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