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Commit b0569e40 authored by Sean Hefty's avatar Sean Hefty Committed by Roland Dreier
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RDMA/cma: Restrict AF_IB loopback to binding to IB devices only 



If a user specifies AF_IB as the source address for a loopback
connection, limit the resolution to IB devices only.

Signed-off-by: default avatarSean Hefty <sean.hefty@intel.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent f4753834

drivers/infiniband/core/cma.c

+20 −8
Original line number Diff line number Diff line
@@ -1981,26 +1981,38 @@ static void cma_set_loopback(struct sockaddr *addr) 


static int cma_bind_loopback(struct rdma_id_private *id_priv)

{

	struct cma_device *cma_dev;

	struct cma_device *cma_dev, *cur_dev;

	struct ib_port_attr port_attr;

	union ib_gid gid;

	u16 pkey;

	int ret;

	u8 p;



	cma_dev = NULL;

	mutex_lock(&lock);

	if (list_empty(&dev_list)) {

	list_for_each_entry(cur_dev, &dev_list, list) {

		if (cma_family(id_priv) == AF_IB &&

		    rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)

			continue;



		if (!cma_dev)

			cma_dev = cur_dev;



		for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {

			if (!ib_query_port(cur_dev->device, p, &port_attr) &&

			    port_attr.state == IB_PORT_ACTIVE) {

				cma_dev = cur_dev;

				goto port_found;

			}

		}

	}



	if (!cma_dev) {

		ret = -ENODEV;

		goto out;

	}

	list_for_each_entry(cma_dev, &dev_list, list)

		for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)

			if (!ib_query_port(cma_dev->device, p, &port_attr) &&

			    port_attr.state == IB_PORT_ACTIVE)

				goto port_found;



	p = 1;

	cma_dev = list_entry(dev_list.next, struct cma_device, list);



port_found:

	ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);