netdev - Re: [PATCH 1/1] net/rds: Use rdma_read_gids to get connection SGID/DGID in IPv6

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Message-Id: <20180827.152619.1765710083731716396.davem@davemloft.net>
Date:   Mon, 27 Aug 2018 15:26:19 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     yanjun.zhu@...cle.com
Cc:     santosh.shilimkar@...cle.com, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, rds-devel@....oracle.com
Subject: Re: [PATCH 1/1] net/rds: Use rdma_read_gids to get connection
 SGID/DGID in IPv6

From: Zhu Yanjun <yanjun.zhu@...cle.com>
Date: Sat, 25 Aug 2018 15:19:05 +0800

> 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@...cle.com>

Applied.