netdev - Re: [PATCH net-next 1/8] net: move netdev

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Date:	Mon, 26 Aug 2013 18:41:15 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	Veaceslav Falico <vfalico@...hat.com>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Alexander Duyck <alexander.h.duyck@...el.com>,
	Cong Wang <amwang@...hat.com>
Subject: Re: [PATCH net-next 1/8] net: move netdev_upper to netdevice.h

Mon, Aug 26, 2013 at 06:28:46PM CEST, vfalico@...hat.com wrote:
>So that any device can work with it to see its upper/master devices. It is
>rcu'd and rtnl_lock protected, so one should either hold the rtnl_lock() or
>to use the _rcu() functions for it.
>
>CC: "David S. Miller" <davem@...emloft.net>
>CC: Eric Dumazet <edumazet@...gle.com>
>CC: Jiri Pirko <jiri@...nulli.us>
>CC: Alexander Duyck <alexander.h.duyck@...el.com>
>CC: Cong Wang <amwang@...hat.com>
>Signed-off-by: Veaceslav Falico <vfalico@...hat.com>
>---
> include/linux/netdevice.h |    8 ++++++++
> net/core/dev.c            |    8 --------
> 2 files changed, 8 insertions(+), 8 deletions(-)
>
>diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
>index 077363d..8cc7f43 100644
>--- a/include/linux/netdevice.h
>+++ b/include/linux/netdevice.h
>@@ -2764,6 +2764,14 @@ extern int		netdev_tstamp_prequeue;
> extern int		weight_p;
> extern int		bpf_jit_enable;
> 
>+struct netdev_upper {
>+	struct net_device *dev;
>+	bool master;
>+	struct list_head list;
>+	struct rcu_head rcu;
>+	struct list_head search_list;
>+};
>+


I like your patchset.  However I'm not entirely comfortable with exposing
this struct. I would love to have it "under control" in net/core/dev.c

I'm thinking of some getter/iterator for this use. It can work by
type as well so you would be able to remove the checks from bonding
code.

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