netdev - Re: [PATCH net-next 2/2] rds: Remove IPv6 dependency

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Date:   Tue, 31 Jul 2018 10:45:13 -0700
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     Ka-Cheong Poon <ka-cheong.poon@...cle.com>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, rds-devel@....oracle.com
Subject: Re: [PATCH net-next 2/2] rds: Remove IPv6 dependency

On 7/30/2018 10:48 PM, Ka-Cheong Poon wrote:
> This patch removes the IPv6 dependency from RDS.
> 
> Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@...cle.com>
> ---
>   net/rds/Kconfig          |  2 +-
>   net/rds/af_rds.c         | 32 +++++++++++++++++++-------------
>   net/rds/bind.c           |  4 +++-
>   net/rds/connection.c     | 26 ++++++++++++++++++++++++--
>   net/rds/ib.c             | 31 ++++++++++++++++++++++++++-----
>   net/rds/ib_cm.c          |  9 +++++++++
>   net/rds/ib_rdma.c        |  2 ++
>   net/rds/rdma_transport.c | 10 ++++++++++
>   net/rds/recv.c           |  2 ++
>   net/rds/send.c           |  2 ++
>   net/rds/tcp.c            | 25 +++++++++++++++++++++++++
>   net/rds/tcp_listen.c     | 21 +++++++++++++++++----
>   12 files changed, 140 insertions(+), 26 deletions(-)
> 
> diff --git a/net/rds/Kconfig b/net/rds/Kconfig
> index 4c7f259..41f7556 100644
> --- a/net/rds/Kconfig
> +++ b/net/rds/Kconfig
> @@ -1,7 +1,7 @@
>   
>   config RDS
>   	tristate "The RDS Protocol"
> -	depends on INET && IPV6
> +	depends on INET
Thanks for followup Ka-Cheong.

> diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
> index fc5c48b..65387e1 100644
> --- a/net/rds/af_rds.c
> +++ b/net/rds/af_rds.c
> @@ -156,18 +156,20 @@ static int rds_getname(struct socket *sock, struct sockaddr *uaddr,
>   				return sizeof(*sin);
>   			}
>   
> -			if (ipv6_addr_type(&rs->rs_conn_addr) &
> -			    IPV6_ADDR_MAPPED) {
> -				sin = (struct sockaddr_in *)uaddr;
> -				memset(sin, 0, sizeof(*sin));
> -				sin->sin_family = AF_INET;
> -				return sizeof(*sin);
> +#if IS_ENABLED(CONFIG_IPV6)
> +			if (!(ipv6_addr_type(&rs->rs_conn_addr) &
> +			      IPV6_ADDR_MAPPED)) {
> +				sin6 = (struct sockaddr_in6 *)uaddr;
> +				memset(sin6, 0, sizeof(*sin6));
> +				sin6->sin6_family = AF_INET6;
> +				return sizeof(*sin6);
>   			}
> +#endif
>   
I don't like this #ifdef spaghetti all over in the middle functions
but seems like that is the best option considering the involved
changes from previous series.

FWIW,
Acked-by: Santosh Shilimkar <santosh.shilimkar@...cle.com>