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Commit 53ae914d authored by Zhu Yanjun's avatar Zhu Yanjun Committed by David S. Miller
Browse files

net/rds: Use rdma_read_gids to get connection SGID/DGID in IPv6 



In IPv4, the newly introduced rdma_read_gids is used to read the SGID/DGID
for the connection which returns GID correctly for RoCE transport as well.

In IPv6, rdma_read_gids is also used. The following are why rdma_read_gids
is introduced.

rdma_addr_get_dgid() for RoCE for client side connections returns MAC
address, instead of DGID.
rdma_addr_get_sgid() for RoCE doesn't return correct SGID for IPv6 and
when more than one IP address is assigned to the netdevice.

So the transport agnostic rdma_read_gids() API is provided by rdma_cm
module.

Signed-off-by: default avatarZhu Yanjun <yanjun.zhu@oracle.com>
Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ad861986

net/rds/ib.c

+2 −7
Original line number Diff line number Diff line
@@ -341,15 +341,10 @@ static int rds6_ib_conn_info_visitor(struct rds_connection *conn, 


	if (rds_conn_state(conn) == RDS_CONN_UP) {

		struct rds_ib_device *rds_ibdev;

		struct rdma_dev_addr *dev_addr;



		ic = conn->c_transport_data;

		dev_addr = &ic->i_cm_id->route.addr.dev_addr;

		rdma_addr_get_sgid(dev_addr,

				   (union ib_gid *)&iinfo6->src_gid);

		rdma_addr_get_dgid(dev_addr,

		rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo6->src_gid,

			       (union ib_gid *)&iinfo6->dst_gid);



		rds_ibdev = ic->rds_ibdev;

		iinfo6->max_send_wr = ic->i_send_ring.w_nr;

		iinfo6->max_recv_wr = ic->i_recv_ring.w_nr;