Change Details

When a NGM_MKPEER message arrives and the type is unknown, the module of the type will be loaded via kern_kldload(). When the load fails, the error from kern_kldload() is not translated and is passed to userland. That is somewhat misleading. Obviously the failing to load indicates that the type is not available, and since we have already chosen ENXIO for that purpose, we use same for consistency. While here, treat EEXIST from kern_kldload() as success in case we are in a race condition. This change will also prevent an upcoming kernel-only error EUNSDEP used by kernel linkers from being leaked to userland. MFC after: 2 weeks

Inspired by ffc72591b1f5 (Don't worry if a module is already loaded when looking ...) . MFC after: 1 week

When a NGM_MKPEER message arrives and the type is unknown, the module of the type will be loaded via kern_kldload(). When the load fails, the error from kern_kldload() is not translated and is passed to userland. That is somewhat misleading. Obviously the failing to load indicates that the type is not available,Inspired by ffc72591b1f5 (Don't worry if a module is already loaded when looking ...) and since we have already chosen ENXIO for that purpose, we use same for consistency. While here, treat EEXIST from kern_kldload() as success in case we are in a race condition. This change will also prevent an upcoming kernel-only error EUNSDEP used by kernel linkers from being leaked to userland. MFC after: 2 weeksMFC after: 1 week