[Bug 8918] Use fiemap to quickly detect zero ranges of source file

samba-bugs at samba.org samba-bugs at samba.org
Sat Jun 16 12:01:35 MDT 2012


Wayne Davison <wayned at samba.org> changed:

           What    |Removed                     |Added
             Status|NEW                         |ASSIGNED

--- Comment #3 from Wayne Davison <wayned at samba.org> 2012-06-16 18:01:35 UTC ---
I would like to include support for SEEK_HOLE and SEEK_DATA in rsync's --sparse
code, but the rsync protocol doesn't yet support indicating holes in the data
between the sender and the receiver (the receiver just scans for zeros and
leaves holes when they are found).

We'd also need configure support (if it can be compiled) and run-time support
(if the current kernel supports the feature and detection if the source
filesystem supports it too).

I'll look into this at some point.  Patches welcomed.

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