diff options
author | Chris Mason <chris.mason@oracle.com> | 2008-09-05 16:13:11 -0400 |
---|---|---|
committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:07 -0400 |
commit | e02119d5a7b4396c5a872582fddc8bd6d305a70a (patch) | |
tree | 825efe2a79dbca8d61256183f3526a5b5dc40dc6 /fs/btrfs/btrfs_inode.h | |
parent | a1b32a5932cfac7c38b442582285f3da2a09dfd8 (diff) |
Btrfs: Add a write ahead tree log to optimize synchronous operations
File syncs and directory syncs are optimized by copying their
items into a special (copy-on-write) log tree. There is one log tree per
subvolume and the btrfs super block points to a tree of log tree roots.
After a crash, items are copied out of the log tree and back into the
subvolume. See tree-log.c for all the details.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/btrfs_inode.h')
-rw-r--r-- | fs/btrfs/btrfs_inode.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 111f90524ae1..fcc8cf27e906 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -33,6 +33,7 @@ struct btrfs_inode { struct extent_io_tree io_failure_tree; struct mutex csum_mutex; struct mutex extent_mutex; + struct mutex log_mutex; struct inode vfs_inode; struct btrfs_ordered_inode_tree ordered_tree; @@ -44,10 +45,17 @@ struct btrfs_inode { struct list_head delalloc_inodes; + /* full 64 bit generation number */ + u64 generation; + /* * transid of the trans_handle that last modified this inode */ u64 last_trans; + /* + * transid that last logged this inode + */ + u64 logged_trans; u64 delalloc_bytes; u64 disk_i_size; u32 flags; |