netdev - Re: [Lxc-users] Bad checksums and lost packets with macvlan on dummy

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:	Thu, 3 Mar 2011 22:30:08 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Daniel Lezcano <daniel.lezcano@...e.fr>
Cc:	Patrick McHardy <kaber@...sh.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Andrian Nord <nightnord@...il.com>,
	lxc-users@...ts.sourceforge.net,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: [Lxc-users] Bad checksums and lost packets with macvlan on dummy

On Thu, Mar 3, 2011 at 2:33 AM, Daniel Lezcano <daniel.lezcano@...e.fr> wrote:
>
> One last question. In the case of broadcast packets with maclvan in bridge
> mode.
> We will have the packets going through each macvlan port and also to the
> lower-device, right ?
> For the latter, don't we have a problem if the packet is flagged
> CHECKSUM_UNNECESSARY ?
>
> Shouldn't we restore the ip_summed field before sending through
> dev_queue_xmit ?
>
> ---
>  drivers/net/macvlan.c |    3 +++
>  1 file changed, 3 insertions(+)
>
> Index: linux-next/drivers/net/macvlan.c
> ===================================================================
> --- linux-next.orig/drivers/net/macvlan.c
> +++ linux-next/drivers/net/macvlan.c
> @@ -222,10 +222,13 @@ static int macvlan_queue_xmit(struct sk_
>
>        if (vlan->mode == MACVLAN_MODE_BRIDGE) {
>                const struct ethhdr *eth = (void *)skb->data;
> +               __u8 ip_summed = skb->ip_summed;
> +               skb->ip_summed; = CHECKSUM_UNNECESSARY;

You added a additional ";".


-- 
Regards,
Changli Gao(xiaosuo@...il.com)
--
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