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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2022 Huawei Technologies Duesseldorf GmbH
*
* Author: Roberto Sassu <roberto.sassu@huawei.com>
*/
#include <linux/keyctl.h>
#include <test_progs.h>
#include "test_lookup_key.skel.h"
#define KEY_LOOKUP_CREATE 0x01
#define KEY_LOOKUP_PARTIAL 0x02
static bool kfunc_not_supported;
static int libbpf_print_cb(enum libbpf_print_level level, const char *fmt,
va_list args)
{
char *func;
if (strcmp(fmt, "libbpf: extern (func ksym) '%s': not found in kernel or module BTFs\n"))
return 0;
func = va_arg(args, char *);
if (strcmp(func, "bpf_lookup_user_key") && strcmp(func, "bpf_key_put") &&
strcmp(func, "bpf_lookup_system_key"))
return 0;
kfunc_not_supported = true;
return 0;
}
void test_lookup_key(void)
{
libbpf_print_fn_t old_print_cb;
struct test_lookup_key *skel;
__u32 next_id;
int ret;
skel = test_lookup_key__open();
if (!ASSERT_OK_PTR(skel, "test_lookup_key__open"))
return;
old_print_cb = libbpf_set_print(libbpf_print_cb);
ret = test_lookup_key__load(skel);
libbpf_set_print(old_print_cb);
if (ret < 0 && kfunc_not_supported) {
printf("%s:SKIP:bpf_lookup_*_key(), bpf_key_put() kfuncs not supported\n",
__func__);
test__skip();
goto close_prog;
}
if (!ASSERT_OK(ret, "test_lookup_key__load"))
goto close_prog;
ret = test_lookup_key__attach(skel);
if (!ASSERT_OK(ret, "test_lookup_key__attach"))
goto close_prog;
skel->bss->monitored_pid = getpid();
skel->bss->key_serial = KEY_SPEC_THREAD_KEYRING;
/* The thread-specific keyring does not exist, this test fails. */
skel->bss->flags = 0;
ret = bpf_prog_get_next_id(0, &next_id);
if (!ASSERT_LT(ret, 0, "bpf_prog_get_next_id"))
goto close_prog;
/* Force creation of the thread-specific keyring, this test succeeds. */
skel->bss->flags = KEY_LOOKUP_CREATE;
ret = bpf_prog_get_next_id(0, &next_id);
if (!ASSERT_OK(ret, "bpf_prog_get_next_id"))
goto close_prog;
/* Pass both lookup flags for parameter validation. */
skel->bss->flags = KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL;
ret = bpf_prog_get_next_id(0, &next_id);
if (!ASSERT_OK(ret, "bpf_prog_get_next_id"))
goto close_prog;
/* Pass invalid flags. */
skel->bss->flags = UINT64_MAX;
ret = bpf_prog_get_next_id(0, &next_id);
if (!ASSERT_LT(ret, 0, "bpf_prog_get_next_id"))
goto close_prog;
skel->bss->key_serial = 0;
skel->bss->key_id = 1;
ret = bpf_prog_get_next_id(0, &next_id);
if (!ASSERT_OK(ret, "bpf_prog_get_next_id"))
goto close_prog;
skel->bss->key_id = UINT32_MAX;
ret = bpf_prog_get_next_id(0, &next_id);
ASSERT_LT(ret, 0, "bpf_prog_get_next_id");
close_prog:
skel->bss->monitored_pid = 0;
test_lookup_key__destroy(skel);
}
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