O2net: Disallow o2net accept connection request from itself.
authorTristan Ye <tristan.ye@oracle.com>
Mon, 2 Aug 2010 02:00:26 +0000 (10:00 +0800)
committerJoel Becker <joel.becker@oracle.com>
Sat, 7 Aug 2010 17:50:33 +0000 (10:50 -0700)
commit415cf32c9cdfcc60f34d0ac17f29634e941ba7d2
tree56675497e07772f99bd375a9f74542e3a12f2f37
parentb11f1f1ab73fd358b1b734a9427744802202ba68
O2net: Disallow o2net accept connection request from itself.

Currently, o2net_accept_one() is allowed to accept a connection from
listening node itself, such a fake connection will not be successfully
established due to no handshake detected afterwards, and later end up
with triggering connecting worker in a loop.

We're going to fix this by treating such connection request as 'invalid',
since we've got no chance of requesting connection from a node to itself
in a OCFS2 cluster.

The fix doesn't hurt user's scan for o2net-listener, it always gets a
successful connection from userpace.

Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
Acked-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
fs/ocfs2/cluster/tcp.c