J. Bruce Fields 写道:
> On Thu, Jan 07, 2010 at 04:58:28PM +0800, Bian Naimeng wrote:
>> Hi,
>>
>> I want to use this option， but i find it doesn't work at RHEL5.4GA and Fedora12.
>>
>> My /etc/exports like this:
>> # cat /etc/exports
>> /nfsroot/nfsv4 127.0.0.1(rw,nohide,fsid=0)
>> /nfsroot/nfsv4/dir1 127.0.0.1(rw,nohide,crossmnt)
>> /nfsroot/nfsv4/dir2 127.0.0.1(rw,nohide,crossmnt)
>>
>> Then:
>>
>> # mkdir /nfsroot/nfsv4/dir1/tmpdir
>> # echo "best wishes" > /nfsroot/nfsv4/dir1/file1
>> # echo "happy new year" > /nfsroot/nfsv4/dir2/file2
>>
>> # service nfs restart
>> # mount -t nfs4 127.0.0.1:/dir2 /nfsroot/nfsv4/dir1/tmpdir
>> # mount -t nfs4 127.0.0.1:/dir1 /mnt
>>
>> There is file2 at /nfsroot/nfsv4/dir1/tmpdir, but nothing at /mnt/tmpdir.
>> I'm not sure i have used it correctly, and whether it really work?
>> Thanks for your help.
>
> You can't re-export nfs filesystems.
>
> (I wonder why we aren't warning about this?)
>
Though i does not mount nfs filesystem, instead by ext3 filesystem /dev/hda,
there is not anyting at /mnt/tmpdir.
# mount /dev/hda3 /nfsroot/nfsv4/dir1/tmpdir
# mount -t nfs4 127.0.0.1:/dir1 /mnt
# ll /mnt/tmpdir/
total 0
Then, i test it at two different RHEL5.4 host.
host1（nfs server）:
# cat /etc/exports
/nfsroot/nfsv4 host2(rw,nohide,crossmnt,fsid=0)
/nfsroot/nfsv4/dir1 host2(rw,nohide,crossmnt)
# mount /dev/hda3 /nfsroot/nfsv4/dir1/tmpdir
host2 (nfs client):
# mount -t nfs4 host1:/dir1 /mnt
# ll /mnt/
ls: /nfsv4/tmpdir: Stale NFS file handle
total 4
-rw-r--r-- 1 root root 0 Jan 5 2010 file1
drwxr-xr-x 6 root root 4096 Jan 6 2010 tmpdir
# ll /nfsv4/tmpdir
ls: /nfsv4/tmpdir: Stale NFS file handle
ls: /nfsv4/tmpdir: Stale NFS file handle
Best Regards
Bian
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