From 98e92ba83b7ed01515d7243a0012f4571800027b Mon Sep 17 00:00:00 2001
From: Peter Krempa <pkrempa@redhat.com>
Date: Fri, 7 Dec 2012 12:06:30 +0100
Subject: [PATCH] qemu: snapshot: Report better error message if migration
 isn't allowed

Qemu doesn't support migration on guests with host devices. This patch
adds a check to ensure migration is safe before actually doing so.
---
 src/qemu/qemu_driver.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 93d9b69b49..9a449bfbeb 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -11430,6 +11430,10 @@ qemuDomainSnapshotCreateActiveExternal(virConnectPtr conn,
 
     /* do the memory snapshot if necessary */
     if (memory) {
+        /* check if migration is possible */
+        if (!qemuMigrationIsAllowed(driver, vm, vm->def, false))
+            goto endjob;
+
         /* allow the migration job to be cancelled or the domain to be paused */
         qemuDomainObjSetAsyncJobMask(vm, DEFAULT_JOB_MASK |
                                      JOB_MASK(QEMU_JOB_SUSPEND) |