[Virtio-fs] [PATCH v3 2/3] init: allow mounting arbitrary non-blockdevice filesystems as root

[Stefan Hajnoczi]

On Wed, Jul 14, 2021 at 04:23:20PM -0400, Vivek Goyal wrote:
> From: Christoph Hellwig <hch at lst.de>
> 
> Currently the only non-blockdevice filesystems that can be used as the
> initial root filesystem are NFS and CIFS, which use the magic
> "root=/dev/nfs" and "root=/dev/cifs" syntax that requires the root
> device file system details to come from filesystem specific kernel
> command line options.
> 
> Add a little bit of new code that allows to just pass arbitrary
> string mount options to any non-blockdevice filesystems so that it can
> be mounted as the root file system.
> 
> For example a virtiofs root file system can be mounted using the
> following syntax:
> 
> "root=myfs rootfstype=virtiofs rw"
> 
> Based on an earlier patch from Vivek Goyal <vgoyal at redhat.com>.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>  init/do_mounts.c | 43 +++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)

Reviewed-by: Stefan Hajnoczi <stefanha at redhat.com>
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