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authorZheng Liu <wenqing.lz@taobao.com>2013-02-18 09:26:51 +0400
committerTheodore Ts'o <tytso@mit.edu>2013-02-18 09:26:51 +0400
commit06b0c886214a223dde7b21cbfc3008fd20a8ce16 (patch)
treec1d3c51622e2a885446e8d617b953405412fc3aa /fs/ext4/extents_status.h
parent0f70b40613ee14b0cadafeb461034cff81b4419a (diff)
downloadlinux-06b0c886214a223dde7b21cbfc3008fd20a8ce16.tar.xz
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>
Diffstat (limited to 'fs/ext4/extents_status.h')
-rw-r--r--fs/ext4/extents_status.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
index 077f82db092a..81e9339f23f1 100644
--- a/fs/ext4/extents_status.h
+++ b/fs/ext4/extents_status.h
@@ -22,8 +22,8 @@
struct extent_status {
struct rb_node rb_node;
- ext4_lblk_t start; /* first block extent covers */
- ext4_lblk_t len; /* length of extent in block */
+ ext4_lblk_t es_lblk; /* first logical block extent covers */
+ ext4_lblk_t es_len; /* length of extent in block */
};
struct ext4_es_tree {
@@ -35,9 +35,9 @@ extern int __init ext4_init_es(void);
extern void ext4_exit_es(void);
extern void ext4_es_init_tree(struct ext4_es_tree *tree);
-extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t start,
+extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
ext4_lblk_t len);
-extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t start,
+extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
ext4_lblk_t len);
extern ext4_lblk_t ext4_es_find_extent(struct inode *inode,
struct extent_status *es);