device 'scsi0-0-1' not found I think we should not detach a controller when it is used by some other device. Signed-off-by: Wen Congyang <wency(a)cn.fujitsu.com&gt; --- src/qemu/qemu_hotplug.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 56 insertions(+), 0 deletions(-) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index fb9db5a..2c8bc3b 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -1297,6 +1297,56 @@ cleanup: return ret; } +static bool qemuDomainDiskControllerIsBusy(virDomainObjPtr vm, + virDomainControllerDefPtr detach) +{ + int i; + virDomainDiskDefPtr disk; + + for (i = 0; i < vm->def->ndisks; i++) { + disk = vm->def->disks[i]; + if (disk->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DRIVE) + /* the disk does not use disk controller */ + continue; + + /* check whether the disk uses this type controller */ + if (disk->bus == VIR_DOMAIN_DISK_BUS_IDE && + detach->type != VIR_DOMAIN_CONTROLLER_TYPE_IDE) + continue; + if (disk->bus == VIR_DOMAIN_DISK_BUS_FDC && + detach->type != VIR_DOMAIN_CONTROLLER_TYPE_FDC) + continue; + if (disk->bus == VIR_DOMAIN_DISK_BUS_SCSI && + detach->type != VIR_DOMAIN_CONTROLLER_TYPE_SCSI) + continue; + + if (disk->info.addr.drive.controller == detach->idx) + return true; + } + + return false; +} + +static bool qemuDomainControllerIsBusy(virDomainObjPtr vm, + virDomainControllerDefPtr detach) +{ + switch (detach->type) { + case VIR_DOMAIN_CONTROLLER_TYPE_IDE: + case VIR_DOMAIN_CONTROLLER_TYPE_FDC: + case VIR_DOMAIN_CONTROLLER_TYPE_SCSI: + return qemuDomainDiskControllerIsBusy(vm, detach); + + case VIR_DOMAIN_CONTROLLER_TYPE_SATA: + case VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL: + case VIR_DOMAIN_CONTROLLER_TYPE_CCID: + default: + /* libvirt does not support sata controller, and does not support to + * detach virtio and smart card controller. + */ + return true; + } +} + int qemuDomainDetachPciControllerDevice(struct qemud_driver *driver, virDomainObjPtr vm, virDomainDeviceDefPtr dev, @@ -1329,6 +1379,12 @@ int qemuDomainDetachPciControllerDevice(struct qemud_driver *driver, goto cleanup; } + if (qemuDomainControllerIsBusy(vm, detach)) { + qemuReportError(VIR_ERR_OPERATION_FAILED, "%s", + _("device cannot be detached: device is busy")); + goto cleanup; + } + if (qemuCmdFlags & QEMUD_CMD_FLAG_DEVICE) { if (qemuAssignDeviceControllerAlias(detach) < 0) goto cleanup; -- 1.7.1