netdev - Re: [PATCH net v2 1/1] net: batman-adv: Treat NET_XMIT

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: <CA+6hz4rVCL2oxeQUojcqptNfcZdtLZdgEA2_j7iU1-B=s12SHg@mail.gmail.com>
Date:   Mon, 21 Nov 2016 21:24:37 +0800
From:   Gao Feng <fgao@...ai8.com>
To:     Florian Westphal <fw@...len.de>
Cc:     mareklindner@...mailbox.ch,
        Simon Wunderlich <sw@...onwunderlich.de>, a@...table.cc,
        "David S. Miller" <davem@...emloft.net>,
        b.a.t.m.a.n@...ts.open-mesh.org,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH net v2 1/1] net: batman-adv: Treat NET_XMIT_CN as transmit successfully

Hi Florian,

On Mon, Nov 21, 2016 at 7:09 PM, Florian Westphal <fw@...len.de> wrote:
> fgao@...ai8.com <fgao@...ai8.com> wrote:
>> From: Gao Feng <fgao@...ai8.com>
>>
>> The tc could return NET_XMIT_CN as one congestion notification, but
>> it does not mean the packet is lost. Other modules like ipvlan,
>> macvlan, and others treat NET_XMIT_CN as success too.
>>
>> So batman-adv should add the NET_XMIT_CN check.
>
> "The tc could return NET_XMIT_CN as one congestion notification, but
> it means another packet got dropped. Other modules like batman do not
> treat NET_XMIT_CN as success, so modules like ipvlan, macvlan, ..
> should ignore it as well."
>
> What I am asking is:
> Are you sure adding NET_XMIT_CN handling everywhere is the right way to
> resolve the inconsistency?

Or create one new macro to handle this case like net_xmit_eval.
For example,
#define net_xmit_ok(ret)    (ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)

Is it ok? But it should be done for net-next.

Best Regards
Feng