// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2020 Linaro Limited. All rights reserved.
* Author: Viresh Kumar <viresh.kumar@linaro.org>
*/
#ifndef FSMOUNT_H__
#define FSMOUNT_H__
#include <sys/mount.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include "config.h"
#include "lapi/fcntl.h"
#include "lapi/syscalls.h"
#ifndef HAVE_FSOPEN
int fsopen(const char *fsname, unsigned int flags)
{
return tst_syscall(__NR_fsopen, fsname, flags);
}
#endif /* HAVE_FSOPEN */
#ifndef HAVE_FSCONFIG
int fsconfig(int fd, unsigned int cmd, const char *key,
const void *value, int aux)
{
return tst_syscall(__NR_fsconfig, fd, cmd, key, value, aux);
}
#endif /* HAVE_FSCONFIG */
#ifndef HAVE_FSMOUNT
int fsmount(int fd, unsigned int flags, unsigned int mount_attrs)
{
return tst_syscall(__NR_fsmount, fd, flags, mount_attrs);
}
#endif /* HAVE_FSMOUNT */
#ifndef HAVE_FSPICK
int fspick(int dirfd, const char *pathname, unsigned int flags)
{
return tst_syscall(__NR_fspick, dirfd, pathname, flags);
}
#endif /* HAVE_FSPICK */
#ifndef HAVE_MOVE_MOUNT
int move_mount(int from_dirfd, const char *from_pathname, int to_dirfd,
const char *to_pathname, unsigned int flags)
{
return tst_syscall(__NR_move_mount, from_dirfd, from_pathname, to_dirfd,
to_pathname, flags);
}
#endif /* HAVE_MOVE_MOUNT */
#ifndef HAVE_OPEN_TREE
int open_tree(int dirfd, const char *pathname, unsigned int flags)
{
return tst_syscall(__NR_open_tree, dirfd, pathname, flags);
}
#endif /* HAVE_OPEN_TREE */
/*
* New headers added in kernel after 5.2 release, create them for old userspace.
*/
#ifndef OPEN_TREE_CLONE
/*
* open_tree() flags.
*/
#define OPEN_TREE_CLONE 1 /* Clone the target tree and attach the clone */
#define OPEN_TREE_CLOEXEC O_CLOEXEC /* Close the file on execve() */
/*
* move_mount() flags.
*/
#define MOVE_MOUNT_F_SYMLINKS 0x00000001 /* Follow symlinks on from path */
#define MOVE_MOUNT_F_AUTOMOUNTS 0x00000002 /* Follow automounts on from path */
#define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */
#define MOVE_MOUNT_T_SYMLINKS 0x00000010 /* Follow symlinks on to path */
#define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020 /* Follow automounts on to path */
#define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */
#define MOVE_MOUNT__MASK 0x00000077
/*
* fsopen() flags.
*/
#define FSOPEN_CLOEXEC 0x00000001
/*
* fspick() flags.
*/
#define FSPICK_CLOEXEC 0x00000001
#define FSPICK_SYMLINK_NOFOLLOW 0x00000002
#define FSPICK_NO_AUTOMOUNT 0x00000004
#define FSPICK_EMPTY_PATH 0x00000008
/*
* The type of fsconfig() call made.
*/
enum fsconfig_command {
FSCONFIG_SET_FLAG = 0, /* Set parameter, supplying no value */
FSCONFIG_SET_STRING = 1, /* Set parameter, supplying a string value */
FSCONFIG_SET_BINARY = 2, /* Set parameter, supplying a binary blob value */
FSCONFIG_SET_PATH = 3, /* Set parameter, supplying an object by path */
FSCONFIG_SET_PATH_EMPTY = 4, /* Set parameter, supplying an object by (empty) path */
FSCONFIG_SET_FD = 5, /* Set parameter, supplying an object by fd */
FSCONFIG_CMD_CREATE = 6, /* Invoke superblock creation */
FSCONFIG_CMD_RECONFIGURE = 7, /* Invoke superblock reconfiguration */
};
/*
* fsmount() flags.
*/
#define FSMOUNT_CLOEXEC 0x00000001
/*
* Mount attributes.
*/
#define MOUNT_ATTR_RDONLY 0x00000001 /* Mount read-only */
#define MOUNT_ATTR_NOSUID 0x00000002 /* Ignore suid and sgid bits */
#define MOUNT_ATTR_NODEV 0x00000004 /* Disallow access to device special files */
#define MOUNT_ATTR_NOEXEC 0x00000008 /* Disallow program execution */
#define MOUNT_ATTR__ATIME 0x00000070 /* Setting on how atime should be updated */
#define MOUNT_ATTR_RELATIME 0x00000000 /* - Update atime relative to mtime/ctime. */
#define MOUNT_ATTR_NOATIME 0x00000010 /* - Do not update access times. */
#define MOUNT_ATTR_STRICTATIME 0x00000020 /* - Always perform atime updates */
#define MOUNT_ATTR_NODIRATIME 0x00000080 /* Do not update directory access times */
#endif /* OPEN_TREE_CLONE */
void fsopen_supported_by_kernel(void)
{
if ((tst_kvercmp(5, 2, 0)) < 0) {
/* Check if the syscall is backported on an older kernel */
TEST(syscall(__NR_fsopen, NULL, 0));
if (TST_RET != -1)
SAFE_CLOSE(TST_RET);
else if (TST_ERR == ENOSYS)
tst_brk(TCONF, "Test not supported on kernel version < v5.2");
}
}
#endif /* FSMOUNT_H__ */
