On Mon, 01 Dec 2014 14:38:16 +0100, MegaBrutal wrote:

> I've also noticed, a subvolume can just be deleted with an "rm -r",
> just like an ordinary directory. I'd consider to only allow subvolume

Nope:

root>btrfs subvolume create foo
Create subvolume './foo'
root>touch foo/bla
root>ll foo 
total 0
-rw-r--r-- 1 root root 0 Dec  1 14:47 bla
root>rm -rf foo 
rm: cannot remove ‘foo’: Operation not permitted
root>

The files of the subvolume do get deleted though, but that's correct.

Not sure what you did, but what you want is already the case.

-h

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