[PATCH] qemu_migration: check for interface type 'hostdev'

[Kristina Hanicova]

When we try to migrate vm, we check if it contains only devices
that are able to migrate. If a hostdev device is not able to
migrate we raise an error with <hostdev/>, but it can actually be
<interface/>, so we need to check if hostdev device was created
by us from interface and show the right error message.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1942315

Signed-off-by: Kristina Hanicova <khanicov at redhat.com>
---
 src/qemu/qemu_migration.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 4d651aeb1a..34eee9c8b6 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -1272,9 +1272,15 @@ qemuMigrationSrcIsAllowedHostdev(const virDomainDef *def)
                 }
 
                 /* all other PCI hostdevs can't be migrated */
-                virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
-                               _("cannot migrate a domain with <hostdev mode='subsystem' type='%s'>"),
-                               virDomainHostdevSubsysTypeToString(hostdev->source.subsys.type));
+                if (hostdev->parentnet) {
+                    virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
+                                   _("cannot migrate a domain with <interface type='%s'>"),
+                                   virDomainNetTypeToString(hostdev->parentnet->type));
+                } else {
+                    virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
+                                   _("cannot migrate a domain with <hostdev mode='subsystem' type='%s'>"),
+                                   virDomainHostdevSubsysTypeToString(hostdev->source.subsys.type));
+                }
                 return false;
 
             case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
-- 
2.31.1