cosmetics: bsdlabel fstype for ZFS partitions?

I've today switched the boot disk of a FreeBSD 7 system from UFS-only
to UFS (/boot) plus ZFS (for /, /usr, etc). For this I the first time
created a ZFS pool from a _partition_ instead of the usual whole slices
or disks.

In the bsdlabel(8) editing session (where I merged some of the previous
UFS partitions to a single large one for ZFS) I recognized that we do
not have a keyword for ZFS on the "fstype" column:

| #        size   offset    fstype   [fsize bsize bps/cpg]
|   a:  1048576        0    4.2BSD     2048 16384     8
|   b:  4142736  1048576      swap
|   c: 33554052        0    unused        0     0 # "raw" part, don't edit
|   d: 28362740  5191312    unused        0     0
                            ^^^^^^

I currently use "unused" here for the partition of the ZFS pool and
everything works just fine, of coure. But it looks a little bit strange
to me and this small cosmetic issue should be fixed IMHO.

So, shouldn't we define a "zfs" filesystem type in
sys/sys/disklabel.h:fstypenames plus a corresponding "#define FS_ZFS ??
/* Sun ZFS */"? If yes, what value would FS_ZFS be defined to? BTW, same
for the disk type, I think. Here a numeric value certainly was already
choosen, as Sun's GRUB is booting from ZFS disks, right?

--
rse_at_FreeBSD.org                        Ralf S. Engelschall
FreeBSD.org/~rse                       rse_at_engelschall.com
FreeBSD committer                      www.engelschall.com