At 03/16/2011 02:38 PM, KAMEZAWA Hiroyuki Write:
> Thank you for review and feedbacks. This is v5 onto the latest git tree.
> Any comments are welcome.
> ==
>>From ef85d268a0b553cdb784a1d1916ff8cf171adace Mon Sep 17 00:00:00 2001
> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
> Date: Wed, 16 Mar 2011 11:35:41 +0900
> Subject: [PATCHv5 1/3] libivrt/qemu - support persistent modification of devices.
>
> Now, qemudDomainAttachDeviceFlags() and qemudDomainDetachDeviceFlags()
> doesn't support VIR_DOMAIN_DEVICE_MODIFY_CONFIG. By this, virsh's
> at(de)tatch-device --persistent cannot modify qemu config.
> (Xen allows it.)
>
> This patch is a base patch for adding support of devices in
> step by step manner. Following patches will add some device
> support.
>
> Changelog v4->v5:
> - fixed error codes at reporting Error.
> - fixed unlock code after calling qemuDomainObjBeginJobWithDriver()
> - fixed virDomainFindByUUID() to be virDomainFindByName()
> - fixed spelling, indent, etc..
> - removed unnecessary checks.
>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
> ---
> src/qemu/qemu_driver.c | 141 +++++++++++++++++++++++++++++++++++++++++++----
> 1 files changed, 129 insertions(+), 12 deletions(-)
>
> diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
> index dac2bf2..dbd5bd3 100644
> --- a/src/qemu/qemu_driver.c
> +++ b/src/qemu/qemu_driver.c
> @@ -4130,16 +4130,129 @@ cleanup:
> return ret;
> }
>
> -static int qemudDomainAttachDeviceFlags(virDomainPtr dom,
> +/*
> + * Attach a device given by XML, the change will be persistent
> + * and domain XML definition file is updated.
> + */
> +static int qemuDomainAttachDevicePersistent(virDomainDefPtr vmdef,
> + virDomainDeviceDefPtr newdev)
> +{
> +
> + switch(newdev->type) {
> + default:
> + qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> + _("Sorry, the device is not supported for now"));
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int qemuDomainDetachDevicePersistent(virDomainDefPtr vmdef,
> + virDomainDeviceDefPtr device)
> +{
> + switch(device->type) {
> + default:
> + qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> + _("Sorry, the device is not supported for now"));
> + return -1;
> + }
> + return 0;
> +}
> +
> +static int qemuDomainModifyDevicePersistent(virDomainPtr dom,
> const char *xml,
Indentation is not consistent.
> - unsigned int flags) {
> - if (flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG) {
> - qemuReportError(VIR_ERR_OPERATION_INVALID,
> - "%s", _("cannot modify the persistent configuration of a domain"));
> + unsigned int attach, unsigned int flags)
> +{
> + struct qemud_driver *driver;
> + virDomainDeviceDefPtr device;
> + virDomainDefPtr vmdef;
> + virDomainObjPtr vm;
> + int ret = -1;
> +
> + if (!xml) {
> + qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("internal error"));
> return -1;
> }
xml can not be null, because remoteDomainAttachDevice()/remoteDomainAttachDeviceFlags() will fail
on client when xml is null.
> + /*
> + * When both of MODIFY_CONFIG and MODIFY_LIVE is specified at the same time,
> + * return error for now. We should support this later.
> + */
> + if (flags & VIR_DOMAIN_DEVICE_MODIFY_LIVE) {
> + qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
> + _("Now, cannot modify alive domain and its definition "
> + "at the same time."));
> + return -1;
> + }
> +
> + driver = dom->conn->privateData;
> + qemuDriverLock(driver);
> + vm = virDomainFindByName(&driver->domains, dom->name);
> + if (!vm) {
> + qemuReportError(VIR_ERR_NO_DOMAIN, _("no domain with name : '%s'"),
> + dom->name);
> + goto unlock_out;
> + }
> +
> + if (qemuDomainObjBeginJobWithDriver(driver, vm) < 0)
> + goto unlock_out;
> +
> + if (virDomainObjIsActive(vm)) {
> + /*
> + * For now, just allow updating inactive domains. Further development
> + * will allow updating both active domain and its config file at
> + * the same time.
> + */
> + qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
> + _("Now, it's unsupported to update active domain's definition."));
Indentation is not consistent.
> + goto endjob;
> + }
> +
> + vmdef = virDomainObjGetPersistentDef(driver->caps, vm);
> +
> + if (!vmdef)
> + goto endjob;
> +
> + device = virDomainDeviceDefParse(driver->caps,
> + vmdef, xml, VIR_DOMAIN_XML_INACTIVE);
Indentation is not consistent.
> + if (!device)
> + goto endjob;
> +
> + if (attach)
> + ret = qemuDomainAttachDevicePersistent(vmdef, device);
> + else
> + ret = qemuDomainDetachDevicePersistent(vmdef, device);
> +
> + if (!ret) /* save the result */
> + ret = virDomainSaveConfig(driver->configDir, vmdef);
> +
> + virDomainDeviceDefFree(device);
> +
> +endjob:
> + if (qemuDomainObjEndJob(vm) == 0)
> + vm = NULL;
> +unlock_out:
> + if (vm)
> + virDomainObjUnlock(vm);
> + qemuDriverUnlock(driver);
> + return ret;
> +}
> +
> +static int qemudDomainAttachDeviceFlags(virDomainPtr dom,
> + const char *xml,
> + unsigned int flags)
> +{
> + if (flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG)
> + return qemuDomainModifyDevicePersistent(dom, xml, 1, flags);
> +
> + if (flags & VIR_DOMAIN_DEVICE_MODIFY_LIVE)
> + return qemudDomainAttachDevice(dom, xml);
> +
> + qemuReportError(VIR_ERR_INVALID_ARG,
> + _("bad flag: %x only MODIFY_LIVE, MODIFY_CONFIG are supported now"),
Indentation is not consistent.
> + flags);
>
> - return qemudDomainAttachDevice(dom, xml);
> + return -1;
> }
>
>
> @@ -4354,13 +4467,17 @@ cleanup:
> static int qemudDomainDetachDeviceFlags(virDomainPtr dom,
> const char *xml,
> unsigned int flags) {
> - if (flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG) {
> - qemuReportError(VIR_ERR_OPERATION_INVALID,
> - "%s", _("cannot modify the persistent configuration of a domain"));
> - return -1;
> - }
>
> - return qemudDomainDetachDevice(dom, xml);
> + if (flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG)
> + return qemuDomainModifyDevicePersistent(dom, xml, 0, flags);
> +
> + if (flags & VIR_DOMAIN_DEVICE_MODIFY_LIVE)
> + return qemudDomainDetachDevice(dom, xml);
> +
> + qemuReportError(VIR_ERR_INVALID_ARG,
> + _("bad flag: %x only MODIFY_LIVE, MODIFY_CONFIG are supported now"),
Indentation is not consistent.
> + flags);
> + return -1;
> }
>
> static int qemudDomainGetAutostart(virDomainPtr dom,
--
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