Am Sat, 16 Sep 2017 00:02:01 +0200
schrieb Ulli Horlacher <frams...@rus.uni-stuttgart.de>:

> On Fri 2017-09-15 (23:44), Ulli Horlacher wrote:
> > On Fri 2017-09-15 (22:07), Peter Grandi wrote:
> >   
>  [...]  
> > > 
> > > Ordinary permissions still apply both to 'create' and 'delete':  
> > 
> > My user tux is the owner of the snapshot directory, because he has
> > created it!  
> 
> I can delete normal subvolumes but not the readonly snapshots:
> 
> tux@xerus:/test/tux/zz/.snapshot: btrfs subvolume create test
> Create subvolume './test'
> 
> tux@xerus:/test/tux/zz/.snapshot: ll
> drwxr-xr-x  tux      users    - 2017-09-15 18:22:26
> 2017-09-15_1822.test drwxr-xr-x  tux      users    - 2017-09-15
> 18:22:26 2017-09-15_1824.test drwxr-xr-x  tux      users    -
> 2017-09-15 18:57:39 2017-09-15_1859.test drwxr-xr-x  tux
> users    - 2017-09-15 23:58:51 test
> 
> tux@xerus:/test/tux/zz/.snapshot: btrfs subvolume delete test
> Delete subvolume (no-commit): '/test/tux/zz/.snapshot/test'
> 
> tux@xerus:/test/tux/zz/.snapshot: btrfs subvolume delete
> 2017-09-15_1859.test Delete subvolume (no-commit):
> '/test/tux/zz/.snapshot/2017-09-15_1859.test' ERROR: cannot delete
> '/test/tux/zz/.snapshot/2017-09-15_1859.test': Read-only file system

See "man mount" in section btrfs mount options: There is a mount option
to allow normal user to delete snapshots. But this is said to has
security implication I cannot currently tell. Maybe someone else knows.


-- 
Regards,
Kai

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