[systemd-devel] udev and btrfs multiple devices

[Chris Murphy]

On Thu, Jan 28, 2021 at 1:03 AM Greg KH <gregkh at linuxfoundation.org> wrote:
>
> On Wed, Jan 27, 2021 at 05:19:38PM -0700, Chris Murphy wrote:
> >
> > Next, is it possible to enhance udev so that it can report the number
> > of devices expected for a Btrfs file system? This information is
> > currently in the Btrfs superblock found on each device in the
> > num_devices field.
> > https://github.com/storaged-project/udisks/pull/838#issuecomment-768372627
>
> It's not up to udev to report that, but rather have either the kernel
> export that, or have the tool that udev calls determine that.

I mean expose in udevadm info, e.g.

E: ID_BTRFS_NUM_DEVICES=4


-- 
Chris Murphy