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Commit 8704e9a8 authored by Steve Wise's avatar Steve Wise Committed by Roland Dreier
Browse files

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: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 7c7a9bcc

drivers/infiniband/hw/cxgb3/iwch_cm.c

+17 −0
Original line number Diff line number Diff line
@@ -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 @@ int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 
	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__);