git: HAMMER VFS - Implement Version 6 features as WIP (work in progress)

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

commit 89cba4dfde9336288af856ddb7f90aa103acee5c
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date:   Mon Jan 10 15:39:47 2011 -0800

    HAMMER VFS - Implement Version 6 features as WIP (work in progress)
    
    * Add a new directory hash which generates segmented CRC and then adds
      them together for the filename.
    
      This tends to result in a directory key offset instead of a complete
      re-randomization when a temporary file extension is renamed to its base
      filename.
    
      Numerous programs create temporary files and then rename them.  This
      tends to maintain inode number / directory name entry ordering a bit
      better.
    
    * This is a work in progress version.  Production systems should not upgrade
      their HAMMER filesystem to version 6 at this time.

Summary of changes:
 sys/vfs/hammer/hammer_disk.h  |    3 +-
 sys/vfs/hammer/hammer_inode.c |    6 ++
 sys/vfs/hammer/hammer_ioctl.c |    4 +
 sys/vfs/hammer/hammer_subs.c  |  124 ++++++++++++++++++++++++++---------------
 4 files changed, 91 insertions(+), 46 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/89cba4dfde9336288af856ddb7f90aa103acee5c


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