def get_model_perms(model):
    from django.contrib.auth.models import Permission
    app_label = model._meta.app_label
    model_name = model._meta.object_name.lower()
    qs = Permission.objects.filter(content_type__app_label=app_label,
                                   content_type__model=model_name)
    perms = ('%s.%s' % (app_label, p.codename) for p in qs.iterator())
    return set(perms)