netdev - Re: [PATCH v4 2/5] can: add rtnetlink support

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Message-ID: <4DBD9586.7080908@hartkopp.net>
Date:	Sun, 01 May 2011 19:16:54 +0200
From:	Oliver Hartkopp <socketcan@...tkopp.net>
To:	Kurt Van Dijck <kurt.van.dijck@....be>
CC:	socketcan-core@...ts.berlios.de, netdev@...r.kernel.org
Subject: Re: [PATCH v4 2/5] can: add rtnetlink support

On 27.04.2011 10:57, Kurt Van Dijck wrote:
> This patch adds rtnetlink support for AF_CAN. This support is really
> a multiplexer towards the different CAN protocols.

Hello Kurt,

i applied all your patches for the can-utils and the network layer stuff to
the BerliOS SVN in socketcan/branches/j1939 for testing.

Besides some minor adaptions to support the SVN i left out some infrastructure
changes you made in patch 2/5 to constify this ...

> -static struct can_proto *proto_tab[CAN_NPROTO] __read_mostly;
> +static const struct can_proto *proto_tab[CAN_NPROTO] __read_mostly;

and this ...

> -static struct can_proto *can_try_module_get(int protocol)
> +static const struct can_proto *can_try_module_get(int protocol)

(..)

> +static inline void can_put_proto(const struct can_proto *cp)
> +{
> +	module_put(cp->prot->owner);
> +}

These infrastructure changes did not really belong to the rtnetlink support.

The can-j1939.ko builds properly in the SVN against 2.6.39-rc5 and the
net-next-2.6 tree - and e.g. against a debian wheezy kernel:

make KERNELDIR=/usr/src/linux-headers-2.6.38-2-686-bigmem

As it is pretty easy now to build the kernel modules & your provided can-utils
we hopefully get some more feedback from j1939 users.

Best regards,
Oliver
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