root/tools/testing/selftests/bpf/prog_tests/xdp.c

DEFINITIONS

1. test_xdp

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <test_progs.h>
   3 
   4 void test_xdp(void)
   5 {
   6         struct vip key4 = {.protocol = 6, .family = AF_INET};
   7         struct vip key6 = {.protocol = 6, .family = AF_INET6};
   8         struct iptnl_info value4 = {.family = AF_INET};
   9         struct iptnl_info value6 = {.family = AF_INET6};
  10         const char *file = "./test_xdp.o";
  11         struct bpf_object *obj;
  12         char buf[128];
  13         struct ipv6hdr *iph6 = (void *)buf + sizeof(struct ethhdr);
  14         struct iphdr *iph = (void *)buf + sizeof(struct ethhdr);
  15         __u32 duration, retval, size;
  16         int err, prog_fd, map_fd;
  17 
  18         err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
  19         if (CHECK_FAIL(err))
  20                 return;
  21 
  22         map_fd = bpf_find_map(__func__, obj, "vip2tnl");
  23         if (map_fd < 0)
  24                 goto out;
  25         bpf_map_update_elem(map_fd, &key4, &value4, 0);
  26         bpf_map_update_elem(map_fd, &key6, &value6, 0);
  27 
  28         err = bpf_prog_test_run(prog_fd, 1, &pkt_v4, sizeof(pkt_v4),
  29                                 buf, &size, &retval, &duration);
  30 
  31         CHECK(err || retval != XDP_TX || size != 74 ||
  32               iph->protocol != IPPROTO_IPIP, "ipv4",
  33               "err %d errno %d retval %d size %d\n",
  34               err, errno, retval, size);
  35 
  36         err = bpf_prog_test_run(prog_fd, 1, &pkt_v6, sizeof(pkt_v6),
  37                                 buf, &size, &retval, &duration);
  38         CHECK(err || retval != XDP_TX || size != 114 ||
  39               iph6->nexthdr != IPPROTO_IPV6, "ipv6",
  40               "err %d errno %d retval %d size %d\n",
  41               err, errno, retval, size);
  42 out:
  43         bpf_object__close(obj);
  44 }