Re: [PATCH 2/3] vfio/migration: Emit VFIO device migration state change QAPI event

[Peter Xu]

On Tue, May 07, 2024 at 10:47:13AM +0300, Avihai Horon wrote:
> > While at it, another trivial comment is maybe it's nice to have a helper to
> > both update the vfio migration state, plus emitting events when necessary.
> 
> I think vfio_migration_set_state() does exactly that, no?

Ah yes, looks so.  It's just that I saw some common patterns, like:

===8<===
@@ -126,11 +167,13 @@ static int vfio_migration_set_state(VFIODevice *vbasedev,
         }
 
         migration->device_state = recover_state;
+        vfio_migration_send_state_change_event(vbasedev);
 
         return ret;
     }
 
     migration->device_state = new_state;
+    vfio_migration_send_state_change_event(vbasedev);
     if (mig_state->data_fd != -1) {
         if (migration->data_fd != -1) {
             /*
@@ -157,6 +200,7 @@ reset_device:
     }
 
     migration->device_state = VFIO_DEVICE_STATE_RUNNING;
+    vfio_migration_send_state_change_event(vbasedev);
 
     return ret;
 }
===8<===

So maybe some more internal helpers?  It doesn't look like to cover all
updates to device_state, but I really didn't read into it.  Not a huge deal
really, feel free to keep it as-is if maintainers are happy.

Thanks,

-- 
Peter Xu