ext4: refine extent status tree
authorZheng Liu <wenqing.lz@taobao.com>
Mon, 18 Feb 2013 05:26:51 +0000 (00:26 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Mon, 18 Feb 2013 05:26:51 +0000 (00:26 -0500)
commit06b0c886214a223dde7b21cbfc3008fd20a8ce16
treec1d3c51622e2a885446e8d617b953405412fc3aa
parent0f70b40613ee14b0cadafeb461034cff81b4419a
ext4: refine extent status tree

This commit refines the extent status tree code.

1) A prefix 'es_' is added to to the extent status tree structure
members.

2) Refactored es_remove_extent() so that __es_remove_extent() can be
used by es_insert_extent() to remove the old extent entry(-ies) before
inserting a new one.

3) Rename extent_status_end() to ext4_es_end()

4) ext4_es_can_be_merged() is define to check whether two extents can
be merged or not.

5) Update and clarified comments.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
fs/ext4/extents.c
fs/ext4/extents_status.c
fs/ext4/extents_status.h
fs/ext4/file.c
include/trace/events/ext4.h