OpenSolaris

The lofi(7d) driver is just a little bit to hard to use.

In particular we need to extend Solaris so that the following "just work":

# mount -F hsfs /path/to/mydvd.iso /mnt

This might require expanding a little bit so that it is more like this:

# mount -F lofi -o ro,fs=hsfs /path/to/mydvd.iso /mnt

This also implies that we need the ability to run umount and have the
lofi mapping go away as well - if it was created by running mount but
not if it wasn't created by a call to mount.

Simiarly we need the ability to have peristent mappings of
files to lofi device names so that we can name lofi devices in /etc/vfstab
in one, or both, of the following formats:

/dev/lofi/1	/dev/rlofi/1	/mydvd	ufs	1	yes	rw

/path/to/mydvd.iso	-	/mydvd	lofi	-	yes	ro,type=hsfs

The fbk driver (ftp://ftp.berlios.de/pub/schily/kernel/fbk) can already
do this but lofi(7d) is the one that is in Solaris and it should
learn how to do this.

The peristance mapping can probably be done in a new SMF service:
svc:/system/device/lofi:default.  Getting the correct SMF dependency
tree setup could be tricky and might require the use of more than
one SMF service since we might need svc:/system/filesyem/local:default
on line to get access to the files yet we might also want the lofi
mounts to happen before svc:/system/device/local:default is marked as
online.
I'm missing the need for a vfstab entry of the first
form (/dev/lofi). Why wouldn't you always just use the 
file path directly?

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