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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
#define _GNU_SOURCE
#include <cgroup_helpers.h>
#include <test_progs.h>
#include <sched.h>
#include <sys/wait.h>
#include "cgrp_kfunc_failure.skel.h"
#include "cgrp_kfunc_success.skel.h"
static struct cgrp_kfunc_success *open_load_cgrp_kfunc_skel(void)
{
struct cgrp_kfunc_success *skel;
int err;
skel = cgrp_kfunc_success__open();
if (!ASSERT_OK_PTR(skel, "skel_open"))
return NULL;
skel->bss->pid = getpid();
err = cgrp_kfunc_success__load(skel);
if (!ASSERT_OK(err, "skel_load"))
goto cleanup;
return skel;
cleanup:
cgrp_kfunc_success__destroy(skel);
return NULL;
}
static int mkdir_rm_test_dir(void)
{
int fd;
const char *cgrp_path = "cgrp_kfunc";
fd = create_and_get_cgroup(cgrp_path);
if (!ASSERT_GT(fd, 0, "mkdir_cgrp_fd"))
return -1;
close(fd);
remove_cgroup(cgrp_path);
return 0;
}
static void run_success_test(const char *prog_name)
{
struct cgrp_kfunc_success *skel;
struct bpf_program *prog;
struct bpf_link *link = NULL;
skel = open_load_cgrp_kfunc_skel();
if (!ASSERT_OK_PTR(skel, "open_load_skel"))
return;
if (!ASSERT_OK(skel->bss->err, "pre_mkdir_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;
ASSERT_EQ(skel->bss->invocations, 0, "pre_rmdir_count");
if (!ASSERT_OK(mkdir_rm_test_dir(), "cgrp_mkdir"))
goto cleanup;
ASSERT_EQ(skel->bss->invocations, 1, "post_rmdir_count");
ASSERT_OK(skel->bss->err, "post_rmdir_err");
cleanup:
bpf_link__destroy(link);
cgrp_kfunc_success__destroy(skel);
}
static const char * const success_tests[] = {
"test_cgrp_acquire_release_argument",
"test_cgrp_acquire_leave_in_map",
"test_cgrp_xchg_release",
"test_cgrp_get_release",
"test_cgrp_get_ancestors",
"test_cgrp_from_id",
};
static void test_cgrp_from_id_ns(void)
{
LIBBPF_OPTS(bpf_test_run_opts, opts);
struct cgrp_kfunc_success *skel;
struct bpf_program *prog;
int pid, pipe_fd[2];
skel = open_load_cgrp_kfunc_skel();
if (!ASSERT_OK_PTR(skel, "open_load_skel"))
return;
if (!ASSERT_OK(skel->bss->err, "pre_mkdir_err"))
goto cleanup;
prog = skel->progs.test_cgrp_from_id_ns;
if (!ASSERT_OK(pipe(pipe_fd), "pipe"))
goto cleanup;
pid = fork();
if (!ASSERT_GE(pid, 0, "fork result")) {
close(pipe_fd[0]);
close(pipe_fd[1]);
goto cleanup;
}
if (pid == 0) {
int ret = 0;
close(pipe_fd[0]);
if (!ASSERT_GE(cgroup_setup_and_join("cgrp_from_id_ns"), 0, "join cgroup"))
exit(1);
if (!ASSERT_OK(unshare(CLONE_NEWCGROUP), "unshare cgns"))
exit(1);
ret = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts);
if (!ASSERT_OK(ret, "test run ret"))
exit(1);
if (!ASSERT_OK(opts.retval, "test run retval"))
exit(1);
if (!ASSERT_EQ(write(pipe_fd[1], &ret, sizeof(ret)), sizeof(ret), "write pipe"))
exit(1);
exit(0);
} else {
int res;
close(pipe_fd[1]);
ASSERT_EQ(read(pipe_fd[0], &res, sizeof(res)), sizeof(res), "read res");
ASSERT_EQ(waitpid(pid, NULL, 0), pid, "wait on child");
remove_cgroup_pid("cgrp_from_id_ns", pid);
ASSERT_OK(res, "result from run");
}
close(pipe_fd[0]);
cleanup:
cgrp_kfunc_success__destroy(skel);
}
void test_cgrp_kfunc(void)
{
int i, err;
err = setup_cgroup_environment();
if (!ASSERT_OK(err, "cgrp_env_setup"))
goto cleanup;
for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
if (!test__start_subtest(success_tests[i]))
continue;
run_success_test(success_tests[i]);
}
if (test__start_subtest("test_cgrp_from_id_ns"))
test_cgrp_from_id_ns();
RUN_TESTS(cgrp_kfunc_failure);
cleanup:
cleanup_cgroup_environment();
}
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