[PATCH] nfsd as filesystem
* introduces a new filesystem - nfsd. No, it's not a typo. It's a small tree with fixed topology defined by nfsd and IO on its files does what we used to do by hand in nfsctl.c. * turns sys_nfsservctl() into a sequence of open()/write()/read()/close() It works as it used to - we don't need nfsd to be mounted anywhere, etc. * nfsd_linkage ugliness is gone. * getfs and getfh demonstrate (rather trivial) example of "descriptor as transaction descriptor" behaviour. * we are fairly close to the situation when driver-defined filesystems can be done with practically zero code overhead. We are still not there, but it's a matter of adding a couple of helpers for populating the tree. One thing we get immediately is a cleanup of sys_nfsservctl() - it got _much_ better. Moreover, we get an alternative interface that uses normal file IO and can be used without magic syscalls.
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fs/nfsctl.c
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