Btrfs: Add lowest key information to back refs for extent tree blocks as well.

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

1 files changed, 4 insertions, 10 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index bb70db0c9df4..03fea037667e 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -563,6 +563,7 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
         u64 extent_num_bytes = 0;
         u64 item_end = 0;
         u64 root_gen = 0;
+        u64 root_owner = 0;
         int found_extent;
         int del_item;
         int extent_type = -1;
@@ -673,15 +674,8 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
                                         found_extent = 1;
                                         inode->i_blocks -= num_dec;
                                 }
-                                if (leaf == root->node) {
-                                        root_gen =
-                                                btrfs_header_generation(leaf);
-                                } else {
-                                        struct extent_buffer *parent;
-                                        parent = path->nodes[1];
-                                        root_gen =
-                                                btrfs_header_generation(parent);
-                                }
+                                root_gen = btrfs_header_generation(leaf);
+                                root_owner = btrfs_header_owner(leaf);
                         }
                 } else if (extent_type == BTRFS_FILE_EXTENT_INLINE &&
                            !del_item) {
@@ -703,7 +697,7 @@ delete:
                 if (found_extent) {
                         ret = btrfs_free_extent(trans, root, extent_start,
                                                 extent_num_bytes,
-                                                root->root_key.objectid,
+                                                root_owner,
                                                 root_gen, inode->i_ino,
                                                 found_key.offset, 0);
                         BUG_ON(ret);