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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2023 Yafang Shao <laoar.shao@gmail.com> */
#include <sys/types.h>
#include <unistd.h>
#include <test_progs.h>
#include "cgroup_helpers.h"
#include "test_cgroup1_hierarchy.skel.h"
static void bpf_cgroup1(struct test_cgroup1_hierarchy *skel)
{
struct bpf_link *lsm_link, *fentry_link;
int err;
/* Attach LSM prog first */
lsm_link = bpf_program__attach_lsm(skel->progs.lsm_run);
if (!ASSERT_OK_PTR(lsm_link, "lsm_attach"))
return;
/* LSM prog will be triggered when attaching fentry */
fentry_link = bpf_program__attach_trace(skel->progs.fentry_run);
ASSERT_NULL(fentry_link, "fentry_attach_fail");
err = bpf_link__destroy(lsm_link);
ASSERT_OK(err, "destroy_lsm");
}
static void bpf_cgroup1_sleepable(struct test_cgroup1_hierarchy *skel)
{
struct bpf_link *lsm_link, *fentry_link;
int err;
/* Attach LSM prog first */
lsm_link = bpf_program__attach_lsm(skel->progs.lsm_s_run);
if (!ASSERT_OK_PTR(lsm_link, "lsm_attach"))
return;
/* LSM prog will be triggered when attaching fentry */
fentry_link = bpf_program__attach_trace(skel->progs.fentry_run);
ASSERT_NULL(fentry_link, "fentry_attach_fail");
err = bpf_link__destroy(lsm_link);
ASSERT_OK(err, "destroy_lsm");
}
static void bpf_cgroup1_invalid_id(struct test_cgroup1_hierarchy *skel)
{
struct bpf_link *lsm_link, *fentry_link;
int err;
/* Attach LSM prog first */
lsm_link = bpf_program__attach_lsm(skel->progs.lsm_run);
if (!ASSERT_OK_PTR(lsm_link, "lsm_attach"))
return;
/* LSM prog will be triggered when attaching fentry */
fentry_link = bpf_program__attach_trace(skel->progs.fentry_run);
if (!ASSERT_OK_PTR(fentry_link, "fentry_attach_success"))
goto cleanup;
err = bpf_link__destroy(fentry_link);
ASSERT_OK(err, "destroy_lsm");
cleanup:
err = bpf_link__destroy(lsm_link);
ASSERT_OK(err, "destroy_fentry");
}
void test_cgroup1_hierarchy(void)
{
struct test_cgroup1_hierarchy *skel;
__u64 current_cgid;
int hid, err;
skel = test_cgroup1_hierarchy__open();
if (!ASSERT_OK_PTR(skel, "open"))
return;
skel->bss->target_pid = getpid();
err = bpf_program__set_attach_target(skel->progs.fentry_run, 0, "bpf_fentry_test1");
if (!ASSERT_OK(err, "fentry_set_target"))
goto destroy;
err = test_cgroup1_hierarchy__load(skel);
if (!ASSERT_OK(err, "load"))
goto destroy;
/* Setup cgroup1 hierarchy */
err = setup_cgroup_environment();
if (!ASSERT_OK(err, "setup_cgroup_environment"))
goto destroy;
err = setup_classid_environment();
if (!ASSERT_OK(err, "setup_classid_environment"))
goto cleanup_cgroup;
err = join_classid();
if (!ASSERT_OK(err, "join_cgroup1"))
goto cleanup;
current_cgid = get_classid_cgroup_id();
if (!ASSERT_GE(current_cgid, 0, "cgroup1 id"))
goto cleanup;
hid = get_cgroup1_hierarchy_id("net_cls");
if (!ASSERT_GE(hid, 0, "cgroup1 id"))
goto cleanup;
skel->bss->target_hid = hid;
if (test__start_subtest("test_cgroup1_hierarchy")) {
skel->bss->target_ancestor_cgid = current_cgid;
bpf_cgroup1(skel);
}
if (test__start_subtest("test_root_cgid")) {
skel->bss->target_ancestor_cgid = 1;
skel->bss->target_ancestor_level = 0;
bpf_cgroup1(skel);
}
if (test__start_subtest("test_invalid_level")) {
skel->bss->target_ancestor_cgid = 1;
skel->bss->target_ancestor_level = 1;
bpf_cgroup1_invalid_id(skel);
}
if (test__start_subtest("test_invalid_cgid")) {
skel->bss->target_ancestor_cgid = 0;
bpf_cgroup1_invalid_id(skel);
}
if (test__start_subtest("test_invalid_hid")) {
skel->bss->target_ancestor_cgid = 1;
skel->bss->target_ancestor_level = 0;
skel->bss->target_hid = -1;
bpf_cgroup1_invalid_id(skel);
}
if (test__start_subtest("test_invalid_cgrp_name")) {
skel->bss->target_hid = get_cgroup1_hierarchy_id("net_cl");
skel->bss->target_ancestor_cgid = current_cgid;
bpf_cgroup1_invalid_id(skel);
}
if (test__start_subtest("test_invalid_cgrp_name2")) {
skel->bss->target_hid = get_cgroup1_hierarchy_id("net_cls,");
skel->bss->target_ancestor_cgid = current_cgid;
bpf_cgroup1_invalid_id(skel);
}
if (test__start_subtest("test_sleepable_prog")) {
skel->bss->target_hid = hid;
skel->bss->target_ancestor_cgid = current_cgid;
bpf_cgroup1_sleepable(skel);
}
cleanup:
cleanup_classid_environment();
cleanup_cgroup:
cleanup_cgroup_environment();
destroy:
test_cgroup1_hierarchy__destroy(skel);
}
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