btrfs-progs: Refactor block sizes users in backref.c

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>

diff --git a/backref.c b/backref.c
index e1f41e1..31681a8 100644 (file)
--- a/backref.c
+++ b/backref.c
@@ -451,7 +451,7 @@ static int __add_missing_keys(struct btrfs_fs_info *fs_info,
                        continue;
                BUG_ON(!ref->wanted_disk_byte);
                eb = read_tree_block(fs_info->tree_root, ref->wanted_disk_byte,
-                                    fs_info->tree_root->nodesize, 0);
+                                    fs_info->nodesize, 0);
                if (!extent_buffer_uptodate(eb)) {
                        free_extent_buffer(eb);
                        return -EIO;
@@ -804,7 +804,7 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
                            ref->level == 0) {
                                u32 bsz;
                                struct extent_buffer *eb;
-                               bsz = fs_info->extent_root->nodesize;
+                               bsz = fs_info->nodesize;
                                eb = read_tree_block(fs_info->extent_root,
                                                           ref->parent, bsz, 0);
                                if (!extent_buffer_uptodate(eb)) {
@@ -1154,7 +1154,7 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
        }
        btrfs_item_key_to_cpu(path->nodes[0], found_key, path->slots[0]);
        if (found_key->type == BTRFS_METADATA_ITEM_KEY)
-               size = fs_info->extent_root->nodesize;
+               size = fs_info->nodesize;
        else if (found_key->type == BTRFS_EXTENT_ITEM_KEY)
                size = found_key->offset;