Re: [RFC][PATCH v2] mount.btrfs helper

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Hello,

On 30 November 2014 at 17:43, Goffredo Baroncelli <kreijack@xxxxxxxxx> wrote:
> Hi all,
>
> this patch provides a "mount.btrfs" helper for the mount command.
> A btrfs filesystem could span several disks. This helper scans all the
> partitions to discover all the disks required to mount a filesystem.
> So it would not necessary any-more to "scan" the partitions to mount a filesystem.
>

I would welcome this, as a general idea. At the moment in debian &
ubuntu, btrfs tools package ships udev rules to call "btrfs scan"
whenever device nodes appear.

If scan is built into mount, I would be able to drop that udev rule.
There are also some reports (not yet re-verified) that such udev rule
is not effective, that is btrfs mount fails when attempted before udev
has attempted to be run - e.g. from initrdless boot trying to mount
btrfs systems before udev-trigger has been run (to process "cold-plug"
events).

-- 
Regards,

Dimitri.
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