HAMMER and NFS?

[YONETANI Tomokazu <qhwt+dfly@xxxxxxxxxx>]

Hi.
Do you have some known limitation(or bugs) related to NFS-exporting of
HAMMER filesystem?  I've been playing with /etc/exports so as I can
upgrade my router to 2.0, and found something strange:

- can't NFS-mount an exported directory inside a HAMMER filesystem,
  only root directory can be NFS-mounted (no errors from mountd though)

- can't NFS-mount an exported pseudofs (Permission denied), or
  NFS-mount a pseudofs inside an exported HAMMER filesystem
  (again, no errors from mountd)

- I can mount it read-only, but accessing a pfs gives me `File too large'
  that is:
  # ls -l /HAMMER
  lrwxr-xr-x  1 root  wheel  10 Jul 18 12:31 obj -> @@0xffffffffffffffff:00003
  # grep /HAMMER
  /HAMMER -ro -mapall=dragonfly
  # /etc/rc.d/mountd reload (no errors on /var/log/messages)
  # mount 127.0.0.1:/HAMMER /mnt
  # ls -l /mnt
  total 0
  ls: /mnt/obj: File too large
  lrwxr-xr-x  1 root  wheel  10 Jul 18 12:31 obj

- a regular symlink takes forever to appear in the NFS-mounted directory
  even though it's accessible from that directory:
  # umount /mnt
  # mount 127.0.0.1:/HAMMER /mnt
  # mkdir /HAMMER/foo; ln -s foo /HAMMER/symlink; sync
  # ls -l /mnt
  total 0
  drwxr-xr-x  1 root  wheel   0 Jul 19 09:35 foo

  ls: /mnt/obj: File too large
  lrwxr-xr-x  1 root  wheel  10 Jul 18 12:31 obj
  # ls -l /mnt/symlink
  lrwxr-xr-x  1 root  wheel  3 Jul 19 09:36 /mnt/symlink -> foo
  # ls -dlL /mnt/symlink
  drwxr-xr-x  1 root  wheel  0 Jul 19 09:35 /mnt/symlink
  # umount /mnt
  # mount 127.0.0.1:/HAMMER /mnt
  # ls -l /mnt
  total 0
  drwxr-xr-x  1 root  wheel   0 Jul 19 09:35 foo

  ls: /mnt/obj: File too large
  lrwxr-xr-x  1 root  wheel  10 Jul 18 12:31 obj
  lrwxr-xr-x  1 root  wheel   3 Jul 19 09:36 symlink -> foo

Thanks.