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From: Felix Fietkau <nbd@openwrt.org>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Krishna Chaitanya <chaitanya.mgit@gmail.com>,
	linux-wireless <linux-wireless@vger.kernel.org>,
	Sebastian Gottschall <s.gottschall@dd-wrt.com>,
	Johannes Berg <johannes@sipsolutions.net>,
	netdev <netdev@vger.kernel.org>
Subject: Re: Regression in 3.9 caused by "bridge: respect RFC2863 operational state"
Date: Wed, 01 May 2013 23:06:16 +0200	[thread overview]
Message-ID: <518183C8.8050606@openwrt.org> (raw)
In-Reply-To: <CAOaVG179Rx_JfV99mbjWhwQTALb5gh+2_WVFWDSbngA0qkzoGw@mail.gmail.com>

On 2013-05-01 10:21 PM, Stephen Hemminger wrote:
> What about using AF_PACKET bound to underlying wireless device and the
> packet type. You can even use BPF to filter.
As far as I know, AF_PACKET only works when not binding it to the packet
type (otherwise it get stolen by the rx handler).
Not binding it to the packet type and using BPF to filter is expensive
on small embedded devices with small caches. Still, this requires
userspace changes, so we need a different solution.

> Another alternative would be to have bridge accept control frames on
> dormant device but not send.
Sounds good, will you send a patch for that?

- Felix


WARNING: multiple messages have this Message-ID (diff)
From: Felix Fietkau <nbd-p3rKhJxN3npAfugRpC6u6w@public.gmane.org>
To: Stephen Hemminger
	<stephen-OTpzqLSitTUnbdJkjeBofR2eb7JE58TQ@public.gmane.org>
Cc: Krishna Chaitanya
	<chaitanya.mgit-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	linux-wireless
	<linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Sebastian Gottschall
	<s.gottschall-t37Kgv3TaIPQT0dZR+AlfA@public.gmane.org>,
	Johannes Berg <johannes-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>,
	netdev <netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: Regression in 3.9 caused by "bridge: respect RFC2863 operational state"
Date: Wed, 01 May 2013 23:06:16 +0200	[thread overview]
Message-ID: <518183C8.8050606@openwrt.org> (raw)
In-Reply-To: <CAOaVG179Rx_JfV99mbjWhwQTALb5gh+2_WVFWDSbngA0qkzoGw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

On 2013-05-01 10:21 PM, Stephen Hemminger wrote:
> What about using AF_PACKET bound to underlying wireless device and the
> packet type. You can even use BPF to filter.
As far as I know, AF_PACKET only works when not binding it to the packet
type (otherwise it get stolen by the rx handler).
Not binding it to the packet type and using BPF to filter is expensive
on small embedded devices with small caches. Still, this requires
userspace changes, so we need a different solution.

> Another alternative would be to have bridge accept control frames on
> dormant device but not send.
Sounds good, will you send a patch for that?

- Felix

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  parent reply	other threads:[~2013-05-01 21:06 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-01 19:02 Regression in 3.9 caused by "bridge: respect RFC2863 operational state" Felix Fietkau
2013-05-01 19:49 ` Krishna Chaitanya
2013-05-01 19:49   ` Krishna Chaitanya
     [not found]   ` <CAOaVG179Rx_JfV99mbjWhwQTALb5gh+2_WVFWDSbngA0qkzoGw@mail.gmail.com>
2013-05-01 21:06     ` Felix Fietkau [this message]
2013-05-01 21:06       ` Felix Fietkau
2013-05-01 22:49       ` Stephen Hemminger
2013-05-01 22:49         ` Stephen Hemminger
2013-05-02  0:53         ` Felix Fietkau
2013-05-02  0:53           ` Felix Fietkau
     [not found] <CAFuUQkhHsRZMnNYBbVZU0=BcAKMEktzYgPv6oc=CMFd7MFDi6g@mail.gmail.com>
2015-12-04  2:31 ` YanBo
2016-01-19 15:45   ` Shajakhan, Mohammed Shafi (Mohammed Shafi)
2016-01-19 15:45     ` Shajakhan, Mohammed Shafi (Mohammed Shafi)
2016-01-19 21:10     ` YanBo
2016-01-19 21:10       ` YanBo
2016-01-19 21:48 ` Stephen Hemminger
2016-01-19 21:48   ` Stephen Hemminger
2016-01-19 21:55   ` Felix Fietkau
2016-01-19 21:55     ` Felix Fietkau

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