[PATCH 1/2] ocfs2: Add group extend for online resize

This patch adds the ability for a userspace program to request an extend of
last cluster group on an Ocfs2 file system. The request is made via ioctl,
OCFS2_IOC_GROUP_EXTEND. This is derived from EXT3_IOC_GROUP_EXTEND, but is
obviously Ocfs2 specific.

tunefs.ocfs2 would call this for an online-resize operation if the last
cluster group isn't full.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

diff --cc fs/ocfs2/Makefile
Simple merge

diff --cc fs/ocfs2/buffer_head_io.c
Simple merge

diff --cc fs/ocfs2/buffer_head_io.h
Simple merge

diff --cc fs/ocfs2/ioctl.c
Simple merge

diff --cc fs/ocfs2/journal.h
Simple merge

diff --cc fs/ocfs2/ocfs2_fs.h
Simple merge

diff --cc fs/ocfs2/resize.c
Simple merge

diff --cc fs/ocfs2/resize.h
Simple merge

diff --cc fs/ocfs2/suballoc.c
Simple merge

diff --cc fs/ocfs2/suballoc.h
Simple merge