[RFC][PATCH 01/10 v1][RESEND] ext4: add two structures supporting extent status tree
From: Zheng Liu <hidden>
Date: 2012-07-22 07:59:37
Also in:
linux-fsdevel
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
From: Zheng Liu <redacted> This patch adds two structures that supports status extent tree and status_extent_info to inode_info. Signed-off-by: Yongqiang Yang <redacted> Signed-off-by: Allison Henderson <redacted> Signed-off-by: Zheng Liu <redacted> --- fs/ext4/ext4.h | 5 +++++ fs/ext4/extents_status.h | 22 ++++++++++++++++++++++ 2 files changed, 27 insertions(+), 0 deletions(-) create mode 100644 fs/ext4/extents_status.h
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index cfc4e01..c0fe23e 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h@@ -810,6 +810,8 @@ 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 */
@@ -887,6 +889,9 @@ 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; + /* ialloc */ ext4_group_t i_last_alloc_group;
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
new file mode 100644
index 0000000..d87fd71
--- /dev/null
+++ b/fs/ext4/extents_status.h@@ -0,0 +1,22 @@ +/* + * fs/ext4/extents_status.h + * + * Written by Yongqiang Yang <xiaoqiangnk@gmail.com> + * + */ + +#ifndef _EXT4_EXTENTS_STATUS_H +#define _EXT4_EXTENTS_STATUS_H + +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 */ +}; + +struct ext4_es_tree { + struct rb_root root; + struct extent_status *cache_es; /* recently accessed extent */ +}; + +#endif /* _EXT4_EXTENTS_STATUS_H */
--
1.7.4.1