RDS: Implement atomic operations

Implement a CMSG-based interface to do FADD and CSWP ops.

Alter send routines to handle atomic ops.

Add atomic counters to stats.

Add xmit_atomic() to struct rds_transport

Inline rds_ib_send_unmap_rdma into unmap_rm

Signed-off-by: Andy Grover <andy.grover@oracle.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index 0f3b5a2f3fe0..242231f09464 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -298,7 +298,9 @@ static struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev)
         ibmr->fmr = ib_alloc_fmr(rds_ibdev->pd,
                         (IB_ACCESS_LOCAL_WRITE |
                          IB_ACCESS_REMOTE_READ |
-                         IB_ACCESS_REMOTE_WRITE),
+                         IB_ACCESS_REMOTE_WRITE|
+                         IB_ACCESS_REMOTE_ATOMIC),
+
                         &pool->fmr_attr);
         if (IS_ERR(ibmr->fmr)) {
                 err = PTR_ERR(ibmr->fmr);