quired for (1)). (5) A netfs may annotate cache objects that belongs to it. (6) Cache objects can be pinned and reservations made. (7) The interface to the netfs returns as few errors as possible, preferring rather to let the netfs remain oblivious. (8) Cookies are used to represent indices, files and other objects to the netfs. The simplest cookie is just a NULL pointer - indicating noth