tools/testing/selftests/bpf/prog_tests/xdp_info.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/if_link.h>
   3 #include <test_progs.h>
   4
   5 #define IFINDEX_LO 1
   6
   7 void test_xdp_info(void)
   8 {
   9         __u32 len = sizeof(struct bpf_prog_info), duration = 0, prog_id;
  10         const char *file = "./xdp_dummy.o";
  11         struct bpf_prog_info info = {};
  12         struct bpf_object *obj;
  13         int err, prog_fd;
  14
  15         /* Get prog_id for XDP_ATTACHED_NONE mode */
  16
  17         err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, 0);
  18         if (CHECK(err, "get_xdp_none", "errno=%d\n", errno))
  19                 return;
  20         if (CHECK(prog_id, "prog_id_none", "unexpected prog_id=%u\n", prog_id))
  21                 return;
  22
  23         err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, XDP_FLAGS_SKB_MODE);
  24         if (CHECK(err, "get_xdp_none_skb", "errno=%d\n", errno))
  25                 return;
  26         if (CHECK(prog_id, "prog_id_none_skb", "unexpected prog_id=%u\n",
  27                   prog_id))
  28                 return;
  29
  30         /* Setup prog */
  31
  32         err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
  33         if (CHECK_FAIL(err))
  34                 return;
  35
  36         err = bpf_obj_get_info_by_fd(prog_fd, &info, &len);
  37         if (CHECK(err, "get_prog_info", "errno=%d\n", errno))
  38                 goto out_close;
  39
  40         err = bpf_set_link_xdp_fd(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE);
  41         if (CHECK(err, "set_xdp_skb", "errno=%d\n", errno))
  42                 goto out_close;
  43
  44         /* Get prog_id for single prog mode */
  45
  46         err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, 0);
  47         if (CHECK(err, "get_xdp", "errno=%d\n", errno))
  48                 goto out;
  49         if (CHECK(prog_id != info.id, "prog_id", "prog_id not available\n"))
  50                 goto out;
  51
  52         err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, XDP_FLAGS_SKB_MODE);
  53         if (CHECK(err, "get_xdp_skb", "errno=%d\n", errno))
  54                 goto out;
  55         if (CHECK(prog_id != info.id, "prog_id_skb", "prog_id not available\n"))
  56                 goto out;
  57
  58         err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, XDP_FLAGS_DRV_MODE);
  59         if (CHECK(err, "get_xdp_drv", "errno=%d\n", errno))
  60                 goto out;
  61         if (CHECK(prog_id, "prog_id_drv", "unexpected prog_id=%u\n", prog_id))
  62                 goto out;
  63
  64 out:
  65         bpf_set_link_xdp_fd(IFINDEX_LO, -1, 0);
  66 out_close:
  67         bpf_object__close(obj);
  68 }