netdev - Re: [Xen-devel] [PATCHv1 net-next] xen-netback: remove unconditional pull_skb

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]

Message-Id: <20141105.121511.887564988610007845.davem@davemloft.net>
Date:	Wed, 05 Nov 2014 12:15:11 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	Ian.Campbell@...rix.com
Cc:	zoltan.kiss@...aro.org, david.vrabel@...rix.com,
	netdev@...r.kernel.org, malcolm.crossley@...rix.com,
	wei.liu2@...rix.com, xen-devel@...ts.xenproject.org
Subject: Re: [Xen-devel] [PATCHv1 net-next] xen-netback: remove
 unconditional pull_skb_tail in guest Tx path

From: Ian Campbell <Ian.Campbell@...rix.com>
Date: Wed, 5 Nov 2014 09:51:20 +0000

> Is this also true for things which hit the iptables paths? I suppose
> they must necessarily have already been through the protocol demux stage
> before iptables would even be able to interpret them as e.g. an IP
> packet.

Netfilter often takes a different approach, by using
skb_header_pointer() which returns a direct pointer if the linear area
contains the requested range already, or alternatively copies from the
frags into a user supplied on-stack header buffer if not.
--
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