tools/testing/selftests/bpf/prog_tests/tc_helpers.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (c) 2023 Isovalent */
   3 #ifndef TC_HELPERS
   4 #define TC_HELPERS
   5 #include <test_progs.h>
   6
   7 #ifndef loopback
   8 # define loopback 1
   9 #endif
  10
  11 static inline __u32 id_from_prog_fd(int fd)
  12 {
  13         struct bpf_prog_info prog_info = {};
  14         __u32 prog_info_len = sizeof(prog_info);
  15         int err;
  16
  17         err = bpf_obj_get_info_by_fd(fd, &prog_info, &prog_info_len);
  18         if (!ASSERT_OK(err, "id_from_prog_fd"))
  19                 return 0;
  20
  21         ASSERT_NEQ(prog_info.id, 0, "prog_info.id");
  22         return prog_info.id;
  23 }
  24
  25 static inline __u32 id_from_link_fd(int fd)
  26 {
  27         struct bpf_link_info link_info = {};
  28         __u32 link_info_len = sizeof(link_info);
  29         int err;
  30
  31         err = bpf_link_get_info_by_fd(fd, &link_info, &link_info_len);
  32         if (!ASSERT_OK(err, "id_from_link_fd"))
  33                 return 0;
  34
  35         ASSERT_NEQ(link_info.id, 0, "link_info.id");
  36         return link_info.id;
  37 }
  38
  39 static inline __u32 ifindex_from_link_fd(int fd)
  40 {
  41         struct bpf_link_info link_info = {};
  42         __u32 link_info_len = sizeof(link_info);
  43         int err;
  44
  45         err = bpf_link_get_info_by_fd(fd, &link_info, &link_info_len);
  46         if (!ASSERT_OK(err, "id_from_link_fd"))
  47                 return 0;
  48
  49         return link_info.tcx.ifindex;
  50 }
  51
  52 static inline void __assert_mprog_count(int target, int expected, int ifindex)
  53 {
  54         __u32 count = 0, attach_flags = 0;
  55         int err;
  56
  57         err = bpf_prog_query(ifindex, target, 0, &attach_flags,
  58                              NULL, &count);
  59         ASSERT_EQ(count, expected, "count");
  60         ASSERT_EQ(err, 0, "prog_query");
  61 }
  62
  63 static inline void assert_mprog_count(int target, int expected)
  64 {
  65         __assert_mprog_count(target, expected, loopback);
  66 }
  67
  68 static inline void assert_mprog_count_ifindex(int ifindex, int target, int expected)
  69 {
  70         __assert_mprog_count(target, expected, ifindex);
  71 }
  72
  73 static inline void tc_skel_reset_all_seen(struct test_tc_link *skel)
  74 {
  75         memset(skel->bss, 0, sizeof(*skel->bss));
  76 }
  77
  78 #endif /* TC_HELPERS */