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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2026 Meta Platforms, Inc. and affiliates. */
#include <test_progs.h>
#include <network_helpers.h>
#include "stack_arg.skel.h"
#include "stack_arg_kfunc.skel.h"
static void run_subtest(struct bpf_program *prog, int expected)
{
int err, prog_fd;
LIBBPF_OPTS(bpf_test_run_opts, topts,
.data_in = &pkt_v4,
.data_size_in = sizeof(pkt_v4),
.repeat = 1,
);
prog_fd = bpf_program__fd(prog);
err = bpf_prog_test_run_opts(prog_fd, &topts);
ASSERT_OK(err, "test_run");
ASSERT_EQ(topts.retval, expected, "retval");
}
static void test_global_many(void)
{
struct stack_arg *skel;
skel = stack_arg__open();
if (!ASSERT_OK_PTR(skel, "open"))
return;
if (!skel->rodata->has_stack_arg) {
test__skip();
goto out;
}
if (!ASSERT_OK(stack_arg__load(skel), "load"))
goto out;
run_subtest(skel->progs.test_global_many_args, 55);
out:
stack_arg__destroy(skel);
}
static void test_async_cb_many(void)
{
struct stack_arg *skel;
skel = stack_arg__open();
if (!ASSERT_OK_PTR(skel, "open"))
return;
if (!skel->rodata->has_stack_arg) {
test__skip();
goto out;
}
if (!ASSERT_OK(stack_arg__load(skel), "load"))
goto out;
run_subtest(skel->progs.test_async_cb_many_args, 0);
/* Wait for the timer callback to fire and verify the result.
* 10+20+30+40+50+60+70+80+90+100 = 550
*/
usleep(50);
ASSERT_EQ(skel->bss->timer_result, 550, "timer_result");
out:
stack_arg__destroy(skel);
}
static void test_bpf2bpf(void)
{
struct stack_arg *skel;
skel = stack_arg__open();
if (!ASSERT_OK_PTR(skel, "open"))
return;
if (!skel->rodata->has_stack_arg) {
test__skip();
goto out;
}
if (!ASSERT_OK(stack_arg__load(skel), "load"))
goto out;
run_subtest(skel->progs.test_bpf2bpf_ptr_stack_arg, 75);
run_subtest(skel->progs.test_bpf2bpf_mix_stack_args, 66);
run_subtest(skel->progs.test_bpf2bpf_nesting_stack_arg, 84);
run_subtest(skel->progs.test_bpf2bpf_dynptr_stack_arg, 99);
run_subtest(skel->progs.test_two_callees, 133);
out:
stack_arg__destroy(skel);
}
static void test_kfunc(void)
{
struct stack_arg_kfunc *skel;
skel = stack_arg_kfunc__open();
if (!ASSERT_OK_PTR(skel, "open"))
return;
if (!skel->rodata->has_stack_arg) {
test__skip();
goto out;
}
if (!ASSERT_OK(stack_arg_kfunc__load(skel), "load"))
goto out;
run_subtest(skel->progs.test_stack_arg_scalar, 55);
run_subtest(skel->progs.test_stack_arg_ptr, 75);
run_subtest(skel->progs.test_stack_arg_mix, 66);
run_subtest(skel->progs.test_stack_arg_dynptr, 99);
run_subtest(skel->progs.test_stack_arg_mem, 151);
run_subtest(skel->progs.test_stack_arg_iter, 145);
run_subtest(skel->progs.test_stack_arg_const_str, 45);
run_subtest(skel->progs.test_stack_arg_timer, 45);
out:
stack_arg_kfunc__destroy(skel);
}
void test_stack_arg(void)
{
if (test__start_subtest("global_many_args"))
test_global_many();
if (test__start_subtest("async_cb_many_args"))
test_async_cb_many();
if (test__start_subtest("bpf2bpf"))
test_bpf2bpf();
if (test__start_subtest("kfunc"))
test_kfunc();
}
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