path: root/fs/ext4/ext4.h
diff options
authorZheng Liu <wenqing.lz@taobao.com>2012-11-08 15:18:54 -0500
committerTheodore Ts'o <tytso@mit.edu>2012-11-08 15:18:54 -0500
commitc0677e6d0f9d991adff972b8d06cb83de1f8ee8e (patch)
treef320c2fb163763f200d0126c90fcbd909bfbedf2 /fs/ext4/ext4.h
parent07aa2ea13814ea60d12f7330b6d5ccfdb0c3ba4d (diff)
ext4: add data structures for the extent status tree
This patch adds two structures that supports extent status tree, extent_status and ext4_es_tree. Currently extent_status is used to track a delay extent for an inode, which record the start block and the length of the delay extent. ext4_es_tree is used to store all extent_status for an inode in memory. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: Allison Henderson <achender@linux.vnet.ibm.com> Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 3c20de1d59d..bcc634b26d4 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -811,6 +811,8 @@ struct ext4_ext_cache {
__u32 ec_len; /* must be 32bit to return holes */
+#include "extents_status.h"
* fourth extended file system inode data in memory
@@ -888,6 +890,10 @@ struct ext4_inode_info {
struct list_head i_prealloc_list;
spinlock_t i_prealloc_lock;
+ /* extents status tree */
+ struct ext4_es_tree i_es_tree;
+ rwlock_t i_es_lock;
/* ialloc */
ext4_group_t i_last_alloc_group;