geom_vol_ffs problems

I have problems getting geom_vol_ffs to recognise one of my file
systems. I set sysctl kern.geom.debugflags=1, and then label ad0s3a
and ad0s3e:

   # cd /dev/vol
   # ls -l
   # tunefs -L 'curroot' /dev/ad0s3a
   # ls -l
   total 0
   crw-r-----  1 root  operator    4,  42 Jun  4 13:41 curroot
   # tunefs -L 'curvar' /dev/ad0s3e

The kernel messages printed after running this last command are
attached in "dmesg.ad0s3e".

   # ls -l
   total 0
   crw-r-----  1 root  operator    4,  42 Jun  4 13:41 curroot
   crw-r-----  1 root  operator    4,  43 Jun  4 13:41 curvar

So far, so good. Then I label ad0s3f:

   # tunefs -L 'curusr' /dev/ad0s3f
   # ls -l
   total 0
   crw-r-----  1 root  operator    4,  42 Jun  4 13:41 curroot
   crw-r-----  1 root  operator    4,  43 Jun  4 13:41 curvar

No /dev/vol/curusr appears. The kernel messages printed after running
this "tunefs" are attached in "dmesg.ad0s3f".

Kernel: 5.1-BETA2 (GENERIC + GEOM_BDE + GEOM_BSD + GEOM_MBR +
GEOM_VOL). Disk layout:

   # bsdlabel -r ad0s3
   # /dev/ad0s3:
   8 partitions:
   #        size   offset    fstype   [fsize bsize bps/cpg]
     a:   409600        0    4.2BSD        0     0     0
     b:   524288   409600      swap
     c:  4192965        0    unused        0     0         # "raw" part, don't edit
     e:   204800   933888    4.2BSD        0     0     0
     f:  3054277  1138688    4.2BSD        0     0     0
   # tunefs -p /dev/ad0s3e
   tunefs: ACLs: (-a)                                         disabled
   tunefs: MAC multilabel: (-l)                               disabled
   tunefs: soft updates: (-n)                                 enabled
   tunefs: maximum blocks per file in a cylinder group: (-e)  2048
   tunefs: average file size: (-f)                            16384
   tunefs: average number of files in a directory: (-s)       64
   tunefs: minimum percentage of free space: (-m)             8%
   tunefs: optimization preference: (-o)                      time
   tunefs: volume label: (-L)                                 curvar
   # tunefs -p /dev/ad0s3f
   tunefs: ACLs: (-a)                                         disabled
   tunefs: MAC multilabel: (-l)                               disabled
   tunefs: soft updates: (-n)                                 enabled
   tunefs: maximum blocks per file in a cylinder group: (-e)  2048
   tunefs: average file size: (-f)                            16384
   tunefs: average number of files in a directory: (-s)       64
   tunefs: minimum percentage of free space: (-m)             8%
   tunefs: optimization preference: (-o)                      time
   tunefs: volume label: (-L)                                 curusr
   # df /dev/ad0s3e
   Filesystem  1K-blocks     Used   Avail Capacity  Mounted on
   /dev/ad0s3e     99191      484   90772     1%
   # df /dev/ad0s3f
   Filesystem  1K-blocks     Used   Avail Capacity  Mounted on
   /dev/ad0s3f   1480337   470689  891222    35%
   # df
   Filesystem  1K-blocks     Used   Avail Capacity  Mounted on
   /dev/ad0s2a    198463   115203   67383    63%    /
   devfs               1        1       0   100%    /dev
   /dev/ad0s2e     99191     6462   84794     7%    /var
   /dev/ad0s2f   9382546  4862871 3769072    56%    /usr
   /dev/ad0s4   16458576 15268864 1189712    93%    /d
   /dev/md0       256812        4  236264     0%    /tmp

"sysctl -b kern.geom.confxml" output attached as "dmesg.confxml".

Is this an obvious pilot error on my side, or a bug in geom_vol_ffs?


-- 
Per Kristian Hove
Dept. of Mathematical Sciences
Norwegian University of Science and Technology