net/rds: Use rdma_read_gids to get connection SGID/DGID in IPv6
authorZhu Yanjun <yanjun.zhu@oracle.com>
Sat, 25 Aug 2018 07:19:05 +0000 (15:19 +0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 27 Aug 2018 22:26:01 +0000 (15:26 -0700)
commit53ae914d898e5dd5984d352d5fa0b23410f966a0
treef2d12b347e85beb8831f8e5a56ba4c2bdbdf1389
parentad8619864f0c9bd89e14d957afa3fd8aaf0720da
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>
net/rds/ib.c