netdev - [PATCH v2 net-next] Re: can't add tc multiq

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Date:	Tue, 10 Feb 2009 07:41:54 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	Stephen Hemminger <shemminger@...tta.com>,
	Badalian Vyacheslav <slavon@...telecom.ru>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH v2 net-next] Re: can't add tc multiq

On Mon, Feb 09, 2009 at 02:40:52PM -0800, Stephen Hemminger wrote:
...
> Rather than warning which will buried off on some console that user will never
> see (and can cause DoS overload). A better errno should be chosen.

I think admins are used to reading console messages, but we can try
with a better errno too.

Thanks,
Jarek P.
-------------------> take 2

pkt_sched: sch_multiq: Change errno on non-multiqueue devices use.

Current "RTNETLINK answers: Invalid argument" warning, while trying to
add multiq qdisc to non-multiqueue device, isn't very helpful and some
of these devs can be changed btw., so let's use a better errno.

With feedback from Stephen Hemminger <shemminger@...tta.com>

Reported-by: Badalian Vyacheslav <slavon@...telecom.ru>
Signed-off-by: Jarek Poplawski <jarkao2@...il.com>
---

 net/sched/sch_multiq.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/sched/sch_multiq.c b/net/sched/sch_multiq.c
index 7e15186..9127312 100644
--- a/net/sched/sch_multiq.c
+++ b/net/sched/sch_multiq.c
@@ -202,7 +202,7 @@ static int multiq_tune(struct Qdisc *sch, struct nlattr *opt)
 	int i;
 
 	if (!netif_is_multiqueue(qdisc_dev(sch)))
-		return -EINVAL;
+		return -EOPNOTSUPP;
 	if (nla_len(opt) < sizeof(*qopt))
 		return -EINVAL;
 
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