Re: [RFC] [PATCH 2/2] Btrfs: move over to use ->update_time

[Mimi Zohar <zohar@linux.vnet.ibm.com>]

On Wed, 2012-04-04 at 13:43 -0400, Josef Bacik wrote:
> On Wed, Apr 04, 2012 at 08:24:19PM +0300, Kasatkin, Dmitry wrote:
> > Hello,
> > 
> > Mimi and I working on IMA/EVM (security/integrity) and it uses
> > i_version for checking if file content has been changed.
> > extX file systems support i_version updates with mounting file system
> > with "iversion" option or via kernel command line parameter
> > "i_version"
> > 
> > It seems iversion option is not recognized when mounting btrfs.
> > I see this patchset deals with i_version update as well..
> > Can you please give an advice how to use i_version with btrfs?
> >
> 
> Oh good somebody uses this?  We actually have a ->sequence thing we use for
> this, the grand idea was to make it smarter about telling nfs when something
> changed, but if you guys use i_version we could probably get rid of our in-core
> sequence and use the normal inodes i_version and then just store it in our
> sequence field on disk.  I'll do it without a mount option tho so it just works,
> does that sound good to you?  Thanks,
> 
> Josef 

Sounds really good!

thanks,

Mimi