On 09/15/2017 06:37 PM, Ulli Horlacher wrote:
> I have my btrfs filesystem mounted with option user_subvol_rm_allowed
>
> tux@xerus: btrfs --version
> btrfs-progs v4.4
>
> tux@xerus: uname -a
> Linux xerus 4.4.0-93-generic #116-Ubuntu SMP Fri Aug 11 21:17:51 UTC 2017
> x86_64 x86_64 x86_64 GNU/Linux
>
> tux@xerus: id
> uid=1000(tux) gid=100(users) groups=100(users)
>
> tux@xerus: btrfs subvolume snapshot -r /test/tux/zz
> /test/tux/zz/.snapshot/2017-09-15_1824.test
> tux@xerus: btrfs subvolume delete /test/tux/zz/.snapshot/2017-09-15_1824.test
> Delete subvolume (no-commit): '/test/tux/zz/.snapshot/2017-09-15_1824.test'
> ERROR: cannot delete '/test/tux/zz/.snapshot/2017-09-15_1824.test': Read-only
> file system
>
> root can delete this snapshot, but not the user. Why?
You should change the "ro" property to false before deleting it
btrfs property set /test/tux/zz/.snapshot/2017-09-15_1824.test ro false
BR
G.Baroncelli
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