From: David Miller <davem@davemloft.net>
To: daniel.lezcano@free.fr
Cc: eric.dumazet@gmail.com, kaber@trash.net, nightnord@gmail.com,
netdev@vger.kernel.org
Subject: Re: [PATCH][v3] dev : fix mtu check when TSO is enabled
Date: Mon, 14 Mar 2011 16:59:29 -0700 (PDT) [thread overview]
Message-ID: <20110314.165929.232913682.davem@davemloft.net> (raw)
In-Reply-To: <1300135190-14093-1-git-send-email-daniel.lezcano@free.fr>
From: Daniel Lezcano <daniel.lezcano@free.fr>
Date: Mon, 14 Mar 2011 21:39:50 +0100
> + len = dev->mtu + dev->hard_header_len + VLAN_HLEN;
> + if (skb->len < len)
> + return true;
This is not a correct translation of the original test:
> - (skb->len > (dev->mtu + dev->hard_header_len + VLAN_HLEN)))) {
You need to use "<=" in your version, which currently rejects all
full sized frames. :-)
> +
> + /* if TSO is enabled, we don't care about the length as the packet
> + * could be forwarded without being segmented before
> + */
> + if (skb->dev && skb->dev->features & NETIF_F_TSO)
> + return true;
I am trying to understand why you aren't simply checking also if this
is a segmented frame? Perhaps skb_is_gso() && device has NETIF_F_TSO
set?
next prev parent reply other threads:[~2011-03-14 23:58 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-14 20:39 [PATCH][v3] dev : fix mtu check when TSO is enabled Daniel Lezcano
2011-03-14 23:59 ` David Miller [this message]
2011-03-15 13:57 ` Daniel Lezcano
2011-03-15 18:17 ` Stephen Hemminger
2011-03-16 13:56 ` Daniel Lezcano
2011-03-16 15:35 ` Stephen Hemminger
2011-03-16 16:19 ` Daniel Lezcano
2011-03-16 16:45 ` Stephen Hemminger
2011-03-21 22:58 ` Eric W. Biederman
2011-03-22 2:31 ` Jesse Gross
2011-03-22 3:02 ` Eric W. Biederman
2011-03-22 0:05 ` Michał Mirosław
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