From patchwork Wed Apr 18 07:07:13 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [1/6] ext4: add two structures supporting status extent tree Date: Tue, 17 Apr 2012 21:07:13 -0000 From: Allison Henderson X-Patchwork-Id: 153407 Message-Id: <1334732838-25102-2-git-send-email-achender@linux.vnet.ibm.com> To: linux-ext4@vger.kernel.org Cc: Allison Henderson , Yongqiang Yang This patch adds two structures that supports status extent tree and status_extent_info to inode_info. Signed-off-by: Yongqiang Yang Signed-off-by: Allison Henderson --- :100644 100644 1bbd2ca... 704021e... M fs/ext4/ext4.h :000000 100644 0000000... cbf96ed... A fs/ext4/status_extents.h fs/ext4/ext4.h | 5 +++++ fs/ext4/status_extents.h | 22 ++++++++++++++++++++++ 2 files changed, 27 insertions(+), 0 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 1bbd2ca..704021e 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -782,6 +782,8 @@ struct ext4_ext_cache { __u32 ec_len; /* must be 32bit to return holes */ }; +#include "status_extents.h" + /* * fourth extended file system inode data in memory */ @@ -859,6 +861,9 @@ struct ext4_inode_info { struct list_head i_prealloc_list; spinlock_t i_prealloc_lock; + /* delayed extents */ + struct ext4_se_tree i_se_tree; + /* ialloc */ ext4_group_t i_last_alloc_group; diff --git a/fs/ext4/status_extents.h b/fs/ext4/status_extents.h new file mode 100644 index 0000000..cbf96ed --- /dev/null +++ b/fs/ext4/status_extents.h @@ -0,0 +1,22 @@ +/* + * fs/ext4/status_extents.h + * + * Written by Yongqiang Yang + * + */ + +#ifndef _EXT4_STATUS_EXTENTS_H +#define _EXT4_STATUS_EXTENTS_H + +struct status_extent { + struct rb_node rb_node; + ext4_lblk_t start; /* first block extent covers */ + ext4_lblk_t len; /* length of extent in block */ +}; + +struct ext4_se_tree { + struct rb_root root; + struct status_extent *cache_se; /* recently accessed extent */ +}; + +#endif /* _EXT4_STATUS_EXTENTS_H */