| commit | 55ec5c00022be8f2bbed06b99b5f4be5832a5451 | |
| author | David Sterba <dsterba@suse.cz> | |
| Thu, 19 Apr 2012 13:09:09 +0000 (19 15:09 +0200) | ||
| committer | David Sterba <dsterba@suse.cz> | |
| Wed, 12 Sep 2012 22:45:40 +0000 (13 00:45 +0200) | ||
| tree | 4b13741dfd1c608f03f2340bdb7b40140f0bc076 | treesnapshot (tar.gz zip) |
| parent | 28a33cbc24e4256c143dce96c7d93bf423229f92 | commitdiff |
btrfs: ioctl to clear unused space
abuse discard infrastructure and pass down whether we want to trim or
just zero out. works, does not corrupt data.
TODO:
- more options how to clean (ie. a known signature of freed block, 2
types of them, or random garbage, or all zeros)
- what to do for SSD mixed with HDD ?
Signed-off-by: David Sterba <dsterba@suse.cz>
abuse discard infrastructure and pass down whether we want to trim or
just zero out. works, does not corrupt data.
TODO:
- more options how to clean (ie. a known signature of freed block, 2
types of them, or random garbage, or all zeros)
- what to do for SSD mixed with HDD ?
Signed-off-by: David Sterba <dsterba@suse.cz>