+ /*
+ * For debug-tree, we care nothing about extent tree (it's just backref
+ * and usage accounting, only makes sense for RW operations).
+ * Use NO_BLOCK_GROUPS here could also speedup open_ctree() and allow us
+ * to inspect fs with corrupted extent tree blocks, and show as many good
+ * tree blocks as possible.
+ */
+ open_ctree_flags = OPEN_CTREE_PARTIAL | OPEN_CTREE_NO_BLOCK_GROUPS;