1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2019 Facebook */ 3 #include <test_progs.h> 4 #include "fentry_test.lskel.h" 5 #include "fentry_many_args.skel.h" 6 7 static int fentry_test_common(struct fentry_test_lskel *fentry_skel) 8 { 9 int err, prog_fd, i; 10 int link_fd; 11 __u64 *result; 12 LIBBPF_OPTS(bpf_test_run_opts, topts); 13 14 err = fentry_test_lskel__attach(fentry_skel); 15 if (!ASSERT_OK(err, "fentry_attach")) 16 return err; 17 18 /* Check that already linked program can't be attached again. */ 19 link_fd = fentry_test_lskel__test1__attach(fentry_skel); 20 if (!ASSERT_LT(link_fd, 0, "fentry_attach_link")) 21 return -1; 22 23 prog_fd = fentry_skel->progs.test1.prog_fd; 24 err = bpf_prog_test_run_opts(prog_fd, &topts); 25 ASSERT_OK(err, "test_run"); 26 ASSERT_EQ(topts.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_lskel__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 41 static void fentry_test(void) 42 { 43 struct fentry_test_lskel *fentry_skel = NULL; 44 int err; 45 46 fentry_skel = fentry_test_lskel__open_and_load(); 47 if (!ASSERT_OK_PTR(fentry_skel, "fentry_skel_load")) 48 goto cleanup; 49 50 err = fentry_test_common(fentry_skel); 51 if (!ASSERT_OK(err, "fentry_first_attach")) 52 goto cleanup; 53 54 err = fentry_test_common(fentry_skel); 55 ASSERT_OK(err, "fentry_second_attach"); 56 57 cleanup: 58 fentry_test_lskel__destroy(fentry_skel); 59 } 60 61 static void fentry_many_args(void) 62 { 63 struct fentry_many_args *fentry_skel = NULL; 64 int err; 65 66 fentry_skel = fentry_many_args__open_and_load(); 67 if (!ASSERT_OK_PTR(fentry_skel, "fentry_many_args_skel_load")) 68 goto cleanup; 69 70 err = fentry_many_args__attach(fentry_skel); 71 if (!ASSERT_OK(err, "fentry_many_args_attach")) 72 goto cleanup; 73 74 ASSERT_OK(trigger_module_test_read(1), "trigger_read"); 75 76 ASSERT_EQ(fentry_skel->bss->test1_result, 1, 77 "fentry_many_args_result1"); 78 ASSERT_EQ(fentry_skel->bss->test2_result, 1, 79 "fentry_many_args_result2"); 80 ASSERT_EQ(fentry_skel->bss->test3_result, 1, 81 "fentry_many_args_result3"); 82 83 cleanup: 84 fentry_many_args__destroy(fentry_skel); 85 } 86 87 void test_fentry_test(void) 88 { 89 if (test__start_subtest("fentry")) 90 fentry_test(); 91 if (test__start_subtest("fentry_many_args")) 92 fentry_many_args(); 93 } 94