tree 6afb9fe59a06ce621cb11d570e432e7d739376ff
parent 6af67d8205cf65fbaaa743edc7ebb46e486e34ff
author Mark Fasheh <mark.fasheh@oracle.com> 1173314817 -0800
committer Mark Fasheh <mark.fasheh@oracle.com> 1177624957 -0700

ocfs2: make room for unwritten extents flag

Due to the size of our group bitmaps, we'll never have a leaf node extent
record with more than 16 bits worth of clusters. Split e_clusters up so that
leaf nodes can get a flags field where we can mark unwritten extents.
Interior nodes whose length references all the child nodes beneath it can't
split their e_clusters field, so we use a union to preserve sizing there.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>