On Tue, 10 Oct 2017 12:58:51 +0530 Christina Jacob
<christina.jacob.koik...@gmail.com> wrote:
> The patch below implements port to port forwarding through route table and arp
> table lookup for ipv4 packets using bpf_redirect helper function and lpm_trie
> map. This has an improved performance over the normal kernel stack ip
> forward.
>
> Implementation details.
> -----------------------
[...]
>
> In the xdp3_user.c,
>
[...]
>
> In the xdp3_kern.c,
You forgot to update the program name in the cover letter.
> The array map for the 32 bit mask entries checked to see if there is a key
> that
> exactly matches with the destination ip. If it has a non zero destination mac
> entry then the xdp data is updated accordingly Otherwise a proper route and
> arp table lookup is done using the lpm_trie and the arp table array map.
>
> Usage: as ./xdp3 -S <ifindex1...ifindexn> (-S for
^^^^^
The executable name also changed.
> generic xdp implementation ifindex- the index of the interface to which
> the xdp program has to be attached.) in 4.14-rc3 kernel.
>
> Changes from v1 to v2
> ---------------------
>
> * As suggested by Jesper Dangaard Brouer
> 1. Changed the program name to list xdp_router_ipv4
Thanks
> 2. Changed the commandline arguments from ifindex list to interface name
> Usage : ./xdp_router_ipv4 [-S] <interface name list>
> -S for generic xdp implementation
> -interface name list is the list of interfaces to which
> the xdp program should attach to
Okay, you choose a slightly different way of implementing this, but it
shouldn't matter.
I'll try to test/benchmark your program...
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
