This is v7. Dropped patches for Nics and added 2 sanity checks and
show correct error messages.
=
>From 948597237bd9ecfc5c7343fd30efdca37733274e Mon Sep 17 00:00:00 2001
From: KAMEZAWA Hiroyuki <kamezawa.hir...@jp.fujitsu.com>
Date: Fri, 25 Mar 2011 16:59:55 +0900
Subject: [PATCHv7 1/4] libvirt/qemu - 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.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hir...@jp.fujitsu.com>
---
src/qemu/qemu_driver.c | 138 +++++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 125 insertions(+), 13 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index af897ad..a4fb1cd 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -4144,16 +4144,125 @@ cleanup:
return ret;
}
-static int qemudDomainAttachDeviceFlags(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"));
+/*
+ * 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,
+ unsigned int attach,
+ unsigned int flags)
+{
+ struct qemud_driver *driver;
+ virDomainDeviceDefPtr device;
+ virDomainDefPtr vmdef;
+ virDomainObjPtr vm;
+ int ret = -1;
+
+ /*
+ * 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",
+ _("unsupported to update active domain's
definition."));
+ goto endjob;
+ }
+
+ vmdef = virDomainObjGetPersistentDef(driver->caps, vm);
- return qemudDomainAttachDevice(dom, xml);
+ if (!vmdef)
+ goto endjob;
+
+ device = virDomainDeviceDefParse(driver->caps,
+ vmdef, xml, VIR_DOMAIN_XML_INACTIVE);
+ 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 not supported"), flags);
+
+ return -1;
}
@@ -4368,13 +4477,16 @@ 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 not supported now"), flags);
+ return -1;
}
static int qemudDomainGetAutostart(virDomainPtr dom,
--
1.7.4.1
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