Re: nullfs: contents under mount point not visible via null mount

[Ilia Zykov <netbsd%izyk.ru@localhost>]

Hello!

From layer_vnops.c:

 * This makes the following assumptions:
 * - only one returned vpp
 * - no INOUT vpp's (Sun's vop_open has one of these)
 * - the vnode operation vector of the first vnode should be used
 *   to determine what implementation of the op should be invoked
 * - all mapped vnodes are of our vnode-type (NEEDSWORK:
 *   problems on rmdir'ing mount points and renaming?)
 */

Layerfs doesn't use a vnode->v_mountedhere field. 
Because it can't easy control the root vnode of mounted fs,
And maybe shouldn't.
Ilia.