From: dillon Date: Tue, 9 Apr 2013 01:50:41 +0000 (-0700) Subject: (no commit message) X-Git-Url: https://gitweb.dragonflybsd.org/ikiwiki.git/commitdiff_plain/91f53f5e132f3b869d667405300527fa2d2f6706?ds=sidebyside --- diff --git a/docs/developer/gsocprojectspage/index.mdwn b/docs/developer/gsocprojectspage/index.mdwn index 94d57ad2..94c36544 100644 --- a/docs/developer/gsocprojectspage/index.mdwn +++ b/docs/developer/gsocprojectspage/index.mdwn @@ -430,5 +430,34 @@ Meta information: --- + +##### HAMMER2 - Add block compression feature +Add physical block compression to HAMMER2. In HAMMER2 the a block reference describes a logical block and points to a physical block. The physical block can be a different size than the logical block, thus it is possible to implement a compression algorithm to reduce physical space use on a block-by-block basis. + +* Add a hammer2 utility command and associated ioctl to set the compression mode on a directory, to be inherited by any new files or subdirectories created therein. + +* Implement one compression algorithm capable of doing block compression on a 64KB block of data. The compression succeeds if it is able to compress at least 50% (down to 32KB), in powers of 2 (16KB, 8KB, etc), and the block is written uncompressed otherwise. + +Meta information: + +* Prerequisites: C +* Difficulty: Moderate +* Contact point: kernel@lists.dragonflybsd.org, Matthew Dillon + +--- + +##### HAMMER2 - Add block encryption feature +Add physical block encryption to HAMMER2. + +* Add a hammer2 utility command and associated ioctl to set the encryption mode on a directory, to be inherited by any new files or subdirectories created therein. + +* Implement one encryption method. Encryption meta-data space is available in the blockref, usually around 192 bits, which can be used to specify e.g. a public key, salt, IV, and/or encryption chaining through the filesystem topology. Actual physical blocks must be encrypted in-place (1:1). + +Meta information: + +* Prerequisites: C +* Difficulty: Moderate +* Contact point: kernel@lists.dragonflybsd.org, Matthew Dillon + --- (please add)