[RFC, PATCH 0/2] fiemap: filesystem free space mapping

[Dave Chinner]

On Wed, Oct 24, 2012 at 11:09:51AM -0400, Christoph Hellwig wrote:
> On Wed, Oct 24, 2012 at 07:47:17AM -0400, Chris Mason wrote:
> > I'm all for it in the main fiemap call, it makes much more sense for the
> > users I think.
> 
> How so?  Current fiemap is a per-inode information, Daves new call is
> per-fs.  Making one a flag of another is a gross user interface.  In
> addition we're bound to get issue where filesystems fail to wire up
> fiemap to the tons of different iops just for this operation, or
> accidentally wire up "real" fiemap to things like special files or
> pipes.
> 
> Btw, I'd like t orestate that I really love to see this functionality in
> the VFS, just not multiplexed over FIEMAP.

That's fine. I just wanted to clarify what you were asking.
FIEMAPFS it is, then...

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com