linux-kernel - Bind mount bug?

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Date:	Sun, 11 Nov 2007 11:06:52 +0100
From:	Frans Pop <elendil@...net.nl>
To:	linux-kernel@...r.kernel.org
Subject: Bind mount bug?

I'm not sure whether this is a bug or expected behavior.
Suppose I create a "looped" bind mount situation as follows.

# mkdir test
# touch test/foo
# mkdir bindtest
# touch bindtest/bar
# mkdir bindtest/test
# mount --bind test/ bindtest/test/
# ls bindtest/test/
foo
# mount --bind bindtest/ test/
# ls test/
bar  test
# ls test/test/
#

I'd expected the last command to list "foo", but it shows an empty dir.
Shouldn't it also show the original contents of test (as they were before 
the first bind mount)?

# mount | grep test
/root/test on /root/bindtest/test type none (rw,bind)
/root/bindtest on /root/test type none (rw,bind)

Cheers,
Frans Pop
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