netdev - Re: [PATCH -next 2/3] net: sched: remove AT INGRESS/EGRESS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 15 May 2015 13:09:45 -0700
From:	Alexei Starovoitov <alexei.starovoitov@...il.com>
To:	Florian Westphal <fw@...len.de>
Cc:	netdev@...r.kernel.org, jhs@...atatu.com, daniel@...earbox.net
Subject: Re: [PATCH -next 2/3] net: sched: remove AT INGRESS/EGRESS

On Fri, May 15, 2015 at 07:21:15PM +0200, Florian Westphal wrote:
> So, from ifb point of view it makes no difference, G_TC_FROM+AT_STACK
> causes skb to be dropped and IFB doesn't care about G_TC_AT() at all.

yes. your change is technically correct. It's not causing ifb regression,
but it removes information in a way that will be very hard to add it later.

> AT_STACK cannot even happen for the G_TC_AT case from looking at the
> code since dev_queue_xmit forces AT_EGRESS & rx sets AT_INGRESS.

yes, if we only consider ingress and egress hooks.
I want to use this stack/ingress/egress indication with socket filters.
If we make stack==egress, I would need to refactor this code all over again.
It's not broken today. You're doing this aliasing only two squeeze a bit.
That's why I'm saying keep the stack/ingress/egress flag as-is. It's useful.

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html