NFS4: exports options are ignored for subdirs

[Vidar Hoel]

I am trying to set up a new NFS4 server, but it seems like the server respects options which are defined for the export _root_ directory (fsid=0), ignores deviating options that are specified for any of the exported subdirectories (i.e., the settings for the
root dir are used instead).

Example:

I followed the instructions on https://help.ubuntu.com/community/SettingUpNFSHowTo and made this example /etc/exports on the server:

/opt/exports/test 192.168.10.14/32(rw,fsid=0,insecure,no_subtree_check)
/opt/exports/test/dir1 192.168.10.14/32(rw,root_squash,insecure,no_subtree_check,async)
/opt/exports/test/dir2 192.168.10.14/32(rw,no_root_squash,insecure,no_subtree_check,async)

I mount it on the client (192.168.10.14):

# mount -t nfs4 -o proto=tcp nfsserver:/ test/
# mount -t nfs4 -o proto=tcp nfsserver:/dir1 dir1/
# mount -t nfs4 -o proto=tcp nfsserver:/dir2 dir2/

root should be able to write to test/dir2 and dir2, but:

# touch test/x test/dir1/x test/dir2/x dir1/x dir2/x
touch: cannot touch `test/x': Permission denied
touch: cannot touch `test/dir1/x': Permission denied
touch: cannot touch `test/dir2/x': Permission denied
touch: cannot touch `dir1/x': Permission denied
touch: cannot touch `dir2/x': Permission denied

If I, however, change /etc/exports on the server to:

/opt/exports/test 192.168.10.14/32(rw,fsid=0,no_root_squash,insecure,no_subtree_check)
/opt/exports/test/dir1 192.168.10.14/32(rw,root_squash,insecure,no_subtree_check,async)
/opt/exports/test/dir2 192.168.10.14/32(rw,no_root_squash,insecure,no_subtree_check,async)

and umount the dirs on the client, run "exportfs -ra" (or reboot or restart of nfs-kernel-server) and then mount the same dirs as before, I should be able to write to test, test/dir2 and dir2. However:

# touch test/x test/dir1/x test/dir2/x dir1/x dir2/x
#

The server does not respect the options for the subdirs.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: nfs-kernel-server 1:1.2.0-4ubuntu4
ProcVersionSignature: Ubuntu 2.6.32-25.45-server 2.6.32.21+drm33.7
Uname: Linux 2.6.32-25-server x86_64
Architecture: amd64
Date: Sun Oct 24 00:59:43 2010
InstallationMedia: Ubuntu-Server 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.2)
SourcePackage: nfs-utils