Commit 53ae914d authored Aug 25, 2018 by Zhu Yanjun Committed by David S. Miller Aug 27, 2018

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: Zhu Yanjun <yanjun.zhu@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David 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;

Admin message