9p Cache Passthrough Read Only

Hi all

 

I've recently setup the 9p passthrough to make my cache drive available to my Ubuntu 17.10 VM, however for some reason the cache drive will not allow me to create any files/folders and instead gives the following error:

 

Quote

There was an error creating the directory in /home/phillip/unRAID/cache

Operation not permitted

 

A similar 9p mount was created to map to my Media share without any such problems.

 

The following is my XML file (with the Media for reference)

    <filesystem type='mount' accessmode='passthrough'>
      <source dir='/mnt/user/Media/'/>
      <target dir='Media'/>
      <alias name='fs0'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    </filesystem>
    <filesystem type='mount' accessmode='passthrough'>
      <source dir='/mnt/cache/'/>
      <target dir='cache'/>
      <alias name='fs1'/>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
    </filesystem>

The following is my /etc/fstab:

Media	/home/phillip/unRAID/Media	9p	trans=virtio	0	0
cache	/home/phillip/unRAID/cache	9p	trans=virtio,version=9p2000.L,_netdev,rw	0	0

I have tried it both with and without the additional section (,version=9p2000.L,_netdev,rw) and it makes no difference.

 

I mount it with the following command:

sudo mount /home/phillip/unRAID/cache

I can see the files present, and even when I create a new one via PuTTY it appears in the VM.

 

I've tried the following:

 

1. Run chmod -R 0777 /mnt/cache

2. Run New Permissions against the cache drive

 

Neither have made a jot of difference.

 

Any assistance would be greatly appreciated.