bpf/prog_tests/fentry_test.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /* Copyright (c) 2019 Facebook */
0003 #include <test_progs.h>
0004 #include "fentry_test.lskel.h"
0005
0006 static int fentry_test(struct fentry_test_lskel *fentry_skel)
0007 {
0008     int err, prog_fd, i;
0009     int link_fd;
0010     __u64 *result;
0011     LIBBPF_OPTS(bpf_test_run_opts, topts);
0012
0013     err = fentry_test_lskel__attach(fentry_skel);
0014     if (!ASSERT_OK(err, "fentry_attach"))
0015         return err;
0016
0017     /* Check that already linked program can't be attached again. */
0018     link_fd = fentry_test_lskel__test1__attach(fentry_skel);
0019     if (!ASSERT_LT(link_fd, 0, "fentry_attach_link"))
0020         return -1;
0021
0022     prog_fd = fentry_skel->progs.test1.prog_fd;
0023     err = bpf_prog_test_run_opts(prog_fd, &topts);
0024     ASSERT_OK(err, "test_run");
0025     ASSERT_EQ(topts.retval, 0, "test_run");
0026
0027     result = (__u64 *)fentry_skel->bss;
0028     for (i = 0; i < sizeof(*fentry_skel->bss) / sizeof(__u64); i++) {
0029         if (!ASSERT_EQ(result[i], 1, "fentry_result"))
0030             return -1;
0031     }
0032
0033     fentry_test_lskel__detach(fentry_skel);
0034
0035     /* zero results for re-attach test */
0036     memset(fentry_skel->bss, 0, sizeof(*fentry_skel->bss));
0037     return 0;
0038 }
0039
0040 void test_fentry_test(void)
0041 {
0042     struct fentry_test_lskel *fentry_skel = NULL;
0043     int err;
0044
0045     fentry_skel = fentry_test_lskel__open_and_load();
0046     if (!ASSERT_OK_PTR(fentry_skel, "fentry_skel_load"))
0047         goto cleanup;
0048
0049     err = fentry_test(fentry_skel);
0050     if (!ASSERT_OK(err, "fentry_first_attach"))
0051         goto cleanup;
0052
0053     err = fentry_test(fentry_skel);
0054     ASSERT_OK(err, "fentry_second_attach");
0055
0056 cleanup:
0057     fentry_test_lskel__destroy(fentry_skel);
0058 }