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selftests/landlock: Add wrappers.h

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Extract syscall wrappers to make them usable by standalone binaries (see
next commit).

Cc: Günther Noack <gnoack@google.com>
Link: https://lore.kernel.org/r/20250108154338.1129069-22-mic@digikod.net
[mic: Fix comments]
Signed-off-by: Mickaël Salaün <mic@digikod.net>
This commit is contained in:
Mickaël Salaün
2025-01-08 16:43:29 +01:00
parent 2107c35128
commit 5147779d5e
2 changed files with 48 additions and 36 deletions
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37
tools/testing/selftests/landlock/common.h
View File

@@ -9,17 +9,15 @@
#include <arpa/inet.h>
#include <errno.h>
#include <linux/landlock.h>
#include <linux/securebits.h>
#include <sys/capability.h>
#include <sys/socket.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/un.h>
#include <sys/wait.h>
#include <unistd.h>
#include "../kselftest_harness.h"
#include "wrappers.h"
#define TMP_DIR "tmp"
@@ -30,34 +28,6 @@
/* TEST_F_FORK() should not be used for new tests. */
#define TEST_F_FORK(fixture_name, test_name) TEST_F(fixture_name, test_name)
#ifndef landlock_create_ruleset
static inline int
landlock_create_ruleset(const struct landlock_ruleset_attr *const attr,
const size_t size, const __u32 flags)
{
return syscall(__NR_landlock_create_ruleset, attr, size, flags);
}
#endif
#ifndef landlock_add_rule
static inline int landlock_add_rule(const int ruleset_fd,
const enum landlock_rule_type rule_type,
const void *const rule_attr,
const __u32 flags)
{
return syscall(__NR_landlock_add_rule, ruleset_fd, rule_type, rule_attr,
flags);
}
#endif
#ifndef landlock_restrict_self
static inline int landlock_restrict_self(const int ruleset_fd,
const __u32 flags)
{
return syscall(__NR_landlock_restrict_self, ruleset_fd, flags);
}
#endif
static void _init_caps(struct __test_metadata *const _metadata, bool drop_all)
{
cap_t cap_p;
@@ -250,11 +220,6 @@ struct service_fixture {
};
};
static pid_t __maybe_unused sys_gettid(void)
{
return syscall(__NR_gettid);
}
static void __maybe_unused set_unix_address(struct service_fixture *const srv,
const unsigned short index)
{

47
tools/testing/selftests/landlock/wrappers.h Normal file
View File

@@ -0,0 +1,47 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Syscall wrappers
*
* Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
* Copyright © 2019-2020 ANSSI
* Copyright © 2021-2025 Microsoft Corporation
*/
#define _GNU_SOURCE
#include <linux/landlock.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>
#ifndef landlock_create_ruleset
static inline int
landlock_create_ruleset(const struct landlock_ruleset_attr *const attr,
const size_t size, const __u32 flags)
{
return syscall(__NR_landlock_create_ruleset, attr, size, flags);
}
#endif
#ifndef landlock_add_rule
static inline int landlock_add_rule(const int ruleset_fd,
const enum landlock_rule_type rule_type,
const void *const rule_attr,
const __u32 flags)
{
return syscall(__NR_landlock_add_rule, ruleset_fd, rule_type, rule_attr,
flags);
}
#endif
#ifndef landlock_restrict_self
static inline int landlock_restrict_self(const int ruleset_fd,
const __u32 flags)
{
return syscall(__NR_landlock_restrict_self, ruleset_fd, flags);
}
#endif
static inline pid_t sys_gettid(void)
{
return syscall(__NR_gettid);
}