1 files changed, 46 insertions, 0 deletions

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index ce317e623862..a9a27816991a 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -38,6 +38,7 @@
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/mutex.h>
+#include <linux/netdevice.h>
 #include <rdma/rdma_netlink.h>
 
 #include "core_priv.h"
@@ -780,6 +781,51 @@ int ib_find_pkey(struct ib_device *device,
 }
 EXPORT_SYMBOL(ib_find_pkey);
 
+/**
+ * ib_get_net_dev_by_params() - Return the appropriate net_dev
+ * for a received CM request
+ * @dev:        An RDMA device on which the request has been received.
+ * @port:       Port number on the RDMA device.
+ * @pkey:       The Pkey the request came on.
+ * @gid:        A GID that the net_dev uses to communicate.
+ * @addr:       Contains the IP address that the request specified as its
+ *              destination.
+ */
+struct net_device *ib_get_net_dev_by_params(struct ib_device *dev,
+                                            u8 port,
+                                            u16 pkey,
+                                            const union ib_gid *gid,
+                                            const struct sockaddr *addr)
+{
+        struct net_device *net_dev = NULL;
+        struct ib_client_data *context;
+
+        if (!rdma_protocol_ib(dev, port))
+                return NULL;
+
+        down_read(&lists_rwsem);
+
+        list_for_each_entry(context, &dev->client_data_list, list) {
+                struct ib_client *client = context->client;
+
+                if (context->going_down)
+                        continue;
+
+                if (client->get_net_dev_by_params) {
+                        net_dev = client->get_net_dev_by_params(dev, port, pkey,
+                                                                gid, addr,
+                                                                context->data);
+                        if (net_dev)
+                                break;
+                }
+        }
+
+        up_read(&lists_rwsem);
+
+        return net_dev;
+}
+EXPORT_SYMBOL(ib_get_net_dev_by_params);
+
 static int __init ib_core_init(void)
 {
         int ret;