From: Tao Ma <tao.ma@oracle.com>
Date: Tue, 18 Aug 2009 03:22:21 +0000 (+0800)
Subject: ocfs2: Abstract extent split process.
X-Git-Tag: v2.6.32-rc1~173^2~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=555936bfcb1af26c6919d6cedb83710bb03d4322;p=pandora-kernel.git

ocfs2: Abstract extent split process.

ocfs2_mark_extent_written actually does the following things:
1. check the parameters.
2. initialize the left_path and split_rec.
3. call __ocfs2_mark_extent_written. it will do:
   1) check the flags of unwritten
   2) do the real split work.
The whole process is packed tightly somehow. So this patch
will abstract 2 different functions so that future b-tree
operation can work with it.

1. __ocfs2_split_extent will accept path and split_rec and do
  the real split work.
2. ocfs2_change_extent_flag will accept a new flag and initialize
   path and split_rec.

So now ocfs2_mark_extent_written will do:
1. check the parameters.
2. call ocfs2_change_extent_flag.
   1) initalize the left_path and split_rec.
   2) check whether the new flags conflict with the old one.
   3) call __ocfs2_split_extent to do the split.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
---

Reading git-diff-tree failed