netdev - RE: [PATCH v4 1/9] rdma/cm: define native IB address

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Message-ID: <1828884A29C6694DAF28B7E6B8A8237368B99D59@ORSMSX101.amr.corp.intel.com>
Date:	Mon, 11 Feb 2013 18:02:41 +0000
From:	"Hefty, Sean" <sean.hefty@...el.com>
To:	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"David Miller (davem@...emloft.net)" <davem@...emloft.net>,
	Roland Dreier <roland@...nel.org>
Subject: RE: [PATCH v4 1/9] rdma/cm: define native IB address

> Define AF_IB and sockaddr_ib to allow the rdma_cm to use native IB
> addressing.
> 
> Signed-off-by: Sean Hefty <sean.hefty@...el.com>
> ---
>  include/linux/socket.h |    2 +
>  include/rdma/ib.h      |   89 ++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 91 insertions(+), 0 deletions(-)
>  create mode 100644 include/rdma/ib.h
> 
> diff --git a/include/linux/socket.h b/include/linux/socket.h
> index 9a546ff..17a33f7 100644
> --- a/include/linux/socket.h
> +++ b/include/linux/socket.h
> @@ -167,6 +167,7 @@ struct ucred {
>  #define AF_PPPOX	24	/* PPPoX sockets		*/
>  #define AF_WANPIPE	25	/* Wanpipe API Sockets */
>  #define AF_LLC		26	/* Linux LLC			*/
> +#define AF_IB		27	/* Native InfiniBand address	*/

...

> diff --git a/include/rdma/ib.h b/include/rdma/ib.h

...

> +struct sockaddr_ib {
> +	unsigned short int	sib_family;	/* AF_IB */
> +	__be16			sib_pkey;
> +	__be32			sib_flowinfo;
> +	struct ib_addr		sib_addr;
> +	__be64			sib_sid;
> +	__be64			sib_sid_mask;
> +	__u64			sib_scope_id;
> +};

Dave/Roland/anyone, is there any feedback on this approach?

If there's hesitation to add new address families to socket.h, I could instead use definitions local to the rdma_cm.  This has the potential to result in conflicts if the rdma_cm is expanded for other address families, though such conflicts seem unlikely.

- Sean
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