tree e4e2b6758fb57e53fc0cec268dd133955ee7e615
parent a408365c62762c30419018587cffd2b89836434e
author Qu Wenruo <quwenruo@cn.fujitsu.com> 1444622896 +0800
committer Chris Mason <clm@fb.com> 1445477863 -0700

btrfs: extent_io: Introduce needed structure for recoding set/clear bits

Add a new structure, extent_change_set, to record how many bytes are
changed in one set/clear_extent_bits() operation, with detailed changed
ranges info.

This provides the needed facilities for later qgroup reserve framework.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>