Btrfs: Implement new dir index format

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 3bf40591742a..b7bd60e4fdd7 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -43,6 +43,21 @@ struct btrfs_inode {
         u64 delalloc_bytes;
         u64 disk_i_size;
         u32 flags;
+
+        /*
+         * if this is a directory then index_cnt is the counter for the index
+         * number for new files that are created
+         */
+        u64 index_cnt;
+
+        /*
+         * index holds the directory index for this inode on creation, so
+         * add_link can do what its supposed to.  This isn't populated when the
+         * inode is read because there isn't really a reason to know this unless
+         * we are creating the directory index or deleting it, and deletion
+         * reads the index off of the inode reference at unlink time.
+         */
+        u64 index;
 };
 
 static inline struct btrfs_inode *BTRFS_I(struct inode *inode)