ceph/src/seastar/dpdk/examples/bpf/t2.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Intel Corporation
   3  */
   4
   5 /*
   6  * eBPF program sample.
   7  * Accepts pointer to struct rte_mbuf as an input parameter.
   8  * cleanup mbuf's vlan_tci and all related RX flags
   9  * (PKT_RX_VLAN_PKT | PKT_RX_VLAN_STRIPPED).
  10  * Doesn't touch contents of packet data.
  11  * To compile:
  12  * clang -O2 -I${RTE_SDK}/${RTE_TARGET}/include \
  13  * -target bpf -Wno-int-to-void-pointer-cast -c t2.c
  14  */
  15
  16 #include <stdint.h>
  17 #include <stddef.h>
  18 #include <rte_config.h>
  19 #include "mbuf.h"
  20
  21 uint64_t
  22 entry(void *pkt)
  23 {
  24         struct rte_mbuf *mb;
  25
  26         mb = pkt;
  27         mb->vlan_tci = 0;
  28         mb->ol_flags &= ~(PKT_RX_VLAN_PKT | PKT_RX_VLAN_STRIPPED);
  29
  30         return 1;
  31 }