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I have a big raid array at /storage, and I'd like my guest to have access to it. I added

<filesystem type='mount' accessmode='passthrough'>
      <source dir='/storage/Test'/>
      <target dir='label'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/>
</filesystem>

to my libvirt XML file, and mounted the drive inside the VM with

sudo mount label /mnt -t 9p -o trans=virtio

This works fine, but appears to be read only. If I try and write a file, this happens:

$ touch testfile
touch: setting times of 'testfile': No such file or directory

I did some googling, but the only thing I've found so far is people saying it's a permissions issue, so for reference, libvirtd is running as root, and qemu-system-x86_64 is running as nobody. /storage/Test has 777 permissions and user nobody has the ability to write to the folder (tested by running sudo -u nobody touch testfile).

Any ideas?

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