btrfs-progs: add the ability to fix shifted item offsets

A user had a corrupted fs where the items had been shifted improperly.  This
patch adds the ability to fix this sort of problem within fsck.  We will simply
shift the item over to the proper offset and update the offsets to make sure
they are correct.  I tested this with a hand crafted fs that was broken in the
same way as the user, and I've included the file as a new test.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 0 insertions, 0 deletions

diff --git a/tests/fsck-tests/003-shift-offsets.img b/tests/fsck-tests/003-shift-offsets.img
new file mode 100644
index 00000000..ce23f673
--- /dev/null
+++ b/tests/fsck-tests/003-shift-offsets.img