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| author | Zheng Liu <wenqing.lz@taobao.com> | 2013-02-18 09:26:51 +0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-02-18 09:26:51 +0400 |
| commit | 06b0c886214a223dde7b21cbfc3008fd20a8ce16 (patch) | |
| tree | c1d3c51622e2a885446e8d617b953405412fc3aa /fs/ext4/extents_status.h | |
| parent | 0f70b40613ee14b0cadafeb461034cff81b4419a (diff) | |
| download | linux-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.h | 8 |
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); |