diff options
Diffstat (limited to '')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/modify_return.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/modify_return.c b/tools/testing/selftests/bpf/prog_tests/modify_return.c new file mode 100644 index 000000000000..5d9955af6247 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/modify_return.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Copyright 2020 Google LLC. + */ + +#include <test_progs.h> +#include "modify_return.skel.h" + +#define LOWER(x) ((x) & 0xffff) +#define UPPER(x) ((x) >> 16) + + +static void run_test(__u32 input_retval, __u16 want_side_effect, __s16 want_ret) +{ + struct modify_return *skel = NULL; + int err, prog_fd; + __u16 side_effect; + __s16 ret; + LIBBPF_OPTS(bpf_test_run_opts, topts); + + skel = modify_return__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_load")) + goto cleanup; + + err = modify_return__attach(skel); + if (!ASSERT_OK(err, "modify_return__attach failed")) + goto cleanup; + + skel->bss->input_retval = input_retval; + prog_fd = bpf_program__fd(skel->progs.fmod_ret_test); + err = bpf_prog_test_run_opts(prog_fd, &topts); + ASSERT_OK(err, "test_run"); + + side_effect = UPPER(topts.retval); + ret = LOWER(topts.retval); + + ASSERT_EQ(ret, want_ret, "test_run ret"); + ASSERT_EQ(side_effect, want_side_effect, "modify_return side_effect"); + ASSERT_EQ(skel->bss->fentry_result, 1, "modify_return fentry_result"); + ASSERT_EQ(skel->bss->fexit_result, 1, "modify_return fexit_result"); + ASSERT_EQ(skel->bss->fmod_ret_result, 1, "modify_return fmod_ret_result"); + +cleanup: + modify_return__destroy(skel); +} + +/* TODO: conflict with get_func_ip_test */ +void serial_test_modify_return(void) +{ + run_test(0 /* input_retval */, + 1 /* want_side_effect */, + 4 /* want_ret */); + run_test(-EINVAL /* input_retval */, + 0 /* want_side_effect */, + -EINVAL /* want_ret */); +} |