[VirtioFS Support Page]

Having a weird issue with my Ubuntu 22.04 VM with virtiofs I wasn't seeing when I was using cifs shares prior, not sure if I just have something set slightly wrong?

So far, I'm only seeing the issue with yt-dlp, when it tries to write a file, it will error out, sometimes part way through the file, sometimes after the file has finished, sometimes it won't even start a file.

 

From my linux side:

ubuntuServer:/downloads/temp$ yt-dlp --version
2022.10.04

ubuntuServer:/downloads/temp$ uname -a
Linux gringott 5.15.0-52-generic #58-Ubuntu SMP Thu Oct 13 08:03:55 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

ubuntuServer:/downloads/temp$ lsb_release -r
Release:        22.04

ubuntuServer:/downloads/temp$ cat /etc/fstab
downloads /downloads virtiofs rw,relatime 0 0

ubuntuServer:/downloads$ ls -alh
drwxrwxrwx  1   99 users  290 Oct 31 13:53 temp

ubuntuServer:/downloads/temp$ yt-dlp "https://www.youtube.com/watch?v=2CbObOuOEuA"
[youtube] 2CbObOuOEuA: Downloading webpage
[youtube] 2CbObOuOEuA: Downloading android player API JSON
[info] 2CbObOuOEuA: Downloading 1 format(s): 313+251
[download] Destination: How to set up Unraid - 2021 Guide [2CbObOuOEuA].f313.webm
[download] 100.0% of  167.95MiB at   46.43MiB/s ETA 00:00ERROR: unable to download video data: [Errno 95] Operation not supported

ubuntuServer:/downloads/temp$ yt-dlp "https://www.youtube.com/watch?v=2CbObOuOEuA"
[youtube] 2CbObOuOEuA: Downloading webpage
[youtube] 2CbObOuOEuA: Downloading android player API JSON
[info] 2CbObOuOEuA: Downloading 1 format(s): 313+251
[download] Resuming download at byte 176106778
[download] How to set up Unraid - 2021 Guide [2CbObOuOEuA].f313.webm has already been downloaded
[download] 100% of  167.95MiB
[download] Destination: How to set up Unraid - 2021 Guide [2CbObOuOEuA].f251.webm
[download] 100.0% of   12.66MiB at   31.19MiB/s ETA 00:00ERROR: unable to download video data: [Errno 95] Operation not supported

ubuntuServer:/downloads/temp$ yt-dlp "https://www.youtube.com/watch?v=2CbObOuOEuA"
[youtube] 2CbObOuOEuA: Downloading webpage
[youtube] 2CbObOuOEuA: Downloading android player API JSON
[info] 2CbObOuOEuA: Downloading 1 format(s): 313+251
[download] How to set up Unraid - 2021 Guide [2CbObOuOEuA].f313.webm has already been downloaded
[download] 100% of  167.95MiB
[download] Resuming download at byte 13270660
[download] How to set up Unraid - 2021 Guide [2CbObOuOEuA].f251.webm has already been downloaded
[download] 100% of   12.66MiB
[Merger] Merging formats into "How to set up Unraid - 2021 Guide [2CbObOuOEuA].webm"
Deleting original file How to set up Unraid - 2021 Guide [2CbObOuOEuA].f313.webm (pass -k to keep)
Deleting original file How to set up Unraid - 2021 Guide [2CbObOuOEuA].f251.webm (pass -k to keep)

 

From my VM Config:
 

  <memoryBacking>
    <nosharepages/>
    <source type='memfd'/>
    <access mode='shared'/>
  </memoryBacking>

    <filesystem type='mount' accessmode='passthrough'>
      <driver type='virtiofs' queue='1024'/>
      <binary path='/usr/libexec/virtiofsd' xattr='on'>
        <cache mode='always'/>
        <sandbox mode='chroot'/>
        <lock posix='on' flock='on'/>
      </binary>
      <source dir='/mnt/user/downloads/'/>
      <target dir='downloads'/>
      <alias name='fs1'/>
      <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
    </filesystem>

 

If I umount /downloads, and remount it using the cifs share, the Errno 95 goes away. Any ideas what I may have done wrong?