netdev - Re: [RFC Patch] bonding: move to net/ directory

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Message-ID: <BANLkTikrsr5sZ4aZ5aEmfBSvPE0mEL8g0g@mail.gmail.com>
Date:	Thu, 26 May 2011 16:25:16 +0200
From:	Michał Mirosław <mirqus@...il.com>
To:	Neil Horman <nhorman@...driver.com>
Cc:	Américo Wang <xiyou.wangcong@...il.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Jay Vosburgh <fubar@...ibm.com>
Subject: Re: [RFC Patch] bonding: move to net/ directory

2011/5/26 Neil Horman <nhorman@...driver.com>:
> On Thu, May 26, 2011 at 05:32:08PM +0800, Américo Wang wrote:
>> I don't think other drivers are supposed to use this function to register
>> a packet handler, which is an important difference from my view.
> Note you just referred to the bridge/bond and vlan code as 'drivers' :).  And
> why is that function the gating factor?  Why not register_netdev?  or
> netif_receive_skb or dev_add_pack?  They all relate to the creation of device
> interface and the reception of network data.
>
> The fact is, bonding/bridging/vlans/tunnels/etc all have aspects that
> make them more than just drivers.  They are where they are for a myrriad of
> reasons.  Moving them around changes their location, but does _nothing_ about
> the underlying fact that they're driver code plus other stuff, and as such
> provides no real advantage in terms of organization.

If you want to draw a line between net/ and drivers/net I propose
following idea:

net/ - everything that is about networking (or library for it) and
interacts only within the system (kernel<->user, or in-kernel)
drivers/net/ - everything that is a connecting point between the
system and external world - be it hardware, other VMs or hypervisor.

net/ would include wireless stack, all kinds of loopback devices,
tunnels (incl. vlan), bridging, bonding, tuntap, etc.
drivers/net/ would keep only what is hardware or external ABI dependent

Just my 2 cents (3 grosze ;-).

Best Regards,
Michał Mirosław
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