[Your Reply-to: header was screwed up, so I'm sending this again.

From: Ken D'Ambrosio <ken@jots.org>
Reply-to: File's@jots.org, checksum?@jots.org

]

On Tue, Sep 20, 2011 at 04:35:40PM +0100, Hugo Mills wrote:
> On Tue, Sep 20, 2011 at 11:24:30AM -0400, Ken D'Ambrosio wrote:
> > Just wondering if/how one goes about getting the btrfs checksum of a given
> > file.  Is there a way?
> 
>    Checksums are computed on individual 4k blocks, not on the whole
> file. There's no explicit interface for retrieving checksums, but if
> you understand the data structures, you can get hold of the checksums
> for a file using the BTRFS_IOC_TREE_SEARCH ioctl.
> 
>    Hugo.
> 

-- 
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
  PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
   --- "How deep will this sub go?" "Oh,  she'll go all the way to ---   
                    the bottom if we don't stop her."