[PATCH] fs: Check if automount actually mounts something

[Uwe Kleine-König]

On Thu, Jul 14, 2022 at 09:35:09PM +0200, Sascha Hauer wrote:
> An automount command that returns successfully but doesn't mount
> anything makes barebox hang as can be reproduced with:
> 
> automount -d /mnt/foo true
> ls /mnt/foo
> 
> Check if the current dentry is a mountpoint after running the automount
> command, otherwise return with an error from automount_mount().

While I think the intention of this patch is fine, I have little doubts
if that breaks some workflows, e.g. something like:

	automount -d /mnt/tralala 'for p in 0 1 2; do mkdir ${automount_path}/${p} && mount /dev/disk0.${p} ${automount_path}/${p} || break; done'

I admit it's a bit constructed, but maybe that's only because I'm not
creative enough?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |
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