wrappers.h

  1// SPDX-License-Identifier: GPL-2.0
  2//
  3#ifndef __SELFTEST_OVERLAYFS_WRAPPERS_H__
  4#define __SELFTEST_OVERLAYFS_WRAPPERS_H__
  5
  6#define _GNU_SOURCE
  7
  8#include <linux/types.h>
  9#include <linux/mount.h>
 10#include <sys/syscall.h>
 11
 12#ifndef STATX_MNT_ID_UNIQUE
 13#define STATX_MNT_ID_UNIQUE 0x00004000U /* Want/got extended stx_mount_id */
 14#endif
 15
 16static inline int sys_fsopen(const char *fsname, unsigned int flags)
 17{
 18	return syscall(__NR_fsopen, fsname, flags);
 19}
 20
 21static inline int sys_fsconfig(int fd, unsigned int cmd, const char *key,
 22			       const char *value, int aux)
 23{
 24	return syscall(__NR_fsconfig, fd, cmd, key, value, aux);
 25}
 26
 27static inline int sys_fsmount(int fd, unsigned int flags,
 28			      unsigned int attr_flags)
 29{
 30	return syscall(__NR_fsmount, fd, flags, attr_flags);
 31}
 32
 33static inline int sys_mount(const char *src, const char *tgt, const char *fst,
 34			    unsigned long flags, const void *data)
 35{
 36	return syscall(__NR_mount, src, tgt, fst, flags, data);
 37}
 38
 39#ifndef MOVE_MOUNT_F_EMPTY_PATH
 40#define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */
 41#endif
 42
 43#ifndef MOVE_MOUNT_T_EMPTY_PATH
 44#define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */
 45#endif
 46
 47#ifndef __NR_move_mount
 48	#if defined __alpha__
 49		#define __NR_move_mount 539
 50	#elif defined _MIPS_SIM
 51		#if _MIPS_SIM == _MIPS_SIM_ABI32	/* o32 */
 52			#define __NR_move_mount 4429
 53		#endif
 54		#if _MIPS_SIM == _MIPS_SIM_NABI32	/* n32 */
 55			#define __NR_move_mount 6429
 56		#endif
 57		#if _MIPS_SIM == _MIPS_SIM_ABI64	/* n64 */
 58			#define __NR_move_mount 5429
 59		#endif
 60	#else
 61		#define __NR_move_mount 429
 62	#endif
 63#endif
 64
 65static inline int sys_move_mount(int from_dfd, const char *from_pathname,
 66				 int to_dfd, const char *to_pathname,
 67				 unsigned int flags)
 68{
 69	return syscall(__NR_move_mount, from_dfd, from_pathname, to_dfd,
 70		       to_pathname, flags);
 71}
 72
 73#ifndef OPEN_TREE_CLONE
 74#define OPEN_TREE_CLONE 1
 75#endif
 76
 77#ifndef OPEN_TREE_CLOEXEC
 78#define OPEN_TREE_CLOEXEC O_CLOEXEC
 79#endif
 80
 81#ifndef AT_RECURSIVE
 82#define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */
 83#endif
 84
 85#ifndef __NR_open_tree
 86	#if defined __alpha__
 87		#define __NR_open_tree 538
 88	#elif defined _MIPS_SIM
 89		#if _MIPS_SIM == _MIPS_SIM_ABI32	/* o32 */
 90			#define __NR_open_tree 4428
 91		#endif
 92		#if _MIPS_SIM == _MIPS_SIM_NABI32	/* n32 */
 93			#define __NR_open_tree 6428
 94		#endif
 95		#if _MIPS_SIM == _MIPS_SIM_ABI64	/* n64 */
 96			#define __NR_open_tree 5428
 97		#endif
 98	#else
 99		#define __NR_open_tree 428
100	#endif
101#endif
102
103static inline int sys_open_tree(int dfd, const char *filename, unsigned int flags)
104{
105	return syscall(__NR_open_tree, dfd, filename, flags);
106}
107
108#endif