1 // SPDX-License-Identifier: GPL-2.0 2 3 /* 4 * Copyright 2020 Google LLC. 5 */ 6 7 #include <test_progs.h> 8 #include "modify_return.skel.h" 9 10 #define LOWER(x) ((x) & 0xffff) 11 #define UPPER(x) ((x) >> 16) 12 13 14 static void run_test(__u32 input_retval, __u16 want_side_effect, __s16 want_ret) 15 { 16 struct modify_return *skel = NULL; 17 int err, prog_fd; 18 __u16 side_effect; 19 __s16 ret; 20 LIBBPF_OPTS(bpf_test_run_opts, topts); 21 22 skel = modify_return__open_and_load(); 23 if (!ASSERT_OK_PTR(skel, "skel_load")) 24 goto cleanup; 25 26 err = modify_return__attach(skel); 27 if (!ASSERT_OK(err, "modify_return__attach failed")) 28 goto cleanup; 29 30 skel->bss->input_retval = input_retval; 31 prog_fd = bpf_program__fd(skel->progs.fmod_ret_test); 32 err = bpf_prog_test_run_opts(prog_fd, &topts); 33 ASSERT_OK(err, "test_run"); 34 35 side_effect = UPPER(topts.retval); 36 ret = LOWER(topts.retval); 37 38 ASSERT_EQ(ret, want_ret, "test_run ret"); 39 ASSERT_EQ(side_effect, want_side_effect, "modify_return side_effect"); 40 ASSERT_EQ(skel->bss->fentry_result, 1, "modify_return fentry_result"); 41 ASSERT_EQ(skel->bss->fexit_result, 1, "modify_return fexit_result"); 42 ASSERT_EQ(skel->bss->fmod_ret_result, 1, "modify_return fmod_ret_result"); 43 44 cleanup: 45 modify_return__destroy(skel); 46 } 47 48 /* TODO: conflict with get_func_ip_test */ 49 void serial_test_modify_return(void) 50 { 51 run_test(0 /* input_retval */, 52 1 /* want_side_effect */, 53 4 /* want_ret */); 54 run_test(-EINVAL /* input_retval */, 55 0 /* want_side_effect */, 56 -EINVAL /* want_ret */); 57 } 58