tools/testing/selftests/bpf/progs/test_xdp_bpf2bpf.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/bpf.h>
   3 #include <bpf/bpf_helpers.h>
   4 #include "bpf_trace_helpers.h"
   5
   6 struct net_device {
   7         /* Structure does not need to contain all entries,
   8          * as "preserve_access_index" will use BTF to fix this...
   9          */
  10         int ifindex;
  11 } __attribute__((preserve_access_index));
  12
  13 struct xdp_rxq_info {
  14         /* Structure does not need to contain all entries,
  15          * as "preserve_access_index" will use BTF to fix this...
  16          */
  17         struct net_device *dev;
  18         __u32 queue_index;
  19 } __attribute__((preserve_access_index));
  20
  21 struct xdp_buff {
  22         void *data;
  23         void *data_end;
  24         void *data_meta;
  25         void *data_hard_start;
  26         unsigned long handle;
  27         struct xdp_rxq_info *rxq;
  28 } __attribute__((preserve_access_index));
  29
  30 __u64 test_result_fentry = 0;
  31 SEC("fentry/_xdp_tx_iptunnel")
  32 int BPF_PROG(trace_on_entry, struct xdp_buff *xdp)
  33 {
  34         test_result_fentry = xdp->rxq->dev->ifindex;
  35         return 0;
  36 }
  37
  38 __u64 test_result_fexit = 0;
  39 SEC("fexit/_xdp_tx_iptunnel")
  40 int BPF_PROG(trace_on_exit, struct xdp_buff *xdp, int ret)
  41 {
  42         test_result_fexit = ret;
  43         return 0;
  44 }