# Re: \[PATCH 0/2\] Shared flags

- From: Jamie Lokier \<hidden\>
- Date: 2008-11-14 03:37:23 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2008/11/27221
- Thread: https://ratatoskr.run/linux-fsdevel/2008/11/27194/t.md

```text
Christoph Hellwig wrote:
> On Thu, Nov 13, 2008 at 01:08:58PM +0300, Pavel Shilovsky wrote:
> > We suggest to switch on this flags with special options during mounting.  
> > By default, it'll be switch off.
> > This solution deletes possibility of such situations, like in example.
> 
> Sorry, having completely weird open modes only for one filesystem, and
> only depending on mount options is not very nice to the user.
> 
> And options or not allowing the above functionality for regular users
> is a security issue.

A generic mount option is currently used for mandatory locking - this
is very similar.

The only different I see, for security, is with mandatory locking a
process which doesn't want to get stuck can check the permission bits
before opening a file.  But I'm not aware of anything actually doing this.

-- Jamie
```