Hello,l2fwd mode of xdpsock sample puts a packet back into the same interface. Is there a good example how xdpsock can be modified to read a packet from one interface and to send it to another?
I've failed to find such example and created my own app https://github.com/ilejn/xdpbridge.
Do hope that such a thing already exists.If not, I appreciate if anyone can review the code of my application. In particular I am concerned about the ENOSPC case in xq_enq_copy.
Basically the thing works Ok, but not as fast as I expected.I've tried to share umem to get rid of memcpy, but bind returns EINVAL in this case. Exploring xsk_bind (net/xdp/xsk.c) in 4.18 kernel I can see, that there is an explicit check umem_xs->dev != dev . Is it a fundamental limitaion?
Thanks. -- Regards, Ilya Golshtein
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