From 9fcc5436d3d824ceb82b44852e1a8023c3810655 Mon Sep 17 00:00:00 2001
From: Jiri Denemark <jdenemar@redhat.com>
Date: Fri, 19 Oct 2012 13:36:33 +0200
Subject: [PATCH] qemu: Allow migration with host USB devices

Recently, patches were added support for (managed)saving, restoring, and
migrating domains with host USB devices. However, qemu driver would
still forbid migration of such domains because qemuMigrationIsAllowed
was not updated.
---
 src/qemu/qemu_migration.c | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 65cd6ec5ea..a2402ce2f4 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -800,6 +800,8 @@ qemuMigrationIsAllowed(struct qemud_driver *driver, virDomainObjPtr vm,
                        virDomainDefPtr def)
 {
     int nsnapshots;
+    bool forbid;
+    int i;
 
     if (vm) {
         if (qemuProcessAutoDestroyActive(driver, vm)) {
@@ -817,9 +819,23 @@ qemuMigrationIsAllowed(struct qemud_driver *driver, virDomainObjPtr vm,
 
         def = vm->def;
     }
-    if (def->nhostdevs > 0) {
-        virReportError(VIR_ERR_OPERATION_INVALID,
-                       "%s", _("Domain with assigned host devices cannot be migrated"));
+
+    /* Migration with USB host devices is allowed, all other devices are
+     * forbidden.
+     */
+    forbid = false;
+    for (i = 0; i < def->nhostdevs; i++) {
+        virDomainHostdevDefPtr hostdev = def->hostdevs[i];
+        if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS ||
+            hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB) {
+            forbid = true;
+            break;
+        }
+    }
+    if (forbid) {
+        virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+                       _("Domain with assigned non-USB host devices "
+                         "cannot be migrated"));
         return false;
     }
 
-- 
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