RDMA/cma: Set qkey for AF_IB

Allow the user to specify the qkey when using AF_IB.  The qkey is
added to struct rdma_ucm_conn_param in place of a reserved field, but
for backwards compatability, is only accessed if the associated
rdma_cm_id is using AF_IB.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

2 files changed, 2 insertions, 1 deletions

diff --git a/include/rdma/rdma_cm.h b/include/rdma/rdma_cm.h
index 1e6c3c7af898..966f90ba8d8a 100644
--- a/include/rdma/rdma_cm.h
+++ b/include/rdma/rdma_cm.h
@@ -98,6 +98,7 @@ struct rdma_conn_param {
         /* Fields below ignored if a QP is created on the rdma_cm_id. */
         u8 srq;
         u32 qp_num;
+        u32 qkey;
 };
 
 struct rdma_ud_param {
diff --git a/include/uapi/rdma/rdma_user_cm.h b/include/uapi/rdma/rdma_user_cm.h
index 1ee9239ff8c2..29de08f603ac 100644
--- a/include/uapi/rdma/rdma_user_cm.h
+++ b/include/uapi/rdma/rdma_user_cm.h
@@ -131,7 +131,7 @@ struct rdma_ucm_query_route_resp {
 
 struct rdma_ucm_conn_param {
         __u32 qp_num;
-        __u32 reserved;
+        __u32 qkey;
         __u8  private_data[RDMA_MAX_PRIVATE_DATA];
         __u8  private_data_len;
         __u8  srq;