Btrfs: Remove offset field from struct btrfs_extent_ref

The offset field in struct btrfs_extent_ref records the position
inside file that file extent is referenced by. In the new back
reference system, tree leaves holding references to file extent
are recorded explicitly. We can scan these tree leaves very quickly, so the
offset field is not required.

This patch also makes the back reference system check the objectid
when extents are in deleting.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index ab7a0f61ded8..50c8a066d1f0 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -658,7 +658,7 @@ long btrfs_ioctl_clone(struct file *file, unsigned long src_fd)
                                                      ds, dl, leaf->start,
                                                      root->root_key.objectid,
                                                      trans->transid,
-                                                     inode->i_ino, key.offset);
+                                                     inode->i_ino);
                                         BUG_ON(ret);
                                 }
                         }