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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
#define _GNU_SOURCE
#include <sys/wait.h>
#include <test_progs.h>
#include <unistd.h>
#include "task_kfunc_failure.skel.h"
#include "task_kfunc_success.skel.h"
static struct task_kfunc_success *open_load_task_kfunc_skel(void)
{
struct task_kfunc_success *skel;
int err;
skel = task_kfunc_success__open();
if (!ASSERT_OK_PTR(skel, "skel_open"))
return NULL;
skel->bss->pid = getpid();
err = task_kfunc_success__load(skel);
if (!ASSERT_OK(err, "skel_load"))
goto cleanup;
return skel;
cleanup:
task_kfunc_success__destroy(skel);
return NULL;
}
static void run_success_test(const char *prog_name)
{
struct task_kfunc_success *skel;
int status;
pid_t child_pid;
struct bpf_program *prog;
struct bpf_link *link = NULL;
skel = open_load_task_kfunc_skel();
if (!ASSERT_OK_PTR(skel, "open_load_skel"))
return;
if (!ASSERT_OK(skel->bss->err, "pre_spawn_err"))
goto cleanup;
prog = bpf_object__find_program_by_name(skel->obj, prog_name);
if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
goto cleanup;
link = bpf_program__attach(prog);
if (!ASSERT_OK_PTR(link, "attached_link"))
goto cleanup;
child_pid = fork();
if (!ASSERT_GT(child_pid, -1, "child_pid"))
goto cleanup;
if (child_pid == 0)
_exit(0);
waitpid(child_pid, &status, 0);
ASSERT_OK(skel->bss->err, "post_wait_err");
cleanup:
bpf_link__destroy(link);
task_kfunc_success__destroy(skel);
}
static void run_syscall_success_test(const char *prog_name)
{
LIBBPF_OPTS(bpf_test_run_opts, opts);
struct task_kfunc_success *skel;
struct bpf_program *prog;
int err;
skel = open_load_task_kfunc_skel();
if (!ASSERT_OK_PTR(skel, "open_load_skel"))
return;
if (!ASSERT_OK(skel->bss->err, "pre_run_err"))
goto cleanup;
prog = bpf_object__find_program_by_name(skel->obj, prog_name);
if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
goto cleanup;
err = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts);
if (!ASSERT_OK(err, "bpf_prog_test_run_opts"))
goto cleanup;
if (!ASSERT_EQ(opts.retval, 0, "retval"))
goto cleanup;
ASSERT_OK(skel->bss->err, "post_run_err");
cleanup:
task_kfunc_success__destroy(skel);
}
static int run_vpid_test(void *prog_name)
{
struct task_kfunc_success *skel;
struct bpf_program *prog;
int prog_fd, err = 0;
if (getpid() != 1)
return 1;
skel = open_load_task_kfunc_skel();
if (!skel)
return 2;
if (skel->bss->err) {
err = 3;
goto cleanup;
}
prog = bpf_object__find_program_by_name(skel->obj, prog_name);
if (!prog) {
err = 4;
goto cleanup;
}
prog_fd = bpf_program__fd(prog);
if (prog_fd < 0) {
err = 5;
goto cleanup;
}
if (bpf_prog_test_run_opts(prog_fd, NULL)) {
err = 6;
goto cleanup;
}
if (skel->bss->err)
err = 7 + skel->bss->err;
cleanup:
task_kfunc_success__destroy(skel);
return err;
}
static void run_vpid_success_test(const char *prog_name)
{
const int stack_size = 1024 * 1024;
int child_pid, wstatus;
char *stack;
stack = (char *)malloc(stack_size);
if (!ASSERT_OK_PTR(stack, "clone_stack"))
return;
child_pid = clone(run_vpid_test, stack + stack_size,
CLONE_NEWPID | SIGCHLD, (void *)prog_name);
if (!ASSERT_GT(child_pid, -1, "child_pid"))
goto cleanup;
if (!ASSERT_GT(waitpid(child_pid, &wstatus, 0), -1, "waitpid"))
goto cleanup;
if (WEXITSTATUS(wstatus) > 7)
ASSERT_OK(WEXITSTATUS(wstatus) - 7, "vpid_test_failure");
else
ASSERT_OK(WEXITSTATUS(wstatus), "run_vpid_test_err");
cleanup:
free(stack);
}
static const char * const success_tests[] = {
"test_task_acquire_release_argument",
"test_task_acquire_release_current",
"test_task_acquire_leave_in_map",
"test_task_map_acquire_release",
"test_task_current_acquire_release",
"test_task_from_pid_arg",
"test_task_from_pid_current",
"test_task_from_pid_invalid",
"task_kfunc_acquire_trusted_walked",
"task_kfunc_acquire_after_spin_unlock_non_sleepable",
"task_kfunc_acquire_after_spin_unlock_explicit_rcu",
"task_kfunc_acquire_after_spin_unlock_preempt_disabled",
"task_kfunc_acquire_after_spin_unlock_irq_disabled",
"task_kfunc_acquire_after_rcu_unlock_preempt_disabled",
"task_kfunc_acquire_after_rcu_unlock_irq_disabled",
"task_kfunc_acquire_after_preempt_enable_explicit_rcu",
"task_kfunc_acquire_after_irq_restore_explicit_rcu",
"test_task_kfunc_flavor_relo",
"test_task_kfunc_flavor_relo_not_found",
};
static const char * const syscall_success_tests[] = {
"test_task_xchg_release",
};
static const char * const vpid_success_tests[] = {
"test_task_from_vpid_current",
"test_task_from_vpid_invalid",
};
void test_task_kfunc(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
if (!test__start_subtest(success_tests[i]))
continue;
run_success_test(success_tests[i]);
}
for (i = 0; i < ARRAY_SIZE(syscall_success_tests); i++) {
if (!test__start_subtest(syscall_success_tests[i]))
continue;
run_syscall_success_test(syscall_success_tests[i]);
}
for (i = 0; i < ARRAY_SIZE(vpid_success_tests); i++) {
if (!test__start_subtest(vpid_success_tests[i]))
continue;
run_vpid_success_test(vpid_success_tests[i]);
}
RUN_TESTS(task_kfunc_failure);
}
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