RDMA/addr: Keep pointer to netdevice in struct rdma_dev_addr

Keep a pointer to the local (src) netdevice in struct rdma_dev_addr,
and copy it in as part of rdma_copy_addr().  Use rdma_translate_ip()
in cma_new_conn_id() to reduce some code duplication and also make
sure the src_dev member gets set.

In a high-availability configuration the netdevice pointer can be used
by the RDMA CM to align RDMA sessions to use the same links as the IP
stack does under fail-over and route change cases.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/rdma/ib_addr.h b/include/rdma/ib_addr.h
index b42bdd000419..483057b2f4b4 100644
--- a/include/rdma/ib_addr.h
+++ b/include/rdma/ib_addr.h
@@ -61,6 +61,7 @@ struct rdma_dev_addr {
         unsigned char dst_dev_addr[MAX_ADDR_LEN];
         unsigned char broadcast[MAX_ADDR_LEN];
         enum rdma_node_type dev_type;
+        struct net_device *src_dev;
 };
 
 /**