src/idmapped-mounts/missing.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef __IDMAP_MISSING_H
   4 #define __IDMAP_MISSING_H
   5
   6 #ifndef _GNU_SOURCE
   7 #define _GNU_SOURCE
   8 #endif
   9 #include "../global.h"
  10
  11 #include <errno.h>
  12 #include <linux/types.h>
  13 #include <sched.h>
  14 #include <signal.h>
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include <sys/types.h>
  19 #include <syscall.h>
  20 #include <unistd.h>
  21
  22 #ifndef __NR_mount_setattr
  23         #if defined __alpha__
  24                 #define __NR_mount_setattr 552
  25         #elif defined _MIPS_SIM
  26                 #if _MIPS_SIM == _MIPS_SIM_ABI32        /* o32 */
  27                         #define __NR_mount_setattr (442 + 4000)
  28                 #endif
  29                 #if _MIPS_SIM == _MIPS_SIM_NABI32       /* n32 */
  30                         #define __NR_mount_setattr (442 + 6000)
  31                 #endif
  32                 #if _MIPS_SIM == _MIPS_SIM_ABI64        /* n64 */
  33                         #define __NR_mount_setattr (442 + 5000)
  34                 #endif
  35         #elif defined __ia64__
  36                 #define __NR_mount_setattr (442 + 1024)
  37         #else
  38                 #define __NR_mount_setattr 442
  39         #endif
  40 #endif
  41
  42 #ifndef __NR_open_tree
  43         #if defined __alpha__
  44                 #define __NR_open_tree 538
  45         #elif defined _MIPS_SIM
  46                 #if _MIPS_SIM == _MIPS_SIM_ABI32        /* o32 */
  47                         #define __NR_open_tree 4428
  48                 #endif
  49                 #if _MIPS_SIM == _MIPS_SIM_NABI32       /* n32 */
  50                         #define __NR_open_tree 6428
  51                 #endif
  52                 #if _MIPS_SIM == _MIPS_SIM_ABI64        /* n64 */
  53                         #define __NR_open_tree 5428
  54                 #endif
  55         #elif defined __ia64__
  56                 #define __NR_open_tree (428 + 1024)
  57         #else
  58                 #define __NR_open_tree 428
  59         #endif
  60 #endif
  61
  62 #ifndef __NR_move_mount
  63         #if defined __alpha__
  64                 #define __NR_move_mount 539
  65         #elif defined _MIPS_SIM
  66                 #if _MIPS_SIM == _MIPS_SIM_ABI32        /* o32 */
  67                         #define __NR_move_mount 4429
  68                 #endif
  69                 #if _MIPS_SIM == _MIPS_SIM_NABI32       /* n32 */
  70                         #define __NR_move_mount 6429
  71                 #endif
  72                 #if _MIPS_SIM == _MIPS_SIM_ABI64        /* n64 */
  73                         #define __NR_move_mount 5429
  74                 #endif
  75         #elif defined __ia64__
  76                 #define __NR_move_mount (428 + 1024)
  77         #else
  78                 #define __NR_move_mount 429
  79         #endif
  80 #endif
  81
  82 #ifndef MNT_DETACH
  83 #define MNT_DETACH 2
  84 #endif
  85
  86 #ifndef MS_REC
  87 #define MS_REC 1638
  88 #endif
  89
  90 #ifndef MS_PRIVATE
  91 #define MS_PRIVATE (1 << 18)
  92 #endif
  93
  94 #ifndef MOVE_MOUNT_F_EMPTY_PATH
  95 #define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */
  96 #endif
  97
  98 #ifndef MOUNT_ATTR_IDMAP
  99 #define MOUNT_ATTR_IDMAP 0x00100000
 100 #endif
 101
 102 #ifndef OPEN_TREE_CLONE
 103 #define OPEN_TREE_CLONE 1
 104 #endif
 105
 106 #ifndef OPEN_TREE_CLOEXEC
 107 #define OPEN_TREE_CLOEXEC O_CLOEXEC
 108 #endif
 109
 110 #ifndef AT_RECURSIVE
 111 #define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */
 112 #endif
 113
 114 #ifndef HAVE_STRUCT_MOUNT_ATTR
 115 struct mount_attr {
 116         __u64 attr_set;
 117         __u64 attr_clr;
 118         __u64 propagation;
 119         __u64 userns_fd;
 120 };
 121 #endif
 122
 123 static inline int sys_mount_setattr(int dfd, const char *path, unsigned int flags,
 124                                     struct mount_attr *attr, size_t size)
 125 {
 126         return syscall(__NR_mount_setattr, dfd, path, flags, attr, size);
 127 }
 128
 129 static inline int sys_open_tree(int dfd, const char *filename, unsigned int flags)
 130 {
 131         return syscall(__NR_open_tree, dfd, filename, flags);
 132 }
 133
 134 static inline int sys_move_mount(int from_dfd, const char *from_pathname, int to_dfd,
 135                                  const char *to_pathname, unsigned int flags)
 136 {
 137         return syscall(__NR_move_mount, from_dfd, from_pathname, to_dfd, to_pathname, flags);
 138 }
 139
 140 static inline int sys_mount(const char *source, const char *target, const char *fstype,
 141                             unsigned long int flags, const void *data)
 142 {
 143         return syscall(__NR_mount, source, target, fstype, flags, data);
 144 }
 145
 146 static inline int sys_umount2(const char *path, int flags)
 147 {
 148         return syscall(__NR_umount2, path, flags);
 149 }
 150
 151 #endif /* __IDMAP_MISSING_H */