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...can''t hardlink directories. This makes the check in btrfsck bogus, when we delete a we remove the ref key for it so any lookups into /mnt/b/a will just give a blank directory as it''s supposed to. Fix this by only saying the backref is reachable if there is both a DIR_ITEM and a REF_KEY for the given root. With this patch I no longer see errors when running this reproducer. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> --- cmds-check.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/cmds-check.c b/cmds-check.c index bbef89a..408...