[libvirt] [PATCH 7/8] qemu: Prepare basic APIs to handle invalid defs

[Martin Kletzander]

In order for the user to be able to fix broken domains function
qemuDomainGetXMLDesc() needs to be able to lookup invalid domain
definitions and handle them properly.  When redefined, function
qemuDomainDefineXMLFlags() must clear the 'invalid XML' reason.  As a
nice addition, qemuDomainGetState() can lookup such domains without any
other change and that allows virsh not only to get their status, but
also to list them.

Signed-off-by: Martin Kletzander <mkletzan at redhat.com>
---
 src/qemu/qemu_driver.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index ec369719799e..0832c8505417 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -2711,7 +2711,7 @@ qemuDomainGetState(virDomainPtr dom,

     virCheckFlags(0, -1);

-    if (!(vm = qemuDomObjFromDomain(dom)))
+    if (!(vm = qemuDomObjFromDomainInvalid(dom)))
         goto cleanup;

     if (virDomainGetStateEnsureACL(dom->conn, vm->def) < 0)
@@ -7086,19 +7086,23 @@ qemuDomainGetXMLDesc(virDomainPtr dom,

     /* Flags checked by virDomainDefFormat */

-    if (!(vm = qemuDomObjFromDomain(dom)))
+    if (!(vm = qemuDomObjFromDomainInvalid(dom)))
         goto cleanup;

     if (virDomainGetXMLDescEnsureACL(dom->conn, vm->def, flags) < 0)
         goto cleanup;

-    if (qemuDomainUpdateCurrentMemorySize(driver, vm) < 0)
-        goto cleanup;
+    if (vm->def->parseError) {
+        ignore_value(VIR_STRDUP(ret, vm->def->xmlStr));
+    } else {
+        if (qemuDomainUpdateCurrentMemorySize(driver, vm) < 0)
+            goto cleanup;

-    if ((flags & VIR_DOMAIN_XML_MIGRATABLE))
-        flags |= QEMU_DOMAIN_FORMAT_LIVE_FLAGS;
+        if ((flags & VIR_DOMAIN_XML_MIGRATABLE))
+            flags |= QEMU_DOMAIN_FORMAT_LIVE_FLAGS;

-    ret = qemuDomainFormatXML(driver, vm, flags);
+        ret = qemuDomainFormatXML(driver, vm, flags);
+    }

  cleanup:
     virDomainObjEndAPI(&vm);
@@ -7566,6 +7570,9 @@ qemuDomainDefineXMLFlags(virConnectPtr conn,
         goto cleanup;
     }

+    if (oldDef && oldDef->parseError)
+        virDomainObjSetState(vm, virDomainObjGetState(vm, NULL), 0);
+
     event = virDomainEventLifecycleNewFromObj(vm,
                                      VIR_DOMAIN_EVENT_DEFINED,
                                      !oldDef ?
-- 
2.6.3