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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Facebook */
#include <test_progs.h>
#include <bpf/btf.h>
#include "test_btf_decl_tag.skel.h"
/* struct btf_type_tag_test is referenced in btf_type_tag.skel.h */
struct btf_type_tag_test {
int **p;
};
#include "btf_type_tag.skel.h"
#include "btf_type_tag_user.skel.h"
#include "btf_type_tag_percpu.skel.h"
static void test_btf_decl_tag(void)
{
struct test_btf_decl_tag *skel;
skel = test_btf_decl_tag__open_and_load();
if (!ASSERT_OK_PTR(skel, "btf_decl_tag"))
return;
if (skel->rodata->skip_tests) {
printf("%s:SKIP: btf_decl_tag attribute not supported", __func__);
test__skip();
}
test_btf_decl_tag__destroy(skel);
}
static void test_btf_type_tag(void)
{
struct btf_type_tag *skel;
skel = btf_type_tag__open_and_load();
if (!ASSERT_OK_PTR(skel, "btf_type_tag"))
return;
if (skel->rodata->skip_tests) {
printf("%s:SKIP: btf_type_tag attribute not supported", __func__);
test__skip();
}
btf_type_tag__destroy(skel);
}
/* loads vmlinux_btf as well as module_btf. If the caller passes NULL as
* module_btf, it will not load module btf.
*
* Returns 0 on success.
* Return -1 On error. In case of error, the loaded btf will be freed and the
* input parameters will be set to pointing to NULL.
*/
static int load_btfs(struct btf **vmlinux_btf, struct btf **module_btf,
bool needs_vmlinux_tag)
{
const char *module_name = "bpf_testmod";
__s32 type_id;
if (!env.has_testmod) {
test__skip();
return -1;
}
*vmlinux_btf = btf__load_vmlinux_btf();
if (!ASSERT_OK_PTR(*vmlinux_btf, "could not load vmlinux BTF"))
return -1;
if (!needs_vmlinux_tag)
goto load_module_btf;
/* skip the test if the vmlinux does not have __user tags */
type_id = btf__find_by_name_kind(*vmlinux_btf, "user", BTF_KIND_TYPE_TAG);
if (type_id <= 0) {
printf("%s:SKIP: btf_type_tag attribute not in vmlinux btf", __func__);
test__skip();
goto free_vmlinux_btf;
}
load_module_btf:
/* skip loading module_btf, if not requested by caller */
if (!module_btf)
return 0;
*module_btf = btf__load_module_btf(module_name, *vmlinux_btf);
if (!ASSERT_OK_PTR(*module_btf, "could not load module BTF"))
goto free_vmlinux_btf;
/* skip the test if the module does not have __user tags */
type_id = btf__find_by_name_kind(*module_btf, "user", BTF_KIND_TYPE_TAG);
if (type_id <= 0) {
printf("%s:SKIP: btf_type_tag attribute not in %s", __func__, module_name);
test__skip();
goto free_module_btf;
}
return 0;
free_module_btf:
btf__free(*module_btf);
free_vmlinux_btf:
btf__free(*vmlinux_btf);
*vmlinux_btf = NULL;
if (module_btf)
*module_btf = NULL;
return -1;
}
static void test_btf_type_tag_mod_user(bool load_test_user1)
{
struct btf *vmlinux_btf = NULL, *module_btf = NULL;
struct btf_type_tag_user *skel;
int err;
if (load_btfs(&vmlinux_btf, &module_btf, /*needs_vmlinux_tag=*/false))
return;
skel = btf_type_tag_user__open();
if (!ASSERT_OK_PTR(skel, "btf_type_tag_user"))
goto cleanup;
bpf_program__set_autoload(skel->progs.test_sys_getsockname, false);
if (load_test_user1)
bpf_program__set_autoload(skel->progs.test_user2, false);
else
bpf_program__set_autoload(skel->progs.test_user1, false);
err = btf_type_tag_user__load(skel);
ASSERT_ERR(err, "btf_type_tag_user");
btf_type_tag_user__destroy(skel);
cleanup:
btf__free(module_btf);
btf__free(vmlinux_btf);
}
static void test_btf_type_tag_vmlinux_user(void)
{
struct btf_type_tag_user *skel;
struct btf *vmlinux_btf = NULL;
int err;
if (load_btfs(&vmlinux_btf, NULL, /*needs_vmlinux_tag=*/true))
return;
skel = btf_type_tag_user__open();
if (!ASSERT_OK_PTR(skel, "btf_type_tag_user"))
goto cleanup;
bpf_program__set_autoload(skel->progs.test_user2, false);
bpf_program__set_autoload(skel->progs.test_user1, false);
err = btf_type_tag_user__load(skel);
ASSERT_ERR(err, "btf_type_tag_user");
btf_type_tag_user__destroy(skel);
cleanup:
btf__free(vmlinux_btf);
}
static void test_btf_type_tag_mod_percpu(bool load_test_percpu1)
{
struct btf *vmlinux_btf, *module_btf;
struct btf_type_tag_percpu *skel;
int err;
if (load_btfs(&vmlinux_btf, &module_btf, /*needs_vmlinux_tag=*/false))
return;
skel = btf_type_tag_percpu__open();
if (!ASSERT_OK_PTR(skel, "btf_type_tag_percpu"))
goto cleanup;
bpf_program__set_autoload(skel->progs.test_percpu_load, false);
bpf_program__set_autoload(skel->progs.test_percpu_helper, false);
if (load_test_percpu1)
bpf_program__set_autoload(skel->progs.test_percpu2, false);
else
bpf_program__set_autoload(skel->progs.test_percpu1, false);
err = btf_type_tag_percpu__load(skel);
ASSERT_ERR(err, "btf_type_tag_percpu");
btf_type_tag_percpu__destroy(skel);
cleanup:
btf__free(module_btf);
btf__free(vmlinux_btf);
}
static void test_btf_type_tag_vmlinux_percpu(bool load_test)
{
struct btf_type_tag_percpu *skel;
struct btf *vmlinux_btf = NULL;
int err;
if (load_btfs(&vmlinux_btf, NULL, /*needs_vmlinux_tag=*/true))
return;
skel = btf_type_tag_percpu__open();
if (!ASSERT_OK_PTR(skel, "btf_type_tag_percpu"))
goto cleanup;
bpf_program__set_autoload(skel->progs.test_percpu2, false);
bpf_program__set_autoload(skel->progs.test_percpu1, false);
if (load_test) {
bpf_program__set_autoload(skel->progs.test_percpu_helper, false);
err = btf_type_tag_percpu__load(skel);
ASSERT_ERR(err, "btf_type_tag_percpu_load");
} else {
bpf_program__set_autoload(skel->progs.test_percpu_load, false);
err = btf_type_tag_percpu__load(skel);
ASSERT_OK(err, "btf_type_tag_percpu_helper");
}
btf_type_tag_percpu__destroy(skel);
cleanup:
btf__free(vmlinux_btf);
}
void test_btf_tag(void)
{
if (test__start_subtest("btf_decl_tag"))
test_btf_decl_tag();
if (test__start_subtest("btf_type_tag"))
test_btf_type_tag();
if (test__start_subtest("btf_type_tag_user_mod1"))
test_btf_type_tag_mod_user(true);
if (test__start_subtest("btf_type_tag_user_mod2"))
test_btf_type_tag_mod_user(false);
if (test__start_subtest("btf_type_tag_sys_user_vmlinux"))
test_btf_type_tag_vmlinux_user();
if (test__start_subtest("btf_type_tag_percpu_mod1"))
test_btf_type_tag_mod_percpu(true);
if (test__start_subtest("btf_type_tag_percpu_mod2"))
test_btf_type_tag_mod_percpu(false);
if (test__start_subtest("btf_type_tag_percpu_vmlinux_load"))
test_btf_type_tag_vmlinux_percpu(true);
if (test__start_subtest("btf_type_tag_percpu_vmlinux_helper"))
test_btf_type_tag_vmlinux_percpu(false);
}
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