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SubjectRe: [ofa-general] [PATCH 2.6.25] RDMA/cxgb3: Fail loopbackconnections.
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Steve, I had to update the patch adding an include and fixing the
function declaration (as below)... but how much testing have you done
with this??

commit 8704e9a8790cc9e394198663c1c9150c899fb9a2
Author: Steve Wise <swise@opengridcomputing.com>
Date: Tue Feb 12 16:09:29 2008 -0600

RDMA/cxgb3: Fail loopback connections

The cxgb3 HW and driver don't support loopback RDMA connections. So
fail any connection attempt where the destination address is local.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/cxgb3/iwch_cm.c b/drivers/infiniband/hw/cxgb3/iwch_cm.c
index e9a08fa..320f2b6 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_cm.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_cm.c
@@ -35,6 +35,7 @@
#include <linux/skbuff.h>
#include <linux/timer.h>
#include <linux/notifier.h>
+#include <linux/inetdevice.h>

#include <net/neighbour.h>
#include <net/netevent.h>
@@ -1784,6 +1785,17 @@ err:
return err;
}

+static int is_loopback_dst(struct iw_cm_id *cm_id)
+{
+ struct net_device *dev;
+
+ dev = ip_dev_find(&init_net, cm_id->remote_addr.sin_addr.s_addr);
+ if (!dev)
+ return 0;
+ dev_put(dev);
+ return 1;
+}
+
int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
{
int err = 0;
@@ -1791,6 +1803,11 @@ int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
struct iwch_ep *ep;
struct rtable *rt;

+ if (is_loopback_dst(cm_id)) {
+ err = -ENOSYS;
+ goto out;
+ }
+
ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
if (!ep) {
printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __FUNCTION__);

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