[PATCH 2/2] qemu: skip hardcoded hostdev migration check if QEMU can do it for us
libvirt currently will block migration for any vfio-assigned device
unless it is a network device that is associated with a virtio-net
failover device (ie. if the hostdev object has a teaming->type ==
VIR_DOMAIN_NET_TEAMING_TYPE_TRANSIENT).
In the future there will be other vfio devices that can be migrated,
so we don't want to rely on this hardcoded block. QEMU 6.0+ will
anyway inform us of any devices that will block migration (as a part
of qemuDomainGetMigrationBlockers()), so we only need to do the
hardcoded check in the case of old QEMU that can't provide that
information.
Signed-off-by: Laine Stump <laine(a)redhat.com>
---
src/qemu/qemu_migration.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 6fc5791f61..4ad5b7af39 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -1488,6 +1488,14 @@ qemuMigrationSrcIsAllowed(virQEMUDriver *driver,
_("cannot migrate domain: %s"), reasons);
return false;
}
+ } else {
+ /* checks here are for anything that doesn't need to be
+ * checked by libvirt if running QEMU that can be queried
+ * about migration blockers.
+ */
+
+ if (!qemuMigrationSrcIsAllowedHostdev(vm->def))
+ return false;
}
if (remote) {
@@ -1514,9 +1522,6 @@ qemuMigrationSrcIsAllowed(virQEMUDriver *driver,
return false;
}
- if (!qemuMigrationSrcIsAllowedHostdev(vm->def))
- return false;
-
if (vm->def->cpu) {
/* QEMU blocks migration and save with invariant TSC enabled
* unless TSC frequency is explicitly set.
--
2.35.3