[Virtio-fs] [RFC 3/5] fuse: Split fuse_mount off of fuse_conn

[Miklos Szeredi]

On Thu, May 7, 2020 at 2:08 PM Max Reitz <mreitz at redhat.com> wrote:
>
> On 07.05.20 13:24, Miklos Szeredi wrote:

> > Even better:  share the bdi between submounts.  This would make a lot
> > more sense and remove the need for loops.
>
> Hm, isn’t bdi related to the (anonymous) block device “serving” the
> super block, and thus the st_dev value?  (Which is necessarily different
> for all fuse_mounts)

BDI is normally an object bound to a block device, but a block device
can have multiple partitions, each having different st_dev values.  So
yes, a bdi *can* be shared by multiple super blocks, and this very
much makes sense in the case of fuse submounts sharing a connection.

Thanks,
Miklos