LXR linux/tools/testing/selftests/bpf/prog_tests/fentry

   1// SPDX-License-Identifier: GPL-2.0
   2/* Copyright (c) 2019 Facebook */
   3#include <test_progs.h>
   4#include "fentry_test.skel.h"
   5
   6static int fentry_test(struct fentry_test *fentry_skel)
   7{
   8        int err, prog_fd, i;
   9        __u32 duration = 0, retval;
  10        struct bpf_link *link;
  11        __u64 *result;
  12
  13        err = fentry_test__attach(fentry_skel);
  14        if (!ASSERT_OK(err, "fentry_attach"))
  15                return err;
  16
  17        /* Check that already linked program can't be attached again. */
  18        link = bpf_program__attach(fentry_skel->progs.test1);
  19        if (!ASSERT_ERR_PTR(link, "fentry_attach_link"))
  20                return -1;
  21
  22        prog_fd = bpf_program__fd(fentry_skel->progs.test1);
  23        err = bpf_prog_test_run(prog_fd, 1, NULL, 0,
  24                                NULL, NULL, &retval, &duration);
  25        ASSERT_OK(err, "test_run");
  26        ASSERT_EQ(retval, 0, "test_run");
  27
  28        result = (__u64 *)fentry_skel->bss;
  29        for (i = 0; i < sizeof(*fentry_skel->bss) / sizeof(__u64); i++) {
  30                if (!ASSERT_EQ(result[i], 1, "fentry_result"))
  31                        return -1;
  32        }
  33
  34        fentry_test__detach(fentry_skel);
  35
  36        /* zero results for re-attach test */
  37        memset(fentry_skel->bss, 0, sizeof(*fentry_skel->bss));
  38        return 0;
  39}
  40
  41void test_fentry_test(void)
  42{
  43        struct fentry_test *fentry_skel = NULL;
  44        int err;
  45
  46        fentry_skel = fentry_test__open_and_load();
  47        if (!ASSERT_OK_PTR(fentry_skel, "fentry_skel_load"))
  48                goto cleanup;
  49
  50        err = fentry_test(fentry_skel);
  51        if (!ASSERT_OK(err, "fentry_first_attach"))
  52                goto cleanup;
  53
  54        err = fentry_test(fentry_skel);
  55        ASSERT_OK(err, "fentry_second_attach");
  56
  57cleanup:
  58        fentry_test__destroy(fentry_skel);
  59}
  60