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[Bug 1784919] Re: native libgfapi glusterfs support for virtio 9p filesy

From: Christian Schoenebeck
Subject: [Bug 1784919] Re: native libgfapi glusterfs support for virtio 9p filesystem passthrough
Date: Mon, 16 Nov 2020 19:50:49 -0000

There are currently no plans to implement a GlusterFS fs driver backend
for 9pfs in QEMU.

Right now the status of 9p in QEMU is "odd fixes", which means there are
currently no paid developers maintaining 9p, nor do current 9p
maintainers have sufficient time to work on it on a daily basis. New 9p
features for that reason are only likely to appear if there is an effort
for the feature coming from outside.

As xattrs are apparently not available with GlusterFS yet, you might want to 
try security_model=mapped-file with 9p as workaround instead:

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  native libgfapi  glusterfs support for virtio 9p filesystem

Status in QEMU:

Bug description:
  I can add block devices on glusterfs natively to my virtual machines since 
qemu 1.3 
  I would like to see the same feature for virtio 9p filesystems added on my 

  Accessing a filesystem mounted on the Metal is my favorite solution
  for storage that is to be shared between more than one VM. But because
  my VMs are not running as root, they are not able to passthrough
  userids and gids to gluster-fuse. uid mapping is also not possible
  because no xattr support.

  So all I can do is either setting up seperate NFS Servers to bring the
  Filesystem in via Network, or to start qemu as root or to add
  fuse_xattr on top of glusterfs_fuse. I do expect however that the
  fastest and most relieable solution is to make something like this

  -device virtio-9p-pci,fsdev=test_dev,mount_tag=test_mount



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