Hello, I am working on XDP_REDIRECT implementation and got a query. Some of the ethernet drivers decide the xdp queue index on which xdp packet should be redirected based on smp_processor_id() in their ndo_xdp_xmit() handler, if smp_processor_id() >= total_num_xdp_queues, they decide to drop the packets and return error from the handler. I am hitting the same condition where using 8 XDP queues, I get CPU id 8 to redirect the XDP packet and I am not sure if it should be dropped or can be transmitted on a queue (= smp_processor_id() % total_num_xdp_queues) safely ?.
freescale/dpaa2 seems to be handling this case by sending the packet on the queue (= smp_processor_id() % total_num_xdp_queues) but unsure what should be the expected behavior. Regards, Manish Chopra.
