Hi,

 

My current setup:

Unraid 6.12.3 installed on an Asustor NAS.

3 "volumes" (the array with a single 3Tb HDD, a "small" 500gb ZFS mirror and a "big" 2tb ZFS mirror). A few Windows smb clients and an Ubuntu 22.04 server.

 

The shares are exported with the "default" options. There is only a primary storage (secondary  = none for ALL "volumes" event for the array).

# exportfs -v | grep cub

/mnt/user/cub-data 192.168.1.11(async,wdelay,hide,no_subtree_check,fsid=102,sec=sys,rw,secure,no_root_squash,no_all_squash)

 

On client side, the mount looks like this:

# grep cub-data /etc/fstab

asus:/mnt/user/cub-data         /asus/cub-data          nfs     rw      0       0

# mount -v | grep cub-data

asus:/mnt/user/cub-data on /asus/cub-data type nfs4 (rw,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.11,local_lock=none,addr=192.168.1.14)

 

In dmesg on the server I got one instance of (I don't think it's related):

[  962.833521] nfsd: non-standard errno: -38
[  962.833541] WARNING: CPU: 3 PID: 8235 at fs/nfsd/nfsproc.c:909 nfserrno+0x45/0x51 [nfsd]

 

If I stop the array, I get  the following on client:

root@cub:/asus# cd /asus/cub-data
-bash: cd: /asus/cub-data: Permission denied

 

in dmesg:

[ 1491.418450] NFS: state manager: check lease failed on NFSv4 server asus with error 13
[ 1492.438333] NFS: state manager: check lease failed on NFSv4 server asus with error 13

 

When I restart the array (of I restart the unraid server), I get the following on client:

root@cub:/asus/cub-data# cd /asus/cub-data
root@cub:/asus/cub-data# ls
ls: cannot open directory '.': Stale file handle

 

#dmesg

[ 1883.562037] NFS: server asus error: fileid changed
               fsid 0:58: expected fileid 0x34000000000022, got 0x3a000000000022

 

But If I change to a subdirectory of the shared folder, it works:

# cd /asus/cub-data/dokuwiki

# ls

docker-compose.yml  dokuwiki_data  (files in the directory...)

 

I can correct the issue with 

mount /asus/cub-data ; umount /asus/cub-data

 

So I guess the issue is that the /mnt/user/cub-data directory on the server is a FUSE "directory". But how is it possible that I'm the only one with this issue ? What am I doing wrong ?

Is there a way to force an exclusive share so that it is possible to bypass shfs ? I saw the note in the release notes of 6.12.0 about NFS & exclusive shares.

asus-diagnostics-20230813-2359.zip

So I had to use a custom NFS export to solve this.

I export directly the /mnt/DiskName/share so I skip all the issues with /mnt/user