Re: usesrc clientip not working with linux kernel version >= 3.0.0

Hi,

Le mercredi 28 septembre 2011 13:31:01, Yang Zhe a écrit :
> After upgrading to linux kernel 3.0.0, my haproxy stopped working.
>
> By using debug option, I find that transparent with usesrc client
> stopped working. It alters:
>
> [ALERT]: Cannot bind to source address before connect() for
> proxy %s. Aborting.
>
> It worked correctly when I was using kernel 2.6.29. So that I checked
> into source code, and find that in src/proto_tcp.c:141,
> bind() returned 97 (EAFNOSUPPORT). I can't understand why it failed
> after successfully setsockopt(..., IP_TRANSPARENT, ...).
>
> Since perror says "Address family not supported", I find that after
> memset() bind_addr to 0 at src/proto_tcp.c:132, bind_addr.sin_family
> is uninitialized. After I add bind_addr.sin_family = AF_INET; below
> memset(), recompile haproxy then it works again.
>
> -- System Information:
> Debian Release: wheezy/sid
> APT prefers unstable
> APT policy: (500, 'unstable'), (101, 'experimental')
> Architecture: i386 (i686)
>
> Kernel: Linux 3.0.0-1-686-pae (SMP w/2 CPU cores)

I encountered a similar issue with httperf nearly 1 month ago. I may be wrong for your case but I think it's due to a regression which appeared in kernel 2.6.39.3 and later.

Kernel bugzilla is down right now but the bug is referenced here : https://bugzilla.kernel.org/show_bug.cgi?id=42012

From the netdev archive, a patch has been proposed to fix the regression : http://www.spinics.net/lists/netdev/msg173766.html

-- 
Cyril Bonté