From d24bec3ae528a47149b838aad76c006d40fe8a39 Mon Sep 17 00:00:00 2001
From: Mark Fasheh <mfasheh@suse.de>
Date: Wed, 8 Aug 2012 11:33:54 -0700
Subject: [PATCH] btrfs: extended inode ref iteration

The iterate_irefs in backref.c is used to build path components from inode
refs. This patch adds code to iterate extended refs as well.

I had modify the callback function signature to abstract out some of the
differences between ref structures. iref_to_path() also needed similar
changes.

Signed-off-by: Mark Fasheh <mfasheh@suse.de>
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