From e89b42ccc6f28ff7c4f9a65060c4d0320ff5ac56 Mon Sep 17 00:00:00 2001
From: Michal Privoznik <mprivozn@redhat.com>
Date: Tue, 22 Sep 2015 16:52:03 +0200
Subject: [PATCH] virDomainCreateXML: Don't remove persistent domains on error

https://bugzilla.redhat.com/show_bug.cgi?id=871452

Okay, so we allow users to 'virsh create' an already existing
domain, providing completely different XML than the one stored in
Libvirt. Well, as long as name and UUID matches. However, in some
drivers the code that handles errors unconditionally removes the
domain that failed to start even though the domain might have
been persistent. Fortunately, the domain is removed just from the
internal list of domains and the config file is kept around.

Steps to reproduce:

1) virsh dumpxml $dom > /tmp/dom.xml
2) change XML so that it is still parse-able but won't boot, e.g.
change guest agent path to /foo/bar
3) virsh create /tmp/dom.xml
4) virsh dumpxml $dom
5) Observe "No such domain" error

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
(cherry picked from commit 37405b910907bd1ad338fb0d6a967bfd23529cf6)
---
 src/lxc/lxc_driver.c       | 6 ++++--
 src/qemu/qemu_driver.c     | 6 ++++--
 src/test/test_driver.c     | 7 ++++++-
 src/uml/uml_driver.c       | 7 ++++---
 src/vmware/vmware_driver.c | 6 ++++--
 5 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 4d44881731..a08946b0ff 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -1239,8 +1239,10 @@ lxcDomainCreateXMLWithFiles(virConnectPtr conn,
                            (flags & VIR_DOMAIN_START_AUTODESTROY),
                            VIR_DOMAIN_RUNNING_BOOTED) < 0) {
         virDomainAuditStart(vm, "booted", false);
-        virDomainObjListRemove(driver->domains, vm);
-        vm = NULL;
+        if (!vm->persistent) {
+            virDomainObjListRemove(driver->domains, vm);
+            vm = NULL;
+        }
         goto cleanup;
     }
 
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index fda9cd917d..a0aee8f173 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -1751,7 +1751,8 @@ static virDomainPtr qemuDomainCreateXML(virConnectPtr conn,
     def = NULL;
 
     if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0) {
-        qemuDomainRemoveInactive(driver, vm);
+        if (!vm->persistent)
+            qemuDomainRemoveInactive(driver, vm);
         goto cleanup;
     }
 
@@ -1761,7 +1762,8 @@ static virDomainPtr qemuDomainCreateXML(virConnectPtr conn,
                          start_flags) < 0) {
         virDomainAuditStart(vm, "booted", false);
         qemuDomainObjEndJob(driver, vm);
-        qemuDomainRemoveInactive(driver, vm);
+        if (!vm->persistent)
+            qemuDomainRemoveInactive(driver, vm);
         goto cleanup;
     }
 
diff --git a/src/test/test_driver.c b/src/test/test_driver.c
index 90ab09f723..3809f72b9b 100644
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -1621,8 +1621,13 @@ testDomainCreateXML(virConnectPtr conn, const char *xml,
         goto cleanup;
     def = NULL;
 
-    if (testDomainStartState(privconn, dom, VIR_DOMAIN_RUNNING_BOOTED) < 0)
+    if (testDomainStartState(privconn, dom, VIR_DOMAIN_RUNNING_BOOTED) < 0) {
+        if (!dom->persistent) {
+            virDomainObjListRemove(privconn->domains, dom);
+            dom = NULL;
+        }
         goto cleanup;
+    }
 
     event = virDomainEventLifecycleNewFromObj(dom,
                                      VIR_DOMAIN_EVENT_STARTED,
diff --git a/src/uml/uml_driver.c b/src/uml/uml_driver.c
index c3c5fa7d9a..337b792250 100644
--- a/src/uml/uml_driver.c
+++ b/src/uml/uml_driver.c
@@ -1623,9 +1623,10 @@ static virDomainPtr umlDomainCreateXML(virConnectPtr conn, const char *xml,
     if (umlStartVMDaemon(conn, driver, vm,
                          (flags & VIR_DOMAIN_START_AUTODESTROY)) < 0) {
         virDomainAuditStart(vm, "booted", false);
-        virDomainObjListRemove(driver->domains,
-                               vm);
-        vm = NULL;
+        if (!vm->persistent) {
+            virDomainObjListRemove(driver->domains, vm);
+            vm = NULL;
+        }
         goto cleanup;
     }
     virDomainAuditStart(vm, "booted", true);
diff --git a/src/vmware/vmware_driver.c b/src/vmware/vmware_driver.c
index ec74fe3831..ce50d789db 100644
--- a/src/vmware/vmware_driver.c
+++ b/src/vmware/vmware_driver.c
@@ -710,8 +710,10 @@ vmwareDomainCreateXML(virConnectPtr conn, const char *xml,
     vmdef = NULL;
 
     if (vmwareStartVM(driver, vm) < 0) {
-        virDomainObjListRemove(driver->domains, vm);
-        vm = NULL;
+        if (!vm->persistent) {
+            virDomainObjListRemove(driver->domains, vm);
+            vm = NULL;
+        }
         goto cleanup;
     }
 
-- 
2.47.2