From: Gaofeng <gaofeng@cn.fujitsu.com>
To: christoph.paasch@uclouvain.be
Cc: netdev@vger.kernel.org
Subject: Re: pskb_copy() in tcp_transmit_skb()
Date: Tue, 13 Sep 2011 17:29:25 +0800 [thread overview]
Message-ID: <4E6F2275.2050902@cn.fujitsu.com> (raw)
In-Reply-To: <201109131221.37561.christoph.paasch@uclouvain.be>
于 2011年09月13日 17:21, Christoph Paasch 写道:
> Hi,
>
> I'm trying to understand the reason for the possible call to pskb_copy() in
> tcp_transmit_skb().
> I don't find, where we may have a cloned skb entering tcp_transmit_skb().
>
> The original pskb_copy() came from tcp_retransmit_skb() (commit
> dfb4b9dceb35c567a595ae5e9d035cfda044a103).
> But from that point, the git-history does not show where the pskb_copy() is
> coming from.
>
>
> Does somebody has an idea, how a cloned skb can be passed to
> tcp_transmit_skb() and thus trigger this call to pskb_copy().
>
>
> Thanks for your help,
> Christoph
>
>
> --
> Christoph Paasch
> PhD Student
>
> IP Networking Lab --- http://inl.info.ucl.ac.be
> MultiPath TCP in the Linux Kernel --- http://inl.info.ucl.ac.be/mptcp
> Université Catholique de Louvain
>
> www.rollerbulls.be
> --
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
maybe nat,nat can change the tcp packet header
next prev parent reply other threads:[~2011-09-13 9:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-13 9:21 pskb_copy() in tcp_transmit_skb() Christoph Paasch
2011-09-13 9:29 ` Gaofeng [this message]
2011-09-13 10:55 ` Christoph Paasch
2011-09-13 12:00 ` Gao feng
2011-09-13 12:02 ` Eric Dumazet
2011-09-13 12:41 ` Christoph Paasch
2011-09-13 12:51 ` Eric Dumazet
2011-09-13 16:34 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4E6F2275.2050902@cn.fujitsu.com \
--to=gaofeng@cn.fujitsu.com \
--cc=christoph.paasch@uclouvain.be \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.