[PATCH rdma-next v1 6/7] RDMA/cm: Set flow label of recv_wc based on primary flow label

From: Leon Romanovsky <leon@kernel.org>
To: Doug Ledford <dledford@redhat.com>, Jason Gunthorpe <jgg@mellanox.com>
Cc: Mark Zhang <markz@mellanox.com>,
	linux-rdma@vger.kernel.org, Maor Gottlieb <maorg@mellanox.com>
Subject: [PATCH rdma-next v1 6/7] RDMA/cm: Set flow label of recv_wc based on primary flow label
Date: Sun, 22 Mar 2020 11:30:30 +0200	[thread overview]
Message-ID: <20200322093031.918447-7-leon@kernel.org> (raw)
In-Reply-To: <20200322093031.918447-1-leon@kernel.org>

From: Mark Zhang <markz@mellanox.com>

In the request handler of the response side, Set flow label of the
recv_wc if it is not net. It will be used for all messages sent
by the responder.

Signed-off-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/core/cm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index bbbfa77dbce7..4ab2f71da522 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -2039,6 +2039,7 @@ static int cm_req_handler(struct cm_work *work)
 	struct cm_req_msg *req_msg;
 	const struct ib_global_route *grh;
 	const struct ib_gid_attr *gid_attr;
+	struct ib_grh *ibgrh;
 	int ret;

 	req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
@@ -2048,6 +2049,12 @@ static int cm_req_handler(struct cm_work *work)
 	if (IS_ERR(cm_id_priv))
 		return PTR_ERR(cm_id_priv);

+	ibgrh = work->mad_recv_wc->recv_buf.grh;
+	if (!(be32_to_cpu(ibgrh->version_tclass_flow) & IB_GRH_FLOWLABEL_MASK))
+		ibgrh->version_tclass_flow |=
+			cpu_to_be32(IBA_GET(CM_REQ_PRIMARY_FLOW_LABEL,
+					    req_msg));
+
 	cm_id_priv->id.remote_id =
 		cpu_to_be32(IBA_GET(CM_REQ_LOCAL_COMM_ID, req_msg));
 	cm_id_priv->id.service_id =
--
2.24.1

